1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*
* Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "netlink_route.h"
#include "nlattr.h"
#include "netlink.h"
#include <linux/rtnetlink.h>
#include <linux/if_addr.h>
#include "xlat/ifaddrflags.h"
#include "xlat/routing_scopes.h"
#include "xlat/rtnl_addr_attrs.h"
static bool
decode_ifa_address(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
const struct ifaddrmsg *const ifaddr = opaque_data;
decode_inet_addr(tcp, addr, len, ifaddr->ifa_family, NULL);
return true;
}
static bool
decode_ifa_cacheinfo(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct ifa_cacheinfo ci;
if (len < sizeof(ci))
return false;
else if (!umove_or_printaddr(tcp, addr, &ci)) {
tprint_struct_begin();
PRINT_FIELD_U(ci, ifa_prefered);
tprint_struct_next();
PRINT_FIELD_U(ci, ifa_valid);
tprint_struct_next();
PRINT_FIELD_U(ci, cstamp);
tprint_struct_next();
PRINT_FIELD_U(ci, tstamp);
tprint_struct_end();
}
return true;
}
static bool
decode_ifa_flags(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
uint32_t ifa_flags;
if (len < sizeof(ifa_flags))
return false;
else if (!umove_or_printaddr(tcp, addr, &ifa_flags))
printflags(ifaddrflags, ifa_flags, "IFA_F_???");
return true;
}
static const nla_decoder_t ifaddrmsg_nla_decoders[] = {
[IFA_ADDRESS] = decode_ifa_address,
[IFA_LOCAL] = decode_ifa_address,
[IFA_LABEL] = decode_nla_str,
[IFA_BROADCAST] = decode_ifa_address,
[IFA_ANYCAST] = decode_ifa_address,
[IFA_CACHEINFO] = decode_ifa_cacheinfo,
[IFA_MULTICAST] = decode_ifa_address,
[IFA_FLAGS] = decode_ifa_flags,
[IFA_RT_PRIORITY] = decode_nla_u32,
[IFA_TARGET_NETNSID] = decode_nla_s32,
};
DECL_NETLINK_ROUTE_DECODER(decode_ifaddrmsg)
{
struct ifaddrmsg ifaddr = { .ifa_family = family };
size_t offset = sizeof(ifaddr.ifa_family);
bool decode_nla = false;
tprint_struct_begin();
PRINT_FIELD_XVAL(ifaddr, ifa_family, addrfams, "AF_???");
tprint_struct_next();
if (len >= sizeof(ifaddr)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(ifaddr) - offset,
(char *) &ifaddr + offset)) {
PRINT_FIELD_U(ifaddr, ifa_prefixlen);
tprint_struct_next();
PRINT_FIELD_FLAGS(ifaddr, ifa_flags,
ifaddrflags, "IFA_F_???");
tprint_struct_next();
PRINT_FIELD_XVAL(ifaddr, ifa_scope,
routing_scopes, NULL);
tprint_struct_next();
PRINT_FIELD_IFINDEX(ifaddr, ifa_index);
decode_nla = true;
}
} else
tprint_more_data_follows();
tprint_struct_end();
offset = NLMSG_ALIGN(sizeof(ifaddr));
if (decode_nla && len > offset) {
tprint_array_next();
decode_nlattr(tcp, addr + offset, len - offset,
rtnl_addr_attrs, "IFA_???",
ifaddrmsg_nla_decoders,
ARRAY_SIZE(ifaddrmsg_nla_decoders), &ifaddr);
}
}
|
