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ui: Print empty rows when clearing table
[netsniff-ng-new.git] / trafgen.c
blob949f90909580ddca5d03e9f7b5af88166c85fa51
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 #include <stdio.h>
9 #include <string.h>
10 #include <getopt.h>
11 #include <ctype.h>
12 #include <stdbool.h>
13 #include <sched.h>
14 #include <sys/socket.h>
15 #include <sys/types.h>
16 #include <sys/fsuid.h>
17 #include <sys/prctl.h>
18 #include <sys/stat.h>
19 #include <sys/time.h>
20 #include <sys/wait.h>
21 #include <sys/mman.h>
22 #include <net/ethernet.h>
23 #include <netinet/in.h>
24 #include <netinet/ip.h>
25 #include <linux/icmp.h>
26 #include <linux/if.h>
27 #include <arpa/inet.h>
28 #include <signal.h>
29 #include <stdint.h>
30 #include <stdlib.h>
31 #include <fcntl.h>
32 #include <time.h>
33 #include <poll.h>
34 #include <netdb.h>
35 #include <math.h>
36 #include <unistd.h>
37
38 #include "xmalloc.h"
39 #include "die.h"
40 #include "str.h"
41 #include "sig.h"
42 #include "sock.h"
43 #include "cpus.h"
44 #include "lockme.h"
45 #include "privs.h"
46 #include "proc.h"
47 #include "mac80211.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
59 #ifndef timeval_to_timespec
60 #define timeval_to_timespec(tv, ts) { \
61 (ts)->tv_sec = (tv)->tv_sec; \
62 (ts)->tv_nsec = (tv)->tv_usec * 1000; \
63 }
64 #endif
65
66 enum shaper_type {
67 SHAPER_NONE,
68 SHAPER_PKTS,
69 SHAPER_BYTES,
70 };
71
72 struct shaper {
73 enum shaper_type type;
74 unsigned long long sent;
75 unsigned long long rate;
76 struct timeval start;
77 struct timeval end;
78 struct timespec delay;
79 };
80
81 struct ctx {
82 bool rand, rfraw, jumbo_support, verbose, smoke_test, enforce, qdisc_path;
83 size_t reserve_size;
84 unsigned long num;
85 unsigned int cpus;
86 uid_t uid; gid_t gid;
87 char *device, *device_trans, *rhost;
88 struct sockaddr_in dest;
89 struct shaper sh;
90 char *packet_str;
91 };
92
93 struct cpu_stats {
94 unsigned long tv_sec, tv_usec;
95 unsigned long long tx_packets, tx_bytes;
96 unsigned long long cf_packets, cf_bytes;
97 unsigned long long cd_packets;
98 sig_atomic_t state;
99 };
100
101 static sig_atomic_t sigint = 0;
102
103 struct packet *packets = NULL;
104 size_t plen = 0;
105
106 struct packet_dyn *packet_dyn = NULL;
107 size_t dlen = 0;
108
109 static const char *short_options = "d:c:n:t:vJhS:rk:i:o:VRs:P:eE:pu:g:CHQqD:b:";
110 static const struct option long_options[] = {
111 {"dev", required_argument, NULL, 'd'},
112 {"out", required_argument, NULL, 'o'},
113 {"in", required_argument, NULL, 'i'},
114 {"conf", required_argument, NULL, 'c'},
115 {"num", required_argument, NULL, 'n'},
116 {"gap", required_argument, NULL, 't'},
117 {"rate", required_argument, NULL, 'b'},
118 {"cpus", required_argument, NULL, 'P'},
119 {"ring-size", required_argument, NULL, 'S'},
120 {"kernel-pull", required_argument, NULL, 'k'},
121 {"smoke-test", required_argument, NULL, 's'},
122 {"seed", required_argument, NULL, 'E'},
123 {"user", required_argument, NULL, 'u'},
124 {"group", required_argument, NULL, 'g'},
125 {"prio-high", no_argument, NULL, 'H'},
126 {"notouch-irq", no_argument, NULL, 'Q'},
127 {"no-sock-mem", no_argument, NULL, 'A'},
128 {"qdisc-path", no_argument, NULL, 'q'},
129 {"jumbo-support", no_argument, NULL, 'J'},
130 {"no-cpu-stats", no_argument, NULL, 'C'},
131 {"cpp", no_argument, NULL, 'p'},
132 {"define", required_argument, NULL, 'D'},
133 {"rfraw", no_argument, NULL, 'R'},
134 {"rand", no_argument, NULL, 'r'},
135 {"verbose", no_argument, NULL, 'V'},
136 {"version", no_argument, NULL, 'v'},
137 {"example", no_argument, NULL, 'e'},
138 {"help", no_argument, NULL, 'h'},
139 {NULL, 0, NULL, 0}
140 };
141
142 static const char *copyright = "Please report bugs to <netsniff-ng@googlegroups.com>\n"
