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AUTHORS: add Whang Choi
[netsniff-ng.git] / trafgen.c
blobe6286465dc31889387ec80a4f14221ce0b83e419
1 /*
2 * netsniff-ng - the packet sniffing beast
3 * Copyright 2011 - 2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
4 * Swiss federal institute of technology (ETH Zurich)
5 * Subject to the GPL, version 2.
6 */
7
8 #define _GNU_SOURCE
9
10 #include <stdio.h>
11 #include <string.h>
12 #include <getopt.h>
13 #include <ctype.h>
14 #include <stdbool.h>
15 #include <sched.h>
16 #include <sys/socket.h>
17 #include <sys/types.h>
18 #include <sys/fsuid.h>
19 #include <sys/prctl.h>
20 #include <sys/stat.h>
21 #include <sys/wait.h>
22 #include <sys/mman.h>
23 #include <net/ethernet.h>
24 #include <netinet/in.h>
25 #include <netinet/ip.h>
26 #include <linux/icmp.h>
27 #include <linux/if.h>
28 #include <arpa/inet.h>
29 #include <signal.h>
30 #include <stdint.h>
31 #include <stdlib.h>
32 #include <fcntl.h>
33 #include <time.h>
34 #include <poll.h>
35 #include <netdb.h>
36 #include <math.h>
37 #include <unistd.h>
38
39 #include "xmalloc.h"
40 #include "die.h"
41 #include "str.h"
42 #include "sig.h"
43 #include "sock.h"
44 #include "cpus.h"
45 #include "lockme.h"
46 #include "privs.h"
47 #include "proc.h"
48 #include "ioops.h"
49 #include "irq.h"
50 #include "config.h"
51 #include "built_in.h"
52 #include "trafgen_conf.h"
53 #include "tprintf.h"
54 #include "timer.h"
55 #include "ring_tx.h"
56 #include "csum.h"
57 #include "trafgen_proto.h"
58 #include "pcap_io.h"
59 #include "trafgen_dev.h"
60
61 enum shaper_type {
62 SHAPER_NONE,
63 SHAPER_DELAY,
64 SHAPER_PKTS,
65 SHAPER_BYTES,
66 SHAPER_TSTAMP,
67 };
68
69 struct shaper {
70 enum shaper_type type;
71 unsigned long long sent;
72 unsigned long long rate;
73 struct timeval tstamp;
74 struct timespec delay;
75 struct timeval start;
76 struct timeval end;
77 };
78
79 struct ctx {
80 bool rand, rfraw, jumbo_support, verbose, smoke_test, enforce, qdisc_path;
81 size_t reserve_size;
82 struct dev_io *dev_out;
83 struct dev_io *dev_in;
84 unsigned long num;
85 unsigned int cpus;
86 uid_t uid; gid_t gid;
87 char *device, *rhost;
88 struct sockaddr_in dest;
89 struct shaper sh;
90 char *packet_str;
91 char *pcap_in;
92 };
93
94 struct cpu_stats {
95 unsigned long tv_sec, tv_usec;
96 unsigned long long tx_packets, tx_bytes;
97 unsigned long long cf_packets, cf_bytes;
98 unsigned long long cd_packets;
99 sig_atomic_t state;
100 };
101
102 static sig_atomic_t sigint = 0;
103
104 struct packet *packets = NULL;
105 size_t plen = 0;
106
107 struct packet_dyn *packet_dyn = NULL;
108 size_t dlen = 0;
109
110 static const char *short_options = "d:c:n:t:vJhS:rk:i:o:VRs:P:eE:pu:g:CHQqD:b:";
111 static const struct option long_options[] = {
112 {"dev", required_argument, NULL, 'd'},
113 {"out", required_argument, NULL, 'o'},
114 {"in", required_argument, NULL, 'i'},
115 {"conf", required_argument, NULL, 'c'},
116 {"num", required_argument, NULL, 'n'},
117 {"gap", required_argument, NULL, 't'},
118 {"rate", required_argument, NULL, 'b'},
119 {"cpus", required_argument, NULL, 'P'},
120 {"ring-size", required_argument, NULL, 'S'},
121 {"kernel-pull", required_argument, NULL, 'k'},
122 {"smoke-test", required_argument, NULL, 's'},
123 {"seed", required_argument, NULL, 'E'},
124 {"user", required_argument, NULL, 'u'},
125 {"group", required_argument, NULL, 'g'},
126 {"prio-high", no_argument, NULL, 'H'},
127 {"notouch-irq", no_argument, NULL, 'Q'},
128 {"no-sock-mem", no_argument, NULL, 'A'},
129 {"qdisc-path", no_argument, NULL, 'q'},
130 {"jumbo-support", no_argument, NULL, 'J'},
131 {"no-cpu-stats", no_argument, NULL, 'C'},
132 {"cpp", no_argument, NULL, 'p'},
133 {"define", required_argument, NULL, 'D'},
134 {"rfraw", no_argument, NULL, 'R'},
135 {"rand", no_argument, NULL, 'r'},
136 {"verbose", no_argument, NULL, 'V'},
137 {"version", no_argument, NULL, 'v'},
138 {"example", no_argument, NULL, 'e'},
139 {"help", no_argument, NULL, 'h'},
140 {NULL, 0, NULL, 0}
141 };
142
143 static const char *copyright = "Please report bugs to <netsniff-ng@googlegroups.com>\n"
144 "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
145 "Swiss federal institute of technology (ETH Zurich)\n"
146 "License: GNU GPL version 2.0\n"
147 "This is free software: you are free to change and redistribute it.\n"
148 "There is NO WARRANTY, to the extent permitted by law.";
149
150 static struct cpu_stats *stats;
151 static unsigned int seed;
152
153 #define CPU_STATS_STATE_CFG 1
154 #define CPU_STATS_STATE_CHK 2
155 #define CPU_STATS_STATE_RES 4
156
157 #ifndef ICMP_FILTER
158 # define ICMP_FILTER 1
159
160 struct icmp_filter {
161 __u32 data;
162 };
163 #endif
164
165 #define SMOKE_N_PROBES 100
166
167 #define PKT_MIN_LEN 14
168
