2 * This file is part of net-yy-unix strace test.
4 * Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <sys/socket.h>
40 #include <linux/sock_diag.h>
41 #include <linux/unix_diag.h>
44 send_query(const int fd)
46 struct sockaddr_nl nladdr = {
47 .nl_family = AF_NETLINK
51 struct unix_diag_req udr;
54 .nlmsg_len = sizeof(req),
55 .nlmsg_type = SOCK_DIAG_BY_FAMILY,
56 .nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP
59 .sdiag_family = AF_UNIX,
61 .udiag_show = UDIAG_SHOW_NAME | UDIAG_SHOW_PEER
66 .iov_len = sizeof(req)
69 .msg_name = (void *) &nladdr,
70 .msg_namelen = sizeof(nladdr),
75 if (sendmsg(fd, &msg, 0) <= 0)
76 perror_msg_and_skip("sendmsg");
80 check_responses(const int fd)
84 long buf[8192 / sizeof(long)];
87 struct sockaddr_nl nladdr = {
88 .nl_family = AF_NETLINK
91 .iov_base = hdr_buf.buf,
92 .iov_len = sizeof(hdr_buf.buf)
95 .msg_name = (void *) &nladdr,
96 .msg_namelen = sizeof(nladdr),
101 ssize_t ret = recvmsg(fd, &msg, 0);
103 perror_msg_and_skip("recvmsg");
105 struct nlmsghdr *h = &hdr_buf.hdr;
106 if (!NLMSG_OK(h, ret))
107 error_msg_and_skip("!NLMSG_OK");
108 if (h->nlmsg_type == NLMSG_ERROR) {
109 const struct nlmsgerr *err = NLMSG_DATA(h);
110 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
111 error_msg_and_skip("NLMSG_ERROR");
113 perror_msg_and_skip("NLMSG_ERROR");
115 if (h->nlmsg_type != SOCK_DIAG_BY_FAMILY)
116 error_msg_and_skip("unexpected nlmsg_type %u",
117 (unsigned) h->nlmsg_type);
119 const struct unix_diag_msg *diag = NLMSG_DATA(h);
120 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*diag)))
121 error_msg_and_skip("short response");
124 #define SUN_PATH "netlink_unix_diag_socket"
127 struct sockaddr_un addr = {
128 .sun_family = AF_UNIX,
131 socklen_t len = offsetof(struct sockaddr_un, sun_path) + sizeof(SUN_PATH);
136 (void) unlink(SUN_PATH);
137 if (socket(AF_UNIX, SOCK_STREAM, 0))
138 perror_msg_and_skip("socket AF_UNIX");
139 if (bind(0, (struct sockaddr *) &addr, len))
140 perror_msg_and_skip("bind");
142 perror_msg_and_skip("listen");
144 assert(unlink(SUN_PATH) == 0);
146 if (socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG) != 1)
147 perror_msg_and_skip("socket AF_NETLINK");