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

   1 /*
   2  * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
   3  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
   4  * Copyright (c) 2016-2017 The strace developers.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "defs.h"
  31 #include "netlink_route.h"
  32 #include "nlattr.h"
  33 #include "print_fields.h"
  34
  35 #include <linux/ip.h>
  36 #include "netlink.h"
  37 #include <linux/rtnetlink.h>
  38
  39 #include "xlat/ip_type_of_services.h"
  40 #include "xlat/routing_flags.h"
  41 #include "xlat/routing_protocols.h"
  42 #include "xlat/routing_table_ids.h"
  43 #include "xlat/routing_types.h"
  44 #include "xlat/rtnl_route_attrs.h"
  45
  46 DECL_NETLINK_ROUTE_DECODER(decode_rtmsg)
  47 {
  48         struct rtmsg rtmsg = { .rtm_family = family };
  49         size_t offset = sizeof(rtmsg.rtm_family);
  50         bool decode_nla = false;
  51
  52         PRINT_FIELD_XVAL("{", rtmsg, rtm_family, addrfams, "AF_???");
  53
  54         tprints(", ");
  55         if (len >= sizeof(rtmsg)) {
  56                 if (!umoven_or_printaddr(tcp, addr + offset,
  57                                          sizeof(rtmsg) - offset,
  58                                          (void *) &rtmsg + offset)) {
  59                         PRINT_FIELD_U("", rtmsg, rtm_dst_len);
  60                         PRINT_FIELD_U(", ", rtmsg, rtm_src_len);
  61                         PRINT_FIELD_FLAGS(", ", rtmsg, rtm_tos,
  62                                           ip_type_of_services, "IPTOS_TOS_???");
  63                         PRINT_FIELD_XVAL(", ", rtmsg, rtm_table,
  64                                          routing_table_ids, NULL);
  65                         PRINT_FIELD_XVAL(", ", rtmsg, rtm_protocol,
  66                                          routing_protocols, "RTPROT_???");
  67                         PRINT_FIELD_XVAL(", ", rtmsg, rtm_scope,
  68                                          routing_scopes, NULL);
  69                         PRINT_FIELD_XVAL(", ", rtmsg, rtm_type,
  70                                          routing_types, "RTN_???");
  71                         PRINT_FIELD_FLAGS(", ", rtmsg, rtm_flags,
  72                                           routing_flags, "RTM_F_???");
  73                         decode_nla = true;
  74                 }
  75         } else
  76                 tprints("...");
  77         tprints("}");
  78
  79         offset = NLMSG_ALIGN(sizeof(rtmsg));
  80         if (decode_nla && len > offset) {
  81                 tprints(", ");
  82                 decode_nlattr(tcp, addr + offset, len - offset,
  83                               rtnl_route_attrs, "RTA_???", NULL, 0, NULL);
  84         }
  85 }