1 /* $NetBSD: mcast.c,v 1.3 2015/05/28 10:19:17 ozaki-r Exp $ */
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/cdefs.h>
33 __RCSID("$NetBSD: mcast.c,v 1.3 2015/05/28 10:19:17 ozaki-r Exp $");
35 extern const char *__progname;
36 #define getprogname() __progname
39 #include <sys/types.h>
40 #include <sys/socket.h>
43 #include <netinet/in.h>
61 #define ERRX(ev, msg, ...) ATF_REQUIRE_MSG(0, msg, __VA_ARGS__)
62 #define ERRX0(ev, msg) ATF_REQUIRE_MSG(0, msg)
64 #define SKIPX(ev, msg, ...) do { \
65 atf_tc_skip(msg, __VA_ARGS__); \
67 } while(/*CONSTCOND*/0)
70 #define ERRX(ev, msg, ...) errx(ev, msg, __VA_ARGS__)
71 #define ERRX0(ev, msg) errx(ev, msg)
72 #define SKIPX(ev, msg, ...) errx(ev, msg, __VA_ARGS__)
78 #define PORT_V4MAPPED "6666"
79 #define HOST_V4MAPPED "::FFFF:239.1.1.1"
80 #define PORT_V4 "6666"
81 #define HOST_V4 "239.1.1.1"
82 #define PORT_V6 "6666"
83 #define HOST_V6 "FF05:1:0:0:0:0:0:1"
91 addmc(int s, struct addrinfo *ai, bool bug)
95 struct sockaddr_in *s4;
96 struct sockaddr_in6 *s6;
99 switch (ai->ai_family) {
101 s4 = (void *)ai->ai_addr;
102 assert(sizeof(*s4) == ai->ai_addrlen);
103 m4.imr_multiaddr = s4->sin_addr;
104 m4.imr_interface.s_addr = htonl(INADDR_ANY);
105 return setsockopt(s, IPPROTO_IP, IP_ADD_MEMBERSHIP,
108 s6 = (void *)ai->ai_addr;
110 * Linux: Does not support the v6 ioctls on v4 mapped
111 * sockets but it does support the v4 ones and
113 * MacOS/X: Supports the v6 ioctls on v4 mapped sockets,
114 * but does not work and also does not support
115 * the v4 ioctls. So no way to make multicasting
116 * work with mapped addresses.
117 * NetBSD: Supports both and works for both.
119 if (bug && IN6_IS_ADDR_V4MAPPED(&s6->sin6_addr)) {
120 memcpy(&m4.imr_multiaddr, &s6->sin6_addr.s6_addr[12],
121 sizeof(m4.imr_multiaddr));
122 m4.imr_interface.s_addr = htonl(INADDR_ANY);
123 return setsockopt(s, IPPROTO_IP, IP_ADD_MEMBERSHIP,
126 assert(sizeof(*s6) == ai->ai_addrlen);
127 memset(&m6, 0, sizeof(m6));
130 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
131 &ifc, sizeof(ifc)) == -1)
134 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
135 &ifc, sizeof(ifc)) == -1)
137 ifc = 1; /* XXX should pick a proper interface */
138 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_IF, &ifc,
142 ifc = 0; /* Let pick an appropriate interface */
144 m6.ipv6mr_interface = ifc;
145 m6.ipv6mr_multiaddr = s6->sin6_addr;
146 return setsockopt(s, IPPROTO_IPV6, IPV6_JOIN_GROUP,
155 allowv4mapped(int s, struct addrinfo *ai)
157 struct sockaddr_in6 *s6;
160 if (ai->ai_family != AF_INET6)
163 s6 = (void *)ai->ai_addr;
165 if (!IN6_IS_ADDR_V4MAPPED(&s6->sin6_addr))
167 return setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
170 static struct sockaddr_storage ss;
172 connector(int fd, const struct sockaddr *sa, socklen_t slen)
174 assert(sizeof(ss) > slen);
175 memcpy(&ss, sa, slen);
180 show(const char *prefix, const struct message *msg)
182 printf("%10.10s: %zu [%jd.%ld]\n", prefix, msg->seq, (intmax_t)
183 msg->ts.tv_sec, msg->ts.tv_nsec);