169 static void signal_handler(int number)
170 {
171 switch (number) {
172 case SIGINT:
173 case SIGQUIT:
174 case SIGTERM:
175 sigint = 1;
176 case SIGHUP:
177 default:
178 break;
179 }
180 }
181
182 static void __noreturn help(void)
183 {
184 printf("trafgen %s, multithreaded zero-copy network packet generator\n", VERSION_STRING);
185 puts("http://www.netsniff-ng.org\n\n"
186 "Usage: trafgen [options] [packet]\n"
187 "Options:\n"
188 " -i|-c|--in|--conf <cfg/-> Packet configuration file/stdin\n"
189 " -o|-d|--out|--dev <netdev|.cfg|.pcap> Networking device or configuration file i.e., eth0\n"
190 " -p|--cpp Run packet config through C preprocessor\n"
191 " -D|--define Add macro/define for C preprocessor\n"
192 " -J|--jumbo-support Support 64KB super jumbo frames (def: 2048B)\n"
193 " -R|--rfraw Inject raw 802.11 frames\n"
194 " -s|--smoke-test <ipv4> Probe if machine survived fuzz-tested packet\n"
195 " -n|--num <uint> Number of packets until exit (def: 0)\n"
196 " -r|--rand Randomize packet selection (def: round robin)\n"
197 " -P|--cpus <uint> Specify number of forks(<= CPUs) (def: #CPUs)\n"
198 " -t|--gap <time> Set approx. interpacket gap (s/ms/us/ns, def: us)\n"
199 " -b|--rate <rate> Send traffic at specified rate (pps/B/kB/MB/GB/kbit/Mbit/Gbit/KiB/MiB/GiB)\n"
200 " -S|--ring-size <size> Manually set mmap size (KiB/MiB/GiB)\n"
201 " -E|--seed <uint> Manually set srand(3) seed\n"
202 " -u|--user <userid> Drop privileges and change to userid\n"
203 " -g|--group <groupid> Drop privileges and change to groupid\n"
204 " -H|--prio-high Make this high priority process\n"
205 " -A|--no-sock-mem Don't tune core socket memory\n"
206 " -Q|--notouch-irq Do not touch IRQ CPU affinity of NIC\n"
207 " -q|--qdisc-path Enable qdisc kernel path (default off since 3.14)\n"
208 " -V|--verbose Be more verbose\n"
209 " -C|--no-cpu-stats Do not print CPU time statistics on exit\n"
210 " -v|--version Show version and exit\n"
211 " -e|--example Show built-in packet config example\n"
212 " -h|--help Guess what?!\n\n"
213 "Examples:\n"
214 " trafgen --dev eth0 --conf trafgen.cfg\n"
215 " trafgen -e | trafgen -i - -o eth0 --cpp -n 1\n"
216 " trafgen --dev eth0 --conf fuzzing.cfg --smoke-test 10.0.0.1\n"
217 " trafgen --dev wlan0 --rfraw --conf beacon-test.txf -V --cpus 2\n"
218 " trafgen --dev eth0 --conf frag_dos.cfg --rand --gap 1000us\n"
219 " trafgen --dev eth0 --conf icmp.cfg --rand --num 1400000 -k1000\n"
220 " trafgen --dev eth0 --conf tcp_syn.cfg -u `id -u bob` -g `id -g bob`\n"
221 " trafgen --dev eth0 '{ fill(0xff, 6), 0x00, 0x02, 0xb3, rnd(3), c16(0x0800), fill(0xca, 64) }'\n\n"
222 "Arbitrary packet config examples (e.g. trafgen -e > trafgen.cfg):\n"
223 " Run packet on all CPUs: { fill(0xff, 64) csum16(0, 64) }\n"
224 " Run packet only on CPU1: cpu(1): { rnd(64), 0b11001100, 0xaa }\n"
225 " Run packet only on CPU1-2: cpu(1-2): { drnd(64),'a',csum16(1, 8),'b',42 }\n\n"
226 "Generate config files from existing pcap using netsniff-ng:\n"
227 " netsniff-ng --in dump.pcap --out dump.cfg\n\n"
228 "Note:\n"
229 " Smoke/fuzz test example: machine A, 10.0.0.2 (trafgen) is directly\n"
230 " connected to machine B (test kernel), 10.0.0.1. If ICMP reply fails\n"
231 " we assume the kernel crashed, thus we print the packet and quit.\n"
232 " In case you find a ping-of-death, please mention trafgen in your\n"
233 " commit message of the fix!\n\n"
234 " For introducing bit errors, delays with random variation and more,\n"
235 " make use of tc(8) with its different disciplines, i.e. netem.\n\n"
236 " For generating different package distributions, you can use scripting\n"
237 " to generate a trafgen config file with packet ratios as:\n\n"
238 " IMIX 64:7, 570:4, 1518:1\n"
239 " Tolly 64:55, 78:5, 576:17, 1518:23\n"
240 " Cisco 64:7, 594:4, 1518:1\n"
241 " RPR Trimodal 64:60, 512:20, 1518:20\n"
242 " RPR Quadrimodal 64:50, 512:15, 1518:15, 9218:20\n");
243 puts(copyright);
244 die();
245 }
246
247 static void __noreturn example(void)
248 {
249 const char *e =
250 "/* Note: dynamic elements make trafgen slower! */\n"
251 "#include <stddef.h>\n\n"
252 "{\n"
253 " /* MAC Destination */\n"
254 " fill(0xff, ETH_ALEN),\n"
255 " /* MAC Source */\n"
256 " 0x00, 0x02, 0xb3, drnd(3),\n"
257 " /* IPv4 Protocol */\n"
258 " c16(ETH_P_IP),\n"
259 " /* IPv4 Version, IHL, TOS */\n"
260 " 0b01000101, 0,\n"
261 " /* IPv4 Total Len */\n"
262 " c16(59),\n"
263 " /* IPv4 Ident */\n"
264 " drnd(2),\n"
265 " /* IPv4 Flags, Frag Off */\n"
266 " 0b01000000, 0,\n"
267 " /* IPv4 TTL */\n"
268 " 64,\n"
269 " /* Proto TCP */\n"
270 " 0x06,\n"
271 " /* IPv4 Checksum (IP header from, to) */\n"
272 " csumip(14, 33),\n"
273 " /* Source IP */\n"
274 " drnd(4),\n"
275 " /* Dest IP */\n"
276 " drnd(4),\n"
277 " /* TCP Source Port */\n"
278 " drnd(2),\n"
279 " /* TCP Dest Port */\n"
