1 /* $NetBSD: syslogd.c,v 1.95 2008/12/29 03:45:23 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993, 1994\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94"; 41 #else 42 __RCSID("$NetBSD: syslogd.c,v 1.95 2008/12/29 03:45:23 christos Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 /* 47 * syslogd -- log system messages 48 * 49 * This program implements a system log. It takes a series of lines. 50 * Each line may have a priority, signified as "<n>" as 51 * the first characters of the line. If this is 52 * not present, a default priority is used. 53 * 54 * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will 55 * cause it to reread its configuration file. 56 * 57 * Defined Constants: 58 * 59 * MAXLINE -- the maximimum line length that can be handled. 60 * DEFUPRI -- the default priority for user messages 61 * DEFSPRI -- the default priority for kernel messages 62 * 63 * Author: Eric Allman 64 * extensive changes by Ralph Campbell 65 * more extensive changes by Eric Allman (again) 66 * Extension to log by program name as well as facility and priority 67 * by Peter da Silva. 68 * -U and -v by Harlan Stenn. 69 * Priority comparison code by Harlan Stenn. 70 * TLS, syslog-protocol, and syslog-sign code by Martin Schuette. 71 */ 72 #define SYSLOG_NAMES 73 #include "syslogd.h" 74 #include "extern.h" 75 76 #ifndef DISABLE_SIGN 77 #include "sign.h" 78 struct sign_global_t GlobalSign = { 79 .rsid = 0, 80 .sig2_delims = STAILQ_HEAD_INITIALIZER(GlobalSign.sig2_delims) 81 }; 82 #endif /* !DISABLE_SIGN */ 83 84 #ifndef DISABLE_TLS 85 #include "tls.h" 86 #endif /* !DISABLE_TLS */ 87 88 #ifdef LIBWRAP 89 int allow_severity = LOG_AUTH|LOG_INFO; 90 int deny_severity = LOG_AUTH|LOG_WARNING; 91 #endif 92 93 const char *ConfFile = _PATH_LOGCONF; 94 char ctty[] = _PATH_CONSOLE; 95 96 /* 97 * Queue of about-to-be-dead processes we should watch out for. 98 */ 99 TAILQ_HEAD(, deadq_entry) deadq_head = TAILQ_HEAD_INITIALIZER(deadq_head); 100 101 typedef struct deadq_entry { 102 pid_t dq_pid; 103 int dq_timeout; 104 TAILQ_ENTRY(deadq_entry) dq_entries; 105 } *dq_t; 106 107 /* 108 * The timeout to apply to processes waiting on the dead queue. Unit 109 * of measure is "mark intervals", i.e. 20 minutes by default. 110 * Processes on the dead queue will be terminated after that time. 111 */ 112 #define DQ_TIMO_INIT 2 113 114 /* 115 * Intervals at which we flush out "message repeated" messages, 116 * in seconds after previous message is logged. After each flush, 117 * we move to the next interval until we reach the largest. 118 */ 119 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ 120 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) 121 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) 122 #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \ 123 (f)->f_repeatcount = MAXREPEAT; \ 124 } 125 126 /* values for f_type */ 127 #define F_UNUSED 0 /* unused entry */ 128 #define F_FILE 1 /* regular file */ 129 #define F_TTY 2 /* terminal */ 130 #define F_CONSOLE 3 /* console terminal */ 131 #define F_FORW 4 /* remote machine */ 132 #define F_USERS 5 /* list of users */ 133 #define F_WALL 6 /* everyone logged on */ 134 #define F_PIPE 7 /* pipe to program */ 135 #define F_TLS 8 136 137 struct TypeInfo { 138 const char *name; 139 char *queue_length_string; 140 const char *default_length_string; 141 char *queue_size_string; 142 const char *default_size_string; 143 int64_t queue_length; 144 int64_t queue_size; 145 int max_msg_length; 146 } TypeInfo[] = { 147 /* numeric values are set in init() 148 * -1 in length/size or max_msg_length means infinite */ 149 {"UNUSED", NULL, "0", NULL, "0", 0, 0, 0}, 150 {"FILE", NULL, "1024", NULL, "1M", 0, 0, 16384}, 151 {"TTY", NULL, "0", NULL, "0", 0, 0, 1024}, 152 {"CONSOLE", NULL, "0", NULL, "0", 0, 0, 1024}, 153 {"FORW", NULL, "0", NULL, "1M", 0, 0, 16384}, 154 {"USERS", NULL, "0", NULL, "0", 0, 0, 1024}, 155 {"WALL", NULL, "0", NULL, "0", 0, 0, 1024}, 156 {"PIPE", NULL, "1024", NULL, "1M", 0, 0, 16384}, 157 #ifndef DISABLE_TLS 158 {"TLS", NULL, "-1", NULL, "16M", 0, 0, 16384} 159 #endif /* !DISABLE_TLS */ 160 }; 161 162 struct filed *Files = NULL; 163 struct filed consfile; 164 165 time_t now; 166 int Debug = D_NONE; /* debug flag */ 167 int daemonized = 0; /* we are not daemonized yet */ 168 char *LocalFQDN = NULL; /* our FQDN */ 169 char *oldLocalFQDN = NULL; /* our previous FQDN */ 170 char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */ 171 struct socketEvent *finet; /* Internet datagram sockets and events */ 172 int *funix; /* Unix domain datagram sockets */ 173 #ifndef DISABLE_TLS 174 struct socketEvent *TLS_Listen_Set; /* TLS/TCP sockets and events */ 175 #endif /* !DISABLE_TLS */ 176 int Initialized = 0; /* set when we have initialized ourselves */ 177 int ShuttingDown; /* set when we die() */ 178 int MarkInterval = 20 * 60; /* interval between marks in seconds */ 179 int MarkSeq = 0; /* mark sequence number */ 180 int SecureMode = 0; /* listen only on unix domain socks */ 181 int UseNameService = 1; /* make domain name queries */ 182 int NumForwards = 0; /* number of forwarding actions in conf file */ 183 char **LogPaths; /* array of pathnames to read messages from */ 184 int NoRepeat = 0; /* disable "repeated"; log always */ 185 int RemoteAddDate = 0; /* always add date to messages from network */ 186 int SyncKernel = 0; /* write kernel messages synchronously */ 187 int UniquePriority = 0; /* only log specified priority */ 188 int LogFacPri = 0; /* put facility and priority in log messages: */ 189 /* 0=no, 1=numeric, 2=names */ 190 bool BSDOutputFormat = true; /* if true emit traditional BSD Syslog lines, 191 * otherwise new syslog-protocol lines 192 * 193 * Open Issue: having a global flag is the 194 * easiest solution. If we get a more detailed 195 * config file this could/should be changed 196 * into a destination-specific flag. 197 * Most output code should be ready to handle 198 * this, it will only break some syslog-sign 199 * configurations (e.g. with SG="0"). 200 */ 201 char appname[] = "syslogd";/* the APPNAME for own messages */ 202 char *include_pid = NULL; /* include PID in own messages */ 203 204 205 /* init and setup */ 206 void usage(void) __attribute__((__noreturn__)); 207 void logpath_add(char ***, int *, int *, const char *); 208 void logpath_fileadd(char ***, int *, int *, const char *); 209 void init(int fd, short event, void *ev); /* SIGHUP kevent dispatch routine */ 210 struct socketEvent* 211 socksetup(int, const char *); 212 int getmsgbufsize(void); 213 char *getLocalFQDN(void); 214 void trim_anydomain(char *); 215 /* pipe & subprocess handling */ 216 int p_open(char *, pid_t *); 217 void deadq_enter(pid_t, const char *); 218 int deadq_remove(pid_t); 219 void log_deadchild(pid_t, int, const char *); 220 void reapchild(int fd, short event, void *ev); /* SIGCHLD kevent dispatch routine */ 221 /* input message parsing & formatting */ 222 const char *cvthname(struct sockaddr_storage *); 223 void printsys(char *); 224 struct buf_msg *printline_syslogprotocol(const char*, char*, int, int); 225 struct buf_msg *printline_bsdsyslog(const char*, char*, int, int); 226 struct buf_msg *printline_kernelprintf(const char*, char*, int, int); 227 size_t check_timestamp(unsigned char *, char **, bool, bool); 228 char *copy_utf8_ascii(char*, size_t); 229 uint_fast32_t get_utf8_value(const char*); 230 unsigned valid_utf8(const char *); 231 static unsigned check_sd(char*); 232 static unsigned check_msgid(char *); 233 /* event handling */ 234 static void dispatch_read_klog(int fd, short event, void *ev); 235 static void dispatch_read_finet(int fd, short event, void *ev); 236 static void dispatch_read_funix(int fd, short event, void *ev); 237 static void domark(int fd, short event, void *ev); /* timer kevent dispatch routine */ 238 /* log messages */ 239 void logmsg_async(int, const char *, const char *, int); 240 void logmsg(struct buf_msg *); 241 int matches_spec(const char *, const char *, 242 char *(*)(const char *, const char *)); 243 void udp_send(struct filed *, char *, size_t); 244 void wallmsg(struct filed *, struct iovec *, size_t); 245 /* buffer & queue functions */ 246 size_t message_queue_purge(struct filed *f, size_t, int); 247 size_t message_allqueues_check(void); 248 static struct buf_queue * 249 find_qentry_to_delete(const struct buf_queue_head *, int, bool); 250 struct buf_queue * 251 message_queue_add(struct filed *, struct buf_msg *); 252 size_t buf_queue_obj_size(struct buf_queue*); 253 /* configuration & parsing */ 254 void cfline(size_t, const char *, struct filed *, const char *, 255 const char *); 256 void read_config_file(FILE*, struct filed**); 257 void store_sign_delim_sg2(char*); 258 int decode(const char *, CODE *); 259 bool copy_config_value(const char *, char **, const char **, 260 const char *, int); 261 bool copy_config_value_word(char **, const char **); 262 263 /* config parsing */ 264 #ifndef DISABLE_TLS 265 void free_cred_SLIST(struct peer_cred_head *); 266 static inline void 267 free_incoming_tls_sockets(void); 268 #endif /* !DISABLE_TLS */ 269 270 /* for make_timestamp() */ 271 #define TIMESTAMPBUFSIZE 35 272 char timestamp[TIMESTAMPBUFSIZE]; 273 274 /* 275 * Global line buffer. Since we only process one event at a time, 276 * a global one will do. 277 */ 278 char *linebuf; 279 size_t linebufsize; 280 281 static const char *bindhostname = NULL; 282 283 #ifndef DISABLE_TLS 284 struct TLS_Incoming TLS_Incoming_Head = \ 285 SLIST_HEAD_INITIALIZER(TLS_Incoming_Head); 286 extern char *SSL_ERRCODE[]; 287 struct tls_global_options_t tls_opt; 288 #endif /* !DISABLE_TLS */ 289 290 int 291 main(int argc, char *argv[]) 292 { 293 int ch, j, fklog; 294 int funixsize = 0, funixmaxsize = 0; 295 struct sockaddr_un sunx; 296 char **pp; 297 struct event *ev; 298 uid_t uid = 0; 299 gid_t gid = 0; 300 char *user = NULL; 301 char *group = NULL; 302 const char *root = "/"; 303 char *endp; 304 struct group *gr; 305 struct passwd *pw; 306 unsigned long l; 307 308 /* should we set LC_TIME="C" to ensure correct timestamps&parsing? */ 309 (void)setlocale(LC_ALL, ""); 310 311 while ((ch = getopt(argc, argv, "b:dnsSf:m:o:p:P:ru:g:t:TUv")) != -1) 312 switch(ch) { 313 case 'b': 314 bindhostname = optarg; 315 break; 316 case 'd': /* debug */ 317 Debug = D_DEFAULT; 318 /* is there a way to read the integer value 319 * for Debug as an optional argument? */ 320 break; 321 case 'f': /* configuration file */ 322 ConfFile = optarg; 323 break; 324 case 'g': 325 group = optarg; 326 if (*group == '\0') 327 usage(); 328 break; 329 case 'm': /* mark interval */ 330 MarkInterval = atoi(optarg) * 60; 331 break; 332 case 'n': /* turn off DNS queries */ 333 UseNameService = 0; 334 break; 335 case 'o': /* message format */ 336 if (!strncmp(optarg, "rfc3164", sizeof("rfc3164")-1)) 337 BSDOutputFormat = true; 338 else if (!strncmp(optarg, "syslog", sizeof("syslog")-1)) 339 BSDOutputFormat = false; 340 else 341 usage(); 342 /* TODO: implement additional output option "osyslog" 343 * for old syslogd behaviour as introduced after 344 * FreeBSD PR#bin/7055. 345 */ 346 break; 347 case 'p': /* path */ 348 logpath_add(&LogPaths, &funixsize, 349 &funixmaxsize, optarg); 350 break; 351 case 'P': /* file of paths */ 352 logpath_fileadd(&LogPaths, &funixsize, 353 &funixmaxsize, optarg); 354 break; 355 case 'r': /* disable "repeated" compression */ 356 NoRepeat++; 357 break; 358 case 's': /* no network listen mode */ 359 SecureMode++; 360 break; 361 case 'S': 362 SyncKernel = 1; 363 break; 364 case 't': 365 root = optarg; 366 if (*root == '\0') 367 usage(); 368 break; 369 case 'T': 370 RemoteAddDate = 1; 371 break; 372 case 'u': 373 user = optarg; 374 if (*user == '\0') 375 usage(); 376 break; 377 case 'U': /* only log specified priority */ 378 UniquePriority = 1; 379 break; 380 case 'v': /* log facility and priority */ 381 if (LogFacPri < 2) 382 LogFacPri++; 383 break; 384 default: 385 usage(); 386 } 387 if ((argc -= optind) != 0) 388 usage(); 389 390 setlinebuf(stdout); 391 tzset(); /* init TZ information for localtime. */ 392 393 if (user != NULL) { 394 if (isdigit((unsigned char)*user)) { 395 errno = 0; 396 endp = NULL; 397 l = strtoul(user, &endp, 0); 398 if (errno || *endp != '\0') 399 goto getuser; 400 uid = (uid_t)l; 401 if (uid != l) {/* TODO: never executed */ 402 errno = 0; 403 logerror("UID out of range"); 404 die(0, 0, NULL); 405 } 406 } else { 407 getuser: 408 if ((pw = getpwnam(user)) != NULL) { 409 uid = pw->pw_uid; 410 } else { 411 errno = 0; 412 logerror("Cannot find user `%s'", user); 413 die(0, 0, NULL); 414 } 415 } 416 } 417 418 if (group != NULL) { 419 if (isdigit((unsigned char)*group)) { 420 errno = 0; 421 endp = NULL; 422 l = strtoul(group, &endp, 0); 423 if (errno || *endp != '\0') 424 goto getgroup; 425 gid = (gid_t)l; 426 if (gid != l) {/* TODO: never executed */ 427 errno = 0; 428 logerror("GID out of range"); 429 die(0, 0, NULL); 430 } 431 } else { 432 getgroup: 433 if ((gr = getgrnam(group)) != NULL) { 434 gid = gr->gr_gid; 435 } else { 436 errno = 0; 437 logerror("Cannot find group `%s'", group); 438 die(0, 0, NULL); 439 } 440 } 441 } 442 443 if (access(root, F_OK | R_OK)) { 444 logerror("Cannot access `%s'", root); 445 die(0, 0, NULL); 446 } 447 448 consfile.f_type = F_CONSOLE; 449 (void)strlcpy(consfile.f_un.f_fname, ctty, 450 sizeof(consfile.f_un.f_fname)); 451 linebufsize = getmsgbufsize(); 452 if (linebufsize < MAXLINE) 453 linebufsize = MAXLINE; 454 linebufsize++; 455 456 if (!(linebuf = malloc(linebufsize))) { 457 logerror("Couldn't allocate buffer"); 458 die(0, 0, NULL); 459 } 460 461 #ifndef SUN_LEN 462 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 463 #endif 464 if (funixsize == 0) 465 logpath_add(&LogPaths, &funixsize, 466 &funixmaxsize, _PATH_LOG); 467 funix = (int *)malloc(sizeof(int) * funixsize); 468 if (funix == NULL) { 469 logerror("Couldn't allocate funix descriptors"); 470 die(0, 0, NULL); 471 } 472 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 473 DPRINTF(D_NET, "Making unix dgram socket `%s'\n", *pp); 474 unlink(*pp); 475 memset(&sunx, 0, sizeof(sunx)); 476 sunx.sun_family = AF_LOCAL; 477 (void)strncpy(sunx.sun_path, *pp, sizeof(sunx.sun_path)); 478 funix[j] = socket(AF_LOCAL, SOCK_DGRAM, 0); 479 if (funix[j] < 0 || bind(funix[j], 480 (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 || 481 chmod(*pp, 0666) < 0) { 482 logerror("Cannot create `%s'", *pp); 483 die(0, 0, NULL); 484 } 485 DPRINTF(D_NET, "Listening on unix dgram socket `%s'\n", *pp); 486 } 487 488 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) < 0) { 489 DPRINTF(D_FILE, "Can't open `%s' (%d)\n", _PATH_KLOG, errno); 490 } else { 491 DPRINTF(D_FILE, "Listening on kernel log `%s' with fd %d\n", 492 _PATH_KLOG, fklog); 493 } 494 495 #if (!defined(DISABLE_TLS) && !defined(DISABLE_SIGN)) 496 /* basic OpenSSL init */ 497 SSL_load_error_strings(); 498 (void) SSL_library_init(); 499 OpenSSL_add_all_digests(); 500 /* OpenSSL PRNG needs /dev/urandom, thus initialize before chroot() */ 501 if (!RAND_status()) 502 logerror("Unable to initialize OpenSSL PRNG"); 503 else { 504 DPRINTF(D_TLS, "Initializing PRNG\n"); 505 } 506 #endif /* (!defined(DISABLE_TLS) && !defined(DISABLE_SIGN)) */ 507 #ifndef DISABLE_SIGN 508 /* initialize rsid -- we will use that later to determine 509 * whether sign_global_init() was already called */ 510 GlobalSign.rsid = 0; 511 #endif /* !DISABLE_SIGN */ 512 #if (IETF_NUM_PRIVALUES != (LOG_NFACILITIES<<3)) 513 logerror("Warning: system defines %d priority values, but " 514 "syslog-protocol/syslog-sign specify %d values", 515 LOG_NFACILITIES, SIGN_NUM_PRIVALS); 516 #endif 517 518 /* 519 * All files are open, we can drop privileges and chroot 520 */ 521 DPRINTF(D_MISC, "Attempt to chroot to `%s'\n", root); 522 if (chroot(root)) { 523 logerror("Failed to chroot to `%s'", root); 524 die(0, 0, NULL); 525 } 526 DPRINTF(D_MISC, "Attempt to set GID/EGID to `%d'\n", gid); 527 if (setgid(gid) || setegid(gid)) { 528 logerror("Failed to set gid to `%d'", gid); 529 die(0, 0, NULL); 530 } 531 DPRINTF(D_MISC, "Attempt to set UID/EUID to `%d'\n", uid); 532 if (setuid(uid) || seteuid(uid)) { 533 logerror("Failed to set uid to `%d'", uid); 534 die(0, 0, NULL); 535 } 536 /* 537 * We cannot detach from the terminal before we are sure we won't 538 * have a fatal error, because error message would not go to the 539 * terminal and would not be logged because syslogd dies. 540 * All die() calls are behind us, we can call daemon() 541 */ 542 if (!Debug) { 543 (void)daemon(0, 0); 544 daemonized = 1; 545 /* tuck my process id away, if i'm not in debug mode */ 546 #ifdef __NetBSD_Version__ 547 pidfile(NULL); 548 #endif /* __NetBSD_Version__ */ 549 } 550 551 #define MAX_PID_LEN 5 552 include_pid = malloc(MAX_PID_LEN+1); 553 snprintf(include_pid, MAX_PID_LEN+1, "%d", getpid()); 554 555 /* 556 * Create the global kernel event descriptor. 