Line data    Source code

       1             : /*
       2             :  * ethernet/arp.c: IP v4 ARP node
       3             :  *
       4             :  * Copyright (c) 2010 Cisco and/or its affiliates.
       5             :  * Licensed under the Apache License, Version 2.0 (the "License");
       6             :  * you may not use this file except in compliance with the License.
       7             :  * You may obtain a copy of the License at:
       8             :  *
       9             :  *     http://www.apache.org/licenses/LICENSE-2.0
      10             :  *
      11             :  * Unless required by applicable law or agreed to in writing, software
      12             :  * distributed under the License is distributed on an "AS IS" BASIS,
      13             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      14             :  * See the License for the specific language governing permissions and
      15             :  * limitations under the License.
      16             :  */
      17             : 
      18             : #include <vnet/ethernet/arp_packet.h>
      19             : #include <vnet/ethernet/ethernet.h>
      20             : #include <vnet/ip/format.h>
      21             : 
      22             : u8 *
      23        8290 : format_ethernet_arp_opcode (u8 * s, va_list * va)
      24             : {
      25        8290 :   ethernet_arp_opcode_t o = va_arg (*va, ethernet_arp_opcode_t);
      26        8290 :   char *t = 0;
      27        8290 :   switch (o)
      28             :     {
      29             : #define _(f) case ETHERNET_ARP_OPCODE_##f: t = #f; break;
      30        8290 :       foreach_ethernet_arp_opcode;
      31             : #undef _
      32             : 
      33           0 :     default:
      34           0 :       return format (s, "unknown 0x%x", o);
      35             :     }
      36             : 
      37        8290 :   return format (s, "%s", t);
      38             : }
      39             : 
      40             : u8 *
      41        8290 : format_ethernet_arp_hardware_type (u8 * s, va_list * va)
      42             : {
      43        8290 :   ethernet_arp_hardware_type_t h = va_arg (*va, ethernet_arp_hardware_type_t);
      44        8290 :   char *t = 0;
      45        8290 :   switch (h)
      46             :     {
      47             : #define _(n,f) case n: t = #f; break;
      48        8290 :       foreach_ethernet_arp_hardware_type;
      49             : #undef _
      50             : 
      51           0 :     default:
      52           0 :       return format (s, "unknown 0x%x", h);
      53             :     }
      54             : 
      55        8290 :   return format (s, "%s", t);
      56             : }
      57             : 
      58             : u8 *
      59        8290 : format_ethernet_arp_header (u8 * s, va_list * va)
      60             : {
      61        8290 :   ethernet_arp_header_t *a = va_arg (*va, ethernet_arp_header_t *);
      62        8290 :   u32 max_header_bytes = va_arg (*va, u32);
      63             :   u32 indent;
      64             :   u16 l2_type, l3_type;
      65             : 
      66        8290 :   if (max_header_bytes != 0 && sizeof (a[0]) > max_header_bytes)
      67           0 :     return format (s, "ARP header truncated");
      68             : 
      69        8290 :   l2_type = clib_net_to_host_u16 (a->l2_type);
      70        8290 :   l3_type = clib_net_to_host_u16 (a->l3_type);
      71             : 
      72        8290 :   indent = format_get_indent (s);
      73             : 
      74        8290 :   s = format (s, "%U, type %U/%U, address size %d/%d",
      75        8290 :               format_ethernet_arp_opcode, clib_net_to_host_u16 (a->opcode),
      76             :               format_ethernet_arp_hardware_type, l2_type,
      77             :               format_ethernet_type, l3_type,
      78        8290 :               a->n_l2_address_bytes, a->n_l3_address_bytes);
      79             : 
      80        8290 :   if (l2_type == ETHERNET_ARP_HARDWARE_TYPE_ethernet
      81        8290 :       && l3_type == ETHERNET_TYPE_IP4)
      82             :     {
      83        8290 :       s = format (s, "\n%U%U/%U -> %U/%U",
      84             :                   format_white_space, indent,
      85             :                   format_mac_address_t, &a->ip4_over_ethernet[0].mac,
      86             :                   format_ip4_address, &a->ip4_over_ethernet[0].ip4,
      87             :                   format_mac_address_t, &a->ip4_over_ethernet[1].mac,
      88             :                   format_ip4_address, &a->ip4_over_ethernet[1].ip4);
      89             :     }
      90             :   else
      91             :     {
      92           0 :       uword n2 = a->n_l2_address_bytes;
      93           0 :       uword n3 = a->n_l3_address_bytes;
      94           0 :       s = format (s, "\n%U%U/%U -> %U/%U",
      95             :                   format_white_space, indent,
      96           0 :                   format_hex_bytes, a->data + 0 * n2 + 0 * n3, n2,
      97           0 :                   format_hex_bytes, a->data + 1 * n2 + 0 * n3, n3,
      98           0 :                   format_hex_bytes, a->data + 1 * n2 + 1 * n3, n2,
      99           0 :                   format_hex_bytes, a->data + 2 * n2 + 1 * n3, n3);
     100             :     }
     101             : 
     102        8290 :   return s;
     103             : }
     104             : 
     105             : /*
     106             :  * fd.io coding-style-patch-verification: ON
     107             :  *
     108             :  * Local Variables:
     109             :  * eval: (c-set-style "gnu")
     110             :  * End:
     111             :  */