143 "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
144 "Swiss federal institute of technology (ETH Zurich)\n"
145 "License: GNU GPL version 2.0\n"
146 "This is free software: you are free to change and redistribute it.\n"
147 "There is NO WARRANTY, to the extent permitted by law.";
148
149 static int sock;
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> Networking device 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 Enabled 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
320 switch (counter->type) {
321 case TYPE_INC:
322 val = (val + counter->inc) % (counter->max - counter->min + 1);
323 break;
324 case TYPE_DEC:
325 val = (val - counter->inc) % (counter->min - counter->max + 1);
326 break;
327 default:
328 bug();
329 }
330
331 counter->val = val + counter->min;
332 packets[id].payload[counter->off] = val;
333 }
334 }
335
336 static void apply_randomizer(int id)
337 {
338 size_t j, rand_max = packet_dyn[id].rlen;
339
340 for (j = 0; j < rand_max; ++j) {
341 uint8_t val = (uint8_t) rand();
342 struct randomizer *randomizer = &packet_dyn[id].rnd[j];
343
344 packets[id].payload[randomizer->off] = val;
345 }
346 }
347
348 static void apply_csum16(int id)
349 {
350 size_t j, csum_max = packet_dyn[id].slen;
351
352 for (j = 0; j < csum_max; ++j) {
353 uint16_t sum = 0;
354 struct csum16 *csum = &packet_dyn[id].csum[j];
355
356 fmemset(&packets[id].payload[csum->off], 0, sizeof(sum));
357 if (unlikely((size_t) csum->to >= packets[id].len))
358 csum->to = packets[id].len - 1;
359
360 switch (csum->which) {
361 case CSUM_IP:
362 sum = calc_csum(packets[id].payload + csum->from,
363 csum->to - csum->from + 1);
364 break;
365 case CSUM_UDP:
366 sum = p4_csum((void *) packets[id].payload + csum->from,
367 packets[id].payload + csum->to,
368 (packets[id].len - csum->to),
369 IPPROTO_UDP);
370 break;
371 case CSUM_TCP:
372 sum = p4_csum((void *) packets[id].payload + csum->from,
373 packets[id].payload + csum->to,
374 (packets[id].len - csum->to),
375 IPPROTO_TCP);
376 break;
377 case CSUM_UDP6:
378 sum = p6_csum((void *) packets[id].payload + csum->from,
379 packets[id].payload + csum->to,
380 (packets[id].len - csum->to),
381 IPPROTO_UDP);
382 break;
383 case CSUM_TCP6:
384 sum = p6_csum((void *) packets[id].payload + csum->from,
385 packets[id].payload + csum->to,
386 (packets[id].len - csum->to),
387 IPPROTO_TCP);
388 break;
389 default:
390 bug();
391 break;
392 }
393
394 fmemcpy(&packets[id].payload[csum->off], &sum, sizeof(sum));
395 }
396 }
397
398 static void preprocess_packets(void)
399 {
400 size_t i;
401
402 for (i = 0; i < plen; i++) {
403 struct packet_dyn *pktd = &packet_dyn[i];
404
405 if (packet_dyn_has_only_csums(pktd)) {
406 apply_csum16(i);
407 pktd->slen = 0;
408 xfree(pktd->csum);
409 }
410 }
411 }
412
413 static struct cpu_stats *setup_shared_var(unsigned int cpus)
414 {
415 int fd;
416 size_t len = cpus * sizeof(struct cpu_stats);
417 char *zbuff, file[256];
418 struct cpu_stats *buff;
419
420 zbuff = xzmalloc(len);
421 slprintf(file, sizeof(file), ".tmp_mmap.%u", (unsigned int) rand());
422
423 fd = creat(file, S_IRUSR | S_IWUSR);
424 bug_on(fd < 0);
425 close(fd);
426
427 fd = open_or_die_m(file, O_RDWR | O_CREAT | O_TRUNC,
428 S_IRUSR | S_IWUSR);
429 write_or_die(fd, zbuff, len);
430 xfree(zbuff);
431
432 buff = mmap(NULL, len, PROT_READ | PROT_WRITE,
433 MAP_SHARED, fd, 0);
434 if (buff == MAP_FAILED)
435 panic("Cannot setup shared variable!\n");
436
437 close(fd);
438 unlink(file);
439
440 memset(buff, 0, len);
441 return buff;
442 }
443
444 static void destroy_shared_var(void *buff, unsigned int cpus)
445 {
446 munmap(buff, cpus * sizeof(struct cpu_stats));
447 }
448
449 static void dump_trafgen_snippet(uint8_t *payload, size_t len)
