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[CLEANUP] move the session-related functions to session.c
proto_http.c was not suitable for session-related processing, it was just convenient for the tranformation. Some more splitting must occur: process_request/response in proto_http.c must be split again per protocol, and the caller must run a list. Some functions should be directly attached to the session or the buffer (eg: perform_http_redirect, return_srv_error, http_sess_log).
This commit is contained in:
parent
fe3718ab79
commit
55a8d0e1bb
@ -3,7 +3,7 @@
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This file contains HTTP protocol definitions.
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Copyright (C) 2000-2008 Willy Tarreau - w@1wt.eu
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation, version 2.1
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@ -87,6 +87,9 @@ void init_proto_http();
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int http_find_header2(const char *name, int len,
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const char *sol, struct hdr_idx *idx,
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struct hdr_ctx *ctx);
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void http_sess_log(struct session *s);
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void perform_http_redirect(struct session *s, struct stream_interface *si);
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void return_srv_error(struct session *s, int err_type);
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#endif /* _PROTO_PROTO_HTTP_H */
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@ -3,7 +3,7 @@
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This file defines the structures used by generic network protocols.
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Copyright (C) 2000-2008 Willy Tarreau - w@1wt.eu
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation, version 2.1
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@ -30,6 +30,8 @@
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#include <common/config.h>
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#include <common/mini-clist.h>
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#include <types/task.h>
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/* max length of a protcol name, including trailing zero */
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#define PROTO_NAME_LEN 16
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src/proto_http.c
859
src/proto_http.c
@ -206,11 +206,6 @@ fd_set url_encode_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set)
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#error "Check if your OS uses bitfields for fd_sets"
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#endif
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int sess_update_st_con_tcp(struct session *s, struct stream_interface *si);
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int sess_update_st_cer(struct session *s, struct stream_interface *si);
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void sess_establish(struct session *s, struct stream_interface *si);
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void return_srv_error(struct session *s, int err_type);
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void init_proto_http()
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{
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int i;
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@ -375,8 +370,6 @@ const char http_is_ver_token[256] = {
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static char *cli_stnames[4] = { "DAT", "SHR", "SHW", "CLS" };
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#endif
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static void http_sess_log(struct session *s);
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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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@ -650,166 +643,11 @@ http_get_path(struct http_txn *txn)
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return ptr;
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}
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/* Update stream interface status for input states SI_ST_ASS, SI_ST_QUE, SI_ST_TAR.
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* Other input states are simply ignored.
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* Possible output states are SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ, SI_ST_CON.
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* Flags must have previously been updated for timeouts and other conditions.
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*/
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void sess_update_stream_int(struct session *s, struct stream_interface *si)
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{
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DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d\n",
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now_ms, __FUNCTION__,
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s,
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s->req, s->rep,
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s->req->rex, s->rep->wex,
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s->req->flags, s->rep->flags,
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s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state);
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if (si->state == SI_ST_ASS) {
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/* Server assigned to connection request, we have to try to connect now */
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int conn_err;
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conn_err = connect_server(s);
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if (conn_err == SN_ERR_NONE) {
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/* state = SI_ST_CON now */
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return;
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}
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/* We have received a synchronous error. We might have to
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* abort, retry immediately or redispatch.
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*/
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if (conn_err == SN_ERR_INTERNAL) {
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if (!si->err_type) {
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si->err_type = SI_ET_CONN_OTHER;
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si->err_loc = s->srv;
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}
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if (s->srv)
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s->srv->cum_sess++;
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if (s->srv)
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s->srv->failed_conns++;
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s->be->failed_conns++;
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/* release other sessions waiting for this server */
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if (may_dequeue_tasks(s->srv, s->be))
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process_srv_queue(s->srv);
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/* Failed and not retryable. */
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si->shutr(si);
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si->shutw(si);
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si->ob->flags |= BF_WRITE_ERROR;
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s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
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/* no session was ever accounted for this server */
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si->state = SI_ST_CLO;
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return_srv_error(s, si->err_type);
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return;
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}
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/* We are facing a retryable error, but we don't want to run a
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* turn-around now, as the problem is likely a source port
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* allocation problem, so we want to retry now.
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*/
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si->state = SI_ST_CER;
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si->flags &= ~SI_FL_ERR;
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sess_update_st_cer(s, si);
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/* now si->state is one of SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ */
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return;
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}
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else if (si->state == SI_ST_QUE) {
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/* connection request was queued, check for any update */
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if (!s->pend_pos) {
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/* The connection is not in the queue anymore. Either
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* we have a server connection slot available and we
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* go directly to the assigned state, or we need to
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* load-balance first and go to the INI state.
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*/
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si->exp = TICK_ETERNITY;
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if (unlikely(!(s->flags & SN_ASSIGNED)))
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si->state = SI_ST_REQ;
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else {
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s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
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si->state = SI_ST_ASS;
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}
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return;
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}
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/* Connection request still in queue... */
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if (si->flags & SI_FL_EXP) {
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/* ... and timeout expired */
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si->exp = TICK_ETERNITY;
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s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
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if (s->srv)
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s->srv->failed_conns++;
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s->be->failed_conns++;
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si->shutr(si);
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si->shutw(si);
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si->ob->flags |= BF_WRITE_TIMEOUT;
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if (!si->err_type)
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si->err_type = SI_ET_QUEUE_TO;
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si->state = SI_ST_CLO;
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return_srv_error(s, si->err_type);
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return;
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}
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/* Connection remains in queue, check if we have to abort it */
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if ((si->ob->flags & (BF_READ_ERROR|BF_SHUTW_NOW)) || /* abort requested */
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((si->ob->flags & BF_SHUTR) && /* empty and client stopped */
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(si->ob->flags & BF_EMPTY || s->be->options & PR_O_ABRT_CLOSE))) {
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/* give up */
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si->exp = TICK_ETERNITY;
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s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
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si->shutr(si);
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si->shutw(si);
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si->err_type |= SI_ET_QUEUE_ABRT;
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si->state = SI_ST_CLO;
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return_srv_error(s, si->err_type);
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return;
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}
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/* Nothing changed */
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return;
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}
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else if (si->state == SI_ST_TAR) {
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/* Connection request might be aborted */
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if ((si->ob->flags & (BF_READ_ERROR|BF_SHUTW_NOW)) || /* abort requested */
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((si->ob->flags & BF_SHUTR) && /* empty and client stopped */
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(si->ob->flags & BF_EMPTY || s->be->options & PR_O_ABRT_CLOSE))) {
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/* give up */
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si->exp = TICK_ETERNITY;
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si->shutr(si);
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si->shutw(si);
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si->err_type |= SI_ET_CONN_ABRT;
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si->state = SI_ST_CLO;
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return_srv_error(s, si->err_type);
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return;
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}
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if (!(si->flags & SI_FL_EXP))
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return; /* still in turn-around */
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si->exp = TICK_ETERNITY;
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/* we keep trying on the same server as long as the session is
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* marked "assigned".
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* FIXME: Should we force a redispatch attempt when the server is down ?
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*/
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if (s->flags & SN_ASSIGNED)
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si->state = SI_ST_ASS;
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else
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si->state = SI_ST_REQ;
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return;
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}
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}
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/* Returns a 302 for a redirectable request. This may only be called just after
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* the stream interface has moved to SI_ST_ASS. Unprocessable requests are
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* left unchanged and will follow normal proxy processing.
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*/
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static void perform_http_redirect(struct session *s, struct stream_interface *si)
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void perform_http_redirect(struct session *s, struct stream_interface *si)
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{
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struct http_txn *txn;
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struct chunk rdr;
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@ -858,49 +696,6 @@ static void perform_http_redirect(struct session *s, struct stream_interface *si
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s->srv->cum_sess++;
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}
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/* This function initiates a server connection request on a stream interface
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* already in SI_ST_REQ state. Upon success, the state goes to SI_ST_ASS,
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* indicating that a server has been assigned. It may also return SI_ST_QUE,
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* or SI_ST_CLO upon error.
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*/
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static void sess_prepare_conn_req(struct session *s, struct stream_interface *si) {
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DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d\n",
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now_ms, __FUNCTION__,
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s,
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s->req, s->rep,
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s->req->rex, s->rep->wex,
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s->req->flags, s->rep->flags,
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s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state);
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if (si->state != SI_ST_REQ)
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return;
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/* Try to assign a server */
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if (srv_redispatch_connect(s) != 0) {
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/* We did not get a server. Either we queued the
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* connection request, or we encountered an error.
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*/
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if (si->state == SI_ST_QUE)
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return;
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/* we did not get any server, let's check the cause */
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si->shutr(si);
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si->shutw(si);
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si->ob->flags |= BF_WRITE_ERROR;
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if (!si->err_type)
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si->err_type = SI_ET_CONN_OTHER;
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si->state = SI_ST_CLO;
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return_srv_error(s, si->err_type);
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return;
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}
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/* The server is assigned */
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s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
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si->state = SI_ST_ASS;
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}
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/* Return the error message corresponding to err_type. It is assumed
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* that the server side is closed. Note that err_type is actually a
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* bitmask, where almost only aborts may be cumulated with other
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@ -937,447 +732,6 @@ void return_srv_error(struct session *s, int err_type)
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500, error_message(s, HTTP_ERR_500));
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}
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/* Processes the client, server, request and response jobs of a session task,
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* then puts it back to the wait queue in a clean state, or cleans up its
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* resources if it must be deleted. Returns in <next> the date the task wants
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* to be woken up, or TICK_ETERNITY. In order not to call all functions for
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* nothing too many times, the request and response buffers flags are monitored
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* and each function is called only if at least another function has changed at
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* least one flag it is interested in.