557 * 558 * NOTE: We MUST do this after daemon(), bacause the kqueue() 559 * API dictates that kqueue descriptors are not inherited 560 * across forks (lame!). 561 */ 562 (void)event_init(); 563 564 /* 565 * We must read the configuration file for the first time 566 * after the kqueue descriptor is created, because we install 567 * events during this process. 568 */ 569 init(0, 0, NULL); 570 571 /* 572 * Always exit on SIGTERM. Also exit on SIGINT and SIGQUIT 573 * if we're debugging. 574 */ 575 (void)signal(SIGTERM, SIG_IGN); 576 (void)signal(SIGINT, SIG_IGN); 577 (void)signal(SIGQUIT, SIG_IGN); 578 579 ev = allocev(); 580 signal_set(ev, SIGTERM, die, ev); 581 EVENT_ADD(ev); 582 583 if (Debug) { 584 ev = allocev(); 585 signal_set(ev, SIGINT, die, ev); 586 EVENT_ADD(ev); 587 ev = allocev(); 588 signal_set(ev, SIGQUIT, die, ev); 589 EVENT_ADD(ev); 590 } 591 592 ev = allocev(); 593 signal_set(ev, SIGCHLD, reapchild, ev); 594 EVENT_ADD(ev); 595 596 ev = allocev(); 597 schedule_event(&ev, 598 &((struct timeval){TIMERINTVL, 0}), 599 domark, ev); 600 601 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */ 602 603 /* Re-read configuration on SIGHUP. */ 604 (void) signal(SIGHUP, SIG_IGN); 605 ev = allocev(); 606 signal_set(ev, SIGHUP, init, ev); 607 EVENT_ADD(ev); 608 609 #ifndef DISABLE_TLS 610 ev = allocev(); 611 signal_set(ev, SIGUSR1, dispatch_force_tls_reconnect, ev); 612 EVENT_ADD(ev); 613 #endif /* !DISABLE_TLS */ 614 615 if (fklog >= 0) { 616 ev = allocev(); 617 DPRINTF(D_EVENT, 618 "register klog for fd %d with ev@%p\n", fklog, ev); 619 event_set(ev, fklog, EV_READ | EV_PERSIST, 620 dispatch_read_klog, ev); 621 EVENT_ADD(ev); 622 } 623 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 624 ev = allocev(); 625 event_set(ev, funix[j], EV_READ | EV_PERSIST, 626 dispatch_read_funix, ev); 627 EVENT_ADD(ev); 628 } 629 630 DPRINTF(D_MISC, "Off & running....\n"); 631 632 j = event_dispatch(); 633 /* normal termination via die(), reaching this is an error */ 634 DPRINTF(D_MISC, "event_dispatch() returned %d\n", j); 635 die(0, 0, NULL); 636 /*NOTREACHED*/ 637 return 0; 638 } 639 640 void 641 usage(void) 642 { 643 644 (void)fprintf(stderr, 645 "usage: %s [-dnrSsTUv] [-b bind_address] [-f config_file] [-g group]\n" 646 "\t[-m mark_interval] [-P file_list] [-p log_socket\n" 647 "\t[-p log_socket2 ...]] [-t chroot_dir] [-u user]\n", 648 getprogname()); 649 exit(1); 650 } 651 652 /* 653 * Dispatch routine for reading /dev/klog 654 * 655 * Note: slightly different semantic in dispatch_read functions: 656 * - read_klog() might give multiple messages in linebuf and 657 * leaves the task of splitting them to printsys() 658 * - all other read functions receive one message and 659 * then call printline() with one buffer. 660 */ 661 static void 662 dispatch_read_klog(int fd, short event, void *ev) 663 { 664 ssize_t rv; 665 666 DPRINTF((D_CALL|D_EVENT), "Kernel log active (%d, %d, %p)" 667 " with linebuf@%p, length %zu)\n", fd, event, ev, 668 linebuf, linebufsize); 669 670 rv = read(fd, linebuf, linebufsize - 1); 671 if (rv > 0) { 672 linebuf[rv] = '\0'; 673 printsys(linebuf); 674 } else if (rv < 0 && errno != EINTR) { 675 /* 676 * /dev/klog has croaked. Disable the event 677 * so it won't bother us again. 678 */ 679 logerror("klog failed"); 680 event_del(ev); 681 } 682 } 683 684 /* 685 * Dispatch routine for reading Unix domain sockets. 686 */ 687 static void 688 dispatch_read_funix(int fd, short event, void *ev) 689 { 690 struct sockaddr_un myname, fromunix; 691 ssize_t rv; 692 socklen_t sunlen; 693 694 sunlen = sizeof(myname); 695 if (getsockname(fd, (struct sockaddr *)&myname, &sunlen) != 0) { 696 /* 697 * This should never happen, so ensure that it doesn't 698 * happen again. 699 */ 700 logerror("getsockname() unix failed"); 701 event_del(ev); 702 return; 703 } 704 705 DPRINTF((D_CALL|D_EVENT|D_NET), "Unix socket (%.*s) active (%d, %d %p)" 706 " with linebuf@%p, size %zu)\n", (int)(myname.sun_len 707 - sizeof(myname.sun_len) - sizeof(myname.sun_family)), 708 myname.sun_path, fd, event, ev, linebuf, linebufsize-1); 709 710 sunlen = sizeof(fromunix); 711 rv = recvfrom(fd, linebuf, linebufsize-1, 0, 712 (struct sockaddr *)&fromunix, &sunlen); 713 if (rv > 0) { 714 linebuf[rv] = '\0'; 715 printline(LocalFQDN, linebuf, 0); 716 } else if (rv < 0 && errno != EINTR) { 717 logerror("recvfrom() unix `%.*s'", 718 myname.sun_len, myname.sun_path); 719 } 720 } 721 722 /* 723 * Dispatch routine for reading Internet sockets. 724 */ 725 static void 726 dispatch_read_finet(int fd, short event, void *ev) 727 { 728 #ifdef LIBWRAP 729 struct request_info req; 730 #endif 731 struct sockaddr_storage frominet; 732 ssize_t rv; 733 socklen_t len; 734 int reject = 0; 735 736 DPRINTF((D_CALL|D_EVENT|D_NET), "inet socket active (%d, %d %p) " 737 " with linebuf@%p, size %zu)\n", 738 fd, event, ev, linebuf, linebufsize-1); 739 740 #ifdef LIBWRAP 741 request_init(&req, RQ_DAEMON, appname, RQ_FILE, fd, NULL); 742 fromhost(&req); 743 reject = !hosts_access(&req); 744 if (reject) 745 DPRINTF(D_NET, "access denied\n"); 746 #endif 747 748 len = sizeof(frominet); 749 rv = recvfrom(fd, linebuf, linebufsize-1, 0, 750 (struct sockaddr *)&frominet, &len); 751 if (rv == 0 || (rv < 0 && errno == EINTR)) 752 return; 753 else if (rv < 0) { 754 logerror("recvfrom inet"); 755 return; 756 } 757 758 linebuf[rv] = '\0'; 759 if (!reject) 760 printline(cvthname(&frominet), linebuf, 761 RemoteAddDate ? ADDDATE : 0); 762 } 763 764 /* 765 * given a pointer to an array of char *'s, a pointer to its current 766 * size and current allocated max size, and a new char * to add, add 767 * it, update everything as necessary, possibly allocating a new array 768 */ 769 void 770 logpath_add(char ***lp, int *szp, int *maxszp, const char *new) 771 { 772 char **nlp; 773 int newmaxsz; 774 775 DPRINTF(D_FILE, "Adding `%s' to the %p logpath list\n", new, *lp); 776 if (*szp == *maxszp) { 777 if (*maxszp == 0) { 778 newmaxsz = 4; /* start of with enough for now */ 779 *lp = NULL; 780 } else 781 newmaxsz = *maxszp * 2; 782 nlp = realloc(*lp, sizeof(char *) * (newmaxsz + 1)); 783 if (nlp == NULL) { 784 logerror("Couldn't allocate line buffer"); 785 die(0, 0, NULL); 786 } 787 *lp = nlp; 788 *maxszp = newmaxsz; 789 } 790 if (((*lp)[(*szp)++] = strdup(new)) == NULL) { 791 logerror("Couldn't allocate logpath"); 792 die(0, 0, NULL); 793 } 794 (*lp)[(*szp)] = NULL; /* always keep it NULL terminated */ 795 } 796 797 /* do a file of log sockets */ 798 void 799 logpath_fileadd(char ***lp, int *szp, int *maxszp, const char *file) 800 { 801 FILE *fp; 802 char *line; 803 size_t len; 804 805 fp = fopen(file, "r"); 806 if (fp == NULL) { 807 logerror("Could not open socket file list `%s'", file); 808 die(0, 0, NULL); 809 } 810 811 while ((line = fgetln(fp, &len)) != NULL) { 812 line[len - 1] = 0; 813 logpath_add(lp, szp, maxszp, line); 814 } 815 fclose(fp); 816 } 817 818 /* 819 * checks UTF-8 codepoint 820 * returns either its length in bytes or 0 if *input is invalid 821 */ 822 unsigned 823 valid_utf8(const char *c) { 824 unsigned rc, nb; 825 826 /* first byte gives sequence length */ 827 if ((*c & 0x80) == 0x00) return 1; /* 0bbbbbbb -- ASCII */ 828 else if ((*c & 0xc0) == 0x80) return 0; /* 10bbbbbb -- trailing byte */ 829 else if ((*c & 0xe0) == 0xc0) nb = 2; /* 110bbbbb */ 830 else if ((*c & 0xf0) == 0xe0) nb = 3; /* 1110bbbb */ 831 else if ((*c & 0xf8) == 0xf0) nb = 4; /* 11110bbb */ 832 else return 0; /* UTF-8 allows only up to 4 bytes */ 833 834 /* catch overlong encodings */ 835 if ((*c & 0xfe) == 0xc0) 836 return 0; /* 1100000b ... */ 837 else if (((*c & 0xff) == 0xe0) && ((*(c+1) & 0xe0) == 0x80)) 838 return 0; /* 11100000 100bbbbb ... */ 839 else if (((*c & 0xff) == 0xf0) && ((*(c+1) & 0xf0) == 0x80)) 840 return 0; /* 11110000 1000bbbb ... ... */ 841 842 /* and also filter UTF-16 surrogates (=invalid in UTF-8) */ 843 if (((*c & 0xff) == 0xed) && ((*(c+1) & 0xe0) == 0xa0)) 844 return 0; /* 11101101 101bbbbb ... */ 845 846 rc = nb; 847 /* check trailing bytes */ 848 switch (nb) { 849 default: return 0; 850 case 4: if ((*(c+3) & 0xc0) != 0x80) return 0; /*FALLTHROUGH*/ 851 case 3: if ((*(c+2) & 0xc0) != 0x80) return 0; /*FALLTHROUGH*/ 852 case 2: if ((*(c+1) & 0xc0) != 0x80) return 0; /*FALLTHROUGH*/ 853 } 854 return rc; 855 } 856 #define UTF8CHARMAX 4 857 858 /* 859 * read UTF-8 value 860 * returns a the codepoint number 861 */ 862 uint_fast32_t 863 get_utf8_value(const char *c) { 864 uint_fast32_t sum; 865 unsigned nb, i; 866 867 /* first byte gives sequence length */ 868 if ((*c & 0x80) == 0x00) return *c;/* 0bbbbbbb -- ASCII */ 869 else if ((*c & 0xc0) == 0x80) return 0; /* 10bbbbbb -- trailing byte */ 870 else if ((*c & 0xe0) == 0xc0) { /* 110bbbbb */ 871 nb = 2; 872 sum = (*c & ~0xe0) & 0xff; 873 } else if ((*c & 0xf0) == 0xe0) { /* 1110bbbb */ 874 nb = 3; 875 sum = (*c & ~0xf0) & 0xff; 876 } else if ((*c & 0xf8) == 0xf0) { /* 11110bbb */ 877 nb = 4; 878 sum = (*c & ~0xf8) & 0xff; 879 } else return 0; /* UTF-8 allows only up to 4 bytes */ 880 881 /* check trailing bytes -- 10bbbbbb */ 882 i = 1; 883 while (i < nb) { 884 sum <<= 6; 885 sum |= ((*(c+i) & ~0xc0) & 0xff); 886 i++; 887 } 888 return sum; 889 } 890 891 /* note previous versions transscribe 892 * control characters, e.g. \007 --> "^G" 893 * did anyone rely on that? 894 * 895 * this new version works on only one buffer and 896 * replaces control characters with a space 897 */ 898 #define NEXTFIELD(ptr) if (*(p) == ' ') (p)++; /* SP */ \ 899 else { \ 900 DPRINTF(D_DATA, "format error\n"); \ 901 if (*(p) == '\0') start = (p); \ 902 goto all_syslog_msg; \ 903 } 904 #define FORCE2ASCII(c) ((iscntrl((unsigned char)(c)) && (c) != '\t') \ 905 ? ((c) == '\n' ? ' ' : '?') \ 906 : (c) & 0177) 907 908 /* following syslog-protocol */ 909 #define printusascii(ch) (ch >= 33 && ch <= 126) 910 #define sdname(ch) (ch != '=' && ch != ' ' \ 911 && ch != ']' && ch != '"' \ 912 && printusascii(ch)) 913 914 /* checks whether the first word of string p can be interpreted as 915 * a syslog-protocol MSGID and if so returns its length. 916 * 917 * otherwise returns 0 918 */ 919 static unsigned 920 check_msgid(char *p) 921 { 922 char *q = p; 923 924 /* consider the NILVALUE to be valid */ 925 if (*q == '-' && *(q+1) == ' ') 926 return 1; 927 928 for (;;) { 929 if (*q == ' ') 930 return q - p; 931 else if (*q == '\0' || !printusascii(*q) || q - p >= MSGID_MAX) 932 return 0; 933 else 934 q++; 935 } 936 } 937 938 /* 939 * returns number of chars found in SD at beginning of string p 940 * thus returns 0 if no valid SD is found 941 * 942 * if ascii == true then substitute all non-ASCII chars 943 * otherwise use syslog-protocol rules to allow UTF-8 in values 944 * note: one pass for filtering and scanning, so a found SD 945 * is always filtered, but an invalid one could be partially 946 * filtered up to the format error. 947 */ 948 static unsigned 949 check_sd(char* p) 950 { 951 char *q = p; 952 bool esc = false; 953 954 /* consider the NILVALUE to be valid */ 955 if (*q == '-' && (*(q+1) == ' ' || *(q+1) == '\0')) 956 return 1; 957 958 for(;;) { /* SD-ELEMENT */ 959 if (*q++ != '[') return 0; 960 /* SD-ID */ 961 if (!sdname(*q)) return 0; 962 while (sdname(*q)) { 963 *q = FORCE2ASCII(*q); 964 q++; 965 } 966 for(;;) { /* SD-PARAM */ 967 if (*q == ']') { 968 q++; 969 if (*q == ' ' || *q == '\0') return q - p; 970 else if (*q == '[') break; 971 } else if (*q++ != ' ') return 0; 972 973 /* PARAM-NAME */ 974 if (!sdname(*q)) return 0; 975 while (sdname(*q)) { 976 *q = FORCE2ASCII(*q); 977 q++; 978 } 979 980 if (*q++ != '=') return 0; 981 if (*q++ != '"') return 0; 982 983 for(;;) { /* PARAM-VALUE */ 984 if (esc) { 985 esc = false; 986 if (*q == '\\' || *q == '"' || 987 *q == ']') { 988 q++; 989 continue; 990 } 991 /* no else because invalid 992 * escape sequences are accepted */ 993 } 994 else if (*q == '"') break; 995 else if (*q == '\0' || *q == ']') return 0; 996 else if (*q == '\\') esc = true; 997 else { 998 int i; 999 i = valid_utf8(q); 1000 if (i == 0) 1001 *q = '?'; 1002 else if (i == 1) 1003 *q = FORCE2ASCII(*q); 1004 else /* multi byte char */ 1005 q += (i-1); 1006 } 1007 q++; 1008 } 1009 q++; 1010 } 1011 } 1012 } 1013 1014 struct buf_msg * 1015 printline_syslogprotocol(const char *hname, char *msg, 1016 int flags, int pri) 1017 { 1018 struct buf_msg *buffer; 1019 char *p, *start; 1020 unsigned sdlen = 0, i = 0; 1021 bool utf8allowed = false; /* for some fields */ 1022 1023 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_syslogprotocol(" 1024 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1025 1026 buffer = buf_msg_new(0); 1027 p = msg; 1028 p += check_timestamp((unsigned char*) p, 1029 &buffer->timestamp, true, !BSDOutputFormat); 1030 DPRINTF(D_DATA, "Got timestamp \"%s\"\n", buffer->timestamp); 1031 1032 if (flags & ADDDATE) { 1033 FREEPTR(buffer->timestamp); 1034 buffer->timestamp = strdup(make_timestamp(NULL, 1035 !BSDOutputFormat)); 1036 } 1037 1038 start = p; 1039 NEXTFIELD(p); 1040 /* extract host */ 1041 for (start = p;; p++) { 1042 if ((*p == ' ' || *p == '\0') 1043 && start == p-1 && *(p-1) == '-') { 1044 /* NILVALUE */ 1045 break; 1046 } else if ((*p == ' ' || *p == '\0') 1047 && (start != p-1 || *(p-1) != '-')) { 1048 buffer->host = strndup(start, p - start); 1049 break; 1050 } else { 1051 *p = FORCE2ASCII(*p); 1052 } 1053 } 1054 /* p @ SP after host */ 1055 DPRINTF(D_DATA, "Got host \"%s\"\n", buffer->host); 1056 1057 /* extract app-name */ 1058 NEXTFIELD(p); 1059 for (start = p;; p++) { 1060 if ((*p == ' ' || *p == '\0') 1061 && start == p-1 && *(p-1) == '-') { 1062 /* NILVALUE */ 1063 break; 1064 } else if ((*p == ' ' || *p == '\0') 1065 && (start != p-1 || *(p-1) != '-')) { 1066 buffer->prog = strndup(start, p - start); 1067 break; 1068 } else { 1069 *p = FORCE2ASCII(*p); 1070 } 1071 } 1072 DPRINTF(D_DATA, "Got prog \"%s\"\n", buffer->prog); 1073 1074 /* extract procid */ 1075 NEXTFIELD(p); 1076 for (start = p;; p++) { 1077 if ((*p == ' ' || *p == '\0') 1078 && start == p-1 && *(p-1) == '-') { 1079 /* NILVALUE */ 1080 break; 1081 } else if ((*p == ' ' || *p == '\0') 1082 && (start != p-1 || *(p-1) != '-')) { 1083 buffer->pid = strndup(start, p - start); 1084 start = p; 1085 break; 1086 } else { 1087 *p = FORCE2ASCII(*p); 1088 } 1089 } 1090 DPRINTF(D_DATA, "Got pid \"%s\"\n", buffer->pid); 1091 1092 /* extract msgid */ 1093 NEXTFIELD(p); 1094 for (start = p;; p++) { 1095 if ((*p == ' ' || *p == '\0') 1096 && start == p-1 && *(p-1) == '-') { 1097 /* NILVALUE */ 1098 start = p+1; 1099 break; 1100 } else if ((*p == ' ' || *p == '\0') 1101 && (start != p-1 || *(p-1) != '-')) { 1102 buffer->msgid = strndup(start, p - start); 1103 start = p+1; 1104 break; 1105 } else { 1106 *p = FORCE2ASCII(*p); 1107 } 1108 } 1109 DPRINTF(D_DATA, "Got msgid \"%s\"\n", buffer->msgid); 1110 1111 /* extract SD */ 1112 NEXTFIELD(p); 1113 start = p; 1114 sdlen = check_sd(p); 1115 DPRINTF(D_DATA, "check_sd(\"%s\") returned %d\n", p, sdlen); 1116 1117 if (sdlen == 1 && *p == '-') { 1118 /* NILVALUE */ 1119 p++; 1120 } else if (sdlen > 1) { 1121 buffer->sd = strndup(p, sdlen); 1122 p += sdlen; 1123 } else { 1124 DPRINTF(D_DATA, "format error\n"); 1125 } 1126 if (*p == '\0') start = p; 1127 else if (*p == ' ') start = ++p; /* SP */ 1128 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1129 1130 /* and now the message itself 1131 * note: move back to last start to check for BOM 1132 */ 1133 all_syslog_msg: 1134 p = start; 1135 1136 /* check for UTF-8-BOM */ 1137 if (IS_BOM(p)) { 1138 DPRINTF(D_DATA, "UTF-8 BOM\n"); 1139 utf8allowed = true; 1140 p += 3; 1141 } 1142 1143 if (*p != '\0' && !utf8allowed) { 1144 size_t msglen; 1145 1146 msglen = strlen(p); 1147 assert(!buffer->msg); 1148 buffer->msg = copy_utf8_ascii(p, msglen); 1149 buffer->msgorig = buffer->msg; 1150 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1151 } else if (*p != '\0' && utf8allowed) { 1152 while (*p != '\0') { 