450 {
451 size_t i;
452
453 printf("{");
454 for (i = 0; i < len; ++i) {
455 if (i % 15 == 0)
456 printf("\n ");
457 printf("0x%02x, ", payload[i]);
458 }
459 printf("\n}\n");
460 fflush(stdout);
461 }
462
463 static int xmit_smoke_setup(struct ctx *ctx)
464 {
465 int icmp_sock, ret, ttl = 64;
466 struct icmp_filter filter;
467
468 icmp_sock = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
469 if (icmp_sock < 0)
470 panic("Cannot get a ICMP socket: %s!\n", strerror(errno));
471
472 filter.data = ~(1 << ICMP_ECHOREPLY);
473
474 ret = setsockopt(icmp_sock, SOL_RAW, ICMP_FILTER, &filter, sizeof(filter));
475 if (ret < 0)
476 panic("Cannot install filter!\n");
477
478 ret = setsockopt(icmp_sock, SOL_IP, IP_TTL, &ttl, sizeof(ttl));
479 if (ret < 0)
480 panic("Cannot set TTL!\n");
481
482 memset(&ctx->dest, 0, sizeof(ctx->dest));
483 ctx->dest.sin_family = AF_INET;
484 ctx->dest.sin_port = 0;
485
486 ret = inet_aton(ctx->rhost, &ctx->dest.sin_addr);
487 if (ret < 0)
488 panic("Cannot resolve address!\n");
489
490 return icmp_sock;
491 }
492
493 static int xmit_smoke_probe(int icmp_sock, struct ctx *ctx)
494 {
495 int ret;
496 unsigned int i, j;
497 short ident, cnt = 1, idstore[SMOKE_N_PROBES];
498 uint8_t outpack[512], *data;
499 struct icmphdr *icmp;
500 struct iphdr *ip;
501 size_t len = sizeof(*icmp) + 56;
502 struct sockaddr_in from;
503 socklen_t from_len;
504 struct pollfd fds = {
505 .fd = icmp_sock,
506 .events = POLLIN,
507 };
508
509 fmemset(idstore, 0, sizeof(idstore));
510 for (j = 0; j < SMOKE_N_PROBES; j++) {
511 while ((ident = htons((short) rand())) == 0)
512 sleep(0);
513 idstore[j] = ident;
514
515 memset(outpack, 0, sizeof(outpack));
516 icmp = (void *) outpack;
517 icmp->type = ICMP_ECHO;
518 icmp->un.echo.id = ident;
519 icmp->un.echo.sequence = htons(cnt++);
520
521 data = ((uint8_t *) outpack + sizeof(*icmp));
522 for (i = 0; i < 56; ++i)
523 data[i] = (uint8_t) rand();
524
525 icmp->checksum = csum((unsigned short *) outpack,
526 len / sizeof(unsigned short));
527
528 ret = sendto(icmp_sock, outpack, len, MSG_DONTWAIT,
529 (struct sockaddr *) &ctx->dest, sizeof(ctx->dest));
530 if (unlikely(ret != (int) len))
531 panic("Cannot send out probe: %s!\n", strerror(errno));
532
533 ret = poll(&fds, 1, 50);
534 if (ret < 0)
535 panic("Poll failed!\n");
536
537 if (fds.revents & POLLIN) {
538 ret = recvfrom(icmp_sock, outpack, sizeof(outpack), 0,
539 (struct sockaddr *) &from, &from_len);
540 if (unlikely(ret <= 0))
541 panic("Probe receive failed!\n");
542 if (unlikely(from_len != sizeof(ctx->dest)))
543 continue;
544 if (unlikely(memcmp(&from, &ctx->dest, sizeof(ctx->dest))))
545 continue;
546 if (unlikely((size_t) ret < sizeof(*ip) + sizeof(*icmp)))
547 continue;
548 ip = (void *) outpack;
549 if (unlikely(ip->ihl * 4 + sizeof(*icmp) > (size_t) ret))
550 continue;
551 icmp = (void *) outpack + ip->ihl * 4;
552 for (i = 0; i < array_size(idstore); ++i) {
553 if (unlikely(icmp->un.echo.id != idstore[i]))
554 continue;
555 return 0;
556 }
557 }
558 }
559
560 return -1;
561 }
562
563 static bool shaper_is_set(struct shaper *sh)
564 {
565 if ((sh->delay.tv_sec | sh->delay.tv_nsec) > 0)
566 return true;
567
568 return sh->type != SHAPER_NONE;
569 }
570
571 static void shaper_init(struct shaper *sh)
572 {
573 if (sh->type == SHAPER_NONE)
574 return;
575
576 memset(&sh->delay, 0, sizeof(struct timespec));
577 bug_on(gettimeofday(&sh->start, NULL));
578 sh->sent = 0;
579 }
580
581 static void shaper_set_delay(struct shaper *sh, time_t sec, long int ns)
582 {
583 sh->delay.tv_sec = sec;
584 sh->delay.tv_nsec = ns;
585 }
586
587 static void shaper_set_rate(struct shaper *sh, unsigned long long rate,
588 enum shaper_type type)
589 {
