1 /* $NetBSD: syslogd.c,v 1.122 2015/09/05 20:19:43 dholland 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 1.122 2015/09/05 20:19:43 dholland 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 char timestamp[MAX_TIMESTAMPLEN + 1]; 277 /* 278 * Global line buffer. Since we only process one event at a time, 279 * a global one will do. But for klog, we use own buffer so that 280 * partial line at the end of buffer can be deferred. 281 */ 282 char *linebuf, *klog_linebuf; 283 size_t linebufsize, klog_linebufoff; 284 285 static const char *bindhostname = NULL; 286 287 #ifndef DISABLE_TLS 288 struct TLS_Incoming TLS_Incoming_Head = \ 289 SLIST_HEAD_INITIALIZER(TLS_Incoming_Head); 290 extern char *SSL_ERRCODE[]; 291 struct tls_global_options_t tls_opt; 292 #endif /* !DISABLE_TLS */ 293 294 int 295 main(int argc, char *argv[]) 296 { 297 int ch, j, fklog; 298 int funixsize = 0, funixmaxsize = 0; 299 struct sockaddr_un sunx; 300 char **pp; 301 struct event *ev; 302 uid_t uid = 0; 303 gid_t gid = 0; 304 char *user = NULL; 305 char *group = NULL; 306 const char *root = "/"; 307 char *endp; 308 struct group *gr; 309 struct passwd *pw; 310 unsigned long l; 311 312 /* should we set LC_TIME="C" to ensure correct timestamps&parsing? */ 313 (void)setlocale(LC_ALL, ""); 314 315 while ((ch = getopt(argc, argv, "b:dnsSf:m:o:p:P:ru:g:t:TUv")) != -1) 316 switch(ch) { 317 case 'b': 318 bindhostname = optarg; 319 break; 320 case 'd': /* debug */ 321 Debug = D_DEFAULT; 322 /* is there a way to read the integer value 323 * for Debug as an optional argument? */ 324 break; 325 case 'f': /* configuration file */ 326 ConfFile = optarg; 327 break; 328 case 'g': 329 group = optarg; 330 if (*group == '\0') 331 usage(); 332 break; 333 case 'm': /* mark interval */ 334 MarkInterval = atoi(optarg) * 60; 335 break; 336 case 'n': /* turn off DNS queries */ 337 UseNameService = 0; 338 break; 339 case 'o': /* message format */ 340 #define EQ(a) (strncmp(optarg, # a, sizeof(# a) - 1) == 0) 341 if (EQ(bsd) || EQ(rfc3264)) 342 BSDOutputFormat = true; 343 else if (EQ(syslog) || EQ(rfc5424)) 344 BSDOutputFormat = false; 345 else 346 usage(); 347 /* TODO: implement additional output option "osyslog" 348 * for old syslogd behaviour as introduced after 349 * FreeBSD PR#bin/7055. 350 */ 351 break; 352 case 'p': /* path */ 353 logpath_add(&LogPaths, &funixsize, 354 &funixmaxsize, optarg); 355 break; 356 case 'P': /* file of paths */ 357 logpath_fileadd(&LogPaths, &funixsize, 358 &funixmaxsize, optarg); 359 break; 360 case 'r': /* disable "repeated" compression */ 361 NoRepeat++; 362 break; 363 case 's': /* no network listen mode */ 364 SecureMode++; 365 break; 366 case 'S': 367 SyncKernel = 1; 368 break; 369 case 't': 370 root = optarg; 371 if (*root == '\0') 372 usage(); 373 break; 374 case 'T': 375 RemoteAddDate = 1; 376 break; 377 case 'u': 378 user = optarg; 379 if (*user == '\0') 380 usage(); 381 break; 382 case 'U': /* only log specified priority */ 383 UniquePriority = 1; 384 break; 385 case 'v': /* log facility and priority */ 386 if (LogFacPri < 2) 387 LogFacPri++; 388 break; 389 default: 390 usage(); 391 } 392 if ((argc -= optind) != 0) 393 usage(); 394 395 setlinebuf(stdout); 396 tzset(); /* init TZ information for localtime. */ 397 398 if (user != NULL) { 399 if (isdigit((unsigned char)*user)) { 400 errno = 0; 401 endp = NULL; 402 l = strtoul(user, &endp, 0); 403 if (errno || *endp != '\0') 404 goto getuser; 405 uid = (uid_t)l; 406 if (uid != l) {/* TODO: never executed */ 407 errno = 0; 408 logerror("UID out of range"); 409 die(0, 0, NULL); 410 } 411 } else { 412 getuser: 413 if ((pw = getpwnam(user)) != NULL) { 414 uid = pw->pw_uid; 415 } else { 416 errno = 0; 417 logerror("Cannot find user `%s'", user); 418 die(0, 0, NULL); 419 } 420 } 421 } 422 423 if (group != NULL) { 424 if (isdigit((unsigned char)*group)) { 425 errno = 0; 426 endp = NULL; 427 l = strtoul(group, &endp, 0); 428 if (errno || *endp != '\0') 429 goto getgroup; 430 gid = (gid_t)l; 431 if (gid != l) {/* TODO: never executed */ 432 errno = 0; 433 logerror("GID out of range"); 434 die(0, 0, NULL); 435 } 436 } else { 437 getgroup: 438 if ((gr = getgrnam(group)) != NULL) { 439 gid = gr->gr_gid; 440 } else { 441 errno = 0; 442 logerror("Cannot find group `%s'", group); 443 die(0, 0, NULL); 444 } 445 } 446 } 447 448 if (access(root, F_OK | R_OK)) { 449 logerror("Cannot access `%s'", root); 450 die(0, 0, NULL); 451 } 452 453 consfile.f_type = F_CONSOLE; 454 (void)strlcpy(consfile.f_un.f_fname, ctty, 455 sizeof(consfile.f_un.f_fname)); 456 linebufsize = getmsgbufsize(); 457 if (linebufsize < MAXLINE) 458 linebufsize = MAXLINE; 459 linebufsize++; 460 461 if (!(linebuf = malloc(linebufsize))) { 462 logerror("Couldn't allocate buffer"); 463 die(0, 0, NULL); 464 } 465 if (!(klog_linebuf = malloc(linebufsize))) { 466 logerror("Couldn't allocate buffer for klog"); 467 die(0, 0, NULL); 468 } 469 470 471 #ifndef SUN_LEN 472 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 473 #endif 474 if (funixsize == 0) 475 logpath_add(&LogPaths, &funixsize, 476 &funixmaxsize, _PATH_LOG); 477 funix = malloc(sizeof(*funix) * funixsize); 478 if (funix == NULL) { 479 logerror("Couldn't allocate funix descriptors"); 480 die(0, 0, NULL); 481 } 482 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 483 DPRINTF(D_NET, "Making unix dgram socket `%s'\n", *pp); 484 unlink(*pp); 485 memset(&sunx, 0, sizeof(sunx)); 486 sunx.sun_family = AF_LOCAL; 487 (void)strncpy(sunx.sun_path, *pp, sizeof(sunx.sun_path)); 488 funix[j] = socket(AF_LOCAL, SOCK_DGRAM, 0); 489 if (funix[j] < 0 || bind(funix[j], 490 (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 || 491 chmod(*pp, 0666) < 0) { 492 logerror("Cannot create `%s'", *pp); 493 die(0, 0, NULL); 494 } 495 DPRINTF(D_NET, "Listening on unix dgram socket `%s'\n", *pp); 496 } 497 498 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) < 0) { 499 DPRINTF(D_FILE, "Can't open `%s' (%d)\n", _PATH_KLOG, errno); 500 } else { 501 DPRINTF(D_FILE, "Listening on kernel log `%s' with fd %d\n", 502 _PATH_KLOG, fklog); 503 } 504 505 #if (!defined(DISABLE_TLS) && !defined(DISABLE_SIGN)) 506 /* basic OpenSSL init */ 507 SSL_load_error_strings(); 508 (void) SSL_library_init(); 509 OpenSSL_add_all_digests(); 510 /* OpenSSL PRNG needs /dev/urandom, thus initialize before chroot() */ 511 if (!RAND_status()) { 512 errno = 0; 513 logerror("Unable to initialize OpenSSL PRNG"); 514 } else { 515 DPRINTF(D_TLS, "Initializing PRNG\n"); 516 } 517 #endif /* (!defined(DISABLE_TLS) && !defined(DISABLE_SIGN)) */ 518 #ifndef DISABLE_SIGN 519 /* initialize rsid -- we will use that later to determine 520 * whether sign_global_init() was already called */ 521 GlobalSign.rsid = 0; 522 #endif /* !DISABLE_SIGN */ 523 #if (IETF_NUM_PRIVALUES != (LOG_NFACILITIES<<3)) 524 logerror("Warning: system defines %d priority values, but " 525 "syslog-protocol/syslog-sign specify %d values", 526 LOG_NFACILITIES, SIGN_NUM_PRIVALS); 527 #endif 528 529 /* 530 * All files are open, we can drop privileges and chroot 531 */ 532 DPRINTF(D_MISC, "Attempt to chroot to `%s'\n", root); 533 if (chroot(root) == -1) { 534 logerror("Failed to chroot to `%s'", root); 535 die(0, 0, NULL); 536 } 537 DPRINTF(D_MISC, "Attempt to set GID/EGID to `%d'\n", gid); 538 if (setgid(gid) || setegid(gid)) { 539 logerror("Failed to set gid to `%d'", gid); 540 die(0, 0, NULL); 541 } 542 DPRINTF(D_MISC, "Attempt to set UID/EUID to `%d'\n", uid); 543 if (setuid(uid) || seteuid(uid)) { 544 logerror("Failed to set uid to `%d'", uid); 545 die(0, 0, NULL); 546 } 547 /* 548 * We cannot detach from the terminal before we are sure we won't 549 * have a fatal error, because error message would not go to the 550 * terminal and would not be logged because syslogd dies. 551 * All die() calls are behind us, we can call daemon() 552 */ 553 if (!Debug) { 554 (void)daemon(0, 0); 555 daemonized = 1; 556 /* tuck my process id away, if i'm not in debug mode */ 557 #ifdef __NetBSD_Version__ 558 pidfile(NULL); 559 #endif /* __NetBSD_Version__ */ 560 } 561 562 #define MAX_PID_LEN 5 563 include_pid = malloc(MAX_PID_LEN+1); 564 snprintf(include_pid, MAX_PID_LEN+1, "%d", getpid()); 565 566 /* 567 * Create the global kernel event descriptor. 568 * 569 * NOTE: We MUST do this after daemon(), bacause the kqueue() 570 * API dictates that kqueue descriptors are not inherited 571 * across forks (lame!). 572 */ 573 (void)event_init(); 574 575 /* 576 * We must read the configuration file for the first time 577 * after the kqueue descriptor is created, because we install 578 * events during this process. 579 */ 580 init(0, 0, NULL); 581 582 /* 583 * Always exit on SIGTERM. Also exit on SIGINT and SIGQUIT 584 * if we're debugging. 585 */ 586 (void)signal(SIGTERM, SIG_IGN); 587 (void)signal(SIGINT, SIG_IGN); 588 (void)signal(SIGQUIT, SIG_IGN); 589 590 ev = allocev(); 591 signal_set(ev, SIGTERM, die, ev); 592 EVENT_ADD(ev); 593 594 if (Debug) { 595 ev = allocev(); 596 signal_set(ev, SIGINT, die, ev); 597 EVENT_ADD(ev); 598 ev = allocev(); 599 signal_set(ev, SIGQUIT, die, ev); 600 EVENT_ADD(ev); 601 } 602 603 ev = allocev(); 604 signal_set(ev, SIGCHLD, reapchild, ev); 605 EVENT_ADD(ev); 606 607 ev = allocev(); 608 schedule_event(&ev, 609 &((struct timeval){TIMERINTVL, 0}), 610 domark, ev); 611 612 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */ 613 614 /* Re-read configuration on SIGHUP. */ 615 (void) signal(SIGHUP, SIG_IGN); 616 ev = allocev(); 617 signal_set(ev, SIGHUP, init, ev); 618 EVENT_ADD(ev); 619 620 #ifndef DISABLE_TLS 621 ev = allocev(); 622 signal_set(ev, SIGUSR1, dispatch_force_tls_reconnect, ev); 623 EVENT_ADD(ev); 624 #endif /* !DISABLE_TLS */ 625 626 if (fklog >= 0) { 627 ev = allocev(); 628 DPRINTF(D_EVENT, 629 "register klog for fd %d with ev@%p\n", fklog, ev); 630 event_set(ev, fklog, EV_READ | EV_PERSIST, 631 dispatch_read_klog, ev); 632 EVENT_ADD(ev); 633 } 634 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 635 ev = allocev(); 636 event_set(ev, funix[j], EV_READ | EV_PERSIST, 637 dispatch_read_funix, ev); 638 EVENT_ADD(ev); 639 } 640 641 DPRINTF(D_MISC, "Off & running....\n"); 642 643 j = event_dispatch(); 644 /* normal termination via die(), reaching this is an error */ 645 DPRINTF(D_MISC, "event_dispatch() returned %d\n", j); 646 die(0, 0, NULL); 647 /*NOTREACHED*/ 648 return 0; 649 } 650 651 void 652 usage(void) 653 { 654 655 (void)fprintf(stderr, 656 "usage: %s [-dnrSsTUv] [-b bind_address] [-f config_file] [-g group]\n" 657 "\t[-m mark_interval] [-P file_list] [-p log_socket\n" 658 "\t[-p log_socket2 ...]] [-t chroot_dir] [-u user]\n", 659 getprogname()); 660 exit(1); 661 } 662 663 /* 664 * Dispatch routine for reading /dev/klog 665 * 666 * Note: slightly different semantic in dispatch_read functions: 667 * - read_klog() might give multiple messages in linebuf and 668 * leaves the task of splitting them to printsys() 669 * - all other read functions receive one message and 670 * then call printline() with one buffer. 671 */ 672 static void 673 dispatch_read_klog(int fd, short event, void *ev) 674 { 675 ssize_t rv; 676 size_t resid = linebufsize - klog_linebufoff; 677 678 DPRINTF((D_CALL|D_EVENT), "Kernel log active (%d, %d, %p)" 679 " with linebuf@%p, length %zu)\n", fd, event, ev, 680 klog_linebuf, linebufsize); 681 682 rv = read(fd, &klog_linebuf[klog_linebufoff], resid - 1); 683 if (rv > 0) { 684 klog_linebuf[klog_linebufoff + rv] = '\0'; 685 printsys(klog_linebuf); 686 } else if (rv < 0 && errno != EINTR) { 687 /* 688 * /dev/klog has croaked. Disable the event 689 * so it won't bother us again. 690 */ 691 logerror("klog failed"); 692 event_del(ev); 693 } 694 } 695 696 /* 697 * Dispatch routine for reading Unix domain sockets. 698 */ 699 static void 700 dispatch_read_funix(int fd, short event, void *ev) 701 { 702 struct sockaddr_un myname, fromunix; 703 ssize_t rv; 704 socklen_t sunlen; 705 706 sunlen = sizeof(myname); 707 if (getsockname(fd, (struct sockaddr *)&myname, &sunlen) != 0) { 708 /* 709 * This should never happen, so ensure that it doesn't 710 * happen again. 711 */ 712 logerror("getsockname() unix failed"); 713 event_del(ev); 714 return; 715 } 716 717 #define SUN_PATHLEN(su) \ 718 ((su)->sun_len - (sizeof(*(su)) - sizeof((su)->sun_path))) 719 720 DPRINTF((D_CALL|D_EVENT|D_NET), "Unix socket (%.*s) active (%d, %d %p)" 721 " with linebuf@%p, size %zu)\n", (int)SUN_PATHLEN(&myname), 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 (int)SUN_PATHLEN(&myname), 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 = make_timestamp(NULL, !BSDOutputFormat, 0); 1049 } 1050 1051 start = p; 1052 NEXTFIELD(p); 1053 /* extract host */ 1054 for (start = p;; p++) { 1055 if ((*p == ' ' || *p == '\0') 1056 && start == p-1 && *(p-1) == '-') { 1057 /* NILVALUE */ 1058 break; 1059 } else if ((*p == ' ' || *p == '\0') 1060 && (start != p-1 || *(p-1) != '-')) { 1061 buffer->host = strndup(start, p - start); 1062 break; 1063 } else { 1064 *p = FORCE2ASCII(*p); 1065 } 1066 } 1067 /* p @ SP after host */ 1068 DPRINTF(D_DATA, "Got host \"%s\"\n", buffer->host); 1069 1070 /* extract app-name */ 1071 NEXTFIELD(p); 1072 for (start = p;; p++) { 1073 if ((*p == ' ' || *p == '\0') 1074 && start == p-1 && *(p-1) == '-') { 1075 /* NILVALUE */ 1076 break; 1077 } else if ((*p == ' ' || *p == '\0') 1078 && (start != p-1 || *(p-1) != '-')) { 1079 buffer->prog = strndup(start, p - start); 1080 break; 1081 } else { 1082 *p = FORCE2ASCII(*p); 1083 } 1084 } 1085 DPRINTF(D_DATA, "Got prog \"%s\"\n", buffer->prog); 1086 1087 /* extract procid */ 1088 NEXTFIELD(p); 1089 for (start = p;; p++) { 1090 if ((*p == ' ' || *p == '\0') 1091 && start == p-1 && *(p-1) == '-') { 1092 /* NILVALUE */ 1093 break; 1094 } else if ((*p == ' ' || *p == '\0') 1095 && (start != p-1 || *(p-1) != '-')) { 1096 buffer->pid = strndup(start, p - start); 1097 start = p; 1098 break; 1099 } else { 1100 *p = FORCE2ASCII(*p); 1101 } 1102 } 1103 DPRINTF(D_DATA, "Got pid \"%s\"\n", buffer->pid); 1104 1105 /* extract msgid */ 1106 NEXTFIELD(p); 1107 for (start = p;; p++) { 1108 if ((*p == ' ' || *p == '\0') 1109 && start == p-1 && *(p-1) == '-') { 1110 /* NILVALUE */ 1111 start = p+1; 1112 break; 1113 } else if ((*p == ' ' || *p == '\0') 1114 && (start != p-1 || *(p-1) != '-')) { 1115 buffer->msgid = strndup(start, p - start); 1116 start = p+1; 1117 break; 1118 } else { 1119 *p = FORCE2ASCII(*p); 1120 } 1121 } 1122 DPRINTF(D_DATA, "Got msgid \"%s\"\n", buffer->msgid); 1123 1124 /* extract SD */ 1125 NEXTFIELD(p); 1126 start = p; 1127 sdlen = check_sd(p); 1128 DPRINTF(D_DATA, "check_sd(\"%s\") returned %d\n", p, sdlen); 1129 1130 if (sdlen == 1 && *p == '-') { 1131 /* NILVALUE */ 1132 p++; 1133 } else if (sdlen > 1) { 1134 buffer->sd = strndup(p, sdlen); 1135 p += sdlen; 1136 } else { 1137 DPRINTF(D_DATA, "format error\n"); 1138 } 1139 if (*p == '\0') start = p; 1140 else if (*p == ' ') start = ++p; /* SP */ 1141 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1142 1143 /* and now the message itself 1144 * note: move back to last start to check for BOM 1145 */ 1146 all_syslog_msg: 1147 p = start; 1148 1149 /* check for UTF-8-BOM */ 1150 if (IS_BOM(p)) { 1151 DPRINTF(D_DATA, "UTF-8 BOM\n"); 1152 utf8allowed = true; 1153 p += 3; 1154 } 1155 1156 if (*p != '\0' && !utf8allowed) { 1157 size_t msglen; 1158 1159 msglen = strlen(p); 1160 assert(!buffer->msg); 1161 buffer->msg = copy_utf8_ascii(p, msglen); 1162 buffer->msgorig = buffer->msg; 1163 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1164 } else if (*p != '\0' && utf8allowed) { 1165 while (*p != '\0') { 1166 i = valid_utf8(p); 1167 if (i == 0) 1168 *p++ = '?'; 1169 else if (i == 1) 1170 *p = FORCE2ASCII(*p); 1171 p += i; 1172 } 1173 assert(p != start); 1174 assert(!buffer->msg); 1175 buffer->msg = strndup(start, p - start); 1176 buffer->msgorig = buffer->msg; 1177 buffer->msglen = buffer->msgsize = 1 + p - start; 1178 } 1179 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1180 1181 buffer->recvhost = strdup(hname); 1182 buffer->pri = pri; 1183 buffer->flags = flags; 1184 1185 return buffer; 1186 } 1187 1188 /* copies an input into a new ASCII buffer 1189 * ASCII controls are converted to format "^X" 1190 * multi-byte UTF-8 chars are converted to format "<ab><cd>" 1191 */ 1192 #define INIT_BUFSIZE 512 1193 char * 1194 copy_utf8_ascii(char *p, size_t p_len) 1195 { 1196 size_t idst = 0, isrc = 0, dstsize = INIT_BUFSIZE, i; 1197 char *dst, *tmp_dst; 1198 1199 MALLOC(dst, dstsize); 1200 while (isrc < p_len) { 1201 if (dstsize < idst + 10) { 1202 /* check for enough space for \0 and a UTF-8 1203 * conversion; longest possible is <U+123456> */ 1204 tmp_dst = realloc(dst, dstsize + INIT_BUFSIZE); 1205 if (!tmp_dst) 1206 break; 1207 dst = tmp_dst; 1208 dstsize += INIT_BUFSIZE; 1209 } 1210 1211 i = valid_utf8(&p[isrc]); 1212 if (i == 0) { /* invalid encoding */ 1213 dst[idst++] = '?'; 1214 isrc++; 1215 } else if (i == 1) { /* check printable */ 1216 if (iscntrl((unsigned char)p[isrc]) 1217 && p[isrc] != '\t') { 1218 if (p[isrc] == '\n') { 1219 dst[idst++] = ' '; 1220 isrc++; 1221 } else { 1222 dst[idst++] = '^'; 1223 dst[idst++] = p[isrc++] ^ 0100; 1224 } 1225 } else 1226 dst[idst++] = p[isrc++]; 1227 } else { /* convert UTF-8 to ASCII */ 1228 dst[idst++] = '<'; 1229 idst += snprintf(&dst[idst], dstsize - idst, "U+%x", 1230 get_utf8_value(&p[isrc])); 1231 isrc += i; 1232 dst[idst++] = '>'; 1233 } 1234 } 1235 dst[idst] = '\0'; 1236 1237 /* shrink buffer to right size */ 1238 tmp_dst = realloc(dst, idst+1); 1239 if (tmp_dst) 1240 return tmp_dst; 1241 else 1242 return dst; 1243 } 1244 1245 struct buf_msg * 1246 printline_bsdsyslog(const char *hname, char *msg, 1247 int flags, int pri) 1248 { 1249 struct buf_msg *buffer; 1250 char *p, *start; 1251 unsigned msgidlen = 0, sdlen = 0; 1252 1253 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_bsdsyslog(" 1254 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1255 1256 buffer = buf_msg_new(0); 1257 p = msg; 1258 p += check_timestamp((unsigned char*) p, 1259 &buffer->timestamp, false, !BSDOutputFormat); 1260 DPRINTF(D_DATA, "Got timestamp \"%s\"\n", buffer->timestamp); 1261 1262 if (flags & ADDDATE || !buffer->timestamp) { 1263 FREEPTR(buffer->timestamp); 1264 buffer->timestamp = make_timestamp(NULL, !BSDOutputFormat, 0); 1265 } 1266 1267 if (*p == ' ') p++; /* SP */ 1268 else goto all_bsd_msg; 1269 /* in any error case we skip header parsing and 1270 * treat all following data as message content */ 1271 1272 /* extract host */ 1273 for (start = p;; p++) { 1274 if (*p == ' ' || *p == '\0') { 1275 buffer->host = strndup(start, p - start); 1276 break; 1277 } else if (*p == '[' || (*p == ':' 1278 && (*(p+1) == ' ' || *(p+1) == '\0'))) { 1279 /* no host in message */ 1280 buffer->host = LocalFQDN; 1281 buffer->prog = strndup(start, p - start); 1282 break; 1283 } else { 1284 *p = FORCE2ASCII(*p); 1285 } 1286 } 1287 DPRINTF(D_DATA, "Got host \"%s\"\n", buffer->host); 1288 /* p @ SP after host, or @ :/[ after prog */ 1289 1290 /* extract program */ 1291 if (!buffer->prog) { 1292 if (*p == ' ') p++; /* SP */ 1293 else goto all_bsd_msg; 1294 1295 for (start = p;; p++) { 1296 if (*p == ' ' || *p == '\0') { /* error */ 1297 goto all_bsd_msg; 1298 } else if (*p == '[' || (*p == ':' 1299 && (*(p+1) == ' ' || *(p+1) == '\0'))) { 1300 buffer->prog = strndup(start, p - start); 1301 break; 1302 } else { 1303 *p = FORCE2ASCII(*p); 1304 } 1305 } 1306 } 1307 DPRINTF(D_DATA, "Got prog \"%s\"\n", buffer->prog); 1308 start = p; 1309 1310 /* p @ :/[ after prog */ 1311 if (*p == '[') { 1312 p++; 1313 if (*p == ' ') p++; /* SP */ 1314 for (start = p;; p++) { 1315 if (*p == ' ' || *p == '\0') { /* error */ 1316 goto all_bsd_msg; 1317 } else if (*p == ']') { 1318 buffer->pid = strndup(start, p - start); 1319 break; 1320 } else { 1321 *p = FORCE2ASCII(*p); 1322 } 1323 } 1324 } 1325 DPRINTF(D_DATA, "Got pid \"%s\"\n", buffer->pid); 1326 1327 if (*p == ']') p++; 1328 if (*p == ':') p++; 1329 if (*p == ' ') p++; 1330 1331 /* p @ msgid, @ opening [ of SD or @ first byte of message 1332 * accept either case and try to detect MSGID and SD fields 1333 * 1334 * only limitation: we do not accept UTF-8 data in 1335 * BSD Syslog messages -- so all SD values are ASCII-filtered 1336 * 1337 * I have found one scenario with 'unexpected' behaviour: 1338 * if there is only a SD intended, but a) it is short enough 1339 * to be a MSGID and b) the first word of the message can also 1340 * be parsed as an SD. 1341 * example: 1342 * "<35>Jul 6 12:39:08 tag[123]: [exampleSDID@0] - hello" 1343 * --> parsed as 1344 * MSGID = "[exampleSDID@0]" 1345 * SD = "-" 1346 * MSG = "hello" 1347 */ 1348 start = p; 1349 msgidlen = check_msgid(p); 1350 if (msgidlen) /* check for SD in 2nd field */ 1351 sdlen = check_sd(p+msgidlen+1); 1352 1353 if (msgidlen && sdlen) { 1354 /* MSGID in 1st and SD in 2nd field 1355 * now check for NILVALUEs and copy */ 1356 if (msgidlen == 1 && *p == '-') { 1357 p++; /* - */ 1358 p++; /* SP */ 1359 DPRINTF(D_DATA, "Got MSGID \"-\"\n"); 1360 } else { 1361 /* only has ASCII chars after check_msgid() */ 1362 buffer->msgid = strndup(p, msgidlen); 1363 p += msgidlen; 1364 p++; /* SP */ 1365 DPRINTF(D_DATA, "Got MSGID \"%s\"\n", 1366 buffer->msgid); 1367 } 1368 } else { 1369 /* either no msgid or no SD in 2nd field 1370 * --> check 1st field for SD */ 1371 DPRINTF(D_DATA, "No MSGID\n"); 1372 sdlen = check_sd(p); 1373 } 1374 1375 if (sdlen == 0) { 1376 DPRINTF(D_DATA, "No SD\n"); 1377 } else if (sdlen > 1) { 1378 buffer->sd = copy_utf8_ascii(p, sdlen); 1379 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1380 } else if (sdlen == 1 && *p == '-') { 1381 p++; 1382 DPRINTF(D_DATA, "Got SD \"-\"\n"); 1383 } else { 1384 DPRINTF(D_DATA, "Error\n"); 1385 } 1386 1387 if (*p == ' ') p++; 1388 start = p; 1389 /* and now the message itself 1390 * note: do not reset start, because we might come here 1391 * by goto and want to have the incomplete field as part 1392 * of the msg 1393 */ 1394 all_bsd_msg: 1395 if (*p != '\0') { 1396 size_t msglen = strlen(p); 1397 buffer->msg = copy_utf8_ascii(p, msglen); 1398 buffer->msgorig = buffer->msg; 1399 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1400 } 1401 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1402 1403 buffer->recvhost = strdup(hname); 1404 buffer->pri = pri; 1405 buffer->flags = flags | BSDSYSLOG; 1406 1407 return buffer; 1408 } 1409 1410 struct buf_msg * 1411 printline_kernelprintf(const char *hname, char *msg, 1412 int flags, int pri) 1413 { 1414 struct buf_msg *buffer; 1415 char *p; 1416 unsigned sdlen = 0; 1417 1418 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_kernelprintf(" 1419 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1420 1421 buffer = buf_msg_new(0); 1422 buffer->timestamp = make_timestamp(NULL, !BSDOutputFormat, 0); 1423 buffer->pri = pri; 1424 buffer->flags = flags; 1425 1426 /* assume there is no MSGID but there might be SD */ 1427 p = msg; 1428 sdlen = check_sd(p); 1429 1430 if (sdlen == 0) { 1431 DPRINTF(D_DATA, "No SD\n"); 1432 } else if (sdlen > 1) { 1433 buffer->sd = copy_utf8_ascii(p, sdlen); 1434 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1435 } else if (sdlen == 1 && *p == '-') { 1436 p++; 1437 DPRINTF(D_DATA, "Got SD \"-\"\n"); 1438 } else { 1439 DPRINTF(D_DATA, "Error\n"); 1440 } 1441 1442 if (*p == ' ') p++; 1443 if (*p != '\0') { 1444 size_t msglen = strlen(p); 1445 buffer->msg = copy_utf8_ascii(p, msglen); 1446 buffer->msgorig = buffer->msg; 1447 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1448 } 1449 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1450 1451 return buffer; 1452 } 1453 1454 /* 1455 * Take a raw input line, read priority and version, call the 1456 * right message parsing function, then call logmsg(). 1457 */ 1458 void 1459 printline(const char *hname, char *msg, int flags) 1460 { 1461 struct buf_msg *buffer; 1462 int pri; 1463 char *p, *q; 1464 long n; 1465 bool bsdsyslog = true; 1466 1467 DPRINTF((D_CALL|D_BUFFER|D_DATA), 1468 "printline(\"%s\", \"%s\", %d)\n", hname, msg, flags); 1469 1470 /* test for special codes */ 1471 pri = DEFUPRI; 1472 p = msg; 1473 if (*p == '<') { 1474 errno = 0; 1475 n = strtol(p + 1, &q, 10); 1476 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { 1477 p = q + 1; 1478 pri = (int)n; 1479 /* check for syslog-protocol version */ 1480 if (*p == '1' && p[1] == ' ') { 1481 p += 2; /* skip version and space */ 1482 bsdsyslog = false; 1483 } else { 1484 bsdsyslog = true; 1485 } 1486 } 1487 } 1488 if (pri & ~(LOG_FACMASK|LOG_PRIMASK)) 1489 pri = DEFUPRI; 1490 1491 /* 1492 * Don't allow users to log kernel messages. 1493 * NOTE: Since LOG_KERN == 0, this will also match 1494 * messages with no facility specified. 1495 */ 1496 if ((pri & LOG_FACMASK) == LOG_KERN) 1497 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); 1498 1499 if (bsdsyslog) { 1500 buffer = printline_bsdsyslog(hname, p, flags, pri); 1501 } else { 1502 buffer = printline_syslogprotocol(hname, p, flags, pri); 1503 } 1504 logmsg(buffer); 1505 DELREF(buffer); 1506 } 1507 1508 /* 1509 * Take a raw input line from /dev/klog, split and format similar to syslog(). 1510 */ 1511 void 1512 printsys(char *msg) 1513 { 1514 int n, is_printf, pri, flags; 1515 char *p, *q; 1516 struct buf_msg *buffer; 1517 1518 klog_linebufoff = 0; 1519 for (p = msg; *p != '\0'; ) { 1520 bool bsdsyslog = true; 1521 1522 is_printf = 1; 1523 flags = ISKERNEL | ADDDATE | BSDSYSLOG; 1524 if (SyncKernel) 1525 flags |= SYNC_FILE; 1526 if (is_printf) /* kernel printf's come out on console */ 1527 flags |= IGN_CONS; 1528 pri = DEFSPRI; 1529 1530 if (*p == '<') { 1531 errno = 0; 1532 n = (int)strtol(p + 1, &q, 10); 1533 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { 1534 p = q + 1; 1535 is_printf = 0; 1536 pri = n; 1537 if (*p == '1') { /* syslog-protocol version */ 1538 p += 2; /* skip version and space */ 1539 bsdsyslog = false; 1540 } else { 1541 bsdsyslog = true; 1542 } 1543 } 1544 } 1545 for (q = p; *q != '\0' && *q != '\n'; q++) 1546 /* look for end of line; no further checks. 1547 * trust the kernel to send ASCII only */; 1548 if (*q != '\0') 1549 *q++ = '\0'; 1550 else { 1551 memcpy(linebuf, p, klog_linebufoff = q - p); 1552 break; 1553 } 1554 1555 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 1556 pri = DEFSPRI; 1557 1558 /* allow all kinds of input from kernel */ 1559 if (is_printf) 1560 buffer = printline_kernelprintf( 1561 LocalFQDN, p, flags, pri); 1562 else { 1563 if (bsdsyslog) 1564 buffer = printline_bsdsyslog( 1565 LocalFQDN, p, flags, pri); 1566 else 1567 buffer = printline_syslogprotocol( 1568 LocalFQDN, p, flags, pri); 1569 } 1570 1571 /* set fields left open */ 1572 if (!buffer->prog) 1573 buffer->prog = strdup(_PATH_UNIX); 1574 if (!buffer->host) 1575 buffer->host = LocalFQDN; 1576 if (!buffer->recvhost) 1577 buffer->recvhost = LocalFQDN; 1578 1579 logmsg(buffer); 1580 DELREF(buffer); 1581 p = q; 1582 } 1583 } 1584 1585 /* 1586 * Check to see if `name' matches the provided specification, using the 1587 * specified strstr function. 1588 */ 1589 int 1590 matches_spec(const char *name, const char *spec, 1591 char *(*check)(const char *, const char *)) 1592 { 1593 const char *s; 1594 const char *cursor; 1595 char prev, next; 1596 size_t len; 1597 1598 if (name[0] == '\0') 1599 return 0; 1600 1601 if (strchr(name, ',')) /* sanity */ 1602 return 0; 1603 1604 len = strlen(name); 1605 cursor = spec; 1606 while ((s = (*check)(cursor, name)) != NULL) { 1607 prev = s == spec ? ',' : *(s - 1); 1608 cursor = s + len; 1609 next = *cursor; 1610 1611 if (prev == ',' && (next == '\0' || next == ',')) 1612 return 1; 1613 } 1614 1615 return 0; 1616 } 1617 1618 /* 1619 * wrapper with old function signature, 1620 * keeps calling code shorter and hides buffer allocation 1621 */ 1622 void 1623 logmsg_async(int pri, const char *sd, const char *msg, int flags) 1624 { 1625 struct buf_msg *buffer; 1626 size_t msglen; 1627 1628 DPRINTF((D_CALL|D_DATA), "logmsg_async(%d, \"%s\", \"%s\", %d)\n", 1629 pri, sd, msg, flags); 1630 1631 if (msg) { 1632 msglen = strlen(msg); 1633 msglen++; /* adds \0 */ 1634 buffer = buf_msg_new(msglen); 1635 buffer->msglen = strlcpy(buffer->msg, msg, msglen) + 1; 1636 } else { 1637 buffer = buf_msg_new(0); 1638 } 1639 if (sd) buffer->sd = strdup(sd); 1640 buffer->timestamp = make_timestamp(NULL, !BSDOutputFormat, 0); 1641 buffer->prog = appname; 1642 buffer->pid = include_pid; 1643 buffer->recvhost = buffer->host = LocalFQDN; 1644 buffer->pri = pri; 1645 buffer->flags = flags; 1646 1647 logmsg(buffer); 1648 DELREF(buffer); 1649 } 1650 1651 /* read timestamp in from_buf, convert into a timestamp in to_buf 1652 * 1653 * returns length of timestamp found in from_buf (= number of bytes consumed) 1654 */ 1655 size_t 1656 check_timestamp(unsigned char *from_buf, char **to_buf, 1657 bool from_iso, bool to_iso) 1658 { 1659 unsigned char *q; 1660 int p; 1661 bool found_ts = false; 1662 1663 DPRINTF((D_CALL|D_DATA), "check_timestamp(%p = \"%s\", from_iso=%d, " 1664 "to_iso=%d)\n", from_buf, from_buf, from_iso, to_iso); 1665 1666 if (!from_buf) return 0; 1667 /* 1668 * Check to see if msg looks non-standard. 