1 /*
2 * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
3 * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
4 * Copyright (c) 2016-2017 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_route.h"
33
34 #include <linux/rtnetlink.h>
35
36 #include "xlat/nl_route_types.h"
37
38 static void
decode_family(struct tcb * const tcp,const uint8_t family,const kernel_ulong_t addr,const unsigned int len)39 decode_family(struct tcb *const tcp, const uint8_t family,
40 const kernel_ulong_t addr, const unsigned int len)
41 {
42 tprints("{family=");
43 printxval(addrfams, family, "AF_???");
44 if (len > sizeof(family)) {
45 tprints(", ");
46 printstr_ex(tcp, addr + sizeof(family),
47 len - sizeof(family), QUOTE_FORCE_HEX);
48 }
49 tprints("}");
50 }
51
52 typedef DECL_NETLINK_ROUTE_DECODER((*netlink_route_decoder_t));
53
54 static const netlink_route_decoder_t route_decoders[] = {
55 [RTM_DELLINK - RTM_BASE] = decode_ifinfomsg,
56 [RTM_GETLINK - RTM_BASE] = decode_ifinfomsg,
57 [RTM_NEWLINK - RTM_BASE] = decode_ifinfomsg,
58 [RTM_SETLINK - RTM_BASE] = decode_ifinfomsg,
59
60 [RTM_DELADDR - RTM_BASE] = decode_ifaddrmsg,
61 [RTM_GETADDR - RTM_BASE] = decode_ifaddrmsg,
62 [RTM_GETANYCAST - RTM_BASE] = decode_ifaddrmsg,
63 [RTM_GETMULTICAST - RTM_BASE] = decode_ifaddrmsg,
64 [RTM_NEWADDR - RTM_BASE] = decode_ifaddrmsg,
65
66 [RTM_DELROUTE - RTM_BASE] = decode_rtmsg,
67 [RTM_GETROUTE - RTM_BASE] = decode_rtmsg,
68 [RTM_NEWROUTE - RTM_BASE] = decode_rtmsg,
69
70 [RTM_DELRULE - RTM_BASE] = decode_fib_rule_hdr,
71 [RTM_GETRULE - RTM_BASE] = decode_fib_rule_hdr,
72 [RTM_NEWRULE - RTM_BASE] = decode_fib_rule_hdr,
73
74 [RTM_DELNEIGH - RTM_BASE] = decode_ndmsg,
75 [RTM_GETNEIGH - RTM_BASE] = decode_rtm_getneigh,
76 [RTM_NEWNEIGH - RTM_BASE] = decode_ndmsg,
77
78 [RTM_GETNEIGHTBL - RTM_BASE] = decode_ndtmsg,
79 [RTM_NEWNEIGHTBL - RTM_BASE] = decode_ndtmsg,
80 [RTM_SETNEIGHTBL - RTM_BASE] = decode_ndtmsg,
81
82 [RTM_DELQDISC - RTM_BASE] = decode_tcmsg,
83 [RTM_GETQDISC - RTM_BASE] = decode_tcmsg,
84 [RTM_NEWQDISC - RTM_BASE] = decode_tcmsg,
85 [RTM_DELTCLASS - RTM_BASE] = decode_tcmsg,
86 [RTM_GETTCLASS - RTM_BASE] = decode_tcmsg,
87 [RTM_NEWTCLASS - RTM_BASE] = decode_tcmsg,
88 [RTM_DELTFILTER - RTM_BASE] = decode_tcmsg,
89 [RTM_GETTFILTER - RTM_BASE] = decode_tcmsg,
90 [RTM_NEWTFILTER - RTM_BASE] = decode_tcmsg,
91
92 [RTM_DELACTION - RTM_BASE] = decode_tcamsg,
93 [RTM_GETACTION - RTM_BASE] = decode_tcamsg,
94 [RTM_NEWACTION - RTM_BASE] = decode_tcamsg,
95
96 #ifdef HAVE_STRUCT_IFADDRLBLMSG
97 [RTM_DELADDRLABEL - RTM_BASE] = decode_ifaddrlblmsg,
98 [RTM_GETADDRLABEL - RTM_BASE] = decode_ifaddrlblmsg,
99 [RTM_NEWADDRLABEL - RTM_BASE] = decode_ifaddrlblmsg,
100 #endif
101
102 #ifdef HAVE_STRUCT_DCBMSG
103 [RTM_GETDCB - RTM_BASE] = decode_dcbmsg,
104 [RTM_SETDCB - RTM_BASE] = decode_dcbmsg,
105 #endif
106
107 #ifdef HAVE_STRUCT_NETCONFMSG
108 [RTM_DELNETCONF - RTM_BASE] = decode_netconfmsg,
109 [RTM_GETNETCONF - RTM_BASE] = decode_netconfmsg,
110 [RTM_NEWNETCONF - RTM_BASE] = decode_netconfmsg,
111 #endif
112
113 #ifdef HAVE_STRUCT_BR_PORT_MSG
114 [RTM_DELMDB - RTM_BASE] = decode_br_port_msg,
115 [RTM_GETMDB - RTM_BASE] = decode_br_port_msg,
116 [RTM_NEWMDB - RTM_BASE] = decode_br_port_msg,
117 #endif
118
119 [RTM_DELNSID - RTM_BASE] = decode_rtgenmsg,
120 [RTM_GETNSID - RTM_BASE] = decode_rtgenmsg,
121 [RTM_NEWNSID - RTM_BASE] = decode_rtgenmsg
122 };
123
124 bool
decode_netlink_route(struct tcb * const tcp,const struct nlmsghdr * const nlmsghdr,const kernel_ulong_t addr,const unsigned int len)125 decode_netlink_route(struct tcb *const tcp,
126 const struct nlmsghdr *const nlmsghdr,
127 const kernel_ulong_t addr,
128 const unsigned int len)
129 {
130 uint8_t family;
131
132 if (nlmsghdr->nlmsg_type == NLMSG_DONE)
133 return false;
134
135 if (!umove_or_printaddr(tcp, addr, &family)) {
136 const unsigned int index = nlmsghdr->nlmsg_type - RTM_BASE;
137
138 if (index < ARRAY_SIZE(route_decoders)
139 && route_decoders[index]) {
140 route_decoders[index](tcp, nlmsghdr, family, addr, len);
141 } else {
142 decode_family(tcp, family, addr, len);
143 }
144 }
145
146 return true;
147 }
148