1 /* $NetBSD: syslogd.c,v 1.120 2014/08/18 05:21:16 jnemeth 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 1.120 2014/08/18 05:21:16 jnemeth Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 /* 47 * syslogd -- log system messages 48 * 49 * This program implements a system log. It takes a series of lines. 50 * Each line may have a priority, signified as "<n>" as 51 * the first characters of the line. If this is 52 * not present, a default priority is used. 53 * 54 * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will 55 * cause it to reread its configuration file. 56 * 57 * Defined Constants: 58 * 59 * MAXLINE -- the maximimum line length that can be handled. 60 * DEFUPRI -- the default priority for user messages 61 * DEFSPRI -- the default priority for kernel messages 62 * 63 * Author: Eric Allman 64 * extensive changes by Ralph Campbell 65 * more extensive changes by Eric Allman (again) 66 * Extension to log by program name as well as facility and priority 67 * by Peter da Silva. 68 * -U and -v by Harlan Stenn. 69 * Priority comparison code by Harlan Stenn. 70 * TLS, syslog-protocol, and syslog-sign code by Martin Schuette. 71 */ 72 #define SYSLOG_NAMES 73 #include <sys/stat.h> 74 #include <poll.h> 75 #include "syslogd.h" 76 #include "extern.h" 77 78 #ifndef DISABLE_SIGN 79 #include "sign.h" 80 struct sign_global_t GlobalSign = { 81 .rsid = 0, 82 .sig2_delims = STAILQ_HEAD_INITIALIZER(GlobalSign.sig2_delims) 83 }; 84 #endif /* !DISABLE_SIGN */ 85 86 #ifndef DISABLE_TLS 87 #include "tls.h" 88 #endif /* !DISABLE_TLS */ 89 90 #ifdef LIBWRAP 91 int allow_severity = LOG_AUTH|LOG_INFO; 92 int deny_severity = LOG_AUTH|LOG_WARNING; 93 #endif 94 95 const char *ConfFile = _PATH_LOGCONF; 96 char ctty[] = _PATH_CONSOLE; 97 98 /* 99 * Queue of about-to-be-dead processes we should watch out for. 100 */ 101 TAILQ_HEAD(, deadq_entry) deadq_head = TAILQ_HEAD_INITIALIZER(deadq_head); 102 103 typedef struct deadq_entry { 104 pid_t dq_pid; 105 int dq_timeout; 106 TAILQ_ENTRY(deadq_entry) dq_entries; 107 } *dq_t; 108 109 /* 110 * The timeout to apply to processes waiting on the dead queue. Unit 111 * of measure is "mark intervals", i.e. 20 minutes by default. 112 * Processes on the dead queue will be terminated after that time. 113 */ 114 #define DQ_TIMO_INIT 2 115 116 /* 117 * Intervals at which we flush out "message repeated" messages, 118 * in seconds after previous message is logged. After each flush, 119 * we move to the next interval until we reach the largest. 120 */ 121 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ 122 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) 123 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) 124 #define BACKOFF(f) { if ((size_t)(++(f)->f_repeatcount) > MAXREPEAT) \ 125 (f)->f_repeatcount = MAXREPEAT; \ 126 } 127 128 /* values for f_type */ 129 #define F_UNUSED 0 /* unused entry */ 130 #define F_FILE 1 /* regular file */ 131 #define F_TTY 2 /* terminal */ 132 #define F_CONSOLE 3 /* console terminal */ 133 #define F_FORW 4 /* remote machine */ 134 #define F_USERS 5 /* list of users */ 135 #define F_WALL 6 /* everyone logged on */ 136 #define F_PIPE 7 /* pipe to program */ 137 #define F_FIFO 8 /* mkfifo(2) file */ 138 #define F_TLS 9 139 140 struct TypeInfo { 141 const char *name; 142 char *queue_length_string; 143 const char *default_length_string; 144 char *queue_size_string; 145 const char *default_size_string; 146 int64_t queue_length; 147 int64_t queue_size; 148 int max_msg_length; 149 } TypeInfo[] = { 150 /* numeric values are set in init() 151 * -1 in length/size or max_msg_length means infinite */ 152 {"UNUSED", NULL, "0", NULL, "0", 0, 0, 0}, 153 {"FILE", NULL, "1024", NULL, "1M", 0, 0, 16384}, 154 {"TTY", NULL, "0", NULL, "0", 0, 0, 1024}, 155 {"CONSOLE", NULL, "0", NULL, "0", 0, 0, 1024}, 156 {"FORW", NULL, "0", NULL, "1M", 0, 0, 16384}, 157 {"USERS", NULL, "0", NULL, "0", 0, 0, 1024}, 158 {"WALL", NULL, "0", NULL, "0", 0, 0, 1024}, 159 {"PIPE", NULL, "1024", NULL, "1M", 0, 0, 16384}, 160 {"FIFO", NULL, "1024", NULL, "1M", 0, 0, 16384}, 161 #ifndef DISABLE_TLS 162 {"TLS", NULL, "-1", NULL, "16M", 0, 0, 16384} 163 #endif /* !DISABLE_TLS */ 164 }; 165 166 struct filed *Files = NULL; 167 struct filed consfile; 168 169 time_t now; 170 int Debug = D_NONE; /* debug flag */ 171 int daemonized = 0; /* we are not daemonized yet */ 172 char *LocalFQDN = NULL; /* our FQDN */ 173 char *oldLocalFQDN = NULL; /* our previous FQDN */ 174 char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */ 175 struct socketEvent *finet; /* Internet datagram sockets and events */ 176 int *funix; /* Unix domain datagram sockets */ 177 #ifndef DISABLE_TLS 178 struct socketEvent *TLS_Listen_Set; /* TLS/TCP sockets and events */ 179 #endif /* !DISABLE_TLS */ 180 int Initialized = 0; /* set when we have initialized ourselves */ 181 int ShuttingDown; /* set when we die() */ 182 int MarkInterval = 20 * 60; /* interval between marks in seconds */ 183 int MarkSeq = 0; /* mark sequence number */ 184 int SecureMode = 0; /* listen only on unix domain socks */ 185 int UseNameService = 1; /* make domain name queries */ 186 int NumForwards = 0; /* number of forwarding actions in conf file */ 187 char **LogPaths; /* array of pathnames to read messages from */ 188 int NoRepeat = 0; /* disable "repeated"; log always */ 189 int RemoteAddDate = 0; /* always add date to messages from network */ 190 int SyncKernel = 0; /* write kernel messages synchronously */ 191 int UniquePriority = 0; /* only log specified priority */ 192 int LogFacPri = 0; /* put facility and priority in log messages: */ 193 /* 0=no, 1=numeric, 2=names */ 194 bool BSDOutputFormat = true; /* if true emit traditional BSD Syslog lines, 195 * otherwise new syslog-protocol lines 196 * 197 * Open Issue: having a global flag is the 198 * easiest solution. If we get a more detailed 199 * config file this could/should be changed 200 * into a destination-specific flag. 201 * Most output code should be ready to handle 202 * this, it will only break some syslog-sign 203 * configurations (e.g. with SG="0"). 204 */ 205 char appname[] = "syslogd";/* the APPNAME for own messages */ 206 char *include_pid = NULL; /* include PID in own messages */ 207 208 209 /* init and setup */ 210 void usage(void) __attribute__((__noreturn__)); 211 void logpath_add(char ***, int *, int *, const char *); 212 void logpath_fileadd(char ***, int *, int *, const char *); 213 void init(int fd, short event, void *ev); /* SIGHUP kevent dispatch routine */ 214 struct socketEvent* 215 socksetup(int, const char *); 216 int getmsgbufsize(void); 217 char *getLocalFQDN(void); 218 void trim_anydomain(char *); 219 /* pipe & subprocess handling */ 220 int p_open(char *, pid_t *); 221 void deadq_enter(pid_t, const char *); 222 int deadq_remove(pid_t); 223 void log_deadchild(pid_t, int, const char *); 224 void reapchild(int fd, short event, void *ev); /* SIGCHLD kevent dispatch routine */ 225 /* input message parsing & formatting */ 226 const char *cvthname(struct sockaddr_storage *); 227 void printsys(char *); 228 struct buf_msg *printline_syslogprotocol(const char*, char*, int, int); 229 struct buf_msg *printline_bsdsyslog(const char*, char*, int, int); 230 struct buf_msg *printline_kernelprintf(const char*, char*, int, int); 231 size_t check_timestamp(unsigned char *, char **, bool, bool); 232 char *copy_utf8_ascii(char*, size_t); 233 uint_fast32_t get_utf8_value(const char*); 234 unsigned valid_utf8(const char *); 235 static unsigned check_sd(char*); 236 static unsigned check_msgid(char *); 237 /* event handling */ 238 static void dispatch_read_klog(int fd, short event, void *ev); 239 static void dispatch_read_finet(int fd, short event, void *ev); 240 static void dispatch_read_funix(int fd, short event, void *ev); 241 static void domark(int fd, short event, void *ev); /* timer kevent dispatch routine */ 242 /* log messages */ 243 void logmsg_async(int, const char *, const char *, int); 244 void logmsg(struct buf_msg *); 245 int matches_spec(const char *, const char *, 246 char *(*)(const char *, const char *)); 247 void udp_send(struct filed *, char *, size_t); 248 void wallmsg(struct filed *, struct iovec *, size_t); 249 /* buffer & queue functions */ 250 size_t message_queue_purge(struct filed *f, size_t, int); 251 size_t message_allqueues_check(void); 252 static struct buf_queue * 253 find_qentry_to_delete(const struct buf_queue_head *, int, bool); 254 struct buf_queue * 255 message_queue_add(struct filed *, struct buf_msg *); 256 size_t buf_queue_obj_size(struct buf_queue*); 257 /* configuration & parsing */ 258 void cfline(size_t, const char *, struct filed *, const char *, 259 const char *); 260 void read_config_file(FILE*, struct filed**); 261 void store_sign_delim_sg2(char*); 262 int decode(const char *, CODE *); 263 bool copy_config_value(const char *, char **, const char **, 264 const char *, int); 265 bool copy_config_value_word(char **, const char **); 266 267 /* config parsing */ 268 #ifndef DISABLE_TLS 269 void free_cred_SLIST(struct peer_cred_head *); 270 static inline void 271 free_incoming_tls_sockets(void); 272 #endif /* !DISABLE_TLS */ 273 static int writev1(int, struct iovec *, size_t); 274 275 /* for make_timestamp() */ 276 #define TIMESTAMPBUFSIZE 35 277 char timestamp[TIMESTAMPBUFSIZE]; 278 279 /* 280 * Global line buffer. Since we only process one event at a time, 281 * a global one will do. But for klog, we use own buffer so that 282 * partial line at the end of buffer can be deferred. 283 */ 284 char *linebuf, *klog_linebuf; 285 size_t linebufsize, klog_linebufoff; 286 287 static const char *bindhostname = NULL; 288 289 #ifndef DISABLE_TLS 290 struct TLS_Incoming TLS_Incoming_Head = \ 291 SLIST_HEAD_INITIALIZER(TLS_Incoming_Head); 292 extern char *SSL_ERRCODE[]; 293 struct tls_global_options_t tls_opt; 294 #endif /* !DISABLE_TLS */ 295 296 int 297 main(int argc, char *argv[]) 298 { 299 int ch, j, fklog; 300 int funixsize = 0, funixmaxsize = 0; 301 struct sockaddr_un sunx; 302 char **pp; 303 struct event *ev; 304 uid_t uid = 0; 305 gid_t gid = 0; 306 char *user = NULL; 307 char *group = NULL; 308 const char *root = "/"; 309 char *endp; 310 struct group *gr; 311 struct passwd *pw; 312 unsigned long l; 313 314 /* should we set LC_TIME="C" to ensure correct timestamps&parsing? */ 315 (void)setlocale(LC_ALL, ""); 316 317 while ((ch = getopt(argc, argv, "b:dnsSf:m:o:p:P:ru:g:t:TUv")) != -1) 318 switch(ch) { 319 case 'b': 320 bindhostname = optarg; 321 break; 322 case 'd': /* debug */ 323 Debug = D_DEFAULT; 324 /* is there a way to read the integer value 325 * for Debug as an optional argument? */ 326 break; 327 case 'f': /* configuration file */ 328 ConfFile = optarg; 329 break; 330 case 'g': 331 group = optarg; 332 if (*group == '\0') 333 usage(); 334 break; 335 case 'm': /* mark interval */ 336 MarkInterval = atoi(optarg) * 60; 337 break; 338 case 'n': /* turn off DNS queries */ 339 UseNameService = 0; 340 break; 341 case 'o': /* message format */ 342 #define EQ(a) (strncmp(optarg, # a, sizeof(# a) - 1) == 0) 343 if (EQ(bsd) || EQ(rfc3264)) 344 BSDOutputFormat = true; 345 else if (EQ(syslog) || EQ(rfc5424)) 346 BSDOutputFormat = false; 347 else 348 usage(); 349 /* TODO: implement additional output option "osyslog" 350 * for old syslogd behaviour as introduced after 351 * FreeBSD PR#bin/7055. 352 */ 353 break; 354 case 'p': /* path */ 355 logpath_add(&LogPaths, &funixsize, 356 &funixmaxsize, optarg); 357 break; 358 case 'P': /* file of paths */ 359 logpath_fileadd(&LogPaths, &funixsize, 360 &funixmaxsize, optarg); 361 break; 362 case 'r': /* disable "repeated" compression */ 363 NoRepeat++; 364 break; 365 case 's': /* no network listen mode */ 366 SecureMode++; 367 break; 368 case 'S': 369 SyncKernel = 1; 370 break; 371 case 't': 372 root = optarg; 373 if (*root == '\0') 374 usage(); 375 break; 376 case 'T': 377 RemoteAddDate = 1; 378 break; 379 case 'u': 380 user = optarg; 381 if (*user == '\0') 382 usage(); 383 break; 384 case 'U': /* only log specified priority */ 385 UniquePriority = 1; 386 break; 387 case 'v': /* log facility and priority */ 388 if (LogFacPri < 2) 389 LogFacPri++; 390 break; 391 default: 392 usage(); 393 } 394 if ((argc -= optind) != 0) 395 usage(); 396 397 setlinebuf(stdout); 398 tzset(); /* init TZ information for localtime. */ 399 400 if (user != NULL) { 401 if (isdigit((unsigned char)*user)) { 402 errno = 0; 403 endp = NULL; 404 l = strtoul(user, &endp, 0); 405 if (errno || *endp != '\0') 406 goto getuser; 407 uid = (uid_t)l; 408 if (uid != l) {/* TODO: never executed */ 409 errno = 0; 410 logerror("UID out of range"); 411 die(0, 0, NULL); 412 } 413 } else { 414 getuser: 415 if ((pw = getpwnam(user)) != NULL) { 416 uid = pw->pw_uid; 417 } else { 418 errno = 0; 419 logerror("Cannot find user `%s'", user); 420 die(0, 0, NULL); 421 } 422 } 423 } 424 425 if (group != NULL) { 426 if (isdigit((unsigned char)*group)) { 427 errno = 0; 428 endp = NULL; 429 l = strtoul(group, &endp, 0); 430 if (errno || *endp != '\0') 431 goto getgroup; 432 gid = (gid_t)l; 433 if (gid != l) {/* TODO: never executed */ 434 errno = 0; 435 logerror("GID out of range"); 436 die(0, 0, NULL); 437 } 438 } else { 439 getgroup: 440 if ((gr = getgrnam(group)) != NULL) { 441 gid = gr->gr_gid; 442 } else { 443 errno = 0; 444 logerror("Cannot find group `%s'", group); 445 die(0, 0, NULL); 446 } 447 } 448 } 449 450 if (access(root, F_OK | R_OK)) { 451 logerror("Cannot access `%s'", root); 452 die(0, 0, NULL); 453 } 454 455 consfile.f_type = F_CONSOLE; 456 (void)strlcpy(consfile.f_un.f_fname, ctty, 457 sizeof(consfile.f_un.f_fname)); 458 linebufsize = getmsgbufsize(); 459 if (linebufsize < MAXLINE) 460 linebufsize = MAXLINE; 461 linebufsize++; 462 463 if (!(linebuf = malloc(linebufsize))) { 464 logerror("Couldn't allocate buffer"); 465 die(0, 0, NULL); 466 } 467 if (!(klog_linebuf = malloc(linebufsize))) { 468 logerror("Couldn't allocate buffer for klog"); 469 die(0, 0, NULL); 470 } 471 472 473 #ifndef SUN_LEN 474 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 475 #endif 476 if (funixsize == 0) 477 logpath_add(&LogPaths, &funixsize, 478 &funixmaxsize, _PATH_LOG); 479 funix = malloc(sizeof(*funix) * funixsize); 480 if (funix == NULL) { 481 logerror("Couldn't allocate funix descriptors"); 482 die(0, 0, NULL); 483 } 484 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 485 DPRINTF(D_NET, "Making unix dgram socket `%s'\n", *pp); 486 unlink(*pp); 487 memset(&sunx, 0, sizeof(sunx)); 488 sunx.sun_family = AF_LOCAL; 489 (void)strncpy(sunx.sun_path, *pp, sizeof(sunx.sun_path)); 490 funix[j] = socket(AF_LOCAL, SOCK_DGRAM, 0); 491 if (funix[j] < 0 || bind(funix[j], 492 (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 || 493 chmod(*pp, 0666) < 0) { 494 logerror("Cannot create `%s'", *pp); 495 die(0, 0, NULL); 496 } 497 DPRINTF(D_NET, "Listening on unix dgram socket `%s'\n", *pp); 498 } 499 500 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) < 0) { 501 DPRINTF(D_FILE, "Can't open `%s' (%d)\n", _PATH_KLOG, errno); 502 } else { 503 DPRINTF(D_FILE, "Listening on kernel log `%s' with fd %d\n", 504 _PATH_KLOG, fklog); 505 } 506 507 #if (!defined(DISABLE_TLS) && !defined(DISABLE_SIGN)) 508 /* basic OpenSSL init */ 509 SSL_load_error_strings(); 510 (void) SSL_library_init(); 511 OpenSSL_add_all_digests(); 512 /* OpenSSL PRNG needs /dev/urandom, thus initialize before chroot() */ 513 if (!RAND_status()) { 514 errno = 0; 515 logerror("Unable to initialize OpenSSL PRNG"); 516 } else { 517 DPRINTF(D_TLS, "Initializing PRNG\n"); 518 } 519 #endif /* (!defined(DISABLE_TLS) && !defined(DISABLE_SIGN)) */ 520 #ifndef DISABLE_SIGN 521 /* initialize rsid -- we will use that later to determine 522 * whether sign_global_init() was already called */ 523 GlobalSign.rsid = 0; 524 #endif /* !DISABLE_SIGN */ 525 #if (IETF_NUM_PRIVALUES != (LOG_NFACILITIES<<3)) 526 logerror("Warning: system defines %d priority values, but " 527 "syslog-protocol/syslog-sign specify %d values", 528 LOG_NFACILITIES, SIGN_NUM_PRIVALS); 529 #endif 530 531 /* 532 * All files are open, we can drop privileges and chroot 533 */ 534 DPRINTF(D_MISC, "Attempt to chroot to `%s'\n", root); 535 if (chroot(root) == -1) { 536 logerror("Failed to chroot to `%s'", root); 537 die(0, 0, NULL); 538 } 539 DPRINTF(D_MISC, "Attempt to set GID/EGID to `%d'\n", gid); 540 if (setgid(gid) || setegid(gid)) { 541 logerror("Failed to set gid to `%d'", gid); 542 die(0, 0, NULL); 543 } 544 DPRINTF(D_MISC, "Attempt to set UID/EUID to `%d'\n", uid); 545 if (setuid(uid) || seteuid(uid)) { 546 logerror("Failed to set uid to `%d'", uid); 547 die(0, 0, NULL); 548 } 549 /* 550 * We cannot detach from the terminal before we are sure we won't 551 * have a fatal error, because error message would not go to the 552 * terminal and would not be logged because syslogd dies. 553 * All die() calls are behind us, we can call daemon() 554 */ 555 if (!Debug) { 556 (void)daemon(0, 0); 557 daemonized = 1; 558 /* tuck my process id away, if i'm not in debug mode */ 559 #ifdef __NetBSD_Version__ 560 pidfile(NULL); 561 #endif /* __NetBSD_Version__ */ 562 } 563 564 #define MAX_PID_LEN 5 565 include_pid = malloc(MAX_PID_LEN+1); 566 snprintf(include_pid, MAX_PID_LEN+1, "%d", getpid()); 567 568 /* 569 * Create the global kernel event descriptor. 