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*/
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void process_session(struct task *t, int *next)
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{
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struct session *s = t->context;
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int resync;
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unsigned int rqf_last, rpf_last;
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//DPRINTF(stderr, "%s:%d: cs=%d ss=%d(%d) rqf=0x%08x rpf=0x%08x\n", __FUNCTION__, __LINE__,
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// s->si[0].state, s->si[1].state, s->si[1].err_type, s->req->flags, s->rep->flags);
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/* 1a: Check for low level timeouts if needed. We just set a flag on
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* stream interfaces when their timeouts have expired.
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*/
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if (unlikely(t->state & TASK_WOKEN_TIMER)) {
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stream_int_check_timeouts(&s->si[0]);
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stream_int_check_timeouts(&s->si[1]);
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buffer_check_timeouts(s->req);
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buffer_check_timeouts(s->rep);
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}
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/* copy req/rep flags so that we can detect shutdowns */
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rqf_last = s->req->flags;
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rpf_last = s->rep->flags;
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/* 1b: check for low-level errors reported at the stream interface.
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* First we check if it's a retryable error (in which case we don't
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* want to tell the buffer). Otherwise we report the error one level
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* upper by setting flags into the buffers. Note that the side towards
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* the client cannot have connect (hence retryable) errors. Also, the
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* connection setup code must be able to deal with any type of abort.
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*/
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if (unlikely(s->si[0].flags & SI_FL_ERR)) {
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if (s->si[0].state == SI_ST_EST || s->si[0].state == SI_ST_DIS) {
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s->si[0].shutr(&s->si[0]);
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s->si[0].shutw(&s->si[0]);
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stream_int_report_error(&s->si[0]);
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}
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}
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if (unlikely(s->si[1].flags & SI_FL_ERR)) {
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if (s->si[1].state == SI_ST_EST || s->si[1].state == SI_ST_DIS) {
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s->si[1].shutr(&s->si[1]);
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s->si[1].shutw(&s->si[1]);
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stream_int_report_error(&s->si[1]);
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s->be->failed_resp++;
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if (s->srv)
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s->srv->failed_resp++;
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}
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/* note: maybe we should process connection errors here ? */
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}
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if (s->si[1].state == SI_ST_CON) {
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/* we were trying to establish a connection on the server side,
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* maybe it succeeded, maybe it failed, maybe we timed out, ...
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*/
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if (unlikely(!sess_update_st_con_tcp(s, &s->si[1])))
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sess_update_st_cer(s, &s->si[1]);
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else if (s->si[1].state == SI_ST_EST)
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sess_establish(s, &s->si[1]);
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/* state is now one of SI_ST_CON (still in progress), SI_ST_EST
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* (established), SI_ST_DIS (abort), SI_ST_CLO (last error),
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* SI_ST_ASS/SI_ST_TAR/SI_ST_REQ for retryable errors.
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*/
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}
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/* check buffer timeouts, and close the corresponding stream interfaces
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* for future reads or writes. Note: this will also concern upper layers
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* but we do not touch any other flag. We must be careful and correctly
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* detect state changes when calling them.
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*/
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if (unlikely(s->req->flags & (BF_READ_TIMEOUT|BF_WRITE_TIMEOUT))) {
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if (s->req->flags & BF_READ_TIMEOUT)
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s->req->prod->shutr(s->req->prod);
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if (s->req->flags & BF_WRITE_TIMEOUT)
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s->req->cons->shutw(s->req->cons);
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DPRINTF(stderr,
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"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
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now_ms, __FUNCTION__, __LINE__,
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t,
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s, s->flags,
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s->req, s->rep,
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s->req->rex, s->rep->wex,
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s->req->flags, s->rep->flags,
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s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
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s->rep->cons->err_type, s->req->cons->err_type,
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s->conn_retries);
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}
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if (unlikely(s->rep->flags & (BF_READ_TIMEOUT|BF_WRITE_TIMEOUT))) {
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if (s->rep->flags & BF_READ_TIMEOUT)
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s->rep->prod->shutr(s->rep->prod);
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if (s->rep->flags & BF_WRITE_TIMEOUT)
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s->rep->cons->shutw(s->rep->cons);
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DPRINTF(stderr,
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"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
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now_ms, __FUNCTION__, __LINE__,
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t,
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s, s->flags,
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s->req, s->rep,
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s->req->rex, s->rep->wex,
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s->req->flags, s->rep->flags,
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s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
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s->rep->cons->err_type, s->req->cons->err_type,
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s->conn_retries);
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}
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/* Check for connection closure */
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resync_stream_interface:
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DPRINTF(stderr,
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"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
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now_ms, __FUNCTION__, __LINE__,
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t,
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s, s->flags,
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s->req, s->rep,
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s->req->rex, s->rep->wex,
|
||||
s->req->flags, s->rep->flags,
|
||||
s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
|
||||
s->rep->cons->err_type, s->req->cons->err_type,
|
||||
s->conn_retries);
|
||||
|
||||
/* nothing special to be done on client side */
|
||||
if (unlikely(s->req->prod->state == SI_ST_DIS))
|
||||
s->req->prod->state = SI_ST_CLO;
|
||||
|
||||
/* When a server-side connection is released, we have to count it and
|
||||
* check for pending connections on this server.
|
||||
*/
|
||||
if (unlikely(s->req->cons->state == SI_ST_DIS)) {
|
||||
s->req->cons->state = SI_ST_CLO;
|
||||
if (s->srv) {
|
||||
if (s->flags & SN_CURR_SESS) {
|
||||
s->flags &= ~SN_CURR_SESS;
|
||||
s->srv->cur_sess--;
|
||||
}
|
||||
sess_change_server(s, NULL);
|
||||
if (may_dequeue_tasks(s->srv, s->be))
|
||||
process_srv_queue(s->srv);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Note: of the transient states (REQ, CER, DIS), only REQ may remain
|
||||
* at this point.
|
||||
*/
|
||||
|
||||
/**** Process layer 7 below ****/
|
||||
|
||||
resync = 0;
|
||||
|
||||
/* Analyse request */
|
||||
if ((s->req->flags & BF_MASK_ANALYSER) ||
|
||||
(s->req->flags ^ rqf_last) & BF_MASK_STATIC) {
|
||||
unsigned int flags = s->req->flags;
|
||||
|
||||
if (s->req->prod->state >= SI_ST_EST) {
|
||||
/* it's up to the analysers to reset write_ena */
|
||||
buffer_write_ena(s->req);
|
||||
if (s->req->analysers)
|
||||
process_request(s);
|
||||
}
|
||||
s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
if (s->req->flags != flags)
|
||||
resync = 1;
|
||||
}
|
||||
|
||||
/* reflect what the L7 analysers have seen last */
|
||||
rqf_last = s->req->flags;
|
||||
|
||||
/*
|
||||
* Now forward all shutdown requests between both sides of the buffer
|
||||
*/
|
||||
|
||||
/* first, let's check if the request buffer needs to shutdown(write) */
|
||||
if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_HIJACK|BF_WRITE_ENA|BF_SHUTR)) ==
|
||||
(BF_EMPTY|BF_WRITE_ENA|BF_SHUTR)))
|
||||
buffer_shutw_now(s->req);
|
||||
else if ((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_WRITE_ENA)) == (BF_EMPTY|BF_WRITE_ENA) &&
|
||||
(s->req->cons->state == SI_ST_EST) &&
|
||||
s->be->options & PR_O_FORCE_CLO &&
|
||||
s->rep->flags & BF_READ_ACTIVITY) {
|
||||
/* We want to force the connection to the server to close,
|
||||
* and the server has begun to respond. That's the right
|
||||
* time.
|
||||
*/
|
||||
buffer_shutw_now(s->req);
|
||||
}
|
||||
|
||||
/* shutdown(write) pending */
|
||||
if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW)) == BF_SHUTW_NOW))
|
||||
s->req->cons->shutw(s->req->cons);
|
||||
|
||||
/* shutdown(write) done on server side, we must stop the client too */
|
||||
if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTW))
|
||||
buffer_shutr_now(s->req);
|
||||
|
||||
/* shutdown(read) pending */
|
||||
if (unlikely((s->req->flags & (BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTR_NOW))
|
||||
s->req->prod->shutr(s->req->prod);
|
||||
|
||||
/* it's possible that an upper layer has requested a connection setup */
|
||||
if (s->req->cons->state == SI_ST_INI &&
|
||||
(s->req->flags & (BF_WRITE_ENA|BF_SHUTW|BF_SHUTW_NOW)) == BF_WRITE_ENA)
|
||||
s->req->cons->state = SI_ST_REQ;
|
||||
|
||||
/* we may have a pending connection request, or a connection waiting
|
||||
* for completion.
|
||||
*/
|
||||
if (s->si[1].state >= SI_ST_REQ && s->si[1].state < SI_ST_CON) {
|
||||
do {
|
||||
/* nb: step 1 might switch from QUE to ASS, but we first want
|
||||
* to give a chance to step 2 to perform a redirect if needed.
|
||||
*/
|
||||
if (s->si[1].state != SI_ST_REQ)
|
||||
sess_update_stream_int(s, &s->si[1]);
|
||||
if (s->si[1].state == SI_ST_REQ)
|
||||
sess_prepare_conn_req(s, &s->si[1]);
|
||||
|
||||
if (s->si[1].state == SI_ST_ASS && s->srv &&
|
||||
s->srv->rdr_len && (s->flags & SN_REDIRECTABLE))
|
||||
perform_http_redirect(s, &s->si[1]);
|
||||
} while (s->si[1].state == SI_ST_ASS);
|
||||
}
|
||||
|
||||
/*
|
||||
* Here we want to check if we need to resync or not.
