2 Copyright (C) Slava Astashonok <sla@0n.ru>
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License.
7 $Id: fprobe-ulog.c,v 1.1.2.4 2005/01/30 09:06:19 sla Exp $
9 Sapan Bhatia <sapanb@cs.princeton.edu>
11 7/11/2007 Added data collection (-f) functionality, xid support in the header and log file
14 15/11/2007 Added check to make sure fprobe doesn't overflow the disk. Also added a test facility.
20 /* stdout, stderr, freopen() */
26 /* getopt(), alarm(), getpid(), sedsid(), chdir() */
39 #include <libipulog/libipulog.h>
42 struct ipulog_handle {
45 struct sockaddr_nl local;
46 struct sockaddr_nl peer;
47 struct nlmsghdr* last_nlhdr;
50 /* inet_*() (Linux, FreeBSD, Solaris), getpid() */
51 #include <sys/types.h>
52 #include <netinet/in_systm.h>
53 #include <sys/socket.h>
54 #include <netinet/in.h>
55 #include <arpa/inet.h>
56 #include <netinet/ip.h>
57 #include <netinet/tcp.h>
58 #include <netinet/udp.h>
59 #include <netinet/ip_icmp.h>
62 #include <sys/param.h>
87 #include <sys/select.h>
93 #include <fprobe-ulog.h>
95 #include <my_getopt.h>
100 #define PIDFILE "/var/log/fprobe-ulog.pid"
101 #define LAST_EPOCH_FILE "/var/log/fprobe_last_epoch"
102 #define MAX_EPOCH_SIZE sizeof("32767")
103 #define STD_NETFLOW_PDU
133 static struct getopt_parms parms[] = {
134 {'a', MY_GETOPT_ARG_REQUIRED, 0, 0},
135 {'B', MY_GETOPT_ARG_REQUIRED, 0, 0},
136 {'b', MY_GETOPT_ARG_REQUIRED, 0, 0},
137 {'c', MY_GETOPT_ARG_REQUIRED, 0, 0},
138 {'d', MY_GETOPT_ARG_REQUIRED, 0, 0},
139 {'D', MY_GETOPT_ARG_REQUIRED, 0, 0},
140 {'e', MY_GETOPT_ARG_REQUIRED, 0, 0},
141 {'E', MY_GETOPT_ARG_REQUIRED, 0, 0},
142 {'f', MY_GETOPT_ARG_REQUIRED, 0, 0},
143 {'g', MY_GETOPT_ARG_REQUIRED, 0, 0},
145 {'l', MY_GETOPT_ARG_REQUIRED, 0, 0},
146 {'m', MY_GETOPT_ARG_REQUIRED, 0, 0},
148 {'n', MY_GETOPT_ARG_REQUIRED, 0, 0},
149 {'q', MY_GETOPT_ARG_REQUIRED, 0, 0},
150 {'r', MY_GETOPT_ARG_REQUIRED, 0, 0},
151 {'s', MY_GETOPT_ARG_REQUIRED, 0, 0},
152 {'t', MY_GETOPT_ARG_REQUIRED, 0, 0},
153 {'T', MY_GETOPT_ARG_REQUIRED, 0, 0},
154 {'U', MY_GETOPT_ARG_REQUIRED, 0, 0},
155 {'u', MY_GETOPT_ARG_REQUIRED, 0, 0},
156 {'v', MY_GETOPT_ARG_REQUIRED, 0, 0},
157 {'X', MY_GETOPT_ARG_REQUIRED, 0, 0},
162 extern int optind, opterr, optopt;
165 extern struct NetFlow NetFlow1;
166 extern struct NetFlow NetFlow5;
167 extern struct NetFlow NetFlow7;
169 #define START_DATA_FD -5
170 #define mark_is_tos parms[Mflag].count
171 static unsigned scan_interval = 5;
172 static unsigned int min_free = 0;
173 static int frag_lifetime = 30;
174 static int inactive_lifetime = 60;
175 static int active_lifetime = 300;
176 static int sockbufsize;
177 #define BULK_QUANTITY_MAX (unsigned)(mem_index_t)(-1)
178 #if (MEM_BITS == 0) || (MEM_BITS == 16)
179 #define BULK_QUANTITY 10000
181 #define BULK_QUANTITY 200
184 static unsigned epoch_length=60, log_epochs=1;
185 static unsigned cur_epoch=0,prev_uptime=0,last_peak=0;
187 static unsigned bulk_quantity = BULK_QUANTITY;
188 static unsigned pending_queue_length = 100;
189 static struct NetFlow *netflow = &NetFlow5;
190 static unsigned verbosity = 6;
191 static unsigned log_dest = MY_LOG_SYSLOG;
192 static struct Time start_time;
193 static long start_time_offset;
196 extern unsigned total_elements;
197 extern unsigned free_elements;
198 extern unsigned total_memory;
199 #if ((DEBUG) & DEBUG_I)
200 static unsigned emit_pkts, emit_queue;
201 static uint64_t size_total;
202 static unsigned pkts_total, pkts_total_fragmented;
203 static unsigned pkts_ignored, pkts_lost_capture, pkts_lost_unpending;
204 static unsigned pkts_pending, pkts_pending_done;
205 static unsigned pending_queue_trace, pending_queue_trace_candidate;
206 static unsigned flows_total, flows_fragmented;
208 static unsigned emit_count;
209 static uint32_t emit_sequence;
210 static unsigned emit_rate_bytes, emit_rate_delay;
211 static struct Time emit_time;
212 static uint8_t emit_packet[NETFLOW_MAX_PACKET];
213 static pthread_t thid;
214 static sigset_t sig_mask;
215 static struct sched_param schedp;
216 static int sched_min, sched_max;
217 static int npeers, npeers_rot;
218 static struct peer *peers;
221 static struct Flow *flows[1 << HASH_BITS];
222 static pthread_mutex_t flows_mutex[1 << HASH_BITS];
224 static pthread_mutex_t unpending_mutex = PTHREAD_MUTEX_INITIALIZER;
225 static pthread_cond_t unpending_cond = PTHREAD_COND_INITIALIZER;
227 static pthread_mutex_t scan_mutex = PTHREAD_MUTEX_INITIALIZER;
228 static pthread_cond_t scan_cond = PTHREAD_COND_INITIALIZER;
229 static struct Flow *pending_head, *pending_tail;
230 static struct Flow *scan_frag_dreg;
232 static pthread_mutex_t emit_mutex = PTHREAD_MUTEX_INITIALIZER;
233 static pthread_cond_t emit_cond = PTHREAD_COND_INITIALIZER;
234 static struct Flow *flows_emit;
236 static char ident[256] = "fprobe-ulog";
237 static FILE *pidfile;
238 static char *pidfilepath;
241 static int emit_timeout = EMIT_TIMEOUT, unpending_timeout = UNPENDING_TIMEOUT;
