granicus.if.org Git - strace/blob - netlink_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) 2016-2018 The strace developers.
   5  * All rights reserved.
   6  *
   7  * SPDX-License-Identifier: LGPL-2.1-or-later
   8  */
   9
  10 #include "defs.h"
  11 #include "netlink.h"
  12 #include "netlink_route.h"
  13
  14 #include <linux/rtnetlink.h>
  15
  16 #include "xlat/nl_route_types.h"
  17
  18 static void
  19 decode_family(struct tcb *const tcp, const uint8_t family,
  20               const kernel_ulong_t addr, const unsigned int len)
  21 {
  22         tprints("{family=");
  23         printxval(addrfams, family, "AF_???");
  24         if (len > sizeof(family)) {
  25                 tprints(", ");
  26                 printstr_ex(tcp, addr + sizeof(family),
  27                             len - sizeof(family), QUOTE_FORCE_HEX);
  28         }
  29         tprints("}");
  30 }
  31
  32 typedef DECL_NETLINK_ROUTE_DECODER((*netlink_route_decoder_t));
  33
  34 static const netlink_route_decoder_t route_decoders[] = {
  35         [RTM_DELLINK - RTM_BASE] = decode_ifinfomsg,
  36         [RTM_GETLINK - RTM_BASE] = decode_ifinfomsg,
  37         [RTM_NEWLINK - RTM_BASE] = decode_ifinfomsg,
  38         [RTM_SETLINK - RTM_BASE] = decode_ifinfomsg,
  39
  40         [RTM_DELADDR - RTM_BASE] = decode_ifaddrmsg,
  41         [RTM_GETADDR - RTM_BASE] = decode_ifaddrmsg,
  42         [RTM_GETANYCAST - RTM_BASE] = decode_ifaddrmsg,
  43         [RTM_GETMULTICAST - RTM_BASE] = decode_ifaddrmsg,
  44         [RTM_NEWADDR - RTM_BASE] = decode_ifaddrmsg,
  45
  46         [RTM_DELROUTE - RTM_BASE] = decode_rtmsg,
  47         [RTM_GETROUTE - RTM_BASE] = decode_rtmsg,
  48         [RTM_NEWROUTE - RTM_BASE] = decode_rtmsg,
  49
  50         [RTM_DELRULE - RTM_BASE] = decode_fib_rule_hdr,
  51         [RTM_GETRULE - RTM_BASE] = decode_fib_rule_hdr,
  52         [RTM_NEWRULE - RTM_BASE] = decode_fib_rule_hdr,
  53
  54         [RTM_DELNEIGH - RTM_BASE] = decode_ndmsg,
  55         [RTM_GETNEIGH - RTM_BASE] = decode_rtm_getneigh,
  56         [RTM_NEWNEIGH - RTM_BASE] = decode_ndmsg,
  57
  58         [RTM_GETNEIGHTBL - RTM_BASE] = decode_ndtmsg,
  59         [RTM_NEWNEIGHTBL - RTM_BASE] = decode_ndtmsg,
  60         [RTM_SETNEIGHTBL - RTM_BASE] = decode_ndtmsg,
  61
  62         [RTM_DELQDISC - RTM_BASE] = decode_tcmsg,
  63         [RTM_GETQDISC - RTM_BASE] = decode_tcmsg,
  64         [RTM_NEWQDISC - RTM_BASE] = decode_tcmsg,
  65         [RTM_DELTCLASS - RTM_BASE] = decode_tcmsg,
  66         [RTM_GETTCLASS - RTM_BASE] = decode_tcmsg,
  67         [RTM_NEWTCLASS - RTM_BASE] = decode_tcmsg,
  68         [RTM_DELTFILTER - RTM_BASE] = decode_tcmsg,
  69         [RTM_GETTFILTER - RTM_BASE] = decode_tcmsg,
  70         [RTM_NEWTFILTER - RTM_BASE] = decode_tcmsg,
  71
  72         [RTM_DELACTION - RTM_BASE] = decode_tcamsg,
  73         [RTM_GETACTION - RTM_BASE] = decode_tcamsg,
  74         [RTM_NEWACTION - RTM_BASE] = decode_tcamsg,
  75
  76 #ifdef HAVE_STRUCT_IFADDRLBLMSG
  77         [RTM_DELADDRLABEL - RTM_BASE] = decode_ifaddrlblmsg,
  78         [RTM_GETADDRLABEL - RTM_BASE] = decode_ifaddrlblmsg,
  79         [RTM_NEWADDRLABEL - RTM_BASE] = decode_ifaddrlblmsg,
  80 #endif
  81
  82 #ifdef HAVE_STRUCT_DCBMSG
  83         [RTM_GETDCB - RTM_BASE] = decode_dcbmsg,
  84         [RTM_SETDCB - RTM_BASE] = decode_dcbmsg,
  85 #endif
  86
  87 #ifdef HAVE_STRUCT_NETCONFMSG
  88         [RTM_DELNETCONF - RTM_BASE] = decode_netconfmsg,
  89         [RTM_GETNETCONF - RTM_BASE] = decode_netconfmsg,
  90         [RTM_NEWNETCONF - RTM_BASE] = decode_netconfmsg,
  91 #endif
  92
  93 #ifdef HAVE_STRUCT_BR_PORT_MSG
  94         [RTM_DELMDB - RTM_BASE] = decode_br_port_msg,
  95         [RTM_GETMDB - RTM_BASE] = decode_br_port_msg,
  96         [RTM_NEWMDB - RTM_BASE] = decode_br_port_msg,
  97 #endif
  98
  99         [RTM_DELNSID - RTM_BASE] = decode_rtgenmsg,
 100         [RTM_GETNSID - RTM_BASE] = decode_rtgenmsg,
 101         [RTM_NEWNSID - RTM_BASE] = decode_rtgenmsg,
 102
 103         [RTM_NEWCHAIN - RTM_BASE] = decode_tcmsg,
 104         [RTM_DELCHAIN - RTM_BASE] = decode_tcmsg,
 105         [RTM_GETCHAIN - RTM_BASE] = decode_tcmsg,
 106 };
 107
 108 bool
 109 decode_netlink_route(struct tcb *const tcp,
 110                      const struct nlmsghdr *const nlmsghdr,
 111                      const kernel_ulong_t addr,
 112                      const unsigned int len)
 113 {
 114         uint8_t family;
 115
 116         if (nlmsghdr->nlmsg_type == NLMSG_DONE)
 117                 return false;
 118
 119         if (!umove_or_printaddr(tcp, addr, &family)) {
 120                 const unsigned int index = nlmsghdr->nlmsg_type - RTM_BASE;
 121
 122                 if (index < ARRAY_SIZE(route_decoders)
 123                     && route_decoders[index]) {
 124                         route_decoders[index](tcp, nlmsghdr, family, addr, len);
 125                 } else {
 126                         decode_family(tcp, family, addr, len);
 127                 }
 128         }
 129
 130         return true;
 131 }