1669 * looks at every char because we do not have a msg length yet 1670 */ 1671 /* detailed checking adapted from Albert Mietus' sl_timestamp.c */ 1672 if (from_iso) { 1673 if (from_buf[4] == '-' && from_buf[7] == '-' 1674 && from_buf[10] == 'T' && from_buf[13] == ':' 1675 && from_buf[16] == ':' 1676 && isdigit(from_buf[0]) && isdigit(from_buf[1]) 1677 && isdigit(from_buf[2]) && isdigit(from_buf[3]) /* YYYY */ 1678 && isdigit(from_buf[5]) && isdigit(from_buf[6]) 1679 && isdigit(from_buf[8]) && isdigit(from_buf[9]) /* mm dd */ 1680 && isdigit(from_buf[11]) && isdigit(from_buf[12]) /* HH */ 1681 && isdigit(from_buf[14]) && isdigit(from_buf[15]) /* MM */ 1682 && isdigit(from_buf[17]) && isdigit(from_buf[18]) /* SS */ 1683 ) { 1684 /* time-secfrac */ 1685 if (from_buf[19] == '.') 1686 for (p=20; isdigit(from_buf[p]); p++) /* NOP*/; 1687 else 1688 p = 19; 1689 /* time-offset */ 1690 if (from_buf[p] == 'Z' 1691 || ((from_buf[p] == '+' || from_buf[p] == '-') 1692 && from_buf[p+3] == ':' 1693 && isdigit(from_buf[p+1]) && isdigit(from_buf[p+2]) 1694 && isdigit(from_buf[p+4]) && isdigit(from_buf[p+5]) 1695 )) 1696 found_ts = true; 1697 } 1698 } else { 1699 if (from_buf[3] == ' ' && from_buf[6] == ' ' 1700 && from_buf[9] == ':' && from_buf[12] == ':' 1701 && (from_buf[4] == ' ' || isdigit(from_buf[4])) 1702 && isdigit(from_buf[5]) /* dd */ 1703 && isdigit(from_buf[7]) && isdigit(from_buf[8]) /* HH */ 1704 && isdigit(from_buf[10]) && isdigit(from_buf[11]) /* MM */ 1705 && isdigit(from_buf[13]) && isdigit(from_buf[14]) /* SS */ 1706 && isupper(from_buf[0]) && islower(from_buf[1]) /* month */ 1707 && islower(from_buf[2])) 1708 found_ts = true; 1709 } 1710 if (!found_ts) { 1711 if (from_buf[0] == '-' && from_buf[1] == ' ') { 1712 /* NILVALUE */ 1713 if (to_iso) { 1714 /* with ISO = syslog-protocol output leave 1715 * it as is, because it is better to have 1716 * no timestamp than a wrong one. 1717 */ 1718 *to_buf = strdup("-"); 1719 } else { 1720 /* with BSD Syslog the field is reqired 1721 * so replace it with current time 1722 */ 1723 *to_buf = make_timestamp(NULL, false, 0); 1724 } 1725 return 2; 1726 } 1727 *to_buf = make_timestamp(NULL, false, 0); 1728 return 0; 1729 } 1730 1731 if (!from_iso && !to_iso) { 1732 /* copy BSD timestamp */ 1733 DPRINTF(D_CALL, "check_timestamp(): copy BSD timestamp\n"); 1734 *to_buf = strndup((char *)from_buf, BSD_TIMESTAMPLEN); 1735 return BSD_TIMESTAMPLEN; 1736 } else if (from_iso && to_iso) { 1737 /* copy ISO timestamp */ 1738 DPRINTF(D_CALL, "check_timestamp(): copy ISO timestamp\n"); 1739 if (!(q = (unsigned char *) strchr((char *)from_buf, ' '))) 1740 q = from_buf + strlen((char *)from_buf); 1741 *to_buf = strndup((char *)from_buf, q - from_buf); 1742 return q - from_buf; 1743 } else if (from_iso && !to_iso) { 1744 /* convert ISO->BSD */ 1745 struct tm parsed; 1746 time_t timeval; 1747 char tsbuf[MAX_TIMESTAMPLEN]; 1748 int i = 0; 1749 1750 DPRINTF(D_CALL, "check_timestamp(): convert ISO->BSD\n"); 1751 for(i = 0; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1752 && from_buf[i] != '.' && from_buf[i] != ' '; i++) 1753 tsbuf[i] = from_buf[i]; /* copy date & time */ 1754 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1755 && from_buf[i] != '+' && from_buf[i] != '-' 1756 && from_buf[i] != 'Z' && from_buf[i] != ' '; i++) 1757 ; /* skip fraction digits */ 1758 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1759 && from_buf[i] != ':' && from_buf[i] != ' ' ; i++) 1760 tsbuf[i] = from_buf[i]; /* copy TZ */ 1761 if (from_buf[i] == ':') i++; /* skip colon */ 1762 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1763 && from_buf[i] != ' ' ; i++) 1764 tsbuf[i] = from_buf[i]; /* copy TZ */ 1765 1766 (void)memset(&parsed, 0, sizeof(parsed)); 1767 parsed.tm_isdst = -1; 1768 (void)strptime(tsbuf, "%FT%T%z", &parsed); 1769 timeval = mktime(&parsed); 1770 1771 *to_buf = make_timestamp(&timeval, false, BSD_TIMESTAMPLEN); 1772 return i; 1773 } else if (!from_iso && to_iso) { 1774 /* convert BSD->ISO */ 1775 struct tm parsed; 1776 struct tm *current; 1777 time_t timeval; 1778 1779 (void)memset(&parsed, 0, sizeof(parsed)); 1780 parsed.tm_isdst = -1; 1781 DPRINTF(D_CALL, "check_timestamp(): convert BSD->ISO\n"); 1782 strptime((char *)from_buf, "%b %d %T", &parsed); 1783 current = gmtime(&now); 1784 1785 /* use current year and timezone */ 1786 parsed.tm_isdst = current->tm_isdst; 1787 parsed.tm_gmtoff = current->tm_gmtoff; 1788 parsed.tm_year = current->tm_year; 1789 if (current->tm_mon == 0 && parsed.tm_mon == 11) 1790 parsed.tm_year--; 1791 1792 timeval = mktime(&parsed); 1793 *to_buf = make_timestamp(&timeval, true, MAX_TIMESTAMPLEN - 1); 1794 1795 return BSD_TIMESTAMPLEN; 1796 } else { 1797 DPRINTF(D_MISC, 1798 "Executing unreachable code in check_timestamp()\n"); 1799 return 0; 1800 } 1801 } 1802 1803 /* 1804 * Log a message to the appropriate log files, users, etc. based on 1805 * the priority. 1806 */ 1807 void 1808 logmsg(struct buf_msg *buffer) 1809 { 1810 struct filed *f; 1811 int fac, omask, prilev; 1812 1813 DPRINTF((D_CALL|D_BUFFER), "logmsg: buffer@%p, pri 0%o/%d, flags 0x%x," 1814 " timestamp \"%s\", from \"%s\", sd \"%s\", msg \"%s\"\n", 1815 buffer, buffer->pri, buffer->pri, buffer->flags, 1816 buffer->timestamp, buffer->recvhost, buffer->sd, buffer->msg); 1817 1818 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM)); 1819 1820 /* sanity check */ 1821 assert(buffer->refcount == 1); 1822 assert(buffer->msglen <= buffer->msgsize); 1823 assert(buffer->msgorig <= buffer->msg); 1824 assert((buffer->msg && buffer->msglen == strlen(buffer->msg)+1) 1825 || (!buffer->msg && !buffer->msglen)); 1826 if (!buffer->msg && !buffer->sd && !buffer->msgid) 1827 DPRINTF(D_BUFFER, "Empty message?\n"); 1828 1829 /* extract facility and priority level */ 1830 if (buffer->flags & MARK) 1831 fac = LOG_NFACILITIES; 1832 else 1833 fac = LOG_FAC(buffer->pri); 1834 prilev = LOG_PRI(buffer->pri); 1835 1836 /* log the message to the particular outputs */ 1837 if (!Initialized) { 1838 f = &consfile; 1839 f->f_file = open(ctty, O_WRONLY | O_NDELAY, 0); 1840 1841 if (f->f_file >= 0) { 1842 DELREF(f->f_prevmsg); 1843 f->f_prevmsg = NEWREF(buffer); 1844 fprintlog(f, NEWREF(buffer), NULL); 1845 DELREF(buffer); 1846 (void)close(f->f_file); 1847 } 1848 (void)sigsetmask(omask); 1849 return; 1850 } 1851 1852 for (f = Files; f; f = f->f_next) { 1853 char *h; /* host to use for comparing */ 1854 1855 /* skip messages that are incorrect priority */ 1856 if (!MATCH_PRI(f, fac, prilev) 1857 || f->f_pmask[fac] == INTERNAL_NOPRI) 1858 continue; 1859 1860 /* skip messages with the incorrect host name */ 1861 /* compare with host (which is supposedly more correct), */ 1862 /* but fallback to recvhost if host is NULL */ 1863 h = (buffer->host != NULL) ? buffer->host : buffer->recvhost; 1864 if (f->f_host != NULL && h != NULL) { 1865 char shost[MAXHOSTNAMELEN + 1]; 1866 1867 if (BSDOutputFormat) { 1868 (void)strlcpy(shost, h, sizeof(shost)); 1869 trim_anydomain(shost); 1870 h = shost; 1871 } 1872 switch (f->f_host[0]) { 1873 case '+': 1874 if (! matches_spec(h, f->f_host + 1, 1875 strcasestr)) 1876 continue; 1877 break; 1878 case '-': 1879 if (matches_spec(h, f->f_host + 1, 1880 strcasestr)) 1881 continue; 1882 break; 1883 } 1884 } 1885 1886 /* skip messages with the incorrect program name */ 1887 if (f->f_program != NULL && buffer->prog != NULL) { 1888 switch (f->f_program[0]) { 1889 case '+': 1890 if (!matches_spec(buffer->prog, 1891 f->f_program + 1, strstr)) 1892 continue; 1893 break; 1894 case '-': 1895 if (matches_spec(buffer->prog, 1896 f->f_program + 1, strstr)) 1897 continue; 1898 break; 1899 default: 1900 if (!matches_spec(buffer->prog, 1901 f->f_program, strstr)) 1902 continue; 1903 break; 1904 } 1905 } 1906 1907 if (f->f_type == F_CONSOLE && (buffer->flags & IGN_CONS)) 1908 continue; 1909 1910 /* don't output marks to recently written files */ 1911 if ((buffer->flags & MARK) 1912 && (now - f->f_time) < MarkInterval / 2) 1913 continue; 1914 1915 /* 1916 * suppress duplicate lines to this file unless NoRepeat 1917 */ 1918 #define MSG_FIELD_EQ(x) ((!buffer->x && !f->f_prevmsg->x) || \ 1919 (buffer->x && f->f_prevmsg->x && !strcmp(buffer->x, f->f_prevmsg->x))) 1920 1921 if ((buffer->flags & MARK) == 0 && 1922 f->f_prevmsg && 1923 buffer->msglen == f->f_prevmsg->msglen && 1924 !NoRepeat && 1925 MSG_FIELD_EQ(host) && 1926 MSG_FIELD_EQ(sd) && 1927 MSG_FIELD_EQ(msg) 1928 ) { 1929 f->f_prevcount++; 1930 DPRINTF(D_DATA, "Msg repeated %d times, %ld sec of %d\n", 1931 f->f_prevcount, (long)(now - f->f_time), 1932 repeatinterval[f->f_repeatcount]); 1933 /* 1934 * If domark would have logged this by now, 1935 * flush it now (so we don't hold isolated messages), 1936 * but back off so we'll flush less often 1937 * in the future. 1938 */ 1939 if (now > REPEATTIME(f)) { 1940 fprintlog(f, NEWREF(buffer), NULL); 1941 DELREF(buffer); 1942 BACKOFF(f); 1943 } 1944 } else { 1945 /* new line, save it */ 1946 if (f->f_prevcount) 1947 fprintlog(f, NULL, NULL); 1948 f->f_repeatcount = 0; 1949 DELREF(f->f_prevmsg); 1950 f->f_prevmsg = NEWREF(buffer); 1951 fprintlog(f, NEWREF(buffer), NULL); 1952 DELREF(buffer); 1953 } 1954 } 1955 (void)sigsetmask(omask); 1956 } 1957 1958 /* 1959 * format one buffer into output format given by flag BSDOutputFormat 1960 * line is allocated and has to be free()d by caller 1961 * size_t pointers are optional, if not NULL then they will return 1962 * different lenghts used for formatting and output 1963 */ 1964 #define OUT(x) ((x)?(x):"-") 1965 bool 1966 format_buffer(struct buf_msg *buffer, char **line, size_t *ptr_linelen, 1967 size_t *ptr_msglen, size_t *ptr_tlsprefixlen, size_t *ptr_prilen) 1968 { 1969 #define FPBUFSIZE 30 1970 static char ascii_empty[] = ""; 1971 char fp_buf[FPBUFSIZE] = "\0"; 1972 char *hostname, *shorthostname = NULL; 1973 char *ascii_sd = ascii_empty; 1974 char *ascii_msg = ascii_empty; 1975 size_t linelen, msglen, tlsprefixlen, prilen, j; 1976 1977 DPRINTF(D_CALL, "format_buffer(%p)\n", buffer); 1978 if (!buffer) return false; 1979 1980 /* All buffer fields are set with strdup(). To avoid problems 1981 * on memory exhaustion we allow them to be empty and replace 1982 * the essential fields with already allocated generic values. 1983 */ 1984 if (!buffer->timestamp) 1985 buffer->timestamp = timestamp; 1986 if (!buffer->host && !buffer->recvhost) 1987 buffer->host = LocalFQDN; 1988 1989 if (LogFacPri) { 1990 const char *f_s = NULL, *p_s = NULL; 1991 int fac = buffer->pri & LOG_FACMASK; 1992 int pri = LOG_PRI(buffer->pri); 1993 char f_n[5], p_n[5]; 1994 1995 if (LogFacPri > 1) { 1996 CODE *c; 1997 1998 for (c = facilitynames; c->c_name != NULL; c++) { 1999 if (c->c_val == fac) { 2000 f_s = c->c_name; 2001 break; 2002 } 2003 } 2004 for (c = prioritynames; c->c_name != NULL; c++) { 2005 if (c->c_val == pri) { 2006 p_s = c->c_name; 2007 break; 2008 } 2009 } 2010 } 2011 if (f_s == NULL) { 2012 snprintf(f_n, sizeof(f_n), "%d", LOG_FAC(fac)); 2013 f_s = f_n; 2014 } 2015 if (p_s == NULL) { 2016 snprintf(p_n, sizeof(p_n), "%d", pri); 2017 p_s = p_n; 2018 } 2019 snprintf(fp_buf, sizeof(fp_buf), "<%s.%s>", f_s, p_s); 2020 } 2021 2022 /* hostname or FQDN */ 2023 hostname = (buffer->host ? buffer->host : buffer->recvhost); 2024 if (BSDOutputFormat 2025 && (shorthostname = strdup(hostname))) { 2026 /* if the previous BSD output format with "host [recvhost]:" 2027 * gets implemented, this is the right place to distinguish 2028 * between buffer->host and buffer->recvhost 2029 */ 2030 trim_anydomain(shorthostname); 2031 hostname = shorthostname; 2032 } 2033 2034 /* new message formatting: 2035 * instead of using iov always assemble one complete TLS-ready line 2036 * with length and priority (depending on BSDOutputFormat either in 2037 * BSD Syslog or syslog-protocol format) 2038 * 2039 * additionally save the length of the prefixes, 2040 * so UDP destinations can skip the length prefix and 2041 * file/pipe/wall destinations can omit length and priority 2042 */ 2043 /* first determine required space */ 2044 if (BSDOutputFormat) { 2045 /* only output ASCII chars */ 2046 if (buffer->sd) 2047 ascii_sd = copy_utf8_ascii(buffer->sd, 2048 strlen(buffer->sd)); 2049 if (buffer->msg) { 2050 if (IS_BOM(buffer->msg)) 2051 ascii_msg = copy_utf8_ascii(buffer->msg, 2052 buffer->msglen - 1); 2053 else /* assume already converted at input */ 2054 ascii_msg = buffer->msg; 2055 } 2056 msglen = snprintf(NULL, 0, "<%d>%s%.15s %s %s%s%s%s: %s%s%s", 2057 buffer->pri, fp_buf, buffer->timestamp, 2058 hostname, OUT(buffer->prog), 2059 buffer->pid ? "[" : "", 2060 buffer->pid ? buffer->pid : "", 2061 buffer->pid ? "]" : "", ascii_sd, 2062 (buffer->sd && buffer->msg ? " ": ""), ascii_msg); 2063 } else 2064 msglen = snprintf(NULL, 0, "<%d>1 %s%s %s %s %s %s %s%s%s", 2065 buffer->pri, fp_buf, buffer->timestamp, 2066 hostname, OUT(buffer->prog), OUT(buffer->pid), 2067 OUT(buffer->msgid), OUT(buffer->sd), 2068 (buffer->msg ? " ": ""), 2069 (buffer->msg ? buffer->msg: "")); 2070 /* add space for length prefix */ 2071 tlsprefixlen = 0; 2072 for (j = msglen; j; j /= 10) 2073 tlsprefixlen++; 2074 /* one more for the space */ 2075 tlsprefixlen++; 2076 2077 prilen = snprintf(NULL, 0, "<%d>", buffer->pri); 2078 if (!BSDOutputFormat) 2079 prilen += 2; /* version char and space */ 2080 MALLOC(*line, msglen + tlsprefixlen + 1); 2081 if (BSDOutputFormat) 2082 linelen = snprintf(*line, 2083 msglen + tlsprefixlen + 1, 2084 "%zu <%d>%s%.15s %s %s%s%s%s: %s%s%s", 2085 msglen, buffer->pri, fp_buf, buffer->timestamp, 2086 hostname, OUT(buffer->prog), 2087 (buffer->pid ? "[" : ""), 2088 (buffer->pid ? buffer->pid : ""), 2089 (buffer->pid ? "]" : ""), ascii_sd, 2090 (buffer->sd && buffer->msg ? " ": ""), ascii_msg); 2091 else 2092 linelen = snprintf(*line, 2093 msglen + tlsprefixlen + 1, 2094 "%zu <%d>1 %s%s %s %s %s %s %s%s%s", 2095 msglen, buffer->pri, fp_buf, buffer->timestamp, 2096 hostname, OUT(buffer->prog), OUT(buffer->pid), 2097 OUT(buffer->msgid), OUT(buffer->sd), 2098 (buffer->msg ? " ": ""), 2099 (buffer->msg ? buffer->msg: "")); 2100 DPRINTF(D_DATA, "formatted %zu octets to: '%.*s' (linelen %zu, " 2101 "msglen %zu, tlsprefixlen %zu, prilen %zu)\n", linelen, 2102 (int)linelen, *line, linelen, msglen, tlsprefixlen, prilen); 2103 2104 FREEPTR(shorthostname); 2105 if (ascii_sd != ascii_empty) 2106 FREEPTR(ascii_sd); 2107 if (ascii_msg != ascii_empty && ascii_msg != buffer->msg) 2108 FREEPTR(ascii_msg); 2109 2110 if (ptr_linelen) *ptr_linelen = linelen; 2111 if (ptr_msglen) *ptr_msglen = msglen; 2112 if (ptr_tlsprefixlen) *ptr_tlsprefixlen = tlsprefixlen; 2113 if (ptr_prilen) *ptr_prilen = prilen; 2114 return true; 2115 } 2116 2117 /* 2118 * if qentry == NULL: new message, if temporarily undeliverable it will be enqueued 2119 * if qentry != NULL: a temporarily undeliverable message will not be enqueued, 2120 * but after delivery be removed from the queue 2121 */ 2122 void 2123 fprintlog(struct filed *f, struct buf_msg *passedbuffer, struct buf_queue *qentry) 2124 { 2125 static char crnl[] = "\r\n"; 2126 struct buf_msg *buffer = passedbuffer; 2127 struct iovec iov[4]; 2128 struct iovec *v = iov; 2129 bool error = false; 2130 int e = 0, len = 0; 2131 size_t msglen, linelen, tlsprefixlen, prilen; 2132 char *p, *line = NULL, *lineptr = NULL; 2133 #ifndef DISABLE_SIGN 2134 bool newhash = false; 2135 #endif 2136 #define REPBUFSIZE 80 2137 char greetings[200]; 2138 #define ADDEV() do { v++; assert((size_t)(v - iov) < A_CNT(iov)); } while(/*CONSTCOND*/0) 2139 2140 DPRINTF(D_CALL, "fprintlog(%p, %p, %p)\n", f, buffer, qentry); 2141 2142 f->f_time = now; 2143 2144 /* increase refcount here and lower again at return. 