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haproxy/src/log.c
Christopher Faulet 28ac099907 MINOR: log: Keep the ref when a log server is copied to avoid duplicate entries 
With "log global" line, the global list of loggers are copied into the proxy's
struct. The list coming from the default section is also copied when a frontend
or a backend section is parsed. So it is possible to have duplicate entries in
the proxy's list. For instance, with this following config, all messages will be
logged twice:

    global
        log 127.0.0.1 local0 debug
        daemon

    defaults
        mode   http
        log    global
        option httplog

    frontend front-http
        log global
        bind *:8888
        default_backend back-http

    backend back-http
        server www 127.0.0.1:8000
2018-04-05 15:13:54 +02:00

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/*
* General logging functions.
*
* Copyright 2000-2008 Willy Tarreau <w@1wt.eu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <ctype.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <common/config.h>
#include <common/compat.h>
#include <common/standard.h>
#include <common/time.h>
#include <types/cli.h>
#include <types/global.h>
#include <types/log.h>
#include <proto/applet.h>
#include <proto/cli.h>
#include <proto/frontend.h>
#include <proto/proto_http.h>
#include <proto/log.h>
#include <proto/sample.h>
#include <proto/stream.h>
#include <proto/stream_interface.h>
#ifdef USE_OPENSSL
#include <proto/ssl_sock.h>
#endif
struct log_fmt {
char *name;
struct {
struct chunk sep1; /* first pid separator */
struct chunk sep2; /* second pid separator */
} pid;
};
static const struct log_fmt log_formats[LOG_FORMATS] = {
[LOG_FORMAT_RFC3164] = {
.name = "rfc3164",
.pid = {
.sep1 = { .str = "[", .len = 1 },
.sep2 = { .str = "]: ", .len = 3 }
}
},
[LOG_FORMAT_RFC5424] = {
.name = "rfc5424",
.pid = {
.sep1 = { .str = " ", .len = 1 },
.sep2 = { .str = " - ", .len = 3 }
}
}
};
#define FD_SETS_ARE_BITFIELDS
#ifdef FD_SETS_ARE_BITFIELDS
/*
* This map is used with all the FD_* macros to check whether a particular bit
* is set or not. Each bit represents an ACSII code. FD_SET() sets those bytes
* which should be escaped. When FD_ISSET() returns non-zero, it means that the
* byte should be escaped. Be careful to always pass bytes from 0 to 255
* exclusively to the macros.
*/
fd_set rfc5424_escape_map[(sizeof(fd_set) > (256/8)) ? 1 : ((256/8) / sizeof(fd_set))];
#else
#error "Check if your OS uses bitfields for fd_sets"
#endif
const char *log_facilities[NB_LOG_FACILITIES] = {
"kern", "user", "mail", "daemon",
"auth", "syslog", "lpr", "news",
"uucp", "cron", "auth2", "ftp",
"ntp", "audit", "alert", "cron2",
"local0", "local1", "local2", "local3",
"local4", "local5", "local6", "local7"
};
const char *log_levels[NB_LOG_LEVELS] = {
"emerg", "alert", "crit", "err",
"warning", "notice", "info", "debug"
};
const char sess_term_cond[16] = "-LcCsSPRIDKUIIII"; /* normal, Local, CliTo, CliErr, SrvTo, SrvErr, PxErr, Resource, Internal, Down, Killed, Up, -- */
const char sess_fin_state[8] = "-RCHDLQT"; /* cliRequest, srvConnect, srvHeader, Data, Last, Queue, Tarpit */
/* log_format */
struct logformat_type {
char *name;
int type;
int mode;
int lw; /* logwait bitsfield */
int (*config_callback)(struct logformat_node *node, struct proxy *curproxy);
const char *replace_by; /* new option to use instead of old one */
};
int prepare_addrsource(struct logformat_node *node, struct proxy *curproxy);
/* log_format variable names */
static const struct logformat_type logformat_keywords[] = {
{ "o", LOG_FMT_GLOBAL, PR_MODE_TCP, 0, NULL }, /* global option */
/* please keep these lines sorted ! */
{ "B", LOG_FMT_BYTES, PR_MODE_TCP, LW_BYTES, NULL }, /* bytes from server to client */
{ "CC", LOG_FMT_CCLIENT, PR_MODE_HTTP, LW_REQHDR, NULL }, /* client cookie */
{ "CS", LOG_FMT_CSERVER, PR_MODE_HTTP, LW_RSPHDR, NULL }, /* server cookie */
{ "H", LOG_FMT_HOSTNAME, PR_MODE_TCP, LW_INIT, NULL }, /* Hostname */
{ "ID", LOG_FMT_UNIQUEID, PR_MODE_HTTP, LW_BYTES, NULL }, /* Unique ID */
{ "ST", LOG_FMT_STATUS, PR_MODE_TCP, LW_RESP, NULL }, /* status code */
{ "T", LOG_FMT_DATEGMT, PR_MODE_TCP, LW_INIT, NULL }, /* date GMT */
{ "Ta", LOG_FMT_Ta, PR_MODE_HTTP, LW_BYTES, NULL }, /* Time active (tr to end) */
{ "Tc", LOG_FMT_TC, PR_MODE_TCP, LW_BYTES, NULL }, /* Tc */
{ "Th", LOG_FMT_Th, PR_MODE_TCP, LW_BYTES, NULL }, /* Time handshake */
{ "Ti", LOG_FMT_Ti, PR_MODE_HTTP, LW_BYTES, NULL }, /* Time idle */
{ "Tl", LOG_FMT_DATELOCAL, PR_MODE_TCP, LW_INIT, NULL }, /* date local timezone */
{ "Tq", LOG_FMT_TQ, PR_MODE_HTTP, LW_BYTES, NULL }, /* Tq=Th+Ti+TR */
{ "Tr", LOG_FMT_Tr, PR_MODE_HTTP, LW_BYTES, NULL }, /* Tr */
{ "TR", LOG_FMT_TR, PR_MODE_HTTP, LW_BYTES, NULL }, /* Time to receive a valid request */
{ "Td", LOG_FMT_TD, PR_MODE_TCP, LW_BYTES, NULL }, /* Td = Tt - (Tq + Tw + Tc + Tr) */
{ "Ts", LOG_FMT_TS, PR_MODE_TCP, LW_INIT, NULL }, /* timestamp GMT */
{ "Tt", LOG_FMT_TT, PR_MODE_TCP, LW_BYTES, NULL }, /* Tt */
{ "Tw", LOG_FMT_TW, PR_MODE_TCP, LW_BYTES, NULL }, /* Tw */
{ "U", LOG_FMT_BYTES_UP, PR_MODE_TCP, LW_BYTES, NULL }, /* bytes from client to server */
{ "ac", LOG_FMT_ACTCONN, PR_MODE_TCP, LW_BYTES, NULL }, /* actconn */
{ "b", LOG_FMT_BACKEND, PR_MODE_TCP, LW_INIT, NULL }, /* backend */
{ "bc", LOG_FMT_BECONN, PR_MODE_TCP, LW_BYTES, NULL }, /* beconn */
{ "bi", LOG_FMT_BACKENDIP, PR_MODE_TCP, LW_BCKIP, prepare_addrsource }, /* backend source ip */
{ "bp", LOG_FMT_BACKENDPORT, PR_MODE_TCP, LW_BCKIP, prepare_addrsource }, /* backend source port */
{ "bq", LOG_FMT_BCKQUEUE, PR_MODE_TCP, LW_BYTES, NULL }, /* backend_queue */
{ "ci", LOG_FMT_CLIENTIP, PR_MODE_TCP, LW_CLIP | LW_XPRT, NULL }, /* client ip */
{ "cp", LOG_FMT_CLIENTPORT, PR_MODE_TCP, LW_CLIP | LW_XPRT, NULL }, /* client port */
{ "f", LOG_FMT_FRONTEND, PR_MODE_TCP, LW_INIT, NULL }, /* frontend */
{ "fc", LOG_FMT_FECONN, PR_MODE_TCP, LW_BYTES, NULL }, /* feconn */
{ "fi", LOG_FMT_FRONTENDIP, PR_MODE_TCP, LW_FRTIP | LW_XPRT, NULL }, /* frontend ip */
{ "fp", LOG_FMT_FRONTENDPORT, PR_MODE_TCP, LW_FRTIP | LW_XPRT, NULL }, /* frontend port */
{ "ft", LOG_FMT_FRONTEND_XPRT, PR_MODE_TCP, LW_INIT, NULL }, /* frontend with transport mode */
{ "hr", LOG_FMT_HDRREQUEST, PR_MODE_TCP, LW_REQHDR, NULL }, /* header request */
{ "hrl", LOG_FMT_HDRREQUESTLIST, PR_MODE_TCP, LW_REQHDR, NULL }, /* header request list */
{ "hs", LOG_FMT_HDRRESPONS, PR_MODE_TCP, LW_RSPHDR, NULL }, /* header response */
{ "hsl", LOG_FMT_HDRRESPONSLIST, PR_MODE_TCP, LW_RSPHDR, NULL }, /* header response list */
{ "HM", LOG_FMT_HTTP_METHOD, PR_MODE_HTTP, LW_REQ, NULL }, /* HTTP method */
{ "HP", LOG_FMT_HTTP_PATH, PR_MODE_HTTP, LW_REQ, NULL }, /* HTTP path */