242 static struct ipulog_handle *ulog_handle;
243 static uint32_t ulog_gmask = 1;
244 static char *cap_buf;
245 static int nsnmp_rules;
246 static struct snmp_rule *snmp_rules;
247 static struct passwd *pw = 0;
252 "fprobe-ulog: a NetFlow probe. Version %s\n"
253 "Usage: fprobe-ulog [options] remote:port[/[local][/type]] ...\n"
255 "-h\t\tDisplay this help\n"
256 "-U <mask>\tULOG group bitwise mask [1]\n"
257 "-s <seconds>\tHow often scan for expired flows [5]\n"
258 "-g <seconds>\tFragmented flow lifetime [30]\n"
259 "-e <seconds>\tActive flow lifetime (active timer) [300]\n"
260 "-f <filename>\tLog flow data in a file\n"
261 "-G <graduation period>\tRotate logs on an 0-hourly, 1-daily basis\n"
262 "-n <version>\tNetFlow version for use (1, 5 or 7) [5]\n"
263 "-a <address>\tUse <address> as source for NetFlow flow\n"
264 "-X <rules>\tInterface name to SNMP-index conversion rules\n"
265 "-M\t\tUse netfilter mark value as ToS flag\n"
266 "-b <flows>\tMemory bulk size (1..%u) [%u]\n"
267 "-m <kilobytes>\tMemory limit (0=no limit) [0]\n"
268 "-q <flows>\tPending queue length [100]\n"
269 "-B <kilobytes>\tKernel capture buffer size [0]\n"
270 "-r <priority>\tReal-time priority (0=disabled, %d..%d) [0]\n"
271 "-t <B:N>\tProduce <N> nanosecond delay after each <B> bytes sent [0:0]\n"
272 "-c <directory>\tDirectory to chroot to\n"
273 "-u <user>\tUser to run as\n"
274 "-v <level>\tMaximum log level (0=EMERG, ..., 6=INFO, 7=DEBUG) [6]\n"
275 "-l <[dst][:id]>\tLog destination and log/pidfile idetifier [1]\n"
276 "-y <remote:port>\tAddress of the NetFlow collector\n"
277 "-f <writable file>\tFile to write data into\n"
278 "-T <n>\tRotate log file every n epochs\n"
279 "-W <n>\tSet current epoch to n. Useful when restarting fprobe\n"
280 "-E <[1..60]>\tSize of an epoch in minutes\n"
281 "-D <number of blocks>\tNumber of disk blocks to preserve as free space\n"
283 VERSION, BULK_QUANTITY_MAX, bulk_quantity, sched_min, sched_max);
287 #if ((DEBUG) & DEBUG_I)
290 my_log(LOG_DEBUG, "I: received:%d/%d (%lld) pending:%d/%d",
291 pkts_total, pkts_total_fragmented, size_total,
292 pkts_pending - pkts_pending_done, pending_queue_trace);
293 my_log(LOG_DEBUG, "I: ignored:%d lost:%d+%d",
294 pkts_ignored, pkts_lost_capture, pkts_lost_unpending);
295 my_log(LOG_DEBUG, "I: cache:%d/%d emit:%d/%d/%d",
296 flows_total, flows_fragmented, emit_sequence, emit_pkts, emit_queue);
297 my_log(LOG_DEBUG, "I: memory:%d/%d (%d)",
298 total_elements, free_elements, total_memory);
302 void sighandler(int sig)
306 sigs |= SIGTERM_MASK;
308 #if ((DEBUG) & DEBUG_I)
310 sigs |= SIGUSR1_MASK;
316 void gettime(struct Time *now)
322 now->usec = t.tv_usec;
326 inline time_t cmpMtime(struct Time *t1, struct Time *t2)
328 return (t1->sec - t2->sec)/60;
331 inline time_t cmpmtime(struct Time *t1, struct Time *t2)
333 return (t1->sec - t2->sec) * 1000 + (t1->usec - t2->usec) / 1000;
336 /* Uptime in miliseconds */
337 uint32_t getuptime(struct Time *t)
339 /* Maximum uptime is about 49/2 days */
340 return cmpmtime(t, &start_time);
343 /* Uptime in minutes */
344 uint32_t getuptime_minutes(struct Time *t)
346 /* Maximum uptime is about 49/2 days */
347 return cmpMtime(t, &start_time);
350 hash_t hash_flow(struct Flow *flow)
352 if (flow->flags & FLOW_FRAG) return hash(flow, sizeof(struct Flow_F));
353 else return hash(flow, sizeof(struct Flow_TL));
356 uint16_t snmp_index(char *name) {
359 if (!*name) return 0;
361 for (i = 0; (int) i < nsnmp_rules; i++) {
362 if (strncmp(snmp_rules[i].basename, name, snmp_rules[i].len)) continue;
363 return atoi(&name[snmp_rules[i].len]) + snmp_rules[i].base;
366 if ((i = if_nametoindex(name))) return i;
371 inline void copy_flow(struct Flow *src, struct Flow *dst)
379 dst->proto = src->proto;
380 dst->tcp_flags = src->tcp_flags;
384 dst->pkts = src->pkts;
385 dst->size = src->size;
386 dst->sizeF = src->sizeF;
387 dst->sizeP = src->sizeP;
388 dst->ctime = src->ctime;
389 dst->mtime = src->mtime;
390 dst->flags = src->flags;
393 void read_cur_epoch() {
395 /* Reset to -1 in case the read fails */
397 fd = open(LAST_EPOCH_FILE, O_RDONLY);
399 char snum[MAX_EPOCH_SIZE];
401 len = read(fd, snum, MAX_EPOCH_SIZE-1);
404 sscanf(snum,"%d",&cur_epoch);
405 cur_epoch++; /* Let's not stone the last epoch */
413 /* Dumps the current epoch in a file to cope with
414 * reboots and killings of fprobe */
416 void update_cur_epoch_file(int n) {
418 char snum[MAX_EPOCH_SIZE];
419 len=snprintf(snum, MAX_EPOCH_SIZE-1,"%d", n);
420 fd = open(LAST_EPOCH_FILE, O_RDWR|O_CREAT|O_TRUNC);
422 my_log(LOG_ERR, "open() failed: %s.The next restart will resume logging from epoch id 0.",LAST_EPOCH_FILE);
425 write(fd, snum, len);
429 /* Get the file descriptor corresponding to the current file.
430 * The kludgy implementation is to abstract away the 'current
431 * file descriptor', which may also be a socket.
