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ba0b3a0a DM |
1 | /* |
2 | ||
3 | Copyright (C) 2014 Proxmox Server Solutions GmbH | |
4 | ||
5 | This software is written by Proxmox Server Solutions GmbH <support@proxmox.com> | |
6 | ||
7 | This program is free software: you can redistribute it and/or modify | |
8 | it under the terms of the GNU Affero General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU Affero General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Affero General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | ||
20 | Author: Dietmar Maurer <dietmar@proxmox.com> | |
21 | ||
22 | */ | |
23 | ||
24 | #define _GNU_SOURCE | |
25 | ||
26 | #include <stdlib.h> | |
27 | #include <stdio.h> | |
28 | #include <errno.h> | |
29 | #include <stdarg.h> | |
30 | #include <string.h> | |
31 | #include <signal.h> | |
985fd74e | 32 | #include <sys/signalfd.h> |
7bb6e8dd | 33 | #include <sys/types.h> |
ba0b3a0a DM |
34 | #include <sys/stat.h> |
35 | #include <fcntl.h> | |
36 | #include <unistd.h> | |
37 | #include <arpa/inet.h> | |
38 | #include <sys/socket.h> | |
39 | #include <sys/file.h> | |
40 | #include <linux/netlink.h> | |
41 | #include <libnfnetlink/libnfnetlink.h> | |
42 | #include <libnetfilter_log/libnetfilter_log.h> | |
fdf943fe | 43 | #include <libnetfilter_conntrack/libnetfilter_conntrack.h> |
ba0b3a0a DM |
44 | #include <netinet/ip.h> |
45 | #include <netinet/ip_icmp.h> | |
d1b290fc WB |
46 | #include <netinet/ip6.h> |
47 | #include <netinet/icmp6.h> | |
ba0b3a0a DM |
48 | #include <netinet/udp.h> |
49 | #include <netinet/tcp.h> | |
50 | #include <netinet/if_ether.h> | |
9da3465c | 51 | #include <syslog.h> |
ba0b3a0a DM |
52 | |
53 | #include <glib.h> | |
ba0b3a0a DM |
54 | |
55 | static struct nflog_handle *logh = NULL; | |
56 | static struct nlif_handle *nlifh = NULL; | |
fdf943fe | 57 | static struct nfct_handle *nfcth = NULL; |
7bb6e8dd | 58 | GMainLoop *main_loop; |
ba0b3a0a | 59 | |
84786ec0 DM |
60 | gboolean foreground = FALSE; |
61 | gboolean debug = FALSE; | |
fdf943fe | 62 | gboolean conntrack = FALSE; |
84786ec0 | 63 | |
782c4cde | 64 | /* |
7bb6e8dd | 65 | |
782c4cde DM |
66 | LOG FORMAT: |
67 | ||
68 | Special care was taken to allow fast parsing (and filer messages for a singl VM). | |
69 | ||
7bb6e8dd | 70 | <VMID> <LOGLEVEL> <CHAIN> <TIME> <TIMEZONE> <MSG> |
782c4cde DM |
71 | |
72 | Example: | |
73 | ||
74 | 117 6 tap117i0-IN 14/Mar/2014:12:47:07 +0100 policy REJECT: IN=vmbr1 ... | |
7bb6e8dd | 75 | |
782c4cde DM |
76 | */ |
77 | ||
ba0b3a0a DM |
78 | #define LOGFILE "/var/log/pve-firewall.log" |
79 | ||
80 | #define LOCKFILE "/var/lock/pvefw-logger.lck" | |
81 | #define PIDFILE "/var/run/pvefw-logger.pid" | |
fdf943fe | 82 | #define LOG_CONNTRACK_FILE "/var/lib/pve-firewall/log_nf_conntrack" |
ba0b3a0a DM |
83 | |
84 | #define LQ_LEN 512 | |
5b06fd6c | 85 | #define LE_MAX (512 - 4) // try to fit into 512 bytes |
ba0b3a0a | 86 | |
782c4cde DM |
87 | #define MAX_CHAIN_LEN 28 |
88 | ||
7bb6e8dd | 89 | struct log_entry { |
ba0b3a0a DM |
90 | guint32 len; // max LE_MAX chars |
91 | char buf[LE_MAX]; | |
92 | }; | |
93 | ||
5b06fd6c DM |
94 | #define STATIC_ASSERT(cond) \ |
95 | extern void pve_static_assert(int test[(cond) ? 1 : -1]) | |
96 | ||
97 | STATIC_ASSERT(sizeof(struct log_entry) == 512); | |
98 | ||
ba0b3a0a DM |
99 | int outfd = -1; |
100 | ||
101 | gboolean terminate_threads = FALSE; | |
102 | ||
103 | static gboolean write_pidfile(pid_t pid) | |
104 | { | |
105 | gboolean res; | |
106 | ||
107 | char *strpid = g_strdup_printf("%d\n", pid); | |
108 | res = g_file_set_contents(PIDFILE, strpid, strlen(strpid), NULL); | |
109 | g_free(strpid); | |
110 | ||
111 | return res; | |
112 | } | |
113 | ||
114 | static GAsyncQueue *queue; | |
115 | ||
7bb6e8dd | 116 | ssize_t |
ba0b3a0a DM |
117 | safe_write(int fd, char *buf, size_t count) |
118 | { | |
119 | ssize_t n; | |
120 | ||
121 | do { | |
122 | n = write(fd, buf, count); | |
123 | } while (n < 0 && errno == EINTR); | |
124 | ||
125 | return n; | |
126 | } | |
127 | ||
128 | static gpointer | |
7bb6e8dd | 129 | log_writer_thread(gpointer data) |
ba0b3a0a DM |
130 | { |
131 | while (1) { | |
132 | struct log_entry *le = (struct log_entry *)g_async_queue_timeout_pop(queue, 250000); | |
133 | if (le == NULL) { | |
134 | if (terminate_threads) { | |
135 | return NULL; | |
136 | } | |
137 | continue; | |
138 | } | |
7bb6e8dd | 139 | |
84786ec0 DM |
140 | if (debug) fputs(le->buf, stdout); |
141 | ||
ba0b3a0a | 142 | int res = safe_write(outfd, le->buf, le->len); |
7bb6e8dd | 143 | |
ba0b3a0a DM |
144 | g_free(le); |
145 | ||
146 | if (res < 0) { | |
9da3465c | 147 | syslog(3, "writing log failed, stopping daemon - %s", strerror (errno)); |
7bb6e8dd | 148 | g_main_loop_quit(main_loop); |
9da3465c | 149 | return NULL; |
ba0b3a0a DM |
150 | } |
151 | } | |
152 | ||
