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 1.280 2024/01/06 19:34:54 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 | #include "parsemsg.h" |
123 | |
124 | char *ConfFile = _PATH_LOGCONF"/etc/syslog.conf"; |
125 | const char ctty[] = _PATH_CONSOLE"/dev/console"; |
126 | |
127 | #define MAXUNAMES20 20 /* maximum number of user names */ |
128 | |
129 | |
130 | /* |
131 | * Flags to logmsg(). |
132 | */ |
133 | |
134 | #define IGN_CONS0x001 0x001 /* don't print on console */ |
135 | #define SYNC_FILE0x002 0x002 /* do fsync on file after printing */ |
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 event f_ev; |
160 | struct tls *f_ctx; |
161 | char *f_ipproto; |
162 | char *f_host; |
163 | char *f_port; |
164 | int f_retrywait; |
165 | } f_forw; /* forwarding address */ |
166 | char f_fname[PATH_MAX1024]; |
167 | struct { |
168 | char f_mname[MAX_MEMBUF_NAME64]; |
169 | struct ringbuf *f_rb; |
170 | int f_overflow; |
171 | int f_attached; |
172 | size_t f_len; |
173 | } f_mb; /* Memory buffer */ |
174 | } f_un; |
175 | char f_prevline[MAXSVLINE120]; /* last message logged */ |
176 | char f_lasttime[33]; /* time of last occurrence */ |
177 | char f_prevhost[HOST_NAME_MAX255+1]; /* host from which recd. */ |
178 | int f_prevpri; /* pri of f_prevline */ |
179 | int f_prevlen; /* length of f_prevline */ |
180 | int f_prevcount; /* repetition cnt of prevline */ |
181 | unsigned int f_repeatcount; /* number of "repeated" msgs */ |
182 | int f_quick; /* abort when matched */ |
183 | int f_dropped; /* warn, dropped message */ |
184 | time_t f_lasterrtime; /* last error was reported */ |
185 | }; |
186 | |
187 | /* |
188 | * Intervals at which we flush out "message repeated" messages, |
189 | * in seconds after previous message is logged. After each flush, |
190 | * we move to the next interval until we reach the largest. |
191 | */ |
192 | int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ |
193 | #define MAXREPEAT((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) |
194 | #define REPEATTIME(f)((f)->f_time + repeatinterval[(f)->f_repeatcount]) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) |
195 | #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)) \ |
196 | (f)->f_repeatcount = MAXREPEAT((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1); \ |
197 | } |
198 | |
199 | /* values for f_type */ |
200 | #define F_UNUSED0 0 /* unused entry */ |
201 | #define F_FILE1 1 /* regular file */ |
202 | #define F_TTY2 2 /* terminal */ |
203 | #define F_CONSOLE3 3 /* console terminal */ |
204 | #define F_FORWUDP4 4 /* remote machine via UDP */ |
205 | #define F_USERS5 5 /* list of users */ |
206 | #define F_WALL6 6 /* everyone logged on */ |
207 | #define F_MEMBUF7 7 /* memory buffer */ |
208 | #define F_PIPE8 8 /* pipe to external program */ |
209 | #define F_FORWTCP9 9 /* remote machine via TCP */ |
210 | #define F_FORWTLS10 10 /* remote machine via TLS */ |
211 | |
212 | char *TypeNames[] = { |
213 | "UNUSED", "FILE", "TTY", "CONSOLE", |
214 | "FORWUDP", "USERS", "WALL", "MEMBUF", |
215 | "PIPE", "FORWTCP", "FORWTLS", |
216 | }; |
217 | |
218 | SIMPLEQ_HEAD(filed_list, filed)struct filed_list { struct filed *sqh_first; struct filed **sqh_last ; } Files; |
219 | struct filed consfile; |
220 | |
221 | int Debug; /* debug flag */ |
222 | int Foreground; /* run in foreground, instead of daemonizing */ |
223 | char LocalHostName[HOST_NAME_MAX255+1]; /* our hostname */ |
224 | int Started = 0; /* set after privsep */ |
225 | int Initialized = 0; /* set when we have initialized ourselves */ |
226 | |
227 | int MarkInterval = 20 * 60; /* interval between marks in seconds */ |
228 | int MarkSeq = 0; /* mark sequence number */ |
229 | int PrivChild = 0; /* Exec the privileged parent process */ |
230 | int Repeat = 0; /* 0 msg repeated, 1 in files only, 2 never */ |
231 | int SecureMode = 1; /* when true, speak only unix domain socks */ |
232 | int NoDNS = 0; /* when true, refrain from doing DNS lookups */ |
233 | int ZuluTime = 0; /* display date and time in UTC ISO format */ |
234 | int IncludeHostname = 0; /* include RFC 3164 hostnames when forwarding */ |
235 | int Family = PF_UNSPEC0; /* protocol family, may disable IPv4 or IPv6 */ |
236 | |
237 | struct tls *server_ctx; |
238 | struct tls_config *client_config, *server_config; |
239 | const char *CAfile = "/etc/ssl/cert.pem"; /* file containing CA certificates */ |
240 | int NoVerify = 0; /* do not verify TLS server x509 certificate */ |
241 | const char *ClientCertfile = NULL((void *)0); |
242 | const char *ClientKeyfile = NULL((void *)0); |
243 | const char *ServerCAfile = NULL((void *)0); |
244 | int udpsend_dropped = 0; /* messages dropped due to UDP not ready */ |
245 | int tcpbuf_dropped = 0; /* count messages dropped from TCP or TLS */ |
246 | int file_dropped = 0; /* messages dropped due to file system full */ |
247 | int init_dropped = 0; /* messages dropped during initialization */ |
248 | |
249 | #define CTL_READING_CMD1 1 |
250 | #define CTL_WRITING_REPLY2 2 |
251 | #define CTL_WRITING_CONT_REPLY3 3 |
252 | int ctl_state = 0; /* What the control socket is up to */ |
253 | int membuf_drop = 0; /* logs dropped in continuous membuf read */ |
254 | |
255 | /* |
256 | * Client protocol NB. all numeric fields in network byte order |
257 | */ |
258 | #define CTL_VERSION2 2 |
259 | |
260 | /* Request */ |
261 | struct { |
262 | u_int32_t version; |
263 | #define CMD_READ1 1 /* Read out log */ |
264 | #define CMD_READ_CLEAR2 2 /* Read and clear log */ |
265 | #define CMD_CLEAR3 3 /* Clear log */ |
266 | #define CMD_LIST4 4 /* List available logs */ |
267 | #define CMD_FLAGS5 5 /* Query flags only */ |
268 | #define CMD_READ_CONT6 6 /* Read out log continuously */ |
269 | u_int32_t cmd; |
270 | u_int32_t lines; |
271 | char logname[MAX_MEMBUF_NAME64]; |
272 | } ctl_cmd; |
273 | |
274 | size_t ctl_cmd_bytes = 0; /* number of bytes of ctl_cmd read */ |
275 | |
276 | /* Reply */ |
277 | struct ctl_reply_hdr { |
278 | u_int32_t version; |
279 | #define CTL_HDR_FLAG_OVERFLOW0x01 0x01 |
280 | u_int32_t flags; |
281 | /* Reply text follows, up to MAX_MEMBUF long */ |
282 | }; |
283 | |
284 | #define CTL_HDR_LEN(sizeof(struct ctl_reply_hdr)) (sizeof(struct ctl_reply_hdr)) |
285 | #define CTL_REPLY_MAXSIZE((sizeof(struct ctl_reply_hdr)) + (256 * 1024)) (CTL_HDR_LEN(sizeof(struct ctl_reply_hdr)) + MAX_MEMBUF(256 * 1024)) |
286 | #define CTL_REPLY_SIZE(strlen(reply_text) + (sizeof(struct ctl_reply_hdr))) (strlen(reply_text) + CTL_HDR_LEN(sizeof(struct ctl_reply_hdr))) |
287 | |
288 | char *ctl_reply = NULL((void *)0); /* Buffer for control connection reply */ |
289 | char *reply_text; /* Start of reply text in buffer */ |
290 | size_t ctl_reply_size = 0; /* Number of bytes used in reply */ |
291 | size_t ctl_reply_offset = 0; /* Number of bytes of reply written so far */ |
292 | |
293 | char *linebuf; |
294 | int linesize; |
295 | |
296 | int fd_ctlconn, fd_udp, fd_udp6, send_udp, send_udp6; |
297 | struct event *ev_ctlaccept, *ev_ctlread, *ev_ctlwrite; |
298 | |
299 | struct peer { |
300 | struct buffertls p_buftls; |
301 | struct bufferevent *p_bufev; |
302 | struct tls *p_ctx; |
303 | char *p_peername; |
304 | char *p_hostname; |
305 | int p_fd; |
306 | }; |
307 | char hostname_unknown[] = "???"; |
308 | |
309 | void klog_readcb(int, short, void *); |
310 | void udp_readcb(int, short, void *); |
311 | void unix_readcb(int, short, void *); |
312 | int reserve_accept4(int, int, struct event *, |
313 | void (*)(int, short, void *), struct sockaddr *, socklen_t *, int); |
314 | void tcp_acceptcb(int, short, void *); |
315 | void tls_acceptcb(int, short, void *); |
316 | void acceptcb(int, short, void *, int); |
317 | int octet_counting(struct evbuffer *, char **, int); |
318 | int non_transparent_framing(struct evbuffer *, char **); |
319 | void tcp_readcb(struct bufferevent *, void *); |
320 | void tcp_closecb(struct bufferevent *, short, void *); |
321 | int tcp_socket(struct filed *); |
322 | void tcp_dropcb(struct bufferevent *, void *); |
323 | void tcp_writecb(struct bufferevent *, void *); |
324 | void tcp_errorcb(struct bufferevent *, short, void *); |
325 | void tcp_connectcb(int, short, void *); |
326 | int loghost_resolve(struct filed *); |
327 | void loghost_retry(struct filed *); |
328 | void udp_resolvecb(int, short, void *); |
329 | int tcpbuf_countmsg(struct bufferevent *bufev); |
330 | void die_signalcb(int, short, void *); |
331 | void mark_timercb(int, short, void *); |
332 | void init_signalcb(int, short, void *); |
333 | void ctlsock_acceptcb(int, short, void *); |
334 | void ctlconn_readcb(int, short, void *); |
335 | void ctlconn_writecb(int, short, void *); |
336 | void ctlconn_logto(char *); |
337 | void ctlconn_cleanup(void); |
338 | |
339 | struct filed *cfline(char *, char *, char *); |
340 | void cvthname(struct sockaddr *, char *, size_t); |
341 | int decode(const char *, const CODE *); |
342 | void markit(void); |
343 | void fprintlog(struct filed *, int, char *); |
344 | void dropped_warn(int *, const char *); |
345 | void init(void); |
346 | void logevent(int, const char *); |
347 | void logmsg(struct msg *, int, char *); |
348 | struct filed *find_dup(struct filed *); |
349 | void printline(char *, char *); |
350 | void printsys(char *); |
351 | void current_time(char *); |
352 | void usage(void); |
353 | void wallmsg(struct filed *, struct iovec *); |
354 | int loghost_parse(char *, char **, char **, char **); |
355 | int getmsgbufsize(void); |
356 | void address_alloc(const char *, const char *, char ***, char ***, int *); |
357 | int socket_bind(const char *, const char *, const char *, int, |
358 | int *, int *); |
359 | int unix_socket(char *, int, mode_t); |
360 | void double_sockbuf(int, int, int); |
361 | void set_sockbuf(int); |
362 | void set_keepalive(int); |
363 | void tailify_replytext(char *, int); |
364 | |
365 | int |
366 | main(int argc, char *argv[]) |
367 | { |
368 | struct timeval to; |
369 | struct event *ev_klog, *ev_sendsys, *ev_udp, *ev_udp6, |
370 | *ev_bind, *ev_listen, *ev_tls, *ev_unix, |
371 | *ev_hup, *ev_int, *ev_quit, *ev_term, *ev_mark; |
372 | sigset_t sigmask; |
373 | const char *errstr; |
374 | char *p; |
375 | int ch, i; |
376 | int lockpipe[2] = { -1, -1}, pair[2], nullfd, fd; |
377 | int fd_ctlsock, fd_klog, fd_sendsys, *fd_bind, *fd_listen; |
378 | int *fd_tls, *fd_unix, nunix, nbind, nlisten, ntls; |
379 | char **path_unix, *path_ctlsock; |
380 | char **bind_host, **bind_port, **listen_host, **listen_port; |
381 | char *tls_hostport, **tls_host, **tls_port; |
382 | |
383 | /* block signal until handler is set up */ |
384 | sigemptyset(&sigmask); |
385 | sigaddset(&sigmask, SIGHUP1); |
386 | if (sigprocmask(SIG_SETMASK3, &sigmask, NULL((void *)0)) == -1) |
387 | err(1, "sigprocmask block"); |
388 | |
389 | if ((path_unix = malloc(sizeof(*path_unix))) == NULL((void *)0)) |
390 | err(1, "malloc %s", _PATH_LOG"/dev/log"); |
391 | path_unix[0] = _PATH_LOG"/dev/log"; |
392 | nunix = 1; |
393 | path_ctlsock = NULL((void *)0); |
394 | |
395 | bind_host = listen_host = tls_host = NULL((void *)0); |
396 | bind_port = listen_port = tls_port = NULL((void *)0); |
397 | tls_hostport = NULL((void *)0); |
398 | nbind = nlisten = ntls = 0; |
399 | |
400 | while ((ch = getopt(argc, argv, |
401 | "46a:C:c:dFf:hK:k:m:nP:p:rS:s:T:U:uVZ")) != -1) { |
402 | switch (ch) { |
403 | case '4': /* disable IPv6 */ |
404 | Family = PF_INET2; |
405 | break; |
406 | case '6': /* disable IPv4 */ |
407 | Family = PF_INET624; |
408 | break; |
409 | case 'a': |
410 | if ((path_unix = reallocarray(path_unix, nunix + 1, |
411 | sizeof(*path_unix))) == NULL((void *)0)) |
412 | err(1, "unix path %s", optarg); |
413 | path_unix[nunix++] = optarg; |
414 | break; |
415 | case 'C': /* file containing CA certificates */ |
416 | CAfile = optarg; |
417 | break; |
418 | case 'c': /* file containing client certificate */ |
419 | ClientCertfile = optarg; |
420 | break; |
421 | case 'd': /* debug */ |
422 | Debug++; |
423 | break; |
424 | case 'F': /* foreground */ |
425 | Foreground = 1; |
426 | break; |
427 | case 'f': /* configuration file */ |
428 | ConfFile = optarg; |
429 | break; |
430 | case 'h': /* RFC 3164 hostnames */ |
431 | IncludeHostname = 1; |
432 | break; |
433 | case 'K': /* verify client with CA file */ |
434 | ServerCAfile = optarg; |
435 | break; |
436 | case 'k': /* file containing client key */ |
437 | ClientKeyfile = optarg; |
438 | break; |
439 | case 'm': /* mark interval */ |
440 | MarkInterval = strtonum(optarg, 0, 365*24*60, &errstr); |
441 | if (errstr) |
442 | errx(1, "mark_interval %s: %s", errstr, optarg); |
443 | MarkInterval *= 60; |
444 | break; |
445 | case 'n': /* don't do DNS lookups */ |
446 | NoDNS = 1; |
447 | break; |
448 | case 'P': /* used internally, exec the parent */ |
449 | PrivChild = strtonum(optarg, 2, INT_MAX0x7fffffff, &errstr); |
450 | if (errstr) |
451 | errx(1, "priv child %s: %s", errstr, optarg); |
452 | break; |
453 | case 'p': /* path */ |
454 | path_unix[0] = optarg; |
455 | break; |
456 | case 'r': |
457 | Repeat++; |
458 | break; |
459 | case 'S': /* allow tls and listen on address */ |
460 | if (tls_hostport == NULL((void *)0)) |
461 | tls_hostport = optarg; |
462 | address_alloc("tls", optarg, &tls_host, &tls_port, |
463 | &ntls); |
464 | break; |
465 | case 's': |
466 | path_ctlsock = optarg; |
467 | break; |
468 | case 'T': /* allow tcp and listen on address */ |
469 | address_alloc("listen", optarg, &listen_host, |
470 | &listen_port, &nlisten); |
471 | break; |
472 | case 'U': /* allow udp only from address */ |