280 " c16(80),\n"
281 " /* TCP Sequence Number */\n"
282 " drnd(4),\n"
283 " /* TCP Ackn. Number */\n"
284 " c32(0),\n"
285 " /* TCP Header length + TCP SYN/ECN Flag */\n"
286 " c16((8 << 12) | TCP_FLAG_SYN | TCP_FLAG_ECE)\n"
287 " /* Window Size */\n"
288 " c16(16),\n"
289 " /* TCP Checksum (offset IP, offset TCP) */\n"
290 " csumtcp(14, 34),\n"
291 " /* TCP Options */\n"
292 " 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0x06,\n"
293 " 0x91, 0x68, 0x7d, 0x06, 0x91, 0x68, 0x6f,\n"
294 " /* Data blob */\n"
295 " \"gotcha!\",\n"
296 "}";
297 puts(e);
298 die();
299 }
300
301 static void __noreturn version(void)
302 {
303 printf("trafgen %s, Git id: %s\n", VERSION_LONG, GITVERSION);
304 puts("multithreaded zero-copy network packet generator\n"
305 "http://www.netsniff-ng.org\n");
306 puts(copyright);
307 die();
308 }
309
310 static void apply_counter(int id)
311 {
312 size_t j, counter_max = packet_dyn[id].clen;
313
314 for (j = 0; j < counter_max; ++j) {
315 uint8_t val;
316 struct counter *counter = &packet_dyn[id].cnt[j];
317
318 val = counter->val - counter->min;
319 val = (val + counter->inc) % (counter->max - counter->min + 1);
320
321 counter->val = val + counter->min;
322 packets[id].payload[counter->off] = counter->val;
323 }
324 }
325
326 static void apply_randomizer(int id)
327 {
328 size_t j, rand_max = packet_dyn[id].rlen;
329
330 for (j = 0; j < rand_max; ++j) {
331 uint8_t val = (uint8_t) rand();
332 struct randomizer *randomizer = &packet_dyn[id].rnd[j];
333
334 packets[id].payload[randomizer->off] = val;
335 }
336 }
337
338 static void apply_csum16(int id)
339 {
340 size_t j, csum_max = packet_dyn[id].slen;
341
342 for (j = 0; j < csum_max; ++j) {
343 uint16_t sum = 0;
344 struct csum16 *csum = &packet_dyn[id].csum[j];
345
346 memset(&packets[id].payload[csum->off], 0, sizeof(sum));
347 if (unlikely((size_t) csum->to >= packets[id].len))
348 csum->to = packets[id].len - 1;
349
350 switch (csum->which) {
351 case CSUM_IP:
352 sum = calc_csum(packets[id].payload + csum->from,
353 csum->to - csum->from + 1);
354 break;
355 case CSUM_UDP:
356 sum = p4_csum((void *) packets[id].payload + csum->from,
357 packets[id].payload + csum->to,
358 (packets[id].len - csum->to),
359 IPPROTO_UDP);
360 break;
361 case CSUM_TCP:
362 sum = p4_csum((void *) packets[id].payload + csum->from,
363 packets[id].payload + csum->to,
364 (packets[id].len - csum->to),
365 IPPROTO_TCP);
366 break;
367 case CSUM_UDP6:
368 sum = p6_csum((void *) packets[id].payload + csum->from,
369 packets[id].payload + csum->to,
370 (packets[id].len - csum->to),
371 IPPROTO_UDP);
372 break;
373 case CSUM_TCP6:
374 sum = p6_csum((void *) packets[id].payload + csum->from,
375 packets[id].payload + csum->to,
376 (packets[id].len - csum->to),
377 IPPROTO_TCP);
378 break;
379 case CSUM_ICMP6:
380 sum = p6_csum((void *) packets[id].payload + csum->from,
381 packets[id].payload + csum->to,
382 (packets[id].len - csum->to),
383 IPPROTO_ICMPV6);
384 break;
385 default:
386 bug();
387 break;
388 }
389
390 memcpy(&packets[id].payload[csum->off], &sum, sizeof(sum));
391 }
392 }
393
394 static void preprocess_packets(void)
395 {
396 size_t i;
397
398 for (i = 0; i < plen; i++) {
399 struct packet_dyn *pktd = &packet_dyn[i];
400
401 if (packet_dyn_has_only_csums(pktd)) {
402 apply_csum16(i);
403 pktd->slen = 0;
404 xfree(pktd->csum);
405 }
406 }
407 }
408
409 static struct cpu_stats *setup_shared_var(unsigned int cpus)
410 {
411 int fd;
412 size_t len = cpus * sizeof(struct cpu_stats);
413 char *zbuff, file[256];
414 struct cpu_stats *buff;
415
416 slprintf(file, sizeof(file), ".tmp_mmap.XXXXXX");
417 fd = mkostemp_or_die(file, O_RDWR | O_CREAT | O_TRUNC);
418 zbuff = xzmalloc(len);
419 write_or_die(fd, zbuff, len);
420 xfree(zbuff);
421
422 buff = mmap(NULL, len, PROT_READ | PROT_WRITE,
423 MAP_SHARED, fd, 0);
424 if (buff == MAP_FAILED)
425 panic("Cannot setup shared variable!\n");
426
427 close(fd);
428 unlink(file);
429
430 memset(buff, 0, len);
431 return buff;
432 }
433
434 static void destroy_shared_var(void *buff, unsigned int cpus)
435 {
436 munmap(buff, cpus * sizeof(struct cpu_stats));
437 }
438
439 static void dump_trafgen_snippet(uint8_t *payload, size_t len)
440 {
441 size_t i;
442
443 printf("{");
444 for (i = 0; i < len; ++i) {
445 if (i % 15 == 0)
446 printf("\n ");
447 printf("0x%02x, ", payload[i]);
448 }
449 printf("\n}\n");
450 fflush(stdout);
451 }
452
453 static int xmit_smoke_setup(struct ctx *ctx)
454 {
455 int icmp_sock, ret, ttl = 64;
456 struct icmp_filter filter;
457
458 icmp_sock = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
459 if (icmp_sock < 0)
460 panic("Cannot get a ICMP socket: %s!\n", strerror(errno));
461
462 filter.data = ~(1 << ICMP_ECHOREPLY);
463