2145 * this enables the buffer in the else branch to be freed 2146 * --> every branch needs one NEWREF() or buf_msg_new()! */ 2147 if (buffer) { 2148 (void)NEWREF(buffer); 2149 } else { 2150 if (f->f_prevcount > 1) { 2151 /* possible syslog-sign incompatibility: 2152 * assume destinations f1 and f2 share one SG and 2153 * get the same message sequence. 2154 * 2155 * now both f1 and f2 generate "repeated" messages 2156 * "repeated" messages are different due to different 2157 * timestamps 2158 * the SG will get hashes for the two "repeated" messages 2159 * 2160 * now both f1 and f2 are just fine, but a verification 2161 * will report that each 'lost' a message, i.e. the 2162 * other's "repeated" message 2163 * 2164 * conditions for 'safe configurations': 2165 * - use NoRepeat option, 2166 * - use SG 3, or 2167 * - have exactly one destination for every PRI 2168 */ 2169 buffer = buf_msg_new(REPBUFSIZE); 2170 buffer->msglen = snprintf(buffer->msg, REPBUFSIZE, 2171 "last message repeated %d times", f->f_prevcount); 2172 buffer->timestamp = make_timestamp(NULL, 2173 !BSDOutputFormat, 0); 2174 buffer->pri = f->f_prevmsg->pri; 2175 buffer->host = LocalFQDN; 2176 buffer->prog = appname; 2177 buffer->pid = include_pid; 2178 2179 } else { 2180 buffer = NEWREF(f->f_prevmsg); 2181 } 2182 } 2183 2184 /* no syslog-sign messages to tty/console/... */ 2185 if ((buffer->flags & SIGN_MSG) 2186 && ((f->f_type == F_UNUSED) 2187 || (f->f_type == F_TTY) 2188 || (f->f_type == F_CONSOLE) 2189 || (f->f_type == F_USERS) 2190 || (f->f_type == F_WALL) 2191 || (f->f_type == F_FIFO))) { 2192 DELREF(buffer); 2193 return; 2194 } 2195 2196 /* buffering works only for few types */ 2197 if (qentry 2198 && (f->f_type != F_TLS) 2199 && (f->f_type != F_PIPE) 2200 && (f->f_type != F_FILE) 2201 && (f->f_type != F_FIFO)) { 2202 errno = 0; 2203 logerror("Warning: unexpected message type %d in buffer", 2204 f->f_type); 2205 DELREF(buffer); 2206 return; 2207 } 2208 2209 if (!format_buffer(buffer, &line, 2210 &linelen, &msglen, &tlsprefixlen, &prilen)) { 2211 DPRINTF(D_CALL, "format_buffer() failed, skip message\n"); 2212 DELREF(buffer); 2213 return; 2214 } 2215 /* assert maximum message length */ 2216 if (TypeInfo[f->f_type].max_msg_length != -1 2217 && (size_t)TypeInfo[f->f_type].max_msg_length 2218 < linelen - tlsprefixlen - prilen) { 2219 linelen = TypeInfo[f->f_type].max_msg_length 2220 + tlsprefixlen + prilen; 2221 DPRINTF(D_DATA, "truncating oversized message to %zu octets\n", 2222 linelen); 2223 } 2224 2225 #ifndef DISABLE_SIGN 2226 /* keep state between appending the hash (before buffer is sent) 2227 * and possibly sending a SB (after buffer is sent): */ 2228 /* get hash */ 2229 if (!(buffer->flags & SIGN_MSG) && !qentry) { 2230 char *hash = NULL; 2231 struct signature_group_t *sg; 2232 2233 if ((sg = sign_get_sg(buffer->pri, f)) != NULL) { 2234 if (sign_msg_hash(line + tlsprefixlen, &hash)) 2235 newhash = sign_append_hash(hash, sg); 2236 else 2237 DPRINTF(D_SIGN, 2238 "Unable to hash line \"%s\"\n", line); 2239 } 2240 } 2241 #endif /* !DISABLE_SIGN */ 2242 2243 /* set start and length of buffer and/or fill iovec */ 2244 switch (f->f_type) { 2245 case F_UNUSED: 2246 /* nothing */ 2247 break; 2248 case F_TLS: 2249 /* nothing, as TLS uses whole buffer to send */ 2250 lineptr = line; 2251 len = linelen; 2252 break; 2253 case F_FORW: 2254 lineptr = line + tlsprefixlen; 2255 len = linelen - tlsprefixlen; 2256 break; 2257 case F_PIPE: 2258 case F_FIFO: 2259 case F_FILE: /* fallthrough */ 2260 if (f->f_flags & FFLAG_FULL) { 2261 v->iov_base = line + tlsprefixlen; 2262 v->iov_len = linelen - tlsprefixlen; 2263 } else { 2264 v->iov_base = line + tlsprefixlen + prilen; 2265 v->iov_len = linelen - tlsprefixlen - prilen; 2266 } 2267 ADDEV(); 2268 v->iov_base = &crnl[1]; 2269 v->iov_len = 1; 2270 ADDEV(); 2271 break; 2272 case F_CONSOLE: 2273 case F_TTY: 2274 /* filter non-ASCII */ 2275 p = line; 2276 while (*p) { 2277 *p = FORCE2ASCII(*p); 2278 p++; 2279 } 2280 v->iov_base = line + tlsprefixlen + prilen; 2281 v->iov_len = linelen - tlsprefixlen - prilen; 2282 ADDEV(); 2283 v->iov_base = crnl; 2284 v->iov_len = 2; 2285 ADDEV(); 2286 break; 2287 case F_WALL: 2288 v->iov_base = greetings; 2289 v->iov_len = snprintf(greetings, sizeof(greetings), 2290 "\r\n\7Message from syslogd@%s at %s ...\r\n", 2291 (buffer->host ? buffer->host : buffer->recvhost), 2292 buffer->timestamp); 2293 ADDEV(); 2294 case F_USERS: /* fallthrough */ 2295 /* filter non-ASCII */ 2296 p = line; 2297 while (*p) { 2298 *p = FORCE2ASCII(*p); 2299 p++; 2300 } 2301 v->iov_base = line + tlsprefixlen + prilen; 2302 v->iov_len = linelen - tlsprefixlen - prilen; 2303 ADDEV(); 2304 v->iov_base = &crnl[1]; 2305 v->iov_len = 1; 2306 ADDEV(); 2307 break; 2308 } 2309 2310 /* send */ 2311 switch (f->f_type) { 2312 case F_UNUSED: 2313 DPRINTF(D_MISC, "Logging to %s\n", TypeInfo[f->f_type].name); 2314 break; 2315 2316 case F_FORW: 2317 DPRINTF(D_MISC, "Logging to %s %s\n", 2318 TypeInfo[f->f_type].name, f->f_un.f_forw.f_hname); 2319 udp_send(f, lineptr, len); 2320 break; 2321 2322 #ifndef DISABLE_TLS 2323 case F_TLS: 2324 DPRINTF(D_MISC, "Logging to %s %s\n", 2325 TypeInfo[f->f_type].name, 2326 f->f_un.f_tls.tls_conn->hostname); 2327 /* make sure every message gets queued once 2328 * it will be removed when sendmsg is sent and free()d */ 2329 if (!qentry) 2330 qentry = message_queue_add(f, NEWREF(buffer)); 2331 (void)tls_send(f, lineptr, len, qentry); 2332 break; 2333 #endif /* !DISABLE_TLS */ 2334 2335 case F_PIPE: 2336 DPRINTF(D_MISC, "Logging to %s %s\n", 2337 TypeInfo[f->f_type].name, f->f_un.f_pipe.f_pname); 2338 if (f->f_un.f_pipe.f_pid == 0) { 2339 /* (re-)open */ 2340 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname, 2341 &f->f_un.f_pipe.f_pid)) < 0) { 2342 f->f_type = F_UNUSED; 2343 logerror("%s", f->f_un.f_pipe.f_pname); 2344 message_queue_freeall(f); 2345 break; 2346 } else if (!qentry) /* prevent recursion */ 2347 SEND_QUEUE(f); 2348 } 2349 if (writev(f->f_file, iov, v - iov) < 0) { 2350 e = errno; 2351 if (f->f_un.f_pipe.f_pid > 0) { 2352 (void) close(f->f_file); 2353 deadq_enter(f->f_un.f_pipe.f_pid, 2354 f->f_un.f_pipe.f_pname); 2355 } 2356 f->f_un.f_pipe.f_pid = 0; 2357 /* 2358 * If the error was EPIPE, then what is likely 2359 * has happened is we have a command that is 2360 * designed to take a single message line and 2361 * then exit, but we tried to feed it another 2362 * one before we reaped the child and thus 2363 * reset our state. 2364 * 2365 * Well, now we've reset our state, so try opening 2366 * the pipe and sending the message again if EPIPE 2367 * was the error. 2368 */ 2369 if (e == EPIPE) { 2370 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname, 2371 &f->f_un.f_pipe.f_pid)) < 0) { 2372 f->f_type = F_UNUSED; 2373 logerror("%s", f->f_un.f_pipe.f_pname); 2374 message_queue_freeall(f); 2375 break; 2376 } 2377 if (writev(f->f_file, iov, v - iov) < 0) { 2378 e = errno; 2379 if (f->f_un.f_pipe.f_pid > 0) { 2380 (void) close(f->f_file); 2381 deadq_enter(f->f_un.f_pipe.f_pid, 2382 f->f_un.f_pipe.f_pname); 2383 } 2384 f->f_un.f_pipe.f_pid = 0; 2385 error = true; /* enqueue on return */ 2386 } else 2387 e = 0; 2388 } 2389 if (e != 0 && !error) { 2390 errno = e; 2391 logerror("%s", f->f_un.f_pipe.f_pname); 2392 } 2393 } 2394 if (e == 0 && qentry) { /* sent buffered msg */ 2395 message_queue_remove(f, qentry); 2396 } 2397 break; 2398 2399 case F_CONSOLE: 2400 if (buffer->flags & IGN_CONS) { 2401 DPRINTF(D_MISC, "Logging to %s (ignored)\n", 2402 TypeInfo[f->f_type].name); 2403 break; 2404 } 2405 /* FALLTHROUGH */ 2406 2407 case F_TTY: 2408 case F_FILE: 2409 DPRINTF(D_MISC, "Logging to %s %s\n", 2410 TypeInfo[f->f_type].name, f->f_un.f_fname); 2411 again: 2412 if ((f->f_type == F_FILE ? writev(f->f_file, iov, v - iov) : 2413 writev1(f->f_file, iov, v - iov)) < 0) { 2414 e = errno; 2415 if (f->f_type == F_FILE && e == ENOSPC) { 2416 int lasterror = f->f_lasterror; 2417 f->f_lasterror = e; 2418 if (lasterror != e) 2419 logerror("%s", f->f_un.f_fname); 2420 error = true; /* enqueue on return */ 2421 } 2422 (void)close(f->f_file); 2423 /* 2424 * Check for errors on TTY's due to loss of tty 2425 */ 2426 if ((e == EIO || e == EBADF) && f->f_type != F_FILE) { 2427 f->f_file = open(f->f_un.f_fname, 2428 O_WRONLY|O_APPEND|O_NONBLOCK, 0); 2429 if (f->f_file < 0) { 2430 f->f_type = F_UNUSED; 2431 logerror("%s", f->f_un.f_fname); 2432 message_queue_freeall(f); 2433 } else 2434 goto again; 2435 } else { 2436 f->f_type = F_UNUSED; 2437 errno = e; 2438 f->f_lasterror = e; 2439 logerror("%s", f->f_un.f_fname); 2440 message_queue_freeall(f); 2441 } 2442 } else { 2443 f->f_lasterror = 0; 2444 if ((buffer->flags & SYNC_FILE) 2445 && (f->f_flags & FFLAG_SYNC)) 2446 (void)fsync(f->f_file); 2447 /* Problem with files: We cannot check beforehand if 2448 * they would be writeable and call send_queue() first. 2449 * So we call send_queue() after a successful write, 2450 * which means the first message will be out of order. 2451 */ 2452 if (!qentry) /* prevent recursion */ 2453 SEND_QUEUE(f); 2454 else if (qentry) /* sent buffered msg */ 2455 message_queue_remove(f, qentry); 2456 } 2457 break; 2458 2459 case F_FIFO: 2460 DPRINTF(D_MISC, "Logging to %s %s\n", 2461 TypeInfo[f->f_type].name, f->f_un.f_fname); 2462 if (f->f_file < 0) { 2463 f->f_file = 2464 open(f->f_un.f_fname, O_WRONLY|O_NONBLOCK, 0); 2465 e = errno; 2466 if (f->f_file < 0 && e == ENXIO) { 2467 /* Drop messages with no reader */ 2468 if (qentry) 2469 message_queue_remove(f, qentry); 2470 break; 2471 } 2472 } 2473 2474 if (f->f_file >= 0 && writev(f->f_file, iov, v - iov) < 0) { 2475 e = errno; 2476 2477 /* Enqueue if the fifo buffer is full */ 2478 if (e == EAGAIN) { 2479 if (f->f_lasterror != e) 2480 logerror("%s", f->f_un.f_fname); 2481 f->f_lasterror = e; 2482 error = true; /* enqueue on return */ 2483 break; 2484 } 2485 2486 close(f->f_file); 2487 f->f_file = -1; 2488 2489 /* Drop messages with no reader */ 2490 if (e == EPIPE) { 2491 if (qentry) 2492 message_queue_remove(f, qentry); 2493 break; 2494 } 2495 } 2496 2497 if (f->f_file < 0) { 2498 f->f_type = F_UNUSED; 2499 errno = e; 2500 f->f_lasterror = e; 2501 logerror("%s", f->f_un.f_fname); 2502 message_queue_freeall(f); 2503 break; 2504 } 2505 2506 f->f_lasterror = 0; 2507 if (!qentry) /* prevent recursion (see comment for F_FILE) */ 2508 SEND_QUEUE(f); 2509 if (qentry) /* sent buffered msg */ 2510 message_queue_remove(f, qentry); 2511 break; 2512 2513 case F_USERS: 2514 case F_WALL: 2515 DPRINTF(D_MISC, "Logging to %s\n", TypeInfo[f->f_type].name); 2516 wallmsg(f, iov, v - iov); 2517 break; 2518 } 2519 f->f_prevcount = 0; 2520 2521 if (error && !qentry) 2522 message_queue_add(f, NEWREF(buffer)); 2523 #ifndef DISABLE_SIGN 2524 if (newhash) { 2525 struct signature_group_t *sg; 2526 sg = sign_get_sg(buffer->pri, f); 2527 (void)sign_send_signature_block(sg, false); 2528 } 2529 #endif /* !DISABLE_SIGN */ 2530 /* this belongs to the ad-hoc buffer at the first if(buffer) */ 2531 DELREF(buffer); 2532 /* TLS frees on its own */ 2533 if (f->f_type != F_TLS) 2534 FREEPTR(line); 2535 } 2536 2537 /* send one line by UDP */ 2538 void 2539 udp_send(struct filed *f, char *line, size_t len) 2540 { 2541 int lsent, fail, retry, j; 2542 struct addrinfo *r; 2543 2544 DPRINTF((D_NET|D_CALL), "udp_send(f=%p, line=\"%s\", " 2545 "len=%zu) to dest.\n", f, line, len); 2546 2547 if (!finet) 2548 return; 2549 2550 lsent = -1; 2551 fail = 0; 2552 assert(f->f_type == F_FORW); 2553 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) { 2554 retry = 0; 2555 for (j = 0; j < finet->fd; j++) { 2556 if (finet[j+1].af != r->ai_family) 2557 continue; 2558 sendagain: 2559 lsent = sendto(finet[j+1].fd, line, len, 0, 2560 r->ai_addr, r->ai_addrlen); 2561 if (lsent == -1) { 2562 switch (errno) { 2563 case ENOBUFS: 2564 /* wait/retry/drop */ 2565 if (++retry < 5) { 2566 usleep(1000); 2567 goto sendagain; 2568 } 2569 break; 2570 case EHOSTDOWN: 2571 case EHOSTUNREACH: 2572 case ENETDOWN: 2573 /* drop */ 2574 break; 2575 default: 2576 /* busted */ 2577 fail++; 2578 break; 2579 } 2580 } else if ((size_t)lsent == len) 2581 break; 2582 } 2583 if ((size_t)lsent != len && fail) { 2584 f->f_type = F_UNUSED; 2585 logerror("sendto() failed"); 2586 } 2587 } 2588 } 2589 2590 /* 2591 * WALLMSG -- Write a message to the world at large 2592 * 2593 * Write the specified message to either the entire 2594 * world, or a list of approved users. 2595 */ 2596 void 2597 wallmsg(struct filed *f, struct iovec *iov, size_t iovcnt) 2598 { 2599 #ifdef __NetBSD_Version__ 2600 static int reenter; /* avoid calling ourselves */ 2601 int i; 2602 char *p; 2603 struct utmpentry *ep; 2604 2605 if (reenter++) 2606 return; 2607 2608 (void)getutentries(NULL, &ep); 2609 /* NOSTRICT */ 2610 for (; ep; ep = ep->next) { 2611 if (f->f_type == F_WALL) { 2612 if ((p = ttymsg(iov, iovcnt, ep->line, TTYMSGTIME)) 2613 != NULL) { 2614 errno = 0; /* already in msg */ 2615 logerror("%s", p); 2616 } 2617 continue; 2618 } 2619 /* should we send the message to this user? */ 2620 for (i = 0; i < MAXUNAMES; i++) { 2621 if (!f->f_un.f_uname[i][0]) 2622 break; 2623 if (strcmp(f->f_un.f_uname[i], ep->name) == 0) { 2624 struct stat st; 2625 char tty[MAXPATHLEN]; 2626 snprintf(tty, sizeof(tty), "%s/%s", _PATH_DEV, 2627 ep->line); 2628 if (stat(tty, &st) != -1 && 2629 (st.st_mode & S_IWGRP) == 0) 2630 break; 2631 2632 if ((p = ttymsg(iov, iovcnt, ep->line, 2633 TTYMSGTIME)) != NULL) { 2634 errno = 0; /* already in msg */ 2635 logerror("%s", p); 2636 } 2637 break; 2638 } 2639 } 2640 } 2641 reenter = 0; 2642 #endif /* __NetBSD_Version__ */ 2643 } 2644 2645 void 2646 /*ARGSUSED*/ 2647 reapchild(int fd, short event, void *ev) 2648 { 2649 int status; 2650 pid_t pid; 2651 struct filed *f; 2652 2653 while ((pid = wait3(&status, WNOHANG, NULL)) > 0) { 2654 if (!Initialized || ShuttingDown) { 2655 /* 2656 * Be silent while we are initializing or 2657 * shutting down. 2658 */ 2659 continue; 2660 } 2661 2662 if (deadq_remove(pid)) 2663 continue; 2664 2665 /* Now, look in the list of active processes. */ 2666 for (f = Files; f != NULL; f = f->f_next) { 2667 if (f->f_type == F_PIPE && 2668 f->f_un.f_pipe.f_pid == pid) { 2669 (void) close(f->f_file); 2670 f->f_un.f_pipe.f_pid = 0; 2671 log_deadchild(pid, status, 2672 f->f_un.f_pipe.f_pname); 2673 break; 2674 } 2675 } 2676 } 2677 } 2678 2679 /* 2680 * Return a printable representation of a host address (FQDN if available) 2681 */ 2682 const char * 2683 cvthname(struct sockaddr_storage *f) 2684 { 2685 int error; 2686 int niflag = NI_DGRAM; 2687 static char host[NI_MAXHOST], ip[NI_MAXHOST]; 2688 2689 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 2690 ip, sizeof ip, NULL, 0, NI_NUMERICHOST|niflag); 2691 2692 DPRINTF(D_CALL, "cvthname(%s)\n", ip); 2693 2694 if (error) { 2695 DPRINTF(D_NET, "Malformed from address %s\n", 2696 gai_strerror(error)); 2697 return "???"; 2698 } 2699 2700 if (!UseNameService) 2701 return ip; 2702 2703 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 2704 host, sizeof host, NULL, 0, niflag); 2705 if (error) { 2706 DPRINTF(D_NET, "Host name for your address (%s) unknown\n", ip); 2707 return ip; 2708 } 2709 2710 return host; 2711 } 2712 2713 void 2714 trim_anydomain(char *host) 2715 { 2716 bool onlydigits = true; 2717 int i; 2718 2719 if (!BSDOutputFormat) 2720 return; 2721 2722 /* if non-digits found, then assume hostname and cut at first dot (this 2723 * case also covers IPv6 addresses which should not contain dots), 2724 * if only digits then assume IPv4 address and do not cut at all */ 2725 for (i = 0; host[i]; i++) { 2726 if (host[i] == '.' && !onlydigits) 2727 host[i] = '\0'; 2728 else if (!isdigit((unsigned char)host[i]) && host[i] != '.') 