1 /*-
2 * Copyright (c) 2008 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/socket.h>
29 #include <sys/un.h>
30
31 #include <netinet/in.h>
32
33 #include <arpa/inet.h>
34
35 #include <err.h>
36 #include <errno.h>
37 #include <fcntl.h>
38 #include <stdio.h>
39 #include <string.h>
40 #include <unistd.h>
41
42 /*
43 * The UDP code allows transmitting zero-byte datagrams, but are they
44 * received?
45 */
46
47 #define THEPORT 9543 /* Arbitrary. */
48
49 static void
usage(void)50 usage(void)
51 {
52
53 errx(-1, "no arguments allowed\n");
54 }
55
56 static void
test(int domain,const char * domainstr,struct sockaddr * sa,socklen_t salen)57 test(int domain, const char *domainstr, struct sockaddr *sa, socklen_t salen)
58 {
59 int sock_send, sock_receive;
60 ssize_t size;
61
62 sock_send = socket(domain, SOCK_DGRAM, 0);
63 if (sock_send < 0)
64 err(-1, "socket(%s, SOCK_DGRAM, 0)", domainstr);
65
66 sock_receive = socket(domain, SOCK_DGRAM, 0);
67 if (sock_receive < 0)
68 err(-1, "socket(%s, SOCK_DGRAM, 0)", domainstr);
69
70 if (bind(sock_receive, sa, salen) < 0)
71 err(-1, "Protocol %s bind(sock_receive)", domainstr);
72 if (fcntl(sock_receive, F_SETFL, O_NONBLOCK, 1) < 0)
73 err(-1, "Protocll %s fcntl(sock_receive, FL_SETFL, "
74 "O_NONBLOCK)", domainstr);
75
76 if (connect(sock_send, sa, salen) < 0)
77 err(-1, "Protocol %s connect(sock_send)", domainstr);
78
79 size = recv(sock_receive, NULL, 0, 0);
80 if (size > 0)
81 errx(-1, "Protocol %s recv(sock_receive, NULL, 0) before: %zd",
82 domainstr, size);
83 else if (size < 0)
84 err(-1, "Protocol %s recv(sock_receive, NULL, 0) before",
85 domainstr);
86
87 size = send(sock_send, NULL, 0, 0);
88 if (size < 0)
89 err(-1, "Protocol %s send(sock_send, NULL, 0)", domainstr);
90
91 (void)sleep(1);
92 size = recv(sock_receive, NULL, 0, 0);
93 if (size < 0)
94 err(-1, "Protocol %s recv(sock_receive, NULL, 0) test",
95 domainstr);
96
97 size = recv(sock_receive, NULL, 0, 0);
98 if (size > 0)
99 errx(-1, "Protocol %s recv(sock_receive, NULL, 0) after: %zd",
100 domainstr, size);
101 else if (size < 0)
102 err(-1, "Protocol %s recv(sock_receive, NULL, 0) after",
103 domainstr);
104 }
105
106 int
main(int argc,__unused char * argv[])107 main(int argc, __unused char *argv[])
108 {
109 struct sockaddr_un sun;
110 struct sockaddr_in6 sin6;
111 struct sockaddr_in sin;
112 struct in6_addr loopback6addr = IN6ADDR_LOOPBACK_INIT;
113
114 if (argc != 1)
115 usage();
116
117 bzero(&sin, sizeof(sin));
118 sin.sin_len = sizeof(sin);
119 sin.sin_family = AF_INET;
120 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
121 sin.sin_port = htons(THEPORT);
122
123 test(PF_INET, "PF_INET", (struct sockaddr *)&sin, sizeof(sin));
124
125 bzero(&sin6, sizeof(sin6));
126 sin6.sin6_len = sizeof(sin6);
127 sin6.sin6_family = AF_INET6;
128 sin6.sin6_addr = loopback6addr;
129 sin6.sin6_port = htons(THEPORT);
130
131 test(PF_INET6, "PF_INET6", (struct sockaddr *)&sin6, sizeof(sin6));
132
133 bzero(&sun, sizeof(sun));
134 sun.sun_len = sizeof(sun);
135 sun.sun_family = AF_LOCAL;
136 strlcpy(sun.sun_path, "/tmp/udpzerosize-socket", sizeof(sun.sun_path));
137 if (unlink(sun.sun_path) < 0 && errno != ENOENT)
138 err(-1, "unlink: %s", sun.sun_path);
139
140 test(PF_LOCAL, "PF_LOCAL", (struct sockaddr *)&sun, sizeof(sun));
141
142 return (0);
143 }
144