464 ret = setsockopt(icmp_sock, SOL_RAW, ICMP_FILTER, &filter, sizeof(filter));
465 if (ret < 0)
466 panic("Cannot install filter!\n");
467
468 ret = setsockopt(icmp_sock, SOL_IP, IP_TTL, &ttl, sizeof(ttl));
469 if (ret < 0)
470 panic("Cannot set TTL!\n");
471
472 memset(&ctx->dest, 0, sizeof(ctx->dest));
473 ctx->dest.sin_family = AF_INET;
474 ctx->dest.sin_port = 0;
475
476 ret = inet_aton(ctx->rhost, &ctx->dest.sin_addr);
477 if (ret < 0)
478 panic("Cannot resolve address!\n");
479
480 return icmp_sock;
481 }
482
483 static int xmit_smoke_probe(int icmp_sock, struct ctx *ctx)
484 {
485 int ret;
486 unsigned int i, j;
487 short ident, cnt = 1, idstore[SMOKE_N_PROBES];
488 uint8_t outpack[512], *data;
489 struct icmphdr *icmp;
490 struct iphdr *ip;
491 size_t len = sizeof(*icmp) + 56;
492 struct sockaddr_in from;
493 socklen_t from_len;
494 struct pollfd fds = {
495 .fd = icmp_sock,
496 .events = POLLIN,
497 };
498
499 memset(idstore, 0, sizeof(idstore));
500 for (j = 0; j < SMOKE_N_PROBES; j++) {
501 while ((ident = htons((short) rand())) == 0)
502 sleep(0);
503 idstore[j] = ident;
504
505 memset(outpack, 0, sizeof(outpack));
506 icmp = (void *) outpack;
507 icmp->type = ICMP_ECHO;
508 icmp->un.echo.id = ident;
509 icmp->un.echo.sequence = htons(cnt++);
510
511 data = ((uint8_t *) outpack + sizeof(*icmp));
512 for (i = 0; i < 56; ++i)
513 data[i] = (uint8_t) rand();
514
515 icmp->checksum = csum((unsigned short *) outpack,
516 len / sizeof(unsigned short));
517
518 ret = sendto(icmp_sock, outpack, len, MSG_DONTWAIT,
519 (struct sockaddr *) &ctx->dest, sizeof(ctx->dest));
520 if (unlikely(ret != (int) len))
521 panic("Cannot send out probe: %s!\n", strerror(errno));
522
523 ret = poll(&fds, 1, 50);
524 if (ret < 0)
525 panic("Poll failed!\n");
526
527 if (fds.revents & POLLIN) {
528 ret = recvfrom(icmp_sock, outpack, sizeof(outpack), 0,
529 (struct sockaddr *) &from, &from_len);
530 if (unlikely(ret <= 0))
531 panic("Probe receive failed!\n");
532 if (unlikely(from_len != sizeof(ctx->dest)))
533 continue;
534 if (unlikely(memcmp(&from, &ctx->dest, sizeof(ctx->dest))))
535 continue;
536 if (unlikely((size_t) ret < sizeof(*ip) + sizeof(*icmp)))
537 continue;
538 ip = (void *) outpack;
539 if (unlikely(ip->ihl * 4 + sizeof(*icmp) > (size_t) ret))
540 continue;
541 icmp = (void *) outpack + ip->ihl * 4;
542 for (i = 0; i < array_size(idstore); ++i) {
543 if (unlikely(icmp->un.echo.id != idstore[i]))
544 continue;
545 return 0;
546 }
547 }
548 }
549
550 return -1;
551 }
552
553 static bool shaper_is_set(struct shaper *sh)
554 {
555 return sh->type != SHAPER_NONE;
556 }
557
558 static void shaper_init(struct shaper *sh)
559 {
560 if (sh->type == SHAPER_NONE || sh->type == SHAPER_DELAY)
561 return;
562
563 memset(&sh->delay, 0, sizeof(struct timespec));
564 bug_on(gettimeofday(&sh->start, NULL));
565 sh->sent = 0;
566 }
567
568 static void shaper_set_delay(struct shaper *sh, time_t sec, long int ns)
569 {
570 if (!(sec | ns)) {
571 sh->type = SHAPER_NONE;
572 return;
573 }
574
575 sh->type = SHAPER_DELAY;
576 sh->delay.tv_sec = sec;
577 sh->delay.tv_nsec = ns;
578 }
579
580 static void shaper_set_rate(struct shaper *sh, unsigned long long rate,
581 enum shaper_type type)
582 {
583 memset(sh, 0, sizeof(struct shaper));
584 sh->rate = rate;
585 sh->type = type;
586 }
587
588 static void shaper_set_tstamp(struct shaper *sh, struct timespec *ts)
589 {
590 TIMESPEC_TO_TIMEVAL(&sh->tstamp, ts);
591 }
592
593 static void shaper_delay(struct shaper *sh, struct packet *pkt)
594 {
595 if (sh->type == SHAPER_BYTES || sh->type == SHAPER_PKTS) {
596 unsigned long pkt_len = pkt->len;
597
598 sh->sent += sh->type == SHAPER_BYTES ? pkt_len : 1;
599
600 if (sh->sent >= sh->rate && sh->rate > 0) {
601 struct timeval delay_us;
602 struct timeval time_sent;
603 struct timeval time_1s = { .tv_sec = 1 };
604
605 bug_on(gettimeofday(&sh->end, NULL));
606 timersub(&sh->end, &sh->start, &time_sent);
607
608 if (timercmp(&time_1s, &time_sent, > )) {
609 timersub(&time_1s, &time_sent, &delay_us);
610 TIMEVAL_TO_TIMESPEC(&delay_us, &sh->delay);
611 }
612 }
613 } else if (sh->type == SHAPER_TSTAMP) {
614 struct timeval tstamp;
615 struct timeval pkt_diff;
616 struct timeval diff;
617
618 bug_on(gettimeofday(&sh->end, NULL));
619 TIMESPEC_TO_TIMEVAL(&tstamp, &pkt->tstamp);
620 timersub(&sh->end, &sh->start, &diff);
621 timersub(&tstamp, &sh->tstamp, &pkt_diff);
622
623 if (timercmp(&diff, &pkt_diff, <)) {
624 struct timeval delay;
625
626 timersub(&pkt_diff, &diff, &delay);
627 TIMEVAL_TO_TIMESPEC(&delay, &sh->delay);
628 }
629
630 memcpy(&sh->tstamp, &tstamp, sizeof(sh->tstamp));
631 }
632
633 if ((sh->delay.tv_sec | sh->delay.tv_nsec) > 0) {
634 nanosleep(&sh->delay, NULL);
635
636 shaper_init(sh);
637 }
638 }
639
640 static inline void packet_apply_dyn_elements(int idx)