570 * 571 * NOTE: We MUST do this after daemon(), bacause the kqueue() 572 * API dictates that kqueue descriptors are not inherited 573 * across forks (lame!). 574 */ 575 (void)event_init(); 576 577 /* 578 * We must read the configuration file for the first time 579 * after the kqueue descriptor is created, because we install 580 * events during this process. 581 */ 582 init(0, 0, NULL); 583 584 /* 585 * Always exit on SIGTERM. Also exit on SIGINT and SIGQUIT 586 * if we're debugging. 587 */ 588 (void)signal(SIGTERM, SIG_IGN); 589 (void)signal(SIGINT, SIG_IGN); 590 (void)signal(SIGQUIT, SIG_IGN); 591 592 ev = allocev(); 593 signal_set(ev, SIGTERM, die, ev); 594 EVENT_ADD(ev); 595 596 if (Debug) { 597 ev = allocev(); 598 signal_set(ev, SIGINT, die, ev); 599 EVENT_ADD(ev); 600 ev = allocev(); 601 signal_set(ev, SIGQUIT, die, ev); 602 EVENT_ADD(ev); 603 } 604 605 ev = allocev(); 606 signal_set(ev, SIGCHLD, reapchild, ev); 607 EVENT_ADD(ev); 608 609 ev = allocev(); 610 schedule_event(&ev, 611 &((struct timeval){TIMERINTVL, 0}), 612 domark, ev); 613 614 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */ 615 616 /* Re-read configuration on SIGHUP. */ 617 (void) signal(SIGHUP, SIG_IGN); 618 ev = allocev(); 619 signal_set(ev, SIGHUP, init, ev); 620 EVENT_ADD(ev); 621 622 #ifndef DISABLE_TLS 623 ev = allocev(); 624 signal_set(ev, SIGUSR1, dispatch_force_tls_reconnect, ev); 625 EVENT_ADD(ev); 626 #endif /* !DISABLE_TLS */ 627 628 if (fklog >= 0) { 629 ev = allocev(); 630 DPRINTF(D_EVENT, 631 "register klog for fd %d with ev@%p\n", fklog, ev); 632 event_set(ev, fklog, EV_READ | EV_PERSIST, 633 dispatch_read_klog, ev); 634 EVENT_ADD(ev); 635 } 636 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 637 ev = allocev(); 638 event_set(ev, funix[j], EV_READ | EV_PERSIST, 639 dispatch_read_funix, ev); 640 EVENT_ADD(ev); 641 } 642 643 DPRINTF(D_MISC, "Off & running....\n"); 644 645 j = event_dispatch(); 646 /* normal termination via die(), reaching this is an error */ 647 DPRINTF(D_MISC, "event_dispatch() returned %d\n", j); 648 die(0, 0, NULL); 649 /*NOTREACHED*/ 650 return 0; 651 } 652 653 void 654 usage(void) 655 { 656 657 (void)fprintf(stderr, 658 "usage: %s [-dnrSsTUv] [-b bind_address] [-f config_file] [-g group]\n" 659 "\t[-m mark_interval] [-P file_list] [-p log_socket\n" 660 "\t[-p log_socket2 ...]] [-t chroot_dir] [-u user]\n", 661 getprogname()); 662 exit(1); 663 } 664 665 /* 666 * Dispatch routine for reading /dev/klog 667 * 668 * Note: slightly different semantic in dispatch_read functions: 669 * - read_klog() might give multiple messages in linebuf and 670 * leaves the task of splitting them to printsys() 671 * - all other read functions receive one message and 672 * then call printline() with one buffer. 673 */ 674 static void 675 dispatch_read_klog(int fd, short event, void *ev) 676 { 677 ssize_t rv; 678 size_t resid = linebufsize - klog_linebufoff; 679 680 DPRINTF((D_CALL|D_EVENT), "Kernel log active (%d, %d, %p)" 681 " with linebuf@%p, length %zu)\n", fd, event, ev, 682 klog_linebuf, linebufsize); 683 684 rv = read(fd, &klog_linebuf[klog_linebufoff], resid - 1); 685 if (rv > 0) { 686 klog_linebuf[klog_linebufoff + rv] = '\0'; 687 printsys(klog_linebuf); 688 } else if (rv < 0 && errno != EINTR) { 689 /* 690 * /dev/klog has croaked. Disable the event 691 * so it won't bother us again. 692 */ 693 logerror("klog failed"); 694 event_del(ev); 695 } 696 } 697 698 /* 699 * Dispatch routine for reading Unix domain sockets. 700 */ 701 static void 702 dispatch_read_funix(int fd, short event, void *ev) 703 { 704 struct sockaddr_un myname, fromunix; 705 ssize_t rv; 706 socklen_t sunlen; 707 708 sunlen = sizeof(myname); 709 if (getsockname(fd, (struct sockaddr *)&myname, &sunlen) != 0) { 710 /* 711 * This should never happen, so ensure that it doesn't 712 * happen again. 713 */ 714 logerror("getsockname() unix failed"); 715 event_del(ev); 716 return; 717 } 718 719 DPRINTF((D_CALL|D_EVENT|D_NET), "Unix socket (%.*s) active (%d, %d %p)" 720 " with linebuf@%p, size %zu)\n", (int)(myname.sun_len 721 - sizeof(myname.sun_len) - sizeof(myname.sun_family)), 722 myname.sun_path, fd, event, ev, linebuf, linebufsize-1); 723 724 sunlen = sizeof(fromunix); 725 rv = recvfrom(fd, linebuf, linebufsize-1, 0, 726 (struct sockaddr *)&fromunix, &sunlen); 727 if (rv > 0) { 728 linebuf[rv] = '\0'; 729 printline(LocalFQDN, linebuf, 0); 730 } else if (rv < 0 && errno != EINTR) { 731 logerror("recvfrom() unix `%.*s'", 732 myname.sun_len, myname.sun_path); 733 } 734 } 735 736 /* 737 * Dispatch routine for reading Internet sockets. 738 */ 739 static void 740 dispatch_read_finet(int fd, short event, void *ev) 741 { 742 #ifdef LIBWRAP 743 struct request_info req; 744 #endif 745 struct sockaddr_storage frominet; 746 ssize_t rv; 747 socklen_t len; 748 int reject = 0; 749 750 DPRINTF((D_CALL|D_EVENT|D_NET), "inet socket active (%d, %d %p) " 751 " with linebuf@%p, size %zu)\n", 752 fd, event, ev, linebuf, linebufsize-1); 753 754 #ifdef LIBWRAP 755 request_init(&req, RQ_DAEMON, appname, RQ_FILE, fd, NULL); 756 fromhost(&req); 757 reject = !hosts_access(&req); 758 if (reject) 759 DPRINTF(D_NET, "access denied\n"); 760 #endif 761 762 len = sizeof(frominet); 763 rv = recvfrom(fd, linebuf, linebufsize-1, 0, 764 (struct sockaddr *)&frominet, &len); 765 if (rv == 0 || (rv < 0 && errno == EINTR)) 766 return; 767 else if (rv < 0) { 768 logerror("recvfrom inet"); 769 return; 770 } 771 772 linebuf[rv] = '\0'; 773 if (!reject) 774 printline(cvthname(&frominet), linebuf, 775 RemoteAddDate ? ADDDATE : 0); 776 } 777 778 /* 779 * given a pointer to an array of char *'s, a pointer to its current 780 * size and current allocated max size, and a new char * to add, add 781 * it, update everything as necessary, possibly allocating a new array 782 */ 783 void 784 logpath_add(char ***lp, int *szp, int *maxszp, const char *new) 785 { 786 char **nlp; 787 int newmaxsz; 788 789 DPRINTF(D_FILE, "Adding `%s' to the %p logpath list\n", new, *lp); 790 if (*szp == *maxszp) { 791 if (*maxszp == 0) { 792 newmaxsz = 4; /* start of with enough for now */ 793 *lp = NULL; 794 } else 795 newmaxsz = *maxszp * 2; 796 nlp = realloc(*lp, sizeof(char *) * (newmaxsz + 1)); 797 if (nlp == NULL) { 798 logerror("Couldn't allocate line buffer"); 799 die(0, 0, NULL); 800 } 801 *lp = nlp; 802 *maxszp = newmaxsz; 803 } 804 if (((*lp)[(*szp)++] = strdup(new)) == NULL) { 805 logerror("Couldn't allocate logpath"); 806 die(0, 0, NULL); 807 } 808 (*lp)[(*szp)] = NULL; /* always keep it NULL terminated */ 809 } 810 811 /* do a file of log sockets */ 812 void 813 logpath_fileadd(char ***lp, int *szp, int *maxszp, const char *file) 814 { 815 FILE *fp; 816 char *line; 817 size_t len; 818 819 fp = fopen(file, "r"); 820 if (fp == NULL) { 821 logerror("Could not open socket file list `%s'", file); 822 die(0, 0, NULL); 823 } 824 825 while ((line = fgetln(fp, &len)) != NULL) { 826 line[len - 1] = 0; 827 logpath_add(lp, szp, maxszp, line); 828 } 829 fclose(fp); 830 } 831 832 /* 833 * checks UTF-8 codepoint 834 * returns either its length in bytes or 0 if *input is invalid 835 */ 836 unsigned 837 valid_utf8(const char *c) { 838 unsigned rc, nb; 839 840 /* first byte gives sequence length */ 841 if ((*c & 0x80) == 0x00) return 1; /* 0bbbbbbb -- ASCII */ 842 else if ((*c & 0xc0) == 0x80) return 0; /* 10bbbbbb -- trailing byte */ 843 else if ((*c & 0xe0) == 0xc0) nb = 2; /* 110bbbbb */ 844 else if ((*c & 0xf0) == 0xe0) nb = 3; /* 1110bbbb */ 845 else if ((*c & 0xf8) == 0xf0) nb = 4; /* 11110bbb */ 846 else return 0; /* UTF-8 allows only up to 4 bytes */ 847 848 /* catch overlong encodings */ 849 if ((*c & 0xfe) == 0xc0) 850 return 0; /* 1100000b ... */ 851 else if (((*c & 0xff) == 0xe0) && ((*(c+1) & 0xe0) == 0x80)) 852 return 0; /* 11100000 100bbbbb ... */ 853 else if (((*c & 0xff) == 0xf0) && ((*(c+1) & 0xf0) == 0x80)) 854 return 0; /* 11110000 1000bbbb ... ... */ 855 856 /* and also filter UTF-16 surrogates (=invalid in UTF-8) */ 857 if (((*c & 0xff) == 0xed) && ((*(c+1) & 0xe0) == 0xa0)) 858 return 0; /* 11101101 101bbbbb ... */ 859 860 rc = nb; 861 /* check trailing bytes */ 862 switch (nb) { 863 default: return 0; 864 case 4: if ((*(c+3) & 0xc0) != 0x80) return 0; /*FALLTHROUGH*/ 865 case 3: if ((*(c+2) & 0xc0) != 0x80) return 0; /*FALLTHROUGH*/ 866 case 2: if ((*(c+1) & 0xc0) != 0x80) return 0; /*FALLTHROUGH*/ 867 } 868 return rc; 869 } 870 #define UTF8CHARMAX 4 871 872 /* 873 * read UTF-8 value 874 * returns a the codepoint number 875 */ 876 uint_fast32_t 877 get_utf8_value(const char *c) { 878 uint_fast32_t sum; 879 unsigned nb, i; 880 881 /* first byte gives sequence length */ 882 if ((*c & 0x80) == 0x00) return *c;/* 0bbbbbbb -- ASCII */ 883 else if ((*c & 0xc0) == 0x80) return 0; /* 10bbbbbb -- trailing byte */ 884 else if ((*c & 0xe0) == 0xc0) { /* 110bbbbb */ 885 nb = 2; 886 sum = (*c & ~0xe0) & 0xff; 887 } else if ((*c & 0xf0) == 0xe0) { /* 1110bbbb */ 888 nb = 3; 889 sum = (*c & ~0xf0) & 0xff; 890 } else if ((*c & 0xf8) == 0xf0) { /* 11110bbb */ 891 nb = 4; 892 sum = (*c & ~0xf8) & 0xff; 893 } else return 0; /* UTF-8 allows only up to 4 bytes */ 894 895 /* check trailing bytes -- 10bbbbbb */ 896 i = 1; 897 while (i < nb) { 898 sum <<= 6; 899 sum |= ((*(c+i) & ~0xc0) & 0xff); 900 i++; 901 } 902 return sum; 903 } 904 905 /* note previous versions transscribe 906 * control characters, e.g. \007 --> "^G" 907 * did anyone rely on that? 908 * 909 * this new version works on only one buffer and 910 * replaces control characters with a space 911 */ 912 #define NEXTFIELD(ptr) if (*(p) == ' ') (p)++; /* SP */ \ 913 else { \ 914 DPRINTF(D_DATA, "format error\n"); \ 915 if (*(p) == '\0') start = (p); \ 916 goto all_syslog_msg; \ 917 } 918 #define FORCE2ASCII(c) ((iscntrl((unsigned char)(c)) && (c) != '\t') \ 919 ? ((c) == '\n' ? ' ' : '?') \ 920 : (c) & 0177) 921 922 /* following syslog-protocol */ 923 #define printusascii(ch) (ch >= 33 && ch <= 126) 924 #define sdname(ch) (ch != '=' && ch != ' ' \ 925 && ch != ']' && ch != '"' \ 926 && printusascii(ch)) 927 928 /* checks whether the first word of string p can be interpreted as 929 * a syslog-protocol MSGID and if so returns its length. 930 * 931 * otherwise returns 0 932 */ 933 static unsigned 934 check_msgid(char *p) 935 { 936 char *q = p; 937 938 /* consider the NILVALUE to be valid */ 939 if (*q == '-' && *(q+1) == ' ') 940 return 1; 941 942 for (;;) { 943 if (*q == ' ') 944 return q - p; 945 else if (*q == '\0' || !printusascii(*q) || q - p >= MSGID_MAX) 946 return 0; 947 else 948 q++; 949 } 950 } 951 952 /* 953 * returns number of chars found in SD at beginning of string p 954 * thus returns 0 if no valid SD is found 955 * 956 * if ascii == true then substitute all non-ASCII chars 957 * otherwise use syslog-protocol rules to allow UTF-8 in values 958 * note: one pass for filtering and scanning, so a found SD 959 * is always filtered, but an invalid one could be partially 960 * filtered up to the format error. 961 */ 962 static unsigned 963 check_sd(char* p) 964 { 965 char *q = p; 966 bool esc = false; 967 968 /* consider the NILVALUE to be valid */ 969 if (*q == '-' && (*(q+1) == ' ' || *(q+1) == '\0')) 970 return 1; 971 972 for(;;) { /* SD-ELEMENT */ 973 if (*q++ != '[') return 0; 974 /* SD-ID */ 975 if (!sdname(*q)) return 0; 976 while (sdname(*q)) { 977 *q = FORCE2ASCII(*q); 978 q++; 979 } 980 for(;;) { /* SD-PARAM */ 981 if (*q == ']') { 982 q++; 983 if (*q == ' ' || *q == '\0') return q - p; 984 else if (*q == '[') break; 985 } else if (*q++ != ' ') return 0; 986 987 /* PARAM-NAME */ 988 if (!sdname(*q)) return 0; 989 while (sdname(*q)) { 990 *q = FORCE2ASCII(*q); 991 q++; 992 } 993 994 if (*q++ != '=') return 0; 995 if (*q++ != '"') return 0; 996 997 for(;;) { /* PARAM-VALUE */ 998 if (esc) { 999 esc = false; 1000 if (*q == '\\' || *q == '"' || 1001 *q == ']') { 1002 q++; 1003 continue; 1004 } 1005 /* no else because invalid 1006 * escape sequences are accepted */ 1007 } 1008 else if (*q == '"') break; 1009 else if (*q == '\0' || *q == ']') return 0; 1010 else if (*q == '\\') esc = true; 1011 else { 1012 int i; 1013 i = valid_utf8(q); 1014 if (i == 0) 1015 *q = '?'; 1016 else if (i == 1) 1017 *q = FORCE2ASCII(*q); 1018 else /* multi byte char */ 1019 q += (i-1); 1020 } 1021 q++; 1022 } 1023 q++; 1024 } 1025 } 1026 } 1027 1028 struct buf_msg * 1029 printline_syslogprotocol(const char *hname, char *msg, 1030 int flags, int pri) 1031 { 1032 struct buf_msg *buffer; 1033 char *p, *start; 1034 unsigned sdlen = 0, i = 0; 1035 bool utf8allowed = false; /* for some fields */ 1036 1037 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_syslogprotocol(" 1038 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1039 1040 buffer = buf_msg_new(0); 1041 p = msg; 1042 p += check_timestamp((unsigned char*) p, 1043 &buffer->timestamp, true, !BSDOutputFormat); 1044 DPRINTF(D_DATA, "Got timestamp \"%s\"\n", buffer->timestamp); 1045 1046 if (flags & ADDDATE) { 1047 FREEPTR(buffer->timestamp); 1048 buffer->timestamp = strdup(make_timestamp(NULL, 1049 !BSDOutputFormat)); 1050 } 1051 1052 start = p; 1053 NEXTFIELD(p); 1054 /* extract host */ 1055 for (start = p;; p++) { 1056 if ((*p == ' ' || *p == '\0') 1057 && start == p-1 && *(p-1) == '-') { 1058 /* NILVALUE */ 1059 break; 1060 } else if ((*p == ' ' || *p == '\0') 1061 && (start != p-1 || *(p-1) != '-')) { 1062 buffer->host = strndup(start, p - start); 1063 break; 1064 } else { 1065 *p = FORCE2ASCII(*p); 1066 } 1067 } 1068 /* p @ SP after host */ 1069 DPRINTF(D_DATA, "Got host \"%s\"\n", buffer->host); 1070 1071 /* extract app-name */ 1072 NEXTFIELD(p); 1073 for (start = p;; p++) { 1074 if ((*p == ' ' || *p == '\0') 1075 && start == p-1 && *(p-1) == '-') { 1076 /* NILVALUE */ 1077 break; 1078 } else if ((*p == ' ' || *p == '\0') 1079 && (start != p-1 || *(p-1) != '-')) { 1080 buffer->prog = strndup(start, p - start); 1081 break; 1082 } else { 1083 *p = FORCE2ASCII(*p); 1084 } 1085 } 1086 DPRINTF(D_DATA, "Got prog \"%s\"\n", buffer->prog); 1087 1088 /* extract procid */ 1089 NEXTFIELD(p); 1090 for (start = p;; p++) { 1091 if ((*p == ' ' || *p == '\0') 1092 && start == p-1 && *(p-1) == '-') { 1093 /* NILVALUE */ 1094 break; 1095 } else if ((*p == ' ' || *p == '\0') 1096 && (start != p-1 || *(p-1) != '-')) { 1097 buffer->pid = strndup(start, p - start); 1098 start = p; 1099 break; 1100 } else { 1101 *p = FORCE2ASCII(*p); 1102 } 1103 } 1104 DPRINTF(D_DATA, "Got pid \"%s\"\n", buffer->pid); 1105 1106 /* extract msgid */ 1107 NEXTFIELD(p); 1108 for (start = p;; p++) { 1109 if ((*p == ' ' || *p == '\0') 1110 && start == p-1 && *(p-1) == '-') { 1111 /* NILVALUE */ 1112 start = p+1; 1113 break; 1114 } else if ((*p == ' ' || *p == '\0') 1115 && (start != p-1 || *(p-1) != '-')) { 1116 buffer->msgid = strndup(start, p - start); 1117 start = p+1; 1118 break; 1119 } else { 1120 *p = FORCE2ASCII(*p); 1121 } 1122 } 1123 DPRINTF(D_DATA, "Got msgid \"%s\"\n", buffer->msgid); 1124 1125 /* extract SD */ 1126 NEXTFIELD(p); 1127 start = p; 1128 sdlen = check_sd(p); 1129 DPRINTF(D_DATA, "check_sd(\"%s\") returned %d\n", p, sdlen); 1130 1131 if (sdlen == 1 && *p == '-') { 1132 /* NILVALUE */ 1133 p++; 1134 } else if (sdlen > 1) { 1135 buffer->sd = strndup(p, sdlen); 1136 p += sdlen; 1137 } else { 1138 DPRINTF(D_DATA, "format error\n"); 1139 } 1140 if (*p == '\0') start = p; 1141 else if (*p == ' ') start = ++p; /* SP */ 1142 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1143 1144 /* and now the message itself 1145 * note: move back to last start to check for BOM 1146 */ 1147 all_syslog_msg: 1148 p = start; 1149 1150 /* check for UTF-8-BOM */ 1151 if (IS_BOM(p)) { 1152 DPRINTF(D_DATA, "UTF-8 BOM\n"); 1153 utf8allowed = true; 1154 p += 3; 1155 } 1156 1157 if (*p != '\0' && !utf8allowed) { 1158 size_t msglen; 1159 1160 msglen = strlen(p); 1161 assert(!buffer->msg); 1162 buffer->msg = copy_utf8_ascii(p, msglen); 1163 buffer->msgorig = buffer->msg; 1164 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1165 } else if (*p != '\0' && utf8allowed) { 1166 while (*p != '\0') { 1167 i = valid_utf8(p); 1168 if (i == 0) 1169 *p++ = '?'; 1170 else if (i == 1) 1171 *p = FORCE2ASCII(*p); 1172 p += i; 1173 } 1174 assert(p != start); 1175 assert(!buffer->msg); 1176 buffer->msg = strndup(start, p - start); 1177 buffer->msgorig = buffer->msg; 1178 buffer->msglen = buffer->msgsize = 1 + p - start; 1179 } 1180 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1181 1182 buffer->recvhost = strdup(hname); 1183 buffer->pri = pri; 1184 buffer->flags = flags; 1185 1186 return