1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2014 Google Inc.
4 * Author: willemb@google.com (Willem de Bruijn)
5 *
6 * Test software tx timestamping, including
7 *
8 * - SCHED, SND and ACK timestamps
9 * - RAW, UDP and TCP
10 * - IPv4 and IPv6
11 * - various packet sizes (to test GSO and TSO)
12 *
13 * Consult the command line arguments for help on running
14 * the various testcases.
15 *
16 * This test requires a dummy TCP server.
17 * A simple `nc6 [-u] -l -p $DESTPORT` will do
18 */
19
20 #define _GNU_SOURCE
21
22 #include <arpa/inet.h>
23 #include <asm/types.h>
24 #include <error.h>
25 #include <errno.h>
26 #include <inttypes.h>
27 #include <linux/errqueue.h>
28 #include <linux/if_ether.h>
29 #include <linux/if_packet.h>
30 #include <linux/ipv6.h>
31 #include <linux/net_tstamp.h>
32 #include <netdb.h>
33 #include <net/if.h>
34 #include <netinet/in.h>
35 #include <netinet/ip.h>
36 #include <netinet/udp.h>
37 #include <netinet/tcp.h>
38 #include <poll.h>
39 #include <stdarg.h>
40 #include <stdbool.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <sys/epoll.h>
45 #include <sys/ioctl.h>
46 #include <sys/select.h>
47 #include <sys/socket.h>
48 #include <sys/time.h>
49 #include <sys/types.h>
50 #include <time.h>
51 #include <unistd.h>
52
53 #define NSEC_PER_USEC 1000L
54 #define USEC_PER_SEC 1000000L
55 #define NSEC_PER_SEC 1000000000LL
56
57 /* command line parameters */
58 static int cfg_proto = SOCK_STREAM;
59 static int cfg_ipproto = IPPROTO_TCP;
60 static int cfg_num_pkts = 4;
61 static int do_ipv4 = 1;
62 static int do_ipv6 = 1;
63 static int cfg_payload_len = 10;
64 static int cfg_poll_timeout = 100;
65 static int cfg_delay_snd;
66 static int cfg_delay_ack;
67 static int cfg_delay_tolerance_usec = 500;
68 static bool cfg_show_payload;
69 static bool cfg_do_pktinfo;
70 static bool cfg_busy_poll;
71 static int cfg_sleep_usec = 50 * 1000;
72 static bool cfg_loop_nodata;
73 static bool cfg_use_cmsg;
74 static bool cfg_use_pf_packet;
75 static bool cfg_use_epoll;
76 static bool cfg_epollet;
77 static bool cfg_do_listen;
78 static uint16_t dest_port = 9000;
79 static bool cfg_print_nsec;
80
81 static struct sockaddr_in daddr;
82 static struct sockaddr_in6 daddr6;
83 static struct timespec ts_usr;
84
85 static int saved_tskey = -1;
86 static int saved_tskey_type = -1;
87
88 struct timing_event {
89 int64_t min;
90 int64_t max;
91 int64_t total;
92 int count;
93 };
94
95 static struct timing_event usr_enq;
96 static struct timing_event usr_snd;
97 static struct timing_event usr_ack;
98
99 static bool test_failed;
100
timespec_to_ns64(struct timespec * ts)101 static int64_t timespec_to_ns64(struct timespec *ts)
102 {
103 return ts->tv_sec * NSEC_PER_SEC + ts->tv_nsec;
104 }
105
timespec_to_us64(struct timespec * ts)106 static int64_t timespec_to_us64(struct timespec *ts)
107 {
108 return ts->tv_sec * USEC_PER_SEC + ts->tv_nsec / NSEC_PER_USEC;
109 }
110
init_timing_event(struct timing_event * te)111 static void init_timing_event(struct timing_event *te)
112 {
113 te->min = INT64_MAX;
114 te->max = 0;
115 te->total = 0;
116 te->count = 0;
117 }
118