473 | address_alloc("bind", optarg, &bind_host, &bind_port, |
474 | &nbind); |
475 | break; |
476 | case 'u': /* allow udp input port */ |
477 | SecureMode = 0; |
478 | break; |
479 | case 'V': /* do not verify certificates */ |
480 | NoVerify = 1; |
481 | break; |
482 | case 'Z': /* time stamps in UTC ISO format */ |
483 | ZuluTime = 1; |
484 | break; |
485 | default: |
486 | usage(); |
487 | } |
488 | } |
489 | if (argc != optind) |
490 | usage(); |
491 | |
492 | log_init(Debug, LOG_SYSLOG(5<<3)); |
493 | log_procinit("syslogd"); |
494 | if (Debug) |
495 | setvbuf(stdout(&__sF[1]), NULL((void *)0), _IOLBF1, 0); |
496 | |
497 | if ((nullfd = open(_PATH_DEVNULL"/dev/null", O_RDWR0x0002)) == -1) |
498 | fatal("open %s", _PATH_DEVNULL"/dev/null"); |
499 | for (fd = nullfd + 1; fd <= STDERR_FILENO2; fd++) { |
500 | if (fcntl(fd, F_GETFL3) == -1 && errno(*__errno()) == EBADF9) |
501 | if (dup2(nullfd, fd) == -1) |
502 | fatal("dup2 null"); |
503 | } |
504 | |
505 | if (PrivChild > 1) |
506 | priv_exec(ConfFile, NoDNS, PrivChild, argc, argv); |
507 | |
508 | consfile.f_type = F_CONSOLE3; |
509 | (void)strlcpy(consfile.f_un.f_fname, ctty, |
510 | sizeof(consfile.f_un.f_fname)); |
511 | consfile.f_file = open(consfile.f_un.f_fname, O_WRONLY0x0001|O_NONBLOCK0x0004); |
512 | if (consfile.f_file == -1) |
513 | log_warn("open %s", consfile.f_un.f_fname); |
514 | |
515 | if (gethostname(LocalHostName, sizeof(LocalHostName)) == -1 || |
516 | LocalHostName[0] == '\0') |
517 | strlcpy(LocalHostName, "-", sizeof(LocalHostName)); |
518 | else if ((p = strchr(LocalHostName, '.')) != NULL((void *)0)) |
519 | *p = '\0'; |
520 | |
521 | /* Reserve space for kernel message buffer plus buffer full message. */ |
522 | linesize = getmsgbufsize() + 64; |
523 | if (linesize < LOG_MAXLINE8192) |
524 | linesize = LOG_MAXLINE8192; |
525 | linesize++; |
526 | if ((linebuf = malloc(linesize)) == NULL((void *)0)) |
527 | fatal("allocate line buffer"); |
528 | |
529 | if (socket_bind("udp", NULL((void *)0), "syslog", SecureMode, |
530 | &fd_udp, &fd_udp6) == -1) |
531 | log_warnx("socket bind * failed"); |
532 | if ((fd_bind = reallocarray(NULL((void *)0), nbind, sizeof(*fd_bind))) == NULL((void *)0)) |
533 | fatal("allocate bind fd"); |
534 | for (i = 0; i < nbind; i++) { |
535 | if (socket_bind("udp", bind_host[i], bind_port[i], 0, |
536 | &fd_bind[i], &fd_bind[i]) == -1) |
537 | log_warnx("socket bind udp failed"); |
538 | } |
539 | if ((fd_listen = reallocarray(NULL((void *)0), nlisten, sizeof(*fd_listen))) |
540 | == NULL((void *)0)) |
541 | fatal("allocate listen fd"); |
542 | for (i = 0; i < nlisten; i++) { |
543 | if (socket_bind("tcp", listen_host[i], listen_port[i], 0, |
544 | &fd_listen[i], &fd_listen[i]) == -1) |
545 | log_warnx("socket listen tcp failed"); |
546 | } |
547 | if ((fd_tls = reallocarray(NULL((void *)0), ntls, sizeof(*fd_tls))) == NULL((void *)0)) |
548 | fatal("allocate tls fd"); |
549 | for (i = 0; i < ntls; i++) { |
550 | if (socket_bind("tls", tls_host[i], tls_port[i], 0, |
551 | &fd_tls[i], &fd_tls[i]) == -1) |
552 | log_warnx("socket listen tls failed"); |
553 | } |
554 | |
555 | if ((fd_unix = reallocarray(NULL((void *)0), nunix, sizeof(*fd_unix))) == NULL((void *)0)) |
556 | fatal("allocate unix fd"); |
557 | for (i = 0; i < nunix; i++) { |
558 | fd_unix[i] = unix_socket(path_unix[i], SOCK_DGRAM2, 0666); |
559 | if (fd_unix[i] == -1) { |
560 | if (i == 0) |
561 | log_warnx("log socket %s failed", path_unix[i]); |
562 | continue; |
563 | } |
564 | double_sockbuf(fd_unix[i], SO_RCVBUF0x1002, 0); |
565 | } |
566 | |
567 | if (socketpair(AF_UNIX1, SOCK_DGRAM2, PF_UNSPEC0, pair) == -1) { |
568 | log_warn("socketpair sendsyslog"); |
569 | fd_sendsys = -1; |
570 | } else { |
571 | /* |
572 | * Avoid to lose messages from sendsyslog(2). A larger |
573 | * 1 MB socket buffer compensates bursts. |
574 | */ |
575 | double_sockbuf(pair[0], SO_RCVBUF0x1002, 1<<20); |
576 | double_sockbuf(pair[1], SO_SNDBUF0x1001, 1<<20); |
577 | fd_sendsys = pair[0]; |
578 | } |
579 | |
580 | fd_ctlsock = fd_ctlconn = -1; |
581 | if (path_ctlsock != NULL((void *)0)) { |
582 | fd_ctlsock = unix_socket(path_ctlsock, SOCK_STREAM1, 0600); |
583 | if (fd_ctlsock == -1) { |
584 | log_warnx("control socket %s failed", path_ctlsock); |
585 | } else { |
586 | if (listen(fd_ctlsock, 5) == -1) { |
587 | log_warn("listen control socket"); |
588 | close(fd_ctlsock); |
589 | fd_ctlsock = -1; |
590 | } |
591 | } |
592 | } |
593 | |
594 | if ((fd_klog = open(_PATH_KLOG"/dev/klog", O_RDONLY0x0000)) == -1) { |
595 | log_warn("open %s", _PATH_KLOG"/dev/klog"); |
596 | } else if (fd_sendsys != -1) { |
597 | /* Use /dev/klog to register sendsyslog(2) receiver. */ |
598 | if (ioctl(fd_klog, LIOCSFD((unsigned long)0x80000000 | ((sizeof(int) & 0x1fff) << 16) | ((('l')) << 8) | ((127))), &pair[1]) == -1) |
599 | log_warn("ioctl klog LIOCSFD sendsyslog"); |
600 | } |
601 | if (fd_sendsys != -1) |
602 | close(pair[1]); |
603 | |
604 | if ((client_config = tls_config_new()) == NULL((void *)0)) |
605 | log_warn("tls_config_new client"); |
606 | if (tls_hostport) { |
607 | if ((server_config = tls_config_new()) == NULL((void *)0)) |
608 | log_warn("tls_config_new server"); |
609 | if ((server_ctx = tls_server()) == NULL((void *)0)) { |
610 | log_warn("tls_server"); |
611 | for (i = 0; i < ntls; i++) |
612 | close(fd_tls[i]); |
613 | free(fd_tls); |
614 | fd_tls = NULL((void *)0); |
615 | free(tls_host); |
616 | free(tls_port); |
617 | tls_host = tls_port = NULL((void *)0); |
618 | ntls = 0; |
619 | } |
620 | } |
621 | |
622 | if (client_config) { |
623 | if (NoVerify) { |
624 | tls_config_insecure_noverifycert(client_config); |
625 | tls_config_insecure_noverifyname(client_config); |
626 | } else { |
627 | if (tls_config_set_ca_file(client_config, |
628 | CAfile) == -1) { |
629 | log_warnx("load client TLS CA: %s", |
630 | tls_config_error(client_config)); |
631 | /* avoid reading default certs in chroot */ |
632 | tls_config_set_ca_mem(client_config, "", 0); |
633 | } else |
634 | log_debug("CAfile %s", CAfile); |
635 | } |
636 | if (ClientCertfile && ClientKeyfile) { |
637 | if (tls_config_set_cert_file(client_config, |
638 | ClientCertfile) == -1) |
639 | log_warnx("load client TLS cert: %s", |
640 | tls_config_error(client_config)); |
641 | else |
642 | log_debug("ClientCertfile %s", ClientCertfile); |
643 | |
644 | if (tls_config_set_key_file(client_config, |
645 | ClientKeyfile) == -1) |
646 | log_warnx("load client TLS key: %s", |
647 | tls_config_error(client_config)); |
648 | else |
649 | log_debug("ClientKeyfile %s", ClientKeyfile); |
650 | } else if (ClientCertfile || ClientKeyfile) { |
651 | log_warnx("options -c and -k must be used together"); |
652 | } |
653 | if (tls_config_set_protocols(client_config, |
654 | TLS_PROTOCOLS_ALL((1 << 3)|(1 << 4))) != 0) |
655 | log_warnx("set client TLS protocols: %s", |
656 | tls_config_error(client_config)); |
657 | if (tls_config_set_ciphers(client_config, "all") != 0) |
658 | log_warnx("set client TLS ciphers: %s", |
659 | tls_config_error(client_config)); |
660 | } |
661 | if (server_config && server_ctx) { |
662 | const char *names[2]; |
663 | |
664 | names[0] = tls_hostport; |
665 | names[1] = tls_host[0]; |
666 | |
667 | for (i = 0; i < 2; i++) { |
668 | if (asprintf(&p, "/etc/ssl/private/%s.key", names[i]) |
669 | == -1) |
670 | continue; |
671 | if (tls_config_set_key_file(server_config, p) == -1) { |
672 | log_warnx("load server TLS key: %s", |
673 | tls_config_error(server_config)); |
674 | free(p); |
675 | continue; |
676 | } |
677 | log_debug("Keyfile %s", p); |
678 | free(p); |
679 | if (asprintf(&p, "/etc/ssl/%s.crt", names[i]) == -1) |
680 | continue; |
681 | if (tls_config_set_cert_file(server_config, p) == -1) { |
682 | log_warnx("load server TLS cert: %s", |
683 | tls_config_error(server_config)); |
684 | free(p); |
685 | continue; |
686 | } |
687 | log_debug("Certfile %s", p); |
688 | free(p); |
689 | break; |
690 | } |
691 | |
692 | if (ServerCAfile) { |
693 | if (tls_config_set_ca_file(server_config, |
694 | ServerCAfile) == -1) { |
695 | log_warnx("load server TLS CA: %s", |
696 | tls_config_error(server_config)); |
697 | /* avoid reading default certs in chroot */ |
698 | tls_config_set_ca_mem(server_config, "", 0); |
699 | } else |
700 | log_debug("Server CAfile %s", ServerCAfile); |
701 | tls_config_verify_client(server_config); |
702 | } |
703 | if (tls_config_set_protocols(server_config, |
704 | TLS_PROTOCOLS_ALL((1 << 3)|(1 << 4))) != 0) |
705 | log_warnx("set server TLS protocols: %s", |
706 | tls_config_error(server_config)); |
707 | if (tls_config_set_ciphers(server_config, "compat") != 0) |
708 | log_warnx("Set server TLS ciphers: %s", |
709 | tls_config_error(server_config)); |
710 | if (tls_configure(server_ctx, server_config) != 0) { |
711 | log_warnx("tls_configure server: %s", |
712 | tls_error(server_ctx)); |
713 | tls_free(server_ctx); |
714 | server_ctx = NULL((void *)0); |
715 | for (i = 0; i < ntls; i++) |
716 | close(fd_tls[i]); |
717 | free(fd_tls); |
718 | fd_tls = NULL((void *)0); |
719 | free(tls_host); |
720 | free(tls_port); |
721 | tls_host = tls_port = NULL((void *)0); |
722 | ntls = 0; |
723 | } |
724 | } |
725 | |
726 | log_debug("off & running...."); |
727 | |
728 | if (!Debug && !Foreground) { |
729 | char c; |
730 | |
731 | pipe(lockpipe); |
732 | |
733 | switch(fork()) { |
734 | case -1: |
735 | err(1, "fork"); |
736 | case 0: |
737 | setsid(); |
738 | close(lockpipe[0]); |
739 | break; |
740 | default: |
741 | close(lockpipe[1]); |
742 | read(lockpipe[0], &c, 1); |
743 | _exit(0); |
744 | } |
745 | } |
746 | |
747 | /* tuck my process id away */ |
748 | if (!Debug) { |
749 | FILE *fp; |
750 | |
751 | fp = fopen(_PATH_LOGPID"/var/run/syslog.pid", "w"); |
752 | if (fp != NULL((void *)0)) { |
753 | fprintf(fp, "%ld\n", (long)getpid()); |
754 | (void) fclose(fp); |
755 | } |
756 | } |
757 | |
758 | /* Privilege separation begins here */ |
759 | priv_init(lockpipe[1], nullfd, argc, argv); |
760 | |
761 | if (pledge("stdio unix inet recvfd", NULL((void *)0)) == -1) |
762 | err(1, "pledge"); |
763 | |
764 | Started = 1; |
765 | |
766 | /* Process is now unprivileged and inside a chroot */ |
767 | if (Debug) |
768 | event_set_log_callback(logevent); |
769 | event_init(); |
770 | |
771 | if ((ev_ctlaccept = malloc(sizeof(struct event))) == NULL((void *)0) || |
772 | (ev_ctlread = malloc(sizeof(struct event))) == NULL((void *)0) || |
773 | (ev_ctlwrite = malloc(sizeof(struct event))) == NULL((void *)0) || |
774 | (ev_klog = malloc(sizeof(struct event))) == NULL((void *)0) || |
775 | (ev_sendsys = malloc(sizeof(struct event))) == NULL((void *)0) || |
776 | (ev_udp = malloc(sizeof(struct event))) == NULL((void *)0) || |
777 | (ev_udp6 = malloc(sizeof(struct event))) == NULL((void *)0) || |
778 | (ev_bind = reallocarray(NULL((void *)0), nbind, sizeof(struct event))) |
779 | == NULL((void *)0) || |
780 | (ev_listen = reallocarray(NULL((void *)0), nlisten, sizeof(struct event))) |
781 | == NULL((void *)0) || |
782 | (ev_tls = reallocarray(NULL((void *)0), ntls, sizeof(struct event))) |
783 | == NULL((void *)0) || |
784 | (ev_unix = reallocarray(NULL((void *)0), nunix, sizeof(struct event))) |
785 | == NULL((void *)0) || |
786 | (ev_hup = malloc(sizeof(struct event))) == NULL((void *)0) || |
787 | (ev_int = malloc(sizeof(struct event))) == NULL((void *)0) || |
788 | (ev_quit = malloc(sizeof(struct event))) == NULL((void *)0) || |
789 | (ev_term = malloc(sizeof(struct event))) == NULL((void *)0) || |
790 | (ev_mark = malloc(sizeof(struct event))) == NULL((void *)0)) |
791 | err(1, "malloc"); |
792 | |
793 | event_set(ev_ctlaccept, fd_ctlsock, EV_READ0x02|EV_PERSIST0x10, |
794 | ctlsock_acceptcb, ev_ctlaccept); |
795 | event_set(ev_ctlread, fd_ctlconn, EV_READ0x02|EV_PERSIST0x10, |
796 | ctlconn_readcb, ev_ctlread); |
797 | event_set(ev_ctlwrite, fd_ctlconn, EV_WRITE0x04|EV_PERSIST0x10, |
798 | ctlconn_writecb, ev_ctlwrite); |
799 | event_set(ev_klog, fd_klog, EV_READ0x02|EV_PERSIST0x10, klog_readcb, ev_klog); |
800 | event_set(ev_sendsys, fd_sendsys, EV_READ0x02|EV_PERSIST0x10, unix_readcb, |
801 | ev_sendsys); |
802 | event_set(ev_udp, fd_udp, EV_READ0x02|EV_PERSIST0x10, udp_readcb, ev_udp); |
803 | event_set(ev_udp6, fd_udp6, EV_READ0x02|EV_PERSIST0x10, udp_readcb, ev_udp6); |
804 | for (i = 0; i < nbind; i++) |
805 | event_set(&ev_bind[i], fd_bind[i], EV_READ0x02|EV_PERSIST0x10, |
806 | udp_readcb, &ev_bind[i]); |
807 | for (i = 0; i < nlisten; i++) |
808 | event_set(&ev_listen[i], fd_listen[i], EV_READ0x02|EV_PERSIST0x10, |
809 | tcp_acceptcb, &ev_listen[i]); |
810 | for (i = 0; i < ntls; i++) |
811 | event_set(&ev_tls[i], fd_tls[i], EV_READ0x02|EV_PERSIST0x10, |
812 | tls_acceptcb, &ev_tls[i]); |
813 | for (i = 0; i < nunix; i++) |
814 | event_set(&ev_unix[i], fd_unix[i], EV_READ0x02|EV_PERSIST0x10, |
815 | unix_readcb, &ev_unix[i]); |
816 | |
817 | signal_set(ev_hup, SIGHUP, init_signalcb, ev_hup)event_set(ev_hup, 1, 0x08|0x10, init_signalcb, ev_hup); |
818 | signal_set(ev_int, SIGINT, die_signalcb, ev_int)event_set(ev_int, 2, 0x08|0x10, die_signalcb, ev_int); |
819 | signal_set(ev_quit, SIGQUIT, die_signalcb, ev_quit)event_set(ev_quit, 3, 0x08|0x10, die_signalcb, ev_quit); |
820 | signal_set(ev_term, SIGTERM, die_signalcb, ev_term)event_set(ev_term, 15, 0x08|0x10, die_signalcb, ev_term); |
821 | |
822 | evtimer_set(ev_mark, mark_timercb, ev_mark)event_set(ev_mark, -1, 0, mark_timercb, ev_mark); |
823 | |
824 | init(); |
825 | |
826 | /* Allocate ctl socket reply buffer if we have a ctl socket */ |
827 | if (fd_ctlsock != -1 && |
828 | (ctl_reply = malloc(CTL_REPLY_MAXSIZE((sizeof(struct ctl_reply_hdr)) + (256 * 1024)))) == NULL((void *)0)) |