2729 onlydigits = false; 2730 } 2731 } 2732 2733 static void 2734 /*ARGSUSED*/ 2735 domark(int fd, short event, void *ev) 2736 { 2737 struct event *ev_pass = (struct event *)ev; 2738 struct filed *f; 2739 dq_t q, nextq; 2740 sigset_t newmask, omask; 2741 2742 schedule_event(&ev_pass, 2743 &((struct timeval){TIMERINTVL, 0}), 2744 domark, ev_pass); 2745 DPRINTF((D_CALL|D_EVENT), "domark()\n"); 2746 2747 BLOCK_SIGNALS(omask, newmask); 2748 now = time(NULL); 2749 MarkSeq += TIMERINTVL; 2750 if (MarkSeq >= MarkInterval) { 2751 logmsg_async(LOG_INFO, NULL, "-- MARK --", ADDDATE|MARK); 2752 MarkSeq = 0; 2753 } 2754 2755 for (f = Files; f; f = f->f_next) { 2756 if (f->f_prevcount && now >= REPEATTIME(f)) { 2757 DPRINTF(D_DATA, "Flush %s: repeated %d times, %d sec.\n", 2758 TypeInfo[f->f_type].name, f->f_prevcount, 2759 repeatinterval[f->f_repeatcount]); 2760 fprintlog(f, NULL, NULL); 2761 BACKOFF(f); 2762 } 2763 } 2764 message_allqueues_check(); 2765 RESTORE_SIGNALS(omask); 2766 2767 /* Walk the dead queue, and see if we should signal somebody. */ 2768 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = nextq) { 2769 nextq = TAILQ_NEXT(q, dq_entries); 2770 switch (q->dq_timeout) { 2771 case 0: 2772 /* Already signalled once, try harder now. */ 2773 if (kill(q->dq_pid, SIGKILL) != 0) 2774 (void) deadq_remove(q->dq_pid); 2775 break; 2776 2777 case 1: 2778 /* 2779 * Timed out on the dead queue, send terminate 2780 * signal. Note that we leave the removal from 2781 * the dead queue to reapchild(), which will 2782 * also log the event (unless the process 2783 * didn't even really exist, in case we simply 2784 * drop it from the dead queue). 2785 */ 2786 if (kill(q->dq_pid, SIGTERM) != 0) { 2787 (void) deadq_remove(q->dq_pid); 2788 break; 2789 } 2790 /* FALLTHROUGH */ 2791 2792 default: 2793 q->dq_timeout--; 2794 } 2795 } 2796 #ifndef DISABLE_SIGN 2797 if (GlobalSign.rsid) { /* check if initialized */ 2798 struct signature_group_t *sg; 2799 STAILQ_FOREACH(sg, &GlobalSign.SigGroups, entries) { 2800 sign_send_certificate_block(sg); 2801 } 2802 } 2803 #endif /* !DISABLE_SIGN */ 2804 } 2805 2806 /* 2807 * Print syslogd errors some place. 2808 */ 2809 void 2810 logerror(const char *fmt, ...) 2811 { 2812 static int logerror_running; 2813 va_list ap; 2814 char tmpbuf[BUFSIZ]; 2815 char buf[BUFSIZ]; 2816 char *outbuf; 2817 2818 /* If there's an error while trying to log an error, give up. */ 2819 if (logerror_running) 2820 return; 2821 logerror_running = 1; 2822 2823 va_start(ap, fmt); 2824 (void)vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap); 2825 va_end(ap); 2826 2827 if (errno) { 2828 (void)snprintf(buf, sizeof(buf), "%s: %s", 2829 tmpbuf, strerror(errno)); 2830 outbuf = buf; 2831 } else { 2832 (void)snprintf(buf, sizeof(buf), "%s", tmpbuf); 2833 outbuf = tmpbuf; 2834 } 2835 2836 if (daemonized) 2837 logmsg_async(LOG_SYSLOG|LOG_ERR, NULL, outbuf, ADDDATE); 2838 if (!daemonized && Debug) 2839 DPRINTF(D_MISC, "%s\n", outbuf); 2840 if (!daemonized && !Debug) 2841 printf("%s\n", outbuf); 2842 2843 logerror_running = 0; 2844 } 2845 2846 /* 2847 * Print syslogd info some place. 2848 */ 2849 void 2850 loginfo(const char *fmt, ...) 2851 { 2852 va_list ap; 2853 char buf[BUFSIZ]; 2854 2855 va_start(ap, fmt); 2856 (void)vsnprintf(buf, sizeof(buf), fmt, ap); 2857 va_end(ap); 2858 2859 DPRINTF(D_MISC, "%s\n", buf); 2860 logmsg_async(LOG_SYSLOG|LOG_INFO, NULL, buf, ADDDATE); 2861 } 2862 2863 #ifndef DISABLE_TLS 2864 static inline void 2865 free_incoming_tls_sockets(void) 2866 { 2867 struct TLS_Incoming_Conn *tls_in; 2868 int i; 2869 2870 /* 2871 * close all listening and connected TLS sockets 2872 */ 2873 if (TLS_Listen_Set) 2874 for (i = 0; i < TLS_Listen_Set->fd; i++) { 2875 if (close(TLS_Listen_Set[i+1].fd) == -1) 2876 logerror("close() failed"); 2877 DEL_EVENT(TLS_Listen_Set[i+1].ev); 2878 FREEPTR(TLS_Listen_Set[i+1].ev); 2879 } 2880 FREEPTR(TLS_Listen_Set); 2881 /* close/free incoming TLS connections */ 2882 while (!SLIST_EMPTY(&TLS_Incoming_Head)) { 2883 tls_in = SLIST_FIRST(&TLS_Incoming_Head); 2884 SLIST_REMOVE_HEAD(&TLS_Incoming_Head, entries); 2885 FREEPTR(tls_in->inbuf); 2886 free_tls_conn(tls_in->tls_conn); 2887 free(tls_in); 2888 } 2889 } 2890 #endif /* !DISABLE_TLS */ 2891 2892 void 2893 /*ARGSUSED*/ 2894 die(int fd, short event, void *ev) 2895 { 2896 struct filed *f, *next; 2897 char **p; 2898 sigset_t newmask, omask; 2899 int i; 2900 size_t j; 2901 2902 ShuttingDown = 1; /* Don't log SIGCHLDs. */ 2903 /* prevent recursive signals */ 2904 BLOCK_SIGNALS(omask, newmask); 2905 2906 errno = 0; 2907 if (ev != NULL) 2908 logerror("Exiting on signal %d", fd); 2909 else 2910 logerror("Fatal error, exiting"); 2911 2912 /* 2913 * flush any pending output 2914 */ 2915 for (f = Files; f != NULL; f = f->f_next) { 2916 /* flush any pending output */ 2917 if (f->f_prevcount) 2918 fprintlog(f, NULL, NULL); 2919 SEND_QUEUE(f); 2920 } 2921 2922 #ifndef DISABLE_TLS 2923 free_incoming_tls_sockets(); 2924 #endif /* !DISABLE_TLS */ 2925 #ifndef DISABLE_SIGN 2926 sign_global_free(); 2927 #endif /* !DISABLE_SIGN */ 2928 2929 /* 2930 * Close all open log files. 2931 */ 2932 for (f = Files; f != NULL; f = next) { 2933 message_queue_freeall(f); 2934 2935 switch (f->f_type) { 2936 case F_FILE: 2937 case F_TTY: 2938 case F_CONSOLE: 2939 case F_FIFO: 2940 if (f->f_file >= 0) 2941 (void)close(f->f_file); 2942 break; 2943 case F_PIPE: 2944 if (f->f_un.f_pipe.f_pid > 0) { 2945 (void)close(f->f_file); 2946 } 2947 f->f_un.f_pipe.f_pid = 0; 2948 break; 2949 case F_FORW: 2950 if (f->f_un.f_forw.f_addr) 2951 freeaddrinfo(f->f_un.f_forw.f_addr); 2952 break; 2953 #ifndef DISABLE_TLS 2954 case F_TLS: 2955 free_tls_conn(f->f_un.f_tls.tls_conn); 2956 break; 2957 #endif /* !DISABLE_TLS */ 2958 } 2959 next = f->f_next; 2960 DELREF(f->f_prevmsg); 2961 FREEPTR(f->f_program); 2962 FREEPTR(f->f_host); 2963 DEL_EVENT(f->f_sq_event); 2964 free((char *)f); 2965 } 2966 2967 /* 2968 * Close all open UDP sockets 2969 */ 2970 if (finet) { 2971 for (i = 0; i < finet->fd; i++) { 2972 if (close(finet[i+1].fd) < 0) { 2973 logerror("close() failed"); 2974 die(0, 0, NULL); 2975 } 2976 DEL_EVENT(finet[i+1].ev); 2977 FREEPTR(finet[i+1].ev); 2978 } 2979 FREEPTR(finet); 2980 } 2981 2982 /* free config options */ 2983 for (j = 0; j < A_CNT(TypeInfo); j++) { 2984 FREEPTR(TypeInfo[j].queue_length_string); 2985 FREEPTR(TypeInfo[j].queue_size_string); 2986 } 2987 2988 #ifndef DISABLE_TLS 2989 FREEPTR(tls_opt.CAdir); 2990 FREEPTR(tls_opt.CAfile); 2991 FREEPTR(tls_opt.keyfile); 2992 FREEPTR(tls_opt.certfile); 2993 FREEPTR(tls_opt.x509verify); 2994 FREEPTR(tls_opt.bindhost); 2995 FREEPTR(tls_opt.bindport); 2996 FREEPTR(tls_opt.server); 2997 FREEPTR(tls_opt.gen_cert); 2998 free_cred_SLIST(&tls_opt.cert_head); 2999 free_cred_SLIST(&tls_opt.fprint_head); 3000 FREE_SSL_CTX(tls_opt.global_TLS_CTX); 3001 #endif /* !DISABLE_TLS */ 3002 3003 FREEPTR(funix); 3004 for (p = LogPaths; p && *p; p++) 3005 unlink(*p); 3006 exit(0); 3007 } 3008 3009 #ifndef DISABLE_SIGN 3010 /* 3011 * get one "sign_delim_sg2" item, convert and store in ordered queue 3012 */ 3013 void 3014 store_sign_delim_sg2(char *tmp_buf) 3015 { 3016 struct string_queue *sqentry, *sqe1, *sqe2; 3017 3018 if(!(sqentry = malloc(sizeof(*sqentry)))) { 3019 logerror("Unable to allocate memory"); 3020 return; 3021 } 3022 /*LINTED constcond/null effect */ 3023 assert(sizeof(int64_t) == sizeof(uint_fast64_t)); 3024 if (dehumanize_number(tmp_buf, (int64_t*) &(sqentry->key)) == -1 3025 || sqentry->key > (LOG_NFACILITIES<<3)) { 3026 DPRINTF(D_PARSE, "invalid sign_delim_sg2: %s\n", tmp_buf); 3027 free(sqentry); 3028 FREEPTR(tmp_buf); 3029 return; 3030 } 3031 sqentry->data = tmp_buf; 3032 3033 if (STAILQ_EMPTY(&GlobalSign.sig2_delims)) { 3034 STAILQ_INSERT_HEAD(&GlobalSign.sig2_delims, 3035 sqentry, entries); 3036 return; 3037 } 3038 3039 /* keep delimiters sorted */ 3040 sqe1 = sqe2 = STAILQ_FIRST(&GlobalSign.sig2_delims); 3041 if (sqe1->key > sqentry->key) { 3042 STAILQ_INSERT_HEAD(&GlobalSign.sig2_delims, 3043 sqentry, entries); 3044 return; 3045 } 3046 3047 while ((sqe1 = sqe2) 3048 && (sqe2 = STAILQ_NEXT(sqe1, entries))) { 3049 if (sqe2->key > sqentry->key) { 3050 break; 3051 } else if (sqe2->key == sqentry->key) { 3052 DPRINTF(D_PARSE, "duplicate sign_delim_sg2: %s\n", 3053 tmp_buf); 3054 FREEPTR(sqentry); 3055 FREEPTR(tmp_buf); 3056 return; 3057 } 3058 } 3059 STAILQ_INSERT_AFTER(&GlobalSign.sig2_delims, sqe1, sqentry, entries); 3060 } 3061 #endif /* !DISABLE_SIGN */ 3062 3063 /* 3064 * read syslog.conf 3065 */ 3066 void 3067 read_config_file(FILE *cf, struct filed **f_ptr) 3068 { 3069 size_t linenum = 0; 3070 size_t i; 3071 struct filed *f, **nextp; 3072 char cline[LINE_MAX]; 3073 char prog[NAME_MAX + 1]; 3074 char host[MAXHOSTNAMELEN]; 3075 const char *p; 3076 char *q; 3077 bool found_keyword; 3078 #ifndef DISABLE_TLS 3079 struct peer_cred *cred = NULL; 3080 struct peer_cred_head *credhead = NULL; 3081 #endif /* !DISABLE_TLS */ 3082 #ifndef DISABLE_SIGN 3083 char *sign_sg_str = NULL; 3084 #endif /* !DISABLE_SIGN */ 3085 #if (!defined(DISABLE_TLS) || !defined(DISABLE_SIGN)) 3086 char *tmp_buf = NULL; 3087 #endif /* (!defined(DISABLE_TLS) || !defined(DISABLE_SIGN)) */ 3088 /* central list of recognized configuration keywords 3089 * and an address for their values as strings */ 3090 const struct config_keywords { 3091 const char *keyword; 3092 char **variable; 3093 } config_keywords[] = { 3094 #ifndef DISABLE_TLS 3095 /* TLS settings */ 3096 {"tls_ca", &tls_opt.CAfile}, 3097 {"tls_cadir", &tls_opt.CAdir}, 3098 {"tls_cert", &tls_opt.certfile}, 3099 {"tls_key", &tls_opt.keyfile}, 3100 {"tls_verify", &tls_opt.x509verify}, 3101 {"tls_bindport", &tls_opt.bindport}, 3102 {"tls_bindhost", &tls_opt.bindhost}, 3103 {"tls_server", &tls_opt.server}, 3104 {"tls_gen_cert", &tls_opt.gen_cert}, 3105 /* special cases in parsing */ 3106 {"tls_allow_fingerprints",&tmp_buf}, 3107 {"tls_allow_clientcerts", &tmp_buf}, 3108 /* buffer settings */ 3109 {"tls_queue_length", &TypeInfo[F_TLS].queue_length_string}, 3110 {"tls_queue_size", &TypeInfo[F_TLS].queue_size_string}, 3111 #endif /* !DISABLE_TLS */ 3112 {"file_queue_length", &TypeInfo[F_FILE].queue_length_string}, 3113 {"pipe_queue_length", &TypeInfo[F_PIPE].queue_length_string}, 3114 {"fifo_queue_length", &TypeInfo[F_FIFO].queue_length_string}, 3115 {"file_queue_size", &TypeInfo[F_FILE].queue_size_string}, 3116 {"pipe_queue_size", &TypeInfo[F_PIPE].queue_size_string}, 3117 {"fifo_queue_size", &TypeInfo[F_FIFO].queue_size_string}, 3118 #ifndef DISABLE_SIGN 3119 /* syslog-sign setting */ 3120 {"sign_sg", &sign_sg_str}, 3121 /* also special case in parsing */ 3122 {"sign_delim_sg2", &tmp_buf}, 3123 #endif /* !DISABLE_SIGN */ 3124 }; 3125 3126 DPRINTF(D_CALL, "read_config_file()\n"); 3127 3128 /* free all previous config options */ 3129 for (i = 0; i < A_CNT(TypeInfo); i++) { 3130 if (TypeInfo[i].queue_length_string 3131 && TypeInfo[i].queue_length_string 3132 != TypeInfo[i].default_length_string) { 3133 FREEPTR(TypeInfo[i].queue_length_string); 3134 TypeInfo[i].queue_length_string = 3135 strdup(TypeInfo[i].default_length_string); 3136 } 3137 if (TypeInfo[i].queue_size_string 3138 && TypeInfo[i].queue_size_string 3139 != TypeInfo[i].default_size_string) { 3140 FREEPTR(TypeInfo[i].queue_size_string); 3141 TypeInfo[i].queue_size_string = 3142 strdup(TypeInfo[i].default_size_string); 3143 } 3144 } 3145 for (i = 0; i < A_CNT(config_keywords); i++) 3146 FREEPTR(*config_keywords[i].variable); 3147 /* 3148 * global settings 3149 */ 3150 while (fgets(cline, sizeof(cline), cf) != NULL) { 3151 linenum++; 3152 for (p = cline; isspace((unsigned char)*p); ++p) 3153 continue; 3154 if ((*p == '\0') || (*p == '#')) 3155 continue; 3156 3157 for (i = 0; i < A_CNT(config_keywords); i++) { 3158 if (copy_config_value(config_keywords[i].keyword, 3159 config_keywords[i].variable, &p, ConfFile, 3160 linenum)) { 3161 DPRINTF((D_PARSE|D_MEM), 3162 "found option %s, saved @%p\n", 3163 config_keywords[i].keyword, 3164 *config_keywords[i].variable); 3165 #ifndef DISABLE_SIGN 3166 if (!strcmp("sign_delim_sg2", 3167 config_keywords[i].keyword)) 3168 do { 3169 store_sign_delim_sg2(tmp_buf); 3170 } while (copy_config_value_word( 3171 &tmp_buf, &p)); 3172 3173 #endif /* !DISABLE_SIGN */ 3174 3175 #ifndef DISABLE_TLS 3176 /* special cases with multiple parameters */ 3177 if (!strcmp("tls_allow_fingerprints", 3178 config_keywords[i].keyword)) 3179 credhead = &tls_opt.fprint_head; 3180 else if (!strcmp("tls_allow_clientcerts", 3181 config_keywords[i].keyword)) 3182 credhead = &tls_opt.cert_head; 3183 3184 if (credhead) do { 3185 if(!