add_timing_event(struct timing_event * te,struct timespec * t_start,struct timespec * t_end)119 static void add_timing_event(struct timing_event *te,
120 struct timespec *t_start, struct timespec *t_end)
121 {
122 int64_t ts_delta = timespec_to_ns64(t_end) - timespec_to_ns64(t_start);
123
124 te->count++;
125 if (ts_delta < te->min)
126 te->min = ts_delta;
127 if (ts_delta > te->max)
128 te->max = ts_delta;
129 te->total += ts_delta;
130 }
131
validate_key(int tskey,int tstype)132 static void validate_key(int tskey, int tstype)
133 {
134 int stepsize;
135
136 /* compare key for each subsequent request
137 * must only test for one type, the first one requested
138 */
139 if (saved_tskey == -1)
140 saved_tskey_type = tstype;
141 else if (saved_tskey_type != tstype)
142 return;
143
144 stepsize = cfg_proto == SOCK_STREAM ? cfg_payload_len : 1;
145 if (tskey != saved_tskey + stepsize) {
146 fprintf(stderr, "ERROR: key %d, expected %d\n",
147 tskey, saved_tskey + stepsize);
148 test_failed = true;
149 }
150
151 saved_tskey = tskey;
152 }
153
validate_timestamp(struct timespec * cur,int min_delay)154 static void validate_timestamp(struct timespec *cur, int min_delay)
155 {
156 int64_t cur64, start64;
157 int max_delay;
158
159 cur64 = timespec_to_us64(cur);
160 start64 = timespec_to_us64(&ts_usr);
161 max_delay = min_delay + cfg_delay_tolerance_usec;
162
163 if (cur64 < start64 + min_delay || cur64 > start64 + max_delay) {
164 fprintf(stderr, "ERROR: %lu us expected between %d and %d\n",
165 cur64 - start64, min_delay, max_delay);
166 test_failed = true;
167 }
168 }
169
__print_ts_delta_formatted(int64_t ts_delta)170 static void __print_ts_delta_formatted(int64_t ts_delta)
171 {
172 if (cfg_print_nsec)
173 fprintf(stderr, "%lu ns", ts_delta);
174 else
175 fprintf(stderr, "%lu us", ts_delta / NSEC_PER_USEC);
176 }
177
__print_timestamp(const char * name,struct timespec * cur,uint32_t key,int payload_len)178 static void __print_timestamp(const char *name, struct timespec *cur,
179 uint32_t key, int payload_len)
180 {
181 int64_t ts_delta;
182
183 if (!(cur->tv_sec | cur->tv_nsec))
184 return;
185
186 if (cfg_print_nsec)
187 fprintf(stderr, " %s: %lu s %lu ns (seq=%u, len=%u)",
188 name, cur->tv_sec, cur->tv_nsec,
189 key, payload_len);
190 else
191 fprintf(stderr, " %s: %lu s %lu us (seq=%u, len=%u)",
192 name, cur->tv_sec, cur->tv_nsec / NSEC_PER_USEC,
193 key, payload_len);
194
195 if (cur != &ts_usr) {
196 ts_delta = timespec_to_ns64(cur) - timespec_to_ns64(&ts_usr);
197 fprintf(stderr, " (USR +");
198 __print_ts_delta_formatted(ts_delta);
199 fprintf(stderr, ")");
200 }
201
202 fprintf(stderr, "\n");
203 }
204
print_timestamp_usr(void)205 static void print_timestamp_usr(void)
206 {
207 if (clock_gettime(CLOCK_REALTIME, &ts_usr))
208 error(1, errno, "clock_gettime");
209
210 __print_timestamp(" USR", &ts_usr, 0, 0);
211 }
212
print_timestamp(struct scm_timestamping * tss,int tstype,int tskey,int payload_len)213 static void print_timestamp(struct scm_timestamping *tss, int tstype,
214 int tskey, int payload_len)
215 {
216 const char *tsname;
217
218 validate_key(tskey, tstype);
219
220 switch (tstype) {
221 case SCM_TSTAMP_SCHED:
222 tsname = " ENQ";
