1 // SPDX-License-Identifier: GPL-2.0
2 #include <stdio.h>
3 #include <errno.h>
4 #include <unistd.h>
5 #include <string.h>
6 #include <sys/types.h>
7 #include <sys/socket.h>
8 #include <netinet/in.h>
9 
10 #include "../kselftest.h"
11 
12 struct socket_testcase {
13 	int	domain;
14 	int	type;
15 	int	protocol;
16 
17 	/* 0    = valid file descriptor
18 	 * -foo = error foo
19 	 */
20 	int	expect;
21 
22 	/* If non-zero, accept EAFNOSUPPORT to handle the case
23 	 * of the protocol not being configured into the kernel.
24 	 */
25 	int	nosupport_ok;
26 };
27 
28 static struct socket_testcase tests[] = {
29 	{ AF_MAX,  0,           0,           -EAFNOSUPPORT,    0 },
30 	{ AF_INET, SOCK_STREAM, IPPROTO_TCP, 0,                1  },
31 	{ AF_INET, SOCK_DGRAM,  IPPROTO_TCP, -EPROTONOSUPPORT, 1  },
32 	{ AF_INET, SOCK_DGRAM,  IPPROTO_UDP, 0,                1  },
33 	{ AF_INET, SOCK_STREAM, IPPROTO_UDP, -EPROTONOSUPPORT, 1  },
34 };
35 
36 #define ERR_STRING_SZ	64
37 
38 static int run_tests(void)
39 {
40 	char err_string1[ERR_STRING_SZ];
41 	char err_string2[ERR_STRING_SZ];
42 	int i, err;
43 
44 	err = 0;
45 	for (i = 0; i < ARRAY_SIZE(tests); i++) {
46 		struct socket_testcase *s = &tests[i];
47 		int fd;
48 
49 		fd = socket(s->domain, s->type, s->protocol);
50 		if (fd < 0) {
51 			if (s->nosupport_ok &&
52 			    errno == EAFNOSUPPORT)
53 				continue;
54 
55 			if (s->expect < 0 &&
56 			    errno == -s->expect)
57 				continue;
58 
59 			strerror_r(-s->expect, err_string1, ERR_STRING_SZ);
60 			strerror_r(errno, err_string2, ERR_STRING_SZ);
61 
62 			fprintf(stderr, "socket(%d, %d, %d) expected "
63 				"err (%s) got (%s)\n",
64 				s->domain, s->type, s->protocol,
65 				err_string1, err_string2);
66 
67 			err = -1;
68 			break;
69 		} else {
70 			close(fd);
71 
72 			if (s->expect < 0) {
73 				strerror_r(errno, err_string1, ERR_STRING_SZ);
74 
75 				fprintf(stderr, "socket(%d, %d, %d) expected "
76 					"success got err (%s)\n",
77 					s->domain, s->type, s->protocol,
78 					err_string1);
79 
80 				err = -1;
81 				break;
82 			}
83 		}
84 	}
85 
86 	return err;
87 }
88 
89 int main(void)
90 {
91 	int err = run_tests();
92 
93 	return err;
94 }
95