1153 i = valid_utf8(p); 1154 if (i == 0) 1155 *p++ = '?'; 1156 else if (i == 1) 1157 *p = FORCE2ASCII(*p); 1158 p += i; 1159 } 1160 assert(p != start); 1161 assert(!buffer->msg); 1162 buffer->msg = strndup(start, p - start); 1163 buffer->msgorig = buffer->msg; 1164 buffer->msglen = buffer->msgsize = 1 + p - start; 1165 } 1166 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1167 1168 buffer->recvhost = strdup(hname); 1169 buffer->pri = pri; 1170 buffer->flags = flags; 1171 1172 return buffer; 1173 } 1174 1175 /* copies an input into a new ASCII buffer 1176 * ASCII controls are converted to format "^X" 1177 * multi-byte UTF-8 chars are converted to format "<ab><cd>" 1178 */ 1179 #define INIT_BUFSIZE 512 1180 char * 1181 copy_utf8_ascii(char *p, size_t p_len) 1182 { 1183 size_t idst = 0, isrc = 0, dstsize = INIT_BUFSIZE, i; 1184 char *dst, *tmp_dst; 1185 1186 MALLOC(dst, dstsize); 1187 while (isrc < p_len) { 1188 if (dstsize < idst + 10) { 1189 /* check for enough space for \0 and a UTF-8 1190 * conversion; longest possible is <U+123456> */ 1191 tmp_dst = realloc(dst, dstsize + INIT_BUFSIZE); 1192 if (!tmp_dst) 1193 break; 1194 dst = tmp_dst; 1195 dstsize += INIT_BUFSIZE; 1196 } 1197 1198 i = valid_utf8(&p[isrc]); 1199 if (i == 0) { /* invalid encoding */ 1200 dst[idst++] = '?'; 1201 isrc++; 1202 } else if (i == 1) { /* check printable */ 1203 if (iscntrl((unsigned char)p[isrc]) 1204 && p[isrc] != '\t') { 1205 if (p[isrc] == '\n') { 1206 dst[idst++] = ' '; 1207 isrc++; 1208 } else { 1209 dst[idst++] = '^'; 1210 dst[idst++] = p[isrc++] ^ 0100; 1211 } 1212 } else 1213 dst[idst++] = p[isrc++]; 1214 } else { /* convert UTF-8 to ASCII */ 1215 dst[idst++] = '<'; 1216 idst += snprintf(&dst[idst], dstsize - idst, "U+%x", 1217 get_utf8_value(&p[isrc])); 1218 isrc += i; 1219 dst[idst++] = '>'; 1220 } 1221 } 1222 dst[idst] = '\0'; 1223 1224 /* shrink buffer to right size */ 1225 tmp_dst = realloc(dst, idst+1); 1226 if (tmp_dst) 1227 return tmp_dst; 1228 else 1229 return dst; 1230 } 1231 1232 struct buf_msg * 1233 printline_bsdsyslog(const char *hname, char *msg, 1234 int flags, int pri) 1235 { 1236 struct buf_msg *buffer; 1237 char *p, *start; 1238 unsigned msgidlen = 0, sdlen = 0; 1239 1240 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_bsdsyslog(" 1241 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1242 1243 buffer = buf_msg_new(0); 1244 p = msg; 1245 p += check_timestamp((unsigned char*) p, 1246 &buffer->timestamp, false, !BSDOutputFormat); 1247 DPRINTF(D_DATA, "Got timestamp \"%s\"\n", buffer->timestamp); 1248 1249 if (flags & ADDDATE || !buffer->timestamp) { 1250 FREEPTR(buffer->timestamp); 1251 buffer->timestamp = strdup(make_timestamp(NULL, 1252 !BSDOutputFormat)); 1253 } 1254 1255 if (*p == ' ') p++; /* SP */ 1256 else goto all_bsd_msg; 1257 /* in any error case we skip header parsing and 1258 * treat all following data as message content */ 1259 1260 /* extract host */ 1261 for (start = p;; p++) { 1262 if (*p == ' ' || *p == '\0') { 1263 buffer->host = strndup(start, p - start); 1264 break; 1265 } else if (*p == '[' || (*p == ':' 1266 && (*(p+1) == ' ' || *(p+1) == '\0'))) { 1267 /* no host in message */ 1268 buffer->host = LocalFQDN; 1269 buffer->prog = strndup(start, p - start); 1270 break; 1271 } else { 1272 *p = FORCE2ASCII(*p); 1273 } 1274 } 1275 DPRINTF(D_DATA, "Got host \"%s\"\n", buffer->host); 1276 /* p @ SP after host, or @ :/[ after prog */ 1277 1278 /* extract program */ 1279 if (!buffer->prog) { 1280 if (*p == ' ') p++; /* SP */ 1281 else goto all_bsd_msg; 1282 1283 for (start = p;; p++) { 1284 if (*p == ' ' || *p == '\0') { /* error */ 1285 goto all_bsd_msg; 1286 } else if (*p == '[' || (*p == ':' 1287 && (*(p+1) == ' ' || *(p+1) == '\0'))) { 1288 buffer->prog = strndup(start, p - start); 1289 break; 1290 } else { 1291 *p = FORCE2ASCII(*p); 1292 } 1293 } 1294 } 1295 DPRINTF(D_DATA, "Got prog \"%s\"\n", buffer->prog); 1296 start = p; 1297 1298 /* p @ :/[ after prog */ 1299 if (*p == '[') { 1300 p++; 1301 if (*p == ' ') p++; /* SP */ 1302 for (start = p;; p++) { 1303 if (*p == ' ' || *p == '\0') { /* error */ 1304 goto all_bsd_msg; 1305 } else if (*p == ']') { 1306 buffer->pid = strndup(start, p - start); 1307 break; 1308 } else { 1309 *p = FORCE2ASCII(*p); 1310 } 1311 } 1312 } 1313 DPRINTF(D_DATA, "Got pid \"%s\"\n", buffer->pid); 1314 1315 if (*p == ']') p++; 1316 if (*p == ':') p++; 1317 if (*p == ' ') p++; 1318 1319 /* p @ msgid, @ opening [ of SD or @ first byte of message 1320 * accept either case and try to detect MSGID and SD fields 1321 * 1322 * only limitation: we do not accept UTF-8 data in 1323 * BSD Syslog messages -- so all SD values are ASCII-filtered 1324 * 1325 * I have found one scenario with 'unexpected' behaviour: 1326 * if there is only a SD intended, but a) it is short enough 1327 * to be a MSGID and b) the first word of the message can also 1328 * be parsed as an SD. 1329 * example: 1330 * "<35>Jul 6 12:39:08 tag[123]: [exampleSDID@0] - hello" 1331 * --> parsed as 1332 * MSGID = "[exampleSDID@0]" 1333 * SD = "-" 1334 * MSG = "hello" 1335 */ 1336 start = p; 1337 msgidlen = check_msgid(p); 1338 if (msgidlen) /* check for SD in 2nd field */ 1339 sdlen = check_sd(p+msgidlen+1); 1340 1341 if (msgidlen && sdlen) { 1342 /* MSGID in 1st and SD in 2nd field 1343 * now check for NILVALUEs and copy */ 1344 if (msgidlen == 1 && *p == '-') { 1345 p++; /* - */ 1346 p++; /* SP */ 1347 DPRINTF(D_DATA, "Got MSGID \"-\"\n"); 1348 } else { 1349 /* only has ASCII chars after check_msgid() */ 1350 buffer->msgid = strndup(p, msgidlen); 1351 p += msgidlen; 1352 p++; /* SP */ 1353 DPRINTF(D_DATA, "Got MSGID \"%s\"\n", 1354 buffer->msgid); 1355 } 1356 } else { 1357 /* either no msgid or no SD in 2nd field 1358 * --> check 1st field for SD */ 1359 DPRINTF(D_DATA, "No MSGID\n"); 1360 sdlen = check_sd(p); 1361 } 1362 1363 if (sdlen == 0) { 1364 DPRINTF(D_DATA, "No SD\n"); 1365 } else if (sdlen > 1) { 1366 buffer->sd = copy_utf8_ascii(p, sdlen); 1367 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1368 } else if (sdlen == 1 && *p == '-') { 1369 p++; 1370 DPRINTF(D_DATA, "Got SD \"-\"\n"); 1371 } else { 1372 DPRINTF(D_DATA, "Error\n"); 1373 } 1374 1375 if (*p == ' ') p++; 1376 start = p; 1377 /* and now the message itself 1378 * note: do not reset start, because we might come here 1379 * by goto and want to have the incomplete field as part 1380 * of the msg 1381 */ 1382 all_bsd_msg: 1383 if (*p != '\0') { 1384 size_t msglen = strlen(p); 1385 buffer->msg = copy_utf8_ascii(p, msglen); 1386 buffer->msgorig = buffer->msg; 1387 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1388 } 1389 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1390 1391 buffer->recvhost = strdup(hname); 1392 buffer->pri = pri; 1393 buffer->flags = flags | BSDSYSLOG; 1394 1395 return buffer; 1396 } 1397 1398 struct buf_msg * 1399 printline_kernelprintf(const char *hname, char *msg, 1400 int flags, int pri) 1401 { 1402 struct buf_msg *buffer; 1403 char *p; 1404 unsigned sdlen = 0; 1405 1406 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_kernelprintf(" 1407 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1408 1409 buffer = buf_msg_new(0); 1410 buffer->timestamp = strdup(make_timestamp(NULL, !BSDOutputFormat)); 1411 buffer->pri = pri; 1412 buffer->flags = flags; 1413 1414 /* assume there is no MSGID but there might be SD */ 1415 p = msg; 1416 sdlen = check_sd(p); 1417 1418 if (sdlen == 0) { 1419 DPRINTF(D_DATA, "No SD\n"); 1420 } else if (sdlen > 1) { 1421 buffer->sd = copy_utf8_ascii(p, sdlen); 1422 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1423 } else if (sdlen == 1 && *p == '-') { 1424 p++; 1425 DPRINTF(D_DATA, "Got SD \"-\"\n"); 1426 } else { 1427 DPRINTF(D_DATA, "Error\n"); 1428 } 1429 1430 if (*p == ' ') p++; 1431 if (*p != '\0') { 1432 size_t msglen = strlen(p); 1433 buffer->msg = copy_utf8_ascii(p, msglen); 1434 buffer->msgorig = buffer->msg; 1435 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1436 } 1437 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1438 1439 return buffer; 1440 } 1441 1442 /* 1443 * Take a raw input line, read priority and version, call the 1444 * right message parsing function, then call logmsg(). 1445 */ 1446 void 1447 printline(const char *hname, char *msg, int flags) 1448 { 1449 struct buf_msg *buffer; 1450 int pri; 1451 char *p, *q; 1452 long n; 1453 bool bsdsyslog = true; 1454 1455 DPRINTF((D_CALL|D_BUFFER|D_DATA), 1456 "printline(\"%s\", \"%s\", %d)\n", hname, msg, flags); 1457 1458 /* test for special codes */ 1459 pri = DEFUPRI; 1460 p = msg; 1461 if (*p == '<') { 1462 errno = 0; 1463 n = strtol(p + 1, &q, 10); 1464 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { 1465 p = q + 1; 1466 pri = (int)n; 1467 /* check for syslog-protocol version */ 1468 if (*p == '1' && p[1] == ' ') { 1469 p += 2; /* skip version and space */ 1470 bsdsyslog = false; 1471 } else { 1472 bsdsyslog = true; 1473 } 1474 } 1475 } 1476 if (pri & ~(LOG_FACMASK|LOG_PRIMASK)) 1477 pri = DEFUPRI; 1478 1479 /* 1480 * Don't allow users to log kernel messages. 1481 * NOTE: Since LOG_KERN == 0, this will also match 1482 * messages with no facility specified. 1483 */ 1484 if ((pri & LOG_FACMASK) == LOG_KERN) 1485 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); 1486 1487 if (bsdsyslog) { 1488 buffer = printline_bsdsyslog(hname, p, flags, pri); 1489 } else { 1490 buffer = printline_syslogprotocol(hname, p, flags, pri); 1491 } 1492 logmsg(buffer); 1493 DELREF(buffer); 1494 } 1495 1496 /* 1497 * Take a raw input line from /dev/klog, split and format similar to syslog(). 1498 */ 1499 void 1500 printsys(char *msg) 1501 { 1502 int n, is_printf, pri, flags; 1503 char *p, *q; 1504 struct buf_msg *buffer; 1505 1506 for (p = msg; *p != '\0'; ) { 1507 bool bsdsyslog = true; 1508 1509 is_printf = 1; 1510 flags = ISKERNEL | ADDDATE | BSDSYSLOG; 1511 if (SyncKernel) 1512 flags |= SYNC_FILE; 1513 if (is_printf) /* kernel printf's come out on console */ 1514 flags |= IGN_CONS; 1515 pri = DEFSPRI; 1516 1517 if (*p == '<') { 1518 errno = 0; 1519 n = (int)strtol(p + 1, &q, 10); 1520 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { 1521 p = q + 1; 1522 is_printf = 0; 1523 pri = n; 1524 if (*p == '1') { /* syslog-protocol version */ 1525 p += 2; /* skip version and space */ 1526 bsdsyslog = false; 1527 } else { 1528 bsdsyslog = true; 1529 } 1530 } 1531 } 1532 for (q = p; *q != '\0' && *q != '\n'; q++) 1533 /* look for end of line; no further checks. 1534 * trust the kernel to send ASCII only */; 1535 if (*q != '\0') 1536 *q++ = '\0'; 1537 1538 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 1539 pri = DEFSPRI; 1540 1541 /* allow all kinds of input from kernel */ 1542 if (is_printf) 1543 buffer = printline_kernelprintf( 1544 LocalFQDN, p, flags, pri); 1545 else { 1546 if (bsdsyslog) 1547 buffer = printline_bsdsyslog( 1548 LocalFQDN, p, flags, pri); 1549 else 1550 buffer = printline_syslogprotocol( 1551 LocalFQDN, p, flags, pri); 1552 } 1553 1554 /* set fields left open */ 1555 if (!buffer->prog) 1556 buffer->prog = strdup(_PATH_UNIX); 1557 if (!buffer->host) 1558 buffer->host = LocalFQDN; 1559 if (!buffer->recvhost) 1560 buffer->recvhost = LocalFQDN; 1561 1562 logmsg(buffer); 1563 DELREF(buffer); 1564 p = q; 1565 } 1566 } 1567 1568 /* 1569 * Check to see if `name' matches the provided specification, using the 1570 * specified strstr function. 1571 */ 1572 int 1573 matches_spec(const char *name, const char *spec, 1574 char *(*check)(const char *, const char *)) 1575 { 1576 const char *s; 1577 const char *cursor; 1578 char prev, next; 1579 size_t len; 1580 1581 if (name[0] == '\0') 1582 return 0; 1583 1584 if (strchr(name, ',')) /* sanity */ 1585 return 0; 1586 1587 len = strlen(name); 1588 cursor = spec; 1589 while ((s = (*check)(cursor, name)) != NULL) { 1590 prev = s == spec ? ',' : *(s - 1); 1591 cursor = s + len; 1592 next = *cursor; 1593 1594 if (prev == ',' && (next == '\0' || next == ',')) 1595 return 1; 1596 } 1597 1598 return 0; 1599 } 1600 1601 /* 1602 * wrapper with old function signature, 1603 * keeps calling code shorter and hides buffer allocation 1604 */ 1605 void 1606 logmsg_async(int pri, const char *sd, const char *msg, int flags) 1607 { 1608 struct buf_msg *buffer; 1609 size_t msglen; 1610 1611 DPRINTF((D_CALL|D_DATA), "logmsg_async(%d, \"%s\", \"%s\", %d)\n", 1612 pri, sd, msg, flags); 1613 1614 if (msg) { 1615 msglen = strlen(msg); 1616 msglen++; /* adds \0 */ 1617 buffer = buf_msg_new(msglen); 1618 buffer->msglen = strlcpy(buffer->msg, msg, msglen) + 1; 1619 } else { 1620 buffer = buf_msg_new(0); 1621 } 1622 if (sd) buffer->sd = strdup(sd); 1623 buffer->timestamp = strdup(make_timestamp(NULL, !BSDOutputFormat)); 1624 buffer->prog = appname; 1625 buffer->pid = include_pid; 1626 buffer->recvhost = buffer->host = LocalFQDN; 1627 buffer->pri = pri; 1628 buffer->flags = flags; 1629 1630 logmsg(buffer); 1631 DELREF(buffer); 1632 } 1633 1634 /* read timestamp in from_buf, convert into a timestamp in to_buf 1635 * 1636 * returns length of timestamp found in from_buf (= number of bytes consumed) 1637 */ 1638 size_t 1639 check_timestamp(unsigned char *from_buf, char **to_buf, 1640 bool from_iso, bool to_iso) 1641 { 1642 unsigned char *q; 1643 int p; 1644 bool found_ts = false; 1645 1646 DPRINTF((D_CALL|D_DATA), "check_timestamp(%p = \"%s\", from_iso=%d, " 1647 "to_iso=%d)\n", from_buf, from_buf, from_iso, to_iso); 1648 1649 if (!from_buf) return 0; 1650 /* 1651 * Check to see if msg looks non-standard. 1652 * looks at every char because we do not have a msg length yet 1653 */ 1654 /* detailed checking adapted from Albert Mietus' sl_timestamp.c */ 1655 if (from_iso) { 1656 if (from_buf[4] == '-' && from_buf[7] == '-' 1657 && from_buf[10] == 'T' && from_buf[13] == ':' 1658 && from_buf[16] == ':' 1659 && isdigit(from_buf[0]) && isdigit(from_buf[1]) 1660 && isdigit(from_buf[2]) && isdigit(from_buf[3]) /* YYYY */ 1661 && isdigit(from_buf[5]) && isdigit(from_buf[6]) 1662 && isdigit(from_buf[8]) && isdigit(from_buf[9]) /* mm dd */ 1663 && isdigit(from_buf[11]) && isdigit(from_buf[12]) /* HH */ 1664 && isdigit(from_buf[14]) && isdigit(from_buf[15]) /* MM */ 1665 && isdigit(from_buf[17]) && isdigit(from_buf[18]) /* SS */ 1666 ) { 1667 /* time-secfrac */ 1668 if (from_buf[19] == '.') 1669 for (p=20; isdigit(from_buf[p]); p++) /* NOP*/; 1670 else 1671 p = 19; 1672 /* time-offset */ 1673 if (from_buf[p] == 'Z' 1674 || ((from_buf[p] == '+' || from_buf[p] == '-') 1675 && from_buf[p+3] == ':' 1676 && isdigit(from_buf[p+1]) && isdigit(from_buf[p+2]) 1677 && isdigit(from_buf[p+4]) && isdigit(from_buf[p+5]) 1678 )) 1679 found_ts = true; 1680 } 1681 } else { 1682 if (from_buf[3] == ' ' && from_buf[6] == ' ' 1683 && from_buf[9] == ':' && from_buf[12] == ':' 1684 && (from_buf[4] == ' ' || isdigit(from_buf[4])) 1685 && isdigit(from_buf[5]) /* dd */ 1686 && isdigit(from_buf[7]) && isdigit(from_buf[8]) /* HH */ 1687 && isdigit(from_buf[10]) && isdigit(from_buf[11]) /* MM */ 1688 && isdigit(from_buf[13]) && isdigit(from_buf[14]) /* SS */ 1689 && isupper(from_buf[0]) && islower(from_buf[1]) /* month */ 1690 && islower(from_buf[2])) 1691 found_ts = true; 1692 } 1693 if (!found_ts) { 1694 if (from_buf[0] == '-' && from_buf[1] == ' ') { 1695 /* NILVALUE */ 1696 if (to_iso) { 1697 /* with ISO = syslog-protocol output leave 1698 * it as is, because it is better to have 1699 * no timestamp than a wrong one. 1700 */ 1701 *to_buf = strdup("-"); 1702 } else { 1703 /* with BSD Syslog the field is reqired 1704 * so replace it with current time 1705 */ 1706 *to_buf = strdup(make_timestamp(NULL, false)); 1707 } 1708 return 2; 1709 } 1710 return 0; 1711 } 1712 1713 if (!from_iso && !to_iso) { 1714 /* copy BSD timestamp */ 1715 DPRINTF(D_CALL, "check_timestamp(): copy BSD timestamp\n"); 1716 *to_buf = strndup((char *)from_buf, BSD_TIMESTAMPLEN); 1717 return BSD_TIMESTAMPLEN; 1718 } else if (from_iso && to_iso) { 1719 /* copy ISO timestamp */ 1720 DPRINTF(D_CALL, "check_timestamp(): copy ISO timestamp\n"); 1721 if (!