(cred = malloc(sizeof(*cred)))) { 3186 logerror("Unable to " 3187 "allocate memory"); 3188 break; 3189 } 3190 cred->data = tmp_buf; 3191 tmp_buf = NULL; 3192 SLIST_INSERT_HEAD(credhead, 3193 cred, entries); 3194 } while /* additional values? */ 3195 (copy_config_value_word(&tmp_buf, &p)); 3196 credhead = NULL; 3197 break; 3198 #endif /* !DISABLE_TLS */ 3199 } 3200 } 3201 } 3202 /* convert strings to integer values */ 3203 for (i = 0; i < A_CNT(TypeInfo); i++) { 3204 if (!TypeInfo[i].queue_length_string 3205 || dehumanize_number(TypeInfo[i].queue_length_string, 3206 &TypeInfo[i].queue_length) == -1) 3207 if (dehumanize_number(TypeInfo[i].default_length_string, 3208 &TypeInfo[i].queue_length) == -1) 3209 abort(); 3210 if (!TypeInfo[i].queue_size_string 3211 || dehumanize_number(TypeInfo[i].queue_size_string, 3212 &TypeInfo[i].queue_size) == -1) 3213 if (dehumanize_number(TypeInfo[i].default_size_string, 3214 &TypeInfo[i].queue_size) == -1) 3215 abort(); 3216 } 3217 3218 #ifndef DISABLE_SIGN 3219 if (sign_sg_str) { 3220 if (sign_sg_str[1] == '\0' 3221 && (sign_sg_str[0] == '0' || sign_sg_str[0] == '1' 3222 || sign_sg_str[0] == '2' || sign_sg_str[0] == '3')) 3223 GlobalSign.sg = sign_sg_str[0] - '0'; 3224 else { 3225 GlobalSign.sg = SIGN_SG; 3226 DPRINTF(D_MISC, "Invalid sign_sg value `%s', " 3227 "use default value `%d'\n", 3228 sign_sg_str, GlobalSign.sg); 3229 } 3230 } else /* disable syslog-sign */ 3231 GlobalSign.sg = -1; 3232 #endif /* !DISABLE_SIGN */ 3233 3234 rewind(cf); 3235 linenum = 0; 3236 /* 3237 * Foreach line in the conf table, open that file. 3238 */ 3239 f = NULL; 3240 nextp = &f; 3241 3242 strcpy(prog, "*"); 3243 strcpy(host, "*"); 3244 while (fgets(cline, sizeof(cline), cf) != NULL) { 3245 linenum++; 3246 found_keyword = false; 3247 /* 3248 * check for end-of-section, comments, strip off trailing 3249 * spaces and newline character. #!prog is treated specially: 3250 * following lines apply only to that program. 3251 */ 3252 for (p = cline; isspace((unsigned char)*p); ++p) 3253 continue; 3254 if (*p == '\0') 3255 continue; 3256 if (*p == '#') { 3257 p++; 3258 if (*p != '!' && *p != '+' && *p != '-') 3259 continue; 3260 } 3261 3262 for (i = 0; i < A_CNT(config_keywords); i++) { 3263 if (!strncasecmp(p, config_keywords[i].keyword, 3264 strlen(config_keywords[i].keyword))) { 3265 DPRINTF(D_PARSE, 3266 "skip cline %zu with keyword %s\n", 3267 linenum, config_keywords[i].keyword); 3268 found_keyword = true; 3269 } 3270 } 3271 if (found_keyword) 3272 continue; 3273 3274 if (*p == '+' || *p == '-') { 3275 host[0] = *p++; 3276 while (isspace((unsigned char)*p)) 3277 p++; 3278 if (*p == '\0' || *p == '*') { 3279 strcpy(host, "*"); 3280 continue; 3281 } 3282 /* the +hostname expression will continue 3283 * to use the LocalHostName, not the FQDN */ 3284 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) { 3285 if (*p == '@') { 3286 (void)strncpy(&host[i], LocalHostName, 3287 sizeof(host) - 1 - i); 3288 host[sizeof(host) - 1] = '\0'; 3289 i = strlen(host) - 1; 3290 p++; 3291 continue; 3292 } 3293 if (!isalnum((unsigned char)*p) && 3294 *p != '.' && *p != '-' && *p != ',') 3295 break; 3296 host[i] = *p++; 3297 } 3298 host[i] = '\0'; 3299 continue; 3300 } 3301 if (*p == '!') { 3302 p++; 3303 while (isspace((unsigned char)*p)) 3304 p++; 3305 if (*p == '\0' || *p == '*') { 3306 strcpy(prog, "*"); 3307 continue; 3308 } 3309 for (i = 0; i < NAME_MAX; i++) { 3310 if (!isprint((unsigned char)p[i])) 3311 break; 3312 prog[i] = p[i]; 3313 } 3314 prog[i] = '\0'; 3315 continue; 3316 } 3317 for (q = strchr(cline, '\0'); isspace((unsigned char)*--q);) 3318 continue; 3319 *++q = '\0'; 3320 if ((f = calloc(1, sizeof(*f))) == NULL) { 3321 logerror("alloc failed"); 3322 die(0, 0, NULL); 3323 } 3324 if (!*f_ptr) *f_ptr = f; /* return first node */ 3325 *nextp = f; 3326 nextp = &f->f_next; 3327 cfline(linenum, cline, f, prog, host); 3328 } 3329 } 3330 3331 /* 3332 * INIT -- Initialize syslogd from configuration table 3333 */ 3334 void 3335 /*ARGSUSED*/ 3336 init(int fd, short event, void *ev) 3337 { 3338 FILE *cf; 3339 int i; 3340 struct filed *f, *newf, **nextp, *f2; 3341 char *p; 3342 sigset_t newmask, omask; 3343 #ifndef DISABLE_TLS 3344 char *tls_status_msg = NULL; 3345 struct peer_cred *cred = NULL; 3346 #endif /* !DISABLE_TLS */ 3347 3348 /* prevent recursive signals */ 3349 BLOCK_SIGNALS(omask, newmask); 3350 3351 DPRINTF((D_EVENT|D_CALL), "init\n"); 3352 3353 /* 3354 * be careful about dependencies and order of actions: 3355 * 1. flush buffer queues 3356 * 2. flush -sign SBs 3357 * 3. flush/delete buffer queue again, in case an SB got there 3358 * 4. close files/connections 3359 */ 3360 3361 /* 3362 * flush any pending output 3363 */ 3364 for (f = Files; f != NULL; f = f->f_next) { 3365 /* flush any pending output */ 3366 if (f->f_prevcount) 3367 fprintlog(f, NULL, NULL); 3368 SEND_QUEUE(f); 3369 } 3370 /* some actions only on SIGHUP and not on first start */ 3371 if (Initialized) { 3372 #ifndef DISABLE_SIGN 3373 sign_global_free(); 3374 #endif /* !DISABLE_SIGN */ 3375 #ifndef DISABLE_TLS 3376 free_incoming_tls_sockets(); 3377 #endif /* !DISABLE_TLS */ 3378 Initialized = 0; 3379 } 3380 /* 3381 * Close all open log files. 3382 */ 3383 for (f = Files; f != NULL; f = f->f_next) { 3384 switch (f->f_type) { 3385 case F_FILE: 3386 case F_TTY: 3387 case F_CONSOLE: 3388 (void)close(f->f_file); 3389 break; 3390 case F_PIPE: 3391 if (f->f_un.f_pipe.f_pid > 0) { 3392 (void)close(f->f_file); 3393 deadq_enter(f->f_un.f_pipe.f_pid, 3394 f->f_un.f_pipe.f_pname); 3395 } 3396 f->f_un.f_pipe.f_pid = 0; 3397 break; 3398 case F_FORW: 3399 if (f->f_un.f_forw.f_addr) 3400 freeaddrinfo(f->f_un.f_forw.f_addr); 3401 break; 3402 #ifndef DISABLE_TLS 3403 case F_TLS: 3404 free_tls_sslptr(f->f_un.f_tls.tls_conn); 3405 break; 3406 #endif /* !DISABLE_TLS */ 3407 } 3408 } 3409 3410 /* 3411 * Close all open UDP sockets 3412 */ 3413 if (finet) { 3414 for (i = 0; i < finet->fd; i++) { 3415 if (close(finet[i+1].fd) < 0) { 3416 logerror("close() failed"); 3417 die(0, 0, NULL); 3418 } 3419 DEL_EVENT(finet[i+1].ev); 3420 FREEPTR(finet[i+1].ev); 3421 } 3422 FREEPTR(finet); 3423 } 3424 3425 /* get FQDN and hostname/domain */ 3426 FREEPTR(oldLocalFQDN); 3427 oldLocalFQDN = LocalFQDN; 3428 LocalFQDN = getLocalFQDN(); 3429 if ((p = strchr(LocalFQDN, '.')) != NULL) 3430 (void)strlcpy(LocalHostName, LocalFQDN, 1+p-LocalFQDN); 3431 else 3432 (void)strlcpy(LocalHostName, LocalFQDN, sizeof(LocalHostName)); 3433 3434 /* 3435 * Reset counter of forwarding actions 3436 */ 3437 3438 NumForwards=0; 3439 3440 /* new destination list to replace Files */ 3441 newf = NULL; 3442 nextp = &newf; 3443 3444 /* open the configuration file */ 3445 if ((cf = fopen(ConfFile, "r")) == NULL) { 3446 DPRINTF(D_FILE, "Cannot open `%s'\n", ConfFile); 3447 *nextp = (struct filed *)calloc(1, sizeof(*f)); 3448 cfline(0, "*.ERR\t/dev/console", *nextp, "*", "*"); 3449 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f)); 3450 cfline(0, "*.PANIC\t*", (*nextp)->f_next, "*", "*"); 3451 Initialized = 1; 3452 RESTORE_SIGNALS(omask); 3453 return; 3454 } 3455 3456 #ifndef DISABLE_TLS 3457 /* init with new TLS_CTX 3458 * as far as I see one cannot change the cert/key of an existing CTX 3459 */ 3460 FREE_SSL_CTX(tls_opt.global_TLS_CTX); 3461 3462 free_cred_SLIST(&tls_opt.cert_head); 3463 free_cred_SLIST(&tls_opt.fprint_head); 3464 #endif /* !DISABLE_TLS */ 3465 3466 /* read and close configuration file */ 3467 read_config_file(cf, &newf); 3468 newf = *nextp; 3469 (void)fclose(cf); 3470 DPRINTF(D_MISC, "read_config_file() returned newf=%p\n", newf); 3471 3472 #define MOVE_QUEUE(dst, src) do { \ 3473 struct buf_queue *buf; \ 3474 STAILQ_CONCAT(&dst->f_qhead, &src->f_qhead); \ 3475 STAILQ_FOREACH(buf, &dst->f_qhead, entries) { \ 3476 dst->f_qelements++; \ 3477 dst->f_qsize += buf_queue_obj_size(buf); \ 3478 } \ 3479 src->f_qsize = 0; \ 3480 src->f_qelements = 0; \ 3481 } while (/*CONSTCOND*/0) 3482 3483 /* 3484 * Free old log files. 3485 */ 3486 for (f = Files; f != NULL;) { 3487 struct filed *ftmp; 3488 3489 /* check if a new logfile is equal, if so pass the queue */ 3490 for (f2 = newf; f2 != NULL; f2 = f2->f_next) { 3491 if (f->f_type == f2->f_type 3492 && ((f->f_type == F_PIPE 3493 && !strcmp(f->f_un.f_pipe.f_pname, 3494 f2->f_un.f_pipe.f_pname)) 3495 #ifndef DISABLE_TLS 3496 || (f->f_type == F_TLS 3497 && !strcmp(f->f_un.f_tls.tls_conn->hostname, 3498 f2->f_un.f_tls.tls_conn->hostname) 3499 && !strcmp(f->f_un.f_tls.tls_conn->port, 3500 f2->f_un.f_tls.tls_conn->port)) 3501 #endif /* !DISABLE_TLS */ 3502 || (f->f_type == F_FORW 3503 && !strcmp(f->f_un.f_forw.f_hname, 3504 f2->f_un.f_forw.f_hname)))) { 3505 DPRINTF(D_BUFFER, "move queue from f@%p " 3506 "to f2@%p\n", f, f2); 3507 MOVE_QUEUE(f2, f); 3508 } 3509 } 3510 message_queue_freeall(f); 3511 DELREF(f->f_prevmsg); 3512 #ifndef DISABLE_TLS 3513 if (f->f_type == F_TLS) 3514 free_tls_conn(f->f_un.f_tls.tls_conn); 3515 #endif /* !DISABLE_TLS */ 3516 FREEPTR(f->f_program); 3517 FREEPTR(f->f_host); 3518 DEL_EVENT(f->f_sq_event); 3519 3520 ftmp = f->f_next; 3521 free((char *)f); 3522 f = ftmp; 3523 } 3524 Files = newf; 3525 Initialized = 1; 3526 3527 if (Debug) { 3528 for (f = Files; f; f = f->f_next) { 3529 for (i = 0; i <= LOG_NFACILITIES; i++) 3530 if (f->f_pmask[i] == INTERNAL_NOPRI) 3531 printf("X "); 3532 else 3533 printf("%d ", f->f_pmask[i]); 3534 printf("%s: ", TypeInfo[f->f_type].name); 3535 switch (f->f_type) { 3536 case F_FILE: 3537 case F_TTY: 3538 case F_CONSOLE: 3539 case F_FIFO: 3540 printf("%s", f->f_un.f_fname); 3541 break; 3542 3543 case F_FORW: 3544 printf("%s", f->f_un.f_forw.f_hname); 3545 break; 3546 #ifndef DISABLE_TLS 3547 case F_TLS: 3548 printf("[%s]", f->f_un.f_tls.tls_conn->hostname); 3549 break; 3550 #endif /* !DISABLE_TLS */ 3551 case F_PIPE: 3552 printf("%s", f->f_un.f_pipe.f_pname); 3553 break; 3554 3555 case F_USERS: 3556 for (i = 0; 3557 i < MAXUNAMES && *f->f_un.f_uname[i]; i++) 3558 printf("%s, ", f->f_un.f_uname[i]); 3559 break; 3560 } 3561 if (f->f_program != NULL) 3562 printf(" (%s)", f->f_program); 3563 printf("\n"); 3564 } 3565 } 3566 3567 finet = socksetup(PF_UNSPEC, bindhostname); 3568 if (finet) { 3569 if (SecureMode) { 3570 for (i = 0; i < finet->fd; i++) { 3571 if (shutdown(finet[i+1].fd, SHUT_RD) < 0) { 3572 logerror("shutdown() failed"); 3573 die(0, 0, NULL); 3574 } 3575 } 3576 } else 3577 DPRINTF(D_NET, "Listening on inet and/or inet6 socket\n"); 3578 DPRINTF(D_NET, "Sending on inet and/or inet6 socket\n"); 3579 } 3580 3581 #ifndef DISABLE_TLS 3582 /* TLS setup -- after all local destinations opened */ 3583 DPRINTF(D_PARSE, "Parsed options: tls_ca: %s, tls_cadir: %s, " 3584 "tls_cert: %s, tls_key: %s, tls_verify: %s, " 3585 "bind: %s:%s, max. queue_lengths: %" 3586 PRId64 ", %" PRId64 ", %" PRId64 ", " 3587 "max. queue_sizes: %" 3588 PRId64 ", %" PRId64 ", %" PRId64 "\n", 3589 tls_opt.CAfile, tls_opt.CAdir, 3590 tls_opt.certfile, tls_opt.keyfile, tls_opt.x509verify, 3591 tls_opt.bindhost, tls_opt.bindport, 3592 TypeInfo[F_TLS].queue_length, TypeInfo[F_FILE].queue_length, 3593 TypeInfo[F_PIPE].queue_length, 3594 TypeInfo[F_TLS].queue_size, TypeInfo[F_FILE].queue_size, 3595 TypeInfo[F_PIPE].queue_size); 3596 SLIST_FOREACH(cred, &tls_opt.cert_head, entries) { 3597 DPRINTF(D_PARSE, "Accepting peer certificate " 3598 "from file: \"%s\"\n", cred->data); 3599 } 3600 SLIST_FOREACH(cred, &tls_opt.fprint_head, entries) { 3601 DPRINTF(D_PARSE, "Accepting peer certificate with " 3602 "fingerprint: \"%s\"\n", cred->data); 3603 } 3604 3605 /* Note: The order of initialization is important because syslog-sign 3606 * should use the TLS cert for signing. -- So we check first if TLS 3607 * will be used and initialize it before starting -sign. 3608 * 3609 * This means that if we are a client without TLS destinations TLS 3610 * will not be initialized and syslog-sign will generate a new key. 3611 * -- Even if the user has set a usable tls_cert. 3612 * Is this the expected behaviour? The alternative would be to always 3613 * initialize the TLS structures, even if they will not be needed 3614 * (or only needed to read the DSA key for -sign). 3615 */ 3616 3617 /* Initialize TLS only if used */ 3618 if (tls_opt.server) 3619 tls_status_msg = init_global_TLS_CTX(); 3620 else 3621 for (f = Files; f; f = f->f_next) { 3622 if (f->f_type != F_TLS) 3623 continue; 3624 tls_status_msg = init_global_TLS_CTX(); 3625 break; 3626 } 3627 3628 #endif /* !DISABLE_TLS */ 3629 3630 #ifndef DISABLE_SIGN 3631 /* only initialize -sign if actually used */ 3632 if (GlobalSign.sg == 0 || GlobalSign.sg == 1 || GlobalSign.sg == 2) 3633 (void)sign_global_init(Files); 3634 else if (GlobalSign.sg == 3) 3635 for (f = Files; f; f = f->f_next) 3636 if (f->f_flags & FFLAG_SIGN) { 3637 (void)sign_global_init(Files); 3638 break; 3639 } 3640 #endif /* !DISABLE_SIGN */ 3641 3642 #ifndef DISABLE_TLS 3643 if (tls_status_msg) { 3644 loginfo("%s", tls_status_msg); 3645 free(tls_status_msg); 3646 } 3647 DPRINTF((D_NET|D_TLS), "Preparing sockets for TLS\n"); 3648 TLS_Listen_Set = 3649 socksetup_tls(PF_UNSPEC, tls_opt.bindhost, tls_opt.bindport); 3650 3651 for (f = Files; f; f = f->f_next) { 3652 if (f->f_type != F_TLS) 3653 continue; 3654 if (!tls_connect(f->f_un.f_tls.tls_conn)) { 3655 logerror("Unable to connect to TLS server %s", 3656 f->f_un.f_tls.tls_conn->hostname); 3657 /* Reconnect after x seconds */ 3658 schedule_event(&f->f_un.f_tls.tls_conn->event, 3659 &((struct timeval){TLS_RECONNECT_SEC, 0}), 3660 tls_reconnect, f->f_un.f_tls.tls_conn); 3661 } 3662 } 3663 #endif /* !DISABLE_TLS */ 3664 3665 loginfo("restart"); 3666 /* 3667 * Log a change in hostname, but only on a restart (we detect this 3668 * by checking to see if we're passed a kevent). 3669 */ 3670 if (oldLocalFQDN && strcmp(oldLocalFQDN, LocalFQDN) != 0) 3671 loginfo("host name changed, \"%s\" to \"%s\"", 3672 oldLocalFQDN, LocalFQDN); 3673 3674 RESTORE_SIGNALS(omask); 3675 } 3676 3677 /* 3678 * Crack a configuration file line 3679 */ 3680 void 3681 cfline(size_t linenum, const char *line, struct filed *f, const char *prog, 3682 const char *host) 3683 { 3684 struct addrinfo hints, *res; 3685 int error, i, pri, syncfile; 3686 const char *p, *q; 3687 char *bp; 3688 char buf[MAXLINE]; 3689 struct stat sb; 3690 3691 DPRINTF((D_CALL|D_PARSE), 3692 "cfline(%zu, \"%s\", f, \"%s\", \"%s\")\n", 3693 linenum, line, prog, host); 3694 3695 errno = 0; /* keep strerror() stuff out of logerror messages */ 3696 3697 /* clear out file entry */ 3698 memset(f, 0, sizeof(*f)); 3699 for (i = 0; i <= LOG_NFACILITIES; i++) 3700 f->f_pmask[i] = INTERNAL_NOPRI; 3701 STAILQ_INIT(&f->f_qhead); 3702 3703 /* 3704 * There should not be any space before the log facility. 