829 | fatal("allocate control socket reply buffer"); |
830 | reply_text = ctl_reply + CTL_HDR_LEN(sizeof(struct ctl_reply_hdr)); |
831 | |
832 | if (!Debug) { |
833 | close(lockpipe[1]); |
834 | dup2(nullfd, STDIN_FILENO0); |
835 | dup2(nullfd, STDOUT_FILENO1); |
836 | dup2(nullfd, STDERR_FILENO2); |
837 | } |
838 | if (nullfd > 2) |
839 | close(nullfd); |
840 | |
841 | /* |
842 | * Signal to the priv process that the initial config parsing is done |
843 | * so that it will reject any future attempts to open more files |
844 | */ |
845 | priv_config_parse_done(); |
846 | |
847 | if (fd_ctlsock != -1) |
848 | event_add(ev_ctlaccept, NULL((void *)0)); |
849 | if (fd_klog != -1) |
850 | event_add(ev_klog, NULL((void *)0)); |
851 | if (fd_sendsys != -1) |
852 | event_add(ev_sendsys, NULL((void *)0)); |
853 | if (!SecureMode) { |
854 | if (fd_udp != -1) |
855 | event_add(ev_udp, NULL((void *)0)); |
856 | if (fd_udp6 != -1) |
857 | event_add(ev_udp6, NULL((void *)0)); |
858 | } |
859 | for (i = 0; i < nbind; i++) |
860 | if (fd_bind[i] != -1) |
861 | event_add(&ev_bind[i], NULL((void *)0)); |
862 | for (i = 0; i < nlisten; i++) |
863 | if (fd_listen[i] != -1) |
864 | event_add(&ev_listen[i], NULL((void *)0)); |
865 | for (i = 0; i < ntls; i++) |
866 | if (fd_tls[i] != -1) |
867 | event_add(&ev_tls[i], NULL((void *)0)); |
868 | for (i = 0; i < nunix; i++) |
869 | if (fd_unix[i] != -1) |
870 | event_add(&ev_unix[i], NULL((void *)0)); |
871 | |
872 | signal_add(ev_hup, NULL)event_add(ev_hup, ((void *)0)); |
873 | signal_add(ev_term, NULL)event_add(ev_term, ((void *)0)); |
874 | if (Debug || Foreground) { |
875 | signal_add(ev_int, NULL)event_add(ev_int, ((void *)0)); |
876 | signal_add(ev_quit, NULL)event_add(ev_quit, ((void *)0)); |
877 | } else { |
878 | (void)signal(SIGINT2, SIG_IGN(void (*)(int))1); |
879 | (void)signal(SIGQUIT3, SIG_IGN(void (*)(int))1); |
880 | } |
881 | (void)signal(SIGCHLD20, SIG_IGN(void (*)(int))1); |
882 | (void)signal(SIGPIPE13, SIG_IGN(void (*)(int))1); |
883 | |
884 | to.tv_sec = TIMERINTVL30; |
885 | to.tv_usec = 0; |
886 | evtimer_add(ev_mark, &to)event_add(ev_mark, &to); |
887 | |
888 | log_info(LOG_INFO6, "start"); |
889 | log_debug("syslogd: started"); |
890 | |
891 | sigemptyset(&sigmask); |
892 | if (sigprocmask(SIG_SETMASK3, &sigmask, NULL((void *)0)) == -1) |
893 | err(1, "sigprocmask unblock"); |
894 | |
895 | /* Send message via libc, flushes log stash in kernel. */ |
896 | openlog("syslogd", LOG_PID0x01, LOG_SYSLOG(5<<3)); |
897 | syslog(LOG_DEBUG7, "running"); |
898 | |
899 | event_dispatch(); |
900 | /* NOTREACHED */ |
901 | return (0); |
902 | } |
903 | |
904 | void |
905 | address_alloc(const char *name, const char *address, char ***host, |
906 | char ***port, int *num) |
907 | { |
908 | char *p; |
909 | |
910 | /* do not care about memory leak, argv has to be preserved */ |
911 | if ((p = strdup(address)) == NULL((void *)0)) |
912 | err(1, "%s address %s", name, address); |
913 | if ((*host = reallocarray(*host, *num + 1, sizeof(**host))) == NULL((void *)0)) |
914 | err(1, "%s host %s", name, address); |
915 | if ((*port = reallocarray(*port, *num + 1, sizeof(**port))) == NULL((void *)0)) |
916 | err(1, "%s port %s", name, address); |
917 | if (loghost_parse(p, NULL((void *)0), *host + *num, *port + *num) == -1) |
918 | errx(1, "bad %s address: %s", name, address); |
919 | (*num)++; |
920 | } |
921 | |
922 | int |
923 | socket_bind(const char *proto, const char *host, const char *port, |
924 | int shutread, int *fd, int *fd6) |
925 | { |
926 | struct addrinfo hints, *res, *res0; |
927 | char hostname[NI_MAXHOST256], servname[NI_MAXSERV32]; |
928 | int *fdp, error, reuseaddr; |
929 | |
930 | *fd = *fd6 = -1; |
931 | if (proto == NULL((void *)0)) |
932 | proto = "udp"; |
933 | if (port == NULL((void *)0)) |
934 | port = strcmp(proto, "tls") == 0 ? "syslog-tls" : "syslog"; |
935 | |
936 | memset(&hints, 0, sizeof(hints)); |
937 | hints.ai_family = Family; |
938 | if (strcmp(proto, "udp") == 0) { |
939 | hints.ai_socktype = SOCK_DGRAM2; |
940 | hints.ai_protocol = IPPROTO_UDP17; |
941 | } else { |
942 | hints.ai_socktype = SOCK_STREAM1; |
943 | hints.ai_protocol = IPPROTO_TCP6; |
944 | } |
945 | hints.ai_flags = AI_PASSIVE1; |
946 | |
947 | if ((error = getaddrinfo(host, port, &hints, &res0))) { |
948 | log_warnx("getaddrinfo proto %s, host %s, port %s: %s", |
949 | proto, host ? host : "*", port, gai_strerror(error)); |
950 | return (-1); |
951 | } |
952 | |
953 | for (res = res0; res; res = res->ai_next) { |
954 | switch (res->ai_family) { |
955 | case AF_INET2: |
956 | fdp = fd; |
957 | break; |
958 | case AF_INET624: |
959 | fdp = fd6; |
960 | break; |
961 | default: |
962 | continue; |
963 | } |
964 | if (*fdp >= 0) |
965 | continue; |
966 | |
967 | if ((*fdp = socket(res->ai_family, |
968 | res->ai_socktype | SOCK_NONBLOCK0x4000, res->ai_protocol)) == -1) |
969 | continue; |
970 | |
971 | error = getnameinfo(res->ai_addr, res->ai_addrlen, hostname, |
972 | sizeof(hostname), servname, sizeof(servname), |
973 | NI_NUMERICHOST1 | NI_NUMERICSERV2 | |
974 | (res->ai_socktype == SOCK_DGRAM2 ? NI_DGRAM16 : 0)); |
975 | if (error) { |
976 | log_warnx("malformed bind address host \"%s\": %s", |
977 | host, gai_strerror(error)); |
978 | strlcpy(hostname, hostname_unknown, sizeof(hostname)); |
979 | strlcpy(servname, hostname_unknown, sizeof(servname)); |
980 | } |
981 | if (shutread && shutdown(*fdp, SHUT_RD0) == -1) { |
982 | log_warn("shutdown SHUT_RD " |
983 | "protocol %d, address %s, portnum %s", |
984 | res->ai_protocol, hostname, servname); |
985 | close(*fdp); |
986 | *fdp = -1; |
987 | continue; |
988 | } |
989 | if (!shutread && res->ai_protocol == IPPROTO_UDP17) |
990 | double_sockbuf(*fdp, SO_RCVBUF0x1002, 0); |
991 | else if (res->ai_protocol == IPPROTO_TCP6) { |
992 | set_sockbuf(*fdp); |
993 | set_keepalive(*fdp); |
994 | } |
995 | reuseaddr = 1; |
996 | if (setsockopt(*fdp, SOL_SOCKET0xffff, SO_REUSEADDR0x0004, &reuseaddr, |
997 | sizeof(reuseaddr)) == -1) { |
998 | log_warn("setsockopt SO_REUSEADDR " |
999 | "protocol %d, address %s, portnum %s", |
1000 | res->ai_protocol, hostname, servname); |
1001 | close(*fdp); |
1002 | *fdp = -1; |
1003 | continue; |
1004 | } |
1005 | if (bind(*fdp, res->ai_addr, res->ai_addrlen) == -1) { |
1006 | log_warn("bind protocol %d, address %s, portnum %s", |
1007 | res->ai_protocol, hostname, servname); |
1008 | close(*fdp); |
1009 | *fdp = -1; |
1010 | continue; |
1011 | } |
1012 | if (!shutread && res->ai_protocol == IPPROTO_TCP6 && |
1013 | listen(*fdp, 10) == -1) { |
1014 | log_warn("listen protocol %d, address %s, portnum %s", |
1015 | res->ai_protocol, hostname, servname); |
1016 | close(*fdp); |
1017 | *fdp = -1; |
1018 | continue; |
1019 | } |
1020 | } |
1021 | |
1022 | freeaddrinfo(res0); |
1023 | |
1024 | if (*fd == -1 && *fd6 == -1) |
1025 | return (-1); |
1026 | return (0); |
1027 | } |
1028 | |
1029 | void |
1030 | klog_readcb(int fd, short event, void *arg) |
1031 | { |
1032 | struct event *ev = arg; |
1033 | ssize_t n; |
1034 | |
1035 | n = read(fd, linebuf, linesize - 1); |
1036 | if (n > 0) { |
1037 | linebuf[n] = '\0'; |
1038 | printsys(linebuf); |
1039 | } else if (n == -1 && errno(*__errno()) != EINTR4) { |
1040 | log_warn("read klog"); |
1041 | event_del(ev); |
1042 | } |
1043 | } |
1044 | |
1045 | void |
1046 | udp_readcb(int fd, short event, void *arg) |
1047 | { |
1048 | struct sockaddr_storage sa; |
1049 | socklen_t salen; |
1050 | ssize_t n; |
1051 | |
1052 | salen = sizeof(sa); |
1053 | n = recvfrom(fd, linebuf, LOG_MAXLINE8192, 0, (struct sockaddr *)&sa, |
1054 | &salen); |
1055 | if (n > 0) { |
1056 | char resolve[NI_MAXHOST256]; |
1057 | |
1058 | linebuf[n] = '\0'; |
1059 | cvthname((struct sockaddr *)&sa, resolve, sizeof(resolve)); |
1060 | log_debug("cvthname res: %s", resolve); |
1061 | printline(resolve, linebuf); |
1062 | } else if (n == -1 && errno(*__errno()) != EINTR4 && errno(*__errno()) != EWOULDBLOCK35) |
1063 | log_warn("recvfrom udp"); |
1064 | } |
1065 | |
1066 | void |
1067 | unix_readcb(int fd, short event, void *arg) |
1068 | { |
1069 | struct sockaddr_un sa; |
1070 | socklen_t salen; |
1071 | ssize_t n; |
1072 | |
1073 | salen = sizeof(sa); |
1074 | n = recvfrom(fd, linebuf, LOG_MAXLINE8192, 0, (struct sockaddr *)&sa, |
1075 | &salen); |
1076 | if (n > 0) { |
1077 | linebuf[n] = '\0'; |
1078 | printline(LocalHostName, linebuf); |
1079 | } else if (n == -1 && errno(*__errno()) != EINTR4 && errno(*__errno()) != EWOULDBLOCK35) |
1080 | log_warn("recvfrom unix"); |
1081 | } |
1082 | |
1083 | int |
1084 | reserve_accept4(int lfd, int event, struct event *ev, |
1085 | void (*cb)(int, short, void *), |
1086 | struct sockaddr *sa, socklen_t *salen, int flags) |
1087 | { |
1088 | struct timeval to = { 1, 0 }; |
1089 | int afd; |
1090 | |
1091 | if (event & EV_TIMEOUT0x01) { |
1092 | log_debug("Listen again"); |
1093 | /* Enable the listen event, there is no timeout anymore. */ |
1094 | event_set(ev, lfd, EV_READ0x02|EV_PERSIST0x10, cb, ev); |
1095 | event_add(ev, NULL((void *)0)); |
1096 | errno(*__errno()) = EWOULDBLOCK35; |
1097 | return (-1); |
1098 | } |
1099 | |
1100 | if (getdtablecount() + FD_RESERVE5 >= getdtablesize()) { |
1101 | afd = -1; |
1102 | errno(*__errno()) = EMFILE24; |
1103 | } else |
1104 | afd = accept4(lfd, sa, salen, flags); |
1105 | |
1106 | if (afd == -1 && (errno(*__errno()) == ENFILE23 || errno(*__errno()) == EMFILE24)) { |
1107 | log_info(LOG_WARNING4, "accept deferred: %s", strerror(errno(*__errno()))); |
1108 | /* |
1109 | * Disable the listen event and convert it to a timeout. |
1110 | * Pass the listen file descriptor to the callback. |
1111 | */ |
1112 | event_del(ev); |
1113 | event_set(ev, lfd, 0, cb, ev); |
1114 | event_add(ev, &to); |
1115 | return (-1); |
1116 | } |
1117 | |
1118 | return (afd); |
1119 | } |
1120 | |
1121 | void |
1122 | tcp_acceptcb(int lfd, short event, void *arg) |
1123 | { |
1124 | acceptcb(lfd, event, arg, 0); |
1125 | } |
1126 | |
1127 | void |
1128 | tls_acceptcb(int lfd, short event, void *arg) |
1129 | { |
1130 | acceptcb(lfd, event, arg, 1); |
1131 | } |
1132 | |
1133 | void |
1134 | acceptcb(int lfd, short event, void *arg, int usetls) |
1135 | { |
1136 | struct event *ev = arg; |
1137 | struct peer *p; |
1138 | struct sockaddr_storage ss; |
1139 | socklen_t sslen; |
1140 | char hostname[NI_MAXHOST256], servname[NI_MAXSERV32]; |
1141 | char *peername; |
1142 | int fd, error; |
1143 | |
1144 | sslen = sizeof(ss); |
1145 | if ((fd = reserve_accept4(lfd, event, ev, tcp_acceptcb, |
1146 | (struct sockaddr *)&ss, &sslen, SOCK_NONBLOCK0x4000)) == -1) { |
1147 | if (errno(*__errno()) != ENFILE23 && errno(*__errno()) != EMFILE24 && |
1148 | errno(*__errno()) != EINTR4 && errno(*__errno()) != EWOULDBLOCK35 && |
1149 | errno(*__errno()) != ECONNABORTED53) |
1150 | log_warn("accept tcp socket"); |
1151 | return; |
1152 | } |
1153 | log_debug("Accepting tcp connection"); |
1154 | |
1155 | error = getnameinfo((struct sockaddr *)&ss, sslen, hostname, |
1156 | sizeof(hostname), servname, sizeof(servname), |
1157 | NI_NUMERICHOST1 | NI_NUMERICSERV2); |
1158 | if (error) { |
1159 | log_warnx("malformed TCP accept address: %s", |
1160 | gai_strerror(error)); |
1161 | peername = hostname_unknown; |
1162 | } else if (asprintf(&peername, ss.ss_family == AF_INET624 ? |
1163 | "[%s]:%s" : "%s:%s", hostname, servname) == -1) { |
1164 | log_warn("allocate hostname \"%s\"", hostname); |
1165 | peername = hostname_unknown; |
1166 | } |
1167 | log_debug("Peer address and port %s", peername); |
1168 | if ((p = malloc(sizeof(*p))) == NULL((void *)0)) { |
1169 | log_warn("allocate peername \"%s\"", peername); |
1170 | close(fd); |
1171 | return; |
1172 | } |
1173 | p->p_fd = fd; |
1174 | if ((p->p_bufev = bufferevent_new(fd, tcp_readcb, NULL((void *)0), tcp_closecb, |
1175 | p)) == NULL((void *)0)) { |
1176 | log_warn("bufferevent \"%s\"", peername); |
1177 | free(p); |
1178 | close(fd); |
1179 | return; |
1180 | } |
1181 | p->p_ctx = NULL((void *)0); |
1182 | if (usetls) { |
1183 | if (tls_accept_socket(server_ctx, &p->p_ctx, fd) == -1) { |
1184 | log_warnx("tls_accept_socket \"%s\": %s", |
1185 | peername, tls_error(server_ctx)); |
1186 | bufferevent_free(p->p_bufev); |
1187 | free(p); |
1188 | close(fd); |
1189 | return; |
1190 | } |
1191 | buffertls_set(&p->p_buftls, p->p_bufev, p->p_ctx, fd); |
1192 | buffertls_accept(&p->p_buftls, fd); |
1193 | log_debug("tcp accept callback: tls context success"); |
1194 | } |
1195 | if (!NoDNS && peername != hostname_unknown && |
1196 | priv_getnameinfo((struct sockaddr *)&ss, ss.ss_len, hostname, |
1197 | sizeof(hostname)) != 0) { |
1198 | log_debug("Host name for accept address (%s) unknown", |
1199 | hostname); |
1200 | } |
1201 | if (peername == hostname_unknown || |
1202 | (p->p_hostname = strdup(hostname)) == NULL((void *)0)) |
1203 | p->p_hostname = hostname_unknown; |
1204 | log_debug("Peer hostname %s", hostname); |
1205 | p->p_peername = peername; |
1206 | bufferevent_enable(p->p_bufev, EV_READ0x02); |
1207 | |
1208 | log_info(LOG_DEBUG7, "%s logger \"%s\" accepted", |
1209 | p->p_ctx ? "tls" : "tcp", peername); |
1210 | } |
1211 | |
1212 | /* |
1213 | * Syslog over TCP RFC 6587 3.4.1. Octet Counting |
1214 | */ |
1215 | int |
1216 | octet_counting(struct evbuffer *evbuf, char **msg, int drain) |
1217 | { |
1218 | char *p, *buf, *end; |
1219 | int len; |
1220 | |
1221 | buf = EVBUFFER_DATA(evbuf)(evbuf)->buffer; |
1222 | end = buf + EVBUFFER_LENGTH(evbuf)(evbuf)->off; |
1223 | /* |
1224 | * It can be assumed that octet-counting framing is used if a syslog |
