2 * This file is part of inet-yy 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.
35 #include <netinet/in.h>
36 #include <linux/netlink.h>
37 #include <linux/sock_diag.h>
38 #include <linux/inet_diag.h>
41 send_query(const int fd, const int family, const int proto)
43 struct sockaddr_nl nladdr = {
44 .nl_family = AF_NETLINK
48 struct inet_diag_req_v2 idr;
51 .nlmsg_len = sizeof(req),
52 .nlmsg_type = SOCK_DIAG_BY_FAMILY,
53 .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
56 .sdiag_family = family,
57 .sdiag_protocol = proto,
63 .iov_len = sizeof(req)
66 .msg_name = (void *) &nladdr,
67 .msg_namelen = sizeof(nladdr),
72 if (sendmsg(fd, &msg, 0) <= 0)
73 perror_msg_and_skip("sendmsg");
77 check_responses(const int fd)
79 static char buf[8192];
80 struct sockaddr_nl nladdr = {
81 .nl_family = AF_NETLINK
85 .iov_len = sizeof(buf)
88 .msg_name = (void *) &nladdr,
89 .msg_namelen = sizeof(nladdr),
94 ssize_t ret = recvmsg(fd, &msg, 0);
96 perror_msg_and_skip("recvmsg");
98 struct nlmsghdr *h = (struct nlmsghdr *) buf;
99 if (!NLMSG_OK(h, ret))
100 error_msg_and_skip("!NLMSG_OK");
101 if (h->nlmsg_type == NLMSG_ERROR) {
102 const struct nlmsgerr *err = NLMSG_DATA(h);
103 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
104 error_msg_and_skip("NLMSG_ERROR");
106 perror_msg_and_skip("NLMSG_ERROR");
108 if (h->nlmsg_type != SOCK_DIAG_BY_FAMILY)
109 error_msg_and_skip("unexpected nlmsg_type %u",
110 (unsigned) h->nlmsg_type);
112 const struct inet_diag_msg *diag = NLMSG_DATA(h);
113 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*diag)))
114 error_msg_and_skip("short response");
119 struct sockaddr_in addr;
120 socklen_t len = sizeof(addr);
122 memset(&addr, 0, sizeof(addr));
123 addr.sin_family = AF_INET;
124 addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
129 if (socket(PF_INET, SOCK_STREAM, 0))
130 perror_msg_and_skip("socket PF_INET");
131 if (bind(0, (struct sockaddr *) &addr, len))
132 perror_msg_and_skip("bind");
134 perror_msg_and_skip("listen");
135 if (socket(AF_NETLINK, SOCK_RAW, NETLINK_INET_DIAG) != 1)
136 perror_msg_and_skip("socket AF_NETLINK");
138 send_query(1, AF_INET, IPPROTO_TCP);