434 unsigned get_data_file_fd(char *fname, int cur_fd) {
438 struct statfs statfs;
441 /* We check if the amount of space left on the disk < some threshold and start reusing logs, or bail out if that
442 * doesn't solve the problem */
444 cur_uptime = getuptime_minutes(&now);
446 if (cur_fd != START_DATA_FD) {
447 if (fstatfs(cur_fd, &statfs) == -1) {
448 my_log(LOG_ERR, "PANIC! Can't stat disk to calculate free blocks");
451 if (min_free && (statfs.f_bavail < min_free)
452 && (cur_epoch==last_peak))
454 my_log(LOG_INFO, "Disk almost full (%u free blocks). I'm going to drop data. Max epochs = %d\n",statfs.f_bavail,cur_epoch);
459 assume that we can reclaim space by overwriting our own files
460 and that the difference in size will not fill the disk - sapan
465 /* If epoch length has been exceeded,
466 * or we're starting up
467 * or we're going back to the first epoch */
468 if (((cur_uptime - prev_uptime) > epoch_length) || (cur_fd < 0) || (cur_epoch==-1)) {
469 char nextname[MAX_PATH_LEN];
471 prev_uptime = cur_uptime;
472 cur_epoch = (cur_epoch + 1) % log_epochs;
473 if (cur_epoch>last_peak) last_peak = cur_epoch;
476 snprintf(nextname,MAX_PATH_LEN,"%s.%d",fname,cur_epoch);
477 if ((write_fd = open(nextname, O_RDWR|O_CREAT|O_TRUNC)) < 0) {
478 my_log(LOG_ERR, "open(): %s (%s)\n", nextname, strerror(errno));
481 if (fchmod(write_fd,S_IRUSR|S_IWUSR|S_IROTH|S_IRGRP) == -1) {
482 my_log(LOG_ERR, "fchmod() failed: %s (%s). Continuing...\n", nextname, strerror(errno));
484 update_cur_epoch_file(cur_epoch);
493 struct Flow *find(struct Flow *where, struct Flow *what, struct Flow ***prev)
495 struct Flow **flowpp;
501 if (prev) flowpp = *prev;
504 if (where->sip.s_addr == what->sip.s_addr
505 && where->dip.s_addr == what->dip.s_addr
506 && where->proto == what->proto) {
507 switch ((what->flags + where->flags) & FLOW_FRAGMASK) {
509 /* Both unfragmented */
510 if ((what->sp == where->sp)
511 && (what->dp == where->dp)) goto done;
514 /* Both fragmented */
515 if (where->id == what->id) goto done;
519 flowpp = &where->next;
523 if (prev) *prev = flowpp;
527 int put_into(struct Flow *flow, int flag
528 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
535 struct Flow *flown, **flowpp;
536 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
541 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
542 sprintf(buf, " %x H:%04x", (unsigned) flow, h);
545 pthread_mutex_lock(&flows_mutex[h]);
547 if (!(flown = find(flows[h], flow, &flowpp))) {
548 /* No suitable flow found - add */
549 if (flag == COPY_INTO) {
550 if ((flown = mem_alloc())) {
551 copy_flow(flow, flown);
554 #if ((DEBUG) & (DEBUG_S | DEBUG_U)) || defined MESSAGES
555 my_log(LOG_ERR, "%s %s. %s",
556 "mem_alloc():", strerror(errno), "packet lost");
561 flow->next = flows[h];
563 #if ((DEBUG) & DEBUG_I)
565 if (flow->flags & FLOW_FRAG) flows_fragmented++;
567 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
569 sprintf(buf, " => %x, flags: %x", (unsigned) flown, flown->flags);
574 /* Found suitable flow - update */
575 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
576 sprintf(buf, " +> %x", (unsigned) flown);
579 if (cmpmtime(&flow->mtime, &flown->mtime) > 0)
580 flown->mtime = flow->mtime;
581 if (cmpmtime(&flow->ctime, &flown->ctime) < 0)
582 flown->ctime = flow->ctime;
583 flown->tcp_flags |= flow->tcp_flags;
584 flown->size += flow->size;
585 flown->pkts += flow->pkts;
587 /* The xid of the first xid of a flow is misleading. Reset the xid of the flow
588 * if a better value comes along. A good example of this is that by the time CoDemux sets the
589 * peercred of a flow, it has already been accounted for here and attributed to root. */
592 flown->xid = flow->xid;
595 if (flow->flags & FLOW_FRAG) {
596 /* Fragmented flow require some additional work */
597 if (flow->flags & FLOW_TL) {
600 Several packets with FLOW_TL (attack)
602 flown->sp = flow->sp;
603 flown->dp = flow->dp;
605 if (flow->flags & FLOW_LASTFRAG) {
608 Several packets with FLOW_LASTFRAG (attack)
610 flown->sizeP = flow->sizeP;
612 flown->flags |= flow->flags;
613 flown->sizeF += flow->sizeF;
614 if ((flown->flags & FLOW_LASTFRAG)
615 && (flown->sizeF >= flown->sizeP)) {
616 /* All fragments received - flow reassembled */
617 *flowpp = flown->next;
618 pthread_mutex_unlock(&flows_mutex[h]);
619 #if ((DEBUG) & DEBUG_I)
624 flown->flags &= ~FLOW_FRAG;
625 #if ((DEBUG) & (DEBUG_U | DEBUG_S))
628 ret = put_into(flown, MOVE_INTO
629 #if ((DEBUG) & (DEBUG_U | DEBUG_S))
635 if (flag == MOVE_INTO) mem_free(flow);
637 pthread_mutex_unlock(&flows_mutex[h]);
643 void *fill(int fields, uint16_t *format, struct Flow *flow, void *p)
647 for (i = 0; i < fields; i++) {
648 #if ((DEBUG) & DEBUG_F)
649 my_log(LOG_DEBUG, "F: field %04d at %x", format[i], (unsigned) p);
652 case NETFLOW_IPV4_SRC_ADDR:
