| File: | src/usr.sbin/syslogd/syslogd.c |
| Warning: | line 2210, column 4 Value stored to 'l' is never read |
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| 1 | /* $OpenBSD: syslogd.c,v 1.272 2021/11/10 21:59:47 bluhm Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2014-2021 Alexander Bluhm <bluhm@genua.de> |
| 5 | * |
| 6 | * Permission to use, copy, modify, and distribute this software for any |
| 7 | * purpose with or without fee is hereby granted, provided that the above |
| 8 | * copyright notice and this permission notice appear in all copies. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | /* |
| 20 | * Copyright (c) 1983, 1988, 1993, 1994 |
| 21 | * The Regents of the University of California. All rights reserved. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * 1. Redistributions of source code must retain the above copyright |
| 27 | * notice, this list of conditions and the following disclaimer. |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer in the |
| 30 | * documentation and/or other materials provided with the distribution. |
| 31 | * 3. Neither the name of the University nor the names of its contributors |
| 32 | * may be used to endorse or promote products derived from this software |
| 33 | * without specific prior written permission. |
| 34 | * |
| 35 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 36 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 37 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 38 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 39 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 40 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 41 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 42 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 43 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 44 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 45 | * SUCH DAMAGE. |
| 46 | */ |
| 47 | |
| 48 | /* |
| 49 | * syslogd -- log system messages |
| 50 | * |
| 51 | * This program implements a system log. It takes a series of lines. |
| 52 | * Each line may have a priority, signified as "<n>" as |
| 53 | * the first characters of the line. If this is |
| 54 | * not present, a default priority is used. |
| 55 | * |
| 56 | * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will |
| 57 | * cause it to reread its configuration file. |
| 58 | * |
| 59 | * Defined Constants: |
| 60 | * |
| 61 | * MAXLINE -- the maximum line length that can be handled. |
| 62 | * DEFUPRI -- the default priority for user messages |
| 63 | * DEFSPRI -- the default priority for kernel messages |
| 64 | * |
| 65 | * Author: Eric Allman |
| 66 | * extensive changes by Ralph Campbell |
| 67 | * more extensive changes by Eric Allman (again) |
| 68 | * memory buffer logging by Damien Miller |
| 69 | * IPv6, libevent, syslog over TCP and TLS by Alexander Bluhm |
| 70 | */ |
| 71 | |
| 72 | #define MAX_UDPMSG1180 1180 /* maximum UDP send size */ |
| 73 | #define MIN_MEMBUF(8192 * 4) (LOG_MAXLINE8192 * 4) /* Minimum memory buffer size */ |
| 74 | #define MAX_MEMBUF(256 * 1024) (256 * 1024) /* Maximum memory buffer size */ |
| 75 | #define MAX_MEMBUF_NAME64 64 /* Max length of membuf log name */ |
| 76 | #define MAX_TCPBUF(256 * 1024) (256 * 1024) /* Maximum tcp event buffer size */ |
| 77 | #define MAXSVLINE120 120 /* maximum saved line length */ |
| 78 | #define FD_RESERVE5 5 /* file descriptors not accepted */ |
| 79 | #define DEFUPRI((1<<3)|5) (LOG_USER(1<<3)|LOG_NOTICE5) |
| 80 | #define DEFSPRI((0<<3)|2) (LOG_KERN(0<<3)|LOG_CRIT2) |
| 81 | #define TIMERINTVL30 30 /* interval for checking flush, mark */ |
| 82 | |
| 83 | #include <sys/ioctl.h> |
| 84 | #include <sys/stat.h> |
| 85 | #include <sys/msgbuf.h> |
| 86 | #include <sys/queue.h> |
| 87 | #include <sys/sysctl.h> |
| 88 | #include <sys/un.h> |
| 89 | #include <sys/time.h> |
| 90 | #include <sys/resource.h> |
| 91 | |
| 92 | #include <netinet/in.h> |
| 93 | #include <netdb.h> |
| 94 | #include <arpa/inet.h> |
| 95 | |
| 96 | #include <ctype.h> |
| 97 | #include <err.h> |
| 98 | #include <errno(*__errno()).h> |
| 99 | #include <event.h> |
| 100 | #include <fcntl.h> |
| 101 | #include <fnmatch.h> |
| 102 | #include <limits.h> |
| 103 | #include <paths.h> |
| 104 | #include <signal.h> |
| 105 | #include <stdio.h> |
| 106 | #include <stdlib.h> |
| 107 | #include <string.h> |
| 108 | #include <tls.h> |
| 109 | #include <unistd.h> |
| 110 | #include <utmp.h> |
| 111 | #include <vis.h> |
| 112 | |
| 113 | #define MAXIMUM(a, b)(((a) > (b)) ? (a) : (b)) (((a) > (b)) ? (a) : (b)) |
| 114 | #define MINIMUM(a, b)(((a) < (b)) ? (a) : (b)) (((a) < (b)) ? (a) : (b)) |
| 115 | |
| 116 | #define SYSLOG_NAMES |
| 117 | #include <sys/syslog.h> |
| 118 | |
| 119 | #include "log.h" |
| 120 | #include "syslogd.h" |
| 121 | #include "evbuffer_tls.h" |
| 122 | |
| 123 | char *ConfFile = _PATH_LOGCONF"/etc/syslog.conf"; |
| 124 | const char ctty[] = _PATH_CONSOLE"/dev/console"; |
| 125 | |
| 126 | #define MAXUNAMES20 20 /* maximum number of user names */ |
| 127 | |
| 128 | |
| 129 | /* |
| 130 | * Flags to logline(). |
| 131 | */ |
| 132 | |
| 133 | #define IGN_CONS0x001 0x001 /* don't print on console */ |
| 134 | #define SYNC_FILE0x002 0x002 /* do fsync on file after printing */ |
| 135 | #define ADDDATE0x004 0x004 /* add a date to the message */ |
| 136 | #define MARK0x008 0x008 /* this message is a mark */ |
| 137 | |
| 138 | /* |
| 139 | * This structure represents the files that will have log |
| 140 | * copies printed. |
| 141 | */ |
| 142 | |
| 143 | struct filed { |
| 144 | SIMPLEQ_ENTRY(filed)struct { struct filed *sqe_next; } f_next; /* next in linked list */ |
| 145 | int f_type; /* entry type, see below */ |
| 146 | int f_file; /* file descriptor */ |
| 147 | time_t f_time; /* time this was last written */ |
| 148 | u_char f_pmask[LOG_NFACILITIES24+1]; /* priority mask */ |
| 149 | char *f_program; /* program this applies to */ |
| 150 | char *f_hostname; /* host this applies to */ |
| 151 | union { |
| 152 | char f_uname[MAXUNAMES20][UT_NAMESIZE32+1]; |
| 153 | struct { |
| 154 | char f_loghost[1+4+3+1+NI_MAXHOST256+1+NI_MAXSERV32]; |
| 155 | /* @proto46://[hostname]:servname\0 */ |
| 156 | struct sockaddr_storage f_addr; |
| 157 | struct buffertls f_buftls; |
| 158 | struct bufferevent *f_bufev; |
| 159 | struct tls *f_ctx; |
| 160 | char *f_host; |
| 161 | int f_reconnectwait; |
| 162 | } f_forw; /* forwarding address */ |
| 163 | char f_fname[PATH_MAX1024]; |
| 164 | struct { |
| 165 | char f_mname[MAX_MEMBUF_NAME64]; |
| 166 | struct ringbuf *f_rb; |
| 167 | int f_overflow; |
| 168 | int f_attached; |
| 169 | size_t f_len; |
| 170 | } f_mb; /* Memory buffer */ |
| 171 | } f_un; |
| 172 | char f_prevline[MAXSVLINE120]; /* last message logged */ |
| 173 | char f_lasttime[33]; /* time of last occurrence */ |
| 174 | char f_prevhost[HOST_NAME_MAX255+1]; /* host from which recd. */ |
| 175 | int f_prevpri; /* pri of f_prevline */ |
| 176 | int f_prevlen; /* length of f_prevline */ |
| 177 | int f_prevcount; /* repetition cnt of prevline */ |
| 178 | unsigned int f_repeatcount; /* number of "repeated" msgs */ |
| 179 | int f_quick; /* abort when matched */ |
| 180 | int f_dropped; /* warn, dropped message */ |
| 181 | time_t f_lasterrtime; /* last error was reported */ |
| 182 | }; |
| 183 | |
| 184 | /* |
| 185 | * Intervals at which we flush out "message repeated" messages, |
| 186 | * in seconds after previous message is logged. After each flush, |
| 187 | * we move to the next interval until we reach the largest. |
| 188 | */ |
| 189 | int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ |
| 190 | #define MAXREPEAT((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) |
| 191 | #define REPEATTIME(f)((f)->f_time + repeatinterval[(f)->f_repeatcount]) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) |
| 192 | #define BACKOFF(f){ if (++(f)->f_repeatcount > ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)) (f)->f_repeatcount = ((sizeof (repeatinterval) / sizeof(repeatinterval[0])) - 1); } { if (++(f)->f_repeatcount > MAXREPEAT((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)) \ |
| 193 | (f)->f_repeatcount = MAXREPEAT((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1); \ |
| 194 | } |
| 195 | |
| 196 | /* values for f_type */ |
| 197 | #define F_UNUSED0 0 /* unused entry */ |
| 198 | #define F_FILE1 1 /* regular file */ |
| 199 | #define F_TTY2 2 /* terminal */ |
| 200 | #define F_CONSOLE3 3 /* console terminal */ |
| 201 | #define F_FORWUDP4 4 /* remote machine via UDP */ |
| 202 | #define F_USERS5 5 /* list of users */ |
| 203 | #define F_WALL6 6 /* everyone logged on */ |
| 204 | #define F_MEMBUF7 7 /* memory buffer */ |
| 205 | #define F_PIPE8 8 /* pipe to external program */ |
| 206 | #define F_FORWTCP9 9 /* remote machine via TCP */ |
| 207 | #define F_FORWTLS10 10 /* remote machine via TLS */ |
| 208 | |
| 209 | char *TypeNames[] = { |
| 210 | "UNUSED", "FILE", "TTY", "CONSOLE", |
| 211 | "FORWUDP", "USERS", "WALL", "MEMBUF", |
| 212 | "PIPE", "FORWTCP", "FORWTLS", |
| 213 | }; |
| 214 | |
| 215 | SIMPLEQ_HEAD(filed_list, filed)struct filed_list { struct filed *sqh_first; struct filed **sqh_last ; } Files; |
| 216 | struct filed consfile; |
| 217 | |
| 218 | int Debug; /* debug flag */ |
| 219 | int Foreground; /* run in foreground, instead of daemonizing */ |
| 220 | char LocalHostName[HOST_NAME_MAX255+1]; /* our hostname */ |
| 221 | int Started = 0; /* set after privsep */ |
| 222 | int Initialized = 0; /* set when we have initialized ourselves */ |
| 223 | |
| 224 | int MarkInterval = 20 * 60; /* interval between marks in seconds */ |
| 225 | int MarkSeq = 0; /* mark sequence number */ |
| 226 | int PrivChild = 0; /* Exec the privileged parent process */ |
| 227 | int Repeat = 0; /* 0 msg repeated, 1 in files only, 2 never */ |
| 228 | int SecureMode = 1; /* when true, speak only unix domain socks */ |
| 229 | int NoDNS = 0; /* when true, refrain from doing DNS lookups */ |
| 230 | int ZuluTime = 0; /* display date and time in UTC ISO format */ |
| 231 | int IncludeHostname = 0; /* include RFC 3164 hostnames when forwarding */ |
| 232 | int Family = PF_UNSPEC0; /* protocol family, may disable IPv4 or IPv6 */ |
| 233 | |
| 234 | struct tls *server_ctx; |
| 235 | struct tls_config *client_config, *server_config; |
| 236 | const char *CAfile = "/etc/ssl/cert.pem"; /* file containing CA certificates */ |
| 237 | int NoVerify = 0; /* do not verify TLS server x509 certificate */ |
| 238 | const char *ClientCertfile = NULL((void*)0); |
| 239 | const char *ClientKeyfile = NULL((void*)0); |
| 240 | const char *ServerCAfile = NULL((void*)0); |
| 241 | int tcpbuf_dropped = 0; /* count messages dropped from TCP or TLS */ |
| 242 | int file_dropped = 0; /* messages dropped due to file system full */ |
| 243 | int init_dropped = 0; /* messages dropped during initialization */ |
| 244 | |
| 245 | #define CTL_READING_CMD1 1 |
| 246 | #define CTL_WRITING_REPLY2 2 |
| 247 | #define CTL_WRITING_CONT_REPLY3 3 |
| 248 | int ctl_state = 0; /* What the control socket is up to */ |
| 249 | int membuf_drop = 0; /* logs dropped in continuous membuf read */ |
| 250 | |
| 251 | /* |
| 252 | * Client protocol NB. all numeric fields in network byte order |
| 253 | */ |
| 254 | #define CTL_VERSION2 2 |
| 255 | |
| 256 | /* Request */ |
| 257 | struct { |
| 258 | u_int32_t version; |
| 259 | #define CMD_READ1 1 /* Read out log */ |
| 260 | #define CMD_READ_CLEAR2 2 /* Read and clear log */ |
| 261 | #define CMD_CLEAR3 3 /* Clear log */ |
| 262 | #define CMD_LIST4 4 /* List available logs */ |
| 263 | #define CMD_FLAGS5 5 /* Query flags only */ |
| 264 | #define CMD_READ_CONT6 6 /* Read out log continuously */ |
| 265 | u_int32_t cmd; |
| 266 | u_int32_t lines; |
| 267 | char logname[MAX_MEMBUF_NAME64]; |
| 268 | } ctl_cmd; |
| 269 | |
| 270 | size_t ctl_cmd_bytes = 0; /* number of bytes of ctl_cmd read */ |
| 271 | |
| 272 | /* Reply */ |
| 273 | struct ctl_reply_hdr { |
| 274 | u_int32_t version; |
| 275 | #define CTL_HDR_FLAG_OVERFLOW0x01 0x01 |
| 276 | u_int32_t flags; |
| 277 | /* Reply text follows, up to MAX_MEMBUF long */ |
| 278 | }; |
| 279 | |
| 280 | #define CTL_HDR_LEN(sizeof(struct ctl_reply_hdr)) (sizeof(struct ctl_reply_hdr)) |
| 281 | #define CTL_REPLY_MAXSIZE((sizeof(struct ctl_reply_hdr)) + (256 * 1024)) (CTL_HDR_LEN(sizeof(struct ctl_reply_hdr)) + MAX_MEMBUF(256 * 1024)) |
| 282 | #define CTL_REPLY_SIZE(strlen(reply_text) + (sizeof(struct ctl_reply_hdr))) (strlen(reply_text) + CTL_HDR_LEN(sizeof(struct ctl_reply_hdr))) |
| 283 | |
| 284 | char *ctl_reply = NULL((void*)0); /* Buffer for control connection reply */ |
| 285 | char *reply_text; /* Start of reply text in buffer */ |
| 286 | size_t ctl_reply_size = 0; /* Number of bytes used in reply */ |
| 287 | size_t ctl_reply_offset = 0; /* Number of bytes of reply written so far */ |
| 288 | |
| 289 | char *linebuf; |
| 290 | int linesize; |
| 291 | |
| 292 | int fd_ctlconn, fd_udp, fd_udp6, send_udp, send_udp6; |
| 293 | struct event *ev_ctlaccept, *ev_ctlread, *ev_ctlwrite; |
| 294 | |
| 295 | struct peer { |
| 296 | struct buffertls p_buftls; |
| 297 | struct bufferevent *p_bufev; |
| 298 | struct tls *p_ctx; |
| 299 | char *p_peername; |
| 300 | char *p_hostname; |
| 301 | int p_fd; |
| 302 | }; |
| 303 | char hostname_unknown[] = "???"; |
| 304 | |
| 305 | void klog_readcb(int, short, void *); |
| 306 | void udp_readcb(int, short, void *); |
| 307 | void unix_readcb(int, short, void *); |
| 308 | int reserve_accept4(int, int, struct event *, |
| 309 | void (*)(int, short, void *), struct sockaddr *, socklen_t *, int); |
| 310 | void tcp_acceptcb(int, short, void *); |
| 311 | void tls_acceptcb(int, short, void *); |
| 312 | void acceptcb(int, short, void *, int); |
| 313 | int octet_counting(struct evbuffer *, char **, int); |
| 314 | int non_transparent_framing(struct evbuffer *, char **); |
| 315 | void tcp_readcb(struct bufferevent *, void *); |
| 316 | void tcp_closecb(struct bufferevent *, short, void *); |
| 317 | int tcp_socket(struct filed *); |
| 318 | void tcp_dropcb(struct bufferevent *, void *); |
| 319 | void tcp_writecb(struct bufferevent *, void *); |
| 320 | void tcp_errorcb(struct bufferevent *, short, void *); |
| 321 | void tcp_connectcb(int, short, void *); |
| 322 | void tcp_connect_retry(struct bufferevent *, struct filed *); |
| 323 | int tcpbuf_countmsg(struct bufferevent *bufev); |
| 324 | void die_signalcb(int, short, void *); |
| 325 | void mark_timercb(int, short, void *); |
| 326 | void init_signalcb(int, short, void *); |
| 327 | void ctlsock_acceptcb(int, short, void *); |
| 328 | void ctlconn_readcb(int, short, void *); |
| 329 | void ctlconn_writecb(int, short, void *); |
| 330 | void ctlconn_logto(char *); |
| 331 | void ctlconn_cleanup(void); |
| 332 | |
| 333 | struct filed *cfline(char *, char *, char *); |
| 334 | void cvthname(struct sockaddr *, char *, size_t); |
| 335 | int decode(const char *, const CODE *); |
| 336 | void markit(void); |
| 337 | void fprintlog(struct filed *, int, char *); |
| 338 | void dropped_warn(int *, const char *); |
| 339 | void init(void); |
| 340 | void logevent(int, const char *); |
| 341 | void logline(int, int, char *, char *); |
| 342 | struct filed *find_dup(struct filed *); |
| 343 | size_t parsepriority(const char *, int *); |
| 344 | void printline(char *, char *); |
| 345 | void printsys(char *); |
| 346 | void usage(void); |
| 347 | void wallmsg(struct filed *, struct iovec *); |
| 348 | int loghost_parse(char *, char **, char **, char **); |
| 349 | int getmsgbufsize(void); |
| 350 | void address_alloc(const char *, const char *, char ***, char ***, int *); |
| 351 | int socket_bind(const char *, const char *, const char *, int, |
| 352 | int *, int *); |
| 353 | int unix_socket(char *, int, mode_t); |
| 354 | void double_sockbuf(int, int, int); |
| 355 | void set_sockbuf(int); |
| 356 | void set_keepalive(int); |
| 357 | void tailify_replytext(char *, int); |
| 358 | |
| 359 | int |