|
||||
*/
|
||||
if ((s->req->flags ^ rqf_last) & BF_MASK_STATIC)
|
||||
resync = 1;
|
||||
|
||||
s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
|
||||
/* according to benchmarks, it makes sense to resync now */
|
||||
if (resync)
|
||||
goto resync_stream_interface;
|
||||
|
||||
|
||||
/* Analyse response */
|
||||
|
||||
if (unlikely(s->rep->flags & BF_HIJACK)) {
|
||||
/* In inject mode, we wake up everytime something has
|
||||
* happened on the write side of the buffer.
|
||||
*/
|
||||
unsigned int flags = s->rep->flags;
|
||||
|
||||
if ((s->rep->flags & (BF_WRITE_PARTIAL|BF_WRITE_ERROR|BF_SHUTW)) &&
|
||||
!(s->rep->flags & BF_FULL)) {
|
||||
produce_content(s);
|
||||
}
|
||||
s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
if (s->rep->flags != flags)
|
||||
resync = 1;
|
||||
}
|
||||
else if ((s->rep->flags & BF_MASK_ANALYSER) ||
|
||||
(s->rep->flags ^ rpf_last) & BF_MASK_STATIC) {
|
||||
unsigned int flags = s->rep->flags;
|
||||
|
||||
if (s->rep->prod->state >= SI_ST_EST) {
|
||||
/* it's up to the analysers to reset write_ena */
|
||||
buffer_write_ena(s->rep);
|
||||
if (s->rep->analysers)
|
||||
process_response(s);
|
||||
}
|
||||
s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
if (s->rep->flags != flags)
|
||||
resync = 1;
|
||||
}
|
||||
|
||||
/* reflect what the L7 analysers have seen last */
|
||||
rpf_last = s->rep->flags;
|
||||
|
||||
/*
|
||||
* Now forward all shutdown requests between both sides of the buffer
|
||||
*/
|
||||
|
||||
/*
|
||||
* FIXME: this is probably where we should produce error responses.
|
||||
*/
|
||||
|
||||
/* first, let's check if the request buffer needs to shutdown(write) */
|
||||
if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_HIJACK|BF_WRITE_ENA|BF_SHUTR)) ==
|
||||
(BF_EMPTY|BF_WRITE_ENA|BF_SHUTR)))
|
||||
buffer_shutw_now(s->rep);
|
||||
|
||||
/* shutdown(write) pending */
|
||||
if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW)) == BF_SHUTW_NOW))
|
||||
s->rep->cons->shutw(s->rep->cons);
|
||||
|
||||
/* shutdown(write) done on the client side, we must stop the server too */
|
||||
if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTW))
|
||||
buffer_shutr_now(s->rep);
|
||||
|
||||
/* shutdown(read) pending */
|
||||
if (unlikely((s->rep->flags & (BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTR_NOW))
|
||||
s->rep->prod->shutr(s->rep->prod);
|
||||
|
||||
/*
|
||||
* Here we want to check if we need to resync or not.
|
||||
*/
|
||||
if ((s->rep->flags ^ rpf_last) & BF_MASK_STATIC)
|
||||
resync = 1;
|
||||
|
||||
s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
|
||||
if (resync)
|
||||
goto resync_stream_interface;
|
||||
|
||||
|
||||
/* This is needed only when debugging is enabled, to indicate
|
||||
* client-side or server-side close. Please note that in the unlikely
|
||||
* event where both sides would close at once, the sequence is reported
|
||||
* on the server side first.
|
||||
*/
|
||||
if (unlikely((global.mode & MODE_DEBUG) &&
|
||||
(!(global.mode & MODE_QUIET) ||
|
||||
(global.mode & MODE_VERBOSE)))) {
|
||||
int len;
|
||||
|
||||
if (s->si[1].state == SI_ST_CLO &&
|
||||
s->si[1].prev_state == SI_ST_EST) {
|
||||
len = sprintf(trash, "%08x:%s.srvcls[%04x:%04x]\n",
|
||||
s->uniq_id, s->be->id,
|
||||
(unsigned short)s->si[0].fd,
|
||||
(unsigned short)s->si[1].fd);
|
||||
write(1, trash, len);
|
||||
}
|
||||
|
||||
if (s->si[0].state == SI_ST_CLO &&
|
||||
s->si[0].prev_state == SI_ST_EST) {
|
||||
len = sprintf(trash, "%08x:%s.clicls[%04x:%04x]\n",
|
||||
s->uniq_id, s->be->id,
|
||||
(unsigned short)s->si[0].fd,
|
||||
(unsigned short)s->si[1].fd);
|
||||
write(1, trash, len);
|
||||
}
|
||||
}
|
||||
|
||||
if (likely((s->rep->cons->state != SI_ST_CLO) ||
|
||||
(s->req->cons->state > SI_ST_INI && s->req->cons->state < SI_ST_CLO))) {
|
||||
|
||||
if ((s->fe->options & PR_O_CONTSTATS) && (s->flags & SN_BE_ASSIGNED))
|
||||
session_process_counters(s);
|
||||
|
||||
if (s->rep->cons->state == SI_ST_EST)
|
||||
stream_sock_data_finish(s->rep->cons->fd);
|
||||
|
||||
if (s->req->cons->state == SI_ST_EST)
|
||||
stream_sock_data_finish(s->req->cons->fd);
|
||||
|
||||
s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
s->si[0].prev_state = s->si[0].state;
|
||||
s->si[1].prev_state = s->si[1].state;
|
||||
s->si[0].flags = s->si[1].flags = SI_FL_NONE;
|
||||
|
||||
/* Trick: if a request is being waiting for the server to respond,
|
||||
* and if we know the server can timeout, we don't want the timeout
|
||||
* to expire on the client side first, but we're still interested
|
||||
* in passing data from the client to the server (eg: POST). Thus,
|
||||
* we can cancel the client's request timeout if the server's
|
||||
* request timeout is set and the server has not yet sent a response.
|
||||
*/
|
||||
|
||||
if ((s->rep->flags & (BF_WRITE_ENA|BF_SHUTR)) == 0 &&
|
||||
(tick_isset(s->req->wex) || tick_isset(s->rep->rex)))
|
||||
s->req->rex = TICK_ETERNITY;
|
||||
|
||||
t->expire = tick_first(tick_first(s->req->rex, s->req->wex),
|
||||
tick_first(s->rep->rex, s->rep->wex));
|
||||
if (s->req->analysers)
|
||||
t->expire = tick_first(t->expire, s->req->analyse_exp);
|
||||
|
||||
if (s->si[0].exp)
|
||||
t->expire = tick_first(t->expire, s->si[0].exp);
|
||||
|
||||
if (s->si[1].exp)
|
||||
t->expire = tick_first(t->expire, s->si[1].exp);
|
||||
|
||||
#ifdef DEBUG_FULL
|
||||
fprintf(stderr, "[%u] queuing with exp=%u req->rex=%u req->wex=%u req->ana_exp=%u rep->rex=%u rep->wex=%u, cs=%d, ss=%d\n",
|
||||
now_ms, t->expire, s->req->rex, s->req->wex, s->req->analyse_exp, s->rep->rex, s->rep->wex, s->si[0].state, s->si[1].state);
|
||||
#endif
|
||||
/* restore t to its place in the task list */
|
||||
task_queue(t);
|
||||
|
||||
#ifdef DEBUG_DEV
|
||||
/* this may only happen when no timeout is set or in case of an FSM bug */
|
||||
if (!t->expire)
|
||||
ABORT_NOW();
|
||||
#endif
|
||||
*next = t->expire;
|
||||
return; /* nothing more to do */
|
||||
}
|
||||
|
||||
s->fe->feconn--;
|
||||
if (s->flags & SN_BE_ASSIGNED)
|
||||
s->be->beconn--;
|
||||
actconn--;
|
||||
|
||||
if (unlikely((global.mode & MODE_DEBUG) &&
|
||||
(!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
|
||||
int len;
|
||||
len = sprintf(trash, "%08x:%s.closed[%04x:%04x] (term_trace=0x%08x)\n",
|
||||
s->uniq_id, s->be->id,
|
||||
(unsigned short)s->req->prod->fd, (unsigned short)s->req->cons->fd,
|
||||
s->term_trace);
|
||||
write(1, trash, len);
|
||||
}
|
||||
|
||||
s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
||||
session_process_counters(s);
|
||||
|
||||
/* let's do a final log if we need it */
|
||||
if (s->logs.logwait &&
|
||||
!(s->flags & SN_MONITOR) &&
|
||||
(!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
|
||||
if (s->fe->to_log & LW_REQ)
|
||||
http_sess_log(s);
|
||||
else
|
||||
tcp_sess_log(s);
|
||||
}
|
||||
|
||||
/* the task MUST not be in the run queue anymore */
|
||||
task_delete(t);
|
||||
session_free(s);
|
||||
task_free(t);
|
||||
*next = TICK_ETERNITY;
|
||||
}
|
||||
|
||||
|
||||
extern const char sess_term_cond[8];
|
||||
extern const char sess_fin_state[8];
|
||||
extern const char *monthname[12];
|
||||
@ -1392,7 +746,7 @@ struct pool_head *pool2_capture;
|
||||
* send a log for the session when we have enough info about it.
|
||||
* Will not log if the frontend has no log defined.
|
||||
*/
|
||||
static void http_sess_log(struct session *s)
|
||||
void http_sess_log(struct session *s)
|
||||
{
|
||||
char pn[INET6_ADDRSTRLEN + strlen(":65535")];
|
||||
struct proxy *fe = s->fe;
|
||||
@ -3732,215 +3086,6 @@ int process_response(struct session *t)
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* This function is called with (si->state == SI_ST_CON) meaning that a
|
||||
* connection was attempted and that the file descriptor is already allocated.