641 {
642 if (packet_dyn_has_elems(&packet_dyn[idx])) {
643 apply_counter(idx);
644 apply_randomizer(idx);
645 apply_csum16(idx);
646 }
647
648 if (packet_dyn_has_fields(&packet_dyn[idx])) {
649 uint32_t i;
650
651 for (i = 0; i < packet_dyn[idx].flen; i++)
652 proto_field_dyn_apply(packet_dyn[idx].fields[i]);
653
654 proto_packet_update(idx);
655 }
656 }
657
658 static void xmit_slowpath_or_die(struct ctx *ctx, unsigned int cpu, unsigned long orig_num)
659 {
660 int ret, icmp_sock = -1;
661 unsigned long num = 1, i = 0;
662 struct timeval start, end, diff;
663 unsigned long long tx_bytes = 0, tx_packets = 0;
664
665 if (ctx->num > 0)
666 num = ctx->num;
667 if (ctx->num == 0 && orig_num > 0)
668 num = 0;
669
670 if (ctx->smoke_test)
671 icmp_sock = xmit_smoke_setup(ctx);
672
673 drop_privileges(ctx->enforce, ctx->uid, ctx->gid);
674
675 bug_on(gettimeofday(&start, NULL));
676
677 if (shaper_is_set(&ctx->sh))
678 shaper_init(&ctx->sh);
679
680 while (likely(sigint == 0 && num > 0 && plen > 0)) {
681 packet_apply_dyn_elements(i);
682 retry:
683 ret = dev_io_write(ctx->dev_out, &packets[i]);
684 if (unlikely(ret < 0)) {
685 if (errno == ENOBUFS) {
686 sched_yield();
687 goto retry;
688 }
689 if (ctx->smoke_test)
690 panic("Sendto error: %s!\n", strerror(errno));
691 }
692
693 tx_bytes += packets[i].len;
694 tx_packets++;
695
696 if (ctx->smoke_test) {
697 ret = xmit_smoke_probe(icmp_sock, ctx);
698 if (unlikely(ret < 0)) {
699 printf("%sSmoke test alert:%s\n", colorize_start(bold), colorize_end());
700 printf(" Remote host seems to be unresponsive to ICMP probes!\n");
701 printf(" Last instance was packet%lu, seed:%u, trafgen snippet:\n\n",
702 i, seed);
703
704 dump_trafgen_snippet(packets[i].payload, packets[i].len);
705 break;
706 }
707 }
708
709 if (!ctx->rand) {
710 i++;
711 if (i >= plen)
712 i = 0;
713 } else
714 i = rand() % plen;
715
716 if (ctx->num > 0)
717 num--;
718
719 if (shaper_is_set(&ctx->sh))
720 shaper_delay(&ctx->sh, &packets[i]);
721 }
722
723 bug_on(gettimeofday(&end, NULL));
724 timersub(&end, &start, &diff);
725
726 if (ctx->smoke_test)
727 close(icmp_sock);
728
729 stats[cpu].tx_packets = tx_packets;
730 stats[cpu].tx_bytes = tx_bytes;
731 stats[cpu].tv_sec = diff.tv_sec;
732 stats[cpu].tv_usec = diff.tv_usec;
733
734 stats[cpu].state |= CPU_STATS_STATE_RES;
735 }
736
737 static void xmit_fastpath_or_die(struct ctx *ctx, unsigned int cpu, unsigned long orig_num)
738 {
739 int ifindex = dev_io_ifindex_get(ctx->dev_out);
740 uint8_t *out = NULL;
741 unsigned int it = 0, retry = 100;
742 unsigned long num = 1, i = 0;
743 size_t size = ring_size(dev_io_name_get(ctx->dev_out), ctx->reserve_size);
744 struct ring tx_ring;
745 struct frame_map *hdr;
746 struct timeval start, end, diff;
747 unsigned long long tx_bytes = 0, tx_packets = 0;
748 int sock = dev_io_fd_get(ctx->dev_out);
749
750 set_sock_prio(sock, 512);
751
752 ring_tx_setup(&tx_ring, sock, size, ifindex, ctx->jumbo_support, ctx->verbose);
753
754 drop_privileges(ctx->enforce, ctx->uid, ctx->gid);
755
756 if (ctx->num > 0)
757 num = ctx->num;
758 if (ctx->num == 0 && orig_num > 0)
759 num = 0;
760
761 bug_on(gettimeofday(&start, NULL));
762
763 while (likely(sigint == 0 && num > 0 && plen > 0)) {
764 if (!user_may_pull_from_tx(tx_ring.frames[it].iov_base)) {
765 int ret = pull_and_flush_tx_ring(sock);
766 if (unlikely(ret < 0)) {
767 /* We could hit EBADF if the socket has been closed before
768 * the timer was triggered.
769 */
770 if (errno != EBADF && errno != ENOBUFS)
771 panic("Flushing TX_RING failed: %s!\n", strerror(errno));
772 }
773
774 continue;
775 }
776
777 hdr = tx_ring.frames[it].iov_base;
778 out = ((uint8_t *) hdr) + TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);
779
780 hdr->tp_h.tp_snaplen = packets[i].len;
781 hdr->tp_h.tp_len = packets[i].len;
782
783 packet_apply_dyn_elements(i);
784
785 memcpy(out, packets[i].payload, packets[i].len);
786
787 tx_bytes += packets[i].len;
788 tx_packets++;
789
790 if (!ctx->rand) {
791 i++;
792 if (i >= plen)
793 i = 0;
794 } else
795 i = rand() % plen;
796
797 kernel_may_pull_from_tx(&hdr->tp_h);
798
799 it++;
800 if (it >= tx_ring.layout.tp_frame_nr)
801 it = 0;
802
803 if (ctx->num > 0)
804 num--;
805 }
806
807 bug_on(gettimeofday(&end, NULL));
808 timersub(&end, &start, &diff);
809
810 while (pull_and_flush_tx_ring_wait(sock) < 0 && errno == ENOBUFS && retry-- > 0)
811 usleep(10000);
812 destroy_tx_ring(sock, &tx_ring);
813
814 stats[cpu].tx_packets = tx_packets;
815 stats[cpu].tx_bytes = tx_bytes;
816 stats[cpu].tv_sec = diff.tv_sec;
817 stats[cpu].tv_usec = diff.tv_usec;
818
819 stats[cpu].state |= CPU_STATS_STATE_RES;
820 }
821
822 static inline void __set_state(unsigned int cpu, sig_atomic_t s)
823 {
824 stats[cpu].state = s;
825 }
826