buffer; 1187 } 1188 1189 /* copies an input into a new ASCII buffer 1190 * ASCII controls are converted to format "^X" 1191 * multi-byte UTF-8 chars are converted to format "<ab><cd>" 1192 */ 1193 #define INIT_BUFSIZE 512 1194 char * 1195 copy_utf8_ascii(char *p, size_t p_len) 1196 { 1197 size_t idst = 0, isrc = 0, dstsize = INIT_BUFSIZE, i; 1198 char *dst, *tmp_dst; 1199 1200 MALLOC(dst, dstsize); 1201 while (isrc < p_len) { 1202 if (dstsize < idst + 10) { 1203 /* check for enough space for \0 and a UTF-8 1204 * conversion; longest possible is <U+123456> */ 1205 tmp_dst = realloc(dst, dstsize + INIT_BUFSIZE); 1206 if (!tmp_dst) 1207 break; 1208 dst = tmp_dst; 1209 dstsize += INIT_BUFSIZE; 1210 } 1211 1212 i = valid_utf8(&p[isrc]); 1213 if (i == 0) { /* invalid encoding */ 1214 dst[idst++] = '?'; 1215 isrc++; 1216 } else if (i == 1) { /* check printable */ 1217 if (iscntrl((unsigned char)p[isrc]) 1218 && p[isrc] != '\t') { 1219 if (p[isrc] == '\n') { 1220 dst[idst++] = ' '; 1221 isrc++; 1222 } else { 1223 dst[idst++] = '^'; 1224 dst[idst++] = p[isrc++] ^ 0100; 1225 } 1226 } else 1227 dst[idst++] = p[isrc++]; 1228 } else { /* convert UTF-8 to ASCII */ 1229 dst[idst++] = '<'; 1230 idst += snprintf(&dst[idst], dstsize - idst, "U+%x", 1231 get_utf8_value(&p[isrc])); 1232 isrc += i; 1233 dst[idst++] = '>'; 1234 } 1235 } 1236 dst[idst] = '\0'; 1237 1238 /* shrink buffer to right size */ 1239 tmp_dst = realloc(dst, idst+1); 1240 if (tmp_dst) 1241 return tmp_dst; 1242 else 1243 return dst; 1244 } 1245 1246 struct buf_msg * 1247 printline_bsdsyslog(const char *hname, char *msg, 1248 int flags, int pri) 1249 { 1250 struct buf_msg *buffer; 1251 char *p, *start; 1252 unsigned msgidlen = 0, sdlen = 0; 1253 1254 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_bsdsyslog(" 1255 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1256 1257 buffer = buf_msg_new(0); 1258 p = msg; 1259 p += check_timestamp((unsigned char*) p, 1260 &buffer->timestamp, false, !BSDOutputFormat); 1261 DPRINTF(D_DATA, "Got timestamp \"%s\"\n", buffer->timestamp); 1262 1263 if (flags & ADDDATE || !buffer->timestamp) { 1264 FREEPTR(buffer->timestamp); 1265 buffer->timestamp = strdup(make_timestamp(NULL, 1266 !BSDOutputFormat)); 1267 } 1268 1269 if (*p == ' ') p++; /* SP */ 1270 else goto all_bsd_msg; 1271 /* in any error case we skip header parsing and 1272 * treat all following data as message content */ 1273 1274 /* extract host */ 1275 for (start = p;; p++) { 1276 if (*p == ' ' || *p == '\0') { 1277 buffer->host = strndup(start, p - start); 1278 break; 1279 } else if (*p == '[' || (*p == ':' 1280 && (*(p+1) == ' ' || *(p+1) == '\0'))) { 1281 /* no host in message */ 1282 buffer->host = LocalFQDN; 1283 buffer->prog = strndup(start, p - start); 1284 break; 1285 } else { 1286 *p = FORCE2ASCII(*p); 1287 } 1288 } 1289 DPRINTF(D_DATA, "Got host \"%s\"\n", buffer->host); 1290 /* p @ SP after host, or @ :/[ after prog */ 1291 1292 /* extract program */ 1293 if (!buffer->prog) { 1294 if (*p == ' ') p++; /* SP */ 1295 else goto all_bsd_msg; 1296 1297 for (start = p;; p++) { 1298 if (*p == ' ' || *p == '\0') { /* error */ 1299 goto all_bsd_msg; 1300 } else if (*p == '[' || (*p == ':' 1301 && (*(p+1) == ' ' || *(p+1) == '\0'))) { 1302 buffer->prog = strndup(start, p - start); 1303 break; 1304 } else { 1305 *p = FORCE2ASCII(*p); 1306 } 1307 } 1308 } 1309 DPRINTF(D_DATA, "Got prog \"%s\"\n", buffer->prog); 1310 start = p; 1311 1312 /* p @ :/[ after prog */ 1313 if (*p == '[') { 1314 p++; 1315 if (*p == ' ') p++; /* SP */ 1316 for (start = p;; p++) { 1317 if (*p == ' ' || *p == '\0') { /* error */ 1318 goto all_bsd_msg; 1319 } else if (*p == ']') { 1320 buffer->pid = strndup(start, p - start); 1321 break; 1322 } else { 1323 *p = FORCE2ASCII(*p); 1324 } 1325 } 1326 } 1327 DPRINTF(D_DATA, "Got pid \"%s\"\n", buffer->pid); 1328 1329 if (*p == ']') p++; 1330 if (*p == ':') p++; 1331 if (*p == ' ') p++; 1332 1333 /* p @ msgid, @ opening [ of SD or @ first byte of message 1334 * accept either case and try to detect MSGID and SD fields 1335 * 1336 * only limitation: we do not accept UTF-8 data in 1337 * BSD Syslog messages -- so all SD values are ASCII-filtered 1338 * 1339 * I have found one scenario with 'unexpected' behaviour: 1340 * if there is only a SD intended, but a) it is short enough 1341 * to be a MSGID and b) the first word of the message can also 1342 * be parsed as an SD. 1343 * example: 1344 * "<35>Jul 6 12:39:08 tag[123]: [exampleSDID@0] - hello" 1345 * --> parsed as 1346 * MSGID = "[exampleSDID@0]" 1347 * SD = "-" 1348 * MSG = "hello" 1349 */ 1350 start = p; 1351 msgidlen = check_msgid(p); 1352 if (msgidlen) /* check for SD in 2nd field */ 1353 sdlen = check_sd(p+msgidlen+1); 1354 1355 if (msgidlen && sdlen) { 1356 /* MSGID in 1st and SD in 2nd field 1357 * now check for NILVALUEs and copy */ 1358 if (msgidlen == 1 && *p == '-') { 1359 p++; /* - */ 1360 p++; /* SP */ 1361 DPRINTF(D_DATA, "Got MSGID \"-\"\n"); 1362 } else { 1363 /* only has ASCII chars after check_msgid() */ 1364 buffer->msgid = strndup(p, msgidlen); 1365 p += msgidlen; 1366 p++; /* SP */ 1367 DPRINTF(D_DATA, "Got MSGID \"%s\"\n", 1368 buffer->msgid); 1369 } 1370 } else { 1371 /* either no msgid or no SD in 2nd field 1372 * --> check 1st field for SD */ 1373 DPRINTF(D_DATA, "No MSGID\n"); 1374 sdlen = check_sd(p); 1375 } 1376 1377 if (sdlen == 0) { 1378 DPRINTF(D_DATA, "No SD\n"); 1379 } else if (sdlen > 1) { 1380 buffer->sd = copy_utf8_ascii(p, sdlen); 1381 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1382 } else if (sdlen == 1 && *p == '-') { 1383 p++; 1384 DPRINTF(D_DATA, "Got SD \"-\"\n"); 1385 } else { 1386 DPRINTF(D_DATA, "Error\n"); 1387 } 1388 1389 if (*p == ' ') p++; 1390 start = p; 1391 /* and now the message itself 1392 * note: do not reset start, because we might come here 1393 * by goto and want to have the incomplete field as part 1394 * of the msg 1395 */ 1396 all_bsd_msg: 1397 if (*p != '\0') { 1398 size_t msglen = strlen(p); 1399 buffer->msg = copy_utf8_ascii(p, msglen); 1400 buffer->msgorig = buffer->msg; 1401 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1402 } 1403 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1404 1405 buffer->recvhost = strdup(hname); 1406 buffer->pri = pri; 1407 buffer->flags = flags | BSDSYSLOG; 1408 1409 return buffer; 1410 } 1411 1412 struct buf_msg * 1413 printline_kernelprintf(const char *hname, char *msg, 1414 int flags, int pri) 1415 { 1416 struct buf_msg *buffer; 1417 char *p; 1418 unsigned sdlen = 0; 1419 1420 DPRINTF((D_CALL|D_BUFFER|D_DATA), "printline_kernelprintf(" 1421 "\"%s\", \"%s\", %d, %d)\n", hname, msg, flags, pri); 1422 1423 buffer = buf_msg_new(0); 1424 buffer->timestamp = strdup(make_timestamp(NULL, !BSDOutputFormat)); 1425 buffer->pri = pri; 1426 buffer->flags = flags; 1427 1428 /* assume there is no MSGID but there might be SD */ 1429 p = msg; 1430 sdlen = check_sd(p); 1431 1432 if (sdlen == 0) { 1433 DPRINTF(D_DATA, "No SD\n"); 1434 } else if (sdlen > 1) { 1435 buffer->sd = copy_utf8_ascii(p, sdlen); 1436 DPRINTF(D_DATA, "Got SD \"%s\"\n", buffer->sd); 1437 } else if (sdlen == 1 && *p == '-') { 1438 p++; 1439 DPRINTF(D_DATA, "Got SD \"-\"\n"); 1440 } else { 1441 DPRINTF(D_DATA, "Error\n"); 1442 } 1443 1444 if (*p == ' ') p++; 1445 if (*p != '\0') { 1446 size_t msglen = strlen(p); 1447 buffer->msg = copy_utf8_ascii(p, msglen); 1448 buffer->msgorig = buffer->msg; 1449 buffer->msglen = buffer->msgsize = strlen(buffer->msg)+1; 1450 } 1451 DPRINTF(D_DATA, "Got msg \"%s\"\n", buffer->msg); 1452 1453 return buffer; 1454 } 1455 1456 /* 1457 * Take a raw input line, read priority and version, call the 1458 * right message parsing function, then call logmsg(). 1459 */ 1460 void 1461 printline(const char *hname, char *msg, int flags) 1462 { 1463 struct buf_msg *buffer; 1464 int pri; 1465 char *p, *q; 1466 long n; 1467 bool bsdsyslog = true; 1468 1469 DPRINTF((D_CALL|D_BUFFER|D_DATA), 1470 "printline(\"%s\", \"%s\", %d)\n", hname, msg, flags); 1471 1472 /* test for special codes */ 1473 pri = DEFUPRI; 1474 p = msg; 1475 if (*p == '<') { 1476 errno = 0; 1477 n = strtol(p + 1, &q, 10); 1478 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { 1479 p = q + 1; 1480 pri = (int)n; 1481 /* check for syslog-protocol version */ 1482 if (*p == '1' && p[1] == ' ') { 1483 p += 2; /* skip version and space */ 1484 bsdsyslog = false; 1485 } else { 1486 bsdsyslog = true; 1487 } 1488 } 1489 } 1490 if (pri & ~(LOG_FACMASK|LOG_PRIMASK)) 1491 pri = DEFUPRI; 1492 1493 /* 1494 * Don't allow users to log kernel messages. 1495 * NOTE: Since LOG_KERN == 0, this will also match 1496 * messages with no facility specified. 1497 */ 1498 if ((pri & LOG_FACMASK) == LOG_KERN) 1499 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); 1500 1501 if (bsdsyslog) { 1502 buffer = printline_bsdsyslog(hname, p, flags, pri); 1503 } else { 1504 buffer = printline_syslogprotocol(hname, p, flags, pri); 1505 } 1506 logmsg(buffer); 1507 DELREF(buffer); 1508 } 1509 1510 /* 1511 * Take a raw input line from /dev/klog, split and format similar to syslog(). 1512 */ 1513 void 1514 printsys(char *msg) 1515 { 1516 int n, is_printf, pri, flags; 1517 char *p, *q; 1518 struct buf_msg *buffer; 1519 1520 klog_linebufoff = 0; 1521 for (p = msg; *p != '\0'; ) { 1522 bool bsdsyslog = true; 1523 1524 is_printf = 1; 1525 flags = ISKERNEL | ADDDATE | BSDSYSLOG; 1526 if (SyncKernel) 1527 flags |= SYNC_FILE; 1528 if (is_printf) /* kernel printf's come out on console */ 1529 flags |= IGN_CONS; 1530 pri = DEFSPRI; 1531 1532 if (*p == '<') { 1533 errno = 0; 1534 n = (int)strtol(p + 1, &q, 10); 1535 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { 1536 p = q + 1; 1537 is_printf = 0; 1538 pri = n; 1539 if (*p == '1') { /* syslog-protocol version */ 1540 p += 2; /* skip version and space */ 1541 bsdsyslog = false; 1542 } else { 1543 bsdsyslog = true; 1544 } 1545 } 1546 } 1547 for (q = p; *q != '\0' && *q != '\n'; q++) 1548 /* look for end of line; no further checks. 1549 * trust the kernel to send ASCII only */; 1550 if (*q != '\0') 1551 *q++ = '\0'; 1552 else { 1553 memcpy(linebuf, p, klog_linebufoff = q - p); 1554 break; 1555 } 1556 1557 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 1558 pri = DEFSPRI; 1559 1560 /* allow all kinds of input from kernel */ 1561 if (is_printf) 1562 buffer = printline_kernelprintf( 1563 LocalFQDN, p, flags, pri); 1564 else { 1565 if (bsdsyslog) 1566 buffer = printline_bsdsyslog( 1567 LocalFQDN, p, flags, pri); 1568 else 1569 buffer = printline_syslogprotocol( 1570 LocalFQDN, p, flags, pri); 1571 } 1572 1573 /* set fields left open */ 1574 if (!buffer->prog) 1575 buffer->prog = strdup(_PATH_UNIX); 1576 if (!buffer->host) 1577 buffer->host = LocalFQDN; 1578 if (!buffer->recvhost) 1579 buffer->recvhost = LocalFQDN; 1580 1581 logmsg(buffer); 1582 DELREF(buffer); 1583 p = q; 1584 } 1585 } 1586 1587 /* 1588 * Check to see if `name' matches the provided specification, using the 1589 * specified strstr function. 1590 */ 1591 int 1592 matches_spec(const char *name, const char *spec, 1593 char *(*check)(const char *, const char *)) 1594 { 1595 const char *s; 1596 const char *cursor; 1597 char prev, next; 1598 size_t len; 1599 1600 if (name[0] == '\0') 1601 return 0; 1602 1603 if (strchr(name, ',')) /* sanity */ 1604 return 0; 1605 1606 len = strlen(name); 1607 cursor = spec; 1608 while ((s = (*check)(cursor, name)) != NULL) { 1609 prev = s == spec ? ',' : *(s - 1); 1610 cursor = s + len; 1611 next = *cursor; 1612 1613 if (prev == ',' && (next == '\0' || next == ',')) 1614 return 1; 1615 } 1616 1617 return 0; 1618 } 1619 1620 /* 1621 * wrapper with old function signature, 1622 * keeps calling code shorter and hides buffer allocation 1623 */ 1624 void 1625 logmsg_async(int pri, const char *sd, const char *msg, int flags) 1626 { 1627 struct buf_msg *buffer; 1628 size_t msglen; 1629 1630 DPRINTF((D_CALL|D_DATA), "logmsg_async(%d, \"%s\", \"%s\", %d)\n", 1631 pri, sd, msg, flags); 1632 1633 if (msg) { 1634 msglen = strlen(msg); 1635 msglen++; /* adds \0 */ 1636 buffer = buf_msg_new(msglen); 1637 buffer->msglen = strlcpy(buffer->msg, msg, msglen) + 1; 1638 } else { 1639 buffer = buf_msg_new(0); 1640 } 1641 if (sd) buffer->sd = strdup(sd); 1642 buffer->timestamp = strdup(make_timestamp(NULL, !BSDOutputFormat)); 1643 buffer->prog = appname; 1644 buffer->pid = include_pid; 1645 buffer->recvhost = buffer->host = LocalFQDN; 1646 buffer->pri = pri; 1647 buffer->flags = flags; 1648 1649 logmsg(buffer); 1650 DELREF(buffer); 1651 } 1652 1653 /* read timestamp in from_buf, convert into a timestamp in to_buf 1654 * 1655 * returns length of timestamp found in from_buf (= number of bytes consumed) 1656 */ 1657 size_t 1658 check_timestamp(unsigned char *from_buf, char **to_buf, 1659 bool from_iso, bool to_iso) 1660 { 1661 unsigned char *q; 1662 int p; 1663 bool found_ts = false; 1664 1665 DPRINTF((D_CALL|D_DATA), "check_timestamp(%p = \"%s\", from_iso=%d, " 1666 "to_iso=%d)\n", from_buf, from_buf, from_iso, to_iso); 1667 1668 if (!from_buf) return 0; 1669 /* 1670 * Check to see if msg looks non-standard. 1671 * looks at every char because we do not have a msg length yet 1672 */ 1673 /* detailed checking adapted from Albert Mietus' sl_timestamp.c */ 1674 if (from_iso) { 1675 if (from_buf[4] == '-' && from_buf[7] == '-' 1676 && from_buf[10] == 'T' && from_buf[13] == ':' 1677 && from_buf[16] == ':' 1678 && isdigit(from_buf[0]) && isdigit(from_buf[1]) 1679 && isdigit(from_buf[2]) && isdigit(from_buf[3]) /* YYYY */ 1680 && isdigit(from_buf[5]) && isdigit(from_buf[6]) 1681 && isdigit(from_buf[8]) && isdigit(from_buf[9]) /* mm dd */ 1682 && isdigit(from_buf[11]) && isdigit(from_buf[12]) /* HH */ 1683 && isdigit(from_buf[14]) && isdigit(from_buf[15]) /* MM */ 1684 && isdigit(from_buf[17]) && isdigit(from_buf[18]) /* SS */ 1685 ) { 1686 /* time-secfrac */ 1687 if (from_buf[19] == '.') 1688 for (p=20; isdigit(from_buf[p]); p++) /* NOP*/; 1689 else 1690 p = 19; 1691 /* time-offset */ 1692 if (from_buf[p] == 'Z' 1693 || ((from_buf[p] == '+' || from_buf[p] == '-') 1694 && from_buf[p+3] == ':' 1695 && isdigit(from_buf[p+1]) && isdigit(from_buf[p+2]) 1696 && isdigit(from_buf[p+4]) && isdigit(from_buf[p+5]) 1697 )) 1698 found_ts = true; 1699 } 1700 } else { 1701 if (from_buf[3] == ' ' && from_buf[6] == ' ' 1702 && from_buf[9] == ':' && from_buf[12] == ':' 1703 && (from_buf[4] == ' ' || isdigit(from_buf[4])) 1704 && isdigit(from_buf[5]) /* dd */ 1705 && isdigit(from_buf[7]) && isdigit(from_buf[8]) /* HH */ 1706 && isdigit(from_buf[10]) && isdigit(from_buf[11]) /* MM */ 1707 && isdigit(from_buf[13]) && isdigit(from_buf[14]) /* SS */ 1708 && isupper(from_buf[0]) && islower(from_buf[1]) /* month */ 1709 && islower(from_buf[2])) 1710 found_ts = true; 1711 } 1712 if (!found_ts) { 1713 if (from_buf[0] == '-' && from_buf[1] == ' ') { 1714 /* NILVALUE */ 1715 if (to_iso) { 1716 /* with ISO = syslog-protocol output leave 1717 * it as is, because it is better to have 1718 * no timestamp than a wrong one. 1719 */ 1720 *to_buf = strdup("-"); 1721 } else { 1722 /* with BSD Syslog the field is reqired 1723 * so replace it with current time 1724 */ 1725 *to_buf = strdup(make_timestamp(NULL, false)); 1726 } 1727 return 2; 1728 } 1729 return 0; 1730 } 1731 1732 if (!from_iso && !to_iso) { 1733 /* copy BSD timestamp */ 1734 DPRINTF(D_CALL, "check_timestamp(): copy BSD timestamp\n"); 1735 *to_buf = strndup((char *)from_buf, BSD_TIMESTAMPLEN); 1736 return BSD_TIMESTAMPLEN; 1737 } else if (from_iso && to_iso) { 1738 /* copy ISO timestamp */ 1739 DPRINTF(D_CALL, "check_timestamp(): copy ISO timestamp\n"); 1740 if (!(q = (unsigned char *) strchr((char *)from_buf, ' '))) 1741 q = from_buf + strlen((char *)from_buf); 1742 *to_buf = strndup((char *)from_buf, q - from_buf); 1743 return q - from_buf; 1744 } else if (from_iso && !to_iso) { 1745 /* convert ISO->BSD */ 1746 struct tm parsed; 1747 time_t timeval; 1748 char tsbuf[MAX_TIMESTAMPLEN]; 1749 int i = 0; 1750 1751 DPRINTF(D_CALL, "check_timestamp(): convert ISO->BSD\n"); 1752 for(i = 0; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1753 && from_buf[i] != '.' && from_buf[i] != ' '; i++) 1754 tsbuf[i] = from_buf[i]; /* copy date & time */ 1755 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1756 && from_buf[i] != '+' && from_buf[i] != '-' 1757 && from_buf[i] != 'Z' && from_buf[i] != ' '; i++) 1758 ; /* skip fraction digits */ 1759 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1760 && from_buf[i] != ':' && from_buf[i] != ' ' ; i++) 1761 tsbuf[i] = from_buf[i]; /* copy TZ */ 1762 if (from_buf[i] == ':') i++; /* skip colon */ 1763 for(; i < MAX_TIMESTAMPLEN && from_buf[i] != '\0' 1764 && from_buf[i] != ' ' ; i++) 1765 tsbuf[i] = from_buf[i]; /* copy TZ */ 1766 1767 (void)memset(&parsed, 0, sizeof(parsed)); 1768 parsed.tm_isdst = -1; 1769 (void)strptime(tsbuf, "%FT%T%z", &parsed); 1770 timeval = mktime(&parsed); 1771 1772 *to_buf = strndup(make_timestamp(&timeval, false), 1773 BSD_TIMESTAMPLEN); 1774 return i; 1775 } else if (!from_iso && to_iso) { 1776 /* convert BSD->ISO */ 1777 struct tm parsed; 1778 struct tm *current; 1779 time_t timeval; 1780 char *rc; 1781 1782 (void)memset(&parsed, 0, sizeof(parsed)); 1783 parsed.tm_isdst = -1; 1784 DPRINTF(D_CALL, "check_timestamp(): convert BSD->ISO\n"); 1785 rc = strptime((char *)from_buf, "%b %d %T", &parsed); 1786 current = gmtime(&now); 1787 1788 /* use current year and timezone */ 1789 parsed.tm_isdst = current->tm_isdst; 1790 parsed.tm_gmtoff = current->tm_gmtoff; 1791 parsed.tm_year = current->tm_year; 1792 if (current->tm_mon == 0 && parsed.tm_mon == 11) 1793 parsed.tm_year--; 1794 1795 timeval = mktime(&parsed); 1796 rc = make_timestamp(&timeval, true); 1797 *to_buf = strndup(rc, MAX_TIMESTAMPLEN-1); 1798 1799 return BSD_TIMESTAMPLEN; 1800 } else { 1801 DPRINTF(D_MISC, 1802 "Executing unreachable code in check_timestamp()\n"); 1803 return 0; 1804 } 1805 } 1806 1807 /* 1808 * Log a message to the appropriate log files, users, etc. based on 1809 * the priority. 