2 * Copyright 2014 Google Inc.
5 * Test software tx timestamping, including
7 * - SCHED, SND and ACK timestamps
10 * - various packet sizes (to test GSO and TSO)
12 * Consult the command line arguments for help on running
13 * the various testcases.
15 * This test requires a dummy TCP server.
16 * A simple `nc6 [-u] -l -p $DESTPORT` will do
19 * This program is free software; you can redistribute it and/or modify it
20 * under the terms and conditions of the GNU General Public License,
21 * version 2, as published by the Free Software Foundation.
23 * This program is distributed in the hope it will be useful, but WITHOUT
24 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
25 * FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for
28 * You should have received a copy of the GNU General Public License along with
29 * this program; if not, write to the Free Software Foundation, Inc.,
30 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
35 #include <arpa/inet.h>
36 #include <asm/types.h>
39 #include <linux/errqueue.h>
40 #include <linux/if_ether.h>
41 #include <linux/net_tstamp.h>
44 #include <netinet/in.h>
45 #include <netinet/ip.h>
46 #include <netinet/udp.h>
47 #include <netinet/tcp.h>
48 #include <netpacket/packet.h>
56 #include <sys/ioctl.h>
57 #include <sys/select.h>
58 #include <sys/socket.h>
60 #include <sys/types.h>
64 /* command line parameters */
65 static int cfg_proto = SOCK_STREAM;
66 static int cfg_ipproto = IPPROTO_TCP;
67 static int cfg_num_pkts = 4;
68 static int do_ipv4 = 1;
69 static int do_ipv6 = 1;
70 static int cfg_payload_len = 10;
71 static bool cfg_show_payload;
72 static bool cfg_do_pktinfo;
73 static bool cfg_loop_nodata;
74 static uint16_t dest_port = 9000;
76 static struct sockaddr_in daddr;
77 static struct sockaddr_in6 daddr6;
78 static struct timespec ts_prev;
80 static void __print_timestamp(const char *name, struct timespec *cur,
81 uint32_t key, int payload_len)
83 if (!(cur->tv_sec | cur->tv_nsec))
86 fprintf(stderr, " %s: %lu s %lu us (seq=%u, len=%u)",
87 name, cur->tv_sec, cur->tv_nsec / 1000,
90 if ((ts_prev.tv_sec | ts_prev.tv_nsec)) {
91 int64_t cur_ms, prev_ms;
93 cur_ms = (long) cur->tv_sec * 1000 * 1000;
94 cur_ms += cur->tv_nsec / 1000;
96 prev_ms = (long) ts_prev.tv_sec * 1000 * 1000;
97 prev_ms += ts_prev.tv_nsec / 1000;
99 fprintf(stderr, " (%+ld us)", cur_ms - prev_ms);
103 fprintf(stderr, "\n");
106 static void print_timestamp_usr(void)
109 struct timeval tv; /* avoid dependency on -lrt */
111 gettimeofday(&tv, NULL);
112 ts.tv_sec = tv.tv_sec;
113 ts.tv_nsec = tv.tv_usec * 1000;
115 __print_timestamp(" USR", &ts, 0, 0);
118 static void print_timestamp(struct scm_timestamping *tss, int tstype,
119 int tskey, int payload_len)
124 case SCM_TSTAMP_SCHED:
134 error(1, 0, "unknown timestamp type: %u",
137 __print_timestamp(tsname, &tss->ts[0], tskey, payload_len);
140 /* TODO: convert to check_and_print payload once API is stable */
141 static void print_payload(char *data, int len)
151 fprintf(stderr, "payload: ");
152 for (i = 0; i < len; i++)
153 fprintf(stderr, "%02hhx ", data[i]);
154 fprintf(stderr, "\n");
157 static void print_pktinfo(int family, int ifindex, void *saddr, void *daddr)
159 char sa[INET6_ADDRSTRLEN], da[INET6_ADDRSTRLEN];
161 fprintf(stderr, " pktinfo: ifindex=%u src=%s dst=%s\n",
163 saddr ? inet_ntop(family, saddr, sa, sizeof(sa)) : "unknown",
164 daddr ? inet_ntop(family, daddr, da, sizeof(da)) : "unknown");
167 static void __poll(int fd)
169 struct pollfd pollfd;
172 memset(&pollfd, 0, sizeof(pollfd));
174 ret = poll(&pollfd, 1, 100);
176 error(1, errno, "poll");
179 static void __recv_errmsg_cmsg(struct msghdr *msg, int payload_len)
181 struct sock_extended_err *serr = NULL;
