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mausezahn: Fix IPv6 address comparison
[netsniff-ng.git] / trafgen.c
blobd9e0e0e2057b84deb78db32a52119d9cf608c4bd
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 default:
380 bug();
381 break;
382 }
383
384 memcpy(&packets[id].payload[csum->off], &sum, sizeof(sum));
385 }
386 }
387
388 static void preprocess_packets(void)
389 {
390 size_t i;
391
392 for (i = 0; i < plen; i++) {
393 struct packet_dyn *pktd = &packet_dyn[i];
394
395 if (packet_dyn_has_only_csums(pktd)) {
396 apply_csum16(i);
397 pktd->slen = 0;
398 xfree(pktd->csum);
399 }
400 }
401 }
402
403 static struct cpu_stats *setup_shared_var(unsigned int cpus)
404 {
405 int fd;
406 size_t len = cpus * sizeof(struct cpu_stats);
407 char *zbuff, file[256];
408 struct cpu_stats *buff;
409
410 slprintf(file, sizeof(file), ".tmp_mmap.XXXXXX");
411 fd = mkostemp_or_die(file, O_RDWR | O_CREAT | O_TRUNC);
412 zbuff = xzmalloc(len);
413 write_or_die(fd, zbuff, len);
414 xfree(zbuff);
415
416 buff = mmap(NULL, len, PROT_READ | PROT_WRITE,
417 MAP_SHARED, fd, 0);
418 if (buff == MAP_FAILED)
419 panic("Cannot setup shared variable!\n");
420
421 close(fd);
422 unlink(file);
423
424 memset(buff, 0, len);
425 return buff;
426 }
427
428 static void destroy_shared_var(void *buff, unsigned int cpus)
429 {
430 munmap(buff, cpus * sizeof(struct cpu_stats));
431 }
432
433 static void dump_trafgen_snippet(uint8_t *payload, size_t len)
434 {
435 size_t i;
436
437 printf("{");
438 for (i = 0; i < len; ++i) {
439 if (i % 15 == 0)
440 printf("\n ");
441 printf("0x%02x, ", payload[i]);
442 }
443 printf("\n}\n");
444 fflush(stdout);
445 }
446
447 static int xmit_smoke_setup(struct ctx *ctx)
448 {
449 int icmp_sock, ret, ttl = 64;
450 struct icmp_filter filter;
451
452 icmp_sock = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
453 if (icmp_sock < 0)
454 panic("Cannot get a ICMP socket: %s!\n", strerror(errno));
455
456 filter.data = ~(1 << ICMP_ECHOREPLY);
457
458 ret = setsockopt(icmp_sock, SOL_RAW, ICMP_FILTER, &filter, sizeof(filter));
459 if (ret < 0)
460 panic("Cannot install filter!\n");
461
462 ret = setsockopt(icmp_sock, SOL_IP, IP_TTL, &ttl, sizeof(ttl));
463 if (ret < 0)
464 panic("Cannot set TTL!\n");
465
466 memset(&ctx->dest, 0, sizeof(ctx->dest));
467 ctx->dest.sin_family = AF_INET;
468 ctx->dest.sin_port = 0;
469
470 ret = inet_aton(ctx->rhost, &ctx->dest.sin_addr);
471 if (ret < 0)
472 panic("Cannot resolve address!\n");
473
474 return icmp_sock;
475 }
476
477 static int xmit_smoke_probe(int icmp_sock, struct ctx *ctx)
478 {
479 int ret;
480 unsigned int i, j;
481 short ident, cnt = 1, idstore[SMOKE_N_PROBES];
482 uint8_t outpack[512], *data;
483 struct icmphdr *icmp;
484 struct iphdr *ip;
485 size_t len = sizeof(*icmp) + 56;
486 struct sockaddr_in from;
487 socklen_t from_len;
488 struct pollfd fds = {
489 .fd = icmp_sock,
490 .events = POLLIN,
491 };
492
493 memset(idstore, 0, sizeof(idstore));
494 for (j = 0; j < SMOKE_N_PROBES; j++) {
495 while ((ident = htons((short) rand())) == 0)
496 sleep(0);
497 idstore[j] = ident;
498
499 memset(outpack, 0, sizeof(outpack));
500 icmp = (void *) outpack;
501 icmp->type = ICMP_ECHO;
502 icmp->un.echo.id = ident;
503 icmp->un.echo.sequence = htons(cnt++);
504
505 data = ((uint8_t *) outpack + sizeof(*icmp));
506 for (i = 0; i < 56; ++i)
507 data[i] = (uint8_t) rand();
508
509 icmp->checksum = csum((unsigned short *) outpack,