| 360 | main(int argc, char *argv[]) |
| 361 | { |
| 362 | struct timeval to; |
| 363 | struct event *ev_klog, *ev_sendsys, *ev_udp, *ev_udp6, |
| 364 | *ev_bind, *ev_listen, *ev_tls, *ev_unix, |
| 365 | *ev_hup, *ev_int, *ev_quit, *ev_term, *ev_mark; |
| 366 | sigset_t sigmask; |
| 367 | const char *errstr; |
| 368 | char *p; |
| 369 | int ch, i; |
| 370 | int lockpipe[2] = { -1, -1}, pair[2], nullfd, fd; |
| 371 | int fd_ctlsock, fd_klog, fd_sendsys, *fd_bind, *fd_listen; |
| 372 | int *fd_tls, *fd_unix, nunix, nbind, nlisten, ntls; |
| 373 | char **path_unix, *path_ctlsock; |
| 374 | char **bind_host, **bind_port, **listen_host, **listen_port; |
| 375 | char *tls_hostport, **tls_host, **tls_port; |
| 376 | |
| 377 | /* block signal until handler is set up */ |
| 378 | sigemptyset(&sigmask); |
| 379 | sigaddset(&sigmask, SIGHUP1); |
| 380 | if (sigprocmask(SIG_SETMASK3, &sigmask, NULL((void*)0)) == -1) |
| 381 | err(1, "sigprocmask block"); |
| 382 | |
| 383 | if ((path_unix = malloc(sizeof(*path_unix))) == NULL((void*)0)) |
| 384 | err(1, "malloc %s", _PATH_LOG"/dev/log"); |
| 385 | path_unix[0] = _PATH_LOG"/dev/log"; |
| 386 | nunix = 1; |
| 387 | path_ctlsock = NULL((void*)0); |
| 388 | |
| 389 | bind_host = listen_host = tls_host = NULL((void*)0); |
| 390 | bind_port = listen_port = tls_port = NULL((void*)0); |
| 391 | tls_hostport = NULL((void*)0); |
| 392 | nbind = nlisten = ntls = 0; |
| 393 | |
| 394 | while ((ch = getopt(argc, argv, |
| 395 | "46a:C:c:dFf:hK:k:m:nP:p:rS:s:T:U:uVZ")) != -1) { |
| 396 | switch (ch) { |
| 397 | case '4': /* disable IPv6 */ |
| 398 | Family = PF_INET2; |
| 399 | break; |
| 400 | case '6': /* disable IPv4 */ |
| 401 | Family = PF_INET624; |
| 402 | break; |
| 403 | case 'a': |
| 404 | if ((path_unix = reallocarray(path_unix, nunix + 1, |
| 405 | sizeof(*path_unix))) == NULL((void*)0)) |
| 406 | err(1, "unix path %s", optarg); |
| 407 | path_unix[nunix++] = optarg; |
| 408 | break; |
| 409 | case 'C': /* file containing CA certificates */ |
| 410 | CAfile = optarg; |
| 411 | break; |
| 412 | case 'c': /* file containing client certificate */ |
| 413 | ClientCertfile = optarg; |
| 414 | break; |
| 415 | case 'd': /* debug */ |
| 416 | Debug++; |
| 417 | break; |
| 418 | case 'F': /* foreground */ |
| 419 | Foreground = 1; |
| 420 | break; |
| 421 | case 'f': /* configuration file */ |
| 422 | ConfFile = optarg; |
| 423 | break; |
| 424 | case 'h': /* RFC 3164 hostnames */ |
| 425 | IncludeHostname = 1; |
| 426 | break; |
| 427 | case 'K': /* verify client with CA file */ |
| 428 | ServerCAfile = optarg; |
| 429 | break; |
| 430 | case 'k': /* file containing client key */ |
| 431 | ClientKeyfile = optarg; |
| 432 | break; |
| 433 | case 'm': /* mark interval */ |
| 434 | MarkInterval = strtonum(optarg, 0, 365*24*60, &errstr); |
| 435 | if (errstr) |
| 436 | errx(1, "mark_interval %s: %s", errstr, optarg); |
| 437 | MarkInterval *= 60; |
| 438 | break; |
| 439 | case 'n': /* don't do DNS lookups */ |
| 440 | NoDNS = 1; |
| 441 | break; |
| 442 | case 'P': /* used internally, exec the parent */ |
| 443 | PrivChild = strtonum(optarg, 2, INT_MAX2147483647, &errstr); |
| 444 | if (errstr) |
| 445 | errx(1, "priv child %s: %s", errstr, optarg); |
| 446 | break; |
| 447 | case 'p': /* path */ |
| 448 | path_unix[0] = optarg; |
| 449 | break; |
| 450 | case 'r': |
| 451 | Repeat++; |
| 452 | break; |
| 453 | case 'S': /* allow tls and listen on address */ |
| 454 | if (tls_hostport == NULL((void*)0)) |
| 455 | tls_hostport = optarg; |
| 456 | address_alloc("tls", optarg, &tls_host, &tls_port, |
| 457 | &ntls); |
| 458 | break; |
| 459 | case 's': |
| 460 | path_ctlsock = optarg; |
| 461 | break; |
| 462 | case 'T': /* allow tcp and listen on address */ |
| 463 | address_alloc("listen", optarg, &listen_host, |
| 464 | &listen_port, &nlisten); |
| 465 | break; |
| 466 | case 'U': /* allow udp only from address */ |
| 467 | address_alloc("bind", optarg, &bind_host, &bind_port, |
| 468 | &nbind); |
| 469 | break; |
| 470 | case 'u': /* allow udp input port */ |
| 471 | SecureMode = 0; |
| 472 | break; |
| 473 | case 'V': /* do not verify certificates */ |
| 474 | NoVerify = 1; |
| 475 | break; |
| 476 | case 'Z': /* time stamps in UTC ISO format */ |
| 477 | ZuluTime = 1; |
| 478 | break; |
| 479 | default: |
| 480 | usage(); |
| 481 | } |
| 482 | } |
| 483 | if (argc != optind) |
| 484 | usage(); |
| 485 | |
| 486 | log_init(Debug, LOG_SYSLOG(5<<3)); |
| 487 | log_procinit("syslogd"); |
| 488 | if (Debug) |
| 489 | setvbuf(stdout(&__sF[1]), NULL((void*)0), _IOLBF1, 0); |
| 490 | |
| 491 | if ((nullfd = open(_PATH_DEVNULL"/dev/null", O_RDWR0x0002)) == -1) |
| 492 | fatal("open %s", _PATH_DEVNULL"/dev/null"); |
| 493 | for (fd = nullfd + 1; fd <= STDERR_FILENO2; fd++) { |
| 494 | if (fcntl(fd, F_GETFL3) == -1 && errno(*__errno()) == EBADF9) |
| 495 | if (dup2(nullfd, fd) == -1) |
| 496 | fatal("dup2 null"); |
| 497 | } |
| 498 | |
| 499 | if (PrivChild > 1) |
| 500 | priv_exec(ConfFile, NoDNS, PrivChild, argc, argv); |
| 501 | |
| 502 | consfile.f_type = F_CONSOLE3; |
| 503 | (void)strlcpy(consfile.f_un.f_fname, ctty, |
| 504 | sizeof(consfile.f_un.f_fname)); |
| 505 | consfile.f_file = open(consfile.f_un.f_fname, O_WRONLY0x0001|O_NONBLOCK0x0004); |
| 506 | if (consfile.f_file == -1) |
| 507 | log_warn("open %s", consfile.f_un.f_fname); |
| 508 | |
| 509 | if (gethostname(LocalHostName, sizeof(LocalHostName)) == -1 || |
| 510 | LocalHostName[0] == '\0') |
| 511 | strlcpy(LocalHostName, "-", sizeof(LocalHostName)); |
| 512 | else if ((p = strchr(LocalHostName, '.')) != NULL((void*)0)) |
| 513 | *p = '\0'; |
| 514 | |
| 515 | /* Reserve space for kernel message buffer plus buffer full message. */ |
| 516 | linesize = getmsgbufsize() + 64; |
| 517 | if (linesize < LOG_MAXLINE8192) |
| 518 | linesize = LOG_MAXLINE8192; |
| 519 | linesize++; |
| 520 | if ((linebuf = malloc(linesize)) == NULL((void*)0)) |
| 521 | fatal("allocate line buffer"); |
| 522 | |
| 523 | if (socket_bind("udp", NULL((void*)0), "syslog", SecureMode, |
| 524 | &fd_udp, &fd_udp6) == -1) |
| 525 | log_warnx("socket bind * failed"); |
| 526 | if ((fd_bind = reallocarray(NULL((void*)0), nbind, sizeof(*fd_bind))) == NULL((void*)0)) |
| 527 | fatal("allocate bind fd"); |
| 528 | for (i = 0; i < nbind; i++) { |
| 529 | if (socket_bind("udp", bind_host[i], bind_port[i], 0, |
| 530 | &fd_bind[i], &fd_bind[i]) == -1) |
| 531 | log_warnx("socket bind udp failed"); |
| 532 | } |
| 533 | if ((fd_listen = reallocarray(NULL((void*)0), nlisten, sizeof(*fd_listen))) |
| 534 | == NULL((void*)0)) |
| 535 | fatal("allocate listen fd"); |
| 536 | for (i = 0; i < nlisten; i++) { |
| 537 | if (socket_bind("tcp", listen_host[i], listen_port[i], 0, |
| 538 | &fd_listen[i], &fd_listen[i]) == -1) |
| 539 | log_warnx("socket listen tcp failed"); |
| 540 | } |
| 541 | if ((fd_tls = reallocarray(NULL((void*)0), ntls, sizeof(*fd_tls))) == NULL((void*)0)) |
| 542 | fatal("allocate tls fd"); |
| 543 | for (i = 0; i < ntls; i++) { |
| 544 | if (socket_bind("tls", tls_host[i], tls_port[i], 0, |
| 545 | &fd_tls[i], &fd_tls[i]) == -1) |
| 546 | log_warnx("socket listen tls failed"); |
| 547 | } |
| 548 | |
| 549 | if ((fd_unix = reallocarray(NULL((void*)0), nunix, sizeof(*fd_unix))) == NULL((void*)0)) |
| 550 | fatal("allocate unix fd"); |
| 551 | for (i = 0; i < nunix; i++) { |
| 552 | fd_unix[i] = unix_socket(path_unix[i], SOCK_DGRAM2, 0666); |
| 553 | if (fd_unix[i] == -1) { |
| 554 | if (i == 0) |
| 555 | log_warnx("log socket %s failed", path_unix[i]); |
| 556 | continue; |
| 557 | } |
| 558 | double_sockbuf(fd_unix[i], SO_RCVBUF0x1002, 0); |
| 559 | } |
| 560 | |
| 561 | if (socketpair(AF_UNIX1, SOCK_DGRAM2, PF_UNSPEC0, pair) == -1) { |
| 562 | log_warn("socketpair sendsyslog"); |
| 563 | fd_sendsys = -1; |
| 564 | } else { |
| 565 | /* |
| 566 | * Avoid to lose messages from sendsyslog(2). A larger |
| 567 | * 1 MB socket buffer compensates bursts. |
| 568 | */ |
| 569 | double_sockbuf(pair[0], SO_RCVBUF0x1002, 1<<20); |
| 570 | double_sockbuf(pair[1], SO_SNDBUF0x1001, 1<<20); |
| 571 | fd_sendsys = pair[0]; |
| 572 | } |
| 573 | |
| 574 | fd_ctlsock = fd_ctlconn = -1; |
| 575 | if (path_ctlsock != NULL((void*)0)) { |
| 576 | fd_ctlsock = unix_socket(path_ctlsock, SOCK_STREAM1, 0600); |
| 577 | if (fd_ctlsock == -1) { |
| 578 | log_warnx("control socket %s failed", path_ctlsock); |
| 579 | } else { |
| 580 | if (listen(fd_ctlsock, 5) == -1) { |
| 581 | log_warn("listen control socket"); |
| 582 | close(fd_ctlsock); |
| 583 | fd_ctlsock = -1; |
| 584 | } |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | if ((fd_klog = open(_PATH_KLOG"/dev/klog", O_RDONLY0x0000)) == -1) { |
| 589 | log_warn("open %s", _PATH_KLOG"/dev/klog"); |
| 590 | } else if (fd_sendsys != -1) { |
| 591 | /* Use /dev/klog to register sendsyslog(2) receiver. */ |
| 592 | if (ioctl(fd_klog, LIOCSFD((unsigned long)0x80000000 | ((sizeof(int) & 0x1fff) << 16) | ((('l')) << 8) | ((127))), &pair[1]) == -1) |
| 593 | log_warn("ioctl klog LIOCSFD sendsyslog"); |
| 594 | } |
| 595 | if (fd_sendsys != -1) |
| 596 | close(pair[1]); |
| 597 | |
| 598 | if ((client_config = tls_config_new()) == NULL((void*)0)) |
| 599 | log_warn("tls_config_new client"); |
| 600 | if (tls_hostport) { |
| 601 | if ((server_config = tls_config_new()) == NULL((void*)0)) |
| 602 | log_warn("tls_config_new server"); |
| 603 | if ((server_ctx = tls_server()) == NULL((void*)0)) { |
| 604 | log_warn("tls_server"); |
| 605 | for (i = 0; i < ntls; i++) |
| 606 | close(fd_tls[i]); |
| 607 | free(fd_tls); |
| 608 | fd_tls = NULL((void*)0); |
| 609 | free(tls_host); |
| 610 | free(tls_port); |
| 611 | tls_host = tls_port = NULL((void*)0); |
| 612 | ntls = 0; |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | if (client_config) { |
| 617 | if (NoVerify) { |
| 618 | tls_config_insecure_noverifycert(client_config); |
| 619 | tls_config_insecure_noverifyname(client_config); |
| 620 | } else { |
| 621 | if (tls_config_set_ca_file(client_config, |
| 622 | CAfile) == -1) { |
| 623 | log_warnx("load client TLS CA: %s", |
| 624 | tls_config_error(client_config)); |
| 625 | /* avoid reading default certs in chroot */ |
| 626 | tls_config_set_ca_mem(client_config, "", 0); |
| 627 | } else |
| 628 | log_debug("CAfile %s", CAfile); |
| 629 | } |
| 630 | if (ClientCertfile && ClientKeyfile) { |
| 631 | if (tls_config_set_cert_file(client_config, |
| 632 | ClientCertfile) == -1) |
| 633 | log_warnx("load client TLS cert: %s", |
| 634 | tls_config_error(client_config)); |
| 635 | else |
| 636 | log_debug("ClientCertfile %s", ClientCertfile); |
| 637 | |
| 638 | if (tls_config_set_key_file(client_config, |
| 639 | ClientKeyfile) == -1) |
| 640 | log_warnx("load client TLS key: %s", |
| 641 | tls_config_error(client_config)); |
| 642 | else |
| 643 | log_debug("ClientKeyfile %s", ClientKeyfile); |
| 644 | } else if (ClientCertfile || ClientKeyfile) { |
| 645 | log_warnx("options -c and -k must be used together"); |
| 646 | } |
| 647 | if (tls_config_set_protocols(client_config, |
| 648 | TLS_PROTOCOLS_ALL((1 << 1)|(1 << 2)| (1 << 3)|(1 << 4) )) != 0) |
| 649 | log_warnx("set client TLS protocols: %s", |
| 650 | tls_config_error(client_config)); |
| 651 | if (tls_config_set_ciphers(client_config, "all") != 0) |
| 652 | log_warnx("set client TLS ciphers: %s", |
| 653 | tls_config_error(client_config)); |
| 654 | } |
| 655 | if (server_config && server_ctx) { |
| 656 | const char *names[2]; |
| 657 | |
| 658 | names[0] = tls_hostport; |
| 659 | names[1] = tls_host[0]; |
| 660 | |
| 661 | for (i = 0; i < 2; i++) { |
| 662 | if (asprintf(&p, "/etc/ssl/private/%s.key", names[i]) |
| 663 | == -1) |
| 664 | continue; |
| 665 | if (tls_config_set_key_file(server_config, p) == -1) { |
| 666 | log_warnx("load server TLS key: %s", |
| 667 | tls_config_error(server_config)); |
| 668 | free(p); |
| 669 | continue; |
| 670 | } |
| 671 | log_debug("Keyfile %s", p); |
| 672 | free(p); |
| 673 | if (asprintf(&p, "/etc/ssl/%s.crt", names[i]) == -1) |
| 674 | continue; |
| 675 | if (tls_config_set_cert_file(server_config, p) == -1) { |
| 676 | log_warnx("load server TLS cert: %s", |
| 677 | tls_config_error(server_config)); |
| 678 | free(p); |
| 679 | continue; |
| 680 | } |
| 681 | log_debug("Certfile %s", p); |
| 682 | free(p); |
| 683 | break; |
| 684 | } |
| 685 | |
| 686 | if (ServerCAfile) { |
| 687 | if (tls_config_set_ca_file(server_config, |
| 688 | ServerCAfile) == -1) { |
| 689 | log_warnx("load server TLS CA: %s", |
| 690 | tls_config_error(server_config)); |
| 691 | /* avoid reading default certs in chroot */ |
| 692 | tls_config_set_ca_mem(server_config, "", 0); |
| 693 | } else |
| 694 | log_debug("Server CAfile %s", ServerCAfile); |
| 695 | tls_config_verify_client(server_config); |
| 696 | } |
| 697 | if (tls_config_set_protocols(server_config, |
| 698 | TLS_PROTOCOLS_ALL((1 << 1)|(1 << 2)| (1 << 3)|(1 << 4) )) != 0) |
| 699 | log_warnx("set server TLS protocols: %s", |
| 700 | tls_config_error(server_config)); |
| 701 | if (tls_config_set_ciphers(server_config, "compat") != 0) |
| 702 | log_warnx("Set server TLS ciphers: %s", |
| 703 | tls_config_error(server_config)); |
| 704 | if (tls_configure(server_ctx, server_config) != 0) { |
| 705 | log_warnx("tls_configure server: %s", |
| 706 | tls_error(server_ctx)); |
| 707 | tls_free(server_ctx); |
| 708 | server_ctx = NULL((void*)0); |
| 709 | for (i = 0; i < ntls; i++) |
| 710 | close(fd_tls[i]); |
| 711 | free(fd_tls); |
| 712 | fd_tls = NULL((void*)0); |
| 713 | free(tls_host); |
| 714 | free(tls_port); |
| 715 | tls_host = tls_port = NULL((void*)0); |
| 716 | ntls = 0; |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | log_debug("off & running...."); |
| 721 | |
| 722 | if (!Debug && !Foreground) { |
| 723 | char c; |
| 724 | |
| 725 | pipe(lockpipe); |
| 726 | |
| 727 | switch(fork()) { |
| 728 | case -1: |
| 729 | err(1, "fork"); |
| 730 | case 0: |
| 731 | setsid(); |
| 732 | close(lockpipe[0]); |
| 733 | break; |
| 734 | default: |
| 735 | close(lockpipe[1]); |
| 736 | read(lockpipe[0], &c, 1); |
| 737 | _exit(0); |
| 738 | } |
| 739 | } |
| 740 | |
| 741 | /* tuck my process id away */ |
| 742 | if (!Debug) { |
| 743 | FILE *fp; |
| 744 | |
| 745 | fp = fopen(_PATH_LOGPID"/var/run/syslog.pid", "w"); |
| 746 | if (fp != NULL((void*)0)) { |
| 747 | fprintf(fp, "%ld\n", (long)getpid()); |
| 748 | (void) fclose(fp); |
| 749 | } |
| 750 | } |
| 751 | |
| 752 | /* Privilege separation begins here */ |
| 753 | priv_init(lockpipe[1], nullfd, argc, argv); |
| 754 | |
| 755 | if (pledge("stdio unix inet recvfd", NULL((void*)0)) == -1) |
| 756 | err(1, "pledge"); |
| 757 | |
| 758 | Started = 1; |
| 759 | |
| 760 | /* Process is now unprivileged and inside a chroot */ |
| 761 | if (Debug) |
| 762 | event_set_log_callback(logevent); |
| 763 | event_init(); |
| 764 | |
| 765 | if ((ev_ctlaccept = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 766 | (ev_ctlread = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 767 | (ev_ctlwrite = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 768 | (ev_klog = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 769 | (ev_sendsys = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 770 | (ev_udp = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 771 | (ev_udp6 = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 772 | (ev_bind = reallocarray(NULL((void*)0), nbind, sizeof(struct event))) |
| 773 | == NULL((void*)0) || |
| 774 | (ev_listen = reallocarray(NULL((void*)0), nlisten, sizeof(struct event))) |
| 775 | == NULL((void*)0) || |
| 776 | (ev_tls = reallocarray(NULL((void*)0), ntls, sizeof(struct event))) |
| 777 | == NULL((void*)0) || |
| 778 | (ev_unix = reallocarray(NULL((void*)0), nunix, sizeof(struct event))) |
| 779 | == NULL((void*)0) || |
| 780 | (ev_hup = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 781 | (ev_int = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 782 | (ev_quit = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 783 | (ev_term = malloc(sizeof(struct event))) == NULL((void*)0) || |
