1 /* $NetBSD: syslogd.c,v 1.119 2013/11/27 20:48:28 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 1.119 2013/11/27 20:48:28 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 <sys/stat.h> 74 #include <poll.h> 75 #include "syslogd.h" 76 #include "extern.h" 77 78 #ifndef DISABLE_SIGN 79 #include "sign.h" 80 struct sign_global_t GlobalSign = { 81 .rsid = 0, 82 .sig2_delims = STAILQ_HEAD_INITIALIZER(GlobalSign.sig2_delims) 83 }; 84 #endif /* !DISABLE_SIGN */ 85 86 #ifndef DISABLE_TLS 87 #include "tls.h" 88 #endif /* !DISABLE_TLS */ 89 90 #ifdef LIBWRAP 91 int allow_severity = LOG_AUTH|LOG_INFO; 92 int deny_severity = LOG_AUTH|LOG_WARNING; 93 #endif 94 95 const char *ConfFile = _PATH_LOGCONF; 96 char ctty[] = _PATH_CONSOLE; 97 98 /* 99 * Queue of about-to-be-dead processes we should watch out for. 100 */ 101 TAILQ_HEAD(, deadq_entry) deadq_head = TAILQ_HEAD_INITIALIZER(deadq_head); 102 103 typedef struct deadq_entry { 104 pid_t dq_pid; 105 int dq_timeout; 106 TAILQ_ENTRY(deadq_entry) dq_entries; 107 } *dq_t; 108 109 /* 110 * The timeout to apply to processes waiting on the dead queue. Unit 111 * of measure is "mark intervals", i.e. 20 minutes by default. 112 * Processes on the dead queue will be terminated after that time. 113 */ 114 #define DQ_TIMO_INIT 2 115 116 /* 117 * Intervals at which we flush out "message repeated" messages, 118 * in seconds after previous message is logged. After each flush, 119 * we move to the next interval until we reach the largest. 120 */ 121 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ 122 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) 123 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) 124 #define BACKOFF(f) { if ((size_t)(++(f)->f_repeatcount) > MAXREPEAT) \ 125 (f)->f_repeatcount = MAXREPEAT; \ 126 } 127 128 /* values for f_type */ 129 #define F_UNUSED 0 /* unused entry */ 130 #define F_FILE 1 /* regular file */ 131 #define F_TTY 2 /* terminal */ 132 #define F_CONSOLE 3 /* console terminal */ 133 #define F_FORW 4 /* remote machine */ 134 #define F_USERS 5 /* list of users */ 135 #define F_WALL 6 /* everyone logged on */ 136 #define F_PIPE 7 /* pipe to program */ 137 #define F_FIFO 8 /* mkfifo(2) file */ 138 #define F_TLS 9 139 140 struct TypeInfo { 141 const char *name; 142 char *queue_length_string; 143 const char *default_length_string; 144 char *queue_size_string; 145 const char *default_size_string; 146 int64_t queue_length; 147 int64_t queue_size; 148 int max_msg_length; 149 } TypeInfo[] = { 150 /* numeric values are set in init() 151 * -1 in length/size or max_msg_length means infinite */ 152 {"UNUSED", NULL, "0", NULL, "0", 0, 0, 0}, 153 {"FILE", NULL, "1024", NULL, "1M", 0, 0, 16384}, 154 {"TTY", NULL, "0", NULL, "0", 0, 0, 1024}, 155 {"CONSOLE", NULL, "0", NULL, "0", 0, 0, 1024}, 156 {"FORW", NULL, "0", NULL, "1M", 0, 0, 16384}, 157 {"USERS", NULL, "0", NULL, "0", 0, 0, 1024}, 158 {"WALL", NULL, "0", NULL, "0", 0, 0, 1024}, 159 {"PIPE", NULL, "1024", NULL, "1M", 0, 0, 16384}, 160 {"FIFO", NULL, "1024", NULL, "1M", 0, 0, 16384}, 161 #ifndef DISABLE_TLS 162 {"TLS", NULL, "-1", NULL, "16M", 0, 0, 16384} 163 #endif /* !DISABLE_TLS */ 164 }; 165 166 struct filed *Files = NULL; 167 struct filed consfile; 168 169 time_t now; 170 int Debug = D_NONE; /* debug flag */ 171 int daemonized = 0; /* we are not daemonized yet */ 172 char *LocalFQDN = NULL; /* our FQDN */ 173 char *oldLocalFQDN = NULL; /* our previous FQDN */ 174 char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */ 175 struct socketEvent *finet; /* Internet datagram sockets and events */ 176 int *funix; /* Unix domain datagram sockets */ 177 #ifndef DISABLE_TLS 178 struct socketEvent *TLS_Listen_Set; /* TLS/TCP sockets and events */ 179 #endif /* !DISABLE_TLS */ 180 int Initialized = 0; /* set when we have initialized ourselves */ 181 int ShuttingDown; /* set when we die() */ 182 int MarkInterval = 20 * 60; /* interval between marks in seconds */ 183 int MarkSeq = 0; /* mark sequence number */ 184 int SecureMode = 0; /* listen only on unix domain socks */ 185 int UseNameService = 1; /* make domain name queries */ 186 int NumForwards = 0; /* number of forwarding actions in conf file */ 187 char **LogPaths; /* array of pathnames to read messages from */ 188 int NoRepeat = 0; /* disable "repeated"; log always */ 189 int RemoteAddDate = 0; /* always add date to messages from network */ 190 int SyncKernel = 0; /* write kernel messages synchronously */ 191 int UniquePriority = 0; /* only log specified priority */ 192 int LogFacPri = 0; /* put facility and priority in log messages: */ 193 /* 0=no, 1=numeric, 2=names */ 194 bool BSDOutputFormat = true; /* if true emit traditional BSD Syslog lines, 195 * otherwise new syslog-protocol lines 196 * 197 * Open Issue: having a global flag is the 198 * easiest solution. If we get a more detailed 199 * config file this could/should be changed 200 * into a destination-specific flag. 201 * Most output code should be ready to handle 202 * this, it will only break some syslog-sign 203 * configurations (e.g. with SG="0"). 204 */ 205 char appname[] = "syslogd";/* the APPNAME for own messages */ 206 char *include_pid = NULL; /* include PID in own messages */ 207 208 209 /* init and setup */ 210 void usage(void) __attribute__((__noreturn__)); 211 void logpath_add(char ***, int *, int *, const char *); 212 void logpath_fileadd(char ***, int *, int *, const char *); 213 void init(int fd, short event, void *ev); /* SIGHUP kevent dispatch routine */ 214 struct socketEvent* 215 socksetup(int, const char *); 216 int getmsgbufsize(void); 217 char *getLocalFQDN(void); 218 void trim_anydomain(char *); 219 /* pipe & subprocess handling */ 220 int p_open(char *, pid_t *); 221 void deadq_enter(pid_t, const char *); 222 int deadq_remove(pid_t); 223 void log_deadchild(pid_t, int, const char *); 224 void reapchild(int fd, short event, void *ev); /* SIGCHLD kevent dispatch routine */ 225 /* input message parsing & formatting */ 226 const char *cvthname(struct sockaddr_storage *); 227 void printsys(char *); 228 struct buf_msg *printline_syslogprotocol(const char*, char*, int, int); 229 struct buf_msg *printline_bsdsyslog(const char*, char*, int, int); 230 struct buf_msg *printline_kernelprintf(const char*, char*, int, int); 231 size_t check_timestamp(unsigned char *, char **, bool, bool); 232 char *copy_utf8_ascii(char*, size_t); 233 uint_fast32_t get_utf8_value(const char*); 234 unsigned valid_utf8(const char *); 235 static unsigned check_sd(char*); 236 static unsigned check_msgid(char *); 237 /* event handling */ 238 static void dispatch_read_klog(int fd, short event, void *ev); 239 static void dispatch_read_finet(int fd, short event, void *ev); 240 static void dispatch_read_funix(int fd, short event, void *ev); 241 static void domark(int fd, short event, void *ev); /* timer kevent dispatch routine */ 242 /* log messages */ 243 void logmsg_async(int, const char *, const char *, int); 244 void logmsg(struct buf_msg *); 245 int matches_spec(const char *, const char *, 246 char *(*)(const char *, const char *)); 247 void udp_send(struct filed *, char *, size_t); 248 void wallmsg(struct filed *, struct iovec *, size_t); 249 /* buffer & queue functions */ 250 size_t message_queue_purge(struct filed *f, size_t, int); 251 size_t message_allqueues_check(void); 252 static struct buf_queue * 253 find_qentry_to_delete(const struct buf_queue_head *, int, bool); 254 struct buf_queue * 255 message_queue_add(struct filed *, struct buf_msg *); 256 size_t buf_queue_obj_size(struct buf_queue*); 257 /* configuration & parsing */ 258 void cfline(size_t, const char *, struct filed *, const char *, 259 const char *); 260 void read_config_file(FILE*, struct filed**); 261 void store_sign_delim_sg2(char*); 262 int decode(const char *, CODE *); 263 bool copy_config_value(const char *, char **, const char **, 264 const char *, int); 265 bool copy_config_value_word(char **, const char **); 266 267 /* config parsing */ 268 #ifndef DISABLE_TLS 269 void free_cred_SLIST(struct peer_cred_head *); 270 static inline void 271 free_incoming_tls_sockets(void); 272 #endif /* !DISABLE_TLS */ 273 static int writev1(int, struct iovec *, size_t); 274 275 /* for make_timestamp() */ 276 #define TIMESTAMPBUFSIZE 35 277 char timestamp[TIMESTAMPBUFSIZE]; 278 279 /* 280 * Global line buffer. Since we only process one event at a time, 281 * a global one will do. But for klog, we use own buffer so that 282 * partial line at the end of buffer can be deferred. 283 */ 284 char *linebuf, *klog_linebuf; 285 size_t linebufsize, klog_linebufoff; 286 287 static const char *bindhostname = NULL; 288 289 #ifndef DISABLE_TLS 290 struct TLS_Incoming TLS_Incoming_Head = \ 291 SLIST_HEAD_INITIALIZER(TLS_Incoming_Head); 292 extern char *SSL_ERRCODE[]; 293 struct tls_global_options_t tls_opt; 294 #endif /* !DISABLE_TLS */ 295 296 int 297 main(int argc, char *argv[]) 298 { 299 int ch, j, fklog; 300 int funixsize = 0, funixmaxsize = 0; 301 struct sockaddr_un sunx; 302 char **pp; 303 struct event *ev; 304 uid_t uid = 0; 305 gid_t gid = 0; 306 char *user = NULL; 307 char *group = NULL; 308 const char *root = "/"; 309 char *endp; 310 struct group *gr; 311 struct passwd *pw; 312 unsigned long l; 313 314 /* should we set LC_TIME="C" to ensure correct timestamps&parsing? */ 315 (void)setlocale(LC_ALL, ""); 316 317 while ((ch = getopt(argc, argv, "b:dnsSf:m:o:p:P:ru:g:t:TUv")) != -1) 318 switch(ch) { 319 case 'b': 320 bindhostname = optarg; 321 break; 322 case 'd': /* debug */ 323 Debug = D_DEFAULT; 324 /* is there a way to read the integer value 325 * for Debug as an optional argument? */ 326 break; 327 case 'f': /* configuration file */ 328 ConfFile = optarg; 329 break; 330 case 'g': 331 group = optarg; 332 if (*group == '\0') 333 usage(); 334 break; 335 case 'm': /* mark interval */ 336 MarkInterval = atoi(optarg) * 60; 337 break; 338 case 'n': /* turn off DNS queries */ 339 UseNameService = 0; 340 break; 341 case 'o': /* message format */ 342 #define EQ(a) (strncmp(optarg, # a, sizeof(# a) - 1) == 0) 343 if (EQ(bsd) || EQ(rfc3264)) 344 BSDOutputFormat = true; 345 else if (EQ(syslog) || EQ(rfc5424)) 346 BSDOutputFormat = false; 347 else 348 usage(); 349 /* TODO: implement additional output option "osyslog" 350 * for old syslogd behaviour as introduced after 351 * FreeBSD PR#bin/7055. 352 */ 353 break; 354 case 'p': /* path */ 355 logpath_add(&LogPaths, &funixsize, 356 &funixmaxsize, optarg); 357 break; 358 case 'P': /* file of paths */ 359 logpath_fileadd(&LogPaths, &funixsize, 360 &funixmaxsize, optarg); 361 break; 362 case 'r': /* disable "repeated" compression */ 363 NoRepeat++; 364 break; 365 case 's': /* no network listen mode */ 366 SecureMode++; 367 break; 368 case 'S': 369 SyncKernel = 1; 370 break; 371 case 't': 372 root = optarg; 373 if (*root == '\0') 374 usage(); 375 break; 376 case 'T': 377 RemoteAddDate = 1; 378 break; 379 case 'u': 380 user = optarg; 381 if (*user == '\0') 382 usage(); 383 break; 384 case 'U': /* only log specified priority */ 385 UniquePriority = 1; 386 break; 387 case 'v': /* log facility and priority */ 388 if (LogFacPri < 2) 389 LogFacPri++; 390 break; 391 default: 392 usage(); 393 } 394 if ((argc -= optind) != 0) 395 usage(); 396 397 setlinebuf(stdout); 398 tzset(); /* init TZ information for localtime. */ 399 400 if (user != NULL) { 401 if (isdigit((unsigned char)*user)) { 402 errno = 0; 403 endp = NULL; 404 l = strtoul(user, &endp, 0); 405 if (errno || *endp != '\0') 406 goto getuser; 407 uid = (uid_t)l; 408 if (uid != l) {/* TODO: never executed */ 409 errno = 0; 410 logerror("UID out of range"); 411 die(0, 0, NULL); 412 } 413 } else { 414 getuser: 415 if ((pw = getpwnam(user)) != NULL) { 416 uid = pw->pw_uid; 417 } else { 418 errno = 0; 419 logerror("Cannot find user `%s'", user); 420 die(0, 0, NULL); 421 } 422 } 423 } 424 425 if (group != NULL) { 426 if (isdigit((unsigned char)*group)) { 427 errno = 0; 428 endp = NULL; 429 l = strtoul(group, &endp, 0); 430 if (errno || *endp != '\0') 431 goto getgroup; 432 gid = (gid_t)l; 433 if (gid != l) {/* TODO: never executed */ 434 errno = 0; 435 logerror("GID out of range"); 436 die(0, 0, NULL); 437 } 438 } else { 439 getgroup: 440 if ((gr = getgrnam(group)) != NULL) { 441 gid = gr->gr_gid; 442 } else { 443 errno = 0; 444 logerror("Cannot find group `%s'", group); 445 die(0, 0, NULL); 446 } 447 } 448 } 449 450 if (access(root, F_OK | R_OK)) { 451 logerror("Cannot access `%s'", root); 452 die(0, 0, NULL); 453 } 454 455 consfile.f_type = F_CONSOLE; 456 (void)strlcpy(consfile.f_un.f_fname, ctty, 457 sizeof(consfile.f_un.f_fname)); 458 linebufsize = getmsgbufsize(); 459 if (linebufsize < MAXLINE) 460 linebufsize = MAXLINE; 461 linebufsize++; 462 463 if (!(linebuf = malloc(linebufsize))) { 464 logerror("Couldn't allocate buffer"); 465 die(0, 0, NULL); 466 } 467 if (!(klog_linebuf = malloc(linebufsize))) { 468 logerror("Couldn't allocate buffer for klog"); 469 die(0, 0, NULL); 470 } 471 472 473 #ifndef SUN_LEN 474 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 475 #endif 476 if (funixsize == 0) 477 logpath_add(&LogPaths, &funixsize, 478 &funixmaxsize, _PATH_LOG); 479 funix = malloc(sizeof(*funix) * funixsize); 480 if (funix == NULL) { 481 logerror("Couldn't allocate funix descriptors"); 482 die(0, 0, NULL); 483 } 484 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 485 DPRINTF(D_NET, "Making unix dgram socket `%s'\n", *pp); 486 unlink(*pp); 487 memset(&sunx, 0, sizeof(sunx)); 488 sunx.sun_family = AF_LOCAL; 489 (void)strncpy(sunx.sun_path, *pp, sizeof(sunx.sun_path)); 490 funix[j] = socket(AF_LOCAL, SOCK_DGRAM, 0); 491 if (funix[j] < 0 || bind(funix[j], 492 (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 || 493 chmod(*pp, 0666) < 0) { 494 logerror("Cannot create `%s'", *pp); 495 die(0, 0, NULL); 496 } 497 DPRINTF(D_NET, "Listening on unix dgram socket `%s'\n", *pp); 498 } 499 500 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) < 0) { 501 DPRINTF(D_FILE, "Can't open `%s' (%d)\n", _PATH_KLOG, errno); 502 } else { 503 DPRINTF(D_FILE, "Listening on kernel log `%s' with fd %d\n", 504 _PATH_KLOG, fklog); 505 } 506 507 #if (!defined(DISABLE_TLS) && !defined(DISABLE_SIGN)) 508 /* basic OpenSSL init */ 509 SSL_load_error_strings(); 510 (void) SSL_library_init(); 511 OpenSSL_add_all_digests(); 512 /* OpenSSL PRNG needs /dev/urandom, thus initialize before chroot() */ 513 if (!RAND_status()) { 514 errno = 0; 515 logerror("Unable to initialize OpenSSL PRNG"); 516 } else { 517 DPRINTF(D_TLS, "Initializing PRNG\n"); 518 } 519 #endif /* (!defined(DISABLE_TLS) && !defined(DISABLE_SIGN)) */ 520 #ifndef DISABLE_SIGN 521 /* initialize rsid -- we will use that later to determine 522 * whether sign_global_init() was already called */ 523 GlobalSign.rsid = 0; 524 #endif /* !DISABLE_SIGN */ 525 #if (IETF_NUM_PRIVALUES != (LOG_NFACILITIES<<3)) 526 logerror("Warning: system defines %d priority values, but " 527 "syslog-protocol/syslog-sign specify %d values", 528 LOG_NFACILITIES, SIGN_NUM_PRIVALS); 529 #endif 530 531 /* 532 * All files are open, we can drop privileges and chroot 533 */ 534 DPRINTF(D_MISC, "Attempt to chroot to `%s'\n", root); 535 if (chroot(root) == -1) { 536 logerror("Failed to chroot to `%s'", root); 537 die(0, 0, NULL); 538 } 539 DPRINTF(D_MISC, "Attempt to set GID/EGID to `%d'\n", gid); 540 if (setgid(gid) || setegid(gid)) { 541 logerror("Failed to set gid to `%d'", gid); 542 die(0, 0, NULL); 543 } 544 DPRINTF(D_MISC, "Attempt to set UID/EUID to `%d'\n", uid); 545 if (setuid(uid) || seteuid(uid)) { 546 logerror("Failed to set uid to `%d'", uid); 547 die(0, 0, NULL); 548 } 549 /* 550 * We cannot detach from the terminal before we are sure we won't 551 * have a fatal error, because error message would not go to the 552 * terminal and would not be logged because syslogd dies. 553 * All die() calls are behind us, we can call daemon() 554 */ 555 if (!Debug) { 556 (void)daemon(0, 0); 557 daemonized = 1; 558 /* tuck my process id away, if i'm not in debug mode */ 559 #ifdef __NetBSD_Version__ 560 pidfile(NULL); 561 #endif /* __NetBSD_Version__ */ 562 } 563 564 #define MAX_PID_LEN 5 565 include_pid = malloc(MAX_PID_LEN+1); 566 snprintf(include_pid, MAX_PID_LEN+1, "%d", getpid()); 567 568 /* 569 * Create the global kernel event descriptor. 570 * 571 * NOTE: We MUST do this after daemon(), bacause the kqueue() 572 * API dictates that kqueue descriptors are not inherited 573 * across forks (lame!). 574 */ 575 (void)event_init(); 576 577 /* 578 * We must read the configuration file for the first time 579 * after the kqueue descriptor is created, because we install 580 * events during this process. 581 */ 582 init(0, 0, NULL); 583 584 /* 585 * Always exit on SIGTERM. Also exit on SIGINT and SIGQUIT 586 * if we're debugging. 