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237 lines
6.7 KiB
237 lines
6.7 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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#ifdef HAVE_STRUCT_BR_PORT_MSG
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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 <netinet/in.h>
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# include <linux/if_bridge.h>
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# include "netlink.h"
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# ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
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# include "xlat/mdb_flags.h"
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# endif
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# include "xlat/mdb_states.h"
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# include "xlat/multicast_router_types.h"
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# include "xlat/rtnl_mdb_attrs.h"
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# include "xlat/rtnl_mdba_mdb_attrs.h"
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# include "xlat/rtnl_mdba_mdb_eattr_attrs.h"
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# include "xlat/rtnl_mdba_mdb_entry_attrs.h"
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# include "xlat/rtnl_mdba_router_attrs.h"
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# include "xlat/rtnl_mdba_router_pattr_attrs.h"
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static const nla_decoder_t mdba_mdb_eattr_nla_decoders[] = {
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[MDBA_MDB_EATTR_TIMER] = decode_nla_u32
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};
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static bool
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decode_mdba_mdb_entry_info(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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# ifdef HAVE_STRUCT_BR_MDB_ENTRY
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struct br_mdb_entry entry;
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if (len < sizeof(entry))
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return false;
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else if (!umove_or_printaddr(tcp, addr, &entry)) {
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PRINT_FIELD_IFINDEX("{", entry, ifindex);
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PRINT_FIELD_XVAL(", ", entry, state, mdb_states, "MDB_???");
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# ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
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PRINT_FIELD_FLAGS(", ", entry, flags,
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mdb_flags, "MDB_FLAGS_???");
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# endif
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# ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID
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PRINT_FIELD_U(", ", entry, vid);
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# endif
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const int proto = ntohs(entry.addr.proto);
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tprints(", addr={");
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print_inet_addr(proto, &entry.addr.u,
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sizeof(entry.addr.u), "u");
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tprints(", proto=htons(");
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printxval(addrfams, proto, "AF_???");
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tprints(")}}");
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}
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const size_t offset = NLMSG_ALIGN(sizeof(entry));
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if (len > offset) {
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tprints(", ");
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decode_nlattr(tcp, addr + offset, len - offset,
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rtnl_mdba_mdb_eattr_attrs, "MDBA_MDB_EATTR_???",
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mdba_mdb_eattr_nla_decoders,
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ARRAY_SIZE(mdba_mdb_eattr_nla_decoders), NULL);
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}
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return true;
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# else
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return false;
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# endif /* HAVE_STRUCT_BR_MDB_ENTRY */
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}
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static const nla_decoder_t mdba_mdb_entry_nla_decoders[] = {
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[MDBA_MDB_ENTRY_INFO] = decode_mdba_mdb_entry_info
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};
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static bool
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decode_mdba_mdb_entry(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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decode_nlattr(tcp, addr, len, rtnl_mdba_mdb_entry_attrs,
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"MDBA_MDB_ENTRY_???", mdba_mdb_entry_nla_decoders,
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ARRAY_SIZE(mdba_mdb_entry_nla_decoders), NULL);
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return true;
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}
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static const nla_decoder_t mdba_mdb_nla_decoders[] = {
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[MDBA_MDB_ENTRY] = decode_mdba_mdb_entry
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};
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static bool
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decode_mdba_mdb(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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decode_nlattr(tcp, addr, len, rtnl_mdba_mdb_attrs, "MDBA_MDB_???",
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mdba_mdb_nla_decoders,
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ARRAY_SIZE(mdba_mdb_nla_decoders), NULL);
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return true;
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}
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static bool
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decode_multicast_router_type(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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uint8_t type;
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if (!umove_or_printaddr(tcp, addr, &type))
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printxval(multicast_router_types, type, "MDB_RTR_TYPE_???");
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return true;
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}
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static const nla_decoder_t mdba_router_pattr_nla_decoders[] = {
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[MDBA_ROUTER_PATTR_TIMER] = decode_nla_u32,
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[MDBA_ROUTER_PATTR_TYPE] = decode_multicast_router_type
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};
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static bool
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decode_mdba_router_port(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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uint32_t ifindex;
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if (len < sizeof(ifindex))
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return false;
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else if (!umove_or_printaddr(tcp, addr, &ifindex))
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print_ifindex(ifindex);
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const size_t offset = NLMSG_ALIGN(sizeof(ifindex));
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if (len > offset) {
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tprints(", ");
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decode_nlattr(tcp, addr + offset, len - offset,
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rtnl_mdba_router_pattr_attrs,
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"MDBA_ROUTER_PATTR_???",
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mdba_router_pattr_nla_decoders,
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ARRAY_SIZE(mdba_router_pattr_nla_decoders), NULL);
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}
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return true;
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}
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static const nla_decoder_t mdba_router_nla_decoders[] = {
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[MDBA_ROUTER_PORT] = decode_mdba_router_port
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};
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static bool
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decode_mdba_router(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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decode_nlattr(tcp, addr, len, rtnl_mdba_router_attrs, "MDBA_ROUTER_???",
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mdba_router_nla_decoders,
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ARRAY_SIZE(mdba_router_nla_decoders), NULL);
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return true;
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}
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static const nla_decoder_t br_port_msg_nla_decoders[] = {
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[MDBA_MDB] = decode_mdba_mdb,
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[MDBA_ROUTER] = decode_mdba_router
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};
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DECL_NETLINK_ROUTE_DECODER(decode_br_port_msg)
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{
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struct br_port_msg bpm = { .family = family };
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size_t offset = sizeof(bpm.family);
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bool decode_nla = false;
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PRINT_FIELD_XVAL("{", bpm, family, addrfams, "AF_???");
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tprints(", ");
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if (len >= sizeof(bpm)) {
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if (!umoven_or_printaddr(tcp, addr + offset,
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sizeof(bpm) - offset,
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(char *) &bpm + offset)) {
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PRINT_FIELD_IFINDEX("", bpm, ifindex);
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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(bpm));
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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_mdb_attrs, "MDBA_???",
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br_port_msg_nla_decoders,
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ARRAY_SIZE(br_port_msg_nla_decoders), NULL);
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}
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}
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#endif
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