| 784 | (ev_mark = malloc(sizeof(struct event))) == NULL((void*)0)) |
| 785 | err(1, "malloc"); |
| 786 | |
| 787 | event_set(ev_ctlaccept, fd_ctlsock, EV_READ0x02|EV_PERSIST0x10, |
| 788 | ctlsock_acceptcb, ev_ctlaccept); |
| 789 | event_set(ev_ctlread, fd_ctlconn, EV_READ0x02|EV_PERSIST0x10, |
| 790 | ctlconn_readcb, ev_ctlread); |
| 791 | event_set(ev_ctlwrite, fd_ctlconn, EV_WRITE0x04|EV_PERSIST0x10, |
| 792 | ctlconn_writecb, ev_ctlwrite); |
| 793 | event_set(ev_klog, fd_klog, EV_READ0x02|EV_PERSIST0x10, klog_readcb, ev_klog); |
| 794 | event_set(ev_sendsys, fd_sendsys, EV_READ0x02|EV_PERSIST0x10, unix_readcb, |
| 795 | ev_sendsys); |
| 796 | event_set(ev_udp, fd_udp, EV_READ0x02|EV_PERSIST0x10, udp_readcb, ev_udp); |
| 797 | event_set(ev_udp6, fd_udp6, EV_READ0x02|EV_PERSIST0x10, udp_readcb, ev_udp6); |
| 798 | for (i = 0; i < nbind; i++) |
| 799 | event_set(&ev_bind[i], fd_bind[i], EV_READ0x02|EV_PERSIST0x10, |
| 800 | udp_readcb, &ev_bind[i]); |
| 801 | for (i = 0; i < nlisten; i++) |
| 802 | event_set(&ev_listen[i], fd_listen[i], EV_READ0x02|EV_PERSIST0x10, |
| 803 | tcp_acceptcb, &ev_listen[i]); |
| 804 | for (i = 0; i < ntls; i++) |
| 805 | event_set(&ev_tls[i], fd_tls[i], EV_READ0x02|EV_PERSIST0x10, |
| 806 | tls_acceptcb, &ev_tls[i]); |
| 807 | for (i = 0; i < nunix; i++) |
| 808 | event_set(&ev_unix[i], fd_unix[i], EV_READ0x02|EV_PERSIST0x10, |
| 809 | unix_readcb, &ev_unix[i]); |
| 810 | |
| 811 | signal_set(ev_hup, SIGHUP, init_signalcb, ev_hup)event_set(ev_hup, 1, 0x08|0x10, init_signalcb, ev_hup); |
| 812 | signal_set(ev_int, SIGINT, die_signalcb, ev_int)event_set(ev_int, 2, 0x08|0x10, die_signalcb, ev_int); |
| 813 | signal_set(ev_quit, SIGQUIT, die_signalcb, ev_quit)event_set(ev_quit, 3, 0x08|0x10, die_signalcb, ev_quit); |
| 814 | signal_set(ev_term, SIGTERM, die_signalcb, ev_term)event_set(ev_term, 15, 0x08|0x10, die_signalcb, ev_term); |
| 815 | |
| 816 | evtimer_set(ev_mark, mark_timercb, ev_mark)event_set(ev_mark, -1, 0, mark_timercb, ev_mark); |
| 817 | |
| 818 | init(); |
| 819 | |
| 820 | /* Allocate ctl socket reply buffer if we have a ctl socket */ |
| 821 | if (fd_ctlsock != -1 && |
| 822 | (ctl_reply = malloc(CTL_REPLY_MAXSIZE((sizeof(struct ctl_reply_hdr)) + (256 * 1024)))) == NULL((void*)0)) |
| 823 | fatal("allocate control socket reply buffer"); |
| 824 | reply_text = ctl_reply + CTL_HDR_LEN(sizeof(struct ctl_reply_hdr)); |
| 825 | |
| 826 | if (!Debug) { |
| 827 | close(lockpipe[1]); |
| 828 | dup2(nullfd, STDIN_FILENO0); |
| 829 | dup2(nullfd, STDOUT_FILENO1); |
| 830 | dup2(nullfd, STDERR_FILENO2); |
| 831 | } |
| 832 | if (nullfd > 2) |
| 833 | close(nullfd); |
| 834 | |
| 835 | /* |
| 836 | * Signal to the priv process that the initial config parsing is done |
| 837 | * so that it will reject any future attempts to open more files |
| 838 | */ |
| 839 | priv_config_parse_done(); |
| 840 | |
| 841 | if (fd_ctlsock != -1) |
| 842 | event_add(ev_ctlaccept, NULL((void*)0)); |
| 843 | if (fd_klog != -1) |
| 844 | event_add(ev_klog, NULL((void*)0)); |
| 845 | if (fd_sendsys != -1) |
| 846 | event_add(ev_sendsys, NULL((void*)0)); |
| 847 | if (!SecureMode) { |
| 848 | if (fd_udp != -1) |
| 849 | event_add(ev_udp, NULL((void*)0)); |
| 850 | if (fd_udp6 != -1) |
| 851 | event_add(ev_udp6, NULL((void*)0)); |
| 852 | } |
| 853 | for (i = 0; i < nbind; i++) |
| 854 | if (fd_bind[i] != -1) |
| 855 | event_add(&ev_bind[i], NULL((void*)0)); |
| 856 | for (i = 0; i < nlisten; i++) |
| 857 | if (fd_listen[i] != -1) |
| 858 | event_add(&ev_listen[i], NULL((void*)0)); |
| 859 | for (i = 0; i < ntls; i++) |
| 860 | if (fd_tls[i] != -1) |
| 861 | event_add(&ev_tls[i], NULL((void*)0)); |
| 862 | for (i = 0; i < nunix; i++) |
| 863 | if (fd_unix[i] != -1) |
| 864 | event_add(&ev_unix[i], NULL((void*)0)); |
| 865 | |
| 866 | signal_add(ev_hup, NULL)event_add(ev_hup, ((void*)0)); |
| 867 | signal_add(ev_term, NULL)event_add(ev_term, ((void*)0)); |
| 868 | if (Debug || Foreground) { |
| 869 | signal_add(ev_int, NULL)event_add(ev_int, ((void*)0)); |
| 870 | signal_add(ev_quit, NULL)event_add(ev_quit, ((void*)0)); |
| 871 | } else { |
| 872 | (void)signal(SIGINT2, SIG_IGN(void (*)(int))1); |
| 873 | (void)signal(SIGQUIT3, SIG_IGN(void (*)(int))1); |
| 874 | } |
| 875 | (void)signal(SIGCHLD20, SIG_IGN(void (*)(int))1); |
| 876 | (void)signal(SIGPIPE13, SIG_IGN(void (*)(int))1); |
| 877 | |
| 878 | to.tv_sec = TIMERINTVL30; |
| 879 | to.tv_usec = 0; |
| 880 | evtimer_add(ev_mark, &to)event_add(ev_mark, &to); |
| 881 | |
| 882 | log_info(LOG_INFO6, "start"); |
| 883 | log_debug("syslogd: started"); |
| 884 | |
| 885 | sigemptyset(&sigmask); |
| 886 | if (sigprocmask(SIG_SETMASK3, &sigmask, NULL((void*)0)) == -1) |
| 887 | err(1, "sigprocmask unblock"); |
| 888 | |
| 889 | /* Send message via libc, flushes log stash in kernel. */ |
| 890 | openlog("syslogd", LOG_PID0x01, LOG_SYSLOG(5<<3)); |
| 891 | syslog(LOG_DEBUG7, "running"); |
| 892 | |
| 893 | event_dispatch(); |
| 894 | /* NOTREACHED */ |
| 895 | return (0); |
| 896 | } |
| 897 | |
| 898 | void |
| 899 | address_alloc(const char *name, const char *address, char ***host, |
| 900 | char ***port, int *num) |
| 901 | { |
| 902 | char *p; |
| 903 | |
| 904 | /* do not care about memory leak, argv has to be preserved */ |
| 905 | if ((p = strdup(address)) == NULL((void*)0)) |
| 906 | err(1, "%s address %s", name, address); |
| 907 | if ((*host = reallocarray(*host, *num + 1, sizeof(**host))) == NULL((void*)0)) |
| 908 | err(1, "%s host %s", name, address); |
| 909 | if ((*port = reallocarray(*port, *num + 1, sizeof(**port))) == NULL((void*)0)) |
| 910 | err(1, "%s port %s", name, address); |
| 911 | if (loghost_parse(p, NULL((void*)0), *host + *num, *port + *num) == -1) |
| 912 | errx(1, "bad %s address: %s", name, address); |
| 913 | (*num)++; |
| 914 | } |
| 915 | |
| 916 | int |
| 917 | socket_bind(const char *proto, const char *host, const char *port, |
| 918 | int shutread, int *fd, int *fd6) |
| 919 | { |
| 920 | struct addrinfo hints, *res, *res0; |
| 921 | char hostname[NI_MAXHOST256], servname[NI_MAXSERV32]; |
| 922 | int *fdp, error, reuseaddr; |
| 923 | |
| 924 | *fd = *fd6 = -1; |
| 925 | if (proto == NULL((void*)0)) |
| 926 | proto = "udp"; |
| 927 | if (port == NULL((void*)0)) |
| 928 | port = strcmp(proto, "tls") == 0 ? "syslog-tls" : "syslog"; |
| 929 | |
| 930 | memset(&hints, 0, sizeof(hints)); |
| 931 | hints.ai_family = Family; |
| 932 | if (strcmp(proto, "udp") == 0) { |
| 933 | hints.ai_socktype = SOCK_DGRAM2; |
| 934 | hints.ai_protocol = IPPROTO_UDP17; |
| 935 | } else { |
| 936 | hints.ai_socktype = SOCK_STREAM1; |
| 937 | hints.ai_protocol = IPPROTO_TCP6; |
| 938 | } |
| 939 | hints.ai_flags = AI_PASSIVE1; |
| 940 | |
| 941 | if ((error = getaddrinfo(host, port, &hints, &res0))) { |
| 942 | log_warnx("getaddrinfo proto %s, host %s, port %s: %s", |
| 943 | proto, host ? host : "*", port, gai_strerror(error)); |
| 944 | return (-1); |
| 945 | } |
| 946 | |
| 947 | for (res = res0; res; res = res->ai_next) { |
| 948 | switch (res->ai_family) { |
| 949 | case AF_INET2: |
| 950 | fdp = fd; |
| 951 | break; |
| 952 | case AF_INET624: |
| 953 | fdp = fd6; |
| 954 | break; |
| 955 | default: |
| 956 | continue; |
| 957 | } |
| 958 | if (*fdp >= 0) |
| 959 | continue; |
| 960 | |
| 961 | if ((*fdp = socket(res->ai_family, |
| 962 | res->ai_socktype | SOCK_NONBLOCK0x4000, res->ai_protocol)) == -1) |
| 963 | continue; |
| 964 | |
| 965 | if (getnameinfo(res->ai_addr, res->ai_addrlen, hostname, |
| 966 | sizeof(hostname), servname, sizeof(servname), |
| 967 | NI_NUMERICHOST1 | NI_NUMERICSERV2 | |
| 968 | (res->ai_socktype == SOCK_DGRAM2 ? NI_DGRAM16 : 0)) != 0) { |
| 969 | log_debug("Malformed bind address"); |
| 970 | hostname[0] = servname[0] = '\0'; |
| 971 | } |
| 972 | if (shutread && shutdown(*fdp, SHUT_RD0) == -1) { |
| 973 | log_warn("shutdown SHUT_RD " |
| 974 | "protocol %d, address %s, portnum %s", |
| 975 | res->ai_protocol, hostname, servname); |
| 976 | close(*fdp); |
| 977 | *fdp = -1; |
| 978 | continue; |
| 979 | } |
| 980 | if (!shutread && res->ai_protocol == IPPROTO_UDP17) |
| 981 | double_sockbuf(*fdp, SO_RCVBUF0x1002, 0); |
| 982 | else if (res->ai_protocol == IPPROTO_TCP6) { |
| 983 | set_sockbuf(*fdp); |
| 984 | set_keepalive(*fdp); |
| 985 | } |
| 986 | reuseaddr = 1; |
| 987 | if (setsockopt(*fdp, SOL_SOCKET0xffff, SO_REUSEADDR0x0004, &reuseaddr, |
| 988 | sizeof(reuseaddr)) == -1) { |
| 989 | log_warn("setsockopt SO_REUSEADDR " |
| 990 | "protocol %d, address %s, portnum %s", |
| 991 | res->ai_protocol, hostname, servname); |
| 992 | close(*fdp); |
| 993 | *fdp = -1; |
| 994 | continue; |
| 995 | } |
| 996 | if (bind(*fdp, res->ai_addr, res->ai_addrlen) == -1) { |
| 997 | log_warn("bind protocol %d, address %s, portnum %s", |
| 998 | res->ai_protocol, hostname, servname); |
| 999 | close(*fdp); |
| 1000 | *fdp = -1; |
| 1001 | continue; |
| 1002 | } |
| 1003 | if (!shutread && res->ai_protocol == IPPROTO_TCP6 && |
| 1004 | listen(*fdp, 10) == -1) { |
| 1005 | log_warn("listen protocol %d, address %s, portnum %s", |
| 1006 | res->ai_protocol, hostname, servname); |
| 1007 | close(*fdp); |
| 1008 | *fdp = -1; |
| 1009 | continue; |
| 1010 | } |
| 1011 | } |
| 1012 | |
| 1013 | freeaddrinfo(res0); |
| 1014 | |
| 1015 | if (*fd == -1 && *fd6 == -1) |
| 1016 | return (-1); |
| 1017 | return (0); |
| 1018 | } |
| 1019 | |
| 1020 | void |
| 1021 | klog_readcb(int fd, short event, void *arg) |
| 1022 | { |
| 1023 | struct event *ev = arg; |
| 1024 | ssize_t n; |
| 1025 | |
| 1026 | n = read(fd, linebuf, linesize - 1); |
| 1027 | if (n > 0) { |
| 1028 | linebuf[n] = '\0'; |
| 1029 | printsys(linebuf); |
| 1030 | } else if (n == -1 && errno(*__errno()) != EINTR4) { |
| 1031 | log_warn("read klog"); |
| 1032 | event_del(ev); |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | void |
| 1037 | udp_readcb(int fd, short event, void *arg) |
| 1038 | { |
| 1039 | struct sockaddr_storage sa; |
| 1040 | socklen_t salen; |
| 1041 | ssize_t n; |
| 1042 | |
| 1043 | salen = sizeof(sa); |
| 1044 | n = recvfrom(fd, linebuf, LOG_MAXLINE8192, 0, (struct sockaddr *)&sa, |
| 1045 | &salen); |
| 1046 | if (n > 0) { |
| 1047 | char resolve[NI_MAXHOST256]; |
| 1048 | |
| 1049 | linebuf[n] = '\0'; |
| 1050 | cvthname((struct sockaddr *)&sa, resolve, sizeof(resolve)); |
| 1051 | log_debug("cvthname res: %s", resolve); |
| 1052 | printline(resolve, linebuf); |
| 1053 | } else if (n == -1 && errno(*__errno()) != EINTR4 && errno(*__errno()) != EWOULDBLOCK35) |
| 1054 | log_warn("recvfrom udp"); |
| 1055 | } |
| 1056 | |
| 1057 | void |
| 1058 | unix_readcb(int fd, short event, void *arg) |
| 1059 | { |
| 1060 | struct sockaddr_un sa; |
| 1061 | socklen_t salen; |
| 1062 | ssize_t n; |
| 1063 | |
| 1064 | salen = sizeof(sa); |
| 1065 | n = recvfrom(fd, linebuf, LOG_MAXLINE8192, 0, (struct sockaddr *)&sa, |
| 1066 | &salen); |
| 1067 | if (n > 0) { |
| 1068 | linebuf[n] = '\0'; |
| 1069 | printline(LocalHostName, linebuf); |
| 1070 | } else if (n == -1 && errno(*__errno()) != EINTR4 && errno(*__errno()) != EWOULDBLOCK35) |
| 1071 | log_warn("recvfrom unix"); |
| 1072 | } |
| 1073 | |
| 1074 | int |
| 1075 | reserve_accept4(int lfd, int event, struct event *ev, |
| 1076 | void (*cb)(int, short, void *), |
| 1077 | struct sockaddr *sa, socklen_t *salen, int flags) |
| 1078 | { |
| 1079 | struct timeval to = { 1, 0 }; |
| 1080 | int afd; |
| 1081 | |
| 1082 | if (event & EV_TIMEOUT0x01) { |
| 1083 | log_debug("Listen again"); |
| 1084 | /* Enable the listen event, there is no timeout anymore. */ |
| 1085 | event_set(ev, lfd, EV_READ0x02|EV_PERSIST0x10, cb, ev); |
| 1086 | event_add(ev, NULL((void*)0)); |
| 1087 | errno(*__errno()) = EWOULDBLOCK35; |
| 1088 | return (-1); |
| 1089 | } |
| 1090 | |
| 1091 | if (getdtablecount() + FD_RESERVE5 >= getdtablesize()) { |
| 1092 | afd = -1; |
| 1093 | errno(*__errno()) = EMFILE24; |
| 1094 | } else |
| 1095 | afd = accept4(lfd, sa, salen, flags); |
| 1096 | |
| 1097 | if (afd == -1 && (errno(*__errno()) == ENFILE23 || errno(*__errno()) == EMFILE24)) { |
| 1098 | log_info(LOG_WARNING4, "accept deferred: %s", strerror(errno(*__errno()))); |
| 1099 | /* |
| 1100 | * Disable the listen event and convert it to a timeout. |
| 1101 | * Pass the listen file descriptor to the callback. |
| 1102 | */ |
| 1103 | event_del(ev); |
| 1104 | event_set(ev, lfd, 0, cb, ev); |
| 1105 | event_add(ev, &to); |
| 1106 | return (-1); |
| 1107 | } |
| 1108 | |
| 1109 | return (afd); |
| 1110 | } |
| 1111 | |
| 1112 | void |
| 1113 | tcp_acceptcb(int lfd, short event, void *arg) |
| 1114 | { |
| 1115 | acceptcb(lfd, event, arg, 0); |
| 1116 | } |
| 1117 | |
| 1118 | void |
| 1119 | tls_acceptcb(int lfd, short event, void *arg) |
| 1120 | { |
| 1121 | acceptcb(lfd, event, arg, 1); |
| 1122 | } |
| 1123 | |
| 1124 | void |
| 1125 | acceptcb(int lfd, short event, void *arg, int usetls) |
| 1126 | { |
| 1127 | struct event *ev = arg; |
| 1128 | struct peer *p; |
| 1129 | struct sockaddr_storage ss; |
| 1130 | socklen_t sslen; |
| 1131 | char hostname[NI_MAXHOST256], servname[NI_MAXSERV32]; |
| 1132 | char *peername; |
| 1133 | int fd; |
| 1134 | |
| 1135 | sslen = sizeof(ss); |
| 1136 | if ((fd = reserve_accept4(lfd, event, ev, tcp_acceptcb, |
| 1137 | (struct sockaddr *)&ss, &sslen, SOCK_NONBLOCK0x4000)) == -1) { |
| 1138 | if (errno(*__errno()) != ENFILE23 && errno(*__errno()) != EMFILE24 && |
| 1139 | errno(*__errno()) != EINTR4 && errno(*__errno()) != EWOULDBLOCK35 && |
| 1140 | errno(*__errno()) != ECONNABORTED53) |
| 1141 | log_warn("accept tcp socket"); |
| 1142 | return; |
| 1143 | } |
| 1144 | log_debug("Accepting tcp connection"); |
| 1145 | |
| 1146 | if (getnameinfo((struct sockaddr *)&ss, sslen, hostname, |
| 1147 | sizeof(hostname), servname, sizeof(servname), |
| 1148 | NI_NUMERICHOST1 | NI_NUMERICSERV2) != 0 || |
| 1149 | asprintf(&peername, ss.ss_family == AF_INET624 ? |
| 1150 | "[%s]:%s" : "%s:%s", hostname, servname) == -1) { |
| 1151 | log_debug("Malformed accept address"); |
| 1152 | peername = hostname_unknown; |
| 1153 | } |
| 1154 | log_debug("Peer addresss and port %s", peername); |
| 1155 | if ((p = malloc(sizeof(*p))) == NULL((void*)0)) { |
| 1156 | log_warn("allocate \"%s\"", peername); |
| 1157 | close(fd); |
| 1158 | return; |
| 1159 | } |
| 1160 | p->p_fd = fd; |
| 1161 | if ((p->p_bufev = bufferevent_new(fd, tcp_readcb, NULL((void*)0), tcp_closecb, |
| 1162 | p)) == NULL((void*)0)) { |
| 1163 | log_warn("bufferevent \"%s\"", peername); |
| 1164 | free(p); |
| 1165 | close(fd); |
| 1166 | return; |
| 1167 | } |
| 1168 | p->p_ctx = NULL((void*)0); |
| 1169 | if (usetls) { |
| 1170 | if (tls_accept_socket(server_ctx, &p->p_ctx, fd) == -1) { |
| 1171 | log_warnx("tls_accept_socket \"%s\": %s", |
| 1172 | peername, tls_error(server_ctx)); |
| 1173 | bufferevent_free(p->p_bufev); |
| 1174 | free(p); |
| 1175 | close(fd); |
| 1176 | return; |
| 1177 | } |
| 1178 | buffertls_set(&p->p_buftls, p->p_bufev, p->p_ctx, fd); |
| 1179 | buffertls_accept(&p->p_buftls, fd); |
| 1180 | log_debug("tcp accept callback: tls context success"); |
| 1181 | } |
| 1182 | if (!NoDNS && peername != hostname_unknown && |
| 1183 | priv_getnameinfo((struct sockaddr *)&ss, ss.ss_len, hostname, |
| 1184 | sizeof(hostname)) != 0) { |
| 1185 | log_debug("Host name for accept address (%s) unknown", |
| 1186 | hostname); |
| 1187 | } |
| 1188 | if (peername == hostname_unknown || |
| 1189 | (p->p_hostname = strdup(hostname)) == NULL((void*)0)) |
| 1190 | p->p_hostname = hostname_unknown; |
| 1191 | log_debug("Peer hostname %s", hostname); |
| 1192 | p->p_peername = peername; |
| 1193 | bufferevent_enable(p->p_bufev, EV_READ0x02); |
| 1194 | |
| 1195 | log_info(LOG_DEBUG7, "%s logger \"%s\" accepted", |
| 1196 | p->p_ctx ? "tls" : "tcp", peername); |
| 1197 | } |
| 1198 | |
| 1199 | /* |
| 1200 | * Syslog over TCP RFC 6587 3.4.1. Octet Counting |
| 1201 | */ |
| 1202 | int |
| 1203 | octet_counting(struct evbuffer *evbuf, char **msg, int drain) |
| 1204 | { |