3705 * Check this is okay, complain and fix if it is not. 3706 */ 3707 q = line; 3708 if (isblank((unsigned char)*line)) { 3709 errno = 0; 3710 logerror("Warning: `%s' space or tab before the log facility", 3711 line); 3712 /* Fix: strip all spaces/tabs before the log facility */ 3713 while (*q++ && isblank((unsigned char)*q)) 3714 /* skip blanks */; 3715 line = q; 3716 } 3717 3718 /* 3719 * q is now at the first char of the log facility 3720 * There should be at least one tab after the log facility 3721 * Check this is okay, and complain and fix if it is not. 3722 */ 3723 q = line + strlen(line); 3724 while (!isblank((unsigned char)*q) && (q != line)) 3725 q--; 3726 if ((q == line) && strlen(line)) { 3727 /* No tabs or space in a non empty line: complain */ 3728 errno = 0; 3729 logerror( 3730 "Error: `%s' log facility or log target missing", 3731 line); 3732 return; 3733 } 3734 3735 /* save host name, if any */ 3736 if (*host == '*') 3737 f->f_host = NULL; 3738 else { 3739 f->f_host = strdup(host); 3740 trim_anydomain(&f->f_host[1]); /* skip +/- at beginning */ 3741 } 3742 3743 /* save program name, if any */ 3744 if (*prog == '*') 3745 f->f_program = NULL; 3746 else 3747 f->f_program = strdup(prog); 3748 3749 /* scan through the list of selectors */ 3750 for (p = line; *p && !isblank((unsigned char)*p);) { 3751 int pri_done, pri_cmp, pri_invert; 3752 3753 /* find the end of this facility name list */ 3754 for (q = p; *q && !isblank((unsigned char)*q) && *q++ != '.'; ) 3755 continue; 3756 3757 /* get the priority comparison */ 3758 pri_cmp = 0; 3759 pri_done = 0; 3760 pri_invert = 0; 3761 if (*q == '!') { 3762 pri_invert = 1; 3763 q++; 3764 } 3765 while (! pri_done) { 3766 switch (*q) { 3767 case '<': 3768 pri_cmp = PRI_LT; 3769 q++; 3770 break; 3771 case '=': 3772 pri_cmp = PRI_EQ; 3773 q++; 3774 break; 3775 case '>': 3776 pri_cmp = PRI_GT; 3777 q++; 3778 break; 3779 default: 3780 pri_done = 1; 3781 break; 3782 } 3783 } 3784 3785 /* collect priority name */ 3786 for (bp = buf; *q && !strchr("\t ,;", *q); ) 3787 *bp++ = *q++; 3788 *bp = '\0'; 3789 3790 /* skip cruft */ 3791 while (strchr(",;", *q)) 3792 q++; 3793 3794 /* decode priority name */ 3795 if (*buf == '*') { 3796 pri = LOG_PRIMASK + 1; 3797 pri_cmp = PRI_LT | PRI_EQ | PRI_GT; 3798 } else { 3799 pri = decode(buf, prioritynames); 3800 if (pri < 0) { 3801 errno = 0; 3802 logerror("Unknown priority name `%s'", buf); 3803 return; 3804 } 3805 } 3806 if (pri_cmp == 0) 3807 pri_cmp = UniquePriority ? PRI_EQ 3808 : PRI_EQ | PRI_GT; 3809 if (pri_invert) 3810 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT; 3811 3812 /* scan facilities */ 3813 while (*p && !strchr("\t .;", *p)) { 3814 for (bp = buf; *p && !strchr("\t ,;.", *p); ) 3815 *bp++ = *p++; 3816 *bp = '\0'; 3817 if (*buf == '*') 3818 for (i = 0; i < LOG_NFACILITIES; i++) { 3819 f->f_pmask[i] = pri; 3820 f->f_pcmp[i] = pri_cmp; 3821 } 3822 else { 3823 i = decode(buf, facilitynames); 3824 if (i < 0) { 3825 errno = 0; 3826 logerror("Unknown facility name `%s'", 3827 buf); 3828 return; 3829 } 3830 f->f_pmask[i >> 3] = pri; 3831 f->f_pcmp[i >> 3] = pri_cmp; 3832 } 3833 while (*p == ',' || *p == ' ') 3834 p++; 3835 } 3836 3837 p = q; 3838 } 3839 3840 /* skip to action part */ 3841 while (isblank((unsigned char)*p)) 3842 p++; 3843 3844 /* 3845 * should this be "#ifndef DISABLE_SIGN" or is it a general option? 3846 * '+' before file destination: write with PRI field for later 3847 * verification 3848 */ 3849 if (*p == '+') { 3850 f->f_flags |= FFLAG_FULL; 3851 p++; 3852 } 3853 if (*p == '-') { 3854 syncfile = 0; 3855 p++; 3856 } else 3857 syncfile = 1; 3858 3859 switch (*p) { 3860 case '@': 3861 #ifndef DISABLE_SIGN 3862 if (GlobalSign.sg == 3) 3863 f->f_flags |= FFLAG_SIGN; 3864 #endif /* !DISABLE_SIGN */ 3865 #ifndef DISABLE_TLS 3866 if (*(p+1) == '[') { 3867 /* TLS destination */ 3868 if (!parse_tls_destination(p, f, linenum)) { 3869 logerror("Unable to parse action %s", p); 3870 break; 3871 } 3872 f->f_type = F_TLS; 3873 break; 3874 } 3875 #endif /* !DISABLE_TLS */ 3876 (void)strlcpy(f->f_un.f_forw.f_hname, ++p, 3877 sizeof(f->f_un.f_forw.f_hname)); 3878 memset(&hints, 0, sizeof(hints)); 3879 hints.ai_family = AF_UNSPEC; 3880 hints.ai_socktype = SOCK_DGRAM; 3881 hints.ai_protocol = 0; 3882 error = getaddrinfo(f->f_un.f_forw.f_hname, "syslog", &hints, 3883 &res); 3884 if (error) { 3885 errno = 0; 3886 logerror("%s", gai_strerror(error)); 3887 break; 3888 } 3889 f->f_un.f_forw.f_addr = res; 3890 f->f_type = F_FORW; 3891 NumForwards++; 3892 break; 3893 3894 case '/': 3895 #ifndef DISABLE_SIGN 3896 if (GlobalSign.sg == 3) 3897 f->f_flags |= FFLAG_SIGN; 3898 #endif /* !DISABLE_SIGN */ 3899 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname)); 3900 if ((f->f_file = open(p, O_WRONLY|O_APPEND|O_NONBLOCK, 0)) < 0) 3901 { 3902 f->f_type = F_UNUSED; 3903 logerror("%s", p); 3904 break; 3905 } 3906 if (!fstat(f->f_file, &sb) && S_ISFIFO(sb.st_mode)) { 3907 f->f_file = -1; 3908 f->f_type = F_FIFO; 3909 break; 3910 } 3911 3912 if (isatty(f->f_file)) { 3913 f->f_type = F_TTY; 3914 if (strcmp(p, ctty) == 0) 3915 f->f_type = F_CONSOLE; 3916 } else 3917 f->f_type = F_FILE; 3918 3919 if (syncfile) 3920 f->f_flags |= FFLAG_SYNC; 3921 break; 3922 3923 case '|': 3924 #ifndef DISABLE_SIGN 3925 if (GlobalSign.sg == 3) 3926 f->f_flags |= FFLAG_SIGN; 3927 #endif 3928 f->f_un.f_pipe.f_pid = 0; 3929 (void) strlcpy(f->f_un.f_pipe.f_pname, p + 1, 3930 sizeof(f->f_un.f_pipe.f_pname)); 3931 f->f_type = F_PIPE; 3932 break; 3933 3934 case '*': 3935 f->f_type = F_WALL; 3936 break; 3937 3938 default: 3939 for (i = 0; i < MAXUNAMES && *p; i++) { 3940 for (q = p; *q && *q != ','; ) 3941 q++; 3942 (void)strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE); 3943 if ((q - p) > UT_NAMESIZE) 3944 f->f_un.f_uname[i][UT_NAMESIZE] = '\0'; 3945 else 3946 f->f_un.f_uname[i][q - p] = '\0'; 3947 while (*q == ',' || *q == ' ') 3948 q++; 3949 p = q; 3950 } 3951 f->f_type = F_USERS; 3952 break; 3953 } 3954 } 3955 3956 3957 /* 3958 * Decode a symbolic name to a numeric value 3959 */ 3960 int 3961 decode(const char *name, CODE *codetab) 3962 { 3963 CODE *c; 3964 char *p, buf[40]; 3965 3966 if (isdigit((unsigned char)*name)) 3967 return atoi(name); 3968 3969 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) { 3970 if (isupper((unsigned char)*name)) 3971 *p = tolower((unsigned char)*name); 3972 else 3973 *p = *name; 3974 } 3975 *p = '\0'; 3976 for (c = codetab; c->c_name; c++) 3977 if (!strcmp(buf, c->c_name)) 3978 return c->c_val; 3979 3980 return -1; 3981 } 3982 3983 /* 3984 * Retrieve the size of the kernel message buffer, via sysctl. 3985 */ 3986 int 3987 getmsgbufsize(void) 3988 { 3989 #ifdef __NetBSD_Version__ 3990 int msgbufsize, mib[2]; 3991 size_t size; 3992 3993 mib[0] = CTL_KERN; 3994 mib[1] = KERN_MSGBUFSIZE; 3995 size = sizeof msgbufsize; 3996 if (sysctl(mib, 2, &msgbufsize, &size, NULL, 0) == -1) { 3997 DPRINTF(D_MISC, "Couldn't get kern.msgbufsize\n"); 3998 return 0; 3999 } 4000 return msgbufsize; 4001 #else 4002 return MAXLINE; 4003 #endif /* __NetBSD_Version__ */ 4004 } 4005 4006 /* 4007 * Retrieve the hostname, via sysctl. 4008 */ 4009 char * 4010 getLocalFQDN(void) 4011 { 4012 int mib[2]; 4013 char *hostname; 4014 size_t len; 4015 4016 mib[0] = CTL_KERN; 4017 mib[1] = KERN_HOSTNAME; 4018 sysctl(mib, 2, NULL, &len, NULL, 0); 4019 4020 if (!(hostname = malloc(len))) { 4021 logerror("Unable to allocate memory"); 4022 die(0,0,NULL); 4023 } else if (sysctl(mib, 2, hostname, &len, NULL, 0) == -1) { 4024 DPRINTF(D_MISC, "Couldn't get kern.hostname\n"); 4025 (void)gethostname(hostname, sizeof(len)); 4026 } 4027 return hostname; 4028 } 4029 4030 struct socketEvent * 4031 socksetup(int af, const char *hostname) 4032 { 4033 struct addrinfo hints, *res, *r; 4034 int error, maxs; 4035 int on = 1; 4036 struct socketEvent *s, *socks; 4037 4038 if(SecureMode && !NumForwards) 4039 return NULL; 4040 4041 memset(&hints, 0, sizeof(hints)); 4042 hints.ai_flags = AI_PASSIVE; 4043 hints.ai_family = af; 4044 hints.ai_socktype = SOCK_DGRAM; 4045 error = getaddrinfo(hostname, "syslog", &hints, &res); 4046 if (error) { 4047 errno = 0; 4048 logerror("%s", gai_strerror(error)); 4049 die(0, 0, NULL); 4050 } 4051 4052 /* Count max number of sockets we may open */ 4053 for (maxs = 0, r = res; r; r = r->ai_next, maxs++) 4054 continue; 4055 socks = calloc(maxs+1, sizeof(*socks)); 4056 if (!socks) { 4057 logerror("Couldn't allocate memory for sockets"); 4058 die(0, 0, NULL); 4059 } 4060 4061 socks->fd = 0; /* num of sockets counter at start of array */ 4062 s = socks + 1; 4063 for (r = res; r; r = r->ai_next) { 4064 s->fd = socket(r->ai_family, r->ai_socktype, r->ai_protocol); 4065 if (s->fd < 0) { 4066 logerror("socket() failed"); 4067 continue; 4068 } 4069 s->af = r->ai_family; 4070 if (r->ai_family == AF_INET6 && setsockopt(s->fd, IPPROTO_IPV6, 4071 IPV6_V6ONLY, &on, sizeof(on)) < 0) { 4072 logerror("setsockopt(IPV6_V6ONLY) failed"); 4073 close(s->fd); 4074 continue; 4075 } 4076 4077 if (!SecureMode) { 4078 if (bind(s->fd, r->ai_addr, r->ai_addrlen) < 0) { 4079 logerror("bind() failed"); 4080 close(s->fd); 4081 continue; 4082 } 4083 s->ev = allocev(); 4084 event_set(s->ev, s->fd, EV_READ | EV_PERSIST, 4085 dispatch_read_finet, s->ev); 4086 if (event_add(s->ev, NULL) == -1) { 4087 DPRINTF((D_EVENT|D_NET), 4088 "Failure in event_add()\n"); 4089 } else { 4090 DPRINTF((D_EVENT|D_NET), 4091 "Listen on UDP port " 4092 "(event@%p)\n", s->ev); 4093 } 4094 } 4095 4096 socks->fd++; /* num counter */ 4097 s++; 4098 } 4099 4100 if (res) 4101 freeaddrinfo(res); 4102 if (socks->fd == 0) { 4103 free (socks); 4104 if(Debug) 4105 return NULL; 4106 else 4107 die(0, 0, NULL); 4108 } 4109 return socks; 4110 } 4111 4112 /* 4113 * Fairly similar to popen(3), but returns an open descriptor, as opposed 4114 * to a FILE *. 4115 */ 4116 int 4117 p_open(char *prog, pid_t *rpid) 4118 { 4119 static char sh[] = "sh", mc[] = "-c"; 4120 int pfd[2], nulldesc, i; 4121 pid_t pid; 4122 char *argv[4]; /* sh -c cmd NULL */ 4123 4124 if (pipe(pfd) == -1) 4125 return -1; 4126 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1) { 4127 /* We are royally screwed anyway. */ 4128 return -1; 4129 } 4130 4131 switch ((pid = fork())) { 4132 case -1: 4133 (void) close(nulldesc); 4134 return -1; 4135 4136 case 0: 4137 argv[0] = sh; 4138 argv[1] = mc; 4139 argv[2] = prog; 4140 argv[3] = NULL; 4141 4142 (void) setsid(); /* avoid catching SIGHUPs. */ 4143 4144 /* 4145 * Reset ignored signals to their default behavior. 4146 */ 4147 (void)signal(SIGTERM, SIG_DFL); 4148 (void)signal(SIGINT, SIG_DFL); 4149 (void)signal(SIGQUIT, SIG_DFL); 4150 (void)signal(SIGPIPE, SIG_DFL); 4151 (void)signal(SIGHUP, SIG_DFL); 4152 4153 dup2(pfd[0], STDIN_FILENO); 4154 dup2(nulldesc, STDOUT_FILENO); 4155 dup2(nulldesc, STDERR_FILENO); 4156 for (i = getdtablesize(); i > 2; i--) 4157 (void) close(i); 4158 4159 (void) execvp(_PATH_BSHELL, argv); 4160 _exit(255); 4161 } 4162 4163 (void) close(nulldesc); 4164 (void) close(pfd[0]); 4165 4166 /* 4167 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are 4168 * supposed to get an EWOULDBLOCK on writev(2), which is 4169 * caught by the logic above anyway, which will in turn 4170 * close the pipe, and fork a new logging subprocess if 4171 * necessary. The stale subprocess will be killed some 4172 * time later unless it terminated itself due to closing 4173 * its input pipe. 4174 */ 4175 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) { 4176 /* This is bad. */ 4177 logerror("Warning: cannot change pipe to pid %d to " 4178 "non-blocking.", (int) pid); 4179 } 4180 *rpid = pid; 4181 return pfd[1]; 4182 } 4183 4184 void 4185 deadq_enter(pid_t pid, const char *name) 4186 { 4187 dq_t p; 4188 int status; 4189 4190 /* 4191 * Be paranoid: if we can't signal the process, don't enter it 4192 * into the dead queue (perhaps it's already dead). If possible, 4193 * we try to fetch and log the child's status. 4194 */ 4195 if (kill(pid, 0) != 0) { 4196 if (waitpid(pid, &status, WNOHANG) > 0) 4197 log_deadchild(pid, status, name); 4198 return; 4199 } 4200 4201 p = malloc(sizeof(*p)); 4202 if (p == NULL) { 4203 logerror("panic: out of memory!"); 4204 exit(1); 4205 } 4206 4207 p->dq_pid = pid; 4208 p->dq_timeout = DQ_TIMO_INIT; 4209 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries); 4210 } 4211 4212 int 4213 deadq_remove(pid_t pid) 4214 { 4215 dq_t q; 4216 4217 for (q = TAILQ_FIRST(&deadq_head); q != NULL; 4218 q = TAILQ_NEXT(q, dq_entries)) { 4219 if (q->dq_pid == pid) { 4220 TAILQ_REMOVE(&deadq_head, q, dq_entries); 4221 free(q); 4222 return 1; 4223 } 4224 } 4225 return 0; 4226 } 4227 4228 void 4229 log_deadchild(pid_t pid, int status, const char *name) 4230 { 4231 int code; 4232 char buf[256]; 4233 const char *reason; 4234 4235 /* Keep strerror() struff out of logerror messages. */ 4236 errno = 0; 4237 if (WIFSIGNALED(status)) { 4238 reason = "due to signal"; 4239 code = WTERMSIG(status); 4240 } else { 4241 reason = "with status"; 4242 code = WEXITSTATUS(status); 4243 if (code == 0) 4244 return; 4245 } 4246 (void) snprintf(buf, sizeof(buf), 4247 "Logging subprocess %d (%s) exited %s %d.", 4248 pid, name, reason, code); 4249 logerror("%s", buf); 4250 } 4251 4252 struct event * 4253 allocev(void) 4254 { 4255 struct event *ev; 4256 4257 if (!(ev = calloc(1, sizeof(*ev)))) 4258 logerror("Unable to allocate memory"); 4259 return ev; 4260 } 4261 4262 /* *ev is allocated if necessary */ 4263 void 4264 schedule_event(struct event **ev, struct timeval *tv, 4265 void (*cb)(int, short, void *), void *arg) 4266 { 4267 if (!*ev && !(*ev = allocev())) { 4268 return; 4269 } 4270 event_set(*ev, 0, 0, cb, arg); 4271 DPRINTF(D_EVENT, "event_add(%s@%p)\n", "schedule_ev", *ev); \ 4272 if (event_add(*ev, tv) == -1) { 4273 DPRINTF(D_EVENT, "Failure in event_add()\n"); 4274 } 4275 } 4276 4277 #ifndef DISABLE_TLS 4278 /* abbreviation for freeing credential lists */ 4279 void 4280 free_cred_SLIST(struct peer_cred_head *head) 4281 { 4282 struct peer_cred *cred; 4283 4284 while (!SLIST_EMPTY(head)) { 4285 cred = SLIST_FIRST(head); 4286 SLIST_REMOVE_HEAD(head, entries); 4287 FREEPTR(cred->data); 4288 free(cred); 4289 } 4290 } 4291 #endif /* !DISABLE_TLS */ 4292 4293 /* 4294 * send message queue after reconnect 4295 */ 4296 /*ARGSUSED*/ 4297 void 4298 send_queue(int fd, short event, void *arg) 4299 { 4300 struct filed *f = (struct filed *) arg; 4301 struct buf_queue *qentry; 4302 #define SQ_CHUNK_SIZE 250 4303 size_t cnt = 0; 4304 4305 #ifndef DISABLE_TLS 4306 if (f->f_type == F_TLS) { 4307 /* use a flag to prevent recursive calls to send_queue() */ 4308 if (f->f_un.f_tls.tls_conn->send_queue) 4309 return; 4310 else 4311 f->f_un.f_tls.tls_conn->send_queue = true; 4312 } 4313 DPRINTF((D_DATA|D_CALL), "send_queue(f@%p with %zu msgs, " 4314 "cnt@%p = %zu)\n", f, f->f_qelements, &cnt, cnt); 4315 #endif /* !DISABLE_TLS */ 4316 4317 while ((qentry = STAILQ_FIRST(&f->f_qhead))) { 4318 #ifndef DISABLE_TLS 4319 /* send_queue() might be called with an unconnected destination 4320 * from init() or die() or one message might take longer, 4321 * leaving the connection in state ST_WAITING and thus not 4322 * ready for the next message. 4323 * this check is a shortcut to skip these unnecessary calls */ 4324 if (f->f_type == F_TLS 4325 && f->f_un.f_tls.tls_conn->state != ST_TLS_EST) { 4326 DPRINTF(D_TLS, "abort send_queue(cnt@%p = %zu) " 4327 "on TLS connection in state %d\n", 4328 &cnt, cnt, f->f_un.f_tls.tls_conn->state); 4329 return; 4330 } 4331 #endif /* !DISABLE_TLS */ 4332 fprintlog(f, qentry->msg, qentry); 4333 4334 /* Sending a long queue can take some time during which 4335 * SIGHUP and SIGALRM are blocked and no events are handled. 