(q = (unsigned char *) strchr((char *)from_buf, ' '))) 1722 q = from_buf + strlen((char *)from_buf); 1723 *to_buf = strndup((char *)from_buf, q - from_buf); 1724 return q - from_buf; 1725 } else if (from_iso && !to_iso) { 1726 /* convert ISO->BSD */ 1727 struct tm parsed; 1728 time_t timeval; 1729 char tsbuf[MAX_TIMESTAMPLEN]; 1730 int i = 0; 1731 1732 DPRINTF(D_CALL, "check_timestamp(): convert ISO->BSD\n"); 1733 for(i = 0; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1734 && from_buf[i] != '.' && from_buf[i] != ' '; i++) 1735 tsbuf[i] = from_buf[i]; /* copy date & time */ 1736 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1737 && from_buf[i] != '+' && from_buf[i] != '-' 1738 && from_buf[i] != 'Z' && from_buf[i] != ' '; i++) 1739 ; /* skip fraction digits */ 1740 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1741 && from_buf[i] != ':' && from_buf[i] != ' ' ; i++) 1742 tsbuf[i] = from_buf[i]; /* copy TZ */ 1743 if (from_buf[i] == ':') i++; /* skip colon */ 1744 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1745 && from_buf[i] != ' ' ; i++) 1746 tsbuf[i] = from_buf[i]; /* copy TZ */ 1747 1748 (void)memset(&parsed, 0, sizeof(parsed)); 1749 parsed.tm_isdst = -1; 1750 (void)strptime(tsbuf, "%FT%T%z", &parsed); 1751 timeval = mktime(&parsed); 1752 1753 *to_buf = strndup(make_timestamp(&timeval, false), 1754 BSD_TIMESTAMPLEN); 1755 return i; 1756 } else if (!from_iso && to_iso) { 1757 /* convert BSD->ISO */ 1758 struct tm parsed; 1759 struct tm *current; 1760 time_t timeval; 1761 char *rc; 1762 1763 (void)memset(&parsed, 0, sizeof(parsed)); 1764 parsed.tm_isdst = -1; 1765 DPRINTF(D_CALL, "check_timestamp(): convert BSD->ISO\n"); 1766 rc = strptime((char *)from_buf, "%b %d %T", &parsed); 1767 current = gmtime(&now); 1768 1769 /* use current year and timezone */ 1770 parsed.tm_isdst = current->tm_isdst; 1771 parsed.tm_gmtoff = current->tm_gmtoff; 1772 parsed.tm_year = current->tm_year; 1773 if (current->tm_mon == 0 && parsed.tm_mon == 11) 1774 parsed.tm_year--; 1775 1776 timeval = mktime(&parsed); 1777 rc = make_timestamp(&timeval, true); 1778 *to_buf = strndup(rc, MAX_TIMESTAMPLEN-1); 1779 1780 return BSD_TIMESTAMPLEN; 1781 } else { 1782 DPRINTF(D_MISC, 1783 "Executing unreachable code in check_timestamp()\n"); 1784 return 0; 1785 } 1786 } 1787 1788 /* 1789 * Log a message to the appropriate log files, users, etc. based on 1790 * the priority. 1791 */ 1792 void 1793 logmsg(struct buf_msg *buffer) 1794 { 1795 struct filed *f; 1796 int fac, omask, prilev; 1797 1798 DPRINTF((D_CALL|D_BUFFER), "logmsg: buffer@%p, pri 0%o/%d, flags 0x%x," 1799 " timestamp \"%s\", from \"%s\", sd \"%s\", msg \"%s\"\n", 1800 buffer, buffer->pri, buffer->pri, buffer->flags, 1801 buffer->timestamp, buffer->recvhost, buffer->sd, buffer->msg); 1802 1803 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM)); 1804 1805 /* sanity check */ 1806 assert(buffer->refcount == 1); 1807 assert(buffer->msglen <= buffer->msgsize); 1808 assert(buffer->msgorig <= buffer->msg); 1809 assert((buffer->msg && buffer->msglen == strlen(buffer->msg)+1) 1810 || (!buffer->msg && !buffer->msglen)); 1811 if (!buffer->msg && !buffer->sd && !buffer->msgid) 1812 DPRINTF(D_BUFFER, "Empty message?\n"); 1813 1814 /* extract facility and priority level */ 1815 if (buffer->flags & MARK) 1816 fac = LOG_NFACILITIES; 1817 else 1818 fac = LOG_FAC(buffer->pri); 1819 prilev = LOG_PRI(buffer->pri); 1820 1821 /* log the message to the particular outputs */ 1822 if (!Initialized) { 1823 f = &consfile; 1824 f->f_file = open(ctty, O_WRONLY, 0); 1825 1826 if (f->f_file >= 0) { 1827 DELREF(f->f_prevmsg); 1828 f->f_prevmsg = NEWREF(buffer); 1829 fprintlog(f, NEWREF(buffer), NULL); 1830 DELREF(buffer); 1831 (void)close(f->f_file); 1832 } 1833 (void)sigsetmask(omask); 1834 return; 1835 } 1836 1837 for (f = Files; f; f = f->f_next) { 1838 /* skip messages that are incorrect priority */ 1839 if (!MATCH_PRI(f, fac, prilev) 1840 || f->f_pmask[fac] == INTERNAL_NOPRI) 1841 continue; 1842 1843 /* skip messages with the incorrect host name */ 1844 /* do we compare with host (IMHO correct) or recvhost */ 1845 /* (compatible)? */ 1846 if (f->f_host != NULL && buffer->host != NULL) { 1847 char shost[MAXHOSTNAMELEN + 1], *h; 1848 if (!BSDOutputFormat) { 1849 h = buffer->host; 1850 } else { 1851 (void)strlcpy(shost, buffer->host, 1852 sizeof(shost)); 1853 trim_anydomain(shost); 1854 h = shost; 1855 } 1856 switch (f->f_host[0]) { 1857 case '+': 1858 if (! matches_spec(h, f->f_host + 1, 1859 strcasestr)) 1860 continue; 1861 break; 1862 case '-': 1863 if (matches_spec(h, f->f_host + 1, 1864 strcasestr)) 1865 continue; 1866 break; 1867 } 1868 } 1869 1870 /* skip messages with the incorrect program name */ 1871 if (f->f_program != NULL && buffer->prog != NULL) { 1872 switch (f->f_program[0]) { 1873 case '+': 1874 if (!matches_spec(buffer->prog, 1875 f->f_program + 1, strstr)) 1876 continue; 1877 break; 1878 case '-': 1879 if (matches_spec(buffer->prog, 1880 f->f_program + 1, strstr)) 1881 continue; 1882 break; 1883 default: 1884 if (!matches_spec(buffer->prog, 1885 f->f_program, strstr)) 1886 continue; 1887 break; 1888 } 1889 } 1890 1891 if (f->f_type == F_CONSOLE && (buffer->flags & IGN_CONS)) 1892 continue; 1893 1894 /* don't output marks to recently written files */ 1895 if ((buffer->flags & MARK) 1896 && (now - f->f_time) < MarkInterval / 2) 1897 continue; 1898 1899 /* 1900 * suppress duplicate lines to this file unless NoRepeat 1901 */ 1902 #define MSG_FIELD_EQ(x) ((!buffer->x && !f->f_prevmsg->x) || \ 1903 (buffer->x && f->f_prevmsg->x && !strcmp(buffer->x, f->f_prevmsg->x))) 1904 1905 if ((buffer->flags & MARK) == 0 && 1906 f->f_prevmsg && 1907 buffer->msglen == f->f_prevmsg->msglen && 1908 !NoRepeat && 1909 MSG_FIELD_EQ(host) && 1910 MSG_FIELD_EQ(sd) && 1911 MSG_FIELD_EQ(msg) 1912 ) { 1913 f->f_prevcount++; 1914 DPRINTF(D_DATA, "Msg repeated %d times, %ld sec of %d\n", 1915 f->f_prevcount, (long)(now - f->f_time), 1916 repeatinterval[f->f_repeatcount]); 1917 /* 1918 * If domark would have logged this by now, 1919 * flush it now (so we don't hold isolated messages), 1920 * but back off so we'll flush less often 1921 * in the future. 1922 */ 1923 if (now > REPEATTIME(f)) { 1924 fprintlog(f, NEWREF(buffer), NULL); 1925 DELREF(buffer); 1926 BACKOFF(f); 1927 } 1928 } else { 1929 /* new line, save it */ 1930 if (f->f_prevcount) 1931 fprintlog(f, NULL, NULL); 1932 f->f_repeatcount = 0; 1933 DELREF(f->f_prevmsg); 1934 f->f_prevmsg = NEWREF(buffer); 1935 fprintlog(f, NEWREF(buffer), NULL); 1936 DELREF(buffer); 1937 } 1938 } 1939 (void)sigsetmask(omask); 1940 } 1941 1942 /* 1943 * format one buffer into output format given by flag BSDOutputFormat 1944 * line is allocated and has to be free()d by caller 1945 * size_t pointers are optional, if not NULL then they will return 1946 * different lenghts used for formatting and output 1947 */ 1948 #define OUT(x) ((x)?(x):"-") 1949 bool 1950 format_buffer(struct buf_msg *buffer, char **line, size_t *ptr_linelen, 1951 size_t *ptr_msglen, size_t *ptr_tlsprefixlen, size_t *ptr_prilen) 1952 { 1953 #define FPBUFSIZE 30 1954 static char ascii_empty[] = ""; 1955 char fp_buf[FPBUFSIZE] = "\0"; 1956 char *hostname, *shorthostname = NULL; 1957 char *ascii_sd = ascii_empty; 1958 char *ascii_msg = ascii_empty; 1959 size_t linelen, msglen, tlsprefixlen, prilen, j; 1960 1961 DPRINTF(D_CALL, "format_buffer(%p)\n", buffer); 1962 if (!buffer) return false; 1963 1964 /* All buffer fields are set with strdup(). To avoid problems 1965 * on memory exhaustion we allow them to be empty and replace 1966 * the essential fields with already allocated generic values. 1967 */ 1968 if (!buffer->timestamp) 1969 buffer->timestamp = timestamp; 1970 if (!buffer->host && !buffer->recvhost) 1971 buffer->host = LocalFQDN; 1972 1973 if (LogFacPri) { 1974 const char *f_s = NULL, *p_s = NULL; 1975 int fac = buffer->pri & LOG_FACMASK; 1976 int pri = LOG_PRI(buffer->pri); 1977 char f_n[5], p_n[5]; 1978 1979 if (LogFacPri > 1) { 1980 CODE *c; 1981 1982 for (c = facilitynames; c->c_name != NULL; c++) { 1983 if (c->c_val == fac) { 1984 f_s = c->c_name; 1985 break; 1986 } 1987 } 1988 for (c = prioritynames; c->c_name != NULL; c++) { 1989 if (c->c_val == pri) { 1990 p_s = c->c_name; 1991 break; 1992 } 1993 } 1994 } 1995 if (f_s == NULL) { 1996 snprintf(f_n, sizeof(f_n), "%d", LOG_FAC(fac)); 1997 f_s = f_n; 1998 } 1999 if (p_s == NULL) { 2000 snprintf(p_n, sizeof(p_n), "%d", pri); 2001 p_s = p_n; 2002 } 2003 snprintf(fp_buf, sizeof(fp_buf), "<%s.%s>", f_s, p_s); 2004 } 2005 2006 /* hostname or FQDN */ 2007 hostname = (buffer->host ? buffer->host : buffer->recvhost); 2008 if (BSDOutputFormat 2009 && (shorthostname = strdup(hostname))) { 2010 /* if the previous BSD output format with "host [recvhost]:" 2011 * gets implemented, this is the right place to distinguish 2012 * between buffer->host and buffer->recvhost 2013 */ 2014 trim_anydomain(shorthostname); 2015 hostname = shorthostname; 2016 } 2017 2018 /* new message formatting: 2019 * instead of using iov always assemble one complete TLS-ready line 2020 * with length and priority (depending on BSDOutputFormat either in 2021 * BSD Syslog or syslog-protocol format) 2022 * 2023 * additionally save the length of the prefixes, 2024 * so UDP destinations can skip the length prefix and 2025 * file/pipe/wall destinations can omit length and priority 2026 */ 2027 /* first determine required space */ 2028 if (BSDOutputFormat) { 2029 /* only output ASCII chars */ 2030 if (buffer->sd) 2031 ascii_sd = copy_utf8_ascii(buffer->sd, 2032 strlen(buffer->sd)); 2033 if (buffer->msg) { 2034 if (IS_BOM(buffer->msg)) 2035 ascii_msg = copy_utf8_ascii(buffer->msg, 2036 buffer->msglen - 1); 2037 else /* assume already converted at input */ 2038 ascii_msg = buffer->msg; 2039 } 2040 msglen = snprintf(NULL, 0, "<%d>%s%.15s %s %s%s%s%s: %s%s%s", 2041 buffer->pri, fp_buf, buffer->timestamp, 2042 hostname, OUT(buffer->prog), 2043 buffer->pid ? "[" : "", 2044 buffer->pid ? buffer->pid : "", 2045 buffer->pid ? "]" : "", ascii_sd, 2046 (buffer->sd && buffer->msg ? " ": ""), ascii_msg); 2047 } else 2048 msglen = snprintf(NULL, 0, "<%d>1 %s%s %s %s %s %s %s%s%s", 2049 buffer->pri, fp_buf, buffer->timestamp, 2050 hostname, OUT(buffer->prog), OUT(buffer->pid), 2051 OUT(buffer->msgid), OUT(buffer->sd), 2052 (buffer->msg ? " ": ""), 2053 (buffer->msg ? buffer->msg: "")); 2054 /* add space for length prefix */ 2055 tlsprefixlen = 0; 2056 for (j = msglen; j; j /= 10) 2057 tlsprefixlen++; 2058 /* one more for the space */ 2059 tlsprefixlen++; 2060 2061 prilen = snprintf(NULL, 0, "<%d>", buffer->pri); 2062 if (!BSDOutputFormat) 2063 prilen += 2; /* version char and space */ 2064 MALLOC(*line, msglen + tlsprefixlen + 1); 2065 if (BSDOutputFormat) 2066 linelen = snprintf(*line, 2067 msglen + tlsprefixlen + 1, 2068 "%zu <%d>%s%.15s %s %s%s%s%s: %s%s%s", 2069 msglen, buffer->pri, fp_buf, buffer->timestamp, 2070 hostname, OUT(buffer->prog), 2071 (buffer->pid ? "[" : ""), 2072 (buffer->pid ? buffer->pid : ""), 2073 (buffer->pid ? "]" : ""), ascii_sd, 2074 (buffer->sd && buffer->msg ? " ": ""), ascii_msg); 2075 else 2076 linelen = snprintf(*line, 2077 msglen + tlsprefixlen + 1, 2078 "%zu <%d>1 %s%s %s %s %s %s %s%s%s", 2079 msglen, buffer->pri, fp_buf, buffer->timestamp, 2080 hostname, OUT(buffer->prog), OUT(buffer->pid), 2081 OUT(buffer->msgid), OUT(buffer->sd), 2082 (buffer->msg ? " ": ""), 2083 (buffer->msg ? buffer->msg: "")); 2084 DPRINTF(D_DATA, "formatted %zu octets to: '%.*s' (linelen %zu, " 2085 "msglen %zu, tlsprefixlen %zu, prilen %zu)\n", linelen, 2086 (int)linelen, *line, linelen, msglen, tlsprefixlen, prilen); 2087 2088 FREEPTR(shorthostname); 2089 if (ascii_sd != ascii_empty) 2090 FREEPTR(ascii_sd); 2091 if (ascii_msg != ascii_empty && ascii_msg != buffer->msg) 2092 FREEPTR(ascii_msg); 2093 2094 if (ptr_linelen) *ptr_linelen = linelen; 2095 if (ptr_msglen) *ptr_msglen = msglen; 2096 if (ptr_tlsprefixlen) *ptr_tlsprefixlen = tlsprefixlen; 2097 if (ptr_prilen) *ptr_prilen = prilen; 2098 return true; 2099 } 2100 2101 /* 2102 * if qentry == NULL: new message, if temporarily undeliverable it will be enqueued 2103 * if qentry != NULL: a temporarily undeliverable message will not be enqueued, 2104 * but after delivery be removed from the queue 2105 */ 2106 void 2107 fprintlog(struct filed *f, struct buf_msg *passedbuffer, struct buf_queue *qentry) 2108 { 2109 static char crnl[] = "\r\n"; 2110 struct buf_msg *buffer = passedbuffer; 2111 struct iovec iov[4]; 2112 struct iovec *v = iov; 2113 bool error = false; 2114 int e = 0, len = 0; 2115 size_t msglen, linelen, tlsprefixlen, prilen; 2116 char *p, *line = NULL, *lineptr = NULL; 2117 #ifndef DISABLE_TLS 2118 bool newhash = false; 2119 #endif 2120 #define REPBUFSIZE 80 2121 char greetings[200]; 2122 #define ADDEV() do { v++; assert(v - iov < A_CNT(iov)); } while(/*CONSTCOND*/0) 2123 2124 DPRINTF(D_CALL, "fprintlog(%p, %p, %p)\n", f, buffer, qentry); 2125 2126 f->f_time = now; 2127 2128 /* increase refcount here and lower again at return. 2129 * this enables the buffer in the else branch to be freed 2130 * --> every branch needs one NEWREF() or buf_msg_new()! */ 2131 if (buffer) { 2132 NEWREF(buffer); 2133 } else { 2134 if (f->f_prevcount > 1) { 2135 /* possible syslog-sign incompatibility: 2136 * assume destinations f1 and f2 share one SG and 2137 * get the same message sequence. 2138 * 2139 * now both f1 and f2 generate "repeated" messages 2140 * "repeated" messages are different due to different 2141 * timestamps 2142 * the SG will get hashes for the two "repeated" messages 2143 * 2144 * now both f1 and f2 are just fine, but a verification 2145 * will report that each 'lost' a message, i.e. the 2146 * other's "repeated" message 2147 * 2148 * conditions for 'safe configurations': 2149 * - use NoRepeat option, 2150 * - use SG 3, or 2151 * - have exactly one destination for every PRI 2152 */ 2153 buffer = buf_msg_new(REPBUFSIZE); 2154 buffer->msglen = snprintf(buffer->msg, REPBUFSIZE, 2155 "last message repeated %d times", f->f_prevcount); 2156 buffer->timestamp = 2157 strdup(make_timestamp(NULL, !BSDOutputFormat)); 2158 buffer->pri = f->f_prevmsg->pri; 2159 buffer->host = LocalFQDN; 2160 buffer->prog = appname; 2161 buffer->pid = include_pid; 2162 2163 } else { 2164 buffer = NEWREF(f->f_prevmsg); 2165 } 2166 } 2167 2168 /* no syslog-sign messages to tty/console/... */ 2169 if ((buffer->flags & SIGN_MSG) 2170 && ((f->f_type == F_UNUSED) 2171 || (f->f_type == F_TTY) 2172 || (f->f_type == F_CONSOLE) 2173 || (f->f_type == F_USERS) 2174 || (f->f_type == F_WALL))) { 2175 DELREF(buffer); 2176 return; 2177 } 2178 2179 /* buffering works only for few types */ 2180 if (qentry 2181 && (f->f_type != F_TLS) 2182 && (f->f_type != F_PIPE) 2183 && (f->f_type != F_FILE)) { 2184 logerror("Warning: unexpected message in buffer"); 2185 DELREF(buffer); 2186 return; 2187 } 2188 2189 if (!format_buffer(buffer, &line, 2190 &linelen, &msglen, &tlsprefixlen, &prilen)) { 2191 DPRINTF(D_CALL, "format_buffer() failed, skip message\n"); 2192 DELREF(buffer); 2193 return; 2194 } 2195 /* assert maximum message length */ 2196 if (TypeInfo[f->f_type].max_msg_length != -1 2197 && TypeInfo[f->f_type].max_msg_length 2198 < linelen - tlsprefixlen - prilen) { 2199 linelen = TypeInfo[f->f_type].max_msg_length 2200 + tlsprefixlen + prilen; 2201 DPRINTF(D_DATA, "truncating oversized message to %zu octets\n", 2202 linelen); 2203 } 2204 2205 #ifndef DISABLE_SIGN 2206 /* keep state between appending the hash (before buffer is sent) 2207 * and possibly sending a SB (after buffer is sent): */ 2208 /* get hash */ 2209 if (!(buffer->flags & SIGN_MSG) && !qentry) { 2210 char *hash = NULL; 2211 struct signature_group_t *sg; 2212 2213 if ((sg = sign_get_sg(buffer->pri, f)) != NULL) { 2214 if (sign_msg_hash(line + tlsprefixlen, &hash)) 2215 newhash = sign_append_hash(hash, sg); 2216 else 2217 DPRINTF(D_SIGN, 2218 "Unable to hash line \"%s\"\n", line); 2219 } 2220 } 2221 #endif /* !DISABLE_SIGN */ 2222 2223 /* set start and length of buffer and/or fill iovec */ 2224 switch (f->f_type) { 2225 case F_UNUSED: 2226 /* nothing */ 2227 break; 2228 case F_TLS: 2229 /* nothing, as TLS uses whole buffer to send */ 2230 lineptr = line; 2231 len = linelen; 2232 break; 2233 case F_FORW: 2234 lineptr = line + tlsprefixlen; 2235 len = linelen - tlsprefixlen; 2236 break; 2237 case F_PIPE: 2238 case F_FILE: /* fallthrough */ 2239 if (f->f_flags & FFLAG_FULL) { 2240 v->iov_base = line + tlsprefixlen; 2241 v->iov_len = linelen - tlsprefixlen; 2242 } else { 2243 v->iov_base = line + tlsprefixlen + prilen; 2244 v->iov_len = linelen - tlsprefixlen - prilen; 2245 } 2246 ADDEV(); 2247 v->iov_base = &crnl[1]; 2248 v->iov_len = 1; 2249 ADDEV(); 2250 break; 2251 case F_CONSOLE: 2252 case F_TTY: 2253 /* filter non-ASCII */ 2254 p = line; 2255 while (*p) { 2256 *p = FORCE2ASCII(*p); 2257 p++; 2258 } 2259 v->iov_base = line + tlsprefixlen + prilen; 2260 v->iov_len = linelen - tlsprefixlen - prilen; 2261 ADDEV(); 2262 v->iov_base = crnl; 2263 v->iov_len = 2; 2264 ADDEV(); 2265 break; 2266 case F_WALL: 2267 v->iov_base = greetings; 2268 v->iov_len = snprintf(greetings, sizeof(greetings), 2269 "\r\n\7Message from syslogd@%s at %s ...