587 */ 588 (void)signal(SIGTERM, SIG_IGN); 589 (void)signal(SIGINT, SIG_IGN); 590 (void)signal(SIGQUIT, SIG_IGN); 591 592 ev = allocev(); 593 signal_set(ev, SIGTERM, die, ev); 594 EVENT_ADD(ev); 595 596 if (Debug) { 597 ev = allocev(); 598 signal_set(ev, SIGINT, die, ev); 599 EVENT_ADD(ev); 600 ev = allocev(); 601 signal_set(ev, SIGQUIT, die, ev); 602 EVENT_ADD(ev); 603 } 604 605 ev = allocev(); 606 signal_set(ev, SIGCHLD, reapchild, ev); 607 EVENT_ADD(ev); 608 609 ev = allocev(); 610 schedule_event(&ev, 611 &((struct timeval){TIMERINTVL, 0}), 612 domark, ev); 613 614 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */ 615 616 /* Re-read configuration on SIGHUP. */ 617 (void) signal(SIGHUP, SIG_IGN); 618 ev = allocev(); 619 signal_set(ev, SIGHUP, init, ev); 620 EVENT_ADD(ev); 621 622 #ifndef DISABLE_TLS 623 ev = allocev(); 624 signal_set(ev, SIGUSR1, dispatch_force_tls_reconnect, ev); 625 EVENT_ADD(ev); 626 #endif /* !DISABLE_TLS */ 627 628 if (fklog >= 0) { 629 ev = allocev(); 630 DPRINTF(D_EVENT, 631 "register klog for fd %d with ev@%p\n", fklog, ev); 632 event_set(ev, fklog, EV_READ | EV_PERSIST, 633 dispatch_read_klog, ev); 634 EVENT_ADD(ev); 635 } 636 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 637 ev = allocev(); 638 event_set(ev, funix[j], EV_READ | EV_PERSIST, 639 dispatch_read_funix, ev); 640 EVENT_ADD(ev); 641 } 642 643 DPRINTF(D_MISC, "Off & running....\n"); 644 645 j = event_dispatch(); 646 /* normal termination via die(), reaching this is an error */ 647 DPRINTF(D_MISC, "event_dispatch() returned %d\n", j); 648 die(0, 0, NULL); 649 /*NOTREACHED*/ 650 return 0; 651 } 652 653 void 654 usage(void) 655 { 656 657 (void)fprintf(stderr, 658 "usage: %s [-dnrSsTUv] [-b bind_address] [-f config_file] [-g group]\n" 659 "\t[-m mark_interval] [-P file_list] [-p log_socket\n" 660 "\t[-p log_socket2 ...]] [-t chroot_dir] [-u user]\n", 661 getprogname()); 662 exit(1); 663 } 664 665 /* 666 * Dispatch routine for reading /dev/klog 667 * 668 * Note: slightly different semantic in dispatch_read functions: 669 * - read_klog() might give multiple messages in linebuf and 670 * leaves the task of splitting them to printsys() 671 * - all other read functions receive one message and 672 * then call printline() with one buffer. 673 */ 674 static void 675 dispatch_read_klog(int fd, short event, void *ev) 676 { 677 ssize_t rv; 678 size_t resid = linebufsize - klog_linebufoff; 679 680 DPRINTF((D_CALL|D_EVENT), "Kernel log active (%d, %d, %p)" 681 " with linebuf@%p, length %zu)\n", fd, event, ev, 682 klog_linebuf, linebufsize); 683 684 rv = read(fd, &klog_linebuf[klog_linebufoff], resid - 1); 685 if (rv > 0) { 686 klog_linebuf[klog_linebufoff + rv] = '\0'; 687 printsys(klog_linebuf); 688 } else if (rv < 0 && errno != EINTR) { 689 /* 690 * /dev/klog has croaked. Disable the event 691 * so it won't bother us again. 692 */ 693 logerror("klog failed"); 694 event_del(ev); 695 } 696 } 697 698 /* 699 * Dispatch routine for reading Unix domain sockets. 700 */ 701 static void 702 dispatch_read_funix(int fd, short event, void *ev) 703 { 704 struct sockaddr_un myname, fromunix; 705 ssize_t rv; 706 socklen_t sunlen; 707 708 sunlen = sizeof(myname); 709 if (getsockname(fd, (struct sockaddr *)&myname, &sunlen) != 0) { 710 /* 711 * This should never happen, so ensure that it doesn't 712 * happen again. 713 */ 714 logerror("getsockname() unix failed"); 715 event_del(ev); 716 return; 717 } 718 719 DPRINTF((D_CALL|D_EVENT|D_NET), "Unix socket (%.*s) active (%d, %d %p)" 720 " with linebuf@%p, size %zu)\n", (int)(myname.sun_len 721 - sizeof(myname.sun_len) - sizeof(myname.sun_family)), 722 myname.sun_path, fd, event, ev, linebuf, linebufsize-1); 723 724 sunlen = sizeof(fromunix); 725 rv = recvfrom(fd, linebuf, linebufsize-1, 0, 726 (struct sockaddr *)&fromunix, &sunlen); 727 if (rv > 0) { 728 linebuf[rv] = '\0'; 729 printline(LocalFQDN, linebuf, 0); 730 } else if (rv < 0 && errno != EINTR) { 731 logerror("recvfrom() unix `%.*s'", 732 myname.sun_len, myname.sun_path); 733 } 734 } 735 736 /* 737 * Dispatch routine for reading Internet sockets. 738 */ 739 static void 740 dispatch_read_finet(int fd, short event, void *ev) 741 { 742 #ifdef LIBWRAP 743 struct request_info req; 744 #endif 745 struct sockaddr_storage frominet; 746 ssize_t rv; 747 socklen_t len; 748 int reject = 0; 749 750 DPRINTF((D_CALL|D_EVENT|D_NET), "inet socket active (%d, %d %p) " 751 " with linebuf@%p, size %zu)\n", 752 fd, event, ev, linebuf, linebufsize-1); 753 754 #ifdef LIBWRAP 755 request_init(&req, RQ_DAEMON, appname, RQ_FILE, fd, NULL); 756 fromhost(&req); 757 reject = !hosts_access(&req); 758 if (reject) 759 DPRINTF(D_NET, "access denied\n"); 760 #endif 761 762 len = sizeof(frominet); 763 rv = recvfrom(fd, linebuf, linebufsize-1, 0, 764 (struct sockaddr *)&frominet, &len); 765 if (rv == 0 || (rv < 0 && errno == EINTR)) 766 return; 767 else if (rv < 0) { 768 logerror("recvfrom inet"); 769 return; 770 } 771 772 linebuf[rv] = '\0'; 773 if (!reject) 774 printline(cvthname(&frominet), linebuf, 775 RemoteAddDate ? ADDDATE : 0); 776 } 777 778 /* 779 * given a pointer to an array of char *'s, a pointer to its current 780 * size and current allocated max size, and a new char * to add, add 781 * it, update everything as necessary, possibly allocating a new array 782 */ 783 void 784 logpath_add(char ***lp, int *szp, int *maxszp, const char *new) 785 { 786 char **nlp; 787 int newmaxsz; 788 789 DPRINTF(D_FILE, "Adding `%s' to the %p logpath list\n", new, *lp); 790 if (*szp == *maxszp) { 791 if (*maxszp == 0) { 792 newmaxsz = 4; /* start of with enough for now */ 793 *lp = NULL; 794 } else 795 newmaxsz = *maxszp * 2; 796 nlp = realloc(*lp, sizeof(char *) * (newmaxsz + 1)); 797 if (nlp == NULL) { 798 logerror("Couldn't allocate line buffer"); 799 die(0, 0, NULL); 800 } 801 *lp = nlp; 802 *maxszp = newmaxsz; 803 } 804 if (((*lp)[(*szp)++] = strdup(new)) == NULL) { 805 logerror("Couldn't allocate logpath"); 806 die(0, 0, NULL); 807 } 808 (*lp)[(*szp)] = NULL; /* always keep it NULL terminated */ 809 } 810 811 /* do a file of log sockets */ 812 void 813 logpath_fileadd(char ***lp, int *szp, int *maxszp, const char *file) 814 { 815 FILE *fp; 816 char *line; 817 size_t len; 818 819 fp = fopen(file, "r"); 820 if (fp == NULL) { 821 logerror("Could not open socket file list `%s'", file); 822 die(0, 0, NULL); 823 } 824 825 while ((line = fgetln(fp, &len)) != NULL) { 826 line[len - 1] = 0; 827 logpath_add(lp, szp, maxszp, line); 828 } 829 fclose(fp); 830 } 831 832 /* 833 * checks UTF-8 codepoint 834 * returns either its length in bytes or 0 if *input is invalid 835 */ 836 unsigned 837 valid_utf8(const char *c) { 838 unsigned rc, nb; 839 840 /* first byte gives sequence length */ 841 if ((*c & 0x80) == 0x00) return 1; /* 0bbbbbbb -- ASCII */ 842 else if ((*c & 0xc0) == 0x80) return 0; /* 10bbbbbb -- trailing byte */ 843 else if ((*c & 0xe0) == 0xc0) nb = 2; /* 110bbbbb */ 844 else if ((*c & 0xf0) == 0xe0) nb = 3; /* 1110bbbb */ 845 else if ((*c & 0xf8) == 0xf0) nb = 4; /* 11110bbb */ 846 else return 0; /* UTF-8 allows only up to 4 bytes */ 847 848 /* catch overlong encodings */ 849 if ((*c & 0xfe) == 0xc0) 850 return 0; /* 1100000b ... */ 851 else if (((*c & 0xff) == 0xe0) && ((*(c+1) & 0xe0) == 0x80)) 852 return 0; /* 11100000 100bbbbb ... */ 853 else if (((*c & 0xff) == 0xf0) && ((*(c+1) & 0xf0) == 0x80)) 854 return 0; /* 11110000 1000bbbb ... ... */ 855 856 /* and also filter UTF-16 surrogates (=invalid in UTF-8) */ 857 if (((*c & 0xff) == 0xed) && ((*(c+1) & 0xe0) == 0xa0)) 858 return 0; /* 11101101 101bbbbb ... */ 859 860 rc = nb; 861 /* check trailing bytes */ 862 switch (nb) { 863 default: return 0; 864 case 4: if ((*(c+3) & 0xc0) != 0x80) return 0; /*FALLTHROUGH*/ 865 case 3: if ((*(c+2) & 0xc0) != 0x80) return 0; /*FALLTHROUGH*/ 866 case 2: if ((*(c+1) & 0xc0) != 0x80) return 0; /*FALLTHROUGH*/ 867 } 868 return rc; 869 } 870 #define UTF8CHARMAX 4 871 872 /* 873 * read UTF-8 value 874 * returns a the codepoint number 875 */ 876 uint_fast32_t 877 get_utf8_value(const char *c) { 878 uint_fast32_t sum; 879 unsigned nb, i; 880 881 /* first byte gives sequence length */ 882 if ((*c & 0x80) == 0x00) return *c;/* 0bbbbbbb -- ASCII */ 883 else if ((*c & 0xc0) == 0x80) return 0; /* 10bbbbbb -- trailing byte */ 884 else if ((*c & 0xe0) == 0xc0) { /* 110bbbbb */ 885 nb = 2; 886 sum = (*c & ~0xe0) & 0xff; 887 } else if ((*c & 0xf0) == 0xe0) { /* 1110bbbb */ 888 nb = 3; 889 sum = (*c & ~0xf0) & 0xff; 890 } else if ((*c & 0xf8) == 0xf0) { /* 11110bbb */ 891 nb = 4; 892 sum = (*c & ~0xf8) & 0xff; 893 } else return 0; /* UTF-8 allows only up to 4 bytes */ 894 895 /* check trailing bytes -- 10bbbbbb */ 896 i = 1; 897 while (i < nb) { 898 sum <<= 6; 899 sum |= ((*(c+i) & ~0xc0) & 0xff); 900 i++; 901 } 902 return sum; 903 } 904 905 /* note previous versions transscribe 906 * control characters, e.g. \007 --> "^G" 907 * did anyone rely on that? 908 * 909 * this new version works on only one buffer and 910 * replaces control characters with a space 911 */ 912 #define NEXTFIELD(ptr) if (*(p) == ' ') (p)++; /* SP */ \ 913 else { \ 914 DPRINTF(D_DATA, "format error\n"); \ 915 if (*(p) == '\0') start = (p); \ 916 goto all_syslog_msg; \ 917 } 918 #define FORCE2ASCII(c) ((iscntrl((unsigned char)(c)) && (c) != '\t') \ 919 ? ((c) == '\n' ? ' ' : '?') \ 920 : (c) & 0177) 921 922 /* following syslog-protocol */ 923 #define printusascii(ch) (ch >= 33 && ch <= 126) 924 #define sdname(ch) (ch != '=' && ch != ' ' \ 925 && ch != ']' && ch != '"' \ 926 && printusascii(ch)) 927 928 /* checks whether the first word of string p can be interpreted as 929 * a syslog-protocol MSGID and if so returns its length. 930 * 931 * otherwise returns 0 932 */ 933 static unsigned 934 check_msgid(char *p) 935 { 936 char *q = p; 937 938 /* consider the NILVALUE to be valid */ 939 if (*q == '-' && *(q+1) == ' ') 940 return 1; 941 942 for (;;) { 943 if (*q == ' ') 944 return q - p; 945 else if (*q == '\0' || !printusascii(*q) || q - p >= MSGID_MAX) 946 return 0; 947 else 948 q++; 949 } 950 } 951 952 /* 953 * returns number of chars found in SD at beginning of string p 954 * thus returns 0 if no valid SD is found 955 * 956 * if ascii == true then substitute all non-ASCII chars 957 * otherwise use syslog-protocol rules to allow UTF-8 in values 958 * note: one pass for filtering and scanning, so a found SD 959 * is always filtered, but an invalid one could be partially 960 * filtered up to the format error. 961 */ 962 static unsigned 963 check_sd(char* p) 964 { 965 char *q = p; 966 bool esc = false; 967 968 /* consider the NILVALUE to be valid */ 969 if (*q == '-' && (*(q+1) == ' ' || *(q+1) == '\0')) 970 return 1; 971 972 for(;;) { /* SD-ELEMENT */ 973 if (*q++ != '[') return 0; 974 /* SD-ID */ 975 if (!sdname(*q)) return 0; 976 while (sdname(*q)) { 977 *q = FORCE2ASCII(*q); 978 q++; 979 } 980 for(;;) { /* SD-PARAM */ 981 if (*q == ']') { 982 q++; 983 if (*q == ' ' || *q == '\0') return q - p; 984 else if (*q == '[') break; 985 } else if (*q++ != ' ') return 0; 986 987 /* PARAM-NAME */ 988 if (!sdname(*q)) return 0; 989 while (sdname(*q)) { 990 *q = FORCE2ASCII(*q); 991 q++; 992 } 993 994 if (*q++ != '=') return 0; 995 if (*q++ != '"') return 0; 996 997 for(;;) { /* PARAM-VALUE */ 998 if (esc) { 999 esc = false; 1000 if (*q == '\\' || *q == '"' || 1001 *q == ']') { 1002 q++; 1003 continue; 1004 } 1005 /* no else because invalid 1006 * escape sequences are accepted */ 1007 } 1008 else if (*q == '"') break; 1009 else if (*q == '\0' || *q == ']') return 0; 1010 else if (*q == '\\') esc = true; 1011 else { 1012 int i; 1013 i = valid_utf8(q); 1014 if (i == 0) 1015 *q = '?'; 1016 else if (i == 1) 1017 *q = FORCE2ASCII(*q); 1018 else /* multi byte char */ 1019 q += (i-1); 1020 } 1021 q++; 1022 } 1023 q++; 1024 } 1025 } 1026 } 1027 1028 struct buf_msg * 1029 printline_syslogprotocol(const char *hname, char *msg, 1030 int flags, int pri) 1031 { 1032 struct buf_msg *buffer; 1033 char *p, *start; 1034 unsigned sdlen = 0, i = 0; 1035 bool utf8allowed = false; /* for some fields */ 1036 1037 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_syslogprotocol(" 1038 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1039 1040 buffer = buf_msg_new(0); 1041 p = msg; 1042 p += check_timestamp((unsigned char*) p, 1043 &buffer->timestamp, true, !BSDOutputFormat); 1044 DPRINTF(D_DATA, "Got timestamp \"%s\"\n", buffer->timestamp); 1045 1046 if (flags & ADDDATE) { 1047 FREEPTR(buffer->timestamp); 1048 buffer->timestamp = strdup(make_timestamp(NULL, 1049 !BSDOutputFormat)); 1050 } 1051 1052 start = p; 1053 NEXTFIELD(p); 1054 /* extract host */ 1055 for (start = p;; p++) { 1056 if ((*p == ' ' || *p == '\0') 1057 && start == p-1 && *(p-1) == '-') { 1058 /* NILVALUE */ 1059 break; 1060 } else if ((*p == ' ' || *p == '\0') 1061 && (start != p-1 || *(p-1) != '-')) { 1062 buffer->host = strndup(start, p - start); 1063 break; 1064 } else { 1065 *p = FORCE2ASCII(*p); 1066 } 1067 } 1068 /* p @ SP after host */ 1069 DPRINTF(D_DATA, "Got host \"%s\"\n", buffer->host); 1070 1071 /* extract app-name */ 1072 NEXTFIELD(p); 1073 for (start = p;; p++) { 1074 if ((*p == ' ' || *p == '\0') 1075 && start == p-1 && *(p-1) == '-') { 1076 /* NILVALUE */ 1077 break; 1078 } else if ((*p == ' ' || *p == '\0') 1079 && (start != p-1 || *(p-1) != '-')) { 1080 buffer->prog = strndup(start, p - start); 1081 break; 1082 } else { 1083 *p = FORCE2ASCII(*p); 1084 } 1085 } 1086 DPRINTF(D_DATA, "Got prog \"%s\"\n", buffer->prog); 1087 1088 /* extract procid */ 1089 NEXTFIELD(p); 1090 for (start = p;; p++) { 1091 if ((*p == ' ' || *p == '\0') 1092 && start == p-1 && *(p-1) == '-') { 1093 /* NILVALUE */ 1094 break; 1095 } else if ((*p == ' ' || *p == '\0') 1096 && (start != p-1 || *(p-1) != '-')) { 1097 buffer->pid = strndup(start, p - start); 1098 start = p; 1099 break; 1100 } else { 1101 *p = FORCE2ASCII(*p); 1102 } 1103 } 1104 DPRINTF(D_DATA, "Got pid \"%s\"\n", buffer->pid); 1105 1106 /* extract msgid */ 1107 NEXTFIELD(p); 1108 for (start = p;; p++) { 1109 if ((*p == ' ' || *p == '\0') 1110 && start == p-1 && *(p-1) == '-') { 1111 /* NILVALUE */ 1112 start = p+1; 1113 break; 1114 } else if ((*p == ' ' || *p == '\0') 1115 && (start != p-1 || *(p-1) != '-')) { 1116 buffer->msgid = strndup(start, p - start); 1117 start = p+1; 1118 break; 1119 } else { 1120 *p = FORCE2ASCII(*p); 1121 } 1122 } 1123 DPRINTF(D_DATA, "Got msgid \"%s\"\n", buffer->msgid); 1124 1125 /* extract SD */ 1126 NEXTFIELD(p); 1127 start = p; 1128 sdlen = check_sd(p); 1129 DPRINTF(D_DATA, "check_sd(\"%s\") returned %d\n", p, sdlen); 1130 1131 if (sdlen == 1 && *p == '-') { 1132 /* NILVALUE */ 1133 p++; 1134 } else if (sdlen > 1) { 1135 buffer->sd = strndup(p, sdlen); 1136 p += sdlen; 1137 } else { 1138 DPRINTF(D_DATA, "format error\n"); 1139 } 1140 if (*p == '\0') start = p; 1141 else if (*p == ' ') start = ++p; /* SP */ 1142 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1143 1144 /* and now the message itself 1145 * note: move back to last start to check for BOM 1146 */ 1147 all_syslog_msg: 1148 p = start; 1149 1150 /* check for UTF-8-BOM */ 1151 if (IS_BOM(p)) { 1152 DPRINTF(D_DATA, "UTF-8 BOM\n"); 1153 utf8allowed = true; 1154 p += 3; 1155 } 1156 1157 if (*p != '\0' && !utf8allowed) { 1158 size_t msglen; 1159 1160 msglen = strlen(p); 1161 assert(!buffer->msg); 1162 buffer->msg = copy_utf8_ascii(p, msglen); 1163 buffer->msgorig = buffer->msg; 1164 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1165 } else if (*p != '\0' && utf8allowed) { 1166 while (*p != '\0') { 1167 i = valid_utf8(p); 1168 if (i == 0) 1169 *p++ = '?'; 1170 else if (i == 1) 1171 *p = FORCE2ASCII(*p); 1172 p += i; 1173 } 1174 assert(p != start); 1175 assert(!buffer->msg); 1176 buffer->msg = strndup(start, p - start); 1177 buffer->msgorig = buffer->msg; 1178 buffer->msglen = buffer->msgsize = 1 + p - start; 1179 } 1180 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1181 1182 buffer->recvhost = strdup(hname); 1183 buffer->pri = pri; 1184 buffer->flags = flags; 1185 1186 return buffer; 1187 } 1188 1189 /* copies an input into a new ASCII buffer 1190 * ASCII controls are converted to format "^X" 1191 * multi-byte UTF-8 chars are converted to format "<ab><cd>" 1192 */ 1193 #define INIT_BUFSIZE 512 1194 char * 1195 copy_utf8_ascii(char *p, size_t p_len) 1196 { 1197 size_t idst = 0, isrc = 0, dstsize = INIT_BUFSIZE, i; 1198 char *dst, *tmp_dst; 1199 1200 MALLOC(dst, dstsize); 1201 while (isrc < p_len) { 1202 if (dstsize < idst + 10) { 1203 /* check for enough space for \0 and a UTF-8 1204 * conversion; longest possible is <U+123456> */ 1205 tmp_dst = realloc(dst, dstsize + INIT_BUFSIZE); 1206 if (!tmp_dst) 1207 break; 1208 dst = tmp_dst; 1209 dstsize += INIT_BUFSIZE; 1210 } 1211 1212 i = valid_utf8(&p[isrc]); 