1225 | * frame starts with a digit. |
1226 | */ |
1227 | if (buf >= end || !isdigit((unsigned char)*buf)) |
1228 | return (-1); |
1229 | /* |
1230 | * SYSLOG-FRAME = MSG-LEN SP SYSLOG-MSG |
1231 | * MSG-LEN is the octet count of the SYSLOG-MSG in the SYSLOG-FRAME. |
1232 | * We support up to 5 digits in MSG-LEN, so the maximum is 99999. |
1233 | */ |
1234 | for (p = buf; p < end && p < buf + 5; p++) { |
1235 | if (!isdigit((unsigned char)*p)) |
1236 | break; |
1237 | } |
1238 | if (buf >= p || p >= end || *p != ' ') |
1239 | return (-1); |
1240 | p++; |
1241 | /* Using atoi() is safe as buf starts with 1 to 5 digits and a space. */ |
1242 | len = atoi(buf); |
1243 | if (drain) |
1244 | log_debugadd(" octet counting %d", len); |
1245 | if (p + len > end) |
1246 | return (0); |
1247 | if (drain) |
1248 | evbuffer_drain(evbuf, p - buf); |
1249 | if (msg) |
1250 | *msg = p; |
1251 | return (len); |
1252 | } |
1253 | |
1254 | /* |
1255 | * Syslog over TCP RFC 6587 3.4.2. Non-Transparent-Framing |
1256 | */ |
1257 | int |
1258 | non_transparent_framing(struct evbuffer *evbuf, char **msg) |
1259 | { |
1260 | char *p, *buf, *end; |
1261 | |
1262 | buf = EVBUFFER_DATA(evbuf)(evbuf)->buffer; |
1263 | end = buf + EVBUFFER_LENGTH(evbuf)(evbuf)->off; |
1264 | /* |
1265 | * The TRAILER has usually been a single character and most often |
1266 | * is ASCII LF (%d10). However, other characters have also been |
1267 | * seen, with ASCII NUL (%d00) being a prominent example. |
1268 | */ |
1269 | for (p = buf; p < end; p++) { |
1270 | if (*p == '\0' || *p == '\n') |
1271 | break; |
1272 | } |
1273 | if (p + 1 - buf >= INT_MAX0x7fffffff) |
1274 | return (-1); |
1275 | log_debugadd(" non transparent framing"); |
1276 | if (p >= end) |
1277 | return (0); |
1278 | /* |
1279 | * Some devices have also been seen to emit a two-character |
1280 | * TRAILER, which is usually CR and LF. |
1281 | */ |
1282 | if (buf < p && p[0] == '\n' && p[-1] == '\r') |
1283 | p[-1] = '\0'; |
1284 | if (msg) |
1285 | *msg = buf; |
1286 | return (p + 1 - buf); |
1287 | } |
1288 | |
1289 | void |
1290 | tcp_readcb(struct bufferevent *bufev, void *arg) |
1291 | { |
1292 | struct peer *p = arg; |
1293 | char *msg; |
1294 | int len; |
1295 | |
1296 | while (EVBUFFER_LENGTH(bufev->input)(bufev->input)->off > 0) { |
1297 | log_debugadd("%s logger \"%s\"", p->p_ctx ? "tls" : "tcp", |
1298 | p->p_peername); |
1299 | msg = NULL((void *)0); |
1300 | len = octet_counting(bufev->input, &msg, 1); |
1301 | if (len < 0) |
1302 | len = non_transparent_framing(bufev->input, &msg); |
1303 | if (len < 0) |
1304 | log_debugadd("unknown method"); |
1305 | if (msg == NULL((void *)0)) { |
1306 | log_debugadd(", incomplete frame"); |
1307 | break; |
1308 | } |
1309 | log_debug(", use %d bytes", len); |
1310 | if (len > 0 && msg[len-1] == '\n') |
1311 | msg[len-1] = '\0'; |
1312 | if (len == 0 || msg[len-1] != '\0') { |
1313 | memcpy(linebuf, msg, MINIMUM(len, LOG_MAXLINE)(((len) < (8192)) ? (len) : (8192))); |
1314 | linebuf[MINIMUM(len, LOG_MAXLINE)(((len) < (8192)) ? (len) : (8192))] = '\0'; |
1315 | msg = linebuf; |
1316 | } |
1317 | printline(p->p_hostname, msg); |
1318 | evbuffer_drain(bufev->input, len); |
1319 | } |
1320 | /* Maximum frame has 5 digits, 1 space, MAXLINE chars, 1 new line. */ |
1321 | if (EVBUFFER_LENGTH(bufev->input)(bufev->input)->off >= 5 + 1 + LOG_MAXLINE8192 + 1) { |
1322 | log_debug(", use %zu bytes", EVBUFFER_LENGTH(bufev->input)(bufev->input)->off); |
1323 | EVBUFFER_DATA(bufev->input)(bufev->input)->buffer[5 + 1 + LOG_MAXLINE8192] = '\0'; |
1324 | printline(p->p_hostname, EVBUFFER_DATA(bufev->input)(bufev->input)->buffer); |
1325 | evbuffer_drain(bufev->input, -1); |
1326 | } else if (EVBUFFER_LENGTH(bufev->input)(bufev->input)->off > 0) |
1327 | log_debug(", buffer %zu bytes", EVBUFFER_LENGTH(bufev->input)(bufev->input)->off); |
1328 | } |
1329 | |
1330 | void |
1331 | tcp_closecb(struct bufferevent *bufev, short event, void *arg) |
1332 | { |
1333 | struct peer *p = arg; |
1334 | |
1335 | if (event & EVBUFFER_EOF0x10) { |
1336 | log_info(LOG_DEBUG7, "%s logger \"%s\" connection close", |
1337 | p->p_ctx ? "tls" : "tcp", p->p_peername); |
1338 | } else { |
1339 | log_info(LOG_NOTICE5, "%s logger \"%s\" connection error: %s", |
1340 | p->p_ctx ? "tls" : "tcp", p->p_peername, |
1341 | p->p_ctx ? tls_error(p->p_ctx) : strerror(errno(*__errno()))); |
1342 | } |
1343 | |
1344 | if (p->p_peername != hostname_unknown) |
1345 | free(p->p_peername); |
1346 | if (p->p_hostname != hostname_unknown) |
1347 | free(p->p_hostname); |
1348 | bufferevent_free(p->p_bufev); |
1349 | close(p->p_fd); |
1350 | free(p); |
1351 | } |
1352 | |
1353 | int |
1354 | tcp_socket(struct filed *f) |
1355 | { |
1356 | int s; |
1357 | |
1358 | if ((s = socket(f->f_un.f_forw.f_addr.ss_family, |
1359 | SOCK_STREAM1 | SOCK_NONBLOCK0x4000, IPPROTO_TCP6)) == -1) { |
1360 | log_warn("socket \"%s\"", f->f_un.f_forw.f_loghost); |
1361 | return (-1); |
1362 | } |
1363 | set_sockbuf(s); |
1364 | if (connect(s, (struct sockaddr *)&f->f_un.f_forw.f_addr, |
1365 | f->f_un.f_forw.f_addr.ss_len) == -1 && errno(*__errno()) != EINPROGRESS36) { |
1366 | log_warn("connect \"%s\"", f->f_un.f_forw.f_loghost); |
1367 | close(s); |
1368 | return (-1); |
1369 | } |
1370 | return (s); |
1371 | } |
1372 | |
1373 | void |
1374 | tcp_dropcb(struct bufferevent *bufev, void *arg) |
1375 | { |
1376 | struct filed *f = arg; |
1377 | |
1378 | /* |
1379 | * Drop data received from the forward log server. |
1380 | */ |
1381 | log_debug("loghost \"%s\" did send %zu bytes back", |
1382 | f->f_un.f_forw.f_loghost, EVBUFFER_LENGTH(bufev->input)(bufev->input)->off); |
1383 | evbuffer_drain(bufev->input, -1); |
1384 | } |
1385 | |
1386 | void |
1387 | tcp_writecb(struct bufferevent *bufev, void *arg) |
1388 | { |
1389 | struct filed *f = arg; |
1390 | char ebuf[ERRBUFSIZE256]; |
1391 | |
1392 | /* |
1393 | * Successful write, connection to server is good, reset wait time. |
1394 | */ |
1395 | log_debug("loghost \"%s\" successful write", f->f_un.f_forw.f_loghost); |
1396 | f->f_un.f_forw.f_retrywait = 0; |
1397 | |
1398 | if (f->f_dropped > 0 && |
1399 | EVBUFFER_LENGTH(f->f_un.f_forw.f_bufev->output)(f->f_un.f_forw.f_bufev->output)->off < MAX_TCPBUF(256 * 1024)) { |
1400 | snprintf(ebuf, sizeof(ebuf), "to loghost \"%s\"", |
1401 | f->f_un.f_forw.f_loghost); |
1402 | dropped_warn(&f->f_dropped, ebuf); |
1403 | } |
1404 | } |
1405 | |
1406 | void |
1407 | tcp_errorcb(struct bufferevent *bufev, short event, void *arg) |
1408 | { |
1409 | struct filed *f = arg; |
1410 | char *p, *buf, *end; |
1411 | int l; |
1412 | char ebuf[ERRBUFSIZE256]; |
1413 | |
1414 | if (event & EVBUFFER_EOF0x10) |
1415 | snprintf(ebuf, sizeof(ebuf), "loghost \"%s\" connection close", |
1416 | f->f_un.f_forw.f_loghost); |
1417 | else |
1418 | snprintf(ebuf, sizeof(ebuf), |
1419 | "loghost \"%s\" connection error: %s", |
1420 | f->f_un.f_forw.f_loghost, f->f_un.f_forw.f_ctx ? |
1421 | tls_error(f->f_un.f_forw.f_ctx) : strerror(errno(*__errno()))); |
1422 | log_debug("%s", ebuf); |
1423 | |
1424 | /* The SIGHUP handler may also close the socket, so invalidate it. */ |
1425 | if (f->f_un.f_forw.f_ctx) { |
1426 | tls_close(f->f_un.f_forw.f_ctx); |
1427 | tls_free(f->f_un.f_forw.f_ctx); |
1428 | f->f_un.f_forw.f_ctx = NULL((void *)0); |
1429 | } |
1430 | bufferevent_disable(bufev, EV_READ0x02|EV_WRITE0x04); |
1431 | close(f->f_file); |
1432 | f->f_file = -1; |
1433 | |
1434 | /* |
1435 | * The messages in the output buffer may be out of sync. |
1436 | * Check that the buffer starts with "1234 <1234 octets>\n". |
1437 | * Otherwise remove the partial message from the beginning. |
1438 | */ |
1439 | buf = EVBUFFER_DATA(bufev->output)(bufev->output)->buffer; |
1440 | end = buf + EVBUFFER_LENGTH(bufev->output)(bufev->output)->off; |
1441 | if (buf < end && !((l = octet_counting(bufev->output, &p, 0)) > 0 && |
1442 | p[l-1] == '\n')) { |
1443 | for (p = buf; p < end; p++) { |
1444 | if (*p == '\n') { |
1445 | evbuffer_drain(bufev->output, p - buf + 1); |
1446 | break; |
1447 | } |
1448 | } |
1449 | /* Without '\n' discard everything. */ |
1450 | if (p == end) |
1451 | evbuffer_drain(bufev->output, -1); |
1452 | log_debug("loghost \"%s\" dropped partial message", |
1453 | f->f_un.f_forw.f_loghost); |
1454 | f->f_dropped++; |
1455 | } |
1456 | |
1457 | loghost_retry(f); |
1458 | |
1459 | /* Log the connection error to the fresh buffer after reconnecting. */ |
1460 | log_info(LOG_WARNING4, "%s", ebuf); |
1461 | } |
1462 | |
1463 | void |
1464 | tcp_connectcb(int fd, short event, void *arg) |
1465 | { |
1466 | struct filed *f = arg; |
1467 | struct bufferevent *bufev = f->f_un.f_forw.f_bufev; |
1468 | int s; |
1469 | |
1470 | if (f->f_un.f_forw.f_addr.ss_family == AF_UNSPEC0) { |
1471 | if (loghost_resolve(f) != 0) { |
1472 | loghost_retry(f); |
1473 | return; |
1474 | } |
1475 | } |
1476 | |
1477 | if ((s = tcp_socket(f)) == -1) { |
1478 | loghost_retry(f); |
1479 | return; |
1480 | } |
1481 | log_debug("tcp connect callback: socket success, event %#x", event); |
1482 | f->f_file = s; |
1483 | |
1484 | bufferevent_setfd(bufev, s); |
1485 | bufferevent_setcb(bufev, tcp_dropcb, tcp_writecb, tcp_errorcb, f); |
1486 | /* |
1487 | * Although syslog is a write only protocol, enable reading from |
1488 | * the socket to detect connection close and errors. |
1489 | */ |
1490 | bufferevent_enable(bufev, EV_READ0x02|EV_WRITE0x04); |
1491 | |
1492 | if (f->f_type == F_FORWTLS10) { |
1493 | if ((f->f_un.f_forw.f_ctx = tls_client()) == NULL((void *)0)) { |
1494 | log_warn("tls_client \"%s\"", f->f_un.f_forw.f_loghost); |
1495 | goto error; |
1496 | } |
1497 | if (client_config && |
1498 | tls_configure(f->f_un.f_forw.f_ctx, client_config) == -1) { |
1499 | log_warnx("tls_configure \"%s\": %s", |
1500 | f->f_un.f_forw.f_loghost, |
1501 | tls_error(f->f_un.f_forw.f_ctx)); |
1502 | goto error; |
1503 | } |
1504 | if (tls_connect_socket(f->f_un.f_forw.f_ctx, s, |
1505 | f->f_un.f_forw.f_host) == -1) { |
1506 | log_warnx("tls_connect_socket \"%s\": %s", |
1507 | f->f_un.f_forw.f_loghost, |
1508 | tls_error(f->f_un.f_forw.f_ctx)); |
1509 | goto error; |
1510 | } |
1511 | log_debug("tcp connect callback: tls context success"); |
1512 | |
1513 | buffertls_set(&f->f_un.f_forw.f_buftls, bufev, |
1514 | f->f_un.f_forw.f_ctx, s); |
1515 | buffertls_connect(&f->f_un.f_forw.f_buftls, s); |
1516 | } |
1517 | |
1518 | return; |
1519 | |
1520 | error: |
1521 | if (f->f_un.f_forw.f_ctx) { |
1522 | tls_free(f->f_un.f_forw.f_ctx); |
1523 | f->f_un.f_forw.f_ctx = NULL((void *)0); |
1524 | } |
1525 | bufferevent_disable(bufev, EV_READ0x02|EV_WRITE0x04); |
1526 | close(f->f_file); |
1527 | f->f_file = -1; |
1528 | loghost_retry(f); |
1529 | } |
1530 | |
1531 | int |
1532 | loghost_resolve(struct filed *f) |
1533 | { |
1534 | char hostname[NI_MAXHOST256]; |
1535 | int error; |
1536 | |
1537 | error = priv_getaddrinfo(f->f_un.f_forw.f_ipproto, |
1538 | f->f_un.f_forw.f_host, f->f_un.f_forw.f_port, |
1539 | (struct sockaddr *)&f->f_un.f_forw.f_addr, |
1540 | sizeof(f->f_un.f_forw.f_addr)); |
1541 | if (error) { |
1542 | log_warnx("bad hostname \"%s\"", f->f_un.f_forw.f_loghost); |
1543 | f->f_un.f_forw.f_addr.ss_family = AF_UNSPEC0; |
1544 | return (error); |
1545 | } |
1546 | |
1547 | error = getnameinfo((struct sockaddr *)&f->f_un.f_forw.f_addr, |
1548 | f->f_un.f_forw.f_addr.ss_len, hostname, sizeof(hostname), NULL((void *)0), 0, |
1549 | NI_NUMERICHOST1 | NI_NUMERICSERV2 | |
1550 | (strncmp(f->f_un.f_forw.f_ipproto, "udp", 3) == 0 ? NI_DGRAM16 : 0)); |
1551 | if (error) { |
1552 | log_warnx("malformed UDP address loghost \"%s\": %s", |
1553 | f->f_un.f_forw.f_loghost, gai_strerror(error)); |
1554 | strlcpy(hostname, hostname_unknown, sizeof(hostname)); |
1555 | } |
1556 | |
1557 | log_debug("resolved loghost \"%s\" address %s", |
1558 | f->f_un.f_forw.f_loghost, hostname); |
1559 | return (0); |
1560 | } |
1561 | |
1562 | void |
1563 | loghost_retry(struct filed *f) |
1564 | { |
1565 | struct timeval to; |
1566 | |
1567 | if (f->f_un.f_forw.f_retrywait == 0) |
1568 | f->f_un.f_forw.f_retrywait = 1; |
1569 | else |
1570 | f->f_un.f_forw.f_retrywait <<= 1; |
1571 | if (f->f_un.f_forw.f_retrywait > 600) |
1572 | f->f_un.f_forw.f_retrywait = 600; |
1573 | to.tv_sec = f->f_un.f_forw.f_retrywait; |
1574 | to.tv_usec = 0; |
1575 | evtimer_add(&f->f_un.f_forw.f_ev, &to)event_add(&f->f_un.f_forw.f_ev, &to); |
1576 | |
1577 | log_debug("retry loghost \"%s\" wait %d", |
1578 | f->f_un.f_forw.f_loghost, f->f_un.f_forw.f_retrywait); |
1579 | } |
1580 | |
1581 | void |
1582 | udp_resolvecb(int fd, short event, void *arg) |
1583 | { |
1584 | struct filed *f = arg; |
1585 | struct timeval to; |
1586 | |
1587 | if (loghost_resolve(f) != 0) { |
1588 | loghost_retry(f); |
1589 | return; |
1590 | } |
1591 | |
1592 | switch (f->f_un.f_forw.f_addr.ss_family) { |
1593 | case AF_INET2: |
1594 | f->f_file = fd_udp; |
1595 | break; |
1596 | case AF_INET624: |
1597 | f->f_file = fd_udp6; |
1598 | break; |
1599 | } |
1600 | f->f_un.f_forw.f_retrywait = 0; |
1601 | |
1602 | if (f->f_dropped > 0) { |
1603 | char ebuf[ERRBUFSIZE256]; |
1604 | |
1605 | snprintf(ebuf, sizeof(ebuf), "to udp loghost \"%s\"", |
1606 | f->f_un.f_forw.f_loghost); |
1607 | dropped_warn(&f->f_dropped, ebuf); |
1608 | } |
1609 | } |
1610 | |
1611 | int |
1612 | tcpbuf_countmsg(struct bufferevent *bufev) |
1613 | { |
1614 | char *p, *buf, *end; |
1615 | int i = 0; |
1616 | |
1617 | buf = EVBUFFER_DATA(bufev->output)(bufev->output)->buffer; |
1618 | end = buf + EVBUFFER_LENGTH(bufev->output)(bufev->output)->off; |