510 len / sizeof(unsigned short));
511
512 ret = sendto(icmp_sock, outpack, len, MSG_DONTWAIT,
513 (struct sockaddr *) &ctx->dest, sizeof(ctx->dest));
514 if (unlikely(ret != (int) len))
515 panic("Cannot send out probe: %s!\n", strerror(errno));
516
517 ret = poll(&fds, 1, 50);
518 if (ret < 0)
519 panic("Poll failed!\n");
520
521 if (fds.revents & POLLIN) {
522 ret = recvfrom(icmp_sock, outpack, sizeof(outpack), 0,
523 (struct sockaddr *) &from, &from_len);
524 if (unlikely(ret <= 0))
525 panic("Probe receive failed!\n");
526 if (unlikely(from_len != sizeof(ctx->dest)))
527 continue;
528 if (unlikely(memcmp(&from, &ctx->dest, sizeof(ctx->dest))))
529 continue;
530 if (unlikely((size_t) ret < sizeof(*ip) + sizeof(*icmp)))
531 continue;
532 ip = (void *) outpack;
533 if (unlikely(ip->ihl * 4 + sizeof(*icmp) > (size_t) ret))
534 continue;
535 icmp = (void *) outpack + ip->ihl * 4;
536 for (i = 0; i < array_size(idstore); ++i) {
537 if (unlikely(icmp->un.echo.id != idstore[i]))
538 continue;
539 return 0;
540 }
541 }
542 }
543
544 return -1;
545 }
546
547 static bool shaper_is_set(struct shaper *sh)
548 {
549 return sh->type != SHAPER_NONE;
550 }
551
552 static void shaper_init(struct shaper *sh)
553 {
554 if (sh->type == SHAPER_NONE || sh->type == SHAPER_DELAY)
555 return;
556
557 memset(&sh->delay, 0, sizeof(struct timespec));
558 bug_on(gettimeofday(&sh->start, NULL));
559 sh->sent = 0;
560 }
561
562 static void shaper_set_delay(struct shaper *sh, time_t sec, long int ns)
563 {
564 if (!(sec | ns)) {
565 sh->type = SHAPER_NONE;
566 return;
567 }
568
569 sh->type = SHAPER_DELAY;
570 sh->delay.tv_sec = sec;
571 sh->delay.tv_nsec = ns;
572 }
573
574 static void shaper_set_rate(struct shaper *sh, unsigned long long rate,
575 enum shaper_type type)
576 {
577 memset(sh, 0, sizeof(struct shaper));
578 sh->rate = rate;
579 sh->type = type;
580 }
581
582 static void shaper_set_tstamp(struct shaper *sh, struct timespec *ts)
583 {
584 TIMESPEC_TO_TIMEVAL(&sh->tstamp, ts);
585 }
586
587 static void shaper_delay(struct shaper *sh, struct packet *pkt)
588 {
589 if (sh->type == SHAPER_BYTES || sh->type == SHAPER_PKTS) {
590 unsigned long pkt_len = pkt->len;
591
592 sh->sent += sh->type == SHAPER_BYTES ? pkt_len : 1;
593
594 if (sh->sent >= sh->rate && sh->rate > 0) {
595 struct timeval delay_us;
596 struct timeval time_sent;
597 struct timeval time_1s = { .tv_sec = 1 };
598
599 bug_on(gettimeofday(&sh->end, NULL));
600 timersub(&sh->end, &sh->start, &time_sent);
601
602 if (timercmp(&time_1s, &time_sent, > )) {
603 timersub(&time_1s, &time_sent, &delay_us);
604 TIMEVAL_TO_TIMESPEC(&delay_us, &sh->delay);
605 }
606 }
607 } else if (sh->type == SHAPER_TSTAMP) {
608 struct timeval tstamp;
609 struct timeval pkt_diff;
610 struct timeval diff;
611
612 bug_on(gettimeofday(&sh->end, NULL));
613 TIMESPEC_TO_TIMEVAL(&tstamp, &pkt->tstamp);
614 timersub(&sh->end, &sh->start, &diff);
615 timersub(&tstamp, &sh->tstamp, &pkt_diff);
616
617 if (timercmp(&diff, &pkt_diff, <)) {
618 struct timeval delay;
619
620 timersub(&pkt_diff, &diff, &delay);
621 TIMEVAL_TO_TIMESPEC(&delay, &sh->delay);
622 }
623
624 memcpy(&sh->tstamp, &tstamp, sizeof(sh->tstamp));
625 }
626
627 if ((sh->delay.tv_sec | sh->delay.tv_nsec) > 0) {
628 nanosleep(&sh->delay, NULL);
629
630 shaper_init(sh);
631 }
632 }
633
634 static inline void packet_apply_dyn_elements(int idx)
635 {
636 if (packet_dyn_has_elems(&packet_dyn[idx])) {