1213 if (i == 0) { /* invalid encoding */ 1214 dst[idst++] = '?'; 1215 isrc++; 1216 } else if (i == 1) { /* check printable */ 1217 if (iscntrl((unsigned char)p[isrc]) 1218 && p[isrc] != '\t') { 1219 if (p[isrc] == '\n') { 1220 dst[idst++] = ' '; 1221 isrc++; 1222 } else { 1223 dst[idst++] = '^'; 1224 dst[idst++] = p[isrc++] ^ 0100; 1225 } 1226 } else 1227 dst[idst++] = p[isrc++]; 1228 } else { /* convert UTF-8 to ASCII */ 1229 dst[idst++] = '<'; 1230 idst += snprintf(&dst[idst], dstsize - idst, "U+%x", 1231 get_utf8_value(&p[isrc])); 1232 isrc += i; 1233 dst[idst++] = '>'; 1234 } 1235 } 1236 dst[idst] = '\0'; 1237 1238 /* shrink buffer to right size */ 1239 tmp_dst = realloc(dst, idst+1); 1240 if (tmp_dst) 1241 return tmp_dst; 1242 else 1243 return dst; 1244 } 1245 1246 struct buf_msg * 1247 printline_bsdsyslog(const char *hname, char *msg, 1248 int flags, int pri) 1249 { 1250 struct buf_msg *buffer; 1251 char *p, *start; 1252 unsigned msgidlen = 0, sdlen = 0; 1253 1254 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_bsdsyslog(" 1255 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1256 1257 buffer = buf_msg_new(0); 1258 p = msg; 1259 p += check_timestamp((unsigned char*) p, 1260 &buffer->timestamp, false, !BSDOutputFormat); 1261 DPRINTF(D_DATA, "Got timestamp \"%s\"\n", buffer->timestamp); 1262 1263 if (flags & ADDDATE || !buffer->timestamp) { 1264 FREEPTR(buffer->timestamp); 1265 buffer->timestamp = strdup(make_timestamp(NULL, 1266 !BSDOutputFormat)); 1267 } 1268 1269 if (*p == ' ') p++; /* SP */ 1270 else goto all_bsd_msg; 1271 /* in any error case we skip header parsing and 1272 * treat all following data as message content */ 1273 1274 /* extract host */ 1275 for (start = p;; p++) { 1276 if (*p == ' ' || *p == '\0') { 1277 buffer->host = strndup(start, p - start); 1278 break; 1279 } else if (*p == '[' || (*p == ':' 1280 && (*(p+1) == ' ' || *(p+1) == '\0'))) { 1281 /* no host in message */ 1282 buffer->host = LocalFQDN; 1283 buffer->prog = strndup(start, p - start); 1284 break; 1285 } else { 1286 *p = FORCE2ASCII(*p); 1287 } 1288 } 1289 DPRINTF(D_DATA, "Got host \"%s\"\n", buffer->host); 1290 /* p @ SP after host, or @ :/[ after prog */ 1291 1292 /* extract program */ 1293 if (!buffer->prog) { 1294 if (*p == ' ') p++; /* SP */ 1295 else goto all_bsd_msg; 1296 1297 for (start = p;; p++) { 1298 if (*p == ' ' || *p == '\0') { /* error */ 1299 goto all_bsd_msg; 1300 } else if (*p == '[' || (*p == ':' 1301 && (*(p+1) == ' ' || *(p+1) == '\0'))) { 1302 buffer->prog = strndup(start, p - start); 1303 break; 1304 } else { 1305 *p = FORCE2ASCII(*p); 1306 } 1307 } 1308 } 1309 DPRINTF(D_DATA, "Got prog \"%s\"\n", buffer->prog); 1310 start = p; 1311 1312 /* p @ :/[ after prog */ 1313 if (*p == '[') { 1314 p++; 1315 if (*p == ' ') p++; /* SP */ 1316 for (start = p;; p++) { 1317 if (*p == ' ' || *p == '\0') { /* error */ 1318 goto all_bsd_msg; 1319 } else if (*p == ']') { 1320 buffer->pid = strndup(start, p - start); 1321 break; 1322 } else { 1323 *p = FORCE2ASCII(*p); 1324 } 1325 } 1326 } 1327 DPRINTF(D_DATA, "Got pid \"%s\"\n", buffer->pid); 1328 1329 if (*p == ']') p++; 1330 if (*p == ':') p++; 1331 if (*p == ' ') p++; 1332 1333 /* p @ msgid, @ opening [ of SD or @ first byte of message 1334 * accept either case and try to detect MSGID and SD fields 1335 * 1336 * only limitation: we do not accept UTF-8 data in 1337 * BSD Syslog messages -- so all SD values are ASCII-filtered 1338 * 1339 * I have found one scenario with 'unexpected' behaviour: 1340 * if there is only a SD intended, but a) it is short enough 1341 * to be a MSGID and b) the first word of the message can also 1342 * be parsed as an SD. 1343 * example: 1344 * "<35>Jul 6 12:39:08 tag[123]: [exampleSDID@0] - hello" 1345 * --> parsed as 1346 * MSGID = "[exampleSDID@0]" 1347 * SD = "-" 1348 * MSG = "hello" 1349 */ 1350 start = p; 1351 msgidlen = check_msgid(p); 1352 if (msgidlen) /* check for SD in 2nd field */ 1353 sdlen = check_sd(p+msgidlen+1); 1354 1355 if (msgidlen && sdlen) { 1356 /* MSGID in 1st and SD in 2nd field 1357 * now check for NILVALUEs and copy */ 1358 if (msgidlen == 1 && *p == '-') { 1359 p++; /* - */ 1360 p++; /* SP */ 1361 DPRINTF(D_DATA, "Got MSGID \"-\"\n"); 1362 } else { 1363 /* only has ASCII chars after check_msgid() */ 1364 buffer->msgid = strndup(p, msgidlen); 1365 p += msgidlen; 1366 p++; /* SP */ 1367 DPRINTF(D_DATA, "Got MSGID \"%s\"\n", 1368 buffer->msgid); 1369 } 1370 } else { 1371 /* either no msgid or no SD in 2nd field 1372 * --> check 1st field for SD */ 1373 DPRINTF(D_DATA, "No MSGID\n"); 1374 sdlen = check_sd(p); 1375 } 1376 1377 if (sdlen == 0) { 1378 DPRINTF(D_DATA, "No SD\n"); 1379 } else if (sdlen > 1) { 1380 buffer->sd = copy_utf8_ascii(p, sdlen); 1381 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1382 } else if (sdlen == 1 && *p == '-') { 1383 p++; 1384 DPRINTF(D_DATA, "Got SD \"-\"\n"); 1385 } else { 1386 DPRINTF(D_DATA, "Error\n"); 1387 } 1388 1389 if (*p == ' ') p++; 1390 start = p; 1391 /* and now the message itself 1392 * note: do not reset start, because we might come here 1393 * by goto and want to have the incomplete field as part 1394 * of the msg 1395 */ 1396 all_bsd_msg: 1397 if (*p != '\0') { 1398 size_t msglen = strlen(p); 1399 buffer->msg = copy_utf8_ascii(p, msglen); 1400 buffer->msgorig = buffer->msg; 1401 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1402 } 1403 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1404 1405 buffer->recvhost = strdup(hname); 1406 buffer->pri = pri; 1407 buffer->flags = flags | BSDSYSLOG; 1408 1409 return buffer; 1410 } 1411 1412 struct buf_msg * 1413 printline_kernelprintf(const char *hname, char *msg, 1414 int flags, int pri) 1415 { 1416 struct buf_msg *buffer; 1417 char *p; 1418 unsigned sdlen = 0; 1419 1420 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_kernelprintf(" 1421 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1422 1423 buffer = buf_msg_new(0); 1424 buffer->timestamp = strdup(make_timestamp(NULL, !BSDOutputFormat)); 1425 buffer->pri = pri; 1426 buffer->flags = flags; 1427 1428 /* assume there is no MSGID but there might be SD */ 1429 p = msg; 1430 sdlen = check_sd(p); 1431 1432 if (sdlen == 0) { 1433 DPRINTF(D_DATA, "No SD\n"); 1434 } else if (sdlen > 1) { 1435 buffer->sd = copy_utf8_ascii(p, sdlen); 1436 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1437 } else if (sdlen == 1 && *p == '-') { 1438 p++; 1439 DPRINTF(D_DATA, "Got SD \"-\"\n"); 1440 } else { 1441 DPRINTF(D_DATA, "Error\n"); 1442 } 1443 1444 if (*p == ' ') p++; 1445 if (*p != '\0') { 1446 size_t msglen = strlen(p); 1447 buffer->msg = copy_utf8_ascii(p, msglen); 1448 buffer->msgorig = buffer->msg; 1449 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1450 } 1451 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1452 1453 return buffer; 1454 } 1455 1456 /* 1457 * Take a raw input line, read priority and version, call the 1458 * right message parsing function, then call logmsg(). 1459 */ 1460 void 1461 printline(const char *hname, char *msg, int flags) 1462 { 1463 struct buf_msg *buffer; 1464 int pri; 1465 char *p, *q; 1466 long n; 1467 bool bsdsyslog = true; 1468 1469 DPRINTF((D_CALL|D_BUFFER|D_DATA), 1470 "printline(\"%s\", \"%s\", %d)\n", hname, msg, flags); 1471 1472 /* test for special codes */ 1473 pri = DEFUPRI; 1474 p = msg; 1475 if (*p == '<') { 1476 errno = 0; 1477 n = strtol(p + 1, &q, 10); 1478 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { 1479 p = q + 1; 1480 pri = (int)n; 1481 /* check for syslog-protocol version */ 1482 if (*p == '1' && p[1] == ' ') { 1483 p += 2; /* skip version and space */ 1484 bsdsyslog = false; 1485 } else { 1486 bsdsyslog = true; 1487 } 1488 } 1489 } 1490 if (pri & ~(LOG_FACMASK|LOG_PRIMASK)) 1491 pri = DEFUPRI; 1492 1493 /* 1494 * Don't allow users to log kernel messages. 1495 * NOTE: Since LOG_KERN == 0, this will also match 1496 * messages with no facility specified. 1497 */ 1498 if ((pri & LOG_FACMASK) == LOG_KERN) 1499 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); 1500 1501 if (bsdsyslog) { 1502 buffer = printline_bsdsyslog(hname, p, flags, pri); 1503 } else { 1504 buffer = printline_syslogprotocol(hname, p, flags, pri); 1505 } 1506 logmsg(buffer); 1507 DELREF(buffer); 1508 } 1509 1510 /* 1511 * Take a raw input line from /dev/klog, split and format similar to syslog(). 1512 */ 1513 void 1514 printsys(char *msg) 1515 { 1516 int n, is_printf, pri, flags; 1517 char *p, *q; 1518 struct buf_msg *buffer; 1519 1520 klog_linebufoff = 0; 1521 for (p = msg; *p != '\0'; ) { 1522 bool bsdsyslog = true; 1523 1524 is_printf = 1; 1525 flags = ISKERNEL | ADDDATE | BSDSYSLOG; 1526 if (SyncKernel) 1527 flags |= SYNC_FILE; 1528 if (is_printf) /* kernel printf's come out on console */ 1529 flags |= IGN_CONS; 1530 pri = DEFSPRI; 1531 1532 if (*p == '<') { 1533 errno = 0; 1534 n = (int)strtol(p + 1, &q, 10); 1535 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { 1536 p = q + 1; 1537 is_printf = 0; 1538 pri = n; 1539 if (*p == '1') { /* syslog-protocol version */ 1540 p += 2; /* skip version and space */ 1541 bsdsyslog = false; 1542 } else { 1543 bsdsyslog = true; 1544 } 1545 } 1546 } 1547 for (q = p; *q != '\0' && *q != '\n'; q++) 1548 /* look for end of line; no further checks. 1549 * trust the kernel to send ASCII only */; 1550 if (*q != '\0') 1551 *q++ = '\0'; 1552 else { 1553 memcpy(linebuf, p, klog_linebufoff = q - p); 1554 break; 1555 } 1556 1557 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 1558 pri = DEFSPRI; 1559 1560 /* allow all kinds of input from kernel */ 1561 if (is_printf) 1562 buffer = printline_kernelprintf( 1563 LocalFQDN, p, flags, pri); 1564 else { 1565 if (bsdsyslog) 1566 buffer = printline_bsdsyslog( 1567 LocalFQDN, p, flags, pri); 1568 else 1569 buffer = printline_syslogprotocol( 1570 LocalFQDN, p, flags, pri); 1571 } 1572 1573 /* set fields left open */ 1574 if (!buffer->prog) 1575 buffer->prog = strdup(_PATH_UNIX); 1576 if (!buffer->host) 1577 buffer->host = LocalFQDN; 1578 if (!buffer->recvhost) 1579 buffer->recvhost = LocalFQDN; 1580 1581 logmsg(buffer); 1582 DELREF(buffer); 1583 p = q; 1584 } 1585 } 1586 1587 /* 1588 * Check to see if `name' matches the provided specification, using the 1589 * specified strstr function. 1590 */ 1591 int 1592 matches_spec(const char *name, const char *spec, 1593 char *(*check)(const char *, const char *)) 1594 { 1595 const char *s; 1596 const char *cursor; 1597 char prev, next; 1598 size_t len; 1599 1600 if (name[0] == '\0') 1601 return 0; 1602 1603 if (strchr(name, ',')) /* sanity */ 1604 return 0; 1605 1606 len = strlen(name); 1607 cursor = spec; 1608 while ((s = (*check)(cursor, name)) != NULL) { 1609 prev = s == spec ? ',' : *(s - 1); 1610 cursor = s + len; 1611 next = *cursor; 1612 1613 if (prev == ',' && (next == '\0' || next == ',')) 1614 return 1; 1615 } 1616 1617 return 0; 1618 } 1619 1620 /* 1621 * wrapper with old function signature, 1622 * keeps calling code shorter and hides buffer allocation 1623 */ 1624 void 1625 logmsg_async(int pri, const char *sd, const char *msg, int flags) 1626 { 1627 struct buf_msg *buffer; 1628 size_t msglen; 1629 1630 DPRINTF((D_CALL|D_DATA), "logmsg_async(%d, \"%s\", \"%s\", %d)\n", 1631 pri, sd, msg, flags); 1632 1633 if (msg) { 1634 msglen = strlen(msg); 1635 msglen++; /* adds \0 */ 1636 buffer = buf_msg_new(msglen); 1637 buffer->msglen = strlcpy(buffer->msg, msg, msglen) + 1; 1638 } else { 1639 buffer = buf_msg_new(0); 1640 } 1641 if (sd) buffer->sd = strdup(sd); 1642 buffer->timestamp = strdup(make_timestamp(NULL, !BSDOutputFormat)); 1643 buffer->prog = appname; 1644 buffer->pid = include_pid; 1645 buffer->recvhost = buffer->host = LocalFQDN; 1646 buffer->pri = pri; 1647 buffer->flags = flags; 1648 1649 logmsg(buffer); 1650 DELREF(buffer); 1651 } 1652 1653 /* read timestamp in from_buf, convert into a timestamp in to_buf 1654 * 1655 * returns length of timestamp found in from_buf (= number of bytes consumed) 1656 */ 1657 size_t 1658 check_timestamp(unsigned char *from_buf, char **to_buf, 1659 bool from_iso, bool to_iso) 1660 { 1661 unsigned char *q; 1662 int p; 1663 bool found_ts = false; 1664 1665 DPRINTF((D_CALL|D_DATA), "check_timestamp(%p = \"%s\", from_iso=%d, " 1666 "to_iso=%d)\n", from_buf, from_buf, from_iso, to_iso); 1667 1668 if (!from_buf) return 0; 1669 /* 1670 * Check to see if msg looks non-standard. 1671 * looks at every char because we do not have a msg length yet 1672 */ 1673 /* detailed checking adapted from Albert Mietus' sl_timestamp.c */ 1674 if (from_iso) { 1675 if (from_buf[4] == '-' && from_buf[7] == '-' 1676 && from_buf[10] == 'T' && from_buf[13] == ':' 1677 && from_buf[16] == ':' 1678 && isdigit(from_buf[0]) && isdigit(from_buf[1]) 1679 && isdigit(from_buf[2]) && isdigit(from_buf[3]) /* YYYY */ 1680 && isdigit(from_buf[5]) && isdigit(from_buf[6]) 1681 && isdigit(from_buf[8]) && isdigit(from_buf[9]) /* mm dd */ 1682 && isdigit(from_buf[11]) && isdigit(from_buf[12]) /* HH */ 1683 && isdigit(from_buf[14]) && isdigit(from_buf[15]) /* MM */ 1684 && isdigit(from_buf[17]) && isdigit(from_buf[18]) /* SS */ 1685 ) { 1686 /* time-secfrac */ 1687 if (from_buf[19] == '.') 1688 for (p=20; isdigit(from_buf[p]); p++) /* NOP*/; 1689 else 1690 p = 19; 1691 /* time-offset */ 1692 if (from_buf[p] == 'Z' 1693 || ((from_buf[p] == '+' || from_buf[p] == '-') 1694 && from_buf[p+3] == ':' 1695 && isdigit(from_buf[p+1]) && isdigit(from_buf[p+2]) 1696 && isdigit(from_buf[p+4]) && isdigit(from_buf[p+5]) 1697 )) 1698 found_ts = true; 1699 } 1700 } else { 1701 if (from_buf[3] == ' ' && from_buf[6] == ' ' 1702 && from_buf[9] == ':' && from_buf[12] == ':' 1703 && (from_buf[4] == ' ' || isdigit(from_buf[4])) 1704 && isdigit(from_buf[5]) /* dd */ 1705 && isdigit(from_buf[7]) && isdigit(from_buf[8]) /* HH */ 1706 && isdigit(from_buf[10]) && isdigit(from_buf[11]) /* MM */ 1707 && isdigit(from_buf[13]) && isdigit(from_buf[14]) /* SS */ 1708 && isupper(from_buf[0]) && islower(from_buf[1]) /* month */ 1709 && islower(from_buf[2])) 1710 found_ts = true; 1711 } 1712 if (!found_ts) { 1713 if (from_buf[0] == '-' && from_buf[1] == ' ') { 1714 /* NILVALUE */ 1715 if (to_iso) { 1716 /* with ISO = syslog-protocol output leave 1717 * it as is, because it is better to have 1718 * no timestamp than a wrong one. 1719 */ 1720 *to_buf = strdup("-"); 1721 } else { 1722 /* with BSD Syslog the field is reqired 1723 * so replace it with current time 1724 */ 1725 *to_buf = strdup(make_timestamp(NULL, false)); 1726 } 1727 return 2; 1728 } 1729 return 0; 1730 } 1731 1732 if (!from_iso && !to_iso) { 1733 /* copy BSD timestamp */ 1734 DPRINTF(D_CALL, "check_timestamp(): copy BSD timestamp\n"); 1735 *to_buf = strndup((char *)from_buf, BSD_TIMESTAMPLEN); 1736 return BSD_TIMESTAMPLEN; 1737 } else if (from_iso && to_iso) { 1738 /* copy ISO timestamp */ 1739 DPRINTF(D_CALL, "check_timestamp(): copy ISO timestamp\n"); 1740 if (!(q = (unsigned char *) strchr((char *)from_buf, ' '))) 1741 q = from_buf + strlen((char *)from_buf); 1742 *to_buf = strndup((char *)from_buf, q - from_buf); 1743 return q - from_buf; 1744 } else if (from_iso && !to_iso) { 1745 /* convert ISO->BSD */ 1746 struct tm parsed; 1747 time_t timeval; 1748 char tsbuf[MAX_TIMESTAMPLEN]; 1749 int i = 0; 1750 1751 DPRINTF(D_CALL, "check_timestamp(): convert ISO->BSD\n"); 1752 for(i = 0; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1753 && from_buf[i] != '.' && from_buf[i] != ' '; i++) 1754 tsbuf[i] = from_buf[i]; /* copy date & time */ 1755 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1756 && from_buf[i] != '+' && from_buf[i] != '-' 1757 && from_buf[i] != 'Z' && from_buf[i] != ' '; i++) 1758 ; /* skip fraction digits */ 1759 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1760 && from_buf[i] != ':' && from_buf[i] != ' ' ; i++) 1761 tsbuf[i] = from_buf[i]; /* copy TZ */ 1762 if (from_buf[i] == ':') i++; /* skip colon */ 1763 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1764 && from_buf[i] != ' ' ; i++) 1765 tsbuf[i] = from_buf[i]; /* copy TZ */ 1766 1767 (void)memset(&parsed, 0, sizeof(parsed)); 1768 parsed.tm_isdst = -1; 1769 (void)strptime(tsbuf, "%FT%T%z", &parsed); 1770 timeval = mktime(&parsed); 1771 1772 *to_buf = strndup(make_timestamp(&timeval, false), 1773 BSD_TIMESTAMPLEN); 1774 return i; 1775 } else if (!from_iso && to_iso) { 1776 /* convert BSD->ISO */ 1777 struct tm parsed; 1778 struct tm *current; 1779 time_t timeval; 1780 char *rc; 1781 1782 (void)memset(&parsed, 0, sizeof(parsed)); 1783 parsed.tm_isdst = -1; 1784 DPRINTF(D_CALL, "check_timestamp(): convert BSD->ISO\n"); 1785 rc = strptime((char *)from_buf, "%b %d %T", &parsed); 1786 current = gmtime(&now); 1787 1788 /* use current year and timezone */ 1789 parsed.tm_isdst = current->tm_isdst; 1790 parsed.tm_gmtoff = current->tm_gmtoff; 1791 parsed.tm_year = current->tm_year; 1792 if (current->tm_mon == 0 && parsed.tm_mon == 11) 1793 parsed.tm_year--; 1794 1795 timeval = mktime(&parsed); 1796 rc = make_timestamp(&timeval, true); 1797 *to_buf = strndup(rc, MAX_TIMESTAMPLEN-1); 1798 1799 return BSD_TIMESTAMPLEN; 1800 } else { 1801 DPRINTF(D_MISC, 1802 "Executing unreachable code in check_timestamp()\n"); 1803 return 0; 1804 } 1805 } 1806 1807 /* 1808 * Log a message to the appropriate log files, users, etc. based on 1809 * the priority. 