1619 | for (p = buf; p < end; p++) { |
1620 | if (*p == '\n') |
1621 | i++; |
1622 | } |
1623 | return (i); |
1624 | } |
1625 | |
1626 | void |
1627 | usage(void) |
1628 | { |
1629 | |
1630 | (void)fprintf(stderr(&__sF[2]), |
1631 | "usage: syslogd [-46dFhnruVZ] [-a path] [-C CAfile]\n" |
1632 | "\t[-c cert_file] [-f config_file] [-K CAfile] [-k key_file]\n" |
1633 | "\t[-m mark_interval] [-p log_socket] [-S listen_address]\n" |
1634 | "\t[-s reporting_socket] [-T listen_address] [-U bind_address]\n"); |
1635 | exit(1); |
1636 | } |
1637 | |
1638 | /* |
1639 | * Take a raw input line, decode the message, and print the message |
1640 | * on the appropriate log files. |
1641 | */ |
1642 | void |
1643 | printline(char *hname, char *msgstr) |
1644 | { |
1645 | struct msg msg; |
1646 | char *p, *q, line[LOG_MAXLINE8192 + 4 + 1]; /* message, encoding, NUL */ |
1647 | |
1648 | p = msgstr; |
1649 | for (q = line; *p && q < &line[LOG_MAXLINE8192]; p++) { |
1650 | if (*p == '\n') |
1651 | *q++ = ' '; |
1652 | else |
1653 | q = vis(q, *p, VIS_NOSLASH0x40, 0); |
1654 | } |
1655 | line[LOG_MAXLINE8192] = *q = '\0'; |
1656 | |
1657 | parsemsg(line, &msg); |
1658 | if (msg.m_pri == -1) |
1659 | msg.m_pri = DEFUPRI((1<<3)|5); |
1660 | /* |
1661 | * Don't allow users to log kernel messages. |
1662 | * NOTE: since LOG_KERN == 0 this will also match |
1663 | * messages with no facility specified. |
1664 | */ |
1665 | if (LOG_FAC(msg.m_pri)(((msg.m_pri) & 0x03f8) >> 3) == LOG_KERN(0<<3)) |
1666 | msg.m_pri = LOG_USER(1<<3) | LOG_PRI(msg.m_pri)((msg.m_pri) & 0x07); |
1667 | |
1668 | if (msg.m_timestamp[0] == '\0') |
1669 | current_time(msg.m_timestamp); |
1670 | |
1671 | logmsg(&msg, 0, hname); |
1672 | } |
1673 | |
1674 | /* |
1675 | * Take a raw input line from /dev/klog, split and format similar to syslog(). |
1676 | */ |
1677 | void |
1678 | printsys(char *msgstr) |
1679 | { |
1680 | struct msg msg; |
1681 | int c, flags; |
1682 | char *lp, *p, *q; |
1683 | size_t prilen; |
1684 | int l; |
1685 | |
1686 | current_time(msg.m_timestamp); |
1687 | strlcpy(msg.m_prog, _PATH_UNIX"/bsd", sizeof(msg.m_prog)); |
1688 | l = snprintf(msg.m_msg, sizeof(msg.m_msg), "%s: ", _PATH_UNIX"/bsd"); |
1689 | if (l < 0 || l >= sizeof(msg.m_msg)) { |
1690 | msg.m_msg[0] = '\0'; |
1691 | l = 0; |
1692 | } |
1693 | lp = msg.m_msg + l; |
1694 | for (p = msgstr; *p != '\0'; ) { |
1695 | flags = SYNC_FILE0x002; /* fsync file after write */ |
1696 | msg.m_pri = DEFSPRI((0<<3)|2); |
1697 | prilen = parsemsg_priority(p, &msg.m_pri); |
1698 | p += prilen; |
1699 | if (prilen == 0) { |
1700 | /* kernel printf's come out on console */ |
1701 | flags |= IGN_CONS0x001; |
1702 | } |
1703 | if (msg.m_pri &~ (LOG_FACMASK0x03f8|LOG_PRIMASK0x07)) |
1704 | msg.m_pri = DEFSPRI((0<<3)|2); |
1705 | |
1706 | q = lp; |
1707 | while (*p && (c = *p++) != '\n' && |
1708 | q < &msg.m_msg[sizeof(msg.m_msg) - 4]) |
1709 | q = vis(q, c, VIS_NOSLASH0x40, 0); |
1710 | |
1711 | logmsg(&msg, flags, LocalHostName); |
1712 | } |
1713 | } |
1714 | |
1715 | void |
1716 | vlogmsg(int pri, const char *prog, const char *fmt, va_list ap) |
1717 | { |
1718 | struct msg msg; |
1719 | int l; |
1720 | |
1721 | msg.m_pri = pri; |
1722 | current_time(msg.m_timestamp); |
1723 | strlcpy(msg.m_prog, prog, sizeof(msg.m_prog)); |
1724 | l = snprintf(msg.m_msg, sizeof(msg.m_msg), "%s[%d]: ", prog, getpid()); |
1725 | if (l < 0 || l >= sizeof(msg.m_msg)) |
1726 | l = 0; |
1727 | l = vsnprintf(msg.m_msg + l, sizeof(msg.m_msg) - l, fmt, ap); |
1728 | if (l < 0) |
1729 | strlcpy(msg.m_msg, fmt, sizeof(msg.m_msg)); |
1730 | |
1731 | if (!Started) { |
1732 | fprintf(stderr(&__sF[2]), "%s\n", msg.m_msg); |
1733 | init_dropped++; |
1734 | return; |
1735 | } |
1736 | logmsg(&msg, 0, LocalHostName); |
1737 | } |
1738 | |
1739 | struct timeval now; |
1740 | |
1741 | void |
1742 | current_time(char *timestamp) |
1743 | { |
1744 | (void)gettimeofday(&now, NULL((void *)0)); |
1745 | |
1746 | if (ZuluTime) { |
1747 | struct tm *tm; |
1748 | size_t l; |
1749 | |
1750 | tm = gmtime(&now.tv_sec); |
1751 | l = strftime(timestamp, 33, "%FT%T", tm); |
1752 | /* |
1753 | * Use only millisecond precision as some time has |
1754 | * passed since syslog(3) was called. |
1755 | */ |
1756 | snprintf(timestamp + l, 33 - l, ".%03ldZ", now.tv_usec / 1000); |
1757 | } else |
1758 | strlcpy(timestamp, ctime(&now.tv_sec) + 4, 16); |
1759 | } |
1760 | |
1761 | /* |
1762 | * Log a message to the appropriate log files, users, etc. based on |
1763 | * the priority. |
1764 | */ |
1765 | void |
1766 | logmsg(struct msg *msg, int flags, char *from) |
1767 | { |
1768 | struct filed *f; |
1769 | int fac, msglen, prilev; |
1770 | |
1771 | (void)gettimeofday(&now, NULL((void *)0)); |
1772 | log_debug("logmsg: pri 0%o, flags 0x%x, from %s, prog %s, msg %s", |
1773 | msg->m_pri, flags, from, msg->m_prog, msg->m_msg); |
1774 | |
1775 | /* extract facility and priority level */ |
1776 | if (flags & MARK0x008) |
1777 | fac = LOG_NFACILITIES24; |
1778 | else |
1779 | fac = LOG_FAC(msg->m_pri)(((msg->m_pri) & 0x03f8) >> 3); |
1780 | prilev = LOG_PRI(msg->m_pri)((msg->m_pri) & 0x07); |
1781 | |
1782 | /* log the message to the particular outputs */ |
1783 | if (!Initialized) { |
1784 | f = &consfile; |
1785 | if (f->f_type == F_CONSOLE3) { |
1786 | strlcpy(f->f_lasttime, msg->m_timestamp, |
1787 | sizeof(f->f_lasttime)); |
1788 | strlcpy(f->f_prevhost, from, |
1789 | sizeof(f->f_prevhost)); |
1790 | fprintlog(f, flags, msg->m_msg); |
1791 | /* May be set to F_UNUSED, try again next time. */ |
1792 | f->f_type = F_CONSOLE3; |
1793 | } |
1794 | init_dropped++; |
1795 | return; |
1796 | } |
1797 | /* log the message to the particular outputs */ |
1798 | msglen = strlen(msg->m_msg); |
1799 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void *)0); ( f) = ((f)->f_next.sqe_next)) { |
1800 | /* skip messages that are incorrect priority */ |
1801 | if (f->f_pmask[fac] < prilev || |
1802 | f->f_pmask[fac] == INTERNAL_NOPRI0x10) |
1803 | continue; |
1804 | |
1805 | /* skip messages with the incorrect program or hostname */ |
1806 | if (f->f_program && fnmatch(f->f_program, msg->m_prog, 0) != 0) |
1807 | continue; |
1808 | if (f->f_hostname && fnmatch(f->f_hostname, from, 0) != 0) |
1809 | continue; |
1810 | |
1811 | if (f->f_type == F_CONSOLE3 && (flags & IGN_CONS0x001)) |
1812 | continue; |
1813 | |
1814 | /* don't output marks to recently written files */ |
1815 | if ((flags & MARK0x008) && |
1816 | (now.tv_sec - f->f_time) < MarkInterval / 2) |
1817 | continue; |
1818 | |
1819 | /* |
1820 | * suppress duplicate lines to this file |
1821 | */ |
1822 | if ((Repeat == 0 || (Repeat == 1 && |
1823 | (f->f_type != F_PIPE8 && f->f_type != F_FORWUDP4 && |
1824 | f->f_type != F_FORWTCP9 && f->f_type != F_FORWTLS10))) && |
1825 | (flags & MARK0x008) == 0 && msglen == f->f_prevlen && |
1826 | f->f_dropped == 0 && |
1827 | !strcmp(msg->m_msg, f->f_prevline) && |
1828 | !strcmp(from, f->f_prevhost)) { |
1829 | strlcpy(f->f_lasttime, msg->m_timestamp, |
1830 | sizeof(f->f_lasttime)); |
1831 | f->f_prevcount++; |
1832 | log_debug("msg repeated %d times, %ld sec of %d", |
1833 | f->f_prevcount, (long)(now.tv_sec - f->f_time), |
1834 | repeatinterval[f->f_repeatcount]); |
1835 | /* |
1836 | * If domark would have logged this by now, |
1837 | * flush it now (so we don't hold isolated messages), |
1838 | * but back off so we'll flush less often |
1839 | * in the future. |
1840 | */ |
1841 | if (now.tv_sec > REPEATTIME(f)((f)->f_time + repeatinterval[(f)->f_repeatcount])) { |
1842 | fprintlog(f, flags, (char *)NULL((void *)0)); |
1843 | BACKOFF(f){ if (++(f)->f_repeatcount > ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)) (f)->f_repeatcount = ((sizeof (repeatinterval) / sizeof(repeatinterval[0])) - 1); }; |
1844 | } |
1845 | } else { |
1846 | /* new line, save it */ |
1847 | if (f->f_prevcount) |
1848 | fprintlog(f, 0, (char *)NULL((void *)0)); |
1849 | f->f_repeatcount = 0; |
1850 | f->f_prevpri = msg->m_pri; |
1851 | strlcpy(f->f_lasttime, msg->m_timestamp, |
1852 | sizeof(f->f_lasttime)); |
1853 | strlcpy(f->f_prevhost, from, |
1854 | sizeof(f->f_prevhost)); |
1855 | if (msglen < MAXSVLINE120) { |
1856 | f->f_prevlen = msglen; |
1857 | strlcpy(f->f_prevline, msg->m_msg, |
1858 | sizeof(f->f_prevline)); |
1859 | fprintlog(f, flags, (char *)NULL((void *)0)); |
1860 | } else { |
1861 | f->f_prevline[0] = 0; |
1862 | f->f_prevlen = 0; |
1863 | fprintlog(f, flags, msg->m_msg); |
1864 | } |
1865 | } |
1866 | |
1867 | if (f->f_quick) |
1868 | break; |
1869 | } |
1870 | } |
1871 | |
1872 | void |
1873 | fprintlog(struct filed *f, int flags, char *msg) |
1874 | { |
1875 | struct iovec iov[IOVCNT7], *v; |
1876 | struct msghdr msghdr; |
1877 | int l, retryonce; |
1878 | char line[LOG_MAXLINE8192 + 1], pribuf[13], greetings[500], repbuf[80]; |
1879 | char ebuf[ERRBUFSIZE256]; |
1880 | |
1881 | v = iov; |
1882 | switch (f->f_type) { |
1883 | case F_FORWUDP4: |
1884 | case F_FORWTCP9: |
1885 | case F_FORWTLS10: |
1886 | l = snprintf(pribuf, sizeof(pribuf), "<%d>", f->f_prevpri); |
1887 | if (l < 0) |
1888 | l = strlcpy(pribuf, "<13>", sizeof(pribuf)); |
1889 | if (l >= sizeof(pribuf)) |
1890 | l = sizeof(pribuf) - 1; |
1891 | v->iov_base = pribuf; |
1892 | v->iov_len = l; |
1893 | break; |
1894 | case F_WALL6: |
1895 | l = snprintf(greetings, sizeof(greetings), |
1896 | "\r\n\7Message from syslogd@%s at %.24s ...\r\n", |
1897 | f->f_prevhost, ctime(&now.tv_sec)); |
1898 | if (l < 0) |
1899 | l = strlcpy(greetings, |
1900 | "\r\n\7Message from syslogd ...\r\n", |
1901 | sizeof(greetings)); |
1902 | if (l >= sizeof(greetings)) |
1903 | l = sizeof(greetings) - 1; |
1904 | v->iov_base = greetings; |
1905 | v->iov_len = l; |
1906 | break; |
1907 | default: |
1908 | v->iov_base = ""; |
1909 | v->iov_len = 0; |
1910 | break; |
1911 | } |
1912 | v++; |
1913 | |
1914 | if (f->f_lasttime[0] != '\0') { |
1915 | v->iov_base = f->f_lasttime; |
1916 | v->iov_len = strlen(f->f_lasttime); |
1917 | v++; |
1918 | v->iov_base = " "; |
1919 | v->iov_len = 1; |
1920 | } else { |
1921 | v->iov_base = ""; |
1922 | v->iov_len = 0; |
1923 | v++; |
1924 | v->iov_base = ""; |
1925 | v->iov_len = 0; |
1926 | } |
1927 | v++; |
1928 | |
1929 | switch (f->f_type) { |
1930 | case F_FORWUDP4: |
1931 | case F_FORWTCP9: |
1932 | case F_FORWTLS10: |
1933 | if (IncludeHostname) { |
1934 | v->iov_base = LocalHostName; |
1935 | v->iov_len = strlen(LocalHostName); |
1936 | v++; |
1937 | v->iov_base = " "; |
1938 | v->iov_len = 1; |
1939 | } else { |
1940 | /* XXX RFC requires to include host name */ |
1941 | v->iov_base = ""; |
1942 | v->iov_len = 0; |
1943 | v++; |
1944 | v->iov_base = ""; |
1945 | v->iov_len = 0; |
1946 | } |
1947 | break; |
1948 | default: |
1949 | if (f->f_prevhost[0] != '\0') { |
1950 | v->iov_base = f->f_prevhost; |
1951 | v->iov_len = strlen(v->iov_base); |
1952 | v++; |
1953 | v->iov_base = " "; |
1954 | v->iov_len = 1; |
1955 | } else { |
1956 | v->iov_base = ""; |
1957 | v->iov_len = 0; |
1958 | v++; |
1959 | v->iov_base = ""; |
1960 | v->iov_len = 0; |
1961 | } |
1962 | break; |
1963 | } |
1964 | v++; |
1965 | |
1966 | if (msg) { |
1967 | v->iov_base = msg; |
1968 | v->iov_len = strlen(msg); |
1969 | } else if (f->f_prevcount > 1) { |
1970 | l = snprintf(repbuf, sizeof(repbuf), |
1971 | "last message repeated %d times", f->f_prevcount); |
1972 | if (l < 0) |
1973 | l = strlcpy(repbuf, "last message repeated", |
1974 | sizeof(repbuf)); |
1975 | if (l >= sizeof(repbuf)) |
1976 | l = sizeof(repbuf) - 1; |
1977 | v->iov_base = repbuf; |
1978 | v->iov_len = l; |
1979 | } else { |
1980 | v->iov_base = f->f_prevline; |
1981 | v->iov_len = f->f_prevlen; |
1982 | } |
1983 | v++; |
1984 | |
1985 | switch (f->f_type) { |
1986 | case F_CONSOLE3: |
1987 | case F_TTY2: |
1988 | case F_USERS5: |
1989 | case F_WALL6: |
1990 | v->iov_base = "\r\n"; |
1991 | v->iov_len = 2; |
1992 | break; |
1993 | case F_FILE1: |
1994 | case F_PIPE8: |
1995 | case F_FORWTCP9: |
1996 | case F_FORWTLS10: |
1997 | v->iov_base = "\n"; |
1998 | v->iov_len = 1; |
1999 | break; |
2000 | default: |
2001 | v->iov_base = ""; |
2002 | v->iov_len = 0; |
2003 | break; |
2004 | } |
2005 | v = NULL((void *)0); |
2006 | |
2007 | log_debugadd("Logging to %s", TypeNames[f->f_type]); |
2008 | f->f_time = now.tv_sec; |
2009 | |
2010 | switch (f->f_type) { |
2011 | case F_UNUSED0: |
2012 | log_debug(""); |
2013 | break; |
2014 | |
2015 | case F_FORWUDP4: |
2016 | log_debugadd(" %s", f->f_un.f_forw.f_loghost); |
2017 | if (f->f_un.f_forw.f_addr.ss_family == AF_UNSPEC0) { |
2018 | log_debug(" (dropped not resolved)"); |
2019 | f->f_dropped++; |
2020 | break; |
2021 | } |
2022 | l = iov[0].iov_len + iov[1].iov_len + iov[2].iov_len + |
2023 | iov[3].iov_len + iov[4].iov_len + iov[5].iov_len + |
2024 | iov[6].iov_len; |
2025 | if (l > MAX_UDPMSG1180) { |
2026 | l -= MAX_UDPMSG1180; |
2027 | if (iov[5].iov_len > l) |
2028 | iov[5].iov_len -= l; |
2029 | else |
2030 | iov[5].iov_len = 0; |
2031 | } |
2032 | memset(&msghdr, 0, sizeof(msghdr)); |
2033 | msghdr.msg_name = &f->f_un.f_forw.f_addr; |
2034 | msghdr.msg_namelen = f->f_un.f_forw.f_addr.ss_len; |
2035 | msghdr.msg_iov = iov; |
2036 | msghdr.msg_iovlen = IOVCNT7; |
2037 | if (sendmsg(f->f_file, &msghdr, 0) == -1) { |
2038 | switch (errno(*__errno())) { |
2039 | case EACCES13: |
2040 | case EADDRNOTAVAIL49: |
2041 | case EHOSTDOWN64: |
2042 | case EHOSTUNREACH65: |
2043 | case ENETDOWN50: |
2044 | case ENETUNREACH51: |
2045 | case ENOBUFS55: |
2046 | case EWOULDBLOCK35: |
2047 | log_debug(" (dropped send error)"); |
2048 | f->f_dropped++; |
2049 | /* silently dropped */ |
2050 | break; |