637 apply_counter(idx);
638 apply_randomizer(idx);
639 apply_csum16(idx);
640 }
641
642 if (packet_dyn_has_fields(&packet_dyn[idx])) {
643 uint32_t i;
644
645 for (i = 0; i < packet_dyn[idx].flen; i++)
646 proto_field_dyn_apply(packet_dyn[idx].fields[i]);
647
648 proto_packet_update(idx);
649 }
650 }
651
652 static void xmit_slowpath_or_die(struct ctx *ctx, unsigned int cpu, unsigned long orig_num)
653 {
654 int ret, icmp_sock = -1;
655 unsigned long num = 1, i = 0;
656 struct timeval start, end, diff;
657 unsigned long long tx_bytes = 0, tx_packets = 0;
658
659 if (ctx->num > 0)
660 num = ctx->num;
661 if (ctx->num == 0 && orig_num > 0)
662 num = 0;
663
664 if (ctx->smoke_test)
665 icmp_sock = xmit_smoke_setup(ctx);
666
667 drop_privileges(ctx->enforce, ctx->uid, ctx->gid);
668
669 bug_on(gettimeofday(&start, NULL));
670
671 if (shaper_is_set(&ctx->sh))
672 shaper_init(&ctx->sh);
673
674 while (likely(sigint == 0 && num > 0 && plen > 0)) {
675 packet_apply_dyn_elements(i);
676 retry:
677 ret = dev_io_write(ctx->dev_out, &packets[i]);
678 if (unlikely(ret < 0)) {
679 if (errno == ENOBUFS) {
680 sched_yield();
681 goto retry;
682 }
683 if (ctx->smoke_test)
684 panic("Sendto error: %s!\n", strerror(errno));
685 }
686
687 tx_bytes += packets[i].len;
688 tx_packets++;
689
690 if (ctx->smoke_test) {
691 ret = xmit_smoke_probe(icmp_sock, ctx);
692 if (unlikely(ret < 0)) {
693 printf("%sSmoke test alert:%s\n", colorize_start(bold), colorize_end());
694 printf(" Remote host seems to be unresponsive to ICMP probes!\n");
695 printf(" Last instance was packet%lu, seed:%u, trafgen snippet:\n\n",
696 i, seed);
697
698 dump_trafgen_snippet(packets[i].payload, packets[i].len);
699 break;
700 }
701 }
702
703 if (!ctx->rand) {
704 i++;
705 if (i >= plen)
706 i = 0;
707 } else
708 i = rand() % plen;
709
710 if (ctx->num > 0)
711 num--;
712
713 if (shaper_is_set(&ctx->sh))
714 shaper_delay(&ctx->sh, &packets[i]);
715 }
716
717 bug_on(gettimeofday(&end, NULL));
718 timersub(&end, &start, &diff);
719
720 if (ctx->smoke_test)
721 close(icmp_sock);
722
723 stats[cpu].tx_packets = tx_packets;
724 stats[cpu].tx_bytes = tx_bytes;
725 stats[cpu].tv_sec = diff.tv_sec;
726 stats[cpu].tv_usec = diff.tv_usec;
727
728 stats[cpu].state |= CPU_STATS_STATE_RES;
729 }
730
731 static void xmit_fastpath_or_die(struct ctx *ctx, unsigned int cpu, unsigned long orig_num)
732 {
733 int ifindex = dev_io_ifindex_get(ctx->dev_out);
734 uint8_t *out = NULL;
735 unsigned int it = 0, retry = 100;
736 unsigned long num = 1, i = 0;
737 size_t size = ring_size(dev_io_name_get(ctx->dev_out), ctx->reserve_size);
738 struct ring tx_ring;
739 struct frame_map *hdr;
740 struct timeval start, end, diff;
741 unsigned long long tx_bytes = 0, tx_packets = 0;
742 int sock = dev_io_fd_get(ctx->dev_out);
743
744 set_sock_prio(sock, 512);
745
746 ring_tx_setup(&tx_ring, sock, size, ifindex, ctx->jumbo_support, ctx->verbose);
747
748 drop_privileges(ctx->enforce, ctx->uid, ctx->gid);
749
750 if (ctx->num > 0)
751 num = ctx->num;
752 if (ctx->num == 0 && orig_num > 0)
753 num = 0;
754
755 bug_on(gettimeofday(&start, NULL));
756
757 while (likely(sigint == 0 && num > 0 && plen > 0)) {
758 if (!user_may_pull_from_tx(tx_ring.frames[it].iov_base)) {
759 int ret = pull_and_flush_tx_ring(sock);
760 if (unlikely(ret < 0)) {
761 /* We could hit EBADF if the socket has been closed before
762 * the timer was triggered.