| 1205 | char *p, *buf, *end; |
| 1206 | int len; |
| 1207 | |
| 1208 | buf = EVBUFFER_DATA(evbuf)(evbuf)->buffer; |
| 1209 | end = buf + EVBUFFER_LENGTH(evbuf)(evbuf)->off; |
| 1210 | /* |
| 1211 | * It can be assumed that octet-counting framing is used if a syslog |
| 1212 | * frame starts with a digit. |
| 1213 | */ |
| 1214 | if (buf >= end || !isdigit((unsigned char)*buf)) |
| 1215 | return (-1); |
| 1216 | /* |
| 1217 | * SYSLOG-FRAME = MSG-LEN SP SYSLOG-MSG |
| 1218 | * MSG-LEN is the octet count of the SYSLOG-MSG in the SYSLOG-FRAME. |
| 1219 | * We support up to 5 digits in MSG-LEN, so the maximum is 99999. |
| 1220 | */ |
| 1221 | for (p = buf; p < end && p < buf + 5; p++) { |
| 1222 | if (!isdigit((unsigned char)*p)) |
| 1223 | break; |
| 1224 | } |
| 1225 | if (buf >= p || p >= end || *p != ' ') |
| 1226 | return (-1); |
| 1227 | p++; |
| 1228 | /* Using atoi() is safe as buf starts with 1 to 5 digits and a space. */ |
| 1229 | len = atoi(buf); |
| 1230 | if (drain) |
| 1231 | log_debugadd(" octet counting %d", len); |
| 1232 | if (p + len > end) |
| 1233 | return (0); |
| 1234 | if (drain) |
| 1235 | evbuffer_drain(evbuf, p - buf); |
| 1236 | if (msg) |
| 1237 | *msg = p; |
| 1238 | return (len); |
| 1239 | } |
| 1240 | |
| 1241 | /* |
| 1242 | * Syslog over TCP RFC 6587 3.4.2. Non-Transparent-Framing |
| 1243 | */ |
| 1244 | int |
| 1245 | non_transparent_framing(struct evbuffer *evbuf, char **msg) |
| 1246 | { |
| 1247 | char *p, *buf, *end; |
| 1248 | |
| 1249 | buf = EVBUFFER_DATA(evbuf)(evbuf)->buffer; |
| 1250 | end = buf + EVBUFFER_LENGTH(evbuf)(evbuf)->off; |
| 1251 | /* |
| 1252 | * The TRAILER has usually been a single character and most often |
| 1253 | * is ASCII LF (%d10). However, other characters have also been |
| 1254 | * seen, with ASCII NUL (%d00) being a prominent example. |
| 1255 | */ |
| 1256 | for (p = buf; p < end; p++) { |
| 1257 | if (*p == '\0' || *p == '\n') |
| 1258 | break; |
| 1259 | } |
| 1260 | if (p + 1 - buf >= INT_MAX2147483647) |
| 1261 | return (-1); |
| 1262 | log_debugadd(" non transparent framing"); |
| 1263 | if (p >= end) |
| 1264 | return (0); |
| 1265 | /* |
| 1266 | * Some devices have also been seen to emit a two-character |
| 1267 | * TRAILER, which is usually CR and LF. |
| 1268 | */ |
| 1269 | if (buf < p && p[0] == '\n' && p[-1] == '\r') |
| 1270 | p[-1] = '\0'; |
| 1271 | if (msg) |
| 1272 | *msg = buf; |
| 1273 | return (p + 1 - buf); |
| 1274 | } |
| 1275 | |
| 1276 | void |
| 1277 | tcp_readcb(struct bufferevent *bufev, void *arg) |
| 1278 | { |
| 1279 | struct peer *p = arg; |
| 1280 | char *msg; |
| 1281 | int len; |
| 1282 | |
| 1283 | while (EVBUFFER_LENGTH(bufev->input)(bufev->input)->off > 0) { |
| 1284 | log_debugadd("%s logger \"%s\"", p->p_ctx ? "tls" : "tcp", |
| 1285 | p->p_peername); |
| 1286 | msg = NULL((void*)0); |
| 1287 | len = octet_counting(bufev->input, &msg, 1); |
| 1288 | if (len < 0) |
| 1289 | len = non_transparent_framing(bufev->input, &msg); |
| 1290 | if (len < 0) |
| 1291 | log_debugadd("unknown method"); |
| 1292 | if (msg == NULL((void*)0)) { |
| 1293 | log_debugadd(", incomplete frame"); |
| 1294 | break; |
| 1295 | } |
| 1296 | log_debug(", use %d bytes", len); |
| 1297 | if (len > 0 && msg[len-1] == '\n') |
| 1298 | msg[len-1] = '\0'; |
| 1299 | if (len == 0 || msg[len-1] != '\0') { |
| 1300 | memcpy(linebuf, msg, MINIMUM(len, LOG_MAXLINE)(((len) < (8192)) ? (len) : (8192))); |
| 1301 | linebuf[MINIMUM(len, LOG_MAXLINE)(((len) < (8192)) ? (len) : (8192))] = '\0'; |
| 1302 | msg = linebuf; |
| 1303 | } |
| 1304 | printline(p->p_hostname, msg); |
| 1305 | evbuffer_drain(bufev->input, len); |
| 1306 | } |
| 1307 | /* Maximum frame has 5 digits, 1 space, MAXLINE chars, 1 new line. */ |
| 1308 | if (EVBUFFER_LENGTH(bufev->input)(bufev->input)->off >= 5 + 1 + LOG_MAXLINE8192 + 1) { |
| 1309 | log_debug(", use %zu bytes", EVBUFFER_LENGTH(bufev->input)(bufev->input)->off); |
| 1310 | EVBUFFER_DATA(bufev->input)(bufev->input)->buffer[5 + 1 + LOG_MAXLINE8192] = '\0'; |
| 1311 | printline(p->p_hostname, EVBUFFER_DATA(bufev->input)(bufev->input)->buffer); |
| 1312 | evbuffer_drain(bufev->input, -1); |
| 1313 | } else if (EVBUFFER_LENGTH(bufev->input)(bufev->input)->off > 0) |
| 1314 | log_debug(", buffer %zu bytes", EVBUFFER_LENGTH(bufev->input)(bufev->input)->off); |
| 1315 | } |
| 1316 | |
| 1317 | void |
| 1318 | tcp_closecb(struct bufferevent *bufev, short event, void *arg) |
| 1319 | { |
| 1320 | struct peer *p = arg; |
| 1321 | |
| 1322 | if (event & EVBUFFER_EOF0x10) { |
| 1323 | log_info(LOG_DEBUG7, "%s logger \"%s\" connection close", |
| 1324 | p->p_ctx ? "tls" : "tcp", p->p_peername); |
| 1325 | } else { |
| 1326 | log_info(LOG_NOTICE5, "%s logger \"%s\" connection error: %s", |
| 1327 | p->p_ctx ? "tls" : "tcp", p->p_peername, |
| 1328 | p->p_ctx ? tls_error(p->p_ctx) : strerror(errno(*__errno()))); |
| 1329 | } |
| 1330 | |
| 1331 | if (p->p_peername != hostname_unknown) |
| 1332 | free(p->p_peername); |
| 1333 | if (p->p_hostname != hostname_unknown) |
| 1334 | free(p->p_hostname); |
| 1335 | bufferevent_free(p->p_bufev); |
| 1336 | close(p->p_fd); |
| 1337 | free(p); |
| 1338 | } |
| 1339 | |
| 1340 | int |
| 1341 | tcp_socket(struct filed *f) |
| 1342 | { |
| 1343 | int s; |
| 1344 | |
| 1345 | if ((s = socket(f->f_un.f_forw.f_addr.ss_family, |
| 1346 | SOCK_STREAM1 | SOCK_NONBLOCK0x4000, IPPROTO_TCP6)) == -1) { |
| 1347 | log_warn("socket \"%s\"", f->f_un.f_forw.f_loghost); |
| 1348 | return (-1); |
| 1349 | } |
| 1350 | set_sockbuf(s); |
| 1351 | if (connect(s, (struct sockaddr *)&f->f_un.f_forw.f_addr, |
| 1352 | f->f_un.f_forw.f_addr.ss_len) == -1 && errno(*__errno()) != EINPROGRESS36) { |
| 1353 | log_warn("connect \"%s\"", f->f_un.f_forw.f_loghost); |
| 1354 | close(s); |
| 1355 | return (-1); |
| 1356 | } |
| 1357 | return (s); |
| 1358 | } |
| 1359 | |
| 1360 | void |
| 1361 | tcp_dropcb(struct bufferevent *bufev, void *arg) |
| 1362 | { |
| 1363 | struct filed *f = arg; |
| 1364 | |
| 1365 | /* |
| 1366 | * Drop data received from the forward log server. |
| 1367 | */ |
| 1368 | log_debug("loghost \"%s\" did send %zu bytes back", |
| 1369 | f->f_un.f_forw.f_loghost, EVBUFFER_LENGTH(bufev->input)(bufev->input)->off); |
| 1370 | evbuffer_drain(bufev->input, -1); |
| 1371 | } |
| 1372 | |
| 1373 | void |
| 1374 | tcp_writecb(struct bufferevent *bufev, void *arg) |
| 1375 | { |
| 1376 | struct filed *f = arg; |
| 1377 | char ebuf[ERRBUFSIZE256]; |
| 1378 | |
| 1379 | /* |
| 1380 | * Successful write, connection to server is good, reset wait time. |
| 1381 | */ |
| 1382 | log_debug("loghost \"%s\" successful write", f->f_un.f_forw.f_loghost); |
| 1383 | f->f_un.f_forw.f_reconnectwait = 0; |
| 1384 | |
| 1385 | if (f->f_dropped > 0 && |
| 1386 | EVBUFFER_LENGTH(f->f_un.f_forw.f_bufev->output)(f->f_un.f_forw.f_bufev->output)->off < MAX_TCPBUF(256 * 1024)) { |
| 1387 | snprintf(ebuf, sizeof(ebuf), "to loghost \"%s\"", |
| 1388 | f->f_un.f_forw.f_loghost); |
| 1389 | dropped_warn(&f->f_dropped, ebuf); |
| 1390 | } |
| 1391 | } |
| 1392 | |
| 1393 | void |
| 1394 | tcp_errorcb(struct bufferevent *bufev, short event, void *arg) |
| 1395 | { |
| 1396 | struct filed *f = arg; |
| 1397 | char *p, *buf, *end; |
| 1398 | int l; |
| 1399 | char ebuf[ERRBUFSIZE256]; |
| 1400 | |
| 1401 | if (event & EVBUFFER_EOF0x10) |
| 1402 | snprintf(ebuf, sizeof(ebuf), "loghost \"%s\" connection close", |
| 1403 | f->f_un.f_forw.f_loghost); |
| 1404 | else |
| 1405 | snprintf(ebuf, sizeof(ebuf), |
| 1406 | "loghost \"%s\" connection error: %s", |
| 1407 | f->f_un.f_forw.f_loghost, f->f_un.f_forw.f_ctx ? |
| 1408 | tls_error(f->f_un.f_forw.f_ctx) : strerror(errno(*__errno()))); |
| 1409 | log_debug("%s", ebuf); |
| 1410 | |
| 1411 | /* The SIGHUP handler may also close the socket, so invalidate it. */ |
| 1412 | if (f->f_un.f_forw.f_ctx) { |
| 1413 | tls_close(f->f_un.f_forw.f_ctx); |
| 1414 | tls_free(f->f_un.f_forw.f_ctx); |
| 1415 | f->f_un.f_forw.f_ctx = NULL((void*)0); |
| 1416 | } |
| 1417 | close(f->f_file); |
| 1418 | f->f_file = -1; |
| 1419 | |
| 1420 | /* |
| 1421 | * The messages in the output buffer may be out of sync. |
| 1422 | * Check that the buffer starts with "1234 <1234 octets>\n". |
| 1423 | * Otherwise remove the partial message from the beginning. |
| 1424 | */ |
| 1425 | buf = EVBUFFER_DATA(bufev->output)(bufev->output)->buffer; |
| 1426 | end = buf + EVBUFFER_LENGTH(bufev->output)(bufev->output)->off; |
| 1427 | if (buf < end && !((l = octet_counting(bufev->output, &p, 0)) > 0 && |
| 1428 | p[l-1] == '\n')) { |
| 1429 | for (p = buf; p < end; p++) { |
| 1430 | if (*p == '\n') { |
| 1431 | evbuffer_drain(bufev->output, p - buf + 1); |
| 1432 | break; |
| 1433 | } |
| 1434 | } |
| 1435 | /* Without '\n' discard everything. */ |
| 1436 | if (p == end) |
| 1437 | evbuffer_drain(bufev->output, -1); |
| 1438 | log_debug("loghost \"%s\" dropped partial message", |
| 1439 | f->f_un.f_forw.f_loghost); |
| 1440 | f->f_dropped++; |
| 1441 | } |
| 1442 | |
| 1443 | tcp_connect_retry(bufev, f); |
| 1444 | |
| 1445 | /* Log the connection error to the fresh buffer after reconnecting. */ |
| 1446 | log_info(LOG_WARNING4, "%s", ebuf); |
| 1447 | } |
| 1448 | |
| 1449 | void |
| 1450 | tcp_connectcb(int fd, short event, void *arg) |
| 1451 | { |
| 1452 | struct filed *f = arg; |
| 1453 | struct bufferevent *bufev = f->f_un.f_forw.f_bufev; |
| 1454 | int s; |
| 1455 | |
| 1456 | if ((s = tcp_socket(f)) == -1) { |
| 1457 | tcp_connect_retry(bufev, f); |
| 1458 | return; |
| 1459 | } |
| 1460 | log_debug("tcp connect callback: socket success, event %#x", event); |
| 1461 | f->f_file = s; |
| 1462 | |
| 1463 | bufferevent_setfd(bufev, s); |
| 1464 | bufferevent_setcb(bufev, tcp_dropcb, tcp_writecb, tcp_errorcb, f); |
| 1465 | /* |
| 1466 | * Although syslog is a write only protocol, enable reading from |
| 1467 | * the socket to detect connection close and errors. |
| 1468 | */ |
| 1469 | bufferevent_enable(bufev, EV_READ0x02|EV_WRITE0x04); |
| 1470 | |
| 1471 | if (f->f_type == F_FORWTLS10) { |
| 1472 | if ((f->f_un.f_forw.f_ctx = tls_client()) == NULL((void*)0)) { |
| 1473 | log_warn("tls_client \"%s\"", f->f_un.f_forw.f_loghost); |
| 1474 | goto error; |
| 1475 | } |
| 1476 | if (client_config && |
| 1477 | tls_configure(f->f_un.f_forw.f_ctx, client_config) == -1) { |
| 1478 | log_warnx("tls_configure \"%s\": %s", |
| 1479 | f->f_un.f_forw.f_loghost, |
| 1480 | tls_error(f->f_un.f_forw.f_ctx)); |
| 1481 | goto error; |
| 1482 | } |
| 1483 | if (tls_connect_socket(f->f_un.f_forw.f_ctx, s, |
| 1484 | f->f_un.f_forw.f_host) == -1) { |
| 1485 | log_warnx("tls_connect_socket \"%s\": %s", |
| 1486 | f->f_un.f_forw.f_loghost, |
| 1487 | tls_error(f->f_un.f_forw.f_ctx)); |
| 1488 | goto error; |
| 1489 | } |
| 1490 | log_debug("tcp connect callback: tls context success"); |
| 1491 | |
| 1492 | buffertls_set(&f->f_un.f_forw.f_buftls, bufev, |
| 1493 | f->f_un.f_forw.f_ctx, s); |
| 1494 | buffertls_connect(&f->f_un.f_forw.f_buftls, s); |
| 1495 | } |
| 1496 | |
| 1497 | return; |
| 1498 | |
| 1499 | error: |
| 1500 | if (f->f_un.f_forw.f_ctx) { |
| 1501 | tls_free(f->f_un.f_forw.f_ctx); |
| 1502 | f->f_un.f_forw.f_ctx = NULL((void*)0); |
| 1503 | } |
| 1504 | close(f->f_file); |
| 1505 | f->f_file = -1; |
| 1506 | tcp_connect_retry(bufev, f); |
| 1507 | } |
| 1508 | |
| 1509 | void |
| 1510 | tcp_connect_retry(struct bufferevent *bufev, struct filed *f) |
| 1511 | { |
| 1512 | struct timeval to; |
| 1513 | |
| 1514 | if (f->f_un.f_forw.f_reconnectwait == 0) |
| 1515 | f->f_un.f_forw.f_reconnectwait = 1; |
| 1516 | else |
| 1517 | f->f_un.f_forw.f_reconnectwait <<= 1; |
| 1518 | if (f->f_un.f_forw.f_reconnectwait > 600) |
| 1519 | f->f_un.f_forw.f_reconnectwait = 600; |
| 1520 | to.tv_sec = f->f_un.f_forw.f_reconnectwait; |
| 1521 | to.tv_usec = 0; |
| 1522 | |
| 1523 | log_debug("tcp connect retry: wait %d", |
| 1524 | f->f_un.f_forw.f_reconnectwait); |
| 1525 | bufferevent_setfd(bufev, -1); |
| 1526 | /* We can reuse the write event as bufferevent is disabled. */ |
| 1527 | evtimer_set(&bufev->ev_write, tcp_connectcb, f)event_set(&bufev->ev_write, -1, 0, tcp_connectcb, f); |
| 1528 | evtimer_add(&bufev->ev_write, &to)event_add(&bufev->ev_write, &to); |
| 1529 | } |
| 1530 | |
| 1531 | int |
| 1532 | tcpbuf_countmsg(struct bufferevent *bufev) |
| 1533 | { |
| 1534 | char *p, *buf, *end; |
| 1535 | int i = 0; |
| 1536 | |
| 1537 | buf = EVBUFFER_DATA(bufev->output)(bufev->output)->buffer; |
| 1538 | end = buf + EVBUFFER_LENGTH(bufev->output)(bufev->output)->off; |
| 1539 | for (p = buf; p < end; p++) { |
| 1540 | if (*p == '\n') |
| 1541 | i++; |
| 1542 | } |
| 1543 | return (i); |
| 1544 | } |
| 1545 | |
| 1546 | void |
| 1547 | usage(void) |
| 1548 | { |
| 1549 | |
| 1550 | (void)fprintf(stderr(&__sF[2]), |
| 1551 | "usage: syslogd [-46dFhnruVZ] [-a path] [-C CAfile]\n" |
| 1552 | "\t[-c cert_file] [-f config_file] [-K CAfile] [-k key_file]\n" |
| 1553 | "\t[-m mark_interval] [-p log_socket] [-S listen_address]\n" |
| 1554 | "\t[-s reporting_socket] [-T listen_address] [-U bind_address]\n"); |
| 1555 | exit(1); |
| 1556 | } |
| 1557 | |
| 1558 | /* |
| 1559 | * Parse a priority code of the form "<123>" into pri, and return the |
| 1560 | * length of the priority code including the surrounding angle brackets. |
| 1561 | */ |
| 1562 | size_t |
| 1563 | parsepriority(const char *msg, int *pri) |
| 1564 | { |
| 1565 | size_t nlen; |
| 1566 | char buf[11]; |
| 1567 | const char *errstr; |
| 1568 | int maybepri; |
| 1569 | |
| 1570 | if (*msg++ == '<') { |
| 1571 | nlen = strspn(msg, "1234567890"); |
| 1572 | if (nlen > 0 && nlen < sizeof(buf) && msg[nlen] == '>') { |
| 1573 | strlcpy(buf, msg, nlen + 1); |
| 1574 | maybepri = strtonum(buf, 0, INT_MAX2147483647, &errstr); |
| 1575 | if (errstr == NULL((void*)0)) { |
| 1576 | *pri = maybepri; |
| 1577 | return nlen + 2; |
| 1578 | } |
| 1579 | } |
| 1580 | } |
| 1581 | |
| 1582 | return 0; |
| 1583 | } |
| 1584 | |
| 1585 | /* |
| 1586 | * Take a raw input line, decode the message, and print the message |
| 1587 | * on the appropriate log files. |
| 1588 | */ |
| 1589 | void |
| 1590 | printline(char *hname, char *msg) |
| 1591 | { |
| 1592 | int pri; |
| 1593 | char *p, *q, line[LOG_MAXLINE8192 + 4 + 1]; /* message, encoding, NUL */ |
| 1594 | |
| 1595 | /* test for special codes */ |
| 1596 | pri = DEFUPRI((1<<3)|5); |
| 1597 | p = msg; |
| 1598 | p += parsepriority(p, &pri); |
| 1599 | if (pri &~ (LOG_FACMASK0x03f8|LOG_PRIMASK0x07)) |
| 1600 | pri = DEFUPRI((1<<3)|5); |
| 1601 | |
| 1602 | /* |
| 1603 | * Don't allow users to log kernel messages. |
| 1604 | * NOTE: since LOG_KERN == 0 this will also match |
| 1605 | * messages with no facility specified. |
| 1606 | */ |
| 1607 | if (LOG_FAC(pri)(((pri) & 0x03f8) >> 3) == LOG_KERN(0<<3)) |
| 1608 | pri = LOG_USER(1<<3) | LOG_PRI(pri)((pri) & 0x07); |
| 1609 | |
| 1610 | for (q = line; *p && q < &line[LOG_MAXLINE8192]; p++) { |
| 1611 | if (*p == '\n') |
| 1612 | *q++ = ' '; |
| 1613 | else |
| 1614 | q = vis(q, *p, 0, 0); |
| 1615 | } |
| 1616 | line[LOG_MAXLINE8192] = *q = '\0'; |
| 1617 | |
| 1618 | logline(pri, 0, hname, line); |
| 1619 | } |
| 1620 | |
| 1621 | /* |
| 1622 | * Take a raw input line from /dev/klog, split and format similar to syslog(). |
| 1623 | */ |
| 1624 | void |
| 1625 | printsys(char *msg) |
| 1626 | { |
| 1627 | int c, pri, flags; |
| 1628 | char *lp, *p, *q, line[LOG_MAXLINE8192 + 1]; |
| 1629 | size_t prilen; |
| 1630 | int l; |
| 1631 | |
| 1632 | l = snprintf(line, sizeof(line), "%s: ", _PATH_UNIX"/bsd"); |
| 1633 | if (l < 0 || l >= sizeof(line)) { |
| 1634 | line[0] = '\0'; |
| 1635 | l = 0; |
| 1636 | } |
| 1637 | lp = line + l; |
| 1638 | for (p = msg; *p != '\0'; ) { |
| 1639 | flags = SYNC_FILE0x002 | ADDDATE0x004; /* fsync file after write */ |
| 1640 | pri = DEFSPRI((0<<3)|2); |
| 1641 | prilen = parsepriority(p, &pri); |
| 1642 | p += prilen; |
| 1643 | if (prilen == 0) { |
| 1644 | /* kernel printf's come out on console */ |
| 1645 | flags |= IGN_CONS0x001; |