653 ((struct in_addr *) p)->s_addr = flow->sip.s_addr;
654 p += NETFLOW_IPV4_SRC_ADDR_SIZE;
657 case NETFLOW_IPV4_DST_ADDR:
658 ((struct in_addr *) p)->s_addr = flow->dip.s_addr;
659 if ((flow->dip.s_addr == inet_addr("10.0.0.8"))) {
660 my_log(LOG_INFO, "Created records for test flow. No. of packets=%d",flow->pkts);
662 p += NETFLOW_IPV4_DST_ADDR_SIZE;
665 case NETFLOW_INPUT_SNMP:
666 *((uint16_t *) p) = htons(flow->iif);
667 p += NETFLOW_INPUT_SNMP_SIZE;
670 case NETFLOW_OUTPUT_SNMP:
671 *((uint16_t *) p) = htons(flow->oif);
672 p += NETFLOW_OUTPUT_SNMP_SIZE;
675 case NETFLOW_PKTS_32:
676 *((uint32_t *) p) = htonl(flow->pkts);
677 p += NETFLOW_PKTS_32_SIZE;
680 case NETFLOW_BYTES_32:
681 *((uint32_t *) p) = htonl(flow->size);
682 p += NETFLOW_BYTES_32_SIZE;
685 case NETFLOW_FIRST_SWITCHED:
686 *((uint32_t *) p) = htonl(getuptime(&flow->ctime));
687 p += NETFLOW_FIRST_SWITCHED_SIZE;
690 case NETFLOW_LAST_SWITCHED:
691 *((uint32_t *) p) = htonl(getuptime(&flow->mtime));
692 p += NETFLOW_LAST_SWITCHED_SIZE;
695 case NETFLOW_L4_SRC_PORT:
696 *((uint16_t *) p) = flow->sp;
697 p += NETFLOW_L4_SRC_PORT_SIZE;
700 case NETFLOW_L4_DST_PORT:
701 *((uint16_t *) p) = flow->dp;
702 p += NETFLOW_L4_DST_PORT_SIZE;
706 *((uint8_t *) p) = flow->proto;
707 p += NETFLOW_PROT_SIZE;
710 case NETFLOW_SRC_TOS:
711 *((uint8_t *) p) = flow->tos;
712 p += NETFLOW_SRC_TOS_SIZE;
715 case NETFLOW_TCP_FLAGS:
716 *((uint8_t *) p) = flow->tcp_flags;
717 p += NETFLOW_TCP_FLAGS_SIZE;
720 case NETFLOW_VERSION:
721 *((uint16_t *) p) = htons(netflow->Version);
722 p += NETFLOW_VERSION_SIZE;
726 *((uint16_t *) p) = htons(emit_count);
727 p += NETFLOW_COUNT_SIZE;
731 *((uint32_t *) p) = htonl(getuptime(&emit_time));
732 p += NETFLOW_UPTIME_SIZE;
735 case NETFLOW_UNIX_SECS:
736 *((uint32_t *) p) = htonl(emit_time.sec);
737 p += NETFLOW_UNIX_SECS_SIZE;
740 case NETFLOW_UNIX_NSECS:
741 *((uint32_t *) p) = htonl(emit_time.usec * 1000);
742 p += NETFLOW_UNIX_NSECS_SIZE;
745 case NETFLOW_FLOW_SEQUENCE:
746 //*((uint32_t *) p) = htonl(emit_sequence);
747 *((uint32_t *) p) = 0;
748 p += NETFLOW_FLOW_SEQUENCE_SIZE;
752 /* Unsupported (uint8_t) */
753 case NETFLOW_ENGINE_TYPE:
754 case NETFLOW_ENGINE_ID:
755 case NETFLOW_FLAGS7_1:
756 case NETFLOW_SRC_MASK:
757 case NETFLOW_DST_MASK:
759 my_log(LOG_CRIT, "Adding SRC/DST masks: this version of fprobe is seriously broken\n");
762 *((uint8_t *) p) = 0;
763 p += NETFLOW_PAD8_SIZE;
766 *((uint32_t *) p) = flow->xid;
767 p += NETFLOW_XID_SIZE;
770 /* Unsupported (uint16_t) */
773 case NETFLOW_FLAGS7_2:
774 *((uint16_t *) p) = 0;
775 p += NETFLOW_PAD16_SIZE;
779 /* Unsupported (uint32_t) */
780 case NETFLOW_IPV4_NEXT_HOP:
781 case NETFLOW_ROUTER_SC:
782 *((uint32_t *) p) = 0;
783 p += NETFLOW_PAD32_SIZE;
787 my_log(LOG_CRIT, "fill(): Unknown format at %x[%d]: %d",
788 format, i, format[i]);
792 #if ((DEBUG) & DEBUG_F)
793 my_log(LOG_DEBUG, "F: return %x", (unsigned) p);
800 Workaround for clone()-based threads
801 Try to change EUID independently of main thread
805 setregid(pw->pw_gid, pw->pw_gid);
806 setreuid(pw->pw_uid, pw->pw_uid);
815 struct timespec timeout;
816 int i, ret, sent = 0, size, delay, peer_rot_cur, peer_rot_work = 0;
818 p = (void *) &emit_packet + netflow->HeaderSize;
824 pthread_mutex_lock(&emit_mutex);
825 while (!flows_emit) {
826 gettimeofday(&now, 0);
827 timeout.tv_sec = now.tv_sec + emit_timeout;
828 /* Do not wait until emit_packet will filled - it may be too long */
829 if (pthread_cond_timedwait(&emit_cond, &emit_mutex, &timeout) && emit_count) {
830 pthread_mutex_unlock(&emit_mutex);
835 flows_emit = flows_emit->next;
836 #if ((DEBUG) & DEBUG_I)
839 pthread_mutex_unlock(&emit_mutex);
843 gettime(&start_time);
844 start_time.sec -= start_time_offset;
847 p = fill(netflow->FlowFields, netflow->FlowFormat, flow, p);
851 printf("Emit count = %d\n", emit_count);
854 if (emit_count == netflow->MaxFlows) {
857 p = fill(netflow->HeaderFields, netflow->HeaderFormat, 0, &emit_packet);
858 size = netflow->HeaderSize + emit_count * netflow->FlowSize;
859 /* Netflow PDUs need to be padded to 1464 bytes - Sapan */
860 #ifdef STD_NETFLOW_PDU
861 if (size < NETFLOW_PDU_SIZE) size = NETFLOW_PDU_SIZE;
864 for (i = 0; i < npeers; i++) {
865 if (peers[i].type == PEER_FILE) {
866 if (netflow->SeqOffset)
867 *((uint32_t *) (emit_packet + netflow->SeqOffset)) = htonl(peers[0].seq);
868 peers[i].write_fd = get_data_file_fd(peers[i].fname, peers[i].write_fd);
869 ret = write(peers[i].write_fd, emit_packet, size);
872 #if ((DEBUG) & DEBUG_E) || defined MESSAGES
873 my_log(LOG_ERR, "write(to #%d, seq %d, flows %d, size %d) == %d: %s",
874 i + 1, peers[i].seq, emit_count, size, ret, strerror(errno));
878 #if ((DEBUG) & DEBUG_E)
880 my_log(LOG_DEBUG, "E: Emitted %d flow(s) to #%d, seq %d",
881 emit_count, i + 1, peers[i].seq);
884 peers[i].seq += emit_count;
