1 /* $OpenBSD: setsockopt1.c,v 1.6 2012/07/11 09:14:46 guenther Exp $ */
2 /*
3 * Federico G. Schwindt <fgsch@openbsd.org>, 2009. Public Domain.
4 */
5
6 #include <sys/types.h>
7 #include <sys/time.h>
8 #include <sys/socket.h>
9 #include <netinet/in.h>
10 #include <err.h>
11 #include <fcntl.h>
12 #include <netdb.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <unistd.h>
16 #include "test.h"
17
18 /* twice the resolution of the monotonic clock */
19 struct timespec mono_res_times2;
20
21 static void
alarm_handler(int sig)22 alarm_handler(int sig)
23 {
24 _exit(NOTOK);
25 }
26
27 void
check_timeout(int s,int sec,const struct timespec * to)28 check_timeout(int s, int sec, const struct timespec *to)
29 {
30 struct timespec t1, t2, e;
31 char buf[BUFSIZ];
32
33 ASSERT(signal(SIGALRM, alarm_handler) != SIG_ERR);
34 CHECKe(alarm(sec));
35 CHECKe(clock_gettime(CLOCK_MONOTONIC, &t1));
36 ASSERT(read(s, &buf, sizeof(buf)) == -1);
37 CHECKe(clock_gettime(CLOCK_MONOTONIC, &t2));
38 ASSERT(errno == EAGAIN);
39 timespecsub(&t2, &t1, &e);
40
41 /*
42 * verify that the difference between the duration and the
43 * timeout is less than the resolution of the clock
44 */
45 ASSERT(timespeccmp(&e, to, >));
46 timespecsub(&e, to, &t1);
47 ASSERT(timespeccmp(&t1, &mono_res_times2, <=));
48 }
49
50 static void *
sock_connect(void * arg)51 sock_connect(void *arg)
52 {
53 struct sockaddr_in sin;
54 struct timeval to;
55 struct timespec ts;
56 int s, s2, s3;
57
58 CHECKe(clock_getres(CLOCK_MONOTONIC, &mono_res_times2));
59 timespecadd(&mono_res_times2, &mono_res_times2, &mono_res_times2);
60 CHECKe(s = socket(AF_INET, SOCK_STREAM, 0));
61 CHECKe(s2 = dup(s));
62 CHECKe(s3 = fcntl(s, F_DUPFD, s));
63 bzero(&sin, sizeof(sin));
64 sin.sin_family = AF_INET;
65 sin.sin_len = sizeof(sin);
66 sin.sin_port = htons(6543);
67 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
68 CHECKe(connect(s, (struct sockaddr *)&sin, sizeof(sin)));
69
70 to.tv_sec = 2;
71 to.tv_usec = 0.5 * 1e6;
72 TIMEVAL_TO_TIMESPEC(&to, &ts);
73 CHECKe(setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to)));
74 check_timeout(s, 3, &ts);
75 check_timeout(s2, 3, &ts);
76 check_timeout(s3, 3, &ts);
77
78 to.tv_sec = 1;
79 to.tv_usec = 0.5 * 1e6;
80 TIMEVAL_TO_TIMESPEC(&to, &ts);
81 CHECKe(setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to)));
82 check_timeout(s, 2, &ts);
83 check_timeout(s2, 2, &ts);
84 check_timeout(s3, 2, &ts);
85 return (NULL);
86 }
87
88 static void *
sock_accept(void * arg)89 sock_accept(void *arg)
90 {
91 pthread_t connect_thread;
92 struct sockaddr_in sin;
93 int s;
94
95 CHECKe(s = socket(AF_INET, SOCK_STREAM, 0));
96 bzero(&sin, sizeof(sin));
97 sin.sin_family = AF_INET;
98 sin.sin_len = sizeof(sin);
99 sin.sin_port = htons(6543);
100 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
101 CHECKe(bind(s, (struct sockaddr *)&sin, sizeof(sin)));
102 CHECKe(listen(s, 2));
103
104 CHECKr(pthread_create(&connect_thread, NULL, sock_connect, NULL));
105 CHECKr(pthread_join(connect_thread, NULL));
106 return (NULL);
107 }
108
109 int
main(int argc,char ** argv)110 main(int argc, char **argv)
111 {
112 pthread_t accept_thread;
113
114 CHECKr(pthread_create(&accept_thread, NULL, sock_accept, NULL));
115 CHECKr(pthread_join(accept_thread, NULL));
116 SUCCEED;
117 }
118