590 memset(sh, 0, sizeof(struct shaper));
591 sh->rate = rate;
592 sh->type = type;
593 }
594
595 static void shaper_delay(struct shaper *sh, unsigned long pkt_len)
596 {
597 if (sh->type != SHAPER_NONE)
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
614 if ((sh->delay.tv_sec | sh->delay.tv_nsec) > 0) {
615 nanosleep(&sh->delay, NULL);
616
617 shaper_init(sh);
618 }
619 }
620
621 static void xmit_slowpath_or_die(struct ctx *ctx, unsigned int cpu, unsigned long orig_num)
622 {
623 int ret, icmp_sock = -1;
624 unsigned long num = 1, i = 0;
625 struct timeval start, end, diff;
626 unsigned long long tx_bytes = 0, tx_packets = 0;
627 struct packet_dyn *pktd;
628 struct sockaddr_ll saddr = {
629 .sll_family = PF_PACKET,
630 .sll_halen = ETH_ALEN,
631 .sll_ifindex = device_ifindex(ctx->device),
632 };
633
634 if (ctx->num > 0)
635 num = ctx->num;
636 if (ctx->num == 0 && orig_num > 0)
637 num = 0;
638
639 if (ctx->smoke_test)
640 icmp_sock = xmit_smoke_setup(ctx);
641
642 drop_privileges(ctx->enforce, ctx->uid, ctx->gid);
643
644 bug_on(gettimeofday(&start, NULL));
645
646 if (shaper_is_set(&ctx->sh))
647 shaper_init(&ctx->sh);
648
649 while (likely(sigint == 0 && num > 0 && plen > 0)) {
650 pktd = &packet_dyn[i];
651 if (packet_dyn_has_elems(pktd)) {
652 apply_counter(i);
653 apply_randomizer(i);
654 apply_csum16(i);
655 }
656 retry:
657 ret = sendto(sock, packets[i].payload, packets[i].len, 0,
658 (struct sockaddr *) &saddr, sizeof(saddr));
659 if (unlikely(ret < 0)) {
660 if (errno == ENOBUFS) {
661 sched_yield();
662 goto retry;
663 }
664 if (ctx->smoke_test)
665 panic("Sendto error: %s!\n", strerror(errno));
666 }
667
668 tx_bytes += packets[i].len;
669 tx_packets++;
670
671 if (ctx->smoke_test) {
672 ret = xmit_smoke_probe(icmp_sock, ctx);
673 if (unlikely(ret < 0)) {
674 printf("%sSmoke test alert:%s\n", colorize_start(bold), colorize_end());
675 printf(" Remote host seems to be unresponsive to ICMP probes!\n");
676 printf(" Last instance was packet%lu, seed:%u, trafgen snippet:\n\n",
677 i, seed);
678
679 dump_trafgen_snippet(packets[i].payload, packets[i].len);
680 break;
681 }
682 }
683
684 if (!ctx->rand) {
685 i++;
686 if (i >= plen)
687 i = 0;
688 } else
689 i = rand() % plen;
690
691 if (ctx->num > 0)
692 num--;
693
694 if (shaper_is_set(&ctx->sh))
695 shaper_delay(&ctx->sh, packets[i].len);
696 }
697
698 bug_on(gettimeofday(&end, NULL));
699 timersub(&end, &start, &diff);
700
701 if (ctx->smoke_test)
702 close(icmp_sock);
703
704 stats[cpu].tx_packets = tx_packets;
705 stats[cpu].tx_bytes = tx_bytes;
706 stats[cpu].tv_sec = diff.tv_sec;
707 stats[cpu].tv_usec = diff.tv_usec;
708
709 stats[cpu].state |= CPU_STATS_STATE_RES;
710 }
711
712 static void xmit_fastpath_or_die(struct ctx *ctx, unsigned int cpu, unsigned long orig_num)
713 {
714 int ifindex = device_ifindex(ctx->device);
715 uint8_t *out = NULL;
716 unsigned int it = 0;
717 unsigned long num = 1, i = 0;
718 size_t size = ring_size(ctx->device, ctx->reserve_size);
719 struct ring tx_ring;
720 struct frame_map *hdr;
721 struct timeval start, end, diff;
722 struct packet_dyn *pktd;
723 unsigned long long tx_bytes = 0, tx_packets = 0;
724
725 set_sock_prio(sock, 512);
726
727 ring_tx_setup(&tx_ring, sock, size, ifindex, ctx->jumbo_support, ctx->verbose);
728
729 drop_privileges(ctx->enforce, ctx->uid, ctx->gid);
730
731 if (ctx->num > 0)
732 num = ctx->num;
733 if (ctx->num == 0 && orig_num > 0)
734 num = 0;
735
736 bug_on(gettimeofday(&start, NULL));
737
738 while (likely(sigint == 0 && num > 0 && plen > 0)) {
739 if (!user_may_pull_from_tx(tx_ring.frames[it].iov_base)) {
740 int ret = pull_and_flush_tx_ring(sock);
741 if (unlikely(ret < 0)) {
742 /* We could hit EBADF if the socket has been closed before
743 * the timer was triggered.