2051 | default: |
2052 | log_debug(" (dropped permanent send error)"); |
2053 | f->f_dropped++; |
2054 | f->f_type = F_UNUSED0; |
2055 | snprintf(ebuf, sizeof(ebuf), |
2056 | "to udp loghost \"%s\"", |
2057 | f->f_un.f_forw.f_loghost); |
2058 | dropped_warn(&f->f_dropped, ebuf); |
2059 | log_warn("loghost \"%s\" disabled, sendmsg", |
2060 | f->f_un.f_forw.f_loghost); |
2061 | break; |
2062 | } |
2063 | } else { |
2064 | log_debug(""); |
2065 | if (f->f_dropped > 0) { |
2066 | snprintf(ebuf, sizeof(ebuf), |
2067 | "to udp loghost \"%s\"", |
2068 | f->f_un.f_forw.f_loghost); |
2069 | dropped_warn(&f->f_dropped, ebuf); |
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 tcpbuf full)"); |
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)"); |
2101 | f->f_dropped++; |
2102 | break; |
2103 | } |
2104 | bufferevent_enable(f->f_un.f_forw.f_bufev, EV_WRITE0x04); |
2105 | log_debug(""); |
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 > 0 && 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(""); |
2199 | wallmsg(f, iov); |
2200 | break; |
2201 | |
2202 | case F_MEMBUF7: |
2203 | log_debug(""); |
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 | int error; |
2274 | |
2275 | error = getnameinfo(f, f->sa_len, result, res_len, NULL((void *)0), 0, |
2276 | NI_NUMERICHOST1 | NI_NUMERICSERV2 | NI_DGRAM16); |
2277 | if (error) { |
2278 | log_warnx("malformed UDP from address: %s", |
2279 | gai_strerror(error)); |
2280 | strlcpy(result, hostname_unknown, res_len); |
2281 | return; |
2282 | } |
2283 | log_debug("cvthname(%s)", result); |
2284 | if (NoDNS) |
2285 | return; |
2286 | |
2287 | if (priv_getnameinfo(f, f->sa_len, result, res_len) != 0) |
2288 | log_debug("Host name for from address (%s) unknown", result); |
2289 | } |
2290 | |
2291 | void |
2292 | die_signalcb(int signum, short event, void *arg) |
2293 | { |
2294 | die(signum); |
2295 | } |
2296 | |
2297 | void |
2298 | mark_timercb(int unused, short event, void *arg) |
2299 | { |
2300 | struct event *ev = arg; |
2301 | struct timeval to; |
2302 | |
2303 | markit(); |
2304 | |
2305 | to.tv_sec = TIMERINTVL30; |
2306 | to.tv_usec = 0; |
2307 | evtimer_add(ev, &to)event_add(ev, &to); |
2308 | } |
2309 | |
2310 | void |
2311 | init_signalcb(int signum, short event, void *arg) |
2312 | { |
2313 | init(); |
2314 | log_info(LOG_INFO6, "restart"); |
2315 | |
2316 | dropped_warn(&udpsend_dropped, "to udp loghost"); |
2317 | dropped_warn(&tcpbuf_dropped, "to remote loghost"); |
2318 | dropped_warn(&file_dropped, "to file"); |
2319 | log_debug("syslogd: restarted"); |
2320 | } |
2321 | |
2322 | void |
2323 | logevent(int severity, const char *msg) |
2324 | { |
2325 | log_debug("libevent: [%d] %s", severity, msg); |
2326 | } |
2327 | |
2328 | void |
2329 | dropped_warn(int *count, const char *what) |
2330 | { |
2331 | int dropped; |
2332 | |
2333 | if (*count == 0) |
2334 | return; |
2335 | |
2336 | dropped = *count; |
2337 | *count = 0; |
2338 | log_info(LOG_WARNING4, "dropped %d message%s %s", |
2339 | dropped, dropped == 1 ? "" : "s", what); |
2340 | } |
2341 | |
2342 | __dead__attribute__((__noreturn__)) void |
2343 | die(int signo) |
2344 | { |
2345 | struct filed *f; |
2346 | |
2347 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void *)0); ( f) = ((f)->f_next.sqe_next)) { |
2348 | /* flush any pending output */ |
2349 | if (f->f_prevcount) |
2350 | fprintlog(f, 0, (char *)NULL((void *)0)); |
2351 | if (f->f_type == F_FORWUDP4) { |
2352 | udpsend_dropped += f->f_dropped; |
2353 | f->f_dropped = 0; |
2354 | } |
2355 | if (f->f_type == F_FORWTLS10 || f->f_type == F_FORWTCP9) { |
2356 | tcpbuf_dropped += f->f_dropped + |
2357 | tcpbuf_countmsg(f->f_un.f_forw.f_bufev); |
2358 | f->f_dropped = 0; |
2359 | } |
2360 | if (f->f_type == F_FILE1) { |
2361 | file_dropped += f->f_dropped; |
2362 | f->f_dropped = 0; |
2363 | } |
2364 | } |
2365 | dropped_warn(&init_dropped, "during initialization"); |
2366 | dropped_warn(&udpsend_dropped, "to udp loghost"); |
2367 | dropped_warn(&tcpbuf_dropped, "to remote loghost"); |
2368 | dropped_warn(&file_dropped, "to file"); |
2369 | |
2370 | if (signo) |
2371 | log_info(LOG_ERR3, "exiting on signal %d", signo); |
2372 | log_debug("syslogd: exited"); |
2373 | exit(0); |
2374 | } |
2375 | |
2376 | /* |
2377 | * INIT -- Initialize syslogd from configuration table |
2378 | */ |
2379 | void |
2380 | init(void) |
2381 | { |
2382 | char progblock[NAME_MAX255+1], hostblock[NAME_MAX255+1], *cline, *p, *q; |
2383 | struct filed_list mb; |
2384 | struct filed *f, *m; |
2385 | FILE *cf; |
2386 | int i; |
2387 | size_t s; |
2388 | |
2389 | log_debug("init"); |
2390 | |
2391 | /* If config file has been modified, then just die to restart */ |
2392 | if (priv_config_modified()) { |
2393 | log_debug("config file changed: dying"); |
2394 | die(0); |
2395 | } |
2396 | |
2397 | /* |
2398 | * Close all open log files. |
2399 | */ |
2400 | Initialized = 0; |
2401 | SIMPLEQ_INIT(&mb)do { (&mb)->sqh_first = ((void *)0); (&mb)->sqh_last = &(&mb)->sqh_first; } while (0); |
2402 | while (!SIMPLEQ_EMPTY(&Files)(((&Files)->sqh_first) == ((void *)0))) { |
2403 | f = SIMPLEQ_FIRST(&Files)((&Files)->sqh_first); |
2404 | 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); |
2405 | /* flush any pending output */ |
2406 | if (f->f_prevcount) |
2407 | fprintlog(f, 0, (char *)NULL((void *)0)); |
2408 | |
2409 | switch (f->f_type) { |
2410 | case F_FORWUDP4: |
2411 | evtimer_del(&f->f_un.f_forw.f_ev)event_del(&f->f_un.f_forw.f_ev); |
2412 | udpsend_dropped += f->f_dropped; |
2413 | f->f_dropped = 0; |
2414 | free(f->f_un.f_forw.f_ipproto); |
2415 | free(f->f_un.f_forw.f_host); |
2416 | free(f->f_un.f_forw.f_port); |
2417 | break; |
2418 | case F_FORWTLS10: |
2419 | if (f->f_un.f_forw.f_ctx) { |
2420 | tls_close(f->f_un.f_forw.f_ctx); |
2421 | tls_free(f->f_un.f_forw.f_ctx); |
2422 | } |
2423 | /* FALLTHROUGH */ |
2424 | case F_FORWTCP9: |
2425 | evtimer_del(&f->f_un.f_forw.f_ev)event_del(&f->f_un.f_forw.f_ev); |
2426 | tcpbuf_dropped += f->f_dropped; |
2427 | if (f->f_un.f_forw.f_bufev) { |
2428 | bufferevent_disable(f->f_un.f_forw.f_bufev, |
2429 | EV_READ0x02|EV_WRITE0x04); |
2430 | tcpbuf_dropped += |
2431 | tcpbuf_countmsg(f->f_un.f_forw.f_bufev); |
2432 | bufferevent_free(f->f_un.f_forw.f_bufev); |
2433 | } |
2434 | free(f->f_un.f_forw.f_ipproto); |
2435 | free(f->f_un.f_forw.f_host); |
2436 | free(f->f_un.f_forw.f_port); |
2437 | /* FALLTHROUGH */ |
2438 | case F_FILE1: |
2439 | if (f->f_type == F_FILE1) |
2440 | file_dropped += f->f_dropped; |
2441 | f->f_dropped = 0; |
2442 | /* FALLTHROUGH */ |
2443 | case F_TTY2: |
2444 | case F_CONSOLE3: |
2445 | case F_PIPE8: |
2446 | (void)close(f->f_file); |
2447 | break; |
2448 | } |
2449 | free(f->f_program); |
2450 | free(f->f_hostname); |
2451 | if (f->f_type == F_MEMBUF7) { |
2452 | f->f_program = NULL((void *)0); |
2453 | f->f_hostname = NULL((void *)0); |
2454 | log_debug("add %p to mb", f); |
2455 | 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); |
2456 | } else |
2457 | free(f); |
2458 | } |
2459 | SIMPLEQ_INIT(&Files)do { (&Files)->sqh_first = ((void *)0); (&Files)-> sqh_last = &(&Files)->sqh_first; } while (0); |
2460 | |
2461 | /* open the configuration file */ |
2462 | if ((cf = priv_open_config()) == NULL((void *)0)) { |
2463 | log_debug("cannot open %s", ConfFile); |
2464 | 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) |
2465 | 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); |
2466 | 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) |
2467 | 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); |
2468 | Initialized = 1; |
2469 | dropped_warn(&init_dropped, "during initialization"); |
2470 | return; |
2471 | } |
2472 | |
2473 | /* |
2474 | * Foreach line in the conf table, open that file. |
2475 | */ |
2476 | cline = NULL((void *)0); |
2477 | s = 0; |
2478 | strlcpy(progblock, "*", sizeof(progblock)); |
2479 | strlcpy(hostblock, "*", sizeof(hostblock)); |
2480 | send_udp = send_udp6 = 0; |
2481 | while (getline(&cline, &s, cf) != -1) { |
2482 | /* |
2483 | * check for end-of-section, comments, strip off trailing |
2484 | * spaces and newline character. !progblock and +hostblock |
2485 | * are treated specially: the following lines apply only to |
2486 | * that program. |
2487 | */ |
2488 | for (p = cline; isspace((unsigned char)*p); ++p) |
2489 | continue; |
2490 | if (*p == '\0' || *p == '#') |
2491 | continue; |
2492 | if (*p == '!' || *p == '+') { |
2493 | q = (*p == '!') ? progblock : hostblock; |
2494 | p++; |
2495 | while (isspace((unsigned char)*p)) |
2496 | p++; |
2497 | if (*p == '\0' || (*p == '*' && (p[1] == '\0' || |
2498 | isspace((unsigned char)p[1])))) { |
2499 | strlcpy(q, "*", NAME_MAX255+1); |
2500 | continue; |
2501 | } |
2502 | for (i = 0; i < NAME_MAX255; i++) { |
2503 | if (*p == '\0' || isspace((unsigned char)*p)) |
2504 | break; |
2505 | *q++ = *p++; |
2506 | } |
2507 | *q = '\0'; |
2508 | continue; |
2509 | } |
2510 | |
2511 | p = cline + strlen(cline); |
2512 | while (p > cline) |
2513 | if (!isspace((unsigned char)*--p)) { |
2514 | p++; |
2515 | break; |
2516 | } |
2517 | *p = '\0'; |
2518 | f = cfline(cline, progblock, hostblock); |
2519 | if (f != NULL((void *)0)) |
2520 | 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); |
2521 | } |
2522 | free(cline); |
2523 | if (!feof(cf)(!__isthreaded ? (((cf)->_flags & 0x0020) != 0) : (feof )(cf))) |
2524 | fatal("read config file"); |
2525 | |
2526 | /* Match and initialize the memory buffers */ |
2527 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void *)0); ( f) = ((f)->f_next.sqe_next)) { |
2528 | if (f->f_type != F_MEMBUF7) |
2529 | continue; |
2530 | log_debug("Initialize membuf %s at %p", |
2531 | f->f_un.f_mb.f_mname, f); |
2532 | |
2533 | SIMPLEQ_FOREACH(m, &mb, f_next)for((m) = ((&mb)->sqh_first); (m) != ((void *)0); (m) = ((m)->f_next.sqe_next)) { |
2534 | if (m->f_un.f_mb.f_rb == NULL((void *)0)) |
2535 | continue; |
2536 | if (strcmp(m->f_un.f_mb.f_mname, |
2537 | f->f_un.f_mb.f_mname) == 0) |
2538 | break; |
2539 | } |
2540 | if (m == NULL((void *)0)) { |
2541 | log_debug("Membuf no match"); |
2542 | f->f_un.f_mb.f_rb = ringbuf_init(f->f_un.f_mb.f_len); |
2543 | if (f->f_un.f_mb.f_rb == NULL((void *)0)) { |
2544 | f->f_type = F_UNUSED0; |
2545 | log_warn("allocate membuf"); |
2546 | } |
2547 | } else { |
2548 | log_debug("Membuf match f:%p, m:%p", f, m); |
2549 | f->f_un = m->f_un; |
2550 | m->f_un.f_mb.f_rb = NULL((void *)0); |
2551 | } |
2552 | } |
2553 | |
2554 | /* make sure remaining buffers are freed */ |
2555 | while (!SIMPLEQ_EMPTY(&mb)(((&mb)->sqh_first) == ((void *)0))) { |
2556 | m = SIMPLEQ_FIRST(&mb)((&mb)->sqh_first); |
2557 | 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); |
2558 | if (m->f_un.f_mb.f_rb != NULL((void *)0)) { |
2559 | log_warnx("mismatched membuf"); |
2560 | ringbuf_free(m->f_un.f_mb.f_rb); |
2561 | } |
2562 | log_debug("Freeing membuf %p", m); |
2563 | |
2564 | free(m); |
2565 | } |
2566 | |
2567 | /* close the configuration file */ |
2568 | (void)fclose(cf); |
2569 | |
2570 | Initialized = 1; |
2571 | dropped_warn(&init_dropped, "during initialization"); |
2572 | |
2573 | if (SecureMode) { |
2574 | /* |
2575 | * If generic UDP file descriptors are used neither |
2576 | * for receiving nor for sending, close them. Then |
2577 | * there is no useless *.514 in netstat. |
2578 | */ |
2579 | if (fd_udp != -1 && !send_udp) { |
2580 | close(fd_udp); |
2581 | fd_udp = -1; |
2582 | } |
2583 | if (fd_udp6 != -1 && !send_udp6) { |
2584 | close(fd_udp6); |
2585 | fd_udp6 = -1; |
2586 | } |
2587 | } |
2588 | |
2589 | if (Debug) { |
2590 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void *)0); ( f) = ((f)->f_next.sqe_next)) { |
2591 | for (i = 0; i <= LOG_NFACILITIES24; i++) |
2592 | if (f->f_pmask[i] == INTERNAL_NOPRI0x10) |
2593 | printf("X "); |
2594 | else |
2595 | printf("%d ", f->f_pmask[i]); |
2596 | printf("%s: ", TypeNames[f->f_type]); |
2597 | switch (f->f_type) { |
2598 | case F_FILE1: |
2599 | case F_TTY2: |
2600 | case F_CONSOLE3: |
2601 | case F_PIPE8: |
2602 | printf("%s", f->f_un.f_fname); |
2603 | break; |
2604 | |
2605 | case F_FORWUDP4: |
2606 | case F_FORWTCP9: |
2607 | case F_FORWTLS10: |
2608 | printf("%s", f->f_un.f_forw.f_loghost); |
2609 | break; |
2610 | |
2611 | case F_USERS5: |
2612 | for (i = 0; i < MAXUNAMES20 && |
2613 | *f->f_un.f_uname[i]; i++) |
2614 | printf("%s, ", f->f_un.f_uname[i]); |
2615 | break; |
2616 | |
2617 | case F_MEMBUF7: |
2618 | printf("%s", f->f_un.f_mb.f_mname); |
2619 | break; |
2620 | |
2621 | } |
2622 | if (f->f_program || f->f_hostname) |
2623 | printf(" (%s, %s)", |
2624 | f->f_program ? f->f_program : "*", |
2625 | f->f_hostname ? f->f_hostname : "*"); |
2626 | printf("\n"); |
2627 | } |
2628 | } |
2629 | } |
2630 | |
2631 | #define progmatches(p1, p2)(p1 == p2 || (p1 != ((void *)0) && p2 != ((void *)0) && strcmp(p1, p2) == 0)) \ |
2632 | (p1 == p2 || (p1 != NULL((void *)0) && p2 != NULL((void *)0) && strcmp(p1, p2) == 0)) |
2633 | |
2634 | /* |
2635 | * Spot a line with a duplicate file, pipe, console, tty, or membuf target. |
2636 | */ |
2637 | struct filed * |
2638 | find_dup(struct filed *f) |
2639 | { |
2640 | struct filed *list; |
2641 | |
2642 | SIMPLEQ_FOREACH(list, &Files, f_next)for((list) = ((&Files)->sqh_first); (list) != ((void * )0); (list) = ((list)->f_next.sqe_next)) { |
2643 | if (list->f_quick || f->f_quick) |
2644 | continue; |
2645 | switch (list->f_type) { |
2646 | case F_FILE1: |
2647 | case F_TTY2: |
2648 | case F_CONSOLE3: |
2649 | case F_PIPE8: |
2650 | if (strcmp(list->f_un.f_fname, f->f_un.f_fname) == 0 && |
