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1 /*
2  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
3  * Copyright (c) 2017-2018 The strace developers.
4  * All rights reserved.
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  * 3. The name of the author may not be used to endorse or promote products
15  *    derived from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include "tests.h"
30 
31 #include <stdio.h>
32 #include <string.h>
33 #include <stdint.h>
34 #include <sys/sysmacros.h>
35 #include <netinet/tcp.h>
36 #include "test_nlattr.h"
37 #include <linux/sock_diag.h>
38 #include <linux/unix_diag.h>
39 
40 static void
init_unix_diag_msg(struct nlmsghdr * const nlh,const unsigned int msg_len)41 init_unix_diag_msg(struct nlmsghdr *const nlh, const unsigned int msg_len)
42 {
43 	SET_STRUCT(struct nlmsghdr, nlh,
44 		.nlmsg_len = msg_len,
45 		.nlmsg_type = SOCK_DIAG_BY_FAMILY,
46 		.nlmsg_flags = NLM_F_DUMP
47 	);
48 
49 	struct unix_diag_msg *const msg = NLMSG_DATA(nlh);
50 	SET_STRUCT(struct unix_diag_msg, msg,
51 		.udiag_family = AF_UNIX,
52 		.udiag_type = SOCK_STREAM,
53 		.udiag_state = TCP_ESTABLISHED
54 	);
55 }
56 
57 static void
print_unix_diag_msg(const unsigned int msg_len)58 print_unix_diag_msg(const unsigned int msg_len)
59 {
60 	printf("{len=%u, type=SOCK_DIAG_BY_FAMILY"
61 	       ", flags=NLM_F_DUMP, seq=0, pid=0}, {udiag_family=AF_UNIX"
62 	       ", udiag_type=SOCK_STREAM, udiag_state=TCP_ESTABLISHED"
63 	       ", udiag_ino=0, udiag_cookie=[0, 0]}",
64 	       msg_len);
65 }
66 
67 static void
print_uint(const unsigned int * p,size_t i)68 print_uint(const unsigned int *p, size_t i)
69 {
70 	printf("%u", *p);
71 }
72 
73 int
main(void)74 main(void)
75 {
76 	skip_if_unavailable("/proc/self/fd/");
77 
78 	static const struct unix_diag_vfs uv = {
79 		.udiag_vfs_dev = 0xabcddafa,
80 		.udiag_vfs_ino = 0xbafabcda
81 	};
82 	static const struct unix_diag_rqlen rql = {
83 		.udiag_rqueue = 0xfabdcdad,
84 		.udiag_wqueue = 0xbacdadcf
85 	};
86 	static const uint32_t inode[] = { 0xadbcadbc, 0xfabdcdac };
87 
88 	const int fd = create_nl_socket(NETLINK_SOCK_DIAG);
89 	const unsigned int hdrlen = sizeof(struct unix_diag_msg);
90 	void *const nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
91 					 NLA_HDRLEN + sizeof(inode));
92 
93 	static char pattern[4096];
94 	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
95 
96 	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
97 			   init_unix_diag_msg, print_unix_diag_msg,
98 			   UNIX_DIAG_VFS, pattern, uv,
99 			   printf("{udiag_vfs_dev=makedev(%u, %u)",
100 				  major(uv.udiag_vfs_dev),
101 				  minor(uv.udiag_vfs_dev));
102 			   PRINT_FIELD_U(", ", uv, udiag_vfs_ino);
103 			   printf("}"));
104 
105 	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
106 			   init_unix_diag_msg, print_unix_diag_msg,
107 			   UNIX_DIAG_RQLEN, pattern, rql,
108 			   PRINT_FIELD_U("{", rql, udiag_rqueue);
109 			   PRINT_FIELD_U(", ", rql, udiag_wqueue);
110 			   printf("}"));
111 
112 	TEST_NLATTR_ARRAY(fd, nlh0, hdrlen,
113 			  init_unix_diag_msg, print_unix_diag_msg,
114 			  UNIX_DIAG_ICONS, pattern, inode, print_uint);
115 
116 	puts("+++ exited with 0 +++");
117 	return 0;
118 }
119