187 getsocket(const char *host, const char *port,
188 int (*f)(int, const struct sockaddr *, socklen_t), socklen_t *slen,
191 int e, s, lasterrno = 0;
192 struct addrinfo hints, *ai0, *ai;
193 const char *cause = "?";
195 memset(&hints, 0, sizeof(hints));
196 hints.ai_family = AF_UNSPEC;
197 hints.ai_socktype = SOCK_DGRAM;
198 e = getaddrinfo(host, port, &hints, &ai0);
200 ERRX(EXIT_FAILURE, "Can't resolve %s:%s (%s)", host, port,
204 for (ai = ai0; ai; ai = ai->ai_next) {
205 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
211 if (allowv4mapped(s, ai) == -1) {
212 cause = "allow v4 mapped";
215 if ((*f)(s, ai->ai_addr, ai->ai_addrlen) == -1) {
216 cause = f == bind ? "bind" : "connect";
219 if ((f == bind || f == connector) && addmc(s, ai, bug) == -1) {
220 cause = "join group";
223 *slen = ai->ai_addrlen;
233 ERRX(EXIT_FAILURE, "%s (%s)", cause, strerror(lasterrno));
238 synchronize(const int fd, bool waiter)
248 /* We use poll to avoid lock up when the peer died unexpectedly */
249 r = poll(&pfd, 1, 10000);
251 ERRX(EXIT_FAILURE, "poll (%s)", strerror(errno));
256 if (read(fd, &syncmsg, sizeof(syncmsg)) == -1)
257 ERRX(EXIT_FAILURE, "read (%s)", strerror(errno));
259 if (write(fd, &syncmsg, sizeof(syncmsg)) == -1)
260 ERRX(EXIT_FAILURE, "write (%s)", strerror(errno));
267 sender(const int fd, const char *host, const char *port, size_t n, bool conn,
276 s = getsocket(host, port, conn ? connect : connector, &slen, bug);
278 /* Wait until receiver gets ready. */
279 if (synchronize(fd, true) == -1)
282 for (msg.seq = 0; msg.seq < n; msg.seq++) {
283 #ifdef CLOCK_MONOTONIC
284 if (clock_gettime(CLOCK_MONOTONIC, &msg.ts) == -1)
285 ERRX(EXIT_FAILURE, "clock (%s)", strerror(errno));
288 if (gettimeofday(&tv, NULL) == -1)
289 ERRX(EXIT_FAILURE, "clock (%s)", strerror(errno));
290 msg.ts.tv_sec = tv.tv_sec;
291 msg.ts.tv_nsec = tv.tv_usec * 1000;
294 show("sending", &msg);
295 l = conn ? send(s, &msg, sizeof(msg), 0) :
296 sendto(s, &msg, sizeof(msg), 0, (void *)&ss, slen);
298 ERRX(EXIT_FAILURE, "send (%s)", strerror(errno));
302 /* Wait until receiver finishes its work. */
303 if (synchronize(fd, true) == -1)
310 receiver(const int fd, const char *host, const char *port, size_t n, bool conn,
320 s = getsocket(host, port, bind, &slen, bug);
325 synchronize(fd, false);
327 for (seq = 0; seq < n; seq++) {
328 if (poll(&pfd, 1, 10000) == -1)
329 ERRX(EXIT_FAILURE, "poll (%s)", strerror(errno));
330 l = conn ? recv(s, &msg, sizeof(msg), 0) :
331 recvfrom(s, &msg, sizeof(msg), 0, (void *)&ss, &slen);
333 ERRX(EXIT_FAILURE, "recv (%s)", strerror(errno));
337 ERRX(EXIT_FAILURE, "seq: expect=%zu actual=%zu",
341 /* Tell I'm finished */
342 synchronize(fd, false);
346 run(const char *host, const char *port, size_t n, bool conn, bool bug)
353 if (socketpair(AF_UNIX, SOCK_STREAM, 0, syncfds) == -1)
354 ERRX(EXIT_FAILURE, "socketpair (%s)", strerror(errno));
356 switch ((pid = fork())) {
358 receiver(syncfds[0], host, port, n, conn, bug);
361 ERRX(EXIT_FAILURE, "fork (%s)", strerror(errno));