{ "HQ", LOG_FMT_HTTP_QUERY, PR_MODE_HTTP, LW_REQ, NULL }, /* HTTP query */
{ "HU", LOG_FMT_HTTP_URI, PR_MODE_HTTP, LW_REQ, NULL }, /* HTTP full URI */
{ "HV", LOG_FMT_HTTP_VERSION, PR_MODE_HTTP, LW_REQ, NULL }, /* HTTP version */
{ "lc", LOG_FMT_LOGCNT, PR_MODE_TCP, LW_INIT, NULL }, /* log counter */
{ "ms", LOG_FMT_MS, PR_MODE_TCP, LW_INIT, NULL }, /* accept date millisecond */
{ "pid", LOG_FMT_PID, PR_MODE_TCP, LW_INIT, NULL }, /* log pid */
{ "r", LOG_FMT_REQ, PR_MODE_HTTP, LW_REQ, NULL }, /* request */
{ "rc", LOG_FMT_RETRIES, PR_MODE_TCP, LW_BYTES, NULL }, /* retries */
{ "rt", LOG_FMT_COUNTER, PR_MODE_TCP, LW_REQ, NULL }, /* request counter (HTTP or TCP session) */
{ "s", LOG_FMT_SERVER, PR_MODE_TCP, LW_SVID, NULL }, /* server */
{ "sc", LOG_FMT_SRVCONN, PR_MODE_TCP, LW_BYTES, NULL }, /* srv_conn */
{ "si", LOG_FMT_SERVERIP, PR_MODE_TCP, LW_SVIP, NULL }, /* server destination ip */
{ "sp", LOG_FMT_SERVERPORT, PR_MODE_TCP, LW_SVIP, NULL }, /* server destination port */
{ "sq", LOG_FMT_SRVQUEUE, PR_MODE_TCP, LW_BYTES, NULL }, /* srv_queue */
{ "sslc", LOG_FMT_SSL_CIPHER, PR_MODE_TCP, LW_XPRT, NULL }, /* client-side SSL ciphers */
{ "sslv", LOG_FMT_SSL_VERSION, PR_MODE_TCP, LW_XPRT, NULL }, /* client-side SSL protocol version */
{ "t", LOG_FMT_DATE, PR_MODE_TCP, LW_INIT, NULL }, /* date */
{ "tr", LOG_FMT_tr, PR_MODE_HTTP, LW_INIT, NULL }, /* date of start of request */
{ "trg",LOG_FMT_trg, PR_MODE_HTTP, LW_INIT, NULL }, /* date of start of request, GMT */
{ "trl",LOG_FMT_trl, PR_MODE_HTTP, LW_INIT, NULL }, /* date of start of request, local */
{ "ts", LOG_FMT_TERMSTATE, PR_MODE_TCP, LW_BYTES, NULL },/* termination state */
{ "tsc", LOG_FMT_TERMSTATE_CK, PR_MODE_TCP, LW_INIT, NULL },/* termination state */
/* The following tags are deprecated and will be removed soon */
{ "Bi", LOG_FMT_BACKENDIP, PR_MODE_TCP, LW_BCKIP, prepare_addrsource, "bi" }, /* backend source ip */
{ "Bp", LOG_FMT_BACKENDPORT, PR_MODE_TCP, LW_BCKIP, prepare_addrsource, "bp" }, /* backend source port */
{ "Ci", LOG_FMT_CLIENTIP, PR_MODE_TCP, LW_CLIP | LW_XPRT, NULL, "ci" }, /* client ip */
{ "Cp", LOG_FMT_CLIENTPORT, PR_MODE_TCP, LW_CLIP | LW_XPRT, NULL, "cp" }, /* client port */
{ "Fi", LOG_FMT_FRONTENDIP, PR_MODE_TCP, LW_FRTIP | LW_XPRT, NULL, "fi" }, /* frontend ip */
{ "Fp", LOG_FMT_FRONTENDPORT, PR_MODE_TCP, LW_FRTIP | LW_XPRT, NULL, "fp" }, /* frontend port */
{ "Si", LOG_FMT_SERVERIP, PR_MODE_TCP, LW_SVIP, NULL, "si" }, /* server destination ip */
{ "Sp", LOG_FMT_SERVERPORT, PR_MODE_TCP, LW_SVIP, NULL, "sp" }, /* server destination port */
{ "cc", LOG_FMT_CCLIENT, PR_MODE_HTTP, LW_REQHDR, NULL, "CC" }, /* client cookie */
{ "cs", LOG_FMT_CSERVER, PR_MODE_HTTP, LW_RSPHDR, NULL, "CS" }, /* server cookie */
{ "st", LOG_FMT_STATUS, PR_MODE_HTTP, LW_RESP, NULL, "ST" }, /* status code */
{ 0, 0, 0, 0, NULL }
};
char default_http_log_format[] = "%ci:%cp [%tr] %ft %b/%s %TR/%Tw/%Tc/%Tr/%Ta %ST %B %CC %CS %tsc %ac/%fc/%bc/%sc/%rc %sq/%bq %hr %hs %{+Q}r"; // default format
char clf_http_log_format[] = "%{+Q}o %{-Q}ci - - [%trg] %r %ST %B \"\" \"\" %cp %ms %ft %b %s %TR %Tw %Tc %Tr %Ta %tsc %ac %fc %bc %sc %rc %sq %bq %CC %CS %hrl %hsl";
char default_tcp_log_format[] = "%ci:%cp [%t] %ft %b/%s %Tw/%Tc/%Tt %B %ts %ac/%fc/%bc/%sc/%rc %sq/%bq";
char *log_format = NULL;
/* Default string used for structured-data part in RFC5424 formatted
* syslog messages.
*/
char default_rfc5424_sd_log_format[] = "- ";
/* This is a global syslog header, common to all outgoing messages in
* RFC3164 format. It begins with time-based part and is updated by
* update_log_hdr().
*/
THREAD_LOCAL char *logheader = NULL;
/* This is a global syslog header for messages in RFC5424 format. It is
* updated by update_log_hdr_rfc5424().
*/
THREAD_LOCAL char *logheader_rfc5424 = NULL;
/* This is a global syslog message buffer, common to all outgoing
* messages. It contains only the data part.
*/
THREAD_LOCAL char *logline = NULL;
/* A global syslog message buffer, common to all RFC5424 syslog messages.
* Currently, it is used for generating the structured-data part.
*/
THREAD_LOCAL char *logline_rfc5424 = NULL;
/* A global buffer used to store all startup alerts/warnings. It will then be
* retrieve on the CLI. */
static THREAD_LOCAL char *startup_logs = NULL;
struct logformat_var_args {
char *name;
int mask;
};
struct logformat_var_args var_args_list[] = {
// global
{ "M", LOG_OPT_MANDATORY },
{ "Q", LOG_OPT_QUOTE },
{ "X", LOG_OPT_HEXA },
{ "E", LOG_OPT_ESC },
{ 0, 0 }
};
/* return the name of the directive used in the current proxy for which we're
* currently parsing a header, when it is known.
*/
static inline const char *fmt_directive(const struct proxy *curproxy)
{
switch (curproxy->conf.args.ctx) {
case ARGC_ACL:
return "acl";
case ARGC_STK:
return "stick";
case ARGC_TRK:
return "track-sc";
case ARGC_LOG:
return "log-format";
case ARGC_LOGSD:
return "log-format-sd";
case ARGC_HRQ:
return "http-request";
case ARGC_HRS:
return "http-response";
case ARGC_UIF:
return "unique-id-format";
case ARGC_RDR:
return "redirect";
case ARGC_CAP:
return "capture";
case ARGC_SRV:
return "server";
case ARGC_SPOE:
return "spoe-message";
case ARGC_UBK:
return "use_backend";
default:
return "undefined(please report this bug)"; /* must never happen */
}
}
/*
* callback used to configure addr source retrieval
*/
int prepare_addrsource(struct logformat_node *node, struct proxy *curproxy)
{
curproxy->options2 |= PR_O2_SRC_ADDR;
return 0;
}
/*
* Parse args in a logformat_var. Returns 0 in error
* case, otherwise, it returns 1.
*/
int parse_logformat_var_args(char *args, struct logformat_node *node, char **err)
{
int i = 0;
int end = 0;
int flags = 0; // 1 = + 2 = -
char *sp = NULL; // start pointer
if (args == NULL) {
memprintf(err, "internal error: parse_logformat_var_args() expects non null 'args'");
return 0;
}
while (1) {
if (*args == '\0')
end = 1;
if (*args == '+') {
// add flag
sp = args + 1;
flags = 1;
}
if (*args == '-') {
// delete flag
sp = args + 1;
flags = 2;
}
if (*args == '\0' || *args == ',') {
*args = '\0';
for (i = 0; sp && var_args_list[i].name; i++) {
if (strcmp(sp, var_args_list[i].name) == 0) {
if (flags == 1) {
node->options |= var_args_list[i].mask;
break;
} else if (flags == 2) {
node->options &= ~var_args_list[i].mask;
break;
}
}
}
sp = NULL;
if (end)
break;
}
args++;
}
return 1;
}
/*
* Parse a variable '%varname' or '%{args}varname' in log-format. The caller
* must pass the args part in the <arg> pointer with its length in <arg_len>,
* and varname with its length in <var> and <var_len> respectively. <arg> is
* ignored when arg_len is 0. Neither <var> nor <var_len> may be null.
* Returns false in error case and err is filled, otherwise returns true.
