2 * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
3 * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
4 * Copyright (c) 2016-2019 The strace developers.
7 * SPDX-License-Identifier: LGPL-2.1-or-later
11 #include "netlink_route.h"
13 #include "print_fields.h"
16 #include <linux/rtnetlink.h>
17 #ifdef HAVE_LINUX_NEIGHBOUR_H
18 # include <linux/neighbour.h>
21 #include "xlat/neighbor_cache_entry_flags.h"
22 #include "xlat/neighbor_cache_entry_states.h"
23 #include "xlat/rtnl_neigh_attrs.h"
26 decode_neigh_addr(struct tcb *const tcp,
27 const kernel_ulong_t addr,
28 const unsigned int len,
29 const void *const opaque_data)
31 const struct ndmsg *const ndmsg = opaque_data;
33 decode_inet_addr(tcp, addr, len, ndmsg->ndm_family, NULL);
39 decode_nda_cacheinfo(struct tcb *const tcp,
40 const kernel_ulong_t addr,
41 const unsigned int len,
42 const void *const opaque_data)
44 struct nda_cacheinfo ci;
48 else if (!umove_or_printaddr(tcp, addr, &ci)) {
49 PRINT_FIELD_U("{", ci, ndm_confirmed);
50 PRINT_FIELD_U(", ", ci, ndm_used);
51 PRINT_FIELD_U(", ", ci, ndm_updated);
52 PRINT_FIELD_U(", ", ci, ndm_refcnt);
59 static const nla_decoder_t ndmsg_nla_decoders[] = {
60 [NDA_DST] = decode_neigh_addr,
61 [NDA_LLADDR] = decode_neigh_addr,
62 [NDA_CACHEINFO] = decode_nda_cacheinfo,
63 [NDA_PROBES] = decode_nla_u32,
64 [NDA_VLAN] = decode_nla_u16,
65 [NDA_PORT] = decode_nla_be16,
66 [NDA_VNI] = decode_nla_u32,
67 [NDA_IFINDEX] = decode_nla_ifindex,
68 [NDA_MASTER] = decode_nla_ifindex,
69 [NDA_LINK_NETNSID] = decode_nla_u32,
71 [NDA_PROTOCOL] = decode_nla_u8,
74 DECL_NETLINK_ROUTE_DECODER(decode_ndmsg)
76 struct ndmsg ndmsg = { .ndm_family = family };
77 size_t offset = sizeof(ndmsg.ndm_family);
78 bool decode_nla = false;
80 PRINT_FIELD_XVAL("{", ndmsg, ndm_family, addrfams, "AF_???");
83 if (len >= sizeof(ndmsg)) {
84 if (!umoven_or_printaddr(tcp, addr + offset,
85 sizeof(ndmsg) - offset,
86 (char *) &ndmsg + offset)) {
87 PRINT_FIELD_IFINDEX("", ndmsg, ndm_ifindex);
88 PRINT_FIELD_FLAGS(", ", ndmsg, ndm_state,
89 neighbor_cache_entry_states,
91 PRINT_FIELD_FLAGS(", ", ndmsg, ndm_flags,
92 neighbor_cache_entry_flags,
94 PRINT_FIELD_XVAL(", ", ndmsg, ndm_type,
95 routing_types, "RTN_???");
102 offset = NLMSG_ALIGN(sizeof(ndmsg));
103 if (decode_nla && len > offset) {
105 decode_nlattr(tcp, addr + offset, len - offset,
106 rtnl_neigh_attrs, "NDA_???",
108 ARRAY_SIZE(ndmsg_nla_decoders), &ndmsg);
112 DECL_NETLINK_ROUTE_DECODER(decode_rtm_getneigh)
114 if (family == AF_BRIDGE)
115 decode_ifinfomsg(tcp, nlmsghdr, family, addr, len);
117 decode_ndmsg(tcp, nlmsghdr, family, addr, len);