1 /*	$OpenBSD: connect.c,v 1.3 2017/05/27 16:04:38 bluhm Exp $	*/
2 /*
3  * Federico G. Schwindt <fgsch@openbsd.org>, 2011. Public Domain.
4  */
5 #include <sys/types.h>
6 #include <sys/socket.h>
7 #include <netinet/in.h>
8 #include <pthread.h>
9 #include <signal.h>
10 #include <unistd.h>
11 #include "test.h"
12 
13 volatile sig_atomic_t hits = 0;
14 
15 void
16 handler(int sig)
17 {
18 	hits++;
19 }
20 
21 void *
22 thr_connect(void *arg)
23 {
24 	struct sockaddr_in sa;
25 	socklen_t len;
26 	int l, s;
27 
28 	/* Create a bound TCP socket without listen on loopback. */
29 	CHECKe(l = socket(AF_INET, SOCK_STREAM, 0));
30 	bzero(&sa, sizeof(sa));
31 	sa.sin_family = AF_INET;
32 	sa.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
33 	CHECKe(bind(l, (struct sockaddr *)&sa, sizeof(sa)));
34 	len = sizeof(sa);
35 	CHECKe(getsockname(l, (struct sockaddr *)&sa, &len));
36 
37 	/* Connect to the non listen socket will not reply to SYN. */
38 	CHECKe(s = socket(AF_INET, SOCK_STREAM, 0));
39 	ASSERT(connect(s, (struct sockaddr *)&sa, sizeof(sa)) == -1);
40 	int err = errno;
41 	ASSERT(connect(s, (struct sockaddr *)&sa, sizeof(sa)) == -1);
42 	ASSERT(errno == EALREADY);
43 	return ((caddr_t)NULL + err);
44 }
45 
46 int
47 main(int argc, char **argv)
48 {
49 	struct sigaction sa;
50 	pthread_t tid;
51 	void *retval;
52 
53 	bzero(&sa, sizeof(sa));
54 	sa.sa_handler = handler;
55 	sa.sa_flags = SA_RESTART;
56 	CHECKe(sigaction(SIGUSR1, &sa, NULL));
57 
58 	CHECKr(pthread_create(&tid, NULL, thr_connect, NULL));
59 	sleep(2);
60 
61 	/* Should interrupt it. */
62 	CHECKr(pthread_kill(tid, SIGUSR1));
63 	sleep(1);
64 
65 	CHECKr(pthread_join(tid, &retval));
66 	ASSERT(retval == (void *)EINTR);
67 	ASSERT(hits == 1);
68 	SUCCEED;
69 }
70