153 | return NULL; | |
154 | } | |
155 | ||
156 | static int skipped_logs = 0; | |
157 | ||
782c4cde | 158 | static void log_status_message(guint loglevel, const char *fmt, ...); |
7bb6e8dd | 159 | |
ba0b3a0a DM |
160 | static void |
161 | queue_log_entry(struct log_entry *le) | |
162 | { | |
163 | gint len = g_async_queue_length(queue); | |
164 | ||
165 | if (skipped_logs > 0) { | |
166 | if (len >= (LQ_LEN - 1)) { | |
167 | skipped_logs++; | |
168 | } else { | |
7bb6e8dd | 169 | int skip_tmp = skipped_logs; |
ba0b3a0a | 170 | skipped_logs = 0; // clear before calling log_status_message() |
782c4cde | 171 | log_status_message(3, "skipped %d log entries (queue full)", skip_tmp); |
ba0b3a0a DM |
172 | g_async_queue_push(queue, le); |
173 | } | |
174 | } else { | |
175 | if (len >= LQ_LEN) { | |
176 | skipped_logs++; | |
177 | } else { | |
178 | g_async_queue_push(queue, le); | |
179 | } | |
180 | } | |
181 | } | |
182 | ||
183 | ||
6c293b5d WB |
184 | #define LEPRINTF(format, ...) \ |
185 | do { \ | |
186 | if (le->len < LE_MAX) \ | |
187 | le->len += snprintf(le->buf + le->len, LE_MAX - le->len, format, ##__VA_ARGS__); \ | |
188 | } while (0) | |
189 | #define LEPRINTTIME(sec) \ | |
190 | do { \ | |
191 | time_t tmp_sec = sec; \ | |
192 | if (le->len < (LE_MAX - 30)) \ | |
193 | le->len += strftime(le->buf + le->len, LE_MAX - le->len, "%d/%b/%Y:%H:%M:%S %z ", localtime(&tmp_sec)); \ | |
194 | } while (0) | |
ba0b3a0a | 195 | |
7bb6e8dd DM |
196 | static void |
197 | log_status_message(guint loglevel, const char *fmt, ...) | |
ba0b3a0a DM |
198 | { |
199 | va_list ap; | |
200 | va_start(ap, fmt); | |
7bb6e8dd | 201 | |
782c4cde DM |
202 | if (loglevel > 7 ) loglevel = 7; // syslog defines level 0-7 |
203 | ||
ba0b3a0a DM |
204 | struct log_entry *le = g_new0(struct log_entry, 1); |
205 | ||
782c4cde DM |
206 | LEPRINTF("0 %d - ", loglevel); |
207 | ||
ba0b3a0a DM |
208 | LEPRINTTIME(time(NULL)); |
209 | ||
210 | le->len += vsnprintf(le->buf + le->len, LE_MAX - le->len, fmt, ap); | |
211 | ||
212 | LEPRINTF("\n"); | |
213 | ||
214 | queue_log_entry(le); | |
9da3465c DM |
215 | |
216 | // also log to syslog | |
217 | ||
218 | vsyslog(loglevel, fmt, ap); | |
ba0b3a0a DM |
219 | } |
220 | ||
7bb6e8dd | 221 | static int |
ba0b3a0a DM |
222 | print_tcp(struct log_entry *le, struct tcphdr *h, int payload_len) |
223 | { | |
224 | LEPRINTF("PROTO=TCP "); | |
225 | ||
226 | if (payload_len < sizeof(struct tcphdr)) { | |
227 | LEPRINTF("LEN=%d ", payload_len); | |
228 | LEPRINTF("INVALID=LEN "); | |
229 | return -1; | |
230 | } | |
231 | ||
232 | LEPRINTF("SPT=%u DPT=%u ", ntohs(h->source), ntohs(h->dest)); | |
233 | LEPRINTF("SEQ=%u ACK=%u ", ntohl(h->seq), ntohl(h->ack_seq)); | |
234 | LEPRINTF("WINDOW=%u ", ntohs(h->window)); | |
235 | ||
236 | if (h->urg) LEPRINTF("URG "); | |
237 | if (h->ack) LEPRINTF("ACK "); | |
238 | if (h->psh) LEPRINTF("PSH "); | |
239 | if (h->rst) LEPRINTF("RST "); | |
240 | if (h->syn) LEPRINTF("SYN "); | |
241 | if (h->fin) LEPRINTF("FIN "); | |
242 | ||
243 | if (h->urg) LEPRINTF("URGP=%u ",ntohs(h->urg_ptr)); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
7bb6e8dd | 248 | static int |
ba0b3a0a DM |
249 | print_udp(struct log_entry *le, struct udphdr *h, int payload_len) |
250 | { | |
251 | LEPRINTF("PROTO=UDP "); | |
252 | ||
253 | if (payload_len < sizeof(struct udphdr)) { | |
254 | LEPRINTF("LEN=%d ", payload_len); | |
255 | LEPRINTF("INVALID=LEN "); | |
256 | return -1; | |
257 | } | |
258 | ||
259 | LEPRINTF("SPT=%u DPT=%u LEN=%u", ntohs(h->source), ntohs(h->dest), ntohs(h->len)); | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
7bb6e8dd | 264 | static int |
ba0b3a0a DM |
265 | print_icmp(struct log_entry *le, struct icmphdr *h, int payload_len) |
266 | { | |
267 | char tmp[INET_ADDRSTRLEN]; | |
268 | u_int32_t gateway; | |
269 | ||
270 | LEPRINTF("PROTO=ICMP "); | |
271 | ||
272 | if (payload_len < sizeof(struct icmphdr)) { | |
273 | LEPRINTF("LEN=%d ", payload_len); | |
274 | LEPRINTF("INVALID=LEN "); | |
275 | return -1; | |
276 | } | |
277 | ||
278 | LEPRINTF("TYPE=%u CODE=%u ", h->type, h->code); | |
279 | ||
280 | switch (h->type) { | |
281 | case ICMP_ECHO: | |
282 | case ICMP_ECHOREPLY: | |
283 | LEPRINTF("ID=%u SEQ=%u ", ntohs(h->un.echo.id), ntohs(h->un.echo.sequence)); | |
284 | break; | |
285 | case ICMP_PARAMETERPROB: | |
286 | LEPRINTF("PARAMETER=%u ", ntohl(h->un.gateway) >> 24); | |
287 | break; | |
288 | case ICMP_REDIRECT: | |
289 | gateway = ntohl(h->un.gateway); | |
7bb6e8dd | 290 | inet_ntop(AF_INET, &gateway, tmp, sizeof(tmp)); |
ba0b3a0a DM |
291 | LEPRINTF("GATEWAY=%s ", tmp); |
292 | break; | |
293 | case ICMP_DEST_UNREACH: | |
294 | if (h->code == ICMP_FRAG_NEEDED) { | |
295 | LEPRINTF("MTU=%u ", ntohs(h->un.frag.mtu)); | |
296 | } | |
297 | break; | |
