1 /*
2 * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
3 * Copyright (c) 2017 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 "test_nlattr.h"
33 #include <linux/if.h>
34 #include <linux/if_arp.h>
35 #ifdef HAVE_LINUX_IF_LINK_H
36 # include <linux/if_link.h>
37 #endif
38 #include <linux/rtnetlink.h>
39
40 #ifndef IFLA_XDP
41 # define IFLA_XDP 43
42 #endif
43 #ifndef IFLA_XDP_FD
44 # define IFLA_XDP_FD 1
45 #endif
46
47 const unsigned int hdrlen = sizeof(struct ifinfomsg);
48
49 static void
init_ifinfomsg(struct nlmsghdr * const nlh,const unsigned int msg_len)50 init_ifinfomsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
51 {
52 SET_STRUCT(struct nlmsghdr, nlh,
53 .nlmsg_len = msg_len,
54 .nlmsg_type = RTM_GETLINK,
55 .nlmsg_flags = NLM_F_DUMP
56 );
57
58 struct ifinfomsg *const msg = NLMSG_DATA(nlh);
59 SET_STRUCT(struct ifinfomsg, msg,
60 .ifi_family = AF_UNIX,
61 .ifi_type = ARPHRD_LOOPBACK,
62 .ifi_index = ifindex_lo(),
63 .ifi_flags = IFF_UP,
64 );
65
66 struct nlattr *const nla = NLMSG_ATTR(nlh, sizeof(*msg));
67 SET_STRUCT(struct nlattr, nla,
68 .nla_len = msg_len - NLMSG_SPACE(hdrlen),
69 .nla_type = IFLA_XDP
70 );
71 }
72
73 static void
print_ifinfomsg(const unsigned int msg_len)74 print_ifinfomsg(const unsigned int msg_len)
75 {
76 printf("{len=%u, type=RTM_GETLINK, flags=NLM_F_DUMP"
77 ", seq=0, pid=0}, {ifi_family=AF_UNIX"
78 ", ifi_type=ARPHRD_LOOPBACK"
79 ", ifi_index=" IFINDEX_LO_STR
80 ", ifi_flags=IFF_UP, ifi_change=0}"
81 ", {{nla_len=%u, nla_type=IFLA_XDP}",
82 msg_len, msg_len - NLMSG_SPACE(hdrlen));
83 }
84
85 int
main(void)86 main(void)
87 {
88 skip_if_unavailable("/proc/self/fd/");
89
90 const int fd = create_nl_socket(NETLINK_ROUTE);
91 void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen));
92
93 static char pattern[4096];
94 fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
95
96 const int32_t num = 0xabacdbcd;
97 TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
98 init_ifinfomsg, print_ifinfomsg,
99 IFLA_XDP_FD, pattern, num,
100 printf("%d", num));
101
102 #ifdef XDP_FLAGS_UPDATE_IF_NOEXIST
103 const uint32_t flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
104 TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
105 init_ifinfomsg, print_ifinfomsg,
106 IFLA_XDP_FLAGS, pattern, flags,
107 printf("XDP_FLAGS_UPDATE_IF_NOEXIST"));
108 #endif
109
110 puts("+++ exited with 0 +++");
111 return 0;
112 }
113