Branch data Line data Source code
1 : : /*
2 : : * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
3 : : * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
4 : : * Copyright (c) 2017 The strace developers.
5 : : * All rights reserved.
6 : : *
7 : : * Redistribution and use in source and binary forms, with or without
8 : : * modification, are permitted provided that the following conditions
9 : : * are met:
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.
17 : : *
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.
28 : : */
29 : :
30 : : #include "defs.h"
31 : : #include "netlink.h"
32 : : #include "netlink_sock_diag.h"
33 : :
34 : : static void
35 : 36 : decode_family(struct tcb *const tcp, const uint8_t family,
36 : : const kernel_ulong_t addr, const unsigned int len)
37 : : {
38 : 36 : tprints("{family=");
39 : 36 : printxval(addrfams, family, "AF_???");
40 [ + + ]: 36 : if (len > sizeof(family)) {
41 : 8 : tprints(", ");
42 : 8 : printstr_ex(tcp, addr + sizeof(family),
43 : : len - sizeof(family), QUOTE_FORCE_HEX);
44 : : }
45 : 36 : tprints("}");
46 : 36 : }
47 : :
48 : : typedef DECL_NETLINK_DIAG_DECODER((*netlink_diag_decoder_t));
49 : :
50 : : static const struct {
51 : : const netlink_diag_decoder_t request, response;
52 : : } diag_decoders[] = {
53 : : [AF_INET] = { decode_inet_diag_req, decode_inet_diag_msg },
54 : : [AF_INET6] = { decode_inet_diag_req, decode_inet_diag_msg },
55 : : [AF_NETLINK] = { decode_netlink_diag_req, decode_netlink_diag_msg },
56 : : [AF_PACKET] = { decode_packet_diag_req, decode_packet_diag_msg },
57 : : #ifdef AF_SMC
58 : : [AF_SMC] = { decode_smc_diag_req, decode_smc_diag_msg },
59 : : #endif
60 : : [AF_UNIX] = { decode_unix_diag_req, decode_unix_diag_msg }
61 : : };
62 : :
63 : : bool
64 : 298 : decode_netlink_sock_diag(struct tcb *const tcp,
65 : : const struct nlmsghdr *const nlmsghdr,
66 : : const kernel_ulong_t addr,
67 : : const unsigned int len)
68 : : {
69 : : uint8_t family;
70 : :
71 [ + + ]: 298 : if (nlmsghdr->nlmsg_type == NLMSG_DONE)
72 : : return false;
73 : :
74 [ + + ]: 292 : if (!umove_or_printaddr(tcp, addr, &family)) {
75 [ + + ]: 288 : if (family < ARRAY_SIZE(diag_decoders)
76 [ + + ]: 280 : && len > sizeof(family)) {
77 : 256 : const netlink_diag_decoder_t decoder =
78 : 256 : (nlmsghdr->nlmsg_flags & NLM_F_REQUEST)
79 : 88 : ? diag_decoders[family].request
80 [ + + ]: 256 : : diag_decoders[family].response;
81 : :
82 [ + + ]: 256 : if (decoder) {
83 : 252 : decoder(tcp, nlmsghdr, family, addr, len);
84 : 252 : return true;
85 : : }
86 : : }
87 : :
88 : 36 : decode_family(tcp, family, addr, len);
89 : : }
90 : :
91 : : return true;
92 : : }
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