223 validate_timestamp(&tss->ts[0], 0);
224 add_timing_event(&usr_enq, &ts_usr, &tss->ts[0]);
225 break;
226 case SCM_TSTAMP_SND:
227 tsname = " SND";
228 validate_timestamp(&tss->ts[0], cfg_delay_snd);
229 add_timing_event(&usr_snd, &ts_usr, &tss->ts[0]);
230 break;
231 case SCM_TSTAMP_ACK:
232 tsname = " ACK";
233 validate_timestamp(&tss->ts[0], cfg_delay_ack);
234 add_timing_event(&usr_ack, &ts_usr, &tss->ts[0]);
235 break;
236 default:
237 error(1, 0, "unknown timestamp type: %u",
238 tstype);
239 }
240 __print_timestamp(tsname, &tss->ts[0], tskey, payload_len);
241 }
242
print_timing_event(char * name,struct timing_event * te)243 static void print_timing_event(char *name, struct timing_event *te)
244 {
245 if (!te->count)
246 return;
247
248 fprintf(stderr, " %s: count=%d", name, te->count);
249 fprintf(stderr, ", avg=");
250 __print_ts_delta_formatted((int64_t)(te->total / te->count));
251 fprintf(stderr, ", min=");
252 __print_ts_delta_formatted(te->min);
253 fprintf(stderr, ", max=");
254 __print_ts_delta_formatted(te->max);
255 fprintf(stderr, "\n");
256 }
257
258 /* TODO: convert to check_and_print payload once API is stable */
print_payload(char * data,int len)259 static void print_payload(char *data, int len)
260 {
261 int i;
262
263 if (!len)
264 return;
265
266 if (len > 70)
267 len = 70;
268
269 fprintf(stderr, "payload: ");
270 for (i = 0; i < len; i++)
271 fprintf(stderr, "%02hhx ", data[i]);
272 fprintf(stderr, "\n");
273 }
274
print_pktinfo(int family,int ifindex,void * saddr,void * daddr)275 static void print_pktinfo(int family, int ifindex, void *saddr, void *daddr)
276 {
277 char sa[INET6_ADDRSTRLEN], da[INET6_ADDRSTRLEN];
278
279 fprintf(stderr, " pktinfo: ifindex=%u src=%s dst=%s\n",
280 ifindex,
281 saddr ? inet_ntop(family, saddr, sa, sizeof(sa)) : "unknown",
282 daddr ? inet_ntop(family, daddr, da, sizeof(da)) : "unknown");
283 }
284
__epoll(int epfd)285 static void __epoll(int epfd)
286 {
287 struct epoll_event events;
288 int ret;
289
290 memset(&events, 0, sizeof(events));
291 ret = epoll_wait(epfd, &events, 1, cfg_poll_timeout);
292 if (ret != 1)
293 error(1, errno, "epoll_wait");
294 }
295
__poll(int fd)296 static void __poll(int fd)
297 {
298 struct pollfd pollfd;
299 int ret;
300
301 memset(&pollfd, 0, sizeof(pollfd));
302 pollfd.fd = fd;
303 ret = poll(&pollfd, 1, cfg_poll_timeout);
304 if (ret != 1)
305 error(1, errno, "poll");
306 }
307
__recv_errmsg_cmsg(struct msghdr * msg,int payload_len)308 static void __recv_errmsg_cmsg(struct msghdr *msg, int payload_len)
309 {
310 struct sock_extended_err *serr = NULL;
311 struct scm_timestamping *tss = NULL;
312 struct cmsghdr *cm;
313 int batch = 0;
314
315 for (cm = CMSG_FIRSTHDR(msg);
316 cm && cm->cmsg_len;
317 cm = CMSG_NXTHDR(msg, cm)) {
318 if (cm->cmsg_level == SOL_SOCKET &&
319 cm->cmsg_type == SCM_TIMESTAMPING) {
320 tss = (void *) CMSG_DATA(cm);
321 } else if ((cm->cmsg_level == SOL_IP &&
322 cm->cmsg_type == IP_RECVERR) ||
323 (cm->cmsg_level == SOL_IPV6 &&
324 cm->cmsg_type == IPV6_RECVERR) ||
325 (cm->cmsg_level == SOL_PACKET &&
326 cm->cmsg_type == PACKET_TX_TIMESTAMP)) {
327 serr = (void *) CMSG_DATA(cm);
