LCOV - code coverage report
Current view: top level - strace - netlink_sock_diag.c (source / functions) Hit Total Coverage
Test: strace-4.18.0.129.97bbb Code Coverage Lines: 21 21 100.0 %
Date: 2017-07-31 03:46:08 Functions: 2 2 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 14 14 100.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
       3                 :            :  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
       4                 :            :  * Copyright (c) 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.h"
      32                 :            : #include "netlink_sock_diag.h"
      33                 :            : 
      34                 :            : static void
      35                 :         36 : decode_family(struct tcb *const tcp, const uint8_t family,
      36                 :            :               const kernel_ulong_t addr, const unsigned int len)
      37                 :            : {
      38                 :         36 :         tprints("{family=");
      39                 :         36 :         printxval(addrfams, family, "AF_???");
      40         [ +  + ]:         36 :         if (len > sizeof(family)) {
      41                 :          8 :                 tprints(", ");
      42                 :          8 :                 printstr_ex(tcp, addr + sizeof(family),
      43                 :            :                             len - sizeof(family), QUOTE_FORCE_HEX);
      44                 :            :         }
      45                 :         36 :         tprints("}");
      46                 :         36 : }
      47                 :            : 
      48                 :            : typedef DECL_NETLINK_DIAG_DECODER((*netlink_diag_decoder_t));
      49                 :            : 
      50                 :            : static const struct {
      51                 :            :         const netlink_diag_decoder_t request, response;
      52                 :            : } diag_decoders[] = {
      53                 :            :         [AF_INET] = { decode_inet_diag_req, decode_inet_diag_msg },
      54                 :            :         [AF_INET6] = { decode_inet_diag_req, decode_inet_diag_msg },
      55                 :            :         [AF_NETLINK] = { decode_netlink_diag_req, decode_netlink_diag_msg },
      56                 :            :         [AF_PACKET] = { decode_packet_diag_req, decode_packet_diag_msg },
      57                 :            : #ifdef AF_SMC
      58                 :            :         [AF_SMC] = { decode_smc_diag_req, decode_smc_diag_msg },
      59                 :            : #endif
      60                 :            :         [AF_UNIX] = { decode_unix_diag_req, decode_unix_diag_msg }
      61                 :            : };
      62                 :            : 
      63                 :            : bool
      64                 :        298 : decode_netlink_sock_diag(struct tcb *const tcp,
      65                 :            :                          const struct nlmsghdr *const nlmsghdr,
      66                 :            :                          const kernel_ulong_t addr,
      67                 :            :                          const unsigned int len)
      68                 :            : {
      69                 :            :         uint8_t family;
      70                 :            : 
      71         [ +  + ]:        298 :         if (nlmsghdr->nlmsg_type == NLMSG_DONE)
      72                 :            :                 return false;
      73                 :            : 
      74         [ +  + ]:        292 :         if (!umove_or_printaddr(tcp, addr, &family)) {
      75         [ +  + ]:        288 :                 if (family < ARRAY_SIZE(diag_decoders)
      76         [ +  + ]:        280 :                     && len > sizeof(family)) {
      77                 :        256 :                         const netlink_diag_decoder_t decoder =
      78                 :        256 :                                 (nlmsghdr->nlmsg_flags & NLM_F_REQUEST)
      79                 :         88 :                                 ? diag_decoders[family].request
      80         [ +  + ]:        256 :                                 : diag_decoders[family].response;
      81                 :            : 
      82         [ +  + ]:        256 :                         if (decoder) {
      83                 :        252 :                                 decoder(tcp, nlmsghdr, family, addr, len);
      84                 :        252 :                                 return true;
      85                 :            :                         }
      86                 :            :                 }
      87                 :            : 
      88                 :         36 :                 decode_family(tcp, family, addr, len);
      89                 :            :         }
      90                 :            : 
      91                 :            :         return true;
      92                 :            : }

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