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4273664a1b
If we modify the "connection" header we send to the server, update the TX_SRV_CONN_KA flag.
5439 lines
161 KiB
C
5439 lines
161 KiB
C
/*
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* HTTP protocol analyzer
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*
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* Copyright 2000-2008 Willy Tarreau <w@1wt.eu>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <time.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <common/appsession.h>
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#include <common/compat.h>
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#include <common/config.h>
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#include <common/debug.h>
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#include <common/memory.h>
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#include <common/mini-clist.h>
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#include <common/standard.h>
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#include <common/ticks.h>
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#include <common/time.h>
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#include <common/uri_auth.h>
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#include <common/version.h>
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#include <types/capture.h>
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#include <types/global.h>
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#include <proto/acl.h>
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#include <proto/backend.h>
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#include <proto/buffers.h>
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#include <proto/client.h>
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#include <proto/dumpstats.h>
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#include <proto/fd.h>
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#include <proto/log.h>
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#include <proto/hdr_idx.h>
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#include <proto/proto_tcp.h>
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#include <proto/proto_http.h>
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#include <proto/proxy.h>
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#include <proto/queue.h>
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#include <proto/server.h>
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#include <proto/session.h>
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#include <proto/stream_interface.h>
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#include <proto/stream_sock.h>
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#include <proto/task.h>
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/* This is used by remote monitoring */
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const char HTTP_200[] =
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"HTTP/1.0 200 OK\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Content-Type: text/html\r\n"
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"\r\n"
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"<html><body><h1>200 OK</h1>\nHAProxy: service ready.\n</body></html>\n";
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const struct chunk http_200_chunk = {
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.str = (char *)&HTTP_200,
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.len = sizeof(HTTP_200)-1
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};
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const char *HTTP_301 =
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"HTTP/1.0 301 Moved Permantenly\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Location: "; /* not terminated since it will be concatenated with the URL */
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const char *HTTP_302 =
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"HTTP/1.0 302 Found\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Location: "; /* not terminated since it will be concatenated with the URL */
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/* same as 302 except that the browser MUST retry with the GET method */
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const char *HTTP_303 =
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"HTTP/1.0 303 See Other\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Location: "; /* not terminated since it will be concatenated with the URL */
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/* Warning: this one is an sprintf() fmt string, with <realm> as its only argument */
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const char *HTTP_401_fmt =
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"HTTP/1.0 401 Unauthorized\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Content-Type: text/html\r\n"
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"WWW-Authenticate: Basic realm=\"%s\"\r\n"
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"\r\n"
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"<html><body><h1>401 Unauthorized</h1>\nYou need a valid user and password to access this content.\n</body></html>\n";
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const int http_err_codes[HTTP_ERR_SIZE] = {
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[HTTP_ERR_400] = 400,
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[HTTP_ERR_403] = 403,
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[HTTP_ERR_408] = 408,
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[HTTP_ERR_500] = 500,
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[HTTP_ERR_502] = 502,
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[HTTP_ERR_503] = 503,
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[HTTP_ERR_504] = 504,
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};
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static const char *http_err_msgs[HTTP_ERR_SIZE] = {
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[HTTP_ERR_400] =
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"HTTP/1.0 400 Bad request\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Content-Type: text/html\r\n"
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"\r\n"
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"<html><body><h1>400 Bad request</h1>\nYour browser sent an invalid request.\n</body></html>\n",
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[HTTP_ERR_403] =
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"HTTP/1.0 403 Forbidden\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Content-Type: text/html\r\n"
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"\r\n"
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"<html><body><h1>403 Forbidden</h1>\nRequest forbidden by administrative rules.\n</body></html>\n",
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[HTTP_ERR_408] =
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"HTTP/1.0 408 Request Time-out\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Content-Type: text/html\r\n"
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"\r\n"
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"<html><body><h1>408 Request Time-out</h1>\nYour browser didn't send a complete request in time.\n</body></html>\n",
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[HTTP_ERR_500] =
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"HTTP/1.0 500 Server Error\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Content-Type: text/html\r\n"
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"\r\n"
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"<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n",
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[HTTP_ERR_502] =
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"HTTP/1.0 502 Bad Gateway\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Content-Type: text/html\r\n"
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"\r\n"
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"<html><body><h1>502 Bad Gateway</h1>\nThe server returned an invalid or incomplete response.\n</body></html>\n",
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[HTTP_ERR_503] =
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"HTTP/1.0 503 Service Unavailable\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Content-Type: text/html\r\n"
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"\r\n"
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"<html><body><h1>503 Service Unavailable</h1>\nNo server is available to handle this request.\n</body></html>\n",
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[HTTP_ERR_504] =
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"HTTP/1.0 504 Gateway Time-out\r\n"
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"Cache-Control: no-cache\r\n"
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"Connection: close\r\n"
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"Content-Type: text/html\r\n"
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"\r\n"
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"<html><body><h1>504 Gateway Time-out</h1>\nThe server didn't respond in time.\n</body></html>\n",
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};
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/* We must put the messages here since GCC cannot initialize consts depending
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* on strlen().
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*/
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struct chunk http_err_chunks[HTTP_ERR_SIZE];
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#define FD_SETS_ARE_BITFIELDS
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#ifdef FD_SETS_ARE_BITFIELDS
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/*
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* This map is used with all the FD_* macros to check whether a particular bit
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* is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes
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* which should be encoded. When FD_ISSET() returns non-zero, it means that the
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* byte should be encoded. Be careful to always pass bytes from 0 to 255
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* exclusively to the macros.
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*/
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fd_set hdr_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
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fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
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#else
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#error "Check if your OS uses bitfields for fd_sets"
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#endif
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void init_proto_http()
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{
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int i;
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char *tmp;
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int msg;
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for (msg = 0; msg < HTTP_ERR_SIZE; msg++) {
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if (!http_err_msgs[msg]) {
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Alert("Internal error: no message defined for HTTP return code %d. Aborting.\n", msg);
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abort();
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}
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http_err_chunks[msg].str = (char *)http_err_msgs[msg];
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http_err_chunks[msg].len = strlen(http_err_msgs[msg]);
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}
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/* initialize the log header encoding map : '{|}"#' should be encoded with
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* '#' as prefix, as well as non-printable characters ( <32 or >= 127 ).
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* URL encoding only requires '"', '#' to be encoded as well as non-
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* printable characters above.
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*/
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memset(hdr_encode_map, 0, sizeof(hdr_encode_map));
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memset(url_encode_map, 0, sizeof(url_encode_map));
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for (i = 0; i < 32; i++) {
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FD_SET(i, hdr_encode_map);
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FD_SET(i, url_encode_map);
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}
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for (i = 127; i < 256; i++) {
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FD_SET(i, hdr_encode_map);
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FD_SET(i, url_encode_map);
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}
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tmp = "\"#{|}";
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while (*tmp) {
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FD_SET(*tmp, hdr_encode_map);
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tmp++;
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}
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tmp = "\"#";
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while (*tmp) {
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FD_SET(*tmp, url_encode_map);
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tmp++;
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}
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/* memory allocations */
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pool2_requri = create_pool("requri", REQURI_LEN, MEM_F_SHARED);
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pool2_capture = create_pool("capture", CAPTURE_LEN, MEM_F_SHARED);
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}
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/*
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* We have 26 list of methods (1 per first letter), each of which can have
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* up to 3 entries (2 valid, 1 null).
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*/
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struct http_method_desc {
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http_meth_t meth;
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int len;
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const char text[8];
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};
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const struct http_method_desc http_methods[26][3] = {
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['C' - 'A'] = {
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[0] = { .meth = HTTP_METH_CONNECT , .len=7, .text="CONNECT" },
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},
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['D' - 'A'] = {
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[0] = { .meth = HTTP_METH_DELETE , .len=6, .text="DELETE" },
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},
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['G' - 'A'] = {
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[0] = { .meth = HTTP_METH_GET , .len=3, .text="GET" },
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},
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['H' - 'A'] = {
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[0] = { .meth = HTTP_METH_HEAD , .len=4, .text="HEAD" },
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},
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['P' - 'A'] = {
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[0] = { .meth = HTTP_METH_POST , .len=4, .text="POST" },
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[1] = { .meth = HTTP_METH_PUT , .len=3, .text="PUT" },
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},
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['T' - 'A'] = {
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[0] = { .meth = HTTP_METH_TRACE , .len=5, .text="TRACE" },
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},
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/* rest is empty like this :
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* [1] = { .meth = HTTP_METH_NONE , .len=0, .text="" },
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*/
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};
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/* It is about twice as fast on recent architectures to lookup a byte in a
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* table than to perform a boolean AND or OR between two tests. Refer to
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* RFC2616 for those chars.
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*/
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const char http_is_spht[256] = {
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[' '] = 1, ['\t'] = 1,
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};
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const char http_is_crlf[256] = {
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['\r'] = 1, ['\n'] = 1,
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};
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const char http_is_lws[256] = {
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[' '] = 1, ['\t'] = 1,
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['\r'] = 1, ['\n'] = 1,
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};
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const char http_is_sep[256] = {
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['('] = 1, [')'] = 1, ['<'] = 1, ['>'] = 1,
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['@'] = 1, [','] = 1, [';'] = 1, [':'] = 1,
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['"'] = 1, ['/'] = 1, ['['] = 1, [']'] = 1,
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['{'] = 1, ['}'] = 1, ['?'] = 1, ['='] = 1,
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[' '] = 1, ['\t'] = 1, ['\\'] = 1,
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};
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const char http_is_ctl[256] = {
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[0 ... 31] = 1,
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[127] = 1,
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};
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/*
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* A token is any ASCII char that is neither a separator nor a CTL char.
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* Do not overwrite values in assignment since gcc-2.95 will not handle
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* them correctly. Instead, define every non-CTL char's status.
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*/
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const char http_is_token[256] = {
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[' '] = 0, ['!'] = 1, ['"'] = 0, ['#'] = 1,
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['$'] = 1, ['%'] = 1, ['&'] = 1, ['\''] = 1,
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['('] = 0, [')'] = 0, ['*'] = 1, ['+'] = 1,
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[','] = 0, ['-'] = 1, ['.'] = 1, ['/'] = 0,
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['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1,
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['4'] = 1, ['5'] = 1, ['6'] = 1, ['7'] = 1,
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['8'] = 1, ['9'] = 1, [':'] = 0, [';'] = 0,
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['<'] = 0, ['='] = 0, ['>'] = 0, ['?'] = 0,
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['@'] = 0, ['A'] = 1, ['B'] = 1, ['C'] = 1,
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['D'] = 1, ['E'] = 1, ['F'] = 1, ['G'] = 1,
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['H'] = 1, ['I'] = 1, ['J'] = 1, ['K'] = 1,
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['L'] = 1, ['M'] = 1, ['N'] = 1, ['O'] = 1,
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['P'] = 1, ['Q'] = 1, ['R'] = 1, ['S'] = 1,
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['T'] = 1, ['U'] = 1, ['V'] = 1, ['W'] = 1,
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['X'] = 1, ['Y'] = 1, ['Z'] = 1, ['['] = 0,
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['\\'] = 0, [']'] = 0, ['^'] = 1, ['_'] = 1,
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['`'] = 1, ['a'] = 1, ['b'] = 1, ['c'] = 1,
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['d'] = 1, ['e'] = 1, ['f'] = 1, ['g'] = 1,
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['h'] = 1, ['i'] = 1, ['j'] = 1, ['k'] = 1,
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['l'] = 1, ['m'] = 1, ['n'] = 1, ['o'] = 1,
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['p'] = 1, ['q'] = 1, ['r'] = 1, ['s'] = 1,
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['t'] = 1, ['u'] = 1, ['v'] = 1, ['w'] = 1,
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['x'] = 1, ['y'] = 1, ['z'] = 1, ['{'] = 0,
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['|'] = 1, ['}'] = 0, ['~'] = 1,
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};
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/*
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* An http ver_token is any ASCII which can be found in an HTTP version,
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* which includes 'H', 'T', 'P', '/', '.' and any digit.
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*/
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const char http_is_ver_token[256] = {
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['.'] = 1, ['/'] = 1,
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['0'] = 1, ['1'] = 1, ['2'] = 1, ['3'] = 1, ['4'] = 1,
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['5'] = 1, ['6'] = 1, ['7'] = 1, ['8'] = 1, ['9'] = 1,
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['H'] = 1, ['P'] = 1, ['T'] = 1,
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};
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/*
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* Adds a header and its CRLF at the tail of buffer <b>, just before the last
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* CRLF. Text length is measured first, so it cannot be NULL.
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* The header is also automatically added to the index <hdr_idx>, and the end
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* of headers is automatically adjusted. The number of bytes added is returned
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* on success, otherwise <0 is returned indicating an error.
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*/
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int http_header_add_tail(struct buffer *b, struct http_msg *msg,
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struct hdr_idx *hdr_idx, const char *text)
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{
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int bytes, len;
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len = strlen(text);
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bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
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if (!bytes)
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return -1;
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msg->eoh += bytes;
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return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
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}
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/*
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* Adds a header and its CRLF at the tail of buffer <b>, just before the last
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* CRLF. <len> bytes are copied, not counting the CRLF. If <text> is NULL, then
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* the buffer is only opened and the space reserved, but nothing is copied.
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* The header is also automatically added to the index <hdr_idx>, and the end
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* of headers is automatically adjusted. The number of bytes added is returned
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* on success, otherwise <0 is returned indicating an error.
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*/
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int http_header_add_tail2(struct buffer *b, struct http_msg *msg,
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struct hdr_idx *hdr_idx, const char *text, int len)
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{
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int bytes;
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bytes = buffer_insert_line2(b, b->data + msg->eoh, text, len);
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if (!bytes)
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return -1;
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msg->eoh += bytes;
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return hdr_idx_add(len, 1, hdr_idx, hdr_idx->tail);
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}
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/*
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* Checks if <hdr> is exactly <name> for <len> chars, and ends with a colon.
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* If so, returns the position of the first non-space character relative to
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* <hdr>, or <end>-<hdr> if not found before. If no value is found, it tries
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* to return a pointer to the place after the first space. Returns 0 if the
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* header name does not match. Checks are case-insensitive.
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*/
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int http_header_match2(const char *hdr, const char *end,
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const char *name, int len)
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{
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const char *val;
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if (hdr + len >= end)
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return 0;
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if (hdr[len] != ':')
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return 0;
|
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if (strncasecmp(hdr, name, len) != 0)
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return 0;
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val = hdr + len + 1;
|
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while (val < end && HTTP_IS_SPHT(*val))
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val++;
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if ((val >= end) && (len + 2 <= end - hdr))
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return len + 2; /* we may replace starting from second space */
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return val - hdr;
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}
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/* Find the end of the header value contained between <s> and <e>.
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* See RFC2616, par 2.2 for more information. Note that it requires
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* a valid header to return a valid result.
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*/
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const char *find_hdr_value_end(const char *s, const char *e)
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{
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int quoted, qdpair;
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quoted = qdpair = 0;
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for (; s < e; s++) {
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if (qdpair) qdpair = 0;
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else if (quoted && *s == '\\') qdpair = 1;
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else if (quoted && *s == '"') quoted = 0;
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else if (*s == '"') quoted = 1;
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else if (*s == ',') return s;
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}
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return s;
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}
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/* Find the first or next occurrence of header <name> in message buffer <sol>
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* using headers index <idx>, and return it in the <ctx> structure. This
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* structure holds everything necessary to use the header and find next
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* occurrence. If its <idx> member is 0, the header is searched from the
|
|
* beginning. Otherwise, the next occurrence is returned. The function returns
|
|
* 1 when it finds a value, and 0 when there is no more.
|
|
*/
|
|
int http_find_header2(const char *name, int len,
|
|
const char *sol, struct hdr_idx *idx,
|
|
struct hdr_ctx *ctx)
|
|
{
|
|
const char *eol, *sov;
|
|
int cur_idx;
|
|
|
|
if (ctx->idx) {
|
|
/* We have previously returned a value, let's search
|
|
* another one on the same line.
|
|
*/
|
|
cur_idx = ctx->idx;
|
|
sol = ctx->line;
|
|
sov = sol + ctx->val + ctx->vlen;
|
|
eol = sol + idx->v[cur_idx].len;
|
|
|
|
if (sov >= eol)
|
|
/* no more values in this header */
|
|
goto next_hdr;
|
|
|
|
/* values remaining for this header, skip the comma */
|
|
sov++;
|
|
while (sov < eol && http_is_lws[(unsigned char)*sov])
|
|
sov++;
|
|
|
|
goto return_hdr;
|
|
}
|
|
|
|
/* first request for this header */
|
|
sol += hdr_idx_first_pos(idx);
|
|
cur_idx = hdr_idx_first_idx(idx);
|
|
|
|
while (cur_idx) {
|
|
eol = sol + idx->v[cur_idx].len;
|
|
|
|
if (len == 0) {
|
|
/* No argument was passed, we want any header.
|
|
* To achieve this, we simply build a fake request. */
|
|
while (sol + len < eol && sol[len] != ':')
|
|
len++;
|
|
name = sol;
|
|
}
|
|
|
|
if ((len < eol - sol) &&
|
|
(sol[len] == ':') &&
|
|
(strncasecmp(sol, name, len) == 0)) {
|
|
|
|
sov = sol + len + 1;
|
|
while (sov < eol && http_is_lws[(unsigned char)*sov])
|
|
sov++;
|
|
return_hdr:
|
|
ctx->line = sol;
|
|
ctx->idx = cur_idx;
|
|
ctx->val = sov - sol;
|
|
|
|
eol = find_hdr_value_end(sov, eol);
|
|
ctx->vlen = eol - sov;
|
|
return 1;
|
|
}
|
|
next_hdr:
|
|
sol = eol + idx->v[cur_idx].cr + 1;
|
|
cur_idx = idx->v[cur_idx].next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int http_find_header(const char *name,
|
|
const char *sol, struct hdr_idx *idx,
|
|
struct hdr_ctx *ctx)
|
|
{
|
|
return http_find_header2(name, strlen(name), sol, idx, ctx);
|
|
}
|
|
|
|
/* This function handles a server error at the stream interface level. The
|
|
* stream interface is assumed to be already in a closed state. An optional
|
|
* message is copied into the input buffer, and an HTTP status code stored.
|
|
* The error flags are set to the values in arguments. Any pending request
|
|
* in this buffer will be lost.
|
|
*/
|
|
static void http_server_error(struct session *t, struct stream_interface *si,
|
|
int err, int finst, int status, const struct chunk *msg)
|
|
{
|
|
buffer_erase(si->ob);
|
|
buffer_erase(si->ib);
|
|
buffer_auto_close(si->ib);
|
|
if (status > 0 && msg) {
|
|
t->txn.status = status;
|
|
buffer_write(si->ib, msg->str, msg->len);
|
|
}
|
|
if (!(t->flags & SN_ERR_MASK))
|
|
t->flags |= err;
|
|
if (!(t->flags & SN_FINST_MASK))
|
|
t->flags |= finst;
|
|
}
|
|
|
|
/* This function returns the appropriate error location for the given session
|
|
* and message.
|
|
*/
|
|
|
|
struct chunk *error_message(struct session *s, int msgnum)
|
|
{
|
|
if (s->be->errmsg[msgnum].str)
|
|
return &s->be->errmsg[msgnum];
|
|
else if (s->fe->errmsg[msgnum].str)
|
|
return &s->fe->errmsg[msgnum];
|
|
else
|
|
return &http_err_chunks[msgnum];
|
|
}
|
|
|
|
/*
|
|
* returns HTTP_METH_NONE if there is nothing valid to read (empty or non-text
|
|
* string), HTTP_METH_OTHER for unknown methods, or the identified method.
|
|
*/
|
|
static http_meth_t find_http_meth(const char *str, const int len)
|
|
{
|
|
unsigned char m;
|
|
const struct http_method_desc *h;
|
|
|
|
m = ((unsigned)*str - 'A');
|
|
|
|
if (m < 26) {
|
|
for (h = http_methods[m]; h->len > 0; h++) {
|
|
if (unlikely(h->len != len))
|
|
continue;
|
|
if (likely(memcmp(str, h->text, h->len) == 0))
|
|
return h->meth;
|
|
};
|
|
return HTTP_METH_OTHER;
|
|
}
|
|
return HTTP_METH_NONE;
|
|
|
|
}
|
|
|
|
/* Parse the URI from the given transaction (which is assumed to be in request
|
|
* phase) and look for the "/" beginning the PATH. If not found, return NULL.
|
|
* It is returned otherwise.
|
|
*/
|
|
static char *
|
|
http_get_path(struct http_txn *txn)
|
|
{
|
|
char *ptr, *end;
|
|
|
|
ptr = txn->req.sol + txn->req.sl.rq.u;
|
|
end = ptr + txn->req.sl.rq.u_l;
|
|
|
|
if (ptr >= end)
|
|
return NULL;
|
|
|
|
/* RFC2616, par. 5.1.2 :
|
|
* Request-URI = "*" | absuri | abspath | authority
|
|
*/
|
|
|
|
if (*ptr == '*')
|
|
return NULL;
|
|
|
|
if (isalpha((unsigned char)*ptr)) {
|
|
/* this is a scheme as described by RFC3986, par. 3.1 */
|
|
ptr++;
|
|
while (ptr < end &&
|
|
(isalnum((unsigned char)*ptr) || *ptr == '+' || *ptr == '-' || *ptr == '.'))
|
|
ptr++;
|
|
/* skip '://' */
|
|
if (ptr == end || *ptr++ != ':')
|
|
return NULL;
|
|
if (ptr == end || *ptr++ != '/')
|
|
return NULL;
|
|
if (ptr == end || *ptr++ != '/')
|
|
return NULL;
|
|
}
|
|
/* skip [user[:passwd]@]host[:[port]] */
|
|
|
|
while (ptr < end && *ptr != '/')
|
|
ptr++;
|
|
|
|
if (ptr == end)
|
|
return NULL;
|
|
|
|
/* OK, we got the '/' ! */
|
|
return ptr;
|
|
}
|
|
|
|
/* Returns a 302 for a redirectable request. This may only be called just after
|
|
* the stream interface has moved to SI_ST_ASS. Unprocessable requests are
|
|
* left unchanged and will follow normal proxy processing.
|
|
*/
|
|
void perform_http_redirect(struct session *s, struct stream_interface *si)
|
|
{
|
|
struct http_txn *txn;
|
|
struct chunk rdr;
|
|
char *path;
|
|
int len;
|
|
|
|
/* 1: create the response header */
|
|
rdr.len = strlen(HTTP_302);
|
|
rdr.str = trash;
|
|
memcpy(rdr.str, HTTP_302, rdr.len);
|
|
|
|
/* 2: add the server's prefix */
|
|
if (rdr.len + s->srv->rdr_len > rdr.size)
|
|
return;
|
|
|
|
memcpy(rdr.str + rdr.len, s->srv->rdr_pfx, s->srv->rdr_len);
|
|
rdr.len += s->srv->rdr_len;
|
|
|
|
/* 3: add the request URI */
|
|
txn = &s->txn;
|
|
path = http_get_path(txn);
|
|
if (!path)
|
|
return;
|
|
|
|
len = txn->req.sl.rq.u_l + (txn->req.sol+txn->req.sl.rq.u) - path;
|
|
if (rdr.len + len > rdr.size - 4) /* 4 for CRLF-CRLF */
|
|
return;
|
|
|
|
memcpy(rdr.str + rdr.len, path, len);
|
|
rdr.len += len;
|
|
memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
|
|
rdr.len += 4;
|
|
|
|
/* prepare to return without error. */
|
|
si->shutr(si);
|
|
si->shutw(si);
|
|
si->err_type = SI_ET_NONE;
|
|
si->err_loc = NULL;
|
|
si->state = SI_ST_CLO;
|
|
|
|
/* send the message */
|
|
http_server_error(s, si, SN_ERR_PRXCOND, SN_FINST_C, 302, &rdr);
|
|
|
|
/* FIXME: we should increase a counter of redirects per server and per backend. */
|
|
if (s->srv)
|
|
srv_inc_sess_ctr(s->srv);
|
|
}
|
|
|
|
/* Return the error message corresponding to si->err_type. It is assumed
|
|
* that the server side is closed. Note that err_type is actually a
|
|
* bitmask, where almost only aborts may be cumulated with other
|
|
* values. We consider that aborted operations are more important
|
|
* than timeouts or errors due to the fact that nobody else in the
|
|
* logs might explain incomplete retries. All others should avoid
|
|
* being cumulated. It should normally not be possible to have multiple
|
|
* aborts at once, but just in case, the first one in sequence is reported.