*/
int parse_logformat_var(char *arg, int arg_len, char *var, int var_len, struct proxy *curproxy, struct list *list_format, int *defoptions, char **err)
{
int j;
struct logformat_node *node;
for (j = 0; logformat_keywords[j].name; j++) { // search a log type
if (strlen(logformat_keywords[j].name) == var_len &&
strncmp(var, logformat_keywords[j].name, var_len) == 0) {
if (logformat_keywords[j].mode != PR_MODE_HTTP || curproxy->mode == PR_MODE_HTTP) {
node = calloc(1, sizeof(*node));
if (!node) {
memprintf(err, "out of memory error");
return 0;
}
node->type = logformat_keywords[j].type;
node->options = *defoptions;
if (arg_len) {
node->arg = my_strndup(arg, arg_len);
if (!parse_logformat_var_args(node->arg, node, err))
return 0;
}
if (node->type == LOG_FMT_GLOBAL) {
*defoptions = node->options;
free(node->arg);
free(node);
} else {
if (logformat_keywords[j].config_callback &&
logformat_keywords[j].config_callback(node, curproxy) != 0) {
return 0;
}
curproxy->to_log |= logformat_keywords[j].lw;
LIST_ADDQ(list_format, &node->list);
}
if (logformat_keywords[j].replace_by)
ha_warning("parsing [%s:%d] : deprecated variable '%s' in '%s', please replace it with '%s'.\n",
curproxy->conf.args.file, curproxy->conf.args.line,
logformat_keywords[j].name, fmt_directive(curproxy), logformat_keywords[j].replace_by);
return 1;
} else {
memprintf(err, "format variable '%s' is reserved for HTTP mode",
logformat_keywords[j].name);
return 0;
}
}
}
j = var[var_len];
var[var_len] = 0;
memprintf(err, "no such format variable '%s'. If you wanted to emit the '%%' character verbatim, you need to use '%%%%'", var);
var[var_len] = j;
return 0;
}
/*
* push to the logformat linked list
*
* start: start pointer
* end: end text pointer
* type: string type
* list_format: destination list
*
* LOG_TEXT: copy chars from start to end excluding end.
*
*/
int add_to_logformat_list(char *start, char *end, int type, struct list *list_format, char **err)
{
char *str;
if (type == LF_TEXT) { /* type text */
struct logformat_node *node = calloc(1, sizeof(*node));
if (!node) {
memprintf(err, "out of memory error");
return 0;
}
str = calloc(1, end - start + 1);
strncpy(str, start, end - start);
str[end - start] = '\0';
node->arg = str;
node->type = LOG_FMT_TEXT; // type string
LIST_ADDQ(list_format, &node->list);
} else if (type == LF_SEPARATOR) {
struct logformat_node *node = calloc(1, sizeof(*node));
if (!node) {
memprintf(err, "out of memory error");
return 0;
}
node->type = LOG_FMT_SEPARATOR;
LIST_ADDQ(list_format, &node->list);
}
return 1;
}
/*
* Parse the sample fetch expression <text> and add a node to <list_format> upon
* success. At the moment, sample converters are not yet supported but fetch arguments
* should work. The curpx->conf.args.ctx must be set by the caller.
*
* In error case, the function returns 0, otherwise it returns 1.
*/
int add_sample_to_logformat_list(char *text, char *arg, int arg_len, struct proxy *curpx, struct list *list_format, int options, int cap, char **err)
{
char *cmd[2];
struct sample_expr *expr;
struct logformat_node *node;
int cmd_arg;
cmd[0] = text;
cmd[1] = "";
cmd_arg = 0;
expr = sample_parse_expr(cmd, &cmd_arg, curpx->conf.args.file, curpx->conf.args.line, err, &curpx->conf.args);
if (!expr) {
memprintf(err, "failed to parse sample expression <%s> : %s", text, *err);
return 0;
}
node = calloc(1, sizeof(*node));
if (!node) {
memprintf(err, "out of memory error");
return 0;
}
node->type = LOG_FMT_EXPR;
node->expr = expr;
node->options = options;
if (arg_len) {
node->arg = my_strndup(arg, arg_len);
if (!parse_logformat_var_args(node->arg, node, err))
return 0;
}
if (expr->fetch->val & cap & SMP_VAL_REQUEST)
node->options |= LOG_OPT_REQ_CAP; /* fetch method is request-compatible */
if (expr->fetch->val & cap & SMP_VAL_RESPONSE)
node->options |= LOG_OPT_RES_CAP; /* fetch method is response-compatible */
if (!(expr->fetch->val & cap)) {
free(node);
node = NULL;
memprintf(err, "sample fetch <%s> may not be reliably used here because it needs '%s' which is not available here",
text, sample_src_names(expr->fetch->use));
return 0;
}
/* check if we need to allocate an hdr_idx struct for HTTP parsing */
/* Note, we may also need to set curpx->to_log with certain fetches */
curpx->http_needed |= !!(expr->fetch->use & SMP_USE_HTTP_ANY);
/* FIXME: temporary workaround for missing LW_XPRT and LW_REQ flags
* needed with some sample fetches (eg: ssl*). We always set it for
* now on, but this will leave with sample capabilities soon.
*/
curpx->to_log |= LW_XPRT;
curpx->to_log |= LW_REQ;
LIST_ADDQ(list_format, &node->list);
return 1;
}
/*
* Parse the log_format string and fill a linked list.
* Variable name are preceded by % and composed by characters [a-zA-Z0-9]* : %varname
* You can set arguments using { } : %{many arguments}varname.
* The curproxy->conf.args.ctx must be set by the caller.
*
* str: the string to parse
* curproxy: the proxy affected
* list_format: the destination list
* options: LOG_OPT_* to force on every node
* cap: all SMP_VAL_* flags supported by the consumer
*
* The function returns 1 in success case, otherwise, it returns 0 and err is filled.
*/
int parse_logformat_string(const char *fmt, struct proxy *curproxy, struct list *list_format, int options, int cap, char **err)
{
char *sp, *str, *backfmt; /* start pointer for text parts */
char *arg = NULL; /* start pointer for args */
char *var = NULL; /* start pointer for vars */
int arg_len = 0;
int var_len = 0;
int cformat; /* current token format */
int pformat; /* previous token format */
struct logformat_node *tmplf, *back;
sp = str = backfmt = strdup(fmt);
if (!str) {
memprintf(err, "out of memory error");
return 0;
}
curproxy->to_log |= LW_INIT;
/* flush the list first. */
list_for_each_entry_safe(tmplf, back, list_format, list) {
LIST_DEL(&tmplf->list);
free(tmplf);
}
for (cformat = LF_INIT; cformat != LF_END; str++) {
pformat = cformat;
if (!*str)
cformat = LF_END; // preset it to save all states from doing this
/* The prinicple of the two-step state machine below is to first detect a change, and
* second have all common paths processed at one place. The common paths are the ones
* encountered in text areas (LF_INIT, LF_TEXT, LF_SEPARATOR) and at the end (LF_END).
* We use the common LF_INIT state to dispatch to the different final states.
*/
switch (pformat) {
case LF_STARTVAR: // text immediately following a '%'
arg = NULL; var = NULL;
arg_len = var_len = 0;
if (*str == '{') { // optional argument
cformat = LF_STARG;
arg = str + 1;
}
else if (*str == '[') {
cformat = LF_STEXPR;
var = str + 1; // store expr in variable name
}
else if (isalpha((unsigned char)*str)) { // variable name
cformat = LF_VAR;
var = str;
}
else if (*str == '%')
cformat = LF_TEXT; // convert this character to a litteral (useful for '%')
else if (isdigit((unsigned char)*str) || *str == ' ' || *str == '\t') {
/* single '%' followed by blank or digit, send them both */
cformat = LF_TEXT;
pformat = LF_TEXT; /* finally we include the previous char as well */
sp = str - 1; /* send both the '%' and the current char */
memprintf(err, "unexpected variable name near '%c' at position %d line : '%s'. Maybe you want to write a single '%%', use the syntax '%%%%'",
*str, (int)(str - backfmt), fmt);
return 0;
}
else
cformat = LF_INIT; // handle other cases of litterals
break;
case LF_STARG: // text immediately following '%{'
if (*str == '}') { // end of arg
cformat = LF_EDARG;
arg_len = str - arg;
*str = 0; // used for reporting errors
}
break;
case LF_EDARG: // text immediately following '%{arg}'
if (*str == '[') {
cformat = LF_STEXPR;
var = str + 1; // store expr in variable name
break;
}
else if (isalnum((unsigned char)*str)) { // variable name
cformat = LF_VAR;
var = str;
break;
}
memprintf(err, "parse argument modifier without variable name near '%%{%s}'", arg);
return 0;
case LF_STEXPR: // text immediately following '%['
if (*str == ']') { // end of arg
cformat = LF_EDEXPR;
var_len = str - var;
*str = 0; // needed for parsing the expression
}
break;
case LF_VAR: // text part of a variable name
var_len = str - var;
if (!isalnum((unsigned char)*str))
cformat = LF_INIT; // not variable name anymore
break;
default: // LF_INIT, LF_TEXT, LF_SEPARATOR, LF_END, LF_EDEXPR
cformat = LF_INIT;
}
if (cformat == LF_INIT) { /* resynchronize state to text/sep/startvar */
switch (*str) {
case '%': cformat = LF_STARTVAR; break;
case ' ': cformat = LF_SEPARATOR; break;
case 0 : cformat = LF_END; break;
default : cformat = LF_TEXT; break;
}
}
if (cformat != pformat || pformat == LF_SEPARATOR) {
switch (pformat) {
case LF_VAR:
if (!parse_logformat_var(arg, arg_len, var, var_len, curproxy, list_format, &options, err))
return 0;
break;
case LF_STEXPR:
if (!add_sample_to_logformat_list(var, arg, arg_len, curproxy, list_format, options, cap, err))
return 0;
break;
case LF_TEXT:
case LF_SEPARATOR:
if (!add_to_logformat_list(sp, str, pformat, list_format, err))
return 0;
break;
}
sp = str; /* new start of text at every state switch and at every separator */
}
}
if (pformat == LF_STARTVAR || pformat == LF_STARG || pformat == LF_STEXPR) {
memprintf(err, "truncated line after '%s'", var ? var : arg ? arg : "%");
return 0;
}
free(backfmt);
return 1;
}
/*
* Parse "log" keyword and update <logsrvs> list accordingly.