328 if (serr->ee_errno != ENOMSG ||
329 serr->ee_origin != SO_EE_ORIGIN_TIMESTAMPING) {
330 fprintf(stderr, "unknown ip error %d %d\n",
331 serr->ee_errno,
332 serr->ee_origin);
333 serr = NULL;
334 }
335 } else if (cm->cmsg_level == SOL_IP &&
336 cm->cmsg_type == IP_PKTINFO) {
337 struct in_pktinfo *info = (void *) CMSG_DATA(cm);
338 print_pktinfo(AF_INET, info->ipi_ifindex,
339 &info->ipi_spec_dst, &info->ipi_addr);
340 } else if (cm->cmsg_level == SOL_IPV6 &&
341 cm->cmsg_type == IPV6_PKTINFO) {
342 struct in6_pktinfo *info6 = (void *) CMSG_DATA(cm);
343 print_pktinfo(AF_INET6, info6->ipi6_ifindex,
344 NULL, &info6->ipi6_addr);
345 } else
346 fprintf(stderr, "unknown cmsg %d,%d\n",
347 cm->cmsg_level, cm->cmsg_type);
348
349 if (serr && tss) {
350 print_timestamp(tss, serr->ee_info, serr->ee_data,
351 payload_len);
352 serr = NULL;
353 tss = NULL;
354 batch++;
355 }
356 }
357
358 if (batch > 1)
359 fprintf(stderr, "batched %d timestamps\n", batch);
360 }
361
recv_errmsg(int fd)362 static int recv_errmsg(int fd)
363 {
364 static char ctrl[1024 /* overprovision*/];
365 static struct msghdr msg;
366 struct iovec entry;
367 static char *data;
368 int ret = 0;
369
370 data = malloc(cfg_payload_len);
371 if (!data)
372 error(1, 0, "malloc");
373
374 memset(&msg, 0, sizeof(msg));
375 memset(&entry, 0, sizeof(entry));
376 memset(ctrl, 0, sizeof(ctrl));
377
378 entry.iov_base = data;
379 entry.iov_len = cfg_payload_len;
380 msg.msg_iov = &entry;
381 msg.msg_iovlen = 1;
382 msg.msg_name = NULL;
383 msg.msg_namelen = 0;
384 msg.msg_control = ctrl;
385 msg.msg_controllen = sizeof(ctrl);
386
387 ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
388 if (ret == -1 && errno != EAGAIN)
389 error(1, errno, "recvmsg");
390
391 if (ret >= 0) {
392 __recv_errmsg_cmsg(&msg, ret);
393 if (cfg_show_payload)
394 print_payload(data, cfg_payload_len);
395 }
396
397 free(data);
398 return ret == -1;
399 }
400
get_ip_csum(const uint16_t * start,int num_words,unsigned long sum)401 static uint16_t get_ip_csum(const uint16_t *start, int num_words,
402 unsigned long sum)
403 {
404 int i;
405
406 for (i = 0; i < num_words; i++)
407 sum += start[i];
408
409 while (sum >> 16)
410 sum = (sum & 0xFFFF) + (sum >> 16);
411
412 return ~sum;
413 }
414
get_udp_csum(const struct udphdr * udph,int alen)415 static uint16_t get_udp_csum(const struct udphdr *udph, int alen)
416 {
417 unsigned long pseudo_sum, csum_len;
418 const void *csum_start = udph;
419
420 pseudo_sum = htons(IPPROTO_UDP);
421 pseudo_sum += udph->len;
422
423 /* checksum ip(v6) addresses + udp header + payload */
424 csum_start -= alen * 2;
425 csum_len = ntohs(udph->len) + alen * 2;
426
427 return get_ip_csum(csum_start, csum_len >> 1, pseudo_sum);
428 }
429
fill_header_ipv4(void * p)430 static int fill_header_ipv4(void *p)
431 {
432 struct iphdr *iph = p;
433
434 memset(iph, 0, sizeof(*iph));
435
436 iph->ihl = 5;
437 iph->version = 4;
438 iph->ttl = 2;
439 iph->saddr = daddr.sin_addr.s_addr; /* set for udp csum calc */
440 iph->daddr = daddr.sin_addr.s_addr;
441 iph->protocol = IPPROTO_UDP;
442
443 /* kernel writes saddr, csum, len */
444
445 return sizeof(*iph);
446 }
447
