2 * Copyright (c) 2005 Robert N. M. Watson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/types.h>
28 #include <sys/socket.h>
30 #include <netinet/in.h>
32 #include <arpa/inet.h>
42 * Regression test for multicast sockets and options:
44 * - Check the defaults for ttl, if, and loopback. Make sure they can be set
47 * - Check that adding and removing multicast addresses seems to work.
49 * - Send a test message over loop back multicast and make sure it arrives.
53 * Would be nice to use BPF or if_tap to actually check packet contents and
54 * layout, make sure that the ttl is set right, etc.
56 * Would be nice if attempts to use multicast options on TCP sockets returned
57 * an error, as the docs suggest it might.
61 #define WARN_SUCCESS 0x00000001 /* Set for TCP to warn on success. */
63 #define WARN_SUCCESS 0x00000000
67 * Multicast test address, picked arbitrarily. Will be used with the
70 #define TEST_MADDR "224.100.100.100"
73 * Test that a given IP socket option (optname) has a default value of
74 * 'defaultv', that we can set it to 'modifiedv', and use 'fakev' as a dummy
75 * value that shouldn't be returned at any point during the tests. Perform
76 * the tests on the raw socket, tcp socket, and upd socket passed.
77 * 'optstring' is used in printing warnings and errors as needed.
80 test_u_char(int optname, const char *optstring, u_char defaultv,
81 u_char modifiedv, u_char fakev, const char *socktype, int sock,
89 * Check that we read back the expected default.
94 ret = getsockopt(sock, IPPROTO_IP, optname, &uc, &socklen);
96 err(-1, "FAIL: getsockopt(%s, IPPROTO_IP, %s)",
98 if (ret == 0 && (flags & WARN_SUCCESS))
99 warnx("WARN: getsockopt(%s, IPPROTO_IP, %s) returned 0",
100 socktype, optstring);
102 errx(-1, "FAIL: getsockopt(%s, IPPROTO_IP, %s) default is "
103 "%d not %d", socktype, optstring, uc, defaultv);
106 * Set to a modifiedv value, read it back and make sure it got there.
109 ret = setsockopt(sock, IPPROTO_IP, optname, &uc, sizeof(uc));
111 err(-1, "FAIL: setsockopt(%s, IPPROTO_IP, %s)",
112 socktype, optstring);
113 if (ret == 0 && (flags & WARN_SUCCESS))
114 warnx("WARN: setsockopt(%s, IPPROTO_IP, %s) returned 0",
115 socktype, optstring);
118 socklen = sizeof(uc);
119 ret = getsockopt(sock, IPPROTO_IP, optname, &uc, &socklen);
121 err(-1, "FAIL: getsockopt(%s, IPPROTO_IP, %s)",
122 socktype, optstring);
123 if (ret == 0 && (flags & WARN_SUCCESS))
124 warnx("WARN: getsockopt(%s, IPPROTO_IP, %s) returned 0",
125 socktype, optstring);
127 errx(-1, "FAIL: getsockopt(%s, IPPROTO_IP, %s) set value is "
128 "%d not %d", socktype, optstring, uc, modifiedv);
132 * test_in_addr() is like test_u_char(), only it runs on a struct in_addr
136 test_in_addr(int optname, const char *optstring, struct in_addr defaultv,
137 struct in_addr modifiedv, struct in_addr fakev, const char *socktype,
145 * Check that we read back the expected default.
148 socklen = sizeof(ia);
150 ret = getsockopt(sock, IPPROTO_IP, optname, &ia, &socklen);
152 err(-1, "FAIL: getsockopt(%s, IPPROTO_IP, %s)",
153 socktype, optstring);
154 if (ret == 0 && (flags & WARN_SUCCESS))
155 warnx("WARN: getsockopt(%s, IPPROTO_IP, %s) returned 0",
156 socktype, optstring);
157 if (memcmp(&ia, &defaultv, sizeof(struct in_addr)))
158 errx(-1, "FAIL: getsockopt(%s, IPPROTO_IP, %s) default is "
159 "%s not %s", socktype, optstring, inet_ntoa(ia),
160 inet_ntoa(defaultv));
163 * Set to a modifiedv value, read it back and make sure it got there.