2651 | 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)) && |
2652 | 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))) { |
2653 | log_debug("duplicate %s", f->f_un.f_fname); |
2654 | return (list); |
2655 | } |
2656 | break; |
2657 | case F_MEMBUF7: |
2658 | if (strcmp(list->f_un.f_mb.f_mname, |
2659 | f->f_un.f_mb.f_mname) == 0 && |
2660 | 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)) && |
2661 | 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))) { |
2662 | log_debug("duplicate membuf %s", |
2663 | f->f_un.f_mb.f_mname); |
2664 | return (list); |
2665 | } |
2666 | break; |
2667 | } |
2668 | } |
2669 | return (NULL((void *)0)); |
2670 | } |
2671 | |
2672 | /* |
2673 | * Crack a configuration file line |
2674 | */ |
2675 | struct filed * |
2676 | cfline(char *line, char *progblock, char *hostblock) |
2677 | { |
2678 | int i, pri; |
2679 | size_t rb_len; |
2680 | char *bp, *p, *q, *proto, *host, *port, *ipproto; |
2681 | char buf[LOG_MAXLINE8192]; |
2682 | struct filed *xf, *f, *d; |
2683 | struct timeval to; |
2684 | |
2685 | log_debug("cfline(\"%s\", f, \"%s\", \"%s\")", |
2686 | line, progblock, hostblock); |
2687 | |
2688 | if ((f = calloc(1, sizeof(*f))) == NULL((void *)0)) |
2689 | fatal("allocate struct filed"); |
2690 | for (i = 0; i <= LOG_NFACILITIES24; i++) |
2691 | f->f_pmask[i] = INTERNAL_NOPRI0x10; |
2692 | |
2693 | /* save program name if any */ |
2694 | f->f_quick = 0; |
2695 | if (*progblock == '!') { |
2696 | progblock++; |
2697 | f->f_quick = 1; |
2698 | } |
2699 | if (*hostblock == '+') { |
2700 | hostblock++; |
2701 | f->f_quick = 1; |
2702 | } |
2703 | if (strcmp(progblock, "*") != 0) |
2704 | f->f_program = strdup(progblock); |
2705 | if (strcmp(hostblock, "*") != 0) |
2706 | f->f_hostname = strdup(hostblock); |
2707 | |
2708 | /* scan through the list of selectors */ |
2709 | for (p = line; *p && *p != '\t' && *p != ' ';) { |
2710 | |
2711 | /* find the end of this facility name list */ |
2712 | for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; ) |
2713 | continue; |
2714 | |
2715 | /* collect priority name */ |
2716 | for (bp = buf; *q && !strchr("\t,; ", *q); ) |
2717 | *bp++ = *q++; |
2718 | *bp = '\0'; |
2719 | |
2720 | /* skip cruft */ |
2721 | while (*q && strchr(",;", *q)) |
2722 | q++; |
2723 | |
2724 | /* decode priority name */ |
2725 | if (*buf == '*') |
2726 | pri = LOG_PRIMASK0x07 + 1; |
2727 | else { |
2728 | /* ignore trailing spaces */ |
2729 | for (i=strlen(buf)-1; i >= 0 && buf[i] == ' '; i--) { |
2730 | buf[i]='\0'; |
2731 | } |
2732 | |
2733 | pri = decode(buf, prioritynames); |
2734 | if (pri < 0) { |
2735 | log_warnx("unknown priority name \"%s\"", buf); |
2736 | free(f); |
2737 | return (NULL((void *)0)); |
2738 | } |
2739 | } |
2740 | |
2741 | /* scan facilities */ |
2742 | while (*p && !strchr("\t.; ", *p)) { |
2743 | for (bp = buf; *p && !strchr("\t,;. ", *p); ) |
2744 | *bp++ = *p++; |
2745 | *bp = '\0'; |
2746 | if (*buf == '*') |
2747 | for (i = 0; i < LOG_NFACILITIES24; i++) |
2748 | f->f_pmask[i] = pri; |
2749 | else { |
2750 | i = decode(buf, facilitynames); |
2751 | if (i < 0) { |
2752 | log_warnx("unknown facility name " |
2753 | "\"%s\"", buf); |
2754 | free(f); |
2755 | return (NULL((void *)0)); |
2756 | } |
2757 | f->f_pmask[i >> 3] = pri; |
2758 | } |
2759 | while (*p == ',' || *p == ' ') |
2760 | p++; |
2761 | } |
2762 | |
2763 | p = q; |
2764 | } |
2765 | |
2766 | /* skip to action part */ |
2767 | while (*p == '\t' || *p == ' ') |
2768 | p++; |
2769 | |
2770 | switch (*p) { |
2771 | case '@': |
2772 | if ((strlcpy(f->f_un.f_forw.f_loghost, p, |
2773 | sizeof(f->f_un.f_forw.f_loghost)) >= |
2774 | sizeof(f->f_un.f_forw.f_loghost))) { |
2775 | log_warnx("loghost too long \"%s\"", p); |
2776 | break; |
2777 | } |
2778 | if (loghost_parse(++p, &proto, &host, &port) == -1) { |
2779 | log_warnx("bad loghost \"%s\"", |
2780 | f->f_un.f_forw.f_loghost); |
2781 | break; |
2782 | } |
2783 | if (proto == NULL((void *)0)) |
2784 | proto = "udp"; |
2785 | if (strcmp(proto, "udp") == 0) { |
2786 | if (fd_udp == -1) |
2787 | proto = "udp6"; |
2788 | if (fd_udp6 == -1) |
2789 | proto = "udp4"; |
2790 | } |
2791 | ipproto = proto; |
2792 | if (strcmp(proto, "udp") == 0) { |
2793 | send_udp = send_udp6 = 1; |
2794 | } else if (strcmp(proto, "udp4") == 0) { |
2795 | send_udp = 1; |
2796 | if (fd_udp == -1) { |
2797 | log_warnx("no udp4 \"%s\"", |
2798 | f->f_un.f_forw.f_loghost); |
2799 | break; |
2800 | } |
2801 | } else if (strcmp(proto, "udp6") == 0) { |
2802 | send_udp6 = 1; |
2803 | if (fd_udp6 == -1) { |
2804 | log_warnx("no udp6 \"%s\"", |
2805 | f->f_un.f_forw.f_loghost); |
2806 | break; |
2807 | } |
2808 | } else if (strcmp(proto, "tcp") == 0 || |
2809 | strcmp(proto, "tcp4") == 0 || strcmp(proto, "tcp6") == 0) { |
2810 | ; |
2811 | } else if (strcmp(proto, "tls") == 0) { |
2812 | ipproto = "tcp"; |
2813 | } else if (strcmp(proto, "tls4") == 0) { |
2814 | ipproto = "tcp4"; |
2815 | } else if (strcmp(proto, "tls6") == 0) { |
2816 | ipproto = "tcp6"; |
2817 | } else { |
2818 | log_warnx("bad protocol \"%s\"", |
2819 | f->f_un.f_forw.f_loghost); |
2820 | break; |
2821 | } |
2822 | if (strlen(host) >= NI_MAXHOST256) { |
2823 | log_warnx("host too long \"%s\"", |
2824 | f->f_un.f_forw.f_loghost); |
2825 | break; |
2826 | } |
2827 | if (port == NULL((void *)0)) |
2828 | port = strncmp(proto, "tls", 3) == 0 ? |
2829 | "syslog-tls" : "syslog"; |
2830 | if (strlen(port) >= NI_MAXSERV32) { |
2831 | log_warnx("port too long \"%s\"", |
2832 | f->f_un.f_forw.f_loghost); |
2833 | break; |
2834 | } |
2835 | f->f_un.f_forw.f_ipproto = strdup(ipproto); |
2836 | f->f_un.f_forw.f_host = strdup(host); |
2837 | f->f_un.f_forw.f_port = strdup(port); |
2838 | if (f->f_un.f_forw.f_ipproto == NULL((void *)0) || |
2839 | f->f_un.f_forw.f_host == NULL((void *)0) || |
2840 | f->f_un.f_forw.f_port == NULL((void *)0)) { |
2841 | log_warnx("strdup ipproto host port \"%s\"", |
2842 | f->f_un.f_forw.f_loghost); |
2843 | free(f->f_un.f_forw.f_ipproto); |
2844 | free(f->f_un.f_forw.f_host); |
2845 | free(f->f_un.f_forw.f_port); |
2846 | break; |
2847 | } |
2848 | f->f_file = -1; |
2849 | loghost_resolve(f); |
2850 | if (strncmp(proto, "udp", 3) == 0) { |
2851 | evtimer_set(&f->f_un.f_forw.f_ev, udp_resolvecb, f)event_set(&f->f_un.f_forw.f_ev, -1, 0, udp_resolvecb, f ); |
2852 | switch (f->f_un.f_forw.f_addr.ss_family) { |
2853 | case AF_UNSPEC0: |
2854 | log_debug("resolve \"%s\" delayed", |
2855 | f->f_un.f_forw.f_loghost); |
2856 | to.tv_sec = 0; |
2857 | to.tv_usec = 1; |
2858 | evtimer_add(&f->f_un.f_forw.f_ev, &to)event_add(&f->f_un.f_forw.f_ev, &to); |
2859 | break; |
2860 | case AF_INET2: |
2861 | f->f_file = fd_udp; |
2862 | break; |
2863 | case AF_INET624: |
2864 | f->f_file = fd_udp6; |
2865 | break; |
2866 | } |
2867 | f->f_type = F_FORWUDP4; |
2868 | } else if (strncmp(ipproto, "tcp", 3) == 0) { |
2869 | if ((f->f_un.f_forw.f_bufev = bufferevent_new(-1, |
2870 | tcp_dropcb, tcp_writecb, tcp_errorcb, f)) == NULL((void *)0)) { |
2871 | log_warn("bufferevent \"%s\"", |
2872 | f->f_un.f_forw.f_loghost); |
2873 | free(f->f_un.f_forw.f_ipproto); |
2874 | free(f->f_un.f_forw.f_host); |
2875 | free(f->f_un.f_forw.f_port); |
2876 | break; |
2877 | } |
2878 | /* |
2879 | * If we try to connect to a TLS server immediately |
2880 | * syslogd gets an SIGPIPE as the signal handlers have |
2881 | * not been set up. Delay the connection until the |
2882 | * event loop is started. |
2883 | */ |
2884 | evtimer_set(&f->f_un.f_forw.f_ev, tcp_connectcb, f)event_set(&f->f_un.f_forw.f_ev, -1, 0, tcp_connectcb, f ); |
2885 | to.tv_sec = 0; |
2886 | to.tv_usec = 1; |
2887 | evtimer_add(&f->f_un.f_forw.f_ev, &to)event_add(&f->f_un.f_forw.f_ev, &to); |
2888 | f->f_type = (strncmp(proto, "tls", 3) == 0) ? |
2889 | F_FORWTLS10 : F_FORWTCP9; |
2890 | } |
2891 | break; |
2892 | |
2893 | case '/': |
2894 | case '|': |
2895 | (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname)); |
2896 | d = find_dup(f); |
2897 | if (d != NULL((void *)0)) { |
2898 | for (i = 0; i <= LOG_NFACILITIES24; i++) |
2899 | if (f->f_pmask[i] != INTERNAL_NOPRI0x10) |
2900 | d->f_pmask[i] = f->f_pmask[i]; |
2901 | free(f); |
2902 | return (NULL((void *)0)); |
2903 | } |
2904 | if (strcmp(p, ctty) == 0) { |
2905 | f->f_file = priv_open_tty(p); |
2906 | if (f->f_file < 0) |
2907 | log_warn("priv_open_tty \"%s\"", p); |
2908 | } else { |
2909 | f->f_file = priv_open_log(p); |
2910 | if (f->f_file < 0) |
2911 | log_warn("priv_open_log \"%s\"", p); |
2912 | } |
2913 | if (f->f_file < 0) { |
2914 | f->f_type = F_UNUSED0; |
2915 | break; |
2916 | } |
2917 | if (isatty(f->f_file)) { |
2918 | if (strcmp(p, ctty) == 0) |
2919 | f->f_type = F_CONSOLE3; |
2920 | else |
2921 | f->f_type = F_TTY2; |
2922 | } else { |
2923 | if (*p == '|') |
2924 | f->f_type = F_PIPE8; |
2925 | else { |
2926 | f->f_type = F_FILE1; |
2927 | |
2928 | /* Clear O_NONBLOCK flag on f->f_file */ |
2929 | if ((i = fcntl(f->f_file, F_GETFL3)) != -1) { |
2930 | i &= ~O_NONBLOCK0x0004; |
2931 | fcntl(f->f_file, F_SETFL4, i); |
2932 | } |
2933 | } |
2934 | } |
2935 | break; |
2936 | |
2937 | case '*': |
2938 | f->f_type = F_WALL6; |
2939 | break; |
2940 | |
2941 | case ':': |
2942 | f->f_type = F_MEMBUF7; |
2943 | |
2944 | /* Parse buffer size (in kb) */ |
2945 | errno(*__errno()) = 0; |
2946 | rb_len = strtoul(++p, &q, 0); |
2947 | if (*p == '\0' || (errno(*__errno()) == ERANGE34 && rb_len == ULONG_MAX0xffffffffffffffffUL) || |
2948 | *q != ':' || rb_len == 0) { |
2949 | f->f_type = F_UNUSED0; |
2950 | log_warnx("strtoul \"%s\"", p); |
2951 | break; |
2952 | } |
2953 | q++; |
2954 | rb_len *= 1024; |
2955 | |
2956 | /* Copy buffer name */ |
2957 | for(i = 0; (size_t)i < sizeof(f->f_un.f_mb.f_mname) - 1; i++) { |
2958 | if (!isalnum((unsigned char)q[i])) |
2959 | break; |
2960 | f->f_un.f_mb.f_mname[i] = q[i]; |
2961 | } |
2962 | |
2963 | /* Make sure buffer name is unique */ |
2964 | xf = find_dup(f); |
2965 | |
2966 | /* Error on missing or non-unique name, or bad buffer length */ |
2967 | if (i == 0 || rb_len > MAX_MEMBUF(256 * 1024) || xf != NULL((void *)0)) { |
2968 | f->f_type = F_UNUSED0; |
2969 | log_warnx("find_dup \"%s\"", p); |
2970 | break; |
2971 | } |
2972 | |
2973 | /* Set buffer length */ |
2974 | rb_len = MAXIMUM(rb_len, MIN_MEMBUF)(((rb_len) > ((8192 * 4))) ? (rb_len) : ((8192 * 4))); |
2975 | f->f_un.f_mb.f_len = rb_len; |
2976 | f->f_un.f_mb.f_overflow = 0; |
2977 | f->f_un.f_mb.f_attached = 0; |
2978 | break; |
2979 | |
2980 | default: |
2981 | for (i = 0; i < MAXUNAMES20 && *p; i++) { |
2982 | for (q = p; *q && *q != ','; ) |
2983 | q++; |
2984 | (void)strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE32); |
2985 | if ((q - p) > UT_NAMESIZE32) |
2986 | f->f_un.f_uname[i][UT_NAMESIZE32] = '\0'; |
2987 | else |
2988 | f->f_un.f_uname[i][q - p] = '\0'; |
2989 | while (*q == ',' || *q == ' ') |
2990 | q++; |
2991 | p = q; |
2992 | } |
2993 | f->f_type = F_USERS5; |
2994 | break; |
2995 | } |
2996 | return (f); |
2997 | } |
2998 | |
2999 | /* |
3000 | * Parse the host and port parts from a loghost string. |
3001 | */ |
3002 | int |
3003 | loghost_parse(char *str, char **proto, char **host, char **port) |
3004 | { |
3005 | char *prefix = NULL((void *)0); |
3006 | |
3007 | if ((*host = strchr(str, ':')) && |
3008 | (*host)[1] == '/' && (*host)[2] == '/') { |
3009 | prefix = str; |
3010 | **host = '\0'; |
3011 | str = *host + 3; |
3012 | } |
3013 | if (proto) |
3014 | *proto = prefix; |
3015 | else if (prefix) |
3016 | return (-1); |
3017 | |
3018 | *host = str; |
3019 | if (**host == '[') { |
3020 | (*host)++; |
3021 | str = strchr(*host, ']'); |
3022 | if (str == NULL((void *)0)) |
3023 | return (-1); |
3024 | *str++ = '\0'; |
3025 | } |
3026 | *port = strrchr(str, ':'); |
3027 | if (*port != NULL((void *)0)) |
3028 | *(*port)++ = '\0'; |
3029 | |
3030 | return (0); |
3031 | } |
3032 | |
3033 | /* |
3034 | * Retrieve the size of the kernel message buffer, via sysctl. |
3035 | */ |
3036 | int |
3037 | getmsgbufsize(void) |
3038 | { |
3039 | int msgbufsize, mib[2]; |
3040 | size_t size; |
3041 | |
3042 | mib[0] = CTL_KERN1; |
3043 | mib[1] = KERN_MSGBUFSIZE38; |
3044 | size = sizeof msgbufsize; |
3045 | if (sysctl(mib, 2, &msgbufsize, &size, NULL((void *)0), 0) == -1) { |
3046 | log_debug("couldn't get kern.msgbufsize"); |
3047 | return (0); |
3048 | } |
3049 | return (msgbufsize); |
3050 | } |
3051 | |
3052 | /* |
3053 | * Decode a symbolic name to a numeric value |
3054 | */ |
3055 | int |
3056 | decode(const char *name, const CODE *codetab) |
3057 | { |
3058 | const CODE *c; |
3059 | char *p, buf[40]; |
3060 | |
3061 | for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) { |
3062 | if (isupper((unsigned char)*name)) |
3063 | *p = tolower((unsigned char)*name); |
3064 | else |
3065 | *p = *name; |
3066 | } |
3067 | *p = '\0'; |
3068 | for (c = codetab; c->c_name; c++) |
3069 | if (!strcmp(buf, c->c_name)) |
3070 | return (c->c_val); |
3071 | |
3072 | return (-1); |
3073 | } |
3074 | |
3075 | void |
3076 | markit(void) |
3077 | { |
3078 | struct msg msg; |
3079 | struct filed *f; |
3080 | |
3081 | msg.m_pri = LOG_INFO6; |
3082 | current_time(msg.m_timestamp); |
3083 | msg.m_prog[0] = '\0'; |
3084 | strlcpy(msg.m_msg, "-- MARK --", sizeof(msg.m_msg)); |
3085 | MarkSeq += TIMERINTVL30; |
3086 | if (MarkSeq >= MarkInterval) { |
3087 | logmsg(&msg, MARK0x008, LocalHostName); |
3088 | MarkSeq = 0; |
3089 | } |
3090 | |
3091 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void *)0); ( f) = ((f)->f_next.sqe_next)) { |
3092 | if (f->f_prevcount && now.tv_sec >= REPEATTIME(f)((f)->f_time + repeatinterval[(f)->f_repeatcount])) { |