182 struct scm_timestamping *tss = NULL;
186 for (cm = CMSG_FIRSTHDR(msg);
188 cm = CMSG_NXTHDR(msg, cm)) {
189 if (cm->cmsg_level == SOL_SOCKET &&
190 cm->cmsg_type == SCM_TIMESTAMPING) {
191 tss = (void *) CMSG_DATA(cm);
192 } else if ((cm->cmsg_level == SOL_IP &&
193 cm->cmsg_type == IP_RECVERR) ||
194 (cm->cmsg_level == SOL_IPV6 &&
195 cm->cmsg_type == IPV6_RECVERR)) {
196 serr = (void *) CMSG_DATA(cm);
197 if (serr->ee_errno != ENOMSG ||
198 serr->ee_origin != SO_EE_ORIGIN_TIMESTAMPING) {
199 fprintf(stderr, "unknown ip error %d %d\n",
204 } else if (cm->cmsg_level == SOL_IP &&
205 cm->cmsg_type == IP_PKTINFO) {
206 struct in_pktinfo *info = (void *) CMSG_DATA(cm);
207 print_pktinfo(AF_INET, info->ipi_ifindex,
208 &info->ipi_spec_dst, &info->ipi_addr);
209 } else if (cm->cmsg_level == SOL_IPV6 &&
210 cm->cmsg_type == IPV6_PKTINFO) {
211 struct in6_pktinfo *info6 = (void *) CMSG_DATA(cm);
212 print_pktinfo(AF_INET6, info6->ipi6_ifindex,
213 NULL, &info6->ipi6_addr);
215 fprintf(stderr, "unknown cmsg %d,%d\n",
216 cm->cmsg_level, cm->cmsg_type);
219 print_timestamp(tss, serr->ee_info, serr->ee_data,
228 fprintf(stderr, "batched %d timestamps\n", batch);
231 static int recv_errmsg(int fd)
233 static char ctrl[1024 /* overprovision*/];
234 static struct msghdr msg;
239 data = malloc(cfg_payload_len);
241 error(1, 0, "malloc");
243 memset(&msg, 0, sizeof(msg));
244 memset(&entry, 0, sizeof(entry));
245 memset(ctrl, 0, sizeof(ctrl));
247 entry.iov_base = data;
248 entry.iov_len = cfg_payload_len;
249 msg.msg_iov = &entry;
253 msg.msg_control = ctrl;
254 msg.msg_controllen = sizeof(ctrl);
256 ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
257 if (ret == -1 && errno != EAGAIN)
258 error(1, errno, "recvmsg");
261 __recv_errmsg_cmsg(&msg, ret);
262 if (cfg_show_payload)
263 print_payload(data, cfg_payload_len);
270 static void do_test(int family, unsigned int opt)
273 int fd, i, val = 1, total_len;
275 if (family == AF_INET6 && cfg_proto != SOCK_STREAM) {
276 /* due to lack of checksum generation code */
277 fprintf(stderr, "test: skipping datagram over IPv6\n");
281 total_len = cfg_payload_len;
282 if (cfg_proto == SOCK_RAW) {
283 total_len += sizeof(struct udphdr);
284 if (cfg_ipproto == IPPROTO_RAW)
285 total_len += sizeof(struct iphdr);
288 buf = malloc(total_len);
290 error(1, 0, "malloc");
292 fd = socket(family, cfg_proto, cfg_ipproto);
294 error(1, errno, "socket");
296 if (cfg_proto == SOCK_STREAM) {
297 if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
298 (char*) &val, sizeof(val)))
299 error(1, 0, "setsockopt no nagle");
301 if (family == PF_INET) {
302 if (connect(fd, (void *) &daddr, sizeof(daddr)))
303 error(1, errno, "connect ipv4");
305 if (connect(fd, (void *) &daddr6, sizeof(daddr6)))
306 error(1, errno, "connect ipv6");
310 if (cfg_do_pktinfo) {
311 if (family == AF_INET6) {
312 if (setsockopt(fd, SOL_IPV6, IPV6_RECVPKTINFO,
314 error(1, errno, "setsockopt pktinfo ipv6");
316 if (setsockopt(fd, SOL_IP, IP_PKTINFO,
318 error(1, errno, "setsockopt pktinfo ipv4");
322 opt |= SOF_TIMESTAMPING_SOFTWARE |
323 SOF_TIMESTAMPING_OPT_CMSG |
324 SOF_TIMESTAMPING_OPT_ID;
326 opt |= SOF_TIMESTAMPING_OPT_TSONLY;
328 if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING,
329 (char *) &opt, sizeof(opt)))
330 error(1, 0, "setsockopt timestamping");
332 for (i = 0; i < cfg_num_pkts; i++) {
333 memset(&ts_prev, 0, sizeof(ts_prev));
334 memset(buf, 'a' + i, total_len);
336 if (cfg_proto == SOCK_RAW) {
340 if (cfg_ipproto == IPPROTO_RAW) {
341 struct iphdr *iph = (void *) buf;
343 memset(iph, 0, sizeof(*iph));
347 iph->daddr = daddr.sin_addr.s_addr;
348 iph->protocol = IPPROTO_UDP;
349 /* kernel writes saddr, csum, len */
354 udph = (void *) buf + off;
