1 /*
2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
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 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "tests.h"
29
30 #include <assert.h>
31 #include <errno.h>
32 #include <string.h>
33 #include <unistd.h>
34 #include <sys/socket.h>
35 #include <asm/unistd.h>
36
37 #ifndef __NR_send
38 # define __NR_send -1
39 #endif
40 #define SC_send 9
41
42 #ifndef __NR_recv
43 # define __NR_recv -1
44 #endif
45 #define SC_recv 10
46
47 static int
sys_send(int sockfd,const void * buf,size_t len,int flags)48 sys_send(int sockfd, const void *buf, size_t len, int flags)
49 {
50 int rc = socketcall(__NR_send, SC_send,
51 sockfd, (long) buf, len, flags, 0);
52 if (rc < 0 && ENOSYS == errno)
53 perror_msg_and_skip("send");
54 return rc;
55 }
56
57 static int
sys_recv(int sockfd,const void * buf,size_t len,int flags)58 sys_recv(int sockfd, const void *buf, size_t len, int flags)
59 {
60 int rc = socketcall(__NR_recv, SC_recv,
61 sockfd, (long) buf, len, flags, 0);
62 if (rc < 0 && ENOSYS == errno)
63 perror_msg_and_skip("recv");
64 return rc;
65 }
66
67 static void
transpose(char * str,const size_t len)68 transpose(char *str, const size_t len)
69 {
70 size_t i;
71
72 for (i = 0; i < len / 2; ++i) {
73 char c = str[i];
74 str[i] = str[len - 1 - i];
75 str[len - 1 - i] = c;
76 }
77 }
78
79 int
main(int ac,char ** av)80 main(int ac, char **av)
81 {
82 assert(ac == 2);
83 const size_t len = strlen(av[1]);
84 assert(len);
85 char *const buf0 = tail_alloc(len);
86 char *const buf1 = tail_alloc(len);
87 memcpy(buf0, av[1], len);
88
89 (void) close(0);
90 (void) close(1);
91
92 int sv[2];
93 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
94 perror_msg_and_skip("socketpair");
95
96 assert(sys_send(0, buf0, len, MSG_DONTROUTE) == (int) len);
97 assert(sys_recv(1, buf1, len, MSG_WAITALL) == (int) len);
98
99 transpose(buf1, len);
100 assert(sys_send(1, buf1, len, MSG_DONTROUTE) == (int) len);
101 if (close(1))
102 perror_msg_and_fail("close(1)");
103
104 assert(sys_recv(0, buf0, len, MSG_WAITALL) == (int) len);
105 if (close(0))
106 perror_msg_and_fail("close(0)");
107 assert(sys_recv(0, NULL, len, MSG_DONTWAIT) == -1);
108
109 return 0;
110 }
111