|
||||
* We must check for establishment, error and abort. Possible output states
|
||||
* are SI_ST_EST (established), SI_ST_CER (error), SI_ST_DIS (abort), and
|
||||
* SI_ST_CON (no change). The function returns 0 if it switches to SI_ST_CER,
|
||||
* otherwise 1.
|
||||
*/
|
||||
int sess_update_st_con_tcp(struct session *s, struct stream_interface *si)
|
||||
{
|
||||
struct buffer *req = si->ob;
|
||||
struct buffer *rep = si->ib;
|
||||
|
||||
DPRINTF(stderr,"[%u] %s: c=%s exp(r,w)=%u,%u req=%08x rep=%08x rql=%d rpl=%d, fds=%d\n",
|
||||
now_ms, __FUNCTION__,
|
||||
cli_stnames[s->cli_state],
|
||||
rep->rex, req->wex,
|
||||
req->flags, rep->flags,
|
||||
req->l, rep->l,
|
||||
fdtab[si->fd].state);
|
||||
|
||||
|
||||
/* If we got an error, or if nothing happened and the connection timed
|
||||
* out, we must give up. The CER state handler will take care of retry
|
||||
* attempts and error reports.
|
||||
*/
|
||||
if (unlikely(si->flags & (SI_FL_EXP|SI_FL_ERR))) {
|
||||
si->state = SI_ST_CER;
|
||||
fd_delete(si->fd);
|
||||
|
||||
if (si->err_type)
|
||||
return 0;
|
||||
|
||||
si->err_loc = s->srv;
|
||||
if (si->flags & SI_FL_ERR)
|
||||
si->err_type = SI_ET_CONN_ERR;
|
||||
else
|
||||
si->err_type = SI_ET_CONN_TO;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* OK, maybe we want to abort */
|
||||
if (unlikely((req->flags & BF_SHUTW_NOW) ||
|
||||
(rep->flags & BF_SHUTW) ||
|
||||
((req->flags & BF_SHUTR) && /* FIXME: this should not prevent a connection from establishing */
|
||||
((req->flags & BF_EMPTY && !(req->flags & BF_WRITE_ACTIVITY)) ||
|
||||
s->be->options & PR_O_ABRT_CLOSE)))) {
|
||||
/* give up */
|
||||
si->shutw(si);
|
||||
si->err_type |= SI_ET_CONN_ABRT;
|
||||
si->err_loc = s->srv;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* we need to wait a bit more if there was no activity either */
|
||||
if (!(req->flags & BF_WRITE_ACTIVITY))
|
||||
return 1;
|
||||
|
||||
/* OK, this means that a connection succeeded. The caller will be
|
||||
* responsible for handling the transition from CON to EST.
|
||||
*/
|
||||
s->logs.t_connect = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
||||
si->state = SI_ST_EST;
|
||||
si->err_type = SI_ET_NONE;
|
||||
si->err_loc = NULL;
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* This function handles the transition between the SI_ST_CON state and the
|
||||
* SI_ST_EST state. It must only be called after switching from SI_ST_CON to
|
||||
* SI_ST_EST.
|
||||
*/
|
||||
void sess_establish(struct session *s, struct stream_interface *si)
|
||||
{
|
||||
struct buffer *req = si->ob;
|
||||
struct buffer *rep = si->ib;
|
||||
|
||||
if (req->flags & BF_EMPTY) {
|
||||
EV_FD_CLR(si->fd, DIR_WR);
|
||||
req->wex = TICK_ETERNITY;
|
||||
} else {
|
||||
EV_FD_SET(si->fd, DIR_WR);
|
||||
req->wex = tick_add_ifset(now_ms, s->be->timeout.server);
|
||||
if (tick_isset(req->wex)) {
|
||||
/* FIXME: to prevent the server from expiring read
|
||||
* timeouts during writes, we refresh it. */
|
||||
rep->rex = req->wex;
|
||||
}
|
||||
}
|
||||
|
||||
if (s->be->mode == PR_MODE_TCP) { /* let's allow immediate data connection in this case */
|
||||
if (!(rep->flags & BF_HIJACK)) {
|
||||
EV_FD_SET(si->fd, DIR_RD);
|
||||
rep->rex = tick_add_ifset(now_ms, s->be->timeout.server);
|
||||
}
|
||||
buffer_set_rlim(rep, BUFSIZE); /* no rewrite needed */
|
||||
|
||||
/* if the user wants to log as soon as possible, without counting
|
||||
* bytes from the server, then this is the right moment. */
|
||||
if (s->fe->to_log && !(s->logs.logwait & LW_BYTES)) {
|
||||
s->logs.t_close = s->logs.t_connect; /* to get a valid end date */
|
||||
tcp_sess_log(s);
|
||||
}
|
||||
#ifdef CONFIG_HAP_TCPSPLICE
|
||||
if ((s->fe->options & s->be->options) & PR_O_TCPSPLICE) {
|
||||
/* TCP splicing supported by both FE and BE */
|
||||
tcp_splice_splicefd(req->prod->fd, si->fd, 0);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
else {
|
||||
rep->analysers |= AN_RTR_HTTP_HDR;
|
||||
buffer_set_rlim(rep, BUFSIZE - MAXREWRITE); /* rewrite needed */
|
||||
s->txn.rsp.msg_state = HTTP_MSG_RPBEFORE;
|
||||
/* reset hdr_idx which was already initialized by the request.
|
||||
* right now, the http parser does it.
|
||||
* hdr_idx_init(&s->txn.hdr_idx);
|
||||
*/
|
||||
}
|
||||
|
||||
rep->flags |= BF_READ_ATTACHED; /* producer is now attached */
|
||||
req->wex = TICK_ETERNITY;
|
||||
}
|
||||
|
||||
|
||||
/* This function is called with (si->state == SI_ST_CER) meaning that a
|
||||
* previous connection attempt has failed and that the file descriptor
|
||||
* has already been released. Possible causes include asynchronous error
|
||||
* notification and time out. Possible output states are SI_ST_CLO when
|
||||
* retries are exhausted, SI_ST_TAR when a delay is wanted before a new
|
||||
* connection attempt, SI_ST_ASS when it's wise to retry on the same server,
|
||||
* and SI_ST_REQ when an immediate redispatch is wanted. The buffers are
|
||||
* marked as in error state. It returns 0.
|
||||
*/
|
||||
int sess_update_st_cer(struct session *s, struct stream_interface *si)
|
||||
{
|
||||
/* we probably have to release last session from the server */
|
||||
if (s->srv) {
|
||||
if (s->flags & SN_CURR_SESS) {
|
||||
s->flags &= ~SN_CURR_SESS;
|
||||
s->srv->cur_sess--;
|
||||
}
|
||||
sess_change_server(s, NULL);
|
||||
}
|
||||
|
||||
/* ensure that we have enough retries left */
|
||||
s->conn_retries--;
|
||||
if (s->conn_retries < 0) {
|
||||
if (!si->err_type) {
|
||||
si->err_type = SI_ET_CONN_ERR;
|
||||
si->err_loc = s->srv;
|
||||
}
|
||||
|
||||
if (s->srv)
|
||||
s->srv->failed_conns++;
|
||||
s->be->failed_conns++;
|
||||
if (may_dequeue_tasks(s->srv, s->be))
|
||||
process_srv_queue(s->srv);
|
||||
|
||||
/* shutw is enough so stop a connecting socket */
|
||||
si->shutw(si);
|
||||
si->ob->flags |= BF_WRITE_ERROR;
|
||||
si->ib->flags |= BF_READ_ERROR;
|
||||
|
||||
si->state = SI_ST_CLO;
|
||||
return_srv_error(s, si->err_type);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* If the "redispatch" option is set on the backend, we are allowed to
|
||||
* retry on another server for the last retry. In order to achieve this,
|
||||
* we must mark the session unassigned, and eventually clear the DIRECT
|
||||
* bit to ignore any persistence cookie. We won't count a retry nor a
|
||||
* redispatch yet, because this will depend on what server is selected.
|
||||
*/
|
||||
if (s->srv && s->conn_retries == 0 && s->be->options & PR_O_REDISP) {
|
||||
if (may_dequeue_tasks(s->srv, s->be))
|
||||
process_srv_queue(s->srv);
|
||||
|
||||
s->flags &= ~(SN_DIRECT | SN_ASSIGNED | SN_ADDR_SET);
|
||||
s->prev_srv = s->srv;
|
||||
si->state = SI_ST_REQ;
|
||||
} else {
|
||||
if (s->srv)
|
||||
s->srv->retries++;
|
||||
s->be->retries++;
|
||||
si->state = SI_ST_ASS;
|
||||
}
|
||||
|
||||
if (si->flags & SI_FL_ERR) {
|
||||
/* The error was an asynchronous connection error, and we will
|
||||
* likely have to retry connecting to the same server, most
|
||||
* likely leading to the same result. To avoid this, we wait
|
||||
* one second before retrying.