| 1646 | } |
| 1647 | if (pri &~ (LOG_FACMASK0x03f8|LOG_PRIMASK0x07)) |
| 1648 | pri = DEFSPRI((0<<3)|2); |
| 1649 | |
| 1650 | q = lp; |
| 1651 | while (*p && (c = *p++) != '\n' && q < &line[sizeof(line) - 4]) |
| 1652 | q = vis(q, c, 0, 0); |
| 1653 | |
| 1654 | logline(pri, flags, LocalHostName, line); |
| 1655 | } |
| 1656 | } |
| 1657 | |
| 1658 | void |
| 1659 | vlogmsg(int pri, const char *proc, const char *fmt, va_list ap) |
| 1660 | { |
| 1661 | char msg[ERRBUFSIZE256]; |
| 1662 | int l; |
| 1663 | |
| 1664 | l = snprintf(msg, sizeof(msg), "%s[%d]: ", proc, getpid()); |
| 1665 | if (l < 0 || l >= sizeof(msg)) |
| 1666 | l = 0; |
| 1667 | l = vsnprintf(msg + l, sizeof(msg) - l, fmt, ap); |
| 1668 | if (l < 0) |
| 1669 | strlcpy(msg, fmt, sizeof(msg)); |
| 1670 | |
| 1671 | if (!Started) { |
| 1672 | fprintf(stderr(&__sF[2]), "%s\n", msg); |
| 1673 | init_dropped++; |
| 1674 | return; |
| 1675 | } |
| 1676 | logline(pri, ADDDATE0x004, LocalHostName, msg); |
| 1677 | } |
| 1678 | |
| 1679 | struct timeval now; |
| 1680 | |
| 1681 | /* |
| 1682 | * Log a message to the appropriate log files, users, etc. based on |
| 1683 | * the priority. |
| 1684 | */ |
| 1685 | void |
| 1686 | logline(int pri, int flags, char *from, char *msg) |
| 1687 | { |
| 1688 | struct filed *f; |
| 1689 | int fac, msglen, prilev, i; |
| 1690 | char timestamp[33]; |
| 1691 | char prog[NAME_MAX255+1]; |
| 1692 | |
| 1693 | log_debug("logline: pri 0%o, flags 0x%x, from %s, msg %s", |
| 1694 | pri, flags, from, msg); |
| 1695 | |
| 1696 | /* |
| 1697 | * Check to see if msg looks non-standard. |
| 1698 | */ |
| 1699 | timestamp[0] = '\0'; |
| 1700 | msglen = strlen(msg); |
| 1701 | if ((flags & ADDDATE0x004) == 0) { |
| 1702 | if (msglen >= 16 && msg[3] == ' ' && msg[6] == ' ' && |
| 1703 | msg[9] == ':' && msg[12] == ':' && msg[15] == ' ') { |
| 1704 | /* BSD syslog TIMESTAMP, RFC 3164 */ |
| 1705 | strlcpy(timestamp, msg, 16); |
| 1706 | msg += 16; |
| 1707 | msglen -= 16; |
| 1708 | if (ZuluTime) |
| 1709 | flags |= ADDDATE0x004; |
| 1710 | } else if (msglen >= 20 && |
| 1711 | isdigit(msg[0]) && isdigit(msg[1]) && isdigit(msg[2]) && |
| 1712 | isdigit(msg[3]) && msg[4] == '-' && |
| 1713 | isdigit(msg[5]) && isdigit(msg[6]) && msg[7] == '-' && |
| 1714 | isdigit(msg[8]) && isdigit(msg[9]) && msg[10] == 'T' && |
| 1715 | isdigit(msg[11]) && isdigit(msg[12]) && msg[13] == ':' && |
| 1716 | isdigit(msg[14]) && isdigit(msg[15]) && msg[16] == ':' && |
| 1717 | isdigit(msg[17]) && isdigit(msg[18]) && (msg[19] == '.' || |
| 1718 | msg[19] == 'Z' || msg[19] == '+' || msg[19] == '-')) { |
| 1719 | /* FULL-DATE "T" FULL-TIME, RFC 5424 */ |
| 1720 | strlcpy(timestamp, msg, sizeof(timestamp)); |
| 1721 | msg += 19; |
| 1722 | msglen -= 19; |
| 1723 | i = 0; |
| 1724 | if (msglen >= 3 && msg[0] == '.' && isdigit(msg[1])) { |
| 1725 | /* TIME-SECFRAC */ |
| 1726 | msg += 2; |
| 1727 | msglen -= 2; |
| 1728 | i += 2; |
| 1729 | while(i < 7 && msglen >= 1 && isdigit(msg[0])) { |
| 1730 | msg++; |
| 1731 | msglen--; |
| 1732 | i++; |
| 1733 | } |
| 1734 | } |
| 1735 | if (msglen >= 2 && msg[0] == 'Z' && msg[1] == ' ') { |
| 1736 | /* "Z" */ |
| 1737 | timestamp[20+i] = '\0'; |
| 1738 | msg += 2; |
| 1739 | msglen -= 2; |
| 1740 | } else if (msglen >= 7 && |
| 1741 | (msg[0] == '+' || msg[0] == '-') && |
| 1742 | isdigit(msg[1]) && isdigit(msg[2]) && |
| 1743 | msg[3] == ':' && |
| 1744 | isdigit(msg[4]) && isdigit(msg[5]) && |
| 1745 | msg[6] == ' ') { |
| 1746 | /* TIME-NUMOFFSET */ |
| 1747 | timestamp[25+i] = '\0'; |
| 1748 | msg += 7; |
| 1749 | msglen -= 7; |
| 1750 | } else { |
| 1751 | /* invalid time format, roll back */ |
| 1752 | timestamp[0] = '\0'; |
| 1753 | msg -= 19 + i; |
| 1754 | msglen += 19 + i; |
| 1755 | flags |= ADDDATE0x004; |
| 1756 | } |
| 1757 | } else if (msglen >= 2 && msg[0] == '-' && msg[1] == ' ') { |
| 1758 | /* NILVALUE, RFC 5424 */ |
| 1759 | msg += 2; |
| 1760 | msglen -= 2; |
| 1761 | flags |= ADDDATE0x004; |
| 1762 | } else |
| 1763 | flags |= ADDDATE0x004; |
| 1764 | } |
| 1765 | |
| 1766 | (void)gettimeofday(&now, NULL((void*)0)); |
| 1767 | if (flags & ADDDATE0x004) { |
| 1768 | if (ZuluTime) { |
| 1769 | struct tm *tm; |
| 1770 | size_t l; |
| 1771 | |
| 1772 | tm = gmtime(&now.tv_sec); |
| 1773 | l = strftime(timestamp, sizeof(timestamp), "%FT%T", tm); |
| 1774 | /* |
| 1775 | * Use only millisecond precision as some time has |
| 1776 | * passed since syslog(3) was called. |
| 1777 | */ |
| 1778 | snprintf(timestamp + l, sizeof(timestamp) - l, |
| 1779 | ".%03ldZ", now.tv_usec / 1000); |
| 1780 | } else |
| 1781 | strlcpy(timestamp, ctime(&now.tv_sec) + 4, 16); |
| 1782 | } |
| 1783 | |
| 1784 | /* extract facility and priority level */ |
| 1785 | if (flags & MARK0x008) |
| 1786 | fac = LOG_NFACILITIES24; |
| 1787 | else { |
| 1788 | fac = LOG_FAC(pri)(((pri) & 0x03f8) >> 3); |
| 1789 | if (fac >= LOG_NFACILITIES24 || fac < 0) |
| 1790 | fac = LOG_USER(1<<3); |
| 1791 | } |
| 1792 | prilev = LOG_PRI(pri)((pri) & 0x07); |
| 1793 | |
| 1794 | /* extract program name */ |
| 1795 | while (isspace((unsigned char)*msg)) { |
| 1796 | msg++; |
| 1797 | msglen--; |
| 1798 | } |
| 1799 | for (i = 0; i < NAME_MAX255; i++) { |
| 1800 | if (!isalnum((unsigned char)msg[i]) && |
| 1801 | msg[i] != '-' && msg[i] != '.' && msg[i] != '_') |
| 1802 | break; |
| 1803 | prog[i] = msg[i]; |
| 1804 | } |
| 1805 | prog[i] = 0; |
| 1806 | |
| 1807 | /* log the message to the particular outputs */ |
| 1808 | if (!Initialized) { |
| 1809 | f = &consfile; |
| 1810 | if (f->f_type == F_CONSOLE3) { |
| 1811 | strlcpy(f->f_lasttime, timestamp, |
| 1812 | sizeof(f->f_lasttime)); |
| 1813 | strlcpy(f->f_prevhost, from, |
| 1814 | sizeof(f->f_prevhost)); |
| 1815 | fprintlog(f, flags, msg); |
| 1816 | /* May be set to F_UNUSED, try again next time. */ |
| 1817 | f->f_type = F_CONSOLE3; |
| 1818 | } |
| 1819 | init_dropped++; |
| 1820 | return; |
| 1821 | } |
| 1822 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void*)0); (f ) = ((f)->f_next.sqe_next)) { |
| 1823 | /* skip messages that are incorrect priority */ |
| 1824 | if (f->f_pmask[fac] < prilev || |
| 1825 | f->f_pmask[fac] == INTERNAL_NOPRI0x10) |
| 1826 | continue; |
| 1827 | |
| 1828 | /* skip messages with the incorrect program or hostname */ |
| 1829 | if (f->f_program && fnmatch(f->f_program, prog, 0) != 0) |
| 1830 | continue; |
| 1831 | if (f->f_hostname && fnmatch(f->f_hostname, from, 0) != 0) |
| 1832 | continue; |
| 1833 | |
| 1834 | if (f->f_type == F_CONSOLE3 && (flags & IGN_CONS0x001)) |
| 1835 | continue; |
| 1836 | |
| 1837 | /* don't output marks to recently written files */ |
| 1838 | if ((flags & MARK0x008) && |
| 1839 | (now.tv_sec - f->f_time) < MarkInterval / 2) |
| 1840 | continue; |
| 1841 | |
| 1842 | /* |
| 1843 | * suppress duplicate lines to this file |
| 1844 | */ |
| 1845 | if ((Repeat == 0 || (Repeat == 1 && |
| 1846 | (f->f_type != F_PIPE8 && f->f_type != F_FORWUDP4 && |
| 1847 | f->f_type != F_FORWTCP9 && f->f_type != F_FORWTLS10))) && |
| 1848 | (flags & MARK0x008) == 0 && msglen == f->f_prevlen && |
| 1849 | !strcmp(msg, f->f_prevline) && |
| 1850 | !strcmp(from, f->f_prevhost)) { |
| 1851 | strlcpy(f->f_lasttime, timestamp, |
| 1852 | sizeof(f->f_lasttime)); |
| 1853 | f->f_prevcount++; |
| 1854 | log_debug("msg repeated %d times, %ld sec of %d", |
| 1855 | f->f_prevcount, (long)(now.tv_sec - f->f_time), |
| 1856 | repeatinterval[f->f_repeatcount]); |
| 1857 | /* |
| 1858 | * If domark would have logged this by now, |
| 1859 | * flush it now (so we don't hold isolated messages), |
| 1860 | * but back off so we'll flush less often |
| 1861 | * in the future. |
| 1862 | */ |
| 1863 | if (now.tv_sec > REPEATTIME(f)((f)->f_time + repeatinterval[(f)->f_repeatcount])) { |
| 1864 | fprintlog(f, flags, (char *)NULL((void*)0)); |
| 1865 | BACKOFF(f){ if (++(f)->f_repeatcount > ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)) (f)->f_repeatcount = ((sizeof (repeatinterval) / sizeof(repeatinterval[0])) - 1); }; |
| 1866 | } |
| 1867 | } else { |
| 1868 | /* new line, save it */ |
| 1869 | if (f->f_prevcount) |
| 1870 | fprintlog(f, 0, (char *)NULL((void*)0)); |
| 1871 | f->f_repeatcount = 0; |
| 1872 | f->f_prevpri = pri; |
| 1873 | strlcpy(f->f_lasttime, timestamp, |
| 1874 | sizeof(f->f_lasttime)); |
| 1875 | strlcpy(f->f_prevhost, from, |
| 1876 | sizeof(f->f_prevhost)); |
| 1877 | if (msglen < MAXSVLINE120) { |
| 1878 | f->f_prevlen = msglen; |
| 1879 | strlcpy(f->f_prevline, msg, |
| 1880 | sizeof(f->f_prevline)); |
| 1881 | fprintlog(f, flags, (char *)NULL((void*)0)); |
| 1882 | } else { |
| 1883 | f->f_prevline[0] = 0; |
| 1884 | f->f_prevlen = 0; |
| 1885 | fprintlog(f, flags, msg); |
| 1886 | } |
| 1887 | } |
| 1888 | |
| 1889 | if (f->f_quick) |
| 1890 | break; |
| 1891 | } |
| 1892 | } |
| 1893 | |
| 1894 | void |
| 1895 | fprintlog(struct filed *f, int flags, char *msg) |
| 1896 | { |
| 1897 | struct iovec iov[IOVCNT7], *v; |
| 1898 | struct msghdr msghdr; |
| 1899 | int l, retryonce; |
| 1900 | char line[LOG_MAXLINE8192 + 1], pribuf[13], greetings[500], repbuf[80]; |
| 1901 | char ebuf[ERRBUFSIZE256]; |
| 1902 | |
| 1903 | v = iov; |
| 1904 | switch (f->f_type) { |
| 1905 | case F_FORWUDP4: |
| 1906 | case F_FORWTCP9: |
| 1907 | case F_FORWTLS10: |
| 1908 | l = snprintf(pribuf, sizeof(pribuf), "<%d>", f->f_prevpri); |
| 1909 | if (l < 0) |
| 1910 | l = strlcpy(pribuf, "<13>", sizeof(pribuf)); |
| 1911 | if (l >= sizeof(pribuf)) |
| 1912 | l = sizeof(pribuf) - 1; |
| 1913 | v->iov_base = pribuf; |
| 1914 | v->iov_len = l; |
| 1915 | break; |
| 1916 | case F_WALL6: |
| 1917 | l = snprintf(greetings, sizeof(greetings), |
| 1918 | "\r\n\7Message from syslogd@%s at %.24s ...\r\n", |
| 1919 | f->f_prevhost, ctime(&now.tv_sec)); |
| 1920 | if (l < 0) |
| 1921 | l = strlcpy(greetings, |
| 1922 | "\r\n\7Message from syslogd ...\r\n", |
| 1923 | sizeof(greetings)); |
| 1924 | if (l >= sizeof(greetings)) |
| 1925 | l = sizeof(greetings) - 1; |
| 1926 | v->iov_base = greetings; |
| 1927 | v->iov_len = l; |
| 1928 | break; |
| 1929 | default: |
| 1930 | v->iov_base = ""; |
| 1931 | v->iov_len = 0; |
| 1932 | break; |
| 1933 | } |
| 1934 | v++; |
| 1935 | |
| 1936 | if (f->f_lasttime[0] != '\0') { |
| 1937 | v->iov_base = f->f_lasttime; |
| 1938 | v->iov_len = strlen(f->f_lasttime); |
| 1939 | v++; |
| 1940 | v->iov_base = " "; |
| 1941 | v->iov_len = 1; |
| 1942 | } else { |
| 1943 | v->iov_base = ""; |
| 1944 | v->iov_len = 0; |
| 1945 | v++; |
| 1946 | v->iov_base = ""; |
| 1947 | v->iov_len = 0; |
| 1948 | } |
| 1949 | v++; |
| 1950 | |
| 1951 | switch (f->f_type) { |
| 1952 | case F_FORWUDP4: |
| 1953 | case F_FORWTCP9: |
| 1954 | case F_FORWTLS10: |
| 1955 | if (IncludeHostname) { |
| 1956 | v->iov_base = LocalHostName; |
| 1957 | v->iov_len = strlen(LocalHostName); |
| 1958 | v++; |
| 1959 | v->iov_base = " "; |
| 1960 | v->iov_len = 1; |
| 1961 | } else { |
| 1962 | /* XXX RFC requires to include host name */ |
| 1963 | v->iov_base = ""; |
| 1964 | v->iov_len = 0; |
| 1965 | v++; |
| 1966 | v->iov_base = ""; |
| 1967 | v->iov_len = 0; |
| 1968 | } |
| 1969 | break; |
| 1970 | default: |
| 1971 | if (f->f_prevhost[0] != '\0') { |
| 1972 | v->iov_base = f->f_prevhost; |
| 1973 | v->iov_len = strlen(v->iov_base); |
| 1974 | v++; |
| 1975 | v->iov_base = " "; |
| 1976 | v->iov_len = 1; |
| 1977 | } else { |
| 1978 | v->iov_base = ""; |
| 1979 | v->iov_len = 0; |
| 1980 | v++; |
| 1981 | v->iov_base = ""; |
| 1982 | v->iov_len = 0; |
| 1983 | } |
| 1984 | break; |
| 1985 | } |
| 1986 | v++; |
| 1987 | |
| 1988 | if (msg) { |
| 1989 | v->iov_base = msg; |
| 1990 | v->iov_len = strlen(msg); |
| 1991 | } else if (f->f_prevcount > 1) { |
| 1992 | l = snprintf(repbuf, sizeof(repbuf), |
| 1993 | "last message repeated %d times", f->f_prevcount); |
| 1994 | if (l < 0) |
| 1995 | l = strlcpy(repbuf, "last message repeated", |
| 1996 | sizeof(repbuf)); |
| 1997 | if (l >= sizeof(repbuf)) |
| 1998 | l = sizeof(repbuf) - 1; |
| 1999 | v->iov_base = repbuf; |
| 2000 | v->iov_len = l; |
| 2001 | } else { |
| 2002 | v->iov_base = f->f_prevline; |
| 2003 | v->iov_len = f->f_prevlen; |
| 2004 | } |
| 2005 | v++; |
| 2006 | |
| 2007 | switch (f->f_type) { |
| 2008 | case F_CONSOLE3: |
| 2009 | case F_TTY2: |
| 2010 | case F_USERS5: |
| 2011 | case F_WALL6: |
| 2012 | v->iov_base = "\r\n"; |
| 2013 | v->iov_len = 2; |
| 2014 | break; |
| 2015 | case F_FILE1: |
| 2016 | case F_PIPE8: |
| 2017 | case F_FORWTCP9: |
| 2018 | case F_FORWTLS10: |
| 2019 | v->iov_base = "\n"; |
| 2020 | v->iov_len = 1; |
| 2021 | break; |
| 2022 | default: |
| 2023 | v->iov_base = ""; |
| 2024 | v->iov_len = 0; |
| 2025 | break; |
| 2026 | } |
| 2027 | v = NULL((void*)0); |
| 2028 | |
| 2029 | log_debugadd("Logging to %s", TypeNames[f->f_type]); |
| 2030 | f->f_time = now.tv_sec; |
| 2031 | |
| 2032 | switch (f->f_type) { |
| 2033 | case F_UNUSED0: |
| 2034 | log_debug("%s", ""); |
| 2035 | break; |
| 2036 | |
| 2037 | case F_FORWUDP4: |
| 2038 | log_debug(" %s", f->f_un.f_forw.f_loghost); |
| 2039 | l = iov[0].iov_len + iov[1].iov_len + iov[2].iov_len + |
| 2040 | iov[3].iov_len + iov[4].iov_len + iov[5].iov_len + |
| 2041 | iov[6].iov_len; |
| 2042 | if (l > MAX_UDPMSG1180) { |
| 2043 | l -= MAX_UDPMSG1180; |
| 2044 | if (iov[5].iov_len > l) |
| 2045 | iov[5].iov_len -= l; |
| 2046 | else |
| 2047 | iov[5].iov_len = 0; |
| 2048 | } |
| 2049 | memset(&msghdr, 0, sizeof(msghdr)); |
| 2050 | msghdr.msg_name = &f->f_un.f_forw.f_addr; |
| 2051 | msghdr.msg_namelen = f->f_un.f_forw.f_addr.ss_len; |
| 2052 | msghdr.msg_iov = iov; |
| 2053 | msghdr.msg_iovlen = IOVCNT7; |
| 2054 | if (sendmsg(f->f_file, &msghdr, 0) == -1) { |
| 2055 | switch (errno(*__errno())) { |
| 2056 | case EADDRNOTAVAIL49: |
| 2057 | case EHOSTDOWN64: |
| 2058 | case EHOSTUNREACH65: |
| 2059 | case ENETDOWN50: |
| 2060 | case ENETUNREACH51: |
| 2061 | case ENOBUFS55: |
| 2062 | case EWOULDBLOCK35: |
| 2063 | /* silently dropped */ |
| 2064 | break; |
| 2065 | default: |
| 2066 | f->f_type = F_UNUSED0; |
| 2067 | log_warn("sendmsg to \"%s\"", |
| 2068 | f->f_un.f_forw.f_loghost); |
| 2069 | break; |
| 2070 | } |
| 2071 | } |
| 2072 | break; |
| 2073 | |
| 2074 | case F_FORWTCP9: |
| 2075 | case F_FORWTLS10: |
| 2076 | log_debugadd(" %s", f->f_un.f_forw.f_loghost); |
| 2077 | if (EVBUFFER_LENGTH(f->f_un.f_forw.f_bufev->output)(f->f_un.f_forw.f_bufev->output)->off >= |
| 2078 | MAX_TCPBUF(256 * 1024)) { |
| 2079 | log_debug(" (dropped)"); |
| 2080 | f->f_dropped++; |
| 2081 | break; |
| 2082 | } |
| 2083 | /* |
| 2084 | * Syslog over TLS RFC 5425 4.3. Sending Data |
| 2085 | * Syslog over TCP RFC 6587 3.4.1. Octet Counting |
| 2086 | * Use an additional '\n' to split messages. This allows |
| 2087 | * buffer synchronisation, helps legacy implementations, |
| 2088 | * and makes line based testing easier. |
| 2089 | */ |
| 2090 | l = evbuffer_add_printf(f->f_un.f_forw.f_bufev->output, |
| 2091 | "%zu %s%s%s%s%s%s%s", iov[0].iov_len + |
| 2092 | iov[1].iov_len + iov[2].iov_len + |
| 2093 | iov[3].iov_len + iov[4].iov_len + |
| 2094 | iov[5].iov_len + iov[6].iov_len, |
| 2095 | (char *)iov[0].iov_base, |
| 2096 | (char *)iov[1].iov_base, (char *)iov[2].iov_base, |
| 2097 | (char *)iov[3].iov_base, (char *)iov[4].iov_base, |
| 2098 | (char *)iov[5].iov_base, (char *)iov[6].iov_base); |
| 2099 | if (l < 0) { |
| 2100 | log_debug(" (dropped evbuffer_add_printf)"); |
| 2101 | f->f_dropped++; |
| 2102 | break; |
| 2103 | } |
| 2104 | bufferevent_enable(f->f_un.f_forw.f_bufev, EV_WRITE0x04); |
| 2105 | log_debug("%s", ""); |
| 2106 | break; |
| 2107 | |
| 2108 | case F_CONSOLE3: |
| 2109 | if (flags & IGN_CONS0x001) { |
| 2110 | log_debug(" (ignored)"); |
| 2111 | break; |
| 2112 | } |
| 2113 | /* FALLTHROUGH */ |
| 2114 | case F_TTY2: |
| 2115 | case F_FILE1: |
| 2116 | case F_PIPE8: |
| 2117 | log_debug(" %s", f->f_un.f_fname); |
| 2118 | retryonce = 0; |
| 2119 | again: |
| 2120 | if (writev(f->f_file, iov, IOVCNT7) == -1) { |
| 2121 | int e = errno(*__errno()); |
| 2122 | |
