granicus.if.org Git - strace/blob - rtnl_addrlabel.c

   1 /*
   2  * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
   3  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
   4  * Copyright (c) 2016-2018 The strace developers.
   5  * All rights reserved.
   6  *
   7  * SPDX-License-Identifier: LGPL-2.1-or-later
   8  */
   9
  10 #include "defs.h"
  11
  12 #ifdef HAVE_STRUCT_IFADDRLBLMSG
  13
  14 # include "netlink_route.h"
  15 # include "nlattr.h"
  16 # include "print_fields.h"
  17
  18 # include <linux/if_addrlabel.h>
  19 # include "netlink.h"
  20
  21 # include "xlat/rtnl_addrlabel_attrs.h"
  22
  23 static bool
  24 decode_ifal_address(struct tcb *const tcp,
  25                     const kernel_ulong_t addr,
  26                     const unsigned int len,
  27                     const void *const opaque_data)
  28 {
  29         const struct ifaddrlblmsg *const ifal = opaque_data;
  30
  31         decode_inet_addr(tcp, addr, len, ifal->ifal_family, NULL);
  32
  33         return true;
  34 }
  35
  36 static const nla_decoder_t ifaddrlblmsg_nla_decoders[] = {
  37         [IFAL_ADDRESS]  = decode_ifal_address,
  38         [IFAL_LABEL]    = decode_nla_u32
  39 };
  40
  41 DECL_NETLINK_ROUTE_DECODER(decode_ifaddrlblmsg)
  42 {
  43         struct ifaddrlblmsg ifal = { .ifal_family = family };
  44         size_t offset = sizeof(ifal.ifal_family);
  45         bool decode_nla = false;
  46
  47         PRINT_FIELD_XVAL("{", ifal, ifal_family, addrfams, "AF_???");
  48
  49         tprints(", ");
  50         if (len >= sizeof(ifal)) {
  51                 if (!umoven_or_printaddr(tcp, addr + offset,
  52                                          sizeof(ifal) - offset,
  53                                          (char *) &ifal + offset)) {
  54                         PRINT_FIELD_U("", ifal, ifal_prefixlen);
  55                         PRINT_FIELD_U(", ", ifal, ifal_flags);
  56                         PRINT_FIELD_IFINDEX(", ", ifal, ifal_index);
  57                         PRINT_FIELD_U(", ", ifal, ifal_seq);
  58                         decode_nla = true;
  59                 }
  60         } else
  61                 tprints("...");
  62         tprints("}");
  63
  64         offset = NLMSG_ALIGN(sizeof(ifal));
  65         if (decode_nla && len > offset) {
  66                 tprints(", ");
  67                 decode_nlattr(tcp, addr + offset, len - offset,
  68                               rtnl_addrlabel_attrs, "IFAL_???",
  69                               ifaddrlblmsg_nla_decoders,
  70                               ARRAY_SIZE(ifaddrlblmsg_nla_decoders), &ifal);
  71         }
  72 }
  73
  74 #endif