298 | } | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | /* Section 3.1. SCTP Common Header Format */ | |
304 | typedef struct sctphdr { | |
305 | __be16 source; | |
306 | __be16 dest; | |
307 | __be32 vtag; | |
308 | __be32 checksum; | |
309 | } __attribute__((packed)) sctp_sctphdr_t; | |
310 | ||
7bb6e8dd | 311 | static int |
ba0b3a0a DM |
312 | print_sctp(struct log_entry *le, struct sctphdr *h, int payload_len) |
313 | { | |
314 | LEPRINTF("PROTO=SCTP "); | |
315 | ||
316 | if (payload_len < sizeof(struct sctphdr)) { | |
317 | LEPRINTF("LEN=%d ", payload_len); | |
318 | LEPRINTF("INVALID=LEN "); | |
319 | return -1; | |
320 | } | |
321 | ||
322 | LEPRINTF("SPT=%u DPT=%u ", ntohs(h->source), ntohs(h->dest)); | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
f5b3bf34 WB |
327 | static int |
328 | print_ipproto(struct log_entry *le, char * nexthdr, int payload_len, u_int8_t proto) | |
329 | { | |
330 | switch (proto) { | |
331 | case IPPROTO_TCP: | |
332 | print_tcp(le, (struct tcphdr *)nexthdr, payload_len); | |
333 | break; | |
334 | case IPPROTO_UDP: | |
335 | print_udp(le, (struct udphdr *)nexthdr, payload_len); | |
336 | break; | |
337 | case IPPROTO_ICMP: | |
338 | print_icmp(le, (struct icmphdr *)nexthdr, payload_len); | |
339 | break; | |
340 | case IPPROTO_SCTP: | |
341 | print_sctp(le, (struct sctphdr *)nexthdr, payload_len); | |
342 | break; | |
343 | case IPPROTO_AH: | |
344 | LEPRINTF("PROTO=AH "); | |
345 | break; | |
346 | case IPPROTO_ESP: | |
347 | LEPRINTF("PROTO=ESP "); | |
348 | break; | |
349 | case IPPROTO_IGMP: | |
350 | LEPRINTF("PROTO=IGMP "); | |
351 | break; | |
352 | default: | |
353 | return -1; | |
354 | } | |
355 | return 0; | |
356 | } | |
357 | ||
7bb6e8dd | 358 | static int |
ba0b3a0a DM |
359 | print_iphdr(struct log_entry *le, char * payload, int payload_len) |
360 | { | |
361 | if (payload_len < sizeof(struct iphdr)) { | |
362 | LEPRINTF("LEN=%d ", payload_len); | |
363 | LEPRINTF("INVALID=LEN "); | |
364 | return -1; | |
365 | } | |
366 | ||
367 | struct iphdr *h = (struct iphdr *)payload; | |
7bb6e8dd | 368 | |
ba0b3a0a DM |
369 | if (payload_len <= (u_int32_t)(h->ihl * 4)) { |
370 | LEPRINTF("INVALID=IHL "); | |
371 | return -1; | |
372 | } | |
373 | ||
374 | char tmp[INET_ADDRSTRLEN]; | |
7bb6e8dd DM |
375 | |
376 | inet_ntop(AF_INET, &h->saddr, tmp, sizeof(tmp)); | |
ba0b3a0a | 377 | LEPRINTF("SRC=%s ", tmp); |
7bb6e8dd | 378 | inet_ntop(AF_INET, &h->daddr, tmp, sizeof(tmp)); |
ba0b3a0a DM |
379 | LEPRINTF("DST=%s ", tmp); |
380 | ||
381 | LEPRINTF("LEN=%u TOS=0x%02X PREC=0x%02X TTL=%u ID=%u ", | |
382 | ntohs(h->tot_len), h->tos & IPTOS_TOS_MASK, | |
383 | h->tos & IPTOS_PREC_MASK, h->ttl, ntohs(h->id)); | |
7bb6e8dd | 384 | |
ba0b3a0a | 385 | short ip_off = ntohs(h->frag_off); |
7bb6e8dd | 386 | if (ip_off & IP_OFFMASK) |
ba0b3a0a DM |
387 | LEPRINTF("FRAG=%u ", ip_off & IP_OFFMASK); |
388 | ||
389 | if (ip_off & IP_DF) LEPRINTF("DF "); | |
390 | if (ip_off & IP_MF) LEPRINTF("MF "); | |
391 | ||
392 | void *nexthdr = (u_int32_t *)h + h->ihl; | |
393 | payload_len -= h->ihl * 4; | |
394 | ||
f5b3bf34 | 395 | if (print_ipproto(le, nexthdr, payload_len, h->protocol) < 0) { |
ba0b3a0a DM |
396 | LEPRINTF("PROTO=%u ", h->protocol); |
397 | } | |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
7bb6e8dd | 402 | static int |
d1b290fc | 403 | print_routing(struct log_entry *le, struct ip6_rthdr *rthdr, int payload_len) |
ba0b3a0a | 404 | { |
d1b290fc WB |
405 | char tmp[INET6_ADDRSTRLEN]; |
406 | LEPRINTF("TYPE=%u SEGMENTS=%u", rthdr->ip6r_type, rthdr->ip6r_segleft); | |
407 | ||
408 | if (payload_len < sizeof(*rthdr) || payload_len < rthdr->ip6r_len*8) { | |
409 | LEPRINTF("LEN=%d ", payload_len); | |
410 | LEPRINTF("INVALID=LEN "); | |
411 | return -1; | |
412 | } | |
413 | ||
414 | if (rthdr->ip6r_type == 0) { | |
415 | /* Route via waypoints (deprecated), this contains a list of waypoints | |
416 | * to visit. (RFC2460 (4.4)) | |
417 | */ | |
d1b290fc WB |
418 | struct ip6_rthdr0 *h = (struct ip6_rthdr0*)rthdr; |
419 | if (rthdr->ip6r_len*8 < sizeof(*h) + rthdr->ip6r_segleft * sizeof(struct in6_addr)) { | |
420 | LEPRINTF("INVALID=SEGMENTS "); | |
421 | return 0; | |
422 | } | |
423 | return 0; | |
424 | } else if (rthdr->ip6r_type == 1) { | |
425 | /* nimrod routing (RFC1992) */ | |
426 | return 0; | |
427 | } else if (rthdr->ip6r_type == 2) { | |
428 | /* RFC3375 (6.4), the layout is like type-0 but with exactly 1 address */ | |
429 | struct ip6_rthdr0 *h = (struct ip6_rthdr0*)rthdr; | |
430 | if (rthdr->ip6r_len*8 < sizeof(*h) + sizeof(struct in6_addr)) { | |
431 | LEPRINTF("LEN=%d ", payload_len); | |
432 | LEPRINTF("INVALID=LEN "); | |
433 | return -1; | |
434 | } | |
435 | inet_ntop(AF_INET6, &h->ip6r0_addr[0], tmp, sizeof(tmp)); | |
436 | LEPRINTF("HOME=%s ", tmp); | |
437 | return 0; | |
438 | } | |
ba0b3a0a DM |
439 | |
440 | return 0; | |