763 */
764 if (errno != EBADF && errno != ENOBUFS)
765 panic("Flushing TX_RING failed: %s!\n", strerror(errno));
766 }
767
768 continue;
769 }
770
771 hdr = tx_ring.frames[it].iov_base;
772 out = ((uint8_t *) hdr) + TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);
773
774 hdr->tp_h.tp_snaplen = packets[i].len;
775 hdr->tp_h.tp_len = packets[i].len;
776
777 packet_apply_dyn_elements(i);
778
779 memcpy(out, packets[i].payload, packets[i].len);
780
781 tx_bytes += packets[i].len;
782 tx_packets++;
783
784 if (!ctx->rand) {
785 i++;
786 if (i >= plen)
787 i = 0;
788 } else
789 i = rand() % plen;
790
791 kernel_may_pull_from_tx(&hdr->tp_h);
792
793 it++;
794 if (it >= tx_ring.layout.tp_frame_nr)
795 it = 0;
796
797 if (ctx->num > 0)
798 num--;
799 }
800
801 bug_on(gettimeofday(&end, NULL));
802 timersub(&end, &start, &diff);
803
804 while (pull_and_flush_tx_ring_wait(sock) < 0 && errno == ENOBUFS && retry-- > 0)
805 usleep(10000);
806 destroy_tx_ring(sock, &tx_ring);
807
808 stats[cpu].tx_packets = tx_packets;
809 stats[cpu].tx_bytes = tx_bytes;
810 stats[cpu].tv_sec = diff.tv_sec;
811 stats[cpu].tv_usec = diff.tv_usec;
812
813 stats[cpu].state |= CPU_STATS_STATE_RES;
814 }
815
816 static inline void __set_state(unsigned int cpu, sig_atomic_t s)
817 {
818 stats[cpu].state = s;
819 }
820
821 static inline sig_atomic_t __get_state(unsigned int cpu)
822 {
823 return stats[cpu].state;
824 }
825
826 static unsigned long __wait_and_sum_others(struct ctx *ctx, unsigned int cpu)
827 {
828 unsigned int i;
829 unsigned long total;
830
831 for (i = 0, total = plen; i < ctx->cpus; i++) {
832 if (i == cpu)
833 continue;
834
835 while ((__get_state(i) &
836 (CPU_STATS_STATE_CFG |
837 CPU_STATS_STATE_RES)) == 0 &&
838 sigint == 0)
839 sched_yield();
840
841 total += stats[i].cf_packets;
842 }
843
844 return total;
845 }
846
847 static void __correct_global_delta(struct ctx *ctx, unsigned int cpu, unsigned long orig)
848 {
849 unsigned int i;
850 unsigned long total;
851 int cpu_sel;
852 long long delta_correction = 0;
853
854 for (i = 0, total = ctx->num; i < ctx->cpus; i++) {
855 if (i == cpu)
856 continue;
857
858 while ((__get_state(i) &
859 (CPU_STATS_STATE_CHK |
860 CPU_STATS_STATE_RES)) == 0 &&
861 sigint == 0)
862 sched_yield();
863
864 total += stats[i].cd_packets;
865 }
866
867 if (total > orig)
868 delta_correction = -1 * ((long long) total - orig);
869 if (total < orig)
870 delta_correction = +1 * ((long long) orig - total);
871
872 for (cpu_sel = -1, i = 0; i < ctx->cpus; i++) {
873 if (stats[i].cd_packets > 0) {
874 if ((long long) stats[i].cd_packets +
875 delta_correction >= 0) {
876 cpu_sel = i;
877 break;
878 }
879 }
880 }
881
882 if ((int) cpu == cpu_sel)
883 ctx->num += delta_correction;
884 }
885
886 static void __set_state_cf(unsigned int cpu, unsigned long p, unsigned long b,
887 sig_atomic_t s)
888 {
889 stats[cpu].cf_packets = p;
890 stats[cpu].cf_bytes = b;
891 stats[cpu].state = s;
892 }
893
894 static void __set_state_cd(unsigned int cpu, unsigned long p, sig_atomic_t s)