887 if (emit_rate_bytes) {
889 delay = sent / emit_rate_bytes;
891 sent %= emit_rate_bytes;
893 timeout.tv_nsec = emit_rate_delay * delay;
894 while (nanosleep(&timeout, &timeout) == -1 && errno == EINTR);
899 if (peers[i].type == PEER_MIRROR) goto sendreal;
901 if (peers[i].type == PEER_ROTATE)
902 if (peer_rot_cur++ == peer_rot_work) {
904 if (netflow->SeqOffset)
905 *((uint32_t *) (emit_packet + netflow->SeqOffset)) = htonl(peers[i].seq);
906 ret = send(peers[i].write_fd, emit_packet, size, 0);
908 #if ((DEBUG) & DEBUG_E) || defined MESSAGES
909 my_log(LOG_ERR, "send(to #%d, seq %d, flows %d, size %d) == %d: %s",
910 i + 1, peers[i].seq, emit_count, size, ret, strerror(errno));
913 #if ((DEBUG) & DEBUG_E)
915 my_log(LOG_DEBUG, "E: Emitted %d flow(s) to #%d, seq %d",
916 emit_count, i + 1, peers[i].seq);
919 peers[i].seq += emit_count;
922 if (emit_rate_bytes) {
924 delay = sent / emit_rate_bytes;
926 sent %= emit_rate_bytes;
928 timeout.tv_nsec = emit_rate_delay * delay;
929 while (nanosleep(&timeout, &timeout) == -1 && errno == EINTR);
934 if (npeers_rot) peer_rot_work = (peer_rot_work + 1) % npeers_rot;
935 emit_sequence += emit_count;
937 #if ((DEBUG) & DEBUG_I)
944 void *unpending_thread()
947 struct timespec timeout;
948 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
955 pthread_mutex_lock(&unpending_mutex);
958 while (!(pending_tail->flags & FLOW_PENDING)) {
959 gettimeofday(&now, 0);
960 timeout.tv_sec = now.tv_sec + unpending_timeout;
961 pthread_cond_timedwait(&unpending_cond, &unpending_mutex, &timeout);
964 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
967 if (put_into(pending_tail, COPY_INTO
968 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
972 #if ((DEBUG) & DEBUG_I)
973 pkts_lost_unpending++;
977 #if ((DEBUG) & DEBUG_U)
978 my_log(LOG_DEBUG, "%s%s", "U:", logbuf);
981 pending_tail->flags = 0;
982 pending_tail = pending_tail->next;
983 #if ((DEBUG) & DEBUG_I)
991 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
995 struct Flow *flow, **flowpp;
997 struct timespec timeout;
1001 timeout.tv_nsec = 0;
1002 pthread_mutex_lock(&scan_mutex);
1006 timeout.tv_sec = now.sec + scan_interval;
1007 pthread_cond_timedwait(&scan_cond, &scan_mutex, &timeout);
1010 #if ((DEBUG) & DEBUG_S)
1011 my_log(LOG_DEBUG, "S: %d", now.sec);
1013 for (i = 0; i < 1 << HASH_BITS ; i++) {
1014 pthread_mutex_lock(&flows_mutex[i]);
1018 if (flow->flags & FLOW_FRAG) {
1019 /* Process fragmented flow */
1020 if ((now.sec - flow->mtime.sec) > frag_lifetime) {
1021 /* Fragmented flow expired - put it into special chain */
1022 #if ((DEBUG) & DEBUG_I)
1026 *flowpp = flow->next;
1028 flow->flags &= ~FLOW_FRAG;
1029 flow->next = scan_frag_dreg;
1030 scan_frag_dreg = flow;
1035 /* Flow is not frgamented */
1036 if ((now.sec - flow->mtime.sec) > inactive_lifetime
1037 || (flow->mtime.sec - flow->ctime.sec) > active_lifetime) {
1039 #if ((DEBUG) & DEBUG_S)
1040 my_log(LOG_DEBUG, "S: E %x", flow);
1042 #if ((DEBUG) & DEBUG_I)
1045 *flowpp = flow->next;
1046 pthread_mutex_lock(&emit_mutex);
1047 flow->next = flows_emit;
1049 #if ((DEBUG) & DEBUG_I)
1052 pthread_mutex_unlock(&emit_mutex);
1057 flowpp = &flow->next;
1060 pthread_mutex_unlock(&flows_mutex[i]);
1062 if (flows_emit) pthread_cond_signal(&emit_cond);
1064 while (scan_frag_dreg) {
1065 flow = scan_frag_dreg;
1066 scan_frag_dreg = flow->next;
1067 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
1070 put_into(flow, MOVE_INTO
1071 #if ((DEBUG) & (DEBUG_S | DEBUG_U))
1075 #if ((DEBUG) & DEBUG_S)
1076 my_log(LOG_DEBUG, "%s%s", "S: FE", logbuf);
1084 struct ulog_packet_msg *ulog_msg;
1088 int len, off_frag, psize;
1089 #if ((DEBUG) & DEBUG_C)
1098 len = ipulog_read(ulog_handle, cap_buf, CAPTURE_SIZE, 1);
1100 my_log(LOG_ERR, "ipulog_read(): %s", ipulog_strerror(ipulog_errno));
1103 while ((ulog_msg = ipulog_get_packet(ulog_handle, cap_buf, len))) {
1105 #if ((DEBUG) & DEBUG_C)
1106 sprintf(logbuf, "C: %d", ulog_msg->data_len);
1109 nl = (void *) &ulog_msg->payload;
1110 psize = ulog_msg->data_len;
1113 if (psize < (signed) sizeof(struct ip) || nl->ip_v != 4) {
1114 #if ((DEBUG) & DEBUG_C)
1115 strcat(logbuf, " U");
1116 my_log(LOG_DEBUG, "%s", logbuf);
1118 #if ((DEBUG) & DEBUG_I)
1124 if (pending_head->flags) {
1125 #if ((DEBUG) & DEBUG_C) || defined MESSAGES
1127 # if ((DEBUG) & DEBUG_C)
1132 "pending queue full:", "packet lost");
1134 #if ((DEBUG) & DEBUG_I)
1135 pkts_lost_capture++;
1140 #if ((DEBUG) & DEBUG_I)
1144 flow = pending_head;
1146 /* ?FIXME? Add sanity check for ip_len? */
1147 flow->size = ntohs(nl->ip_len);
1148 #if ((DEBUG) & DEBUG_I)
1149 size_total += flow->size;
1152 flow->sip = nl->ip_src;
1153 flow->dip = nl->ip_dst;
1154 flow->tos = mark_is_tos ? ulog_msg->mark : nl->ip_tos;
1156 /* It's going to be expensive calling this syscall on every flow.