827 static inline sig_atomic_t __get_state(unsigned int cpu)
828 {
829 return stats[cpu].state;
830 }
831
832 static unsigned long __wait_and_sum_others(struct ctx *ctx, unsigned int cpu)
833 {
834 unsigned int i;
835 unsigned long total;
836
837 for (i = 0, total = plen; i < ctx->cpus; i++) {
838 if (i == cpu)
839 continue;
840
841 while ((__get_state(i) &
842 (CPU_STATS_STATE_CFG |
843 CPU_STATS_STATE_RES)) == 0 &&
844 sigint == 0)
845 sched_yield();
846
847 total += stats[i].cf_packets;
848 }
849
850 return total;
851 }
852
853 static void __correct_global_delta(struct ctx *ctx, unsigned int cpu, unsigned long orig)
854 {
855 unsigned int i;
856 unsigned long total;
857 int cpu_sel;
858 long long delta_correction = 0;
859
860 for (i = 0, total = ctx->num; i < ctx->cpus; i++) {
861 if (i == cpu)
862 continue;
863
864 while ((__get_state(i) &
865 (CPU_STATS_STATE_CHK |
866 CPU_STATS_STATE_RES)) == 0 &&
867 sigint == 0)
868 sched_yield();
869
870 total += stats[i].cd_packets;
871 }
872
873 if (total > orig)
874 delta_correction = -1 * ((long long) total - orig);
875 if (total < orig)
876 delta_correction = +1 * ((long long) orig - total);
877
878 for (cpu_sel = -1, i = 0; i < ctx->cpus; i++) {
879 if (stats[i].cd_packets > 0) {
880 if ((long long) stats[i].cd_packets +
881 delta_correction >= 0) {
882 cpu_sel = i;
883 break;
884 }
885 }
886 }
887
888 if ((int) cpu == cpu_sel)
889 ctx->num += delta_correction;
890 }
891
892 static void __set_state_cf(unsigned int cpu, unsigned long p, unsigned long b,
893 sig_atomic_t s)
894 {
895 stats[cpu].cf_packets = p;
896 stats[cpu].cf_bytes = b;
897 stats[cpu].state = s;
898 }
899
900 static void __set_state_cd(unsigned int cpu, unsigned long p, sig_atomic_t s)
901 {
902 stats[cpu].cd_packets = p;
903 stats[cpu].state = s;
904 }
905
906 static void xmit_packet_precheck(struct ctx *ctx, unsigned int cpu)
907 {
908 unsigned long plen_total, orig = ctx->num;
909 size_t total_len = 0;
910 unsigned int i;
911
912 bug_on(plen != dlen);
913
914 for (i = 0; i < plen; ++i)
915 total_len += packets[i].len;
916
917 __set_state_cf(cpu, plen, total_len, CPU_STATS_STATE_CFG);
918 plen_total = __wait_and_sum_others(ctx, cpu);
919
920 if (orig > 0) {
921 ctx->num = (unsigned long) round((1.0 * plen / plen_total) * orig);
922
923 __set_state_cd(cpu, ctx->num, CPU_STATS_STATE_CHK |
924 CPU_STATS_STATE_CFG);
925 __correct_global_delta(ctx, cpu, orig);
926 }
927
928 if (plen == 0) {
929 __set_state(cpu, CPU_STATS_STATE_RES);
930 return;
931 }
932 }
933
934 static void pcap_load_packets(struct dev_io *dev)
935 {
936 struct packet *pkt;
937
938 while ((pkt = dev_io_read(dev)) != 0)
939 /* nothing to do */;
940 }
941
942 static void main_loop(struct ctx *ctx, char *confname, bool slow,
943 unsigned int cpu, bool invoke_cpp, char **cpp_argv,
944 unsigned long orig_num)
945 {
946 if (ctx->dev_in && dev_io_is_pcap(ctx->dev_in)) {
947 pcap_load_packets(ctx->dev_in);
948 shaper_set_tstamp(&ctx->sh, &packets[0].tstamp);
949 ctx->num = plen;
950 } else {
951 if (ctx->packet_str)
952 compile_packets_str(ctx->packet_str, ctx->verbose, cpu);
953 else
954 compile_packets(confname, ctx->verbose, cpu, invoke_cpp, cpp_argv);
955
956 preprocess_packets();
957 }
958
959 xmit_packet_precheck(ctx, cpu);
960
961 if (cpu == 0) {
962 unsigned int i;
963 size_t total_len = 0, total_pkts = 0;
964
965 for (i = 0; i < ctx->cpus; ++i) {
966 total_len += stats[i].cf_bytes;
967 total_pkts += stats[i].cf_packets;
968 }
969
970 printf("%6zu packets to schedule\n", total_pkts);
971 printf("%6zu bytes in total\n", total_len);
972 printf("Running! Hang up with ^C!\n\n");
973 fflush(stdout);
974 }
975
976 dev_io_open(ctx->dev_out);
977 if (dev_io_is_netdev(ctx->dev_out) && ctx->qdisc_path == false)
978 set_sock_qdisc_bypass(dev_io_fd_get(ctx->dev_out), ctx->verbose);
979
980 if (slow)
981 xmit_slowpath_or_die(ctx, cpu, orig_num);
982 else
983 xmit_fastpath_or_die(ctx, cpu, orig_num);
984
985 dev_io_close(ctx->dev_out);
986 if (ctx->dev_in)
987 dev_io_close(ctx->dev_in);
988
989 cleanup_packets();
990 }
991
992 static unsigned int generate_srand_seed(void)
993 {
994 int fd;
995 unsigned int _seed;
996
997 fd = open("/dev/urandom", O_RDONLY);
998 if (fd < 0)
999 return time(NULL);
1000
1001 read_or_die(fd, &_seed, sizeof(_seed));
1002
1003 close(fd);
1004 return _seed;
1005 }
1006
1007 static void on_panic_del_rfmon(void *arg)
1008 {
1009 dev_io_close(arg);
1010 }
1011
1012 int main(int argc, char **argv)
1013 {
1014 bool slow = false, invoke_cpp = false, reseed = true, cpustats = true;
1015 bool prio_high = false, set_irq_aff = true, set_sock_mem = true;
1016 int c, vals[4] = {0}, irq;
1017 uint64_t gap = 0;
1018 unsigned int i;
1019 char *confname = NULL, *ptr;
1020 unsigned long cpus_tmp, orig_num = 0;
