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Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
2 * General logging functions.
3 *
Willy Tarreaub7f694f2008-06-22 17:18:02 +02004 * Copyright 2000-2008 Willy Tarreau <w@1wt.eu>
Willy Tarreaubaaee002006-06-26 02:48:02 +02005 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 */
12
Willy Tarreauc8f24f82007-11-30 18:38:35 +010013#include <fcntl.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020014#include <stdarg.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <string.h>
18#include <syslog.h>
19#include <time.h>
20#include <unistd.h>
Robert Tsai81ae1952007-12-05 10:47:29 +010021#include <errno.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020022
23#include <sys/time.h>
24
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020025#include <common/config.h>
Willy Tarreaud6d06902009-08-19 11:22:33 +020026#include <common/compat.h>
Willy Tarreau2dd0d472006-06-29 17:53:05 +020027#include <common/standard.h>
Willy Tarreaufb278672006-10-15 15:38:50 +020028#include <common/time.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020029
Willy Tarreaubaaee002006-06-26 02:48:02 +020030#include <types/global.h>
Willy Tarreauec6c5df2008-07-15 00:22:45 +020031
32#include <proto/log.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020033
Willy Tarreaubaaee002006-06-26 02:48:02 +020034const char *log_facilities[NB_LOG_FACILITIES] = {
35 "kern", "user", "mail", "daemon",
36 "auth", "syslog", "lpr", "news",
37 "uucp", "cron", "auth2", "ftp",
38 "ntp", "audit", "alert", "cron2",
39 "local0", "local1", "local2", "local3",
40 "local4", "local5", "local6", "local7"
41};
42
43
44const char *log_levels[NB_LOG_LEVELS] = {
45 "emerg", "alert", "crit", "err",
46 "warning", "notice", "info", "debug"
47};
48
49const char *monthname[12] = {
50 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
51 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
52};
53
54const char sess_term_cond[8] = "-cCsSPRI"; /* normal, CliTo, CliErr, SrvTo, SrvErr, PxErr, Resource, Internal */
Willy Tarreaub8750a82006-09-03 09:56:00 +020055const char sess_fin_state[8] = "-RCHDLQT"; /* cliRequest, srvConnect, srvHeader, Data, Last, Queue, Tarpit */
Willy Tarreaubaaee002006-06-26 02:48:02 +020056
57/*
58 * Displays the message on stderr with the date and pid. Overrides the quiet
59 * mode during startup.
60 */
Willy Tarreaub17916e2006-10-15 15:17:57 +020061void Alert(const char *fmt, ...)
Willy Tarreaubaaee002006-06-26 02:48:02 +020062{
63 va_list argp;
Willy Tarreaufe944602007-10-25 10:34:16 +020064 struct tm tm;
Willy Tarreaubaaee002006-06-26 02:48:02 +020065
66 if (!(global.mode & MODE_QUIET) || (global.mode & (MODE_VERBOSE | MODE_STARTING))) {
67 va_start(argp, fmt);
68
Willy Tarreaub7f694f2008-06-22 17:18:02 +020069 get_localtime(date.tv_sec, &tm);
Willy Tarreaubaaee002006-06-26 02:48:02 +020070 fprintf(stderr, "[ALERT] %03d/%02d%02d%02d (%d) : ",
Willy Tarreaufe944602007-10-25 10:34:16 +020071 tm.tm_yday, tm.tm_hour, tm.tm_min, tm.tm_sec, (int)getpid());
Willy Tarreaubaaee002006-06-26 02:48:02 +020072 vfprintf(stderr, fmt, argp);
73 fflush(stderr);
74 va_end(argp);
75 }
76}
77
78
79/*
80 * Displays the message on stderr with the date and pid.
81 */
Willy Tarreaub17916e2006-10-15 15:17:57 +020082void Warning(const char *fmt, ...)