|
|
*/
|
|
void http_return_srv_error(struct session *s, struct stream_interface *si)
|
|
{
|
|
int err_type = si->err_type;
|
|
|
|
if (err_type & SI_ET_QUEUE_ABRT)
|
|
http_server_error(s, si, SN_ERR_CLICL, SN_FINST_Q,
|
|
503, error_message(s, HTTP_ERR_503));
|
|
else if (err_type & SI_ET_CONN_ABRT)
|
|
http_server_error(s, si, SN_ERR_CLICL, SN_FINST_C,
|
|
503, error_message(s, HTTP_ERR_503));
|
|
else if (err_type & SI_ET_QUEUE_TO)
|
|
http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_Q,
|
|
503, error_message(s, HTTP_ERR_503));
|
|
else if (err_type & SI_ET_QUEUE_ERR)
|
|
http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_Q,
|
|
503, error_message(s, HTTP_ERR_503));
|
|
else if (err_type & SI_ET_CONN_TO)
|
|
http_server_error(s, si, SN_ERR_SRVTO, SN_FINST_C,
|
|
503, error_message(s, HTTP_ERR_503));
|
|
else if (err_type & SI_ET_CONN_ERR)
|
|
http_server_error(s, si, SN_ERR_SRVCL, SN_FINST_C,
|
|
503, error_message(s, HTTP_ERR_503));
|
|
else /* SI_ET_CONN_OTHER and others */
|
|
http_server_error(s, si, SN_ERR_INTERNAL, SN_FINST_C,
|
|
500, error_message(s, HTTP_ERR_500));
|
|
}
|
|
|
|
extern const char sess_term_cond[8];
|
|
extern const char sess_fin_state[8];
|
|
extern const char *monthname[12];
|
|
const char sess_cookie[4] = "NIDV"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie */
|
|
const char sess_set_cookie[8] = "N1I3PD5R"; /* No set-cookie, unknown, Set-Cookie Inserted, unknown,
|
|
Set-cookie seen and left unchanged (passive), Set-cookie Deleted,
|
|
unknown, Set-cookie Rewritten */
|
|
struct pool_head *pool2_requri;
|
|
struct pool_head *pool2_capture;
|
|
|
|
void http_sess_clflog(struct session *s)
|
|
{
|
|
char pn[INET6_ADDRSTRLEN + strlen(":65535")];
|
|
struct proxy *fe = s->fe;
|
|
struct proxy *be = s->be;
|
|
struct proxy *prx_log;
|
|
struct http_txn *txn = &s->txn;
|
|
int tolog, level, err;
|
|
char *uri, *h;
|
|
char *svid;
|
|
struct tm tm;
|
|
static char tmpline[MAX_SYSLOG_LEN];
|
|
int hdr;
|
|
size_t w;
|
|
int t_request;
|
|
|
|
prx_log = fe;
|
|
err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
|
|
(s->conn_retries != be->conn_retries) ||
|
|
txn->status >= 500;
|
|
|
|
if (s->cli_addr.ss_family == AF_INET)
|
|
inet_ntop(AF_INET,
|
|
(const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
|
|
pn, sizeof(pn));
|
|
else
|
|
inet_ntop(AF_INET6,
|
|
(const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
|
|
pn, sizeof(pn));
|
|
|
|
get_gmtime(s->logs.accept_date.tv_sec, &tm);
|
|
|
|
/* FIXME: let's limit ourselves to frontend logging for now. */
|
|
tolog = fe->to_log;
|
|
|
|
h = tmpline;
|
|
|
|
w = snprintf(h, sizeof(tmpline),
|
|
"%s - - [%02d/%s/%04d:%02d:%02d:%02d +0000]",
|
|
pn,
|
|
tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
|
|
tm.tm_hour, tm.tm_min, tm.tm_sec);
|
|
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
|
|
goto trunc;
|
|
h += w;
|
|
|
|
if (h >= tmpline + sizeof(tmpline) - 4)
|
|
goto trunc;
|
|
|
|
*(h++) = ' ';
|
|
*(h++) = '\"';
|
|
uri = txn->uri ? txn->uri : "<BADREQ>";
|
|
h = encode_string(h, tmpline + sizeof(tmpline) - 1,
|
|
'#', url_encode_map, uri);
|
|
*(h++) = '\"';
|
|
|
|
w = snprintf(h, sizeof(tmpline) - (h - tmpline), " %d %lld", txn->status, s->logs.bytes_out);
|
|
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
|
|
goto trunc;
|
|
h += w;
|
|
|
|
if (h >= tmpline + sizeof(tmpline) - 9)
|
|
goto trunc;
|
|
memcpy(h, " \"-\" \"-\"", 8);
|
|
h += 8;
|
|
|
|
w = snprintf(h, sizeof(tmpline) - (h - tmpline),
|
|
" %d %03d",
|
|
(s->cli_addr.ss_family == AF_INET) ?
|
|
ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
|
|
ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
|
|
(int)s->logs.accept_date.tv_usec/1000);
|
|
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
|
|
goto trunc;
|
|
h += w;
|
|
|
|
w = strlen(fe->id);
|
|
if (h >= tmpline + sizeof(tmpline) - 4 - w)
|
|
goto trunc;
|
|
*(h++) = ' ';
|
|
*(h++) = '\"';
|
|
memcpy(h, fe->id, w);
|
|
h += w;
|
|
*(h++) = '\"';
|
|
|
|
w = strlen(be->id);
|
|
if (h >= tmpline + sizeof(tmpline) - 4 - w)
|
|
goto trunc;
|
|
*(h++) = ' ';
|
|
*(h++) = '\"';
|
|
memcpy(h, be->id, w);
|
|
h += w;
|
|
*(h++) = '\"';
|
|
|
|
svid = (tolog & LW_SVID) ?
|
|
(s->data_source != DATA_SRC_STATS) ?
|
|
(s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
|
|
|
|
w = strlen(svid);
|
|
if (h >= tmpline + sizeof(tmpline) - 4 - w)
|
|
goto trunc;
|
|
*(h++) = ' ';
|
|
*(h++) = '\"';
|
|
memcpy(h, svid, w);
|
|
h += w;
|
|
*(h++) = '\"';
|
|
|
|
t_request = -1;
|
|
if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
|
|
t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
|
|
w = snprintf(h, sizeof(tmpline) - (h - tmpline),
|
|
" %d %ld %ld %ld %ld",
|
|
t_request,
|
|
(s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
|
|
(s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
|
|
(s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
|
|
s->logs.t_close);
|
|
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
|
|
goto trunc;
|
|
h += w;
|
|
|
|
if (h >= tmpline + sizeof(tmpline) - 8)
|
|
goto trunc;
|
|
*(h++) = ' ';
|
|
*(h++) = '\"';
|
|
*(h++) = sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT];
|
|
*(h++) = sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT];
|
|
*(h++) = (be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
|
|
*(h++) = (be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-';
|
|
*(h++) = '\"';
|
|
|
|
w = snprintf(h, sizeof(tmpline) - (h - tmpline),
|
|
" %d %d %d %d %d %ld %ld",
|
|
actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
|
|
(s->conn_retries > 0) ? (be->conn_retries - s->conn_retries) : be->conn_retries,
|
|
s->logs.srv_queue_size, s->logs.prx_queue_size);
|
|
|
|
if (w < 0 || w >= sizeof(tmpline) - (h - tmpline))
|
|
goto trunc;
|
|
h += w;
|
|
|
|
if (txn->cli_cookie) {
|
|
w = strlen(txn->cli_cookie);
|
|
if (h >= tmpline + sizeof(tmpline) - 4 - w)
|
|
goto trunc;
|
|
*(h++) = ' ';
|
|
*(h++) = '\"';
|
|
memcpy(h, txn->cli_cookie, w);
|
|
h += w;
|
|
*(h++) = '\"';
|
|
} else {
|
|
if (h >= tmpline + sizeof(tmpline) - 5)
|
|
goto trunc;
|
|
memcpy(h, " \"-\"", 4);
|
|
h += 4;
|
|
}
|
|
|
|
if (txn->srv_cookie) {
|
|
w = strlen(txn->srv_cookie);
|
|
if (h >= tmpline + sizeof(tmpline) - 4 - w)
|
|
goto trunc;
|
|
*(h++) = ' ';
|
|
*(h++) = '\"';
|
|
memcpy(h, txn->srv_cookie, w);
|
|
h += w;
|
|
*(h++) = '\"';
|
|
} else {
|
|
if (h >= tmpline + sizeof(tmpline) - 5)
|
|
goto trunc;
|
|
memcpy(h, " \"-\"", 4);
|
|
h += 4;
|
|
}
|
|
|
|
if ((fe->to_log & LW_REQHDR) && txn->req.cap) {
|
|
for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
|
|
if (h >= sizeof (tmpline) + tmpline - 4)
|
|
goto trunc;
|
|
*(h++) = ' ';
|
|
*(h++) = '\"';
|
|
h = encode_string(h, tmpline + sizeof(tmpline) - 2,
|
|
'#', hdr_encode_map, txn->req.cap[hdr]);
|
|
*(h++) = '\"';
|
|
}
|
|
}
|
|
|
|
if ((fe->to_log & LW_RSPHDR) && txn->rsp.cap) {
|
|
for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
|
|
if (h >= sizeof (tmpline) + tmpline - 4)
|
|
goto trunc;
|
|
*(h++) = ' ';
|
|
*(h++) = '\"';
|
|
h = encode_string(h, tmpline + sizeof(tmpline) - 2,
|
|
'#', hdr_encode_map, txn->rsp.cap[hdr]);
|
|
*(h++) = '\"';
|
|
}
|
|
}
|
|
|
|
trunc:
|
|
*h = '\0';
|
|
|
|
level = LOG_INFO;
|
|
if (err && (fe->options2 & PR_O2_LOGERRORS))
|
|
level = LOG_ERR;
|
|
|
|
send_log(prx_log, level, "%s\n", tmpline);
|
|
|
|
s->logs.logwait = 0;
|
|
}
|
|
|
|
/*
|
|
* send a log for the session when we have enough info about it.
|
|
* Will not log if the frontend has no log defined.
|
|
*/
|
|
void http_sess_log(struct session *s)
|
|
{
|
|
char pn[INET6_ADDRSTRLEN + strlen(":65535")];
|
|
struct proxy *fe = s->fe;
|
|
struct proxy *be = s->be;
|
|
struct proxy *prx_log;
|
|
struct http_txn *txn = &s->txn;
|
|
int tolog, level, err;
|
|
char *uri, *h;
|
|
char *svid;
|
|
struct tm tm;
|
|
static char tmpline[MAX_SYSLOG_LEN];
|
|
int t_request;
|
|
int hdr;
|
|
|
|
/* if we don't want to log normal traffic, return now */
|
|
err = (s->flags & (SN_ERR_MASK | SN_REDISP)) ||
|
|
(s->conn_retries != be->conn_retries) ||
|
|
txn->status >= 500;
|
|
if (!err && (fe->options2 & PR_O2_NOLOGNORM))
|
|
return;
|
|
|
|
if (fe->logfac1 < 0 && fe->logfac2 < 0)
|
|
return;
|
|
prx_log = fe;
|
|
|
|
if (prx_log->options2 & PR_O2_CLFLOG)
|
|
return http_sess_clflog(s);
|
|
|
|
if (s->cli_addr.ss_family == AF_INET)
|
|
inet_ntop(AF_INET,
|
|
(const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
|
|
pn, sizeof(pn));
|
|
else
|
|
inet_ntop(AF_INET6,
|
|
(const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
|
|
pn, sizeof(pn));
|
|
|
|
get_localtime(s->logs.accept_date.tv_sec, &tm);
|
|
|
|
/* FIXME: let's limit ourselves to frontend logging for now. */
|
|
tolog = fe->to_log;
|
|
|
|
h = tmpline;
|
|
if (fe->to_log & LW_REQHDR &&
|
|
txn->req.cap &&
|
|
(h < tmpline + sizeof(tmpline) - 10)) {
|
|
*(h++) = ' ';
|
|
*(h++) = '{';
|
|
for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
|
|
if (hdr)
|
|
*(h++) = '|';
|
|
if (txn->req.cap[hdr] != NULL)
|
|
h = encode_string(h, tmpline + sizeof(tmpline) - 7,
|
|
'#', hdr_encode_map, txn->req.cap[hdr]);
|
|
}
|
|
*(h++) = '}';
|
|
}
|
|
|
|
if (fe->to_log & LW_RSPHDR &&
|
|
txn->rsp.cap &&
|
|
(h < tmpline + sizeof(tmpline) - 7)) {
|
|
*(h++) = ' ';
|
|
*(h++) = '{';
|
|
for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
|
|
if (hdr)
|
|
*(h++) = '|';
|
|
if (txn->rsp.cap[hdr] != NULL)
|
|
h = encode_string(h, tmpline + sizeof(tmpline) - 4,
|
|
'#', hdr_encode_map, txn->rsp.cap[hdr]);
|
|
}
|
|
*(h++) = '}';
|
|
}
|
|
|
|
if (h < tmpline + sizeof(tmpline) - 4) {
|
|
*(h++) = ' ';
|
|
*(h++) = '"';
|
|
uri = txn->uri ? txn->uri : "<BADREQ>";
|
|
h = encode_string(h, tmpline + sizeof(tmpline) - 1,
|
|
'#', url_encode_map, uri);
|
|
*(h++) = '"';
|
|
}
|
|
*h = '\0';
|
|
|
|
svid = (tolog & LW_SVID) ?
|
|
(s->data_source != DATA_SRC_STATS) ?
|
|
(s->srv != NULL) ? s->srv->id : "<NOSRV>" : "<STATS>" : "-";
|
|
|
|
t_request = -1;
|
|
if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
|
|
t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
|
|
|
|
level = LOG_INFO;
|
|
if (err && (fe->options2 & PR_O2_LOGERRORS))
|
|
level = LOG_ERR;
|
|
|
|
send_log(prx_log, level,
|
|
"%s:%d [%02d/%s/%04d:%02d:%02d:%02d.%03d]"
|
|
" %s %s/%s %d/%ld/%ld/%ld/%s%ld %d %s%lld"
|
|
" %s %s %c%c%c%c %d/%d/%d/%d/%s%u %ld/%ld%s\n",
|
|
pn,
|
|
(s->cli_addr.ss_family == AF_INET) ?
|
|
ntohs(((struct sockaddr_in *)&s->cli_addr)->sin_port) :
|
|
ntohs(((struct sockaddr_in6 *)&s->cli_addr)->sin6_port),
|
|
tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
|
|
tm.tm_hour, tm.tm_min, tm.tm_sec, (int)s->logs.accept_date.tv_usec/1000,
|
|
fe->id, be->id, svid,
|
|
t_request,
|
|
(s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
|
|
(s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
|
|
(s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
|
|
(tolog & LW_BYTES) ? "" : "+", s->logs.t_close,
|
|
txn->status,
|
|
(tolog & LW_BYTES) ? "" : "+", s->logs.bytes_out,
|
|
txn->cli_cookie ? txn->cli_cookie : "-",
|
|
txn->srv_cookie ? txn->srv_cookie : "-",
|
|
sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT],
|
|
sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT],
|
|
(be->options & PR_O_COOK_ANY) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-',
|
|
(be->options & PR_O_COOK_ANY) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-',
|
|
actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
|
|
(s->flags & SN_REDISP)?"+":"",
|
|
(s->conn_retries>0)?(be->conn_retries - s->conn_retries):be->conn_retries,
|
|
s->logs.srv_queue_size, s->logs.prx_queue_size, tmpline);
|
|
|
|
s->logs.logwait = 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Capture headers from message starting at <som> according to header list
|
|
* <cap_hdr>, and fill the <idx> structure appropriately.
|
|
*/
|
|
void capture_headers(char *som, struct hdr_idx *idx,
|
|
char **cap, struct cap_hdr *cap_hdr)
|
|
{
|
|
char *eol, *sol, *col, *sov;
|
|
int cur_idx;
|
|
struct cap_hdr *h;
|
|
int len;
|
|
|
|
sol = som + hdr_idx_first_pos(idx);
|
|
cur_idx = hdr_idx_first_idx(idx);
|
|
|
|
while (cur_idx) {
|
|
eol = sol + idx->v[cur_idx].len;
|
|
|
|
col = sol;
|
|
while (col < eol && *col != ':')
|
|
col++;
|
|
|
|
sov = col + 1;
|
|
while (sov < eol && http_is_lws[(unsigned char)*sov])
|
|
sov++;
|
|
|
|
for (h = cap_hdr; h; h = h->next) {
|
|
if ((h->namelen == col - sol) &&
|
|
(strncasecmp(sol, h->name, h->namelen) == 0)) {
|
|
if (cap[h->index] == NULL)
|
|
cap[h->index] =
|
|
pool_alloc2(h->pool);
|
|
|
|
if (cap[h->index] == NULL) {
|
|
Alert("HTTP capture : out of memory.\n");
|
|
continue;
|
|
}
|
|
|
|
len = eol - sov;
|
|
if (len > h->len)
|
|
len = h->len;
|
|
|
|
memcpy(cap[h->index], sov, len);
|
|
cap[h->index][len]=0;
|
|
}
|
|
}
|
|
sol = eol + idx->v[cur_idx].cr + 1;
|
|
cur_idx = idx->v[cur_idx].next;
|
|
}
|
|
}
|
|
|
|
|
|
/* either we find an LF at <ptr> or we jump to <bad>.
|
|
*/
|
|
#define EXPECT_LF_HERE(ptr, bad) do { if (unlikely(*(ptr) != '\n')) goto bad; } while (0)
|
|
|
|
/* plays with variables <ptr>, <end> and <state>. Jumps to <good> if OK,
|
|
* otherwise to <http_msg_ood> with <state> set to <st>.
|
|
*/
|
|
#define EAT_AND_JUMP_OR_RETURN(good, st) do { \
|
|
ptr++; \
|
|
if (likely(ptr < end)) \
|
|
goto good; \
|
|
else { \
|
|
state = (st); \
|
|
goto http_msg_ood; \
|
|
} \
|
|
} while (0)
|
|
|
|
|
|
/*
|
|
* This function parses a status line between <ptr> and <end>, starting with
|
|
* parser state <state>. Only states HTTP_MSG_RPVER, HTTP_MSG_RPVER_SP,
|
|
* HTTP_MSG_RPCODE, HTTP_MSG_RPCODE_SP and HTTP_MSG_RPREASON are handled. Others
|
|
* will give undefined results.
|
|
* Note that it is upon the caller's responsibility to ensure that ptr < end,
|
|
* and that msg->sol points to the beginning of the response.
|
|
* If a complete line is found (which implies that at least one CR or LF is
|
|
* found before <end>, the updated <ptr> is returned, otherwise NULL is
|
|
* returned indicating an incomplete line (which does not mean that parts have
|
|
* not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
|
|
* non-NULL, they are fed with the new <ptr> and <state> values to be passed
|
|
* upon next call.
|
|
*
|
|
* This function was intentionally designed to be called from
|
|
* http_msg_analyzer() with the lowest overhead. It should integrate perfectly
|
|
* within its state machine and use the same macros, hence the need for same
|
|
* labels and variable names. Note that msg->sol is left unchanged.
|
|
*/
|
|
const char *http_parse_stsline(struct http_msg *msg, const char *msg_buf,
|
|
unsigned int state, const char *ptr, const char *end,
|
|
char **ret_ptr, unsigned int *ret_state)
|
|
{
|
|
switch (state) {
|
|
http_msg_rpver:
|
|
case HTTP_MSG_RPVER:
|
|
if (likely(HTTP_IS_VER_TOKEN(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpver, HTTP_MSG_RPVER);
|
|
|
|
if (likely(HTTP_IS_SPHT(*ptr))) {
|
|
msg->sl.st.v_l = (ptr - msg_buf) - msg->som;
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
|
|
}
|
|
state = HTTP_MSG_ERROR;
|
|
break;
|
|
|
|
http_msg_rpver_sp:
|
|
case HTTP_MSG_RPVER_SP:
|
|
if (likely(!HTTP_IS_LWS(*ptr))) {
|
|
msg->sl.st.c = ptr - msg_buf;
|
|
goto http_msg_rpcode;
|
|
}
|
|
if (likely(HTTP_IS_SPHT(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpver_sp, HTTP_MSG_RPVER_SP);
|
|
/* so it's a CR/LF, this is invalid */
|
|
state = HTTP_MSG_ERROR;
|
|
break;
|
|
|
|
http_msg_rpcode:
|
|
case HTTP_MSG_RPCODE:
|
|
if (likely(!HTTP_IS_LWS(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpcode, HTTP_MSG_RPCODE);
|
|
|
|
if (likely(HTTP_IS_SPHT(*ptr))) {
|
|
msg->sl.st.c_l = (ptr - msg_buf) - msg->sl.st.c;
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
|
|
}
|
|
|
|
/* so it's a CR/LF, so there is no reason phrase */
|
|
msg->sl.st.c_l = (ptr - msg_buf) - msg->sl.st.c;
|
|
http_msg_rsp_reason:
|
|
/* FIXME: should we support HTTP responses without any reason phrase ? */
|
|
msg->sl.st.r = ptr - msg_buf;
|
|
msg->sl.st.r_l = 0;
|
|
goto http_msg_rpline_eol;
|
|
|
|
http_msg_rpcode_sp:
|
|
case HTTP_MSG_RPCODE_SP:
|
|
if (likely(!HTTP_IS_LWS(*ptr))) {
|
|
msg->sl.st.r = ptr - msg_buf;
|
|
goto http_msg_rpreason;
|
|
}
|
|
if (likely(HTTP_IS_SPHT(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpcode_sp, HTTP_MSG_RPCODE_SP);
|
|
/* so it's a CR/LF, so there is no reason phrase */
|
|
goto http_msg_rsp_reason;
|
|
|
|
http_msg_rpreason:
|
|
case HTTP_MSG_RPREASON:
|
|
if (likely(!HTTP_IS_CRLF(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpreason, HTTP_MSG_RPREASON);
|
|
msg->sl.st.r_l = (ptr - msg_buf) - msg->sl.st.r;
|
|
http_msg_rpline_eol:
|
|
/* We have seen the end of line. Note that we do not
|
|
* necessarily have the \n yet, but at least we know that we
|
|
* have EITHER \r OR \n, otherwise the response would not be
|
|
* complete. We can then record the response length and return
|
|
* to the caller which will be able to register it.
|
|
*/
|
|
msg->sl.st.l = ptr - msg->sol;
|
|
return ptr;
|
|
|
|
#ifdef DEBUG_FULL
|
|
default:
|
|
fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
|
|
exit(1);
|
|
#endif
|
|
}
|
|
|
|
http_msg_ood:
|
|
/* out of valid data */
|
|
if (ret_state)
|
|
*ret_state = state;
|
|
if (ret_ptr)
|
|
*ret_ptr = (char *)ptr;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* This function parses a request line between <ptr> and <end>, starting with
|
|
* parser state <state>. Only states HTTP_MSG_RQMETH, HTTP_MSG_RQMETH_SP,
|
|
* HTTP_MSG_RQURI, HTTP_MSG_RQURI_SP and HTTP_MSG_RQVER are handled. Others
|
|
* will give undefined results.
|
|
* Note that it is upon the caller's responsibility to ensure that ptr < end,
|
|
* and that msg->sol points to the beginning of the request.
|
|
* If a complete line is found (which implies that at least one CR or LF is
|
|
* found before <end>, the updated <ptr> is returned, otherwise NULL is
|
|
* returned indicating an incomplete line (which does not mean that parts have
|
|
* not been updated). In the incomplete case, if <ret_ptr> or <ret_state> are
|
|
* non-NULL, they are fed with the new <ptr> and <state> values to be passed
|
|
* upon next call.
|
|
*
|
|
* This function was intentionally designed to be called from
|
|
* http_msg_analyzer() with the lowest overhead. It should integrate perfectly
|
|
* within its state machine and use the same macros, hence the need for same
|
|
* labels and variable names. Note that msg->sol is left unchanged.
|
|
*/
|
|
const char *http_parse_reqline(struct http_msg *msg, const char *msg_buf,
|
|
unsigned int state, const char *ptr, const char *end,
|
|
char **ret_ptr, unsigned int *ret_state)
|
|
{
|
|
switch (state) {
|
|
http_msg_rqmeth:
|
|
case HTTP_MSG_RQMETH:
|
|
if (likely(HTTP_IS_TOKEN(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth, HTTP_MSG_RQMETH);
|
|
|
|
if (likely(HTTP_IS_SPHT(*ptr))) {
|
|
msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
|
|
}
|
|
|
|
if (likely(HTTP_IS_CRLF(*ptr))) {
|
|
/* HTTP 0.9 request */
|
|
msg->sl.rq.m_l = (ptr - msg_buf) - msg->som;
|
|
http_msg_req09_uri:
|
|
msg->sl.rq.u = ptr - msg_buf;
|
|
http_msg_req09_uri_e:
|
|
msg->sl.rq.u_l = (ptr - msg_buf) - msg->sl.rq.u;
|
|
http_msg_req09_ver:
|
|
msg->sl.rq.v = ptr - msg_buf;
|
|
msg->sl.rq.v_l = 0;
|
|
goto http_msg_rqline_eol;
|
|
}
|
|
state = HTTP_MSG_ERROR;
|
|
break;
|
|
|
|
http_msg_rqmeth_sp:
|
|
case HTTP_MSG_RQMETH_SP:
|
|
if (likely(!HTTP_IS_LWS(*ptr))) {
|
|
msg->sl.rq.u = ptr - msg_buf;
|
|
goto http_msg_rquri;
|
|
}
|
|
if (likely(HTTP_IS_SPHT(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rqmeth_sp, HTTP_MSG_RQMETH_SP);
|
|
/* so it's a CR/LF, meaning an HTTP 0.9 request */
|
|
goto http_msg_req09_uri;
|
|
|
|
http_msg_rquri:
|
|
case HTTP_MSG_RQURI:
|
|
if (likely(!HTTP_IS_LWS(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rquri, HTTP_MSG_RQURI);
|
|
|
|
if (likely(HTTP_IS_SPHT(*ptr))) {
|
|
msg->sl.rq.u_l = (ptr - msg_buf) - msg->sl.rq.u;
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
|
|
}
|
|
|
|
/* so it's a CR/LF, meaning an HTTP 0.9 request */
|
|
goto http_msg_req09_uri_e;
|
|
|
|
http_msg_rquri_sp:
|
|
case HTTP_MSG_RQURI_SP:
|
|
if (likely(!HTTP_IS_LWS(*ptr))) {
|
|
msg->sl.rq.v = ptr - msg_buf;
|
|
goto http_msg_rqver;
|
|
}
|
|
if (likely(HTTP_IS_SPHT(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rquri_sp, HTTP_MSG_RQURI_SP);
|
|
/* so it's a CR/LF, meaning an HTTP 0.9 request */
|
|
goto http_msg_req09_ver;
|
|
|
|
http_msg_rqver:
|
|
case HTTP_MSG_RQVER:
|
|
if (likely(HTTP_IS_VER_TOKEN(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rqver, HTTP_MSG_RQVER);
|
|
|
|
if (likely(HTTP_IS_CRLF(*ptr))) {
|
|
msg->sl.rq.v_l = (ptr - msg_buf) - msg->sl.rq.v;
|
|
http_msg_rqline_eol:
|
|
/* We have seen the end of line. Note that we do not
|
|
* necessarily have the \n yet, but at least we know that we
|
|
* have EITHER \r OR \n, otherwise the request would not be
|
|
* complete. We can then record the request length and return
|
|
* to the caller which will be able to register it.
|
|
*/
|
|
msg->sl.rq.l = ptr - msg->sol;
|
|
return ptr;
|
|
}
|
|
|
|
/* neither an HTTP_VER token nor a CRLF */
|
|
state = HTTP_MSG_ERROR;
|
|
break;
|
|
|
|
#ifdef DEBUG_FULL
|
|
default:
|
|
fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
|
|
exit(1);
|
|
#endif
|
|
}
|
|
|
|
http_msg_ood:
|
|
/* out of valid data */
|
|
if (ret_state)
|
|
*ret_state = state;
|
|
if (ret_ptr)
|
|
*ret_ptr = (char *)ptr;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* This function parses an HTTP message, either a request or a response,
|
|
* depending on the initial msg->msg_state. It can be preempted everywhere
|
|
* when data are missing and recalled at the exact same location with no
|
|
* information loss. The header index is re-initialized when switching from
|
|
* MSG_R[PQ]BEFORE to MSG_RPVER|MSG_RQMETH. It modifies msg->sol among other
|
|
* fields.
