LCOV - code coverage report
Current view: top level - strace - netlink_packet_diag.c (source / functions) Hit Total Coverage
Test: strace-4.18.0.129.97bbb Code Coverage Lines: 78 78 100.0 %
Date: 2017-07-31 03:46:08 Functions: 7 7 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 25 26 96.2 %

           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                 :            : #include "nlattr.h"
      34                 :            : #include "print_fields.h"
      35                 :            : 
      36                 :            : #include <linux/filter.h>
      37                 :            : #include <linux/sock_diag.h>
      38                 :            : #include <linux/packet_diag.h>
      39                 :            : 
      40                 :            : #include "xlat/packet_diag_attrs.h"
      41                 :            : #include "xlat/packet_diag_info_flags.h"
      42                 :            : #include "xlat/packet_diag_show.h"
      43                 :            : 
      44                 :          6 : DECL_NETLINK_DIAG_DECODER(decode_packet_diag_req)
      45                 :            : {
      46                 :          6 :         struct packet_diag_req req = { .sdiag_family = family };
      47                 :          6 :         const size_t offset = sizeof(req.sdiag_family);
      48                 :            : 
      49                 :          6 :         PRINT_FIELD_XVAL("{", req, sdiag_family, addrfams, "AF_???");
      50                 :          6 :         tprints(", ");
      51         [ +  + ]:          6 :         if (len >= sizeof(req)) {
      52         [ +  + ]:          4 :                 if (!umoven_or_printaddr(tcp, addr + offset,
      53                 :            :                                          sizeof(req) - offset,
      54                 :            :                                          (void *) &req + offset)) {
      55                 :          2 :                         PRINT_FIELD_XVAL("", req, sdiag_protocol,
      56                 :            :                                          ethernet_protocols, "ETH_P_???");
      57                 :          2 :                         PRINT_FIELD_U(", ", req, pdiag_ino);
      58                 :          2 :                         PRINT_FIELD_FLAGS(", ", req, pdiag_show,
      59                 :            :                                           packet_diag_show, "PACKET_SHOW_???");
      60                 :          2 :                         PRINT_FIELD_COOKIE(", ", req, pdiag_cookie);
      61                 :            :                 }
      62                 :            :         } else
      63                 :          2 :                 tprints("...");
      64                 :          6 :         tprints("}");
      65                 :          6 : }
      66                 :            : 
      67                 :            : static bool
      68                 :          6 : decode_packet_diag_info(struct tcb *const tcp,
      69                 :            :                         const kernel_ulong_t addr,
      70                 :            :                         const unsigned int len,
      71                 :            :                         const void *const opaque_data)
      72                 :            : {
      73                 :            :         struct packet_diag_info pinfo;
      74                 :            : 
      75         [ +  + ]:          6 :         if (len < sizeof(pinfo))
      76                 :            :                 return false;
      77         [ +  + ]:          4 :         if (umove_or_printaddr(tcp, addr, &pinfo))
      78                 :            :                 return true;
      79                 :            : 
      80                 :          2 :         PRINT_FIELD_U("{", pinfo, pdi_index);
      81                 :          2 :         PRINT_FIELD_U(", ", pinfo, pdi_version);
      82                 :          2 :         PRINT_FIELD_U(", ", pinfo, pdi_reserve);
      83                 :          2 :         PRINT_FIELD_U(", ", pinfo, pdi_copy_thresh);
      84                 :          2 :         PRINT_FIELD_U(", ", pinfo, pdi_tstamp);
      85                 :          2 :         PRINT_FIELD_FLAGS(", ", pinfo, pdi_flags,
      86                 :            :                           packet_diag_info_flags, "PDI_???");
      87                 :          2 :         tprints("}");
      88                 :            : 
      89                 :          2 :         return true;
      90                 :            : }
      91                 :            : 
      92                 :            : static bool
      93                 :          8 : print_packet_diag_mclist(struct tcb *const tcp, void *const elem_buf,
      94                 :            :                          const size_t elem_size, void *const opaque_data)
      95                 :            : {
      96                 :          8 :         struct packet_diag_mclist *dml = elem_buf;
      97                 :          8 :         uint16_t alen = dml->pdmc_alen > sizeof(dml->pdmc_addr) ?