1810 */ 1811 void 1812 logmsg(struct buf_msg *buffer) 1813 { 1814 struct filed *f; 1815 int fac, omask, prilev; 1816 1817 DPRINTF((D_CALL|D_BUFFER), "logmsg: buffer@%p, pri 0%o/%d, flags 0x%x," 1818 " timestamp \"%s\", from \"%s\", sd \"%s\", msg \"%s\"\n", 1819 buffer, buffer->pri, buffer->pri, buffer->flags, 1820 buffer->timestamp, buffer->recvhost, buffer->sd, buffer->msg); 1821 1822 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM)); 1823 1824 /* sanity check */ 1825 assert(buffer->refcount == 1); 1826 assert(buffer->msglen <= buffer->msgsize); 1827 assert(buffer->msgorig <= buffer->msg); 1828 assert((buffer->msg && buffer->msglen == strlen(buffer->msg)+1) 1829 || (!buffer->msg && !buffer->msglen)); 1830 if (!buffer->msg && !buffer->sd && !buffer->msgid) 1831 DPRINTF(D_BUFFER, "Empty message?\n"); 1832 1833 /* extract facility and priority level */ 1834 if (buffer->flags & MARK) 1835 fac = LOG_NFACILITIES; 1836 else 1837 fac = LOG_FAC(buffer->pri); 1838 prilev = LOG_PRI(buffer->pri); 1839 1840 /* log the message to the particular outputs */ 1841 if (!Initialized) { 1842 f = &consfile; 1843 f->f_file = open(ctty, O_WRONLY | O_NDELAY, 0); 1844 1845 if (f->f_file >= 0) { 1846 DELREF(f->f_prevmsg); 1847 f->f_prevmsg = NEWREF(buffer); 1848 fprintlog(f, NEWREF(buffer), NULL); 1849 DELREF(buffer); 1850 (void)close(f->f_file); 1851 } 1852 (void)sigsetmask(omask); 1853 return; 1854 } 1855 1856 for (f = Files; f; f = f->f_next) { 1857 /* skip messages that are incorrect priority */ 1858 if (!MATCH_PRI(f, fac, prilev) 1859 || f->f_pmask[fac] == INTERNAL_NOPRI) 1860 continue; 1861 1862 /* skip messages with the incorrect host name */ 1863 /* do we compare with host (IMHO correct) or recvhost */ 1864 /* (compatible)? */ 1865 if (f->f_host != NULL && buffer->host != NULL) { 1866 char shost[MAXHOSTNAMELEN + 1], *h; 1867 if (!BSDOutputFormat) { 1868 h = buffer->host; 1869 } else { 1870 (void)strlcpy(shost, buffer->host, 1871 sizeof(shost)); 1872 trim_anydomain(shost); 1873 h = shost; 1874 } 1875 switch (f->f_host[0]) { 1876 case '+': 1877 if (! matches_spec(h, f->f_host + 1, 1878 strcasestr)) 1879 continue; 1880 break; 1881 case '-': 1882 if (matches_spec(h, f->f_host + 1, 1883 strcasestr)) 1884 continue; 1885 break; 1886 } 1887 } 1888 1889 /* skip messages with the incorrect program name */ 1890 if (f->f_program != NULL && buffer->prog != NULL) { 1891 switch (f->f_program[0]) { 1892 case '+': 1893 if (!matches_spec(buffer->prog, 1894 f->f_program + 1, strstr)) 1895 continue; 1896 break; 1897 case '-': 1898 if (matches_spec(buffer->prog, 1899 f->f_program + 1, strstr)) 1900 continue; 1901 break; 1902 default: 1903 if (!matches_spec(buffer->prog, 1904 f->f_program, strstr)) 1905 continue; 1906 break; 1907 } 1908 } 1909 1910 if (f->f_type == F_CONSOLE && (buffer->flags & IGN_CONS)) 1911 continue; 1912 1913 /* don't output marks to recently written files */ 1914 if ((buffer->flags & MARK) 1915 && (now - f->f_time) < MarkInterval / 2) 1916 continue; 1917 1918 /* 1919 * suppress duplicate lines to this file unless NoRepeat 1920 */ 1921 #define MSG_FIELD_EQ(x) ((!buffer->x && !f->f_prevmsg->x) || \ 1922 (buffer->x && f->f_prevmsg->x && !strcmp(buffer->x, f->f_prevmsg->x))) 1923 1924 if ((buffer->flags & MARK) == 0 && 1925 f->f_prevmsg && 1926 buffer->msglen == f->f_prevmsg->msglen && 1927 !NoRepeat && 1928 MSG_FIELD_EQ(host) && 1929 MSG_FIELD_EQ(sd) && 1930 MSG_FIELD_EQ(msg) 1931 ) { 1932 f->f_prevcount++; 1933 DPRINTF(D_DATA, "Msg repeated %d times, %ld sec of %d\n", 1934 f->f_prevcount, (long)(now - f->f_time), 1935 repeatinterval[f->f_repeatcount]); 1936 /* 1937 * If domark would have logged this by now, 1938 * flush it now (so we don't hold isolated messages), 1939 * but back off so we'll flush less often 1940 * in the future. 1941 */ 1942 if (now > REPEATTIME(f)) { 1943 fprintlog(f, NEWREF(buffer), NULL); 1944 DELREF(buffer); 1945 BACKOFF(f); 1946 } 1947 } else { 1948 /* new line, save it */ 1949 if (f->f_prevcount) 1950 fprintlog(f, NULL, NULL); 1951 f->f_repeatcount = 0; 1952 DELREF(f->f_prevmsg); 1953 f->f_prevmsg = NEWREF(buffer); 1954 fprintlog(f, NEWREF(buffer), NULL); 1955 DELREF(buffer); 1956 } 1957 } 1958 (void)sigsetmask(omask); 1959 } 1960 1961 /* 1962 * format one buffer into output format given by flag BSDOutputFormat 1963 * line is allocated and has to be free()d by caller 1964 * size_t pointers are optional, if not NULL then they will return 1965 * different lenghts used for formatting and output 1966 */ 1967 #define OUT(x) ((x)?(x):"-") 1968 bool 1969 format_buffer(struct buf_msg *buffer, char **line, size_t *ptr_linelen, 1970 size_t *ptr_msglen, size_t *ptr_tlsprefixlen, size_t *ptr_prilen) 1971 { 1972 #define FPBUFSIZE 30 1973 static char ascii_empty[] = ""; 1974 char fp_buf[FPBUFSIZE] = "\0"; 1975 char *hostname, *shorthostname = NULL; 1976 char *ascii_sd = ascii_empty; 1977 char *ascii_msg = ascii_empty; 1978 size_t linelen, msglen, tlsprefixlen, prilen, j; 1979 1980 DPRINTF(D_CALL, "format_buffer(%p)\n", buffer); 1981 if (!buffer) return false; 1982 1983 /* All buffer fields are set with strdup(). To avoid problems 1984 * on memory exhaustion we allow them to be empty and replace 1985 * the essential fields with already allocated generic values. 1986 */ 1987 if (!buffer->timestamp) 1988 buffer->timestamp = timestamp; 1989 if (!buffer->host && !buffer->recvhost) 1990 buffer->host = LocalFQDN; 1991 1992 if (LogFacPri) { 1993 const char *f_s = NULL, *p_s = NULL; 1994 int fac = buffer->pri & LOG_FACMASK; 1995 int pri = LOG_PRI(buffer->pri); 1996 char f_n[5], p_n[5]; 1997 1998 if (LogFacPri > 1) { 1999 CODE *c; 2000 2001 for (c = facilitynames; c->c_name != NULL; c++) { 2002 if (c->c_val == fac) { 2003 f_s = c->c_name; 2004 break; 2005 } 2006 } 2007 for (c = prioritynames; c->c_name != NULL; c++) { 2008 if (c->c_val == pri) { 2009 p_s = c->c_name; 2010 break; 2011 } 2012 } 2013 } 2014 if (f_s == NULL) { 2015 snprintf(f_n, sizeof(f_n), "%d", LOG_FAC(fac)); 2016 f_s = f_n; 2017 } 2018 if (p_s == NULL) { 2019 snprintf(p_n, sizeof(p_n), "%d", pri); 2020 p_s = p_n; 2021 } 2022 snprintf(fp_buf, sizeof(fp_buf), "<%s.%s>", f_s, p_s); 2023 } 2024 2025 /* hostname or FQDN */ 2026 hostname = (buffer->host ? buffer->host : buffer->recvhost); 2027 if (BSDOutputFormat 2028 && (shorthostname = strdup(hostname))) { 2029 /* if the previous BSD output format with "host [recvhost]:" 2030 * gets implemented, this is the right place to distinguish 2031 * between buffer->host and buffer->recvhost 2032 */ 2033 trim_anydomain(shorthostname); 2034 hostname = shorthostname; 2035 } 2036 2037 /* new message formatting: 2038 * instead of using iov always assemble one complete TLS-ready line 2039 * with length and priority (depending on BSDOutputFormat either in 2040 * BSD Syslog or syslog-protocol format) 2041 * 2042 * additionally save the length of the prefixes, 2043 * so UDP destinations can skip the length prefix and 2044 * file/pipe/wall destinations can omit length and priority 2045 */ 2046 /* first determine required space */ 2047 if (BSDOutputFormat) { 2048 /* only output ASCII chars */ 2049 if (buffer->sd) 2050 ascii_sd = copy_utf8_ascii(buffer->sd, 2051 strlen(buffer->sd)); 2052 if (buffer->msg) { 2053 if (IS_BOM(buffer->msg)) 2054 ascii_msg = copy_utf8_ascii(buffer->msg, 2055 buffer->msglen - 1); 2056 else /* assume already converted at input */ 2057 ascii_msg = buffer->msg; 2058 } 2059 msglen = snprintf(NULL, 0, "<%d>%s%.15s %s %s%s%s%s: %s%s%s", 2060 buffer->pri, fp_buf, buffer->timestamp, 2061 hostname, OUT(buffer->prog), 2062 buffer->pid ? "[" : "", 2063 buffer->pid ? buffer->pid : "", 2064 buffer->pid ? "]" : "", ascii_sd, 2065 (buffer->sd && buffer->msg ? " ": ""), ascii_msg); 2066 } else 2067 msglen = snprintf(NULL, 0, "<%d>1 %s%s %s %s %s %s %s%s%s", 2068 buffer->pri, fp_buf, buffer->timestamp, 2069 hostname, OUT(buffer->prog), OUT(buffer->pid), 2070 OUT(buffer->msgid), OUT(buffer->sd), 2071 (buffer->msg ? " ": ""), 2072 (buffer->msg ? buffer->msg: "")); 2073 /* add space for length prefix */ 2074 tlsprefixlen = 0; 2075 for (j = msglen; j; j /= 10) 2076 tlsprefixlen++; 2077 /* one more for the space */ 2078 tlsprefixlen++; 2079 2080 prilen = snprintf(NULL, 0, "<%d>", buffer->pri); 2081 if (!BSDOutputFormat) 2082 prilen += 2; /* version char and space */ 2083 MALLOC(*line, msglen + tlsprefixlen + 1); 2084 if (BSDOutputFormat) 2085 linelen = snprintf(*line, 2086 msglen + tlsprefixlen + 1, 2087 "%zu <%d>%s%.15s %s %s%s%s%s: %s%s%s", 2088 msglen, buffer->pri, fp_buf, buffer->timestamp, 2089 hostname, OUT(buffer->prog), 2090 (buffer->pid ? "[" : ""), 2091 (buffer->pid ? buffer->pid : ""), 2092 (buffer->pid ? "]" : ""), ascii_sd, 2093 (buffer->sd && buffer->msg ? " ": ""), ascii_msg); 2094 else 2095 linelen = snprintf(*line, 2096 msglen + tlsprefixlen + 1, 2097 "%zu <%d>1 %s%s %s %s %s %s %s%s%s", 2098 msglen, buffer->pri, fp_buf, buffer->timestamp, 2099 hostname, OUT(buffer->prog), OUT(buffer->pid), 2100 OUT(buffer->msgid), OUT(buffer->sd), 2101 (buffer->msg ? " ": ""), 2102 (buffer->msg ? buffer->msg: "")); 2103 DPRINTF(D_DATA, "formatted %zu octets to: '%.*s' (linelen %zu, " 2104 "msglen %zu, tlsprefixlen %zu, prilen %zu)\n", linelen, 2105 (int)linelen, *line, linelen, msglen, tlsprefixlen, prilen); 2106 2107 FREEPTR(shorthostname); 2108 if (ascii_sd != ascii_empty) 2109 FREEPTR(ascii_sd); 2110 if (ascii_msg != ascii_empty && ascii_msg != buffer->msg) 2111 FREEPTR(ascii_msg); 2112 2113 if (ptr_linelen) *ptr_linelen = linelen; 2114 if (ptr_msglen) *ptr_msglen = msglen; 2115 if (ptr_tlsprefixlen) *ptr_tlsprefixlen = tlsprefixlen; 2116 if (ptr_prilen) *ptr_prilen = prilen; 2117 return true; 2118 } 2119 2120 /* 2121 * if qentry == NULL: new message, if temporarily undeliverable it will be enqueued 2122 * if qentry != NULL: a temporarily undeliverable message will not be enqueued, 2123 * but after delivery be removed from the queue 2124 */ 2125 void 2126 fprintlog(struct filed *f, struct buf_msg *passedbuffer, struct buf_queue *qentry) 2127 { 2128 static char crnl[] = "\r\n"; 2129 struct buf_msg *buffer = passedbuffer; 2130 struct iovec iov[4]; 2131 struct iovec *v = iov; 2132 bool error = false; 2133 int e = 0, len = 0; 2134 size_t msglen, linelen, tlsprefixlen, prilen; 2135 char *p, *line = NULL, *lineptr = NULL; 2136 #ifndef DISABLE_SIGN 2137 bool newhash = false; 2138 #endif 2139 #define REPBUFSIZE 80 2140 char greetings[200]; 2141 #define ADDEV() do { v++; assert((size_t)(v - iov) < A_CNT(iov)); } while(/*CONSTCOND*/0) 2142 2143 DPRINTF(D_CALL, "fprintlog(%p, %p, %p)\n", f, buffer, qentry); 2144 2145 f->f_time = now; 2146 2147 /* increase refcount here and lower again at return. 2148 * this enables the buffer in the else branch to be freed 2149 * --> every branch needs one NEWREF() or buf_msg_new()! */ 2150 if (buffer) { 2151 (void)NEWREF(buffer); 2152 } else { 2153 if (f->f_prevcount > 1) { 2154 /* possible syslog-sign incompatibility: 2155 * assume destinations f1 and f2 share one SG and 2156 * get the same message sequence. 2157 * 2158 * now both f1 and f2 generate "repeated" messages 2159 * "repeated" messages are different due to different 2160 * timestamps 2161 * the SG will get hashes for the two "repeated" messages 2162 * 2163 * now both f1 and f2 are just fine, but a verification 2164 * will report that each 'lost' a message, i.e. the 2165 * other's "repeated" message 2166 * 2167 * conditions for 'safe configurations': 2168 * - use NoRepeat option, 2169 * - use SG 3, or 2170 * - have exactly one destination for every PRI 2171 */ 2172 buffer = buf_msg_new(REPBUFSIZE); 2173 buffer->msglen = snprintf(buffer->msg, REPBUFSIZE, 2174 "last message repeated %d times", f->f_prevcount); 2175 buffer->timestamp = 2176 strdup(make_timestamp(NULL, !BSDOutputFormat)); 2177 buffer->pri = f->f_prevmsg->pri; 2178 buffer->host = LocalFQDN; 2179 buffer->prog = appname; 2180 buffer->pid = include_pid; 2181 2182 } else { 2183 buffer = NEWREF(f->f_prevmsg); 2184 } 2185 } 2186 2187 /* no syslog-sign messages to tty/console/... */ 2188 if ((buffer->flags & SIGN_MSG) 2189 && ((f->f_type == F_UNUSED) 2190 || (f->f_type == F_TTY) 2191 || (f->f_type == F_CONSOLE) 2192 || (f->f_type == F_USERS) 2193 || (f->f_type == F_WALL) 2194 || (f->f_type == F_FIFO))) { 2195 DELREF(buffer); 2196 return; 2197 } 2198 2199 /* buffering works only for few types */ 2200 if (qentry 2201 && (f->f_type != F_TLS) 2202 && (f->f_type != F_PIPE) 2203 && (f->f_type != F_FILE) 2204 && (f->f_type != F_FIFO)) { 2205 errno = 0; 2206 logerror("Warning: unexpected message type %d in buffer", 2207 f->f_type); 2208 DELREF(buffer); 2209 return; 2210 } 2211 2212 if (!format_buffer(buffer, &line, 2213 &linelen, &msglen, &tlsprefixlen, &prilen)) { 2214 DPRINTF(D_CALL, "format_buffer() failed, skip message\n"); 2215 DELREF(buffer); 2216 return; 2217 } 2218 /* assert maximum message length */ 2219 if (TypeInfo[f->f_type].max_msg_length != -1 2220 && (size_t)TypeInfo[f->f_type].max_msg_length 2221 < linelen - tlsprefixlen - prilen) { 2222 linelen = TypeInfo[f->f_type].max_msg_length 2223 + tlsprefixlen + prilen; 2224 DPRINTF(D_DATA, "truncating oversized message to %zu octets\n", 2225 linelen); 2226 } 2227 2228 #ifndef DISABLE_SIGN 2229 /* keep state between appending the hash (before buffer is sent) 2230 * and possibly sending a SB (after buffer is sent): */ 2231 /* get hash */ 2232 if (!(buffer->flags & SIGN_MSG) && !qentry) { 2233 char *hash = NULL; 2234 struct signature_group_t *sg; 2235 2236 if ((sg = sign_get_sg(buffer->pri, f)) != NULL) { 2237 if (sign_msg_hash(line + tlsprefixlen, &hash)) 2238 newhash = sign_append_hash(hash, sg); 2239 else 2240 DPRINTF(D_SIGN, 2241 "Unable to hash line \"%s\"\n", line); 2242 } 2243 } 2244 #endif /* !DISABLE_SIGN */ 2245 2246 /* set start and length of buffer and/or fill iovec */ 2247 switch (f->f_type) { 2248 case F_UNUSED: 2249 /* nothing */ 2250 break; 2251 case F_TLS: 2252 /* nothing, as TLS uses whole buffer to send */ 2253 lineptr = line; 2254 len = linelen; 2255 break; 2256 case F_FORW: 2257 lineptr = line + tlsprefixlen; 2258 len = linelen - tlsprefixlen; 2259 break; 2260 case F_PIPE: 2261 case F_FIFO: 2262 case F_FILE: /* fallthrough */ 2263 if (f->f_flags & FFLAG_FULL) { 2264 v->iov_base = line + tlsprefixlen; 2265 v->iov_len = linelen - tlsprefixlen; 2266 } else { 2267 v->iov_base = line + tlsprefixlen + prilen; 2268 v->iov_len = linelen - tlsprefixlen - prilen; 2269 } 2270 ADDEV(); 2271 v->iov_base = &crnl[1]; 2272 v->iov_len = 1; 2273 ADDEV(); 2274 break; 2275 case F_CONSOLE: 2276 case F_TTY: 2277 /* filter non-ASCII */ 2278 p = line; 2279 while (*p) { 2280 *p = FORCE2ASCII(*p); 2281 p++; 2282 } 2283 v->iov_base = line + tlsprefixlen + prilen; 2284 v->iov_len = linelen - tlsprefixlen - prilen; 2285 ADDEV(); 2286 v->iov_base = crnl; 2287 v->iov_len = 2; 2288 ADDEV(); 2289 break; 2290 case F_WALL: 2291 v->iov_base = greetings; 2292 v->iov_len = snprintf(greetings, sizeof(greetings), 2293 "\r\n\7Message from syslogd@%s at %s ...\r\n", 2294 (buffer->host ? buffer->host : buffer->recvhost), 2295 buffer->timestamp); 2296 ADDEV(); 2297 case F_USERS: /* fallthrough */ 2298 /* filter non-ASCII */ 2299 p = line; 2300 while (*p) { 2301 *p = FORCE2ASCII(*p); 2302 p++; 2303 } 2304 v->iov_base = line + tlsprefixlen + prilen; 2305 v->iov_len = linelen - tlsprefixlen - prilen; 2306 ADDEV(); 2307 v->iov_base = &crnl[1]; 2308 v->iov_len = 1; 2309 ADDEV(); 2310 break; 2311 } 2312 2313 /* send */ 2314 switch (f->f_type) { 2315 case F_UNUSED: 2316 DPRINTF(D_MISC, "Logging to %s\n", TypeInfo[f->f_type].name); 2317 break; 2318 2319 case F_FORW: 2320 DPRINTF(D_MISC, "Logging to %s %s\n", 2321 TypeInfo[f->f_type].name, f->f_un.f_forw.f_hname); 2322 udp_send(f, lineptr, len); 2323 break; 2324 2325 #ifndef DISABLE_TLS 2326 case F_TLS: 2327 DPRINTF(D_MISC, "Logging to %s %s\n", 2328 TypeInfo[f->f_type].name, 2329 f->f_un.f_tls.tls_conn->hostname); 2330 /* make sure every message gets queued once 2331 * it will be removed when sendmsg is sent and free()d */ 2332 if (!qentry) 2333 qentry = message_queue_add(f, NEWREF(buffer)); 2334 (void)tls_send(f, lineptr, len, qentry); 2335 break; 2336 #endif /* !DISABLE_TLS */ 2337 2338 case F_PIPE: 2339 DPRINTF(D_MISC, "Logging to %s %s\n", 2340 TypeInfo[f->f_type].name, f->f_un.f_pipe.f_pname); 2341 if (f->f_un.f_pipe.f_pid == 0) { 2342 /* (re-)open */ 2343 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname, 2344 &f->f_un.f_pipe.f_pid)) < 0) { 2345 f->f_type = F_UNUSED; 2346 logerror("%s", f->f_un.f_pipe.f_pname); 2347 message_queue_freeall(f); 2348 break; 2349 } else if (!qentry) /* prevent recursion */ 2350 SEND_QUEUE(f); 2351 } 2352 if (writev(f->f_file, iov, v - iov) < 0) { 2353 e = errno; 2354 if (f->f_un.f_pipe.f_pid > 0) { 2355 (void) close(f->f_file); 2356 deadq_enter(f->f_un.f_pipe.f_pid, 2357 f->f_un.f_pipe.f_pname); 2358 } 2359 f->f_un.f_pipe.f_pid = 0; 2360 /* 2361 * If the error was EPIPE, then what is likely 2362 * has happened is we have a command that is 2363 * designed to take a single message line and 2364 * then exit, but we tried to feed it another 2365 * one before we reaped the child and thus 2366 * reset our state. 