1021 unsigned long long tx_packets, tx_bytes;
1022 struct ctx ctx;
1023 int min_opts = 5;
1024 char **cpp_argv = NULL;
1025 size_t cpp_argc = 0;
1026 unsigned long long rate;
1027 enum shaper_type shape_type;
1028 struct timespec delay;
1029
1030 memset(&ctx, 0, sizeof(ctx));
1031 ctx.cpus = get_number_cpus_online();
1032 ctx.uid = getuid();
1033 ctx.gid = getgid();
1034 ctx.qdisc_path = false;
1035
1036 /* Keep an initial small default size to reduce cache-misses. */
1037 ctx.reserve_size = 512 * (1 << 10);
1038
1039 while ((c = getopt_long(argc, argv, short_options, long_options,
1040 NULL)) != EOF) {
1041 switch (c) {
1042 case 'h':
1043 help();
1044 break;
1045 case 'v':
1046 version();
1047 break;
1048 case 'C':
1049 cpustats = false;
1050 break;
1051 case 'e':
1052 example();
1053 break;
1054 case 'p':
1055 invoke_cpp = true;
1056 break;
1057 case 'D':
1058 cpp_argv = argv_insert(cpp_argv, &cpp_argc, "-D");
1059 cpp_argv = argv_insert(cpp_argv, &cpp_argc, optarg);
1060 break;
1061 case 'V':
1062 ctx.verbose = true;
1063 break;
1064 case 'P':
1065 cpus_tmp = strtoul(optarg, NULL, 0);
1066 if (cpus_tmp > 0 && cpus_tmp < ctx.cpus)
1067 ctx.cpus = cpus_tmp;
1068 break;
1069 case 'd':
1070 case 'o':
1071 ctx.device = xstrdup(optarg);
1072 break;
1073 case 'H':
1074 prio_high = true;
1075 break;
1076 case 'A':
1077 set_sock_mem = false;
1078 break;
1079 case 'Q':
1080 set_irq_aff = false;
1081 break;
1082 case 'q':
1083 ctx.qdisc_path = true;
1084 break;
1085 case 'r':
1086 ctx.rand = true;
1087 break;
1088 case 's':
1089 slow = true;
1090 ctx.cpus = 1;
1091 ctx.smoke_test = true;
1092 ctx.rhost = xstrdup(optarg);
1093 break;
1094 case 'R':
1095 ctx.rfraw = true;
1096 break;
1097 case 'J':
1098 ctx.jumbo_support = true;
1099 break;
1100 case 'c':
1101 case 'i':
1102 confname = xstrdup(optarg);
1103 if (c == 'i' && strstr(confname, ".pcap")) {
1104 ctx.sh.type = SHAPER_TSTAMP;
1105 ctx.pcap_in = confname;
1106 } else if (!strncmp("-", confname, strlen("-")))
1107 ctx.cpus = 1;
1108 break;
1109 case 'u':
1110 ctx.uid = strtoul(optarg, NULL, 0);
1111 ctx.enforce = true;
1112 break;
1113 case 'g':
1114 ctx.gid = strtoul(optarg, NULL, 0);
1115 ctx.enforce = true;
1116 break;
1117 case 'k':
1118 printf("Option -k/--kernel-pull is no longer used and "
1119 "will be removed in a future release!\n");
1120 break;
1121 case 'E':
1122 seed = strtoul(optarg, NULL, 0);
1123 reseed = false;
1124 break;
1125 case 'n':
1126 orig_num = strtoul(optarg, NULL, 0);
1127 ctx.num = orig_num;
1128 break;
1129 case 't':
1130 gap = strtoul(optarg, &ptr, 0);
1131 if (!gap && optarg == ptr)
1132 panic("Invalid gap param\n");
1133
1134 if (!strncmp(ptr, "ns", strlen("ns"))) {
1135 delay.tv_sec = gap / 1000000000;
1136 delay.tv_nsec = gap % 1000000000;
1137 } else if (*ptr == '\0' || !strncmp(ptr, "us", strlen("us"))) {
1138 /* Default to microseconds for backwards
1139 * compatibility if no postfix is given.
1140 */
1141 delay.tv_sec = gap / 1000000;
1142 delay.tv_nsec = (gap % 1000000) * 1000;
1143 } else if (!strncmp(ptr, "ms", strlen("ms"))) {
1144 delay.tv_sec = gap / 1000;
1145 delay.tv_nsec = (gap % 1000) * 1000000;
1146 } else if (!strncmp(ptr, "s", strlen("s"))) {
1147 delay.tv_sec = gap;
1148 delay.tv_nsec = 0;
1149 } else {
1150 panic("Syntax error in time param!\n");
1151 }
1152
1153 shaper_set_delay(&ctx.sh, delay.tv_sec, delay.tv_nsec);
1154 break;
1155 case 'b':
1156 rate = strtoul(optarg, &ptr, 0);
1157 if (!rate && optarg == ptr)
1158 panic("Invalid rate param\n");
1159
1160 if (strncmp(ptr, "pps", strlen("pps")) == 0) {
1161 shape_type = SHAPER_PKTS;
1162 } else if (strncmp(ptr, "B", strlen("B")) == 0) {
1163 shape_type = SHAPER_BYTES;
1164 } else if (strncmp(ptr, "kB", strlen("kB")) == 0) {
1165 shape_type = SHAPER_BYTES;
1166 rate *= 1000;
1167 } else if (strncmp(ptr, "MB", strlen("MB")) == 0) {
1168 shape_type = SHAPER_BYTES;
1169 rate *= 1000 * 1000;
1170 } else if (strncmp(ptr, "GB", strlen("GB")) == 0) {
1171 shape_type = SHAPER_BYTES;
1172 rate *= 1000 * 1000 * 1000;
1173 } else if (strncmp(ptr, "kbit", strlen("kbit")) == 0) {
1174 shape_type = SHAPER_BYTES;
1175 rate *= 1000 / 8;
1176 } else if (strncmp(ptr, "Mbit", strlen("Mbit")) == 0) {
1177 shape_type = SHAPER_BYTES;
1178 rate *= 1000 * 1000 / 8;
1179 } else if (strncmp(ptr, "Gbit", strlen("Gbit")) == 0) {
1180 shape_type = SHAPER_BYTES;
1181 rate *= 1000 * 1000 * 1000 / 8;
1182 } else if (strncmp(ptr, "KiB", strlen("KiB")) == 0) {
1183 shape_type = SHAPER_BYTES;
1184 rate *= 1 << 10;
1185 } else if (strncmp(ptr, "MiB", strlen("MiB")) == 0) {
1186 shape_type = SHAPER_BYTES;
1187 rate *= 1 << 20;
1188 } else if (strncmp(ptr, "GiB", strlen("GiB")) == 0) {
1189 shape_type = SHAPER_BYTES;
1190 rate *= 1 << 30;
1191 } else if (!rate) {
1192 shape_type = SHAPER_NONE;