744 */
745 if (errno != EBADF && errno != ENOBUFS)
746 panic("Flushing TX_RING failed: %s!\n", strerror(errno));
747 }
748
749 continue;
750 }
751
752 hdr = tx_ring.frames[it].iov_base;
753 out = ((uint8_t *) hdr) + TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);
754
755 hdr->tp_h.tp_snaplen = packets[i].len;
756 hdr->tp_h.tp_len = packets[i].len;
757
758 pktd = &packet_dyn[i];
759 if (packet_dyn_has_elems(pktd)) {
760 apply_counter(i);
761 apply_randomizer(i);
762 apply_csum16(i);
763 }
764
765 fmemcpy(out, packets[i].payload, packets[i].len);
766
767 tx_bytes += packets[i].len;
768 tx_packets++;
769
770 if (!ctx->rand) {
771 i++;
772 if (i >= plen)
773 i = 0;
774 } else
775 i = rand() % plen;
776
777 kernel_may_pull_from_tx(&hdr->tp_h);
778
779 it++;
780 if (it >= tx_ring.layout.tp_frame_nr)
781 it = 0;
782
783 if (ctx->num > 0)
784 num--;
785 }
786
787 bug_on(gettimeofday(&end, NULL));
788 timersub(&end, &start, &diff);
789
790 pull_and_flush_tx_ring_wait(sock);
791 destroy_tx_ring(sock, &tx_ring);
792
793 stats[cpu].tx_packets = tx_packets;
794 stats[cpu].tx_bytes = tx_bytes;
795 stats[cpu].tv_sec = diff.tv_sec;
796 stats[cpu].tv_usec = diff.tv_usec;
797
798 stats[cpu].state |= CPU_STATS_STATE_RES;
799 }
800
801 static inline void __set_state(unsigned int cpu, sig_atomic_t s)
802 {
803 stats[cpu].state = s;
804 }
805
806 static inline sig_atomic_t __get_state(unsigned int cpu)
807 {
808 return stats[cpu].state;
809 }
810
811 static unsigned long __wait_and_sum_others(struct ctx *ctx, unsigned int cpu)
812 {
813 unsigned int i;
814 unsigned long total;
815
816 for (i = 0, total = plen; i < ctx->cpus; i++) {
817 if (i == cpu)
818 continue;
819
820 while ((__get_state(i) &
821 (CPU_STATS_STATE_CFG |
822 CPU_STATS_STATE_RES)) == 0 &&
823 sigint == 0)
824 sched_yield();
825
826 total += stats[i].cf_packets;
827 }
828
829 return total;
830 }
831
832 static void __correct_global_delta(struct ctx *ctx, unsigned int cpu, unsigned long orig)
833 {
834 unsigned int i;
835 unsigned long total;
836 int cpu_sel;
837 long long delta_correction = 0;
838
839 for (i = 0, total = ctx->num; i < ctx->cpus; i++) {
840 if (i == cpu)
841 continue;
842
843 while ((__get_state(i) &
844 (CPU_STATS_STATE_CHK |
845 CPU_STATS_STATE_RES)) == 0 &&
846 sigint == 0)
847 sched_yield();
848
849 total += stats[i].cd_packets;
850 }
851
852 if (total > orig)
853 delta_correction = -1 * ((long long) total - orig);
854 if (total < orig)
855 delta_correction = +1 * ((long long) orig - total);
856
857 for (cpu_sel = -1, i = 0; i < ctx->cpus; i++) {
858 if (stats[i].cd_packets > 0) {
859 if ((long long) stats[i].cd_packets +
860 delta_correction >= 0) {
861 cpu_sel = i;
862 break;
863 }
864 }
865 }
866
867 if ((int) cpu == cpu_sel)
868 ctx->num += delta_correction;
869 }
870
871 static void __set_state_cf(unsigned int cpu, unsigned long p, unsigned long b,
872 sig_atomic_t s)
873 {
874 stats[cpu].cf_packets = p;
875 stats[cpu].cf_bytes = b;
876 stats[cpu].state = s;
877 }
878
879 static void __set_state_cd(unsigned int cpu, unsigned long p, sig_atomic_t s)
880 {
881 stats[cpu].cd_packets = p;
882 stats[cpu].state = s;
883 }
884
885 static void xmit_packet_precheck(struct ctx *ctx, unsigned int cpu)
886 {
887 unsigned long plen_total, orig = ctx->num;
888 size_t total_len = 0;
889 unsigned int i;
890
891 bug_on(plen != dlen);
892
893 for (i = 0; i < plen; ++i)
894 total_len += packets[i].len;
895
896 __set_state_cf(cpu, plen, total_len, CPU_STATS_STATE_CFG);
897 plen_total = __wait_and_sum_others(ctx, cpu);
898
899 if (orig > 0) {
900 ctx->num = (unsigned long) round((1.0 * plen / plen_total) * orig);
901
902 __set_state_cd(cpu, ctx->num, CPU_STATS_STATE_CHK |
903 CPU_STATS_STATE_CFG);
904 __correct_global_delta(ctx, cpu, orig);
905 }
906
907 if (plen == 0) {
908 __set_state(cpu, CPU_STATS_STATE_RES);
909 return;
910 }
911 }
912
913 static void main_loop(struct ctx *ctx, char *confname, bool slow,
914 unsigned int cpu, bool invoke_cpp, char **cpp_argv,
915 unsigned long orig_num)
916 {
917 if (ctx->packet_str)
918 compile_packets_str(ctx->packet_str, ctx->verbose, cpu);
919 else
920 compile_packets(confname, ctx->verbose, cpu, invoke_cpp, cpp_argv);
921
922 preprocess_packets();
923