      98                 :          8 :                 sizeof(dml->pdmc_addr) : dml->pdmc_alen;
      99                 :            : 
     100                 :          8 :         PRINT_FIELD_IFINDEX("{", *dml, pdmc_index);
     101                 :          8 :         PRINT_FIELD_U(", ", *dml, pdmc_count);
     102                 :          8 :         PRINT_FIELD_U(", ", *dml, pdmc_type);
     103                 :          8 :         PRINT_FIELD_U(", ", *dml, pdmc_alen);
     104                 :          8 :         PRINT_FIELD_STRING(", ", *dml, pdmc_addr, alen, QUOTE_FORCE_HEX);
     105                 :          8 :         tprints("}");
     106                 :            : 
     107                 :          8 :         return true;
     108                 :            : }
     109                 :            : 
     110                 :            : static bool
     111                 :          8 : decode_packet_diag_mclist(struct tcb *const tcp,
     112                 :            :                           const kernel_ulong_t addr,
     113                 :            :                           const unsigned int len,
     114                 :            :                           const void *const opaque_data)
     115                 :            : {
     116                 :            :         struct packet_diag_mclist dml;
     117                 :          8 :         const size_t nmemb = len / sizeof(dml);
     118                 :            : 
     119         [ +  + ]:          8 :         if (!nmemb)
     120                 :            :                 return false;
     121                 :            : 
     122                 :          6 :         print_array(tcp, addr, nmemb, &dml, sizeof(dml),
     123                 :            :                     umoven_or_printaddr, print_packet_diag_mclist, 0);
     124                 :            : 
     125                 :          6 :         return true;
     126                 :            : }
     127                 :            : 
     128                 :            : static bool
     129                 :          6 : decode_packet_diag_ring(struct tcb *const tcp,
     130                 :            :                         const kernel_ulong_t addr,
     131                 :            :                         const unsigned int len,
     132                 :            :                         const void *const opaque_data)
     133                 :            : {
     134                 :            :         struct packet_diag_ring pdr;
     135                 :            : 
     136         [ +  + ]:          6 :         if (len < sizeof(pdr))
     137                 :            :                 return false;
     138         [ +  + ]:          4 :         if (umove_or_printaddr(tcp, addr, &pdr))
     139                 :            :                 return true;
     140                 :            : 
     141                 :          2 :         PRINT_FIELD_U("{", pdr, pdr_block_size);
     142                 :          2 :         PRINT_FIELD_U(", ", pdr, pdr_block_nr);
     143                 :          2 :         PRINT_FIELD_U(", ", pdr, pdr_frame_size);
     144                 :          2 :         PRINT_FIELD_U(", ", pdr, pdr_frame_nr);
     145                 :          2 :         PRINT_FIELD_U(", ", pdr, pdr_retire_tmo);
     146                 :          2 :         PRINT_FIELD_U(", ", pdr, pdr_sizeof_priv);
     147                 :          2 :         PRINT_FIELD_U(", ", pdr, pdr_features);
     148                 :          2 :         tprints("}");
     149                 :            : 
     150                 :          2 :         return true;
     151                 :            : }
     152                 :            : 
     153                 :            : static bool
     154                 :          8 : decode_packet_diag_filter(struct tcb *const tcp,
     155                 :            :                           const kernel_ulong_t addr,
     156                 :            :                           const unsigned int len,
     157                 :            :                           const void *const opaque_data)
     158                 :            : {
     159                 :          8 :         const unsigned int nmemb = len / sizeof(struct sock_filter);
     160 [ +  + ][ +  - ]:          8 :         if (!nmemb || (unsigned short) nmemb != nmemb)
     161                 :            :                 return false;
     162                 :            : 
     163                 :          6 :         print_sock_fprog(tcp, addr, nmemb);
     164                 :            : 
     165                 :          6 :         return true;
     166                 :            : }
     167                 :            : 
     168                 :            : static const nla_decoder_t packet_diag_msg_nla_decoders[] = {
     169                 :            :         [PACKET_DIAG_INFO]      = decode_packet_diag_info,
     170                 :            :         [PACKET_DIAG_MCLIST]    = decode_packet_diag_mclist,
     171                 :            :         [PACKET_DIAG_RX_RING]   = decode_packet_diag_ring,
     172                 :            :         [PACKET_DIAG_TX_RING]   = decode_packet_diag_ring,
     173                 :            :         [PACKET_DIAG_FANOUT]    = decode_nla_u32,
     174                 :            :         [PACKET_DIAG_UID]       = decode_nla_u32,
     175                 :            :         [PACKET_DIAG_MEMINFO]   = decode_nla_meminfo,
     176                 :            :         [PACKET_DIAG_FILTER]    = decode_packet_diag_filter
     177                 :            : };
     178                 :            : 
     179                 :         34 : DECL_NETLINK_DIAG_DECODER(decode_packet_diag_msg)
     180                 :            : {
     181                 :         34 :         struct packet_diag_msg msg = { .pdiag_family = family };
     182                 :         34 :         size_t offset = sizeof(msg.pdiag_family);
     183                 :         34 :         bool decode_nla = false;
     184                 :            : 
     185                 :         34 :         PRINT_FIELD_XVAL("{", msg, pdiag_family, addrfams, "AF_???");
     186                 :         34 :         tprints(", ");
     187         [ +  + ]:         34 :         if (len >= sizeof(msg)) {
     188         [ +  + ]:         32 :                 if (!umoven_or_printaddr(tcp, addr + offset,
     189                 :            :                                          sizeof(msg) - offset,
     190                 :            :                                          (void *) &msg + offset)) {
     191                 :         30 :                         PRINT_FIELD_XVAL("", msg, pdiag_type,
     192                 :            :                                          socktypes, "SOCK_???");
     193                 :         30 :                         PRINT_FIELD_U(", ", msg, pdiag_num);
     194                 :         30 :                         PRINT_FIELD_U(", ", msg, pdiag_ino);
     195                 :         30 :                         PRINT_FIELD_COOKIE(", ", msg, pdiag_cookie);
     196                 :         30 :                         decode_nla = true;
     197                 :            :                 }
     198                 :            :         } else
     199                 :          2 :                 tprints("...");
     200                 :         34 :         tprints("}");
     201                 :            : 
     202                 :         34 :         offset = NLMSG_ALIGN(sizeof(msg));
     203 [ +  + ][ +  + ]:         34 :         if (decode_nla && len > offset) {
     204                 :         28 :                 tprints(", ");
     205                 :         28 :                 decode_nlattr(tcp, addr + offset, len - offset,
     206                 :            :                               packet_diag_attrs, "PACKET_DIAG_???",
     207                 :            :                               packet_diag_msg_nla_decoders,
     208                 :            :                               ARRAY_SIZE(packet_diag_msg_nla_decoders), NULL);
     209                 :            :         }
     210                 :         34 : }

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