2367 * 2368 * Well, now we've reset our state, so try opening 2369 * the pipe and sending the message again if EPIPE 2370 * was the error. 2371 */ 2372 if (e == EPIPE) { 2373 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname, 2374 &f->f_un.f_pipe.f_pid)) < 0) { 2375 f->f_type = F_UNUSED; 2376 logerror("%s", f->f_un.f_pipe.f_pname); 2377 message_queue_freeall(f); 2378 break; 2379 } 2380 if (writev(f->f_file, iov, v - iov) < 0) { 2381 e = errno; 2382 if (f->f_un.f_pipe.f_pid > 0) { 2383 (void) close(f->f_file); 2384 deadq_enter(f->f_un.f_pipe.f_pid, 2385 f->f_un.f_pipe.f_pname); 2386 } 2387 f->f_un.f_pipe.f_pid = 0; 2388 error = true; /* enqueue on return */ 2389 } else 2390 e = 0; 2391 } 2392 if (e != 0 && !error) { 2393 errno = e; 2394 logerror("%s", f->f_un.f_pipe.f_pname); 2395 } 2396 } 2397 if (e == 0 && qentry) { /* sent buffered msg */ 2398 message_queue_remove(f, qentry); 2399 } 2400 break; 2401 2402 case F_CONSOLE: 2403 if (buffer->flags & IGN_CONS) { 2404 DPRINTF(D_MISC, "Logging to %s (ignored)\n", 2405 TypeInfo[f->f_type].name); 2406 break; 2407 } 2408 /* FALLTHROUGH */ 2409 2410 case F_TTY: 2411 case F_FILE: 2412 DPRINTF(D_MISC, "Logging to %s %s\n", 2413 TypeInfo[f->f_type].name, f->f_un.f_fname); 2414 again: 2415 if ((f->f_type == F_FILE ? writev(f->f_file, iov, v - iov) : 2416 writev1(f->f_file, iov, v - iov)) < 0) { 2417 e = errno; 2418 if (f->f_type == F_FILE && e == ENOSPC) { 2419 int lasterror = f->f_lasterror; 2420 f->f_lasterror = e; 2421 if (lasterror != e) 2422 logerror("%s", f->f_un.f_fname); 2423 error = true; /* enqueue on return */ 2424 } 2425 (void)close(f->f_file); 2426 /* 2427 * Check for errors on TTY's due to loss of tty 2428 */ 2429 if ((e == EIO || e == EBADF) && f->f_type != F_FILE) { 2430 f->f_file = open(f->f_un.f_fname, 2431 O_WRONLY|O_APPEND|O_NONBLOCK, 0); 2432 if (f->f_file < 0) { 2433 f->f_type = F_UNUSED; 2434 logerror("%s", f->f_un.f_fname); 2435 message_queue_freeall(f); 2436 } else 2437 goto again; 2438 } else { 2439 f->f_type = F_UNUSED; 2440 errno = e; 2441 f->f_lasterror = e; 2442 logerror("%s", f->f_un.f_fname); 2443 message_queue_freeall(f); 2444 } 2445 } else { 2446 f->f_lasterror = 0; 2447 if ((buffer->flags & SYNC_FILE) 2448 && (f->f_flags & FFLAG_SYNC)) 2449 (void)fsync(f->f_file); 2450 /* Problem with files: We cannot check beforehand if 2451 * they would be writeable and call send_queue() first. 2452 * So we call send_queue() after a successful write, 2453 * which means the first message will be out of order. 2454 */ 2455 if (!qentry) /* prevent recursion */ 2456 SEND_QUEUE(f); 2457 else if (qentry) /* sent buffered msg */ 2458 message_queue_remove(f, qentry); 2459 } 2460 break; 2461 2462 case F_FIFO: 2463 DPRINTF(D_MISC, "Logging to %s %s\n", 2464 TypeInfo[f->f_type].name, f->f_un.f_fname); 2465 if (f->f_file < 0) { 2466 f->f_file = 2467 open(f->f_un.f_fname, O_WRONLY|O_NONBLOCK, 0); 2468 e = errno; 2469 if (f->f_file < 0 && e == ENXIO) { 2470 /* Drop messages with no reader */ 2471 if (qentry) 2472 message_queue_remove(f, qentry); 2473 break; 2474 } 2475 } 2476 2477 if (f->f_file >= 0 && writev(f->f_file, iov, v - iov) < 0) { 2478 e = errno; 2479 2480 /* Enqueue if the fifo buffer is full */ 2481 if (e == EAGAIN) { 2482 if (f->f_lasterror != e) 2483 logerror("%s", f->f_un.f_fname); 2484 f->f_lasterror = e; 2485 error = true; /* enqueue on return */ 2486 break; 2487 } 2488 2489 close(f->f_file); 2490 f->f_file = -1; 2491 2492 /* Drop messages with no reader */ 2493 if (e == EPIPE) { 2494 if (qentry) 2495 message_queue_remove(f, qentry); 2496 break; 2497 } 2498 } 2499 2500 if (f->f_file < 0) { 2501 f->f_type = F_UNUSED; 2502 errno = e; 2503 f->f_lasterror = e; 2504 logerror("%s", f->f_un.f_fname); 2505 message_queue_freeall(f); 2506 break; 2507 } 2508 2509 f->f_lasterror = 0; 2510 if (!qentry) /* prevent recursion (see comment for F_FILE) */ 2511 SEND_QUEUE(f); 2512 if (qentry) /* sent buffered msg */ 2513 message_queue_remove(f, qentry); 2514 break; 2515 2516 case F_USERS: 2517 case F_WALL: 2518 DPRINTF(D_MISC, "Logging to %s\n", TypeInfo[f->f_type].name); 2519 wallmsg(f, iov, v - iov); 2520 break; 2521 } 2522 f->f_prevcount = 0; 2523 2524 if (error && !qentry) 2525 message_queue_add(f, NEWREF(buffer)); 2526 #ifndef DISABLE_SIGN 2527 if (newhash) { 2528 struct signature_group_t *sg; 2529 sg = sign_get_sg(buffer->pri, f); 2530 (void)sign_send_signature_block(sg, false); 2531 } 2532 #endif /* !DISABLE_SIGN */ 2533 /* this belongs to the ad-hoc buffer at the first if(buffer) */ 2534 DELREF(buffer); 2535 /* TLS frees on its own */ 2536 if (f->f_type != F_TLS) 2537 FREEPTR(line); 2538 } 2539 2540 /* send one line by UDP */ 2541 void 2542 udp_send(struct filed *f, char *line, size_t len) 2543 { 2544 int lsent, fail, retry, j; 2545 struct addrinfo *r; 2546 2547 DPRINTF((D_NET|D_CALL), "udp_send(f=%p, line=\"%s\", " 2548 "len=%zu) to dest.\n", f, line, len); 2549 2550 if (!finet) 2551 return; 2552 2553 lsent = -1; 2554 fail = 0; 2555 assert(f->f_type == F_FORW); 2556 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) { 2557 retry = 0; 2558 for (j = 0; j < finet->fd; j++) { 2559 if (finet[j+1].af != r->ai_family) 2560 continue; 2561 sendagain: 2562 lsent = sendto(finet[j+1].fd, line, len, 0, 2563 r->ai_addr, r->ai_addrlen); 2564 if (lsent == -1) { 2565 switch (errno) { 2566 case ENOBUFS: 2567 /* wait/retry/drop */ 2568 if (++retry < 5) { 2569 usleep(1000); 2570 goto sendagain; 2571 } 2572 break; 2573 case EHOSTDOWN: 2574 case EHOSTUNREACH: 2575 case ENETDOWN: 2576 /* drop */ 2577 break; 2578 default: 2579 /* busted */ 2580 fail++; 2581 break; 2582 } 2583 } else if ((size_t)lsent == len) 2584 break; 2585 } 2586 if ((size_t)lsent != len && fail) { 2587 f->f_type = F_UNUSED; 2588 logerror("sendto() failed"); 2589 } 2590 } 2591 } 2592 2593 /* 2594 * WALLMSG -- Write a message to the world at large 2595 * 2596 * Write the specified message to either the entire 2597 * world, or a list of approved users. 2598 */ 2599 void 2600 wallmsg(struct filed *f, struct iovec *iov, size_t iovcnt) 2601 { 2602 #ifdef __NetBSD_Version__ 2603 static int reenter; /* avoid calling ourselves */ 2604 int i; 2605 char *p; 2606 struct utmpentry *ep; 2607 2608 if (reenter++) 2609 return; 2610 2611 (void)getutentries(NULL, &ep); 2612 /* NOSTRICT */ 2613 for (; ep; ep = ep->next) { 2614 if (f->f_type == F_WALL) { 2615 if ((p = ttymsg(iov, iovcnt, ep->line, TTYMSGTIME)) 2616 != NULL) { 2617 errno = 0; /* already in msg */ 2618 logerror("%s", p); 2619 } 2620 continue; 2621 } 2622 /* should we send the message to this user? */ 2623 for (i = 0; i < MAXUNAMES; i++) { 2624 if (!f->f_un.f_uname[i][0]) 2625 break; 2626 if (strcmp(f->f_un.f_uname[i], ep->name) == 0) { 2627 struct stat st; 2628 char tty[MAXPATHLEN]; 2629 snprintf(tty, sizeof(tty), "%s/%s", _PATH_DEV, 2630 ep->line); 2631 if (stat(tty, &st) != -1 && 2632 (st.st_mode & S_IWGRP) == 0) 2633 break; 2634 2635 if ((p = ttymsg(iov, iovcnt, ep->line, 2636 TTYMSGTIME)) != NULL) { 2637 errno = 0; /* already in msg */ 2638 logerror("%s", p); 2639 } 2640 break; 2641 } 2642 } 2643 } 2644 reenter = 0; 2645 #endif /* __NetBSD_Version__ */ 2646 } 2647 2648 void 2649 /*ARGSUSED*/ 2650 reapchild(int fd, short event, void *ev) 2651 { 2652 int status; 2653 pid_t pid; 2654 struct filed *f; 2655 2656 while ((pid = wait3(&status, WNOHANG, NULL)) > 0) { 2657 if (!Initialized || ShuttingDown) { 2658 /* 2659 * Be silent while we are initializing or 2660 * shutting down. 2661 */ 2662 continue; 2663 } 2664 2665 if (deadq_remove(pid)) 2666 continue; 2667 2668 /* Now, look in the list of active processes. */ 2669 for (f = Files; f != NULL; f = f->f_next) { 2670 if (f->f_type == F_PIPE && 2671 f->f_un.f_pipe.f_pid == pid) { 2672 (void) close(f->f_file); 2673 f->f_un.f_pipe.f_pid = 0; 2674 log_deadchild(pid, status, 2675 f->f_un.f_pipe.f_pname); 2676 break; 2677 } 2678 } 2679 } 2680 } 2681 2682 /* 2683 * Return a printable representation of a host address (FQDN if available) 2684 */ 2685 const char * 2686 cvthname(struct sockaddr_storage *f) 2687 { 2688 int error; 2689 int niflag = NI_DGRAM; 2690 static char host[NI_MAXHOST], ip[NI_MAXHOST]; 2691 2692 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 2693 ip, sizeof ip, NULL, 0, NI_NUMERICHOST|niflag); 2694 2695 DPRINTF(D_CALL, "cvthname(%s)\n", ip); 2696 2697 if (error) { 2698 DPRINTF(D_NET, "Malformed from address %s\n", 2699 gai_strerror(error)); 2700 return "???"; 2701 } 2702 2703 if (!UseNameService) 2704 return ip; 2705 2706 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 2707 host, sizeof host, NULL, 0, niflag); 2708 if (error) { 2709 DPRINTF(D_NET, "Host name for your address (%s) unknown\n", ip); 2710 return ip; 2711 } 2712 2713 return host; 2714 } 2715 2716 void 2717 trim_anydomain(char *host) 2718 { 2719 bool onlydigits = true; 2720 int i; 2721 2722 if (!BSDOutputFormat) 2723 return; 2724 2725 /* if non-digits found, then assume hostname and cut at first dot (this 2726 * case also covers IPv6 addresses which should not contain dots), 2727 * if only digits then assume IPv4 address and do not cut at all */ 2728 for (i = 0; host[i]; i++) { 2729 if (host[i] == '.' && !onlydigits) 2730 host[i] = '\0'; 2731 else if (!isdigit((unsigned char)host[i]) && host[i] != '.') 2732 onlydigits = false; 2733 } 2734 } 2735 2736 static void 2737 /*ARGSUSED*/ 2738 domark(int fd, short event, void *ev) 2739 { 2740 struct event *ev_pass = (struct event *)ev; 2741 struct filed *f; 2742 dq_t q, nextq; 2743 sigset_t newmask, omask; 2744 2745 schedule_event(&ev_pass, 2746 &((struct timeval){TIMERINTVL, 0}), 2747 domark, ev_pass); 2748 DPRINTF((D_CALL|D_EVENT), "domark()\n"); 2749 2750 BLOCK_SIGNALS(omask, newmask); 2751 now = time(NULL); 2752 MarkSeq += TIMERINTVL; 2753 if (MarkSeq >= MarkInterval) { 2754 logmsg_async(LOG_INFO, NULL, "-- MARK --", ADDDATE|MARK); 2755 MarkSeq = 0; 2756 } 2757 2758 for (f = Files; f; f = f->f_next) { 2759 if (f->f_prevcount && now >= REPEATTIME(f)) { 2760 DPRINTF(D_DATA, "Flush %s: repeated %d times, %d sec.\n", 2761 TypeInfo[f->f_type].name, f->f_prevcount, 2762 repeatinterval[f->f_repeatcount]); 2763 fprintlog(f, NULL, NULL); 2764 BACKOFF(f); 2765 } 2766 } 2767 message_allqueues_check(); 2768 RESTORE_SIGNALS(omask); 2769 2770 /* Walk the dead queue, and see if we should signal somebody. */ 2771 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = nextq) { 2772 nextq = TAILQ_NEXT(q, dq_entries); 2773 switch (q->dq_timeout) { 2774 case 0: 2775 /* Already signalled once, try harder now. */ 2776 if (kill(q->dq_pid, SIGKILL) != 0) 2777 (void) deadq_remove(q->dq_pid); 2778 break; 2779 2780 case 1: 2781 /* 2782 * Timed out on the dead queue, send terminate 2783 * signal. Note that we leave the removal from 2784 * the dead queue to reapchild(), which will 2785 * also log the event (unless the process 2786 * didn't even really exist, in case we simply 2787 * drop it from the dead queue). 2788 */ 2789 if (kill(q->dq_pid, SIGTERM) != 0) { 2790 (void) deadq_remove(q->dq_pid); 2791 break; 2792 } 2793 /* FALLTHROUGH */ 2794 2795 default: 2796 q->dq_timeout--; 2797 } 2798 } 2799 #ifndef DISABLE_SIGN 2800 if (GlobalSign.rsid) { /* check if initialized */ 2801 struct signature_group_t *sg; 2802 STAILQ_FOREACH(sg, &GlobalSign.SigGroups, entries) { 2803 sign_send_certificate_block(sg); 2804 } 2805 } 2806 #endif /* !DISABLE_SIGN */ 2807 } 2808 2809 /* 2810 * Print syslogd errors some place. 2811 */ 2812 void 2813 logerror(const char *fmt, ...) 2814 { 2815 static int logerror_running; 2816 va_list ap; 2817 char tmpbuf[BUFSIZ]; 2818 char buf[BUFSIZ]; 2819 char *outbuf; 2820 2821 /* If there's an error while trying to log an error, give up. */ 2822 if (logerror_running) 2823 return; 2824 logerror_running = 1; 2825 2826 va_start(ap, fmt); 2827 (void)vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap); 2828 va_end(ap); 2829 2830 if (errno) { 2831 (void)snprintf(buf, sizeof(buf), "%s: %s", 2832 tmpbuf, strerror(errno)); 2833 outbuf = buf; 2834 } else { 2835 (void)snprintf(buf, sizeof(buf), "%s", tmpbuf); 2836 outbuf = tmpbuf; 2837 } 2838 2839 if (daemonized) 2840 logmsg_async(LOG_SYSLOG|LOG_ERR, NULL, outbuf, ADDDATE); 2841 if (!daemonized && Debug) 2842 DPRINTF(D_MISC, "%s\n", outbuf); 2843 if (!daemonized && !Debug) 2844 printf("%s\n", outbuf); 2845 2846 logerror_running = 0; 2847 } 2848 2849 /* 2850 * Print syslogd info some place. 2851 */ 2852 void 2853 loginfo(const char *fmt, ...) 2854 { 2855 va_list ap; 2856 char buf[BUFSIZ]; 2857 2858 va_start(ap, fmt); 2859 (void)vsnprintf(buf, sizeof(buf), fmt, ap); 2860 va_end(ap); 2861 2862 DPRINTF(D_MISC, "%s\n", buf); 2863 logmsg_async(LOG_SYSLOG|LOG_INFO, NULL, buf, ADDDATE); 2864 } 2865 2866 #ifndef DISABLE_TLS 2867 static inline void 2868 free_incoming_tls_sockets(void) 2869 { 2870 struct TLS_Incoming_Conn *tls_in; 2871 int i; 2872 2873 /* 2874 * close all listening and connected TLS sockets 2875 */ 2876 if (TLS_Listen_Set) 2877 for (i = 0; i < TLS_Listen_Set->fd; i++) { 2878 if (close(TLS_Listen_Set[i+1].fd) == -1) 2879 logerror("close() failed"); 2880 DEL_EVENT(TLS_Listen_Set[i+1].ev); 2881 FREEPTR(TLS_Listen_Set[i+1].ev); 2882 } 2883 FREEPTR(TLS_Listen_Set); 2884 /* close/free incoming TLS connections */ 2885 while (!SLIST_EMPTY(&TLS_Incoming_Head)) { 2886 tls_in = SLIST_FIRST(&TLS_Incoming_Head); 2887 SLIST_REMOVE_HEAD(&TLS_Incoming_Head, entries); 2888 FREEPTR(tls_in->inbuf); 2889 free_tls_conn(tls_in->tls_conn); 2890 free(tls_in); 2891 } 2892 } 2893 #endif /* !DISABLE_TLS */ 2894 2895 void 2896 /*ARGSUSED*/ 2897 die(int fd, short event, void *ev) 2898 { 2899 struct filed *f, *next; 2900 char **p; 2901 sigset_t newmask, omask; 2902 int i; 2903 size_t j; 2904 2905 ShuttingDown = 1; /* Don't log SIGCHLDs. */ 2906 /* prevent recursive signals */ 2907 BLOCK_SIGNALS(omask, newmask); 2908 2909 errno = 0; 2910 if (ev != NULL) 2911 logerror("Exiting on signal %d", fd); 2912 else 2913 logerror("Fatal error, exiting"); 2914 2915 /* 2916 * flush any pending output 2917 */ 2918 for (f = Files; f != NULL; f = f->f_next) { 2919 /* flush any pending output */ 2920 if (f->f_prevcount) 2921 fprintlog(f, NULL, NULL); 2922 SEND_QUEUE(f); 2923 } 2924 2925 #ifndef DISABLE_TLS 2926 free_incoming_tls_sockets(); 2927 #endif /* !DISABLE_TLS */ 2928 #ifndef DISABLE_SIGN 2929 sign_global_free(); 2930 #endif /* !DISABLE_SIGN */ 2931 2932 /* 2933 * Close all open log files. 2934 */ 2935 for (f = Files; f != NULL; f = next) { 2936 message_queue_freeall(f); 2937 2938 switch (f->f_type) { 2939 case F_FILE: 2940 case F_TTY: 2941 case F_CONSOLE: 2942 case F_FIFO: 2943 if (f->f_file >= 0) 2944 (void)close(f->f_file); 2945 break; 2946 case F_PIPE: 2947 if (f->f_un.f_pipe.f_pid > 0) { 2948 (void)close(f->f_file); 2949 } 2950 f->f_un.f_pipe.f_pid = 0; 2951 break; 2952 case F_FORW: 2953 if (f->f_un.f_forw.f_addr) 2954 freeaddrinfo(f->f_un.f_forw.f_addr); 2955 break; 2956 #ifndef DISABLE_TLS 2957 case F_TLS: 2958 free_tls_conn(f->f_un.f_tls.tls_conn); 2959 break; 2960 #endif /* !DISABLE_TLS */ 2961 } 2962 next = f->f_next; 2963 DELREF(f->f_prevmsg); 2964 FREEPTR(f->f_program); 2965 FREEPTR(f->f_host); 2966 DEL_EVENT(f->f_sq_event); 2967 free((char *)f); 2968 } 2969 2970 /* 2971 * Close all open UDP sockets 2972 */ 2973 if (finet) { 2974 for (i = 0; i < finet->fd; i++) { 2975 if (close(finet[i+1].fd) < 0) { 2976 logerror("close() failed"); 2977 die(0, 0, NULL); 2978 } 2979 DEL_EVENT(finet[i+1].ev); 2980 FREEPTR(finet[i+1].ev); 2981 } 2982 FREEPTR(finet); 2983 } 2984 2985 /* free config options */ 2986 for (j = 0; j < A_CNT(TypeInfo); j++) { 2987 FREEPTR(TypeInfo[j].queue_length_string); 2988 FREEPTR(TypeInfo[j].queue_size_string); 2989 } 2990 2991 #ifndef DISABLE_TLS 2992 FREEPTR(tls_opt.CAdir); 2993 FREEPTR(tls_opt.CAfile); 2994 FREEPTR(tls_opt.keyfile); 2995 FREEPTR(tls_opt.certfile); 2996 FREEPTR(tls_opt.x509verify); 2997 FREEPTR(tls_opt.bindhost); 2998 FREEPTR(tls_opt.bindport); 2999 FREEPTR(tls_opt.server); 3000 FREEPTR(tls_opt.gen_cert); 3001 free_cred_SLIST(&tls_opt.cert_head); 3002 free_cred_SLIST(&tls_opt.fprint_head); 3003 FREE_SSL_CTX(tls_opt.global_TLS_CTX); 3004 #endif /* !DISABLE_TLS */ 3005 3006 FREEPTR(funix); 3007 for (p = LogPaths; p && *p; p++) 3008 unlink(*p); 3009 exit(0); 3010 } 3011 3012 #ifndef DISABLE_SIGN 3013 /* 3014 * get one "sign_delim_sg2" item, convert and store in ordered queue 3015 */ 3016 void 3017 store_sign_delim_sg2(char *tmp_buf) 3018 { 3019 struct string_queue *sqentry, *sqe1, *sqe2; 3020 3021 if(!