Willy Tarreaubaaee002006-06-26 02:48:02 +020083{
84 va_list argp;
Willy Tarreaufe944602007-10-25 10:34:16 +020085 struct tm tm;
Willy Tarreaubaaee002006-06-26 02:48:02 +020086
87 if (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) {
88 va_start(argp, fmt);
89
Willy Tarreaub7f694f2008-06-22 17:18:02 +020090 get_localtime(date.tv_sec, &tm);
Willy Tarreaubaaee002006-06-26 02:48:02 +020091 fprintf(stderr, "[WARNING] %03d/%02d%02d%02d (%d) : ",
Willy Tarreaufe944602007-10-25 10:34:16 +020092 tm.tm_yday, tm.tm_hour, tm.tm_min, tm.tm_sec, (int)getpid());
Willy Tarreaubaaee002006-06-26 02:48:02 +020093 vfprintf(stderr, fmt, argp);
94 fflush(stderr);
95 va_end(argp);
96 }
97}
98
99/*
100 * Displays the message on <out> only if quiet mode is not set.
101 */
Willy Tarreaub17916e2006-10-15 15:17:57 +0200102void qfprintf(FILE *out, const char *fmt, ...)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200103{
104 va_list argp;
105
106 if (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) {
107 va_start(argp, fmt);
108 vfprintf(out, fmt, argp);
109 fflush(out);
110 va_end(argp);
111 }
112}
113
114/*
115 * returns log level for <lev> or -1 if not found.
116 */
117int get_log_level(const char *lev)
118{
119 int level;
120
121 level = NB_LOG_LEVELS - 1;
122 while (level >= 0 && strcmp(log_levels[level], lev))
123 level--;
124
125 return level;
126}
127
128
129/*
130 * returns log facility for <fac> or -1 if not found.
131 */
132int get_log_facility(const char *fac)
133{
134 int facility;
135
136 facility = NB_LOG_FACILITIES - 1;
137 while (facility >= 0 && strcmp(log_facilities[facility], fac))
138 facility--;
139
140 return facility;
141}
142
Robert Tsai81ae1952007-12-05 10:47:29 +0100143/*
144 * Return the length of the address endpoint, suitable for use with sendto().
145 */
Willy Tarreau019767b2007-12-05 11:11:55 +0100146static inline int logsrv_addrlen(const struct logsrv *logsrv)
Robert Tsai81ae1952007-12-05 10:47:29 +0100147{
Robert Tsai81ae1952007-12-05 10:47:29 +0100148 switch (logsrv->u.addr.sa_family) {
149 case AF_UNIX:
150 return sizeof(logsrv->u.un);
151 case AF_INET:
152 return sizeof(logsrv->u.in);
153 default:
154 break;
155 }
Robert Tsai81ae1952007-12-05 10:47:29 +0100156 return -1;
157}
Willy Tarreaubaaee002006-06-26 02:48:02 +0200158
Willy Tarreaubaaee002006-06-26 02:48:02 +0200159/*
160 * This function sends a syslog message to both log servers of a proxy,
161 * or to global log servers if the proxy is NULL.
162 * It also tries not to waste too much time computing the message header.
163 * It doesn't care about errors nor does it report them.
164 */
Willy Tarreaub17916e2006-10-15 15:17:57 +0200165void send_log(struct proxy *p, int level, const char *message, ...)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200166{
Robert Tsai81ae1952007-12-05 10:47:29 +0100167 static int logfdunix = -1; /* syslog to AF_UNIX socket */
168 static int logfdinet = -1; /* syslog to AF_INET socket */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200169 static long tvsec = -1; /* to force the string to be initialized */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200170 va_list argp;
171 static char logmsg[MAX_SYSLOG_LEN];
172 static char *dataptr = NULL;
173 int fac_level;
174 int hdr_len, data_len;
Robert Tsai81ae1952007-12-05 10:47:29 +0100175 struct logsrv *logsrvs[2];
Willy Tarreauf7edefa2009-05-10 17:20:05 +0200176 int facilities[2], loglevel[2], minlvl[2];
Robert Tsai81ae1952007-12-05 10:47:29 +0100177 int nblogger;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200178 int nbloggers = 0;
179 char *log_ptr;
180
Willy Tarreaubaaee002006-06-26 02:48:02 +0200181 if (level < 0 || progname == NULL || message == NULL)
182 return;
183
Willy Tarreaub7f694f2008-06-22 17:18:02 +0200184 if (unlikely(date.tv_sec != tvsec || dataptr == NULL)) {
Willy Tarreaubaaee002006-06-26 02:48:02 +0200185 /* this string is rebuild only once a second */
Willy Tarreaufe944602007-10-25 10:34:16 +0200186 struct tm tm;
187
Willy Tarreaub7f694f2008-06-22 17:18:02 +0200188 tvsec = date.tv_sec;
Willy Tarreaufe944602007-10-25 10:34:16 +0200189 get_localtime(tvsec, &tm);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200190
191 hdr_len = snprintf(logmsg, sizeof(logmsg),
192 "<<<<>%s %2d %02d:%02d:%02d %s[%d]: ",
Willy Tarreaufe944602007-10-25 10:34:16 +0200193 monthname[tm.tm_mon],
194 tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec,
Willy Tarreaubaaee002006-06-26 02:48:02 +0200195 progname, pid);
196 /* WARNING: depending upon implementations, snprintf may return
197 * either -1 or the number of bytes that would be needed to store
198 * the total message. In both cases, we must adjust it.
