1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2023 Gleb Smirnoff <glebius@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/socket.h>
29 #include <netinet/in.h>
30 #include <errno.h>
31 #include <fcntl.h>
32 #include <string.h>
33
34 #include <atf-c.h>
35
36 static int
tcp4_listensock(struct sockaddr_in * sin)37 tcp4_listensock(struct sockaddr_in *sin)
38 {
39 int l;
40
41 ATF_REQUIRE((l = socket(PF_INET, SOCK_STREAM, 0)) > 0);
42 ATF_REQUIRE(setsockopt(l, SOL_SOCKET, SO_REUSEADDR, &(socklen_t){1},
43 sizeof(int)) == 0);
44 *sin = (struct sockaddr_in){
45 .sin_len = sizeof(sin),
46 .sin_family = AF_INET,
47 .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
48 };
49 ATF_REQUIRE(bind(l, (struct sockaddr *)sin, sizeof(*sin)) == 0);
50 ATF_REQUIRE(getsockname(l, (struct sockaddr *)sin,
51 &(socklen_t){ sizeof(*sin) }) == 0);
52 ATF_REQUIRE(listen(l, -1) == 0);
53
54 return (l);
55 }
56
57 static int
tcp4_clientsock(struct sockaddr_in * sin)58 tcp4_clientsock(struct sockaddr_in *sin)
59 {
60 int s;
61
62 ATF_REQUIRE((s = socket(PF_INET, SOCK_STREAM, 0)) > 0);
63 ATF_REQUIRE(connect(s, (struct sockaddr *)sin, sizeof(*sin)) == 0);
64
65 return (s);
66 }
67
68 ATF_TC_WITHOUT_HEAD(tcp4_zerolen);
ATF_TC_BODY(tcp4_zerolen,tc)69 ATF_TC_BODY(tcp4_zerolen, tc)
70 {
71 static char canary[sizeof(struct sockaddr_in)] =
72 { [0 ... sizeof(struct sockaddr_in) - 1] = 0xa };
73 struct sockaddr_in sin, ret;
74 socklen_t salen;
75 int l;
76
77 l = tcp4_listensock(&sin);
78 (void )tcp4_clientsock(&sin);
79
80 memcpy(&ret, &canary, sizeof(ret));
81 salen = 0;
82 ATF_REQUIRE(accept(l, (struct sockaddr *)&ret, &salen) > 0);
83 ATF_REQUIRE(memcmp(&ret, &canary, sizeof(ret)) == 0);
84 ATF_REQUIRE(salen == sizeof(struct sockaddr_in));
85 /* Note: Linux will block for connection here, we fail immediately. */
86 ATF_REQUIRE(accept(l, (struct sockaddr *)&ret, NULL) == -1);
87 ATF_REQUIRE(errno == EFAULT);
88 }
89
90 ATF_TC_WITHOUT_HEAD(tcp4);
ATF_TC_BODY(tcp4,tc)91 ATF_TC_BODY(tcp4, tc)
92 {
93 struct sockaddr_in sin, ret;
94 socklen_t salen;
95 int l, s;
96
97 l = tcp4_listensock(&sin);
98 s = tcp4_clientsock(&sin);
99
100 salen = sizeof(struct sockaddr_in) + 2;
101 ATF_REQUIRE(accept(l, (struct sockaddr *)&ret, &salen) > 0);
102 ATF_REQUIRE(salen == sizeof(struct sockaddr_in));
103 ATF_REQUIRE(getsockname(s, (struct sockaddr *)&sin,
104 &(socklen_t){ sizeof(sin) }) == 0);
105 ATF_REQUIRE(memcmp(&ret, &sin, sizeof(sin)) == 0);
106 }
107
108 ATF_TC_WITHOUT_HEAD(tcp4_noaddr);
ATF_TC_BODY(tcp4_noaddr,tc)109 ATF_TC_BODY(tcp4_noaddr, tc)
110 {
111 struct sockaddr_in sin;
112 int l;
113
114 l = tcp4_listensock(&sin);
115 (void )tcp4_clientsock(&sin);
116
117 ATF_REQUIRE(accept(l, NULL, NULL) > 0);
118 }
119
ATF_TP_ADD_TCS(tp)120 ATF_TP_ADD_TCS(tp)
121 {
122 ATF_TP_ADD_TC(tp, tcp4);
123 ATF_TP_ADD_TC(tp, tcp4_noaddr);
124 ATF_TP_ADD_TC(tp, tcp4_zerolen);
125
126 return (atf_no_error());
127 }
128