1810 */ 1811 void 1812 logmsg(struct buf_msg *buffer) 1813 { 1814 struct filed *f; 1815 int fac, omask, prilev; 1816 1817 DPRINTF((D_CALL|D_BUFFER), "logmsg: buffer@%p, pri 0%o/%d, flags 0x%x," 1818 " timestamp \"%s\", from \"%s\", sd \"%s\", msg \"%s\"\n", 1819 buffer, buffer->pri, buffer->pri, buffer->flags, 1820 buffer->timestamp, buffer->recvhost, buffer->sd, buffer->msg); 1821 1822 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM)); 1823 1824 /* sanity check */ 1825 assert(buffer->refcount == 1); 1826 assert(buffer->msglen <= buffer->msgsize); 1827 assert(buffer->msgorig <= buffer->msg); 1828 assert((buffer->msg && buffer->msglen == strlen(buffer->msg)+1) 1829 || (!buffer->msg && !buffer->msglen)); 1830 if (!buffer->msg && !buffer->sd && !buffer->msgid) 1831 DPRINTF(D_BUFFER, "Empty message?\n"); 1832 1833 /* extract facility and priority level */ 1834 if (buffer->flags & MARK) 1835 fac = LOG_NFACILITIES; 1836 else 1837 fac = LOG_FAC(buffer->pri); 1838 prilev = LOG_PRI(buffer->pri); 1839 1840 /* log the message to the particular outputs */ 1841 if (!Initialized) { 1842 f = &consfile; 1843 f->f_file = open(ctty, O_WRONLY | O_NDELAY, 0); 1844 1845 if (f->f_file >= 0) { 1846 DELREF(f->f_prevmsg); 1847 f->f_prevmsg = NEWREF(buffer); 1848 fprintlog(f, NEWREF(buffer), NULL); 1849 DELREF(buffer); 1850 (void)close(f->f_file); 1851 } 1852 (void)sigsetmask(omask); 1853 return; 1854 } 1855 1856 for (f = Files; f; f = f->f_next) { 1857 char *h; /* host to use for comparing */ 1858 1859 /* skip messages that are incorrect priority */ 1860 if (!MATCH_PRI(f, fac, prilev) 1861 || f->f_pmask[fac] == INTERNAL_NOPRI) 1862 continue; 1863 1864 /* skip messages with the incorrect host name */ 1865 /* compare with host (which is supposedly more correct), */ 1866 /* but fallback to recvhost if host is NULL */ 1867 h = (buffer->host != NULL) ? buffer->host : buffer->recvhost; 1868 if (f->f_host != NULL && h != NULL) { 1869 char shost[MAXHOSTNAMELEN + 1]; 1870 1871 if (BSDOutputFormat) { 1872 (void)strlcpy(shost, h, sizeof(shost)); 1873 trim_anydomain(shost); 1874 h = shost; 1875 } 1876 switch (f->f_host[0]) { 1877 case '+': 1878 if (! matches_spec(h, f->f_host + 1, 1879 strcasestr)) 1880 continue; 1881 break; 1882 case '-': 1883 if (matches_spec(h, f->f_host + 1, 1884 strcasestr)) 1885 continue; 1886 break; 1887 } 1888 } 1889 1890 /* skip messages with the incorrect program name */ 1891 if (f->f_program != NULL && buffer->prog != NULL) { 1892 switch (f->f_program[0]) { 1893 case '+': 1894 if (!matches_spec(buffer->prog, 1895 f->f_program + 1, strstr)) 1896 continue; 1897 break; 1898 case '-': 1899 if (matches_spec(buffer->prog, 1900 f->f_program + 1, strstr)) 1901 continue; 1902 break; 1903 default: 1904 if (!matches_spec(buffer->prog, 1905 f->f_program, strstr)) 1906 continue; 1907 break; 1908 } 1909 } 1910 1911 if (f->f_type == F_CONSOLE && (buffer->flags & IGN_CONS)) 1912 continue; 1913 1914 /* don't output marks to recently written files */ 1915 if ((buffer->flags & MARK) 1916 && (now - f->f_time) < MarkInterval / 2) 1917 continue; 1918 1919 /* 1920 * suppress duplicate lines to this file unless NoRepeat 1921 */ 1922 #define MSG_FIELD_EQ(x) ((!buffer->x && !f->f_prevmsg->x) || \ 1923 (buffer->x && f->f_prevmsg->x && !strcmp(buffer->x, f->f_prevmsg->x))) 1924 1925 if ((buffer->flags & MARK) == 0 && 1926 f->f_prevmsg && 1927 buffer->msglen == f->f_prevmsg->msglen && 1928 !NoRepeat && 1929 MSG_FIELD_EQ(host) && 1930 MSG_FIELD_EQ(sd) && 1931 MSG_FIELD_EQ(msg) 1932 ) { 1933 f->f_prevcount++; 1934 DPRINTF(D_DATA, "Msg repeated %d times, %ld sec of %d\n", 1935 f->f_prevcount, (long)(now - f->f_time), 1936 repeatinterval[f->f_repeatcount]); 1937 /* 1938 * If domark would have logged this by now, 1939 * flush it now (so we don't hold isolated messages), 1940 * but back off so we'll flush less often 1941 * in the future. 1942 */ 1943 if (now > REPEATTIME(f)) { 1944 fprintlog(f, NEWREF(buffer), NULL); 1945 DELREF(buffer); 1946 BACKOFF(f); 1947 } 1948 } else { 1949 /* new line, save it */ 1950 if (f->f_prevcount) 1951 fprintlog(f, NULL, NULL); 1952 f->f_repeatcount = 0; 1953 DELREF(f->f_prevmsg); 1954 f->f_prevmsg = NEWREF(buffer); 1955 fprintlog(f, NEWREF(buffer), NULL); 1956 DELREF(buffer); 1957 } 1958 } 1959 (void)sigsetmask(omask); 1960 } 1961 1962 /* 1963 * format one buffer into output format given by flag BSDOutputFormat 1964 * line is allocated and has to be free()d by caller 1965 * size_t pointers are optional, if not NULL then they will return 1966 * different lenghts used for formatting and output 1967 */ 1968 #define OUT(x) ((x)?(x):"-") 1969 bool 1970 format_buffer(struct buf_msg *buffer, char **line, size_t *ptr_linelen, 1971 size_t *ptr_msglen, size_t *ptr_tlsprefixlen, size_t *ptr_prilen) 1972 { 1973 #define FPBUFSIZE 30 1974 static char ascii_empty[] = ""; 1975 char fp_buf[FPBUFSIZE] = "\0"; 1976 char *hostname, *shorthostname = NULL; 1977 char *ascii_sd = ascii_empty; 1978 char *ascii_msg = ascii_empty; 1979 size_t linelen, msglen, tlsprefixlen, prilen, j; 1980 1981 DPRINTF(D_CALL, "format_buffer(%p)\n", buffer); 1982 if (!buffer) return false; 1983 1984 /* All buffer fields are set with strdup(). To avoid problems 1985 * on memory exhaustion we allow them to be empty and replace 1986 * the essential fields with already allocated generic values. 1987 */ 1988 if (!buffer->timestamp) 1989 buffer->timestamp = timestamp; 1990 if (!buffer->host && !buffer->recvhost) 1991 buffer->host = LocalFQDN; 1992 1993 if (LogFacPri) { 1994 const char *f_s = NULL, *p_s = NULL; 1995 int fac = buffer->pri & LOG_FACMASK; 1996 int pri = LOG_PRI(buffer->pri); 1997 char f_n[5], p_n[5]; 1998 1999 if (LogFacPri > 1) { 2000 CODE *c; 2001 2002 for (c = facilitynames; c->c_name != NULL; c++) { 2003 if (c->c_val == fac) { 2004 f_s = c->c_name; 2005 break; 2006 } 2007 } 2008 for (c = prioritynames; c->c_name != NULL; c++) { 2009 if (c->c_val == pri) { 2010 p_s = c->c_name; 2011 break; 2012 } 2013 } 2014 } 2015 if (f_s == NULL) { 2016 snprintf(f_n, sizeof(f_n), "%d", LOG_FAC(fac)); 2017 f_s = f_n; 2018 } 2019 if (p_s == NULL) { 2020 snprintf(p_n, sizeof(p_n), "%d", pri); 2021 p_s = p_n; 2022 } 2023 snprintf(fp_buf, sizeof(fp_buf), "<%s.%s>", f_s, p_s); 2024 } 2025 2026 /* hostname or FQDN */ 2027 hostname = (buffer->host ? buffer->host : buffer->recvhost); 2028 if (BSDOutputFormat 2029 && (shorthostname = strdup(hostname))) { 2030 /* if the previous BSD output format with "host [recvhost]:" 2031 * gets implemented, this is the right place to distinguish 2032 * between buffer->host and buffer->recvhost 2033 */ 2034 trim_anydomain(shorthostname); 2035 hostname = shorthostname; 2036 } 2037 2038 /* new message formatting: 2039 * instead of using iov always assemble one complete TLS-ready line 2040 * with length and priority (depending on BSDOutputFormat either in 2041 * BSD Syslog or syslog-protocol format) 2042 * 2043 * additionally save the length of the prefixes, 2044 * so UDP destinations can skip the length prefix and 2045 * file/pipe/wall destinations can omit length and priority 2046 */ 2047 /* first determine required space */ 2048 if (BSDOutputFormat) { 2049 /* only output ASCII chars */ 2050 if (buffer->sd) 2051 ascii_sd = copy_utf8_ascii(buffer->sd, 2052 strlen(buffer->sd)); 2053 if (buffer->msg) { 2054 if (IS_BOM(buffer->msg)) 2055 ascii_msg = copy_utf8_ascii(buffer->msg, 2056 buffer->msglen - 1); 2057 else /* assume already converted at input */ 2058 ascii_msg = buffer->msg; 2059 } 2060 msglen = snprintf(NULL, 0, "<%d>%s%.15s %s %s%s%s%s: %s%s%s", 2061 buffer->pri, fp_buf, buffer->timestamp, 2062 hostname, OUT(buffer->prog), 2063 buffer->pid ? "[" : "", 2064 buffer->pid ? buffer->pid : "", 2065 buffer->pid ? "]" : "", ascii_sd, 2066 (buffer->sd && buffer->msg ? " ": ""), ascii_msg); 2067 } else 2068 msglen = snprintf(NULL, 0, "<%d>1 %s%s %s %s %s %s %s%s%s", 2069 buffer->pri, fp_buf, buffer->timestamp, 2070 hostname, OUT(buffer->prog), OUT(buffer->pid), 2071 OUT(buffer->msgid), OUT(buffer->sd), 2072 (buffer->msg ? " ": ""), 2073 (buffer->msg ? buffer->msg: "")); 2074 /* add space for length prefix */ 2075 tlsprefixlen = 0; 2076 for (j = msglen; j; j /= 10) 2077 tlsprefixlen++; 2078 /* one more for the space */ 2079 tlsprefixlen++; 2080 2081 prilen = snprintf(NULL, 0, "<%d>", buffer->pri); 2082 if (!BSDOutputFormat) 2083 prilen += 2; /* version char and space */ 2084 MALLOC(*line, msglen + tlsprefixlen + 1); 2085 if (BSDOutputFormat) 2086 linelen = snprintf(*line, 2087 msglen + tlsprefixlen + 1, 2088 "%zu <%d>%s%.15s %s %s%s%s%s: %s%s%s", 2089 msglen, buffer->pri, fp_buf, buffer->timestamp, 2090 hostname, OUT(buffer->prog), 2091 (buffer->pid ? "[" : ""), 2092 (buffer->pid ? buffer->pid : ""), 2093 (buffer->pid ? "]" : ""), ascii_sd, 2094 (buffer->sd && buffer->msg ? " ": ""), ascii_msg); 2095 else 2096 linelen = snprintf(*line, 2097 msglen + tlsprefixlen + 1, 2098 "%zu <%d>1 %s%s %s %s %s %s %s%s%s", 2099 msglen, buffer->pri, fp_buf, buffer->timestamp, 2100 hostname, OUT(buffer->prog), OUT(buffer->pid), 2101 OUT(buffer->msgid), OUT(buffer->sd), 2102 (buffer->msg ? " ": ""), 2103 (buffer->msg ? buffer->msg: "")); 2104 DPRINTF(D_DATA, "formatted %zu octets to: '%.*s' (linelen %zu, " 2105 "msglen %zu, tlsprefixlen %zu, prilen %zu)\n", linelen, 2106 (int)linelen, *line, linelen, msglen, tlsprefixlen, prilen); 2107 2108 FREEPTR(shorthostname); 2109 if (ascii_sd != ascii_empty) 2110 FREEPTR(ascii_sd); 2111 if (ascii_msg != ascii_empty && ascii_msg != buffer->msg) 2112 FREEPTR(ascii_msg); 2113 2114 if (ptr_linelen) *ptr_linelen = linelen; 2115 if (ptr_msglen) *ptr_msglen = msglen; 2116 if (ptr_tlsprefixlen) *ptr_tlsprefixlen = tlsprefixlen; 2117 if (ptr_prilen) *ptr_prilen = prilen; 2118 return true; 2119 } 2120 2121 /* 2122 * if qentry == NULL: new message, if temporarily undeliverable it will be enqueued 2123 * if qentry != NULL: a temporarily undeliverable message will not be enqueued, 2124 * but after delivery be removed from the queue 2125 */ 2126 void 2127 fprintlog(struct filed *f, struct buf_msg *passedbuffer, struct buf_queue *qentry) 2128 { 2129 static char crnl[] = "\r\n"; 2130 struct buf_msg *buffer = passedbuffer; 2131 struct iovec iov[4]; 2132 struct iovec *v = iov; 2133 bool error = false; 2134 int e = 0, len = 0; 2135 size_t msglen, linelen, tlsprefixlen, prilen; 2136 char *p, *line = NULL, *lineptr = NULL; 2137 #ifndef DISABLE_SIGN 2138 bool newhash = false; 2139 #endif 2140 #define REPBUFSIZE 80 2141 char greetings[200]; 2142 #define ADDEV() do { v++; assert((size_t)(v - iov) < A_CNT(iov)); } while(/*CONSTCOND*/0) 2143 2144 DPRINTF(D_CALL, "fprintlog(%p, %p, %p)\n", f, buffer, qentry); 2145 2146 f->f_time = now; 2147 2148 /* increase refcount here and lower again at return. 2149 * this enables the buffer in the else branch to be freed 2150 * --> every branch needs one NEWREF() or buf_msg_new()! */ 2151 if (buffer) { 2152 (void)NEWREF(buffer); 2153 } else { 2154 if (f->f_prevcount > 1) { 2155 /* possible syslog-sign incompatibility: 2156 * assume destinations f1 and f2 share one SG and 2157 * get the same message sequence. 2158 * 2159 * now both f1 and f2 generate "repeated" messages 2160 * "repeated" messages are different due to different 2161 * timestamps 2162 * the SG will get hashes for the two "repeated" messages 2163 * 2164 * now both f1 and f2 are just fine, but a verification 2165 * will report that each 'lost' a message, i.e. the 2166 * other's "repeated" message 2167 * 2168 * conditions for 'safe configurations': 2169 * - use NoRepeat option, 2170 * - use SG 3, or 2171 * - have exactly one destination for every PRI 2172 */ 2173 buffer = buf_msg_new(REPBUFSIZE); 2174 buffer->msglen = snprintf(buffer->msg, REPBUFSIZE, 2175 "last message repeated %d times", f->f_prevcount); 2176 buffer->timestamp = 2177 strdup(make_timestamp(NULL, !BSDOutputFormat)); 2178 buffer->pri = f->f_prevmsg->pri; 2179 buffer->host = LocalFQDN; 2180 buffer->prog = appname; 2181 buffer->pid = include_pid; 2182 2183 } else { 2184 buffer = NEWREF(f->f_prevmsg); 2185 } 2186 } 2187 2188 /* no syslog-sign messages to tty/console/... */ 2189 if ((buffer->flags & SIGN_MSG) 2190 && ((f->f_type == F_UNUSED) 2191 || (f->f_type == F_TTY) 2192 || (f->f_type == F_CONSOLE) 2193 || (f->f_type == F_USERS) 2194 || (f->f_type == F_WALL) 2195 || (f->f_type == F_FIFO))) { 2196 DELREF(buffer); 2197 return; 2198 } 2199 2200 /* buffering works only for few types */ 2201 if (qentry 2202 && (f->f_type != F_TLS) 2203 && (f->f_type != F_PIPE) 2204 && (f->f_type != F_FILE) 2205 && (f->f_type != F_FIFO)) { 2206 errno = 0; 2207 logerror("Warning: unexpected message type %d in buffer", 2208 f->f_type); 2209 DELREF(buffer); 2210 return; 2211 } 2212 2213 if (!format_buffer(buffer, &line, 2214 &linelen, &msglen, &tlsprefixlen, &prilen)) { 2215 DPRINTF(D_CALL, "format_buffer() failed, skip message\n"); 2216 DELREF(buffer); 2217 return; 2218 } 2219 /* assert maximum message length */ 2220 if (TypeInfo[f->f_type].max_msg_length != -1 2221 && (size_t)TypeInfo[f->f_type].max_msg_length 2222 < linelen - tlsprefixlen - prilen) { 2223 linelen = TypeInfo[f->f_type].max_msg_length 2224 + tlsprefixlen + prilen; 2225 DPRINTF(D_DATA, "truncating oversized message to %zu octets\n", 2226 linelen); 2227 } 2228 2229 #ifndef DISABLE_SIGN 2230 /* keep state between appending the hash (before buffer is sent) 2231 * and possibly sending a SB (after buffer is sent): */ 2232 /* get hash */ 2233 if (!(buffer->flags & SIGN_MSG) && !qentry) { 2234 char *hash = NULL; 2235 struct signature_group_t *sg; 2236 2237 if ((sg = sign_get_sg(buffer->pri, f)) != NULL) { 2238 if (sign_msg_hash(line + tlsprefixlen, &hash)) 2239 newhash = sign_append_hash(hash, sg); 2240 else 2241 DPRINTF(D_SIGN, 2242 "Unable to hash line \"%s\"\n", line); 2243 } 2244 } 2245 #endif /* !DISABLE_SIGN */ 2246 2247 /* set start and length of buffer and/or fill iovec */ 2248 switch (f->f_type) { 2249 case F_UNUSED: 2250 /* nothing */ 2251 break; 2252 case F_TLS: 2253 /* nothing, as TLS uses whole buffer to send */ 2254 lineptr = line; 2255 len = linelen; 2256 break; 2257 case F_FORW: 2258 lineptr = line + tlsprefixlen; 2259 len = linelen - tlsprefixlen; 2260 break; 2261 case F_PIPE: 2262 case F_FIFO: 2263 case F_FILE: /* fallthrough */ 2264 if (f->f_flags & FFLAG_FULL) { 2265 v->iov_base = line + tlsprefixlen; 2266 v->iov_len = linelen - tlsprefixlen; 2267 } else { 2268 v->iov_base = line + tlsprefixlen + prilen; 2269 v->iov_len = linelen - tlsprefixlen - prilen; 2270 } 2271 ADDEV(); 2272 v->iov_base = &crnl[1]; 2273 v->iov_len = 1; 2274 ADDEV(); 2275 break; 2276 case F_CONSOLE: 2277 case F_TTY: 2278 /* filter non-ASCII */ 2279 p = line; 2280 while (*p) { 2281 *p = FORCE2ASCII(*p); 2282 p++; 2283 } 2284 v->iov_base = line + tlsprefixlen + prilen; 2285 v->iov_len = linelen - tlsprefixlen - prilen; 2286 ADDEV(); 2287 v->iov_base = crnl; 2288 v->iov_len = 2; 2289 ADDEV(); 2290 break; 2291 case F_WALL: 2292 v->iov_base = greetings; 2293 v->iov_len = snprintf(greetings, sizeof(greetings), 2294 "\r\n\7Message from syslogd@%s at %s ...