1157 * We should keep a local hash table, for now just bear the overhead... - Sapan*/
1161 if (ulog_msg->mark > 0) {
1162 /* flow->xid is really the slice id :-/ */
1163 flow->xid = xid_to_slice_id(ulog_msg->mark);
1166 if (flow->xid < 1 || flow->xid!=challenge)
1167 flow->xid = ulog_msg->mark;
1170 if ((flow->dip.s_addr == inet_addr("10.0.0.8")) || (flow->sip.s_addr == inet_addr("10.0.0.8"))) {
1171 my_log(LOG_INFO, "Received test flow to corewars.org from slice %d ",flow->xid);
1173 flow->iif = snmp_index(ulog_msg->indev_name);
1174 flow->oif = snmp_index(ulog_msg->outdev_name);
1175 flow->proto = nl->ip_p;
1177 flow->tcp_flags = 0;
1181 /* Packets captured from OUTPUT table didn't contains valid timestamp */
1182 if (ulog_msg->timestamp_sec) {
1183 flow->ctime.sec = ulog_msg->timestamp_sec;
1184 flow->ctime.usec = ulog_msg->timestamp_usec;
1185 } else gettime(&flow->ctime);
1186 flow->mtime = flow->ctime;
1188 off_frag = (ntohs(nl->ip_off) & IP_OFFMASK) << 3;
1191 Offset (from network layer) to transport layer header/IP data
1192 IOW IP header size ;-)
1195 Check ip_hl for valid value (>=5)? Maybe check CRC? No, thanks...
1197 off_tl = nl->ip_hl << 2;
1198 tl = (void *) nl + off_tl;
1200 /* THIS packet data size: data_size = total_size - ip_header_size*4 */
1201 flow->sizeF = ntohs(nl->ip_len) - off_tl;
1203 if ((signed) flow->sizeF < 0) flow->sizeF = 0;
1204 if (psize > (signed) flow->sizeF) psize = flow->sizeF;
1206 if (ntohs(nl->ip_off) & (IP_MF | IP_OFFMASK)) {
1207 /* Fragmented packet (IP_MF flag == 1 or fragment offset != 0) */
1208 #if ((DEBUG) & DEBUG_C)
1209 strcat(logbuf, " F");
1211 #if ((DEBUG) & DEBUG_I)
1212 pkts_total_fragmented++;
1214 flow->flags |= FLOW_FRAG;
1215 flow->id = nl->ip_id;
1217 if (!(ntohs(nl->ip_off) & IP_MF)) {
1218 /* Packet whith IP_MF contains information about whole datagram size */
1219 flow->flags |= FLOW_LASTFRAG;
1220 /* size = frag_offset*8 + data_size */
1221 flow->sizeP = off_frag + flow->sizeF;
1225 #if ((DEBUG) & DEBUG_C)
1226 sprintf(buf, " %s@%u>", inet_ntoa(flow->sip), flow->iif);
1227 strcat(logbuf, buf);
1228 sprintf(buf, "%s@%u P:%x", inet_ntoa(flow->dip), flow->oif, flow->proto);
1229 strcat(logbuf, buf);
1233 Fortunately most interesting transport layer information fit
1234 into first 8 bytes of IP data field (minimal nonzero size).
1235 Thus we don't need actual packet reassembling to build whole
1236 transport layer data. We only check the fragment offset for
1237 zero value to find packet with this information.
1239 if (!off_frag && psize >= 8) {
1240 switch (flow->proto) {
1243 flow->sp = ((struct udphdr *)tl)->uh_sport;
1244 flow->dp = ((struct udphdr *)tl)->uh_dport;
1249 flow->sp = htons(((struct icmp *)tl)->icmp_type);
1250 flow->dp = htons(((struct icmp *)tl)->icmp_code);
1253 #ifdef ICMP_TRICK_CISCO
1255 flow->dp = *((int32_t *) tl);
1260 /* Unknown transport layer */
1261 #if ((DEBUG) & DEBUG_C)
1262 strcat(logbuf, " U");
1269 #if ((DEBUG) & DEBUG_C)
1270 sprintf(buf, " %d>%d", ntohs(flow->sp), ntohs(flow->dp));
1271 strcat(logbuf, buf);
1273 flow->flags |= FLOW_TL;
1277 /* Check for tcp flags presence (including CWR and ECE). */
1278 if (flow->proto == IPPROTO_TCP
1280 && psize >= 16 - off_frag) {
1281 flow->tcp_flags = *((uint8_t *)(tl + 13 - off_frag));
1282 #if ((DEBUG) & DEBUG_C)
1283 sprintf(buf, " TCP:%x", flow->tcp_flags);
1284 strcat(logbuf, buf);
1288 #if ((DEBUG) & DEBUG_C)
1289 sprintf(buf, " => %x", (unsigned) flow);
1290 strcat(logbuf, buf);
1291 my_log(LOG_DEBUG, "%s", logbuf);
1294 #if ((DEBUG) & DEBUG_I)
1296 pending_queue_trace_candidate = pkts_pending - pkts_pending_done;
1297 if (pending_queue_trace < pending_queue_trace_candidate)
1298 pending_queue_trace = pending_queue_trace_candidate;
1301 /* Flow complete - inform unpending_thread() about it */
1302 pending_head->flags |= FLOW_PENDING;
1303 pending_head = pending_head->next;
1305 pthread_cond_signal(&unpending_cond);
1311 /* Copied out of CoDemux */
1313 static int init_daemon() {
1317 pidfile = fopen(PIDFILE, "w");
1318 if (pidfile == NULL) {
1319 my_log(LOG_ERR, "%s creation failed\n", PIDFILE);
1322 if ((pid = fork()) < 0) {
1324 my_log(LOG_ERR, "Could not fork!\n");
1327 else if (pid != 0) {
1328 /* i'm the parent, writing down the child pid */
1329 fprintf(pidfile, "%u\n", pid);
1334 /* close the pid file */
1337 /* routines for any daemon process
1338 1. create a new session
1339 2. change directory to the root
1340 3. change the file creation permission
1343 chdir("/var/local/fprobe");
1349 int main(int argc, char **argv)
1352 char *dhost, *dport, *lhost, *type = 0, *log_suffix = 0, *rule;
1353 int c, i, write_fd, memory_limit = 0;
1354 struct addrinfo hints, *res;
1355 struct sockaddr_in saddr;
1356 pthread_attr_t tattr;
1357 struct sigaction sigact;
1358 static void *threads[THREADS - 1] = {&emit_thread, &scan_thread, &unpending_thread, &cap_thread};
1359 struct timeval timeout;
1361 sched_min = sched_get_priority_min(SCHED);
1362 sched_max = sched_get_priority_max(SCHED);
1364 memset(&saddr, 0 , sizeof(saddr));
1365 memset(&hints, 0 , sizeof(hints));
1366 hints.ai_flags = AI_PASSIVE;
1367 hints.ai_family = AF_INET;
1368 hints.ai_socktype = SOCK_DGRAM;
1370 /* Process command line options */
1373 while ((c = my_getopt(argc, argv, parms)) != -1) {
1383 if (parms[Uflag].count) ulog_gmask = atoi(parms[Uflag].arg);
1384 if (parms[Wflag].count) cur_epoch = atoi(parms[Wflag].arg);
1385 if (parms[Tflag].count) log_epochs = atoi(parms[Tflag].arg);
1386 if (parms[Eflag].count) epoch_length = atoi(parms[Eflag].arg);
1387 if (parms[sflag].count) scan_interval = atoi(parms[sflag].arg);
1388 if (parms[gflag].count) frag_lifetime = atoi(parms[gflag].arg);
1389 if (parms[dflag].count) inactive_lifetime = atoi(parms[dflag].arg);
1390 if (parms[Dflag].count) min_free = atoi(parms[Dflag].arg);
1391 if (parms[eflag].count) active_lifetime = atoi(parms[eflag].arg);