|
|
*/
|
|
void http_msg_analyzer(struct buffer *buf, struct http_msg *msg, struct hdr_idx *idx)
|
|
{
|
|
unsigned int state; /* updated only when leaving the FSM */
|
|
register char *ptr, *end; /* request pointers, to avoid dereferences */
|
|
|
|
state = msg->msg_state;
|
|
ptr = buf->lr;
|
|
end = buf->r;
|
|
|
|
if (unlikely(ptr >= end))
|
|
goto http_msg_ood;
|
|
|
|
switch (state) {
|
|
/*
|
|
* First, states that are specific to the response only.
|
|
* We check them first so that request and headers are
|
|
* closer to each other (accessed more often).
|
|
*/
|
|
http_msg_rpbefore:
|
|
case HTTP_MSG_RPBEFORE:
|
|
if (likely(HTTP_IS_TOKEN(*ptr))) {
|
|
#if !defined(PARSE_PRESERVE_EMPTY_LINES)
|
|
if (likely(ptr != buf->data)) {
|
|
/* Remove empty leading lines, as recommended by
|
|
* RFC2616. This takes a lot of time because we
|
|
* must move all the buffer backwards, but this
|
|
* is rarely needed. The method above will be
|
|
* cleaner when we'll be able to start sending
|
|
* the request from any place in the buffer.
|
|
*/
|
|
ptr += buffer_replace2(buf, buf->lr, ptr, NULL, 0);
|
|
end = buf->r;
|
|
}
|
|
#endif
|
|
msg->sol = ptr;
|
|
msg->som = ptr - buf->data;
|
|
hdr_idx_init(idx);
|
|
state = HTTP_MSG_RPVER;
|
|
goto http_msg_rpver;
|
|
}
|
|
|
|
if (unlikely(!HTTP_IS_CRLF(*ptr)))
|
|
goto http_msg_invalid;
|
|
|
|
if (unlikely(*ptr == '\n'))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore_cr, HTTP_MSG_RPBEFORE_CR);
|
|
/* stop here */
|
|
|
|
http_msg_rpbefore_cr:
|
|
case HTTP_MSG_RPBEFORE_CR:
|
|
EXPECT_LF_HERE(ptr, http_msg_invalid);
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpbefore, HTTP_MSG_RPBEFORE);
|
|
/* stop here */
|
|
|
|
http_msg_rpver:
|
|
case HTTP_MSG_RPVER:
|
|
case HTTP_MSG_RPVER_SP:
|
|
case HTTP_MSG_RPCODE:
|
|
case HTTP_MSG_RPCODE_SP:
|
|
case HTTP_MSG_RPREASON:
|
|
ptr = (char *)http_parse_stsline(msg, buf->data, state, ptr, end,
|
|
&buf->lr, &msg->msg_state);
|
|
if (unlikely(!ptr))
|
|
return;
|
|
|
|
/* we have a full response and we know that we have either a CR
|
|
* or an LF at <ptr>.
|
|
*/
|
|
//fprintf(stderr,"som=%d rq.l=%d *ptr=0x%02x\n", msg->som, msg->sl.st.l, *ptr);
|
|
hdr_idx_set_start(idx, msg->sl.st.l, *ptr == '\r');
|
|
|
|
msg->sol = ptr;
|
|
if (likely(*ptr == '\r'))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rpline_end, HTTP_MSG_RPLINE_END);
|
|
goto http_msg_rpline_end;
|
|
|
|
http_msg_rpline_end:
|
|
case HTTP_MSG_RPLINE_END:
|
|
/* msg->sol must point to the first of CR or LF. */
|
|
EXPECT_LF_HERE(ptr, http_msg_invalid);
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
|
|
/* stop here */
|
|
|
|
/*
|
|
* Second, states that are specific to the request only
|
|
*/
|
|
http_msg_rqbefore:
|
|
case HTTP_MSG_RQBEFORE:
|
|
if (likely(HTTP_IS_TOKEN(*ptr))) {
|
|
if (likely(ptr == buf->data)) {
|
|
msg->sol = ptr;
|
|
msg->som = 0;
|
|
} else {
|
|
#if PARSE_PRESERVE_EMPTY_LINES
|
|
/* only skip empty leading lines, don't remove them */
|
|
msg->sol = ptr;
|
|
msg->som = ptr - buf->data;
|
|
#else
|
|
/* Remove empty leading lines, as recommended by
|
|
* RFC2616. This takes a lot of time because we
|
|
* must move all the buffer backwards, but this
|
|
* is rarely needed. The method above will be
|
|
* cleaner when we'll be able to start sending
|
|
* the request from any place in the buffer.
|
|
*/
|
|
buf->lr = ptr;
|
|
buffer_replace2(buf, buf->data, buf->lr, NULL, 0);
|
|
msg->som = 0;
|
|
msg->sol = buf->data;
|
|
ptr = buf->data;
|
|
end = buf->r;
|
|
#endif
|
|
}
|
|
/* we will need this when keep-alive will be supported
|
|
hdr_idx_init(idx);
|
|
*/
|
|
state = HTTP_MSG_RQMETH;
|
|
goto http_msg_rqmeth;
|
|
}
|
|
|
|
if (unlikely(!HTTP_IS_CRLF(*ptr)))
|
|
goto http_msg_invalid;
|
|
|
|
if (unlikely(*ptr == '\n'))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore_cr, HTTP_MSG_RQBEFORE_CR);
|
|
/* stop here */
|
|
|
|
http_msg_rqbefore_cr:
|
|
case HTTP_MSG_RQBEFORE_CR:
|
|
EXPECT_LF_HERE(ptr, http_msg_invalid);
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rqbefore, HTTP_MSG_RQBEFORE);
|
|
/* stop here */
|
|
|
|
http_msg_rqmeth:
|
|
case HTTP_MSG_RQMETH:
|
|
case HTTP_MSG_RQMETH_SP:
|
|
case HTTP_MSG_RQURI:
|
|
case HTTP_MSG_RQURI_SP:
|
|
case HTTP_MSG_RQVER:
|
|
ptr = (char *)http_parse_reqline(msg, buf->data, state, ptr, end,
|
|
&buf->lr, &msg->msg_state);
|
|
if (unlikely(!ptr))
|
|
return;
|
|
|
|
/* we have a full request and we know that we have either a CR
|
|
* or an LF at <ptr>.
|
|
*/
|
|
//fprintf(stderr,"som=%d rq.l=%d *ptr=0x%02x\n", msg->som, msg->sl.rq.l, *ptr);
|
|
hdr_idx_set_start(idx, msg->sl.rq.l, *ptr == '\r');
|
|
|
|
msg->sol = ptr;
|
|
if (likely(*ptr == '\r'))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_rqline_end, HTTP_MSG_RQLINE_END);
|
|
goto http_msg_rqline_end;
|
|
|
|
http_msg_rqline_end:
|
|
case HTTP_MSG_RQLINE_END:
|
|
/* check for HTTP/0.9 request : no version information available.
|
|
* msg->sol must point to the first of CR or LF.
|
|
*/
|
|
if (unlikely(msg->sl.rq.v_l == 0))
|
|
goto http_msg_last_lf;
|
|
|
|
EXPECT_LF_HERE(ptr, http_msg_invalid);
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_first, HTTP_MSG_HDR_FIRST);
|
|
/* stop here */
|
|
|
|
/*
|
|
* Common states below
|
|
*/
|
|
http_msg_hdr_first:
|
|
case HTTP_MSG_HDR_FIRST:
|
|
msg->sol = ptr;
|
|
if (likely(!HTTP_IS_CRLF(*ptr))) {
|
|
goto http_msg_hdr_name;
|
|
}
|
|
|
|
if (likely(*ptr == '\r'))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
|
|
goto http_msg_last_lf;
|
|
|
|
http_msg_hdr_name:
|
|
case HTTP_MSG_HDR_NAME:
|
|
/* assumes msg->sol points to the first char */
|
|
if (likely(HTTP_IS_TOKEN(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
|
|
|
|
if (likely(*ptr == ':')) {
|
|
msg->col = ptr - buf->data;
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
|
|
}
|
|
|
|
if (likely(msg->err_pos < -1) || *ptr == '\n')
|
|
goto http_msg_invalid;
|
|
|
|
if (msg->err_pos == -1) /* capture error pointer */
|
|
msg->err_pos = ptr - buf->data; /* >= 0 now */
|
|
|
|
/* and we still accept this non-token character */
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_name, HTTP_MSG_HDR_NAME);
|
|
|
|
http_msg_hdr_l1_sp:
|
|
case HTTP_MSG_HDR_L1_SP:
|
|
/* assumes msg->sol points to the first char and msg->col to the colon */
|
|
if (likely(HTTP_IS_SPHT(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_sp, HTTP_MSG_HDR_L1_SP);
|
|
|
|
/* header value can be basically anything except CR/LF */
|
|
msg->sov = ptr - buf->data;
|
|
|
|
if (likely(!HTTP_IS_CRLF(*ptr))) {
|
|
goto http_msg_hdr_val;
|
|
}
|
|
|
|
if (likely(*ptr == '\r'))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lf, HTTP_MSG_HDR_L1_LF);
|
|
goto http_msg_hdr_l1_lf;
|
|
|
|
http_msg_hdr_l1_lf:
|
|
case HTTP_MSG_HDR_L1_LF:
|
|
EXPECT_LF_HERE(ptr, http_msg_invalid);
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l1_lws, HTTP_MSG_HDR_L1_LWS);
|
|
|
|
http_msg_hdr_l1_lws:
|
|
case HTTP_MSG_HDR_L1_LWS:
|
|
if (likely(HTTP_IS_SPHT(*ptr))) {
|
|
/* replace HT,CR,LF with spaces */
|
|
for (; buf->data+msg->sov < ptr; msg->sov++)
|
|
buf->data[msg->sov] = ' ';
|
|
goto http_msg_hdr_l1_sp;
|
|
}
|
|
/* we had a header consisting only in spaces ! */
|
|
msg->eol = buf->data + msg->sov;
|
|
goto http_msg_complete_header;
|
|
|
|
http_msg_hdr_val:
|
|
case HTTP_MSG_HDR_VAL:
|
|
/* assumes msg->sol points to the first char, msg->col to the
|
|
* colon, and msg->sov points to the first character of the
|
|
* value.
|
|
*/
|
|
if (likely(!HTTP_IS_CRLF(*ptr)))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_val, HTTP_MSG_HDR_VAL);
|
|
|
|
msg->eol = ptr;
|
|
/* Note: we could also copy eol into ->eoh so that we have the
|
|
* real header end in case it ends with lots of LWS, but is this
|
|
* really needed ?
|
|
*/
|
|
if (likely(*ptr == '\r'))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lf, HTTP_MSG_HDR_L2_LF);
|
|
goto http_msg_hdr_l2_lf;
|
|
|
|
http_msg_hdr_l2_lf:
|
|
case HTTP_MSG_HDR_L2_LF:
|
|
EXPECT_LF_HERE(ptr, http_msg_invalid);
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_hdr_l2_lws, HTTP_MSG_HDR_L2_LWS);
|
|
|
|
http_msg_hdr_l2_lws:
|
|
case HTTP_MSG_HDR_L2_LWS:
|
|
if (unlikely(HTTP_IS_SPHT(*ptr))) {
|
|
/* LWS: replace HT,CR,LF with spaces */
|
|
for (; msg->eol < ptr; msg->eol++)
|
|
*msg->eol = ' ';
|
|
goto http_msg_hdr_val;
|
|
}
|
|
http_msg_complete_header:
|
|
/*
|
|
* It was a new header, so the last one is finished.
|
|
* Assumes msg->sol points to the first char, msg->col to the
|
|
* colon, msg->sov points to the first character of the value
|
|
* and msg->eol to the first CR or LF so we know how the line
|
|
* ends. We insert last header into the index.
|
|
*/
|
|
/*
|
|
fprintf(stderr,"registering %-2d bytes : ", msg->eol - msg->sol);
|
|
write(2, msg->sol, msg->eol-msg->sol);
|
|
fprintf(stderr,"\n");
|
|
*/
|
|
|
|
if (unlikely(hdr_idx_add(msg->eol - msg->sol, *msg->eol == '\r',
|
|
idx, idx->tail) < 0))
|
|
goto http_msg_invalid;
|
|
|
|
msg->sol = ptr;
|
|
if (likely(!HTTP_IS_CRLF(*ptr))) {
|
|
goto http_msg_hdr_name;
|
|
}
|
|
|
|
if (likely(*ptr == '\r'))
|
|
EAT_AND_JUMP_OR_RETURN(http_msg_last_lf, HTTP_MSG_LAST_LF);
|
|
goto http_msg_last_lf;
|
|
|
|
http_msg_last_lf:
|
|
case HTTP_MSG_LAST_LF:
|
|
/* Assumes msg->sol points to the first of either CR or LF */
|
|
EXPECT_LF_HERE(ptr, http_msg_invalid);
|
|
ptr++;
|
|
buf->lr = ptr;
|
|
msg->eoh = msg->sol - buf->data;
|
|
msg->msg_state = HTTP_MSG_BODY;
|
|
return;
|
|
#ifdef DEBUG_FULL
|
|
default:
|
|
fprintf(stderr, "FIXME !!!! impossible state at %s:%d = %d\n", __FILE__, __LINE__, state);
|
|
exit(1);
|
|
#endif
|
|
}
|
|
http_msg_ood:
|
|
/* out of data */
|
|
msg->msg_state = state;
|
|
buf->lr = ptr;
|
|
return;
|
|
|
|
http_msg_invalid:
|
|
/* invalid message */
|
|
msg->msg_state = HTTP_MSG_ERROR;
|
|
buf->lr = ptr;
|
|
return;
|
|
}
|
|
|
|
/* convert an HTTP/0.9 request into an HTTP/1.0 request. Returns 1 if the
|
|
* conversion succeeded, 0 in case of error. If the request was already 1.X,
|
|
* nothing is done and 1 is returned.
|
|
*/
|
|
static int http_upgrade_v09_to_v10(struct buffer *req, struct http_msg *msg, struct http_txn *txn)
|
|
{
|
|
int delta;
|
|
char *cur_end;
|
|
|
|
if (msg->sl.rq.v_l != 0)
|
|
return 1;
|
|
|
|
msg->sol = req->data + msg->som;
|
|
cur_end = msg->sol + msg->sl.rq.l;
|
|
delta = 0;
|
|
|
|
if (msg->sl.rq.u_l == 0) {
|
|
/* if no URI was set, add "/" */
|
|
delta = buffer_replace2(req, cur_end, cur_end, " /", 2);
|
|
cur_end += delta;
|
|
msg->eoh += delta;
|
|
}
|
|
/* add HTTP version */
|
|
delta = buffer_replace2(req, cur_end, cur_end, " HTTP/1.0\r\n", 11);
|
|
msg->eoh += delta;
|
|
cur_end += delta;
|
|
cur_end = (char *)http_parse_reqline(msg, req->data,
|
|
HTTP_MSG_RQMETH,
|
|
msg->sol, cur_end + 1,
|
|
NULL, NULL);
|
|
if (unlikely(!cur_end))
|
|
return 0;
|
|
|
|
/* we have a full HTTP/1.0 request now and we know that
|
|
* we have either a CR or an LF at <ptr>.
|
|
*/
|
|
hdr_idx_set_start(&txn->hdr_idx, msg->sl.rq.l, *cur_end == '\r');
|
|
return 1;
|
|
}
|
|
|
|
/* This stream analyser waits for a complete HTTP request. It returns 1 if the
|
|
* processing can continue on next analysers, or zero if it either needs more
|
|
* data or wants to immediately abort the request (eg: timeout, error, ...). It
|
|
* is tied to AN_REQ_WAIT_HTTP and may may remove itself from s->req->analysers
|
|
* when it has nothing left to do, and may remove any analyser when it wants to
|
|
* abort.
|
|
*/
|
|
int http_wait_for_request(struct session *s, struct buffer *req, int an_bit)
|
|
{
|
|
/*
|
|
* We will parse the partial (or complete) lines.
|
|
* We will check the request syntax, and also join multi-line
|
|
* headers. An index of all the lines will be elaborated while
|
|
* parsing.
|
|
*
|
|
* For the parsing, we use a 28 states FSM.
|
|
*
|
|
* Here is the information we currently have :
|
|
* req->data + msg->som = beginning of request
|
|
* req->data + req->eoh = end of processed headers / start of current one
|
|
* req->data + req->eol = end of current header or line (LF or CRLF)
|
|
* req->lr = first non-visited byte
|
|
* req->r = end of data
|
|
*
|
|
* At end of parsing, we may perform a capture of the error (if any), and
|
|
* we will set a few fields (msg->sol, txn->meth, sn->flags/SN_REDIRECTABLE).
|
|
* We also check for monitor-uri, logging, HTTP/0.9 to 1.0 conversion, and
|
|
* finally headers capture.
|
|
*/
|
|
|
|
int cur_idx;
|
|
struct http_txn *txn = &s->txn;
|
|
struct http_msg *msg = &txn->req;
|
|
struct hdr_ctx ctx;
|
|
int conn_ka, conn_cl;
|
|
|
|
DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
|
|
now_ms, __FUNCTION__,
|
|
s,
|
|
req,
|
|
req->rex, req->wex,
|
|
req->flags,
|
|
req->l,
|
|
req->analysers);
|
|
|
|
/* we're speaking HTTP here, so let's speak HTTP to the client */
|
|
s->srv_error = http_return_srv_error;
|
|
|
|
if (likely(req->lr < req->r))
|
|
http_msg_analyzer(req, msg, &txn->hdr_idx);
|
|
|
|
/* 1: we might have to print this header in debug mode */
|
|
if (unlikely((global.mode & MODE_DEBUG) &&
|
|
(!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
|
|
(msg->msg_state == HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
|
|
char *eol, *sol;
|
|
|
|
sol = req->data + msg->som;
|
|
eol = sol + msg->sl.rq.l;
|
|
debug_hdr("clireq", s, sol, eol);
|
|
|
|
sol += hdr_idx_first_pos(&txn->hdr_idx);
|
|
cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
|
|
|
|
while (cur_idx) {
|
|
eol = sol + txn->hdr_idx.v[cur_idx].len;
|
|
debug_hdr("clihdr", s, sol, eol);
|
|
sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
|
|
cur_idx = txn->hdr_idx.v[cur_idx].next;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Now we quickly check if we have found a full valid request.
|
|
* If not so, we check the FD and buffer states before leaving.
|
|
* A full request is indicated by the fact that we have seen
|
|
* the double LF/CRLF, so the state is HTTP_MSG_BODY. Invalid
|
|
* requests are checked first.
|
|
*
|
|
*/
|
|
|
|
if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
|
|
/*
|
|
* First, let's catch bad requests.
|
|
*/
|
|
if (unlikely(msg->msg_state == HTTP_MSG_ERROR))
|
|
goto return_bad_req;
|
|
|
|
/* 1: Since we are in header mode, if there's no space
|
|
* left for headers, we won't be able to free more
|
|
* later, so the session will never terminate. We
|
|
* must terminate it now.
|
|
*/
|
|
if (unlikely(req->flags & BF_FULL)) {
|
|
/* FIXME: check if URI is set and return Status
|
|
* 414 Request URI too long instead.
|
|
*/
|
|
goto return_bad_req;
|
|
}
|
|
|
|
/* 2: have we encountered a read error ? */
|
|
else if (req->flags & BF_READ_ERROR) {
|
|
/* we cannot return any message on error */
|
|
if (msg->err_pos >= 0)
|
|
http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
|
|
msg->msg_state = HTTP_MSG_ERROR;
|
|
req->analysers = 0;
|
|
|
|
s->fe->counters.failed_req++;
|
|
if (s->listener->counters)
|
|
s->listener->counters->failed_req++;
|
|
|
|
if (!(s->flags & SN_ERR_MASK))
|
|
s->flags |= SN_ERR_CLICL;
|
|
if (!(s->flags & SN_FINST_MASK))
|
|
s->flags |= SN_FINST_R;
|
|
return 0;
|
|
}
|
|
|
|
/* 3: has the read timeout expired ? */
|
|
else if (req->flags & BF_READ_TIMEOUT || tick_is_expired(req->analyse_exp, now_ms)) {
|
|
/* read timeout : give up with an error message. */
|
|
if (msg->err_pos >= 0)
|
|
http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
|
|
txn->status = 408;
|
|
stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_408));
|
|
msg->msg_state = HTTP_MSG_ERROR;
|
|
req->analysers = 0;
|
|
|
|
s->fe->counters.failed_req++;
|
|
if (s->listener->counters)
|
|
s->listener->counters->failed_req++;
|
|
|
|
if (!(s->flags & SN_ERR_MASK))
|
|
s->flags |= SN_ERR_CLITO;
|
|
if (!(s->flags & SN_FINST_MASK))
|
|
s->flags |= SN_FINST_R;
|
|
return 0;
|
|
}
|
|
|
|
/* 4: have we encountered a close ? */
|
|
else if (req->flags & BF_SHUTR) {
|
|
if (msg->err_pos >= 0)
|
|
http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
|
|
txn->status = 400;
|
|
stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
|
|
msg->msg_state = HTTP_MSG_ERROR;
|
|
req->analysers = 0;
|
|
|
|
s->fe->counters.failed_req++;
|
|
if (s->listener->counters)
|
|
s->listener->counters->failed_req++;
|
|
|
|
if (!(s->flags & SN_ERR_MASK))
|
|
s->flags |= SN_ERR_CLICL;
|
|
if (!(s->flags & SN_FINST_MASK))
|
|
s->flags |= SN_FINST_R;
|
|
return 0;
|
|
}
|
|
|
|
buffer_dont_connect(req);
|
|
req->flags |= BF_READ_DONTWAIT; /* try to get back here ASAP */
|
|
|
|
/* just set the request timeout once at the beginning of the request */
|
|
if (!tick_isset(req->analyse_exp))
|
|
req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
|
|
|
|
/* we're not ready yet */
|
|
return 0;
|
|
}
|
|
|
|
/* OK now we have a complete HTTP request with indexed headers. Let's
|
|
* complete the request parsing by setting a few fields we will need
|
|
* later.
|
|
*/
|
|
|
|
/* Maybe we found in invalid header name while we were configured not
|
|
* to block on that, so we have to capture it now.
|
|
*/
|
|
if (unlikely(msg->err_pos >= 0))
|
|
http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
|
|
|
|
/* ensure we keep this pointer to the beginning of the message */
|
|
msg->sol = req->data + msg->som;
|
|
|
|
/*
|
|
* 1: identify the method
|
|
*/
|
|
txn->meth = find_http_meth(&req->data[msg->som], msg->sl.rq.m_l);
|
|
|
|
/* we can make use of server redirect on GET and HEAD */
|
|
if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
|
|
s->flags |= SN_REDIRECTABLE;
|
|
|
|
/*
|
|
* 2: check if the URI matches the monitor_uri.
|
|
* We have to do this for every request which gets in, because
|
|
* the monitor-uri is defined by the frontend.
|
|
*/
|
|
if (unlikely((s->fe->monitor_uri_len != 0) &&
|
|
(s->fe->monitor_uri_len == msg->sl.rq.u_l) &&
|
|
!memcmp(&req->data[msg->sl.rq.u],
|
|
s->fe->monitor_uri,
|
|
s->fe->monitor_uri_len))) {
|
|
/*
|
|
* We have found the monitor URI
|
|
*/
|
|
struct acl_cond *cond;
|
|
|
|
s->flags |= SN_MONITOR;
|
|
|
|
/* Check if we want to fail this monitor request or not */
|
|
list_for_each_entry(cond, &s->fe->mon_fail_cond, list) {
|
|
int ret = acl_exec_cond(cond, s->fe, s, txn, ACL_DIR_REQ);
|
|
|
|
ret = acl_pass(ret);
|
|
if (cond->pol == ACL_COND_UNLESS)
|
|
ret = !ret;
|
|
|
|
if (ret) {
|
|
/* we fail this request, let's return 503 service unavail */
|
|
txn->status = 503;
|
|
stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_503));
|
|
goto return_prx_cond;
|
|
}
|
|
}
|
|
|
|
/* nothing to fail, let's reply normaly */
|
|
txn->status = 200;
|
|
stream_int_retnclose(req->prod, &http_200_chunk);
|
|
goto return_prx_cond;
|
|
}
|
|
|
|
/*
|
|
* 3: Maybe we have to copy the original REQURI for the logs ?
|
|
* Note: we cannot log anymore if the request has been
|
|
* classified as invalid.
|
|
*/
|
|
if (unlikely(s->logs.logwait & LW_REQ)) {
|
|
/* we have a complete HTTP request that we must log */
|
|
if ((txn->uri = pool_alloc2(pool2_requri)) != NULL) {
|
|
int urilen = msg->sl.rq.l;
|
|
|
|
if (urilen >= REQURI_LEN)
|
|
urilen = REQURI_LEN - 1;
|
|
memcpy(txn->uri, &req->data[msg->som], urilen);
|
|
txn->uri[urilen] = 0;
|
|
|
|
if (!(s->logs.logwait &= ~LW_REQ))
|
|
s->do_log(s);
|
|
} else {
|
|
Alert("HTTP logging : out of memory.\n");
|
|
}
|
|
}
|
|
|
|
/* 4. We may have to convert HTTP/0.9 requests to HTTP/1.0 */
|
|
if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn))
|
|
goto return_bad_req;
|
|
|
|
/* 5: we may need to capture headers */
|
|
if (unlikely((s->logs.logwait & LW_REQHDR) && s->fe->req_cap))
|
|
capture_headers(req->data + msg->som, &txn->hdr_idx,
|
|
txn->req.cap, s->fe->req_cap);
|
|
|
|
/* 6: determine if we have a transfer-encoding or content-length.
|
|
* RFC2616 #4.4 states that :
|
|
* - If a Transfer-Encoding header field is present and has any value
|
|
* other than "identity", then the transfer-length is defined by use
|
|
* of the "chunked" transfer-coding ;
|
|
*
|
|
* - If a Content-Length header field is present, its decimal value in
|
|
* OCTETs represents both the entity-length and the transfer-length.
