Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2015-2019 Cisco and/or its affiliates.
       3             :  * Licensed under the Apache License, Version 2.0 (the "License");
       4             :  * you may not use this file except in compliance with the License.
       5             :  * You may obtain a copy of the License at:
       6             :  *
       7             :  *     http://www.apache.org/licenses/LICENSE-2.0
       8             :  *
       9             :  * Unless required by applicable law or agreed to in writing, software
      10             :  * distributed under the License is distributed on an "AS IS" BASIS,
      11             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             :  * See the License for the specific language governing permissions and
      13             :  * limitations under the License.
      14             :  */
      15             : /*
      16             :  * ip/udp_format.c: udp formatting
      17             :  *
      18             :  * Copyright (c) 2008 Eliot Dresselhaus
      19             :  *
      20             :  * Permission is hereby granted, free of charge, to any person obtaining
      21             :  * a copy of this software and associated documentation files (the
      22             :  * "Software"), to deal in the Software without restriction, including
      23             :  * without limitation the rights to use, copy, modify, merge, publish,
      24             :  * distribute, sublicense, and/or sell copies of the Software, and to
      25             :  * permit persons to whom the Software is furnished to do so, subject to
      26             :  * the following conditions:
      27             :  *
      28             :  * The above copyright notice and this permission notice shall be
      29             :  * included in all copies or substantial portions of the Software.
      30             :  *
      31             :  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
      32             :  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
      33             :  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
      34             :  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
      35             :  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
      36             :  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
      37             :  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
      38             :  */
      39             : 
      40             : #include <vnet/ip/ip.h>
      41             : 
      42             : /* Format UDP header. */
      43             : u8 *
      44      205405 : format_udp_header (u8 * s, va_list * args)
      45             : {
      46      205405 :   udp_header_t *udp = va_arg (*args, udp_header_t *);
      47      205405 :   u32 max_header_bytes = va_arg (*args, u32);
      48             :   u32 indent;
      49      205405 :   u32 header_bytes = sizeof (udp[0]);
      50             : 
      51             :   /* Nothing to do. */
      52      205405 :   if (max_header_bytes < sizeof (udp[0]))
      53           0 :     return format (s, "UDP header truncated");
      54             : 
      55      205405 :   indent = format_get_indent (s);
      56      205405 :   indent += 2;
      57             : 
      58      205405 :   s = format (s, "UDP: %d -> %d",
      59      205405 :               clib_net_to_host_u16 (udp->src_port),
      60      205405 :               clib_net_to_host_u16 (udp->dst_port));
      61             : 
      62      205405 :   s = format (s, "\n%Ulength %d, checksum 0x%04x",
      63             :               format_white_space, indent,
      64      205405 :               clib_net_to_host_u16 (udp->length),
      65      205405 :               clib_net_to_host_u16 (udp->checksum));
      66             : 
      67             :   /* Recurse into next protocol layer. */
      68      205405 :   if (max_header_bytes != 0 && header_bytes < max_header_bytes)
      69             :     {
      70      204820 :       ip_main_t *im = &ip_main;
      71             :       tcp_udp_port_info_t *pi;
      72             : 
      73      204820 :       pi = ip_get_tcp_udp_port_info (im, udp->dst_port);
      74             : 
      75      204820 :       if (pi && pi->format_header)
      76           0 :         s = format (s, "\n%U%U",
      77             :                     format_white_space, indent - 2, pi->format_header,
      78             :                     /* next protocol header */ (udp + 1),
      79             :                     max_header_bytes - sizeof (udp[0]));
      80             :     }
      81             : 
      82      205405 :   return s;
      83             : }
      84             : 
      85             : uword
      86           0 : unformat_udp_port (unformat_input_t * input, va_list * args)
      87             : {
      88           0 :   u16 *result = va_arg (*args, u16 *);
      89             :   int port;
      90             : 
      91             :   /* Numeric type. */
      92           0 :   if (unformat (input, "0x%x", &port) || unformat (input, "%d", &port))
      93             :     {
      94           0 :       if (port <= 0 || port >= (1 << 16))
      95           0 :         return 0;
      96           0 :       *result = port;
      97           0 :       return 1;
      98             :     }
      99           0 :   return 0;
     100             : }
     101             : 
     102             : /*
     103             :  * fd.io coding-style-patch-verification: ON
     104             :  *
     105             :  * Local Variables:
     106             :  * eval: (c-set-style "gnu")
     107             :  * End:
     108             :  */