355 udph->source = ntohs(9000); /* random spoof */
356 udph->dest = ntohs(dest_port);
357 udph->len = ntohs(sizeof(*udph) + cfg_payload_len);
358 udph->check = 0; /* not allowed for IPv6 */
361 print_timestamp_usr();
362 if (cfg_proto != SOCK_STREAM) {
363 if (family == PF_INET)
364 val = sendto(fd, buf, total_len, 0, (void *) &daddr, sizeof(daddr));
366 val = sendto(fd, buf, total_len, 0, (void *) &daddr6, sizeof(daddr6));
368 val = send(fd, buf, cfg_payload_len, 0);
370 if (val != total_len)
371 error(1, errno, "send");
373 /* wait for all errors to be queued, else ACKs arrive OOO */
378 while (!recv_errmsg(fd)) {}
382 error(1, errno, "close");
388 static void __attribute__((noreturn)) usage(const char *filepath)
390 fprintf(stderr, "\nUsage: %s [options] hostname\n"
391 "\nwhere options are:\n"
394 " -h: show this message\n"
395 " -I: request PKTINFO\n"
396 " -l N: send N bytes at a time\n"
397 " -n: set no-payload option\n"
399 " -R: use raw (IP_HDRINCL)\n"
400 " -p N: connect to port N\n"
402 " -x: show payload (up to 70 bytes)\n",
407 static void parse_opt(int argc, char **argv)
412 while ((c = getopt(argc, argv, "46hIl:np:rRux")) != -1) {
421 cfg_do_pktinfo = true;
424 cfg_loop_nodata = true;
428 cfg_proto = SOCK_RAW;
429 cfg_ipproto = IPPROTO_UDP;
433 cfg_proto = SOCK_RAW;
434 cfg_ipproto = IPPROTO_RAW;
438 cfg_proto = SOCK_DGRAM;
439 cfg_ipproto = IPPROTO_UDP;
442 cfg_payload_len = strtoul(optarg, NULL, 10);
445 dest_port = strtoul(optarg, NULL, 10);
448 cfg_show_payload = true;
456 if (!cfg_payload_len)
457 error(1, 0, "payload may not be nonzero");
458 if (cfg_proto != SOCK_STREAM && cfg_payload_len > 1472)
459 error(1, 0, "udp packet might exceed expected MTU");
460 if (!do_ipv4 && !do_ipv6)
461 error(1, 0, "pass -4 or -6, not both");
463 error(1, 0, "pass -r, -R or -u, not multiple");
465 if (optind != argc - 1)
466 error(1, 0, "missing required hostname argument");
469 static void resolve_hostname(const char *hostname)
471 struct addrinfo *addrs, *cur;
472 int have_ipv4 = 0, have_ipv6 = 0;
474 if (getaddrinfo(hostname, NULL, NULL, &addrs))
475 error(1, errno, "getaddrinfo");
478 while (cur && !have_ipv4 && !have_ipv6) {
479 if (!have_ipv4 && cur->ai_family == AF_INET) {
480 memcpy(&daddr, cur->ai_addr, sizeof(daddr));
481 daddr.sin_port = htons(dest_port);
484 else if (!have_ipv6 && cur->ai_family == AF_INET6) {
485 memcpy(&daddr6, cur->ai_addr, sizeof(daddr6));
486 daddr6.sin6_port = htons(dest_port);
494 do_ipv4 &= have_ipv4;
495 do_ipv6 &= have_ipv6;
498 static void do_main(int family)
500 fprintf(stderr, "family: %s\n",
501 family == PF_INET ? "INET" : "INET6");
503 fprintf(stderr, "test SND\n");
504 do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE);
506 fprintf(stderr, "test ENQ\n");
507 do_test(family, SOF_TIMESTAMPING_TX_SCHED);
509 fprintf(stderr, "test ENQ + SND\n");
510 do_test(family, SOF_TIMESTAMPING_TX_SCHED |
511 SOF_TIMESTAMPING_TX_SOFTWARE);
513 if (cfg_proto == SOCK_STREAM) {
514 fprintf(stderr, "\ntest ACK\n");
515 do_test(family, SOF_TIMESTAMPING_TX_ACK);
517 fprintf(stderr, "\ntest SND + ACK\n");
518 do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE |
519 SOF_TIMESTAMPING_TX_ACK);
521 fprintf(stderr, "\ntest ENQ + SND + ACK\n");
522 do_test(family, SOF_TIMESTAMPING_TX_SCHED |
523 SOF_TIMESTAMPING_TX_SOFTWARE |
524 SOF_TIMESTAMPING_TX_ACK);
528 const char *sock_names[] = { NULL, "TCP", "UDP", "RAW" };
530 int main(int argc, char **argv)
535 parse_opt(argc, argv);
536 resolve_hostname(argv[argc - 1]);
538 fprintf(stderr, "protocol: %s\n", sock_names[cfg_proto]);
539 fprintf(stderr, "payload: %u\n", cfg_payload_len);
540 fprintf(stderr, "server port: %u\n", dest_port);
541 fprintf(stderr, "\n");