*
* When <do_del> is set, it means the "no log" line was parsed, so all log
* servers in <logsrvs> are released.
*
* Otherwise, we try to parse the "log" line. First of all, when the list is not
* the global one, we look for the parameter "global". If we find it,
* global.logsrvs is copied. Else we parse each arguments.
*
* The function returns 1 in success case, otherwise, it returns 0 and err is
* filled.
*/
int parse_logsrv(char **args, struct list *logsrvs, int do_del, char **err)
{
struct sockaddr_storage *sk;
struct logsrv *logsrv = NULL;
int port1, port2;
int cur_arg;
/*
* "no log": delete previous herited or defined syslog
* servers.
*/
if (do_del) {
struct logsrv *back;
if (*(args[1]) != 0) {
memprintf(err, "'no log' does not expect arguments");
goto error;
}
list_for_each_entry_safe(logsrv, back, logsrvs, list) {
LIST_DEL(&logsrv->list);
free(logsrv);
}
return 1;
}
/*
* "log global": copy global.logrsvs linked list to the end of logsrvs
* list. But first, we check (logsrvs != global.logsrvs).
*/
if (*(args[1]) && *(args[2]) == 0 && !strcmp(args[1], "global")) {
if (logsrvs == &global.logsrvs) {
memprintf(err, "'global' is not supported for a global syslog server");
goto error;
}
list_for_each_entry(logsrv, &global.logsrvs, list) {
struct logsrv *node;
list_for_each_entry(node, logsrvs, list) {
if (node->ref == logsrv)
goto skip_logsrv;
}
node = malloc(sizeof(*node));
memcpy(node, logsrv, sizeof(struct logsrv));
node->ref = logsrv;
LIST_INIT(&node->list);
LIST_ADDQ(logsrvs, &node->list);
skip_logsrv:
continue;
}
return 1;
}
/*
* "log <address> ...: parse a syslog server line
*/
if (*(args[1]) == 0 || *(args[2]) == 0) {
memprintf(err, "expects <address> and <facility> %s as arguments",
((logsrvs == &global.logsrvs) ? "" : "or global"));
goto error;
}
logsrv = calloc(1, sizeof(*logsrv));
if (!logsrv) {
memprintf(err, "out of memory");
goto error;
}
/* skip address for now, it will be parsed at the end */
cur_arg = 2;
/* just after the address, a length may be specified */
logsrv->maxlen = MAX_SYSLOG_LEN;
if (strcmp(args[cur_arg], "len") == 0) {
int len = atoi(args[cur_arg+1]);
if (len < 80 || len > 65535) {
memprintf(err, "invalid log length '%s', must be between 80 and 65535",
args[cur_arg+1]);
goto error;
}
logsrv->maxlen = len;
cur_arg += 2;
}
if (logsrv->maxlen > global.max_syslog_len)
global.max_syslog_len = logsrv->maxlen;
/* after the length, a format may be specified */
if (strcmp(args[cur_arg], "format") == 0) {
logsrv->format = get_log_format(args[cur_arg+1]);
if (logsrv->format < 0) {
memprintf(err, "unknown log format '%s'", args[cur_arg+1]);
goto error;
}
cur_arg += 2;
}
/* parse the facility */
logsrv->facility = get_log_facility(args[cur_arg]);
if (logsrv->facility < 0) {
memprintf(err, "unknown log facility '%s'", args[cur_arg]);
goto error;
}
cur_arg++;
/* parse the max syslog level (default: debug) */
logsrv->level = 7;
if (*(args[cur_arg])) {
logsrv->level = get_log_level(args[cur_arg]);
if (logsrv->level < 0) {
memprintf(err, "unknown optional log level '%s'", args[cur_arg]);
goto error;
}
cur_arg++;
}
/* parse the limit syslog level (default: emerg) */
logsrv->minlvl = 0;
if (*(args[cur_arg])) {
logsrv->minlvl = get_log_level(args[cur_arg]);
if (logsrv->minlvl < 0) {
memprintf(err, "unknown optional minimum log level '%s'", args[cur_arg]);
goto error;
}
cur_arg++;
}
/* Too many args */
if (*(args[cur_arg])) {
memprintf(err, "cannot handle unexpected argument '%s'", args[cur_arg]);
goto error;
}
/* now, back to the address */
sk = str2sa_range(args[1], NULL, &port1, &port2, err, NULL, NULL, 1);
if (!sk)
goto error;
logsrv->addr = *sk;
if (sk->ss_family == AF_INET || sk->ss_family == AF_INET6) {
if (port1 != port2) {
memprintf(err, "port ranges and offsets are not allowed in '%s'", args[1]);
goto error;
}
logsrv->addr = *sk;
if (!port1)
set_host_port(&logsrv->addr, SYSLOG_PORT);
}
LIST_ADDQ(logsrvs, &logsrv->list);
return 1;
error:
free(logsrv);
return 0;
}
/* Generic function to display messages prefixed by a label */
static void print_message(const char *label, const char *fmt, va_list argp)
{
struct tm tm;
char *head, *msg;
head = msg = NULL;
get_localtime(date.tv_sec, &tm);
memprintf(&head, "[%s] %03d/%02d%02d%02d (%d) : ",
label, tm.tm_yday, tm.tm_hour, tm.tm_min, tm.tm_sec, (int)getpid());
memvprintf(&msg, fmt, argp);
if (global.mode & MODE_STARTING)
memprintf(&startup_logs, "%s%s%s", (startup_logs ? startup_logs : ""), head, msg);
fprintf(stderr, "%s%s", head, msg);
fflush(stderr);
free(head);
free(msg);
}
/*
* Displays the message on stderr with the date and pid. Overrides the quiet
* mode during startup.
*/
void ha_alert(const char *fmt, ...)
{
va_list argp;
if (!(global.mode & MODE_QUIET) || (global.mode & (MODE_VERBOSE | MODE_STARTING))) {
va_start(argp, fmt);
print_message("ALERT", fmt, argp);
va_end(argp);
}
}
/*
* Displays the message on stderr with the date and pid.
*/
void ha_warning(const char *fmt, ...)
{
va_list argp;
if (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) {
va_start(argp, fmt);
print_message("WARNING", fmt, argp);
va_end(argp);
}
}
/*
* Displays the message on <out> only if quiet mode is not set.
*/
void qfprintf(FILE *out, const char *fmt, ...)
{
va_list argp;
if (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) {
va_start(argp, fmt);
vfprintf(out, fmt, argp);
fflush(out);
va_end(argp);
}
}
/*
* returns log format for <fmt> or -1 if not found.
*/
int get_log_format(const char *fmt)
{
int format;
format = LOG_FORMATS - 1;
while (format >= 0 && strcmp(log_formats[format].name, fmt))
format--;
return format;
}
/*
* returns log level for <lev> or -1 if not found.
*/
int get_log_level(const char *lev)
{
int level;
level = NB_LOG_LEVELS - 1;
while (level >= 0 && strcmp(log_levels[level], lev))
level--;
return level;
}
/*
* returns log facility for <fac> or -1 if not found.
*/
int get_log_facility(const char *fac)
{
int facility;
facility = NB_LOG_FACILITIES - 1;
while (facility >= 0 && strcmp(log_facilities[facility], fac))
facility--;
return facility;
}
/*
* Encode the string.
*
* When using the +E log format option, it will try to escape '"\]'
* characters with '\' as prefix. The same prefix should not be used as
* <escape>.
*/
static char *lf_encode_string(char *start, char *stop,
const char escape, const fd_set *map,
const char *string,
struct logformat_node *node)
{
if (node->options & LOG_OPT_ESC) {
if (start < stop) {
stop--; /* reserve one byte for the final '\0' */
while (start < stop && *string != '\0') {
if (!FD_ISSET((unsigned char)(*string), map)) {
if (!FD_ISSET((unsigned char)(*string), rfc5424_escape_map))
*start++ = *string;
else {
if (start + 2 >= stop)
break;
*start++ = '\\';
*start++ = *string;
}
}
else {
if (start + 3 >= stop)
break;
*start++ = escape;
*start++ = hextab[(*string >> 4) & 15];
*start++ = hextab[*string & 15];
}
string++;
}
*start = '\0';
}
}
else {
return encode_string(start, stop, escape, map, string);
}
return start;
}
/*
* Encode the chunk.
*
* When using the +E log format option, it will try to escape '"\]'
* characters with '\' as prefix. The same prefix should not be used as
* <escape>.