|
|
* If a message is received with both a Transfer-Encoding header
|
|
* field and a Content-Length header field, the latter MUST be ignored.
|
|
*
|
|
* - If a request contains a message-body and a Content-Length is not
|
|
* given, the server SHOULD respond with 400 (bad request) if it
|
|
* cannot determine the length of the message, or with 411 (length
|
|
* required) if it wishes to insist on receiving a valid Content-Length.
|
|
*/
|
|
|
|
/* FIXME: chunked encoding is HTTP/1.1 only */
|
|
ctx.idx = 0;
|
|
while (http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
|
|
if (ctx.vlen == 8 && strncasecmp(ctx.line + ctx.val, "identity", 8) == 0)
|
|
continue;
|
|
txn->flags |= TX_REQ_TE_CHNK;
|
|
break;
|
|
}
|
|
|
|
/* FIXME: below we should remove the content-length header(s) in case of chunked encoding */
|
|
ctx.idx = 0;
|
|
while (!(txn->flags & TX_REQ_TE_CHNK) &&
|
|
http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx)) {
|
|
signed long long cl;
|
|
|
|
if (!ctx.vlen)
|
|
goto return_bad_req;
|
|
|
|
if (strl2llrc(ctx.line + ctx.val, ctx.vlen, &cl))
|
|
goto return_bad_req; /* parse failure */
|
|
|
|
if (cl < 0)
|
|
goto return_bad_req;
|
|
|
|
if ((txn->flags & TX_REQ_CNT_LEN) && (msg->hdr_content_len != cl))
|
|
goto return_bad_req; /* already specified, was different */
|
|
|
|
txn->flags |= TX_REQ_CNT_LEN;
|
|
msg->hdr_content_len = cl;
|
|
}
|
|
|
|
/* Determine if the client wishes keep-alive or close.
|
|
* RFC2616 #8.1.2 and #14.10 state that HTTP/1.1 and above connections
|
|
* are persistent unless "Connection: close" is explicitly specified.
|
|
* RFC2616 #19.6.2 refers to RFC2068 for HTTP/1.0 persistent connections.
|
|
* RFC2068 #19.7.1 states that HTTP/1.0 clients are not persistent unless
|
|
* they explicitly specify "Connection: keep-alive", regardless of any
|
|
* optional "keep-alive" header.
|
|
*/
|
|
|
|
/* FIXME: should we also remove any header specified in "connection" ? */
|
|
conn_ka = conn_cl = 0;
|
|
ctx.idx = 0;
|
|
while (http_find_header2("Connection", 10, msg->sol, &txn->hdr_idx, &ctx)) {
|
|
if (ctx.vlen == 5 && strncasecmp(ctx.line + ctx.val, "close", 5) == 0)
|
|
conn_cl = 1;
|
|
else if (ctx.vlen == 10 && strncasecmp(ctx.line + ctx.val, "keep-alive", 10) == 0)
|
|
conn_ka = 1;
|
|
}
|
|
|
|
if ((msg->sl.rq.v_l == 8) &&
|
|
(req->data[msg->som + msg->sl.rq.v + 5] == '1') &&
|
|
(req->data[msg->som + msg->sl.rq.v + 7] == '0')) {
|
|
/* HTTP/1.0 */
|
|
if (conn_ka)
|
|
txn->flags |= (TX_CLI_CONN_KA | TX_SRV_CONN_KA);
|
|
} else {
|
|
/* HTTP/1.0 */
|
|
if (!conn_cl)
|
|
txn->flags |= (TX_CLI_CONN_KA | TX_SRV_CONN_KA);
|
|
}
|
|
|
|
/* we can mark the connection as non-persistent if needed */
|
|
if (!(txn->flags & TX_SRV_CONN_KA))
|
|
s->flags |= SN_CONN_CLOSED;
|
|
|
|
/* end of job, return OK */
|
|
req->analysers &= ~an_bit;
|
|
req->analyse_exp = TICK_ETERNITY;
|
|
return 1;
|
|
|
|
return_bad_req:
|
|
/* We centralize bad requests processing here */
|
|
if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
|
|
/* we detected a parsing error. We want to archive this request
|
|
* in the dedicated proxy area for later troubleshooting.
|
|
*/
|
|
http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
|
|
}
|
|
|
|
txn->req.msg_state = HTTP_MSG_ERROR;
|
|
txn->status = 400;
|
|
stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
|
|
|
|
s->fe->counters.failed_req++;
|
|
if (s->listener->counters)
|
|
s->listener->counters->failed_req++;
|
|
|
|
return_prx_cond:
|
|
if (!(s->flags & SN_ERR_MASK))
|
|
s->flags |= SN_ERR_PRXCOND;
|
|
if (!(s->flags & SN_FINST_MASK))
|
|
s->flags |= SN_FINST_R;
|
|
|
|
req->analysers = 0;
|
|
req->analyse_exp = TICK_ETERNITY;
|
|
return 0;
|
|
}
|
|
|
|
/* This stream analyser runs all HTTP request processing which is common to
|
|
* frontends and backends, which means blocking ACLs, filters, connection-close,
|
|
* reqadd, stats and redirects. This is performed for the designated proxy.
|
|
* It returns 1 if the processing can continue on next analysers, or zero if it
|
|
* either needs more data or wants to immediately abort the request (eg: deny,
|
|
* error, ...).
|
|
*/
|
|
int http_process_req_common(struct session *s, struct buffer *req, int an_bit, struct proxy *px)
|
|
{
|
|
struct http_txn *txn = &s->txn;
|
|
struct http_msg *msg = &txn->req;
|
|
struct acl_cond *cond;
|
|
struct redirect_rule *rule;
|
|
int cur_idx;
|
|
|
|
if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
|
|
/* we need more data */
|
|
buffer_dont_connect(req);
|
|
return 0;
|
|
}
|
|
|
|
req->analysers &= ~an_bit;
|
|
req->analyse_exp = TICK_ETERNITY;
|
|
|
|
DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
|
|
now_ms, __FUNCTION__,
|
|
s,
|
|
req,
|
|
req->rex, req->wex,
|
|
req->flags,
|
|
req->l,
|
|
req->analysers);
|
|
|
|
/* first check whether we have some ACLs set to block this request */
|
|
list_for_each_entry(cond, &px->block_cond, list) {
|
|
int ret = acl_exec_cond(cond, px, s, txn, ACL_DIR_REQ);
|
|
|
|
ret = acl_pass(ret);
|
|
if (cond->pol == ACL_COND_UNLESS)
|
|
ret = !ret;
|
|
|
|
if (ret) {
|
|
txn->status = 403;
|
|
/* let's log the request time */
|
|
s->logs.tv_request = now;
|
|
stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
|
|
goto return_prx_cond;
|
|
}
|
|
}
|
|
|
|
/* try headers filters */
|
|
if (px->req_exp != NULL) {
|
|
if (apply_filters_to_request(s, req, px->req_exp) < 0)
|
|
goto return_bad_req;
|
|
|
|
/* has the request been denied ? */
|
|
if (txn->flags & TX_CLDENY) {
|
|
/* no need to go further */
|
|
txn->status = 403;
|
|
/* let's log the request time */
|
|
s->logs.tv_request = now;
|
|
stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_403));
|
|
goto return_prx_cond;
|
|
}
|
|
|
|
/* When a connection is tarpitted, we use the tarpit timeout,
|
|
* which may be the same as the connect timeout if unspecified.
|
|
* If unset, then set it to zero because we really want it to
|
|
* eventually expire. We build the tarpit as an analyser.
|
|
*/
|
|
if (txn->flags & TX_CLTARPIT) {
|
|
buffer_erase(s->req);
|
|
/* wipe the request out so that we can drop the connection early
|
|
* if the client closes first.
|
|
*/
|
|
buffer_dont_connect(req);
|
|
req->analysers = 0; /* remove switching rules etc... */
|
|
req->analysers |= AN_REQ_HTTP_TARPIT;
|
|
req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.tarpit);
|
|
if (!req->analyse_exp)
|
|
req->analyse_exp = tick_add(now_ms, 0);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* We might have to check for "Connection:". The test for persistent
|
|
* connections has already been performed, so we only enter here if
|
|
* we are certain the connection is persistent.
|
|
*/
|
|
if (((s->fe->options | s->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) &&
|
|
!(s->flags & SN_CONN_CLOSED)) {
|
|
char *cur_ptr, *cur_end, *cur_next;
|
|
int old_idx, delta, val;
|
|
struct hdr_idx_elem *cur_hdr;
|
|
|
|
cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
|
|
old_idx = 0;
|
|
|
|
while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
|
|
cur_hdr = &txn->hdr_idx.v[cur_idx];
|
|
cur_ptr = cur_next;
|
|
cur_end = cur_ptr + cur_hdr->len;
|
|
cur_next = cur_end + cur_hdr->cr + 1;
|
|
|
|
val = http_header_match2(cur_ptr, cur_end, "Connection", 10);
|
|
if (val) {
|
|
/* 3 possibilities :
|
|
* - we have already set Connection: close,
|
|
* so we remove this line.
|
|
* - we have not yet set Connection: close,
|
|
* but this line indicates close. We leave
|
|
* it untouched and set the flag.
|
|
* - we have not yet set Connection: close,
|
|
* and this line indicates non-close. We
|
|
* replace it.
|
|
*/
|
|
if (s->flags & SN_CONN_CLOSED) {
|
|
delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
|
|
txn->req.eoh += delta;
|
|
cur_next += delta;
|
|
txn->hdr_idx.v[old_idx].next = cur_hdr->next;
|
|
txn->hdr_idx.used--;
|
|
cur_hdr->len = 0;
|
|
} else {
|
|
if (strncasecmp(cur_ptr + val, "close", 5) != 0) {
|
|
delta = buffer_replace2(req, cur_ptr + val, cur_end,
|
|
"close", 5);
|
|
cur_next += delta;
|
|
cur_hdr->len += delta;
|
|
txn->req.eoh += delta;
|
|
}
|
|
s->flags |= SN_CONN_CLOSED;
|
|
txn->flags &= ~TX_SRV_CONN_KA; /* keep-alive closed on server side */
|
|
}
|
|
}
|
|
old_idx = cur_idx;
|
|
}
|
|
|
|
/* if there is no "Connection: keep-alive" header left and we're
|
|
* in HTTP/1.0, then non-persistent connection is implied */
|
|
if (!(s->flags & SN_CONN_CLOSED) && (msg->sl.rq.v_l == 8) &&
|
|
(req->data[msg->som + msg->sl.rq.v + 5] == '1') &&
|
|
(req->data[msg->som + msg->sl.rq.v + 7] == '0')) {
|
|
s->flags |= SN_CONN_CLOSED;
|
|
txn->flags &= ~TX_SRV_CONN_KA; /* keep-alive closed on server side */
|
|
}
|
|
}
|
|
/* add request headers from the rule sets in the same order */
|
|
for (cur_idx = 0; cur_idx < px->nb_reqadd; cur_idx++) {
|
|
if (unlikely(http_header_add_tail(req,
|
|
&txn->req,
|
|
&txn->hdr_idx,
|
|
px->req_add[cur_idx])) < 0)
|
|
goto return_bad_req;
|
|
}
|
|
|
|
/* check if stats URI was requested, and if an auth is needed */
|
|
if (px->uri_auth != NULL &&
|
|
(txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)) {
|
|
/* we have to check the URI and auth for this request.
|
|
* FIXME!!! that one is rather dangerous, we want to
|
|
* make it follow standard rules (eg: clear req->analysers).
|
|
*/
|
|
if (stats_check_uri_auth(s, px)) {
|
|
req->analysers = 0;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* check whether we have some ACLs set to redirect this request */
|
|
list_for_each_entry(rule, &px->redirect_rules, list) {
|
|
int ret = acl_exec_cond(rule->cond, px, s, txn, ACL_DIR_REQ);
|
|
|
|
ret = acl_pass(ret);
|
|
if (rule->cond->pol == ACL_COND_UNLESS)
|
|
ret = !ret;
|
|
|
|
if (ret) {
|
|
struct chunk rdr = { trash, 0 };
|
|
const char *msg_fmt;
|
|
|
|
/* build redirect message */
|
|
switch(rule->code) {
|
|
case 303:
|
|
msg_fmt = HTTP_303;
|
|
break;
|
|
case 301:
|
|
msg_fmt = HTTP_301;
|
|
break;
|
|
case 302:
|
|
default:
|
|
msg_fmt = HTTP_302;
|
|
break;
|
|
}
|
|
|
|
if (unlikely(chunk_strcpy(&rdr, msg_fmt)))
|
|
goto return_bad_req;
|
|
|
|
switch(rule->type) {
|
|
case REDIRECT_TYPE_PREFIX: {
|
|
const char *path;
|
|
int pathlen;
|
|
|
|
path = http_get_path(txn);
|
|
/* build message using path */
|
|
if (path) {
|
|
pathlen = txn->req.sl.rq.u_l + (txn->req.sol+txn->req.sl.rq.u) - path;
|
|
if (rule->flags & REDIRECT_FLAG_DROP_QS) {
|
|
int qs = 0;
|
|
while (qs < pathlen) {
|
|
if (path[qs] == '?') {
|
|
pathlen = qs;
|
|
break;
|
|
}
|
|
qs++;
|
|
}
|
|
}
|
|
} else {
|
|
path = "/";
|
|
pathlen = 1;
|
|
}
|
|
|
|
if (rdr.len + rule->rdr_len + pathlen > rdr.size - 4)
|
|
goto return_bad_req;
|
|
|
|
/* add prefix. Note that if prefix == "/", we don't want to
|
|
* add anything, otherwise it makes it hard for the user to
|
|
* configure a self-redirection.
|
|
*/
|
|
if (rule->rdr_len != 1 || *rule->rdr_str != '/') {
|
|
memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
|
|
rdr.len += rule->rdr_len;
|
|
}
|
|
|
|
/* add path */
|
|
memcpy(rdr.str + rdr.len, path, pathlen);
|
|
rdr.len += pathlen;
|
|
break;
|
|
}
|
|
case REDIRECT_TYPE_LOCATION:
|
|
default:
|
|
if (rdr.len + rule->rdr_len > rdr.size - 4)
|
|
goto return_bad_req;
|
|
|
|
/* add location */
|
|
memcpy(rdr.str + rdr.len, rule->rdr_str, rule->rdr_len);
|
|
rdr.len += rule->rdr_len;
|
|
break;
|
|
}
|
|
|
|
if (rule->cookie_len) {
|
|
memcpy(rdr.str + rdr.len, "\r\nSet-Cookie: ", 14);
|
|
rdr.len += 14;
|
|
memcpy(rdr.str + rdr.len, rule->cookie_str, rule->cookie_len);
|
|
rdr.len += rule->cookie_len;
|
|
memcpy(rdr.str + rdr.len, "\r\n", 2);
|
|
rdr.len += 2;
|
|
}
|
|
|
|
/* add end of headers */
|
|
memcpy(rdr.str + rdr.len, "\r\n\r\n", 4);
|
|
rdr.len += 4;
|
|
|
|
txn->status = rule->code;
|
|
/* let's log the request time */
|
|
s->logs.tv_request = now;
|
|
stream_int_retnclose(req->prod, &rdr);
|
|
goto return_prx_cond;
|
|
}
|
|
}
|
|
|
|
/* We can shut read side if "connection: close" && !abort_on_close && !content-length */
|
|
if ((txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD) &&
|
|
(s->flags & SN_CONN_CLOSED) && !(s->be->options & PR_O_ABRT_CLOSE)) {
|
|
struct hdr_ctx ctx;
|
|
ctx.idx = 0;
|
|
if (!http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx)) {
|
|
ctx.idx = 0;
|
|
if (!http_find_header2("Content-length", 14, msg->sol, &txn->hdr_idx, &ctx))
|
|
req->flags |= BF_DONT_READ;
|
|
}
|
|
}
|
|
|
|
/* that's OK for us now, let's move on to next analysers */
|
|
return 1;
|
|
|
|
return_bad_req:
|
|
/* We centralize bad requests processing here */
|
|
if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
|
|
/* we detected a parsing error. We want to archive this request
|
|
* in the dedicated proxy area for later troubleshooting.
|
|
*/
|
|
http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
|
|
}
|
|
|
|
txn->req.msg_state = HTTP_MSG_ERROR;
|
|
txn->status = 400;
|
|
stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
|
|
|
|
s->fe->counters.failed_req++;
|
|
if (s->listener->counters)
|
|
s->listener->counters->failed_req++;
|
|
|
|
return_prx_cond:
|
|
if (!(s->flags & SN_ERR_MASK))
|
|
s->flags |= SN_ERR_PRXCOND;
|
|
if (!(s->flags & SN_FINST_MASK))
|
|
s->flags |= SN_FINST_R;
|
|
|
|
req->analysers = 0;
|
|
req->analyse_exp = TICK_ETERNITY;
|
|
return 0;
|
|
}
|
|
|
|
/* This function performs all the processing enabled for the current request.
|
|
* It returns 1 if the processing can continue on next analysers, or zero if it
|
|
* needs more data, encounters an error, or wants to immediately abort the
|
|
* request. It relies on buffers flags, and updates s->req->analysers.
|
|
*/
|
|
int http_process_request(struct session *s, struct buffer *req, int an_bit)
|
|
{
|
|
struct http_txn *txn = &s->txn;
|
|
struct http_msg *msg = &txn->req;
|
|
|
|
if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
|
|
/* we need more data */
|
|
buffer_dont_connect(req);
|
|
return 0;
|
|
}
|
|
|
|
req->analysers &= ~an_bit;
|
|
req->analyse_exp = TICK_ETERNITY;
|
|
|
|
DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
|
|
now_ms, __FUNCTION__,
|
|
s,
|
|
req,
|
|
req->rex, req->wex,
|
|
req->flags,
|
|
req->l,
|
|
req->analysers);
|
|
|
|
/*
|
|
* Right now, we know that we have processed the entire headers
|
|
* and that unwanted requests have been filtered out. We can do
|
|
* whatever we want with the remaining request. Also, now we
|
|
* may have separate values for ->fe, ->be.
|
|
*/
|
|
|
|
/*
|
|
* If HTTP PROXY is set we simply get remote server address
|
|
* parsing incoming request.
|
|
*/
|
|
if ((s->be->options & PR_O_HTTP_PROXY) && !(s->flags & SN_ADDR_SET)) {
|
|
url2sa(req->data + msg->sl.rq.u, msg->sl.rq.u_l, &s->srv_addr);
|
|
}
|
|
|
|
/*
|
|
* 7: the appsession cookie was looked up very early in 1.2,
|
|
* so let's do the same now.
|
|
*/
|
|
|
|
/* It needs to look into the URI */
|
|
if (s->be->appsession_name) {
|
|
get_srv_from_appsession(s, &req->data[msg->som], msg->sl.rq.l);
|
|
}
|
|
|
|
/*
|
|
* 8: Now we can work with the cookies.
|
|
* Note that doing so might move headers in the request, but
|
|
* the fields will stay coherent and the URI will not move.
|
|
* This should only be performed in the backend.
|
|
*/
|
|
if ((s->be->cookie_name || s->be->appsession_name || s->fe->capture_name)
|
|
&& !(txn->flags & (TX_CLDENY|TX_CLTARPIT)))
|
|
manage_client_side_cookies(s, req);
|
|
|
|
/*
|
|
* 9: add X-Forwarded-For if either the frontend or the backend
|
|
* asks for it.
|
|
*/
|
|
if ((s->fe->options | s->be->options) & PR_O_FWDFOR) {
|
|
if (s->cli_addr.ss_family == AF_INET) {
|
|
/* Add an X-Forwarded-For header unless the source IP is
|
|
* in the 'except' network range.
|
|
*/
|
|
if ((!s->fe->except_mask.s_addr ||
|
|
(((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->fe->except_mask.s_addr)
|
|
!= s->fe->except_net.s_addr) &&
|
|
(!s->be->except_mask.s_addr ||
|
|
(((struct sockaddr_in *)&s->cli_addr)->sin_addr.s_addr & s->be->except_mask.s_addr)
|
|
!= s->be->except_net.s_addr)) {
|
|
int len;
|
|
unsigned char *pn;
|
|
pn = (unsigned char *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr;
|
|
|
|
/* Note: we rely on the backend to get the header name to be used for
|
|
* x-forwarded-for, because the header is really meant for the backends.
|
|
* However, if the backend did not specify any option, we have to rely
|
|
* on the frontend's header name.
|
|
*/
|
|
if (s->be->fwdfor_hdr_len) {
|
|
len = s->be->fwdfor_hdr_len;
|
|
memcpy(trash, s->be->fwdfor_hdr_name, len);
|
|
} else {
|
|
len = s->fe->fwdfor_hdr_len;
|
|
memcpy(trash, s->fe->fwdfor_hdr_name, len);
|
|
}
|
|
len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
|
|
|
|
if (unlikely(http_header_add_tail2(req, &txn->req,
|
|
&txn->hdr_idx, trash, len)) < 0)
|
|
goto return_bad_req;
|
|
}
|
|
}
|
|
else if (s->cli_addr.ss_family == AF_INET6) {
|
|
/* FIXME: for the sake of completeness, we should also support
|
|
* 'except' here, although it is mostly useless in this case.
|
|
*/
|
|
int len;
|
|
char pn[INET6_ADDRSTRLEN];
|
|
inet_ntop(AF_INET6,
|
|
(const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
|
|
pn, sizeof(pn));
|
|
|
|
/* Note: we rely on the backend to get the header name to be used for
|
|
* x-forwarded-for, because the header is really meant for the backends.
|
|
* However, if the backend did not specify any option, we have to rely
|
|
* on the frontend's header name.
|
|
*/
|
|
if (s->be->fwdfor_hdr_len) {
|
|
len = s->be->fwdfor_hdr_len;
|
|
memcpy(trash, s->be->fwdfor_hdr_name, len);
|
|
} else {
|
|
len = s->fe->fwdfor_hdr_len;
|
|
memcpy(trash, s->fe->fwdfor_hdr_name, len);
|
|
}
|
|
len += sprintf(trash + len, ": %s", pn);
|
|
|
|
if (unlikely(http_header_add_tail2(req, &txn->req,
|
|
&txn->hdr_idx, trash, len)) < 0)
|
|
goto return_bad_req;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 10: add X-Original-To if either the frontend or the backend
|
|
* asks for it.
|
|
*/
|
|
if ((s->fe->options | s->be->options) & PR_O_ORGTO) {
|
|
|
|
/* FIXME: don't know if IPv6 can handle that case too. */
|
|
if (s->cli_addr.ss_family == AF_INET) {
|
|
/* Add an X-Original-To header unless the destination IP is
|
|
* in the 'except' network range.
|
|
*/
|
|
if (!(s->flags & SN_FRT_ADDR_SET))
|
|
get_frt_addr(s);
|
|
|
|
if ((!s->fe->except_mask_to.s_addr ||
|
|
(((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->fe->except_mask_to.s_addr)
|
|
!= s->fe->except_to.s_addr) &&
|
|
(!s->be->except_mask_to.s_addr ||
|
|
(((struct sockaddr_in *)&s->frt_addr)->sin_addr.s_addr & s->be->except_mask_to.s_addr)
|
|
!= s->be->except_to.s_addr)) {
|
|
int len;
|
|
unsigned char *pn;
|
|
pn = (unsigned char *)&((struct sockaddr_in *)&s->frt_addr)->sin_addr;
|
|
|
|
/* Note: we rely on the backend to get the header name to be used for
|
|
* x-original-to, because the header is really meant for the backends.
|
|
* However, if the backend did not specify any option, we have to rely
|
|
* on the frontend's header name.
|
|
*/
|
|
if (s->be->orgto_hdr_len) {
|
|
len = s->be->orgto_hdr_len;
|
|
memcpy(trash, s->be->orgto_hdr_name, len);
|
|
} else {
|
|
len = s->fe->orgto_hdr_len;
|
|
memcpy(trash, s->fe->orgto_hdr_name, len);
|
|
}
|
|
len += sprintf(trash + len, ": %d.%d.%d.%d", pn[0], pn[1], pn[2], pn[3]);
|
|
|
|
if (unlikely(http_header_add_tail2(req, &txn->req,
|
|
&txn->hdr_idx, trash, len)) < 0)
|
|
goto return_bad_req;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 11: add "Connection: close" if needed and not yet set. */
|
|
if (!(s->flags & SN_CONN_CLOSED) &&
|
|
((s->fe->options | s->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO))) {
|
|
if (unlikely(http_header_add_tail2(req, &txn->req, &txn->hdr_idx,
|
|
"Connection: close", 17)) < 0)
|
|
goto return_bad_req;
|
|
s->flags |= SN_CONN_CLOSED;
|
|
}
|
|
/* Before we switch to data, was assignment set in manage_client_side_cookie?
|
|
* If not assigned, perhaps we are balancing on url_param, but this is a
|
|
* POST; and the parameters are in the body, maybe scan there to find our server.
|
|
* (unless headers overflowed the buffer?)
|
|
*/
|
|
if (!(s->flags & (SN_ASSIGNED|SN_DIRECT)) &&
|
|
s->txn.meth == HTTP_METH_POST && s->be->url_param_name != NULL &&
|
|
s->be->url_param_post_limit != 0 && !(req->flags & BF_FULL) &&
|
|
memchr(msg->sol + msg->sl.rq.u, '?', msg->sl.rq.u_l) == NULL) {
|
|
/* are there enough bytes here? total == l || r || rlim ?
|
|
* len is unsigned, but eoh is int,
|
|
* how many bytes of body have we received?
|
|
* eoh is the first empty line of the header
|
|
*/
|
|
/* already established CRLF or LF at eoh, move to start of message, find message length in buffer */
|
|
unsigned long len = req->l - (msg->sol[msg->eoh] == '\r' ? msg->eoh + 2 : msg->eoh + 1);
|
|
|
|
/* If we have HTTP/1.1 and Expect: 100-continue, then abort.
|
|
* We can't assume responsibility for the server's decision,
|
|
* on this URI and header set. See rfc2616: 14.20, 8.2.3,
|
|
* We also can't change our mind later, about which server to choose, so round robin.