441 | } | |
442 | ||
d1b290fc WB |
443 | static int |
444 | print_fragment(struct log_entry *le, struct ip6_frag *frag, int payload_len) | |
445 | { | |
446 | u_int16_t offlg; | |
447 | ||
448 | if (payload_len < sizeof(*frag)) { | |
449 | LEPRINTF("LEN=%d ", payload_len); | |
450 | LEPRINTF("INVALID=LEN "); | |
451 | return -1; | |
452 | } | |
453 | ||
454 | offlg = ntohs(frag->ip6f_offlg); | |
455 | LEPRINTF("FRAG=%d ID=%d ", (offlg&0x2FFF), ntohl(frag->ip6f_ident)); | |
456 | if (offlg>>15) { | |
457 | LEPRINTF("MF "); | |
458 | } | |
459 | return 0; | |
460 | } | |
461 | ||
462 | static int | |
463 | print_icmp6(struct log_entry *le, struct icmp6_hdr *h, int payload_len) | |
464 | { | |
465 | struct nd_router_advert *ra; | |
466 | struct nd_neighbor_advert *na; | |
467 | struct nd_redirect *re; | |
468 | char tmp[INET6_ADDRSTRLEN]; | |
469 | ||
470 | if (payload_len < sizeof(struct icmp6_hdr)) { | |
471 | LEPRINTF("LEN=%d ", payload_len); | |
472 | LEPRINTF("INVALID=LEN "); | |
473 | return -1; | |
474 | } | |
475 | ||
476 | LEPRINTF("TYPE=%u CODE=%u ", h->icmp6_type, h->icmp6_code); | |
477 | ||
478 | switch (h->icmp6_type) { | |
479 | case ICMP6_ECHO_REQUEST: | |
480 | case ICMP6_ECHO_REPLY: | |
481 | LEPRINTF("ID=%u SEQ=%u ", ntohs(h->icmp6_id), ntohs(h->icmp6_seq)); | |
482 | break; | |
483 | ||
484 | case ND_ROUTER_SOLICIT: | |
485 | /* can be followed by options, otherwise nothing to print */ | |
486 | break; | |
487 | ||
488 | case ND_ROUTER_ADVERT: | |
489 | ra = (struct nd_router_advert*)h; | |
490 | LEPRINTF("HOPLIMIT=%d ", ra->nd_ra_curhoplimit); | |
491 | /* nd_ra_flags_reserved is only 8 bit, so no swapping here as | |
492 | * opposed to the neighbor advertisement flags (see below). | |
493 | */ | |
494 | LEPRINTF("RA=%02x LIFETIME=%d REACHABLE=%d RETRANSMIT=%d ", | |
495 | ra->nd_ra_flags_reserved, | |
496 | ntohs(ra->nd_ra_router_lifetime), | |
497 | ntohl(ra->nd_ra_reachable), | |
498 | ntohl(ra->nd_ra_retransmit)); | |
499 | /* can be followed by options */ | |
500 | break; | |
501 | ||
502 | case ND_NEIGHBOR_SOLICIT: | |
503 | /* can be followed by options */ | |
504 | break; | |
505 | ||
506 | case ND_NEIGHBOR_ADVERT: | |
507 | na = (struct nd_neighbor_advert*)h; | |
508 | LEPRINTF("NA=%08x ", ntohl(na->nd_na_flags_reserved)); | |
509 | /* can be followed by options */ | |
510 | break; | |
511 | ||
512 | case ND_REDIRECT: | |
513 | re = (struct nd_redirect*)h; | |
514 | inet_ntop(AF_INET6, &re->nd_rd_target, tmp, sizeof(tmp)); | |
515 | LEPRINTF("TARGET=%s ", tmp); | |
516 | inet_ntop(AF_INET6, &re->nd_rd_dst, tmp, sizeof(tmp)); | |
517 | LEPRINTF("GATEWAY=%s ", tmp); | |
518 | /* can be followed by options */ | |
519 | break; | |
520 | ||
521 | case ICMP6_DST_UNREACH: | |
522 | /* CODE shows the type, no extra parameters available in ipv6 */ | |
523 | break; | |
524 | ||
525 | case ICMP6_PACKET_TOO_BIG: | |
526 | LEPRINTF("MTU=%u ", ntohl(h->icmp6_mtu)); | |
527 | break; | |
528 | ||
529 | case ICMP6_TIME_EXCEEDED: | |
530 | /* CODE shows the type (0 = hop limit, 1 = reassembly timed out) */ | |
531 | break; | |
532 | ||
533 | case ICMP6_PARAM_PROB: | |
534 | switch (ntohl(h->icmp6_pptr)) { | |
535 | case ICMP6_PARAMPROB_HEADER: | |
536 | LEPRINTF("PARAMETER=HEADER "); /* erroneous header */ | |
537 | break; | |
538 | case ICMP6_PARAMPROB_NEXTHEADER: | |
539 | LEPRINTF("PARAMETER=NEXTHEADER "); /* bad next-header field */ | |
540 | break; | |
541 | case ICMP6_PARAMPROB_OPTION: | |
542 | LEPRINTF("PARAMETER=OPTION "); /* bad ipv6 option (hop/dst header?) */ | |
543 | break; | |
544 | default: | |
545 | LEPRINTF("PARAMETER=%u ", ntohl(h->icmp6_pptr)); /* unknown */ | |
546 | break; | |
547 | } | |
548 | break; | |
549 | } | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | static int | |
555 | check_ip6ext(struct log_entry *le, struct ip6_ext *exthdr, int payload_len) | |
556 | { | |
557 | if (payload_len < sizeof(*exthdr) || | |
558 | payload_len < exthdr->ip6e_len) | |
559 | { | |
560 | LEPRINTF("LEN=%d ", payload_len); | |
561 | LEPRINTF("INVALID=LEN "); | |
562 | return -1; | |
563 | } | |
564 | return 0; | |
565 | } | |
566 | ||
567 | static int | |
568 | print_nexthdr(struct log_entry *le, char *hdr, int payload_len, u_int8_t proto) | |
569 | { | |
570 | while (1) { | |
571 | if (print_ipproto(le, hdr, payload_len, proto) == 0) | |
572 | return 0; | |
573 | ||
574 | struct ip6_ext *exthdr = (struct ip6_ext*)hdr; | |
575 | ||
576 | switch (proto) { | |
577 | /* protocols (these return) */ | |
578 | case IPPROTO_ICMPV6: | |
579 | LEPRINTF("PROTO=ICMPV6 "); | |
580 | if (check_ip6ext(le, exthdr, payload_len) < 0) | |
581 | return -1; | |
582 | if (print_icmp6(le, (struct icmp6_hdr*)(hdr + exthdr->ip6e_len), | |
583 | payload_len - exthdr->ip6e_len) < 0) | |
584 | { | |
585 | return -1; | |
586 | } | |
587 | return 0; | |
588 | ||