*/
static char *lf_encode_chunk(char *start, char *stop,
const char escape, const fd_set *map,
const struct chunk *chunk,
struct logformat_node *node)
{
char *str, *end;
if (node->options & LOG_OPT_ESC) {
if (start < stop) {
str = chunk->str;
end = chunk->str + chunk->len;
stop--; /* reserve one byte for the final '\0' */
while (start < stop && str < end) {
if (!FD_ISSET((unsigned char)(*str), map)) {
if (!FD_ISSET((unsigned char)(*str), rfc5424_escape_map))
*start++ = *str;
else {
if (start + 2 >= stop)
break;
*start++ = '\\';
*start++ = *str;
}
}
else {
if (start + 3 >= stop)
break;
*start++ = escape;
*start++ = hextab[(*str >> 4) & 15];
*start++ = hextab[*str & 15];
}
str++;
}
*start = '\0';
}
}
else {
return encode_chunk(start, stop, escape, map, chunk);
}
return start;
}
/*
* Write a string in the log string
* Take cares of quote and escape options
*
* Return the adress of the \0 character, or NULL on error
*/
char *lf_text_len(char *dst, const char *src, size_t len, size_t size, struct logformat_node *node)
{
if (size < 2)
return NULL;
if (node->options & LOG_OPT_QUOTE) {
*(dst++) = '"';
size--;
}
if (src && len) {
if (++len > size)
len = size;
if (node->options & LOG_OPT_ESC) {
char *ret;
ret = escape_string(dst, dst + len, '\\', rfc5424_escape_map, src);
if (ret == NULL || *ret != '\0')
return NULL;
len = ret - dst;
}
else {
len = strlcpy2(dst, src, len);
}
size -= len;
dst += len;
}
else if ((node->options & (LOG_OPT_QUOTE|LOG_OPT_MANDATORY)) == LOG_OPT_MANDATORY) {
if (size < 2)
return NULL;
*(dst++) = '-';
}
if (node->options & LOG_OPT_QUOTE) {
if (size < 2)
return NULL;
*(dst++) = '"';
}
*dst = '\0';
return dst;
}
static inline char *lf_text(char *dst, const char *src, size_t size, struct logformat_node *node)
{
return lf_text_len(dst, src, size, size, node);
}
/*
* Write a IP adress to the log string
* +X option write in hexadecimal notation, most signifant byte on the left
*/
char *lf_ip(char *dst, struct sockaddr *sockaddr, size_t size, struct logformat_node *node)
{
char *ret = dst;
int iret;
char pn[INET6_ADDRSTRLEN];
if (node->options & LOG_OPT_HEXA) {
const unsigned char *addr = (const unsigned char *)&((struct sockaddr_in *)sockaddr)->sin_addr.s_addr;
iret = snprintf(dst, size, "%02X%02X%02X%02X", addr[0], addr[1], addr[2], addr[3]);
if (iret < 0 || iret > size)
return NULL;
ret += iret;
} else {
addr_to_str((struct sockaddr_storage *)sockaddr, pn, sizeof(pn));
ret = lf_text(dst, pn, size, node);
if (ret == NULL)
return NULL;
}
return ret;
}
/*
* Write a port to the log
* +X option write in hexadecimal notation, most signifant byte on the left
*/
char *lf_port(char *dst, struct sockaddr *sockaddr, size_t size, struct logformat_node *node)
{
char *ret = dst;
int iret;
if (node->options & LOG_OPT_HEXA) {
const unsigned char *port = (const unsigned char *)&((struct sockaddr_in *)sockaddr)->sin_port;
iret = snprintf(dst, size, "%02X%02X", port[0], port[1]);
if (iret < 0 || iret > size)
return NULL;
ret += iret;
} else {
ret = ltoa_o(get_host_port((struct sockaddr_storage *)sockaddr), dst, size);
if (ret == NULL)
return NULL;
}
return ret;
}
/* Re-generate time-based part of the syslog header in RFC3164 format at
* the beginning of logheader once a second and return the pointer to the
* first character after it.
*/
static char *update_log_hdr(const time_t time)
{
static THREAD_LOCAL long tvsec;
static THREAD_LOCAL char *dataptr = NULL; /* backup of last end of header, NULL first time */
static THREAD_LOCAL struct chunk host = { NULL, 0, 0 };
static THREAD_LOCAL int sep = 0;
if (unlikely(time != tvsec || dataptr == NULL)) {
/* this string is rebuild only once a second */
struct tm tm;
int hdr_len;
tvsec = time;
get_localtime(tvsec, &tm);
if (unlikely(global.log_send_hostname != host.str)) {
host.str = global.log_send_hostname;
host.len = host.str ? strlen(host.str) : 0;
sep = host.len ? 1 : 0;
}
hdr_len = snprintf(logheader, global.max_syslog_len,
"<<<<>%s %2d %02d:%02d:%02d %.*s%*s",
monthname[tm.tm_mon],
tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
host.len, host.str, sep, "");
/* WARNING: depending upon implementations, snprintf may return
* either -1 or the number of bytes that would be needed to store
* the total message. In both cases, we must adjust it.
*/
if (hdr_len < 0 || hdr_len > global.max_syslog_len)
hdr_len = global.max_syslog_len;
dataptr = logheader + hdr_len;
}
dataptr[0] = 0; // ensure we get rid of any previous attempt
return dataptr;
}
/* Re-generate time-based part of the syslog header in RFC5424 format at
* the beginning of logheader_rfc5424 once a second and return the pointer
* to the first character after it.
*/
static char *update_log_hdr_rfc5424(const time_t time)
{
static THREAD_LOCAL long tvsec;
static THREAD_LOCAL char *dataptr = NULL; /* backup of last end of header, NULL first time */
const char *gmt_offset;
if (unlikely(time != tvsec || dataptr == NULL)) {
/* this string is rebuild only once a second */
struct tm tm;
int hdr_len;
tvsec = time;
get_localtime(tvsec, &tm);
gmt_offset = get_gmt_offset(time, &tm);
hdr_len = snprintf(logheader_rfc5424, global.max_syslog_len,
"<<<<>1 %4d-%02d-%02dT%02d:%02d:%02d%.3s:%.2s %s ",
tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec,
gmt_offset, gmt_offset+3,
global.log_send_hostname ? global.log_send_hostname : hostname);
/* WARNING: depending upon implementations, snprintf may return
* either -1 or the number of bytes that would be needed to store
* the total message. In both cases, we must adjust it.
*/
if (hdr_len < 0 || hdr_len > global.max_syslog_len)
hdr_len = global.max_syslog_len;
dataptr = logheader_rfc5424 + hdr_len;
}
dataptr[0] = 0; // ensure we get rid of any previous attempt
return dataptr;
}
/*
* This function sends the syslog message using a printf format string. It
* expects an LF-terminated message.
*/
void send_log(struct proxy *p, int level, const char *format, ...)
{
va_list argp;
int data_len;
if (level < 0 || format == NULL || logline == NULL)
return;
va_start(argp, format);
data_len = vsnprintf(logline, global.max_syslog_len, format, argp);
if (data_len < 0 || data_len > global.max_syslog_len)
data_len = global.max_syslog_len;
va_end(argp);
__send_log(p, level, logline, data_len, default_rfc5424_sd_log_format, 2);
}
/*
* This function sends a syslog message.
* It doesn't care about errors nor does it report them.
* It overrides the last byte of the message vector with an LF character.
* The arguments <sd> and <sd_size> are used for the structured-data part
* in RFC5424 formatted syslog messages.
*/
void __send_log(struct proxy *p, int level, char *message, size_t size, char *sd, size_t sd_size)
{
static THREAD_LOCAL struct iovec iovec[NB_MSG_IOVEC_ELEMENTS] = { };
static THREAD_LOCAL struct msghdr msghdr = {
//.msg_iov = iovec,
.msg_iovlen = NB_MSG_IOVEC_ELEMENTS
};
static THREAD_LOCAL int logfdunix = -1; /* syslog to AF_UNIX socket */
static THREAD_LOCAL int logfdinet = -1; /* syslog to AF_INET socket */
static THREAD_LOCAL char *dataptr = NULL;
int fac_level;
struct list *logsrvs = NULL;
struct logsrv *tmp = NULL;
int nblogger;
char *hdr, *hdr_ptr;
size_t hdr_size;
time_t time = date.tv_sec;
struct chunk *tag = &global.log_tag;
static THREAD_LOCAL int curr_pid;
static THREAD_LOCAL char pidstr[100];
static THREAD_LOCAL struct chunk pid;
msghdr.msg_iov = iovec;
dataptr = message;
if (p == NULL) {
if (!LIST_ISEMPTY(&global.logsrvs)) {
logsrvs = &global.logsrvs;
}
} else {
if (!LIST_ISEMPTY(&p->logsrvs)) {
logsrvs = &p->logsrvs;
}
if (p->log_tag.str) {
tag = &p->log_tag;
}
}
if (!logsrvs)
return;
if (unlikely(curr_pid != getpid())) {
curr_pid = getpid();
ltoa_o(curr_pid, pidstr, sizeof(pidstr));
chunk_initstr(&pid, pidstr);
}
/* Send log messages to syslog server. */
nblogger = 0;
list_for_each_entry(tmp, logsrvs, list) {
const struct logsrv *logsrv = tmp;
int *plogfd = logsrv->addr.ss_family == AF_UNIX ?
&logfdunix : &logfdinet;
char *pid_sep1 = NULL, *pid_sep2 = NULL;
int sent;
int maxlen;
int hdr_max = 0;
int tag_max = 0;
int pid_sep1_max = 0;
int pid_max = 0;
int pid_sep2_max = 0;
int sd_max = 0;
int max = 0;
nblogger++;
/* we can filter the level of the messages that are sent to each logger */
if (level > logsrv->level)
continue;
if (unlikely(*plogfd < 0)) {
/* socket not successfully initialized yet */
int proto = logsrv->addr.ss_family == AF_UNIX ? 0 : IPPROTO_UDP;
if ((*plogfd = socket(logsrv->addr.ss_family, SOCK_DGRAM, proto)) < 0) {
static char once;
if (!once) {
once = 1; /* note: no need for atomic ops here */
ha_alert("socket for logger #%d failed: %s (errno=%d)\n",
nblogger, strerror(errno), errno);
}
continue;
}
/* we don't want to receive anything on this socket */
setsockopt(*plogfd, SOL_SOCKET, SO_RCVBUF, &zero, sizeof(zero));
/* does nothing under Linux, maybe needed for others */
shutdown(*plogfd, SHUT_RD);
fcntl(*plogfd, F_SETFD, fcntl(*plogfd, F_GETFD, FD_CLOEXEC) | FD_CLOEXEC);
}
switch (logsrv->format) {
case LOG_FORMAT_RFC3164:
hdr = logheader;
hdr_ptr = update_log_hdr(time);
break;
case LOG_FORMAT_RFC5424:
hdr = logheader_rfc5424;
hdr_ptr = update_log_hdr_rfc5424(time);
sd_max = sd_size; /* the SD part allowed only in RFC5424 */
break;
default:
continue; /* must never happen */
}
hdr_size = hdr_ptr - hdr;
/* For each target, we may have a different facility.