|
|
*/
|
|
if ((likely(msg->sl.rq.v_l == 8) && req->data[msg->som + msg->sl.rq.v + 7] == '1')) {
|
|
struct hdr_ctx ctx;
|
|
ctx.idx = 0;
|
|
/* Expect is allowed in 1.1, look for it */
|
|
http_find_header2("Expect", 6, msg->sol, &txn->hdr_idx, &ctx);
|
|
if (ctx.idx != 0 &&
|
|
unlikely(ctx.vlen == 12 && strncasecmp(ctx.line+ctx.val, "100-continue", 12) == 0))
|
|
/* We can't reliablly stall and wait for data, because of
|
|
* .NET clients that don't conform to rfc2616; so, no need for
|
|
* the next block to check length expectations.
|
|
* We could send 100 status back to the client, but then we need to
|
|
* re-write headers, and send the message. And this isn't the right
|
|
* place for that action.
|
|
* TODO: support Expect elsewhere and delete this block.
|
|
*/
|
|
goto end_check_maybe_wait_for_body;
|
|
}
|
|
|
|
if (likely(len > s->be->url_param_post_limit)) {
|
|
/* nothing to do, we got enough */
|
|
} else {
|
|
/* limit implies we are supposed to need this many bytes
|
|
* to find the parameter. Let's see how many bytes we can wait for.
|
|
*/
|
|
long long hint = len;
|
|
struct hdr_ctx ctx;
|
|
ctx.idx = 0;
|
|
http_find_header2("Transfer-Encoding", 17, msg->sol, &txn->hdr_idx, &ctx);
|
|
if (ctx.idx && ctx.vlen >= 7 && strncasecmp(ctx.line+ctx.val, "chunked", 7) == 0) {
|
|
buffer_dont_connect(req);
|
|
req->analysers |= AN_REQ_HTTP_BODY;
|
|
}
|
|
else {
|
|
ctx.idx = 0;
|
|
http_find_header2("Content-Length", 14, msg->sol, &txn->hdr_idx, &ctx);
|
|
/* now if we have a length, we'll take the hint */
|
|
if (ctx.idx) {
|
|
/* We have Content-Length */
|
|
if (strl2llrc(ctx.line+ctx.val,ctx.vlen, &hint))
|
|
hint = 0; /* parse failure, untrusted client */
|
|
else {
|
|
if (hint > 0)
|
|
msg->hdr_content_len = hint;
|
|
else
|
|
hint = 0; /* bad client, sent negative length */
|
|
}
|
|
}
|
|
/* but limited to what we care about, maybe we don't expect any entity data (hint == 0) */
|
|
if (s->be->url_param_post_limit < hint)
|
|
hint = s->be->url_param_post_limit;
|
|
/* now do we really need to buffer more data? */
|
|
if (len < hint) {
|
|
buffer_dont_connect(req);
|
|
req->analysers |= AN_REQ_HTTP_BODY;
|
|
}
|
|
/* else... There are no body bytes to wait for */
|
|
}
|
|
}
|
|
}
|
|
end_check_maybe_wait_for_body:
|
|
|
|
/*************************************************************
|
|
* OK, that's finished for the headers. We have done what we *
|
|
* could. Let's switch to the DATA state. *
|
|
************************************************************/
|
|
|
|
buffer_set_rlim(req, req->size); /* no more rewrite needed */
|
|
s->logs.tv_request = now;
|
|
|
|
/* OK let's go on with the BODY now */
|
|
return 1;
|
|
|
|
return_bad_req: /* let's centralize all bad requests */
|
|
if (unlikely(msg->msg_state == HTTP_MSG_ERROR) || msg->err_pos >= 0) {
|
|
/* we detected a parsing error. We want to archive this request
|
|
* in the dedicated proxy area for later troubleshooting.
|
|
*/
|
|
http_capture_bad_message(&s->fe->invalid_req, s, req, msg, s->fe);
|
|
}
|
|
|
|
txn->req.msg_state = HTTP_MSG_ERROR;
|
|
txn->status = 400;
|
|
req->analysers = 0;
|
|
stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_400));
|
|
|
|
s->fe->counters.failed_req++;
|
|
if (s->listener->counters)
|
|
s->listener->counters->failed_req++;
|
|
|
|
if (!(s->flags & SN_ERR_MASK))
|
|
s->flags |= SN_ERR_PRXCOND;
|
|
if (!(s->flags & SN_FINST_MASK))
|
|
s->flags |= SN_FINST_R;
|
|
return 0;
|
|
}
|
|
|
|
/* This function is an analyser which processes the HTTP tarpit. It always
|
|
* returns zero, at the beginning because it prevents any other processing
|
|
* from occurring, and at the end because it terminates the request.
|
|
*/
|
|
int http_process_tarpit(struct session *s, struct buffer *req, int an_bit)
|
|
{
|
|
struct http_txn *txn = &s->txn;
|
|
|
|
/* This connection is being tarpitted. The CLIENT side has
|
|
* already set the connect expiration date to the right
|
|
* timeout. We just have to check that the client is still
|
|
* there and that the timeout has not expired.
|
|
*/
|
|
buffer_dont_connect(req);
|
|
if ((req->flags & (BF_SHUTR|BF_READ_ERROR)) == 0 &&
|
|
!tick_is_expired(req->analyse_exp, now_ms))
|
|
return 0;
|
|
|
|
/* We will set the queue timer to the time spent, just for
|
|
* logging purposes. We fake a 500 server error, so that the
|
|
* attacker will not suspect his connection has been tarpitted.
|
|
* It will not cause trouble to the logs because we can exclude
|
|
* the tarpitted connections by filtering on the 'PT' status flags.
|
|
*/
|
|
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
|
|
|
txn->status = 500;
|
|
if (req->flags != BF_READ_ERROR)
|
|
stream_int_retnclose(req->prod, error_message(s, HTTP_ERR_500));
|
|
|
|
req->analysers = 0;
|
|
req->analyse_exp = TICK_ETERNITY;
|
|
|
|
s->fe->counters.failed_req++;
|
|
if (s->listener->counters)
|
|
s->listener->counters->failed_req++;
|
|
|
|
if (!(s->flags & SN_ERR_MASK))
|
|
s->flags |= SN_ERR_PRXCOND;
|
|
if (!(s->flags & SN_FINST_MASK))
|
|
s->flags |= SN_FINST_T;
|
|
return 0;
|
|
}
|
|
|
|
/* This function is an analyser which processes the HTTP request body. It looks
|
|
* for parameters to be used for the load balancing algorithm (url_param). It
|
|
* must only be called after the standard HTTP request processing has occurred,
|
|
* because it expects the request to be parsed. It returns zero if it needs to
|
|
* read more data, or 1 once it has completed its analysis.
|
|
*/
|
|
int http_process_request_body(struct session *s, struct buffer *req, int an_bit)
|
|
{
|
|
struct http_msg *msg = &s->txn.req;
|
|
unsigned long body = msg->sol[msg->eoh] == '\r' ? msg->eoh + 2 : msg->eoh + 1;
|
|
long long limit = s->be->url_param_post_limit;
|
|
struct hdr_ctx ctx;
|
|
|
|
if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
|
|
/* we need more data */
|
|
buffer_dont_connect(req);
|
|
return 0;
|
|
}
|
|
|
|
/* We have to parse the HTTP request body to find any required data.
|
|
* "balance url_param check_post" should have been the only way to get
|
|
* into this. We were brought here after HTTP header analysis, so all
|
|
* related structures are ready.
|
|
*/
|
|
|
|
ctx.idx = 0;
|
|
|
|
/* now if we have a length, we'll take the hint */
|
|
http_find_header2("Transfer-Encoding", 17, msg->sol, &s->txn.hdr_idx, &ctx);
|
|
if (ctx.idx && ctx.vlen >= 7 && strncasecmp(ctx.line+ctx.val, "chunked", 7) == 0) {
|
|
unsigned int chunk = 0;
|
|
while (body < req->l && !HTTP_IS_CRLF(msg->sol[body])) {
|
|
char c = msg->sol[body];
|
|
if (ishex(c)) {
|
|
unsigned int hex = toupper(c) - '0';
|
|
if (hex > 9)
|
|
hex -= 'A' - '9' - 1;
|
|
chunk = (chunk << 4) | hex;
|
|
} else
|
|
break;
|
|
body++;
|
|
}
|
|
if (body + 2 >= req->l) /* we want CRLF too */
|
|
goto http_body_end; /* end of buffer? data missing! */
|
|
|
|
if (memcmp(msg->sol+body, "\r\n", 2) != 0)
|
|
goto http_body_end; /* chunked encoding len ends with CRLF, and we don't have it yet */
|
|
|
|
body += 2; // skip CRLF
|
|
|
|
/* if we support more then one chunk here, we have to do it again when assigning server
|
|
* 1. how much entity data do we have? new var
|
|
* 2. should save entity_start, entity_cursor, elen & rlen in req; so we don't repeat scanning here
|
|
* 3. test if elen > limit, or set new limit to elen if 0 (end of entity found)
|
|
*/
|
|
|
|
if (chunk < limit)
|
|
limit = chunk; /* only reading one chunk */
|
|
} else {
|
|
if (msg->hdr_content_len < limit)
|
|
limit = msg->hdr_content_len;
|
|
}
|
|
|
|
http_body_end:
|
|
/* we leave once we know we have nothing left to do. This means that we have
|
|
* enough bytes, or that we know we'll not get any more (buffer full, read
|
|
* buffer closed).
|
|
*/
|
|
if (req->l - body >= limit || /* enough bytes! */
|
|
req->flags & (BF_FULL | BF_READ_ERROR | BF_SHUTR | BF_READ_TIMEOUT) ||
|
|
tick_is_expired(req->analyse_exp, now_ms)) {
|
|
/* The situation will not evolve, so let's give up on the analysis. */
|
|
s->logs.tv_request = now; /* update the request timer to reflect full request */
|
|
req->analysers &= ~an_bit;
|
|
req->analyse_exp = TICK_ETERNITY;
|
|
return 1;
|
|
}
|
|
else {
|
|
/* Not enough data. We'll re-use the http-request
|
|
* timeout here. Ideally, we should set the timeout
|
|
* relative to the accept() date. We just set the
|
|
* request timeout once at the beginning of the
|
|
* request.
|
|
*/
|
|
buffer_dont_connect(req);
|
|
if (!tick_isset(req->analyse_exp))
|
|
req->analyse_exp = tick_add_ifset(now_ms, s->be->timeout.httpreq);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* This function performs all the processing enabled for the current response.
|
|
* It normally returns zero, but may return 1 if it absolutely needs to be
|
|
* called again after other functions. It relies on buffers flags, and updates
|
|
* t->rep->analysers. It might make sense to explode it into several other
|
|
* functions. It works like process_request (see indications above).
|
|
*/
|
|
int process_response(struct session *t)
|
|
{
|
|
struct http_txn *txn = &t->txn;
|
|
struct buffer *req = t->req;
|
|
struct buffer *rep = t->rep;
|
|
int n;
|
|
|
|
next_response:
|
|
DPRINTF(stderr,"[%u] %s: session=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
|
|
now_ms, __FUNCTION__,
|
|
t,
|
|
rep,
|
|
rep->rex, rep->wex,
|
|
rep->flags,
|
|
rep->l,
|
|
rep->analysers);
|
|
|
|
if (rep->analysers & AN_RTR_HTTP_HDR) { /* receiving server headers */
|
|
/*
|
|
* Now parse the partial (or complete) lines.
|
|
* We will check the response syntax, and also join multi-line
|
|
* headers. An index of all the lines will be elaborated while
|
|
* parsing.
|
|
*
|
|
* For the parsing, we use a 28 states FSM.
|
|
*
|
|
* Here is the information we currently have :
|
|
* rep->data + rep->som = beginning of response
|
|
* rep->data + rep->eoh = end of processed headers / start of current one
|
|
* rep->data + rep->eol = end of current header or line (LF or CRLF)
|
|
* rep->lr = first non-visited byte
|
|
* rep->r = end of data
|
|
*/
|
|
|
|
int cur_idx;
|
|
struct http_msg *msg = &txn->rsp;
|
|
struct proxy *cur_proxy;
|
|
|
|
if (likely(rep->lr < rep->r))
|
|
http_msg_analyzer(rep, msg, &txn->hdr_idx);
|
|
|
|
/* 1: we might have to print this header in debug mode */
|
|
if (unlikely((global.mode & MODE_DEBUG) &&
|
|
(!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
|
|
(msg->msg_state == HTTP_MSG_BODY || msg->msg_state == HTTP_MSG_ERROR))) {
|
|
char *eol, *sol;
|
|
|
|
sol = rep->data + msg->som;
|
|
eol = sol + msg->sl.rq.l;
|
|
debug_hdr("srvrep", t, sol, eol);
|
|
|
|
sol += hdr_idx_first_pos(&txn->hdr_idx);
|
|
cur_idx = hdr_idx_first_idx(&txn->hdr_idx);
|
|
|
|
while (cur_idx) {
|
|
eol = sol + txn->hdr_idx.v[cur_idx].len;
|
|
debug_hdr("srvhdr", t, sol, eol);
|
|
sol = eol + txn->hdr_idx.v[cur_idx].cr + 1;
|
|
cur_idx = txn->hdr_idx.v[cur_idx].next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now we quickly check if we have found a full valid response.
|
|
* If not so, we check the FD and buffer states before leaving.
|
|
* A full response is indicated by the fact that we have seen
|
|
* the double LF/CRLF, so the state is HTTP_MSG_BODY. Invalid
|
|
* responses are checked first.
|
|
*
|
|
* Depending on whether the client is still there or not, we
|
|
* may send an error response back or not. Note that normally
|
|
* we should only check for HTTP status there, and check I/O
|
|
* errors somewhere else.
|
|
*/
|
|
|
|
if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
|
|
/* Invalid response */
|
|
if (unlikely(msg->msg_state == HTTP_MSG_ERROR)) {
|
|
/* we detected a parsing error. We want to archive this response
|
|
* in the dedicated proxy area for later troubleshooting.
|
|
*/
|
|
hdr_response_bad:
|
|
if (msg->msg_state == HTTP_MSG_ERROR || msg->err_pos >= 0)
|
|
http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
|
|
|
|
buffer_shutr_now(rep);
|
|
buffer_shutw_now(req);
|
|
if (t->srv)
|
|
t->srv->counters.failed_resp++;
|
|
t->be->counters.failed_resp++;
|
|
rep->analysers = 0;
|
|
txn->status = 502;
|
|
stream_int_return(rep->cons, error_message(t, HTTP_ERR_502));
|
|
if (!(t->flags & SN_ERR_MASK))
|
|
t->flags |= SN_ERR_PRXCOND;
|
|
if (!(t->flags & SN_FINST_MASK))
|
|
t->flags |= SN_FINST_H;
|
|
|
|
return 0;
|
|
}
|
|
/* too large response does not fit in buffer. */
|
|
else if (rep->flags & BF_FULL) {
|
|
goto hdr_response_bad;
|
|
}
|
|
/* read error */
|
|
else if (rep->flags & BF_READ_ERROR) {
|
|
if (msg->err_pos >= 0)
|
|
http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
|
|
buffer_shutr_now(rep);
|
|
buffer_shutw_now(req);
|
|
if (t->srv)
|
|
t->srv->counters.failed_resp++;
|
|
t->be->counters.failed_resp++;
|
|
rep->analysers = 0;
|
|
txn->status = 502;
|
|
stream_int_return(rep->cons, error_message(t, HTTP_ERR_502));
|
|
if (!(t->flags & SN_ERR_MASK))
|
|
t->flags |= SN_ERR_SRVCL;
|
|
if (!(t->flags & SN_FINST_MASK))
|
|
t->flags |= SN_FINST_H;
|
|
return 0;
|
|
}
|
|
/* read timeout : return a 504 to the client. */
|
|
else if (rep->flags & BF_READ_TIMEOUT) {
|
|
if (msg->err_pos >= 0)
|
|
http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
|
|
buffer_shutr_now(rep);
|
|
buffer_shutw_now(req);
|
|
if (t->srv)
|
|
t->srv->counters.failed_resp++;
|
|
t->be->counters.failed_resp++;
|
|
rep->analysers = 0;
|
|
txn->status = 504;
|
|
stream_int_return(rep->cons, error_message(t, HTTP_ERR_504));
|
|
if (!(t->flags & SN_ERR_MASK))
|
|
t->flags |= SN_ERR_SRVTO;
|
|
if (!(t->flags & SN_FINST_MASK))
|
|
t->flags |= SN_FINST_H;
|
|
return 0;
|
|
}
|
|
/* close from server */
|
|
else if (rep->flags & BF_SHUTR) {
|
|
if (msg->err_pos >= 0)
|
|
http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
|
|
buffer_shutw_now(req);
|
|
if (t->srv)
|
|
t->srv->counters.failed_resp++;
|
|
t->be->counters.failed_resp++;
|
|
rep->analysers = 0;
|
|
txn->status = 502;
|
|
stream_int_return(rep->cons, error_message(t, HTTP_ERR_502));
|
|
if (!(t->flags & SN_ERR_MASK))
|
|
t->flags |= SN_ERR_SRVCL;
|
|
if (!(t->flags & SN_FINST_MASK))
|
|
t->flags |= SN_FINST_H;
|
|
return 0;
|
|
}
|
|
/* write error to client (we don't send any message then) */
|
|
else if (rep->flags & BF_WRITE_ERROR) {
|
|
if (msg->err_pos >= 0)
|
|
http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
|
|
buffer_shutr_now(rep);
|
|
t->be->counters.failed_resp++;
|
|
rep->analysers = 0;
|
|
if (!(t->flags & SN_ERR_MASK))
|
|
t->flags |= SN_ERR_CLICL;
|
|
if (!(t->flags & SN_FINST_MASK))
|
|
t->flags |= SN_FINST_H;
|
|
return 0;
|
|
}
|
|
|
|
buffer_dont_close(rep);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*****************************************************************
|
|
* More interesting part now : we know that we have a complete *
|
|
* response which at least looks like HTTP. We have an indicator *
|
|
* of each header's length, so we can parse them quickly. *
|
|
****************************************************************/
|
|
|
|
if (msg->err_pos >= 0)
|
|
http_capture_bad_message(&t->be->invalid_rep, t, rep, msg, t->fe);
|
|
|
|
rep->analysers &= ~AN_RTR_HTTP_HDR;
|
|
|
|
/* ensure we keep this pointer to the beginning of the message */
|
|
msg->sol = rep->data + msg->som;
|
|
|
|
/*
|
|
* 1: get the status code and check for cacheability.
|
|
*/
|
|
|
|
t->logs.logwait &= ~LW_RESP;
|
|
txn->status = strl2ui(rep->data + msg->sl.st.c, msg->sl.st.c_l);
|
|
|
|
n = rep->data[msg->sl.st.c] - '0';
|
|
if (n < 1 || n > 5)
|
|
n = 0;
|
|
|
|
t->srv->counters.p.http.rsp[n]++;
|
|
t->be->counters.p.http.rsp[n]++;
|
|
|
|
switch (txn->status) {
|
|
case 200:
|
|
case 203:
|
|
case 206:
|
|
case 300:
|
|
case 301:
|
|
case 410:
|
|
/* RFC2616 @13.4:
|
|
* "A response received with a status code of
|
|
* 200, 203, 206, 300, 301 or 410 MAY be stored
|
|
* by a cache (...) unless a cache-control
|
|
* directive prohibits caching."
|
|
*
|
|
* RFC2616 @9.5: POST method :
|
|
* "Responses to this method are not cacheable,
|
|
* unless the response includes appropriate
|
|
* Cache-Control or Expires header fields."
|
|
*/
|
|
if (likely(txn->meth != HTTP_METH_POST) &&
|
|
(t->be->options & (PR_O_CHK_CACHE|PR_O_COOK_NOC)))
|
|
txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* 2: we may need to capture headers
|
|
*/
|
|
if (unlikely((t->logs.logwait & LW_RSPHDR) && t->fe->rsp_cap))
|
|
capture_headers(rep->data + msg->som, &txn->hdr_idx,
|
|
txn->rsp.cap, t->fe->rsp_cap);
|
|
|
|
/*
|
|
* 3: we will have to evaluate the filters.
|
|
* As opposed to version 1.2, now they will be evaluated in the
|
|
* filters order and not in the header order. This means that
|
|
* each filter has to be validated among all headers.
|
|
*
|
|
* Filters are tried with ->be first, then with ->fe if it is
|
|
* different from ->be.
|
|
*/
|
|
|
|
t->flags &= ~SN_CONN_CLOSED; /* prepare for inspection */
|
|
|
|
cur_proxy = t->be;
|
|
while (1) {
|
|
struct proxy *rule_set = cur_proxy;
|
|
|
|
/* try headers filters */
|
|
if (rule_set->rsp_exp != NULL) {
|
|
if (apply_filters_to_response(t, rep, rule_set->rsp_exp) < 0) {
|
|
return_bad_resp:
|
|
if (t->srv)
|
|
t->srv->counters.failed_resp++;
|
|
cur_proxy->counters.failed_resp++;
|
|
return_srv_prx_502:
|
|
buffer_shutr_now(rep);
|
|
buffer_shutw_now(req);
|
|
rep->analysers = 0;
|
|
txn->status = 502;
|
|
stream_int_return(rep->cons, error_message(t, HTTP_ERR_502));
|
|
if (!(t->flags & SN_ERR_MASK))
|
|
t->flags |= SN_ERR_PRXCOND;
|
|
if (!(t->flags & SN_FINST_MASK))
|
|
t->flags |= SN_FINST_H;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* has the response been denied ? */
|
|
if (txn->flags & TX_SVDENY) {
|
|
if (t->srv)
|
|
t->srv->counters.failed_secu++;
|
|
|
|
cur_proxy->counters.denied_resp++;
|
|
if (t->listener->counters)
|
|
t->listener->counters->denied_resp++;
|
|
|
|
goto return_srv_prx_502;
|
|
}
|
|
|
|
/* We might have to check for "Connection:" */
|
|
if (((t->fe->options | t->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) &&
|
|
!(t->flags & SN_CONN_CLOSED) &&
|
|
txn->status >= 200) {
|
|
char *cur_ptr, *cur_end, *cur_next;
|
|
int cur_idx, old_idx, delta, val;
|
|
struct hdr_idx_elem *cur_hdr;
|
|
|
|
cur_next = rep->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
|
|
old_idx = 0;
|
|
|
|
while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
|
|
cur_hdr = &txn->hdr_idx.v[cur_idx];
|
|
cur_ptr = cur_next;
|
|
cur_end = cur_ptr + cur_hdr->len;
|
|
cur_next = cur_end + cur_hdr->cr + 1;
|
|
|
|
val = http_header_match2(cur_ptr, cur_end, "Connection", 10);
|
|
if (val) {
|
|
/* 3 possibilities :
|
|
* - we have already set Connection: close,
|
|
* so we remove this line.
|
|
* - we have not yet set Connection: close,
|
|
* but this line indicates close. We leave
|
|
* it untouched and set the flag.
|
|
* - we have not yet set Connection: close,
|
|
* and this line indicates non-close. We
|
|
* replace it.
|
|
*/
|
|
if (t->flags & SN_CONN_CLOSED) {
|
|
delta = buffer_replace2(rep, cur_ptr, cur_next, NULL, 0);
|
|
txn->rsp.eoh += delta;
|
|
cur_next += delta;
|
|
txn->hdr_idx.v[old_idx].next = cur_hdr->next;
|
|
txn->hdr_idx.used--;
|
|
cur_hdr->len = 0;
|
|
} else {
|
|
if (strncasecmp(cur_ptr + val, "close", 5) != 0) {
|
|
delta = buffer_replace2(rep, cur_ptr + val, cur_end,
|
|
"close", 5);
|
|
cur_next += delta;
|
|
cur_hdr->len += delta;
|
|
txn->rsp.eoh += delta;
|
|
}
|
|
t->flags |= SN_CONN_CLOSED;
|
|
}
|
|
}
|
|
old_idx = cur_idx;
|
|
}
|
|
}
|
|
|
|
/* add response headers from the rule sets in the same order */
|
|
for (cur_idx = 0; cur_idx < rule_set->nb_rspadd; cur_idx++) {
|
|
if (txn->status < 200)
|
|
break;
|
|
if (unlikely(http_header_add_tail(rep, &txn->rsp, &txn->hdr_idx,
|
|
rule_set->rsp_add[cur_idx])) < 0)
|
|
goto return_bad_resp;
|
|
}
|
|
|
|
/* check whether we're already working on the frontend */
|
|
if (cur_proxy == t->fe)
|
|
break;
|
|
cur_proxy = t->fe;
|
|
}
|
|
|
|
/*
|
|
* 4: check for server cookie.
|
|
*/
|
|
if ((t->be->cookie_name || t->be->appsession_name || t->fe->capture_name
|
|
|| (t->be->options & PR_O_CHK_CACHE)) && txn->status >= 200)
|
|
manage_server_side_cookies(t, rep);
|
|
|
|
|
|
/*
|
|
* 5: check for cache-control or pragma headers if required.
|
|
*/
|
|
if ((t->be->options & (PR_O_COOK_NOC | PR_O_CHK_CACHE)) != 0 && txn->status >= 200)
|
|
check_response_for_cacheability(t, rep);
|
|
|
|
/*
|
|
* 6: add server cookie in the response if needed
|
|
*/
|
|
if ((t->srv) && !(t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_INS) &&
|
|
(!(t->be->options & PR_O_COOK_POST) || (txn->meth == HTTP_METH_POST)) &&
|
|
txn->status >= 200) {
|
|
int len;
|
|
|
|
/* the server is known, it's not the one the client requested, we have to
|
|
* insert a set-cookie here, except if we want to insert only on POST
|
|
* requests and this one isn't. Note that servers which don't have cookies
|
|
* (eg: some backup servers) will return a full cookie removal request.
|
|
*/
|
|
len = sprintf(trash, "Set-Cookie: %s=%s; path=/",
|
|
t->be->cookie_name,
|
|
t->srv->cookie ? t->srv->cookie : "; Expires=Thu, 01-Jan-1970 00:00:01 GMT");
|
|
|
|
if (t->be->cookie_domain)
|
|
len += sprintf(trash+len, "; domain=%s", t->be->cookie_domain);
|
|
|
|
if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
|
|
trash, len)) < 0)
|
|
goto return_bad_resp;
|
|
txn->flags |= TX_SCK_INSERTED;
|
|
|
|
/* Here, we will tell an eventual cache on the client side that we don't
|
|
* want it to cache this reply because HTTP/1.0 caches also cache cookies !
|
|
* Some caches understand the correct form: 'no-cache="set-cookie"', but
|
|
* others don't (eg: apache <= 1.3.26). So we use 'private' instead.