895 {
896 stats[cpu].cd_packets = p;
897 stats[cpu].state = s;
898 }
899
900 static void xmit_packet_precheck(struct ctx *ctx, unsigned int cpu)
901 {
902 unsigned long plen_total, orig = ctx->num;
903 size_t total_len = 0;
904 unsigned int i;
905
906 bug_on(plen != dlen);
907
908 for (i = 0; i < plen; ++i)
909 total_len += packets[i].len;
910
911 __set_state_cf(cpu, plen, total_len, CPU_STATS_STATE_CFG);
912 plen_total = __wait_and_sum_others(ctx, cpu);
913
914 if (orig > 0) {
915 ctx->num = (unsigned long) round((1.0 * plen / plen_total) * orig);
916
917 __set_state_cd(cpu, ctx->num, CPU_STATS_STATE_CHK |
918 CPU_STATS_STATE_CFG);
919 __correct_global_delta(ctx, cpu, orig);
920 }
921
922 if (plen == 0) {
923 __set_state(cpu, CPU_STATS_STATE_RES);
924 return;
925 }
926 }
927
928 static void pcap_load_packets(struct dev_io *dev)
929 {
930 struct packet *pkt;
931
932 while ((pkt = dev_io_read(dev)) != 0)
933 /* nothing to do */;
934 }
935
936 static void main_loop(struct ctx *ctx, char *confname, bool slow,
937 unsigned int cpu, bool invoke_cpp, char **cpp_argv,
938 unsigned long orig_num)
939 {
940 if (ctx->dev_in && dev_io_is_pcap(ctx->dev_in)) {
941 pcap_load_packets(ctx->dev_in);
942 shaper_set_tstamp(&ctx->sh, &packets[0].tstamp);
943 ctx->num = plen;
944 } else {
945 if (ctx->packet_str)
946 compile_packets_str(ctx->packet_str, ctx->verbose, cpu);
947 else
948 compile_packets(confname, ctx->verbose, cpu, invoke_cpp, cpp_argv);
949
950 preprocess_packets();
951 }
952
953 xmit_packet_precheck(ctx, cpu);
954
955 if (cpu == 0) {
956 unsigned int i;
957 size_t total_len = 0, total_pkts = 0;
958
959 for (i = 0; i < ctx->cpus; ++i) {
960 total_len += stats[i].cf_bytes;
961 total_pkts += stats[i].cf_packets;
962 }
963
964 printf("%6zu packets to schedule\n", total_pkts);
965 printf("%6zu bytes in total\n", total_len);
966 printf("Running! Hang up with ^C!\n\n");
967 fflush(stdout);
968 }
969
970 dev_io_open(ctx->dev_out);
971 if (dev_io_is_netdev(ctx->dev_out) && ctx->qdisc_path == false)
972 set_sock_qdisc_bypass(dev_io_fd_get(ctx->dev_out), ctx->verbose);
973
974 if (slow)
975 xmit_slowpath_or_die(ctx, cpu, orig_num);
976 else
977 xmit_fastpath_or_die(ctx, cpu, orig_num);
978
979 dev_io_close(ctx->dev_out);
980 if (ctx->dev_in)
981 dev_io_close(ctx->dev_in);
982
983 cleanup_packets();
984 }
985
986 static unsigned int generate_srand_seed(void)
987 {
988 int fd;
989 unsigned int _seed;
990
991 fd = open("/dev/urandom", O_RDONLY);
992 if (fd < 0)
993 return time(NULL);
994
995 read_or_die(fd, &_seed, sizeof(_seed));
996
997 close(fd);
998 return _seed;
999 }
1000
1001 static void on_panic_del_rfmon(void *arg)
1002 {
1003 dev_io_close(arg);
1004 }
1005
1006 int main(int argc, char **argv)
1007 {
1008 bool slow = false, invoke_cpp = false, reseed = true, cpustats = true;
1009 bool prio_high = false, set_irq_aff = true, set_sock_mem = true;
1010 int c, vals[4] = {0}, irq;
1011 uint64_t gap = 0;
1012 unsigned int i;