\r\n", 2270 (buffer->host ? buffer->host : buffer->recvhost), 2271 buffer->timestamp); 2272 ADDEV(); 2273 case F_USERS: /* fallthrough */ 2274 /* filter non-ASCII */ 2275 p = line; 2276 while (*p) { 2277 *p = FORCE2ASCII(*p); 2278 p++; 2279 } 2280 v->iov_base = line + tlsprefixlen + prilen; 2281 v->iov_len = linelen - tlsprefixlen - prilen; 2282 ADDEV(); 2283 v->iov_base = &crnl[1]; 2284 v->iov_len = 1; 2285 ADDEV(); 2286 break; 2287 } 2288 2289 /* send */ 2290 switch (f->f_type) { 2291 case F_UNUSED: 2292 DPRINTF(D_MISC, "Logging to %s\n", TypeInfo[f->f_type].name); 2293 break; 2294 2295 case F_FORW: 2296 DPRINTF(D_MISC, "Logging to %s %s\n", 2297 TypeInfo[f->f_type].name, f->f_un.f_forw.f_hname); 2298 udp_send(f, lineptr, len); 2299 break; 2300 2301 #ifndef DISABLE_TLS 2302 case F_TLS: 2303 DPRINTF(D_MISC, "Logging to %s %s\n", 2304 TypeInfo[f->f_type].name, 2305 f->f_un.f_tls.tls_conn->hostname); 2306 /* make sure every message gets queued once 2307 * it will be removed when sendmsg is sent and free()d */ 2308 if (!qentry) 2309 qentry = message_queue_add(f, NEWREF(buffer)); 2310 (void)tls_send(f, lineptr, len, qentry); 2311 break; 2312 #endif /* !DISABLE_TLS */ 2313 2314 case F_PIPE: 2315 DPRINTF(D_MISC, "Logging to %s %s\n", 2316 TypeInfo[f->f_type].name, f->f_un.f_pipe.f_pname); 2317 if (f->f_un.f_pipe.f_pid == 0) { 2318 /* (re-)open */ 2319 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname, 2320 &f->f_un.f_pipe.f_pid)) < 0) { 2321 f->f_type = F_UNUSED; 2322 message_queue_freeall(f); 2323 logerror(f->f_un.f_pipe.f_pname); 2324 break; 2325 } else if (!qentry) /* prevent recursion */ 2326 SEND_QUEUE(f); 2327 } 2328 if (writev(f->f_file, iov, v - iov) < 0) { 2329 e = errno; 2330 if (f->f_un.f_pipe.f_pid > 0) { 2331 (void) close(f->f_file); 2332 deadq_enter(f->f_un.f_pipe.f_pid, 2333 f->f_un.f_pipe.f_pname); 2334 } 2335 f->f_un.f_pipe.f_pid = 0; 2336 /* 2337 * If the error was EPIPE, then what is likely 2338 * has happened is we have a command that is 2339 * designed to take a single message line and 2340 * then exit, but we tried to feed it another 2341 * one before we reaped the child and thus 2342 * reset our state. 2343 * 2344 * Well, now we've reset our state, so try opening 2345 * the pipe and sending the message again if EPIPE 2346 * was the error. 2347 */ 2348 if (e == EPIPE) { 2349 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname, 2350 &f->f_un.f_pipe.f_pid)) < 0) { 2351 f->f_type = F_UNUSED; 2352 message_queue_freeall(f); 2353 logerror(f->f_un.f_pipe.f_pname); 2354 break; 2355 } 2356 if (writev(f->f_file, iov, v - iov) < 0) { 2357 e = errno; 2358 if (f->f_un.f_pipe.f_pid > 0) { 2359 (void) close(f->f_file); 2360 deadq_enter(f->f_un.f_pipe.f_pid, 2361 f->f_un.f_pipe.f_pname); 2362 } 2363 f->f_un.f_pipe.f_pid = 0; 2364 error = true; /* enqueue on return */ 2365 } else 2366 e = 0; 2367 } 2368 if (e != 0 && !error) { 2369 errno = e; 2370 logerror(f->f_un.f_pipe.f_pname); 2371 } 2372 } 2373 if (e == 0 && qentry) { /* sent buffered msg */ 2374 message_queue_remove(f, qentry); 2375 } 2376 break; 2377 2378 case F_CONSOLE: 2379 if (buffer->flags & IGN_CONS) { 2380 DPRINTF(D_MISC, "Logging to %s (ignored)\n", 2381 TypeInfo[f->f_type].name); 2382 break; 2383 } 2384 /* FALLTHROUGH */ 2385 2386 case F_TTY: 2387 case F_FILE: 2388 DPRINTF(D_MISC, "Logging to %s %s\n", 2389 TypeInfo[f->f_type].name, f->f_un.f_fname); 2390 again: 2391 if (writev(f->f_file, iov, v - iov) < 0) { 2392 e = errno; 2393 if (f->f_type == F_FILE && e == ENOSPC) { 2394 int lasterror = f->f_lasterror; 2395 f->f_lasterror = e; 2396 if (lasterror != e) 2397 logerror(f->f_un.f_fname); 2398 error = true; /* enqueue on return */ 2399 } 2400 (void)close(f->f_file); 2401 /* 2402 * Check for errors on TTY's due to loss of tty 2403 */ 2404 if ((e == EIO || e == EBADF) && f->f_type != F_FILE) { 2405 f->f_file = open(f->f_un.f_fname, 2406 O_WRONLY|O_APPEND, 0); 2407 if (f->f_file < 0) { 2408 f->f_type = F_UNUSED; 2409 logerror(f->f_un.f_fname); 2410 message_queue_freeall(f); 2411 } else 2412 goto again; 2413 } else { 2414 f->f_type = F_UNUSED; 2415 errno = e; 2416 f->f_lasterror = e; 2417 logerror(f->f_un.f_fname); 2418 message_queue_freeall(f); 2419 } 2420 } else { 2421 f->f_lasterror = 0; 2422 if ((buffer->flags & SYNC_FILE) 2423 && (f->f_flags & FFLAG_SYNC)) 2424 (void)fsync(f->f_file); 2425 /* Problem with files: We cannot check beforehand if 2426 * they would be writeable and call send_queue() first. 2427 * So we call send_queue() after a successful write, 2428 * which means the first message will be out of order. 2429 */ 2430 if (!qentry) /* prevent recursion */ 2431 SEND_QUEUE(f); 2432 else if (qentry) /* sent buffered msg */ 2433 message_queue_remove(f, qentry); 2434 } 2435 break; 2436 2437 case F_USERS: 2438 case F_WALL: 2439 DPRINTF(D_MISC, "Logging to %s\n", TypeInfo[f->f_type].name); 2440 wallmsg(f, iov, v - iov); 2441 break; 2442 } 2443 f->f_prevcount = 0; 2444 2445 if (error && !qentry) 2446 message_queue_add(f, NEWREF(buffer)); 2447 #ifndef DISABLE_SIGN 2448 if (newhash) { 2449 struct signature_group_t *sg; 2450 sg = sign_get_sg(buffer->pri, f); 2451 (void)sign_send_signature_block(sg, false); 2452 } 2453 #endif /* !DISABLE_SIGN */ 2454 /* this belongs to the ad-hoc buffer at the first if(buffer) */ 2455 DELREF(buffer); 2456 /* TLS frees on its own */ 2457 if (f->f_type != F_TLS) 2458 FREEPTR(line); 2459 } 2460 2461 /* send one line by UDP */ 2462 void 2463 udp_send(struct filed *f, char *line, size_t len) 2464 { 2465 int lsent, fail, retry, j; 2466 struct addrinfo *r; 2467 2468 DPRINTF((D_NET|D_CALL), "udp_send(f=%p, line=\"%s\", " 2469 "len=%zu) to dest.\n", f, line, len); 2470 2471 if (!finet) 2472 return; 2473 2474 lsent = -1; 2475 fail = 0; 2476 assert(f->f_type == F_FORW); 2477 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) { 2478 retry = 0; 2479 for (j = 0; j < finet->fd; j++) { 2480 sendagain: 2481 lsent = sendto(finet[j+1].fd, line, len, 0, 2482 r->ai_addr, r->ai_addrlen); 2483 if (lsent == -1) { 2484 switch (errno) { 2485 case ENOBUFS: 2486 /* wait/retry/drop */ 2487 if (++retry < 5) { 2488 usleep(1000); 2489 goto sendagain; 2490 } 2491 break; 2492 case EHOSTDOWN: 2493 case EHOSTUNREACH: 2494 case ENETDOWN: 2495 /* drop */ 2496 break; 2497 default: 2498 /* busted */ 2499 fail++; 2500 break; 2501 } 2502 } else if (lsent == len) 2503 break; 2504 } 2505 if (lsent != len && fail) { 2506 f->f_type = F_UNUSED; 2507 logerror("sendto() failed"); 2508 } 2509 } 2510 } 2511 2512 /* 2513 * WALLMSG -- Write a message to the world at large 2514 * 2515 * Write the specified message to either the entire 2516 * world, or a list of approved users. 2517 */ 2518 void 2519 wallmsg(struct filed *f, struct iovec *iov, size_t iovcnt) 2520 { 2521 #ifdef __NetBSD_Version__ 2522 static int reenter; /* avoid calling ourselves */ 2523 int i; 2524 char *p; 2525 struct utmpentry *ep; 2526 2527 if (reenter++) 2528 return; 2529 2530 (void)getutentries(NULL, &ep); 2531 /* NOSTRICT */ 2532 for (; ep; ep = ep->next) { 2533 if (f->f_type == F_WALL) { 2534 if ((p = ttymsg(iov, iovcnt, ep->line, TTYMSGTIME)) 2535 != NULL) { 2536 errno = 0; /* already in msg */ 2537 logerror(p); 2538 } 2539 continue; 2540 } 2541 /* should we send the message to this user? */ 2542 for (i = 0; i < MAXUNAMES; i++) { 2543 if (!f->f_un.f_uname[i][0]) 2544 break; 2545 if (strcmp(f->f_un.f_uname[i], ep->name) == 0) { 2546 if ((p = ttymsg(iov, iovcnt, ep->line, 2547 TTYMSGTIME)) != NULL) { 2548 errno = 0; /* already in msg */ 2549 logerror(p); 2550 } 2551 break; 2552 } 2553 } 2554 } 2555 reenter = 0; 2556 #endif /* __NetBSD_Version__ */ 2557 } 2558 2559 void 2560 /*ARGSUSED*/ 2561 reapchild(int fd, short event, void *ev) 2562 { 2563 int status; 2564 pid_t pid; 2565 struct filed *f; 2566 2567 while ((pid = wait3(&status, WNOHANG, NULL)) > 0) { 2568 if (!Initialized || ShuttingDown) { 2569 /* 2570 * Be silent while we are initializing or 2571 * shutting down. 2572 */ 2573 continue; 2574 } 2575 2576 if (deadq_remove(pid)) 2577 continue; 2578 2579 /* Now, look in the list of active processes. */ 2580 for (f = Files; f != NULL; f = f->f_next) { 2581 if (f->f_type == F_PIPE && 2582 f->f_un.f_pipe.f_pid == pid) { 2583 (void) close(f->f_file); 2584 f->f_un.f_pipe.f_pid = 0; 2585 log_deadchild(pid, status, 2586 f->f_un.f_pipe.f_pname); 2587 break; 2588 } 2589 } 2590 } 2591 } 2592 2593 /* 2594 * Return a printable representation of a host address (FQDN if available) 2595 */ 2596 const char * 2597 cvthname(struct sockaddr_storage *f) 2598 { 2599 int error; 2600 int niflag = NI_DGRAM; 2601 static char host[NI_MAXHOST], ip[NI_MAXHOST]; 2602 2603 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 2604 ip, sizeof ip, NULL, 0, NI_NUMERICHOST|niflag); 2605 2606 DPRINTF(D_CALL, "cvthname(%s)\n", ip); 2607 2608 if (error) { 2609 DPRINTF(D_NET, "Malformed from address %s\n", 2610 gai_strerror(error)); 2611 return "???"; 2612 } 2613 2614 if (!UseNameService) 2615 return ip; 2616 2617 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 2618 host, sizeof host, NULL, 0, niflag); 2619 if (error) { 2620 DPRINTF(D_NET, "Host name for your address (%s) unknown\n", ip); 2621 return ip; 2622 } 2623 2624 return host; 2625 } 2626 2627 void 2628 trim_anydomain(char *host) 2629 { 2630 bool onlydigits = true; 2631 int i; 2632 2633 if (!BSDOutputFormat) 2634 return; 2635 2636 /* if non-digits found, then assume hostname and cut at first dot (this 2637 * case also covers IPv6 addresses which should not contain dots), 2638 * if only digits then assume IPv4 address and do not cut at all */ 2639 for (i = 0; host[i]; i++) { 2640 if (host[i] == '.' && !onlydigits) 2641 host[i] = '\0'; 2642 else if (!isdigit((unsigned char)host[i]) && host[i] != '.') 2643 onlydigits = false; 2644 } 2645 } 2646 2647 static void 2648 /*ARGSUSED*/ 2649 domark(int fd, short event, void *ev) 2650 { 2651 struct event *ev_pass = (struct event *)ev; 2652 struct filed *f; 2653 dq_t q, nextq; 2654 sigset_t newmask, omask; 2655 2656 schedule_event(&ev_pass, 2657 &((struct timeval){TIMERINTVL, 0}), 2658 domark, ev_pass); 2659 DPRINTF((D_CALL|D_EVENT), "domark()\n"); 2660 2661 BLOCK_SIGNALS(omask, newmask); 2662 now = time((time_t *)NULL); 2663 MarkSeq += TIMERINTVL; 2664 if (MarkSeq >= MarkInterval) { 2665 logmsg_async(LOG_INFO, NULL, "-- MARK --", ADDDATE|MARK); 2666 MarkSeq = 0; 2667 } 2668 2669 for (f = Files; f; f = f->f_next) { 2670 if (f->f_prevcount && now >= REPEATTIME(f)) { 2671 DPRINTF(D_DATA, "Flush %s: repeated %d times, %d sec.\n", 2672 TypeInfo[f->f_type].name, f->f_prevcount, 2673 repeatinterval[f->f_repeatcount]); 2674 fprintlog(f, NULL, NULL); 2675 BACKOFF(f); 2676 } 2677 } 2678 message_allqueues_check(); 2679 RESTORE_SIGNALS(omask); 2680 2681 /* Walk the dead queue, and see if we should signal somebody. */ 2682 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = nextq) { 2683 nextq = TAILQ_NEXT(q, dq_entries); 2684 switch (q->dq_timeout) { 2685 case 0: 2686 /* Already signalled once, try harder now. */ 2687 if (kill(q->dq_pid, SIGKILL) != 0) 2688 (void) deadq_remove(q->dq_pid); 2689 break; 2690 2691 case 1: 2692 /* 2693 * Timed out on the dead queue, send terminate 2694 * signal. Note that we leave the removal from 2695 * the dead queue to reapchild(), which will 2696 * also log the event (unless the process 2697 * didn't even really exist, in case we simply 2698 * drop it from the dead queue). 2699 */ 2700 if (kill(q->dq_pid, SIGTERM) != 0) { 2701 (void) deadq_remove(q->dq_pid); 2702 break; 2703 } 2704 /* FALLTHROUGH */ 2705 2706 default: 2707 q->dq_timeout--; 2708 } 2709 } 2710 #ifndef DISABLE_SIGN 2711 if (GlobalSign.rsid) { /* check if initialized */ 2712 struct signature_group_t *sg; 2713 STAILQ_FOREACH(sg, &GlobalSign.SigGroups, entries) { 2714 sign_send_certificate_block(sg); 2715 } 2716 } 2717 #endif /* !DISABLE_SIGN */ 2718 } 2719 2720 /* 2721 * Print syslogd errors some place. 2722 */ 2723 void 2724 logerror(const char *fmt, ...) 2725 { 2726 static int logerror_running; 2727 va_list ap; 2728 char tmpbuf[BUFSIZ]; 2729 char buf[BUFSIZ]; 2730 char *outbuf; 2731 2732 /* If there's an error while trying to log an error, give up. */ 2733 if (logerror_running) 2734 return; 2735 logerror_running = 1; 2736 2737 va_start(ap, fmt); 2738 (void)vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap); 2739 va_end(ap); 2740 2741 if (errno) { 2742 (void)snprintf(buf, sizeof(buf), "%s: %s", 2743 tmpbuf, strerror(errno)); 2744 outbuf = buf; 2745 } else { 2746 (void)snprintf(buf, sizeof(buf), "%s", tmpbuf); 2747 outbuf = tmpbuf; 2748 } 2749 2750 if (daemonized) 2751 logmsg_async(LOG_SYSLOG|LOG_ERR, NULL, outbuf, ADDDATE); 2752 if (!daemonized && Debug) 2753 DPRINTF(D_MISC, "%s\n", outbuf); 2754 if (!daemonized && !Debug) 2755 printf("%s\n", outbuf); 2756 2757 logerror_running = 0; 2758 } 2759 2760 /* 2761 * Print syslogd info some place. 2762 */ 2763 void 2764 loginfo(const char *fmt, ...) 2765 { 2766 va_list ap; 2767 char buf[BUFSIZ]; 2768 2769 va_start(ap, fmt); 2770 (void)vsnprintf(buf, sizeof(buf), fmt, ap); 2771 va_end(ap); 2772 2773 DPRINTF(D_MISC, "%s\n", buf); 2774 logmsg_async(LOG_SYSLOG|LOG_INFO, NULL, buf, ADDDATE); 2775 } 2776 2777 #ifndef DISABLE_TLS 2778 static inline void 2779 free_incoming_tls_sockets(void) 2780 { 2781 struct TLS_Incoming_Conn *tls_in; 2782 int i; 2783 2784 /* 2785 * close all listening and connected TLS sockets 2786 */ 2787 if (TLS_Listen_Set) 2788 for (i = 0; i < TLS_Listen_Set->fd; i++) { 2789 if (close(TLS_Listen_Set[i+1].fd) == -1) 2790 logerror("close() failed"); 2791 DEL_EVENT(TLS_Listen_Set[i+1].ev); 2792 FREEPTR(TLS_Listen_Set[i+1].ev); 2793 } 2794 FREEPTR(TLS_Listen_Set); 2795 /* close/free incoming TLS connections */ 2796 while (!SLIST_EMPTY(&TLS_Incoming_Head)) { 2797 tls_in = SLIST_FIRST(&TLS_Incoming_Head); 2798 SLIST_REMOVE_HEAD(&TLS_Incoming_Head, entries); 2799 FREEPTR(tls_in->inbuf); 2800 free_tls_conn(tls_in->tls_conn); 2801 free(tls_in); 2802 } 2803 } 2804 #endif /* !DISABLE_TLS */ 2805 2806 void 2807 /*ARGSUSED*/ 2808 die(int fd, short event, void *ev) 2809 { 2810 struct filed *f, *next; 2811 char **p; 2812 sigset_t newmask, omask; 2813 int i; 2814 2815 ShuttingDown = 1; /* Don't log SIGCHLDs. */ 2816 /* prevent recursive signals */ 2817 BLOCK_SIGNALS(omask, newmask); 2818 2819 /* 2820 * flush any pending output 2821 */ 2822 for (f = Files; f != NULL; f = f->f_next) { 2823 /* flush any pending output */ 2824 if (f->f_prevcount) 2825 fprintlog(f, NULL, NULL); 2826 SEND_QUEUE(f); 2827 } 2828 2829 #ifndef DISABLE_TLS 2830 free_incoming_tls_sockets(); 2831 #endif /* !DISABLE_TLS */ 2832 #ifndef DISABLE_SIGN 2833 sign_global_free(); 2834 #endif /* !DISABLE_SIGN */ 2835 2836 /* 2837 * Close all open log files. 2838 */ 2839 for (f = Files; f != NULL; f = next) { 2840 message_queue_freeall(f); 2841 2842 switch (f->f_type) { 2843 case F_FILE: 2844 case F_TTY: 2845 case F_CONSOLE: 2846 (void)close(f->f_file); 2847 break; 2848 case F_PIPE: 2849 if (f->f_un.f_pipe.f_pid > 0) { 2850 (void)close(f->f_file); 2851 } 2852 f->f_un.f_pipe.f_pid = 0; 2853 break; 2854 case F_FORW: 2855 if (f->f_un.f_forw.f_addr) 2856 freeaddrinfo(f->f_un.f_forw.f_addr); 2857 break; 2858 #ifndef DISABLE_TLS 2859 case F_TLS: 2860 free_tls_conn(f->f_un.f_tls.tls_conn); 2861 break; 2862 #endif /* !DISABLE_TLS */ 2863 } 2864 next = f->f_next; 2865 DELREF(f->f_prevmsg); 2866 FREEPTR(f->f_program); 2867 FREEPTR(f->f_host); 2868 DEL_EVENT(f->f_sq_event); 2869 free((char *)f); 2870 } 2871 2872 /* 2873 * Close all open UDP sockets 2874 */ 2875 if (finet) { 2876 for (i = 0; i < finet->fd; i++) { 2877 if (close(finet[i+1].fd) < 0) { 2878 logerror("close() failed"); 2879 die(0, 0, NULL); 2880 } 2881 DEL_EVENT(finet[i+1].ev); 2882 FREEPTR(finet[i+1].ev); 2883 } 2884 FREEPTR(finet); 2885 } 2886 2887 /* free config options */ 2888 for (i = 0; i < A_CNT(TypeInfo); i++) { 2889 FREEPTR(TypeInfo[i].queue_length_string); 2890 FREEPTR(TypeInfo[i].queue_size_string); 2891 } 2892 2893 #ifndef DISABLE_TLS 2894 FREEPTR(tls_opt.CAdir); 2895 FREEPTR(tls_opt.CAfile); 2896 FREEPTR(tls_opt.keyfile); 2897 FREEPTR(tls_opt.certfile); 2898 FREEPTR(tls_opt.x509verify); 2899 FREEPTR(tls_opt.bindhost); 2900 FREEPTR(tls_opt.bindport); 2901 FREEPTR(tls_opt.server); 2902 FREEPTR(tls_opt.gen_cert); 2903 free_cred_SLIST(&tls_opt.cert_head); 2904 free_cred_SLIST(&tls_opt.fprint_head); 2905 FREE_SSL_CTX(tls_opt.global_TLS_CTX); 2906 #endif /* !DISABLE_TLS */ 2907 2908 FREEPTR(funix); 2909 errno = 0; 2910 if (ev != NULL) 2911 logerror("Exiting on signal %d", fd); 2912 else 2913 logerror("Fatal error, exiting"); 2914 for (p = LogPaths; p && *p; p++) 2915 unlink(*p); 2916 exit(0); 2917 } 2918 2919 #ifndef DISABLE_SIGN 2920 /* 2921 * get one "sign_delim_sg2" item, convert and store in ordered queue 2922 */ 2923 void 2924 store_sign_delim_sg2(char *tmp_buf) 2925 { 2926 struct string_queue *sqentry, *sqe1, *sqe2; 2927 2928 if(!