|
|
*/
|
|
if ((t->be->options & PR_O_COOK_NOC) && (txn->flags & TX_CACHEABLE)) {
|
|
|
|
txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
|
|
|
|
if (unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
|
|
"Cache-control: private", 22)) < 0)
|
|
goto return_bad_resp;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 7: check if result will be cacheable with a cookie.
|
|
* We'll block the response if security checks have caught
|
|
* nasty things such as a cacheable cookie.
|
|
*/
|
|
if (((txn->flags & (TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) ==
|
|
(TX_CACHEABLE | TX_CACHE_COOK | TX_SCK_ANY)) &&
|
|
(t->be->options & PR_O_CHK_CACHE) &&
|
|
txn->status >= 200) {
|
|
|
|
/* we're in presence of a cacheable response containing
|
|
* a set-cookie header. We'll block it as requested by
|
|
* the 'checkcache' option, and send an alert.
|
|
*/
|
|
if (t->srv)
|
|
t->srv->counters.failed_secu++;
|
|
|
|
cur_proxy->counters.denied_resp++;
|
|
if (t->listener->counters)
|
|
t->listener->counters->denied_resp++;
|
|
|
|
Alert("Blocking cacheable cookie in response from instance %s, server %s.\n",
|
|
t->be->id, t->srv?t->srv->id:"<dispatch>");
|
|
send_log(t->be, LOG_ALERT,
|
|
"Blocking cacheable cookie in response from instance %s, server %s.\n",
|
|
t->be->id, t->srv?t->srv->id:"<dispatch>");
|
|
goto return_srv_prx_502;
|
|
}
|
|
|
|
/*
|
|
* 8: add "Connection: close" if needed and not yet set.
|
|
* Note that we do not need to add it in case of HTTP/1.0.
|
|
*/
|
|
if (!(t->flags & SN_CONN_CLOSED) &&
|
|
((t->fe->options | t->be->options) & (PR_O_HTTP_CLOSE|PR_O_FORCE_CLO)) &&
|
|
txn->status >= 200) {
|
|
if ((unlikely(msg->sl.st.v_l != 8) ||
|
|
unlikely(req->data[msg->som + 7] != '0')) &&
|
|
unlikely(http_header_add_tail2(rep, &txn->rsp, &txn->hdr_idx,
|
|
"Connection: close", 17)) < 0)
|
|
goto return_bad_resp;
|
|
t->flags |= SN_CONN_CLOSED;
|
|
}
|
|
|
|
/*
|
|
* 9: we may be facing a 1xx response (100 continue, 101 switching protocols),
|
|
* in which case this is not the right response, and we're waiting for the
|
|
* next one. Let's allow this response to go to the client and wait for the
|
|
* next one.
|
|
*/
|
|
if (txn->status < 200) {
|
|
hdr_idx_init(&txn->hdr_idx);
|
|
buffer_forward(rep, rep->lr - (rep->data + msg->som));
|
|
msg->msg_state = HTTP_MSG_RPBEFORE;
|
|
txn->status = 0;
|
|
rep->analysers |= AN_RTR_HTTP_HDR;
|
|
goto next_response;
|
|
}
|
|
|
|
/*************************************************************
|
|
* OK, that's finished for the headers. We have done what we *
|
|
* could. Let's switch to the DATA state. *
|
|
************************************************************/
|
|
|
|
buffer_set_rlim(rep, rep->size); /* no more rewrite needed */
|
|
t->logs.t_data = tv_ms_elapsed(&t->logs.tv_accept, &now);
|
|
|
|
/* if the user wants to log as soon as possible, without counting
|
|
* bytes from the server, then this is the right moment. We have
|
|
* to temporarily assign bytes_out to log what we currently have.
|
|
*/
|
|
if (t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
|
|
t->logs.t_close = t->logs.t_data; /* to get a valid end date */
|
|
t->logs.bytes_out = txn->rsp.eoh;
|
|
t->do_log(t);
|
|
t->logs.bytes_out = 0;
|
|
}
|
|
|
|
/* Note: we must not try to cheat by jumping directly to DATA,
|
|
* otherwise we would not let the client side wake up.
|
|
*/
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Note: eventhough nobody should set an unknown flag, clearing them right now will
|
|
* probably reduce one day's debugging session.
|
|
*/
|
|
#ifdef DEBUG_DEV
|
|
if (rep->analysers & ~(AN_RTR_HTTP_HDR)) {
|
|
fprintf(stderr, "FIXME !!!! unknown analysers flags %s:%d = 0x%08X\n",
|
|
__FILE__, __LINE__, rep->analysers);
|
|
ABORT_NOW();
|
|
}
|
|
#endif
|
|
rep->analysers &= AN_RTR_HTTP_HDR;
|
|
return 0;
|
|
}
|
|
|
|
/* Iterate the same filter through all request headers.
|
|
* Returns 1 if this filter can be stopped upon return, otherwise 0.
|
|
* Since it can manage the switch to another backend, it updates the per-proxy
|
|
* DENY stats.
|
|
*/
|
|
int apply_filter_to_req_headers(struct session *t, struct buffer *req, struct hdr_exp *exp)
|
|
{
|
|
char term;
|
|
char *cur_ptr, *cur_end, *cur_next;
|
|
int cur_idx, old_idx, last_hdr;
|
|
struct http_txn *txn = &t->txn;
|
|
struct hdr_idx_elem *cur_hdr;
|
|
int len, delta;
|
|
|
|
last_hdr = 0;
|
|
|
|
cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
|
|
old_idx = 0;
|
|
|
|
while (!last_hdr) {
|
|
if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
|
|
return 1;
|
|
else if (unlikely(txn->flags & TX_CLALLOW) &&
|
|
(exp->action == ACT_ALLOW ||
|
|
exp->action == ACT_DENY ||
|
|
exp->action == ACT_TARPIT))
|
|
return 0;
|
|
|
|
cur_idx = txn->hdr_idx.v[old_idx].next;
|
|
if (!cur_idx)
|
|
break;
|
|
|
|
cur_hdr = &txn->hdr_idx.v[cur_idx];
|
|
cur_ptr = cur_next;
|
|
cur_end = cur_ptr + cur_hdr->len;
|
|
cur_next = cur_end + cur_hdr->cr + 1;
|
|
|
|
/* Now we have one header between cur_ptr and cur_end,
|
|
* and the next header starts at cur_next.
|
|
*/
|
|
|
|
/* The annoying part is that pattern matching needs
|
|
* that we modify the contents to null-terminate all
|
|
* strings before testing them.
|
|
*/
|
|
|
|
term = *cur_end;
|
|
*cur_end = '\0';
|
|
|
|
if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
|
|
switch (exp->action) {
|
|
case ACT_SETBE:
|
|
/* It is not possible to jump a second time.
|
|
* FIXME: should we return an HTTP/500 here so that
|
|
* the admin knows there's a problem ?
|
|
*/
|
|
if (t->be != t->fe)
|
|
break;
|
|
|
|
/* Swithing Proxy */
|
|
session_set_backend(t, (struct proxy *)exp->replace);
|
|
last_hdr = 1;
|
|
break;
|
|
|
|
case ACT_ALLOW:
|
|
txn->flags |= TX_CLALLOW;
|
|
last_hdr = 1;
|
|
break;
|
|
|
|
case ACT_DENY:
|
|
txn->flags |= TX_CLDENY;
|
|
last_hdr = 1;
|
|
|
|
t->be->counters.denied_req++;
|
|
if (t->listener->counters)
|
|
t->listener->counters->denied_resp++;
|
|
|
|
break;
|
|
|
|
case ACT_TARPIT:
|
|
txn->flags |= TX_CLTARPIT;
|
|
last_hdr = 1;
|
|
|
|
t->be->counters.denied_req++;
|
|
if (t->listener->counters)
|
|
t->listener->counters->denied_resp++;
|
|
|
|
break;
|
|
|
|
case ACT_REPLACE:
|
|
len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
|
|
delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
|
|
/* FIXME: if the user adds a newline in the replacement, the
|
|
* index will not be recalculated for now, and the new line
|
|
* will not be counted as a new header.
|
|
*/
|
|
|
|
cur_end += delta;
|
|
cur_next += delta;
|
|
cur_hdr->len += delta;
|
|
txn->req.eoh += delta;
|
|
break;
|
|
|
|
case ACT_REMOVE:
|
|
delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
|
|
cur_next += delta;
|
|
|
|
/* FIXME: this should be a separate function */
|
|
txn->req.eoh += delta;
|
|
txn->hdr_idx.v[old_idx].next = cur_hdr->next;
|
|
txn->hdr_idx.used--;
|
|
cur_hdr->len = 0;
|
|
cur_end = NULL; /* null-term has been rewritten */
|
|
break;
|
|
|
|
}
|
|
}
|
|
if (cur_end)
|
|
*cur_end = term; /* restore the string terminator */
|
|
|
|
/* keep the link from this header to next one in case of later
|
|
* removal of next header.
|
|
*/
|
|
old_idx = cur_idx;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Apply the filter to the request line.
|
|
* Returns 0 if nothing has been done, 1 if the filter has been applied,
|
|
* or -1 if a replacement resulted in an invalid request line.
|
|
* Since it can manage the switch to another backend, it updates the per-proxy
|
|
* DENY stats.
|
|
*/
|
|
int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp)
|
|
{
|
|
char term;
|
|
char *cur_ptr, *cur_end;
|
|
int done;
|
|
struct http_txn *txn = &t->txn;
|
|
int len, delta;
|
|
|
|
|
|
if (unlikely(txn->flags & (TX_CLDENY | TX_CLTARPIT)))
|
|
return 1;
|
|
else if (unlikely(txn->flags & TX_CLALLOW) &&
|
|
(exp->action == ACT_ALLOW ||
|
|
exp->action == ACT_DENY ||
|
|
exp->action == ACT_TARPIT))
|
|
return 0;
|
|
else if (exp->action == ACT_REMOVE)
|
|
return 0;
|
|
|
|
done = 0;
|
|
|
|
cur_ptr = req->data + txn->req.som; /* should be equal to txn->sol */
|
|
cur_end = cur_ptr + txn->req.sl.rq.l;
|
|
|
|
/* Now we have the request line between cur_ptr and cur_end */
|
|
|
|
/* The annoying part is that pattern matching needs
|
|
* that we modify the contents to null-terminate all
|
|
* strings before testing them.
|
|
*/
|
|
|
|
term = *cur_end;
|
|
*cur_end = '\0';
|
|
|
|
if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
|
|
switch (exp->action) {
|
|
case ACT_SETBE:
|
|
/* It is not possible to jump a second time.
|
|
* FIXME: should we return an HTTP/500 here so that
|
|
* the admin knows there's a problem ?
|
|
*/
|
|
if (t->be != t->fe)
|
|
break;
|
|
|
|
/* Swithing Proxy */
|
|
session_set_backend(t, (struct proxy *)exp->replace);
|
|
done = 1;
|
|
break;
|
|
|
|
case ACT_ALLOW:
|
|
txn->flags |= TX_CLALLOW;
|
|
done = 1;
|
|
break;
|
|
|
|
case ACT_DENY:
|
|
txn->flags |= TX_CLDENY;
|
|
|
|
t->be->counters.denied_req++;
|
|
if (t->listener->counters)
|
|
t->listener->counters->denied_resp++;
|
|
|
|
done = 1;
|
|
break;
|
|
|
|
case ACT_TARPIT:
|
|
txn->flags |= TX_CLTARPIT;
|
|
|
|
t->be->counters.denied_req++;
|
|
if (t->listener->counters)
|
|
t->listener->counters->denied_resp++;
|
|
|
|
done = 1;
|
|
break;
|
|
|
|
case ACT_REPLACE:
|
|
*cur_end = term; /* restore the string terminator */
|
|
len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
|
|
delta = buffer_replace2(req, cur_ptr, cur_end, trash, len);
|
|
/* FIXME: if the user adds a newline in the replacement, the
|
|
* index will not be recalculated for now, and the new line
|
|
* will not be counted as a new header.
|
|
*/
|
|
|
|
txn->req.eoh += delta;
|
|
cur_end += delta;
|
|
|
|
txn->req.sol = req->data + txn->req.som; /* should be equal to txn->sol */
|
|
cur_end = (char *)http_parse_reqline(&txn->req, req->data,
|
|
HTTP_MSG_RQMETH,
|
|
cur_ptr, cur_end + 1,
|
|
NULL, NULL);
|
|
if (unlikely(!cur_end))
|
|
return -1;
|
|
|
|
/* we have a full request and we know that we have either a CR
|
|
* or an LF at <ptr>.
|
|
*/
|
|
txn->meth = find_http_meth(cur_ptr, txn->req.sl.rq.m_l);
|
|
hdr_idx_set_start(&txn->hdr_idx, txn->req.sl.rq.l, *cur_end == '\r');
|
|
/* there is no point trying this regex on headers */
|
|
return 1;
|
|
}
|
|
}
|
|
*cur_end = term; /* restore the string terminator */
|
|
return done;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Apply all the req filters <exp> to all headers in buffer <req> of session <t>.
|
|
* Returns 0 if everything is alright, or -1 in case a replacement lead to an
|
|
* unparsable request. Since it can manage the switch to another backend, it
|
|
* updates the per-proxy DENY stats.
|
|
*/
|
|
int apply_filters_to_request(struct session *t, struct buffer *req, struct hdr_exp *exp)
|
|
{
|
|
struct http_txn *txn = &t->txn;
|
|
/* iterate through the filters in the outer loop */
|
|
while (exp && !(txn->flags & (TX_CLDENY|TX_CLTARPIT))) {
|
|
int ret;
|
|
|
|
/*
|
|
* The interleaving of transformations and verdicts
|
|
* makes it difficult to decide to continue or stop
|
|
* the evaluation.
|
|
*/
|
|
|
|
if ((txn->flags & TX_CLALLOW) &&
|
|
(exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
|
|
exp->action == ACT_TARPIT || exp->action == ACT_PASS)) {
|
|
exp = exp->next;
|
|
continue;
|
|
}
|
|
|
|
/* Apply the filter to the request line. */
|
|
ret = apply_filter_to_req_line(t, req, exp);
|
|
if (unlikely(ret < 0))
|
|
return -1;
|
|
|
|
if (likely(ret == 0)) {
|
|
/* The filter did not match the request, it can be
|
|
* iterated through all headers.
|
|
*/
|
|
apply_filter_to_req_headers(t, req, exp);
|
|
}
|
|
exp = exp->next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Try to retrieve the server associated to the appsession.
|
|
* If the server is found, it's assigned to the session.
|
|
*/
|
|
void manage_client_side_appsession(struct session *t, const char *buf) {
|
|
struct http_txn *txn = &t->txn;
|
|
appsess *asession = NULL;
|
|
char *sessid_temp = NULL;
|
|
|
|
if (t->be->options2 & PR_O2_AS_REQL) {
|
|
/* request-learn option is enabled : store the sessid in the session for future use */
|
|
if (t->sessid != NULL) {
|
|
/* free previously allocated memory as we don't need the session id found in the URL anymore */
|
|
pool_free2(apools.sessid, t->sessid);
|
|
}
|
|
|
|
if ((t->sessid = pool_alloc2(apools.sessid)) == NULL) {
|
|
Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
|
|
send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
|
|
return;
|
|
}
|
|
|
|
memcpy(t->sessid, buf, t->be->appsession_len);
|
|
t->sessid[t->be->appsession_len] = 0;
|
|
}
|
|
|
|
if ((sessid_temp = pool_alloc2(apools.sessid)) == NULL) {
|
|
Alert("Not enough memory process_cli():asession->sessid:malloc().\n");
|
|
send_log(t->be, LOG_ALERT, "Not enough memory process_cli():asession->sessid:malloc().\n");
|
|
return;
|
|
}
|
|
|
|
memcpy(sessid_temp, buf, t->be->appsession_len);
|
|
sessid_temp[t->be->appsession_len] = 0;
|
|
|
|
asession = appsession_hash_lookup(&(t->be->htbl_proxy), sessid_temp);
|
|
/* free previously allocated memory */
|
|
pool_free2(apools.sessid, sessid_temp);
|
|
|
|
if (asession != NULL) {
|
|
asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
|
|
if (!(t->be->options2 & PR_O2_AS_REQL))
|
|
asession->request_count++;
|
|
|
|
if (asession->serverid != NULL) {
|
|
struct server *srv = t->be->srv;
|
|
while (srv) {
|
|
if (strcmp(srv->id, asession->serverid) == 0) {
|
|
if (srv->state & SRV_RUNNING || t->be->options & PR_O_PERSIST) {
|
|
/* we found the server and it's usable */
|
|
txn->flags &= ~TX_CK_MASK;
|
|
txn->flags |= TX_CK_VALID;
|
|
t->flags |= SN_DIRECT | SN_ASSIGNED;
|
|
t->srv = srv;
|
|
break;
|
|
} else {
|
|
txn->flags &= ~TX_CK_MASK;
|
|
txn->flags |= TX_CK_DOWN;
|
|
}
|
|
}
|
|
srv = srv->next;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Manage client-side cookie. It can impact performance by about 2% so it is
|
|
* desirable to call it only when needed.
|
|
*/
|
|
void manage_client_side_cookies(struct session *t, struct buffer *req)
|
|
{
|
|
struct http_txn *txn = &t->txn;
|
|
char *p1, *p2, *p3, *p4;
|
|
char *del_colon, *del_cookie, *colon;
|
|
int app_cookies;
|
|
|
|
char *cur_ptr, *cur_end, *cur_next;
|
|
int cur_idx, old_idx;
|
|
|
|
/* Iterate through the headers.
|
|
* we start with the start line.
|
|
*/
|
|
old_idx = 0;
|
|
cur_next = req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
|
|
|
|
while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
|
|
struct hdr_idx_elem *cur_hdr;
|
|
int val;
|
|
|
|
cur_hdr = &txn->hdr_idx.v[cur_idx];
|
|
cur_ptr = cur_next;
|
|
cur_end = cur_ptr + cur_hdr->len;
|
|
cur_next = cur_end + cur_hdr->cr + 1;
|
|
|
|
/* We have one full header between cur_ptr and cur_end, and the
|
|
* next header starts at cur_next. We're only interested in
|
|
* "Cookie:" headers.
|
|
*/
|
|
|
|
val = http_header_match2(cur_ptr, cur_end, "Cookie", 6);
|
|
if (!val) {
|
|
old_idx = cur_idx;
|
|
continue;
|
|
}
|
|
|
|
/* Now look for cookies. Conforming to RFC2109, we have to support
|
|
* attributes whose name begin with a '$', and associate them with
|
|
* the right cookie, if we want to delete this cookie.
|
|
* So there are 3 cases for each cookie read :
|
|
* 1) it's a special attribute, beginning with a '$' : ignore it.
|
|
* 2) it's a server id cookie that we *MAY* want to delete : save
|
|
* some pointers on it (last semi-colon, beginning of cookie...)
|
|
* 3) it's an application cookie : we *MAY* have to delete a previous
|
|
* "special" cookie.
|
|
* At the end of loop, if a "special" cookie remains, we may have to
|
|
* remove it. If no application cookie persists in the header, we
|
|
* *MUST* delete it
|
|
*/
|
|
|
|
colon = p1 = cur_ptr + val; /* first non-space char after 'Cookie:' */
|
|
|
|
/* del_cookie == NULL => nothing to be deleted */
|
|
del_colon = del_cookie = NULL;
|
|
app_cookies = 0;
|
|
|
|
while (p1 < cur_end) {
|
|
/* skip spaces and colons, but keep an eye on these ones */
|
|
while (p1 < cur_end) {
|
|
if (*p1 == ';' || *p1 == ',')
|
|
colon = p1;
|
|
else if (!isspace((unsigned char)*p1))
|
|
break;
|
|
p1++;
|
|
}
|
|
|
|
if (p1 == cur_end)
|
|
break;
|
|
|
|
/* p1 is at the beginning of the cookie name */
|
|
p2 = p1;
|
|
while (p2 < cur_end && *p2 != '=')
|
|
p2++;
|
|
|
|
if (p2 == cur_end)
|
|
break;
|
|
|
|
p3 = p2 + 1; /* skips the '=' sign */
|
|
if (p3 == cur_end)
|
|
break;
|
|
|
|
p4 = p3;
|
|
while (p4 < cur_end && !isspace((unsigned char)*p4) && *p4 != ';' && *p4 != ',')
|
|
p4++;
|
|
|
|
/* here, we have the cookie name between p1 and p2,
|
|
* and its value between p3 and p4.
|
|
* we can process it :
|
|
*
|
|
* Cookie: NAME=VALUE;
|
|
* | || || |
|
|
* | || || +--> p4
|
|
* | || |+-------> p3
|
|
* | || +--------> p2
|
|
* | |+------------> p1
|
|
* | +-------------> colon
|
|
* +--------------------> cur_ptr
|
|
*/
|
|
|
|
if (*p1 == '$') {
|
|
/* skip this one */
|
|
}
|
|
else {
|
|
/* first, let's see if we want to capture it */
|
|
if (t->fe->capture_name != NULL &&
|
|
txn->cli_cookie == NULL &&
|
|
(p4 - p1 >= t->fe->capture_namelen) &&
|
|
memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
|
|
int log_len = p4 - p1;
|
|
|
|
if ((txn->cli_cookie = pool_alloc2(pool2_capture)) == NULL) {
|
|
Alert("HTTP logging : out of memory.\n");
|
|
} else {
|
|
if (log_len > t->fe->capture_len)
|
|
log_len = t->fe->capture_len;
|
|
memcpy(txn->cli_cookie, p1, log_len);
|
|
txn->cli_cookie[log_len] = 0;
|
|
}
|
|
}
|
|
|
|
if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
|
|
(memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
|
|
/* Cool... it's the right one */
|
|
struct server *srv = t->be->srv;
|
|
char *delim;
|
|
|
|
/* if we're in cookie prefix mode, we'll search the delimitor so that we
|
|
* have the server ID betweek p3 and delim, and the original cookie between
|
|
* delim+1 and p4. Otherwise, delim==p4 :
|
|
*
|
|
* Cookie: NAME=SRV~VALUE;
|
|
* | || || | |
|
|
* | || || | +--> p4
|
|
* | || || +--------> delim
|
|
* | || |+-----------> p3
|
|
* | || +------------> p2
|
|
* | |+----------------> p1
|
|
* | +-----------------> colon
|
|
* +------------------------> cur_ptr
|
|
*/
|
|
|
|
if (t->be->options & PR_O_COOK_PFX) {
|
|
for (delim = p3; delim < p4; delim++)
|
|
if (*delim == COOKIE_DELIM)
|
|
break;
|
|
}
|
|
else
|
|
delim = p4;
|
|
|
|
|
|
/* Here, we'll look for the first running server which supports the cookie.
|
|
* This allows to share a same cookie between several servers, for example
|
|
* to dedicate backup servers to specific servers only.
|
|
* However, to prevent clients from sticking to cookie-less backup server
|
|
* when they have incidentely learned an empty cookie, we simply ignore
|
|
* empty cookies and mark them as invalid.
|
|
*/
|
|
if (delim == p3)
|
|
srv = NULL;
|
|
|
|
while (srv) {
|
|
if (srv->cookie && (srv->cklen == delim - p3) &&
|
|
!memcmp(p3, srv->cookie, delim - p3)) {
|
|
if (srv->state & SRV_RUNNING || t->be->options & PR_O_PERSIST) {
|
|
/* we found the server and it's usable */
|
|
txn->flags &= ~TX_CK_MASK;
|
|
txn->flags |= TX_CK_VALID;
|
|
t->flags |= SN_DIRECT | SN_ASSIGNED;
|
|
t->srv = srv;
|
|
break;
|
|
} else {
|
|
/* we found a server, but it's down */
|
|
txn->flags &= ~TX_CK_MASK;
|
|
txn->flags |= TX_CK_DOWN;
|
|
}
|
|
}
|
|
srv = srv->next;
|
|
}
|
|
|
|
if (!srv && !(txn->flags & TX_CK_DOWN)) {
|
|
/* no server matched this cookie */
|
|
txn->flags &= ~TX_CK_MASK;
|
|
txn->flags |= TX_CK_INVALID;
|
|
}
|
|
|
|
/* depending on the cookie mode, we may have to either :
|
|
* - delete the complete cookie if we're in insert+indirect mode, so that
|
|
* the server never sees it ;
|
|
* - remove the server id from the cookie value, and tag the cookie as an
|
|
* application cookie so that it does not get accidentely removed later,
|
|
* if we're in cookie prefix mode
|
|
*/
|
|
if ((t->be->options & PR_O_COOK_PFX) && (delim != p4)) {
|
|
int delta; /* negative */
|
|
|
|
delta = buffer_replace2(req, p3, delim + 1, NULL, 0);
|
|
p4 += delta;
|
|
cur_end += delta;
|
|
cur_next += delta;
|
|
cur_hdr->len += delta;
|
|
txn->req.eoh += delta;
|
|
|
|
del_cookie = del_colon = NULL;
|
|
app_cookies++; /* protect the header from deletion */
|
|
}
|
|
else if (del_cookie == NULL &&
|
|
(t->be->options & (PR_O_COOK_INS | PR_O_COOK_IND)) == (PR_O_COOK_INS | PR_O_COOK_IND)) {
|
|
del_cookie = p1;
|
|
del_colon = colon;
|
|
}
|
|
} else {
|
|
/* now we know that we must keep this cookie since it's
|
|
* not ours. But if we wanted to delete our cookie
|
|
* earlier, we cannot remove the complete header, but we
|
|
* can remove the previous block itself.
|
|
*/
|
|
app_cookies++;
|
|
|
|
if (del_cookie != NULL) {
|
|
int delta; /* negative */
|
|
|
|
delta = buffer_replace2(req, del_cookie, p1, NULL, 0);
|
|
p4 += delta;
|
|
cur_end += delta;
|
|
cur_next += delta;
|
|
cur_hdr->len += delta;
|
|
txn->req.eoh += delta;
|
|
del_cookie = del_colon = NULL;
|
|
}
|
|
}
|
|
|
|
if ((t->be->appsession_name != NULL) &&
|
|
(memcmp(p1, t->be->appsession_name, p2 - p1) == 0)) {
|
|
/* first, let's see if the cookie is our appcookie*/
|
|
|
|
/* Cool... it's the right one */
|
|
manage_client_side_appsession(t, p3);
|
|
#if defined(DEBUG_HASH)
|
|
Alert("manage_client_side_cookies\n");
|
|
appsession_hash_dump(&(t->be->htbl_proxy));
|
|
#endif
|
|
}/* end if ((t->proxy->appsession_name != NULL) ... */
|
|
}
|
|
|
|
/* we'll have to look for another cookie ... */
|
|
p1 = p4;
|
|
} /* while (p1 < cur_end) */
|
|
|
|
/* There's no more cookie on this line.