1392 if (parms[nflag].count) {
1393 switch (atoi(parms[nflag].arg)) {
1395 netflow = &NetFlow1;
1402 netflow = &NetFlow7;
1406 fprintf(stderr, "Illegal %s\n", "NetFlow version");
1410 if (parms[vflag].count) verbosity = atoi(parms[vflag].arg);
1411 if (parms[lflag].count) {
1412 if ((log_suffix = strchr(parms[lflag].arg, ':'))) {
1415 sprintf(errpbuf, "[%s]", log_suffix);
1416 strcat(ident, errpbuf);
1419 if (*parms[lflag].arg) log_dest = atoi(parms[lflag].arg);
1420 if (log_suffix) *--log_suffix = ':';
1422 if (!(pidfilepath = malloc(sizeof(PID_DIR) + 1 + strlen(ident) + 1 + 3 + 1))) {
1424 fprintf(stderr, "malloc(): %s\n", strerror(errno));
1427 sprintf(pidfilepath, "%s/%s.pid", PID_DIR, ident);
1428 if (parms[qflag].count) {
1429 pending_queue_length = atoi(parms[qflag].arg);
1430 if (pending_queue_length < 1) {
1431 fprintf(stderr, "Illegal %s\n", "pending queue length");
1435 if (parms[rflag].count) {
1436 schedp.sched_priority = atoi(parms[rflag].arg);
1437 if (schedp.sched_priority
1438 && (schedp.sched_priority < sched_min
1439 || schedp.sched_priority > sched_max)) {
1440 fprintf(stderr, "Illegal %s\n", "realtime priority");
1444 if (parms[Bflag].count) {
1445 sockbufsize = atoi(parms[Bflag].arg) << 10;
1447 if (parms[bflag].count) {
1448 bulk_quantity = atoi(parms[bflag].arg);
1449 if (bulk_quantity < 1 || bulk_quantity > BULK_QUANTITY_MAX) {
1450 fprintf(stderr, "Illegal %s\n", "bulk size");
1454 if (parms[mflag].count) memory_limit = atoi(parms[mflag].arg) << 10;
1455 if (parms[Xflag].count) {
1456 for(i = 0; parms[Xflag].arg[i]; i++)
1457 if (parms[Xflag].arg[i] == ':') nsnmp_rules++;
1458 if (!(snmp_rules = malloc(nsnmp_rules * sizeof(struct snmp_rule))))
1460 rule = strtok(parms[Xflag].arg, ":");
1461 for (i = 0; rule; i++) {
1462 snmp_rules[i].len = strlen(rule);
1463 if (snmp_rules[i].len > IFNAMSIZ) {
1464 fprintf(stderr, "Illegal %s\n", "interface basename");
1467 strncpy(snmp_rules[i].basename, rule, snmp_rules[i].len);
1468 if (!*(rule - 1)) *(rule - 1) = ',';
1469 rule = strtok(NULL, ",");
1471 fprintf(stderr, "Illegal %s\n", "SNMP rule");
1474 snmp_rules[i].base = atoi(rule);
1476 rule = strtok(NULL, ":");
1480 if (parms[tflag].count)
1481 sscanf(parms[tflag].arg, "%d:%d", &emit_rate_bytes, &emit_rate_delay);
1482 if (parms[aflag].count) {
1483 if (getaddrinfo(parms[aflag].arg, 0, &hints, &res)) {
1485 fprintf(stderr, "Illegal %s\n", "source address");
1488 saddr = *((struct sockaddr_in *) res->ai_addr);
1492 if (parms[uflag].count)
1493 if ((pw = getpwnam(parms[uflag].arg)) == NULL) {
1494 fprintf(stderr, "getpwnam(%s): %s\n", parms[uflag].arg, errno ? strerror(errno) : "Unknown user");
1499 /* Process collectors parameters. Brrrr... :-[ */
1501 npeers = argc - optind;
1503 /* Send to remote Netflow collector */
1504 if (!(peers = malloc(npeers * sizeof(struct peer)))) goto err_malloc;
1505 for (i = optind, npeers = 0; i < argc; i++, npeers++) {
1507 if (!(dport = strchr(dhost, ':'))) goto bad_collector;
1509 if ((write_fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1510 fprintf(stderr, "socket(): %s\n", strerror(errno));
1513 peers[npeers].write_fd = write_fd;
1514 peers[npeers].type = PEER_MIRROR;
1515 peers[npeers].laddr = saddr;
1516 peers[npeers].seq = 0;
1517 if ((lhost = strchr(dport, '/'))) {
1519 if ((type = strchr(lhost, '/'))) {
1527 peers[npeers].type = PEER_ROTATE;
1536 if (getaddrinfo(lhost, 0, &hints, &res)) goto bad_lhost;
1537 peers[npeers].laddr = *((struct sockaddr_in *) res->ai_addr);
1541 if (bind(write_fd, (struct sockaddr *) &peers[npeers].laddr,
1542 sizeof(struct sockaddr_in))) {
1543 fprintf(stderr, "bind(): %s\n", strerror(errno));
1546 if (getaddrinfo(dhost, dport, &hints, &res)) {
1548 fprintf(stderr, "Error in collector #%d parameters\n", npeers + 1);
1551 peers[npeers].addr = *((struct sockaddr_in *) res->ai_addr);
1553 if (connect(write_fd, (struct sockaddr *) &peers[npeers].addr,
1554 sizeof(struct sockaddr_in))) {
1555 fprintf(stderr, "connect(): %s\n", strerror(errno));
1559 /* Restore command line */
1560 if (type) *--type = '/';
1561 if (lhost) *--lhost = '/';
1565 else if (parms[fflag].count) {
1567 if (!(peers = malloc(npeers * sizeof(struct peer)))) goto err_malloc;
1568 if (!(peers[npeers].fname = malloc(strnlen(parms[fflag].arg,MAX_PATH_LEN)))) goto err_malloc;
1569 strncpy(peers[npeers].fname, parms[fflag].arg, MAX_PATH_LEN);
1571 peers[npeers].write_fd = START_DATA_FD;
1572 peers[npeers].type = PEER_FILE;
1573 peers[npeers].seq = 0;
1582 if (!(cap_buf = malloc(CAPTURE_SIZE))) goto err_malloc;
1583 ulog_handle = ipulog_create_handle(ulog_gmask, CAPTURE_SIZE);
1585 fprintf(stderr, "libipulog initialization error: %s",
1586 ipulog_strerror(ipulog_errno));
1590 if (setsockopt(ulog_handle->fd, SOL_SOCKET, SO_RCVBUF,
1591 &sockbufsize, sizeof(sockbufsize)) < 0)
1592 fprintf(stderr, "setsockopt(): %s", strerror(errno));
1594 /* Daemonize (if log destination stdout-free) */
1596 my_log_open(ident, verbosity, log_dest);
1600 if (!(log_dest & 2)) {
1601 /* Crash-proofing - Sapan*/
1605 fprintf(stderr, "fork(): %s", strerror(errno));
1610 freopen("/dev/null", "r", stdin);
1611 freopen("/dev/null", "w", stdout);
1612 freopen("/dev/null", "w", stderr);
1616 while (wait3(NULL,0,NULL) < 1);
1620 setvbuf(stdout, (char *)0, _IONBF, 0);
1621 setvbuf(stderr, (char *)0, _IONBF, 0);
1625 sprintf(errpbuf, "[%ld]", (long) pid);
1626 strcat(ident, errpbuf);
1628 /* Initialization */
1630 init_slice_id_hash();
1631 hash_init(); /* Actually for crc16 only */
1632 mem_init(sizeof(struct Flow), bulk_quantity, memory_limit);
1633 for (i = 0; i < 1 << HASH_BITS; i++) pthread_mutex_init(&flows_mutex[i], 0);
1636 /* Hope 12 days is enough :-/ */
1637 start_time_offset = 1 << 20;
1639 /* start_time_offset = active_lifetime + inactive_lifetime + scan_interval; */
1641 gettime(&start_time);