fill_header_ipv6(void * p)448 static int fill_header_ipv6(void *p)
449 {
450 struct ipv6hdr *ip6h = p;
451
452 memset(ip6h, 0, sizeof(*ip6h));
453
454 ip6h->version = 6;
455 ip6h->payload_len = htons(sizeof(struct udphdr) + cfg_payload_len);
456 ip6h->nexthdr = IPPROTO_UDP;
457 ip6h->hop_limit = 64;
458
459 ip6h->saddr = daddr6.sin6_addr;
460 ip6h->daddr = daddr6.sin6_addr;
461
462 /* kernel does not write saddr in case of ipv6 */
463
464 return sizeof(*ip6h);
465 }
466
fill_header_udp(void * p,bool is_ipv4)467 static void fill_header_udp(void *p, bool is_ipv4)
468 {
469 struct udphdr *udph = p;
470
471 udph->source = ntohs(dest_port + 1); /* spoof */
472 udph->dest = ntohs(dest_port);
473 udph->len = ntohs(sizeof(*udph) + cfg_payload_len);
474 udph->check = 0;
475
476 udph->check = get_udp_csum(udph, is_ipv4 ? sizeof(struct in_addr) :
477 sizeof(struct in6_addr));
478 }
479
do_test(int family,unsigned int report_opt)480 static void do_test(int family, unsigned int report_opt)
481 {
482 char control[CMSG_SPACE(sizeof(uint32_t))];
483 struct sockaddr_ll laddr;
484 unsigned int sock_opt;
485 struct cmsghdr *cmsg;
486 struct msghdr msg;
487 struct iovec iov;
488 char *buf;
489 int fd, i, val = 1, total_len, epfd = 0;
490
491 init_timing_event(&usr_enq);
492 init_timing_event(&usr_snd);
493 init_timing_event(&usr_ack);
494
495 total_len = cfg_payload_len;
496 if (cfg_use_pf_packet || cfg_proto == SOCK_RAW) {
497 total_len += sizeof(struct udphdr);
498 if (cfg_use_pf_packet || cfg_ipproto == IPPROTO_RAW) {
499 if (family == PF_INET)
500 total_len += sizeof(struct iphdr);
501 else
502 total_len += sizeof(struct ipv6hdr);
503 }
504 /* special case, only rawv6_sendmsg:
505 * pass proto in sin6_port if not connected
506 * also see ANK comment in net/ipv4/raw.c
507 */
508 daddr6.sin6_port = htons(cfg_ipproto);
509 }
510
511 buf = malloc(total_len);
512 if (!buf)
513 error(1, 0, "malloc");
514
515 fd = socket(cfg_use_pf_packet ? PF_PACKET : family,
516 cfg_proto, cfg_ipproto);
517 if (fd < 0)
518 error(1, errno, "socket");
519
520 if (cfg_use_epoll) {
521 struct epoll_event ev;
522
523 memset(&ev, 0, sizeof(ev));
524 ev.data.fd = fd;
525 if (cfg_epollet)
526 ev.events |= EPOLLET;
527 epfd = epoll_create(1);
528 if (epfd <= 0)
529 error(1, errno, "epoll_create");
530 if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &ev))
531 error(1, errno, "epoll_ctl");
532 }
533
534 /* reset expected key on each new socket */
535 saved_tskey = -1;
536
537 if (cfg_proto == SOCK_STREAM) {
538 if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
539 (char*) &val, sizeof(val)))
540 error(1, 0, "setsockopt no nagle");
541
542 if (family == PF_INET) {
543 if (connect(fd, (void *) &daddr, sizeof(daddr)))
544 error(1, errno, "connect ipv4");
545 } else {
546 if (connect(fd, (void *) &daddr6, sizeof(daddr6)))
547 error(1, errno, "connect ipv6");
548 }
549 }
550
551 if (cfg_do_pktinfo) {
552 if (family == AF_INET6) {
553 if (setsockopt(fd, SOL_IPV6, IPV6_RECVPKTINFO,
554 &val, sizeof(val)))
555 error(1, errno, "setsockopt pktinfo ipv6");
556 } else {
557 if (setsockopt(fd, SOL_IP, IP_PKTINFO,
558 &val, sizeof(val)))