| 2123 | /* allow to recover from file system full */ |
| 2124 | if (e == ENOSPC28 && f->f_type == F_FILE1) { |
| 2125 | if (f->f_dropped++ == 0) { |
| 2126 | f->f_type = F_UNUSED0; |
| 2127 | errno(*__errno()) = e; |
| 2128 | log_warn("write to file \"%s\"", |
| 2129 | f->f_un.f_fname); |
| 2130 | f->f_type = F_FILE1; |
| 2131 | } |
| 2132 | break; |
| 2133 | } |
| 2134 | |
| 2135 | /* pipe is non-blocking. log and drop message if full */ |
| 2136 | if (e == EAGAIN35 && f->f_type == F_PIPE8) { |
| 2137 | if (now.tv_sec - f->f_lasterrtime > 120) { |
| 2138 | f->f_lasterrtime = now.tv_sec; |
| 2139 | log_warn("write to pipe \"%s\"", |
| 2140 | f->f_un.f_fname); |
| 2141 | } |
| 2142 | break; |
| 2143 | } |
| 2144 | |
| 2145 | /* |
| 2146 | * Check for errors on TTY's or program pipes. |
| 2147 | * Errors happen due to loss of tty or died programs. |
| 2148 | */ |
| 2149 | if (e == EAGAIN35) { |
| 2150 | /* |
| 2151 | * Silently drop messages on blocked write. |
| 2152 | * This can happen when logging to a locked tty. |
| 2153 | */ |
| 2154 | break; |
| 2155 | } |
| 2156 | |
| 2157 | (void)close(f->f_file); |
| 2158 | if ((e == EIO5 || e == EBADF9) && |
| 2159 | f->f_type != F_FILE1 && f->f_type != F_PIPE8 && |
| 2160 | !retryonce) { |
| 2161 | f->f_file = priv_open_tty(f->f_un.f_fname); |
| 2162 | retryonce = 1; |
| 2163 | if (f->f_file < 0) { |
| 2164 | f->f_type = F_UNUSED0; |
| 2165 | log_warn("priv_open_tty \"%s\"", |
| 2166 | f->f_un.f_fname); |
| 2167 | } else |
| 2168 | goto again; |
| 2169 | } else if ((e == EPIPE32 || e == EBADF9) && |
| 2170 | f->f_type == F_PIPE8 && !retryonce) { |
| 2171 | f->f_file = priv_open_log(f->f_un.f_fname); |
| 2172 | retryonce = 1; |
| 2173 | if (f->f_file < 0) { |
| 2174 | f->f_type = F_UNUSED0; |
| 2175 | log_warn("priv_open_log \"%s\"", |
| 2176 | f->f_un.f_fname); |
| 2177 | } else |
| 2178 | goto again; |
| 2179 | } else { |
| 2180 | f->f_type = F_UNUSED0; |
| 2181 | f->f_file = -1; |
| 2182 | errno(*__errno()) = e; |
| 2183 | log_warn("writev \"%s\"", f->f_un.f_fname); |
| 2184 | } |
| 2185 | } else { |
| 2186 | if (flags & SYNC_FILE0x002) |
| 2187 | (void)fsync(f->f_file); |
| 2188 | if (f->f_dropped && f->f_type == F_FILE1) { |
| 2189 | snprintf(ebuf, sizeof(ebuf), "to file \"%s\"", |
| 2190 | f->f_un.f_fname); |
| 2191 | dropped_warn(&f->f_dropped, ebuf); |
| 2192 | } |
| 2193 | } |
| 2194 | break; |
| 2195 | |
| 2196 | case F_USERS5: |
| 2197 | case F_WALL6: |
| 2198 | log_debug("%s", ""); |
| 2199 | wallmsg(f, iov); |
| 2200 | break; |
| 2201 | |
| 2202 | case F_MEMBUF7: |
| 2203 | log_debug("%s", ""); |
| 2204 | l = snprintf(line, sizeof(line), |
| 2205 | "%s%s%s%s%s%s%s", (char *)iov[0].iov_base, |
| 2206 | (char *)iov[1].iov_base, (char *)iov[2].iov_base, |
| 2207 | (char *)iov[3].iov_base, (char *)iov[4].iov_base, |
| 2208 | (char *)iov[5].iov_base, (char *)iov[6].iov_base); |
| 2209 | if (l < 0) |
| 2210 | l = strlcpy(line, iov[5].iov_base, sizeof(line)); |
Value stored to 'l' is never read | |
| 2211 | if (ringbuf_append_line(f->f_un.f_mb.f_rb, line) == 1) |
| 2212 | f->f_un.f_mb.f_overflow = 1; |
| 2213 | if (f->f_un.f_mb.f_attached) |
| 2214 | ctlconn_logto(line); |
| 2215 | break; |
| 2216 | } |
| 2217 | f->f_prevcount = 0; |
| 2218 | } |
| 2219 | |
| 2220 | /* |
| 2221 | * WALLMSG -- Write a message to the world at large |
| 2222 | * |
| 2223 | * Write the specified message to either the entire |
| 2224 | * world, or a list of approved users. |
| 2225 | */ |
| 2226 | void |
| 2227 | wallmsg(struct filed *f, struct iovec *iov) |
| 2228 | { |
| 2229 | struct utmp ut; |
| 2230 | char utline[sizeof(ut.ut_line) + 1]; |
| 2231 | static int reenter; /* avoid calling ourselves */ |
| 2232 | FILE *uf; |
| 2233 | int i; |
| 2234 | |
| 2235 | if (reenter++) |
| 2236 | return; |
| 2237 | if ((uf = priv_open_utmp()) == NULL((void*)0)) { |
| 2238 | log_warn("priv_open_utmp"); |
| 2239 | reenter = 0; |
| 2240 | return; |
| 2241 | } |
| 2242 | while (fread(&ut, sizeof(ut), 1, uf) == 1) { |
| 2243 | if (ut.ut_name[0] == '\0') |
| 2244 | continue; |
| 2245 | /* must use strncpy since ut_* may not be NUL terminated */ |
| 2246 | strncpy(utline, ut.ut_line, sizeof(utline) - 1); |
| 2247 | utline[sizeof(utline) - 1] = '\0'; |
| 2248 | if (f->f_type == F_WALL6) { |
| 2249 | ttymsg(utline, iov); |
| 2250 | continue; |
| 2251 | } |
| 2252 | /* should we send the message to this user? */ |
| 2253 | for (i = 0; i < MAXUNAMES20; i++) { |
| 2254 | if (!f->f_un.f_uname[i][0]) |
| 2255 | break; |
| 2256 | if (!strncmp(f->f_un.f_uname[i], ut.ut_name, |
| 2257 | UT_NAMESIZE32)) { |
| 2258 | ttymsg(utline, iov); |
| 2259 | break; |
| 2260 | } |
| 2261 | } |
| 2262 | } |
| 2263 | (void)fclose(uf); |
| 2264 | reenter = 0; |
| 2265 | } |
| 2266 | |
| 2267 | /* |
| 2268 | * Return a printable representation of a host address. |
| 2269 | */ |
| 2270 | void |
| 2271 | cvthname(struct sockaddr *f, char *result, size_t res_len) |
| 2272 | { |
| 2273 | if (getnameinfo(f, f->sa_len, result, res_len, NULL((void*)0), 0, |
| 2274 | NI_NUMERICHOST1|NI_NUMERICSERV2|NI_DGRAM16) != 0) { |
| 2275 | log_debug("Malformed from address"); |
| 2276 | strlcpy(result, hostname_unknown, res_len); |
| 2277 | return; |
| 2278 | } |
| 2279 | log_debug("cvthname(%s)", result); |
| 2280 | if (NoDNS) |
| 2281 | return; |
| 2282 | |
| 2283 | if (priv_getnameinfo(f, f->sa_len, result, res_len) != 0) |
| 2284 | log_debug("Host name for from address (%s) unknown", result); |
| 2285 | } |
| 2286 | |
| 2287 | void |
| 2288 | die_signalcb(int signum, short event, void *arg) |
| 2289 | { |
| 2290 | die(signum); |
| 2291 | } |
| 2292 | |
| 2293 | void |
| 2294 | mark_timercb(int unused, short event, void *arg) |
| 2295 | { |
| 2296 | struct event *ev = arg; |
| 2297 | struct timeval to; |
| 2298 | |
| 2299 | markit(); |
| 2300 | |
| 2301 | to.tv_sec = TIMERINTVL30; |
| 2302 | to.tv_usec = 0; |
| 2303 | evtimer_add(ev, &to)event_add(ev, &to); |
| 2304 | } |
| 2305 | |
| 2306 | void |
| 2307 | init_signalcb(int signum, short event, void *arg) |
| 2308 | { |
| 2309 | init(); |
| 2310 | log_info(LOG_INFO6, "restart"); |
| 2311 | |
| 2312 | dropped_warn(&file_dropped, "to file"); |
| 2313 | dropped_warn(&tcpbuf_dropped, "to remote loghost"); |
| 2314 | log_debug("syslogd: restarted"); |
| 2315 | } |
| 2316 | |
| 2317 | void |
| 2318 | logevent(int severity, const char *msg) |
| 2319 | { |
| 2320 | log_debug("libevent: [%d] %s", severity, msg); |
| 2321 | } |
| 2322 | |
| 2323 | void |
| 2324 | dropped_warn(int *count, const char *what) |
| 2325 | { |
| 2326 | int dropped; |
| 2327 | |
| 2328 | if (*count == 0) |
| 2329 | return; |
| 2330 | |
| 2331 | dropped = *count; |
| 2332 | *count = 0; |
| 2333 | log_info(LOG_WARNING4, "dropped %d message%s %s", |
| 2334 | dropped, dropped == 1 ? "" : "s", what); |
| 2335 | } |
| 2336 | |
| 2337 | __dead__attribute__((__noreturn__)) void |
| 2338 | die(int signo) |
| 2339 | { |
| 2340 | struct filed *f; |
| 2341 | |
| 2342 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void*)0); (f ) = ((f)->f_next.sqe_next)) { |
| 2343 | /* flush any pending output */ |
| 2344 | if (f->f_prevcount) |
| 2345 | fprintlog(f, 0, (char *)NULL((void*)0)); |
| 2346 | if (f->f_type == F_FORWTLS10 || f->f_type == F_FORWTCP9) { |
| 2347 | tcpbuf_dropped += f->f_dropped + |
| 2348 | tcpbuf_countmsg(f->f_un.f_forw.f_bufev); |
| 2349 | f->f_dropped = 0; |
| 2350 | } |
| 2351 | if (f->f_type == F_FILE1) { |
| 2352 | file_dropped += f->f_dropped; |
| 2353 | f->f_dropped = 0; |
| 2354 | } |
| 2355 | } |
| 2356 | dropped_warn(&init_dropped, "during initialization"); |
| 2357 | dropped_warn(&file_dropped, "to file"); |
| 2358 | dropped_warn(&tcpbuf_dropped, "to remote loghost"); |
| 2359 | |
| 2360 | if (signo) |
| 2361 | log_info(LOG_ERR3, "exiting on signal %d", signo); |
| 2362 | log_debug("syslogd: exited"); |
| 2363 | exit(0); |
| 2364 | } |
| 2365 | |
| 2366 | /* |
| 2367 | * INIT -- Initialize syslogd from configuration table |
| 2368 | */ |
| 2369 | void |
| 2370 | init(void) |
| 2371 | { |
| 2372 | char progblock[NAME_MAX255+1], hostblock[NAME_MAX255+1], *cline, *p, *q; |
| 2373 | struct filed_list mb; |
| 2374 | struct filed *f, *m; |
| 2375 | FILE *cf; |
| 2376 | int i; |
| 2377 | size_t s; |
| 2378 | |
| 2379 | log_debug("init"); |
| 2380 | |
| 2381 | /* If config file has been modified, then just die to restart */ |
| 2382 | if (priv_config_modified()) { |
| 2383 | log_debug("config file changed: dying"); |
| 2384 | die(0); |
| 2385 | } |
| 2386 | |
| 2387 | /* |
| 2388 | * Close all open log files. |
| 2389 | */ |
| 2390 | Initialized = 0; |
| 2391 | SIMPLEQ_INIT(&mb)do { (&mb)->sqh_first = ((void*)0); (&mb)->sqh_last = &(&mb)->sqh_first; } while (0); |
| 2392 | while (!SIMPLEQ_EMPTY(&Files)(((&Files)->sqh_first) == ((void*)0))) { |
| 2393 | f = SIMPLEQ_FIRST(&Files)((&Files)->sqh_first); |
| 2394 | SIMPLEQ_REMOVE_HEAD(&Files, f_next)do { if (((&Files)->sqh_first = (&Files)->sqh_first ->f_next.sqe_next) == ((void*)0)) (&Files)->sqh_last = &(&Files)->sqh_first; } while (0); |
| 2395 | /* flush any pending output */ |
| 2396 | if (f->f_prevcount) |
| 2397 | fprintlog(f, 0, (char *)NULL((void*)0)); |
| 2398 | |
| 2399 | switch (f->f_type) { |
| 2400 | case F_FORWTLS10: |
| 2401 | if (f->f_un.f_forw.f_ctx) { |
| 2402 | tls_close(f->f_un.f_forw.f_ctx); |
| 2403 | tls_free(f->f_un.f_forw.f_ctx); |
| 2404 | } |
| 2405 | free(f->f_un.f_forw.f_host); |
| 2406 | /* FALLTHROUGH */ |
| 2407 | case F_FORWTCP9: |
| 2408 | tcpbuf_dropped += f->f_dropped + |
| 2409 | tcpbuf_countmsg(f->f_un.f_forw.f_bufev); |
| 2410 | bufferevent_free(f->f_un.f_forw.f_bufev); |
| 2411 | /* FALLTHROUGH */ |
| 2412 | case F_FILE1: |
| 2413 | if (f->f_type == F_FILE1) { |
| 2414 | file_dropped += f->f_dropped; |
| 2415 | f->f_dropped = 0; |
| 2416 | } |
| 2417 | case F_TTY2: |
| 2418 | case F_CONSOLE3: |
| 2419 | case F_PIPE8: |
| 2420 | (void)close(f->f_file); |
| 2421 | break; |
| 2422 | } |
| 2423 | free(f->f_program); |
| 2424 | free(f->f_hostname); |
| 2425 | if (f->f_type == F_MEMBUF7) { |
| 2426 | f->f_program = NULL((void*)0); |
| 2427 | f->f_hostname = NULL((void*)0); |
| 2428 | log_debug("add %p to mb", f); |
| 2429 | SIMPLEQ_INSERT_HEAD(&mb, f, f_next)do { if (((f)->f_next.sqe_next = (&mb)->sqh_first) == ((void*)0)) (&mb)->sqh_last = &(f)->f_next.sqe_next ; (&mb)->sqh_first = (f); } while (0); |
| 2430 | } else |
| 2431 | free(f); |
| 2432 | } |
| 2433 | SIMPLEQ_INIT(&Files)do { (&Files)->sqh_first = ((void*)0); (&Files)-> sqh_last = &(&Files)->sqh_first; } while (0); |
| 2434 | |
| 2435 | /* open the configuration file */ |
| 2436 | if ((cf = priv_open_config()) == NULL((void*)0)) { |
| 2437 | log_debug("cannot open %s", ConfFile); |
| 2438 | SIMPLEQ_INSERT_TAIL(&Files,do { (cfline("*.ERR\t/dev/console", "*", "*"))->f_next.sqe_next = ((void*)0); *(&Files)->sqh_last = (cfline("*.ERR\t/dev/console" , "*", "*")); (&Files)->sqh_last = &(cfline("*.ERR\t/dev/console" , "*", "*"))->f_next.sqe_next; } while (0) |
| 2439 | cfline("*.ERR\t/dev/console", "*", "*"), f_next)do { (cfline("*.ERR\t/dev/console", "*", "*"))->f_next.sqe_next = ((void*)0); *(&Files)->sqh_last = (cfline("*.ERR\t/dev/console" , "*", "*")); (&Files)->sqh_last = &(cfline("*.ERR\t/dev/console" , "*", "*"))->f_next.sqe_next; } while (0); |
| 2440 | SIMPLEQ_INSERT_TAIL(&Files,do { (cfline("*.PANIC\t*", "*", "*"))->f_next.sqe_next = ( (void*)0); *(&Files)->sqh_last = (cfline("*.PANIC\t*", "*", "*")); (&Files)->sqh_last = &(cfline("*.PANIC\t*" , "*", "*"))->f_next.sqe_next; } while (0) |
| 2441 | cfline("*.PANIC\t*", "*", "*"), f_next)do { (cfline("*.PANIC\t*", "*", "*"))->f_next.sqe_next = ( (void*)0); *(&Files)->sqh_last = (cfline("*.PANIC\t*", "*", "*")); (&Files)->sqh_last = &(cfline("*.PANIC\t*" , "*", "*"))->f_next.sqe_next; } while (0); |
| 2442 | Initialized = 1; |
| 2443 | dropped_warn(&init_dropped, "during initialization"); |
| 2444 | return; |
| 2445 | } |
| 2446 | |
| 2447 | /* |
| 2448 | * Foreach line in the conf table, open that file. |
| 2449 | */ |
| 2450 | cline = NULL((void*)0); |
| 2451 | s = 0; |
| 2452 | strlcpy(progblock, "*", sizeof(progblock)); |
| 2453 | strlcpy(hostblock, "*", sizeof(hostblock)); |
| 2454 | send_udp = send_udp6 = 0; |
| 2455 | while (getline(&cline, &s, cf) != -1) { |
| 2456 | /* |
| 2457 | * check for end-of-section, comments, strip off trailing |
| 2458 | * spaces and newline character. !progblock and +hostblock |
| 2459 | * are treated specially: the following lines apply only to |
| 2460 | * that program. |
| 2461 | */ |
| 2462 | for (p = cline; isspace((unsigned char)*p); ++p) |
| 2463 | continue; |
| 2464 | if (*p == '\0' || *p == '#') |
| 2465 | continue; |
| 2466 | if (*p == '!' || *p == '+') { |
| 2467 | q = (*p == '!') ? progblock : hostblock; |
| 2468 | p++; |
| 2469 | while (isspace((unsigned char)*p)) |
| 2470 | p++; |
| 2471 | if (*p == '\0' || (*p == '*' && (p[1] == '\0' || |
| 2472 | isspace((unsigned char)p[1])))) { |
| 2473 | strlcpy(q, "*", NAME_MAX255+1); |
| 2474 | continue; |
| 2475 | } |
| 2476 | for (i = 0; i < NAME_MAX255; i++) { |
| 2477 | if (*p == '\0' || isspace((unsigned char)*p)) |
| 2478 | break; |
| 2479 | *q++ = *p++; |
| 2480 | } |
| 2481 | *q = '\0'; |
| 2482 | continue; |
| 2483 | } |
| 2484 | |
| 2485 | p = cline + strlen(cline); |
| 2486 | while (p > cline) |
| 2487 | if (!isspace((unsigned char)*--p)) { |
| 2488 | p++; |
| 2489 | break; |
| 2490 | } |
| 2491 | *p = '\0'; |
| 2492 | f = cfline(cline, progblock, hostblock); |
| 2493 | if (f != NULL((void*)0)) |
| 2494 | SIMPLEQ_INSERT_TAIL(&Files, f, f_next)do { (f)->f_next.sqe_next = ((void*)0); *(&Files)-> sqh_last = (f); (&Files)->sqh_last = &(f)->f_next .sqe_next; } while (0); |
| 2495 | } |
| 2496 | free(cline); |
| 2497 | if (!feof(cf)(!__isthreaded ? (((cf)->_flags & 0x0020) != 0) : (feof )(cf))) |
| 2498 | fatal("read config file"); |
| 2499 | |
| 2500 | /* Match and initialize the memory buffers */ |
| 2501 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void*)0); (f ) = ((f)->f_next.sqe_next)) { |
| 2502 | if (f->f_type != F_MEMBUF7) |
| 2503 | continue; |
| 2504 | log_debug("Initialize membuf %s at %p", |
| 2505 | f->f_un.f_mb.f_mname, f); |
| 2506 | |
| 2507 | SIMPLEQ_FOREACH(m, &mb, f_next)for((m) = ((&mb)->sqh_first); (m) != ((void*)0); (m) = ((m)->f_next.sqe_next)) { |
| 2508 | if (m->f_un.f_mb.f_rb == NULL((void*)0)) |
| 2509 | continue; |
| 2510 | if (strcmp(m->f_un.f_mb.f_mname, |
| 2511 | f->f_un.f_mb.f_mname) == 0) |
| 2512 | break; |
| 2513 | } |
| 2514 | if (m == NULL((void*)0)) { |
| 2515 | log_debug("Membuf no match"); |
| 2516 | f->f_un.f_mb.f_rb = ringbuf_init(f->f_un.f_mb.f_len); |
| 2517 | if (f->f_un.f_mb.f_rb == NULL((void*)0)) { |
| 2518 | f->f_type = F_UNUSED0; |
| 2519 | log_warn("allocate membuf"); |
| 2520 | } |
| 2521 | } else { |
| 2522 | log_debug("Membuf match f:%p, m:%p", f, m); |
| 2523 | f->f_un = m->f_un; |
| 2524 | m->f_un.f_mb.f_rb = NULL((void*)0); |
| 2525 | } |
| 2526 | } |
| 2527 | |
| 2528 | /* make sure remaining buffers are freed */ |
| 2529 | while (!SIMPLEQ_EMPTY(&mb)(((&mb)->sqh_first) == ((void*)0))) { |
| 2530 | m = SIMPLEQ_FIRST(&mb)((&mb)->sqh_first); |
| 2531 | SIMPLEQ_REMOVE_HEAD(&mb, f_next)do { if (((&mb)->sqh_first = (&mb)->sqh_first-> f_next.sqe_next) == ((void*)0)) (&mb)->sqh_last = & (&mb)->sqh_first; } while (0); |
| 2532 | if (m->f_un.f_mb.f_rb != NULL((void*)0)) { |
| 2533 | log_warnx("mismatched membuf"); |
| 2534 | ringbuf_free(m->f_un.f_mb.f_rb); |
| 2535 | } |
| 2536 | log_debug("Freeing membuf %p", m); |
| 2537 | |
| 2538 | free(m); |
| 2539 | } |
| 2540 | |
| 2541 | /* close the configuration file */ |
| 2542 | (void)fclose(cf); |
| 2543 | |
| 2544 | Initialized = 1; |
| 2545 | dropped_warn(&init_dropped, "during initialization"); |
| 2546 | |
| 2547 | if (SecureMode) { |
| 2548 | /* |
| 2549 | * If generic UDP file descriptors are used neither |
| 2550 | * for receiving nor for sending, close them. Then |
| 2551 | * there is no useless *.514 in netstat. |
| 2552 | */ |
| 2553 | if (fd_udp != -1 && !send_udp) { |
| 2554 | close(fd_udp); |