363 error = sender(syncfds[1], host, port, n, conn, bug);
365 switch (waitpid(pid, &status, WNOHANG)) {
367 ERRX(EXIT_FAILURE, "wait (%s)", strerror(errno));
371 * Receiver is still alive, but we know
376 if (kill(pid, SIGTERM) == -1)
377 ERRX(EXIT_FAILURE, "kill (%s)",
381 if (WIFSIGNALED(status)) {
382 if (WTERMSIG(status) == SIGTERM)
384 "receiver failed and was killed" \
388 "receiver got signaled (%s)",
389 strsignal(WTERMSIG(status)));
390 } else if (WIFEXITED(status)) {
391 if (WEXITSTATUS(status) != 0)
393 "receiver exited with status %d",
394 WEXITSTATUS(status));
397 "receiver exited with unexpected status %d",
408 main(int argc, char *argv[])
410 const char *host, *port;
420 while ((c = getopt(argc, argv, "46bcdmn:")) != -1)
440 host = HOST_V4MAPPED;
441 port = PORT_V4MAPPED;
447 fprintf(stderr, "Usage: %s [-cdm46] [-n <tot>]",
452 run(host, port, n, conn, bug);
458 ATF_TC_HEAD(conninet4, tc)
460 atf_tc_set_md_var(tc, "descr", "Checks connected multicast for ipv4");
463 ATF_TC_BODY(conninet4, tc)
465 run(HOST_V4, PORT_V4, TOTAL, true, false);
468 ATF_TC(connmappedinet4);
469 ATF_TC_HEAD(connmappedinet4, tc)
471 atf_tc_set_md_var(tc, "descr", "Checks connected multicast for mapped ipv4");
474 ATF_TC_BODY(connmappedinet4, tc)
476 run(HOST_V4MAPPED, PORT_V4MAPPED, TOTAL, true, false);
479 ATF_TC(connmappedbuginet4);
480 ATF_TC_HEAD(connmappedbuginet4, tc)
482 atf_tc_set_md_var(tc, "descr", "Checks connected multicast for mapped ipv4 using the v4 ioctls");
485 ATF_TC_BODY(connmappedbuginet4, tc)
487 run(HOST_V4MAPPED, PORT_V4MAPPED, TOTAL, true, true);
491 ATF_TC_HEAD(conninet6, tc)
493 atf_tc_set_md_var(tc, "descr", "Checks connected multicast for ipv6");
496 ATF_TC_BODY(conninet6, tc)
498 run(HOST_V6, PORT_V6, TOTAL, true, false);
502 ATF_TC_HEAD(unconninet4, tc)
504 atf_tc_set_md_var(tc, "descr", "Checks unconnected multicast for ipv4");
507 ATF_TC_BODY(unconninet4, tc)
509 run(HOST_V4, PORT_V4, TOTAL, false, false);
512 ATF_TC(unconnmappedinet4);
513 ATF_TC_HEAD(unconnmappedinet4, tc)
515 atf_tc_set_md_var(tc, "descr", "Checks unconnected multicast for mapped ipv4");
518 ATF_TC_BODY(unconnmappedinet4, tc)
520 run(HOST_V4MAPPED, PORT_V4MAPPED, TOTAL, false, false);
523 ATF_TC(unconnmappedbuginet4);
524 ATF_TC_HEAD(unconnmappedbuginet4, tc)
526 atf_tc_set_md_var(tc, "descr", "Checks unconnected multicast for mapped ipv4 using the v4 ioctls");
529 ATF_TC_BODY(unconnmappedbuginet4, tc)
531 run(HOST_V4MAPPED, PORT_V4MAPPED, TOTAL, false, true);
535 ATF_TC_HEAD(unconninet6, tc)
537 atf_tc_set_md_var(tc, "descr", "Checks unconnected multicast for ipv6");
540 ATF_TC_BODY(unconninet6, tc)
542 run(HOST_V6, PORT_V6, TOTAL, false, false);
548 ATF_TP_ADD_TC(tp, conninet4);
549 ATF_TP_ADD_TC(tp, connmappedinet4);
550 ATF_TP_ADD_TC(tp, connmappedbuginet4);
551 ATF_TP_ADD_TC(tp, conninet6);
552 ATF_TP_ADD_TC(tp, unconninet4);
553 ATF_TP_ADD_TC(tp, unconnmappedinet4);
554 ATF_TP_ADD_TC(tp, unconnmappedbuginet4);
555 ATF_TP_ADD_TC(tp, unconninet6);
557 return atf_no_error();