166 ret = setsockopt(sock, IPPROTO_IP, optname, &ia, sizeof(ia));
168 err(-1, "FAIL: setsockopt(%s, IPPROTO_IP, %s)",
169 socktype, optstring);
170 if (ret == 0 && (flags & WARN_SUCCESS))
171 warnx("WARN: setsockopt(%s, IPPROTO_IP, %s) returned 0",
172 socktype, optstring);
175 socklen = sizeof(ia);
176 ret = getsockopt(sock, IPPROTO_IP, optname, &ia, &socklen);
178 err(-1, "FAIL: getsockopt(%s, IPPROTO_IP, %s)",
179 socktype, optstring);
180 if (ret == 0 && (flags & WARN_SUCCESS))
181 warnx("WARN: getsockopt(%s, IPPROTO_IP, %s) returned 0",
182 socktype, optstring);
183 if (memcmp(&ia, &modifiedv, sizeof(struct in_addr)))
184 errx(-1, "FAIL: getsockopt(%s, IPPROTO_IP, %s) set value is "
185 "%s not %s", socktype, optstring, inet_ntoa(ia),
186 inet_ntoa(modifiedv));
190 test_ttl(int raw_sock, int tcp_sock, int udp_sock)
193 test_u_char(IP_MULTICAST_TTL, "IP_MULTICAST_TTL", 1, 2, 243,
194 "raw_sock", raw_sock, 0);
195 test_u_char(IP_MULTICAST_TTL, "IP_MULTICAST_TTL", 1, 2, 243,
196 "tcp_sock", tcp_sock, WARN_SUCCESS);
197 test_u_char(IP_MULTICAST_TTL, "IP_MULTICAST_TTL", 1, 2, 243,
198 "udp_sock", udp_sock, 0);
202 test_loop(int raw_sock, int tcp_sock, int udp_sock)
205 test_u_char(IP_MULTICAST_LOOP, "IP_MULTICAST_LOOP", 1, 0, 243,
206 "raw_sock", raw_sock, 0);
207 test_u_char(IP_MULTICAST_LOOP, "IP_MULTICAST_LOOP", 1, 0, 243,
208 "tcp_sock", tcp_sock, WARN_SUCCESS);
209 test_u_char(IP_MULTICAST_LOOP, "IP_MULTICAST_LOOP", 1, 0, 243,
210 "udp_sock", udp_sock, 0);
214 test_if(int raw_sock, int tcp_sock, int udp_sock)
216 struct in_addr defaultv, modifiedv, fakev;
218 defaultv.s_addr = inet_addr("0.0.0.0");
220 /* Should be valid on all hosts. */
221 modifiedv.s_addr = inet_addr("127.0.0.1");
223 /* Should not happen. */
224 fakev.s_addr = inet_addr("255.255.255.255");
226 test_in_addr(IP_MULTICAST_IF, "IP_MULTICAST_IF", defaultv, modifiedv,
227 fakev, "raw_sock", raw_sock, 0);
228 test_in_addr(IP_MULTICAST_IF, "IP_MULTICAST_IF", defaultv, modifiedv,
229 fakev, "tcp_sock", tcp_sock, WARN_SUCCESS);
230 test_in_addr(IP_MULTICAST_IF, "IP_MULTICAST_IF", defaultv, modifiedv,
231 fakev, "udp_sock", udp_sock, 0);
235 * Add a multicast address to an interface. Warn if appropriate. No query
236 * interface so can't check if it's there directly; instead we have to try
237 * to add it a second time and make sure we get back EADDRINUSE.