589 | /* extension headers (these break to keep iterating) */ | |
590 | case IPPROTO_ROUTING: | |
591 | if (check_ip6ext(le, exthdr, payload_len) < 0) | |
592 | return -1; | |
593 | if (print_routing(le, (struct ip6_rthdr*)hdr, payload_len) < 0) | |
594 | return -1; | |
595 | break; | |
596 | case IPPROTO_FRAGMENT: | |
597 | if (check_ip6ext(le, exthdr, payload_len) < 0) | |
598 | return -1; | |
599 | if (print_fragment(le, (struct ip6_frag*)hdr, payload_len) < 0) | |
600 | return -1; | |
601 | break; | |
602 | case IPPROTO_HOPOPTS: | |
603 | LEPRINTF("NEXTHDR=HOPOPTS "); | |
604 | if (check_ip6ext(le, exthdr, payload_len) < 0) | |
605 | return -1; | |
606 | /* do we want to print these? */ | |
607 | break; | |
608 | case IPPROTO_DSTOPTS: | |
609 | LEPRINTF("NEXTHDR=DSTOPTS "); | |
610 | if (check_ip6ext(le, exthdr, payload_len) < 0) | |
611 | return -1; | |
612 | /* do we want to print these? */ | |
613 | break; | |
614 | case IPPROTO_MH: | |
615 | LEPRINTF("NEXTHDR=MH "); | |
616 | if (check_ip6ext(le, exthdr, payload_len) < 0) | |
617 | return -1; | |
618 | break; | |
619 | ||
620 | /* unknown protocol */ | |
621 | default: | |
622 | LEPRINTF("PROTO=%u ", proto); | |
623 | return 0; /* bail */ | |
624 | } | |
625 | /* next header: */ | |
626 | if (check_ip6ext(le, exthdr, payload_len) < 0) | |
627 | return -1; | |
628 | hdr += exthdr->ip6e_len; | |
629 | payload_len -= exthdr->ip6e_len; | |
630 | } | |
631 | } | |
632 | ||
633 | static int | |
634 | print_ip6hdr(struct log_entry *le, char * payload, int payload_len) | |
635 | { | |
636 | if (payload_len < sizeof(struct ip6_hdr)) { | |
637 | LEPRINTF("LEN=%d ", payload_len); | |
638 | LEPRINTF("INVALID=LEN "); | |
639 | return -1; | |
640 | } | |
641 | ||
642 | struct ip6_hdr *h = (struct ip6_hdr*)payload; | |
643 | ||
644 | char tmp[INET6_ADDRSTRLEN]; | |
645 | inet_ntop(AF_INET6, &h->ip6_src, tmp, sizeof(tmp)); | |
646 | LEPRINTF("SRC=%s ", tmp); | |
647 | inet_ntop(AF_INET6, &h->ip6_dst, tmp, sizeof(tmp)); | |
648 | LEPRINTF("DST=%s ", tmp); | |
649 | ||
650 | LEPRINTF("LEN=%u ", ntohs(h->ip6_plen)); | |
651 | ||
652 | u_int32_t flow = ntohl(h->ip6_flow); | |
653 | LEPRINTF("TC=%d FLOWLBL=%d ", (flow>>20)&0xFF, flow&0xFFFFF); | |
654 | ||
655 | LEPRINTF("HOPLIMIT=%d ", h->ip6_hlim); | |
656 | ||
657 | return print_nexthdr(le, (char *)(h+1), payload_len - sizeof(*h), h->ip6_nxt); | |
658 | } | |
659 | ||
ba0b3a0a | 660 | // ebtables -I FORWARD --nflog --nflog-group 0 |
7bb6e8dd | 661 | static int |
ba0b3a0a DM |
662 | print_arp(struct log_entry *le, struct ether_arp *h, int payload_len) |
663 | { | |
664 | if (payload_len < sizeof(struct ether_arp)) { | |
665 | LEPRINTF("LEN=%d ", payload_len); | |
666 | LEPRINTF("INVALID=LEN "); | |
667 | return -1; | |
668 | } | |
669 | ||
670 | LEPRINTF("SRC=%u.%u.%u.%u ", h->arp_spa[0], h->arp_spa[1], | |
671 | h->arp_spa[2], h->arp_spa[3]); | |
672 | ||
673 | LEPRINTF("DST=%u.%u.%u.%u ", h->arp_tpa[0], h->arp_tpa[1], | |
674 | h->arp_tpa[2], h->arp_tpa[3]); | |
675 | ||
676 | LEPRINTF("PROTO=ARP "); | |
677 | ||
678 | unsigned short code = ntohs(h->arp_op); | |
679 | switch (code) { | |
680 | case ARPOP_REQUEST: | |
681 | LEPRINTF("REQUEST "); | |
682 | break; | |
683 | case ARPOP_REPLY: | |
7bb6e8dd DM |
684 | LEPRINTF("REPLY MAC=%02x:%02x:%02x:%02x:%02x:%02x ", |
685 | h->arp_sha[0], h->arp_sha[1], h->arp_sha[2], | |
ba0b3a0a DM |
686 | h->arp_sha[3], h->arp_sha[4], h->arp_sha[5]); |
687 | break; | |
688 | case ARPOP_NAK: | |
689 | LEPRINTF("NAK "); | |
690 | break; | |
691 | default: | |
692 | LEPRINTF("CODE=%u ", code); | |
693 | } | |
694 | ||
695 | ||
696 | // LEPRINTF("HTYPE=%u ", ntohs(h->arp_hrd)); | |
697 | ||
698 | // LEPRINTF("PTYPE=%u ", ntohs(h->arp_pro)); | |
699 | ||
700 | return 0; | |
701 | } | |
702 | ||
703 | ||
704 | static int print_pkt(struct log_entry *le, struct nflog_data *ldata, u_int8_t family) | |
705 | { | |
706 | u_int32_t mark = nflog_get_nfmark(ldata); | |
707 | u_int32_t indev = nflog_get_indev(ldata); | |
708 | u_int32_t outdev = nflog_get_outdev(ldata); | |
709 | u_int32_t physindev = nflog_get_physindev(ldata); | |
710 | u_int32_t physoutdev = nflog_get_physoutdev(ldata); | |
711 | ||
712 | char *prefix = nflog_get_prefix(ldata); | |
713 | char *payload; | |
714 | char devname[256]; | |
7bb6e8dd | 715 | |
782c4cde DM |
716 | guint32 vmid = 0; |
717 | ||
718 | guint8 log_level = 6; // info | |
719 | ||
720 | char *chain_name = "-"; | |
721 | ||
722 | if (prefix != NULL) { | |
723 | // Note: parse ":$vmid:$loglevel:$chain: $msg" | |
724 | if (prefix[0] == ':') { | |
725 | char *p = prefix + 1; | |
726 | guint32 tmpid = 0; | |
727 | while(*p >= '0' && *p <= '9') { tmpid *= 10; tmpid += *p - '0'; p++; } | |
728 | ||
729 | if ((*p == ':') && | |
730 | (p[1] >= '0' && p[1] <= '7') && | |
731 | (p[2] == ':')) { | |
732 | ||