|
||||
*/
|
||||
|
||||
if (!si->err_type)
|
||||
si->err_type = SI_ET_CONN_ERR;
|
||||
|
||||
si->state = SI_ST_TAR;
|
||||
si->exp = tick_add(now_ms, MS_TO_TICKS(1000));
|
||||
return 0;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Produces data for the session <s> depending on its source. Expects to be
|
||||
* called with client socket shut down on input. Right now, only statistics can
|
||||
|
846
src/session.c
846
src/session.c
@ -17,12 +17,19 @@
|
||||
#include <common/memory.h>
|
||||
|
||||
#include <types/capture.h>
|
||||
#include <types/global.h>
|
||||
|
||||
#include <proto/backend.h>
|
||||
#include <proto/buffers.h>
|
||||
#include <proto/hdr_idx.h>
|
||||
#include <proto/log.h>
|
||||
#include <proto/session.h>
|
||||
#include <proto/proto_http.h>
|
||||
#include <proto/proto_tcp.h>
|
||||
#include <proto/queue.h>
|
||||
#include <proto/stream_interface.h>
|
||||
#include <proto/stream_sock.h>
|
||||
#include <proto/task.h>
|
||||
|
||||
|
||||
struct pool_head *pool2_session;
|
||||
@ -132,6 +139,845 @@ void session_process_counters(struct session *s)
|
||||
}
|
||||
}
|
||||
|
||||
/* This function is called with (si->state == SI_ST_CON) meaning that a
|
||||
* connection was attempted and that the file descriptor is already allocated.
|
||||
* We must check for establishment, error and abort. Possible output states
|
||||
* are SI_ST_EST (established), SI_ST_CER (error), SI_ST_DIS (abort), and
|
||||
* SI_ST_CON (no change). The function returns 0 if it switches to SI_ST_CER,
|
||||
* otherwise 1.
|
||||
*/
|
||||
int sess_update_st_con_tcp(struct session *s, struct stream_interface *si)
|
||||
{
|
||||
struct buffer *req = si->ob;
|
||||
struct buffer *rep = si->ib;
|
||||
|
||||
DPRINTF(stderr,"[%u] %s: c=%s exp(r,w)=%u,%u req=%08x rep=%08x rql=%d rpl=%d, fds=%d\n",
|
||||
now_ms, __FUNCTION__,
|
||||
cli_stnames[s->cli_state],
|
||||
rep->rex, req->wex,
|
||||
req->flags, rep->flags,
|
||||
req->l, rep->l,
|
||||
fdtab[si->fd].state);
|
||||
|
||||
|
||||
/* If we got an error, or if nothing happened and the connection timed
|
||||
* out, we must give up. The CER state handler will take care of retry
|
||||
* attempts and error reports.
|
||||
*/
|
||||
if (unlikely(si->flags & (SI_FL_EXP|SI_FL_ERR))) {
|
||||
si->state = SI_ST_CER;
|
||||
fd_delete(si->fd);
|
||||
|
||||
if (si->err_type)
|
||||
return 0;
|
||||
|
||||
si->err_loc = s->srv;
|
||||
if (si->flags & SI_FL_ERR)
|
||||
si->err_type = SI_ET_CONN_ERR;
|
||||
else
|
||||
si->err_type = SI_ET_CONN_TO;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* OK, maybe we want to abort */
|
||||
if (unlikely((req->flags & BF_SHUTW_NOW) ||
|
||||
(rep->flags & BF_SHUTW) ||
|
||||
((req->flags & BF_SHUTR) && /* FIXME: this should not prevent a connection from establishing */
|
||||
((req->flags & BF_EMPTY && !(req->flags & BF_WRITE_ACTIVITY)) ||
|
||||
s->be->options & PR_O_ABRT_CLOSE)))) {
|
||||
/* give up */
|
||||
si->shutw(si);
|
||||
si->err_type |= SI_ET_CONN_ABRT;
|
||||
si->err_loc = s->srv;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* we need to wait a bit more if there was no activity either */
|
||||
if (!(req->flags & BF_WRITE_ACTIVITY))
|
||||
return 1;
|
||||
|
||||
/* OK, this means that a connection succeeded. The caller will be
|
||||
* responsible for handling the transition from CON to EST.
|
||||
*/
|
||||
s->logs.t_connect = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
||||
si->state = SI_ST_EST;
|
||||
si->err_type = SI_ET_NONE;
|
||||
si->err_loc = NULL;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* This function is called with (si->state == SI_ST_CER) meaning that a
|
||||
* previous connection attempt has failed and that the file descriptor
|
||||
* has already been released. Possible causes include asynchronous error
|
||||
* notification and time out. Possible output states are SI_ST_CLO when
|
||||
* retries are exhausted, SI_ST_TAR when a delay is wanted before a new
|
||||
* connection attempt, SI_ST_ASS when it's wise to retry on the same server,
|
||||
* and SI_ST_REQ when an immediate redispatch is wanted. The buffers are
|
||||
* marked as in error state. It returns 0.
|
||||
*/
|
||||
int sess_update_st_cer(struct session *s, struct stream_interface *si)
|
||||
{
|
||||
/* we probably have to release last session from the server */
|
||||
if (s->srv) {
|
||||
if (s->flags & SN_CURR_SESS) {
|
||||
s->flags &= ~SN_CURR_SESS;
|
||||
s->srv->cur_sess--;
|
||||
}
|
||||
sess_change_server(s, NULL);
|
||||
}
|
||||
|
||||
/* ensure that we have enough retries left */
|
||||
s->conn_retries--;
|
||||
if (s->conn_retries < 0) {
|
||||
if (!si->err_type) {
|
||||
si->err_type = SI_ET_CONN_ERR;
|
||||
si->err_loc = s->srv;
|
||||
}
|
||||
|
||||
if (s->srv)
|
||||
s->srv->failed_conns++;
|
||||
s->be->failed_conns++;
|
||||
if (may_dequeue_tasks(s->srv, s->be))
|
||||
process_srv_queue(s->srv);
|
||||
|
||||
/* shutw is enough so stop a connecting socket */
|
||||
si->shutw(si);
|
||||
si->ob->flags |= BF_WRITE_ERROR;
|
||||
si->ib->flags |= BF_READ_ERROR;
|
||||
|
||||
si->state = SI_ST_CLO;
|
||||
return_srv_error(s, si->err_type);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* If the "redispatch" option is set on the backend, we are allowed to
|
||||
* retry on another server for the last retry. In order to achieve this,
|
||||
* we must mark the session unassigned, and eventually clear the DIRECT
|
||||
* bit to ignore any persistence cookie. We won't count a retry nor a
|
||||
* redispatch yet, because this will depend on what server is selected.
|
||||
*/
|
||||
if (s->srv && s->conn_retries == 0 && s->be->options & PR_O_REDISP) {
|
||||
if (may_dequeue_tasks(s->srv, s->be))
|
||||
process_srv_queue(s->srv);
|
||||
|
||||
s->flags &= ~(SN_DIRECT | SN_ASSIGNED | SN_ADDR_SET);
|
||||
s->prev_srv = s->srv;
|
||||
si->state = SI_ST_REQ;
|
||||
} else {
|
||||
if (s->srv)
|
||||
s->srv->retries++;
|
||||
s->be->retries++;
|
||||
si->state = SI_ST_ASS;
|
||||
}
|
||||
|
||||
if (si->flags & SI_FL_ERR) {
|
||||
/* The error was an asynchronous connection error, and we will
|
||||
* likely have to retry connecting to the same server, most
|
||||
* likely leading to the same result. To avoid this, we wait
|
||||
* one second before retrying.
|
||||
*/
|
||||
|
||||
if (!si->err_type)
|
||||
si->err_type = SI_ET_CONN_ERR;
|
||||
|
||||
si->state = SI_ST_TAR;
|
||||
si->exp = tick_add(now_ms, MS_TO_TICKS(1000));
|
||||
return 0;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* This function handles the transition between the SI_ST_CON state and the
|
||||
* SI_ST_EST state. It must only be called after switching from SI_ST_CON to
|
||||
* SI_ST_EST.
|
||||
*/
|
||||
void sess_establish(struct session *s, struct stream_interface *si)
|
||||
{
|
||||
struct buffer *req = si->ob;
|
||||
struct buffer *rep = si->ib;
|
||||
|
||||
if (req->flags & BF_EMPTY) {
|
||||
EV_FD_CLR(si->fd, DIR_WR);
|
||||
req->wex = TICK_ETERNITY;
|
||||
} else {
|
||||
EV_FD_SET(si->fd, DIR_WR);
|
||||
req->wex = tick_add_ifset(now_ms, s->be->timeout.server);
|
||||
if (tick_isset(req->wex)) {
|
||||
/* FIXME: to prevent the server from expiring read
|
||||
* timeouts during writes, we refresh it. */
|
||||
rep->rex = req->wex;
|
||||
}
|
||||
}
|
||||
|
||||
if (s->be->mode == PR_MODE_TCP) { /* let's allow immediate data connection in this case */
|
||||
if (!(rep->flags & BF_HIJACK)) {
|
||||
EV_FD_SET(si->fd, DIR_RD);
|
||||
rep->rex = tick_add_ifset(now_ms, s->be->timeout.server);
|
||||
}
|
||||
buffer_set_rlim(rep, BUFSIZE); /* no rewrite needed */
|
||||
|
||||
/* if the user wants to log as soon as possible, without counting
|
||||
* bytes from the server, then this is the right moment. */
|
||||
if (s->fe->to_log && !(s->logs.logwait & LW_BYTES)) {
|
||||
s->logs.t_close = s->logs.t_connect; /* to get a valid end date */
|
||||
tcp_sess_log(s);
|
||||
}
|
||||
#ifdef CONFIG_HAP_TCPSPLICE
|
||||
if ((s->fe->options & s->be->options) & PR_O_TCPSPLICE) {
|
||||
/* TCP splicing supported by both FE and BE */
|
||||
tcp_splice_splicefd(req->prod->fd, si->fd, 0);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
else {
|
||||
rep->analysers |= AN_RTR_HTTP_HDR;
|
||||
buffer_set_rlim(rep, BUFSIZE - MAXREWRITE); /* rewrite needed */
|
||||
s->txn.rsp.msg_state = HTTP_MSG_RPBEFORE;
|
||||
/* reset hdr_idx which was already initialized by the request.
|
||||
* right now, the http parser does it.