4336 * To avoid that we only send SQ_CHUNK_SIZE messages at once 4337 * and then reschedule ourselves to continue. Thus the control 4338 * will return first from all signal-protected functions so a 4339 * possible SIGHUP/SIGALRM is handled and then back to the 4340 * main loop which can handle possible input. 4341 */ 4342 if (++cnt >= SQ_CHUNK_SIZE) { 4343 if (!f->f_sq_event) { /* alloc on demand */ 4344 f->f_sq_event = allocev(); 4345 event_set(f->f_sq_event, 0, 0, send_queue, f); 4346 } 4347 if (event_add(f->f_sq_event, &((struct timeval){0, 1})) == -1) { 4348 DPRINTF(D_EVENT, "Failure in event_add()\n"); 4349 } 4350 break; 4351 } 4352 } 4353 #ifndef DISABLE_TLS 4354 if (f->f_type == F_TLS) 4355 f->f_un.f_tls.tls_conn->send_queue = false; 4356 #endif 4357 4358 } 4359 4360 /* 4361 * finds the next queue element to delete 4362 * 4363 * has stateful behaviour, before using it call once with reset = true 4364 * after that every call will return one next queue elemen to delete, 4365 * depending on strategy either the oldest or the one with the lowest priority 4366 */ 4367 static struct buf_queue * 4368 find_qentry_to_delete(const struct buf_queue_head *head, int strategy, 4369 bool reset) 4370 { 4371 static int pri; 4372 static struct buf_queue *qentry_static; 4373 4374 struct buf_queue *qentry_tmp; 4375 4376 if (reset || STAILQ_EMPTY(head)) { 4377 pri = LOG_DEBUG; 4378 qentry_static = STAILQ_FIRST(head); 4379 return NULL; 4380 } 4381 4382 /* find elements to delete */ 4383 if (strategy == PURGE_BY_PRIORITY) { 4384 qentry_tmp = qentry_static; 4385 if (!qentry_tmp) return NULL; 4386 while ((qentry_tmp = STAILQ_NEXT(qentry_tmp, entries)) != NULL) 4387 { 4388 if (LOG_PRI(qentry_tmp->msg->pri) == pri) { 4389 /* save the successor, because qentry_tmp 4390 * is probably deleted by the caller */ 4391 qentry_static = STAILQ_NEXT(qentry_tmp, entries); 4392 return qentry_tmp; 4393 } 4394 } 4395 /* nothing found in while loop --> next pri */ 4396 if (--pri) 4397 return find_qentry_to_delete(head, strategy, false); 4398 else 4399 return NULL; 4400 } else /* strategy == PURGE_OLDEST or other value */ { 4401 qentry_tmp = qentry_static; 4402 qentry_static = STAILQ_NEXT(qentry_tmp, entries); 4403 return qentry_tmp; /* is NULL on empty queue */ 4404 } 4405 } 4406 4407 /* note on TAILQ: newest message added at TAIL, 4408 * oldest to be removed is FIRST 4409 */ 4410 /* 4411 * checks length of a destination's message queue 4412 * if del_entries == 0 then assert queue length is 4413 * less or equal to configured number of queue elements 4414 * otherwise del_entries tells how many entries to delete 4415 * 4416 * returns the number of removed queue elements 4417 * (which not necessarily means free'd messages) 4418 * 4419 * strategy PURGE_OLDEST to delete oldest entry, e.g. after it was resent 4420 * strategy PURGE_BY_PRIORITY to delete messages with lowest priority first, 4421 * this is much slower but might be desirable when unsent messages have 4422 * to be deleted, e.g. in call from domark() 4423 */ 4424 size_t 4425 message_queue_purge(struct filed *f, size_t del_entries, int strategy) 4426 { 4427 size_t removed = 0; 4428 struct buf_queue *qentry = NULL; 4429 4430 DPRINTF((D_CALL|D_BUFFER), "purge_message_queue(%p, %zu, %d) with " 4431 "f_qelements=%zu and f_qsize=%zu\n", 4432 f, del_entries, strategy, 4433 f->f_qelements, f->f_qsize); 4434 4435 /* reset state */ 4436 (void)find_qentry_to_delete(&f->f_qhead, strategy, true); 4437 4438 while (removed < del_entries 4439 || (TypeInfo[f->f_type].queue_length != -1 4440 && (size_t)TypeInfo[f->f_type].queue_length <= f->f_qelements) 4441 || (TypeInfo[f->f_type].queue_size != -1 4442 && (size_t)TypeInfo[f->f_type].queue_size <= f->f_qsize)) { 4443 qentry = find_qentry_to_delete(&f->f_qhead, strategy, 0); 4444 if (message_queue_remove(f, qentry)) 4445 removed++; 4446 else 4447 break; 4448 } 4449 return removed; 4450 } 4451 4452 /* run message_queue_purge() for all destinations to free memory */ 4453 size_t 4454 message_allqueues_purge(void) 4455 { 4456 size_t sum = 0; 4457 struct filed *f; 4458 4459 for (f = Files; f; f = f->f_next) 4460 sum += message_queue_purge(f, 4461 f->f_qelements/10, PURGE_BY_PRIORITY); 4462 4463 DPRINTF(D_BUFFER, 4464 "message_allqueues_purge(): removed %zu buffer entries\n", sum); 4465 return sum; 4466 } 4467 4468 /* run message_queue_purge() for all destinations to check limits */ 4469 size_t 4470 message_allqueues_check(void) 4471 { 4472 size_t sum = 0; 4473 struct filed *f; 4474 4475 for (f = Files; f; f = f->f_next) 4476 sum += message_queue_purge(f, 0, PURGE_BY_PRIORITY); 4477 DPRINTF(D_BUFFER, 4478 "message_allqueues_check(): removed %zu buffer entries\n", sum); 4479 return sum; 4480 } 4481 4482 struct buf_msg * 4483 buf_msg_new(const size_t len) 4484 { 4485 struct buf_msg *newbuf; 4486 4487 CALLOC(newbuf, sizeof(*newbuf)); 4488 4489 if (len) { /* len = 0 is valid */ 4490 MALLOC(newbuf->msg, len); 4491 newbuf->msgorig = newbuf->msg; 4492 newbuf->msgsize = len; 4493 } 4494 return NEWREF(newbuf); 4495 } 4496 4497 void 4498 buf_msg_free(struct buf_msg *buf) 4499 { 4500 if (!buf) 4501 return; 4502 4503 buf->refcount--; 4504 if (buf->refcount == 0) { 4505 FREEPTR(buf->timestamp); 4506 /* small optimizations: the host/recvhost may point to the 4507 * global HostName/FQDN. of course this must not be free()d 4508 * same goes for appname and include_pid 4509 */ 4510 if (buf->recvhost != buf->host 4511 && buf->recvhost != LocalHostName 4512 && buf->recvhost != LocalFQDN 4513 && buf->recvhost != oldLocalFQDN) 4514 FREEPTR(buf->recvhost); 4515 if (buf->host != LocalHostName 4516 && buf->host != LocalFQDN 4517 && buf->host != oldLocalFQDN) 4518 FREEPTR(buf->host); 4519 if (buf->prog != appname) 4520 FREEPTR(buf->prog); 4521 if (buf->pid != include_pid) 4522 FREEPTR(buf->pid); 4523 FREEPTR(buf->msgid); 4524 FREEPTR(buf->sd); 4525 FREEPTR(buf->msgorig); /* instead of msg */ 4526 FREEPTR(buf); 4527 } 4528 } 4529 4530 size_t 4531 buf_queue_obj_size(struct buf_queue *qentry) 4532 { 4533 size_t sum = 0; 4534 4535 if (!qentry) 4536 return 0; 4537 sum += sizeof(*qentry) 4538 + sizeof(*qentry->msg) 4539 + qentry->msg->msgsize 4540 + SAFEstrlen(qentry->msg->timestamp)+1 4541 + SAFEstrlen(qentry->msg->msgid)+1; 4542 if (qentry->msg->prog 4543 && qentry->msg->prog != include_pid) 4544 sum += strlen(qentry->msg->prog)+1; 4545 if (qentry->msg->pid 4546 && qentry->msg->pid != appname) 4547 sum += strlen(qentry->msg->pid)+1; 4548 if (qentry->msg->recvhost 4549 && qentry->msg->recvhost != LocalHostName 4550 && qentry->msg->recvhost != LocalFQDN 4551 && qentry->msg->recvhost != oldLocalFQDN) 4552 sum += strlen(qentry->msg->recvhost)+1; 4553 if (qentry->msg->host 4554 && qentry->msg->host != LocalHostName 4555 && qentry->msg->host != LocalFQDN 4556 && qentry->msg->host != oldLocalFQDN) 4557 sum += strlen(qentry->msg->host)+1; 4558 4559 return sum; 4560 } 4561 4562 bool 4563 message_queue_remove(struct filed *f, struct buf_queue *qentry) 4564 { 4565 if (!f || !qentry || !qentry->msg) 4566 return false; 4567 4568 assert(!STAILQ_EMPTY(&f->f_qhead)); 4569 STAILQ_REMOVE(&f->f_qhead, qentry, buf_queue, entries); 4570 f->f_qelements--; 4571 f->f_qsize -= buf_queue_obj_size(qentry); 4572 4573 DPRINTF(D_BUFFER, "msg @%p removed from queue @%p, new qlen = %zu\n", 4574 qentry->msg, f, f->f_qelements); 4575 DELREF(qentry->msg); 4576 FREEPTR(qentry); 4577 return true; 4578 } 4579 4580 /* 4581 * returns *qentry on success and NULL on error 4582 */ 4583 struct buf_queue * 4584 message_queue_add(struct filed *f, struct buf_msg *buffer) 4585 { 4586 struct buf_queue *qentry; 4587 4588 /* check on every call or only every n-th time? */ 4589 message_queue_purge(f, 0, PURGE_BY_PRIORITY); 4590 4591 while (!(qentry = malloc(sizeof(*qentry))) 4592 && message_queue_purge(f, 1, PURGE_OLDEST)) 4593 continue; 4594 if (!qentry) { 4595 logerror("Unable to allocate memory"); 4596 DPRINTF(D_BUFFER, "queue empty, no memory, msg dropped\n"); 4597 return NULL; 4598 } else { 4599 qentry->msg = buffer; 4600 f->f_qelements++; 4601 f->f_qsize += buf_queue_obj_size(qentry); 4602 STAILQ_INSERT_TAIL(&f->f_qhead, qentry, entries); 4603 4604 DPRINTF(D_BUFFER, "msg @%p queued @%p, qlen = %zu\n", 4605 buffer, f, f->f_qelements); 4606 return qentry; 4607 } 4608 } 4609 4610 void 4611 message_queue_freeall(struct filed *f) 4612 { 4613 struct buf_queue *qentry; 4614 4615 if (!f) return; 4616 DPRINTF(D_MEM, "message_queue_freeall(f@%p) with f_qhead@%p\n", f, 4617 &f->f_qhead); 4618 4619 while (!STAILQ_EMPTY(&f->f_qhead)) { 4620 qentry = STAILQ_FIRST(&f->f_qhead); 4621 STAILQ_REMOVE(&f->f_qhead, qentry, buf_queue, entries); 4622 DELREF(qentry->msg); 4623 FREEPTR(qentry); 4624 } 4625 4626 f->f_qelements = 0; 4627 f->f_qsize = 0; 4628 } 4629 4630 #ifndef DISABLE_TLS 4631 /* utility function for tls_reconnect() */ 4632 struct filed * 4633 get_f_by_conninfo(struct tls_conn_settings *conn_info) 4634 { 4635 struct filed *f; 4636 4637 for (f = Files; f; f = f->f_next) { 4638 if ((f->f_type == F_TLS) && f->f_un.f_tls.tls_conn == conn_info) 4639 return f; 4640 } 4641 DPRINTF(D_TLS, "get_f_by_conninfo() called on invalid conn_info\n"); 4642 return NULL; 4643 } 4644 4645 /* 4646 * Called on signal. 4647 * Lets the admin reconnect without waiting for the reconnect timer expires. 4648 */ 4649 /*ARGSUSED*/ 4650 void 4651 dispatch_force_tls_reconnect(int fd, short event, void *ev) 4652 { 4653 struct filed *f; 4654 DPRINTF((D_TLS|D_CALL|D_EVENT), "dispatch_force_tls_reconnect()\n"); 4655 for (f = Files; f; f = f->f_next) { 4656 if (f->f_type == F_TLS && 4657 f->f_un.f_tls.tls_conn->state == ST_NONE) 4658 tls_reconnect(fd, event, f->f_un.f_tls.tls_conn); 4659 } 4660 } 4661 #endif /* !DISABLE_TLS */ 4662 4663 /* 4664 * return a timestamp in a static buffer, 4665 * either format the timestamp given by parameter in_now 4666 * or use the current time if in_now is NULL. 4667 */ 4668 char * 4669 make_timestamp(time_t *in_now, bool iso, size_t tlen) 4670 { 4671 int frac_digits = 6; 4672 struct timeval tv; 4673 time_t mytime; 4674 struct tm ltime; 4675 int len = 0; 4676 int tzlen = 0; 4677 /* uses global var: time_t now; */ 4678 4679 if (in_now) { 4680 mytime = *in_now; 4681 } else { 4682 gettimeofday(&tv, NULL); 4683 mytime = now = tv.tv_sec; 4684 } 4685 4686 if (!iso) { 4687 strlcpy(timestamp, ctime(&mytime) + 4, sizeof(timestamp)); 4688 timestamp[BSD_TIMESTAMPLEN] = '\0'; 4689 } else { 4690 localtime_r(&mytime, <ime); 4691 len += strftime(timestamp, sizeof(timestamp), "%FT%T", <ime); 4692 snprintf(×tamp[len], frac_digits + 2, ".%.*jd", 4693 frac_digits, (intmax_t)tv.tv_usec); 4694 len += frac_digits + 1; 4695 tzlen = strftime(×tamp[len], sizeof(timestamp) - len, "%z", 4696 <ime); 4697 len += tzlen; 4698 4699 if (tzlen == 5) { 4700 /* strftime gives "+0200", but we need "+02:00" */ 4701 timestamp[len + 2] = '\0'; 4702 timestamp[len + 1] = timestamp[len]; 4703 timestamp[len] = timestamp[len - 1]; 4704 timestamp[len - 1] = timestamp[len - 2]; 4705 timestamp[len - 2] = ':'; 4706 } 4707 } 4708 4709 switch (tlen) { 4710 case (size_t)-1: 4711 return timestamp; 4712 case 0: 4713 return strdup(timestamp); 4714 default: 4715 return strndup(timestamp, tlen); 4716 } 4717 } 4718 4719 /* auxillary code to allocate memory and copy a string */ 4720 bool 4721 copy_string(char **mem, const char *p, const char *q) 4722 { 4723 const size_t len = 1 + q - p; 4724 if (!(*mem = malloc(len))) { 4725 logerror("Unable to allocate memory for config"); 4726 return false; 4727 } 4728 strlcpy(*mem, p, len); 4729 return true; 4730 } 4731 4732 /* keyword has to end with ", everything until next " is copied */ 4733 bool 4734 copy_config_value_quoted(const char *keyword, char **mem, const char **p) 4735 { 4736 const char *q; 4737 if (strncasecmp(*p, keyword, strlen(keyword))) 4738 return false; 4739 q = *p += strlen(keyword); 4740 if (!(q = strchr(*p, '"'))) { 4741 errno = 0; 4742 logerror("unterminated \"\n"); 4743 return false; 4744 } 4745 if (!(copy_string(mem, *p, q))) 4746 return false; 4747 *p = ++q; 4748 return true; 4749 } 4750 4751 /* for config file: 4752 * following = required but whitespace allowed, quotes optional 4753 * if numeric, then conversion to integer and no memory allocation 4754 */ 4755 bool 4756 copy_config_value(const char *keyword, char **mem, 4757 const char **p, const char *file, int line) 4758 { 4759 if (strncasecmp(*p, keyword, strlen(keyword))) 4760 return false; 4761 *p += strlen(keyword); 4762 4763 while (isspace((unsigned char)**p)) 4764 *p += 1; 4765 if (**p != '=') { 4766 errno = 0; 4767 logerror("expected \"=\" in file %s, line %d", file, line); 4768 return false; 4769 } 4770 *p += 1; 4771 4772 return copy_config_value_word(mem, p); 4773 } 4774 4775 /* copy next parameter from a config line */ 4776 bool 4777 copy_config_value_word(char **mem, const char **p) 4778 { 4779 const char *q; 4780 while (isspace((unsigned char)**p)) 4781 *p += 1; 4782 if (**p == '"') 4783 return copy_config_value_quoted("\"", mem, p); 4784 4785 /* without quotes: find next whitespace or end of line */ 4786 (void)((q = strchr(*p, ' ')) || (q = strchr(*p, '\t')) 4787 || (q = strchr(*p, '\n')) || (q = strchr(*p, '\0'))); 4788 4789 if (q-*p == 0 || !(copy_string(mem, *p, q))) 4790 return false; 4791 4792 *p = ++q; 4793 return true; 4794 } 4795 4796 static int 4797 writev1(int fd, struct iovec *iov, size_t count) 4798 { 4799 ssize_t nw = 0, tot = 0; 4800 size_t ntries = 5; 4801 4802 if (count == 0) 4803 return 0; 4804 while (ntries--) { 4805 switch ((nw = writev(fd, iov, count))) { 4806 case -1: 4807 if (errno == EAGAIN || errno == EWOULDBLOCK) { 4808 struct pollfd pfd; 4809 pfd.fd = fd; 4810 pfd.events = POLLOUT; 4811 pfd.revents = 0; 4812 (void)poll(&pfd, 1, 500); 4813 continue; 4814 } 4815 return -1; 4816 case 0: 4817 return 0; 4818 default: 4819 tot += nw; 4820 while (nw > 0) { 4821 if (iov->iov_len > (size_t)nw) { 4822 iov->iov_len -= nw; 4823 iov->iov_base = 4824 (char *)iov->iov_base + nw; 4825 break; 4826 } else { 4827 if (--count == 0) 4828 return tot; 4829 nw -= iov->iov_len; 4830 iov++; 4831 } 4832 } 4833 } 4834 } 4835 return tot == 0 ? nw : tot; 4836 } 4837 4838 #ifndef NDEBUG 4839 void 4840 dbprintf(const char *fname, const char *funname, 4841 size_t lnum, const char *fmt, ...) 4842 { 4843 va_list ap; 4844 char *ts; 4845 4846 ts = make_timestamp(NULL, true, (size_t)-1); 4847 printf("%s:%s:%s:%.4zu\t", ts, fname, funname, lnum); 4848 4849 va_start(ap, fmt); 4850 vprintf(fmt, ap); 4851 va_end(ap); 4852 } 4853 #endif 4854