1 /* $NetBSD: t_tcp.c,v 1.3 2013/10/17 12:53:28 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the NetBSD
18 * Foundation, Inc. and its contributors.
19 * 4. Neither the name of The NetBSD Foundation nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 #ifdef __RCSID
38 __RCSID("$Id: t_tcp.c,v 1.3 2013/10/17 12:53:28 christos Exp $");
39 #endif
40
41 /* Example code. Should block; does with accept not paccept. */
42 /* Original by: Justin Cormack <justin@specialbusrvrervice.com> */
43
44 #include <sys/param.h>
45 #include <sys/types.h>
46 #include <sys/socket.h>
47 #include <netinet/in.h>
48 #include <stdio.h>
49 #include <stdbool.h>
50 #include <unistd.h>
51 #include <fcntl.h>
52 #include <errno.h>
53 #include <err.h>
54 #include <stdlib.h>
55 #include <signal.h>
56
57 #ifdef TEST
58 #define FAIL(msg, ...) err(EXIT_FAILURE, msg, ## __VA_ARGS__)
59 #else
60 #include <atf-c.h>
61 #define FAIL(msg, ...) ATF_CHECK_MSG(0, msg, ## __VA_ARGS__); goto fail
62 #endif
63
64 static void
ding(int al)65 ding(int al)
66 {
67 }
68
69 static void
paccept_block(bool pacceptblock,bool fcntlblock)70 paccept_block(bool pacceptblock, bool fcntlblock)
71 {
72 int srvr = -1, clnt = -1, as = -1;
73 int ok, fl, n;
74 char buf[10];
75 struct sockaddr_in sin, ba;
76 struct sigaction sa;
77
78 srvr = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
79 if (srvr == -1)
80 FAIL("socket");
81
82 memset(&sin, 0, sizeof(sin));
83 sin.sin_family = AF_INET;
84 #ifdef BSD4_4
85 sin.sin_len = sizeof(sin);
86 #endif
87 sin.sin_port = htons(0);
88 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
89 ok = bind(srvr, (const struct sockaddr *)&sin, (socklen_t)sizeof(sin));
90 if (ok == -1)
91 FAIL("bind");
92
93 socklen_t addrlen = sizeof(struct sockaddr_in);
94 ok = getsockname(srvr, (struct sockaddr *)&ba, &addrlen);
95 if (ok == -1)
96 FAIL("getsockname");
97
98 ok = listen(srvr, SOMAXCONN);
99 if (ok == -1)
100 FAIL("listen");
101
102 clnt = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
103 if (clnt == -1)
104 FAIL("socket");
105
106 /* may not connect first time */
107 ok = connect(clnt, (struct sockaddr *) &ba, addrlen);
108 as = paccept(srvr, NULL, NULL, NULL, pacceptblock ? 0 : SOCK_NONBLOCK);
109 ok = connect(clnt, (struct sockaddr *) &ba, addrlen);
110 if (ok == -1 && errno != EISCONN)
111 FAIL("both connects failed");
112
113 #if 0
114 fl = fcntl(srvr, F_GETFL, 0);
115 if (fl == -1)
116 FAIL("fnctl getfl");
117
118 ok = fcntl(srvr, F_SETFL, fl & ~O_NONBLOCK);
119 if (ok == -1)
120 FAIL("fnctl setfl");
121 #endif
122
123 if (as == -1) { /* not true under NetBSD */
124 as = paccept(srvr, NULL, NULL, NULL, pacceptblock ? 0 : SOCK_NONBLOCK);
125 if (as == -1)
126 FAIL("paccept");
127 }
128 if (fcntlblock) {
129 fl = fcntl(as, F_GETFL, 0);
130 if (fl == -1)
131 FAIL("fnctl");
132 if (fl != (O_RDWR|O_NONBLOCK))
133 FAIL("fl 0x%x != 0x%x\n", fl, O_RDWR|O_NONBLOCK);
134 ok = fcntl(as, F_SETFL, fl & ~O_NONBLOCK);
135 if (ok == -1)
136 FAIL("fnctl setfl");
137
138 fl = fcntl(as, F_GETFL, 0);
139 if (fl & O_NONBLOCK)
140 FAIL("fl non blocking after reset");
141 }
142 sa.sa_handler = ding;
143 sa.sa_flags = 0;
144 sigemptyset(&sa.sa_mask);
145 sigaction(SIGALRM, &sa, NULL);
146 alarm(1);
147 n = read(as, buf, 10);
148
149 if (pacceptblock || fcntlblock) {
150 if (n == -1 && errno != EINTR)
151 FAIL("read");
152 } else {
153 if (n != -1 || errno != EWOULDBLOCK)
154 FAIL("read");
155 }
156 return;
157 fail:
158 close(srvr);
159 close(clnt);
160 close(as);
161 }
162
163 #ifndef TEST
164
165 ATF_TC(paccept_reset_nonblock);
ATF_TC_HEAD(paccept_reset_nonblock,tc)166 ATF_TC_HEAD(paccept_reset_nonblock, tc)
167 {
168
169 atf_tc_set_md_var(tc, "descr", "Check that paccept(2) resets "
170 "the non-blocking flag on non-blocking sockets");
171 }
172
ATF_TC_BODY(paccept_reset_nonblock,tc)173 ATF_TC_BODY(paccept_reset_nonblock, tc)
174 {
175 paccept_block(true, false);
176 }
177
178 ATF_TC(fcntl_reset_nonblock);
ATF_TC_HEAD(fcntl_reset_nonblock,tc)179 ATF_TC_HEAD(fcntl_reset_nonblock, tc)
180 {
181
182 atf_tc_set_md_var(tc, "descr", "Check that fcntl(2) resets "
183 "the non-blocking flag on non-blocking sockets");
184 }
185
ATF_TC_BODY(fcntl_reset_nonblock,tc)186 ATF_TC_BODY(fcntl_reset_nonblock, tc)
187 {
188 paccept_block(false, true);
189 }
190
191 ATF_TC(paccept_nonblock);
ATF_TC_HEAD(paccept_nonblock,tc)192 ATF_TC_HEAD(paccept_nonblock, tc)
193 {
194
195 atf_tc_set_md_var(tc, "descr", "Check that fcntl(2) resets "
196 "the non-blocking flag on non-blocking sockets");
197 }
198
ATF_TC_BODY(paccept_nonblock,tc)199 ATF_TC_BODY(paccept_nonblock, tc)
200 {
201 paccept_block(false, false);
202 }
203
ATF_TP_ADD_TCS(tp)204 ATF_TP_ADD_TCS(tp)
205 {
206
207 ATF_TP_ADD_TC(tp, paccept_reset_nonblock);
208 ATF_TP_ADD_TC(tp, fcntl_reset_nonblock);
209 ATF_TP_ADD_TC(tp, paccept_nonblock);
210 return atf_no_error();
211 }
212 #else
213 int
main(int argc,char * argv[])214 main(int argc, char *argv[])
215 {
216 paccept_block(false);
217 paccept_block(true);
218 return 0;
219 }
220 #endif
221