199 */
200 if (hdr_len < 0 || hdr_len > sizeof(logmsg))
201 hdr_len = sizeof(logmsg);
202
203 dataptr = logmsg + hdr_len;
204 }
205
206 va_start(argp, message);
Willy Tarreau8d5d7f22007-01-21 19:16:41 +0100207 /*
208 * FIXME: we take a huge performance hit here. We might have to replace
209 * vsnprintf() for a hard-coded log writer.
210 */
Willy Tarreaubaaee002006-06-26 02:48:02 +0200211 data_len = vsnprintf(dataptr, logmsg + sizeof(logmsg) - dataptr, message, argp);
212 if (data_len < 0 || data_len > (logmsg + sizeof(logmsg) - dataptr))
213 data_len = logmsg + sizeof(logmsg) - dataptr;
214 va_end(argp);
215 dataptr[data_len - 1] = '\n'; /* force a break on ultra-long lines */
216
217 if (p == NULL) {
218 if (global.logfac1 >= 0) {
Robert Tsai81ae1952007-12-05 10:47:29 +0100219 logsrvs[nbloggers] = &global.logsrv1;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200220 facilities[nbloggers] = global.logfac1;
221 loglevel[nbloggers] = global.loglev1;
Willy Tarreauf7edefa2009-05-10 17:20:05 +0200222 minlvl[nbloggers] = global.minlvl1;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200223 nbloggers++;
224 }
225 if (global.logfac2 >= 0) {
Robert Tsai81ae1952007-12-05 10:47:29 +0100226 logsrvs[nbloggers] = &global.logsrv2;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200227 facilities[nbloggers] = global.logfac2;
228 loglevel[nbloggers] = global.loglev2;
Willy Tarreauf7edefa2009-05-10 17:20:05 +0200229 minlvl[nbloggers] = global.minlvl2;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200230 nbloggers++;
231 }
232 } else {
233 if (p->logfac1 >= 0) {
Robert Tsai81ae1952007-12-05 10:47:29 +0100234 logsrvs[nbloggers] = &p->logsrv1;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200235 facilities[nbloggers] = p->logfac1;
236 loglevel[nbloggers] = p->loglev1;
Willy Tarreauf7edefa2009-05-10 17:20:05 +0200237 minlvl[nbloggers] = p->minlvl1;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200238 nbloggers++;
239 }
240 if (p->logfac2 >= 0) {
Robert Tsai81ae1952007-12-05 10:47:29 +0100241 logsrvs[nbloggers] = &p->logsrv2;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200242 facilities[nbloggers] = p->logfac2;
243 loglevel[nbloggers] = p->loglev2;
Willy Tarreauf7edefa2009-05-10 17:20:05 +0200244 minlvl[nbloggers] = p->minlvl2;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200245 nbloggers++;
246 }
Robert Tsai81ae1952007-12-05 10:47:29 +0100247 }
248
249 /* Lazily set up syslog sockets for protocol families of configured
250 * syslog servers. */
251 for (nblogger = 0; nblogger < nbloggers; nblogger++) {
252 const struct logsrv *logsrv = logsrvs[nblogger];
253 int proto, *plogfd;
254 if (logsrv->u.addr.sa_family == AF_UNIX) {
255 proto = 0;
256 plogfd = &logfdunix;
257 } else {
258 /* sa_family == AF_INET */
259 proto = IPPROTO_UDP;
260 plogfd = &logfdinet;
261 }
262 if (*plogfd >= 0) {
263 /* socket already created. */
264 continue;
265 }
266 if ((*plogfd = socket(logsrv->u.addr.sa_family, SOCK_DGRAM,
267 proto)) < 0) {
268 Alert("socket for logger #%d failed: %s (errno=%d)\n",
269 nblogger + 1, strerror(errno), errno);
270 return;
271 }
272 /* we don't want to receive anything on this socket */
273 setsockopt(*plogfd, SOL_SOCKET, SO_RCVBUF, &zero, sizeof(zero));
274 /* does nothing under Linux, maybe needed for others */
275 shutdown(*plogfd, SHUT_RD);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200276 }
277
Robert Tsai81ae1952007-12-05 10:47:29 +0100278 /* Send log messages to syslog server. */
279 for (nblogger = 0; nblogger < nbloggers; nblogger++) {
280 const struct logsrv *logsrv = logsrvs[nblogger];
281 int *plogfd = logsrv->u.addr.sa_family == AF_UNIX ?