240 test_add_multi(int sock, const char *socktype, struct ip_mreq imr,
246 ret = setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &imr,
249 strlcpy(buf, inet_ntoa(imr.imr_multiaddr), 128);
250 err(-1, "FAIL: setsockopt(%s, IPPROTO_IP, IP_ADD_MEMBERSHIP "
251 "%s, %s)", socktype, buf, inet_ntoa(imr.imr_interface));
253 if (ret == 0 && (flags & WARN_SUCCESS)) {
254 strlcpy(buf, inet_ntoa(imr.imr_multiaddr), 128);
255 warnx("WARN: setsockopt(%s, IPPROTO_IP, IP_ADD_MEMBERSHIP "
256 "%s, %s) returned 0", socktype, buf,
257 inet_ntoa(imr.imr_interface));
260 /* Try to add a second time to make sure it got there. */
261 ret = setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &imr,
264 strlcpy(buf, inet_ntoa(imr.imr_multiaddr), 128);
265 err(-1, "FAIL: setsockopt(%s, IPPROTO_IP, IP_ADD_MEMBERSHIP "
266 "%s, %s) dup returned 0", socktype, buf,
267 inet_ntoa(imr.imr_interface));
269 if (ret < 0 && errno != EADDRINUSE) {
270 strlcpy(buf, inet_ntoa(imr.imr_multiaddr), 128);
271 err(-1, "FAIL: setsockopt(%s, IPPROTO_IP, IP_ADD_MEMBERSHIP "
272 "%s, %s)", socktype, buf, inet_ntoa(imr.imr_interface));
277 * Drop a multicast address from an interface. Warn if appropriate. No
278 * query interface so can't check if it's gone directly; instead we have to
279 * try to drop it a second time and make sure we get back EADDRNOTAVAIL.
282 test_drop_multi(int sock, const char *socktype, struct ip_mreq imr,
288 ret = setsockopt(sock, IPPROTO_IP, IP_DROP_MEMBERSHIP, &imr,
291 strlcpy(buf, inet_ntoa(imr.imr_multiaddr), 128);
292 err(-1, "FAIL: setsockopt(%s, IPPROTO_IP, IP_DROP_MEMBERSHIP "
293 "%s, %s)", socktype, buf, inet_ntoa(imr.imr_interface));
295 if (ret == 0 && (flags & WARN_SUCCESS)) {
296 strlcpy(buf, inet_ntoa(imr.imr_multiaddr), 128);
297 warnx("WARN: setsockopt(%s, IPPROTO_IP, IP_DROP_MEMBERSHIP "
298 "%s, %s) returned 0", socktype, buf,
299 inet_ntoa(imr.imr_interface));
302 /* Try a second time to make sure it's gone. */
303 ret = setsockopt(sock, IPPROTO_IP, IP_DROP_MEMBERSHIP, &imr,
306 strlcpy(buf, inet_ntoa(imr.imr_multiaddr), 128);
307 err(-1, "FAIL: setsockopt(%s, IPPROTO_IP, IP_DROP_MEMBERSHIP "
308 "%s, %s) returned 0", socktype, buf,
309 inet_ntoa(imr.imr_interface));
311 if (ret < 0 && errno != EADDRNOTAVAIL) {
312 strlcpy(buf, inet_ntoa(imr.imr_multiaddr), 128);
313 err(-1, "FAIL: setsockopt(%s, IPPROTO_IP, IP_DROP_MEMBERSHIP "
314 "%s, %s)", socktype, buf, inet_ntoa(imr.imr_interface));
319 * Should really also test trying to add an invalid address, delete one
320 * that's not there, etc.