1013 char *confname = NULL, *ptr;
1014 unsigned long cpus_tmp, orig_num = 0;
1015 unsigned long long tx_packets, tx_bytes;
1016 struct ctx ctx;
1017 int min_opts = 5;
1018 char **cpp_argv = NULL;
1019 size_t cpp_argc = 0;
1020 unsigned long long rate;
1021 enum shaper_type shape_type;
1022 struct timespec delay;
1023
1024 memset(&ctx, 0, sizeof(ctx));
1025 ctx.cpus = get_number_cpus_online();
1026 ctx.uid = getuid();
1027 ctx.gid = getgid();
1028 ctx.qdisc_path = false;
1029
1030 /* Keep an initial small default size to reduce cache-misses. */
1031 ctx.reserve_size = 512 * (1 << 10);
1032
1033 while ((c = getopt_long(argc, argv, short_options, long_options,
1034 NULL)) != EOF) {
1035 switch (c) {
1036 case 'h':
1037 help();
1038 break;
1039 case 'v':
1040 version();
1041 break;
1042 case 'C':
1043 cpustats = false;
1044 break;
1045 case 'e':
1046 example();
1047 break;
1048 case 'p':
1049 invoke_cpp = true;
1050 break;
1051 case 'D':
1052 cpp_argv = argv_insert(cpp_argv, &cpp_argc, "-D");
1053 cpp_argv = argv_insert(cpp_argv, &cpp_argc, optarg);
1054 break;
1055 case 'V':
1056 ctx.verbose = true;
1057 break;
1058 case 'P':
1059 cpus_tmp = strtoul(optarg, NULL, 0);
1060 if (cpus_tmp > 0 && cpus_tmp < ctx.cpus)
1061 ctx.cpus = cpus_tmp;
1062 break;
1063 case 'd':
1064 case 'o':
1065 ctx.device = xstrdup(optarg);
1066 break;
1067 case 'H':
1068 prio_high = true;
1069 break;
1070 case 'A':
1071 set_sock_mem = false;
1072 break;
1073 case 'Q':
1074 set_irq_aff = false;
1075 break;
1076 case 'q':
1077 ctx.qdisc_path = true;
1078 break;
1079 case 'r':
1080 ctx.rand = true;
1081 break;
1082 case 's':
1083 slow = true;
1084 ctx.cpus = 1;
1085 ctx.smoke_test = true;
1086 ctx.rhost = xstrdup(optarg);
1087 break;
1088 case 'R':
1089 ctx.rfraw = true;
1090 break;
1091 case 'J':
1092 ctx.jumbo_support = true;
1093 break;
1094 case 'c':
1095 case 'i':
1096 confname = xstrdup(optarg);
1097 if (c == 'i' && strstr(confname, ".pcap")) {
1098 ctx.sh.type = SHAPER_TSTAMP;
1099 ctx.pcap_in = confname;
1100 } else if (!strncmp("-", confname, strlen("-")))
1101 ctx.cpus = 1;
1102 break;
1103 case 'u':
1104 ctx.uid = strtoul(optarg, NULL, 0);
1105 ctx.enforce = true;
1106 break;
1107 case 'g':
1108 ctx.gid = strtoul(optarg, NULL, 0);
1109 ctx.enforce = true;
1110 break;
1111 case 'k':
1112 printf("Option -k/--kernel-pull is no longer used and "
1113 "will be removed in a future release!\n");
1114 break;
1115 case 'E':
1116 seed = strtoul(optarg, NULL, 0);
1117 reseed = false;
1118 break;
1119 case 'n':
1120 orig_num = strtoul(optarg, NULL, 0);
1121 ctx.num = orig_num;
1122 break;
1123 case 't':
1124 gap = strtoul(optarg, &ptr, 0);
1125 if (!gap && optarg == ptr)
1126 panic("Invalid gap param\n");
1127
1128 if (!strncmp(ptr, "ns", strlen("ns"))) {
1129 delay.tv_sec = gap / 1000000000;
1130 delay.tv_nsec = gap % 1000000000;
1131 } else if (*ptr == '\0' || !strncmp(ptr, "us", strlen("us"))) {
1132 /* Default to microseconds for backwards
1133 * compatibility if no postfix is given.