282 &logfdunix : &logfdinet;
283 int sent;
284
Willy Tarreaubaaee002006-06-26 02:48:02 +0200285 /* we can filter the level of the messages that are sent to each logger */
Robert Tsai81ae1952007-12-05 10:47:29 +0100286 if (level > loglevel[nblogger])
Willy Tarreaubaaee002006-06-26 02:48:02 +0200287 continue;
288
289 /* For each target, we may have a different facility.
290 * We can also have a different log level for each message.
291 * This induces variations in the message header length.
292 * Since we don't want to recompute it each time, nor copy it every
293 * time, we only change the facility in the pre-computed header,
294 * and we change the pointer to the header accordingly.
295 */
Willy Tarreauf7edefa2009-05-10 17:20:05 +0200296 fac_level = (facilities[nblogger] << 3) + MAX(level, minlvl[nblogger]);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200297 log_ptr = logmsg + 3; /* last digit of the log level */
298 do {
299 *log_ptr = '0' + fac_level % 10;
300 fac_level /= 10;
301 log_ptr--;
302 } while (fac_level && log_ptr > logmsg);
303 *log_ptr = '<';
304
305 /* the total syslog message now starts at logptr, for dataptr+data_len-logptr */
Robert Tsai81ae1952007-12-05 10:47:29 +0100306 sent = sendto(*plogfd, log_ptr, dataptr + data_len - log_ptr,
307 MSG_DONTWAIT | MSG_NOSIGNAL, &logsrv->u.addr, logsrv_addrlen(logsrv));
308 if (sent < 0) {
309 Alert("sendto logger #%d failed: %s (errno=%d)\n",
310 nblogger, strerror(errno), errno);
311 }
Willy Tarreaubaaee002006-06-26 02:48:02 +0200312 }
313}
314
315
316/*
317 * send a log for the session when we have enough info about it
318 */
Willy Tarreau42250582007-04-01 01:30:43 +0200319void tcp_sess_log(struct session *s)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200320{
Cyril Bontéacd7d632010-11-01 19:26:02 +0100321 char pn[INET6_ADDRSTRLEN];
Willy Tarreau73de9892006-11-30 11:40:23 +0100322 struct proxy *fe = s->fe;
Willy Tarreauddb358d2006-12-17 22:55:52 +0100323 struct proxy *be = s->be;
324 struct proxy *prx_log;
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200325 int tolog, level, err;
Willy Tarreau42250582007-04-01 01:30:43 +0200326 char *svid;
Willy Tarreaufe944602007-10-25 10:34:16 +0200327 struct tm tm;
Willy Tarreaubaaee002006-06-26 02:48:02 +0200328
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200329 /* if we don't want to log normal traffic, return now */
Willy Tarreauee28de02010-06-01 09:51:00 +0200330 err = (s->flags & (SN_ERR_MASK | SN_REDISP)) || (s->req->cons->conn_retries != be->conn_retries);
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200331 if (!err && (fe->options2 & PR_O2_NOLOGNORM))
332 return;
333
Willy Tarreaubaaee002006-06-26 02:48:02 +0200334 if (s->cli_addr.ss_family == AF_INET)
335 inet_ntop(AF_INET,
336 (const void *)&((struct sockaddr_in *)&s->cli_addr)->sin_addr,