(sqentry = malloc(sizeof(*sqentry)))) { 2929 logerror("Unable to allocate memory"); 2930 return; 2931 } 2932 /*LINTED constcond/null effect */ 2933 assert(sizeof(int64_t) == sizeof(uint_fast64_t)); 2934 if (dehumanize_number(tmp_buf, (int64_t*) &(sqentry->key)) == -1 2935 || sqentry->key > (LOG_NFACILITIES<<3)) { 2936 DPRINTF(D_PARSE, "invalid sign_delim_sg2: %s\n", tmp_buf); 2937 free(sqentry); 2938 FREEPTR(tmp_buf); 2939 return; 2940 } 2941 sqentry->data = tmp_buf; 2942 2943 if (STAILQ_EMPTY(&GlobalSign.sig2_delims)) { 2944 STAILQ_INSERT_HEAD(&GlobalSign.sig2_delims, 2945 sqentry, entries); 2946 return; 2947 } 2948 2949 /* keep delimiters sorted */ 2950 sqe1 = sqe2 = STAILQ_FIRST(&GlobalSign.sig2_delims); 2951 if (sqe1->key > sqentry->key) { 2952 STAILQ_INSERT_HEAD(&GlobalSign.sig2_delims, 2953 sqentry, entries); 2954 return; 2955 } 2956 2957 while ((sqe1 = sqe2) 2958 && (sqe2 = STAILQ_NEXT(sqe1, entries))) { 2959 if (sqe2->key > sqentry->key) { 2960 break; 2961 } else if (sqe2->key == sqentry->key) { 2962 DPRINTF(D_PARSE, "duplicate sign_delim_sg2: %s\n", 2963 tmp_buf); 2964 FREEPTR(sqentry); 2965 FREEPTR(tmp_buf); 2966 return; 2967 } 2968 } 2969 STAILQ_INSERT_AFTER(&GlobalSign.sig2_delims, sqe1, sqentry, entries); 2970 } 2971 #endif /* !DISABLE_SIGN */ 2972 2973 /* 2974 * read syslog.conf 2975 */ 2976 void 2977 read_config_file(FILE *cf, struct filed **f_ptr) 2978 { 2979 size_t linenum = 0; 2980 size_t i; 2981 struct filed *f, **nextp; 2982 char cline[LINE_MAX]; 2983 char prog[NAME_MAX + 1]; 2984 char host[MAXHOSTNAMELEN]; 2985 const char *p; 2986 char *q; 2987 bool found_keyword; 2988 #ifndef DISABLE_TLS 2989 struct peer_cred *cred = NULL; 2990 struct peer_cred_head *credhead = NULL; 2991 #endif /* !DISABLE_TLS */ 2992 #ifndef DISABLE_SIGN 2993 char *sign_sg_str = NULL; 2994 #endif /* !DISABLE_SIGN */ 2995 #if (!defined(DISABLE_TLS) || !defined(DISABLE_SIGN)) 2996 char *tmp_buf = NULL; 2997 #endif /* (!defined(DISABLE_TLS) || !defined(DISABLE_SIGN)) */ 2998 /* central list of recognized configuration keywords 2999 * and an address for their values as strings */ 3000 const struct config_keywords { 3001 const char *keyword; 3002 char **variable; 3003 } config_keywords[] = { 3004 #ifndef DISABLE_TLS 3005 /* TLS settings */ 3006 {"tls_ca", &tls_opt.CAfile}, 3007 {"tls_cadir", &tls_opt.CAdir}, 3008 {"tls_cert", &tls_opt.certfile}, 3009 {"tls_key", &tls_opt.keyfile}, 3010 {"tls_verify", &tls_opt.x509verify}, 3011 {"tls_bindport", &tls_opt.bindport}, 3012 {"tls_bindhost", &tls_opt.bindhost}, 3013 {"tls_server", &tls_opt.server}, 3014 {"tls_gen_cert", &tls_opt.gen_cert}, 3015 /* special cases in parsing */ 3016 {"tls_allow_fingerprints",&tmp_buf}, 3017 {"tls_allow_clientcerts", &tmp_buf}, 3018 /* buffer settings */ 3019 {"tls_queue_length", &TypeInfo[F_TLS].queue_length_string}, 3020 {"tls_queue_size", &TypeInfo[F_TLS].queue_size_string}, 3021 #endif /* !DISABLE_TLS */ 3022 {"file_queue_length", &TypeInfo[F_FILE].queue_length_string}, 3023 {"pipe_queue_length", &TypeInfo[F_PIPE].queue_length_string}, 3024 {"file_queue_size", &TypeInfo[F_FILE].queue_size_string}, 3025 {"pipe_queue_size", &TypeInfo[F_PIPE].queue_size_string}, 3026 #ifndef DISABLE_SIGN 3027 /* syslog-sign setting */ 3028 {"sign_sg", &sign_sg_str}, 3029 /* also special case in parsing */ 3030 {"sign_delim_sg2", &tmp_buf}, 3031 #endif /* !DISABLE_SIGN */ 3032 }; 3033 3034 DPRINTF(D_CALL, "read_config_file()\n"); 3035 3036 /* free all previous config options */ 3037 for (i = 0; i < A_CNT(TypeInfo); i++) { 3038 if (TypeInfo[i].queue_length_string 3039 && TypeInfo[i].queue_length_string 3040 != TypeInfo[i].default_length_string) { 3041 FREEPTR(TypeInfo[i].queue_length_string); 3042 TypeInfo[i].queue_length_string = 3043 strdup(TypeInfo[i].default_length_string); 3044 } 3045 if (TypeInfo[i].queue_size_string 3046 && TypeInfo[i].queue_size_string 3047 != TypeInfo[i].default_size_string) { 3048 FREEPTR(TypeInfo[i].queue_size_string); 3049 TypeInfo[i].queue_size_string = 3050 strdup(TypeInfo[i].default_size_string); 3051 } 3052 } 3053 for (i = 0; i < A_CNT(config_keywords); i++) 3054 FREEPTR(*config_keywords[i].variable); 3055 /* 3056 * global settings 3057 */ 3058 while (fgets(cline, sizeof(cline), cf) != NULL) { 3059 linenum++; 3060 for (p = cline; isspace((unsigned char)*p); ++p) 3061 continue; 3062 if ((*p == '\0') || (*p == '#')) 3063 continue; 3064 3065 for (i = 0; i < A_CNT(config_keywords); i++) { 3066 if (copy_config_value(config_keywords[i].keyword, 3067 config_keywords[i].variable, &p, ConfFile, 3068 linenum)) { 3069 DPRINTF((D_PARSE|D_MEM), 3070 "found option %s, saved @%p\n", 3071 config_keywords[i].keyword, 3072 *config_keywords[i].variable); 3073 #ifndef DISABLE_SIGN 3074 if (!strcmp("sign_delim_sg2", 3075 config_keywords[i].keyword)) 3076 do { 3077 store_sign_delim_sg2(tmp_buf); 3078 } while (copy_config_value_word( 3079 &tmp_buf, &p)); 3080 3081 #endif /* !DISABLE_SIGN */ 3082 3083 #ifndef DISABLE_TLS 3084 /* special cases with multiple parameters */ 3085 if (!strcmp("tls_allow_fingerprints", 3086 config_keywords[i].keyword)) 3087 credhead = &tls_opt.fprint_head; 3088 else if (!strcmp("tls_allow_clientcerts", 3089 config_keywords[i].keyword)) 3090 credhead = &tls_opt.cert_head; 3091 3092 if (credhead) do { 3093 if(!(cred = malloc(sizeof(*cred)))) { 3094 logerror("Unable to " 3095 "allocate memory"); 3096 break; 3097 } 3098 cred->data = tmp_buf; 3099 tmp_buf = NULL; 3100 SLIST_INSERT_HEAD(credhead, 3101 cred, entries); 3102 } while /* additional values? */ 3103 (copy_config_value_word(&tmp_buf, &p)); 3104 credhead = NULL; 3105 break; 3106 #endif /* !DISABLE_TLS */ 3107 } 3108 } 3109 } 3110 /* convert strings to integer values */ 3111 for (i = 0; i < A_CNT(TypeInfo); i++) { 3112 if (!TypeInfo[i].queue_length_string 3113 || dehumanize_number(TypeInfo[i].queue_length_string, 3114 &TypeInfo[i].queue_length) == -1) 3115 TypeInfo[i].queue_length = strtol( 3116 TypeInfo[i].default_length_string, NULL, 10); 3117 if (!TypeInfo[i].queue_size_string 3118 || dehumanize_number(TypeInfo[i].queue_size_string, 3119 &TypeInfo[i].queue_size) == -1) 3120 TypeInfo[i].queue_size = strtol( 3121 TypeInfo[i].default_size_string, NULL, 10); 3122 } 3123 3124 #ifndef DISABLE_SIGN 3125 if (sign_sg_str) { 3126 if (sign_sg_str[1] == '\0' 3127 && (sign_sg_str[0] == '0' || sign_sg_str[0] == '1' 3128 || sign_sg_str[0] == '2' || sign_sg_str[0] == '3')) 3129 GlobalSign.sg = sign_sg_str[0] - '0'; 3130 else { 3131 GlobalSign.sg = SIGN_SG; 3132 DPRINTF(D_MISC, "Invalid sign_sg value `%s', " 3133 "use default value `%d'\n", 3134 sign_sg_str, GlobalSign.sg); 3135 } 3136 } else /* disable syslog-sign */ 3137 GlobalSign.sg = -1; 3138 #endif /* !DISABLE_SIGN */ 3139 3140 rewind(cf); 3141 linenum = 0; 3142 /* 3143 * Foreach line in the conf table, open that file. 3144 */ 3145 f = NULL; 3146 nextp = &f; 3147 3148 strcpy(prog, "*"); 3149 strcpy(host, "*"); 3150 while (fgets(cline, sizeof(cline), cf) != NULL) { 3151 linenum++; 3152 found_keyword = false; 3153 /* 3154 * check for end-of-section, comments, strip off trailing 3155 * spaces and newline character. #!prog is treated specially: 3156 * following lines apply only to that program. 3157 */ 3158 for (p = cline; isspace((unsigned char)*p); ++p) 3159 continue; 3160 if (*p == '\0') 3161 continue; 3162 if (*p == '#') { 3163 p++; 3164 if (*p != '!' && *p != '+' && *p != '-') 3165 continue; 3166 } 3167 3168 for (i = 0; i < A_CNT(config_keywords); i++) { 3169 if (!strncasecmp(p, config_keywords[i].keyword, 3170 strlen(config_keywords[i].keyword))) { 3171 DPRINTF(D_PARSE, 3172 "skip cline %zu with keyword %s\n", 3173 linenum, config_keywords[i].keyword); 3174 found_keyword = true; 3175 } 3176 } 3177 if (found_keyword) 3178 continue; 3179 3180 if (*p == '+' || *p == '-') { 3181 host[0] = *p++; 3182 while (isspace((unsigned char)*p)) 3183 p++; 3184 if (*p == '\0' || *p == '*') { 3185 strcpy(host, "*"); 3186 continue; 3187 } 3188 /* the +hostname expression will continue 3189 * to use the LocalHostName, not the FQDN */ 3190 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) { 3191 if (*p == '@') { 3192 (void)strncpy(&host[i], LocalHostName, 3193 sizeof(host) - 1 - i); 3194 host[sizeof(host) - 1] = '\0'; 3195 i = strlen(host) - 1; 3196 p++; 3197 continue; 3198 } 3199 if (!isalnum((unsigned char)*p) && 3200 *p != '.' && *p != '-' && *p != ',') 3201 break; 3202 host[i] = *p++; 3203 } 3204 host[i] = '\0'; 3205 continue; 3206 } 3207 if (*p == '!') { 3208 p++; 3209 while (isspace((unsigned char)*p)) 3210 p++; 3211 if (*p == '\0' || *p == '*') { 3212 strcpy(prog, "*"); 3213 continue; 3214 } 3215 for (i = 0; i < NAME_MAX; i++) { 3216 if (!isprint((unsigned char)p[i])) 3217 break; 3218 prog[i] = p[i]; 3219 } 3220 prog[i] = '\0'; 3221 continue; 3222 } 3223 for (q = strchr(cline, '\0'); isspace((unsigned char)*--q);) 3224 continue; 3225 *++q = '\0'; 3226 if ((f = calloc(1, sizeof(*f))) == NULL) { 3227 logerror("alloc failed"); 3228 die(0, 0, NULL); 3229 } 3230 if (!*f_ptr) *f_ptr = f; /* return first node */ 3231 *nextp = f; 3232 nextp = &f->f_next; 3233 cfline(linenum, cline, f, prog, host); 3234 } 3235 } 3236 3237 /* 3238 * INIT -- Initialize syslogd from configuration table 3239 */ 3240 void 3241 /*ARGSUSED*/ 3242 init(int fd, short event, void *ev) 3243 { 3244 FILE *cf; 3245 size_t i; 3246 struct filed *f, *newf, **nextp, *f2; 3247 char *p; 3248 sigset_t newmask, omask; 3249 char *tls_status_msg = NULL; 3250 #ifndef DISABLE_TLS 3251 struct peer_cred *cred = NULL; 3252 #endif /* !DISABLE_TLS */ 3253 3254 /* prevent recursive signals */ 3255 BLOCK_SIGNALS(omask, newmask); 3256 3257 DPRINTF((D_EVENT|D_CALL), "init\n"); 3258 3259 /* 3260 * be careful about dependencies and order of actions: 3261 * 1. flush buffer queues 3262 * 2. flush -sign SBs 3263 * 3. flush/delete buffer queue again, in case an SB got there 3264 * 4. close files/connections 3265 */ 3266 3267 /* 3268 * flush any pending output 3269 */ 3270 for (f = Files; f != NULL; f = f->f_next) { 3271 /* flush any pending output */ 3272 if (f->f_prevcount) 3273 fprintlog(f, NULL, NULL); 3274 SEND_QUEUE(f); 3275 } 3276 /* some actions only on SIGHUP and not on first start */ 3277 if (Initialized) { 3278 #ifndef DISABLE_SIGN 3279 sign_global_free(); 3280 #endif /* !DISABLE_SIGN */ 3281 #ifndef DISABLE_TLS 3282 free_incoming_tls_sockets(); 3283 #endif /* !DISABLE_TLS */ 3284 Initialized = 0; 3285 } 3286 /* 3287 * Close all open log files. 3288 */ 3289 for (f = Files; f != NULL; f = f->f_next) { 3290 switch (f->f_type) { 3291 case F_FILE: 3292 case F_TTY: 3293 case F_CONSOLE: 3294 (void)close(f->f_file); 3295 break; 3296 case F_PIPE: 3297 if (f->f_un.f_pipe.f_pid > 0) { 3298 (void)close(f->f_file); 3299 deadq_enter(f->f_un.f_pipe.f_pid, 3300 f->f_un.f_pipe.f_pname); 3301 } 3302 f->f_un.f_pipe.f_pid = 0; 3303 break; 3304 case F_FORW: 3305 if (f->f_un.f_forw.f_addr) 3306 freeaddrinfo(f->f_un.f_forw.f_addr); 3307 break; 3308 #ifndef DISABLE_TLS 3309 case F_TLS: 3310 free_tls_sslptr(f->f_un.f_tls.tls_conn); 3311 break; 3312 #endif /* !DISABLE_TLS */ 3313 } 3314 } 3315 3316 /* 3317 * Close all open UDP sockets 3318 */ 3319 if (finet) { 3320 for (i = 0; i < finet->fd; i++) { 3321 if (close(finet[i+1].fd) < 0) { 3322 logerror("close() failed"); 3323 die(0, 0, NULL); 3324 } 3325 DEL_EVENT(finet[i+1].ev); 3326 FREEPTR(finet[i+1].ev); 3327 } 3328 FREEPTR(finet); 3329 } 3330 3331 /* get FQDN and hostname/domain */ 3332 FREEPTR(oldLocalFQDN); 3333 oldLocalFQDN = LocalFQDN; 3334 LocalFQDN = getLocalFQDN(); 3335 if ((p = strchr(LocalFQDN, '.')) != NULL) 3336 (void)strlcpy(LocalHostName, LocalFQDN, 1+p-LocalFQDN); 3337 else 3338 (void)strlcpy(LocalHostName, LocalFQDN, sizeof(LocalHostName)); 3339 3340 /* 3341 * Reset counter of forwarding actions 3342 */ 3343 3344 NumForwards=0; 3345 3346 /* new destination list to replace Files */ 3347 newf = NULL; 3348 nextp = &newf; 3349 3350 /* open the configuration file */ 3351 if ((cf = fopen(ConfFile, "r")) == NULL) { 3352 DPRINTF(D_FILE, "Cannot open `%s'\n", ConfFile); 3353 *nextp = (struct filed *)calloc(1, sizeof(*f)); 3354 cfline(0, "*.ERR\t/dev/console", *nextp, "*", "*"); 3355 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f)); 3356 cfline(0, "*.PANIC\t*", (*nextp)->f_next, "*", "*"); 3357 Initialized = 1; 3358 RESTORE_SIGNALS(omask); 3359 return; 3360 } 3361 3362 #ifndef DISABLE_TLS 3363 /* init with new TLS_CTX 3364 * as far as I see one cannot change the cert/key of an existing CTX 3365 */ 3366 FREE_SSL_CTX(tls_opt.global_TLS_CTX); 3367 3368 free_cred_SLIST(&tls_opt.cert_head); 3369 free_cred_SLIST(&tls_opt.fprint_head); 3370 #endif /* !DISABLE_TLS */ 3371 3372 /* read and close configuration file */ 3373 read_config_file(cf, &newf); 3374 newf = *nextp; 3375 (void)fclose(cf); 3376 DPRINTF(D_MISC, "read_config_file() returned newf=%p\n", newf); 3377 3378 #define MOVE_QUEUE(dst, src) do { \ 3379 struct buf_queue *buf; \ 3380 STAILQ_CONCAT(&dst->f_qhead, &src->f_qhead); \ 3381 STAILQ_FOREACH(buf, &dst->f_qhead, entries) { \ 3382 dst->f_qelements++; \ 3383 dst->f_qsize += buf_queue_obj_size(buf); \ 3384 } \ 3385 src->f_qsize = 0; \ 3386 src->f_qelements = 0; \ 3387 } while (/*CONSTCOND*/0) 3388 3389 /* 3390 * Free old log files. 3391 */ 3392 for (f = Files; f != NULL; f = f->f_next) { 3393 /* check if a new logfile is equal, if so pass the queue */ 3394 for (f2 = newf; f2 != NULL; f2 = f2->f_next) { 3395 if (f->f_type == f2->f_type 3396 && ((f->f_type == F_PIPE 3397 && !strcmp(f->f_un.f_pipe.f_pname, 3398 f2->f_un.f_pipe.f_pname)) 3399 #ifndef DISABLE_TLS 3400 || (f->f_type == F_TLS 3401 && !strcmp(f->f_un.f_tls.tls_conn->hostname, 3402 f2->f_un.f_tls.tls_conn->hostname) 3403 && !strcmp(f->f_un.f_tls.tls_conn->port, 3404 f2->f_un.f_tls.tls_conn->port)) 3405 #endif /* !DISABLE_TLS */ 3406 || (f->f_type == F_FORW 3407 && !strcmp(f->f_un.f_forw.f_hname, 3408 f2->f_un.f_forw.f_hname)))) { 3409 DPRINTF(D_BUFFER, "move queue from f@%p " 3410 "to f2@%p\n", f, f2); 3411 MOVE_QUEUE(f2, f); 3412 } 3413 } 3414 message_queue_freeall(f); 3415 DELREF(f->f_prevmsg); 3416 #ifndef DISABLE_TLS 3417 if (f->f_type == F_TLS) 3418 free_tls_conn(f->f_un.f_tls.tls_conn); 3419 #endif /* !DISABLE_TLS */ 3420 FREEPTR(f->f_program); 3421 FREEPTR(f->f_host); 3422 DEL_EVENT(f->f_sq_event); 3423 free((char *)f); 3424 } 3425 Files = newf; 3426 Initialized = 1; 3427 3428 if (Debug) { 3429 for (f = Files; f; f = f->f_next) { 3430 for (i = 0; i <= LOG_NFACILITIES; i++) 3431 if (f->f_pmask[i] == INTERNAL_NOPRI) 3432 printf("X "); 3433 else 3434 printf("%d ", f->f_pmask[i]); 3435 printf("%s: ", TypeInfo[f->f_type].name); 3436 switch (f->f_type) { 3437 case F_FILE: 3438 case F_TTY: 3439 case F_CONSOLE: 3440 printf("%s", f->f_un.f_fname); 3441 break; 3442 3443 case F_FORW: 3444 printf("%s", f->f_un.f_forw.f_hname); 3445 break; 3446 #ifndef DISABLE_TLS 3447 case F_TLS: 3448 printf("[%s]", f->f_un.f_tls.tls_conn->hostname); 3449 break; 3450 #endif /* !DISABLE_TLS */ 3451 case F_PIPE: 3452 printf("%s", f->f_un.f_pipe.f_pname); 3453 break; 3454 3455 case F_USERS: 3456 for (i = 0; 3457 i < MAXUNAMES && *f->f_un.f_uname[i]; i++) 3458 printf("%s, ", f->f_un.f_uname[i]); 3459 break; 3460 } 3461 if (f->f_program != NULL) 3462 printf(" (%s)", f->f_program); 3463 printf("\n"); 3464 } 3465 } 3466 3467 finet = socksetup(PF_UNSPEC, bindhostname); 3468 if (finet) { 3469 if (SecureMode) { 3470 for (i = 0; i < finet->fd; i++) { 3471 if (shutdown(finet[i+1].fd, SHUT_RD) < 0) { 3472 logerror("shutdown() failed"); 3473 die(0, 0, NULL); 3474 } 3475 } 3476 } else 3477 DPRINTF(D_NET, "Listening on inet and/or inet6 socket\n"); 3478 DPRINTF(D_NET, "Sending on inet and/or inet6 socket\n"); 3479 } 3480 3481 #ifndef DISABLE_TLS 3482 /* TLS setup -- after all local destinations opened */ 3483 DPRINTF(D_PARSE, "Parsed options: tls_ca: %s, tls_cadir: %s, " 3484 "tls_cert: %s, tls_key: %s, tls_verify: %s, " 3485 "bind: %s:%s, max. queue_lengths: %" 3486 PRId64 ", %" PRId64 ", %" PRId64 ", " 3487 "max. queue_sizes: %" 3488 PRId64 ", %" PRId64 ", %" PRId64 "\n", 3489 tls_opt.CAfile, tls_opt.CAdir, 3490 tls_opt.certfile, tls_opt.keyfile, tls_opt.x509verify, 3491 tls_opt.bindhost, tls_opt.bindport, 3492 TypeInfo[F_TLS].queue_length, TypeInfo[F_FILE].queue_length, 3493 TypeInfo[F_PIPE].queue_length, 3494 TypeInfo[F_TLS].queue_size, TypeInfo[F_FILE].queue_size, 3495 TypeInfo[F_PIPE].queue_size); 3496 SLIST_FOREACH(cred, &tls_opt.cert_head, entries) { 3497 DPRINTF(D_PARSE, "Accepting peer certificate " 3498 "from file: \"%s\"\n", cred->data); 3499 } 3500 SLIST_FOREACH(cred, &tls_opt.fprint_head, entries) { 3501 DPRINTF(D_PARSE, "Accepting peer certificate with " 3502 "fingerprint: \"%s\"\n", cred->data); 3503 } 3504 3505 /* Note: The order of initialization is important because syslog-sign 3506 * should use the TLS cert for signing. -- So we check first if TLS 3507 * will be used and initialize it before starting -sign. 3508 * 3509 * This means that if we are a client without TLS destinations TLS 3510 * will not be initialized and syslog-sign will generate a new key. 3511 * -- Even if the user has set a usable tls_cert. 3512 * Is this the expected behaviour? The alternative would be to always 3513 * initialize the TLS structures, even if they will not be needed 3514 * (or only needed to read the DSA key for -sign). 