559 error(1, errno, "setsockopt pktinfo ipv4");
560 }
561 }
562
563 sock_opt = SOF_TIMESTAMPING_SOFTWARE |
564 SOF_TIMESTAMPING_OPT_CMSG |
565 SOF_TIMESTAMPING_OPT_ID;
566
567 if (!cfg_use_cmsg)
568 sock_opt |= report_opt;
569
570 if (cfg_loop_nodata)
571 sock_opt |= SOF_TIMESTAMPING_OPT_TSONLY;
572
573 if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING,
574 (char *) &sock_opt, sizeof(sock_opt)))
575 error(1, 0, "setsockopt timestamping");
576
577 for (i = 0; i < cfg_num_pkts; i++) {
578 memset(&msg, 0, sizeof(msg));
579 memset(buf, 'a' + i, total_len);
580
581 if (cfg_use_pf_packet || cfg_proto == SOCK_RAW) {
582 int off = 0;
583
584 if (cfg_use_pf_packet || cfg_ipproto == IPPROTO_RAW) {
585 if (family == PF_INET)
586 off = fill_header_ipv4(buf);
587 else
588 off = fill_header_ipv6(buf);
589 }
590
591 fill_header_udp(buf + off, family == PF_INET);
592 }
593
594 print_timestamp_usr();
595
596 iov.iov_base = buf;
597 iov.iov_len = total_len;
598
599 if (cfg_proto != SOCK_STREAM) {
600 if (cfg_use_pf_packet) {
601 memset(&laddr, 0, sizeof(laddr));
602
603 laddr.sll_family = AF_PACKET;
604 laddr.sll_ifindex = 1;
605 laddr.sll_protocol = htons(family == AF_INET ? ETH_P_IP : ETH_P_IPV6);
606 laddr.sll_halen = ETH_ALEN;
607
608 msg.msg_name = (void *)&laddr;
609 msg.msg_namelen = sizeof(laddr);
610 } else if (family == PF_INET) {
611 msg.msg_name = (void *)&daddr;
612 msg.msg_namelen = sizeof(daddr);
613 } else {
614 msg.msg_name = (void *)&daddr6;
615 msg.msg_namelen = sizeof(daddr6);
616 }
617 }
618
619 msg.msg_iov = &iov;
620 msg.msg_iovlen = 1;
621
622 if (cfg_use_cmsg) {
623 memset(control, 0, sizeof(control));
624
625 msg.msg_control = control;
626 msg.msg_controllen = sizeof(control);
627
628 cmsg = CMSG_FIRSTHDR(&msg);
629 cmsg->cmsg_level = SOL_SOCKET;
630 cmsg->cmsg_type = SO_TIMESTAMPING;
631 cmsg->cmsg_len = CMSG_LEN(sizeof(uint32_t));
632
633 *((uint32_t *) CMSG_DATA(cmsg)) = report_opt;
634 }
635
636 val = sendmsg(fd, &msg, 0);
637 if (val != total_len)
638 error(1, errno, "send");
639
640 /* wait for all errors to be queued, else ACKs arrive OOO */
641 if (cfg_sleep_usec)
642 usleep(cfg_sleep_usec);
643
644 if (!cfg_busy_poll) {
645 if (cfg_use_epoll)
646 __epoll(epfd);
647 else
648 __poll(fd);
649 }
650
651 while (!recv_errmsg(fd)) {}
652 }
653
654 print_timing_event("USR-ENQ", &usr_enq);
655 print_timing_event("USR-SND", &usr_snd);
656 print_timing_event("USR-ACK", &usr_ack);
657
658 if (close(fd))
659 error(1, errno, "close");
660
661 free(buf);
662 usleep(100 * NSEC_PER_USEC);
663 }
664
usage(const char * filepath)665 static void __attribute__((noreturn)) usage(const char *filepath)
666 {
667 fprintf(stderr, "\nUsage: %s [options] hostname\n"
668 "\nwhere options are:\n"
669 " -4: only IPv4\n"
670 " -6: only IPv6\n"
671 " -h: show this message\n"
672 " -b: busy poll to read from error queue\n"
673 " -c N: number of packets for each test\n"
674 " -C: use cmsg to set tstamp recording options\n"
675 " -e: use level-triggered epoll() instead of poll()\n"
676 " -E: use event-triggered epoll() instead of poll()\n"
677 " -F: poll()/epoll() waits forever for an event\n"
678 " -I: request PKTINFO\n"