733 | guint8 tmp_level = p[1] - '0'; // store for later use | |
734 | char *chain_start = p + 3; // store for later use | |
735 | p = chain_start; | |
736 | while (*p && *p != ':' && *p != ' ') p++; | |
737 | int len = p - chain_start; | |
738 | ||
739 | if (*p == ':' && p[1] == ' ' && len && (len <= MAX_CHAIN_LEN)) { | |
740 | // parsing successful | |
741 | ||
742 | *p = 0; // terminate string | |
743 | ||
744 | vmid = tmpid; | |
745 | log_level = tmp_level; | |
746 | chain_name = chain_start; | |
747 | prefix = p + 2; // the rest | |
7bb6e8dd | 748 | } |
782c4cde DM |
749 | } |
750 | } | |
751 | } | |
752 | ||
753 | LEPRINTF("%d ", vmid); | |
754 | ||
755 | LEPRINTF("%d ", log_level); | |
756 | ||
757 | LEPRINTF("%s ", chain_name); | |
758 | ||
ba0b3a0a | 759 | struct timeval ts; |
2388cab1 WB |
760 | if (nflog_get_timestamp(ldata, &ts) == 0) { |
761 | LEPRINTTIME(ts.tv_sec); | |
762 | } else { | |
763 | LEPRINTTIME(time(NULL)); | |
764 | } | |
ba0b3a0a | 765 | |
ba0b3a0a DM |
766 | if (prefix != NULL) { |
767 | LEPRINTF("%s", prefix); | |
768 | } | |
7bb6e8dd DM |
769 | |
770 | if (indev > 0) { | |
e7ceb650 | 771 | if (nlif_index2name(nlifh, indev, devname) != -1) { |
7bb6e8dd | 772 | LEPRINTF("IN=%s ", devname); |
e7ceb650 | 773 | } else { |
7bb6e8dd | 774 | LEPRINTF("IN=%u ", indev); |
e7ceb650 | 775 | } |
ba0b3a0a DM |
776 | } |
777 | ||
e7ceb650 DM |
778 | if (outdev > 0) { |
779 | if (nlif_index2name(nlifh, outdev, devname) != -1) { | |
780 | LEPRINTF("OUT=%s ", devname); | |
781 | } else { | |
782 | LEPRINTF("OUT=%u ", outdev); | |
783 | } | |
ba0b3a0a DM |
784 | } |
785 | ||
7bb6e8dd | 786 | if (physindev > 0) { |
e7ceb650 DM |
787 | if (nlif_index2name(nlifh, physindev, devname) != -1) { |
788 | LEPRINTF("PHYSIN=%s ", devname); | |
789 | } else { | |
790 | LEPRINTF("PHYSIN=%u ", physindev); | |
791 | } | |
ba0b3a0a | 792 | } |
7bb6e8dd | 793 | |
e7ceb650 DM |
794 | if (physoutdev > 0) { |
795 | if (nlif_index2name(nlifh, physoutdev, devname) != -1) { | |
796 | LEPRINTF("PHYSOUT=%s ", devname); | |
797 | } else { | |
798 | LEPRINTF("PHYSOUT=%u ", physoutdev); | |
799 | } | |
ba0b3a0a DM |
800 | } |
801 | ||
802 | int payload_len = nflog_get_payload(ldata, &payload); | |
803 | ||
804 | int hwhdrlen = nflog_get_msg_packet_hwhdrlen(ldata); | |
805 | if (hwhdrlen > 0) { | |
806 | unsigned char *hwhdr = (unsigned char *)nflog_get_msg_packet_hwhdr(ldata); | |
807 | if (hwhdr != NULL) { | |
808 | int i; | |
809 | LEPRINTF("MAC="); | |
810 | for (i = 0; i < hwhdrlen; i++) { | |
811 | LEPRINTF("%02x", hwhdr[i]); | |
812 | if (i < (hwhdrlen -1 )) LEPRINTF(":"); | |
813 | } | |
814 | LEPRINTF(" "); | |
815 | } | |
816 | } | |
817 | ||
818 | u_int16_t hw_protocol = 0; | |
819 | struct nfulnl_msg_packet_hdr *ph = NULL; | |
820 | ||
821 | switch (family) { | |
7bb6e8dd | 822 | case AF_INET: |
ba0b3a0a DM |
823 | print_iphdr(le, payload, payload_len); |
824 | break; | |
825 | case AF_INET6: | |
826 | print_ip6hdr(le, payload, payload_len); | |
827 | break; | |
828 | case AF_BRIDGE: | |
829 | ph = nflog_get_msg_packet_hdr(ldata); | |
830 | if (ph) hw_protocol = ntohs(ph->hw_protocol); | |
831 | ||
832 | switch (hw_protocol) { | |
833 | case ETH_P_IP: | |
834 | print_iphdr(le, payload, payload_len); | |
835 | break; | |
836 | case ETH_P_IPV6: | |
837 | print_ip6hdr(le, payload, payload_len); | |
838 | break; | |
839 | case ETH_P_ARP: | |
840 | print_arp(le, (struct ether_arp *)payload, payload_len); | |
841 | break; | |
842 | } | |
843 | break; | |
844 | } | |
845 | ||
846 | if (mark) LEPRINTF("mark=%u ", mark); | |
847 | ||
848 | ||
849 | return 0; | |
850 | ||
851 | } | |
852 | ||
7bb6e8dd | 853 | static int |
ba0b3a0a DM |
854 | nflog_cb(struct nflog_g_handle *gh, struct nfgenmsg *nfmsg, |
855 | struct nflog_data *nfa, void *data) | |
856 | { | |
857 | struct log_entry *le = g_new0(struct log_entry, 1); | |
7bb6e8dd | 858 | |
ba0b3a0a DM |
859 | print_pkt(le, nfa, nfmsg->nfgen_family); |
860 | ||
861 | LEPRINTF("\n"); // add newline | |
862 | ||
863 | queue_log_entry(le); | |
864 | ||
865 | return 0; | |
866 | } | |
867 | ||
868 | static gboolean | |
869 | nflog_read_cb(GIOChannel *source, | |
870 | GIOCondition condition, | |
871 | gpointer data) | |
872 | { | |
873 | int rv = 0; | |
874 | gchar buf[8192]; | |
875 | ||
876 | int fd = g_io_channel_unix_get_fd(source); | |
7bb6e8dd | 877 | |
ba0b3a0a DM |
878 | if ((rv = recv(fd, buf, sizeof(buf), 0)) && rv >= 0) { |
879 | nflog_handle_packet(logh, buf, rv); | |
880 | } | |
881 | ||
882 | return TRUE; | |
883 | } | |
884 | ||
885 | static gboolean | |
886 | nlif_read_cb(GIOChannel *source, | |
887 | GIOCondition condition, | |
888 | gpointer data) | |
889 | { | |
9da3465c DM |
890 | static int last_res = 0; |
891 | int res; | |
892 | ||
893 | if ((res = nlif_catch(nlifh)) < 0) { | |
894 | if (last_res == 0) { // only report once | |