(sqentry = malloc(sizeof(*sqentry)))) { 3022 logerror("Unable to allocate memory"); 3023 return; 3024 } 3025 /*LINTED constcond/null effect */ 3026 assert(sizeof(int64_t) == sizeof(uint_fast64_t)); 3027 if (dehumanize_number(tmp_buf, (int64_t*) &(sqentry->key)) == -1 3028 || sqentry->key > (LOG_NFACILITIES<<3)) { 3029 DPRINTF(D_PARSE, "invalid sign_delim_sg2: %s\n", tmp_buf); 3030 free(sqentry); 3031 FREEPTR(tmp_buf); 3032 return; 3033 } 3034 sqentry->data = tmp_buf; 3035 3036 if (STAILQ_EMPTY(&GlobalSign.sig2_delims)) { 3037 STAILQ_INSERT_HEAD(&GlobalSign.sig2_delims, 3038 sqentry, entries); 3039 return; 3040 } 3041 3042 /* keep delimiters sorted */ 3043 sqe1 = sqe2 = STAILQ_FIRST(&GlobalSign.sig2_delims); 3044 if (sqe1->key > sqentry->key) { 3045 STAILQ_INSERT_HEAD(&GlobalSign.sig2_delims, 3046 sqentry, entries); 3047 return; 3048 } 3049 3050 while ((sqe1 = sqe2) 3051 && (sqe2 = STAILQ_NEXT(sqe1, entries))) { 3052 if (sqe2->key > sqentry->key) { 3053 break; 3054 } else if (sqe2->key == sqentry->key) { 3055 DPRINTF(D_PARSE, "duplicate sign_delim_sg2: %s\n", 3056 tmp_buf); 3057 FREEPTR(sqentry); 3058 FREEPTR(tmp_buf); 3059 return; 3060 } 3061 } 3062 STAILQ_INSERT_AFTER(&GlobalSign.sig2_delims, sqe1, sqentry, entries); 3063 } 3064 #endif /* !DISABLE_SIGN */ 3065 3066 /* 3067 * read syslog.conf 3068 */ 3069 void 3070 read_config_file(FILE *cf, struct filed **f_ptr) 3071 { 3072 size_t linenum = 0; 3073 size_t i; 3074 struct filed *f, **nextp; 3075 char cline[LINE_MAX]; 3076 char prog[NAME_MAX + 1]; 3077 char host[MAXHOSTNAMELEN]; 3078 const char *p; 3079 char *q; 3080 bool found_keyword; 3081 #ifndef DISABLE_TLS 3082 struct peer_cred *cred = NULL; 3083 struct peer_cred_head *credhead = NULL; 3084 #endif /* !DISABLE_TLS */ 3085 #ifndef DISABLE_SIGN 3086 char *sign_sg_str = NULL; 3087 #endif /* !DISABLE_SIGN */ 3088 #if (!defined(DISABLE_TLS) || !defined(DISABLE_SIGN)) 3089 char *tmp_buf = NULL; 3090 #endif /* (!defined(DISABLE_TLS) || !defined(DISABLE_SIGN)) */ 3091 /* central list of recognized configuration keywords 3092 * and an address for their values as strings */ 3093 const struct config_keywords { 3094 const char *keyword; 3095 char **variable; 3096 } config_keywords[] = { 3097 #ifndef DISABLE_TLS 3098 /* TLS settings */ 3099 {"tls_ca", &tls_opt.CAfile}, 3100 {"tls_cadir", &tls_opt.CAdir}, 3101 {"tls_cert", &tls_opt.certfile}, 3102 {"tls_key", &tls_opt.keyfile}, 3103 {"tls_verify", &tls_opt.x509verify}, 3104 {"tls_bindport", &tls_opt.bindport}, 3105 {"tls_bindhost", &tls_opt.bindhost}, 3106 {"tls_server", &tls_opt.server}, 3107 {"tls_gen_cert", &tls_opt.gen_cert}, 3108 /* special cases in parsing */ 3109 {"tls_allow_fingerprints",&tmp_buf}, 3110 {"tls_allow_clientcerts", &tmp_buf}, 3111 /* buffer settings */ 3112 {"tls_queue_length", &TypeInfo[F_TLS].queue_length_string}, 3113 {"tls_queue_size", &TypeInfo[F_TLS].queue_size_string}, 3114 #endif /* !DISABLE_TLS */ 3115 {"file_queue_length", &TypeInfo[F_FILE].queue_length_string}, 3116 {"pipe_queue_length", &TypeInfo[F_PIPE].queue_length_string}, 3117 {"fifo_queue_length", &TypeInfo[F_FIFO].queue_length_string}, 3118 {"file_queue_size", &TypeInfo[F_FILE].queue_size_string}, 3119 {"pipe_queue_size", &TypeInfo[F_PIPE].queue_size_string}, 3120 {"fifo_queue_size", &TypeInfo[F_FIFO].queue_size_string}, 3121 #ifndef DISABLE_SIGN 3122 /* syslog-sign setting */ 3123 {"sign_sg", &sign_sg_str}, 3124 /* also special case in parsing */ 3125 {"sign_delim_sg2", &tmp_buf}, 3126 #endif /* !DISABLE_SIGN */ 3127 }; 3128 3129 DPRINTF(D_CALL, "read_config_file()\n"); 3130 3131 /* free all previous config options */ 3132 for (i = 0; i < A_CNT(TypeInfo); i++) { 3133 if (TypeInfo[i].queue_length_string 3134 && TypeInfo[i].queue_length_string 3135 != TypeInfo[i].default_length_string) { 3136 FREEPTR(TypeInfo[i].queue_length_string); 3137 TypeInfo[i].queue_length_string = 3138 strdup(TypeInfo[i].default_length_string); 3139 } 3140 if (TypeInfo[i].queue_size_string 3141 && TypeInfo[i].queue_size_string 3142 != TypeInfo[i].default_size_string) { 3143 FREEPTR(TypeInfo[i].queue_size_string); 3144 TypeInfo[i].queue_size_string = 3145 strdup(TypeInfo[i].default_size_string); 3146 } 3147 } 3148 for (i = 0; i < A_CNT(config_keywords); i++) 3149 FREEPTR(*config_keywords[i].variable); 3150 /* 3151 * global settings 3152 */ 3153 while (fgets(cline, sizeof(cline), cf) != NULL) { 3154 linenum++; 3155 for (p = cline; isspace((unsigned char)*p); ++p) 3156 continue; 3157 if ((*p == '\0') || (*p == '#')) 3158 continue; 3159 3160 for (i = 0; i < A_CNT(config_keywords); i++) { 3161 if (copy_config_value(config_keywords[i].keyword, 3162 config_keywords[i].variable, &p, ConfFile, 3163 linenum)) { 3164 DPRINTF((D_PARSE|D_MEM), 3165 "found option %s, saved @%p\n", 3166 config_keywords[i].keyword, 3167 *config_keywords[i].variable); 3168 #ifndef DISABLE_SIGN 3169 if (!strcmp("sign_delim_sg2", 3170 config_keywords[i].keyword)) 3171 do { 3172 store_sign_delim_sg2(tmp_buf); 3173 } while (copy_config_value_word( 3174 &tmp_buf, &p)); 3175 3176 #endif /* !DISABLE_SIGN */ 3177 3178 #ifndef DISABLE_TLS 3179 /* special cases with multiple parameters */ 3180 if (!strcmp("tls_allow_fingerprints", 3181 config_keywords[i].keyword)) 3182 credhead = &tls_opt.fprint_head; 3183 else if (!strcmp("tls_allow_clientcerts", 3184 config_keywords[i].keyword)) 3185 credhead = &tls_opt.cert_head; 3186 3187 if (credhead) do { 3188 if(!(cred = malloc(sizeof(*cred)))) { 3189 logerror("Unable to " 3190 "allocate memory"); 3191 break; 3192 } 3193 cred->data = tmp_buf; 3194 tmp_buf = NULL; 3195 SLIST_INSERT_HEAD(credhead, 3196 cred, entries); 3197 } while /* additional values? */ 3198 (copy_config_value_word(&tmp_buf, &p)); 3199 credhead = NULL; 3200 break; 3201 #endif /* !DISABLE_TLS */ 3202 } 3203 } 3204 } 3205 /* convert strings to integer values */ 3206 for (i = 0; i < A_CNT(TypeInfo); i++) { 3207 if (!TypeInfo[i].queue_length_string 3208 || dehumanize_number(TypeInfo[i].queue_length_string, 3209 &TypeInfo[i].queue_length) == -1) 3210 if (dehumanize_number(TypeInfo[i].default_length_string, 3211 &TypeInfo[i].queue_length) == -1) 3212 abort(); 3213 if (!TypeInfo[i].queue_size_string 3214 || dehumanize_number(TypeInfo[i].queue_size_string, 3215 &TypeInfo[i].queue_size) == -1) 3216 if (dehumanize_number(TypeInfo[i].default_size_string, 3217 &TypeInfo[i].queue_size) == -1) 3218 abort(); 3219 } 3220 3221 #ifndef DISABLE_SIGN 3222 if (sign_sg_str) { 3223 if (sign_sg_str[1] == '\0' 3224 && (sign_sg_str[0] == '0' || sign_sg_str[0] == '1' 3225 || sign_sg_str[0] == '2' || sign_sg_str[0] == '3')) 3226 GlobalSign.sg = sign_sg_str[0] - '0'; 3227 else { 3228 GlobalSign.sg = SIGN_SG; 3229 DPRINTF(D_MISC, "Invalid sign_sg value `%s', " 3230 "use default value `%d'\n", 3231 sign_sg_str, GlobalSign.sg); 3232 } 3233 } else /* disable syslog-sign */ 3234 GlobalSign.sg = -1; 3235 #endif /* !DISABLE_SIGN */ 3236 3237 rewind(cf); 3238 linenum = 0; 3239 /* 3240 * Foreach line in the conf table, open that file. 3241 */ 3242 f = NULL; 3243 nextp = &f; 3244 3245 strcpy(prog, "*"); 3246 strcpy(host, "*"); 3247 while (fgets(cline, sizeof(cline), cf) != NULL) { 3248 linenum++; 3249 found_keyword = false; 3250 /* 3251 * check for end-of-section, comments, strip off trailing 3252 * spaces and newline character. #!prog is treated specially: 3253 * following lines apply only to that program. 3254 */ 3255 for (p = cline; isspace((unsigned char)*p); ++p) 3256 continue; 3257 if (*p == '\0') 3258 continue; 3259 if (*p == '#') { 3260 p++; 3261 if (*p != '!' && *p != '+' && *p != '-') 3262 continue; 3263 } 3264 3265 for (i = 0; i < A_CNT(config_keywords); i++) { 3266 if (!strncasecmp(p, config_keywords[i].keyword, 3267 strlen(config_keywords[i].keyword))) { 3268 DPRINTF(D_PARSE, 3269 "skip cline %zu with keyword %s\n", 3270 linenum, config_keywords[i].keyword); 3271 found_keyword = true; 3272 } 3273 } 3274 if (found_keyword) 3275 continue; 3276 3277 if (*p == '+' || *p == '-') { 3278 host[0] = *p++; 3279 while (isspace((unsigned char)*p)) 3280 p++; 3281 if (*p == '\0' || *p == '*') { 3282 strcpy(host, "*"); 3283 continue; 3284 } 3285 /* the +hostname expression will continue 3286 * to use the LocalHostName, not the FQDN */ 3287 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) { 3288 if (*p == '@') { 3289 (void)strncpy(&host[i], LocalHostName, 3290 sizeof(host) - 1 - i); 3291 host[sizeof(host) - 1] = '\0'; 3292 i = strlen(host) - 1; 3293 p++; 3294 continue; 3295 } 3296 if (!isalnum((unsigned char)*p) && 3297 *p != '.' && *p != '-' && *p != ',') 3298 break; 3299 host[i] = *p++; 3300 } 3301 host[i] = '\0'; 3302 continue; 3303 } 3304 if (*p == '!') { 3305 p++; 3306 while (isspace((unsigned char)*p)) 3307 p++; 3308 if (*p == '\0' || *p == '*') { 3309 strcpy(prog, "*"); 3310 continue; 3311 } 3312 for (i = 0; i < NAME_MAX; i++) { 3313 if (!isprint((unsigned char)p[i])) 3314 break; 3315 prog[i] = p[i]; 3316 } 3317 prog[i] = '\0'; 3318 continue; 3319 } 3320 for (q = strchr(cline, '\0'); isspace((unsigned char)*--q);) 3321 continue; 3322 *++q = '\0'; 3323 if ((f = calloc(1, sizeof(*f))) == NULL) { 3324 logerror("alloc failed"); 3325 die(0, 0, NULL); 3326 } 3327 if (!*f_ptr) *f_ptr = f; /* return first node */ 3328 *nextp = f; 3329 nextp = &f->f_next; 3330 cfline(linenum, cline, f, prog, host); 3331 } 3332 } 3333 3334 /* 3335 * INIT -- Initialize syslogd from configuration table 3336 */ 3337 void 3338 /*ARGSUSED*/ 3339 init(int fd, short event, void *ev) 3340 { 3341 FILE *cf; 3342 int i; 3343 struct filed *f, *newf, **nextp, *f2; 3344 char *p; 3345 sigset_t newmask, omask; 3346 #ifndef DISABLE_TLS 3347 char *tls_status_msg = NULL; 3348 struct peer_cred *cred = NULL; 3349 #endif /* !DISABLE_TLS */ 3350 3351 /* prevent recursive signals */ 3352 BLOCK_SIGNALS(omask, newmask); 3353 3354 DPRINTF((D_EVENT|D_CALL), "init\n"); 3355 3356 /* 3357 * be careful about dependencies and order of actions: 3358 * 1. flush buffer queues 3359 * 2. flush -sign SBs 3360 * 3. flush/delete buffer queue again, in case an SB got there 3361 * 4. close files/connections 3362 */ 3363 3364 /* 3365 * flush any pending output 3366 */ 3367 for (f = Files; f != NULL; f = f->f_next) { 3368 /* flush any pending output */ 3369 if (f->f_prevcount) 3370 fprintlog(f, NULL, NULL); 3371 SEND_QUEUE(f); 3372 } 3373 /* some actions only on SIGHUP and not on first start */ 3374 if (Initialized) { 3375 #ifndef DISABLE_SIGN 3376 sign_global_free(); 3377 #endif /* !DISABLE_SIGN */ 3378 #ifndef DISABLE_TLS 3379 free_incoming_tls_sockets(); 3380 #endif /* !DISABLE_TLS */ 3381 Initialized = 0; 3382 } 3383 /* 3384 * Close all open log files. 3385 */ 3386 for (f = Files; f != NULL; f = f->f_next) { 3387 switch (f->f_type) { 3388 case F_FILE: 3389 case F_TTY: 3390 case F_CONSOLE: 3391 (void)close(f->f_file); 3392 break; 3393 case F_PIPE: 3394 if (f->f_un.f_pipe.f_pid > 0) { 3395 (void)close(f->f_file); 3396 deadq_enter(f->f_un.f_pipe.f_pid, 3397 f->f_un.f_pipe.f_pname); 3398 } 3399 f->f_un.f_pipe.f_pid = 0; 3400 break; 3401 case F_FORW: 3402 if (f->f_un.f_forw.f_addr) 3403 freeaddrinfo(f->f_un.f_forw.f_addr); 3404 break; 3405 #ifndef DISABLE_TLS 3406 case F_TLS: 3407 free_tls_sslptr(f->f_un.f_tls.tls_conn); 3408 break; 3409 #endif /* !DISABLE_TLS */ 3410 } 3411 } 3412 3413 /* 3414 * Close all open UDP sockets 3415 */ 3416 if (finet) { 3417 for (i = 0; i < finet->fd; i++) { 3418 if (close(finet[i+1].fd) < 0) { 3419 logerror("close() failed"); 3420 die(0, 0, NULL); 3421 } 3422 DEL_EVENT(finet[i+1].ev); 3423 FREEPTR(finet[i+1].ev); 3424 } 3425 FREEPTR(finet); 3426 } 3427 3428 /* get FQDN and hostname/domain */ 3429 FREEPTR(oldLocalFQDN); 3430 oldLocalFQDN = LocalFQDN; 3431 LocalFQDN = getLocalFQDN(); 3432 if ((p = strchr(LocalFQDN, '.')) != NULL) 3433 (void)strlcpy(LocalHostName, LocalFQDN, 1+p-LocalFQDN); 3434 else 3435 (void)strlcpy(LocalHostName, LocalFQDN, sizeof(LocalHostName)); 3436 3437 /* 3438 * Reset counter of forwarding actions 3439 */ 3440 3441 NumForwards=0; 3442 3443 /* new destination list to replace Files */ 3444 newf = NULL; 3445 nextp = &newf; 3446 3447 /* open the configuration file */ 3448 if ((cf = fopen(ConfFile, "r")) == NULL) { 3449 DPRINTF(D_FILE, "Cannot open `%s'\n", ConfFile); 3450 *nextp = (struct filed *)calloc(1, sizeof(*f)); 3451 cfline(0, "*.ERR\t/dev/console", *nextp, "*", "*"); 3452 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f)); 3453 cfline(0, "*.PANIC\t*", (*nextp)->f_next, "*", "*"); 3454 Initialized = 1; 3455 RESTORE_SIGNALS(omask); 3456 return; 3457 } 3458 3459 #ifndef DISABLE_TLS 3460 /* init with new TLS_CTX 3461 * as far as I see one cannot change the cert/key of an existing CTX 3462 */ 3463 FREE_SSL_CTX(tls_opt.global_TLS_CTX); 3464 3465 free_cred_SLIST(&tls_opt.cert_head); 3466 free_cred_SLIST(&tls_opt.fprint_head); 3467 #endif /* !DISABLE_TLS */ 3468 3469 /* read and close configuration file */ 3470 read_config_file(cf, &newf); 3471 newf = *nextp; 3472 (void)fclose(cf); 3473 DPRINTF(D_MISC, "read_config_file() returned newf=%p\n", newf); 3474 3475 #define MOVE_QUEUE(dst, src) do { \ 3476 struct buf_queue *buf; \ 3477 STAILQ_CONCAT(&dst->f_qhead, &src->f_qhead); \ 3478 STAILQ_FOREACH(buf, &dst->f_qhead, entries) { \ 3479 dst->f_qelements++; \ 3480 dst->f_qsize += buf_queue_obj_size(buf); \ 3481 } \ 3482 src->f_qsize = 0; \ 3483 src->f_qelements = 0; \ 3484 } while (/*CONSTCOND*/0) 3485 3486 /* 3487 * Free old log files. 3488 */ 3489 for (f = Files; f != NULL;) { 3490 struct filed *ftmp; 3491 3492 /* check if a new logfile is equal, if so pass the queue */ 3493 for (f2 = newf; f2 != NULL; f2 = f2->f_next) { 3494 if (f->f_type == f2->f_type 3495 && ((f->f_type == F_PIPE 3496 && !strcmp(f->f_un.f_pipe.f_pname, 3497 f2->f_un.f_pipe.f_pname)) 3498 #ifndef DISABLE_TLS 3499 || (f->f_type == F_TLS 3500 && !strcmp(f->f_un.f_tls.tls_conn->hostname, 3501 f2->f_un.f_tls.tls_conn->hostname) 3502 && !strcmp(f->f_un.f_tls.tls_conn->port, 3503 f2->f_un.f_tls.tls_conn->port)) 3504 #endif /* !DISABLE_TLS */ 3505 || (f->f_type == F_FORW 3506 && !strcmp(f->f_un.f_forw.f_hname, 3507 f2->f_un.f_forw.f_hname)))) { 3508 DPRINTF(D_BUFFER, "move queue from f@%p " 3509 "to f2@%p\n", f, f2); 3510 MOVE_QUEUE(f2, f); 3511 } 3512 } 3513 message_queue_freeall(f); 3514 DELREF(f->f_prevmsg); 3515 #ifndef DISABLE_TLS 3516 if (f->f_type == F_TLS) 3517 free_tls_conn(f->f_un.f_tls.tls_conn); 3518 #endif /* !DISABLE_TLS */ 3519 FREEPTR(f->f_program); 3520 FREEPTR(f->f_host); 3521 DEL_EVENT(f->f_sq_event); 3522 3523 ftmp = f->f_next; 3524 free((char *)f); 3525 f = ftmp; 3526 } 3527 Files = newf; 3528 Initialized = 1; 3529 3530 if (Debug) { 3531 for (f = Files; f; f = f->f_next) { 3532 for (i = 0; i <= LOG_NFACILITIES; i++) 3533 if (f->f_pmask[i] == INTERNAL_NOPRI) 3534 printf("X "); 3535 else 3536 printf("%d ", f->f_pmask[i]); 3537 printf("%s: ", TypeInfo[f->f_type].name); 3538 switch (f->f_type) { 3539 case F_FILE: 3540 case F_TTY: 3541 case F_CONSOLE: 3542 case F_FIFO: 3543 printf("%s", f->f_un.f_fname); 3544 break; 3545 3546 case F_FORW: 3547 printf("%s", f->f_un.f_forw.f_hname); 3548 break; 3549 #ifndef DISABLE_TLS 3550 case F_TLS: 3551 printf("[%s]", f->f_un.f_tls.tls_conn->hostname); 3552 break; 3553 #endif /* !DISABLE_TLS */ 3554 case F_PIPE: 3555 printf("%s", f->f_un.f_pipe.f_pname); 3556 break; 3557 3558 case F_USERS: 3559 for (i = 0; 3560 i < MAXUNAMES && *f->f_un.f_uname[i]; i++) 3561 printf("%s, ", f->f_un.f_uname[i]); 3562 break; 3563 } 3564 if (f->f_program != NULL) 3565 printf(" (%s)", f->f_program); 3566 printf("\n"); 3567 } 3568 } 3569 3570 finet = socksetup(PF_UNSPEC, bindhostname); 3571 if (finet) { 3572 if (SecureMode) { 3573 for (i = 0; i < finet->fd; i++) { 3574 if (shutdown(finet[i+1].fd, SHUT_RD) < 0) { 3575 logerror("shutdown() failed"); 3576 die(0, 0, NULL); 3577 } 3578 } 3579 } else 3580 DPRINTF(D_NET, "Listening on inet and/or inet6 socket\n"); 3581 DPRINTF(D_NET, "Sending on inet and/or inet6 socket\n"); 3582 } 3583 3584 #ifndef DISABLE_TLS 3585 /* TLS setup -- after all local destinations opened */ 3586 DPRINTF(D_PARSE, "Parsed options: tls_ca: %s, tls_cadir: %s, " 3587 "tls_cert: %s, tls_key: %s, tls_verify: %s, " 3588 "bind: %s:%s, max. queue_lengths: %" 3589 PRId64 ", %" PRId64 ", %" PRId64 ", " 3590 "max. queue_sizes: %" 3591 PRId64 ", %" PRId64 ", %" PRId64 "\n", 3592 tls_opt.CAfile, tls_opt.CAdir, 3593 tls_opt.certfile, tls_opt.keyfile, tls_opt.x509verify, 3594 tls_opt.bindhost, tls_opt.bindport, 3595 TypeInfo[F_TLS].queue_length, TypeInfo[F_FILE].queue_length, 3596 TypeInfo[F_PIPE].queue_length, 3597 TypeInfo[F_TLS].queue_size, TypeInfo[F_FILE].queue_size, 3598 TypeInfo[F_PIPE].queue_size); 3599 SLIST_FOREACH(cred, &tls_opt.cert_head, entries) { 3600 DPRINTF(D_PARSE, "Accepting peer certificate " 3601 "from file: \"%s\"\n", cred->data); 3602 } 3603 SLIST_FOREACH(cred, &tls_opt.fprint_head, entries) { 3604 DPRINTF(D_PARSE, "Accepting peer certificate with " 3605 "fingerprint: \"%s\"\n", cred->data); 3606 } 3607 3608 /* Note: The order of initialization is important because syslog-sign 3609 * should use the TLS cert for signing. -- So we check first if TLS 3610 * will be used and initialize it before starting -sign. 3611 * 3612 * This means that if we are a client without TLS destinations TLS 3613 * will not be initialized and syslog-sign will generate a new key. 3614 * -- Even if the user has set a usable tls_cert. 3615 * Is this the expected behaviour? The alternative would be to always 3616 * initialize the TLS structures, even if they will not be needed 3617 * (or only needed to read the DSA key for -sign). 