| 2555 | fd_udp = -1; |
| 2556 | } |
| 2557 | if (fd_udp6 != -1 && !send_udp6) { |
| 2558 | close(fd_udp6); |
| 2559 | fd_udp6 = -1; |
| 2560 | } |
| 2561 | } |
| 2562 | |
| 2563 | if (Debug) { |
| 2564 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void*)0); (f ) = ((f)->f_next.sqe_next)) { |
| 2565 | for (i = 0; i <= LOG_NFACILITIES24; i++) |
| 2566 | if (f->f_pmask[i] == INTERNAL_NOPRI0x10) |
| 2567 | printf("X "); |
| 2568 | else |
| 2569 | printf("%d ", f->f_pmask[i]); |
| 2570 | printf("%s: ", TypeNames[f->f_type]); |
| 2571 | switch (f->f_type) { |
| 2572 | case F_FILE1: |
| 2573 | case F_TTY2: |
| 2574 | case F_CONSOLE3: |
| 2575 | case F_PIPE8: |
| 2576 | printf("%s", f->f_un.f_fname); |
| 2577 | break; |
| 2578 | |
| 2579 | case F_FORWUDP4: |
| 2580 | case F_FORWTCP9: |
| 2581 | case F_FORWTLS10: |
| 2582 | printf("%s", f->f_un.f_forw.f_loghost); |
| 2583 | break; |
| 2584 | |
| 2585 | case F_USERS5: |
| 2586 | for (i = 0; i < MAXUNAMES20 && |
| 2587 | *f->f_un.f_uname[i]; i++) |
| 2588 | printf("%s, ", f->f_un.f_uname[i]); |
| 2589 | break; |
| 2590 | |
| 2591 | case F_MEMBUF7: |
| 2592 | printf("%s", f->f_un.f_mb.f_mname); |
| 2593 | break; |
| 2594 | |
| 2595 | } |
| 2596 | if (f->f_program || f->f_hostname) |
| 2597 | printf(" (%s, %s)", |
| 2598 | f->f_program ? f->f_program : "*", |
| 2599 | f->f_hostname ? f->f_hostname : "*"); |
| 2600 | printf("\n"); |
| 2601 | } |
| 2602 | } |
| 2603 | } |
| 2604 | |
| 2605 | #define progmatches(p1, p2)(p1 == p2 || (p1 != ((void*)0) && p2 != ((void*)0) && strcmp(p1, p2) == 0)) \ |
| 2606 | (p1 == p2 || (p1 != NULL((void*)0) && p2 != NULL((void*)0) && strcmp(p1, p2) == 0)) |
| 2607 | |
| 2608 | /* |
| 2609 | * Spot a line with a duplicate file, pipe, console, tty, or membuf target. |
| 2610 | */ |
| 2611 | struct filed * |
| 2612 | find_dup(struct filed *f) |
| 2613 | { |
| 2614 | struct filed *list; |
| 2615 | |
| 2616 | SIMPLEQ_FOREACH(list, &Files, f_next)for((list) = ((&Files)->sqh_first); (list) != ((void*) 0); (list) = ((list)->f_next.sqe_next)) { |
| 2617 | if (list->f_quick || f->f_quick) |
| 2618 | continue; |
| 2619 | switch (list->f_type) { |
| 2620 | case F_FILE1: |
| 2621 | case F_TTY2: |
| 2622 | case F_CONSOLE3: |
| 2623 | case F_PIPE8: |
| 2624 | if (strcmp(list->f_un.f_fname, f->f_un.f_fname) == 0 && |
| 2625 | progmatches(list->f_program, f->f_program)(list->f_program == f->f_program || (list->f_program != ((void*)0) && f->f_program != ((void*)0) && strcmp(list->f_program, f->f_program) == 0)) && |
| 2626 | progmatches(list->f_hostname, f->f_hostname)(list->f_hostname == f->f_hostname || (list->f_hostname != ((void*)0) && f->f_hostname != ((void*)0) && strcmp(list->f_hostname, f->f_hostname) == 0))) { |
| 2627 | log_debug("duplicate %s", f->f_un.f_fname); |
| 2628 | return (list); |
| 2629 | } |
| 2630 | break; |
| 2631 | case F_MEMBUF7: |
| 2632 | if (strcmp(list->f_un.f_mb.f_mname, |
| 2633 | f->f_un.f_mb.f_mname) == 0 && |
| 2634 | progmatches(list->f_program, f->f_program)(list->f_program == f->f_program || (list->f_program != ((void*)0) && f->f_program != ((void*)0) && strcmp(list->f_program, f->f_program) == 0)) && |
| 2635 | progmatches(list->f_hostname, f->f_hostname)(list->f_hostname == f->f_hostname || (list->f_hostname != ((void*)0) && f->f_hostname != ((void*)0) && strcmp(list->f_hostname, f->f_hostname) == 0))) { |
| 2636 | log_debug("duplicate membuf %s", |
| 2637 | f->f_un.f_mb.f_mname); |
| 2638 | return (list); |
| 2639 | } |
| 2640 | break; |
| 2641 | } |
| 2642 | } |
| 2643 | return (NULL((void*)0)); |
| 2644 | } |
| 2645 | |
| 2646 | /* |
| 2647 | * Crack a configuration file line |
| 2648 | */ |
| 2649 | struct filed * |
| 2650 | cfline(char *line, char *progblock, char *hostblock) |
| 2651 | { |
| 2652 | int i, pri; |
| 2653 | size_t rb_len; |
| 2654 | char *bp, *p, *q, *proto, *host, *port, *ipproto; |
| 2655 | char buf[LOG_MAXLINE8192]; |
| 2656 | struct filed *xf, *f, *d; |
| 2657 | struct timeval to; |
| 2658 | |
| 2659 | log_debug("cfline(\"%s\", f, \"%s\", \"%s\")", |
| 2660 | line, progblock, hostblock); |
| 2661 | |
| 2662 | if ((f = calloc(1, sizeof(*f))) == NULL((void*)0)) |
| 2663 | fatal("allocate struct filed"); |
| 2664 | for (i = 0; i <= LOG_NFACILITIES24; i++) |
| 2665 | f->f_pmask[i] = INTERNAL_NOPRI0x10; |
| 2666 | |
| 2667 | /* save program name if any */ |
| 2668 | f->f_quick = 0; |
| 2669 | if (*progblock == '!') { |
| 2670 | progblock++; |
| 2671 | f->f_quick = 1; |
| 2672 | } |
| 2673 | if (*hostblock == '+') { |
| 2674 | hostblock++; |
| 2675 | f->f_quick = 1; |
| 2676 | } |
| 2677 | if (strcmp(progblock, "*") != 0) |
| 2678 | f->f_program = strdup(progblock); |
| 2679 | if (strcmp(hostblock, "*") != 0) |
| 2680 | f->f_hostname = strdup(hostblock); |
| 2681 | |
| 2682 | /* scan through the list of selectors */ |
| 2683 | for (p = line; *p && *p != '\t' && *p != ' ';) { |
| 2684 | |
| 2685 | /* find the end of this facility name list */ |
| 2686 | for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; ) |
| 2687 | continue; |
| 2688 | |
| 2689 | /* collect priority name */ |
| 2690 | for (bp = buf; *q && !strchr("\t,; ", *q); ) |
| 2691 | *bp++ = *q++; |
| 2692 | *bp = '\0'; |
| 2693 | |
| 2694 | /* skip cruft */ |
| 2695 | while (*q && strchr(",;", *q)) |
| 2696 | q++; |
| 2697 | |
| 2698 | /* decode priority name */ |
| 2699 | if (*buf == '*') |
| 2700 | pri = LOG_PRIMASK0x07 + 1; |
| 2701 | else { |
| 2702 | /* ignore trailing spaces */ |
| 2703 | for (i=strlen(buf)-1; i >= 0 && buf[i] == ' '; i--) { |
| 2704 | buf[i]='\0'; |
| 2705 | } |
| 2706 | |
| 2707 | pri = decode(buf, prioritynames); |
| 2708 | if (pri < 0) { |
| 2709 | log_warnx("unknown priority name \"%s\"", buf); |
| 2710 | free(f); |
| 2711 | return (NULL((void*)0)); |
| 2712 | } |
| 2713 | } |
| 2714 | |
| 2715 | /* scan facilities */ |
| 2716 | while (*p && !strchr("\t.; ", *p)) { |
| 2717 | for (bp = buf; *p && !strchr("\t,;. ", *p); ) |
| 2718 | *bp++ = *p++; |
| 2719 | *bp = '\0'; |
| 2720 | if (*buf == '*') |
| 2721 | for (i = 0; i < LOG_NFACILITIES24; i++) |
| 2722 | f->f_pmask[i] = pri; |
| 2723 | else { |
| 2724 | i = decode(buf, facilitynames); |
| 2725 | if (i < 0) { |
| 2726 | log_warnx("unknown facility name " |
| 2727 | "\"%s\"", buf); |
| 2728 | free(f); |
| 2729 | return (NULL((void*)0)); |
| 2730 | } |
| 2731 | f->f_pmask[i >> 3] = pri; |
| 2732 | } |
| 2733 | while (*p == ',' || *p == ' ') |
| 2734 | p++; |
| 2735 | } |
| 2736 | |
| 2737 | p = q; |
| 2738 | } |
| 2739 | |
| 2740 | /* skip to action part */ |
| 2741 | while (*p == '\t' || *p == ' ') |
| 2742 | p++; |
| 2743 | |
| 2744 | switch (*p) { |
| 2745 | case '@': |
| 2746 | if ((strlcpy(f->f_un.f_forw.f_loghost, p, |
| 2747 | sizeof(f->f_un.f_forw.f_loghost)) >= |
| 2748 | sizeof(f->f_un.f_forw.f_loghost))) { |
| 2749 | log_warnx("loghost too long \"%s\"", p); |
| 2750 | break; |
| 2751 | } |
| 2752 | if (loghost_parse(++p, &proto, &host, &port) == -1) { |
| 2753 | log_warnx("bad loghost \"%s\"", |
| 2754 | f->f_un.f_forw.f_loghost); |
| 2755 | break; |
| 2756 | } |
| 2757 | if (proto == NULL((void*)0)) |
| 2758 | proto = "udp"; |
| 2759 | if (strcmp(proto, "udp") == 0) { |
| 2760 | if (fd_udp == -1) |
| 2761 | proto = "udp6"; |
| 2762 | if (fd_udp6 == -1) |
| 2763 | proto = "udp4"; |
| 2764 | } |
| 2765 | ipproto = proto; |
| 2766 | if (strcmp(proto, "udp") == 0) { |
| 2767 | send_udp = send_udp6 = 1; |
| 2768 | } else if (strcmp(proto, "udp4") == 0) { |
| 2769 | send_udp = 1; |
| 2770 | if (fd_udp == -1) { |
| 2771 | log_warnx("no udp4 \"%s\"", |
| 2772 | f->f_un.f_forw.f_loghost); |
| 2773 | break; |
| 2774 | } |
| 2775 | } else if (strcmp(proto, "udp6") == 0) { |
| 2776 | send_udp6 = 1; |
| 2777 | if (fd_udp6 == -1) { |
| 2778 | log_warnx("no udp6 \"%s\"", |
| 2779 | f->f_un.f_forw.f_loghost); |
| 2780 | break; |
| 2781 | } |
| 2782 | } else if (strcmp(proto, "tcp") == 0 || |
| 2783 | strcmp(proto, "tcp4") == 0 || strcmp(proto, "tcp6") == 0) { |
| 2784 | ; |
| 2785 | } else if (strcmp(proto, "tls") == 0) { |
| 2786 | ipproto = "tcp"; |
| 2787 | } else if (strcmp(proto, "tls4") == 0) { |
| 2788 | ipproto = "tcp4"; |
| 2789 | } else if (strcmp(proto, "tls6") == 0) { |
| 2790 | ipproto = "tcp6"; |
| 2791 | } else { |
| 2792 | log_warnx("bad protocol \"%s\"", |
| 2793 | f->f_un.f_forw.f_loghost); |
| 2794 | break; |
| 2795 | } |
| 2796 | if (strlen(host) >= NI_MAXHOST256) { |
| 2797 | log_warnx("host too long \"%s\"", |
| 2798 | f->f_un.f_forw.f_loghost); |
| 2799 | break; |
| 2800 | } |
| 2801 | if (port == NULL((void*)0)) |
| 2802 | port = strncmp(proto, "tls", 3) == 0 ? |
| 2803 | "syslog-tls" : "syslog"; |
| 2804 | if (strlen(port) >= NI_MAXSERV32) { |
| 2805 | log_warnx("port too long \"%s\"", |
| 2806 | f->f_un.f_forw.f_loghost); |
| 2807 | break; |
| 2808 | } |
| 2809 | if (priv_getaddrinfo(ipproto, host, port, |
| 2810 | (struct sockaddr*)&f->f_un.f_forw.f_addr, |
| 2811 | sizeof(f->f_un.f_forw.f_addr)) != 0) { |
| 2812 | log_warnx("bad hostname \"%s\"", |
| 2813 | f->f_un.f_forw.f_loghost); |
| 2814 | break; |
| 2815 | } |
| 2816 | f->f_file = -1; |
| 2817 | if (strncmp(proto, "udp", 3) == 0) { |
| 2818 | switch (f->f_un.f_forw.f_addr.ss_family) { |
| 2819 | case AF_INET2: |
| 2820 | f->f_file = fd_udp; |
| 2821 | break; |
| 2822 | case AF_INET624: |
| 2823 | f->f_file = fd_udp6; |
| 2824 | break; |
| 2825 | } |
| 2826 | f->f_type = F_FORWUDP4; |
| 2827 | } else if (strncmp(ipproto, "tcp", 3) == 0) { |
| 2828 | if ((f->f_un.f_forw.f_bufev = bufferevent_new(-1, |
| 2829 | tcp_dropcb, tcp_writecb, tcp_errorcb, f)) == NULL((void*)0)) { |
| 2830 | log_warn("bufferevent \"%s\"", |
| 2831 | f->f_un.f_forw.f_loghost); |
| 2832 | break; |
| 2833 | } |
| 2834 | if (strncmp(proto, "tls", 3) == 0) { |
| 2835 | f->f_un.f_forw.f_host = strdup(host); |
| 2836 | f->f_type = F_FORWTLS10; |
| 2837 | } else { |
| 2838 | f->f_type = F_FORWTCP9; |
| 2839 | } |
| 2840 | /* |
| 2841 | * If we try to connect to a TLS server immediately |
| 2842 | * syslogd gets an SIGPIPE as the signal handlers have |
| 2843 | * not been set up. Delay the connection until the |
| 2844 | * event loop is started. We can reuse the write event |
| 2845 | * for that as bufferevent is still disabled. |
| 2846 | */ |
| 2847 | to.tv_sec = 0; |
| 2848 | to.tv_usec = 1; |
| 2849 | evtimer_set(&f->f_un.f_forw.f_bufev->ev_write,event_set(&f->f_un.f_forw.f_bufev->ev_write, -1, 0, tcp_connectcb, f) |
| 2850 | tcp_connectcb, f)event_set(&f->f_un.f_forw.f_bufev->ev_write, -1, 0, tcp_connectcb, f); |
| 2851 | evtimer_add(&f->f_un.f_forw.f_bufev->ev_write, &to)event_add(&f->f_un.f_forw.f_bufev->ev_write, &to ); |
| 2852 | } |
| 2853 | break; |
| 2854 | |
| 2855 | case '/': |
| 2856 | case '|': |
| 2857 | (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname)); |
| 2858 | d = find_dup(f); |
| 2859 | if (d != NULL((void*)0)) { |
| 2860 | for (i = 0; i <= LOG_NFACILITIES24; i++) |
| 2861 | if (f->f_pmask[i] != INTERNAL_NOPRI0x10) |
| 2862 | d->f_pmask[i] = f->f_pmask[i]; |
| 2863 | free(f); |
| 2864 | return (NULL((void*)0)); |
| 2865 | } |
| 2866 | if (strcmp(p, ctty) == 0) { |
| 2867 | f->f_file = priv_open_tty(p); |
| 2868 | if (f->f_file < 0) |
| 2869 | log_warn("priv_open_tty \"%s\"", p); |
| 2870 | } else { |
| 2871 | f->f_file = priv_open_log(p); |
| 2872 | if (f->f_file < 0) |
| 2873 | log_warn("priv_open_log \"%s\"", p); |
| 2874 | } |
| 2875 | if (f->f_file < 0) { |
| 2876 | f->f_type = F_UNUSED0; |
| 2877 | break; |
| 2878 | } |
| 2879 | if (isatty(f->f_file)) { |
| 2880 | if (strcmp(p, ctty) == 0) |
| 2881 | f->f_type = F_CONSOLE3; |
| 2882 | else |
| 2883 | f->f_type = F_TTY2; |
| 2884 | } else { |
| 2885 | if (*p == '|') |
| 2886 | f->f_type = F_PIPE8; |
| 2887 | else { |
| 2888 | f->f_type = F_FILE1; |
| 2889 | |
| 2890 | /* Clear O_NONBLOCK flag on f->f_file */ |
| 2891 | if ((i = fcntl(f->f_file, F_GETFL3)) != -1) { |
| 2892 | i &= ~O_NONBLOCK0x0004; |
| 2893 | fcntl(f->f_file, F_SETFL4, i); |
| 2894 | } |
| 2895 | } |
| 2896 | } |
| 2897 | break; |
| 2898 | |
| 2899 | case '*': |
| 2900 | f->f_type = F_WALL6; |
| 2901 | break; |
| 2902 | |
| 2903 | case ':': |
| 2904 | f->f_type = F_MEMBUF7; |
| 2905 | |
| 2906 | /* Parse buffer size (in kb) */ |
| 2907 | errno(*__errno()) = 0; |
| 2908 | rb_len = strtoul(++p, &q, 0); |
| 2909 | if (*p == '\0' || (errno(*__errno()) == ERANGE34 && rb_len == ULONG_MAX(9223372036854775807L *2UL+1UL)) || |
| 2910 | *q != ':' || rb_len == 0) { |
| 2911 | f->f_type = F_UNUSED0; |
| 2912 | log_warnx("strtoul \"%s\"", p); |
| 2913 | break; |
| 2914 | } |
| 2915 | q++; |
| 2916 | rb_len *= 1024; |
| 2917 | |
| 2918 | /* Copy buffer name */ |
| 2919 | for(i = 0; (size_t)i < sizeof(f->f_un.f_mb.f_mname) - 1; i++) { |
| 2920 | if (!isalnum((unsigned char)q[i])) |
| 2921 | break; |
| 2922 | f->f_un.f_mb.f_mname[i] = q[i]; |
| 2923 | } |
| 2924 | |
| 2925 | /* Make sure buffer name is unique */ |
| 2926 | xf = find_dup(f); |
| 2927 | |
| 2928 | /* Error on missing or non-unique name, or bad buffer length */ |
| 2929 | if (i == 0 || rb_len > MAX_MEMBUF(256 * 1024) || xf != NULL((void*)0)) { |
| 2930 | f->f_type = F_UNUSED0; |
| 2931 | log_warnx("find_dup \"%s\"", p); |
| 2932 | break; |
| 2933 | } |
| 2934 | |
| 2935 | /* Set buffer length */ |
| 2936 | rb_len = MAXIMUM(rb_len, MIN_MEMBUF)(((rb_len) > ((8192 * 4))) ? (rb_len) : ((8192 * 4))); |
| 2937 | f->f_un.f_mb.f_len = rb_len; |
| 2938 | f->f_un.f_mb.f_overflow = 0; |
| 2939 | f->f_un.f_mb.f_attached = 0; |
| 2940 | break; |
| 2941 | |
| 2942 | default: |
| 2943 | for (i = 0; i < MAXUNAMES20 && *p; i++) { |
| 2944 | for (q = p; *q && *q != ','; ) |
| 2945 | q++; |
| 2946 | (void)strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE32); |
| 2947 | if ((q - p) > UT_NAMESIZE32) |
| 2948 | f->f_un.f_uname[i][UT_NAMESIZE32] = '\0'; |
| 2949 | else |
| 2950 | f->f_un.f_uname[i][q - p] = '\0'; |
| 2951 | while (*q == ',' || *q == ' ') |
| 2952 | q++; |
| 2953 | p = q; |
| 2954 | } |
| 2955 | f->f_type = F_USERS5; |
| 2956 | break; |
| 2957 | } |
| 2958 | return (f); |
| 2959 | } |
| 2960 | |
| 2961 | /* |
| 2962 | * Parse the host and port parts from a loghost string. |
| 2963 | */ |
| 2964 | int |
| 2965 | loghost_parse(char *str, char **proto, char **host, char **port) |
| 2966 | { |
| 2967 | char *prefix = NULL((void*)0); |
| 2968 | |
| 2969 | if ((*host = strchr(str, ':')) && |
| 2970 | (*host)[1] == '/' && (*host)[2] == '/') { |
| 2971 | prefix = str; |
| 2972 | **host = '\0'; |
| 2973 | str = *host + 3; |
| 2974 | } |
| 2975 | if (proto) |
| 2976 | *proto = prefix; |
| 2977 | else if (prefix) |
| 2978 | return (-1); |
| 2979 | |
| 2980 | *host = str; |
| 2981 | if (**host == '[') { |
| 2982 | (*host)++; |
| 2983 | str = strchr(*host, ']'); |
| 2984 | if (str == NULL((void*)0)) |
| 2985 | return (-1); |
| 2986 | *str++ = '\0'; |
| 2987 | } |
| 2988 | *port = strrchr(str, ':'); |
| 2989 | if (*port != NULL((void*)0)) |
| 2990 | *(*port)++ = '\0'; |
| 2991 | |
| 2992 | return (0); |
| 2993 | } |
| 2994 | |
| 2995 | /* |
| 2996 | * Retrieve the size of the kernel message buffer, via sysctl. |
| 2997 | */ |
| 2998 | int |
| 2999 | getmsgbufsize(void) |
| 3000 | { |
| 3001 | int msgbufsize, mib[2]; |
| 3002 | size_t size; |
| 3003 | |
| 3004 | mib[0] = CTL_KERN1; |
| 3005 | mib[1] = KERN_MSGBUFSIZE38; |
| 3006 | size = sizeof msgbufsize; |
| 3007 | if (sysctl(mib, 2, &msgbufsize, &size, NULL((void*)0), 0) == -1) { |
| 3008 | log_debug("couldn't get kern.msgbufsize"); |
| 3009 | return (0); |
| 3010 | } |
| 3011 | return (msgbufsize); |
| 3012 | } |
| 3013 | |
| 3014 | /* |
| 3015 | * Decode a symbolic name to a numeric value |
| 3016 | */ |
| 3017 | int |
| 3018 | decode(const char *name, const CODE *codetab) |
| 3019 | { |
| 3020 | const CODE *c; |
| 3021 | char *p, buf[40]; |
| 3022 | |
| 3023 | for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) { |
| 3024 | if (isupper((unsigned char)*name)) |
| 3025 | *p = tolower((unsigned char)*name); |
| 3026 | else |
| 3027 | *p = *name; |
| 3028 | } |
| 3029 | *p = '\0'; |
| 3030 | for (c = codetab; c->c_name; c++) |
