1 /*
2 * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
3 * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
4 * Copyright (c) 2016-2018 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
32 #ifdef HAVE_STRUCT_IFADDRLBLMSG
33
34 # include "netlink_route.h"
35 # include "nlattr.h"
36 # include "print_fields.h"
37
38 # include <linux/if_addrlabel.h>
39 # include "netlink.h"
40
41 # include "xlat/rtnl_addrlabel_attrs.h"
42
43 static bool
decode_ifal_address(struct tcb * const tcp,const kernel_ulong_t addr,const unsigned int len,const void * const opaque_data)44 decode_ifal_address(struct tcb *const tcp,
45 const kernel_ulong_t addr,
46 const unsigned int len,
47 const void *const opaque_data)
48 {
49 const struct ifaddrlblmsg *const ifal = opaque_data;
50
51 decode_inet_addr(tcp, addr, len, ifal->ifal_family, NULL);
52
53 return true;
54 }
55
56 static const nla_decoder_t ifaddrlblmsg_nla_decoders[] = {
57 [IFAL_ADDRESS] = decode_ifal_address,
58 [IFAL_LABEL] = decode_nla_u32
59 };
60
DECL_NETLINK_ROUTE_DECODER(decode_ifaddrlblmsg)61 DECL_NETLINK_ROUTE_DECODER(decode_ifaddrlblmsg)
62 {
63 struct ifaddrlblmsg ifal = { .ifal_family = family };
64 size_t offset = sizeof(ifal.ifal_family);
65 bool decode_nla = false;
66
67 PRINT_FIELD_XVAL("{", ifal, ifal_family, addrfams, "AF_???");
68
69 tprints(", ");
70 if (len >= sizeof(ifal)) {
71 if (!umoven_or_printaddr(tcp, addr + offset,
72 sizeof(ifal) - offset,
73 (char *) &ifal + offset)) {
74 PRINT_FIELD_U("", ifal, ifal_prefixlen);
75 PRINT_FIELD_U(", ", ifal, ifal_flags);
76 PRINT_FIELD_IFINDEX(", ", ifal, ifal_index);
77 PRINT_FIELD_U(", ", ifal, ifal_seq);
78 decode_nla = true;
79 }
80 } else
81 tprints("...");
82 tprints("}");
83
84 offset = NLMSG_ALIGN(sizeof(ifal));
85 if (decode_nla && len > offset) {
86 tprints(", ");
87 decode_nlattr(tcp, addr + offset, len - offset,
88 rtnl_addrlabel_attrs, "IFAL_???",
89 ifaddrlblmsg_nla_decoders,
90 ARRAY_SIZE(ifaddrlblmsg_nla_decoders), &ifal);
91 }
92 }
93
94 #endif
95