3515 */ 3516 3517 /* Initialize TLS only if used */ 3518 if (tls_opt.server) 3519 tls_status_msg = init_global_TLS_CTX(); 3520 else 3521 for (f = Files; f; f = f->f_next) { 3522 if (f->f_type != F_TLS) 3523 continue; 3524 tls_status_msg = init_global_TLS_CTX(); 3525 break; 3526 } 3527 3528 #endif /* !DISABLE_TLS */ 3529 3530 #ifndef DISABLE_SIGN 3531 /* only initialize -sign if actually used */ 3532 if (GlobalSign.sg == 0 || GlobalSign.sg == 1 || GlobalSign.sg == 2) 3533 (void)sign_global_init(Files); 3534 else if (GlobalSign.sg == 3) 3535 for (f = Files; f; f = f->f_next) 3536 if (f->f_flags & FFLAG_SIGN) { 3537 (void)sign_global_init(Files); 3538 break; 3539 } 3540 #endif /* !DISABLE_SIGN */ 3541 3542 #ifndef DISABLE_TLS 3543 if (tls_status_msg) { 3544 loginfo(tls_status_msg); 3545 free(tls_status_msg); 3546 } 3547 DPRINTF((D_NET|D_TLS), "Preparing sockets for TLS\n"); 3548 TLS_Listen_Set = 3549 socksetup_tls(PF_UNSPEC, tls_opt.bindhost, tls_opt.bindport); 3550 3551 for (f = Files; f; f = f->f_next) { 3552 if (f->f_type != F_TLS) 3553 continue; 3554 if (!tls_connect(f->f_un.f_tls.tls_conn)) { 3555 logerror("Unable to connect to TLS server %s", 3556 f->f_un.f_tls.tls_conn->hostname); 3557 /* Reconnect after x seconds */ 3558 schedule_event(&f->f_un.f_tls.tls_conn->event, 3559 &((struct timeval){TLS_RECONNECT_SEC, 0}), 3560 tls_reconnect, f->f_un.f_tls.tls_conn); 3561 } 3562 } 3563 #endif /* !DISABLE_TLS */ 3564 3565 loginfo("restart"); 3566 /* 3567 * Log a change in hostname, but only on a restart (we detect this 3568 * by checking to see if we're passed a kevent). 3569 */ 3570 if (oldLocalFQDN && strcmp(oldLocalFQDN, LocalFQDN) != 0) 3571 loginfo("host name changed, \"%s\" to \"%s\"", 3572 oldLocalFQDN, LocalFQDN); 3573 3574 RESTORE_SIGNALS(omask); 3575 } 3576 3577 /* 3578 * Crack a configuration file line 3579 */ 3580 void 3581 cfline(size_t linenum, const char *line, struct filed *f, const char *prog, 3582 const char *host) 3583 { 3584 struct addrinfo hints, *res; 3585 int error, i, pri, syncfile; 3586 const char *p, *q; 3587 char *bp; 3588 char buf[MAXLINE]; 3589 3590 DPRINTF((D_CALL|D_PARSE), 3591 "cfline(%zu, \"%s\", f, \"%s\", \"%s\")\n", 3592 linenum, line, prog, host); 3593 3594 errno = 0; /* keep strerror() stuff out of logerror messages */ 3595 3596 /* clear out file entry */ 3597 memset(f, 0, sizeof(*f)); 3598 for (i = 0; i <= LOG_NFACILITIES; i++) 3599 f->f_pmask[i] = INTERNAL_NOPRI; 3600 STAILQ_INIT(&f->f_qhead); 3601 3602 /* 3603 * There should not be any space before the log facility. 3604 * Check this is okay, complain and fix if it is not. 3605 */ 3606 q = line; 3607 if (isblank((unsigned char)*line)) { 3608 errno = 0; 3609 logerror("Warning: `%s' space or tab before the log facility", 3610 line); 3611 /* Fix: strip all spaces/tabs before the log facility */ 3612 while (*q++ && isblank((unsigned char)*q)) 3613 /* skip blanks */; 3614 line = q; 3615 } 3616 3617 /* 3618 * q is now at the first char of the log facility 3619 * There should be at least one tab after the log facility 3620 * Check this is okay, and complain and fix if it is not. 3621 */ 3622 q = line + strlen(line); 3623 while (!isblank((unsigned char)*q) && (q != line)) 3624 q--; 3625 if ((q == line) && strlen(line)) { 3626 /* No tabs or space in a non empty line: complain */ 3627 errno = 0; 3628 logerror( 3629 "Error: `%s' log facility or log target missing", 3630 line); 3631 return; 3632 } 3633 3634 /* save host name, if any */ 3635 if (*host == '*') 3636 f->f_host = NULL; 3637 else { 3638 f->f_host = strdup(host); 3639 trim_anydomain(f->f_host); 3640 } 3641 3642 /* save program name, if any */ 3643 if (*prog == '*') 3644 f->f_program = NULL; 3645 else 3646 f->f_program = strdup(prog); 3647 3648 /* scan through the list of selectors */ 3649 for (p = line; *p && !isblank((unsigned char)*p);) { 3650 int pri_done, pri_cmp, pri_invert; 3651 3652 /* find the end of this facility name list */ 3653 for (q = p; *q && !isblank((unsigned char)*q) && *q++ != '.'; ) 3654 continue; 3655 3656 /* get the priority comparison */ 3657 pri_cmp = 0; 3658 pri_done = 0; 3659 pri_invert = 0; 3660 if (*q == '!') { 3661 pri_invert = 1; 3662 q++; 3663 } 3664 while (! pri_done) { 3665 switch (*q) { 3666 case '<': 3667 pri_cmp = PRI_LT; 3668 q++; 3669 break; 3670 case '=': 3671 pri_cmp = PRI_EQ; 3672 q++; 3673 break; 3674 case '>': 3675 pri_cmp = PRI_GT; 3676 q++; 3677 break; 3678 default: 3679 pri_done = 1; 3680 break; 3681 } 3682 } 3683 3684 /* collect priority name */ 3685 for (bp = buf; *q && !strchr("\t ,;", *q); ) 3686 *bp++ = *q++; 3687 *bp = '\0'; 3688 3689 /* skip cruft */ 3690 while (strchr(",;", *q)) 3691 q++; 3692 3693 /* decode priority name */ 3694 if (*buf == '*') { 3695 pri = LOG_PRIMASK + 1; 3696 pri_cmp = PRI_LT | PRI_EQ | PRI_GT; 3697 } else { 3698 pri = decode(buf, prioritynames); 3699 if (pri < 0) { 3700 errno = 0; 3701 logerror("Unknown priority name `%s'", buf); 3702 return; 3703 } 3704 } 3705 if (pri_cmp == 0) 3706 pri_cmp = UniquePriority ? PRI_EQ 3707 : PRI_EQ | PRI_GT; 3708 if (pri_invert) 3709 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT; 3710 3711 /* scan facilities */ 3712 while (*p && !strchr("\t .;", *p)) { 3713 for (bp = buf; *p && !strchr("\t ,;.", *p); ) 3714 *bp++ = *p++; 3715 *bp = '\0'; 3716 if (*buf == '*') 3717 for (i = 0; i < LOG_NFACILITIES; i++) { 3718 f->f_pmask[i] = pri; 3719 f->f_pcmp[i] = pri_cmp; 3720 } 3721 else { 3722 i = decode(buf, facilitynames); 3723 if (i < 0) { 3724 errno = 0; 3725 logerror("Unknown facility name `%s'", 3726 buf); 3727 return; 3728 } 3729 f->f_pmask[i >> 3] = pri; 3730 f->f_pcmp[i >> 3] = pri_cmp; 3731 } 3732 while (*p == ',' || *p == ' ') 3733 p++; 3734 } 3735 3736 p = q; 3737 } 3738 3739 /* skip to action part */ 3740 while (isblank((unsigned char)*p)) 3741 p++; 3742 3743 /* 3744 * should this be "#ifndef DISABLE_SIGN" or is it a general option? 3745 * '+' before file destination: write with PRI field for later 3746 * verification 3747 */ 3748 if (*p == '+') { 3749 f->f_flags |= FFLAG_FULL; 3750 p++; 3751 } 3752 if (*p == '-') { 3753 syncfile = 0; 3754 p++; 3755 } else 3756 syncfile = 1; 3757 3758 switch (*p) { 3759 case '@': 3760 #ifndef DISABLE_SIGN 3761 if (GlobalSign.sg == 3) 3762 f->f_flags |= FFLAG_SIGN; 3763 #endif /* !DISABLE_SIGN */ 3764 #ifndef DISABLE_TLS 3765 if (*(p+1) == '[') { 3766 /* TLS destination */ 3767 if (!parse_tls_destination(p, f, linenum)) { 3768 logerror("Unable to parse action %s", p); 3769 break; 3770 } 3771 f->f_type = F_TLS; 3772 break; 3773 } 3774 #endif /* !DISABLE_TLS */ 3775 (void)strlcpy(f->f_un.f_forw.f_hname, ++p, 3776 sizeof(f->f_un.f_forw.f_hname)); 3777 memset(&hints, 0, sizeof(hints)); 3778 hints.ai_family = AF_UNSPEC; 3779 hints.ai_socktype = SOCK_DGRAM; 3780 hints.ai_protocol = 0; 3781 error = getaddrinfo(f->f_un.f_forw.f_hname, "syslog", &hints, 3782 &res); 3783 if (error) { 3784 logerror(gai_strerror(error)); 3785 break; 3786 } 3787 f->f_un.f_forw.f_addr = res; 3788 f->f_type = F_FORW; 3789 NumForwards++; 3790 break; 3791 3792 case '/': 3793 #ifndef DISABLE_SIGN 3794 if (GlobalSign.sg == 3) 3795 f->f_flags |= FFLAG_SIGN; 3796 #endif /* !DISABLE_SIGN */ 3797 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname)); 3798 if ((f->f_file = open(p, O_WRONLY|O_APPEND, 0)) < 0) { 3799 f->f_type = F_UNUSED; 3800 logerror(p); 3801 break; 3802 } 3803 if (syncfile) 3804 f->f_flags |= FFLAG_SYNC; 3805 if (isatty(f->f_file)) 3806 f->f_type = F_TTY; 3807 else 3808 f->f_type = F_FILE; 3809 if (strcmp(p, ctty) == 0) 3810 f->f_type = F_CONSOLE; 3811 break; 3812 3813 case '|': 3814 if (GlobalSign.sg == 3) 3815 f->f_flags |= FFLAG_SIGN; 3816 f->f_un.f_pipe.f_pid = 0; 3817 (void) strlcpy(f->f_un.f_pipe.f_pname, p + 1, 3818 sizeof(f->f_un.f_pipe.f_pname)); 3819 f->f_type = F_PIPE; 3820 break; 3821 3822 case '*': 3823 f->f_type = F_WALL; 3824 break; 3825 3826 default: 3827 for (i = 0; i < MAXUNAMES && *p; i++) { 3828 for (q = p; *q && *q != ','; ) 3829 q++; 3830 (void)strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE); 3831 if ((q - p) > UT_NAMESIZE) 3832 f->f_un.f_uname[i][UT_NAMESIZE] = '\0'; 3833 else 3834 f->f_un.f_uname[i][q - p] = '\0'; 3835 while (*q == ',' || *q == ' ') 3836 q++; 3837 p = q; 3838 } 3839 f->f_type = F_USERS; 3840 break; 3841 } 3842 } 3843 3844 3845 /* 3846 * Decode a symbolic name to a numeric value 3847 */ 3848 int 3849 decode(const char *name, CODE *codetab) 3850 { 3851 CODE *c; 3852 char *p, buf[40]; 3853 3854 if (isdigit((unsigned char)*name)) 3855 return atoi(name); 3856 3857 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) { 3858 if (isupper((unsigned char)*name)) 3859 *p = tolower((unsigned char)*name); 3860 else 3861 *p = *name; 3862 } 3863 *p = '\0'; 3864 for (c = codetab; c->c_name; c++) 3865 if (!strcmp(buf, c->c_name)) 3866 return c->c_val; 3867 3868 return -1; 3869 } 3870 3871 /* 3872 * Retrieve the size of the kernel message buffer, via sysctl. 3873 */ 3874 int 3875 getmsgbufsize(void) 3876 { 3877 #ifdef __NetBSD_Version__ 3878 int msgbufsize, mib[2]; 3879 size_t size; 3880 3881 mib[0] = CTL_KERN; 3882 mib[1] = KERN_MSGBUFSIZE; 3883 size = sizeof msgbufsize; 3884 if (sysctl(mib, 2, &msgbufsize, &size, NULL, 0) == -1) { 3885 DPRINTF(D_MISC, "Couldn't get kern.msgbufsize\n"); 3886 return 0; 3887 } 3888 return msgbufsize; 3889 #else 3890 return MAXLINE; 3891 #endif /* __NetBSD_Version__ */ 3892 } 3893 3894 /* 3895 * Retrieve the hostname, via sysctl. 3896 */ 3897 char * 3898 getLocalFQDN(void) 3899 { 3900 int mib[2]; 3901 char *hostname; 3902 size_t len; 3903 3904 mib[0] = CTL_KERN; 3905 mib[1] = KERN_HOSTNAME; 3906 sysctl(mib, 2, NULL, &len, NULL, 0); 3907 3908 if (!(hostname = malloc(len))) { 3909 logerror("Unable to allocate memory"); 3910 die(0,0,NULL); 3911 } else if (sysctl(mib, 2, hostname, &len, NULL, 0) == -1) { 3912 DPRINTF(D_MISC, "Couldn't get kern.hostname\n"); 3913 (void)gethostname(hostname, sizeof(len)); 3914 } 3915 return hostname; 3916 } 3917 3918 struct socketEvent * 3919 socksetup(int af, const char *hostname) 3920 { 3921 struct addrinfo hints, *res, *r; 3922 int error, maxs; 3923 int on = 1; 3924 struct socketEvent *s, *socks; 3925 3926 if(SecureMode && !NumForwards) 3927 return NULL; 3928 3929 memset(&hints, 0, sizeof(hints)); 3930 hints.ai_flags = AI_PASSIVE; 3931 hints.ai_family = af; 3932 hints.ai_socktype = SOCK_DGRAM; 3933 error = getaddrinfo(hostname, "syslog", &hints, &res); 3934 if (error) { 3935 logerror(gai_strerror(error)); 3936 errno = 0; 3937 die(0, 0, NULL); 3938 } 3939 3940 /* Count max number of sockets we may open */ 3941 for (maxs = 0, r = res; r; r = r->ai_next, maxs++) 3942 continue; 3943 socks = calloc(maxs+1, sizeof(*socks)); 3944 if (!socks) { 3945 logerror("Couldn't allocate memory for sockets"); 3946 die(0, 0, NULL); 3947 } 3948 3949 socks->fd = 0; /* num of sockets counter at start of array */ 3950 s = socks + 1; 3951 for (r = res; r; r = r->ai_next) { 3952 s->fd = socket(r->ai_family, r->ai_socktype, r->ai_protocol); 3953 if (s->fd < 0) { 3954 logerror("socket() failed"); 3955 continue; 3956 } 3957 if (r->ai_family == AF_INET6 && setsockopt(s->fd, IPPROTO_IPV6, 3958 IPV6_V6ONLY, &on, sizeof(on)) < 0) { 3959 logerror("setsockopt(IPV6_V6ONLY) failed"); 3960 close(s->fd); 3961 continue; 3962 } 3963 3964 if (!SecureMode) { 3965 if (bind(s->fd, r->ai_addr, r->ai_addrlen) < 0) { 3966 logerror("bind() failed"); 3967 close(s->fd); 3968 continue; 3969 } 3970 s->ev = allocev(); 3971 event_set(s->ev, s->fd, EV_READ | EV_PERSIST, 3972 dispatch_read_finet, s->ev); 3973 if (event_add(s->ev, NULL) == -1) { 3974 DPRINTF((D_EVENT|D_NET), 3975 "Failure in event_add()\n"); 3976 } else { 3977 DPRINTF((D_EVENT|D_NET), 3978 "Listen on UDP port " 3979 "(event@%p)\n", s->ev); 3980 } 3981 } 3982 3983 socks->fd++; /* num counter */ 3984 s++; 3985 } 3986 3987 if (res) 3988 freeaddrinfo(res); 3989 if (socks->fd == 0) { 3990 free (socks); 3991 if(Debug) 3992 return NULL; 3993 else 3994 die(0, 0, NULL); 3995 } 3996 return socks; 3997 } 3998 3999 /* 4000 * Fairly similar to popen(3), but returns an open descriptor, as opposed 4001 * to a FILE *. 4002 */ 4003 int 4004 p_open(char *prog, pid_t *rpid) 4005 { 4006 static char sh[] = "sh", mc[] = "-c"; 4007 int pfd[2], nulldesc, i; 4008 pid_t pid; 4009 char *argv[4]; /* sh -c cmd NULL */ 4010 char errmsg[200]; 4011 4012 if (pipe(pfd) == -1) 4013 return -1; 4014 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1) { 4015 /* We are royally screwed anyway. */ 4016 return -1; 4017 } 4018 4019 switch ((pid = fork())) { 4020 case -1: 4021 (void) close(nulldesc); 4022 return -1; 4023 4024 case 0: 4025 argv[0] = sh; 4026 argv[1] = mc; 4027 argv[2] = prog; 4028 argv[3] = NULL; 4029 4030 (void) setsid(); /* avoid catching SIGHUPs. */ 4031 4032 /* 4033 * Reset ignored signals to their default behavior. 4034 */ 4035 (void)signal(SIGTERM, SIG_DFL); 4036 (void)signal(SIGINT, SIG_DFL); 4037 (void)signal(SIGQUIT, SIG_DFL); 4038 (void)signal(SIGPIPE, SIG_DFL); 4039 (void)signal(SIGHUP, SIG_DFL); 4040 4041 dup2(pfd[0], STDIN_FILENO); 4042 dup2(nulldesc, STDOUT_FILENO); 4043 dup2(nulldesc, STDERR_FILENO); 4044 for (i = getdtablesize(); i > 2; i--) 4045 (void) close(i); 4046 4047 (void) execvp(_PATH_BSHELL, argv); 4048 _exit(255); 4049 } 4050 4051 (void) close(nulldesc); 4052 (void) close(pfd[0]); 4053 4054 /* 4055 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are 4056 * supposed to get an EWOULDBLOCK on writev(2), which is 4057 * caught by the logic above anyway, which will in turn 4058 * close the pipe, and fork a new logging subprocess if 4059 * necessary. The stale subprocess will be killed some 4060 * time later unless it terminated itself due to closing 4061 * its input pipe. 4062 */ 4063 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) { 4064 /* This is bad. */ 4065 (void) snprintf(errmsg, sizeof(errmsg), 4066 "Warning: cannot change pipe to pid %d to " 4067 "non-blocking.", (int) pid); 4068 logerror(errmsg); 4069 } 4070 *rpid = pid; 4071 return pfd[1]; 4072 } 4073 4074 void 4075 deadq_enter(pid_t pid, const char *name) 4076 { 4077 dq_t p; 4078 int status; 4079 4080 /* 4081 * Be paranoid: if we can't signal the process, don't enter it 4082 * into the dead queue (perhaps it's already dead). If possible, 4083 * we try to fetch and log the child's status. 