3093 | log_debug("flush %s: repeated %d times, %d sec", |
3094 | TypeNames[f->f_type], f->f_prevcount, |
3095 | repeatinterval[f->f_repeatcount]); |
3096 | fprintlog(f, 0, (char *)NULL((void *)0)); |
3097 | BACKOFF(f){ if (++(f)->f_repeatcount > ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)) (f)->f_repeatcount = ((sizeof (repeatinterval) / sizeof(repeatinterval[0])) - 1); }; |
3098 | } |
3099 | } |
3100 | } |
3101 | |
3102 | int |
3103 | unix_socket(char *path, int type, mode_t mode) |
3104 | { |
3105 | struct sockaddr_un s_un; |
3106 | int fd, optval; |
3107 | mode_t old_umask; |
3108 | |
3109 | memset(&s_un, 0, sizeof(s_un)); |
3110 | s_un.sun_family = AF_UNIX1; |
3111 | if (strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path)) >= |
3112 | sizeof(s_un.sun_path)) { |
3113 | log_warnx("socket path too long \"%s\"", path); |
3114 | return (-1); |
3115 | } |
3116 | |
3117 | if ((fd = socket(AF_UNIX1, type, 0)) == -1) { |
3118 | log_warn("socket unix \"%s\"", path); |
3119 | return (-1); |
3120 | } |
3121 | |
3122 | if (Debug) { |
3123 | if (connect(fd, (struct sockaddr *)&s_un, sizeof(s_un)) == 0 || |
3124 | errno(*__errno()) == EPROTOTYPE41) { |
3125 | close(fd); |
3126 | errno(*__errno()) = EISCONN56; |
3127 | log_warn("connect unix \"%s\"", path); |
3128 | return (-1); |
3129 | } |
3130 | } |
3131 | |
3132 | old_umask = umask(0177); |
3133 | |
3134 | unlink(path); |
3135 | if (bind(fd, (struct sockaddr *)&s_un, sizeof(s_un)) == -1) { |
3136 | log_warn("bind unix \"%s\"", path); |
3137 | umask(old_umask); |
3138 | close(fd); |
3139 | return (-1); |
3140 | } |
3141 | |
3142 | umask(old_umask); |
3143 | |
3144 | if (chmod(path, mode) == -1) { |
3145 | log_warn("chmod unix \"%s\"", path); |
3146 | close(fd); |
3147 | unlink(path); |
3148 | return (-1); |
3149 | } |
3150 | |
3151 | optval = LOG_MAXLINE8192 + PATH_MAX1024; |
3152 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_RCVBUF0x1002, &optval, sizeof(optval)) |
3153 | == -1) |
3154 | log_warn("setsockopt unix \"%s\"", path); |
3155 | |
3156 | return (fd); |
3157 | } |
3158 | |
3159 | /* |
3160 | * Increase socket buffer size in small steps to get partial success |
3161 | * if we hit a kernel limit. Allow an optional final step. |
3162 | */ |
3163 | void |
3164 | double_sockbuf(int fd, int optname, int bigsize) |
3165 | { |
3166 | socklen_t len; |
3167 | int i, newsize, oldsize = 0; |
3168 | |
3169 | len = sizeof(oldsize); |
3170 | if (getsockopt(fd, SOL_SOCKET0xffff, optname, &oldsize, &len) == -1) |
3171 | log_warn("getsockopt bufsize"); |
3172 | len = sizeof(newsize); |
3173 | newsize = LOG_MAXLINE8192 + 128; /* data + control */ |
3174 | /* allow 8 full length messages, that is 66560 bytes */ |
3175 | for (i = 0; i < 4; i++, newsize *= 2) { |
3176 | if (newsize <= oldsize) |
3177 | continue; |
3178 | if (setsockopt(fd, SOL_SOCKET0xffff, optname, &newsize, len) == -1) |
3179 | log_warn("setsockopt bufsize %d", newsize); |
3180 | else |
3181 | oldsize = newsize; |
3182 | } |
3183 | if (bigsize && bigsize > oldsize) { |
3184 | if (setsockopt(fd, SOL_SOCKET0xffff, optname, &bigsize, len) == -1) |
3185 | log_warn("setsockopt bufsize %d", bigsize); |
3186 | } |
3187 | } |
3188 | |
3189 | void |
3190 | set_sockbuf(int fd) |
3191 | { |
3192 | int size = 65536; |
3193 | |
3194 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_SNDBUF0x1001, &size, sizeof(size)) == -1) |
3195 | log_warn("setsockopt sndbufsize %d", size); |
3196 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_RCVBUF0x1002, &size, sizeof(size)) == -1) |
3197 | log_warn("setsockopt rcvbufsize %d", size); |
3198 | } |
3199 | |
3200 | void |
3201 | set_keepalive(int fd) |
3202 | { |
3203 | int val = 1; |
3204 | |
3205 | if (setsockopt(fd, SOL_SOCKET0xffff, SO_KEEPALIVE0x0008, &val, sizeof(val)) == -1) |
3206 | log_warn("setsockopt keepalive %d", val); |
3207 | } |
3208 | |
3209 | void |
3210 | ctlconn_cleanup(void) |
3211 | { |
3212 | struct filed *f; |
3213 | |
3214 | close(fd_ctlconn); |
3215 | fd_ctlconn = -1; |
3216 | event_del(ev_ctlread); |
3217 | event_del(ev_ctlwrite); |
3218 | event_add(ev_ctlaccept, NULL((void *)0)); |
3219 | |
3220 | if (ctl_state == CTL_WRITING_CONT_REPLY3) |
3221 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void *)0); ( f) = ((f)->f_next.sqe_next)) |
3222 | if (f->f_type == F_MEMBUF7) |
3223 | f->f_un.f_mb.f_attached = 0; |
3224 | |
3225 | ctl_state = ctl_cmd_bytes = ctl_reply_offset = ctl_reply_size = 0; |
3226 | } |
3227 | |
3228 | void |
3229 | ctlsock_acceptcb(int fd, short event, void *arg) |
3230 | { |
3231 | struct event *ev = arg; |
3232 | |
3233 | if ((fd = reserve_accept4(fd, event, ev, ctlsock_acceptcb, |
3234 | NULL((void *)0), NULL((void *)0), SOCK_NONBLOCK0x4000)) == -1) { |
3235 | if (errno(*__errno()) != ENFILE23 && errno(*__errno()) != EMFILE24 && |
3236 | errno(*__errno()) != EINTR4 && errno(*__errno()) != EWOULDBLOCK35 && |
3237 | errno(*__errno()) != ECONNABORTED53) |
3238 | log_warn("accept control socket"); |
3239 | return; |
3240 | } |
3241 | log_debug("Accepting control connection"); |
3242 | |
3243 | if (fd_ctlconn != -1) |
3244 | ctlconn_cleanup(); |
3245 | |
3246 | /* Only one connection at a time */ |
3247 | event_del(ev); |
3248 | |
3249 | fd_ctlconn = fd; |
3250 | /* file descriptor has changed, reset event */ |
3251 | event_set(ev_ctlread, fd_ctlconn, EV_READ0x02|EV_PERSIST0x10, |
3252 | ctlconn_readcb, ev_ctlread); |
3253 | event_set(ev_ctlwrite, fd_ctlconn, EV_WRITE0x04|EV_PERSIST0x10, |
3254 | ctlconn_writecb, ev_ctlwrite); |
3255 | event_add(ev_ctlread, NULL((void *)0)); |
3256 | ctl_state = CTL_READING_CMD1; |
3257 | ctl_cmd_bytes = 0; |
3258 | } |
3259 | |
3260 | static struct filed |
3261 | *find_membuf_log(const char *name) |
3262 | { |
3263 | struct filed *f; |
3264 | |
3265 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void *)0); ( f) = ((f)->f_next.sqe_next)) { |
3266 | if (f->f_type == F_MEMBUF7 && |
3267 | strcmp(f->f_un.f_mb.f_mname, name) == 0) |
3268 | break; |
3269 | } |
3270 | return (f); |
3271 | } |
3272 | |
3273 | void |
3274 | ctlconn_readcb(int fd, short event, void *arg) |
3275 | { |
3276 | struct filed *f; |
3277 | struct ctl_reply_hdr *reply_hdr = (struct ctl_reply_hdr *)ctl_reply; |
3278 | ssize_t n; |
3279 | u_int32_t flags = 0; |
3280 | |
3281 | if (ctl_state == CTL_WRITING_REPLY2 || |
3282 | ctl_state == CTL_WRITING_CONT_REPLY3) { |
3283 | /* client has closed the connection */ |
3284 | ctlconn_cleanup(); |
3285 | return; |
3286 | } |
3287 | |
3288 | retry: |
3289 | n = read(fd, (char*)&ctl_cmd + ctl_cmd_bytes, |
3290 | sizeof(ctl_cmd) - ctl_cmd_bytes); |
3291 | switch (n) { |
3292 | case -1: |
3293 | if (errno(*__errno()) == EINTR4) |
3294 | goto retry; |
3295 | if (errno(*__errno()) == EWOULDBLOCK35) |
3296 | return; |
3297 | log_warn("read control socket"); |
3298 | /* FALLTHROUGH */ |
3299 | case 0: |
3300 | ctlconn_cleanup(); |
3301 | return; |
3302 | default: |
3303 | ctl_cmd_bytes += n; |
3304 | } |
3305 | if (ctl_cmd_bytes < sizeof(ctl_cmd)) |
3306 | return; |
3307 | |
3308 | 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) { |
3309 | log_warnx("unknown client protocol version"); |
3310 | ctlconn_cleanup(); |
3311 | return; |
3312 | } |
3313 | |
3314 | /* Ensure that logname is \0 terminated */ |
3315 | if (memchr(ctl_cmd.logname, '\0', sizeof(ctl_cmd.logname)) == NULL((void *)0)) { |
3316 | log_warnx("corrupt control socket command"); |
3317 | ctlconn_cleanup(); |
3318 | return; |
3319 | } |
3320 | |
3321 | *reply_text = '\0'; |
3322 | |
3323 | ctl_reply_size = ctl_reply_offset = 0; |
3324 | memset(reply_hdr, '\0', sizeof(*reply_hdr)); |
3325 | |
3326 | 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)); |
3327 | log_debug("ctlcmd %x logname \"%s\"", ctl_cmd.cmd, ctl_cmd.logname); |
3328 | |
3329 | switch (ctl_cmd.cmd) { |
3330 | case CMD_READ1: |
3331 | case CMD_READ_CLEAR2: |
3332 | case CMD_READ_CONT6: |
3333 | case CMD_FLAGS5: |
3334 | f = find_membuf_log(ctl_cmd.logname); |
3335 | if (f == NULL((void *)0)) { |
3336 | strlcpy(reply_text, "No such log\n", MAX_MEMBUF(256 * 1024)); |
3337 | } else { |
3338 | if (ctl_cmd.cmd != CMD_FLAGS5) { |
3339 | ringbuf_to_string(reply_text, MAX_MEMBUF(256 * 1024), |
3340 | f->f_un.f_mb.f_rb); |
3341 | } |
3342 | if (f->f_un.f_mb.f_overflow) |
3343 | flags |= CTL_HDR_FLAG_OVERFLOW0x01; |
3344 | if (ctl_cmd.cmd == CMD_READ_CLEAR2) { |
3345 | ringbuf_clear(f->f_un.f_mb.f_rb); |
3346 | f->f_un.f_mb.f_overflow = 0; |
3347 | } |
3348 | if (ctl_cmd.cmd == CMD_READ_CONT6) { |
3349 | f->f_un.f_mb.f_attached = 1; |
3350 | tailify_replytext(reply_text, |
3351 | ctl_cmd.lines > 0 ? ctl_cmd.lines : 10); |
3352 | } else if (ctl_cmd.lines > 0) { |
3353 | tailify_replytext(reply_text, ctl_cmd.lines); |
3354 | } |
3355 | } |
3356 | break; |
3357 | case CMD_CLEAR3: |
3358 | f = find_membuf_log(ctl_cmd.logname); |
3359 | if (f == NULL((void *)0)) { |
3360 | strlcpy(reply_text, "No such log\n", MAX_MEMBUF(256 * 1024)); |
3361 | } else { |
3362 | ringbuf_clear(f->f_un.f_mb.f_rb); |
3363 | if (f->f_un.f_mb.f_overflow) |
3364 | flags |= CTL_HDR_FLAG_OVERFLOW0x01; |
3365 | f->f_un.f_mb.f_overflow = 0; |
3366 | strlcpy(reply_text, "Log cleared\n", MAX_MEMBUF(256 * 1024)); |
3367 | } |
3368 | break; |
3369 | case CMD_LIST4: |
3370 | SIMPLEQ_FOREACH(f, &Files, f_next)for((f) = ((&Files)->sqh_first); (f) != ((void *)0); ( f) = ((f)->f_next.sqe_next)) { |
3371 | if (f->f_type == F_MEMBUF7) { |
3372 | strlcat(reply_text, f->f_un.f_mb.f_mname, |
3373 | MAX_MEMBUF(256 * 1024)); |
3374 | if (f->f_un.f_mb.f_overflow) { |
3375 | strlcat(reply_text, "*", MAX_MEMBUF(256 * 1024)); |
3376 | flags |= CTL_HDR_FLAG_OVERFLOW0x01; |
3377 | } |
3378 | strlcat(reply_text, " ", MAX_MEMBUF(256 * 1024)); |
3379 | } |
3380 | } |
3381 | strlcat(reply_text, "\n", MAX_MEMBUF(256 * 1024)); |
3382 | break; |
3383 | default: |
3384 | log_warnx("unsupported control socket command"); |
3385 | ctlconn_cleanup(); |
3386 | return; |
3387 | } |
3388 | 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 )); |
3389 | 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)); |
3390 | |
3391 | ctl_reply_size = CTL_REPLY_SIZE(strlen(reply_text) + (sizeof(struct ctl_reply_hdr))); |
3392 | log_debug("ctlcmd reply length %lu", (u_long)ctl_reply_size); |
3393 | |
3394 | /* Otherwise, set up to write out reply */ |
3395 | ctl_state = (ctl_cmd.cmd == CMD_READ_CONT6) ? |
3396 | CTL_WRITING_CONT_REPLY3 : CTL_WRITING_REPLY2; |
3397 | |
3398 | event_add(ev_ctlwrite, NULL((void *)0)); |
3399 | |
3400 | /* another syslogc can kick us out */ |
3401 | if (ctl_state == CTL_WRITING_CONT_REPLY3) |
3402 | event_add(ev_ctlaccept, NULL((void *)0)); |
3403 | } |
3404 | |
3405 | void |
3406 | ctlconn_writecb(int fd, short event, void *arg) |
3407 | { |
3408 | struct event *ev = arg; |
3409 | ssize_t n; |
3410 | |
3411 | if (!(ctl_state == CTL_WRITING_REPLY2 || |
3412 | ctl_state == CTL_WRITING_CONT_REPLY3)) { |
3413 | /* Shouldn't be here! */ |
3414 | log_warnx("control socket write with bad state"); |
3415 | ctlconn_cleanup(); |
3416 | return; |
3417 | } |
3418 | |
3419 | retry: |
3420 | n = write(fd, ctl_reply + ctl_reply_offset, |
3421 | ctl_reply_size - ctl_reply_offset); |
3422 | switch (n) { |
3423 | case -1: |
3424 | if (errno(*__errno()) == EINTR4) |
3425 | goto retry; |
3426 | if (errno(*__errno()) == EWOULDBLOCK35) |
3427 | return; |
3428 | if (errno(*__errno()) != EPIPE32) |
3429 | log_warn("write control socket"); |
3430 | /* FALLTHROUGH */ |
3431 | case 0: |
3432 | ctlconn_cleanup(); |
3433 | return; |
3434 | default: |
3435 | ctl_reply_offset += n; |
3436 | } |
3437 | if (ctl_reply_offset < ctl_reply_size) |
3438 | return; |
3439 | |
3440 | if (ctl_state != CTL_WRITING_CONT_REPLY3) { |
3441 | ctlconn_cleanup(); |
3442 | return; |
3443 | } |
3444 | |
3445 | /* |
3446 | * Make space in the buffer for continuous writes. |
3447 | * Set offset behind reply header to skip it |
3448 | */ |
3449 | *reply_text = '\0'; |
3450 | ctl_reply_offset = ctl_reply_size = CTL_REPLY_SIZE(strlen(reply_text) + (sizeof(struct ctl_reply_hdr))); |
3451 | |
3452 | /* Now is a good time to report dropped lines */ |
3453 | if (membuf_drop) { |
3454 | strlcat(reply_text, "<ENOBUFS>\n", MAX_MEMBUF(256 * 1024)); |
3455 | ctl_reply_size = CTL_REPLY_SIZE(strlen(reply_text) + (sizeof(struct ctl_reply_hdr))); |
3456 | membuf_drop = 0; |
3457 | } else { |
3458 | /* Nothing left to write */ |
3459 | event_del(ev); |
3460 | } |
3461 | } |
3462 | |
3463 | /* Shorten replytext to number of lines */ |
3464 | void |
3465 | tailify_replytext(char *replytext, int lines) |
3466 | { |
3467 | char *start, *nl; |
3468 | int count = 0; |
3469 | start = nl = replytext; |
3470 | |
3471 | while ((nl = strchr(nl, '\n')) != NULL((void *)0)) { |
3472 | nl++; |
3473 | if (++count > lines) { |
3474 | start = strchr(start, '\n'); |
3475 | start++; |
3476 | } |
3477 | } |
3478 | if (start != replytext) { |
3479 | int len = strlen(start); |
3480 | memmove(replytext, start, len); |
3481 | *(replytext + len) = '\0'; |
3482 | } |
3483 | } |
3484 | |
3485 | void |
3486 | ctlconn_logto(char *line) |
3487 | { |
3488 | size_t l; |
3489 | |
3490 | if (membuf_drop) |
3491 | return; |
3492 | |
3493 | l = strlen(line); |
3494 | if (l + 2 > (CTL_REPLY_MAXSIZE((sizeof(struct ctl_reply_hdr)) + (256 * 1024)) - ctl_reply_size)) { |
3495 | /* remember line drops for later report */ |
3496 | membuf_drop = 1; |
3497 | return; |
3498 | } |
3499 | memcpy(ctl_reply + ctl_reply_size, line, l); |
3500 | memcpy(ctl_reply + ctl_reply_size + l, "\n", 2); |
3501 | ctl_reply_size += l + 1; |
3502 | event_add(ev_ctlwrite, NULL((void *)0)); |
3503 | } |