3618 */ 3619 3620 /* Initialize TLS only if used */ 3621 if (tls_opt.server) 3622 tls_status_msg = init_global_TLS_CTX(); 3623 else 3624 for (f = Files; f; f = f->f_next) { 3625 if (f->f_type != F_TLS) 3626 continue; 3627 tls_status_msg = init_global_TLS_CTX(); 3628 break; 3629 } 3630 3631 #endif /* !DISABLE_TLS */ 3632 3633 #ifndef DISABLE_SIGN 3634 /* only initialize -sign if actually used */ 3635 if (GlobalSign.sg == 0 || GlobalSign.sg == 1 || GlobalSign.sg == 2) 3636 (void)sign_global_init(Files); 3637 else if (GlobalSign.sg == 3) 3638 for (f = Files; f; f = f->f_next) 3639 if (f->f_flags & FFLAG_SIGN) { 3640 (void)sign_global_init(Files); 3641 break; 3642 } 3643 #endif /* !DISABLE_SIGN */ 3644 3645 #ifndef DISABLE_TLS 3646 if (tls_status_msg) { 3647 loginfo("%s", tls_status_msg); 3648 free(tls_status_msg); 3649 } 3650 DPRINTF((D_NET|D_TLS), "Preparing sockets for TLS\n"); 3651 TLS_Listen_Set = 3652 socksetup_tls(PF_UNSPEC, tls_opt.bindhost, tls_opt.bindport); 3653 3654 for (f = Files; f; f = f->f_next) { 3655 if (f->f_type != F_TLS) 3656 continue; 3657 if (!tls_connect(f->f_un.f_tls.tls_conn)) { 3658 logerror("Unable to connect to TLS server %s", 3659 f->f_un.f_tls.tls_conn->hostname); 3660 /* Reconnect after x seconds */ 3661 schedule_event(&f->f_un.f_tls.tls_conn->event, 3662 &((struct timeval){TLS_RECONNECT_SEC, 0}), 3663 tls_reconnect, f->f_un.f_tls.tls_conn); 3664 } 3665 } 3666 #endif /* !DISABLE_TLS */ 3667 3668 loginfo("restart"); 3669 /* 3670 * Log a change in hostname, but only on a restart (we detect this 3671 * by checking to see if we're passed a kevent). 3672 */ 3673 if (oldLocalFQDN && strcmp(oldLocalFQDN, LocalFQDN) != 0) 3674 loginfo("host name changed, \"%s\" to \"%s\"", 3675 oldLocalFQDN, LocalFQDN); 3676 3677 RESTORE_SIGNALS(omask); 3678 } 3679 3680 /* 3681 * Crack a configuration file line 3682 */ 3683 void 3684 cfline(size_t linenum, const char *line, struct filed *f, const char *prog, 3685 const char *host) 3686 { 3687 struct addrinfo hints, *res; 3688 int error, i, pri, syncfile; 3689 const char *p, *q; 3690 char *bp; 3691 char buf[MAXLINE]; 3692 struct stat sb; 3693 3694 DPRINTF((D_CALL|D_PARSE), 3695 "cfline(%zu, \"%s\", f, \"%s\", \"%s\")\n", 3696 linenum, line, prog, host); 3697 3698 errno = 0; /* keep strerror() stuff out of logerror messages */ 3699 3700 /* clear out file entry */ 3701 memset(f, 0, sizeof(*f)); 3702 for (i = 0; i <= LOG_NFACILITIES; i++) 3703 f->f_pmask[i] = INTERNAL_NOPRI; 3704 STAILQ_INIT(&f->f_qhead); 3705 3706 /* 3707 * There should not be any space before the log facility. 3708 * Check this is okay, complain and fix if it is not. 3709 */ 3710 q = line; 3711 if (isblank((unsigned char)*line)) { 3712 errno = 0; 3713 logerror("Warning: `%s' space or tab before the log facility", 3714 line); 3715 /* Fix: strip all spaces/tabs before the log facility */ 3716 while (*q++ && isblank((unsigned char)*q)) 3717 /* skip blanks */; 3718 line = q; 3719 } 3720 3721 /* 3722 * q is now at the first char of the log facility 3723 * There should be at least one tab after the log facility 3724 * Check this is okay, and complain and fix if it is not. 3725 */ 3726 q = line + strlen(line); 3727 while (!isblank((unsigned char)*q) && (q != line)) 3728 q--; 3729 if ((q == line) && strlen(line)) { 3730 /* No tabs or space in a non empty line: complain */ 3731 errno = 0; 3732 logerror( 3733 "Error: `%s' log facility or log target missing", 3734 line); 3735 return; 3736 } 3737 3738 /* save host name, if any */ 3739 if (*host == '*') 3740 f->f_host = NULL; 3741 else { 3742 f->f_host = strdup(host); 3743 trim_anydomain(f->f_host); 3744 } 3745 3746 /* save program name, if any */ 3747 if (*prog == '*') 3748 f->f_program = NULL; 3749 else 3750 f->f_program = strdup(prog); 3751 3752 /* scan through the list of selectors */ 3753 for (p = line; *p && !isblank((unsigned char)*p);) { 3754 int pri_done, pri_cmp, pri_invert; 3755 3756 /* find the end of this facility name list */ 3757 for (q = p; *q && !isblank((unsigned char)*q) && *q++ != '.'; ) 3758 continue; 3759 3760 /* get the priority comparison */ 3761 pri_cmp = 0; 3762 pri_done = 0; 3763 pri_invert = 0; 3764 if (*q == '!') { 3765 pri_invert = 1; 3766 q++; 3767 } 3768 while (! pri_done) { 3769 switch (*q) { 3770 case '<': 3771 pri_cmp = PRI_LT; 3772 q++; 3773 break; 3774 case '=': 3775 pri_cmp = PRI_EQ; 3776 q++; 3777 break; 3778 case '>': 3779 pri_cmp = PRI_GT; 3780 q++; 3781 break; 3782 default: 3783 pri_done = 1; 3784 break; 3785 } 3786 } 3787 3788 /* collect priority name */ 3789 for (bp = buf; *q && !strchr("\t ,;", *q); ) 3790 *bp++ = *q++; 3791 *bp = '\0'; 3792 3793 /* skip cruft */ 3794 while (strchr(",;", *q)) 3795 q++; 3796 3797 /* decode priority name */ 3798 if (*buf == '*') { 3799 pri = LOG_PRIMASK + 1; 3800 pri_cmp = PRI_LT | PRI_EQ | PRI_GT; 3801 } else { 3802 pri = decode(buf, prioritynames); 3803 if (pri < 0) { 3804 errno = 0; 3805 logerror("Unknown priority name `%s'", buf); 3806 return; 3807 } 3808 } 3809 if (pri_cmp == 0) 3810 pri_cmp = UniquePriority ? PRI_EQ 3811 : PRI_EQ | PRI_GT; 3812 if (pri_invert) 3813 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT; 3814 3815 /* scan facilities */ 3816 while (*p && !strchr("\t .;", *p)) { 3817 for (bp = buf; *p && !strchr("\t ,;.", *p); ) 3818 *bp++ = *p++; 3819 *bp = '\0'; 3820 if (*buf == '*') 3821 for (i = 0; i < LOG_NFACILITIES; i++) { 3822 f->f_pmask[i] = pri; 3823 f->f_pcmp[i] = pri_cmp; 3824 } 3825 else { 3826 i = decode(buf, facilitynames); 3827 if (i < 0) { 3828 errno = 0; 3829 logerror("Unknown facility name `%s'", 3830 buf); 3831 return; 3832 } 3833 f->f_pmask[i >> 3] = pri; 3834 f->f_pcmp[i >> 3] = pri_cmp; 3835 } 3836 while (*p == ',' || *p == ' ') 3837 p++; 3838 } 3839 3840 p = q; 3841 } 3842 3843 /* skip to action part */ 3844 while (isblank((unsigned char)*p)) 3845 p++; 3846 3847 /* 3848 * should this be "#ifndef DISABLE_SIGN" or is it a general option? 3849 * '+' before file destination: write with PRI field for later 3850 * verification 3851 */ 3852 if (*p == '+') { 3853 f->f_flags |= FFLAG_FULL; 3854 p++; 3855 } 3856 if (*p == '-') { 3857 syncfile = 0; 3858 p++; 3859 } else 3860 syncfile = 1; 3861 3862 switch (*p) { 3863 case '@': 3864 #ifndef DISABLE_SIGN 3865 if (GlobalSign.sg == 3) 3866 f->f_flags |= FFLAG_SIGN; 3867 #endif /* !DISABLE_SIGN */ 3868 #ifndef DISABLE_TLS 3869 if (*(p+1) == '[') { 3870 /* TLS destination */ 3871 if (!parse_tls_destination(p, f, linenum)) { 3872 logerror("Unable to parse action %s", p); 3873 break; 3874 } 3875 f->f_type = F_TLS; 3876 break; 3877 } 3878 #endif /* !DISABLE_TLS */ 3879 (void)strlcpy(f->f_un.f_forw.f_hname, ++p, 3880 sizeof(f->f_un.f_forw.f_hname)); 3881 memset(&hints, 0, sizeof(hints)); 3882 hints.ai_family = AF_UNSPEC; 3883 hints.ai_socktype = SOCK_DGRAM; 3884 hints.ai_protocol = 0; 3885 error = getaddrinfo(f->f_un.f_forw.f_hname, "syslog", &hints, 3886 &res); 3887 if (error) { 3888 errno = 0; 3889 logerror("%s", gai_strerror(error)); 3890 break; 3891 } 3892 f->f_un.f_forw.f_addr = res; 3893 f->f_type = F_FORW; 3894 NumForwards++; 3895 break; 3896 3897 case '/': 3898 #ifndef DISABLE_SIGN 3899 if (GlobalSign.sg == 3) 3900 f->f_flags |= FFLAG_SIGN; 3901 #endif /* !DISABLE_SIGN */ 3902 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname)); 3903 if ((f->f_file = open(p, O_WRONLY|O_APPEND|O_NONBLOCK, 0)) < 0) 3904 { 3905 f->f_type = F_UNUSED; 3906 logerror("%s", p); 3907 break; 3908 } 3909 if (!fstat(f->f_file, &sb) && S_ISFIFO(sb.st_mode)) { 3910 f->f_file = -1; 3911 f->f_type = F_FIFO; 3912 break; 3913 } 3914 3915 if (isatty(f->f_file)) { 3916 f->f_type = F_TTY; 3917 if (strcmp(p, ctty) == 0) 3918 f->f_type = F_CONSOLE; 3919 } else 3920 f->f_type = F_FILE; 3921 3922 if (syncfile) 3923 f->f_flags |= FFLAG_SYNC; 3924 break; 3925 3926 case '|': 3927 #ifndef DISABLE_SIGN 3928 if (GlobalSign.sg == 3) 3929 f->f_flags |= FFLAG_SIGN; 3930 #endif 3931 f->f_un.f_pipe.f_pid = 0; 3932 (void) strlcpy(f->f_un.f_pipe.f_pname, p + 1, 3933 sizeof(f->f_un.f_pipe.f_pname)); 3934 f->f_type = F_PIPE; 3935 break; 3936 3937 case '*': 3938 f->f_type = F_WALL; 3939 break; 3940 3941 default: 3942 for (i = 0; i < MAXUNAMES && *p; i++) { 3943 for (q = p; *q && *q != ','; ) 3944 q++; 3945 (void)strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE); 3946 if ((q - p) > UT_NAMESIZE) 3947 f->f_un.f_uname[i][UT_NAMESIZE] = '\0'; 3948 else 3949 f->f_un.f_uname[i][q - p] = '\0'; 3950 while (*q == ',' || *q == ' ') 3951 q++; 3952 p = q; 3953 } 3954 f->f_type = F_USERS; 3955 break; 3956 } 3957 } 3958 3959 3960 /* 3961 * Decode a symbolic name to a numeric value 3962 */ 3963 int 3964 decode(const char *name, CODE *codetab) 3965 { 3966 CODE *c; 3967 char *p, buf[40]; 3968 3969 if (isdigit((unsigned char)*name)) 3970 return atoi(name); 3971 3972 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) { 3973 if (isupper((unsigned char)*name)) 3974 *p = tolower((unsigned char)*name); 3975 else 3976 *p = *name; 3977 } 3978 *p = '\0'; 3979 for (c = codetab; c->c_name; c++) 3980 if (!strcmp(buf, c->c_name)) 3981 return c->c_val; 3982 3983 return -1; 3984 } 3985 3986 /* 3987 * Retrieve the size of the kernel message buffer, via sysctl. 3988 */ 3989 int 3990 getmsgbufsize(void) 3991 { 3992 #ifdef __NetBSD_Version__ 3993 int msgbufsize, mib[2]; 3994 size_t size; 3995 3996 mib[0] = CTL_KERN; 3997 mib[1] = KERN_MSGBUFSIZE; 3998 size = sizeof msgbufsize; 3999 if (sysctl(mib, 2, &msgbufsize, &size, NULL, 0) == -1) { 4000 DPRINTF(D_MISC, "Couldn't get kern.msgbufsize\n"); 4001 return 0; 4002 } 4003 return msgbufsize; 4004 #else 4005 return MAXLINE; 4006 #endif /* __NetBSD_Version__ */ 4007 } 4008 4009 /* 4010 * Retrieve the hostname, via sysctl. 4011 */ 4012 char * 4013 getLocalFQDN(void) 4014 { 4015 int mib[2]; 4016 char *hostname; 4017 size_t len; 4018 4019 mib[0] = CTL_KERN; 4020 mib[1] = KERN_HOSTNAME; 4021 sysctl(mib, 2, NULL, &len, NULL, 0); 4022 4023 if (!(hostname = malloc(len))) { 4024 logerror("Unable to allocate memory"); 4025 die(0,0,NULL); 4026 } else if (sysctl(mib, 2, hostname, &len, NULL, 0) == -1) { 4027 DPRINTF(D_MISC, "Couldn't get kern.hostname\n"); 4028 (void)gethostname(hostname, sizeof(len)); 4029 } 4030 return hostname; 4031 } 4032 4033 struct socketEvent * 4034 socksetup(int af, const char *hostname) 4035 { 4036 struct addrinfo hints, *res, *r; 4037 int error, maxs; 4038 int on = 1; 4039 struct socketEvent *s, *socks; 4040 4041 if(SecureMode && !NumForwards) 4042 return NULL; 4043 4044 memset(&hints, 0, sizeof(hints)); 4045 hints.ai_flags = AI_PASSIVE; 4046 hints.ai_family = af; 4047 hints.ai_socktype = SOCK_DGRAM; 4048 error = getaddrinfo(hostname, "syslog", &hints, &res); 4049 if (error) { 4050 errno = 0; 4051 logerror("%s", gai_strerror(error)); 4052 die(0, 0, NULL); 4053 } 4054 4055 /* Count max number of sockets we may open */ 4056 for (maxs = 0, r = res; r; r = r->ai_next, maxs++) 4057 continue; 4058 socks = calloc(maxs+1, sizeof(*socks)); 4059 if (!socks) { 4060 logerror("Couldn't allocate memory for sockets"); 4061 die(0, 0, NULL); 4062 } 4063 4064 socks->fd = 0; /* num of sockets counter at start of array */ 4065 s = socks + 1; 4066 for (r = res; r; r = r->ai_next) { 4067 s->fd = socket(r->ai_family, r->ai_socktype, r->ai_protocol); 4068 if (s->fd < 0) { 4069 logerror("socket() failed"); 4070 continue; 4071 } 4072 s->af = r->ai_family; 4073 if (r->ai_family == AF_INET6 && setsockopt(s->fd, IPPROTO_IPV6, 4074 IPV6_V6ONLY, &on, sizeof(on)) < 0) { 4075 logerror("setsockopt(IPV6_V6ONLY) failed"); 4076 close(s->fd); 4077 continue; 4078 } 4079 4080 if (!SecureMode) { 4081 if (bind(s->fd, r->ai_addr, r->ai_addrlen) < 0) { 4082 logerror("bind() failed"); 4083 close(s->fd); 4084 continue; 4085 } 4086 s->ev = allocev(); 4087 event_set(s->ev, s->fd, EV_READ | EV_PERSIST, 4088 dispatch_read_finet, s->ev); 4089 if (event_add(s->ev, NULL) == -1) { 4090 DPRINTF((D_EVENT|D_NET), 4091 "Failure in event_add()\n"); 4092 } else { 4093 DPRINTF((D_EVENT|D_NET), 4094 "Listen on UDP port " 4095 "(event@%p)\n", s->ev); 4096 } 4097 } 4098 4099 socks->fd++; /* num counter */ 4100 s++; 4101 } 4102 4103 if (res) 4104 freeaddrinfo(res); 4105 if (socks->fd == 0) { 4106 free (socks); 4107 if(Debug) 4108 return NULL; 4109 else 4110 die(0, 0, NULL); 4111 } 4112 return socks; 4113 } 4114 4115 /* 4116 * Fairly similar to popen(3), but returns an open descriptor, as opposed 4117 * to a FILE *. 4118 */ 4119 int 4120 p_open(char *prog, pid_t *rpid) 4121 { 4122 static char sh[] = "sh", mc[] = "-c"; 4123 int pfd[2], nulldesc, i; 4124 pid_t pid; 4125 char *argv[4]; /* sh -c cmd NULL */ 4126 4127 if (pipe(pfd) == -1) 4128 return -1; 4129 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1) { 4130 /* We are royally screwed anyway. */ 4131 return -1; 4132 } 4133 4134 switch ((pid = fork())) { 4135 case -1: 4136 (void) close(nulldesc); 4137 return -1; 4138 4139 case 0: 4140 argv[0] = sh; 4141 argv[1] = mc; 4142 argv[2] = prog; 4143 argv[3] = NULL; 4144 4145 (void) setsid(); /* avoid catching SIGHUPs. */ 4146 4147 /* 4148 * Reset ignored signals to their default behavior. 4149 */ 4150 (void)signal(SIGTERM, SIG_DFL); 4151 (void)signal(SIGINT, SIG_DFL); 4152 (void)signal(SIGQUIT, SIG_DFL); 4153 (void)signal(SIGPIPE, SIG_DFL); 4154 (void)signal(SIGHUP, SIG_DFL); 4155 4156 dup2(pfd[0], STDIN_FILENO); 4157 dup2(nulldesc, STDOUT_FILENO); 4158 dup2(nulldesc, STDERR_FILENO); 4159 for (i = getdtablesize(); i > 2; i--) 4160 (void) close(i); 4161 4162 (void) execvp(_PATH_BSHELL, argv); 4163 _exit(255); 4164 } 4165 4166 (void) close(nulldesc); 4167 (void) close(pfd[0]); 4168 4169 /* 4170 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are 4171 * supposed to get an EWOULDBLOCK on writev(2), which is 4172 * caught by the logic above anyway, which will in turn 4173 * close the pipe, and fork a new logging subprocess if 4174 * necessary. The stale subprocess will be killed some 4175 * time later unless it terminated itself due to closing 4176 * its input pipe. 4177 */ 4178 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) { 4179 /* This is bad. */ 4180 logerror("Warning: cannot change pipe to pid %d to " 4181 "non-blocking.", (int) pid); 4182 } 4183 *rpid = pid; 4184 return pfd[1]; 4185 } 4186 4187 void 4188 deadq_enter(pid_t pid, const char *name) 4189 { 4190 dq_t p; 4191 int status; 4192 4193 /* 4194 * Be paranoid: if we can't signal the process, don't enter it 4195 * into the dead queue (perhaps it's already dead). If possible, 4196 * we try to fetch and log the child's status. 4197 */ 4198 if (kill(pid, 0) != 0) { 4199 if (waitpid(pid, &status, WNOHANG) > 0) 4200 log_deadchild(pid, status, name); 4201 return; 4202 } 4203 4204 p = malloc(sizeof(*p)); 4205 if (p == NULL) { 4206 logerror("panic: out of memory!"); 4207 exit(1); 4208 } 4209 4210 p->dq_pid = pid; 4211 p->dq_timeout = DQ_TIMO_INIT; 4212 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries); 4213 } 4214 4215 int 4216 deadq_remove(pid_t pid) 4217 { 4218 dq_t q; 4219 4220 for (q = TAILQ_FIRST(&deadq_head); q != NULL; 4221 q = TAILQ_NEXT(q, dq_entries)) { 4222 if (q->dq_pid == pid) { 4223 TAILQ_REMOVE(&deadq_head, q, dq_entries); 4224 free(q); 4225 return 1; 4226 } 4227 } 4228 return 0; 4229 } 4230 4231 void 4232 log_deadchild(pid_t pid, int status, const char *name) 4233 { 4234 int code; 4235 char buf[256]; 4236 const char *reason; 4237 4238 /* Keep strerror() struff out of logerror messages. */ 4239 errno = 0; 4240 if (WIFSIGNALED(status)) { 4241 reason = "due to signal"; 4242 code = WTERMSIG(status); 4243 } else { 4244 reason = "with status"; 4245 code = WEXITSTATUS(status); 4246 if (code == 0) 4247 return; 4248 } 4249 (void) snprintf(buf, sizeof(buf), 4250 "Logging subprocess %d (%s) exited %s %d.", 4251 pid, name, reason, code); 4252 logerror("%s", buf); 4253 } 4254 4255 struct event * 4256 allocev(void) 4257 { 4258 struct event *ev; 4259 4260 if (!