|
||||
* hdr_idx_init(&s->txn.hdr_idx);
|
||||
*/
|
||||
}
|
||||
|
||||
rep->flags |= BF_READ_ATTACHED; /* producer is now attached */
|
||||
req->wex = TICK_ETERNITY;
|
||||
}
|
||||
|
||||
/* Update stream interface status for input states SI_ST_ASS, SI_ST_QUE, SI_ST_TAR.
|
||||
* Other input states are simply ignored.
|
||||
* Possible output states are SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ, SI_ST_CON.
|
||||
* Flags must have previously been updated for timeouts and other conditions.
|
||||
*/
|
||||
void sess_update_stream_int(struct session *s, struct stream_interface *si)
|
||||
{
|
||||
DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d\n",
|
||||
now_ms, __FUNCTION__,
|
||||
s,
|
||||
s->req, s->rep,
|
||||
s->req->rex, s->rep->wex,
|
||||
s->req->flags, s->rep->flags,
|
||||
s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state);
|
||||
|
||||
if (si->state == SI_ST_ASS) {
|
||||
/* Server assigned to connection request, we have to try to connect now */
|
||||
int conn_err;
|
||||
|
||||
conn_err = connect_server(s);
|
||||
if (conn_err == SN_ERR_NONE) {
|
||||
/* state = SI_ST_CON now */
|
||||
return;
|
||||
}
|
||||
|
||||
/* We have received a synchronous error. We might have to
|
||||
* abort, retry immediately or redispatch.
|
||||
*/
|
||||
if (conn_err == SN_ERR_INTERNAL) {
|
||||
if (!si->err_type) {
|
||||
si->err_type = SI_ET_CONN_OTHER;
|
||||
si->err_loc = s->srv;
|
||||
}
|
||||
|
||||
if (s->srv)
|
||||
s->srv->cum_sess++;
|
||||
if (s->srv)
|
||||
s->srv->failed_conns++;
|
||||
s->be->failed_conns++;
|
||||
|
||||
/* release other sessions waiting for this server */
|
||||
if (may_dequeue_tasks(s->srv, s->be))
|
||||
process_srv_queue(s->srv);
|
||||
|
||||
/* Failed and not retryable. */
|
||||
si->shutr(si);
|
||||
si->shutw(si);
|
||||
si->ob->flags |= BF_WRITE_ERROR;
|
||||
|
||||
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
||||
|
||||
/* no session was ever accounted for this server */
|
||||
si->state = SI_ST_CLO;
|
||||
return_srv_error(s, si->err_type);
|
||||
return;
|
||||
}
|
||||
|
||||
/* We are facing a retryable error, but we don't want to run a
|
||||
* turn-around now, as the problem is likely a source port
|
||||
* allocation problem, so we want to retry now.
|
||||
*/
|
||||
si->state = SI_ST_CER;
|
||||
si->flags &= ~SI_FL_ERR;
|
||||
sess_update_st_cer(s, si);
|
||||
/* now si->state is one of SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ */
|
||||
return;
|
||||
}
|
||||
else if (si->state == SI_ST_QUE) {
|
||||
/* connection request was queued, check for any update */
|
||||
if (!s->pend_pos) {
|
||||
/* The connection is not in the queue anymore. Either
|
||||
* we have a server connection slot available and we
|
||||
* go directly to the assigned state, or we need to
|
||||
* load-balance first and go to the INI state.
|
||||
*/
|
||||
si->exp = TICK_ETERNITY;
|
||||
if (unlikely(!(s->flags & SN_ASSIGNED)))
|
||||
si->state = SI_ST_REQ;
|
||||
else {
|
||||
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
||||
si->state = SI_ST_ASS;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
/* Connection request still in queue... */
|
||||
if (si->flags & SI_FL_EXP) {
|
||||
/* ... and timeout expired */
|
||||
si->exp = TICK_ETERNITY;
|
||||
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
||||
if (s->srv)
|
||||
s->srv->failed_conns++;
|
||||
s->be->failed_conns++;
|
||||
si->shutr(si);
|
||||
si->shutw(si);
|
||||
si->ob->flags |= BF_WRITE_TIMEOUT;
|
||||
if (!si->err_type)
|
||||
si->err_type = SI_ET_QUEUE_TO;
|
||||
si->state = SI_ST_CLO;
|
||||
return_srv_error(s, si->err_type);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Connection remains in queue, check if we have to abort it */
|
||||
if ((si->ob->flags & (BF_READ_ERROR|BF_SHUTW_NOW)) || /* abort requested */
|
||||
((si->ob->flags & BF_SHUTR) && /* empty and client stopped */
|
||||
(si->ob->flags & BF_EMPTY || s->be->options & PR_O_ABRT_CLOSE))) {
|
||||
/* give up */
|
||||
si->exp = TICK_ETERNITY;
|
||||
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
||||
si->shutr(si);
|
||||
si->shutw(si);
|
||||
si->err_type |= SI_ET_QUEUE_ABRT;
|
||||
si->state = SI_ST_CLO;
|
||||
return_srv_error(s, si->err_type);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Nothing changed */
|
||||
return;
|
||||
}
|
||||
else if (si->state == SI_ST_TAR) {
|
||||
/* Connection request might be aborted */
|
||||
if ((si->ob->flags & (BF_READ_ERROR|BF_SHUTW_NOW)) || /* abort requested */
|
||||
((si->ob->flags & BF_SHUTR) && /* empty and client stopped */
|
||||
(si->ob->flags & BF_EMPTY || s->be->options & PR_O_ABRT_CLOSE))) {
|
||||
/* give up */
|
||||
si->exp = TICK_ETERNITY;
|
||||
si->shutr(si);
|
||||
si->shutw(si);
|
||||
si->err_type |= SI_ET_CONN_ABRT;
|
||||
si->state = SI_ST_CLO;
|
||||
return_srv_error(s, si->err_type);
|
||||
return;
|
||||
}
|
||||
|
||||
if (!(si->flags & SI_FL_EXP))
|
||||
return; /* still in turn-around */
|
||||
|
||||
si->exp = TICK_ETERNITY;
|
||||
|
||||
/* we keep trying on the same server as long as the session is
|
||||
* marked "assigned".
|
||||
* FIXME: Should we force a redispatch attempt when the server is down ?
|
||||
*/
|
||||
if (s->flags & SN_ASSIGNED)
|
||||
si->state = SI_ST_ASS;
|
||||
else
|
||||
si->state = SI_ST_REQ;
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
/* This function initiates a server connection request on a stream interface
|
||||
* already in SI_ST_REQ state. Upon success, the state goes to SI_ST_ASS,
|
||||
* indicating that a server has been assigned. It may also return SI_ST_QUE,
|
||||
* or SI_ST_CLO upon error.
|
||||
*/
|
||||
static void sess_prepare_conn_req(struct session *s, struct stream_interface *si) {
|
||||
DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d\n",
|
||||
now_ms, __FUNCTION__,
|
||||
s,
|
||||
s->req, s->rep,
|
||||
s->req->rex, s->rep->wex,
|
||||
s->req->flags, s->rep->flags,
|
||||
s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state);
|
||||
|
||||
if (si->state != SI_ST_REQ)
|
||||
return;
|
||||
|
||||
/* Try to assign a server */
|
||||
if (srv_redispatch_connect(s) != 0) {
|
||||
/* We did not get a server. Either we queued the
|
||||
* connection request, or we encountered an error.
|
||||
*/
|
||||
if (si->state == SI_ST_QUE)
|
||||
return;
|
||||
|
||||
/* we did not get any server, let's check the cause */
|
||||
si->shutr(si);
|
||||
si->shutw(si);
|
||||
si->ob->flags |= BF_WRITE_ERROR;
|
||||
if (!si->err_type)
|
||||
si->err_type = SI_ET_CONN_OTHER;
|
||||
si->state = SI_ST_CLO;
|
||||
return_srv_error(s, si->err_type);
|
||||
return;
|
||||
}
|
||||
|
||||
/* The server is assigned */
|
||||
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
||||
si->state = SI_ST_ASS;
|
||||
}
|
||||
|
||||
/* Processes the client, server, request and response jobs of a session task,
|
||||
* then puts it back to the wait queue in a clean state, or cleans up its
|
||||
* resources if it must be deleted. Returns in <next> the date the task wants
|
||||
* to be woken up, or TICK_ETERNITY. In order not to call all functions for
|
||||
* nothing too many times, the request and response buffers flags are monitored
|
||||
* and each function is called only if at least another function has changed at
|
||||
* least one flag it is interested in.
|
||||
*/
|
||||
void process_session(struct task *t, int *next)
|
||||
{
|
||||
struct session *s = t->context;
|
||||
int resync;
|
||||
unsigned int rqf_last, rpf_last;
|
||||
|
||||
//DPRINTF(stderr, "%s:%d: cs=%d ss=%d(%d) rqf=0x%08x rpf=0x%08x\n", __FUNCTION__, __LINE__,
|
||||
// s->si[0].state, s->si[1].state, s->si[1].err_type, s->req->flags, s->rep->flags);
|
||||
|
||||
/* 1a: Check for low level timeouts if needed. We just set a flag on
|
||||
* stream interfaces when their timeouts have expired.
|
||||
*/
|
||||
if (unlikely(t->state & TASK_WOKEN_TIMER)) {
|
||||
stream_int_check_timeouts(&s->si[0]);
|
||||
stream_int_check_timeouts(&s->si[1]);
|
||||
buffer_check_timeouts(s->req);
|
||||
buffer_check_timeouts(s->rep);
|
||||
}
|
||||
|
||||
/* copy req/rep flags so that we can detect shutdowns */
|
||||
rqf_last = s->req->flags;
|
||||
rpf_last = s->rep->flags;
|
||||
|
||||
/* 1b: check for low-level errors reported at the stream interface.