\r\n", 2295 (buffer->host ? buffer->host : buffer->recvhost), 2296 buffer->timestamp); 2297 ADDEV(); 2298 case F_USERS: /* fallthrough */ 2299 /* filter non-ASCII */ 2300 p = line; 2301 while (*p) { 2302 *p = FORCE2ASCII(*p); 2303 p++; 2304 } 2305 v->iov_base = line + tlsprefixlen + prilen; 2306 v->iov_len = linelen - tlsprefixlen - prilen; 2307 ADDEV(); 2308 v->iov_base = &crnl[1]; 2309 v->iov_len = 1; 2310 ADDEV(); 2311 break; 2312 } 2313 2314 /* send */ 2315 switch (f->f_type) { 2316 case F_UNUSED: 2317 DPRINTF(D_MISC, "Logging to %s\n", TypeInfo[f->f_type].name); 2318 break; 2319 2320 case F_FORW: 2321 DPRINTF(D_MISC, "Logging to %s %s\n", 2322 TypeInfo[f->f_type].name, f->f_un.f_forw.f_hname); 2323 udp_send(f, lineptr, len); 2324 break; 2325 2326 #ifndef DISABLE_TLS 2327 case F_TLS: 2328 DPRINTF(D_MISC, "Logging to %s %s\n", 2329 TypeInfo[f->f_type].name, 2330 f->f_un.f_tls.tls_conn->hostname); 2331 /* make sure every message gets queued once 2332 * it will be removed when sendmsg is sent and free()d */ 2333 if (!qentry) 2334 qentry = message_queue_add(f, NEWREF(buffer)); 2335 (void)tls_send(f, lineptr, len, qentry); 2336 break; 2337 #endif /* !DISABLE_TLS */ 2338 2339 case F_PIPE: 2340 DPRINTF(D_MISC, "Logging to %s %s\n", 2341 TypeInfo[f->f_type].name, f->f_un.f_pipe.f_pname); 2342 if (f->f_un.f_pipe.f_pid == 0) { 2343 /* (re-)open */ 2344 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname, 2345 &f->f_un.f_pipe.f_pid)) < 0) { 2346 f->f_type = F_UNUSED; 2347 logerror("%s", f->f_un.f_pipe.f_pname); 2348 message_queue_freeall(f); 2349 break; 2350 } else if (!qentry) /* prevent recursion */ 2351 SEND_QUEUE(f); 2352 } 2353 if (writev(f->f_file, iov, v - iov) < 0) { 2354 e = errno; 2355 if (f->f_un.f_pipe.f_pid > 0) { 2356 (void) close(f->f_file); 2357 deadq_enter(f->f_un.f_pipe.f_pid, 2358 f->f_un.f_pipe.f_pname); 2359 } 2360 f->f_un.f_pipe.f_pid = 0; 2361 /* 2362 * If the error was EPIPE, then what is likely 2363 * has happened is we have a command that is 2364 * designed to take a single message line and 2365 * then exit, but we tried to feed it another 2366 * one before we reaped the child and thus 2367 * reset our state. 2368 * 2369 * Well, now we've reset our state, so try opening 2370 * the pipe and sending the message again if EPIPE 2371 * was the error. 2372 */ 2373 if (e == EPIPE) { 2374 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname, 2375 &f->f_un.f_pipe.f_pid)) < 0) { 2376 f->f_type = F_UNUSED; 2377 logerror("%s", f->f_un.f_pipe.f_pname); 2378 message_queue_freeall(f); 2379 break; 2380 } 2381 if (writev(f->f_file, iov, v - iov) < 0) { 2382 e = errno; 2383 if (f->f_un.f_pipe.f_pid > 0) { 2384 (void) close(f->f_file); 2385 deadq_enter(f->f_un.f_pipe.f_pid, 2386 f->f_un.f_pipe.f_pname); 2387 } 2388 f->f_un.f_pipe.f_pid = 0; 2389 error = true; /* enqueue on return */ 2390 } else 2391 e = 0; 2392 } 2393 if (e != 0 && !error) { 2394 errno = e; 2395 logerror("%s", f->f_un.f_pipe.f_pname); 2396 } 2397 } 2398 if (e == 0 && qentry) { /* sent buffered msg */ 2399 message_queue_remove(f, qentry); 2400 } 2401 break; 2402 2403 case F_CONSOLE: 2404 if (buffer->flags & IGN_CONS) { 2405 DPRINTF(D_MISC, "Logging to %s (ignored)\n", 2406 TypeInfo[f->f_type].name); 2407 break; 2408 } 2409 /* FALLTHROUGH */ 2410 2411 case F_TTY: 2412 case F_FILE: 2413 DPRINTF(D_MISC, "Logging to %s %s\n", 2414 TypeInfo[f->f_type].name, f->f_un.f_fname); 2415 again: 2416 if ((f->f_type == F_FILE ? writev(f->f_file, iov, v - iov) : 2417 writev1(f->f_file, iov, v - iov)) < 0) { 2418 e = errno; 2419 if (f->f_type == F_FILE && e == ENOSPC) { 2420 int lasterror = f->f_lasterror; 2421 f->f_lasterror = e; 2422 if (lasterror != e) 2423 logerror("%s", f->f_un.f_fname); 2424 error = true; /* enqueue on return */ 2425 } 2426 (void)close(f->f_file); 2427 /* 2428 * Check for errors on TTY's due to loss of tty 2429 */ 2430 if ((e == EIO || e == EBADF) && f->f_type != F_FILE) { 2431 f->f_file = open(f->f_un.f_fname, 2432 O_WRONLY|O_APPEND|O_NONBLOCK, 0); 2433 if (f->f_file < 0) { 2434 f->f_type = F_UNUSED; 2435 logerror("%s", f->f_un.f_fname); 2436 message_queue_freeall(f); 2437 } else 2438 goto again; 2439 } else { 2440 f->f_type = F_UNUSED; 2441 errno = e; 2442 f->f_lasterror = e; 2443 logerror("%s", f->f_un.f_fname); 2444 message_queue_freeall(f); 2445 } 2446 } else { 2447 f->f_lasterror = 0; 2448 if ((buffer->flags & SYNC_FILE) 2449 && (f->f_flags & FFLAG_SYNC)) 2450 (void)fsync(f->f_file); 2451 /* Problem with files: We cannot check beforehand if 2452 * they would be writeable and call send_queue() first. 2453 * So we call send_queue() after a successful write, 2454 * which means the first message will be out of order. 2455 */ 2456 if (!qentry) /* prevent recursion */ 2457 SEND_QUEUE(f); 2458 else if (qentry) /* sent buffered msg */ 2459 message_queue_remove(f, qentry); 2460 } 2461 break; 2462 2463 case F_FIFO: 2464 DPRINTF(D_MISC, "Logging to %s %s\n", 2465 TypeInfo[f->f_type].name, f->f_un.f_fname); 2466 if (f->f_file < 0) { 2467 f->f_file = 2468 open(f->f_un.f_fname, O_WRONLY|O_NONBLOCK, 0); 2469 e = errno; 2470 if (f->f_file < 0 && e == ENXIO) { 2471 /* Drop messages with no reader */ 2472 if (qentry) 2473 message_queue_remove(f, qentry); 2474 break; 2475 } 2476 } 2477 2478 if (f->f_file >= 0 && writev(f->f_file, iov, v - iov) < 0) { 2479 e = errno; 2480 2481 /* Enqueue if the fifo buffer is full */ 2482 if (e == EAGAIN) { 2483 if (f->f_lasterror != e) 2484 logerror("%s", f->f_un.f_fname); 2485 f->f_lasterror = e; 2486 error = true; /* enqueue on return */ 2487 break; 2488 } 2489 2490 close(f->f_file); 2491 f->f_file = -1; 2492 2493 /* Drop messages with no reader */ 2494 if (e == EPIPE) { 2495 if (qentry) 2496 message_queue_remove(f, qentry); 2497 break; 2498 } 2499 } 2500 2501 if (f->f_file < 0) { 2502 f->f_type = F_UNUSED; 2503 errno = e; 2504 f->f_lasterror = e; 2505 logerror("%s", f->f_un.f_fname); 2506 message_queue_freeall(f); 2507 break; 2508 } 2509 2510 f->f_lasterror = 0; 2511 if (!qentry) /* prevent recursion (see comment for F_FILE) */ 2512 SEND_QUEUE(f); 2513 if (qentry) /* sent buffered msg */ 2514 message_queue_remove(f, qentry); 2515 break; 2516 2517 case F_USERS: 2518 case F_WALL: 2519 DPRINTF(D_MISC, "Logging to %s\n", TypeInfo[f->f_type].name); 2520 wallmsg(f, iov, v - iov); 2521 break; 2522 } 2523 f->f_prevcount = 0; 2524 2525 if (error && !qentry) 2526 message_queue_add(f, NEWREF(buffer)); 2527 #ifndef DISABLE_SIGN 2528 if (newhash) { 2529 struct signature_group_t *sg; 2530 sg = sign_get_sg(buffer->pri, f); 2531 (void)sign_send_signature_block(sg, false); 2532 } 2533 #endif /* !DISABLE_SIGN */ 2534 /* this belongs to the ad-hoc buffer at the first if(buffer) */ 2535 DELREF(buffer); 2536 /* TLS frees on its own */ 2537 if (f->f_type != F_TLS) 2538 FREEPTR(line); 2539 } 2540 2541 /* send one line by UDP */ 2542 void 2543 udp_send(struct filed *f, char *line, size_t len) 2544 { 2545 int lsent, fail, retry, j; 2546 struct addrinfo *r; 2547 2548 DPRINTF((D_NET|D_CALL), "udp_send(f=%p, line=\"%s\", " 2549 "len=%zu) to dest.\n", f, line, len); 2550 2551 if (!finet) 2552 return; 2553 2554 lsent = -1; 2555 fail = 0; 2556 assert(f->f_type == F_FORW); 2557 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) { 2558 retry = 0; 2559 for (j = 0; j < finet->fd; j++) { 2560 if (finet[j+1].af != r->ai_family) 2561 continue; 2562 sendagain: 2563 lsent = sendto(finet[j+1].fd, line, len, 0, 2564 r->ai_addr, r->ai_addrlen); 2565 if (lsent == -1) { 2566 switch (errno) { 2567 case ENOBUFS: 2568 /* wait/retry/drop */ 2569 if (++retry < 5) { 2570 usleep(1000); 2571 goto sendagain; 2572 } 2573 break; 2574 case EHOSTDOWN: 2575 case EHOSTUNREACH: 2576 case ENETDOWN: 2577 /* drop */ 2578 break; 2579 default: 2580 /* busted */ 2581 fail++; 2582 break; 2583 } 2584 } else if ((size_t)lsent == len) 2585 break; 2586 } 2587 if ((size_t)lsent != len && fail) { 2588 f->f_type = F_UNUSED; 2589 logerror("sendto() failed"); 2590 } 2591 } 2592 } 2593 2594 /* 2595 * WALLMSG -- Write a message to the world at large 2596 * 2597 * Write the specified message to either the entire 2598 * world, or a list of approved users. 2599 */ 2600 void 2601 wallmsg(struct filed *f, struct iovec *iov, size_t iovcnt) 2602 { 2603 #ifdef __NetBSD_Version__ 2604 static int reenter; /* avoid calling ourselves */ 2605 int i; 2606 char *p; 2607 struct utmpentry *ep; 2608 2609 if (reenter++) 2610 return; 2611 2612 (void)getutentries(NULL, &ep); 2613 /* NOSTRICT */ 2614 for (; ep; ep = ep->next) { 2615 if (f->f_type == F_WALL) { 2616 if ((p = ttymsg(iov, iovcnt, ep->line, TTYMSGTIME)) 2617 != NULL) { 2618 errno = 0; /* already in msg */ 2619 logerror("%s", p); 2620 } 2621 continue; 2622 } 2623 /* should we send the message to this user? */ 2624 for (i = 0; i < MAXUNAMES; i++) { 2625 if (!f->f_un.f_uname[i][0]) 2626 break; 2627 if (strcmp(f->f_un.f_uname[i], ep->name) == 0) { 2628 struct stat st; 2629 char tty[MAXPATHLEN]; 2630 snprintf(tty, sizeof(tty), "%s/%s", _PATH_DEV, 2631 ep->line); 2632 if (stat(tty, &st) != -1 && 2633 (st.st_mode & S_IWGRP) == 0) 2634 break; 2635 2636 if ((p = ttymsg(iov, iovcnt, ep->line, 2637 TTYMSGTIME)) != NULL) { 2638 errno = 0; /* already in msg */ 2639 logerror("%s", p); 2640 } 2641 break; 2642 } 2643 } 2644 } 2645 reenter = 0; 2646 #endif /* __NetBSD_Version__ */ 2647 } 2648 2649 void 2650 /*ARGSUSED*/ 2651 reapchild(int fd, short event, void *ev) 2652 { 2653 int status; 2654 pid_t pid; 2655 struct filed *f; 2656 2657 while ((pid = wait3(&status, WNOHANG, NULL)) > 0) { 2658 if (!Initialized || ShuttingDown) { 2659 /* 2660 * Be silent while we are initializing or 2661 * shutting down. 2662 */ 2663 continue; 2664 } 2665 2666 if (deadq_remove(pid)) 2667 continue; 2668 2669 /* Now, look in the list of active processes. */ 2670 for (f = Files; f != NULL; f = f->f_next) { 2671 if (f->f_type == F_PIPE && 2672 f->f_un.f_pipe.f_pid == pid) { 2673 (void) close(f->f_file); 2674 f->f_un.f_pipe.f_pid = 0; 2675 log_deadchild(pid, status, 2676 f->f_un.f_pipe.f_pname); 2677 break; 2678 } 2679 } 2680 } 2681 } 2682 2683 /* 2684 * Return a printable representation of a host address (FQDN if available) 2685 */ 2686 const char * 2687 cvthname(struct sockaddr_storage *f) 2688 { 2689 int error; 2690 int niflag = NI_DGRAM; 2691 static char host[NI_MAXHOST], ip[NI_MAXHOST]; 2692 2693 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 2694 ip, sizeof ip, NULL, 0, NI_NUMERICHOST|niflag); 2695 2696 DPRINTF(D_CALL, "cvthname(%s)\n", ip); 2697 2698 if (error) { 2699 DPRINTF(D_NET, "Malformed from address %s\n", 2700 gai_strerror(error)); 2701 return "???"; 2702 } 2703 2704 if (!UseNameService) 2705 return ip; 2706 2707 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 2708 host, sizeof host, NULL, 0, niflag); 2709 if (error) { 2710 DPRINTF(D_NET, "Host name for your address (%s) unknown\n", ip); 2711 return ip; 2712 } 2713 2714 return host; 2715 } 2716 2717 void 2718 trim_anydomain(char *host) 2719 { 2720 bool onlydigits = true; 2721 int i; 2722 2723 if (!BSDOutputFormat) 2724 return; 2725 2726 /* if non-digits found, then assume hostname and cut at first dot (this 2727 * case also covers IPv6 addresses which should not contain dots), 2728 * if only digits then assume IPv4 address and do not cut at all */ 2729 for (i = 0; host[i]; i++) { 2730 if (host[i] == '.' && !onlydigits) 2731 host[i] = '\0'; 2732 else if (!isdigit((unsigned char)host[i]) && host[i] != '.') 2733 onlydigits = false; 2734 } 2735 } 2736 2737 static void 2738 /*ARGSUSED*/ 2739 domark(int fd, short event, void *ev) 2740 { 2741 struct event *ev_pass = (struct event *)ev; 2742 struct filed *f; 2743 dq_t q, nextq; 2744 sigset_t newmask, omask; 2745 2746 schedule_event(&ev_pass, 2747 &((struct timeval){TIMERINTVL, 0}), 2748 domark, ev_pass); 2749 DPRINTF((D_CALL|D_EVENT), "domark()\n"); 2750 2751 BLOCK_SIGNALS(omask, newmask); 2752 now = time(NULL); 2753 MarkSeq += TIMERINTVL; 2754 if (MarkSeq >= MarkInterval) { 2755 logmsg_async(LOG_INFO, NULL, "-- MARK --", ADDDATE|MARK); 2756 MarkSeq = 0; 2757 } 2758 2759 for (f = Files; f; f = f->f_next) { 2760 if (f->f_prevcount && now >= REPEATTIME(f)) { 2761 DPRINTF(D_DATA, "Flush %s: repeated %d times, %d sec.\n", 2762 TypeInfo[f->f_type].name, f->f_prevcount, 2763 repeatinterval[f->f_repeatcount]); 2764 fprintlog(f, NULL, NULL); 2765 BACKOFF(f); 2766 } 2767 } 2768 message_allqueues_check(); 2769 RESTORE_SIGNALS(omask); 2770 2771 /* Walk the dead queue, and see if we should signal somebody. */ 2772 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = nextq) { 2773 nextq = TAILQ_NEXT(q, dq_entries); 2774 switch (q->dq_timeout) { 2775 case 0: 2776 /* Already signalled once, try harder now. */ 2777 if (kill(q->dq_pid, SIGKILL) != 0) 2778 (void) deadq_remove(q->dq_pid); 2779 break; 2780 2781 case 1: 2782 /* 2783 * Timed out on the dead queue, send terminate 2784 * signal. Note that we leave the removal from 2785 * the dead queue to reapchild(), which will 2786 * also log the event (unless the process 2787 * didn't even really exist, in case we simply 2788 * drop it from the dead queue). 2789 */ 2790 if (kill(q->dq_pid, SIGTERM) != 0) { 2791 (void) deadq_remove(q->dq_pid); 2792 break; 2793 } 2794 /* FALLTHROUGH */ 2795 2796 default: 2797 q->dq_timeout--; 2798 } 2799 } 2800 #ifndef DISABLE_SIGN 2801 if (GlobalSign.rsid) { /* check if initialized */ 2802 struct signature_group_t *sg; 2803 STAILQ_FOREACH(sg, &GlobalSign.SigGroups, entries) { 2804 sign_send_certificate_block(sg); 2805 } 2806 } 2807 #endif /* !DISABLE_SIGN */ 2808 } 2809 2810 /* 2811 * Print syslogd errors some place. 2812 */ 2813 void 2814 logerror(const char *fmt, ...) 2815 { 2816 static int logerror_running; 2817 va_list ap; 2818 char tmpbuf[BUFSIZ]; 2819 char buf[BUFSIZ]; 2820 char *outbuf; 2821 2822 /* If there's an error while trying to log an error, give up. */ 2823 if (logerror_running) 2824 return; 2825 logerror_running = 1; 2826 2827 va_start(ap, fmt); 2828 (void)vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap); 2829 va_end(ap); 2830 2831 if (errno) { 2832 (void)snprintf(buf, sizeof(buf), "%s: %s", 2833 tmpbuf, strerror(errno)); 2834 outbuf = buf; 2835 } else { 2836 (void)snprintf(buf, sizeof(buf), "%s", tmpbuf); 2837 outbuf = tmpbuf; 2838 } 2839 2840 if (daemonized) 2841 logmsg_async(LOG_SYSLOG|LOG_ERR, NULL, outbuf, ADDDATE); 2842 if (!daemonized && Debug) 2843 DPRINTF(D_MISC, "%s\n", outbuf); 2844 if (!daemonized && !Debug) 2845 printf("%s\n", outbuf); 2846 2847 logerror_running = 0; 2848 } 2849 2850 /* 2851 * Print syslogd info some place. 2852 */ 2853 void 2854 loginfo(const char *fmt, ...) 2855 { 2856 va_list ap; 2857 char buf[BUFSIZ]; 2858 2859 va_start(ap, fmt); 2860 (void)vsnprintf(buf, sizeof(buf), fmt, ap); 2861 va_end(ap); 2862 2863 DPRINTF(D_MISC, "%s\n", buf); 2864 logmsg_async(LOG_SYSLOG|LOG_INFO, NULL, buf, ADDDATE); 2865 } 2866 2867 #ifndef DISABLE_TLS 2868 static inline void 2869 free_incoming_tls_sockets(void) 2870 { 2871 struct TLS_Incoming_Conn *tls_in; 2872 int i; 2873 2874 /* 2875 * close all listening and connected TLS sockets 2876 */ 2877 if (TLS_Listen_Set) 2878 for (i = 0; i < TLS_Listen_Set->fd; i++) { 2879 if (close(TLS_Listen_Set[i+1].fd) == -1) 2880 logerror("close() failed"); 2881 DEL_EVENT(TLS_Listen_Set[i+1].ev); 2882 FREEPTR(TLS_Listen_Set[i+1].ev); 2883 } 2884 FREEPTR(TLS_Listen_Set); 2885 /* close/free incoming TLS connections */ 2886 while (!SLIST_EMPTY(&TLS_Incoming_Head)) { 2887 tls_in = SLIST_FIRST(&TLS_Incoming_Head); 2888 SLIST_REMOVE_HEAD(&TLS_Incoming_Head, entries); 2889 FREEPTR(tls_in->inbuf); 2890 free_tls_conn(tls_in->tls_conn); 2891 free(tls_in); 2892 } 2893 } 2894 #endif /* !DISABLE_TLS */ 2895 2896 void 2897 /*ARGSUSED*/ 2898 die(int fd, short event, void *ev) 2899 { 2900 struct filed *f, *next; 2901 char **p; 2902 sigset_t newmask, omask; 2903 int i; 2904 size_t j; 2905 2906 ShuttingDown = 1; /* Don't log SIGCHLDs. */ 2907 /* prevent recursive signals */ 2908 BLOCK_SIGNALS(omask, newmask); 2909 2910 errno = 0; 2911 if (ev != NULL) 2912 logerror("Exiting on signal %d", fd); 2913 else 2914 logerror("Fatal error, exiting"); 2915 2916 /* 2917 * flush any pending output 2918 */ 2919 for (f = Files; f != NULL; f = f->f_next) { 2920 /* flush any pending output */ 2921 if (f->f_prevcount) 2922 fprintlog(f, NULL, NULL); 2923 SEND_QUEUE(f); 2924 } 2925 2926 #ifndef DISABLE_TLS 2927 free_incoming_tls_sockets(); 2928 #endif /* !DISABLE_TLS */ 2929 #ifndef DISABLE_SIGN 2930 sign_global_free(); 2931 #endif /* !DISABLE_SIGN */ 2932 2933 /* 2934 * Close all open log files. 2935 */ 2936 for (f = Files; f != NULL; f = next) { 2937 message_queue_freeall(f); 2938 2939 switch (f->f_type) { 2940 case F_FILE: 2941 case F_TTY: 2942 case F_CONSOLE: 2943 case F_FIFO: 2944 if (f->f_file >= 0) 2945 (void)close(f->f_file); 2946 break; 2947 case F_PIPE: 2948 if (f->f_un.f_pipe.f_pid > 0) { 2949 (void)close(f->f_file); 2950 } 2951 f->f_un.f_pipe.f_pid = 0; 2952 break; 2953 case F_FORW: 2954 if (f->f_un.f_forw.f_addr) 2955 freeaddrinfo(f->f_un.f_forw.f_addr); 2956 break; 2957 #ifndef DISABLE_TLS 2958 case F_TLS: 2959 free_tls_conn(f->f_un.f_tls.tls_conn); 2960 break; 2961 #endif /* !DISABLE_TLS */ 2962 } 2963 next = f->f_next; 2964 DELREF(f->f_prevmsg); 2965 FREEPTR(f->f_program); 2966 FREEPTR(f->f_host); 2967 DEL_EVENT(f->f_sq_event); 2968 free((char *)f); 2969 } 2970 2971 /* 2972 * Close all open UDP sockets 2973 */ 2974 if (finet) { 2975 for (i = 0; i < finet->fd; i++) { 2976 if (close(finet[i+1].fd) < 0) { 2977 logerror("close() failed"); 2978 die(0, 0, NULL); 2979 } 2980 DEL_EVENT(finet[i+1].ev); 2981 FREEPTR(finet[i+1].ev); 2982 } 2983 FREEPTR(finet); 2984 } 2985 2986 /* free config options */ 2987 for (j = 0; j < A_CNT(TypeInfo); j++) { 2988 FREEPTR(TypeInfo[j].queue_length_string); 2989 FREEPTR(TypeInfo[j].queue_size_string); 2990 } 2991 2992 #ifndef DISABLE_TLS 2993 FREEPTR(tls_opt.CAdir); 2994 FREEPTR(tls_opt.CAfile); 2995 FREEPTR(tls_opt.keyfile); 2996 FREEPTR(tls_opt.certfile); 2997 FREEPTR(tls_opt.x509verify); 2998 FREEPTR(tls_opt.bindhost); 2999 FREEPTR(tls_opt.bindport); 3000 FREEPTR(tls_opt.server); 3001 FREEPTR(tls_opt.gen_cert); 3002 free_cred_SLIST(&tls_opt.cert_head); 3003 free_cred_SLIST(&tls_opt.fprint_head); 3004 FREE_SSL_CTX(tls_opt.global_TLS_CTX); 3005 #endif /* !DISABLE_TLS */ 3006 3007 FREEPTR(funix); 3008 for (p = LogPaths; p && *p; p++) 3009 unlink(*p); 3010 exit(0); 3011 } 3012 3013 #ifndef DISABLE_SIGN 3014 /* 3015 * get one "sign_delim_sg2" item, convert and store in ordered queue 3016 */ 3017 void 3018 store_sign_delim_sg2(char *tmp_buf) 3019 { 3020 struct string_queue *sqentry, *sqe1, *sqe2; 3021 3022 if(!