924 xmit_packet_precheck(ctx, cpu);
925
926 if (cpu == 0) {
927 unsigned int i;
928 size_t total_len = 0, total_pkts = 0;
929
930 for (i = 0; i < ctx->cpus; ++i) {
931 total_len += stats[i].cf_bytes;
932 total_pkts += stats[i].cf_packets;
933 }
934
935 printf("%6zu packets to schedule\n", total_pkts);
936 printf("%6zu bytes in total\n", total_len);
937 printf("Running! Hang up with ^C!\n\n");
938 fflush(stdout);
939 }
940
941 sock = pf_socket();
942
943 if (ctx->qdisc_path == false)
944 set_sock_qdisc_bypass(sock, ctx->verbose);
945
946 if (slow)
947 xmit_slowpath_or_die(ctx, cpu, orig_num);
948 else
949 xmit_fastpath_or_die(ctx, cpu, orig_num);
950
951 close(sock);
952
953 cleanup_packets();
954 }
955
956 static unsigned int generate_srand_seed(void)
957 {
958 int fd;
959 unsigned int _seed;
960
961 fd = open("/dev/urandom", O_RDONLY);
962 if (fd < 0)
963 return time(NULL);
964
965 read_or_die(fd, &_seed, sizeof(_seed));
966
967 close(fd);
968 return _seed;
969 }
970
971 static void on_panic_del_rfmon(void *arg)
972 {
973 leave_rfmon_mac80211(arg);
974 }
975
976 int main(int argc, char **argv)
977 {
978 bool slow = false, invoke_cpp = false, reseed = true, cpustats = true;
979 bool prio_high = false, set_irq_aff = true, set_sock_mem = true;
980 int c, opt_index, vals[4] = {0}, irq;
981 uint64_t gap = 0;
982 unsigned int i;
983 char *confname = NULL, *ptr;
984 unsigned long cpus_tmp, orig_num = 0;
985 unsigned long long tx_packets, tx_bytes;
986 struct ctx ctx;
987 int min_opts = 5;
988 char **cpp_argv = NULL;
989 size_t cpp_argc = 0;
990 unsigned long long rate;
991 enum shaper_type shape_type;
992 struct timespec delay;
993
994 fmemset(&ctx, 0, sizeof(ctx));
995 ctx.cpus = get_number_cpus_online();
996 ctx.uid = getuid();
997 ctx.gid = getgid();
998 ctx.qdisc_path = false;
999
1000 /* Keep an initial small default size to reduce cache-misses. */
1001 ctx.reserve_size = 512 * (1 << 10);
1002
1003 while ((c = getopt_long(argc, argv, short_options, long_options,
1004 &opt_index)) != EOF) {
1005 switch (c) {
1006 case 'h':
1007 help();
1008 break;
1009 case 'v':
1010 version();
1011 break;
1012 case 'C':
1013 cpustats = false;
1014 break;
1015 case 'e':
1016 example();
1017 break;
1018 case 'p':
1019 invoke_cpp = true;
1020 break;
1021 case 'D':
1022 cpp_argv = argv_insert(cpp_argv, &cpp_argc, "-D");
1023 cpp_argv = argv_insert(cpp_argv, &cpp_argc, optarg);
1024 break;
1025 case 'V':
1026 ctx.verbose = true;
1027 break;
1028 case 'P':
1029 cpus_tmp = strtoul(optarg, NULL, 0);
1030 if (cpus_tmp > 0 && cpus_tmp < ctx.cpus)
1031 ctx.cpus = cpus_tmp;
1032 break;
1033 case 'd':
1034 case 'o':
1035 ctx.device = xstrndup(optarg, IFNAMSIZ);
1036 break;
1037 case 'H':
1038 prio_high = true;
1039 break;
1040 case 'A':
1041 set_sock_mem = false;
1042 break;
1043 case 'Q':
1044 set_irq_aff = false;
1045 break;
1046 case 'q':
1047 ctx.qdisc_path = true;
1048 break;
1049 case 'r':
1050 ctx.rand = true;
1051 break;
1052 case 's':
1053 slow = true;
1054 ctx.cpus = 1;
1055 ctx.smoke_test = true;
1056 ctx.rhost = xstrdup(optarg);
1057 break;
1058 case 'R':
1059 ctx.rfraw = true;
1060 break;
1061 case 'J':
1062 ctx.jumbo_support = true;
1063 break;
1064 case 'c':
1065 case 'i':
1066 confname = xstrdup(optarg);
1067 if (!strncmp("-", confname, strlen("-")))
1068 ctx.cpus = 1;
1069 break;
1070 case 'u':
1071 ctx.uid = strtoul(optarg, NULL, 0);
1072 ctx.enforce = true;
1073 break;
1074 case 'g':
1075 ctx.gid = strtoul(optarg, NULL, 0);
1076 ctx.enforce = true;
1077 break;
1078 case 'k':
1079 printf("Option -k/--kernel-pull is no longer used and "
1080 "will be removed in a future release!\n");
1081 break;
1082 case 'E':
1083 seed = strtoul(optarg, NULL, 0);
1084 reseed = false;
1085 break;
1086 case 'n':
1087 orig_num = strtoul(optarg, NULL, 0);
1088 ctx.num = orig_num;
1089 break;
1090 case 't':
1091 gap = strtoul(optarg, &ptr, 0);
1092 if (!gap && optarg == ptr)
1093 panic("Invalid gap param\n");
1094
1095 if (!strncmp(ptr, "ns", strlen("ns"))) {
1096 delay.tv_sec = gap / 1000000000;
1097 delay.tv_nsec = gap % 1000000000;
1098 } else if (*ptr == '\0' || !strncmp(ptr, "us", strlen("us"))) {
1099 /* Default to microseconds for backwards
1100 * compatibility if no postfix is given.