* We can also have a different log level for each message.
* This induces variations in the message header length.
* Since we don't want to recompute it each time, nor copy it every
* time, we only change the facility in the pre-computed header,
* and we change the pointer to the header accordingly.
*/
fac_level = (logsrv->facility << 3) + MAX(level, logsrv->minlvl);
hdr_ptr = hdr + 3; /* last digit of the log level */
do {
*hdr_ptr = '0' + fac_level % 10;
fac_level /= 10;
hdr_ptr--;
} while (fac_level && hdr_ptr > hdr);
*hdr_ptr = '<';
hdr_max = hdr_size - (hdr_ptr - hdr);
/* time-based header */
if (unlikely(hdr_size >= logsrv->maxlen)) {
hdr_max = MIN(hdr_max, logsrv->maxlen) - 1;
sd_max = 0;
goto send;
}
maxlen = logsrv->maxlen - hdr_max;
/* tag */
tag_max = tag->len;
if (unlikely(tag_max >= maxlen)) {
tag_max = maxlen - 1;
sd_max = 0;
goto send;
}
maxlen -= tag_max;
/* first pid separator */
pid_sep1_max = log_formats[logsrv->format].pid.sep1.len;
if (unlikely(pid_sep1_max >= maxlen)) {
pid_sep1_max = maxlen - 1;
sd_max = 0;
goto send;
}
pid_sep1 = log_formats[logsrv->format].pid.sep1.str;
maxlen -= pid_sep1_max;
/* pid */
pid_max = pid.len;
if (unlikely(pid_max >= maxlen)) {
pid_max = maxlen - 1;
sd_max = 0;
goto send;
}
maxlen -= pid_max;
/* second pid separator */
pid_sep2_max = log_formats[logsrv->format].pid.sep2.len;
if (unlikely(pid_sep2_max >= maxlen)) {
pid_sep2_max = maxlen - 1;
sd_max = 0;
goto send;
}
pid_sep2 = log_formats[logsrv->format].pid.sep2.str;
maxlen -= pid_sep2_max;
/* structured-data */
if (sd_max >= maxlen) {
sd_max = maxlen - 1;
goto send;
}
max = MIN(size, maxlen - sd_max) - 1;
send:
iovec[0].iov_base = hdr_ptr;
iovec[0].iov_len = hdr_max;
iovec[1].iov_base = tag->str;
iovec[1].iov_len = tag_max;
iovec[2].iov_base = pid_sep1;
iovec[2].iov_len = pid_sep1_max;
iovec[3].iov_base = pid.str;
iovec[3].iov_len = pid_max;
iovec[4].iov_base = pid_sep2;
iovec[4].iov_len = pid_sep2_max;
iovec[5].iov_base = sd;
iovec[5].iov_len = sd_max;
iovec[6].iov_base = dataptr;
iovec[6].iov_len = max;
iovec[7].iov_base = "\n"; /* insert a \n at the end of the message */
iovec[7].iov_len = 1;
msghdr.msg_name = (struct sockaddr *)&logsrv->addr;
msghdr.msg_namelen = get_addr_len(&logsrv->addr);
sent = sendmsg(*plogfd, &msghdr, MSG_DONTWAIT | MSG_NOSIGNAL);
if (sent < 0) {
static char once;
if (!once) {
once = 1; /* note: no need for atomic ops here */
ha_alert("sendmsg logger #%d failed: %s (errno=%d)\n",
nblogger, strerror(errno), errno);
}
}
}
}
extern fd_set hdr_encode_map[];
extern fd_set url_encode_map[];
extern fd_set http_encode_map[];
const char sess_cookie[8] = "NIDVEOU7"; /* No cookie, Invalid cookie, cookie for a Down server, Valid cookie, Expired cookie, Old cookie, Unused, unknown */
const char sess_set_cookie[8] = "NPDIRU67"; /* No set-cookie, Set-cookie found and left unchanged (passive),
Set-cookie Deleted, Set-Cookie Inserted, Set-cookie Rewritten,
Set-cookie Updated, unknown, unknown */
/*
* try to write a character if there is enough space, or goto out
*/
#define LOGCHAR(x) do { \
if (tmplog < dst + maxsize - 1) { \
*(tmplog++) = (x); \
} else { \
goto out; \
} \
} while(0)
/* Initializes some log data.
*/
void init_log()
{
char *tmp;
/* Initialize the escape map for the RFC5424 structured-data : '"\]'
* inside PARAM-VALUE should be escaped with '\' as prefix.
* See https://tools.ietf.org/html/rfc5424#section-6.3.3 for more
* details.
*/
memset(rfc5424_escape_map, 0, sizeof(rfc5424_escape_map));
tmp = "\"\\]";
while (*tmp) {
FD_SET(*tmp, rfc5424_escape_map);
tmp++;
}
}
static int init_log_buffers_per_thread()
{
return init_log_buffers();
}
static void deinit_log_buffers_per_thread()
{
deinit_log_buffers();
}
/* Initialize log buffers used for syslog messages */
int init_log_buffers()
{
logheader = my_realloc2(logheader, global.max_syslog_len + 1);
logheader_rfc5424 = my_realloc2(logheader_rfc5424, global.max_syslog_len + 1);
logline = my_realloc2(logline, global.max_syslog_len + 1);
logline_rfc5424 = my_realloc2(logline_rfc5424, global.max_syslog_len + 1);
if (!logheader || !logline_rfc5424 || !logline || !logline_rfc5424)
return 0;
return 1;
}
/* Deinitialize log buffers used for syslog messages */
void deinit_log_buffers()
{
free(logheader);
free(logheader_rfc5424);
free(logline);
free(logline_rfc5424);
free(startup_logs);
logheader = NULL;
logheader_rfc5424 = NULL;
logline = NULL;
logline_rfc5424 = NULL;
startup_logs = NULL;
}
/* Builds a log line in <dst> based on <list_format>, and stops before reaching
* <maxsize> characters. Returns the size of the output string in characters,
* not counting the trailing zero which is always added if the resulting size
* is not zero.
*/
int build_logline(struct stream *s, char *dst, size_t maxsize, struct list *list_format)
{
struct session *sess = strm_sess(s);
struct proxy *fe = sess->fe;
struct proxy *be = s->be;
struct http_txn *txn = s->txn;
struct chunk chunk;
char *uri;
char *spc;
char *qmark;
char *end;
struct tm tm;
int t_request;
int hdr;
int last_isspace = 1;
int nspaces = 0;
char *tmplog;
char *ret;
int iret;
struct logformat_node *tmp;
struct timeval tv;
/* FIXME: let's limit ourselves to frontend logging for now. */
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);
tmplog = dst;
/* fill logbuffer */
if (LIST_ISEMPTY(list_format))
return 0;
list_for_each_entry(tmp, list_format, list) {
struct connection *conn;
const char *src = NULL;
struct sample *key;
const struct chunk empty = { NULL, 0, 0 };
switch (tmp->type) {
case LOG_FMT_SEPARATOR:
if (!last_isspace) {
LOGCHAR(' ');
last_isspace = 1;
}
break;
case LOG_FMT_TEXT: // text
src = tmp->arg;
iret = strlcpy2(tmplog, src, dst + maxsize - tmplog);
if (iret == 0)
goto out;
tmplog += iret;
last_isspace = 0;
break;
case LOG_FMT_EXPR: // sample expression, may be request or response
key = NULL;
if (tmp->options & LOG_OPT_REQ_CAP)
key = sample_fetch_as_type(be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, tmp->expr, SMP_T_STR);
if (!key && (tmp->options & LOG_OPT_RES_CAP))
key = sample_fetch_as_type(be, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL, tmp->expr, SMP_T_STR);
if (tmp->options & LOG_OPT_HTTP)
ret = lf_encode_chunk(tmplog, dst + maxsize,
'%', http_encode_map, key ? &key->data.u.str : &empty, tmp);
else
ret = lf_text_len(tmplog, key ? key->data.u.str.str : NULL, key ? key->data.u.str.len : 0, dst + maxsize - tmplog, tmp);
if (ret == 0)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_CLIENTIP: // %ci
conn = objt_conn(sess->origin);
if (conn)
ret = lf_ip(tmplog, (struct sockaddr *)&conn->addr.from, dst + maxsize - tmplog, tmp);
else
ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_CLIENTPORT: // %cp
conn = objt_conn(sess->origin);
if (conn) {
if (conn->addr.from.ss_family == AF_UNIX) {
ret = ltoa_o(sess->listener->luid, tmplog, dst + maxsize - tmplog);
} else {
ret = lf_port(tmplog, (struct sockaddr *)&conn->addr.from,
dst + maxsize - tmplog, tmp);
}
}
else
ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_FRONTENDIP: // %fi
conn = objt_conn(sess->origin);
if (conn) {
conn_get_to_addr(conn);
ret = lf_ip(tmplog, (struct sockaddr *)&conn->addr.to, dst + maxsize - tmplog, tmp);
}
else
ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_FRONTENDPORT: // %fp
conn = objt_conn(sess->origin);
if (conn) {
conn_get_to_addr(conn);
if (conn->addr.to.ss_family == AF_UNIX)
ret = ltoa_o(sess->listener->luid, tmplog, dst + maxsize - tmplog);
else
ret = lf_port(tmplog, (struct sockaddr *)&conn->addr.to, dst + maxsize - tmplog, tmp);
}
else
ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_BACKENDIP: // %bi
conn = cs_conn(objt_cs(s->si[1].end));
if (conn)