|
||||
* First we check if it's a retryable error (in which case we don't
|
||||
* want to tell the buffer). Otherwise we report the error one level
|
||||
* upper by setting flags into the buffers. Note that the side towards
|
||||
* the client cannot have connect (hence retryable) errors. Also, the
|
||||
* connection setup code must be able to deal with any type of abort.
|
||||
*/
|
||||
if (unlikely(s->si[0].flags & SI_FL_ERR)) {
|
||||
if (s->si[0].state == SI_ST_EST || s->si[0].state == SI_ST_DIS) {
|
||||
s->si[0].shutr(&s->si[0]);
|
||||
s->si[0].shutw(&s->si[0]);
|
||||
stream_int_report_error(&s->si[0]);
|
||||
}
|
||||
}
|
||||
|
||||
if (unlikely(s->si[1].flags & SI_FL_ERR)) {
|
||||
if (s->si[1].state == SI_ST_EST || s->si[1].state == SI_ST_DIS) {
|
||||
s->si[1].shutr(&s->si[1]);
|
||||
s->si[1].shutw(&s->si[1]);
|
||||
stream_int_report_error(&s->si[1]);
|
||||
s->be->failed_resp++;
|
||||
if (s->srv)
|
||||
s->srv->failed_resp++;
|
||||
}
|
||||
/* note: maybe we should process connection errors here ? */
|
||||
}
|
||||
|
||||
if (s->si[1].state == SI_ST_CON) {
|
||||
/* we were trying to establish a connection on the server side,
|
||||
* maybe it succeeded, maybe it failed, maybe we timed out, ...
|
||||
*/
|
||||
if (unlikely(!sess_update_st_con_tcp(s, &s->si[1])))
|
||||
sess_update_st_cer(s, &s->si[1]);
|
||||
else if (s->si[1].state == SI_ST_EST)
|
||||
sess_establish(s, &s->si[1]);
|
||||
|
||||
/* state is now one of SI_ST_CON (still in progress), SI_ST_EST
|
||||
* (established), SI_ST_DIS (abort), SI_ST_CLO (last error),
|
||||
* SI_ST_ASS/SI_ST_TAR/SI_ST_REQ for retryable errors.
|
||||
*/
|
||||
}
|
||||
|
||||
/* check buffer timeouts, and close the corresponding stream interfaces
|
||||
* for future reads or writes. Note: this will also concern upper layers
|
||||
* but we do not touch any other flag. We must be careful and correctly
|
||||
* detect state changes when calling them.
|
||||
*/
|
||||
if (unlikely(s->req->flags & (BF_READ_TIMEOUT|BF_WRITE_TIMEOUT))) {
|
||||
if (s->req->flags & BF_READ_TIMEOUT)
|
||||
s->req->prod->shutr(s->req->prod);
|
||||
if (s->req->flags & BF_WRITE_TIMEOUT)
|
||||
s->req->cons->shutw(s->req->cons);
|
||||
DPRINTF(stderr,
|
||||
"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
|
||||
now_ms, __FUNCTION__, __LINE__,
|
||||
t,
|
||||
s, s->flags,
|
||||
s->req, s->rep,
|
||||
s->req->rex, s->rep->wex,
|
||||
s->req->flags, s->rep->flags,
|
||||
s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
|
||||
s->rep->cons->err_type, s->req->cons->err_type,
|
||||
s->conn_retries);
|
||||
}
|
||||
|
||||
if (unlikely(s->rep->flags & (BF_READ_TIMEOUT|BF_WRITE_TIMEOUT))) {
|
||||
if (s->rep->flags & BF_READ_TIMEOUT)
|
||||
s->rep->prod->shutr(s->rep->prod);
|
||||
if (s->rep->flags & BF_WRITE_TIMEOUT)
|
||||
s->rep->cons->shutw(s->rep->cons);
|
||||
DPRINTF(stderr,
|
||||
"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
|
||||
now_ms, __FUNCTION__, __LINE__,
|
||||
t,
|
||||
s, s->flags,
|
||||
s->req, s->rep,
|
||||
s->req->rex, s->rep->wex,
|
||||
s->req->flags, s->rep->flags,
|
||||
s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
|
||||
s->rep->cons->err_type, s->req->cons->err_type,
|
||||
s->conn_retries);
|
||||
}
|
||||
|
||||
/* Check for connection closure */
|
||||
|
||||
resync_stream_interface:
|
||||
DPRINTF(stderr,
|
||||
"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rql=%d rpl=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
|
||||
now_ms, __FUNCTION__, __LINE__,
|
||||
t,
|
||||
s, s->flags,
|
||||
s->req, s->rep,
|
||||
s->req->rex, s->rep->wex,
|
||||
s->req->flags, s->rep->flags,
|
||||
s->req->l, s->rep->l, s->rep->cons->state, s->req->cons->state,
|
||||
s->rep->cons->err_type, s->req->cons->err_type,
|
||||
s->conn_retries);
|
||||
|
||||
/* nothing special to be done on client side */
|
||||
if (unlikely(s->req->prod->state == SI_ST_DIS))
|
||||
s->req->prod->state = SI_ST_CLO;
|
||||
|
||||
/* When a server-side connection is released, we have to count it and
|
||||
* check for pending connections on this server.
|
||||
*/
|
||||
if (unlikely(s->req->cons->state == SI_ST_DIS)) {
|
||||
s->req->cons->state = SI_ST_CLO;
|
||||
if (s->srv) {
|
||||
if (s->flags & SN_CURR_SESS) {
|
||||
s->flags &= ~SN_CURR_SESS;
|
||||
s->srv->cur_sess--;
|
||||
}
|
||||
sess_change_server(s, NULL);
|
||||
if (may_dequeue_tasks(s->srv, s->be))
|
||||
process_srv_queue(s->srv);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Note: of the transient states (REQ, CER, DIS), only REQ may remain
|
||||
* at this point.
|
||||
*/
|
||||
|
||||
/**** Process layer 7 below ****/
|
||||
|
||||
resync = 0;
|
||||
|
||||
/* Analyse request */
|
||||
if ((s->req->flags & BF_MASK_ANALYSER) ||
|
||||
(s->req->flags ^ rqf_last) & BF_MASK_STATIC) {
|
||||
unsigned int flags = s->req->flags;
|
||||
|
||||
if (s->req->prod->state >= SI_ST_EST) {
|
||||
/* it's up to the analysers to reset write_ena */
|
||||
buffer_write_ena(s->req);
|
||||
if (s->req->analysers)
|
||||
process_request(s);
|
||||
}
|
||||
s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
if (s->req->flags != flags)
|
||||
resync = 1;
|
||||
}
|
||||
|
||||
/* reflect what the L7 analysers have seen last */
|
||||
rqf_last = s->req->flags;
|
||||
|
||||
/*
|
||||
* Now forward all shutdown requests between both sides of the buffer
|
||||
*/
|
||||
|
||||
/* first, let's check if the request buffer needs to shutdown(write) */
|
||||
if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_HIJACK|BF_WRITE_ENA|BF_SHUTR)) ==
|
||||
(BF_EMPTY|BF_WRITE_ENA|BF_SHUTR)))
|
||||
buffer_shutw_now(s->req);
|
||||
else if ((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_WRITE_ENA)) == (BF_EMPTY|BF_WRITE_ENA) &&
|
||||
(s->req->cons->state == SI_ST_EST) &&
|
||||
s->be->options & PR_O_FORCE_CLO &&
|
||||
s->rep->flags & BF_READ_ACTIVITY) {
|
||||
/* We want to force the connection to the server to close,
|
||||
* and the server has begun to respond. That's the right
|
||||
* time.
|
||||
*/
|
||||
buffer_shutw_now(s->req);
|
||||
}
|
||||
|
||||
/* shutdown(write) pending */
|
||||
if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTW_NOW)) == BF_SHUTW_NOW))
|
||||
s->req->cons->shutw(s->req->cons);
|
||||
|
||||
/* shutdown(write) done on server side, we must stop the client too */
|
||||
if (unlikely((s->req->flags & (BF_SHUTW|BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTW))
|
||||
buffer_shutr_now(s->req);
|
||||
|
||||
/* shutdown(read) pending */
|
||||
if (unlikely((s->req->flags & (BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTR_NOW))
|
||||
s->req->prod->shutr(s->req->prod);
|
||||
|
||||
/* it's possible that an upper layer has requested a connection setup */
|
||||
if (s->req->cons->state == SI_ST_INI &&
|
||||
(s->req->flags & (BF_WRITE_ENA|BF_SHUTW|BF_SHUTW_NOW)) == BF_WRITE_ENA)
|
||||
s->req->cons->state = SI_ST_REQ;
|
||||
|
||||
/* we may have a pending connection request, or a connection waiting
|
||||
* for completion.
|
||||
*/
|
||||
if (s->si[1].state >= SI_ST_REQ && s->si[1].state < SI_ST_CON) {
|
||||
do {
|
||||
/* nb: step 1 might switch from QUE to ASS, but we first want
|
||||
* to give a chance to step 2 to perform a redirect if needed.
|
||||
*/
|
||||
if (s->si[1].state != SI_ST_REQ)
|
||||
sess_update_stream_int(s, &s->si[1]);
|
||||
if (s->si[1].state == SI_ST_REQ)
|
||||
sess_prepare_conn_req(s, &s->si[1]);
|
||||
|
||||
if (s->si[1].state == SI_ST_ASS && s->srv &&
|
||||
s->srv->rdr_len && (s->flags & SN_REDIRECTABLE))
|
||||
perform_http_redirect(s, &s->si[1]);
|
||||
} while (s->si[1].state == SI_ST_ASS);
|
||||
}
|
||||
|
||||
/*
|
||||
* Here we want to check if we need to resync or not.