1193 } else {
1194 panic("Invalid unit type for rate\n");
1195 }
1196
1197 shaper_set_rate(&ctx.sh, rate, shape_type);
1198 break;
1199 case 'S':
1200 ctx.reserve_size = strtoul(optarg, &ptr, 0);
1201 if (ctx.reserve_size == 0 && ptr == optarg)
1202 panic("Invalid ring size param\n");
1203
1204 if (!strncmp(ptr, "KiB", strlen("KiB")))
1205 ctx.reserve_size *= 1 << 10;
1206 else if (!strncmp(ptr, "MiB", strlen("MiB")))
1207 ctx.reserve_size = 1 << 20;
1208 else if (!strncmp(ptr, "GiB", strlen("GiB")))
1209 ctx.reserve_size *= 1 << 30;
1210 else
1211 panic("Invalid ring size unit type\n");
1212
1213 break;
1214 case '?':
1215 switch (optopt) {
1216 case 'd':
1217 case 'c':
1218 case 'n':
1219 case 'S':
1220 case 's':
1221 case 'P':
1222 case 'o':
1223 case 'E':
1224 case 'i':
1225 case 'k':
1226 case 'u':
1227 case 'g':
1228 case 't':
1229 panic("Option -%c requires an argument!\n",
1230 optopt);
1231 default:
1232 if (isprint(optopt))
1233 printf("Unknown option character `0x%X\'!\n", optopt);
1234 die();
1235 }
1236 default:
1237 break;
1238 }
1239 }
1240
1241 if (argc >= optind) {
1242 min_opts = 4;
1243 ctx.packet_str = argv2str(optind, argc, argv);
1244 }
1245
1246 if (argc < min_opts)
1247 help();
1248 if (ctx.device == NULL)
1249 panic("No networking device given!\n");
1250 if (confname == NULL && !ctx.packet_str)
1251 panic("No configuration file or packet string given!\n");
1252
1253 register_signal(SIGINT, signal_handler);
1254 register_signal(SIGQUIT, signal_handler);
1255 register_signal(SIGTERM, signal_handler);
1256 register_signal(SIGHUP, signal_handler);
1257
1258 if (prio_high) {
1259 set_proc_prio(-20);
1260 set_sched_status(SCHED_FIFO, sched_get_priority_max(SCHED_FIFO));
1261 }
1262
1263 if (set_sock_mem)
1264 set_system_socket_memory(vals, array_size(vals));
1265 xlockme();
1266
1267 if (ctx.pcap_in) {
1268 ctx.dev_in = dev_io_create(ctx.pcap_in, DEV_IO_IN);
1269 if (!ctx.dev_in)
1270 panic("Failed to open input device\n");
1271 dev_io_open(ctx.dev_in);
1272 }
1273
1274 ctx.dev_out = dev_io_create(ctx.device, DEV_IO_OUT);
1275 if (!ctx.dev_out)
1276 panic("Failed to open output device\n");
1277
1278 if (ctx.rfraw) {
1279 if (dev_io_link_type_set(ctx.dev_out, LINKTYPE_IEEE802_11_RADIOTAP))
1280 panic("Failed to setup rfraw device\n");
1281
1282 panic_handler_add(on_panic_del_rfmon, ctx.dev_out);
1283 }
1284
1285 protos_init(ctx.dev_out);
1286
1287 if (shaper_is_set(&ctx.sh) || (ctx.dev_in && !dev_io_is_netdev(ctx.dev_in))
1288 || !dev_io_is_netdev(ctx.dev_out)) {
1289
1290 prctl(PR_SET_TIMERSLACK, 1UL);
1291 /* Fall back to single core to not mess up correct timing.
1292 * We are slow anyway!
1293 */
1294 ctx.cpus = 1;
1295 slow = true;
1296 }
1297
1298 /*
1299 * If number of packets is smaller than number of CPUs use only as
1300 * many CPUs as there are packets. Otherwise we end up sending more
1301 * packets than intended or none at all.
1302 */
1303 if (ctx.num)
1304 ctx.cpus = min_t(unsigned int, ctx.num, ctx.cpus);
1305
1306 if (set_irq_aff && dev_io_is_netdev(ctx.dev_out)) {
1307 irq = device_irq_number(ctx.device);
1308 device_set_irq_affinity_list(irq, 0, ctx.cpus - 1);
1309 }
1310
1311 stats = setup_shared_var(ctx.cpus);
1312
1313 for (i = 0; i < ctx.cpus; i++) {
1314 pid_t pid = fork();
1315
1316 switch (pid) {
1317 case 0:
1318 if (reseed)
1319 seed = generate_srand_seed();
1320 srand(seed);
1321
1322 cpu_affinity(i);
1323 main_loop(&ctx, confname, slow, i, invoke_cpp,
1324 cpp_argv, orig_num);
1325
1326 goto thread_out;
1327 case -1:
1328 panic("Cannot fork processes!\n");
1329 }
1330 }
1331
1332 for (i = 0; i < ctx.cpus; i++) {
1333 int status;
1334
1335 wait(&status);
1336 if (WEXITSTATUS(status) == EXIT_FAILURE)
1337 die();
1338 }
1339
1340 if (set_sock_mem)
1341 reset_system_socket_memory(vals, array_size(vals));
1342
1343 for (i = 0, tx_packets = tx_bytes = 0; i < ctx.cpus; i++) {
1344 while ((__get_state(i) & CPU_STATS_STATE_RES) == 0)
1345 sched_yield();
1346
1347 tx_packets += stats[i].tx_packets;
1348 tx_bytes += stats[i].tx_bytes;
1349 }
1350
1351 fflush(stdout);
1352 printf("\n");
1353 printf("\r%12llu packets outgoing\n", tx_packets);
1354 printf("\r%12llu bytes outgoing\n", tx_bytes);
1355 for (i = 0; cpustats && i < ctx.cpus; i++) {
1356 printf("\r%12lu sec, %lu usec on CPU%d (%llu packets)\n",
1357 stats[i].tv_sec, stats[i].tv_usec, i,
1358 stats[i].tx_packets);
1359 }
1360
1361 thread_out:
1362 xunlockme();
1363 destroy_shared_var(stats, ctx.cpus);
1364 if (dev_io_is_netdev(ctx.dev_out) && set_irq_aff)
1365 device_restore_irq_affinity_list();
1366
1367 argv_free(cpp_argv);
1368 free(ctx.device);
1369 free(ctx.rhost);
1370 free(confname);
1371 free(ctx.packet_str);
1372
1373 return 0;
1374 }
netsniff-ng toolkit, the packet sniffing beast, staging tree