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137 lines
4.2 KiB
137 lines
4.2 KiB
/* |
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* Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr> |
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* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com> |
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* Copyright (c) 2016-2018 The strace developers. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "defs.h" |
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#include "netlink_route.h" |
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#include "nlattr.h" |
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#include "print_fields.h" |
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#include "netlink.h" |
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#include <linux/rtnetlink.h> |
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#ifdef HAVE_LINUX_NEIGHBOUR_H |
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# include <linux/neighbour.h> |
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#endif |
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#include "xlat/neighbor_cache_entry_flags.h" |
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#include "xlat/neighbor_cache_entry_states.h" |
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#include "xlat/rtnl_neigh_attrs.h" |
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static bool |
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decode_neigh_addr(struct tcb *const tcp, |
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const kernel_ulong_t addr, |
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const unsigned int len, |
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const void *const opaque_data) |
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{ |
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const struct ndmsg *const ndmsg = opaque_data; |
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decode_inet_addr(tcp, addr, len, ndmsg->ndm_family, NULL); |
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return true; |
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} |
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static bool |
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decode_nda_cacheinfo(struct tcb *const tcp, |
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const kernel_ulong_t addr, |
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const unsigned int len, |
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const void *const opaque_data) |
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{ |
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struct nda_cacheinfo ci; |
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if (len < sizeof(ci)) |
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return false; |
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else if (!umove_or_printaddr(tcp, addr, &ci)) { |
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PRINT_FIELD_U("{", ci, ndm_confirmed); |
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PRINT_FIELD_U(", ", ci, ndm_used); |
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PRINT_FIELD_U(", ", ci, ndm_updated); |
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PRINT_FIELD_U(", ", ci, ndm_refcnt); |
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tprints("}"); |
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} |
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return true; |
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} |
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static const nla_decoder_t ndmsg_nla_decoders[] = { |
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[NDA_DST] = decode_neigh_addr, |
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[NDA_LLADDR] = decode_neigh_addr, |
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[NDA_CACHEINFO] = decode_nda_cacheinfo, |
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[NDA_PROBES] = decode_nla_u32, |
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[NDA_VLAN] = decode_nla_u16, |
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[NDA_PORT] = decode_nla_be16, |
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[NDA_VNI] = decode_nla_u32, |
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[NDA_IFINDEX] = decode_nla_ifindex, |
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[NDA_MASTER] = decode_nla_ifindex, |
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[NDA_LINK_NETNSID] = decode_nla_u32, |
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[NDA_SRC_VNI] = NULL, |
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}; |
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DECL_NETLINK_ROUTE_DECODER(decode_ndmsg) |
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{ |
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struct ndmsg ndmsg = { .ndm_family = family }; |
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size_t offset = sizeof(ndmsg.ndm_family); |
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bool decode_nla = false; |
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PRINT_FIELD_XVAL("{", ndmsg, ndm_family, addrfams, "AF_???"); |
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tprints(", "); |
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if (len >= sizeof(ndmsg)) { |
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if (!umoven_or_printaddr(tcp, addr + offset, |
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sizeof(ndmsg) - offset, |
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(char *) &ndmsg + offset)) { |
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PRINT_FIELD_IFINDEX("", ndmsg, ndm_ifindex); |
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PRINT_FIELD_FLAGS(", ", ndmsg, ndm_state, |
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neighbor_cache_entry_states, |
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"NUD_???"); |
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PRINT_FIELD_FLAGS(", ", ndmsg, ndm_flags, |
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neighbor_cache_entry_flags, |
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"NTF_???"); |
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PRINT_FIELD_XVAL(", ", ndmsg, ndm_type, |
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routing_types, "RTN_???"); |
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decode_nla = true; |
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} |
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} else |
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tprints("..."); |
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tprints("}"); |
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offset = NLMSG_ALIGN(sizeof(ndmsg)); |
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if (decode_nla && len > offset) { |
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tprints(", "); |
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decode_nlattr(tcp, addr + offset, len - offset, |
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rtnl_neigh_attrs, "NDA_???", |
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ndmsg_nla_decoders, |
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ARRAY_SIZE(ndmsg_nla_decoders), &ndmsg); |
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} |
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} |
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DECL_NETLINK_ROUTE_DECODER(decode_rtm_getneigh) |
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{ |
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if (family == AF_BRIDGE) |
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decode_ifinfomsg(tcp, nlmsghdr, family, addr, len); |
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else |
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decode_ndmsg(tcp, nlmsghdr, family, addr, len); |
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}
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