138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
/*
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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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