1134 */
1135 delay.tv_sec = gap / 1000000;
1136 delay.tv_nsec = (gap % 1000000) * 1000;
1137 } else if (!strncmp(ptr, "ms", strlen("ms"))) {
1138 delay.tv_sec = gap / 1000;
1139 delay.tv_nsec = (gap % 1000) * 1000000;
1140 } else if (!strncmp(ptr, "s", strlen("s"))) {
1141 delay.tv_sec = gap;
1142 delay.tv_nsec = 0;
1143 } else {
1144 panic("Syntax error in time param!\n");
1145 }
1146
1147 shaper_set_delay(&ctx.sh, delay.tv_sec, delay.tv_nsec);
1148 break;
1149 case 'b':
1150 rate = strtoul(optarg, &ptr, 0);
1151 if (!rate && optarg == ptr)
1152 panic("Invalid rate param\n");
1153
1154 if (strncmp(ptr, "pps", strlen("pps")) == 0) {
1155 shape_type = SHAPER_PKTS;
1156 } else if (strncmp(ptr, "B", strlen("B")) == 0) {
1157 shape_type = SHAPER_BYTES;
1158 } else if (strncmp(ptr, "kB", strlen("kB")) == 0) {
1159 shape_type = SHAPER_BYTES;
1160 rate *= 1000;
1161 } else if (strncmp(ptr, "MB", strlen("MB")) == 0) {
1162 shape_type = SHAPER_BYTES;
1163 rate *= 1000 * 1000;
1164 } else if (strncmp(ptr, "GB", strlen("GB")) == 0) {
1165 shape_type = SHAPER_BYTES;
1166 rate *= 1000 * 1000 * 1000;
1167 } else if (strncmp(ptr, "kbit", strlen("kbit")) == 0) {
1168 shape_type = SHAPER_BYTES;
1169 rate *= 1000 / 8;
1170 } else if (strncmp(ptr, "Mbit", strlen("Mbit")) == 0) {
1171 shape_type = SHAPER_BYTES;
1172 rate *= 1000 * 1000 / 8;
1173 } else if (strncmp(ptr, "Gbit", strlen("Gbit")) == 0) {
1174 shape_type = SHAPER_BYTES;
1175 rate *= 1000 * 1000 * 1000 / 8;
1176 } else if (strncmp(ptr, "KiB", strlen("KiB")) == 0) {
1177 shape_type = SHAPER_BYTES;
1178 rate *= 1 << 10;
1179 } else if (strncmp(ptr, "MiB", strlen("MiB")) == 0) {
1180 shape_type = SHAPER_BYTES;
1181 rate *= 1 << 20;
1182 } else if (strncmp(ptr, "GiB", strlen("GiB")) == 0) {
1183 shape_type = SHAPER_BYTES;
1184 rate *= 1 << 30;
1185 } else if (!rate) {
1186 shape_type = SHAPER_NONE;
1187 } else {
1188 panic("Invalid unit type for rate\n");
1189 }
1190
1191 shaper_set_rate(&ctx.sh, rate, shape_type);
1192 break;
1193 case 'S':
1194 ctx.reserve_size = strtoul(optarg, &ptr, 0);
1195 if (ctx.reserve_size == 0 && ptr == optarg)
1196 panic("Invalid ring size param\n");
1197
1198 if (!strncmp(ptr, "KiB", strlen("KiB")))
1199 ctx.reserve_size *= 1 << 10;
1200 else if (!strncmp(ptr, "MiB", strlen("MiB")))
1201 ctx.reserve_size = 1 << 20;
1202 else if (!strncmp(ptr, "GiB", strlen("GiB")))
1203 ctx.reserve_size *= 1 << 30;
1204 else
1205 panic("Invalid ring size unit type\n");
1206
1207 break;
1208 case '?':
1209 switch (optopt) {
1210 case 'd':
1211 case 'c':
1212 case 'n':
1213 case 'S':
1214 case 's':
1215 case 'P':
1216 case 'o':
1217 case 'E':
1218 case 'i':
1219 case 'k':
1220 case 'u':
1221 case 'g':
1222 case 't':
1223 panic("Option -%c requires an argument!\n",
1224 optopt);
1225 default:
1226 if (isprint(optopt))
1227 printf("Unknown option character `0x%X\'!\n", optopt);
1228 die();
1229 }
1230 default:
1231 break;
1232 }
1233 }
1234
1235 if (argc >= optind) {
1236 min_opts = 4;
1237 ctx.packet_str = argv2str(optind, argc, argv);
1238 }
1239
1240 if (argc < min_opts)
1241 help();
1242 if (ctx.device == NULL)
1243 panic("No networking device given!\n");
1244 if (confname == NULL && !ctx.packet_str)
1245 panic("No configuration file or packet string given!\n");
1246
1247 register_signal(SIGINT, signal_handler);