323 test_addr(int raw_sock, int tcp_sock, int udp_sock)
328 imr.imr_multiaddr.s_addr = inet_addr(TEST_MADDR);
330 /* Localhost should be OK. */
331 imr.imr_interface.s_addr = inet_addr("127.0.0.1");
333 test_add_multi(raw_sock, "raw_sock", imr, 0);
334 test_drop_multi(raw_sock, "raw_sock", imr, 0);
336 test_add_multi(tcp_sock, "raw_sock", imr, WARN_SUCCESS);
337 test_drop_multi(tcp_sock, "raw_sock", imr, WARN_SUCCESS);
339 test_add_multi(udp_sock, "raw_sock", imr, 0);
340 test_drop_multi(udp_sock, "raw_sock", imr, 0);
344 * Test an actual simple UDP message - send a single byte to an address we're
345 * subscribed to, and hope to get it back. We create a new UDP socket for
346 * this purpose because we will need to bind it.
348 #define UDP_PORT 5012
352 struct sockaddr_in sin;
354 struct in_addr if_addr;
359 sock = socket(PF_INET, SOCK_DGRAM, 0);
361 err(-1, "FAIL: test_udp: socket(PF_INET, SOCK_DGRAM)");
363 if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0)
364 err(-1, "FAIL: test_udp: fcntl(F_SETFL, O_NONBLOCK)");
366 bzero(&sin, sizeof(sin));
367 sin.sin_len = sizeof(sin);
368 sin.sin_family = AF_INET;
369 sin.sin_port = htons(UDP_PORT);
370 sin.sin_addr.s_addr = inet_addr(TEST_MADDR);
372 if (bind(sock, (struct sockaddr *)&sin, sizeof(sin)) < 0)
373 err(-1, "FAIL: test_udp: bind(udp_sock, 127.0.0.1:%d",
377 imr.imr_multiaddr.s_addr = inet_addr(TEST_MADDR);
379 /* Localhost should be OK. */
380 imr.imr_interface.s_addr = inet_addr("127.0.0.1");
383 * Tell socket what interface to send on -- use localhost.
385 if_addr.s_addr = inet_addr("127.0.0.1");
386 if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_IF, &if_addr,
387 sizeof(if_addr)) < 0)
388 err(-1, "test_udp: setsockopt(IPPROTO_IP, IP_MULTICAST_IF)");
390 test_add_multi(sock, "udp_sock", imr, 0);
392 bzero(&sin, sizeof(sin));
393 sin.sin_len = sizeof(sin);
394 sin.sin_family = AF_INET;
395 sin.sin_port = htons(UDP_PORT);
396 sin.sin_addr.s_addr = inet_addr(TEST_MADDR);
399 len = sizeof(message);
400 len = sendto(sock, &message, len, 0, (struct sockaddr *)&sin,
403 err(-1, "test_udp: sendto");
405 if (len != sizeof(message))
406 errx(-1, "test_udp: sendto: expected to send %d, instead %d",
407 sizeof(message), len);
411 len = recvfrom(sock, &message, sizeof(message), 0,
412 (struct sockaddr *)&sin, &len);
414 err(-1, "test_udp: recvfrom");
416 if (len != sizeof(message))
417 errx(-1, "test_udp: recvfrom: len %d != message len %d",
418 len, sizeof(message));
421 errx(-1, "test_udp: recvfrom: expected 'A', got '%c'",
424 test_drop_multi(sock, "udp_sock", imr, 0);
431 main(int argc, char *argv[])
433 int raw_sock, tcp_sock, udp_sock;
436 errx(-1, "FAIL: root privilege required");
438 raw_sock = socket(PF_INET, SOCK_RAW, 0);
440 err(-1, "FAIL: socket(PF_INET, SOCK_RAW)");
442 tcp_sock = socket(PF_INET, SOCK_STREAM, 0);
444 err(-1, "FAIL: socket(PF_INET, SOCK_STREAM)");
446 udp_sock = socket(PF_INET, SOCK_DGRAM, 0);
448 err(-1, "FAIL: socket(PF_INET, SOCK_DGRAM)");
450 test_ttl(raw_sock, tcp_sock, udp_sock);
451 test_loop(raw_sock, tcp_sock, udp_sock);
452 test_if(raw_sock, tcp_sock, udp_sock);
453 test_addr(raw_sock, tcp_sock, udp_sock);