679 " -l N: send N bytes at a time\n"
680 " -L listen on hostname and port\n"
681 " -n: set no-payload option\n"
682 " -N: print timestamps and durations in nsec (instead of usec)\n"
683 " -p N: connect to port N\n"
684 " -P: use PF_PACKET\n"
685 " -r: use raw\n"
686 " -R: use raw (IP_HDRINCL)\n"
687 " -S N: usec to sleep before reading error queue\n"
688 " -t N: tolerance (usec) for timestamp validation\n"
689 " -u: use udp\n"
690 " -v: validate SND delay (usec)\n"
691 " -V: validate ACK delay (usec)\n"
692 " -x: show payload (up to 70 bytes)\n",
693 filepath);
694 exit(1);
695 }
696
parse_opt(int argc,char ** argv)697 static void parse_opt(int argc, char **argv)
698 {
699 int proto_count = 0;
700 int c;
701
702 while ((c = getopt(argc, argv,
703 "46bc:CeEFhIl:LnNp:PrRS:t:uv:V:x")) != -1) {
704 switch (c) {
705 case '4':
706 do_ipv6 = 0;
707 break;
708 case '6':
709 do_ipv4 = 0;
710 break;
711 case 'b':
712 cfg_busy_poll = true;
713 break;
714 case 'c':
715 cfg_num_pkts = strtoul(optarg, NULL, 10);
716 break;
717 case 'C':
718 cfg_use_cmsg = true;
719 break;
720 case 'e':
721 cfg_use_epoll = true;
722 break;
723 case 'E':
724 cfg_use_epoll = true;
725 cfg_epollet = true;
726 case 'F':
727 cfg_poll_timeout = -1;
728 break;
729 case 'I':
730 cfg_do_pktinfo = true;
731 break;
732 case 'l':
733 cfg_payload_len = strtoul(optarg, NULL, 10);
734 break;
735 case 'L':
736 cfg_do_listen = true;
737 break;
738 case 'n':
739 cfg_loop_nodata = true;
740 break;
741 case 'N':
742 cfg_print_nsec = true;
743 break;
744 case 'p':
745 dest_port = strtoul(optarg, NULL, 10);
746 break;
747 case 'P':
748 proto_count++;
749 cfg_use_pf_packet = true;
750 cfg_proto = SOCK_DGRAM;
751 cfg_ipproto = 0;
752 break;
753 case 'r':
754 proto_count++;
755 cfg_proto = SOCK_RAW;
756 cfg_ipproto = IPPROTO_UDP;
757 break;
758 case 'R':
759 proto_count++;
760 cfg_proto = SOCK_RAW;
761 cfg_ipproto = IPPROTO_RAW;
762 break;
763 case 'S':
764 cfg_sleep_usec = strtoul(optarg, NULL, 10);
765 break;
766 case 't':
767 cfg_delay_tolerance_usec = strtoul(optarg, NULL, 10);
768 break;
769 case 'u':
770 proto_count++;
771 cfg_proto = SOCK_DGRAM;
772 cfg_ipproto = IPPROTO_UDP;
773 break;
774 case 'v':
775 cfg_delay_snd = strtoul(optarg, NULL, 10);
776 break;
777 case 'V':
778 cfg_delay_ack = strtoul(optarg, NULL, 10);
779 break;
780 case 'x':
781 cfg_show_payload = true;
782 break;
783 case 'h':
784 default:
785 usage(argv[0]);
786 }
787 }
788
789 if (!cfg_payload_len)
790 error(1, 0, "payload may not be nonzero");
791 if (cfg_proto != SOCK_STREAM && cfg_payload_len > 1472)
792 error(1, 0, "udp packet might exceed expected MTU");
793 if (!do_ipv4 && !do_ipv6)
794 error(1, 0, "pass -4 or -6, not both");
795 if (proto_count > 1)
796 error(1, 0, "pass -P, -r, -R or -u, not multiple");
797 if (cfg_do_pktinfo && cfg_use_pf_packet)
798 error(1, 0, "cannot ask for pktinfo over pf_packet");
799 if (cfg_busy_poll && cfg_use_epoll)
800 error(1, 0, "pass epoll or busy_poll, not both");
801
802 if (optind != argc - 1)
803 error(1, 0, "missing required hostname argument");
804 }
805
resolve_hostname(const char * hostname)806 static void resolve_hostname(const char *hostname)