ret = lf_ip(tmplog, (struct sockaddr *)&conn->addr.from, dst + maxsize - tmplog, tmp);
else
ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_BACKENDPORT: // %bp
conn = cs_conn(objt_cs(s->si[1].end));
if (conn)
ret = lf_port(tmplog, (struct sockaddr *)&conn->addr.from, dst + maxsize - tmplog, tmp);
else
ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_SERVERIP: // %si
conn = cs_conn(objt_cs(s->si[1].end));
if (conn)
ret = lf_ip(tmplog, (struct sockaddr *)&conn->addr.to, dst + maxsize - tmplog, tmp);
else
ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_SERVERPORT: // %sp
conn = cs_conn(objt_cs(s->si[1].end));
if (conn)
ret = lf_port(tmplog, (struct sockaddr *)&conn->addr.to, dst + maxsize - tmplog, tmp);
else
ret = lf_text_len(tmplog, NULL, 0, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_DATE: // %t = accept date
get_localtime(s->logs.accept_date.tv_sec, &tm);
ret = date2str_log(tmplog, &tm, &(s->logs.accept_date),
dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_tr: // %tr = start of request date
/* Note that the timers are valid if we get here */
tv_ms_add(&tv, &s->logs.accept_date, s->logs.t_idle >= 0 ? s->logs.t_idle + s->logs.t_handshake : 0);
get_localtime(tv.tv_sec, &tm);
ret = date2str_log(tmplog, &tm, &tv, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_DATEGMT: // %T = accept date, GMT
get_gmtime(s->logs.accept_date.tv_sec, &tm);
ret = gmt2str_log(tmplog, &tm, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_trg: // %trg = start of request date, GMT
tv_ms_add(&tv, &s->logs.accept_date, s->logs.t_idle >= 0 ? s->logs.t_idle + s->logs.t_handshake : 0);
get_gmtime(tv.tv_sec, &tm);
ret = gmt2str_log(tmplog, &tm, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_DATELOCAL: // %Tl = accept date, local
get_localtime(s->logs.accept_date.tv_sec, &tm);
ret = localdate2str_log(tmplog, s->logs.accept_date.tv_sec, &tm, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_trl: // %trl = start of request date, local
tv_ms_add(&tv, &s->logs.accept_date, s->logs.t_idle >= 0 ? s->logs.t_idle + s->logs.t_handshake : 0);
get_localtime(tv.tv_sec, &tm);
ret = localdate2str_log(tmplog, tv.tv_sec, &tm, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_TS: // %Ts
get_gmtime(s->logs.accept_date.tv_sec, &tm);
if (tmp->options & LOG_OPT_HEXA) {
iret = snprintf(tmplog, dst + maxsize - tmplog, "%04X", (unsigned int)s->logs.accept_date.tv_sec);
if (iret < 0 || iret > dst + maxsize - tmplog)
goto out;
last_isspace = 0;
tmplog += iret;
} else {
ret = ltoa_o(s->logs.accept_date.tv_sec, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
}
break;
case LOG_FMT_MS: // %ms
if (tmp->options & LOG_OPT_HEXA) {
iret = snprintf(tmplog, dst + maxsize - tmplog, "%02X",(unsigned int)s->logs.accept_date.tv_usec/1000);
if (iret < 0 || iret > dst + maxsize - tmplog)
goto out;
last_isspace = 0;
tmplog += iret;
} else {
if ((dst + maxsize - tmplog) < 4)
goto out;
ret = utoa_pad((unsigned int)s->logs.accept_date.tv_usec/1000,
tmplog, 4);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
}
break;
case LOG_FMT_FRONTEND: // %f
src = fe->id;
ret = lf_text(tmplog, src, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_FRONTEND_XPRT: // %ft
src = fe->id;
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
iret = strlcpy2(tmplog, src, dst + maxsize - tmplog);
if (iret == 0)
goto out;
tmplog += iret;
if (sess->listener->bind_conf->xprt == xprt_get(XPRT_SSL))
LOGCHAR('~');
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
break;
#ifdef USE_OPENSSL
case LOG_FMT_SSL_CIPHER: // %sslc
src = NULL;
conn = objt_conn(sess->origin);
if (conn) {
src = ssl_sock_get_cipher_name(conn);
}
ret = lf_text(tmplog, src, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_SSL_VERSION: // %sslv
src = NULL;
conn = objt_conn(sess->origin);
if (conn) {
src = ssl_sock_get_proto_version(conn);
}
ret = lf_text(tmplog, src, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
#endif
case LOG_FMT_BACKEND: // %b
src = be->id;
ret = lf_text(tmplog, src, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_SERVER: // %s
switch (obj_type(s->target)) {
case OBJ_TYPE_SERVER:
src = objt_server(s->target)->id;
break;
case OBJ_TYPE_APPLET:
src = objt_applet(s->target)->name;
break;
default:
src = "<NOSRV>";
break;
}
ret = lf_text(tmplog, src, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_Th: // %Th = handshake time
ret = ltoa_o(s->logs.t_handshake, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_Ti: // %Ti = HTTP idle time
ret = ltoa_o(s->logs.t_idle, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_TR: // %TR = HTTP request time
ret = ltoa_o((t_request >= 0) ? t_request - s->logs.t_idle - s->logs.t_handshake : -1,
tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_TQ: // %Tq = Th + Ti + TR
ret = ltoa_o(t_request, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_TW: // %Tw
ret = ltoa_o((s->logs.t_queue >= 0) ? s->logs.t_queue - t_request : -1,
tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_TC: // %Tc
ret = ltoa_o((s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_Tr: // %Tr
ret = ltoa_o((s->logs.t_data >= 0) ? s->logs.t_data - s->logs.t_connect : -1,
tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_TD: // %Td
if (s->be->mode == PR_MODE_HTTP)
ret = ltoa_o((s->logs.t_data >= 0) ? s->logs.t_close - s->logs.t_data : -1,
tmplog, dst + maxsize - tmplog);
else
ret = ltoa_o((s->logs.t_connect >= 0) ? s->logs.t_close - s->logs.t_connect : -1,
tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_Ta: // %Ta = active time = Tt - Th - Ti
if (!(fe->to_log & LW_BYTES))
LOGCHAR('+');
ret = ltoa_o(s->logs.t_close - (s->logs.t_idle >= 0 ? s->logs.t_idle + s->logs.t_handshake : 0),
tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_TT: // %Tt = total time
if (!(fe->to_log & LW_BYTES))
LOGCHAR('+');
ret = ltoa_o(s->logs.t_close, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_STATUS: // %ST
ret = ltoa_o(txn ? txn->status : 0, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_BYTES: // %B
if (!(fe->to_log & LW_BYTES))
LOGCHAR('+');
ret = lltoa(s->logs.bytes_out, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_BYTES_UP: // %U
ret = lltoa(s->logs.bytes_in, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_CCLIENT: // %CC
src = txn ? txn->cli_cookie : NULL;
ret = lf_text(tmplog, src, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_CSERVER: // %CS
src = txn ? txn->srv_cookie : NULL;
ret = lf_text(tmplog, src, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_TERMSTATE: // %ts
LOGCHAR(sess_term_cond[(s->flags & SF_ERR_MASK) >> SF_ERR_SHIFT]);
LOGCHAR(sess_fin_state[(s->flags & SF_FINST_MASK) >> SF_FINST_SHIFT]);
*tmplog = '\0';
last_isspace = 0;
break;
case LOG_FMT_TERMSTATE_CK: // %tsc, same as TS with cookie state (for mode HTTP)
LOGCHAR(sess_term_cond[(s->flags & SF_ERR_MASK) >> SF_ERR_SHIFT]);
LOGCHAR(sess_fin_state[(s->flags & SF_FINST_MASK) >> SF_FINST_SHIFT]);
LOGCHAR((txn && (be->ck_opts & PR_CK_ANY)) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-');
LOGCHAR((txn && (be->ck_opts & PR_CK_ANY)) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-');
last_isspace = 0;
break;
case LOG_FMT_ACTCONN: // %ac
ret = ltoa_o(actconn, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_FECONN: // %fc
ret = ltoa_o(fe->feconn, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_BECONN: // %bc
ret = ltoa_o(be->beconn, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_SRVCONN: // %sc
ret = ultoa_o(objt_server(s->target) ?
objt_server(s->target)->cur_sess :
0, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_RETRIES: // %rq
if (s->flags & SF_REDISP)
LOGCHAR('+');
ret = ltoa_o((s->si[1].conn_retries>0) ?