337 pn, sizeof(pn));
Emeric Brun4ab92622010-10-22 16:14:31 +0200338 else if (s->cli_addr.ss_family == AF_INET6)
Willy Tarreaubaaee002006-06-26 02:48:02 +0200339 inet_ntop(AF_INET6,
340 (const void *)&((struct sockaddr_in6 *)(&s->cli_addr))->sin6_addr,
341 pn, sizeof(pn));
342
Willy Tarreaufe944602007-10-25 10:34:16 +0200343 get_localtime(s->logs.tv_accept.tv_sec, &tm);
Willy Tarreauddb358d2006-12-17 22:55:52 +0100344
Willy Tarreaue7ded1f2009-08-09 10:11:45 +0200345 if (fe->logfac1 < 0 && fe->logfac2 < 0)
346 return;
Willy Tarreauddb358d2006-12-17 22:55:52 +0100347
Willy Tarreaue7ded1f2009-08-09 10:11:45 +0200348 prx_log = fe;
Willy Tarreau42250582007-04-01 01:30:43 +0200349 tolog = fe->to_log;
350 svid = (tolog & LW_SVID) ? (s->srv != NULL) ? s->srv->id : "<NOSRV>" : "-";
Willy Tarreaubaaee002006-06-26 02:48:02 +0200351
Willy Tarreauc9bd0cc2009-05-10 11:57:02 +0200352 level = LOG_INFO;
353 if (err && (fe->options2 & PR_O2_LOGERRORS))
354 level = LOG_ERR;
355
356 send_log(prx_log, level, "%s:%d [%02d/%s/%04d:%02d:%02d:%02d.%03d]"
Willy Tarreau1772ece2009-04-03 14:49:12 +0200357 " %s %s/%s %ld/%ld/%s%ld %s%lld"
358 " %c%c %d/%d/%d/%d/%s%u %ld/%ld\n",
Emeric Brun4ab92622010-10-22 16:14:31 +0200359 s->cli_addr.ss_family == AF_UNIX ? "unix" : pn,
360 s->cli_addr.ss_family == AF_UNIX ? s->listener->luid : (ntohs((s->cli_addr.ss_family == AF_INET) ?
361 ((struct sockaddr_in *)&s->cli_addr)->sin_port :
362 ((struct sockaddr_in6 *)&s->cli_addr)->sin6_port)),
Willy Tarreaufe944602007-10-25 10:34:16 +0200363 tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
Willy Tarreau1772ece2009-04-03 14:49:12 +0200364 tm.tm_hour, tm.tm_min, tm.tm_sec, (int)s->logs.tv_accept.tv_usec/1000,
Willy Tarreau42250582007-04-01 01:30:43 +0200365 fe->id, be->id, svid,
366 (s->logs.t_queue >= 0) ? s->logs.t_queue : -1,
367 (s->logs.t_connect >= 0) ? s->logs.t_connect - s->logs.t_queue : -1,
368 (tolog & LW_BYTES) ? "" : "+", s->logs.t_close,
Willy Tarreau8b3977f2008-01-18 11:16:32 +0100369 (tolog & LW_BYTES) ? "" : "+", s->logs.bytes_out,
Willy Tarreau42250582007-04-01 01:30:43 +0200370 sess_term_cond[(s->flags & SN_ERR_MASK) >> SN_ERR_SHIFT],
371 sess_fin_state[(s->flags & SN_FINST_MASK) >> SN_FINST_SHIFT],
372 actconn, fe->feconn, be->beconn, s->srv ? s->srv->cur_sess : 0,
Krzysztof Piotr Oledzki25b501a2008-01-06 16:36:16 +0100373 (s->flags & SN_REDISP)?"+":"",
Willy Tarreauee28de02010-06-01 09:51:00 +0200374 (s->req->cons->conn_retries>0)?(be->conn_retries - s->req->cons->conn_retries):be->conn_retries,
Willy Tarreau42250582007-04-01 01:30:43 +0200375 s->logs.srv_queue_size, s->logs.prx_queue_size);
Willy Tarreaubaaee002006-06-26 02:48:02 +0200376
377 s->logs.logwait = 0;
378}
379
Willy Tarreaubaaee002006-06-26 02:48:02 +0200380
381/*
382 * Local variables:
383 * c-indent-level: 8
384 * c-basic-offset: 8
385 * End:
386 */