1101 */
1102 delay.tv_sec = gap / 1000000;
1103 delay.tv_nsec = (gap % 1000000) * 1000;
1104 } else if (!strncmp(ptr, "ms", strlen("ms"))) {
1105 delay.tv_sec = gap / 1000;
1106 delay.tv_nsec = (gap % 1000) * 1000000;
1107 } else if (!strncmp(ptr, "s", strlen("s"))) {
1108 delay.tv_sec = gap;
1109 delay.tv_nsec = 0;
1110 } else {
1111 panic("Syntax error in time param!\n");
1112 }
1113
1114 shaper_set_delay(&ctx.sh, delay.tv_sec, delay.tv_nsec);
1115 break;
1116 case 'b':
1117 rate = strtoul(optarg, &ptr, 0);
1118 if (!rate || optarg == ptr)
1119 panic("Invalid rate param\n");
1120
1121 if (strncmp(ptr, "pps", strlen("pps")) == 0) {
1122 shape_type = SHAPER_PKTS;
1123 } else if (strncmp(ptr, "B", strlen("B")) == 0) {
1124 shape_type = SHAPER_BYTES;
1125 } else if (strncmp(ptr, "kB", strlen("kB")) == 0) {
1126 shape_type = SHAPER_BYTES;
1127 rate *= 1000;
1128 } else if (strncmp(ptr, "MB", strlen("MB")) == 0) {
1129 shape_type = SHAPER_BYTES;
1130 rate *= 1000 * 1000;
1131 } else if (strncmp(ptr, "GB", strlen("GB")) == 0) {
1132 shape_type = SHAPER_BYTES;
1133 rate *= 1000 * 1000 * 1000;
1134 } else if (strncmp(ptr, "kbit", strlen("kbit")) == 0) {
1135 shape_type = SHAPER_BYTES;
1136 rate *= 1000 / 8;
1137 } else if (strncmp(ptr, "Mbit", strlen("Mbit")) == 0) {
1138 shape_type = SHAPER_BYTES;
1139 rate *= 1000 * 1000 / 8;
1140 } else if (strncmp(ptr, "Gbit", strlen("Gbit")) == 0) {
1141 shape_type = SHAPER_BYTES;
1142 rate *= 1000 * 1000 * 1000 / 8;
1143 } else if (strncmp(ptr, "KiB", strlen("KiB")) == 0) {
1144 shape_type = SHAPER_BYTES;
1145 rate *= 1 << 10;
1146 } else if (strncmp(ptr, "MiB", strlen("MiB")) == 0) {
1147 shape_type = SHAPER_BYTES;
1148 rate *= 1 << 20;
1149 } else if (strncmp(ptr, "GiB", strlen("GiB")) == 0) {
1150 shape_type = SHAPER_BYTES;
1151 rate *= 1 << 30;
1152 } else {
1153 panic("Invalid unit type for rate\n");
1154 }
1155
1156 shaper_set_rate(&ctx.sh, rate, shape_type);
1157 break;
1158 case 'S':
1159 ctx.reserve_size = strtoul(optarg, &ptr, 0);
1160 if (ctx.reserve_size == 0 && ptr == optarg)
1161 panic("Invalid ring size param\n");
1162
1163 if (!strncmp(ptr, "KiB", strlen("KiB")))
1164 ctx.reserve_size *= 1 << 10;
1165 else if (!strncmp(ptr, "MiB", strlen("MiB")))
1166 ctx.reserve_size = 1 << 20;
1167 else if (!strncmp(ptr, "GiB", strlen("GiB")))
1168 ctx.reserve_size *= 1 << 30;
1169 else
1170 panic("Invalid ring size unit type\n");
1171
1172 break;
1173 case '?':
1174 switch (optopt) {
1175 case 'd':
1176 case 'c':
1177 case 'n':
1178 case 'S':
1179 case 's':
1180 case 'P':
1181 case 'o':
1182 case 'E':
1183 case 'i':
1184 case 'k':
1185 case 'u':
1186 case 'g':
1187 case 't':
1188 panic("Option -%c requires an argument!\n",
1189 optopt);
1190 default:
1191 if (isprint(optopt))
1192 printf("Unknown option character `0x%X\'!\n", optopt);
1193 die();
1194 }
1195 default:
1196 break;
1197 }
1198 }
1199
1200 if (argc >= optind) {
1201 min_opts = 4;
1202 ctx.packet_str = argv2str(optind, argc, argv);
1203 }
1204
1205 if (argc < min_opts)
1206 help();
1207 if (ctx.device == NULL)
1208 panic("No networking device given!\n");
1209 if (confname == NULL && !ctx.packet_str)