1644 Build static pending queue as circular buffer.
1646 if (!(pending_head = mem_alloc())) goto err_mem_alloc;
1647 pending_tail = pending_head;
1648 for (i = pending_queue_length - 1; i--;) {
1649 if (!(pending_tail->next = mem_alloc())) {
1651 my_log(LOG_CRIT, "mem_alloc(): %s", strerror(errno));
1654 pending_tail = pending_tail->next;
1656 pending_tail->next = pending_head;
1657 pending_tail = pending_head;
1659 sigemptyset(&sig_mask);
1660 sigact.sa_handler = &sighandler;
1661 sigact.sa_mask = sig_mask;
1662 sigact.sa_flags = 0;
1663 sigaddset(&sig_mask, SIGTERM);
1664 sigaction(SIGTERM, &sigact, 0);
1665 #if ((DEBUG) & DEBUG_I)
1666 sigaddset(&sig_mask, SIGUSR1);
1667 sigaction(SIGUSR1, &sigact, 0);
1669 if (pthread_sigmask(SIG_BLOCK, &sig_mask, 0)) {
1670 my_log(LOG_CRIT, "pthread_sigmask(): %s", strerror(errno));
1674 my_log(LOG_INFO, "Starting %s...", VERSION);
1676 if (parms[cflag].count) {
1677 if (chdir(parms[cflag].arg) || chroot(".")) {
1678 my_log(LOG_CRIT, "could not chroot to %s: %s", parms[cflag].arg, strerror(errno));
1683 schedp.sched_priority = schedp.sched_priority - THREADS + 2;
1684 pthread_attr_init(&tattr);
1685 for (i = 0; i < THREADS - 1; i++) {
1686 if (schedp.sched_priority > 0) {
1687 if ((pthread_attr_setschedpolicy(&tattr, SCHED)) ||
1688 (pthread_attr_setschedparam(&tattr, &schedp))) {
1689 my_log(LOG_CRIT, "pthread_attr_setschedpolicy(): %s", strerror(errno));
1693 if (pthread_create(&thid, &tattr, threads[i], 0)) {
1694 my_log(LOG_CRIT, "pthread_create(): %s", strerror(errno));
1697 pthread_detach(thid);
1698 schedp.sched_priority++;
1702 if (setgroups(0, NULL)) {
1703 my_log(LOG_CRIT, "setgroups(): %s", strerror(errno));
1706 if (setregid(pw->pw_gid, pw->pw_gid)) {
1707 my_log(LOG_CRIT, "setregid(%u): %s", pw->pw_gid, strerror(errno));
1710 if (setreuid(pw->pw_uid, pw->pw_uid)) {
1711 my_log(LOG_CRIT, "setreuid(%u): %s", pw->pw_uid, strerror(errno));
1716 if (!(pidfile = fopen(pidfilepath, "w")))
1717 my_log(LOG_ERR, "Can't create pid file. fopen(): %s", strerror(errno));
1719 fprintf(pidfile, "%ld\n", (long) pid);
1723 my_log(LOG_INFO, "pid: %d", pid);
1724 my_log(LOG_INFO, "options: u=%u s=%u g=%u d=%u e=%u n=%u a=%s "
1725 "M=%d b=%u m=%u q=%u B=%u r=%u t=%u:%u c=%s u=%s v=%u l=%u%s",
1726 ulog_gmask, scan_interval, frag_lifetime, inactive_lifetime, active_lifetime,
1727 netflow->Version, inet_ntoa(saddr.sin_addr), mark_is_tos, bulk_quantity,
1728 memory_limit >> 10, pending_queue_length, sockbufsize >> 10, schedp.sched_priority - 1,
1729 emit_rate_bytes, emit_rate_delay, parms[cflag].count ? parms[cflag].arg : "",
1730 parms[uflag].count ? parms[uflag].arg : "", verbosity, log_dest, log_suffix ? log_suffix : "");
1731 for (i = 0; i < nsnmp_rules; i++) {
1732 my_log(LOG_INFO, "SNMP rule #%d %s:%d",
1733 i + 1, snmp_rules[i].basename, snmp_rules[i].base);
1735 for (i = 0; i < npeers; i++) {
1736 switch (peers[i].type) {
1744 snprintf(errpbuf, sizeof(errpbuf), "%s", inet_ntoa(peers[i].laddr.sin_addr));
1745 my_log(LOG_INFO,"collector #%d: %s:%u/%s/%c", i + 1,
1746 inet_ntoa(peers[i].addr.sin_addr), ntohs(peers[i].addr.sin_port), errpbuf, c);
1749 pthread_sigmask(SIG_UNBLOCK, &sig_mask, 0);
1751 timeout.tv_usec = 0;
1753 || (total_elements - free_elements - pending_queue_length)
1755 || pending_tail->flags) {
1758 timeout.tv_sec = scan_interval;
1759 select(0, 0, 0, 0, &timeout);
1762 if (sigs & SIGTERM_MASK && !killed) {
1763 sigs &= ~SIGTERM_MASK;
1764 my_log(LOG_INFO, "SIGTERM received. Emitting flows cache...");
1767 active_lifetime = -1;
1768 inactive_lifetime = -1;
1770 unpending_timeout = 1;
1772 pthread_cond_signal(&scan_cond);
1773 pthread_cond_signal(&unpending_cond);
1776 #if ((DEBUG) & DEBUG_I)
1777 if (sigs & SIGUSR1_MASK) {
1778 sigs &= ~SIGUSR1_MASK;
1783 remove(pidfilepath);
1784 #if ((DEBUG) & DEBUG_I)
1787 my_log(LOG_INFO, "Done.");