(sqentry = malloc(sizeof(*sqentry)))) { 3023 logerror("Unable to allocate memory"); 3024 return; 3025 } 3026 /*LINTED constcond/null effect */ 3027 assert(sizeof(int64_t) == sizeof(uint_fast64_t)); 3028 if (dehumanize_number(tmp_buf, (int64_t*) &(sqentry->key)) == -1 3029 || sqentry->key > (LOG_NFACILITIES<<3)) { 3030 DPRINTF(D_PARSE, "invalid sign_delim_sg2: %s\n", tmp_buf); 3031 free(sqentry); 3032 FREEPTR(tmp_buf); 3033 return; 3034 } 3035 sqentry->data = tmp_buf; 3036 3037 if (STAILQ_EMPTY(&GlobalSign.sig2_delims)) { 3038 STAILQ_INSERT_HEAD(&GlobalSign.sig2_delims, 3039 sqentry, entries); 3040 return; 3041 } 3042 3043 /* keep delimiters sorted */ 3044 sqe1 = sqe2 = STAILQ_FIRST(&GlobalSign.sig2_delims); 3045 if (sqe1->key > sqentry->key) { 3046 STAILQ_INSERT_HEAD(&GlobalSign.sig2_delims, 3047 sqentry, entries); 3048 return; 3049 } 3050 3051 while ((sqe1 = sqe2) 3052 && (sqe2 = STAILQ_NEXT(sqe1, entries))) { 3053 if (sqe2->key > sqentry->key) { 3054 break; 3055 } else if (sqe2->key == sqentry->key) { 3056 DPRINTF(D_PARSE, "duplicate sign_delim_sg2: %s\n", 3057 tmp_buf); 3058 FREEPTR(sqentry); 3059 FREEPTR(tmp_buf); 3060 return; 3061 } 3062 } 3063 STAILQ_INSERT_AFTER(&GlobalSign.sig2_delims, sqe1, sqentry, entries); 3064 } 3065 #endif /* !DISABLE_SIGN */ 3066 3067 /* 3068 * read syslog.conf 3069 */ 3070 void 3071 read_config_file(FILE *cf, struct filed **f_ptr) 3072 { 3073 size_t linenum = 0; 3074 size_t i; 3075 struct filed *f, **nextp; 3076 char cline[LINE_MAX]; 3077 char prog[NAME_MAX + 1]; 3078 char host[MAXHOSTNAMELEN]; 3079 const char *p; 3080 char *q; 3081 bool found_keyword; 3082 #ifndef DISABLE_TLS 3083 struct peer_cred *cred = NULL; 3084 struct peer_cred_head *credhead = NULL; 3085 #endif /* !DISABLE_TLS */ 3086 #ifndef DISABLE_SIGN 3087 char *sign_sg_str = NULL; 3088 #endif /* !DISABLE_SIGN */ 3089 #if (!defined(DISABLE_TLS) || !defined(DISABLE_SIGN)) 3090 char *tmp_buf = NULL; 3091 #endif /* (!defined(DISABLE_TLS) || !defined(DISABLE_SIGN)) */ 3092 /* central list of recognized configuration keywords 3093 * and an address for their values as strings */ 3094 const struct config_keywords { 3095 const char *keyword; 3096 char **variable; 3097 } config_keywords[] = { 3098 #ifndef DISABLE_TLS 3099 /* TLS settings */ 3100 {"tls_ca", &tls_opt.CAfile}, 3101 {"tls_cadir", &tls_opt.CAdir}, 3102 {"tls_cert", &tls_opt.certfile}, 3103 {"tls_key", &tls_opt.keyfile}, 3104 {"tls_verify", &tls_opt.x509verify}, 3105 {"tls_bindport", &tls_opt.bindport}, 3106 {"tls_bindhost", &tls_opt.bindhost}, 3107 {"tls_server", &tls_opt.server}, 3108 {"tls_gen_cert", &tls_opt.gen_cert}, 3109 /* special cases in parsing */ 3110 {"tls_allow_fingerprints",&tmp_buf}, 3111 {"tls_allow_clientcerts", &tmp_buf}, 3112 /* buffer settings */ 3113 {"tls_queue_length", &TypeInfo[F_TLS].queue_length_string}, 3114 {"tls_queue_size", &TypeInfo[F_TLS].queue_size_string}, 3115 #endif /* !DISABLE_TLS */ 3116 {"file_queue_length", &TypeInfo[F_FILE].queue_length_string}, 3117 {"pipe_queue_length", &TypeInfo[F_PIPE].queue_length_string}, 3118 {"fifo_queue_length", &TypeInfo[F_FIFO].queue_length_string}, 3119 {"file_queue_size", &TypeInfo[F_FILE].queue_size_string}, 3120 {"pipe_queue_size", &TypeInfo[F_PIPE].queue_size_string}, 3121 {"fifo_queue_size", &TypeInfo[F_FIFO].queue_size_string}, 3122 #ifndef DISABLE_SIGN 3123 /* syslog-sign setting */ 3124 {"sign_sg", &sign_sg_str}, 3125 /* also special case in parsing */ 3126 {"sign_delim_sg2", &tmp_buf}, 3127 #endif /* !DISABLE_SIGN */ 3128 }; 3129 3130 DPRINTF(D_CALL, "read_config_file()\n"); 3131 3132 /* free all previous config options */ 3133 for (i = 0; i < A_CNT(TypeInfo); i++) { 3134 if (TypeInfo[i].queue_length_string 3135 && TypeInfo[i].queue_length_string 3136 != TypeInfo[i].default_length_string) { 3137 FREEPTR(TypeInfo[i].queue_length_string); 3138 TypeInfo[i].queue_length_string = 3139 strdup(TypeInfo[i].default_length_string); 3140 } 3141 if (TypeInfo[i].queue_size_string 3142 && TypeInfo[i].queue_size_string 3143 != TypeInfo[i].default_size_string) { 3144 FREEPTR(TypeInfo[i].queue_size_string); 3145 TypeInfo[i].queue_size_string = 3146 strdup(TypeInfo[i].default_size_string); 3147 } 3148 } 3149 for (i = 0; i < A_CNT(config_keywords); i++) 3150 FREEPTR(*config_keywords[i].variable); 3151 /* 3152 * global settings 3153 */ 3154 while (fgets(cline, sizeof(cline), cf) != NULL) { 3155 linenum++; 3156 for (p = cline; isspace((unsigned char)*p); ++p) 3157 continue; 3158 if ((*p == '\0') || (*p == '#')) 3159 continue; 3160 3161 for (i = 0; i < A_CNT(config_keywords); i++) { 3162 if (copy_config_value(config_keywords[i].keyword, 3163 config_keywords[i].variable, &p, ConfFile, 3164 linenum)) { 3165 DPRINTF((D_PARSE|D_MEM), 3166 "found option %s, saved @%p\n", 3167 config_keywords[i].keyword, 3168 *config_keywords[i].variable); 3169 #ifndef DISABLE_SIGN 3170 if (!strcmp("sign_delim_sg2", 3171 config_keywords[i].keyword)) 3172 do { 3173 store_sign_delim_sg2(tmp_buf); 3174 } while (copy_config_value_word( 3175 &tmp_buf, &p)); 3176 3177 #endif /* !DISABLE_SIGN */ 3178 3179 #ifndef DISABLE_TLS 3180 /* special cases with multiple parameters */ 3181 if (!strcmp("tls_allow_fingerprints", 3182 config_keywords[i].keyword)) 3183 credhead = &tls_opt.fprint_head; 3184 else if (!strcmp("tls_allow_clientcerts", 3185 config_keywords[i].keyword)) 3186 credhead = &tls_opt.cert_head; 3187 3188 if (credhead) do { 3189 if(!(cred = malloc(sizeof(*cred)))) { 3190 logerror("Unable to " 3191 "allocate memory"); 3192 break; 3193 } 3194 cred->data = tmp_buf; 3195 tmp_buf = NULL; 3196 SLIST_INSERT_HEAD(credhead, 3197 cred, entries); 3198 } while /* additional values? */ 3199 (copy_config_value_word(&tmp_buf, &p)); 3200 credhead = NULL; 3201 break; 3202 #endif /* !DISABLE_TLS */ 3203 } 3204 } 3205 } 3206 /* convert strings to integer values */ 3207 for (i = 0; i < A_CNT(TypeInfo); i++) { 3208 if (!TypeInfo[i].queue_length_string 3209 || dehumanize_number(TypeInfo[i].queue_length_string, 3210 &TypeInfo[i].queue_length) == -1) 3211 if (dehumanize_number(TypeInfo[i].default_length_string, 3212 &TypeInfo[i].queue_length) == -1) 3213 abort(); 3214 if (!TypeInfo[i].queue_size_string 3215 || dehumanize_number(TypeInfo[i].queue_size_string, 3216 &TypeInfo[i].queue_size) == -1) 3217 if (dehumanize_number(TypeInfo[i].default_size_string, 3218 &TypeInfo[i].queue_size) == -1) 3219 abort(); 3220 } 3221 3222 #ifndef DISABLE_SIGN 3223 if (sign_sg_str) { 3224 if (sign_sg_str[1] == '\0' 3225 && (sign_sg_str[0] == '0' || sign_sg_str[0] == '1' 3226 || sign_sg_str[0] == '2' || sign_sg_str[0] == '3')) 3227 GlobalSign.sg = sign_sg_str[0] - '0'; 3228 else { 3229 GlobalSign.sg = SIGN_SG; 3230 DPRINTF(D_MISC, "Invalid sign_sg value `%s', " 3231 "use default value `%d'\n", 3232 sign_sg_str, GlobalSign.sg); 3233 } 3234 } else /* disable syslog-sign */ 3235 GlobalSign.sg = -1; 3236 #endif /* !DISABLE_SIGN */ 3237 3238 rewind(cf); 3239 linenum = 0; 3240 /* 3241 * Foreach line in the conf table, open that file. 3242 */ 3243 f = NULL; 3244 nextp = &f; 3245 3246 strcpy(prog, "*"); 3247 strcpy(host, "*"); 3248 while (fgets(cline, sizeof(cline), cf) != NULL) { 3249 linenum++; 3250 found_keyword = false; 3251 /* 3252 * check for end-of-section, comments, strip off trailing 3253 * spaces and newline character. #!prog is treated specially: 3254 * following lines apply only to that program. 3255 */ 3256 for (p = cline; isspace((unsigned char)*p); ++p) 3257 continue; 3258 if (*p == '\0') 3259 continue; 3260 if (*p == '#') { 3261 p++; 3262 if (*p != '!' && *p != '+' && *p != '-') 3263 continue; 3264 } 3265 3266 for (i = 0; i < A_CNT(config_keywords); i++) { 3267 if (!strncasecmp(p, config_keywords[i].keyword, 3268 strlen(config_keywords[i].keyword))) { 3269 DPRINTF(D_PARSE, 3270 "skip cline %zu with keyword %s\n", 3271 linenum, config_keywords[i].keyword); 3272 found_keyword = true; 3273 } 3274 } 3275 if (found_keyword) 3276 continue; 3277 3278 if (*p == '+' || *p == '-') { 3279 host[0] = *p++; 3280 while (isspace((unsigned char)*p)) 3281 p++; 3282 if (*p == '\0' || *p == '*') { 3283 strcpy(host, "*"); 3284 continue; 3285 } 3286 /* the +hostname expression will continue 3287 * to use the LocalHostName, not the FQDN */ 3288 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) { 3289 if (*p == '@') { 3290 (void)strncpy(&host[i], LocalHostName, 3291 sizeof(host) - 1 - i); 3292 host[sizeof(host) - 1] = '\0'; 3293 i = strlen(host) - 1; 3294 p++; 3295 continue; 3296 } 3297 if (!isalnum((unsigned char)*p) && 3298 *p != '.' && *p != '-' && *p != ',') 3299 break; 3300 host[i] = *p++; 3301 } 3302 host[i] = '\0'; 3303 continue; 3304 } 3305 if (*p == '!') { 3306 p++; 3307 while (isspace((unsigned char)*p)) 3308 p++; 3309 if (*p == '\0' || *p == '*') { 3310 strcpy(prog, "*"); 3311 continue; 3312 } 3313 for (i = 0; i < NAME_MAX; i++) { 3314 if (!isprint((unsigned char)p[i])) 3315 break; 3316 prog[i] = p[i]; 3317 } 3318 prog[i] = '\0'; 3319 continue; 3320 } 3321 for (q = strchr(cline, '\0'); isspace((unsigned char)*--q);) 3322 continue; 3323 *++q = '\0'; 3324 if ((f = calloc(1, sizeof(*f))) == NULL) { 3325 logerror("alloc failed"); 3326 die(0, 0, NULL); 3327 } 3328 if (!*f_ptr) *f_ptr = f; /* return first node */ 3329 *nextp = f; 3330 nextp = &f->f_next; 3331 cfline(linenum, cline, f, prog, host); 3332 } 3333 } 3334 3335 /* 3336 * INIT -- Initialize syslogd from configuration table 3337 */ 3338 void 3339 /*ARGSUSED*/ 3340 init(int fd, short event, void *ev) 3341 { 3342 FILE *cf; 3343 int i; 3344 struct filed *f, *newf, **nextp, *f2; 3345 char *p; 3346 sigset_t newmask, omask; 3347 #ifndef DISABLE_TLS 3348 char *tls_status_msg = NULL; 3349 struct peer_cred *cred = NULL; 3350 #endif /* !DISABLE_TLS */ 3351 3352 /* prevent recursive signals */ 3353 BLOCK_SIGNALS(omask, newmask); 3354 3355 DPRINTF((D_EVENT|D_CALL), "init\n"); 3356 3357 /* 3358 * be careful about dependencies and order of actions: 3359 * 1. flush buffer queues 3360 * 2. flush -sign SBs 3361 * 3. flush/delete buffer queue again, in case an SB got there 3362 * 4. close files/connections 3363 */ 3364 3365 /* 3366 * flush any pending output 3367 */ 3368 for (f = Files; f != NULL; f = f->f_next) { 3369 /* flush any pending output */ 3370 if (f->f_prevcount) 3371 fprintlog(f, NULL, NULL); 3372 SEND_QUEUE(f); 3373 } 3374 /* some actions only on SIGHUP and not on first start */ 3375 if (Initialized) { 3376 #ifndef DISABLE_SIGN 3377 sign_global_free(); 3378 #endif /* !DISABLE_SIGN */ 3379 #ifndef DISABLE_TLS 3380 free_incoming_tls_sockets(); 3381 #endif /* !DISABLE_TLS */ 3382 Initialized = 0; 3383 } 3384 /* 3385 * Close all open log files. 3386 */ 3387 for (f = Files; f != NULL; f = f->f_next) { 3388 switch (f->f_type) { 3389 case F_FILE: 3390 case F_TTY: 3391 case F_CONSOLE: 3392 (void)close(f->f_file); 3393 break; 3394 case F_PIPE: 3395 if (f->f_un.f_pipe.f_pid > 0) { 3396 (void)close(f->f_file); 3397 deadq_enter(f->f_un.f_pipe.f_pid, 3398 f->f_un.f_pipe.f_pname); 3399 } 3400 f->f_un.f_pipe.f_pid = 0; 3401 break; 3402 case F_FORW: 3403 if (f->f_un.f_forw.f_addr) 3404 freeaddrinfo(f->f_un.f_forw.f_addr); 3405 break; 3406 #ifndef DISABLE_TLS 3407 case F_TLS: 3408 free_tls_sslptr(f->f_un.f_tls.tls_conn); 3409 break; 3410 #endif /* !DISABLE_TLS */ 3411 } 3412 } 3413 3414 /* 3415 * Close all open UDP sockets 3416 */ 3417 if (finet) { 3418 for (i = 0; i < finet->fd; i++) { 3419 if (close(finet[i+1].fd) < 0) { 3420 logerror("close() failed"); 3421 die(0, 0, NULL); 3422 } 3423 DEL_EVENT(finet[i+1].ev); 3424 FREEPTR(finet[i+1].ev); 3425 } 3426 FREEPTR(finet); 3427 } 3428 3429 /* get FQDN and hostname/domain */ 3430 FREEPTR(oldLocalFQDN); 3431 oldLocalFQDN = LocalFQDN; 3432 LocalFQDN = getLocalFQDN(); 3433 if ((p = strchr(LocalFQDN, '.')) != NULL) 3434 (void)strlcpy(LocalHostName, LocalFQDN, 1+p-LocalFQDN); 3435 else 3436 (void)strlcpy(LocalHostName, LocalFQDN, sizeof(LocalHostName)); 3437 3438 /* 3439 * Reset counter of forwarding actions 3440 */ 3441 3442 NumForwards=0; 3443 3444 /* new destination list to replace Files */ 3445 newf = NULL; 3446 nextp = &newf; 3447 3448 /* open the configuration file */ 3449 if ((cf = fopen(ConfFile, "r")) == NULL) { 3450 DPRINTF(D_FILE, "Cannot open `%s'\n", ConfFile); 3451 *nextp = (struct filed *)calloc(1, sizeof(*f)); 3452 cfline(0, "*.ERR\t/dev/console", *nextp, "*", "*"); 3453 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f)); 3454 cfline(0, "*.PANIC\t*", (*nextp)->f_next, "*", "*"); 3455 Initialized = 1; 3456 RESTORE_SIGNALS(omask); 3457 return; 3458 } 3459 3460 #ifndef DISABLE_TLS 3461 /* init with new TLS_CTX 3462 * as far as I see one cannot change the cert/key of an existing CTX 3463 */ 3464 FREE_SSL_CTX(tls_opt.global_TLS_CTX); 3465 3466 free_cred_SLIST(&tls_opt.cert_head); 3467 free_cred_SLIST(&tls_opt.fprint_head); 3468 #endif /* !DISABLE_TLS */ 3469 3470 /* read and close configuration file */ 3471 read_config_file(cf, &newf); 3472 newf = *nextp; 3473 (void)fclose(cf); 3474 DPRINTF(D_MISC, "read_config_file() returned newf=%p\n", newf); 3475 3476 #define MOVE_QUEUE(dst, src) do { \ 3477 struct buf_queue *buf; \ 3478 STAILQ_CONCAT(&dst->f_qhead, &src->f_qhead); \ 3479 STAILQ_FOREACH(buf, &dst->f_qhead, entries) { \ 3480 dst->f_qelements++; \ 3481 dst->f_qsize += buf_queue_obj_size(buf); \ 3482 } \ 3483 src->f_qsize = 0; \ 3484 src->f_qelements = 0; \ 3485 } while (/*CONSTCOND*/0) 3486 3487 /* 3488 * Free old log files. 3489 */ 3490 for (f = Files; f != NULL;) { 3491 struct filed *ftmp; 3492 3493 /* check if a new logfile is equal, if so pass the queue */ 3494 for (f2 = newf; f2 != NULL; f2 = f2->f_next) { 3495 if (f->f_type == f2->f_type 3496 && ((f->f_type == F_PIPE 3497 && !strcmp(f->f_un.f_pipe.f_pname, 3498 f2->f_un.f_pipe.f_pname)) 3499 #ifndef DISABLE_TLS 3500 || (f->f_type == F_TLS 3501 && !strcmp(f->f_un.f_tls.tls_conn->hostname, 3502 f2->f_un.f_tls.tls_conn->hostname) 3503 && !strcmp(f->f_un.f_tls.tls_conn->port, 3504 f2->f_un.f_tls.tls_conn->port)) 3505 #endif /* !DISABLE_TLS */ 3506 || (f->f_type == F_FORW 3507 && !strcmp(f->f_un.f_forw.f_hname, 3508 f2->f_un.f_forw.f_hname)))) { 3509 DPRINTF(D_BUFFER, "move queue from f@%p " 3510 "to f2@%p\n", f, f2); 3511 MOVE_QUEUE(f2, f); 3512 } 3513 } 3514 message_queue_freeall(f); 3515 DELREF(f->f_prevmsg); 3516 #ifndef DISABLE_TLS 3517 if (f->f_type == F_TLS) 3518 free_tls_conn(f->f_un.f_tls.tls_conn); 3519 #endif /* !DISABLE_TLS */ 3520 FREEPTR(f->f_program); 3521 FREEPTR(f->f_host); 3522 DEL_EVENT(f->f_sq_event); 3523 3524 ftmp = f->f_next; 3525 free((char *)f); 3526 f = ftmp; 3527 } 3528 Files = newf; 3529 Initialized = 1; 3530 3531 if (Debug) { 3532 for (f = Files; f; f = f->f_next) { 3533 for (i = 0; i <= LOG_NFACILITIES; i++) 3534 if (f->f_pmask[i] == INTERNAL_NOPRI) 3535 printf("X "); 3536 else 3537 printf("%d ", f->f_pmask[i]); 3538 printf("%s: ", TypeInfo[f->f_type].name); 3539 switch (f->f_type) { 3540 case F_FILE: 3541 case F_TTY: 3542 case F_CONSOLE: 3543 case F_FIFO: 3544 printf("%s", f->f_un.f_fname); 3545 break; 3546 3547 case F_FORW: 3548 printf("%s", f->f_un.f_forw.f_hname); 3549 break; 3550 #ifndef DISABLE_TLS 3551 case F_TLS: 3552 printf("[%s]", f->f_un.f_tls.tls_conn->hostname); 3553 break; 3554 #endif /* !DISABLE_TLS */ 3555 case F_PIPE: 3556 printf("%s", f->f_un.f_pipe.f_pname); 3557 break; 3558 3559 case F_USERS: 3560 for (i = 0; 3561 i < MAXUNAMES && *f->f_un.f_uname[i]; i++) 3562 printf("%s, ", f->f_un.f_uname[i]); 3563 break; 3564 } 3565 if (f->f_program != NULL) 3566 printf(" (%s)", f->f_program); 3567 printf("\n"); 3568 } 3569 } 3570 3571 finet = socksetup(PF_UNSPEC, bindhostname); 3572 if (finet) { 3573 if (SecureMode) { 3574 for (i = 0; i < finet->fd; i++) { 3575 if (shutdown(finet[i+1].fd, SHUT_RD) < 0) { 3576 logerror("shutdown() failed"); 3577 die(0, 0, NULL); 3578 } 3579 } 3580 } else 3581 DPRINTF(D_NET, "Listening on inet and/or inet6 socket\n"); 3582 DPRINTF(D_NET, "Sending on inet and/or inet6 socket\n"); 3583 } 3584 3585 #ifndef DISABLE_TLS 3586 /* TLS setup -- after all local destinations opened */ 3587 DPRINTF(D_PARSE, "Parsed options: tls_ca: %s, tls_cadir: %s, " 3588 "tls_cert: %s, tls_key: %s, tls_verify: %s, " 3589 "bind: %s:%s, max. queue_lengths: %" 3590 PRId64 ", %" PRId64 ", %" PRId64 ", " 3591 "max. queue_sizes: %" 3592 PRId64 ", %" PRId64 ", %" PRId64 "\n", 3593 tls_opt.CAfile, tls_opt.CAdir, 3594 tls_opt.certfile, tls_opt.keyfile, tls_opt.x509verify, 3595 tls_opt.bindhost, tls_opt.bindport, 3596 TypeInfo[F_TLS].queue_length, TypeInfo[F_FILE].queue_length, 3597 TypeInfo[F_PIPE].queue_length, 3598 TypeInfo[F_TLS].queue_size, TypeInfo[F_FILE].queue_size, 3599 TypeInfo[F_PIPE].queue_size); 3600 SLIST_FOREACH(cred, &tls_opt.cert_head, entries) { 3601 DPRINTF(D_PARSE, "Accepting peer certificate " 3602 "from file: \"%s\"\n", cred->data); 3603 } 3604 SLIST_FOREACH(cred, &tls_opt.fprint_head, entries) { 3605 DPRINTF(D_PARSE, "Accepting peer certificate with " 3606 "fingerprint: \"%s\"\n", cred->data); 3607 } 3608 3609 /* Note: The order of initialization is important because syslog-sign 3610 * should use the TLS cert for signing. -- So we check first if TLS 3611 * will be used and initialize it before starting -sign. 3612 * 3613 * This means that if we are a client without TLS destinations TLS 3614 * will not be initialized and syslog-sign will generate a new key. 3615 * -- Even if the user has set a usable tls_cert. 3616 * Is this the expected behaviour? The alternative would be to always 3617 * initialize the TLS structures, even if they will not be needed 3618 * (or only needed to read the DSA key for -sign). 