| 3031 | if (!strcmp(buf, c->c_name)) |
| 3032 | return (c->c_val); |
| 3033 | |
| 3034 | return (-1); |
| 3035 | } |
| 3036 | |
| 3037 | void |
| 3038 | markit(void) |
| 3039 | { |
| 3040 | struct filed *f; |
| 3041 | |
| 3042 | (void)gettimeofday(&now, NULL((void*)0)); |
| 3043 | MarkSeq += TIMERINTVL30; |
| 3044 | if (MarkSeq >= MarkInterval) { |
| 3045 | logline(LOG_INFO6, ADDDATE0x004|MARK0x008, LocalHostName, "-- MARK --"); |
| 3046 | MarkSeq = 0; |
| 3047 | } |
| 3048 | |
| 3049 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void*)0); (f ) = ((f)->f_next.sqe_next)) { |
| 3050 | if (f->f_prevcount && now.tv_sec >= REPEATTIME(f)((f)->f_time + repeatinterval[(f)->f_repeatcount])) { |
| 3051 | log_debug("flush %s: repeated %d times, %d sec", |
| 3052 | TypeNames[f->f_type], f->f_prevcount, |
| 3053 | repeatinterval[f->f_repeatcount]); |
| 3054 | fprintlog(f, 0, (char *)NULL((void*)0)); |
| 3055 | BACKOFF(f){ if (++(f)->f_repeatcount > ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)) (f)->f_repeatcount = ((sizeof (repeatinterval) / sizeof(repeatinterval[0])) - 1); }; |
| 3056 | } |
| 3057 | } |
| 3058 | } |
| 3059 | |
| 3060 | int |
| 3061 | unix_socket(char *path, int type, mode_t mode) |
| 3062 | { |
| 3063 | struct sockaddr_un s_un; |
| 3064 | int fd, optval; |
| 3065 | mode_t old_umask; |
| 3066 | |
| 3067 | memset(&s_un, 0, sizeof(s_un)); |
| 3068 | s_un.sun_family = AF_UNIX1; |
| 3069 | if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >= |
| 3070 | sizeof(s_un.sun_path)) { |
| 3071 | log_warnx("socket path too long \"%s\"", path); |
| 3072 | return (-1); |
| 3073 | } |
| 3074 | |
| 3075 | if ((fd = socket(AF_UNIX1, type, 0)) == -1) { |
| 3076 | log_warn("socket unix \"%s\"", path); |
| 3077 | return (-1); |
| 3078 | } |
| 3079 | |
| 3080 | if (Debug) { |
| 3081 | if (connect(fd, (struct sockaddr *)&s_un, sizeof(s_un)) == 0 || |
| 3082 | errno(*__errno()) == EPROTOTYPE41) { |
| 3083 | close(fd); |
| 3084 | errno(*__errno()) = EISCONN56; |
| 3085 | log_warn("connect unix \"%s\"", path); |
| 3086 | return (-1); |
| 3087 | } |
| 3088 | } |
| 3089 | |
| 3090 | old_umask = umask(0177); |
| 3091 | |
| 3092 | unlink(path); |
| 3093 | if (bind(fd, (struct sockaddr *)&s_un, sizeof(s_un)) == -1) { |
| 3094 | log_warn("bind unix \"%s\"", path); |
| 3095 | umask(old_umask); |
| 3096 | close(fd); |
| 3097 | return (-1); |
| 3098 | } |
| 3099 | |
| 3100 | umask(old_umask); |
| 3101 | |
| 3102 | if (chmod(path, mode) == -1) { |
| 3103 | log_warn("chmod unix \"%s\"", path); |
| 3104 | close(fd); |
| 3105 | unlink(path); |
| 3106 | return (-1); |
| 3107 | } |
| 3108 | |
| 3109 | optval = LOG_MAXLINE8192 + PATH_MAX1024; |
| 3110 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_RCVBUF0x1002, &optval, sizeof(optval)) |
| 3111 | == -1) |
| 3112 | log_warn("setsockopt unix \"%s\"", path); |
| 3113 | |
| 3114 | return (fd); |
| 3115 | } |
| 3116 | |
| 3117 | /* |
| 3118 | * Increase socket buffer size in small steps to get partial success |
| 3119 | * if we hit a kernel limit. Allow an optional final step. |
| 3120 | */ |
| 3121 | void |
| 3122 | double_sockbuf(int fd, int optname, int bigsize) |
| 3123 | { |
| 3124 | socklen_t len; |
| 3125 | int i, newsize, oldsize = 0; |
| 3126 | |
| 3127 | len = sizeof(oldsize); |
| 3128 | if (getsockopt(fd, SOL_SOCKET0xffff, optname, &oldsize, &len) == -1) |
| 3129 | log_warn("getsockopt bufsize"); |
| 3130 | len = sizeof(newsize); |
| 3131 | newsize = LOG_MAXLINE8192 + 128; /* data + control */ |
| 3132 | /* allow 8 full length messages, that is 66560 bytes */ |
| 3133 | for (i = 0; i < 4; i++, newsize *= 2) { |
| 3134 | if (newsize <= oldsize) |
| 3135 | continue; |
| 3136 | if (setsockopt(fd, SOL_SOCKET0xffff, optname, &newsize, len) == -1) |
| 3137 | log_warn("setsockopt bufsize %d", newsize); |
| 3138 | else |
| 3139 | oldsize = newsize; |
| 3140 | } |
| 3141 | if (bigsize && bigsize > oldsize) { |
| 3142 | if (setsockopt(fd, SOL_SOCKET0xffff, optname, &bigsize, len) == -1) |
| 3143 | log_warn("setsockopt bufsize %d", bigsize); |
| 3144 | } |
| 3145 | } |
| 3146 | |
| 3147 | void |
| 3148 | set_sockbuf(int fd) |
| 3149 | { |
| 3150 | int size = 65536; |
| 3151 | |
| 3152 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_SNDBUF0x1001, &size, sizeof(size)) == -1) |
| 3153 | log_warn("setsockopt sndbufsize %d", size); |
| 3154 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_RCVBUF0x1002, &size, sizeof(size)) == -1) |
| 3155 | log_warn("setsockopt rcvbufsize %d", size); |
| 3156 | } |
| 3157 | |
| 3158 | void |
| 3159 | set_keepalive(int fd) |
| 3160 | { |
| 3161 | int val = 1; |
| 3162 | |
| 3163 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_KEEPALIVE0x0008, &val, sizeof(val)) == -1) |
| 3164 | log_warn("setsockopt keepalive %d", val); |
| 3165 | } |
| 3166 | |
| 3167 | void |
| 3168 | ctlconn_cleanup(void) |
| 3169 | { |
| 3170 | struct filed *f; |
| 3171 | |
| 3172 | close(fd_ctlconn); |
| 3173 | fd_ctlconn = -1; |
| 3174 | event_del(ev_ctlread); |
| 3175 | event_del(ev_ctlwrite); |
| 3176 | event_add(ev_ctlaccept, NULL((void*)0)); |
| 3177 | |
| 3178 | if (ctl_state == CTL_WRITING_CONT_REPLY3) |
| 3179 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void*)0); (f ) = ((f)->f_next.sqe_next)) |
| 3180 | if (f->f_type == F_MEMBUF7) |
| 3181 | f->f_un.f_mb.f_attached = 0; |
| 3182 | |
| 3183 | ctl_state = ctl_cmd_bytes = ctl_reply_offset = ctl_reply_size = 0; |
| 3184 | } |
| 3185 | |
| 3186 | void |
| 3187 | ctlsock_acceptcb(int fd, short event, void *arg) |
| 3188 | { |
| 3189 | struct event *ev = arg; |
| 3190 | |
| 3191 | if ((fd = reserve_accept4(fd, event, ev, ctlsock_acceptcb, |
| 3192 | NULL((void*)0), NULL((void*)0), SOCK_NONBLOCK0x4000)) == -1) { |
| 3193 | if (errno(*__errno()) != ENFILE23 && errno(*__errno()) != EMFILE24 && |
| 3194 | errno(*__errno()) != EINTR4 && errno(*__errno()) != EWOULDBLOCK35 && |
| 3195 | errno(*__errno()) != ECONNABORTED53) |
| 3196 | log_warn("accept control socket"); |
| 3197 | return; |
| 3198 | } |
| 3199 | log_debug("Accepting control connection"); |
| 3200 | |
| 3201 | if (fd_ctlconn != -1) |
| 3202 | ctlconn_cleanup(); |
| 3203 | |
| 3204 | /* Only one connection at a time */ |
| 3205 | event_del(ev); |
| 3206 | |
| 3207 | fd_ctlconn = fd; |
| 3208 | /* file descriptor has changed, reset event */ |
| 3209 | event_set(ev_ctlread, fd_ctlconn, EV_READ0x02|EV_PERSIST0x10, |
| 3210 | ctlconn_readcb, ev_ctlread); |
| 3211 | event_set(ev_ctlwrite, fd_ctlconn, EV_WRITE0x04|EV_PERSIST0x10, |
| 3212 | ctlconn_writecb, ev_ctlwrite); |
| 3213 | event_add(ev_ctlread, NULL((void*)0)); |
| 3214 | ctl_state = CTL_READING_CMD1; |
| 3215 | ctl_cmd_bytes = 0; |
| 3216 | } |
| 3217 | |
| 3218 | static struct filed |
| 3219 | *find_membuf_log(const char *name) |
| 3220 | { |
| 3221 | struct filed *f; |
| 3222 | |
| 3223 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void*)0); (f ) = ((f)->f_next.sqe_next)) { |
| 3224 | if (f->f_type == F_MEMBUF7 && |
| 3225 | strcmp(f->f_un.f_mb.f_mname, name) == 0) |
| 3226 | break; |
| 3227 | } |
| 3228 | return (f); |
| 3229 | } |
| 3230 | |
| 3231 | void |
| 3232 | ctlconn_readcb(int fd, short event, void *arg) |
| 3233 | { |
| 3234 | struct filed *f; |
| 3235 | struct ctl_reply_hdr *reply_hdr = (struct ctl_reply_hdr *)ctl_reply; |
| 3236 | ssize_t n; |
| 3237 | u_int32_t flags = 0; |
| 3238 | |
| 3239 | if (ctl_state == CTL_WRITING_REPLY2 || |
| 3240 | ctl_state == CTL_WRITING_CONT_REPLY3) { |
| 3241 | /* client has closed the connection */ |
| 3242 | ctlconn_cleanup(); |
| 3243 | return; |
| 3244 | } |
| 3245 | |
| 3246 | retry: |
| 3247 | n = read(fd, (char*)&ctl_cmd + ctl_cmd_bytes, |
| 3248 | sizeof(ctl_cmd) - ctl_cmd_bytes); |
| 3249 | switch (n) { |
| 3250 | case -1: |
| 3251 | if (errno(*__errno()) == EINTR4) |
| 3252 | goto retry; |
| 3253 | if (errno(*__errno()) == EWOULDBLOCK35) |
| 3254 | return; |
| 3255 | log_warn("read control socket"); |
| 3256 | /* FALLTHROUGH */ |
| 3257 | case 0: |
| 3258 | ctlconn_cleanup(); |
| 3259 | return; |
| 3260 | default: |
| 3261 | ctl_cmd_bytes += n; |
| 3262 | } |
| 3263 | if (ctl_cmd_bytes < sizeof(ctl_cmd)) |
| 3264 | return; |
| 3265 | |
| 3266 | if (ntohl(ctl_cmd.version)(__uint32_t)(__builtin_constant_p(ctl_cmd.version) ? (__uint32_t )(((__uint32_t)(ctl_cmd.version) & 0xff) << 24 | (( __uint32_t)(ctl_cmd.version) & 0xff00) << 8 | ((__uint32_t )(ctl_cmd.version) & 0xff0000) >> 8 | ((__uint32_t) (ctl_cmd.version) & 0xff000000) >> 24) : __swap32md (ctl_cmd.version)) != CTL_VERSION2) { |
| 3267 | log_warnx("unknown client protocol version"); |
| 3268 | ctlconn_cleanup(); |
| 3269 | return; |
| 3270 | } |
| 3271 | |
| 3272 | /* Ensure that logname is \0 terminated */ |
| 3273 | if (memchr(ctl_cmd.logname, '\0', sizeof(ctl_cmd.logname)) == NULL((void*)0)) { |
| 3274 | log_warnx("corrupt control socket command"); |
| 3275 | ctlconn_cleanup(); |
| 3276 | return; |
| 3277 | } |
| 3278 | |
| 3279 | *reply_text = '\0'; |
| 3280 | |
| 3281 | ctl_reply_size = ctl_reply_offset = 0; |
| 3282 | memset(reply_hdr, '\0', sizeof(*reply_hdr)); |
| 3283 | |
| 3284 | ctl_cmd.cmd = ntohl(ctl_cmd.cmd)(__uint32_t)(__builtin_constant_p(ctl_cmd.cmd) ? (__uint32_t) (((__uint32_t)(ctl_cmd.cmd) & 0xff) << 24 | ((__uint32_t )(ctl_cmd.cmd) & 0xff00) << 8 | ((__uint32_t)(ctl_cmd .cmd) & 0xff0000) >> 8 | ((__uint32_t)(ctl_cmd.cmd) & 0xff000000) >> 24) : __swap32md(ctl_cmd.cmd)); |
| 3285 | log_debug("ctlcmd %x logname \"%s\"", ctl_cmd.cmd, ctl_cmd.logname); |
| 3286 | |
| 3287 | switch (ctl_cmd.cmd) { |
| 3288 | case CMD_READ1: |
| 3289 | case CMD_READ_CLEAR2: |
| 3290 | case CMD_READ_CONT6: |
| 3291 | case CMD_FLAGS5: |
| 3292 | f = find_membuf_log(ctl_cmd.logname); |
| 3293 | if (f == NULL((void*)0)) { |
| 3294 | strlcpy(reply_text, "No such log\n", MAX_MEMBUF(256 * 1024)); |
| 3295 | } else { |
| 3296 | if (ctl_cmd.cmd != CMD_FLAGS5) { |
| 3297 | ringbuf_to_string(reply_text, MAX_MEMBUF(256 * 1024), |
| 3298 | f->f_un.f_mb.f_rb); |
| 3299 | } |
| 3300 | if (f->f_un.f_mb.f_overflow) |
| 3301 | flags |= CTL_HDR_FLAG_OVERFLOW0x01; |
| 3302 | if (ctl_cmd.cmd == CMD_READ_CLEAR2) { |
| 3303 | ringbuf_clear(f->f_un.f_mb.f_rb); |
| 3304 | f->f_un.f_mb.f_overflow = 0; |
| 3305 | } |
| 3306 | if (ctl_cmd.cmd == CMD_READ_CONT6) { |
| 3307 | f->f_un.f_mb.f_attached = 1; |
| 3308 | tailify_replytext(reply_text, |
| 3309 | ctl_cmd.lines > 0 ? ctl_cmd.lines : 10); |
| 3310 | } else if (ctl_cmd.lines > 0) { |
| 3311 | tailify_replytext(reply_text, ctl_cmd.lines); |
| 3312 | } |
| 3313 | } |
| 3314 | break; |
| 3315 | case CMD_CLEAR3: |
| 3316 | f = find_membuf_log(ctl_cmd.logname); |
| 3317 | if (f == NULL((void*)0)) { |
| 3318 | strlcpy(reply_text, "No such log\n", MAX_MEMBUF(256 * 1024)); |
| 3319 | } else { |
| 3320 | ringbuf_clear(f->f_un.f_mb.f_rb); |
| 3321 | if (f->f_un.f_mb.f_overflow) |
| 3322 | flags |= CTL_HDR_FLAG_OVERFLOW0x01; |
| 3323 | f->f_un.f_mb.f_overflow = 0; |
| 3324 | strlcpy(reply_text, "Log cleared\n", MAX_MEMBUF(256 * 1024)); |
| 3325 | } |
| 3326 | break; |
| 3327 | case CMD_LIST4: |
| 3328 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void*)0); (f ) = ((f)->f_next.sqe_next)) { |
| 3329 | if (f->f_type == F_MEMBUF7) { |
| 3330 | strlcat(reply_text, f->f_un.f_mb.f_mname, |
| 3331 | MAX_MEMBUF(256 * 1024)); |
| 3332 | if (f->f_un.f_mb.f_overflow) { |
| 3333 | strlcat(reply_text, "*", MAX_MEMBUF(256 * 1024)); |
| 3334 | flags |= CTL_HDR_FLAG_OVERFLOW0x01; |
| 3335 | } |
| 3336 | strlcat(reply_text, " ", MAX_MEMBUF(256 * 1024)); |
| 3337 | } |
| 3338 | } |
| 3339 | strlcat(reply_text, "\n", MAX_MEMBUF(256 * 1024)); |
| 3340 | break; |
| 3341 | default: |
| 3342 | log_warnx("unsupported control socket command"); |
| 3343 | ctlconn_cleanup(); |
| 3344 | return; |
| 3345 | } |
| 3346 | reply_hdr->version = htonl(CTL_VERSION)(__uint32_t)(__builtin_constant_p(2) ? (__uint32_t)(((__uint32_t )(2) & 0xff) << 24 | ((__uint32_t)(2) & 0xff00) << 8 | ((__uint32_t)(2) & 0xff0000) >> 8 | ( (__uint32_t)(2) & 0xff000000) >> 24) : __swap32md(2 )); |
| 3347 | reply_hdr->flags = htonl(flags)(__uint32_t)(__builtin_constant_p(flags) ? (__uint32_t)(((__uint32_t )(flags) & 0xff) << 24 | ((__uint32_t)(flags) & 0xff00) << 8 | ((__uint32_t)(flags) & 0xff0000) >> 8 | ((__uint32_t)(flags) & 0xff000000) >> 24) : __swap32md (flags)); |
| 3348 | |
| 3349 | ctl_reply_size = CTL_REPLY_SIZE(strlen(reply_text) + (sizeof(struct ctl_reply_hdr))); |
| 3350 | log_debug("ctlcmd reply length %lu", (u_long)ctl_reply_size); |
| 3351 | |
| 3352 | /* Otherwise, set up to write out reply */ |
| 3353 | ctl_state = (ctl_cmd.cmd == CMD_READ_CONT6) ? |
| 3354 | CTL_WRITING_CONT_REPLY3 : CTL_WRITING_REPLY2; |
| 3355 | |
| 3356 | event_add(ev_ctlwrite, NULL((void*)0)); |
| 3357 | |
| 3358 | /* another syslogc can kick us out */ |
| 3359 | if (ctl_state == CTL_WRITING_CONT_REPLY3) |
| 3360 | event_add(ev_ctlaccept, NULL((void*)0)); |
| 3361 | } |
| 3362 | |
| 3363 | void |
| 3364 | ctlconn_writecb(int fd, short event, void *arg) |
| 3365 | { |
| 3366 | struct event *ev = arg; |
| 3367 | ssize_t n; |
| 3368 | |
| 3369 | if (!(ctl_state == CTL_WRITING_REPLY2 || |
| 3370 | ctl_state == CTL_WRITING_CONT_REPLY3)) { |
| 3371 | /* Shouldn't be here! */ |
| 3372 | log_warnx("control socket write with bad state"); |
| 3373 | ctlconn_cleanup(); |
| 3374 | return; |
| 3375 | } |
| 3376 | |
| 3377 | retry: |
| 3378 | n = write(fd, ctl_reply + ctl_reply_offset, |
| 3379 | ctl_reply_size - ctl_reply_offset); |
| 3380 | switch (n) { |
| 3381 | case -1: |
| 3382 | if (errno(*__errno()) == EINTR4) |
| 3383 | goto retry; |
| 3384 | if (errno(*__errno()) == EWOULDBLOCK35) |
| 3385 | return; |
| 3386 | if (errno(*__errno()) != EPIPE32) |
| 3387 | log_warn("write control socket"); |
| 3388 | /* FALLTHROUGH */ |
| 3389 | case 0: |
| 3390 | ctlconn_cleanup(); |
| 3391 | return; |
| 3392 | default: |
| 3393 | ctl_reply_offset += n; |
| 3394 | } |
| 3395 | if (ctl_reply_offset < ctl_reply_size) |
| 3396 | return; |
| 3397 | |
| 3398 | if (ctl_state != CTL_WRITING_CONT_REPLY3) { |
| 3399 | ctlconn_cleanup(); |
| 3400 | return; |
| 3401 | } |
| 3402 | |
| 3403 | /* |
| 3404 | * Make space in the buffer for continous writes. |
| 3405 | * Set offset behind reply header to skip it |
| 3406 | */ |
| 3407 | *reply_text = '\0'; |
| 3408 | ctl_reply_offset = ctl_reply_size = CTL_REPLY_SIZE(strlen(reply_text) + (sizeof(struct ctl_reply_hdr))); |
| 3409 | |
| 3410 | /* Now is a good time to report dropped lines */ |
| 3411 | if (membuf_drop) { |
| 3412 | strlcat(reply_text, "<ENOBUFS>\n", MAX_MEMBUF(256 * 1024)); |
| 3413 | ctl_reply_size = CTL_REPLY_SIZE(strlen(reply_text) + (sizeof(struct ctl_reply_hdr))); |
| 3414 | membuf_drop = 0; |
| 3415 | } else { |
| 3416 | /* Nothing left to write */ |
| 3417 | event_del(ev); |
| 3418 | } |
| 3419 | } |
| 3420 | |
| 3421 | /* Shorten replytext to number of lines */ |
| 3422 | void |
| 3423 | tailify_replytext(char *replytext, int lines) |
| 3424 | { |
| 3425 | char *start, *nl; |
| 3426 | int count = 0; |
| 3427 | start = nl = replytext; |
| 3428 | |
| 3429 | while ((nl = strchr(nl, '\n')) != NULL((void*)0)) { |
| 3430 | nl++; |
| 3431 | if (++count > lines) { |
| 3432 | start = strchr(start, '\n'); |
| 3433 | start++; |
| 3434 | } |
| 3435 | } |
| 3436 | if (start != replytext) { |
| 3437 | int len = strlen(start); |
| 3438 | memmove(replytext, start, len); |
| 3439 | *(replytext + len) = '\0'; |
| 3440 | } |
| 3441 | } |
| 3442 | |
| 3443 | void |
| 3444 | ctlconn_logto(char *line) |
| 3445 | { |
| 3446 | size_t l; |
| 3447 | |
| 3448 | if (membuf_drop) |
| 3449 | return; |
| 3450 | |
| 3451 | l = strlen(line); |
| 3452 | if (l + 2 > (CTL_REPLY_MAXSIZE((sizeof(struct ctl_reply_hdr)) + (256 * 1024)) - ctl_reply_size)) { |
| 3453 | /* remember line drops for later report */ |
| 3454 | membuf_drop = 1; |
| 3455 | return; |
| 3456 | } |
| 3457 | memcpy(ctl_reply + ctl_reply_size, line, l); |
| 3458 | memcpy(ctl_reply + ctl_reply_size + l, "\n", 2); |
| 3459 | ctl_reply_size += l + 1; |
| 3460 | event_add(ev_ctlwrite, NULL((void*)0)); |
| 3461 | } |