4084 */ 4085 if (kill(pid, 0) != 0) { 4086 if (waitpid(pid, &status, WNOHANG) > 0) 4087 log_deadchild(pid, status, name); 4088 return; 4089 } 4090 4091 p = malloc(sizeof(*p)); 4092 if (p == NULL) { 4093 errno = 0; 4094 logerror("panic: out of memory!"); 4095 exit(1); 4096 } 4097 4098 p->dq_pid = pid; 4099 p->dq_timeout = DQ_TIMO_INIT; 4100 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries); 4101 } 4102 4103 int 4104 deadq_remove(pid_t pid) 4105 { 4106 dq_t q; 4107 4108 for (q = TAILQ_FIRST(&deadq_head); q != NULL; 4109 q = TAILQ_NEXT(q, dq_entries)) { 4110 if (q->dq_pid == pid) { 4111 TAILQ_REMOVE(&deadq_head, q, dq_entries); 4112 free(q); 4113 return 1; 4114 } 4115 } 4116 return 0; 4117 } 4118 4119 void 4120 log_deadchild(pid_t pid, int status, const char *name) 4121 { 4122 int code; 4123 char buf[256]; 4124 const char *reason; 4125 4126 /* Keep strerror() struff out of logerror messages. */ 4127 errno = 0; 4128 if (WIFSIGNALED(status)) { 4129 reason = "due to signal"; 4130 code = WTERMSIG(status); 4131 } else { 4132 reason = "with status"; 4133 code = WEXITSTATUS(status); 4134 if (code == 0) 4135 return; 4136 } 4137 (void) snprintf(buf, sizeof(buf), 4138 "Logging subprocess %d (%s) exited %s %d.", 4139 pid, name, reason, code); 4140 logerror(buf); 4141 } 4142 4143 struct event * 4144 allocev(void) 4145 { 4146 struct event *ev; 4147 4148 if (!(ev = calloc(1, sizeof(*ev)))) 4149 logerror("Unable to allocate memory"); 4150 return ev; 4151 } 4152 4153 /* *ev is allocated if necessary */ 4154 void 4155 schedule_event(struct event **ev, struct timeval *tv, 4156 void (*cb)(int, short, void *), void *arg) 4157 { 4158 if (!*ev && !(*ev = allocev())) { 4159 return; 4160 } 4161 event_set(*ev, 0, 0, cb, arg); 4162 DPRINTF(D_EVENT, "event_add(%s@%p)\n", "schedule_ev", *ev); \ 4163 if (event_add(*ev, tv) == -1) { 4164 DPRINTF(D_EVENT, "Failure in event_add()\n"); 4165 } 4166 } 4167 4168 #ifndef DISABLE_TLS 4169 /* abbreviation for freeing credential lists */ 4170 void 4171 free_cred_SLIST(struct peer_cred_head *head) 4172 { 4173 struct peer_cred *cred; 4174 4175 while (!SLIST_EMPTY(head)) { 4176 cred = SLIST_FIRST(head); 4177 SLIST_REMOVE_HEAD(head, entries); 4178 FREEPTR(cred->data); 4179 free(cred); 4180 } 4181 } 4182 #endif /* !DISABLE_TLS */ 4183 4184 /* 4185 * send message queue after reconnect 4186 */ 4187 /*ARGSUSED*/ 4188 void 4189 send_queue(int fd, short event, void *arg) 4190 { 4191 struct filed *f = (struct filed *) arg; 4192 struct buf_queue *qentry; 4193 #define SQ_CHUNK_SIZE 250 4194 size_t cnt = 0; 4195 4196 if (f->f_type == F_TLS) { 4197 /* use a flag to prevent recursive calls to send_queue() */ 4198 if (f->f_un.f_tls.tls_conn->send_queue) 4199 return; 4200 else 4201 f->f_un.f_tls.tls_conn->send_queue = true; 4202 } 4203 DPRINTF((D_DATA|D_CALL), "send_queue(f@%p with %zu msgs, " 4204 "cnt@%p = %zu)\n", f, f->f_qelements, &cnt, cnt); 4205 4206 while ((qentry = STAILQ_FIRST(&f->f_qhead))) { 4207 #ifndef DISABLE_TLS 4208 /* send_queue() might be called with an unconnected destination 4209 * from init() or die() or one message might take longer, 4210 * leaving the connection in state ST_WAITING and thus not 4211 * ready for the next message. 4212 * this check is a shortcut to skip these unnecessary calls */ 4213 if (f->f_type == F_TLS 4214 && f->f_un.f_tls.tls_conn->state != ST_TLS_EST) { 4215 DPRINTF(D_TLS, "abort send_queue(cnt@%p = %zu) " 4216 "on TLS connection in state %d\n", 4217 &cnt, cnt, f->f_un.f_tls.tls_conn->state); 4218 return; 4219 } 4220 #endif /* !DISABLE_TLS */ 4221 fprintlog(f, qentry->msg, qentry); 4222 4223 /* Sending a long queue can take some time during which 4224 * SIGHUP and SIGALRM are blocked and no events are handled. 4225 * To avoid that we only send SQ_CHUNK_SIZE messages at once 4226 * and then reschedule ourselves to continue. Thus the control 4227 * will return first from all signal-protected functions so a 4228 * possible SIGHUP/SIGALRM is handled and then back to the 4229 * main loop which can handle possible input. 4230 */ 4231 if (++cnt >= SQ_CHUNK_SIZE) { 4232 if (!f->f_sq_event) { /* alloc on demand */ 4233 f->f_sq_event = allocev(); 4234 event_set(f->f_sq_event, 0, 0, send_queue, f); 4235 } 4236 if (event_add(f->f_sq_event, &((struct timeval){0, 1})) == -1) { 4237 DPRINTF(D_EVENT, "Failure in event_add()\n"); 4238 } 4239 break; 4240 } 4241 } 4242 if (f->f_type == F_TLS) 4243 f->f_un.f_tls.tls_conn->send_queue = false; 4244 } 4245 4246 /* 4247 * finds the next queue element to delete 4248 * 4249 * has stateful behaviour, before using it call once with reset = true 4250 * after that every call will return one next queue elemen to delete, 4251 * depending on strategy either the oldest or the one with the lowest priority 4252 */ 4253 static struct buf_queue * 4254 find_qentry_to_delete(const struct buf_queue_head *head, int strategy, 4255 bool reset) 4256 { 4257 static int pri; 4258 static struct buf_queue *qentry_static; 4259 4260 struct buf_queue *qentry_tmp; 4261 4262 if (reset || STAILQ_EMPTY(head)) { 4263 pri = LOG_DEBUG; 4264 qentry_static = STAILQ_FIRST(head); 4265 return NULL; 4266 } 4267 4268 /* find elements to delete */ 4269 if (strategy == PURGE_BY_PRIORITY) { 4270 qentry_tmp = qentry_static; 4271 while ((qentry_tmp = STAILQ_NEXT(qentry_tmp, entries)) != NULL) 4272 { 4273 if (LOG_PRI(qentry_tmp->msg->pri) == pri) { 4274 /* save the successor, because qentry_tmp 4275 * is probably deleted by the caller */ 4276 qentry_static = STAILQ_NEXT(qentry_tmp, entries); 4277 return qentry_tmp; 4278 } 4279 } 4280 /* nothing found in while loop --> next pri */ 4281 if (--pri) 4282 return find_qentry_to_delete(head, strategy, false); 4283 else 4284 return NULL; 4285 } else /* strategy == PURGE_OLDEST or other value */ { 4286 qentry_tmp = qentry_static; 4287 qentry_static = STAILQ_NEXT(qentry_tmp, entries); 4288 return qentry_tmp; /* is NULL on empty queue */ 4289 } 4290 } 4291 4292 /* note on TAILQ: newest message added at TAIL, 4293 * oldest to be removed is FIRST 4294 */ 4295 /* 4296 * checks length of a destination's message queue 4297 * if del_entries == 0 then assert queue length is 4298 * less or equal to configured number of queue elements 4299 * otherwise del_entries tells how many entries to delete 4300 * 4301 * returns the number of removed queue elements 4302 * (which not necessarily means free'd messages) 4303 * 4304 * strategy PURGE_OLDEST to delete oldest entry, e.g. after it was resent 4305 * strategy PURGE_BY_PRIORITY to delete messages with lowest priority first, 4306 * this is much slower but might be desirable when unsent messages have 4307 * to be deleted, e.g. in call from domark() 4308 */ 4309 size_t 4310 message_queue_purge(struct filed *f, size_t del_entries, int strategy) 4311 { 4312 int removed = 0; 4313 struct buf_queue *qentry = NULL; 4314 4315 DPRINTF((D_CALL|D_BUFFER), "purge_message_queue(%p, %zu, %d) with " 4316 "f_qelements=%zu and f_qsize=%zu\n", 4317 f, del_entries, strategy, 4318 f->f_qelements, f->f_qsize); 4319 4320 /* reset state */ 4321 (void)find_qentry_to_delete(&f->f_qhead, strategy, true); 4322 4323 while (removed < del_entries 4324 || (TypeInfo[f->f_type].queue_length != -1 4325 && TypeInfo[f->f_type].queue_length > f->f_qelements) 4326 || (TypeInfo[f->f_type].queue_size != -1 4327 && TypeInfo[f->f_type].queue_size > f->f_qsize)) { 4328 qentry = find_qentry_to_delete(&f->f_qhead, strategy, 0); 4329 if (message_queue_remove(f, qentry)) 4330 removed++; 4331 else 4332 break; 4333 } 4334 return removed; 4335 } 4336 4337 /* run message_queue_purge() for all destinations to free memory */ 4338 size_t 4339 message_allqueues_purge(void) 4340 { 4341 size_t sum = 0; 4342 struct filed *f; 4343 4344 for (f = Files; f; f = f->f_next) 4345 sum += message_queue_purge(f, 4346 f->f_qelements/10, PURGE_BY_PRIORITY); 4347 4348 DPRINTF(D_BUFFER, 4349 "message_allqueues_purge(): removed %zu buffer entries\n", sum); 4350 return sum; 4351 } 4352 4353 /* run message_queue_purge() for all destinations to check limits */ 4354 size_t 4355 message_allqueues_check(void) 4356 { 4357 size_t sum = 0; 4358 struct filed *f; 4359 4360 for (f = Files; f; f = f->f_next) 4361 sum += message_queue_purge(f, 0, PURGE_BY_PRIORITY); 4362 DPRINTF(D_BUFFER, 4363 "message_allqueues_check(): removed %zu buffer entries\n", sum); 4364 return sum; 4365 } 4366 4367 struct buf_msg * 4368 buf_msg_new(const size_t len) 4369 { 4370 struct buf_msg *newbuf; 4371 4372 CALLOC(newbuf, sizeof(*newbuf)); 4373 4374 if (len) { /* len = 0 is valid */ 4375 MALLOC(newbuf->msg, len); 4376 newbuf->msgorig = newbuf->msg; 4377 newbuf->msgsize = len; 4378 } 4379 return NEWREF(newbuf); 4380 } 4381 4382 void 4383 buf_msg_free(struct buf_msg *buf) 4384 { 4385 if (!buf) 4386 return; 4387 4388 buf->refcount--; 4389 if (buf->refcount == 0) { 4390 FREEPTR(buf->timestamp); 4391 /* small optimizations: the host/recvhost may point to the 4392 * global HostName/FQDN. of course this must not be free()d 4393 * same goes for appname and include_pid 4394 */ 4395 if (buf->recvhost != buf->host 4396 && buf->recvhost != LocalHostName 4397 && buf->recvhost != LocalFQDN 4398 && buf->recvhost != oldLocalFQDN) 4399 FREEPTR(buf->recvhost); 4400 if (buf->host != LocalHostName 4401 && buf->host != LocalFQDN 4402 && buf->host != oldLocalFQDN) 4403 FREEPTR(buf->host); 4404 if (buf->prog != appname) 4405 FREEPTR(buf->prog); 4406 if (buf->pid != include_pid) 4407 FREEPTR(buf->pid); 4408 FREEPTR(buf->msgid); 4409 FREEPTR(buf->sd); 4410 FREEPTR(buf->msgorig); /* instead of msg */ 4411 FREEPTR(buf); 4412 } 4413 } 4414 4415 size_t 4416 buf_queue_obj_size(struct buf_queue *qentry) 4417 { 4418 size_t sum = 0; 4419 4420 if (!qentry) 4421 return 0; 4422 sum += sizeof(*qentry) 4423 + sizeof(*qentry->msg) 4424 + qentry->msg->msgsize 4425 + SAFEstrlen(qentry->msg->timestamp)+1 4426 + SAFEstrlen(qentry->msg->msgid)+1; 4427 if (qentry->msg->prog 4428 && qentry->msg->prog != include_pid) 4429 sum += strlen(qentry->msg->prog)+1; 4430 if (qentry->msg->pid 4431 && qentry->msg->pid != appname) 4432 sum += strlen(qentry->msg->pid)+1; 4433 if (qentry->msg->recvhost 4434 && qentry->msg->recvhost != LocalHostName 4435 && qentry->msg->recvhost != LocalFQDN 4436 && qentry->msg->recvhost != oldLocalFQDN) 4437 sum += strlen(qentry->msg->recvhost)+1; 4438 if (qentry->msg->host 4439 && qentry->msg->host != LocalHostName 4440 && qentry->msg->host != LocalFQDN 4441 && qentry->msg->host != oldLocalFQDN) 4442 sum += strlen(qentry->msg->host)+1; 4443 4444 return sum; 4445 } 4446 4447 bool 4448 message_queue_remove(struct filed *f, struct buf_queue *qentry) 4449 { 4450 if (!f || !qentry || !qentry->msg) 4451 return false; 4452 4453 assert(!STAILQ_EMPTY(&f->f_qhead)); 4454 STAILQ_REMOVE(&f->f_qhead, qentry, buf_queue, entries); 4455 f->f_qelements--; 4456 f->f_qsize -= buf_queue_obj_size(qentry); 4457 4458 DPRINTF(D_BUFFER, "msg @%p removed from queue @%p, new qlen = %zu\n", 4459 qentry->msg, f, f->f_qelements); 4460 DELREF(qentry->msg); 4461 FREEPTR(qentry); 4462 return true; 4463 } 4464 4465 /* 4466 * returns *qentry on success and NULL on error 4467 */ 4468 struct buf_queue * 4469 message_queue_add(struct filed *f, struct buf_msg *buffer) 4470 { 4471 struct buf_queue *qentry; 4472 4473 /* check on every call or only every n-th time? */ 4474 message_queue_purge(f, 0, PURGE_BY_PRIORITY); 4475 4476 while (!(qentry = malloc(sizeof(*qentry))) 4477 && message_queue_purge(f, 1, PURGE_OLDEST)) 4478 continue; 4479 if (!qentry) { 4480 logerror("Unable to allocate memory"); 4481 DPRINTF(D_BUFFER, "queue empty, no memory, msg dropped\n"); 4482 return NULL; 4483 } else { 4484 qentry->msg = buffer; 4485 f->f_qelements++; 4486 f->f_qsize += buf_queue_obj_size(qentry); 4487 STAILQ_INSERT_TAIL(&f->f_qhead, qentry, entries); 4488 4489 DPRINTF(D_BUFFER, "msg @%p queued @%p, qlen = %zu\n", 4490 buffer, f, f->f_qelements); 4491 return qentry; 4492 } 4493 } 4494 4495 void 4496 message_queue_freeall(struct filed *f) 4497 { 4498 struct buf_queue *qentry; 4499 4500 if (!f) return; 4501 DPRINTF(D_MEM, "message_queue_freeall(f@%p) with f_qhead@%p\n", f, 4502 &f->f_qhead); 4503 4504 while (!STAILQ_EMPTY(&f->f_qhead)) { 4505 qentry = STAILQ_FIRST(&f->f_qhead); 4506 STAILQ_REMOVE(&f->f_qhead, qentry, buf_queue, entries); 4507 DELREF(qentry->msg); 4508 FREEPTR(qentry); 4509 } 4510 4511 f->f_qelements = 0; 4512 f->f_qsize = 0; 4513 } 4514 4515 #ifndef DISABLE_TLS 4516 /* utility function for tls_reconnect() */ 4517 struct filed * 4518 get_f_by_conninfo(struct tls_conn_settings *conn_info) 4519 { 4520 struct filed *f; 4521 4522 for (f = Files; f; f = f->f_next) { 4523 if ((f->f_type == F_TLS) && f->f_un.f_tls.tls_conn == conn_info) 4524 return f; 4525 } 4526 DPRINTF(D_TLS, "get_f_by_conninfo() called on invalid conn_info\n"); 4527 return NULL; 4528 } 4529 4530 /* 4531 * Called on signal. 4532 * Lets the admin reconnect without waiting for the reconnect timer expires. 4533 */ 4534 /*ARGSUSED*/ 4535 void 4536 dispatch_force_tls_reconnect(int fd, short event, void *ev) 4537 { 4538 struct filed *f; 4539 DPRINTF((D_TLS|D_CALL|D_EVENT), "dispatch_force_tls_reconnect()\n"); 4540 for (f = Files; f; f = f->f_next) { 4541 if (f->f_type == F_TLS && 4542 f->f_un.f_tls.tls_conn->state == ST_NONE) 4543 tls_reconnect(fd, event, f->f_un.f_tls.tls_conn); 4544 } 4545 } 4546 #endif /* !DISABLE_TLS */ 4547 4548 /* 4549 * return a timestamp in a static buffer, 4550 * either format the timestamp given by parameter in_now 4551 * or use the current time if in_now is NULL. 4552 */ 4553 char * 4554 make_timestamp(time_t *in_now, bool iso) 4555 { 4556 int frac_digits = 6; 4557 struct timeval tv; 4558 time_t mytime; 4559 struct tm ltime; 4560 int len = 0; 4561 int tzlen = 0; 4562 /* uses global var: time_t now; */ 4563 4564 if (in_now) { 4565 mytime = *in_now; 4566 } else { 4567 gettimeofday(&tv, NULL); 4568 mytime = now = (time_t) tv.tv_sec; 4569 } 4570 4571 if (!iso) { 4572 strlcpy(timestamp, ctime(&mytime) + 4, TIMESTAMPBUFSIZE); 4573 timestamp[BSD_TIMESTAMPLEN] = '\0'; 4574 return timestamp; 4575 } 4576 4577 localtime_r(&mytime, <ime); 4578 len += strftime(timestamp, TIMESTAMPBUFSIZE, "%FT%T", <ime); 4579 snprintf(&(timestamp[len]), frac_digits+2, ".%.*ld", 4580 frac_digits, (long)tv.tv_usec); 4581 len += frac_digits+1; 4582 tzlen = strftime(&(timestamp[len]), TIMESTAMPBUFSIZE-len, "%z", <ime); 4583 len += tzlen; 4584 4585 if (tzlen == 5) { 4586 /* strftime gives "+0200", but we need "+02:00" */ 4587 timestamp[len+1] = timestamp[len]; 4588 timestamp[len] = timestamp[len-1]; 4589 timestamp[len-1] = timestamp[len-2]; 4590 timestamp[len-2] = ':'; 4591 } 4592 return timestamp; 4593 } 4594 4595 /* auxillary code to allocate memory and copy a string */ 4596 bool 4597 copy_string(char **mem, const char *p, const char *q) 4598 { 4599 const size_t len = 1 + q - p; 4600 if (!(*mem = malloc(len))) { 4601 logerror("Unable to allocate memory for config"); 4602 return false; 4603 } 4604 strlcpy(*mem, p, len); 4605 return true; 4606 } 4607 4608 /* keyword has to end with ", everything until next " is copied */ 4609 bool 4610 copy_config_value_quoted(const char *keyword, char **mem, const char **p) 4611 { 4612 const char *q; 4613 if (strncasecmp(*p, keyword, strlen(keyword))) 4614 return false; 4615 q = *p += strlen(keyword); 4616 if (!(q = strchr(*p, '"'))) { 4617 logerror("unterminated \"\n"); 4618 return false; 4619 } 4620 if (!(copy_string(mem, *p, q))) 4621 return false; 4622 *p = ++q; 4623 return true; 4624 } 4625 4626 /* for config file: 4627 * following = required but whitespace allowed, quotes optional 4628 * if numeric, then conversion to integer and no memory allocation 4629 */ 4630 bool 4631 copy_config_value(const char *keyword, char **mem, 4632 const char **p, const char *file, int line) 4633 { 4634 if (strncasecmp(*p, keyword, strlen(keyword))) 4635 return false; 4636 *p += strlen(keyword); 4637 4638 while (isspace((unsigned char)**p)) 4639 *p += 1; 4640 if (**p != '=') { 4641 logerror("expected \"=\" in file %s, line %d", file, line); 4642 return false; 4643 } 4644 *p += 1; 4645 4646 return copy_config_value_word(mem, p); 4647 } 4648 4649 /* copy next parameter from a config line */ 4650 bool 4651 copy_config_value_word(char **mem, const char **p) 4652 { 4653 const char *q; 4654 while (isspace((unsigned char)**p)) 4655 *p += 1; 4656 if (**p == '"') 4657 return copy_config_value_quoted("\"", mem, p); 4658 4659 /* without quotes: find next whitespace or end of line */ 4660 (void)((q = strchr(*p, ' ')) || (q = strchr(*p, '\t')) 4661 || (q = strchr(*p, '\n')) || (q = strchr(*p, '\0'))); 4662 4663 if (q-*p == 0 || !(copy_string(mem, *p, q))) 4664 return false; 4665 4666 *p = ++q; 4667 return true; 4668 } 4669