3619 */ 3620 3621 /* Initialize TLS only if used */ 3622 if (tls_opt.server) 3623 tls_status_msg = init_global_TLS_CTX(); 3624 else 3625 for (f = Files; f; f = f->f_next) { 3626 if (f->f_type != F_TLS) 3627 continue; 3628 tls_status_msg = init_global_TLS_CTX(); 3629 break; 3630 } 3631 3632 #endif /* !DISABLE_TLS */ 3633 3634 #ifndef DISABLE_SIGN 3635 /* only initialize -sign if actually used */ 3636 if (GlobalSign.sg == 0 || GlobalSign.sg == 1 || GlobalSign.sg == 2) 3637 (void)sign_global_init(Files); 3638 else if (GlobalSign.sg == 3) 3639 for (f = Files; f; f = f->f_next) 3640 if (f->f_flags & FFLAG_SIGN) { 3641 (void)sign_global_init(Files); 3642 break; 3643 } 3644 #endif /* !DISABLE_SIGN */ 3645 3646 #ifndef DISABLE_TLS 3647 if (tls_status_msg) { 3648 loginfo("%s", tls_status_msg); 3649 free(tls_status_msg); 3650 } 3651 DPRINTF((D_NET|D_TLS), "Preparing sockets for TLS\n"); 3652 TLS_Listen_Set = 3653 socksetup_tls(PF_UNSPEC, tls_opt.bindhost, tls_opt.bindport); 3654 3655 for (f = Files; f; f = f->f_next) { 3656 if (f->f_type != F_TLS) 3657 continue; 3658 if (!tls_connect(f->f_un.f_tls.tls_conn)) { 3659 logerror("Unable to connect to TLS server %s", 3660 f->f_un.f_tls.tls_conn->hostname); 3661 /* Reconnect after x seconds */ 3662 schedule_event(&f->f_un.f_tls.tls_conn->event, 3663 &((struct timeval){TLS_RECONNECT_SEC, 0}), 3664 tls_reconnect, f->f_un.f_tls.tls_conn); 3665 } 3666 } 3667 #endif /* !DISABLE_TLS */ 3668 3669 loginfo("restart"); 3670 /* 3671 * Log a change in hostname, but only on a restart (we detect this 3672 * by checking to see if we're passed a kevent). 3673 */ 3674 if (oldLocalFQDN && strcmp(oldLocalFQDN, LocalFQDN) != 0) 3675 loginfo("host name changed, \"%s\" to \"%s\"", 3676 oldLocalFQDN, LocalFQDN); 3677 3678 RESTORE_SIGNALS(omask); 3679 } 3680 3681 /* 3682 * Crack a configuration file line 3683 */ 3684 void 3685 cfline(size_t linenum, const char *line, struct filed *f, const char *prog, 3686 const char *host) 3687 { 3688 struct addrinfo hints, *res; 3689 int error, i, pri, syncfile; 3690 const char *p, *q; 3691 char *bp; 3692 char buf[MAXLINE]; 3693 struct stat sb; 3694 3695 DPRINTF((D_CALL|D_PARSE), 3696 "cfline(%zu, \"%s\", f, \"%s\", \"%s\")\n", 3697 linenum, line, prog, host); 3698 3699 errno = 0; /* keep strerror() stuff out of logerror messages */ 3700 3701 /* clear out file entry */ 3702 memset(f, 0, sizeof(*f)); 3703 for (i = 0; i <= LOG_NFACILITIES; i++) 3704 f->f_pmask[i] = INTERNAL_NOPRI; 3705 STAILQ_INIT(&f->f_qhead); 3706 3707 /* 3708 * There should not be any space before the log facility. 3709 * Check this is okay, complain and fix if it is not. 3710 */ 3711 q = line; 3712 if (isblank((unsigned char)*line)) { 3713 errno = 0; 3714 logerror("Warning: `%s' space or tab before the log facility", 3715 line); 3716 /* Fix: strip all spaces/tabs before the log facility */ 3717 while (*q++ && isblank((unsigned char)*q)) 3718 /* skip blanks */; 3719 line = q; 3720 } 3721 3722 /* 3723 * q is now at the first char of the log facility 3724 * There should be at least one tab after the log facility 3725 * Check this is okay, and complain and fix if it is not. 3726 */ 3727 q = line + strlen(line); 3728 while (!isblank((unsigned char)*q) && (q != line)) 3729 q--; 3730 if ((q == line) && strlen(line)) { 3731 /* No tabs or space in a non empty line: complain */ 3732 errno = 0; 3733 logerror( 3734 "Error: `%s' log facility or log target missing", 3735 line); 3736 return; 3737 } 3738 3739 /* save host name, if any */ 3740 if (*host == '*') 3741 f->f_host = NULL; 3742 else { 3743 f->f_host = strdup(host); 3744 trim_anydomain(&f->f_host[1]); /* skip +/- at beginning */ 3745 } 3746 3747 /* save program name, if any */ 3748 if (*prog == '*') 3749 f->f_program = NULL; 3750 else 3751 f->f_program = strdup(prog); 3752 3753 /* scan through the list of selectors */ 3754 for (p = line; *p && !isblank((unsigned char)*p);) { 3755 int pri_done, pri_cmp, pri_invert; 3756 3757 /* find the end of this facility name list */ 3758 for (q = p; *q && !isblank((unsigned char)*q) && *q++ != '.'; ) 3759 continue; 3760 3761 /* get the priority comparison */ 3762 pri_cmp = 0; 3763 pri_done = 0; 3764 pri_invert = 0; 3765 if (*q == '!') { 3766 pri_invert = 1; 3767 q++; 3768 } 3769 while (! pri_done) { 3770 switch (*q) { 3771 case '<': 3772 pri_cmp = PRI_LT; 3773 q++; 3774 break; 3775 case '=': 3776 pri_cmp = PRI_EQ; 3777 q++; 3778 break; 3779 case '>': 3780 pri_cmp = PRI_GT; 3781 q++; 3782 break; 3783 default: 3784 pri_done = 1; 3785 break; 3786 } 3787 } 3788 3789 /* collect priority name */ 3790 for (bp = buf; *q && !strchr("\t ,;", *q); ) 3791 *bp++ = *q++; 3792 *bp = '\0'; 3793 3794 /* skip cruft */ 3795 while (strchr(",;", *q)) 3796 q++; 3797 3798 /* decode priority name */ 3799 if (*buf == '*') { 3800 pri = LOG_PRIMASK + 1; 3801 pri_cmp = PRI_LT | PRI_EQ | PRI_GT; 3802 } else { 3803 pri = decode(buf, prioritynames); 3804 if (pri < 0) { 3805 errno = 0; 3806 logerror("Unknown priority name `%s'", buf); 3807 return; 3808 } 3809 } 3810 if (pri_cmp == 0) 3811 pri_cmp = UniquePriority ? PRI_EQ 3812 : PRI_EQ | PRI_GT; 3813 if (pri_invert) 3814 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT; 3815 3816 /* scan facilities */ 3817 while (*p && !strchr("\t .;", *p)) { 3818 for (bp = buf; *p && !strchr("\t ,;.", *p); ) 3819 *bp++ = *p++; 3820 *bp = '\0'; 3821 if (*buf == '*') 3822 for (i = 0; i < LOG_NFACILITIES; i++) { 3823 f->f_pmask[i] = pri; 3824 f->f_pcmp[i] = pri_cmp; 3825 } 3826 else { 3827 i = decode(buf, facilitynames); 3828 if (i < 0) { 3829 errno = 0; 3830 logerror("Unknown facility name `%s'", 3831 buf); 3832 return; 3833 } 3834 f->f_pmask[i >> 3] = pri; 3835 f->f_pcmp[i >> 3] = pri_cmp; 3836 } 3837 while (*p == ',' || *p == ' ') 3838 p++; 3839 } 3840 3841 p = q; 3842 } 3843 3844 /* skip to action part */ 3845 while (isblank((unsigned char)*p)) 3846 p++; 3847 3848 /* 3849 * should this be "#ifndef DISABLE_SIGN" or is it a general option? 3850 * '+' before file destination: write with PRI field for later 3851 * verification 3852 */ 3853 if (*p == '+') { 3854 f->f_flags |= FFLAG_FULL; 3855 p++; 3856 } 3857 if (*p == '-') { 3858 syncfile = 0; 3859 p++; 3860 } else 3861 syncfile = 1; 3862 3863 switch (*p) { 3864 case '@': 3865 #ifndef DISABLE_SIGN 3866 if (GlobalSign.sg == 3) 3867 f->f_flags |= FFLAG_SIGN; 3868 #endif /* !DISABLE_SIGN */ 3869 #ifndef DISABLE_TLS 3870 if (*(p+1) == '[') { 3871 /* TLS destination */ 3872 if (!parse_tls_destination(p, f, linenum)) { 3873 logerror("Unable to parse action %s", p); 3874 break; 3875 } 3876 f->f_type = F_TLS; 3877 break; 3878 } 3879 #endif /* !DISABLE_TLS */ 3880 (void)strlcpy(f->f_un.f_forw.f_hname, ++p, 3881 sizeof(f->f_un.f_forw.f_hname)); 3882 memset(&hints, 0, sizeof(hints)); 3883 hints.ai_family = AF_UNSPEC; 3884 hints.ai_socktype = SOCK_DGRAM; 3885 hints.ai_protocol = 0; 3886 error = getaddrinfo(f->f_un.f_forw.f_hname, "syslog", &hints, 3887 &res); 3888 if (error) { 3889 errno = 0; 3890 logerror("%s", gai_strerror(error)); 3891 break; 3892 } 3893 f->f_un.f_forw.f_addr = res; 3894 f->f_type = F_FORW; 3895 NumForwards++; 3896 break; 3897 3898 case '/': 3899 #ifndef DISABLE_SIGN 3900 if (GlobalSign.sg == 3) 3901 f->f_flags |= FFLAG_SIGN; 3902 #endif /* !DISABLE_SIGN */ 3903 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname)); 3904 if ((f->f_file = open(p, O_WRONLY|O_APPEND|O_NONBLOCK, 0)) < 0) 3905 { 3906 f->f_type = F_UNUSED; 3907 logerror("%s", p); 3908 break; 3909 } 3910 if (!fstat(f->f_file, &sb) && S_ISFIFO(sb.st_mode)) { 3911 f->f_file = -1; 3912 f->f_type = F_FIFO; 3913 break; 3914 } 3915 3916 if (isatty(f->f_file)) { 3917 f->f_type = F_TTY; 3918 if (strcmp(p, ctty) == 0) 3919 f->f_type = F_CONSOLE; 3920 } else 3921 f->f_type = F_FILE; 3922 3923 if (syncfile) 3924 f->f_flags |= FFLAG_SYNC; 3925 break; 3926 3927 case '|': 3928 #ifndef DISABLE_SIGN 3929 if (GlobalSign.sg == 3) 3930 f->f_flags |= FFLAG_SIGN; 3931 #endif 3932 f->f_un.f_pipe.f_pid = 0; 3933 (void) strlcpy(f->f_un.f_pipe.f_pname, p + 1, 3934 sizeof(f->f_un.f_pipe.f_pname)); 3935 f->f_type = F_PIPE; 3936 break; 3937 3938 case '*': 3939 f->f_type = F_WALL; 3940 break; 3941 3942 default: 3943 for (i = 0; i < MAXUNAMES && *p; i++) { 3944 for (q = p; *q && *q != ','; ) 3945 q++; 3946 (void)strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE); 3947 if ((q - p) > UT_NAMESIZE) 3948 f->f_un.f_uname[i][UT_NAMESIZE] = '\0'; 3949 else 3950 f->f_un.f_uname[i][q - p] = '\0'; 3951 while (*q == ',' || *q == ' ') 3952 q++; 3953 p = q; 3954 } 3955 f->f_type = F_USERS; 3956 break; 3957 } 3958 } 3959 3960 3961 /* 3962 * Decode a symbolic name to a numeric value 3963 */ 3964 int 3965 decode(const char *name, CODE *codetab) 3966 { 3967 CODE *c; 3968 char *p, buf[40]; 3969 3970 if (isdigit((unsigned char)*name)) 3971 return atoi(name); 3972 3973 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) { 3974 if (isupper((unsigned char)*name)) 3975 *p = tolower((unsigned char)*name); 3976 else 3977 *p = *name; 3978 } 3979 *p = '\0'; 3980 for (c = codetab; c->c_name; c++) 3981 if (!strcmp(buf, c->c_name)) 3982 return c->c_val; 3983 3984 return -1; 3985 } 3986 3987 /* 3988 * Retrieve the size of the kernel message buffer, via sysctl. 3989 */ 3990 int 3991 getmsgbufsize(void) 3992 { 3993 #ifdef __NetBSD_Version__ 3994 int msgbufsize, mib[2]; 3995 size_t size; 3996 3997 mib[0] = CTL_KERN; 3998 mib[1] = KERN_MSGBUFSIZE; 3999 size = sizeof msgbufsize; 4000 if (sysctl(mib, 2, &msgbufsize, &size, NULL, 0) == -1) { 4001 DPRINTF(D_MISC, "Couldn't get kern.msgbufsize\n"); 4002 return 0; 4003 } 4004 return msgbufsize; 4005 #else 4006 return MAXLINE; 4007 #endif /* __NetBSD_Version__ */ 4008 } 4009 4010 /* 4011 * Retrieve the hostname, via sysctl. 4012 */ 4013 char * 4014 getLocalFQDN(void) 4015 { 4016 int mib[2]; 4017 char *hostname; 4018 size_t len; 4019 4020 mib[0] = CTL_KERN; 4021 mib[1] = KERN_HOSTNAME; 4022 sysctl(mib, 2, NULL, &len, NULL, 0); 4023 4024 if (!(hostname = malloc(len))) { 4025 logerror("Unable to allocate memory"); 4026 die(0,0,NULL); 4027 } else if (sysctl(mib, 2, hostname, &len, NULL, 0) == -1) { 4028 DPRINTF(D_MISC, "Couldn't get kern.hostname\n"); 4029 (void)gethostname(hostname, sizeof(len)); 4030 } 4031 return hostname; 4032 } 4033 4034 struct socketEvent * 4035 socksetup(int af, const char *hostname) 4036 { 4037 struct addrinfo hints, *res, *r; 4038 int error, maxs; 4039 int on = 1; 4040 struct socketEvent *s, *socks; 4041 4042 if(SecureMode && !NumForwards) 4043 return NULL; 4044 4045 memset(&hints, 0, sizeof(hints)); 4046 hints.ai_flags = AI_PASSIVE; 4047 hints.ai_family = af; 4048 hints.ai_socktype = SOCK_DGRAM; 4049 error = getaddrinfo(hostname, "syslog", &hints, &res); 4050 if (error) { 4051 errno = 0; 4052 logerror("%s", gai_strerror(error)); 4053 die(0, 0, NULL); 4054 } 4055 4056 /* Count max number of sockets we may open */ 4057 for (maxs = 0, r = res; r; r = r->ai_next, maxs++) 4058 continue; 4059 socks = calloc(maxs+1, sizeof(*socks)); 4060 if (!socks) { 4061 logerror("Couldn't allocate memory for sockets"); 4062 die(0, 0, NULL); 4063 } 4064 4065 socks->fd = 0; /* num of sockets counter at start of array */ 4066 s = socks + 1; 4067 for (r = res; r; r = r->ai_next) { 4068 s->fd = socket(r->ai_family, r->ai_socktype, r->ai_protocol); 4069 if (s->fd < 0) { 4070 logerror("socket() failed"); 4071 continue; 4072 } 4073 s->af = r->ai_family; 4074 if (r->ai_family == AF_INET6 && setsockopt(s->fd, IPPROTO_IPV6, 4075 IPV6_V6ONLY, &on, sizeof(on)) < 0) { 4076 logerror("setsockopt(IPV6_V6ONLY) failed"); 4077 close(s->fd); 4078 continue; 4079 } 4080 4081 if (!SecureMode) { 4082 if (bind(s->fd, r->ai_addr, r->ai_addrlen) < 0) { 4083 logerror("bind() failed"); 4084 close(s->fd); 4085 continue; 4086 } 4087 s->ev = allocev(); 4088 event_set(s->ev, s->fd, EV_READ | EV_PERSIST, 4089 dispatch_read_finet, s->ev); 4090 if (event_add(s->ev, NULL) == -1) { 4091 DPRINTF((D_EVENT|D_NET), 4092 "Failure in event_add()\n"); 4093 } else { 4094 DPRINTF((D_EVENT|D_NET), 4095 "Listen on UDP port " 4096 "(event@%p)\n", s->ev); 4097 } 4098 } 4099 4100 socks->fd++; /* num counter */ 4101 s++; 4102 } 4103 4104 if (res) 4105 freeaddrinfo(res); 4106 if (socks->fd == 0) { 4107 free (socks); 4108 if(Debug) 4109 return NULL; 4110 else 4111 die(0, 0, NULL); 4112 } 4113 return socks; 4114 } 4115 4116 /* 4117 * Fairly similar to popen(3), but returns an open descriptor, as opposed 4118 * to a FILE *. 4119 */ 4120 int 4121 p_open(char *prog, pid_t *rpid) 4122 { 4123 static char sh[] = "sh", mc[] = "-c"; 4124 int pfd[2], nulldesc, i; 4125 pid_t pid; 4126 char *argv[4]; /* sh -c cmd NULL */ 4127 4128 if (pipe(pfd) == -1) 4129 return -1; 4130 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1) { 4131 /* We are royally screwed anyway. */ 4132 return -1; 4133 } 4134 4135 switch ((pid = fork())) { 4136 case -1: 4137 (void) close(nulldesc); 4138 return -1; 4139 4140 case 0: 4141 argv[0] = sh; 4142 argv[1] = mc; 4143 argv[2] = prog; 4144 argv[3] = NULL; 4145 4146 (void) setsid(); /* avoid catching SIGHUPs. */ 4147 4148 /* 4149 * Reset ignored signals to their default behavior. 4150 */ 4151 (void)signal(SIGTERM, SIG_DFL); 4152 (void)signal(SIGINT, SIG_DFL); 4153 (void)signal(SIGQUIT, SIG_DFL); 4154 (void)signal(SIGPIPE, SIG_DFL); 4155 (void)signal(SIGHUP, SIG_DFL); 4156 4157 dup2(pfd[0], STDIN_FILENO); 4158 dup2(nulldesc, STDOUT_FILENO); 4159 dup2(nulldesc, STDERR_FILENO); 4160 for (i = getdtablesize(); i > 2; i--) 4161 (void) close(i); 4162 4163 (void) execvp(_PATH_BSHELL, argv); 4164 _exit(255); 4165 } 4166 4167 (void) close(nulldesc); 4168 (void) close(pfd[0]); 4169 4170 /* 4171 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are 4172 * supposed to get an EWOULDBLOCK on writev(2), which is 4173 * caught by the logic above anyway, which will in turn 4174 * close the pipe, and fork a new logging subprocess if 4175 * necessary. The stale subprocess will be killed some 4176 * time later unless it terminated itself due to closing 4177 * its input pipe. 4178 */ 4179 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) { 4180 /* This is bad. */ 4181 logerror("Warning: cannot change pipe to pid %d to " 4182 "non-blocking.", (int) pid); 4183 } 4184 *rpid = pid; 4185 return pfd[1]; 4186 } 4187 4188 void 4189 deadq_enter(pid_t pid, const char *name) 4190 { 4191 dq_t p; 4192 int status; 4193 4194 /* 4195 * Be paranoid: if we can't signal the process, don't enter it 4196 * into the dead queue (perhaps it's already dead). If possible, 4197 * we try to fetch and log the child's status. 4198 */ 4199 if (kill(pid, 0) != 0) { 4200 if (waitpid(pid, &status, WNOHANG) > 0) 4201 log_deadchild(pid, status, name); 4202 return; 4203 } 4204 4205 p = malloc(sizeof(*p)); 4206 if (p == NULL) { 4207 logerror("panic: out of memory!"); 4208 exit(1); 4209 } 4210 4211 p->dq_pid = pid; 4212 p->dq_timeout = DQ_TIMO_INIT; 4213 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries); 4214 } 4215 4216 int 4217 deadq_remove(pid_t pid) 4218 { 4219 dq_t q; 4220 4221 for (q = TAILQ_FIRST(&deadq_head); q != NULL; 4222 q = TAILQ_NEXT(q, dq_entries)) { 4223 if (q->dq_pid == pid) { 4224 TAILQ_REMOVE(&deadq_head, q, dq_entries); 4225 free(q); 4226 return 1; 4227 } 4228 } 4229 return 0; 4230 } 4231 4232 void 4233 log_deadchild(pid_t pid, int status, const char *name) 4234 { 4235 int code; 4236 char buf[256]; 4237 const char *reason; 4238 4239 /* Keep strerror() struff out of logerror messages. */ 4240 errno = 0; 4241 if (WIFSIGNALED(status)) { 4242 reason = "due to signal"; 4243 code = WTERMSIG(status); 4244 } else { 4245 reason = "with status"; 4246 code = WEXITSTATUS(status); 4247 if (code == 0) 4248 return; 4249 } 4250 (void) snprintf(buf, sizeof(buf), 4251 "Logging subprocess %d (%s) exited %s %d.", 4252 pid, name, reason, code); 4253 logerror("%s", buf); 4254 } 4255 4256 struct event * 4257 allocev(void) 4258 { 4259 struct event *ev; 4260 4261 if (!