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139 lines
4.2 KiB
139 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_IF_ADDR_H |
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# include <linux/if_addr.h> |
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#endif |
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#include "xlat/ifaddrflags.h" |
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#include "xlat/routing_scopes.h" |
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#include "xlat/rtnl_addr_attrs.h" |
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static bool |
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decode_ifa_address(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 ifaddrmsg *const ifaddr = opaque_data; |
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decode_inet_addr(tcp, addr, len, ifaddr->ifa_family, NULL); |
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return true; |
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} |
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static bool |
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decode_ifa_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 ifa_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, ifa_prefered); |
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PRINT_FIELD_U(", ", ci, ifa_valid); |
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PRINT_FIELD_U(", ", ci, cstamp); |
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PRINT_FIELD_U(", ", ci, tstamp); |
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tprintf("}"); |
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} |
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return true; |
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} |
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static bool |
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decode_ifa_flags(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 ifa_flags; |
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if (len < sizeof(ifa_flags)) |
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return false; |
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else if (!umove_or_printaddr(tcp, addr, &ifa_flags)) |
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printflags(ifaddrflags, ifa_flags, "IFA_F_???"); |
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return true; |
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} |
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static const nla_decoder_t ifaddrmsg_nla_decoders[] = { |
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[IFA_ADDRESS] = decode_ifa_address, |
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[IFA_LOCAL] = decode_ifa_address, |
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[IFA_LABEL] = decode_nla_str, |
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[IFA_BROADCAST] = decode_ifa_address, |
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[IFA_ANYCAST] = decode_ifa_address, |
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[IFA_CACHEINFO] = decode_ifa_cacheinfo, |
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[IFA_MULTICAST] = decode_ifa_address, |
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[IFA_FLAGS] = decode_ifa_flags |
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}; |
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DECL_NETLINK_ROUTE_DECODER(decode_ifaddrmsg) |
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{ |
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struct ifaddrmsg ifaddr = { .ifa_family = family }; |
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size_t offset = sizeof(ifaddr.ifa_family); |
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bool decode_nla = false; |
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PRINT_FIELD_XVAL("{", ifaddr, ifa_family, addrfams, "AF_???"); |
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tprints(", "); |
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if (len >= sizeof(ifaddr)) { |
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if (!umoven_or_printaddr(tcp, addr + offset, |
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sizeof(ifaddr) - offset, |
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(char *) &ifaddr + offset)) { |
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PRINT_FIELD_U("", ifaddr, ifa_prefixlen); |
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PRINT_FIELD_FLAGS(", ", ifaddr, ifa_flags, |
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ifaddrflags, "IFA_F_???"); |
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PRINT_FIELD_XVAL(", ", ifaddr, ifa_scope, |
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routing_scopes, NULL); |
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PRINT_FIELD_IFINDEX(", ", ifaddr, ifa_index); |
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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(ifaddr)); |
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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_addr_attrs, "IFA_???", |
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ifaddrmsg_nla_decoders, |
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ARRAY_SIZE(ifaddrmsg_nla_decoders), &ifaddr); |
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} |
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}
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