1248 register_signal(SIGQUIT, signal_handler);
1249 register_signal(SIGTERM, signal_handler);
1250 register_signal(SIGHUP, signal_handler);
1251
1252 if (prio_high) {
1253 set_proc_prio(-20);
1254 set_sched_status(SCHED_FIFO, sched_get_priority_max(SCHED_FIFO));
1255 }
1256
1257 if (set_sock_mem)
1258 set_system_socket_memory(vals, array_size(vals));
1259 xlockme();
1260
1261 if (ctx.pcap_in) {
1262 ctx.dev_in = dev_io_create(ctx.pcap_in, DEV_IO_IN);
1263 if (!ctx.dev_in)
1264 panic("Failed to open input device\n");
1265 dev_io_open(ctx.dev_in);
1266 }
1267
1268 ctx.dev_out = dev_io_create(ctx.device, DEV_IO_OUT);
1269 if (!ctx.dev_out)
1270 panic("Failed to open output device\n");
1271
1272 if (ctx.rfraw) {
1273 if (dev_io_link_type_set(ctx.dev_out, LINKTYPE_IEEE802_11_RADIOTAP))
1274 panic("Failed to setup rfraw device\n");
1275
1276 panic_handler_add(on_panic_del_rfmon, ctx.dev_out);
1277 }
1278
1279 protos_init(ctx.dev_out);
1280
1281 if (shaper_is_set(&ctx.sh) || (ctx.dev_in && !dev_io_is_netdev(ctx.dev_in))
1282 || !dev_io_is_netdev(ctx.dev_out)) {
1283
1284 prctl(PR_SET_TIMERSLACK, 1UL);
1285 /* Fall back to single core to not mess up correct timing.
1286 * We are slow anyway!
1287 */
1288 ctx.cpus = 1;
1289 slow = true;
1290 }
1291
1292 /*
1293 * If number of packets is smaller than number of CPUs use only as
1294 * many CPUs as there are packets. Otherwise we end up sending more
1295 * packets than intended or none at all.
1296 */
1297 if (ctx.num)
1298 ctx.cpus = min_t(unsigned int, ctx.num, ctx.cpus);
1299
1300 if (set_irq_aff && dev_io_is_netdev(ctx.dev_out)) {
1301 irq = device_irq_number(ctx.device);
1302 device_set_irq_affinity_list(irq, 0, ctx.cpus - 1);
1303 }
1304
1305 stats = setup_shared_var(ctx.cpus);
1306
1307 for (i = 0; i < ctx.cpus; i++) {
1308 pid_t pid = fork();
1309
1310 switch (pid) {
1311 case 0:
1312 if (reseed)
1313 seed = generate_srand_seed();
1314 srand(seed);
1315
1316 cpu_affinity(i);
1317 main_loop(&ctx, confname, slow, i, invoke_cpp,
1318 cpp_argv, orig_num);
1319
1320 goto thread_out;
1321 case -1:
1322 panic("Cannot fork processes!\n");
1323 }
1324 }
1325
1326 for (i = 0; i < ctx.cpus; i++) {
1327 int status;
1328
1329 wait(&status);
1330 if (WEXITSTATUS(status) == EXIT_FAILURE)
1331 die();
1332 }
1333
1334 if (set_sock_mem)
1335 reset_system_socket_memory(vals, array_size(vals));
1336
1337 for (i = 0, tx_packets = tx_bytes = 0; i < ctx.cpus; i++) {
1338 while ((__get_state(i) & CPU_STATS_STATE_RES) == 0)
1339 sched_yield();
1340
1341 tx_packets += stats[i].tx_packets;
1342 tx_bytes += stats[i].tx_bytes;
1343 }
1344
1345 fflush(stdout);
1346 printf("\n");
1347 printf("\r%12llu packets outgoing\n", tx_packets);
1348 printf("\r%12llu bytes outgoing\n", tx_bytes);
1349 for (i = 0; cpustats && i < ctx.cpus; i++) {
1350 printf("\r%12lu sec, %lu usec on CPU%d (%llu packets)\n",
1351 stats[i].tv_sec, stats[i].tv_usec, i,
1352 stats[i].tx_packets);
1353 }
1354
1355 thread_out:
1356 xunlockme();
1357 destroy_shared_var(stats, ctx.cpus);
1358 if (dev_io_is_netdev(ctx.dev_out) && set_irq_aff)
1359 device_restore_irq_affinity_list();
1360
1361 argv_free(cpp_argv);
1362 free(ctx.device);
1363 free(ctx.rhost);
1364 free(confname);
1365 free(ctx.packet_str);
1366
1367 return 0;
1368 }
netsniff-ng toolkit, the packet sniffing beast, staging tree