807 {
808 struct addrinfo hints = { .ai_family = do_ipv4 ? AF_INET : AF_INET6 };
809 struct addrinfo *addrs, *cur;
810 int have_ipv4 = 0, have_ipv6 = 0;
811
812 retry:
813 if (getaddrinfo(hostname, NULL, &hints, &addrs))
814 error(1, errno, "getaddrinfo");
815
816 cur = addrs;
817 while (cur && !have_ipv4 && !have_ipv6) {
818 if (!have_ipv4 && cur->ai_family == AF_INET) {
819 memcpy(&daddr, cur->ai_addr, sizeof(daddr));
820 daddr.sin_port = htons(dest_port);
821 have_ipv4 = 1;
822 }
823 else if (!have_ipv6 && cur->ai_family == AF_INET6) {
824 memcpy(&daddr6, cur->ai_addr, sizeof(daddr6));
825 daddr6.sin6_port = htons(dest_port);
826 have_ipv6 = 1;
827 }
828 cur = cur->ai_next;
829 }
830 if (addrs)
831 freeaddrinfo(addrs);
832
833 if (do_ipv6 && hints.ai_family != AF_INET6) {
834 hints.ai_family = AF_INET6;
835 goto retry;
836 }
837
838 do_ipv4 &= have_ipv4;
839 do_ipv6 &= have_ipv6;
840 }
841
do_listen(int family,void * addr,int alen)842 static void do_listen(int family, void *addr, int alen)
843 {
844 int fd, type;
845
846 type = cfg_proto == SOCK_RAW ? SOCK_DGRAM : cfg_proto;
847
848 fd = socket(family, type, 0);
849 if (fd == -1)
850 error(1, errno, "socket rx");
851
852 if (bind(fd, addr, alen))
853 error(1, errno, "bind rx");
854
855 if (type == SOCK_STREAM && listen(fd, 10))
856 error(1, errno, "listen rx");
857
858 /* leave fd open, will be closed on process exit.
859 * this enables connect() to succeed and avoids icmp replies
860 */
861 }
862
do_main(int family)863 static void do_main(int family)
864 {
865 fprintf(stderr, "family: %s %s\n",
866 family == PF_INET ? "INET" : "INET6",
867 cfg_use_pf_packet ? "(PF_PACKET)" : "");
868
869 fprintf(stderr, "test SND\n");
870 do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE);
871
872 fprintf(stderr, "test ENQ\n");
873 do_test(family, SOF_TIMESTAMPING_TX_SCHED);
874
875 fprintf(stderr, "test ENQ + SND\n");
876 do_test(family, SOF_TIMESTAMPING_TX_SCHED |
877 SOF_TIMESTAMPING_TX_SOFTWARE);
878
879 if (cfg_proto == SOCK_STREAM) {
880 fprintf(stderr, "\ntest ACK\n");
881 do_test(family, SOF_TIMESTAMPING_TX_ACK);
882
883 fprintf(stderr, "\ntest SND + ACK\n");
884 do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE |
885 SOF_TIMESTAMPING_TX_ACK);
886
887 fprintf(stderr, "\ntest ENQ + SND + ACK\n");
888 do_test(family, SOF_TIMESTAMPING_TX_SCHED |
889 SOF_TIMESTAMPING_TX_SOFTWARE |
890 SOF_TIMESTAMPING_TX_ACK);
891 }
892 }
893
894 const char *sock_names[] = { NULL, "TCP", "UDP", "RAW" };
895
main(int argc,char ** argv)896 int main(int argc, char **argv)
897 {
898 if (argc == 1)
899 usage(argv[0]);
900
901 parse_opt(argc, argv);
902 resolve_hostname(argv[argc - 1]);
903
904 fprintf(stderr, "protocol: %s\n", sock_names[cfg_proto]);
905 fprintf(stderr, "payload: %u\n", cfg_payload_len);
906 fprintf(stderr, "server port: %u\n", dest_port);
907 fprintf(stderr, "\n");
908
909 if (do_ipv4) {
910 if (cfg_do_listen)
911 do_listen(PF_INET, &daddr, sizeof(daddr));
912 do_main(PF_INET);
913 }
914
915 if (do_ipv6) {
916 if (cfg_do_listen)
917 do_listen(PF_INET6, &daddr6, sizeof(daddr6));
918 do_main(PF_INET6);
919 }
920
921 return test_failed;
922 }
923