(ev = calloc(1, sizeof(*ev)))) 4262 logerror("Unable to allocate memory"); 4263 return ev; 4264 } 4265 4266 /* *ev is allocated if necessary */ 4267 void 4268 schedule_event(struct event **ev, struct timeval *tv, 4269 void (*cb)(int, short, void *), void *arg) 4270 { 4271 if (!*ev && !(*ev = allocev())) { 4272 return; 4273 } 4274 event_set(*ev, 0, 0, cb, arg); 4275 DPRINTF(D_EVENT, "event_add(%s@%p)\n", "schedule_ev", *ev); \ 4276 if (event_add(*ev, tv) == -1) { 4277 DPRINTF(D_EVENT, "Failure in event_add()\n"); 4278 } 4279 } 4280 4281 #ifndef DISABLE_TLS 4282 /* abbreviation for freeing credential lists */ 4283 void 4284 free_cred_SLIST(struct peer_cred_head *head) 4285 { 4286 struct peer_cred *cred; 4287 4288 while (!SLIST_EMPTY(head)) { 4289 cred = SLIST_FIRST(head); 4290 SLIST_REMOVE_HEAD(head, entries); 4291 FREEPTR(cred->data); 4292 free(cred); 4293 } 4294 } 4295 #endif /* !DISABLE_TLS */ 4296 4297 /* 4298 * send message queue after reconnect 4299 */ 4300 /*ARGSUSED*/ 4301 void 4302 send_queue(int fd, short event, void *arg) 4303 { 4304 struct filed *f = (struct filed *) arg; 4305 struct buf_queue *qentry; 4306 #define SQ_CHUNK_SIZE 250 4307 size_t cnt = 0; 4308 4309 #ifndef DISABLE_TLS 4310 if (f->f_type == F_TLS) { 4311 /* use a flag to prevent recursive calls to send_queue() */ 4312 if (f->f_un.f_tls.tls_conn->send_queue) 4313 return; 4314 else 4315 f->f_un.f_tls.tls_conn->send_queue = true; 4316 } 4317 DPRINTF((D_DATA|D_CALL), "send_queue(f@%p with %zu msgs, " 4318 "cnt@%p = %zu)\n", f, f->f_qelements, &cnt, cnt); 4319 #endif /* !DISABLE_TLS */ 4320 4321 while ((qentry = STAILQ_FIRST(&f->f_qhead))) { 4322 #ifndef DISABLE_TLS 4323 /* send_queue() might be called with an unconnected destination 4324 * from init() or die() or one message might take longer, 4325 * leaving the connection in state ST_WAITING and thus not 4326 * ready for the next message. 4327 * this check is a shortcut to skip these unnecessary calls */ 4328 if (f->f_type == F_TLS 4329 && f->f_un.f_tls.tls_conn->state != ST_TLS_EST) { 4330 DPRINTF(D_TLS, "abort send_queue(cnt@%p = %zu) " 4331 "on TLS connection in state %d\n", 4332 &cnt, cnt, f->f_un.f_tls.tls_conn->state); 4333 return; 4334 } 4335 #endif /* !DISABLE_TLS */ 4336 fprintlog(f, qentry->msg, qentry); 4337 4338 /* Sending a long queue can take some time during which 4339 * SIGHUP and SIGALRM are blocked and no events are handled. 4340 * To avoid that we only send SQ_CHUNK_SIZE messages at once 4341 * and then reschedule ourselves to continue. Thus the control 4342 * will return first from all signal-protected functions so a 4343 * possible SIGHUP/SIGALRM is handled and then back to the 4344 * main loop which can handle possible input. 4345 */ 4346 if (++cnt >= SQ_CHUNK_SIZE) { 4347 if (!f->f_sq_event) { /* alloc on demand */ 4348 f->f_sq_event = allocev(); 4349 event_set(f->f_sq_event, 0, 0, send_queue, f); 4350 } 4351 if (event_add(f->f_sq_event, &((struct timeval){0, 1})) == -1) { 4352 DPRINTF(D_EVENT, "Failure in event_add()\n"); 4353 } 4354 break; 4355 } 4356 } 4357 #ifndef DISABLE_TLS 4358 if (f->f_type == F_TLS) 4359 f->f_un.f_tls.tls_conn->send_queue = false; 4360 #endif 4361 4362 } 4363 4364 /* 4365 * finds the next queue element to delete 4366 * 4367 * has stateful behaviour, before using it call once with reset = true 4368 * after that every call will return one next queue elemen to delete, 4369 * depending on strategy either the oldest or the one with the lowest priority 4370 */ 4371 static struct buf_queue * 4372 find_qentry_to_delete(const struct buf_queue_head *head, int strategy, 4373 bool reset) 4374 { 4375 static int pri; 4376 static struct buf_queue *qentry_static; 4377 4378 struct buf_queue *qentry_tmp; 4379 4380 if (reset || STAILQ_EMPTY(head)) { 4381 pri = LOG_DEBUG; 4382 qentry_static = STAILQ_FIRST(head); 4383 return NULL; 4384 } 4385 4386 /* find elements to delete */ 4387 if (strategy == PURGE_BY_PRIORITY) { 4388 qentry_tmp = qentry_static; 4389 if (!qentry_tmp) return NULL; 4390 while ((qentry_tmp = STAILQ_NEXT(qentry_tmp, entries)) != NULL) 4391 { 4392 if (LOG_PRI(qentry_tmp->msg->pri) == pri) { 4393 /* save the successor, because qentry_tmp 4394 * is probably deleted by the caller */ 4395 qentry_static = STAILQ_NEXT(qentry_tmp, entries); 4396 return qentry_tmp; 4397 } 4398 } 4399 /* nothing found in while loop --> next pri */ 4400 if (--pri) 4401 return find_qentry_to_delete(head, strategy, false); 4402 else 4403 return NULL; 4404 } else /* strategy == PURGE_OLDEST or other value */ { 4405 qentry_tmp = qentry_static; 4406 qentry_static = STAILQ_NEXT(qentry_tmp, entries); 4407 return qentry_tmp; /* is NULL on empty queue */ 4408 } 4409 } 4410 4411 /* note on TAILQ: newest message added at TAIL, 4412 * oldest to be removed is FIRST 4413 */ 4414 /* 4415 * checks length of a destination's message queue 4416 * if del_entries == 0 then assert queue length is 4417 * less or equal to configured number of queue elements 4418 * otherwise del_entries tells how many entries to delete 4419 * 4420 * returns the number of removed queue elements 4421 * (which not necessarily means free'd messages) 4422 * 4423 * strategy PURGE_OLDEST to delete oldest entry, e.g. after it was resent 4424 * strategy PURGE_BY_PRIORITY to delete messages with lowest priority first, 4425 * this is much slower but might be desirable when unsent messages have 4426 * to be deleted, e.g. in call from domark() 4427 */ 4428 size_t 4429 message_queue_purge(struct filed *f, size_t del_entries, int strategy) 4430 { 4431 size_t removed = 0; 4432 struct buf_queue *qentry = NULL; 4433 4434 DPRINTF((D_CALL|D_BUFFER), "purge_message_queue(%p, %zu, %d) with " 4435 "f_qelements=%zu and f_qsize=%zu\n", 4436 f, del_entries, strategy, 4437 f->f_qelements, f->f_qsize); 4438 4439 /* reset state */ 4440 (void)find_qentry_to_delete(&f->f_qhead, strategy, true); 4441 4442 while (removed < del_entries 4443 || (TypeInfo[f->f_type].queue_length != -1 4444 && (size_t)TypeInfo[f->f_type].queue_length <= f->f_qelements) 4445 || (TypeInfo[f->f_type].queue_size != -1 4446 && (size_t)TypeInfo[f->f_type].queue_size <= f->f_qsize)) { 4447 qentry = find_qentry_to_delete(&f->f_qhead, strategy, 0); 4448 if (message_queue_remove(f, qentry)) 4449 removed++; 4450 else 4451 break; 4452 } 4453 return removed; 4454 } 4455 4456 /* run message_queue_purge() for all destinations to free memory */ 4457 size_t 4458 message_allqueues_purge(void) 4459 { 4460 size_t sum = 0; 4461 struct filed *f; 4462 4463 for (f = Files; f; f = f->f_next) 4464 sum += message_queue_purge(f, 4465 f->f_qelements/10, PURGE_BY_PRIORITY); 4466 4467 DPRINTF(D_BUFFER, 4468 "message_allqueues_purge(): removed %zu buffer entries\n", sum); 4469 return sum; 4470 } 4471 4472 /* run message_queue_purge() for all destinations to check limits */ 4473 size_t 4474 message_allqueues_check(void) 4475 { 4476 size_t sum = 0; 4477 struct filed *f; 4478 4479 for (f = Files; f; f = f->f_next) 4480 sum += message_queue_purge(f, 0, PURGE_BY_PRIORITY); 4481 DPRINTF(D_BUFFER, 4482 "message_allqueues_check(): removed %zu buffer entries\n", sum); 4483 return sum; 4484 } 4485 4486 struct buf_msg * 4487 buf_msg_new(const size_t len) 4488 { 4489 struct buf_msg *newbuf; 4490 4491 CALLOC(newbuf, sizeof(*newbuf)); 4492 4493 if (len) { /* len = 0 is valid */ 4494 MALLOC(newbuf->msg, len); 4495 newbuf->msgorig = newbuf->msg; 4496 newbuf->msgsize = len; 4497 } 4498 return NEWREF(newbuf); 4499 } 4500 4501 void 4502 buf_msg_free(struct buf_msg *buf) 4503 { 4504 if (!buf) 4505 return; 4506 4507 buf->refcount--; 4508 if (buf->refcount == 0) { 4509 FREEPTR(buf->timestamp); 4510 /* small optimizations: the host/recvhost may point to the 4511 * global HostName/FQDN. of course this must not be free()d 4512 * same goes for appname and include_pid 4513 */ 4514 if (buf->recvhost != buf->host 4515 && buf->recvhost != LocalHostName 4516 && buf->recvhost != LocalFQDN 4517 && buf->recvhost != oldLocalFQDN) 4518 FREEPTR(buf->recvhost); 4519 if (buf->host != LocalHostName 4520 && buf->host != LocalFQDN 4521 && buf->host != oldLocalFQDN) 4522 FREEPTR(buf->host); 4523 if (buf->prog != appname) 4524 FREEPTR(buf->prog); 4525 if (buf->pid != include_pid) 4526 FREEPTR(buf->pid); 4527 FREEPTR(buf->msgid); 4528 FREEPTR(buf->sd); 4529 FREEPTR(buf->msgorig); /* instead of msg */ 4530 FREEPTR(buf); 4531 } 4532 } 4533 4534 size_t 4535 buf_queue_obj_size(struct buf_queue *qentry) 4536 { 4537 size_t sum = 0; 4538 4539 if (!qentry) 4540 return 0; 4541 sum += sizeof(*qentry) 4542 + sizeof(*qentry->msg) 4543 + qentry->msg->msgsize 4544 + SAFEstrlen(qentry->msg->timestamp)+1 4545 + SAFEstrlen(qentry->msg->msgid)+1; 4546 if (qentry->msg->prog 4547 && qentry->msg->prog != include_pid) 4548 sum += strlen(qentry->msg->prog)+1; 4549 if (qentry->msg->pid 4550 && qentry->msg->pid != appname) 4551 sum += strlen(qentry->msg->pid)+1; 4552 if (qentry->msg->recvhost 4553 && qentry->msg->recvhost != LocalHostName 4554 && qentry->msg->recvhost != LocalFQDN 4555 && qentry->msg->recvhost != oldLocalFQDN) 4556 sum += strlen(qentry->msg->recvhost)+1; 4557 if (qentry->msg->host 4558 && qentry->msg->host != LocalHostName 4559 && qentry->msg->host != LocalFQDN 4560 && qentry->msg->host != oldLocalFQDN) 4561 sum += strlen(qentry->msg->host)+1; 4562 4563 return sum; 4564 } 4565 4566 bool 4567 message_queue_remove(struct filed *f, struct buf_queue *qentry) 4568 { 4569 if (!f || !qentry || !qentry->msg) 4570 return false; 4571 4572 assert(!STAILQ_EMPTY(&f->f_qhead)); 4573 STAILQ_REMOVE(&f->f_qhead, qentry, buf_queue, entries); 4574 f->f_qelements--; 4575 f->f_qsize -= buf_queue_obj_size(qentry); 4576 4577 DPRINTF(D_BUFFER, "msg @%p removed from queue @%p, new qlen = %zu\n", 4578 qentry->msg, f, f->f_qelements); 4579 DELREF(qentry->msg); 4580 FREEPTR(qentry); 4581 return true; 4582 } 4583 4584 /* 4585 * returns *qentry on success and NULL on error 4586 */ 4587 struct buf_queue * 4588 message_queue_add(struct filed *f, struct buf_msg *buffer) 4589 { 4590 struct buf_queue *qentry; 4591 4592 /* check on every call or only every n-th time? */ 4593 message_queue_purge(f, 0, PURGE_BY_PRIORITY); 4594 4595 while (!(qentry = malloc(sizeof(*qentry))) 4596 && message_queue_purge(f, 1, PURGE_OLDEST)) 4597 continue; 4598 if (!qentry) { 4599 logerror("Unable to allocate memory"); 4600 DPRINTF(D_BUFFER, "queue empty, no memory, msg dropped\n"); 4601 return NULL; 4602 } else { 4603 qentry->msg = buffer; 4604 f->f_qelements++; 4605 f->f_qsize += buf_queue_obj_size(qentry); 4606 STAILQ_INSERT_TAIL(&f->f_qhead, qentry, entries); 4607 4608 DPRINTF(D_BUFFER, "msg @%p queued @%p, qlen = %zu\n", 4609 buffer, f, f->f_qelements); 4610 return qentry; 4611 } 4612 } 4613 4614 void 4615 message_queue_freeall(struct filed *f) 4616 { 4617 struct buf_queue *qentry; 4618 4619 if (!f) return; 4620 DPRINTF(D_MEM, "message_queue_freeall(f@%p) with f_qhead@%p\n", f, 4621 &f->f_qhead); 4622 4623 while (!STAILQ_EMPTY(&f->f_qhead)) { 4624 qentry = STAILQ_FIRST(&f->f_qhead); 4625 STAILQ_REMOVE(&f->f_qhead, qentry, buf_queue, entries); 4626 DELREF(qentry->msg); 4627 FREEPTR(qentry); 4628 } 4629 4630 f->f_qelements = 0; 4631 f->f_qsize = 0; 4632 } 4633 4634 #ifndef DISABLE_TLS 4635 /* utility function for tls_reconnect() */ 4636 struct filed * 4637 get_f_by_conninfo(struct tls_conn_settings *conn_info) 4638 { 4639 struct filed *f; 4640 4641 for (f = Files; f; f = f->f_next) { 4642 if ((f->f_type == F_TLS) && f->f_un.f_tls.tls_conn == conn_info) 4643 return f; 4644 } 4645 DPRINTF(D_TLS, "get_f_by_conninfo() called on invalid conn_info\n"); 4646 return NULL; 4647 } 4648 4649 /* 4650 * Called on signal. 4651 * Lets the admin reconnect without waiting for the reconnect timer expires. 4652 */ 4653 /*ARGSUSED*/ 4654 void 4655 dispatch_force_tls_reconnect(int fd, short event, void *ev) 4656 { 4657 struct filed *f; 4658 DPRINTF((D_TLS|D_CALL|D_EVENT), "dispatch_force_tls_reconnect()\n"); 4659 for (f = Files; f; f = f->f_next) { 4660 if (f->f_type == F_TLS && 4661 f->f_un.f_tls.tls_conn->state == ST_NONE) 4662 tls_reconnect(fd, event, f->f_un.f_tls.tls_conn); 4663 } 4664 } 4665 #endif /* !DISABLE_TLS */ 4666 4667 /* 4668 * return a timestamp in a static buffer, 4669 * either format the timestamp given by parameter in_now 4670 * or use the current time if in_now is NULL. 4671 */ 4672 char * 4673 make_timestamp(time_t *in_now, bool iso) 4674 { 4675 int frac_digits = 6; 4676 struct timeval tv; 4677 time_t mytime; 4678 struct tm ltime; 4679 int len = 0; 4680 int tzlen = 0; 4681 /* uses global var: time_t now; */ 4682 4683 if (in_now) { 4684 mytime = *in_now; 4685 } else { 4686 gettimeofday(&tv, NULL); 4687 mytime = now = (time_t) tv.tv_sec; 4688 } 4689 4690 if (!iso) { 4691 strlcpy(timestamp, ctime(&mytime) + 4, TIMESTAMPBUFSIZE); 4692 timestamp[BSD_TIMESTAMPLEN] = '\0'; 4693 return timestamp; 4694 } 4695 4696 localtime_r(&mytime, <ime); 4697 len += strftime(timestamp, TIMESTAMPBUFSIZE, "%FT%T", <ime); 4698 snprintf(&(timestamp[len]), frac_digits+2, ".%.*ld", 4699 frac_digits, (long)tv.tv_usec); 4700 len += frac_digits+1; 4701 tzlen = strftime(&(timestamp[len]), TIMESTAMPBUFSIZE-len, "%z", <ime); 4702 len += tzlen; 4703 4704 if (tzlen == 5) { 4705 /* strftime gives "+0200", but we need "+02:00" */ 4706 timestamp[len+1] = timestamp[len]; 4707 timestamp[len] = timestamp[len-1]; 4708 timestamp[len-1] = timestamp[len-2]; 4709 timestamp[len-2] = ':'; 4710 } 4711 return timestamp; 4712 } 4713 4714 /* auxillary code to allocate memory and copy a string */ 4715 bool 4716 copy_string(char **mem, const char *p, const char *q) 4717 { 4718 const size_t len = 1 + q - p; 4719 if (!(*mem = malloc(len))) { 4720 logerror("Unable to allocate memory for config"); 4721 return false; 4722 } 4723 strlcpy(*mem, p, len); 4724 return true; 4725 } 4726 4727 /* keyword has to end with ", everything until next " is copied */ 4728 bool 4729 copy_config_value_quoted(const char *keyword, char **mem, const char **p) 4730 { 4731 const char *q; 4732 if (strncasecmp(*p, keyword, strlen(keyword))) 4733 return false; 4734 q = *p += strlen(keyword); 4735 if (!(q = strchr(*p, '"'))) { 4736 errno = 0; 4737 logerror("unterminated \"\n"); 4738 return false; 4739 } 4740 if (!(copy_string(mem, *p, q))) 4741 return false; 4742 *p = ++q; 4743 return true; 4744 } 4745 4746 /* for config file: 4747 * following = required but whitespace allowed, quotes optional 4748 * if numeric, then conversion to integer and no memory allocation 4749 */ 4750 bool 4751 copy_config_value(const char *keyword, char **mem, 4752 const char **p, const char *file, int line) 4753 { 4754 if (strncasecmp(*p, keyword, strlen(keyword))) 4755 return false; 4756 *p += strlen(keyword); 4757 4758 while (isspace((unsigned char)**p)) 4759 *p += 1; 4760 if (**p != '=') { 4761 errno = 0; 4762 logerror("expected \"=\" in file %s, line %d", file, line); 4763 return false; 4764 } 4765 *p += 1; 4766 4767 return copy_config_value_word(mem, p); 4768 } 4769 4770 /* copy next parameter from a config line */ 4771 bool 4772 copy_config_value_word(char **mem, const char **p) 4773 { 4774 const char *q; 4775 while (isspace((unsigned char)**p)) 4776 *p += 1; 4777 if (**p == '"') 4778 return copy_config_value_quoted("\"", mem, p); 4779 4780 /* without quotes: find next whitespace or end of line */ 4781 (void)((q = strchr(*p, ' ')) || (q = strchr(*p, '\t')) 4782 || (q = strchr(*p, '\n')) || (q = strchr(*p, '\0'))); 4783 4784 if (q-*p == 0 || !(copy_string(mem, *p, q))) 4785 return false; 4786 4787 *p = ++q; 4788 return true; 4789 } 4790 4791 static int 4792 writev1(int fd, struct iovec *iov, size_t count) 4793 { 4794 ssize_t nw = 0, tot = 0; 4795 size_t ntries = 5; 4796 4797 if (count == 0) 4798 return 0; 4799 while (ntries--) { 4800 switch ((nw = writev(fd, iov, count))) { 4801 case -1: 4802 if (errno == EAGAIN || errno == EWOULDBLOCK) { 4803 struct pollfd pfd; 4804 pfd.fd = fd; 4805 pfd.events = POLLOUT; 4806 pfd.revents = 0; 4807 (void)poll(&pfd, 1, 500); 4808 continue; 4809 } 4810 return -1; 4811 case 0: 4812 return 0; 4813 default: 4814 tot += nw; 4815 while (nw > 0) { 4816 if (iov->iov_len > (size_t)nw) { 4817 iov->iov_len -= nw; 4818 iov->iov_base = 4819 (char *)iov->iov_base + nw; 4820 break; 4821 } else { 4822 if (--count == 0) 4823 return tot; 4824 nw -= iov->iov_len; 4825 iov++; 4826 } 4827 } 4828 } 4829 } 4830 return tot == 0 ? nw : tot; 4831 } 4832