|
||||
*/
|
||||
if ((s->req->flags ^ rqf_last) & BF_MASK_STATIC)
|
||||
resync = 1;
|
||||
|
||||
s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
|
||||
/* according to benchmarks, it makes sense to resync now */
|
||||
if (resync)
|
||||
goto resync_stream_interface;
|
||||
|
||||
|
||||
/* Analyse response */
|
||||
|
||||
if (unlikely(s->rep->flags & BF_HIJACK)) {
|
||||
/* In inject mode, we wake up everytime something has
|
||||
* happened on the write side of the buffer.
|
||||
*/
|
||||
unsigned int flags = s->rep->flags;
|
||||
|
||||
if ((s->rep->flags & (BF_WRITE_PARTIAL|BF_WRITE_ERROR|BF_SHUTW)) &&
|
||||
!(s->rep->flags & BF_FULL)) {
|
||||
produce_content(s);
|
||||
}
|
||||
s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
if (s->rep->flags != flags)
|
||||
resync = 1;
|
||||
}
|
||||
else if ((s->rep->flags & BF_MASK_ANALYSER) ||
|
||||
(s->rep->flags ^ rpf_last) & BF_MASK_STATIC) {
|
||||
unsigned int flags = s->rep->flags;
|
||||
|
||||
if (s->rep->prod->state >= SI_ST_EST) {
|
||||
/* it's up to the analysers to reset write_ena */
|
||||
buffer_write_ena(s->rep);
|
||||
if (s->rep->analysers)
|
||||
process_response(s);
|
||||
}
|
||||
s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
if (s->rep->flags != flags)
|
||||
resync = 1;
|
||||
}
|
||||
|
||||
/* reflect what the L7 analysers have seen last */
|
||||
rpf_last = s->rep->flags;
|
||||
|
||||
/*
|
||||
* Now forward all shutdown requests between both sides of the buffer
|
||||
*/
|
||||
|
||||
/*
|
||||
* FIXME: this is probably where we should produce error responses.
|
||||
*/
|
||||
|
||||
/* first, let's check if the request buffer needs to shutdown(write) */
|
||||
if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW|BF_EMPTY|BF_HIJACK|BF_WRITE_ENA|BF_SHUTR)) ==
|
||||
(BF_EMPTY|BF_WRITE_ENA|BF_SHUTR)))
|
||||
buffer_shutw_now(s->rep);
|
||||
|
||||
/* shutdown(write) pending */
|
||||
if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTW_NOW)) == BF_SHUTW_NOW))
|
||||
s->rep->cons->shutw(s->rep->cons);
|
||||
|
||||
/* shutdown(write) done on the client side, we must stop the server too */
|
||||
if (unlikely((s->rep->flags & (BF_SHUTW|BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTW))
|
||||
buffer_shutr_now(s->rep);
|
||||
|
||||
/* shutdown(read) pending */
|
||||
if (unlikely((s->rep->flags & (BF_SHUTR|BF_SHUTR_NOW)) == BF_SHUTR_NOW))
|
||||
s->rep->prod->shutr(s->rep->prod);
|
||||
|
||||
/*
|
||||
* Here we want to check if we need to resync or not.
|
||||
*/
|
||||
if ((s->rep->flags ^ rpf_last) & BF_MASK_STATIC)
|
||||
resync = 1;
|
||||
|
||||
s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
|
||||
if (resync)
|
||||
goto resync_stream_interface;
|
||||
|
||||
|
||||
/* This is needed only when debugging is enabled, to indicate
|
||||
* client-side or server-side close. Please note that in the unlikely
|
||||
* event where both sides would close at once, the sequence is reported
|
||||
* on the server side first.
|
||||
*/
|
||||
if (unlikely((global.mode & MODE_DEBUG) &&
|
||||
(!(global.mode & MODE_QUIET) ||
|
||||
(global.mode & MODE_VERBOSE)))) {
|
||||
int len;
|
||||
|
||||
if (s->si[1].state == SI_ST_CLO &&
|
||||
s->si[1].prev_state == SI_ST_EST) {
|
||||
len = sprintf(trash, "%08x:%s.srvcls[%04x:%04x]\n",
|
||||
s->uniq_id, s->be->id,
|
||||
(unsigned short)s->si[0].fd,
|
||||
(unsigned short)s->si[1].fd);
|
||||
write(1, trash, len);
|
||||
}
|
||||
|
||||
if (s->si[0].state == SI_ST_CLO &&
|
||||
s->si[0].prev_state == SI_ST_EST) {
|
||||
len = sprintf(trash, "%08x:%s.clicls[%04x:%04x]\n",
|
||||
s->uniq_id, s->be->id,
|
||||
(unsigned short)s->si[0].fd,
|
||||
(unsigned short)s->si[1].fd);
|
||||
write(1, trash, len);
|
||||
}
|
||||
}
|
||||
|
||||
if (likely((s->rep->cons->state != SI_ST_CLO) ||
|
||||
(s->req->cons->state > SI_ST_INI && s->req->cons->state < SI_ST_CLO))) {
|
||||
|
||||
if ((s->fe->options & PR_O_CONTSTATS) && (s->flags & SN_BE_ASSIGNED))
|
||||
session_process_counters(s);
|
||||
|
||||
if (s->rep->cons->state == SI_ST_EST)
|
||||
stream_sock_data_finish(s->rep->cons->fd);
|
||||
|
||||
if (s->req->cons->state == SI_ST_EST)
|
||||
stream_sock_data_finish(s->req->cons->fd);
|
||||
|
||||
s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE & BF_CLEAR_TIMEOUT;
|
||||
s->si[0].prev_state = s->si[0].state;
|
||||
s->si[1].prev_state = s->si[1].state;
|
||||
s->si[0].flags = s->si[1].flags = SI_FL_NONE;
|
||||
|
||||
/* Trick: if a request is being waiting for the server to respond,
|
||||
* and if we know the server can timeout, we don't want the timeout
|
||||
* to expire on the client side first, but we're still interested
|
||||
* in passing data from the client to the server (eg: POST). Thus,
|
||||
* we can cancel the client's request timeout if the server's
|
||||
* request timeout is set and the server has not yet sent a response.
|
||||
*/
|
||||
|
||||
if ((s->rep->flags & (BF_WRITE_ENA|BF_SHUTR)) == 0 &&
|
||||
(tick_isset(s->req->wex) || tick_isset(s->rep->rex)))
|
||||
s->req->rex = TICK_ETERNITY;
|
||||
|
||||
t->expire = tick_first(tick_first(s->req->rex, s->req->wex),
|
||||
tick_first(s->rep->rex, s->rep->wex));
|
||||
if (s->req->analysers)
|
||||
t->expire = tick_first(t->expire, s->req->analyse_exp);
|
||||
|
||||
if (s->si[0].exp)
|
||||
t->expire = tick_first(t->expire, s->si[0].exp);
|
||||
|
||||
if (s->si[1].exp)
|
||||
t->expire = tick_first(t->expire, s->si[1].exp);
|
||||
|
||||
#ifdef DEBUG_FULL
|
||||
fprintf(stderr, "[%u] queuing with exp=%u req->rex=%u req->wex=%u req->ana_exp=%u rep->rex=%u rep->wex=%u, cs=%d, ss=%d\n",
|
||||
now_ms, t->expire, s->req->rex, s->req->wex, s->req->analyse_exp, s->rep->rex, s->rep->wex, s->si[0].state, s->si[1].state);
|
||||
#endif
|
||||
/* restore t to its place in the task list */
|
||||
task_queue(t);
|
||||
|
||||
#ifdef DEBUG_DEV
|
||||
/* this may only happen when no timeout is set or in case of an FSM bug */
|
||||
if (!t->expire)
|
||||
ABORT_NOW();
|
||||
#endif
|
||||
*next = t->expire;
|
||||
return; /* nothing more to do */
|
||||
}
|
||||
|
||||
s->fe->feconn--;
|
||||
if (s->flags & SN_BE_ASSIGNED)
|
||||
s->be->beconn--;
|
||||
actconn--;
|
||||
|
||||
if (unlikely((global.mode & MODE_DEBUG) &&
|
||||
(!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
|
||||
int len;
|
||||
len = sprintf(trash, "%08x:%s.closed[%04x:%04x] (term_trace=0x%08x)\n",
|
||||
s->uniq_id, s->be->id,
|
||||
(unsigned short)s->req->prod->fd, (unsigned short)s->req->cons->fd,
|
||||
s->term_trace);
|
||||
write(1, trash, len);
|
||||
}
|
||||
|
||||
s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
|
||||
session_process_counters(s);
|
||||
|
||||
/* let's do a final log if we need it */
|
||||
if (s->logs.logwait &&
|
||||
!(s->flags & SN_MONITOR) &&
|
||||
(!(s->fe->options & PR_O_NULLNOLOG) || s->req->total)) {
|
||||
if (s->fe->to_log & LW_REQ)
|
||||
http_sess_log(s);
|
||||
else
|
||||
tcp_sess_log(s);
|
||||
}
|
||||
|
||||
/* the task MUST not be in the run queue anymore */
|
||||
task_delete(t);
|
||||
session_free(s);
|
||||
task_free(t);
|
||||
*next = TICK_ETERNITY;
|
||||
}
|
||||
|
||||
/*
|
||||
* This function adjusts sess->srv_conn and maintains the previous and new
|
||||
* server's served session counts. Setting newsrv to NULL is enough to release
|
||||
|
Loading…
Reference in New Issue
Block a user