|
|
* We may have marked the last one(s) for deletion.
|
|
* We must do this now in two ways :
|
|
* - if there is no app cookie, we simply delete the header ;
|
|
* - if there are app cookies, we must delete the end of the
|
|
* string properly, including the colon/semi-colon before
|
|
* the cookie name.
|
|
*/
|
|
if (del_cookie != NULL) {
|
|
int delta;
|
|
if (app_cookies) {
|
|
delta = buffer_replace2(req, del_colon, cur_end, NULL, 0);
|
|
cur_end = del_colon;
|
|
cur_hdr->len += delta;
|
|
} else {
|
|
delta = buffer_replace2(req, cur_ptr, cur_next, NULL, 0);
|
|
|
|
/* FIXME: this should be a separate function */
|
|
txn->hdr_idx.v[old_idx].next = cur_hdr->next;
|
|
txn->hdr_idx.used--;
|
|
cur_hdr->len = 0;
|
|
}
|
|
cur_next += delta;
|
|
txn->req.eoh += delta;
|
|
}
|
|
|
|
/* keep the link from this header to next one */
|
|
old_idx = cur_idx;
|
|
} /* end of cookie processing on this header */
|
|
}
|
|
|
|
|
|
/* Iterate the same filter through all response headers contained in <rtr>.
|
|
* Returns 1 if this filter can be stopped upon return, otherwise 0.
|
|
*/
|
|
int apply_filter_to_resp_headers(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
|
|
{
|
|
char term;
|
|
char *cur_ptr, *cur_end, *cur_next;
|
|
int cur_idx, old_idx, last_hdr;
|
|
struct http_txn *txn = &t->txn;
|
|
struct hdr_idx_elem *cur_hdr;
|
|
int len, delta;
|
|
|
|
last_hdr = 0;
|
|
|
|
cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
|
|
old_idx = 0;
|
|
|
|
while (!last_hdr) {
|
|
if (unlikely(txn->flags & TX_SVDENY))
|
|
return 1;
|
|
else if (unlikely(txn->flags & TX_SVALLOW) &&
|
|
(exp->action == ACT_ALLOW ||
|
|
exp->action == ACT_DENY))
|
|
return 0;
|
|
|
|
cur_idx = txn->hdr_idx.v[old_idx].next;
|
|
if (!cur_idx)
|
|
break;
|
|
|
|
cur_hdr = &txn->hdr_idx.v[cur_idx];
|
|
cur_ptr = cur_next;
|
|
cur_end = cur_ptr + cur_hdr->len;
|
|
cur_next = cur_end + cur_hdr->cr + 1;
|
|
|
|
/* Now we have one header between cur_ptr and cur_end,
|
|
* and the next header starts at cur_next.
|
|
*/
|
|
|
|
/* The annoying part is that pattern matching needs
|
|
* that we modify the contents to null-terminate all
|
|
* strings before testing them.
|
|
*/
|
|
|
|
term = *cur_end;
|
|
*cur_end = '\0';
|
|
|
|
if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
|
|
switch (exp->action) {
|
|
case ACT_ALLOW:
|
|
txn->flags |= TX_SVALLOW;
|
|
last_hdr = 1;
|
|
break;
|
|
|
|
case ACT_DENY:
|
|
txn->flags |= TX_SVDENY;
|
|
last_hdr = 1;
|
|
break;
|
|
|
|
case ACT_REPLACE:
|
|
len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
|
|
delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
|
|
/* FIXME: if the user adds a newline in the replacement, the
|
|
* index will not be recalculated for now, and the new line
|
|
* will not be counted as a new header.
|
|
*/
|
|
|
|
cur_end += delta;
|
|
cur_next += delta;
|
|
cur_hdr->len += delta;
|
|
txn->rsp.eoh += delta;
|
|
break;
|
|
|
|
case ACT_REMOVE:
|
|
delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
|
|
cur_next += delta;
|
|
|
|
/* FIXME: this should be a separate function */
|
|
txn->rsp.eoh += delta;
|
|
txn->hdr_idx.v[old_idx].next = cur_hdr->next;
|
|
txn->hdr_idx.used--;
|
|
cur_hdr->len = 0;
|
|
cur_end = NULL; /* null-term has been rewritten */
|
|
break;
|
|
|
|
}
|
|
}
|
|
if (cur_end)
|
|
*cur_end = term; /* restore the string terminator */
|
|
|
|
/* keep the link from this header to next one in case of later
|
|
* removal of next header.
|
|
*/
|
|
old_idx = cur_idx;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Apply the filter to the status line in the response buffer <rtr>.
|
|
* Returns 0 if nothing has been done, 1 if the filter has been applied,
|
|
* or -1 if a replacement resulted in an invalid status line.
|
|
*/
|
|
int apply_filter_to_sts_line(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
|
|
{
|
|
char term;
|
|
char *cur_ptr, *cur_end;
|
|
int done;
|
|
struct http_txn *txn = &t->txn;
|
|
int len, delta;
|
|
|
|
|
|
if (unlikely(txn->flags & TX_SVDENY))
|
|
return 1;
|
|
else if (unlikely(txn->flags & TX_SVALLOW) &&
|
|
(exp->action == ACT_ALLOW ||
|
|
exp->action == ACT_DENY))
|
|
return 0;
|
|
else if (exp->action == ACT_REMOVE)
|
|
return 0;
|
|
|
|
done = 0;
|
|
|
|
cur_ptr = rtr->data + txn->rsp.som; /* should be equal to txn->sol */
|
|
cur_end = cur_ptr + txn->rsp.sl.rq.l;
|
|
|
|
/* Now we have the status line between cur_ptr and cur_end */
|
|
|
|
/* The annoying part is that pattern matching needs
|
|
* that we modify the contents to null-terminate all
|
|
* strings before testing them.
|
|
*/
|
|
|
|
term = *cur_end;
|
|
*cur_end = '\0';
|
|
|
|
if (regexec(exp->preg, cur_ptr, MAX_MATCH, pmatch, 0) == 0) {
|
|
switch (exp->action) {
|
|
case ACT_ALLOW:
|
|
txn->flags |= TX_SVALLOW;
|
|
done = 1;
|
|
break;
|
|
|
|
case ACT_DENY:
|
|
txn->flags |= TX_SVDENY;
|
|
done = 1;
|
|
break;
|
|
|
|
case ACT_REPLACE:
|
|
*cur_end = term; /* restore the string terminator */
|
|
len = exp_replace(trash, cur_ptr, exp->replace, pmatch);
|
|
delta = buffer_replace2(rtr, cur_ptr, cur_end, trash, len);
|
|
/* FIXME: if the user adds a newline in the replacement, the
|
|
* index will not be recalculated for now, and the new line
|
|
* will not be counted as a new header.
|
|
*/
|
|
|
|
txn->rsp.eoh += delta;
|
|
cur_end += delta;
|
|
|
|
txn->rsp.sol = rtr->data + txn->rsp.som; /* should be equal to txn->sol */
|
|
cur_end = (char *)http_parse_stsline(&txn->rsp, rtr->data,
|
|
HTTP_MSG_RPVER,
|
|
cur_ptr, cur_end + 1,
|
|
NULL, NULL);
|
|
if (unlikely(!cur_end))
|
|
return -1;
|
|
|
|
/* we have a full respnse and we know that we have either a CR
|
|
* or an LF at <ptr>.
|
|
*/
|
|
txn->status = strl2ui(rtr->data + txn->rsp.sl.st.c, txn->rsp.sl.st.c_l);
|
|
hdr_idx_set_start(&txn->hdr_idx, txn->rsp.sl.rq.l, *cur_end == '\r');
|
|
/* there is no point trying this regex on headers */
|
|
return 1;
|
|
}
|
|
}
|
|
*cur_end = term; /* restore the string terminator */
|
|
return done;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Apply all the resp filters <exp> to all headers in buffer <rtr> of session <t>.
|
|
* Returns 0 if everything is alright, or -1 in case a replacement lead to an
|
|
* unparsable response.
|
|
*/
|
|
int apply_filters_to_response(struct session *t, struct buffer *rtr, struct hdr_exp *exp)
|
|
{
|
|
struct http_txn *txn = &t->txn;
|
|
/* iterate through the filters in the outer loop */
|
|
while (exp && !(txn->flags & TX_SVDENY)) {
|
|
int ret;
|
|
|
|
/*
|
|
* The interleaving of transformations and verdicts
|
|
* makes it difficult to decide to continue or stop
|
|
* the evaluation.
|
|
*/
|
|
|
|
if ((txn->flags & TX_SVALLOW) &&
|
|
(exp->action == ACT_ALLOW || exp->action == ACT_DENY ||
|
|
exp->action == ACT_PASS)) {
|
|
exp = exp->next;
|
|
continue;
|
|
}
|
|
|
|
/* Apply the filter to the status line. */
|
|
ret = apply_filter_to_sts_line(t, rtr, exp);
|
|
if (unlikely(ret < 0))
|
|
return -1;
|
|
|
|
if (likely(ret == 0)) {
|
|
/* The filter did not match the response, it can be
|
|
* iterated through all headers.
|
|
*/
|
|
apply_filter_to_resp_headers(t, rtr, exp);
|
|
}
|
|
exp = exp->next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Manage server-side cookies. It can impact performance by about 2% so it is
|
|
* desirable to call it only when needed.
|
|
*/
|
|
void manage_server_side_cookies(struct session *t, struct buffer *rtr)
|
|
{
|
|
struct http_txn *txn = &t->txn;
|
|
char *p1, *p2, *p3, *p4;
|
|
|
|
char *cur_ptr, *cur_end, *cur_next;
|
|
int cur_idx, old_idx, delta;
|
|
|
|
/* Iterate through the headers.
|
|
* we start with the start line.
|
|
*/
|
|
old_idx = 0;
|
|
cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
|
|
|
|
while ((cur_idx = txn->hdr_idx.v[old_idx].next)) {
|
|
struct hdr_idx_elem *cur_hdr;
|
|
int val;
|
|
|
|
cur_hdr = &txn->hdr_idx.v[cur_idx];
|
|
cur_ptr = cur_next;
|
|
cur_end = cur_ptr + cur_hdr->len;
|
|
cur_next = cur_end + cur_hdr->cr + 1;
|
|
|
|
/* We have one full header between cur_ptr and cur_end, and the
|
|
* next header starts at cur_next. We're only interested in
|
|
* "Cookie:" headers.
|
|
*/
|
|
|
|
val = http_header_match2(cur_ptr, cur_end, "Set-Cookie", 10);
|
|
if (!val) {
|
|
old_idx = cur_idx;
|
|
continue;
|
|
}
|
|
|
|
/* OK, right now we know we have a set-cookie at cur_ptr */
|
|
txn->flags |= TX_SCK_ANY;
|
|
|
|
|
|
/* maybe we only wanted to see if there was a set-cookie. Note that
|
|
* the cookie capture is declared in the fronend.
|
|
*/
|
|
if (t->be->cookie_name == NULL &&
|
|
t->be->appsession_name == NULL &&
|
|
t->fe->capture_name == NULL)
|
|
return;
|
|
|
|
p1 = cur_ptr + val; /* first non-space char after 'Set-Cookie:' */
|
|
|
|
while (p1 < cur_end) { /* in fact, we'll break after the first cookie */
|
|
if (p1 == cur_end || *p1 == ';') /* end of cookie */
|
|
break;
|
|
|
|
/* p1 is at the beginning of the cookie name */
|
|
p2 = p1;
|
|
|
|
while (p2 < cur_end && *p2 != '=' && *p2 != ';')
|
|
p2++;
|
|
|
|
if (p2 == cur_end || *p2 == ';') /* next cookie */
|
|
break;
|
|
|
|
p3 = p2 + 1; /* skip the '=' sign */
|
|
if (p3 == cur_end)
|
|
break;
|
|
|
|
p4 = p3;
|
|
while (p4 < cur_end && !isspace((unsigned char)*p4) && *p4 != ';')
|
|
p4++;
|
|
|
|
/* here, we have the cookie name between p1 and p2,
|
|
* and its value between p3 and p4.
|
|
* we can process it.
|
|
*/
|
|
|
|
/* first, let's see if we want to capture it */
|
|
if (t->fe->capture_name != NULL &&
|
|
txn->srv_cookie == NULL &&
|
|
(p4 - p1 >= t->fe->capture_namelen) &&
|
|
memcmp(p1, t->fe->capture_name, t->fe->capture_namelen) == 0) {
|
|
int log_len = p4 - p1;
|
|
|
|
if ((txn->srv_cookie = pool_alloc2(pool2_capture)) == NULL) {
|
|
Alert("HTTP logging : out of memory.\n");
|
|
}
|
|
|
|
if (log_len > t->fe->capture_len)
|
|
log_len = t->fe->capture_len;
|
|
memcpy(txn->srv_cookie, p1, log_len);
|
|
txn->srv_cookie[log_len] = 0;
|
|
}
|
|
|
|
/* now check if we need to process it for persistence */
|
|
if ((p2 - p1 == t->be->cookie_len) && (t->be->cookie_name != NULL) &&
|
|
(memcmp(p1, t->be->cookie_name, p2 - p1) == 0)) {
|
|
/* Cool... it's the right one */
|
|
txn->flags |= TX_SCK_SEEN;
|
|
|
|
/* If the cookie is in insert mode on a known server, we'll delete
|
|
* this occurrence because we'll insert another one later.
|
|
* We'll delete it too if the "indirect" option is set and we're in
|
|
* a direct access. */
|
|
if (((t->srv) && (t->be->options & PR_O_COOK_INS)) ||
|
|
((t->flags & SN_DIRECT) && (t->be->options & PR_O_COOK_IND))) {
|
|
/* this header must be deleted */
|
|
delta = buffer_replace2(rtr, cur_ptr, cur_next, NULL, 0);
|
|
txn->hdr_idx.v[old_idx].next = cur_hdr->next;
|
|
txn->hdr_idx.used--;
|
|
cur_hdr->len = 0;
|
|
cur_next += delta;
|
|
txn->rsp.eoh += delta;
|
|
|
|
txn->flags |= TX_SCK_DELETED;
|
|
}
|
|
else if ((t->srv) && (t->srv->cookie) &&
|
|
(t->be->options & PR_O_COOK_RW)) {
|
|
/* replace bytes p3->p4 with the cookie name associated
|
|
* with this server since we know it.
|
|
*/
|
|
delta = buffer_replace2(rtr, p3, p4, t->srv->cookie, t->srv->cklen);
|
|
cur_hdr->len += delta;
|
|
cur_next += delta;
|
|
txn->rsp.eoh += delta;
|
|
|
|
txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
|
|
}
|
|
else if ((t->srv) && (t->srv->cookie) &&
|
|
(t->be->options & PR_O_COOK_PFX)) {
|
|
/* insert the cookie name associated with this server
|
|
* before existing cookie, and insert a delimitor between them..
|
|
*/
|
|
delta = buffer_replace2(rtr, p3, p3, t->srv->cookie, t->srv->cklen + 1);
|
|
cur_hdr->len += delta;
|
|
cur_next += delta;
|
|
txn->rsp.eoh += delta;
|
|
|
|
p3[t->srv->cklen] = COOKIE_DELIM;
|
|
txn->flags |= TX_SCK_INSERTED | TX_SCK_DELETED;
|
|
}
|
|
}
|
|
/* next, let's see if the cookie is our appcookie */
|
|
else if ((t->be->appsession_name != NULL) &&
|
|
(memcmp(p1, t->be->appsession_name, p2 - p1) == 0)) {
|
|
|
|
/* Cool... it's the right one */
|
|
|
|
if (t->sessid != NULL) {
|
|
/* free previously allocated memory as we don't need it anymore */
|
|
pool_free2(apools.sessid, t->sessid);
|
|
}
|
|
/* Store the sessid in the session for future use */
|
|
if ((t->sessid = pool_alloc2(apools.sessid)) == NULL) {
|
|
Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
|
|
send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
|
|
return;
|
|
}
|
|
memcpy(t->sessid, p3, t->be->appsession_len);
|
|
t->sessid[t->be->appsession_len] = 0;
|
|
}/* end if ((t->proxy->appsession_name != NULL) ... */
|
|
break; /* we don't want to loop again since there cannot be another cookie on the same line */
|
|
} /* we're now at the end of the cookie value */
|
|
/* keep the link from this header to next one */
|
|
old_idx = cur_idx;
|
|
} /* end of cookie processing on this header */
|
|
|
|
if (t->sessid != NULL) {
|
|
appsess *asession = NULL;
|
|
/* only do insert, if lookup fails */
|
|
asession = appsession_hash_lookup(&(t->be->htbl_proxy), t->sessid);
|
|
if (asession == NULL) {
|
|
if ((asession = pool_alloc2(pool2_appsess)) == NULL) {
|
|
Alert("Not enough Memory process_srv():asession:calloc().\n");
|
|
send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession:calloc().\n");
|
|
return;
|
|
}
|
|
if ((asession->sessid = pool_alloc2(apools.sessid)) == NULL) {
|
|
Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
|
|
send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
|
|
return;
|
|
}
|
|
memcpy(asession->sessid, t->sessid, t->be->appsession_len);
|
|
asession->sessid[t->be->appsession_len] = 0;
|
|
|
|
size_t server_id_len = strlen(t->srv->id) + 1;
|
|
if ((asession->serverid = pool_alloc2(apools.serverid)) == NULL) {
|
|
Alert("Not enough Memory process_srv():asession->sessid:malloc().\n");
|
|
send_log(t->be, LOG_ALERT, "Not enough Memory process_srv():asession->sessid:malloc().\n");
|
|
return;
|
|
}
|
|
asession->serverid[0] = '\0';
|
|
memcpy(asession->serverid, t->srv->id, server_id_len);
|
|
|
|
asession->request_count = 0;
|
|
appsession_hash_insert(&(t->be->htbl_proxy), asession);
|
|
}
|
|
|
|
asession->expire = tick_add_ifset(now_ms, t->be->timeout.appsession);
|
|
asession->request_count++;
|
|
}
|
|
|
|
#if defined(DEBUG_HASH)
|
|
Alert("manage_server_side_cookies\n");
|
|
appsession_hash_dump(&(t->be->htbl_proxy));
|
|
#endif
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Check if response is cacheable or not. Updates t->flags.
|
|
*/
|
|
void check_response_for_cacheability(struct session *t, struct buffer *rtr)
|
|
{
|
|
struct http_txn *txn = &t->txn;
|
|
char *p1, *p2;
|
|
|
|
char *cur_ptr, *cur_end, *cur_next;
|
|
int cur_idx;
|
|
|
|
if (!(txn->flags & TX_CACHEABLE))
|
|
return;
|
|
|
|
/* Iterate through the headers.
|
|
* we start with the start line.
|
|
*/
|
|
cur_idx = 0;
|
|
cur_next = rtr->data + txn->rsp.som + hdr_idx_first_pos(&txn->hdr_idx);
|
|
|
|
while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
|
|
struct hdr_idx_elem *cur_hdr;
|
|
int val;
|
|
|
|
cur_hdr = &txn->hdr_idx.v[cur_idx];
|
|
cur_ptr = cur_next;
|
|
cur_end = cur_ptr + cur_hdr->len;
|
|
cur_next = cur_end + cur_hdr->cr + 1;
|
|
|
|
/* We have one full header between cur_ptr and cur_end, and the
|
|
* next header starts at cur_next. We're only interested in
|
|
* "Cookie:" headers.
|
|
*/
|
|
|
|
val = http_header_match2(cur_ptr, cur_end, "Pragma", 6);
|
|
if (val) {
|
|
if ((cur_end - (cur_ptr + val) >= 8) &&
|
|
strncasecmp(cur_ptr + val, "no-cache", 8) == 0) {
|
|
txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
|
|
return;
|
|
}
|
|
}
|
|
|
|
val = http_header_match2(cur_ptr, cur_end, "Cache-control", 13);
|
|
if (!val)
|
|
continue;
|
|
|
|
/* OK, right now we know we have a cache-control header at cur_ptr */
|
|
|
|
p1 = cur_ptr + val; /* first non-space char after 'cache-control:' */
|
|
|
|
if (p1 >= cur_end) /* no more info */
|
|
continue;
|
|
|
|
/* p1 is at the beginning of the value */
|
|
p2 = p1;
|
|
|
|
while (p2 < cur_end && *p2 != '=' && *p2 != ',' && !isspace((unsigned char)*p2))
|
|
p2++;
|
|
|
|
/* we have a complete value between p1 and p2 */
|
|
if (p2 < cur_end && *p2 == '=') {
|
|
/* we have something of the form no-cache="set-cookie" */
|
|
if ((cur_end - p1 >= 21) &&
|
|
strncasecmp(p1, "no-cache=\"set-cookie", 20) == 0
|
|
&& (p1[20] == '"' || p1[20] == ','))
|
|
txn->flags &= ~TX_CACHE_COOK;
|
|
continue;
|
|
}
|
|
|
|
/* OK, so we know that either p2 points to the end of string or to a comma */
|
|
if (((p2 - p1 == 7) && strncasecmp(p1, "private", 7) == 0) ||
|
|
((p2 - p1 == 8) && strncasecmp(p1, "no-store", 8) == 0) ||
|
|
((p2 - p1 == 9) && strncasecmp(p1, "max-age=0", 9) == 0) ||
|
|
((p2 - p1 == 10) && strncasecmp(p1, "s-maxage=0", 10) == 0)) {
|
|
txn->flags &= ~TX_CACHEABLE & ~TX_CACHE_COOK;
|
|
return;
|
|
}
|
|
|
|
if ((p2 - p1 == 6) && strncasecmp(p1, "public", 6) == 0) {
|
|
txn->flags |= TX_CACHEABLE | TX_CACHE_COOK;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Try to retrieve a known appsession in the URI, then the associated server.
|
|
* If the server is found, it's assigned to the session.
|
|
*/
|
|
void get_srv_from_appsession(struct session *t, const char *begin, int len)
|
|
{
|
|
char *request_line;
|
|
|
|
if (t->be->appsession_name == NULL ||
|
|
(t->txn.meth != HTTP_METH_GET && t->txn.meth != HTTP_METH_POST) ||
|
|
(request_line = memchr(begin, ';', len)) == NULL ||
|
|
((1 + t->be->appsession_name_len + 1 + t->be->appsession_len) > (begin + len - request_line)))
|
|
return;
|
|
|
|
/* skip ';' */
|
|
request_line++;
|
|
|
|
/* look if we have a jsessionid */
|
|
if (strncasecmp(request_line, t->be->appsession_name, t->be->appsession_name_len) != 0)
|
|
return;
|
|
|
|
/* skip jsessionid= */
|
|
request_line += t->be->appsession_name_len + 1;
|
|
|
|
manage_client_side_appsession(t, request_line);
|
|
#if defined(DEBUG_HASH)
|
|
Alert("get_srv_from_appsession\n");
|
|
appsession_hash_dump(&(t->be->htbl_proxy));
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* In a GET or HEAD request, check if the requested URI matches the stats uri
|
|
* for the current backend, and if an authorization has been passed and is valid.
|
|
*
|
|
* It is assumed that the request is either a HEAD or GET and that the
|
|
* t->be->uri_auth field is valid. An HTTP/401 response may be sent, or
|
|
* the stats I/O handler will be registered to start sending data.
|
|
*
|
|
* Returns 1 if the session's state changes, otherwise 0.
|
|
*/
|
|
int stats_check_uri_auth(struct session *t, struct proxy *backend)
|
|
{
|
|
struct http_txn *txn = &t->txn;
|
|
struct uri_auth *uri_auth = backend->uri_auth;
|
|
struct user_auth *user;
|
|
int authenticated, cur_idx;
|
|
char *h;
|
|
|
|
memset(&t->data_ctx.stats, 0, sizeof(t->data_ctx.stats));
|
|
|
|
/* check URI size */
|
|
if (uri_auth->uri_len > txn->req.sl.rq.u_l)
|
|
return 0;
|
|
|
|
h = t->req->data + txn->req.sl.rq.u;
|
|
|
|
/* the URI is in h */
|
|
if (memcmp(h, uri_auth->uri_prefix, uri_auth->uri_len) != 0)
|
|
return 0;
|
|
|
|
h += uri_auth->uri_len;
|
|
while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 3) {
|
|
if (memcmp(h, ";up", 3) == 0) {
|
|
t->data_ctx.stats.flags |= STAT_HIDE_DOWN;
|
|
break;
|
|
}
|
|
h++;
|
|
}
|
|
|
|
if (uri_auth->refresh) {
|
|
h = t->req->data + txn->req.sl.rq.u + uri_auth->uri_len;
|
|
while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 10) {
|
|
if (memcmp(h, ";norefresh", 10) == 0) {
|
|
t->data_ctx.stats.flags |= STAT_NO_REFRESH;
|
|
break;
|
|
}
|
|
h++;
|
|
}
|
|
}
|
|
|
|
h = t->req->data + txn->req.sl.rq.u + uri_auth->uri_len;
|
|
while (h <= t->req->data + txn->req.sl.rq.u + txn->req.sl.rq.u_l - 4) {
|
|
if (memcmp(h, ";csv", 4) == 0) {
|
|
t->data_ctx.stats.flags |= STAT_FMT_CSV;
|
|
break;
|
|
}
|
|
h++;
|
|
}
|
|
|
|
t->data_ctx.stats.flags |= STAT_SHOW_STAT | STAT_SHOW_INFO;
|
|
|
|
/* we are in front of a interceptable URI. Let's check
|
|
* if there's an authentication and if it's valid.
|
|
*/
|
|
user = uri_auth->users;
|
|
if (!user) {
|
|
/* no user auth required, it's OK */
|
|
authenticated = 1;
|
|
} else {
|
|
authenticated = 0;
|
|
|
|
/* a user list is defined, we have to check.
|
|
* skip 21 chars for "Authorization: Basic ".
