2 * This file is part of net-yy-netlink strace test.
4 * Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <netinet/in.h>
37 #include <linux/sock_diag.h>
38 #include <linux/netlink_diag.h>
41 send_query(const int fd)
43 struct sockaddr_nl nladdr = {
44 .nl_family = AF_NETLINK
48 struct netlink_diag_req ndr;
51 .nlmsg_len = sizeof(req),
52 .nlmsg_type = SOCK_DIAG_BY_FAMILY,
53 .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
56 .sdiag_family = AF_NETLINK,
57 .sdiag_protocol = NDIAG_PROTO_ALL,
58 .ndiag_show = NDIAG_SHOW_MEMINFO
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)
81 long buf[8192 / sizeof(long)];
84 struct sockaddr_nl nladdr = {
85 .nl_family = AF_NETLINK
88 .iov_base = hdr_buf.buf,
89 .iov_len = sizeof(hdr_buf.buf)
92 .msg_name = (void *) &nladdr,
93 .msg_namelen = sizeof(nladdr),
98 ssize_t ret = recvmsg(fd, &msg, 0);
100 perror_msg_and_skip("recvmsg");
102 struct nlmsghdr *h = &hdr_buf.hdr;
103 if (!NLMSG_OK(h, ret))
104 error_msg_and_skip("!NLMSG_OK");
105 if (h->nlmsg_type == NLMSG_ERROR) {
106 const struct nlmsgerr *err = NLMSG_DATA(h);
107 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
108 error_msg_and_skip("NLMSG_ERROR");
110 perror_msg_and_skip("NLMSG_ERROR");
112 if (h->nlmsg_type != SOCK_DIAG_BY_FAMILY)
113 error_msg_and_skip("unexpected nlmsg_type %u",
114 (unsigned) h->nlmsg_type);
116 const struct netlink_diag_msg *diag = NLMSG_DATA(h);
117 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(*diag)))
118 error_msg_and_skip("short response");
123 struct sockaddr_nl addr;
124 socklen_t len = sizeof(addr);
126 memset(&addr, 0, sizeof(addr));
127 addr.nl_family = AF_NETLINK;
132 if (socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG))
133 perror_msg_and_skip("socket AF_NETLINK");
134 if (bind(0, (struct sockaddr *) &addr, len))
135 perror_msg_and_skip("bind");
137 if (socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG) != 1)
138 perror_msg_and_skip("socket AF_NETLINK");