(ev = calloc(1, sizeof(*ev)))) 4261 logerror("Unable to allocate memory"); 4262 return ev; 4263 } 4264 4265 /* *ev is allocated if necessary */ 4266 void 4267 schedule_event(struct event **ev, struct timeval *tv, 4268 void (*cb)(int, short, void *), void *arg) 4269 { 4270 if (!*ev && !(*ev = allocev())) { 4271 return; 4272 } 4273 event_set(*ev, 0, 0, cb, arg); 4274 DPRINTF(D_EVENT, "event_add(%s@%p)\n", "schedule_ev", *ev); \ 4275 if (event_add(*ev, tv) == -1) { 4276 DPRINTF(D_EVENT, "Failure in event_add()\n"); 4277 } 4278 } 4279 4280 #ifndef DISABLE_TLS 4281 /* abbreviation for freeing credential lists */ 4282 void 4283 free_cred_SLIST(struct peer_cred_head *head) 4284 { 4285 struct peer_cred *cred; 4286 4287 while (!SLIST_EMPTY(head)) { 4288 cred = SLIST_FIRST(head); 4289 SLIST_REMOVE_HEAD(head, entries); 4290 FREEPTR(cred->data); 4291 free(cred); 4292 } 4293 } 4294 #endif /* !DISABLE_TLS */ 4295 4296 /* 4297 * send message queue after reconnect 4298 */ 4299 /*ARGSUSED*/ 4300 void 4301 send_queue(int fd, short event, void *arg) 4302 { 4303 struct filed *f = (struct filed *) arg; 4304 struct buf_queue *qentry; 4305 #define SQ_CHUNK_SIZE 250 4306 size_t cnt = 0; 4307 4308 #ifndef DISABLE_TLS 4309 if (f->f_type == F_TLS) { 4310 /* use a flag to prevent recursive calls to send_queue() */ 4311 if (f->f_un.f_tls.tls_conn->send_queue) 4312 return; 4313 else 4314 f->f_un.f_tls.tls_conn->send_queue = true; 4315 } 4316 DPRINTF((D_DATA|D_CALL), "send_queue(f@%p with %zu msgs, " 4317 "cnt@%p = %zu)\n", f, f->f_qelements, &cnt, cnt); 4318 #endif /* !DISABLE_TLS */ 4319 4320 while ((qentry = STAILQ_FIRST(&f->f_qhead))) { 4321 #ifndef DISABLE_TLS 4322 /* send_queue() might be called with an unconnected destination 4323 * from init() or die() or one message might take longer, 4324 * leaving the connection in state ST_WAITING and thus not 4325 * ready for the next message. 4326 * this check is a shortcut to skip these unnecessary calls */ 4327 if (f->f_type == F_TLS 4328 && f->f_un.f_tls.tls_conn->state != ST_TLS_EST) { 4329 DPRINTF(D_TLS, "abort send_queue(cnt@%p = %zu) " 4330 "on TLS connection in state %d\n", 4331 &cnt, cnt, f->f_un.f_tls.tls_conn->state); 4332 return; 4333 } 4334 #endif /* !DISABLE_TLS */ 4335 fprintlog(f, qentry->msg, qentry); 4336 4337 /* Sending a long queue can take some time during which 4338 * SIGHUP and SIGALRM are blocked and no events are handled. 4339 * To avoid that we only send SQ_CHUNK_SIZE messages at once 4340 * and then reschedule ourselves to continue. Thus the control 4341 * will return first from all signal-protected functions so a 4342 * possible SIGHUP/SIGALRM is handled and then back to the 4343 * main loop which can handle possible input. 4344 */ 4345 if (++cnt >= SQ_CHUNK_SIZE) { 4346 if (!f->f_sq_event) { /* alloc on demand */ 4347 f->f_sq_event = allocev(); 4348 event_set(f->f_sq_event, 0, 0, send_queue, f); 4349 } 4350 if (event_add(f->f_sq_event, &((struct timeval){0, 1})) == -1) { 4351 DPRINTF(D_EVENT, "Failure in event_add()\n"); 4352 } 4353 break; 4354 } 4355 } 4356 #ifndef DISABLE_TLS 4357 if (f->f_type == F_TLS) 4358 f->f_un.f_tls.tls_conn->send_queue = false; 4359 #endif 4360 4361 } 4362 4363 /* 4364 * finds the next queue element to delete 4365 * 4366 * has stateful behaviour, before using it call once with reset = true 4367 * after that every call will return one next queue elemen to delete, 4368 * depending on strategy either the oldest or the one with the lowest priority 4369 */ 4370 static struct buf_queue * 4371 find_qentry_to_delete(const struct buf_queue_head *head, int strategy, 4372 bool reset) 4373 { 4374 static int pri; 4375 static struct buf_queue *qentry_static; 4376 4377 struct buf_queue *qentry_tmp; 4378 4379 if (reset || STAILQ_EMPTY(head)) { 4380 pri = LOG_DEBUG; 4381 qentry_static = STAILQ_FIRST(head); 4382 return NULL; 4383 } 4384 4385 /* find elements to delete */ 4386 if (strategy == PURGE_BY_PRIORITY) { 4387 qentry_tmp = qentry_static; 4388 if (!qentry_tmp) return NULL; 4389 while ((qentry_tmp = STAILQ_NEXT(qentry_tmp, entries)) != NULL) 4390 { 4391 if (LOG_PRI(qentry_tmp->msg->pri) == pri) { 4392 /* save the successor, because qentry_tmp 4393 * is probably deleted by the caller */ 4394 qentry_static = STAILQ_NEXT(qentry_tmp, entries); 4395 return qentry_tmp; 4396 } 4397 } 4398 /* nothing found in while loop --> next pri */ 4399 if (--pri) 4400 return find_qentry_to_delete(head, strategy, false); 4401 else 4402 return NULL; 4403 } else /* strategy == PURGE_OLDEST or other value */ { 4404 qentry_tmp = qentry_static; 4405 qentry_static = STAILQ_NEXT(qentry_tmp, entries); 4406 return qentry_tmp; /* is NULL on empty queue */ 4407 } 4408 } 4409 4410 /* note on TAILQ: newest message added at TAIL, 4411 * oldest to be removed is FIRST 4412 */ 4413 /* 4414 * checks length of a destination's message queue 4415 * if del_entries == 0 then assert queue length is 4416 * less or equal to configured number of queue elements 4417 * otherwise del_entries tells how many entries to delete 4418 * 4419 * returns the number of removed queue elements 4420 * (which not necessarily means free'd messages) 4421 * 4422 * strategy PURGE_OLDEST to delete oldest entry, e.g. after it was resent 4423 * strategy PURGE_BY_PRIORITY to delete messages with lowest priority first, 4424 * this is much slower but might be desirable when unsent messages have 4425 * to be deleted, e.g. in call from domark() 4426 */ 4427 size_t 4428 message_queue_purge(struct filed *f, size_t del_entries, int strategy) 4429 { 4430 size_t removed = 0; 4431 struct buf_queue *qentry = NULL; 4432 4433 DPRINTF((D_CALL|D_BUFFER), "purge_message_queue(%p, %zu, %d) with " 4434 "f_qelements=%zu and f_qsize=%zu\n", 4435 f, del_entries, strategy, 4436 f->f_qelements, f->f_qsize); 4437 4438 /* reset state */ 4439 (void)find_qentry_to_delete(&f->f_qhead, strategy, true); 4440 4441 while (removed < del_entries 4442 || (TypeInfo[f->f_type].queue_length != -1 4443 && (size_t)TypeInfo[f->f_type].queue_length <= f->f_qelements) 4444 || (TypeInfo[f->f_type].queue_size != -1 4445 && (size_t)TypeInfo[f->f_type].queue_size <= f->f_qsize)) { 4446 qentry = find_qentry_to_delete(&f->f_qhead, strategy, 0); 4447 if (message_queue_remove(f, qentry)) 4448 removed++; 4449 else 4450 break; 4451 } 4452 return removed; 4453 } 4454 4455 /* run message_queue_purge() for all destinations to free memory */ 4456 size_t 4457 message_allqueues_purge(void) 4458 { 4459 size_t sum = 0; 4460 struct filed *f; 4461 4462 for (f = Files; f; f = f->f_next) 4463 sum += message_queue_purge(f, 4464 f->f_qelements/10, PURGE_BY_PRIORITY); 4465 4466 DPRINTF(D_BUFFER, 4467 "message_allqueues_purge(): removed %zu buffer entries\n", sum); 4468 return sum; 4469 } 4470 4471 /* run message_queue_purge() for all destinations to check limits */ 4472 size_t 4473 message_allqueues_check(void) 4474 { 4475 size_t sum = 0; 4476 struct filed *f; 4477 4478 for (f = Files; f; f = f->f_next) 4479 sum += message_queue_purge(f, 0, PURGE_BY_PRIORITY); 4480 DPRINTF(D_BUFFER, 4481 "message_allqueues_check(): removed %zu buffer entries\n", sum); 4482 return sum; 4483 } 4484 4485 struct buf_msg * 4486 buf_msg_new(const size_t len) 4487 { 4488 struct buf_msg *newbuf; 4489 4490 CALLOC(newbuf, sizeof(*newbuf)); 4491 4492 if (len) { /* len = 0 is valid */ 4493 MALLOC(newbuf->msg, len); 4494 newbuf->msgorig = newbuf->msg; 4495 newbuf->msgsize = len; 4496 } 4497 return NEWREF(newbuf); 4498 } 4499 4500 void 4501 buf_msg_free(struct buf_msg *buf) 4502 { 4503 if (!buf) 4504 return; 4505 4506 buf->refcount--; 4507 if (buf->refcount == 0) { 4508 FREEPTR(buf->timestamp); 4509 /* small optimizations: the host/recvhost may point to the 4510 * global HostName/FQDN. of course this must not be free()d 4511 * same goes for appname and include_pid 4512 */ 4513 if (buf->recvhost != buf->host 4514 && buf->recvhost != LocalHostName 4515 && buf->recvhost != LocalFQDN 4516 && buf->recvhost != oldLocalFQDN) 4517 FREEPTR(buf->recvhost); 4518 if (buf->host != LocalHostName 4519 && buf->host != LocalFQDN 4520 && buf->host != oldLocalFQDN) 4521 FREEPTR(buf->host); 4522 if (buf->prog != appname) 4523 FREEPTR(buf->prog); 4524 if (buf->pid != include_pid) 4525 FREEPTR(buf->pid); 4526 FREEPTR(buf->msgid); 4527 FREEPTR(buf->sd); 4528 FREEPTR(buf->msgorig); /* instead of msg */ 4529 FREEPTR(buf); 4530 } 4531 } 4532 4533 size_t 4534 buf_queue_obj_size(struct buf_queue *qentry) 4535 { 4536 size_t sum = 0; 4537 4538 if (!qentry) 4539 return 0; 4540 sum += sizeof(*qentry) 4541 + sizeof(*qentry->msg) 4542 + qentry->msg->msgsize 4543 + SAFEstrlen(qentry->msg->timestamp)+1 4544 + SAFEstrlen(qentry->msg->msgid)+1; 4545 if (qentry->msg->prog 4546 && qentry->msg->prog != include_pid) 4547 sum += strlen(qentry->msg->prog)+1; 4548 if (qentry->msg->pid 4549 && qentry->msg->pid != appname) 4550 sum += strlen(qentry->msg->pid)+1; 4551 if (qentry->msg->recvhost 4552 && qentry->msg->recvhost != LocalHostName 4553 && qentry->msg->recvhost != LocalFQDN 4554 && qentry->msg->recvhost != oldLocalFQDN) 4555 sum += strlen(qentry->msg->recvhost)+1; 4556 if (qentry->msg->host 4557 && qentry->msg->host != LocalHostName 4558 && qentry->msg->host != LocalFQDN 4559 && qentry->msg->host != oldLocalFQDN) 4560 sum += strlen(qentry->msg->host)+1; 4561 4562 return sum; 4563 } 4564 4565 bool 4566 message_queue_remove(struct filed *f, struct buf_queue *qentry) 4567 { 4568 if (!f || !qentry || !qentry->msg) 4569 return false; 4570 4571 assert(!STAILQ_EMPTY(&f->f_qhead)); 4572 STAILQ_REMOVE(&f->f_qhead, qentry, buf_queue, entries); 4573 f->f_qelements--; 4574 f->f_qsize -= buf_queue_obj_size(qentry); 4575 4576 DPRINTF(D_BUFFER, "msg @%p removed from queue @%p, new qlen = %zu\n", 4577 qentry->msg, f, f->f_qelements); 4578 DELREF(qentry->msg); 4579 FREEPTR(qentry); 4580 return true; 4581 } 4582 4583 /* 4584 * returns *qentry on success and NULL on error 4585 */ 4586 struct buf_queue * 4587 message_queue_add(struct filed *f, struct buf_msg *buffer) 4588 { 4589 struct buf_queue *qentry; 4590 4591 /* check on every call or only every n-th time? */ 4592 message_queue_purge(f, 0, PURGE_BY_PRIORITY); 4593 4594 while (!(qentry = malloc(sizeof(*qentry))) 4595 && message_queue_purge(f, 1, PURGE_OLDEST)) 4596 continue; 4597 if (!qentry) { 4598 logerror("Unable to allocate memory"); 4599 DPRINTF(D_BUFFER, "queue empty, no memory, msg dropped\n"); 4600 return NULL; 4601 } else { 4602 qentry->msg = buffer; 4603 f->f_qelements++; 4604 f->f_qsize += buf_queue_obj_size(qentry); 4605 STAILQ_INSERT_TAIL(&f->f_qhead, qentry, entries); 4606 4607 DPRINTF(D_BUFFER, "msg @%p queued @%p, qlen = %zu\n", 4608 buffer, f, f->f_qelements); 4609 return qentry; 4610 } 4611 } 4612 4613 void 4614 message_queue_freeall(struct filed *f) 4615 { 4616 struct buf_queue *qentry; 4617 4618 if (!f) return; 4619 DPRINTF(D_MEM, "message_queue_freeall(f@%p) with f_qhead@%p\n", f, 4620 &f->f_qhead); 4621 4622 while (!STAILQ_EMPTY(&f->f_qhead)) { 4623 qentry = STAILQ_FIRST(&f->f_qhead); 4624 STAILQ_REMOVE(&f->f_qhead, qentry, buf_queue, entries); 4625 DELREF(qentry->msg); 4626 FREEPTR(qentry); 4627 } 4628 4629 f->f_qelements = 0; 4630 f->f_qsize = 0; 4631 } 4632 4633 #ifndef DISABLE_TLS 4634 /* utility function for tls_reconnect() */ 4635 struct filed * 4636 get_f_by_conninfo(struct tls_conn_settings *conn_info) 4637 { 4638 struct filed *f; 4639 4640 for (f = Files; f; f = f->f_next) { 4641 if ((f->f_type == F_TLS) && f->f_un.f_tls.tls_conn == conn_info) 4642 return f; 4643 } 4644 DPRINTF(D_TLS, "get_f_by_conninfo() called on invalid conn_info\n"); 4645 return NULL; 4646 } 4647 4648 /* 4649 * Called on signal. 4650 * Lets the admin reconnect without waiting for the reconnect timer expires. 4651 */ 4652 /*ARGSUSED*/ 4653 void 4654 dispatch_force_tls_reconnect(int fd, short event, void *ev) 4655 { 4656 struct filed *f; 4657 DPRINTF((D_TLS|D_CALL|D_EVENT), "dispatch_force_tls_reconnect()\n"); 4658 for (f = Files; f; f = f->f_next) { 4659 if (f->f_type == F_TLS && 4660 f->f_un.f_tls.tls_conn->state == ST_NONE) 4661 tls_reconnect(fd, event, f->f_un.f_tls.tls_conn); 4662 } 4663 } 4664 #endif /* !DISABLE_TLS */ 4665 4666 /* 4667 * return a timestamp in a static buffer, 4668 * either format the timestamp given by parameter in_now 4669 * or use the current time if in_now is NULL. 4670 */ 4671 char * 4672 make_timestamp(time_t *in_now, bool iso) 4673 { 4674 int frac_digits = 6; 4675 struct timeval tv; 4676 time_t mytime; 4677 struct tm ltime; 4678 int len = 0; 4679 int tzlen = 0; 4680 /* uses global var: time_t now; */ 4681 4682 if (in_now) { 4683 mytime = *in_now; 4684 } else { 4685 gettimeofday(&tv, NULL); 4686 mytime = now = (time_t) tv.tv_sec; 4687 } 4688 4689 if (!iso) { 4690 strlcpy(timestamp, ctime(&mytime) + 4, TIMESTAMPBUFSIZE); 4691 timestamp[BSD_TIMESTAMPLEN] = '\0'; 4692 return timestamp; 4693 } 4694 4695 localtime_r(&mytime, <ime); 4696 len += strftime(timestamp, TIMESTAMPBUFSIZE, "%FT%T", <ime); 4697 snprintf(&(timestamp[len]), frac_digits+2, ".%.*ld", 4698 frac_digits, (long)tv.tv_usec); 4699 len += frac_digits+1; 4700 tzlen = strftime(&(timestamp[len]), TIMESTAMPBUFSIZE-len, "%z", <ime); 4701 len += tzlen; 4702 4703 if (tzlen == 5) { 4704 /* strftime gives "+0200", but we need "+02:00" */ 4705 timestamp[len+1] = timestamp[len]; 4706 timestamp[len] = timestamp[len-1]; 4707 timestamp[len-1] = timestamp[len-2]; 4708 timestamp[len-2] = ':'; 4709 } 4710 return timestamp; 4711 } 4712 4713 /* auxillary code to allocate memory and copy a string */ 4714 bool 4715 copy_string(char **mem, const char *p, const char *q) 4716 { 4717 const size_t len = 1 + q - p; 4718 if (!(*mem = malloc(len))) { 4719 logerror("Unable to allocate memory for config"); 4720 return false; 4721 } 4722 strlcpy(*mem, p, len); 4723 return true; 4724 } 4725 4726 /* keyword has to end with ", everything until next " is copied */ 4727 bool 4728 copy_config_value_quoted(const char *keyword, char **mem, const char **p) 4729 { 4730 const char *q; 4731 if (strncasecmp(*p, keyword, strlen(keyword))) 4732 return false; 4733 q = *p += strlen(keyword); 4734 if (!(q = strchr(*p, '"'))) { 4735 errno = 0; 4736 logerror("unterminated \"\n"); 4737 return false; 4738 } 4739 if (!(copy_string(mem, *p, q))) 4740 return false; 4741 *p = ++q; 4742 return true; 4743 } 4744 4745 /* for config file: 4746 * following = required but whitespace allowed, quotes optional 4747 * if numeric, then conversion to integer and no memory allocation 4748 */ 4749 bool 4750 copy_config_value(const char *keyword, char **mem, 4751 const char **p, const char *file, int line) 4752 { 4753 if (strncasecmp(*p, keyword, strlen(keyword))) 4754 return false; 4755 *p += strlen(keyword); 4756 4757 while (isspace((unsigned char)**p)) 4758 *p += 1; 4759 if (**p != '=') { 4760 errno = 0; 4761 logerror("expected \"=\" in file %s, line %d", file, line); 4762 return false; 4763 } 4764 *p += 1; 4765 4766 return copy_config_value_word(mem, p); 4767 } 4768 4769 /* copy next parameter from a config line */ 4770 bool 4771 copy_config_value_word(char **mem, const char **p) 4772 { 4773 const char *q; 4774 while (isspace((unsigned char)**p)) 4775 *p += 1; 4776 if (**p == '"') 4777 return copy_config_value_quoted("\"", mem, p); 4778 4779 /* without quotes: find next whitespace or end of line */ 4780 (void)((q = strchr(*p, ' ')) || (q = strchr(*p, '\t')) 4781 || (q = strchr(*p, '\n')) || (q = strchr(*p, '\0'))); 4782 4783 if (q-*p == 0 || !(copy_string(mem, *p, q))) 4784 return false; 4785 4786 *p = ++q; 4787 return true; 4788 } 4789 4790 static int 4791 writev1(int fd, struct iovec *iov, size_t count) 4792 { 4793 ssize_t nw = 0, tot = 0; 4794 size_t ntries = 5; 4795 4796 if (count == 0) 4797 return 0; 4798 while (ntries--) { 4799 switch ((nw = writev(fd, iov, count))) { 4800 case -1: 4801 if (errno == EAGAIN || errno == EWOULDBLOCK) { 4802 struct pollfd pfd; 4803 pfd.fd = fd; 4804 pfd.events = POLLOUT; 4805 pfd.revents = 0; 4806 (void)poll(&pfd, 1, 500); 4807 continue; 4808 } 4809 return -1; 4810 case 0: 4811 return 0; 4812 default: 4813 tot += nw; 4814 while (nw > 0) { 4815 if (iov->iov_len > (size_t)nw) { 4816 iov->iov_len -= nw; 4817 iov->iov_base = 4818 (char *)iov->iov_base + nw; 4819 break; 4820 } else { 4821 if (--count == 0) 4822 return tot; 4823 nw -= iov->iov_len; 4824 iov++; 4825 } 4826 } 4827 } 4828 } 4829 return tot == 0 ? nw : tot; 4830 } 4831