(be->conn_retries - s->si[1].conn_retries) :
be->conn_retries, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_SRVQUEUE: // %sq
ret = ltoa_o(s->logs.srv_queue_size, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_BCKQUEUE: // %bq
ret = ltoa_o(s->logs.prx_queue_size, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_HDRREQUEST: // %hr
/* request header */
if (fe->nb_req_cap && s->req_cap) {
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
LOGCHAR('{');
for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
if (hdr)
LOGCHAR('|');
if (s->req_cap[hdr] != NULL) {
ret = lf_encode_string(tmplog, dst + maxsize,
'#', hdr_encode_map, s->req_cap[hdr], tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
}
}
LOGCHAR('}');
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
}
break;
case LOG_FMT_HDRREQUESTLIST: // %hrl
/* request header list */
if (fe->nb_req_cap && s->req_cap) {
for (hdr = 0; hdr < fe->nb_req_cap; hdr++) {
if (hdr > 0)
LOGCHAR(' ');
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
if (s->req_cap[hdr] != NULL) {
ret = lf_encode_string(tmplog, dst + maxsize,
'#', hdr_encode_map, s->req_cap[hdr], tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
} else if (!(tmp->options & LOG_OPT_QUOTE))
LOGCHAR('-');
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
}
}
break;
case LOG_FMT_HDRRESPONS: // %hs
/* response header */
if (fe->nb_rsp_cap && s->res_cap) {
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
LOGCHAR('{');
for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
if (hdr)
LOGCHAR('|');
if (s->res_cap[hdr] != NULL) {
ret = lf_encode_string(tmplog, dst + maxsize,
'#', hdr_encode_map, s->res_cap[hdr], tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
}
}
LOGCHAR('}');
last_isspace = 0;
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
}
break;
case LOG_FMT_HDRRESPONSLIST: // %hsl
/* response header list */
if (fe->nb_rsp_cap && s->res_cap) {
for (hdr = 0; hdr < fe->nb_rsp_cap; hdr++) {
if (hdr > 0)
LOGCHAR(' ');
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
if (s->res_cap[hdr] != NULL) {
ret = lf_encode_string(tmplog, dst + maxsize,
'#', hdr_encode_map, s->res_cap[hdr], tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
} else if (!(tmp->options & LOG_OPT_QUOTE))
LOGCHAR('-');
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
}
}
break;
case LOG_FMT_REQ: // %r
/* Request */
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
uri = txn && txn->uri ? txn->uri : "<BADREQ>";
ret = lf_encode_string(tmplog, dst + maxsize,
'#', url_encode_map, uri, tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
break;
case LOG_FMT_HTTP_PATH: // %HP
uri = txn && txn->uri ? txn->uri : "<BADREQ>";
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
end = uri + strlen(uri);
// look for the first whitespace character
while (uri < end && !HTTP_IS_SPHT(*uri))
uri++;
// keep advancing past multiple spaces
while (uri < end && HTTP_IS_SPHT(*uri)) {
uri++; nspaces++;
}
// look for first space or question mark after url
spc = uri;
while (spc < end && *spc != '?' && !HTTP_IS_SPHT(*spc))
spc++;
if (!txn || !txn->uri || nspaces == 0) {
chunk.str = "<BADREQ>";
chunk.len = strlen("<BADREQ>");
} else {
chunk.str = uri;
chunk.len = spc - uri;
}
ret = lf_encode_chunk(tmplog, dst + maxsize, '#', url_encode_map, &chunk, tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
break;
case LOG_FMT_HTTP_QUERY: // %HQ
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
if (!txn || !txn->uri) {
chunk.str = "<BADREQ>";
chunk.len = strlen("<BADREQ>");
} else {
uri = txn->uri;
end = uri + strlen(uri);
// look for the first question mark
while (uri < end && *uri != '?')
uri++;
qmark = uri;
// look for first space or question mark after url
while (uri < end && !HTTP_IS_SPHT(*uri))
uri++;
chunk.str = qmark;
chunk.len = uri - qmark;
}
ret = lf_encode_chunk(tmplog, dst + maxsize, '#', url_encode_map, &chunk, tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
break;
case LOG_FMT_HTTP_URI: // %HU
uri = txn && txn->uri ? txn->uri : "<BADREQ>";
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
end = uri + strlen(uri);
// look for the first whitespace character
while (uri < end && !HTTP_IS_SPHT(*uri))
uri++;
// keep advancing past multiple spaces
while (uri < end && HTTP_IS_SPHT(*uri)) {
uri++; nspaces++;
}
// look for first space after url
spc = uri;
while (spc < end && !HTTP_IS_SPHT(*spc))
spc++;
if (!txn || !txn->uri || nspaces == 0) {
chunk.str = "<BADREQ>";
chunk.len = strlen("<BADREQ>");
} else {
chunk.str = uri;
chunk.len = spc - uri;
}
ret = lf_encode_chunk(tmplog, dst + maxsize, '#', url_encode_map, &chunk, tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
break;
case LOG_FMT_HTTP_METHOD: // %HM
uri = txn && txn->uri ? txn->uri : "<BADREQ>";
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
end = uri + strlen(uri);
// look for the first whitespace character
spc = uri;
while (spc < end && !HTTP_IS_SPHT(*spc))
spc++;
if (spc == end) { // odd case, we have txn->uri, but we only got a verb
chunk.str = "<BADREQ>";
chunk.len = strlen("<BADREQ>");
} else {
chunk.str = uri;
chunk.len = spc - uri;
}
ret = lf_encode_chunk(tmplog, dst + maxsize, '#', url_encode_map, &chunk, tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
break;
case LOG_FMT_HTTP_VERSION: // %HV
uri = txn && txn->uri ? txn->uri : "<BADREQ>";
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
end = uri + strlen(uri);
// look for the first whitespace character
while (uri < end && !HTTP_IS_SPHT(*uri))
uri++;
// keep advancing past multiple spaces
while (uri < end && HTTP_IS_SPHT(*uri)) {
uri++; nspaces++;
}
// look for the next whitespace character
while (uri < end && !HTTP_IS_SPHT(*uri))
uri++;
// keep advancing past multiple spaces
while (uri < end && HTTP_IS_SPHT(*uri))
uri++;
if (!txn || !txn->uri || nspaces == 0) {
chunk.str = "<BADREQ>";
chunk.len = strlen("<BADREQ>");
} else if (uri == end) {
chunk.str = "HTTP/0.9";
chunk.len = strlen("HTTP/0.9");
} else {
chunk.str = uri;
chunk.len = end - uri;
}
ret = lf_encode_chunk(tmplog, dst + maxsize, '#', url_encode_map, &chunk, tmp);
if (ret == NULL || *ret != '\0')
goto out;
tmplog = ret;
if (tmp->options & LOG_OPT_QUOTE)
LOGCHAR('"');
last_isspace = 0;
break;
case LOG_FMT_COUNTER: // %rt
if (tmp->options & LOG_OPT_HEXA) {
iret = snprintf(tmplog, dst + maxsize - tmplog, "%04X", s->uniq_id);
if (iret < 0 || iret > dst + maxsize - tmplog)
goto out;
last_isspace = 0;
tmplog += iret;
} else {
ret = ltoa_o(s->uniq_id, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
}
break;
case LOG_FMT_LOGCNT: // %lc
if (tmp->options & LOG_OPT_HEXA) {
iret = snprintf(tmplog, dst + maxsize - tmplog, "%04X", fe->log_count);
if (iret < 0 || iret > dst + maxsize - tmplog)
goto out;
last_isspace = 0;
tmplog += iret;
} else {
ret = ultoa_o(fe->log_count, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
}
break;
case LOG_FMT_HOSTNAME: // %H
src = hostname;
ret = lf_text(tmplog, src, dst + maxsize - tmplog, tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
case LOG_FMT_PID: // %pid
if (tmp->options & LOG_OPT_HEXA) {
iret = snprintf(tmplog, dst + maxsize - tmplog, "%04X", pid);
if (iret < 0 || iret > dst + maxsize - tmplog)
goto out;
last_isspace = 0;
tmplog += iret;
} else {
ret = ltoa_o(pid, tmplog, dst + maxsize - tmplog);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
}
break;
case LOG_FMT_UNIQUEID: // %ID
ret = NULL;
src = s->unique_id;
ret = lf_text(tmplog, src, maxsize - (tmplog - dst), tmp);
if (ret == NULL)
goto out;
tmplog = ret;
last_isspace = 0;
break;
}
}
out:
/* *tmplog is a unused character */
*tmplog = '\0';
return tmplog - dst;
}
/*
* send a log for the stream when we have enough info about it.
* Will not log if the frontend has no log defined.
*/
void strm_log(struct stream *s)
{
struct session *sess = s->sess;
int size, err, level;
int sd_size = 0;
/* if we don't want to log normal traffic, return now */
err = (s->flags & SF_REDISP) ||
((s->flags & SF_ERR_MASK) > SF_ERR_LOCAL) ||
(((s->flags & SF_ERR_MASK) == SF_ERR_NONE) &&
(s->si[1].conn_retries != s->be->conn_retries)) ||
((sess->fe->mode == PR_MODE_HTTP) && s->txn && s->txn->status >= 500);
if (!err && (sess->fe->options2 & PR_O2_NOLOGNORM))
return;
if (LIST_ISEMPTY(&sess->fe->logsrvs))
return;
if (s->logs.level) { /* loglevel was overridden */
if (s->logs.level == -1) {
s->logs.logwait = 0; /* logs disabled */
return;
}
level = s->logs.level - 1;
}
else {
level = LOG_INFO;
if (err && (sess->fe->options2 & PR_O2_LOGERRORS))
level = LOG_ERR;
}
/* if unique-id was not generated */
if (!s->unique_id && !LIST_ISEMPTY(&sess->fe->format_unique_id)) {
if ((s->unique_id = pool_alloc(pool_head_uniqueid)) != NULL)
build_logline(s, s->unique_id, UNIQUEID_LEN, &sess->fe->format_unique_id);
}
if (!LIST_ISEMPTY(&sess->fe->logformat_sd)) {
sd_size = build_logline(s, logline_rfc5424, global.max_syslog_len,
&sess->fe->logformat_sd);
}
size = build_logline(s, logline, global.max_syslog_len, &sess->fe->logformat);
if (size > 0) {
HA_ATOMIC_ADD(&sess->fe->log_count, 1);
__send_log(sess->fe, level, logline, size + 1, logline_rfc5424, sd_size);
s->logs.logwait = 0;
}
}
static int cli_io_handler_show_startup_logs(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
const char *msg = (startup_logs ? startup_logs : "No startup alerts/warnings.\n");
if (ci_putstr(si_ic(si), msg) == -1) {
si_applet_cant_put(si);
return 0;
}
return 1;
}
/* register cli keywords */
static struct cli_kw_list cli_kws = {{ },{
{ { "show", "startup-logs", NULL },
"show startup-logs : report logs emitted during HAProxy startup",
NULL, cli_io_handler_show_startup_logs },
{{},}
}};
__attribute__((constructor))
static void __log_init(void)
{
hap_register_per_thread_init(init_log_buffers_per_thread);
hap_register_per_thread_deinit(deinit_log_buffers_per_thread);
cli_register_kw(&cli_kws);
}
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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