895 | log_status_message(3, "nlif_catch failed (res = %d)", res); | |
896 | } | |
897 | last_res = res; | |
898 | } else { | |
899 | last_res = 0; | |
900 | } | |
901 | ||
7bb6e8dd | 902 | return TRUE; |
ba0b3a0a DM |
903 | } |
904 | ||
ba0b3a0a | 905 | static gboolean |
985fd74e DM |
906 | signal_read_cb(GIOChannel *source, |
907 | GIOCondition condition, | |
908 | gpointer data) | |
ba0b3a0a | 909 | { |
985fd74e DM |
910 | int rv = 0; |
911 | struct signalfd_siginfo si; | |
ba0b3a0a | 912 | |
985fd74e | 913 | int fd = g_io_channel_unix_get_fd(source); |
ba0b3a0a | 914 | |
985fd74e DM |
915 | if ((rv = read(fd, &si, sizeof(si))) && rv >= 0) { |
916 | terminate_threads = TRUE; | |
917 | log_status_message(5, "received terminate request (signal)"); | |
918 | g_main_loop_quit(main_loop); | |
919 | } | |
7bb6e8dd | 920 | |
ba0b3a0a DM |
921 | return TRUE; |
922 | } | |
7bb6e8dd | 923 | |
fdf943fe DL |
924 | static int |
925 | nfct_cb(const struct nlmsghdr *nlh, | |
926 | enum nf_conntrack_msg_type type, | |
927 | struct nf_conntrack *ct, | |
928 | void *data) | |
929 | { | |
930 | struct log_entry *le = g_new0(struct log_entry, 1); | |
931 | int len = nfct_snprintf(&le->buf[le->len], LE_MAX - le->len, | |
932 | ct, type, NFCT_O_DEFAULT, | |
933 | NFCT_OF_SHOW_LAYER3|NFCT_OF_TIMESTAMP); | |
934 | le->len += len; | |
935 | ||
936 | if (le->len == LE_MAX) { | |
937 | le->buf[le->len-1] = '\n'; | |
938 | } else { // le->len < LE_MAX | |
939 | le->buf[le->len++] = '\n'; | |
940 | } | |
941 | ||
942 | queue_log_entry(le); | |
943 | ||
944 | return NFCT_CB_STOP; | |
945 | } | |
946 | ||
947 | static gboolean | |
948 | nfct_read_cb(GIOChannel *source, | |
949 | GIOCondition condition, | |
950 | gpointer data) | |
951 | { | |
952 | int res; | |
953 | if ((res = nfct_catch(nfcth)) < 0) { | |
954 | log_status_message(3, "error catching nfct"); | |
955 | return FALSE; | |
956 | } | |
957 | return TRUE; | |
958 | } | |
959 | ||
ba0b3a0a DM |
960 | int |
961 | main(int argc, char *argv[]) | |
962 | { | |
963 | int lockfd = -1; | |
985fd74e DM |
964 | int sigfd = -1; |
965 | ||
ba0b3a0a DM |
966 | gboolean wrote_pidfile = FALSE; |
967 | ||
dc4b58b5 | 968 | openlog("pvefw-logger", LOG_CONS|LOG_PID, LOG_DAEMON); |
9da3465c | 969 | |
84786ec0 DM |
970 | GOptionContext *context; |
971 | ||
972 | GOptionEntry entries[] = { | |
973 | { "debug", 'd', 0, G_OPTION_ARG_NONE, &debug, "Turn on debug messages", NULL }, | |
974 | { "foreground", 'f', 0, G_OPTION_ARG_NONE, &foreground, "Do not daemonize server", NULL }, | |
fdf943fe | 975 | { "conntrack", 0, 0, G_OPTION_ARG_NONE, &conntrack, "Add conntrack logging", NULL }, |
84786ec0 DM |
976 | { NULL }, |
977 | }; | |
978 | ||
979 | context = g_option_context_new(""); | |
980 | g_option_context_add_main_entries (context, entries, NULL); | |
981 | ||
982 | GError *err = NULL; | |
983 | if (!g_option_context_parse (context, &argc, &argv, &err)) { | |
984 | fprintf(stderr, "error: %s\n", err->message); | |
985 | fprintf(stderr, "%s", g_option_context_get_help(context, FALSE, NULL)); | |
986 | g_error_free (err); | |
987 | exit(-1); | |
988 | } | |
989 | ||
990 | if (optind < argc) { | |
991 | fprintf(stderr, "error: too many arguments\n"); | |
992 | fprintf(stderr, "%s", g_option_context_get_help(context, FALSE, NULL)); | |
993 | exit(-1); | |
994 | } | |
995 | ||
996 | g_option_context_free(context); | |
997 | ||
fdf943fe DL |
998 | if (!conntrack) { |
999 | int log_nf_conntrackfd = open(LOG_CONNTRACK_FILE, O_RDONLY); | |
1000 | if (log_nf_conntrackfd == -1) { | |
1001 | if (errno != ENOENT) { | |
1002 | fprintf(stderr, "error: failed to open "LOG_CONNTRACK_FILE": %s\n", strerror(errno)); | |
1003 | } | |
1004 | } else { | |
1005 | char c = '0'; | |
1006 | ssize_t bytes = read(log_nf_conntrackfd, &c, sizeof(c)); | |
1007 | if (bytes < 0) { | |
1008 | fprintf(stderr, "error: failed to read value in log_nf_conntrack: %s\n", strerror(errno)); | |
1009 | } else { | |
1010 | conntrack = (c == '1'); | |
1011 | } | |
1012 | } | |
1013 | } | |
1014 | ||
84786ec0 DM |
1015 | if (debug) foreground = TRUE; |
1016 | ||
ba0b3a0a | 1017 | if ((lockfd = open(LOCKFILE, O_RDWR|O_CREAT|O_APPEND, 0644)) == -1) { |
84786ec0 | 1018 | fprintf(stderr, "unable to create lock '%s': %s\n", LOCKFILE, strerror (errno) ); |
ba0b3a0a DM |
1019 | exit(-1); |
1020 | } | |
1021 | ||
1022 | for (int i = 10; i >= 0; i--) { | |
1023 | if (flock(lockfd, LOCK_EX|LOCK_NB) != 0) { | |
1024 | if (!i) { | |
84786ec0 | 1025 | fprintf(stderr, "unable to aquire lock '%s': %s\n", LOCKFILE, strerror (errno)); |
ba0b3a0a DM |
1026 | exit(-1); |
1027 | } | |
1028 | if (i == 10) | |
1029 | fprintf(stderr, "unable to aquire lock '%s' - trying again.\n", LOCKFILE); | |
7bb6e8dd | 1030 | |
ba0b3a0a DM |
1031 | sleep(1); |
1032 | } | |
1033 | } | |
1034 | ||
1035 | if ((outfd = open(LOGFILE, O_WRONLY|O_CREAT|O_APPEND, 0644)) == -1) { | |