|
|
*/
|
|
|
|
/* FIXME: this should move to an earlier place */
|
|
cur_idx = 0;
|
|
h = t->req->data + txn->req.som + hdr_idx_first_pos(&txn->hdr_idx);
|
|
while ((cur_idx = txn->hdr_idx.v[cur_idx].next)) {
|
|
int len = txn->hdr_idx.v[cur_idx].len;
|
|
if (len > 14 &&
|
|
!strncasecmp("Authorization:", h, 14)) {
|
|
chunk_initlen(&txn->auth_hdr, h, 0, len);
|
|
break;
|
|
}
|
|
h += len + txn->hdr_idx.v[cur_idx].cr + 1;
|
|
}
|
|
|
|
if (txn->auth_hdr.len < 21 ||
|
|
memcmp(txn->auth_hdr.str + 14, " Basic ", 7))
|
|
user = NULL;
|
|
|
|
while (user) {
|
|
if ((txn->auth_hdr.len == user->user_len + 14 + 7)
|
|
&& !memcmp(txn->auth_hdr.str + 14 + 7,
|
|
user->user_pwd, user->user_len)) {
|
|
authenticated = 1;
|
|
break;
|
|
}
|
|
user = user->next;
|
|
}
|
|
}
|
|
|
|
if (!authenticated) {
|
|
struct chunk msg;
|
|
|
|
/* no need to go further */
|
|
sprintf(trash, HTTP_401_fmt, uri_auth->auth_realm);
|
|
chunk_initlen(&msg, trash, sizeof(trash), strlen(trash));
|
|
txn->status = 401;
|
|
stream_int_retnclose(t->req->prod, &msg);
|
|
t->req->analysers = 0;
|
|
if (!(t->flags & SN_ERR_MASK))
|
|
t->flags |= SN_ERR_PRXCOND;
|
|
if (!(t->flags & SN_FINST_MASK))
|
|
t->flags |= SN_FINST_R;
|
|
return 1;
|
|
}
|
|
|
|
/* The request is valid, the user is authenticated. Let's start sending
|
|
* data.
|
|
*/
|
|
t->logs.tv_request = now;
|
|
t->data_source = DATA_SRC_STATS;
|
|
t->data_state = DATA_ST_INIT;
|
|
t->task->nice = -32; /* small boost for HTTP statistics */
|
|
stream_int_register_handler(t->rep->prod, http_stats_io_handler);
|
|
t->rep->prod->private = t;
|
|
t->rep->prod->st0 = t->rep->prod->st1 = 0;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Capture a bad request or response and archive it in the proxy's structure.
|
|
*/
|
|
void http_capture_bad_message(struct error_snapshot *es, struct session *s,
|
|
struct buffer *buf, struct http_msg *msg,
|
|
struct proxy *other_end)
|
|
{
|
|
es->len = buf->r - (buf->data + msg->som);
|
|
memcpy(es->buf, buf->data + msg->som, MIN(es->len, sizeof(es->buf)));
|
|
if (msg->err_pos >= 0)
|
|
es->pos = msg->err_pos - msg->som;
|
|
else
|
|
es->pos = buf->lr - (buf->data + msg->som);
|
|
es->when = date; // user-visible date
|
|
es->sid = s->uniq_id;
|
|
es->srv = s->srv;
|
|
es->oe = other_end;
|
|
es->src = s->cli_addr;
|
|
}
|
|
|
|
/*
|
|
* Print a debug line with a header
|
|
*/
|
|
void debug_hdr(const char *dir, struct session *t, const char *start, const char *end)
|
|
{
|
|
int len, max;
|
|
len = sprintf(trash, "%08x:%s.%s[%04x:%04x]: ", t->uniq_id, t->be->id,
|
|
dir, (unsigned short)t->req->prod->fd, (unsigned short)t->req->cons->fd);
|
|
max = end - start;
|
|
UBOUND(max, sizeof(trash) - len - 1);
|
|
len += strlcpy2(trash + len, start, max + 1);
|
|
trash[len++] = '\n';
|
|
write(1, trash, len);
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* The code below is dedicated to ACL parsing and matching */
|
|
/************************************************************************/
|
|
|
|
|
|
|
|
|
|
/* 1. Check on METHOD
|
|
* We use the pre-parsed method if it is known, and store its number as an
|
|
* integer. If it is unknown, we use the pointer and the length.
|
|
*/
|
|
static int acl_parse_meth(const char **text, struct acl_pattern *pattern, int *opaque)
|
|
{
|
|
int len, meth;
|
|
|
|
len = strlen(*text);
|
|
meth = find_http_meth(*text, len);
|
|
|
|
pattern->val.i = meth;
|
|
if (meth == HTTP_METH_OTHER) {
|
|
pattern->ptr.str = strdup(*text);
|
|
if (!pattern->ptr.str)
|
|
return 0;
|
|
pattern->len = len;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_meth(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
int meth;
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
meth = txn->meth;
|
|
test->i = meth;
|
|
if (meth == HTTP_METH_OTHER) {
|
|
if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
|
|
/* ensure the indexes are not affected */
|
|
return 0;
|
|
test->len = txn->req.sl.rq.m_l;
|
|
test->ptr = txn->req.sol;
|
|
}
|
|
test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
|
|
return 1;
|
|
}
|
|
|
|
static int acl_match_meth(struct acl_test *test, struct acl_pattern *pattern)
|
|
{
|
|
int icase;
|
|
|
|
if (test->i != pattern->val.i)
|
|
return ACL_PAT_FAIL;
|
|
|
|
if (test->i != HTTP_METH_OTHER)
|
|
return ACL_PAT_PASS;
|
|
|
|
/* Other method, we must compare the strings */
|
|
if (pattern->len != test->len)
|
|
return ACL_PAT_FAIL;
|
|
|
|
icase = pattern->flags & ACL_PAT_F_IGNORE_CASE;
|
|
if ((icase && strncasecmp(pattern->ptr.str, test->ptr, test->len) != 0) ||
|
|
(!icase && strncmp(pattern->ptr.str, test->ptr, test->len) != 0))
|
|
return ACL_PAT_FAIL;
|
|
return ACL_PAT_PASS;
|
|
}
|
|
|
|
/* 2. Check on Request/Status Version
|
|
* We simply compare strings here.
|
|
*/
|
|
static int acl_parse_ver(const char **text, struct acl_pattern *pattern, int *opaque)
|
|
{
|
|
pattern->ptr.str = strdup(*text);
|
|
if (!pattern->ptr.str)
|
|
return 0;
|
|
pattern->len = strlen(*text);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_rqver(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
char *ptr;
|
|
int len;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
len = txn->req.sl.rq.v_l;
|
|
ptr = txn->req.sol + txn->req.sl.rq.v - txn->req.som;
|
|
|
|
while ((len-- > 0) && (*ptr++ != '/'));
|
|
if (len <= 0)
|
|
return 0;
|
|
|
|
test->ptr = ptr;
|
|
test->len = len;
|
|
|
|
test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_stver(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
char *ptr;
|
|
int len;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
len = txn->rsp.sl.st.v_l;
|
|
ptr = txn->rsp.sol;
|
|
|
|
while ((len-- > 0) && (*ptr++ != '/'));
|
|
if (len <= 0)
|
|
return 0;
|
|
|
|
test->ptr = ptr;
|
|
test->len = len;
|
|
|
|
test->flags = ACL_TEST_F_READ_ONLY | ACL_TEST_F_VOL_1ST;
|
|
return 1;
|
|
}
|
|
|
|
/* 3. Check on Status Code. We manipulate integers here. */
|
|
static int
|
|
acl_fetch_stcode(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
char *ptr;
|
|
int len;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
len = txn->rsp.sl.st.c_l;
|
|
ptr = txn->rsp.sol + txn->rsp.sl.st.c - txn->rsp.som;
|
|
|
|
test->i = __strl2ui(ptr, len);
|
|
test->flags = ACL_TEST_F_VOL_1ST;
|
|
return 1;
|
|
}
|
|
|
|
/* 4. Check on URL/URI. A pointer to the URI is stored. */
|
|
static int
|
|
acl_fetch_url(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
|
|
/* ensure the indexes are not affected */
|
|
return 0;
|
|
|
|
test->len = txn->req.sl.rq.u_l;
|
|
test->ptr = txn->req.sol + txn->req.sl.rq.u;
|
|
|
|
/* we do not need to set READ_ONLY because the data is in a buffer */
|
|
test->flags = ACL_TEST_F_VOL_1ST;
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_url_ip(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
|
|
/* ensure the indexes are not affected */
|
|
return 0;
|
|
|
|
/* Parse HTTP request */
|
|
url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
|
|
test->ptr = (void *)&((struct sockaddr_in *)&l4->srv_addr)->sin_addr;
|
|
test->i = AF_INET;
|
|
|
|
/*
|
|
* If we are parsing url in frontend space, we prepare backend stage
|
|
* to not parse again the same url ! optimization lazyness...
|
|
*/
|
|
if (px->options & PR_O_HTTP_PROXY)
|
|
l4->flags |= SN_ADDR_SET;
|
|
|
|
test->flags = ACL_TEST_F_READ_ONLY;
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_url_port(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
|
|
/* ensure the indexes are not affected */
|
|
return 0;
|
|
|
|
/* Same optimization as url_ip */
|
|
url2sa(txn->req.sol + txn->req.sl.rq.u, txn->req.sl.rq.u_l, &l4->srv_addr);
|
|
test->i = ntohs(((struct sockaddr_in *)&l4->srv_addr)->sin_port);
|
|
|
|
if (px->options & PR_O_HTTP_PROXY)
|
|
l4->flags |= SN_ADDR_SET;
|
|
|
|
test->flags = ACL_TEST_F_READ_ONLY;
|
|
return 1;
|
|
}
|
|
|
|
/* 5. Check on HTTP header. A pointer to the beginning of the value is returned.
|
|
* This generic function is used by both acl_fetch_chdr() and acl_fetch_shdr().
|
|
*/
|
|
static int
|
|
acl_fetch_hdr(struct proxy *px, struct session *l4, void *l7, char *sol,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
struct hdr_idx *idx = &txn->hdr_idx;
|
|
struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (!(test->flags & ACL_TEST_F_FETCH_MORE))
|
|
/* search for header from the beginning */
|
|
ctx->idx = 0;
|
|
|
|
if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
|
|
test->flags |= ACL_TEST_F_FETCH_MORE;
|
|
test->flags |= ACL_TEST_F_VOL_HDR;
|
|
test->len = ctx->vlen;
|
|
test->ptr = (char *)ctx->line + ctx->val;
|
|
return 1;
|
|
}
|
|
|
|
test->flags &= ~ACL_TEST_F_FETCH_MORE;
|
|
test->flags |= ACL_TEST_F_VOL_HDR;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_chdr(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
|
|
/* ensure the indexes are not affected */
|
|
return 0;
|
|
|
|
return acl_fetch_hdr(px, l4, txn, txn->req.sol, expr, test);
|
|
}
|
|
|
|
static int
|
|
acl_fetch_shdr(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
return acl_fetch_hdr(px, l4, txn, txn->rsp.sol, expr, test);
|
|
}
|
|
|
|
/* 6. Check on HTTP header count. The number of occurrences is returned.
|
|
* This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
|
|
*/
|
|
static int
|
|
acl_fetch_hdr_cnt(struct proxy *px, struct session *l4, void *l7, char *sol,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
struct hdr_idx *idx = &txn->hdr_idx;
|
|
struct hdr_ctx ctx;
|
|
int cnt;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
ctx.idx = 0;
|
|
cnt = 0;
|
|
while (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, &ctx))
|
|
cnt++;
|
|
|
|
test->i = cnt;
|
|
test->flags = ACL_TEST_F_VOL_HDR;
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_chdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
|
|
/* ensure the indexes are not affected */
|
|
return 0;
|
|
|
|
return acl_fetch_hdr_cnt(px, l4, txn, txn->req.sol, expr, test);
|
|
}
|
|
|
|
static int
|
|
acl_fetch_shdr_cnt(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
return acl_fetch_hdr_cnt(px, l4, txn, txn->rsp.sol, expr, test);
|
|
}
|
|
|
|
/* 7. Check on HTTP header's integer value. The integer value is returned.
|
|
* FIXME: the type is 'int', it may not be appropriate for everything.
|
|
* This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
|
|
*/
|
|
static int
|
|
acl_fetch_hdr_val(struct proxy *px, struct session *l4, void *l7, char *sol,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
struct hdr_idx *idx = &txn->hdr_idx;
|
|
struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (!(test->flags & ACL_TEST_F_FETCH_MORE))
|
|
/* search for header from the beginning */
|
|
ctx->idx = 0;
|
|
|
|
if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
|
|
test->flags |= ACL_TEST_F_FETCH_MORE;
|
|
test->flags |= ACL_TEST_F_VOL_HDR;
|
|
test->i = strl2ic((char *)ctx->line + ctx->val, ctx->vlen);
|
|
return 1;
|
|
}
|
|
|
|
test->flags &= ~ACL_TEST_F_FETCH_MORE;
|
|
test->flags |= ACL_TEST_F_VOL_HDR;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_chdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
|
|
/* ensure the indexes are not affected */
|
|
return 0;
|
|
|
|
return acl_fetch_hdr_val(px, l4, txn, txn->req.sol, expr, test);
|
|
}
|
|
|
|
static int
|
|
acl_fetch_shdr_val(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
return acl_fetch_hdr_val(px, l4, txn, txn->rsp.sol, expr, test);
|
|
}
|
|
|
|
/* 7. Check on HTTP header's IPv4 address value. The IPv4 address is returned.
|
|
* This generic function is used by both acl_fetch_chdr* and acl_fetch_shdr*.
|
|
*/
|
|
static int
|
|
acl_fetch_hdr_ip(struct proxy *px, struct session *l4, void *l7, char *sol,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
struct hdr_idx *idx = &txn->hdr_idx;
|
|
struct hdr_ctx *ctx = (struct hdr_ctx *)test->ctx.a;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (!(test->flags & ACL_TEST_F_FETCH_MORE))
|
|
/* search for header from the beginning */
|
|
ctx->idx = 0;
|
|
|
|
if (http_find_header2(expr->arg.str, expr->arg_len, sol, idx, ctx)) {
|
|
test->flags |= ACL_TEST_F_FETCH_MORE;
|
|
test->flags |= ACL_TEST_F_VOL_HDR;
|
|
/* Same optimization as url_ip */
|
|
memset(&l4->srv_addr.sin_addr, 0, sizeof(l4->srv_addr.sin_addr));
|
|
url2ip((char *)ctx->line + ctx->val, &l4->srv_addr.sin_addr);
|
|
test->ptr = (void *)&l4->srv_addr.sin_addr;
|
|
test->i = AF_INET;
|
|
return 1;
|
|
}
|
|
|
|
test->flags &= ~ACL_TEST_F_FETCH_MORE;
|
|
test->flags |= ACL_TEST_F_VOL_HDR;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_chdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
|
|
/* ensure the indexes are not affected */
|
|
return 0;
|
|
|
|
return acl_fetch_hdr_ip(px, l4, txn, txn->req.sol, expr, test);
|
|
}
|
|
|
|
static int
|
|
acl_fetch_shdr_ip(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
return acl_fetch_hdr_ip(px, l4, txn, txn->rsp.sol, expr, test);
|
|
}
|
|
|
|
/* 8. Check on URI PATH. A pointer to the PATH is stored. The path starts at
|
|
* the first '/' after the possible hostname, and ends before the possible '?'.
|
|
*/
|
|
static int
|
|
acl_fetch_path(struct proxy *px, struct session *l4, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct http_txn *txn = l7;
|
|
char *ptr, *end;
|
|
|
|
if (!txn)
|
|
return 0;
|
|
|
|
if (txn->req.msg_state != HTTP_MSG_BODY)
|
|
return 0;
|
|
|
|
if (txn->rsp.msg_state != HTTP_MSG_RPBEFORE)
|
|
/* ensure the indexes are not affected */
|
|
return 0;
|
|
|
|
end = txn->req.sol + txn->req.sl.rq.u + txn->req.sl.rq.u_l;
|
|
ptr = http_get_path(txn);
|
|
if (!ptr)
|
|
return 0;
|
|
|
|
/* OK, we got the '/' ! */
|
|
test->ptr = ptr;
|
|
|
|
while (ptr < end && *ptr != '?')
|
|
ptr++;
|
|
|
|
test->len = ptr - test->ptr;
|
|
|
|
/* we do not need to set READ_ONLY because the data is in a buffer */
|
|
test->flags = ACL_TEST_F_VOL_1ST;
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
acl_fetch_proto_http(struct proxy *px, struct session *s, void *l7, int dir,
|
|
struct acl_expr *expr, struct acl_test *test)
|
|
{
|
|
struct buffer *req = s->req;
|
|
struct http_txn *txn = &s->txn;
|
|
struct http_msg *msg = &txn->req;
|
|
|
|
/* Note: hdr_idx.v cannot be NULL in this ACL because the ACL is tagged
|
|
* as a layer7 ACL, which involves automatic allocation of hdr_idx.
|
|
*/
|
|
|
|
if (!s || !req)
|
|
return 0;
|
|
|
|
if (unlikely(msg->msg_state == HTTP_MSG_BODY)) {
|
|
/* Already decoded as OK */
|
|
test->flags |= ACL_TEST_F_SET_RES_PASS;
|
|
return 1;
|
|
}
|
|
|
|
/* Try to decode HTTP request */
|
|
if (likely(req->lr < req->r))
|
|
http_msg_analyzer(req, msg, &txn->hdr_idx);
|
|
|
|
if (unlikely(msg->msg_state != HTTP_MSG_BODY)) {
|
|
if ((msg->msg_state == HTTP_MSG_ERROR) || (req->flags & BF_FULL)) {
|
|
test->flags |= ACL_TEST_F_SET_RES_FAIL;
|
|
return 1;
|
|
}
|
|
/* wait for final state */
|
|
test->flags |= ACL_TEST_F_MAY_CHANGE;
|
|
return 0;
|
|
}
|
|
|
|
/* OK we got a valid HTTP request. We have some minor preparation to
|
|
* perform so that further checks can rely on HTTP tests.
|
|
*/
|
|
msg->sol = req->data + msg->som;
|
|
txn->meth = find_http_meth(&req->data[msg->som], msg->sl.rq.m_l);
|
|
if (txn->meth == HTTP_METH_GET || txn->meth == HTTP_METH_HEAD)
|
|
s->flags |= SN_REDIRECTABLE;
|
|
|
|
if (unlikely(msg->sl.rq.v_l == 0) && !http_upgrade_v09_to_v10(req, msg, txn)) {
|
|
test->flags |= ACL_TEST_F_SET_RES_FAIL;
|
|
return 1;
|
|
}
|
|
|
|
test->flags |= ACL_TEST_F_SET_RES_PASS;
|
|
return 1;
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* All supported keywords must be declared here. */
|
|
/************************************************************************/
|
|
|
|
/* Note: must not be declared <const> as its list will be overwritten */
|
|
static struct acl_kw_list acl_kws = {{ },{
|
|
{ "req_proto_http", acl_parse_nothing, acl_fetch_proto_http, acl_match_nothing, ACL_USE_L7REQ_PERMANENT },
|
|
|
|
{ "method", acl_parse_meth, acl_fetch_meth, acl_match_meth, ACL_USE_L7REQ_PERMANENT },
|
|
{ "req_ver", acl_parse_ver, acl_fetch_rqver, acl_match_str, ACL_USE_L7REQ_VOLATILE },
|
|
{ "resp_ver", acl_parse_ver, acl_fetch_stver, acl_match_str, ACL_USE_L7RTR_VOLATILE },
|
|
{ "status", acl_parse_int, acl_fetch_stcode, acl_match_int, ACL_USE_L7RTR_PERMANENT },
|
|
|
|
{ "url", acl_parse_str, acl_fetch_url, acl_match_str, ACL_USE_L7REQ_VOLATILE },
|
|
{ "url_beg", acl_parse_str, acl_fetch_url, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
|
|
{ "url_end", acl_parse_str, acl_fetch_url, acl_match_end, ACL_USE_L7REQ_VOLATILE },
|
|
{ "url_sub", acl_parse_str, acl_fetch_url, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
|
|
{ "url_dir", acl_parse_str, acl_fetch_url, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
|
|
{ "url_dom", acl_parse_str, acl_fetch_url, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
|
|
{ "url_reg", acl_parse_reg, acl_fetch_url, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
|
|
{ "url_ip", acl_parse_ip, acl_fetch_url_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE },
|
|
{ "url_port", acl_parse_int, acl_fetch_url_port, acl_match_int, ACL_USE_L7REQ_VOLATILE },
|
|
|
|
/* note: we should set hdr* to use ACL_USE_HDR_VOLATILE, and chdr* to use L7REQ_VOLATILE */
|
|
{ "hdr", acl_parse_str, acl_fetch_chdr, acl_match_str, ACL_USE_L7REQ_VOLATILE },
|
|
{ "hdr_reg", acl_parse_reg, acl_fetch_chdr, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
|
|
{ "hdr_beg", acl_parse_str, acl_fetch_chdr, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
|
|
{ "hdr_end", acl_parse_str, acl_fetch_chdr, acl_match_end, ACL_USE_L7REQ_VOLATILE },
|
|
{ "hdr_sub", acl_parse_str, acl_fetch_chdr, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
|
|
{ "hdr_dir", acl_parse_str, acl_fetch_chdr, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
|
|
{ "hdr_dom", acl_parse_str, acl_fetch_chdr, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
|
|
{ "hdr_cnt", acl_parse_int, acl_fetch_chdr_cnt,acl_match_int, ACL_USE_L7REQ_VOLATILE },
|
|
{ "hdr_val", acl_parse_int, acl_fetch_chdr_val,acl_match_int, ACL_USE_L7REQ_VOLATILE },
|
|
{ "hdr_ip", acl_parse_ip, acl_fetch_chdr_ip, acl_match_ip, ACL_USE_L7REQ_VOLATILE },
|
|
|
|
{ "shdr", acl_parse_str, acl_fetch_shdr, acl_match_str, ACL_USE_L7RTR_VOLATILE },
|
|
{ "shdr_reg", acl_parse_reg, acl_fetch_shdr, acl_match_reg, ACL_USE_L7RTR_VOLATILE },
|
|
{ "shdr_beg", acl_parse_str, acl_fetch_shdr, acl_match_beg, ACL_USE_L7RTR_VOLATILE },
|
|
{ "shdr_end", acl_parse_str, acl_fetch_shdr, acl_match_end, ACL_USE_L7RTR_VOLATILE },
|
|
{ "shdr_sub", acl_parse_str, acl_fetch_shdr, acl_match_sub, ACL_USE_L7RTR_VOLATILE },
|
|
{ "shdr_dir", acl_parse_str, acl_fetch_shdr, acl_match_dir, ACL_USE_L7RTR_VOLATILE },
|
|
{ "shdr_dom", acl_parse_str, acl_fetch_shdr, acl_match_dom, ACL_USE_L7RTR_VOLATILE },
|
|
{ "shdr_cnt", acl_parse_int, acl_fetch_shdr_cnt,acl_match_int, ACL_USE_L7RTR_VOLATILE },
|
|
{ "shdr_val", acl_parse_int, acl_fetch_shdr_val,acl_match_int, ACL_USE_L7RTR_VOLATILE },
|
|
{ "shdr_ip", acl_parse_ip, acl_fetch_shdr_ip, acl_match_ip, ACL_USE_L7RTR_VOLATILE },
|
|
|
|
{ "path", acl_parse_str, acl_fetch_path, acl_match_str, ACL_USE_L7REQ_VOLATILE },
|
|
{ "path_reg", acl_parse_reg, acl_fetch_path, acl_match_reg, ACL_USE_L7REQ_VOLATILE },
|
|
{ "path_beg", acl_parse_str, acl_fetch_path, acl_match_beg, ACL_USE_L7REQ_VOLATILE },
|
|
{ "path_end", acl_parse_str, acl_fetch_path, acl_match_end, ACL_USE_L7REQ_VOLATILE },
|
|
{ "path_sub", acl_parse_str, acl_fetch_path, acl_match_sub, ACL_USE_L7REQ_VOLATILE },
|
|
{ "path_dir", acl_parse_str, acl_fetch_path, acl_match_dir, ACL_USE_L7REQ_VOLATILE },
|
|
{ "path_dom", acl_parse_str, acl_fetch_path, acl_match_dom, ACL_USE_L7REQ_VOLATILE },
|
|
|
|
{ NULL, NULL, NULL, NULL },
|
|
|
|
#if 0
|
|
{ "line", acl_parse_str, acl_fetch_line, acl_match_str },
|
|
{ "line_reg", acl_parse_reg, acl_fetch_line, acl_match_reg },
|
|
{ "line_beg", acl_parse_str, acl_fetch_line, acl_match_beg },
|
|
{ "line_end", acl_parse_str, acl_fetch_line, acl_match_end },
|
|
{ "line_sub", acl_parse_str, acl_fetch_line, acl_match_sub },
|
|
{ "line_dir", acl_parse_str, acl_fetch_line, acl_match_dir },
|
|
{ "line_dom", acl_parse_str, acl_fetch_line, acl_match_dom },
|
|
|
|
{ "cook", acl_parse_str, acl_fetch_cook, acl_match_str },
|
|
{ "cook_reg", acl_parse_reg, acl_fetch_cook, acl_match_reg },
|
|
{ "cook_beg", acl_parse_str, acl_fetch_cook, acl_match_beg },
|
|
{ "cook_end", acl_parse_str, acl_fetch_cook, acl_match_end },
|
|
{ "cook_sub", acl_parse_str, acl_fetch_cook, acl_match_sub },
|
|
{ "cook_dir", acl_parse_str, acl_fetch_cook, acl_match_dir },
|
|
{ "cook_dom", acl_parse_str, acl_fetch_cook, acl_match_dom },
|
|
{ "cook_pst", acl_parse_none, acl_fetch_cook, acl_match_pst },
|
|
|
|
{ "auth_user", acl_parse_str, acl_fetch_user, acl_match_str },
|
|
{ "auth_regex", acl_parse_reg, acl_fetch_user, acl_match_reg },
|
|
{ "auth_clear", acl_parse_str, acl_fetch_auth, acl_match_str },
|
|
{ "auth_md5", acl_parse_str, acl_fetch_auth, acl_match_md5 },
|
|
{ NULL, NULL, NULL, NULL },
|
|
#endif
|
|
}};
|
|
|
|
|
|
__attribute__((constructor))
|
|
static void __http_protocol_init(void)
|
|
{
|
|
acl_register_keywords(&acl_kws);
|
|
}
|
|
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-indent-level: 8
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|