1210 panic("No configuration file or packet string given!\n");
1211 if (device_mtu(ctx.device) == 0)
1212 panic("This is no networking device!\n");
1213
1214 register_signal(SIGINT, signal_handler);
1215 register_signal(SIGQUIT, signal_handler);
1216 register_signal(SIGTERM, signal_handler);
1217 register_signal(SIGHUP, signal_handler);
1218
1219 protos_init(ctx.device);
1220
1221 if (prio_high) {
1222 set_proc_prio(-20);
1223 set_sched_status(SCHED_FIFO, sched_get_priority_max(SCHED_FIFO));
1224 }
1225
1226 if (set_sock_mem)
1227 set_system_socket_memory(vals, array_size(vals));
1228 xlockme();
1229
1230 if (ctx.rfraw) {
1231 ctx.device_trans = xstrdup(ctx.device);
1232 xfree(ctx.device);
1233
1234 enter_rfmon_mac80211(ctx.device_trans, &ctx.device);
1235 panic_handler_add(on_panic_del_rfmon, ctx.device);
1236 sleep(0);
1237 }
1238
1239 if (shaper_is_set(&ctx.sh)) {
1240 prctl(PR_SET_TIMERSLACK, 1UL);
1241 /* Fall back to single core to not mess up correct timing.
1242 * We are slow anyway!
1243 */
1244 ctx.cpus = 1;
1245 slow = true;
1246 }
1247
1248 /*
1249 * If number of packets is smaller than number of CPUs use only as
1250 * many CPUs as there are packets. Otherwise we end up sending more
1251 * packets than intended or none at all.
1252 */
1253 if (ctx.num)
1254 ctx.cpus = min_t(unsigned int, ctx.num, ctx.cpus);
1255
1256 irq = device_irq_number(ctx.device);
1257 if (set_irq_aff)
1258 device_set_irq_affinity_list(irq, 0, ctx.cpus - 1);
1259
1260 stats = setup_shared_var(ctx.cpus);
1261
1262 for (i = 0; i < ctx.cpus; i++) {
1263 pid_t pid = fork();
1264
1265 switch (pid) {
1266 case 0:
1267 if (reseed)
1268 seed = generate_srand_seed();
1269 srand(seed);
1270
1271 cpu_affinity(i);
1272 main_loop(&ctx, confname, slow, i, invoke_cpp,
1273 cpp_argv, orig_num);
1274
1275 goto thread_out;
1276 case -1:
1277 panic("Cannot fork processes!\n");
1278 }
1279 }
1280
1281 for (i = 0; i < ctx.cpus; i++) {
1282 int status;
1283
1284 wait(&status);
1285 if (WEXITSTATUS(status) == EXIT_FAILURE)
1286 die();
1287 }
1288
1289 if (ctx.rfraw)
1290 leave_rfmon_mac80211(ctx.device);
1291
1292 if (set_sock_mem)
1293 reset_system_socket_memory(vals, array_size(vals));
1294
1295 for (i = 0, tx_packets = tx_bytes = 0; i < ctx.cpus; i++) {
1296 while ((__get_state(i) & CPU_STATS_STATE_RES) == 0)
1297 sched_yield();
1298
1299 tx_packets += stats[i].tx_packets;
1300 tx_bytes += stats[i].tx_bytes;
1301 }
1302
1303 fflush(stdout);
1304 printf("\n");
1305 printf("\r%12llu packets outgoing\n", tx_packets);
1306 printf("\r%12llu bytes outgoing\n", tx_bytes);
1307 for (i = 0; cpustats && i < ctx.cpus; i++) {
1308 printf("\r%12lu sec, %lu usec on CPU%d (%llu packets)\n",
1309 stats[i].tv_sec, stats[i].tv_usec, i,
1310 stats[i].tx_packets);
1311 }
1312
1313 thread_out:
1314 xunlockme();
1315 destroy_shared_var(stats, ctx.cpus);
1316 if (set_irq_aff)
1317 device_restore_irq_affinity_list();
1318
1319 argv_free(cpp_argv);
1320 free(ctx.device);
1321 free(ctx.device_trans);
1322 free(ctx.rhost);
1323 free(confname);
1324 free(ctx.packet_str);
1325
1326 return 0;
1327 }
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