84786ec0 | 1036 | fprintf(stderr, "unable to open file '%s': %s\n", LOGFILE, strerror (errno)); |
ba0b3a0a DM |
1037 | exit(-1); |
1038 | } | |
1039 | ||
1040 | if ((logh = nflog_open()) == NULL) { | |
1041 | fprintf(stderr, "unable to open nflog\n"); | |
1042 | exit(-1); | |
1043 | } | |
1044 | ||
0dc6e638 | 1045 | if (nflog_bind_pf(logh, AF_INET) < 0) { |
ba0b3a0a DM |
1046 | fprintf(stderr, "nflog_bind_pf AF_INET failed\n"); |
1047 | exit(-1); | |
1048 | } | |
1049 | ||
1050 | #if 0 | |
1051 | if (!nflog_bind_pf(logh, AF_INET6) <= 0) { | |
1052 | fprintf(stderr, "nflog_bind_pf AF_INET6 failed\n"); | |
1053 | exit(-1); | |
1054 | } | |
1055 | #endif | |
7bb6e8dd | 1056 | |
0dc6e638 | 1057 | if (nflog_bind_pf(logh, AF_BRIDGE) < 0) { |
ba0b3a0a DM |
1058 | fprintf(stderr, "nflog_bind_pf AF_BRIDGE failed\n"); |
1059 | exit(-1); | |
1060 | } | |
1061 | ||
1062 | struct nflog_g_handle *qh = nflog_bind_group(logh, 0); | |
1063 | if (!qh) { | |
84786ec0 | 1064 | fprintf(stderr, "no nflog handle for group 0\n"); |
ba0b3a0a DM |
1065 | exit(-1); |
1066 | } | |
7bb6e8dd | 1067 | |
ba0b3a0a DM |
1068 | if (nflog_set_mode(qh, NFULNL_COPY_PACKET, 0xffff) < 0) { |
1069 | fprintf(stderr, "can't set packet copy mode\n"); | |
1070 | exit(-1); | |
1071 | } | |
1072 | ||
1073 | if ((nlifh = nlif_open()) == NULL) { | |
1074 | fprintf(stderr, "unable to open netlink interface handle\n"); | |
1075 | exit(-1); | |
1076 | } | |
1077 | ||
fdf943fe DL |
1078 | if (conntrack) { |
1079 | if ((nfcth = nfct_open(CONNTRACK, NF_NETLINK_CONNTRACK_NEW|NF_NETLINK_CONNTRACK_DESTROY)) == NULL) { | |
1080 | fprintf(stderr, "unable to open netfilter conntrack\n"); | |
1081 | exit(-1); | |
1082 | } | |
1083 | } | |
1084 | ||
985fd74e DM |
1085 | sigset_t mask; |
1086 | sigemptyset(&mask); | |
1087 | sigaddset(&mask, SIGINT); | |
1088 | sigaddset(&mask, SIGTERM); | |
1089 | ||
1090 | sigprocmask(SIG_BLOCK, &mask, NULL); | |
1091 | ||
1092 | if ((sigfd = signalfd(-1, &mask, SFD_NONBLOCK)) < 0) { | |
1093 | fprintf(stderr, "unable to open signalfd: %s\n", strerror (errno)); | |
1094 | exit(-1); | |
1095 | } | |
1096 | ||
ba0b3a0a DM |
1097 | if (!foreground) { |
1098 | pid_t cpid = fork(); | |
1099 | ||
1100 | if (cpid == -1) { | |
1101 | fprintf(stderr, "failed to daemonize program - %s\n", strerror (errno)); | |
1102 | exit(-1); | |
1103 | } else if (cpid) { | |
1104 | write_pidfile(cpid); | |
1105 | _exit(0); | |
1106 | } else { | |
1107 | int nullfd; | |
1108 | ||
1109 | if (chroot("/") != 0) fprintf(stderr, "chroot '/' failed - %s\n", strerror (errno)); | |
1110 | ||
1111 | if ((nullfd = open("/dev/null", O_RDWR, 0)) != -1) { | |
1112 | dup2(nullfd, 0); | |
1113 | dup2(nullfd, 1); | |
1114 | dup2(nullfd, 2); | |
1115 | if (nullfd > 2) | |
1116 | close (nullfd); | |
1117 | } | |
1118 | ||
1119 | setsid(); | |
1120 | } | |
1121 | } else { | |
1122 | write_pidfile(getpid()); | |
1123 | } | |
1124 | ||
1125 | wrote_pidfile = TRUE; | |
1126 | ||
1127 | nflog_callback_register(qh, &nflog_cb, logh); | |
1128 | ||
1129 | queue = g_async_queue_new_full(g_free); | |
1130 | ||
782c4cde | 1131 | log_status_message(5, "starting pvefw logger"); |
ba0b3a0a DM |
1132 | |
1133 | nlif_query(nlifh); | |
1134 | ||
1135 | GIOChannel *nlif_ch = g_io_channel_unix_new(nlif_fd(nlifh)); | |
1136 | ||
1137 | g_io_add_watch(nlif_ch, G_IO_IN, nlif_read_cb, NULL); | |
1138 | ||
1139 | int logfd = nflog_fd(logh); | |
1140 | GIOChannel *nflog_ch = g_io_channel_unix_new(logfd); | |
1141 | ||
1142 | g_io_add_watch(nflog_ch, G_IO_IN, nflog_read_cb, NULL); | |
1143 | ||
fdf943fe DL |
1144 | if (conntrack) { |
1145 | nfct_callback_register2(nfcth, NFCT_T_NEW|NFCT_T_DESTROY, &nfct_cb, NULL); | |
1146 | int nfctfd = nfct_fd(nfcth); | |
1147 | GIOChannel *nfct_ch = g_io_channel_unix_new(nfctfd); | |
1148 | g_io_add_watch(nfct_ch, G_IO_IN, nfct_read_cb, NULL); | |
1149 | } | |
1150 | ||
985fd74e | 1151 | GIOChannel *sig_ch = g_io_channel_unix_new(sigfd); |
985fd74e | 1152 | if (!g_io_add_watch(sig_ch, G_IO_IN, signal_read_cb, NULL)) { |
e2beb7aa | 1153 | exit(-1); |
985fd74e DM |
1154 | } |
1155 | ||
ba0b3a0a | 1156 | GThread *wthread = g_thread_new("log_writer_thread", log_writer_thread, NULL); |
7bb6e8dd | 1157 | |
ba0b3a0a | 1158 | main_loop = g_main_loop_new(NULL, TRUE); |
7bb6e8dd | 1159 | |
ba0b3a0a DM |
1160 | g_main_loop_run(main_loop); |
1161 | ||
782c4cde | 1162 | log_status_message(5, "stopping pvefw logger"); |
ba0b3a0a DM |
1163 | |
1164 | g_thread_join(wthread); | |
1165 | ||
1166 | close(outfd); | |
1167 | ||
fdf943fe DL |
1168 | if (conntrack) { |
1169 | nfct_callback_unregister2(nfcth); | |
1170 | nfct_close(nfcth); | |
1171 | } | |
1172 | ||
ba0b3a0a DM |
1173 | nflog_close(logh); |
1174 | ||
1175 | if (wrote_pidfile) | |
1176 | unlink(PIDFILE); | |
1177 | ||
1178 | exit(0); | |
1179 | } |