kernel/include/net/arp.h

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef _ARP_H
  20 #define _ARP_H
  21
  22 #define MIN_ARP_SIZE 28
  23
  24 #define __PACKED__ __attribute__ ((__packed__))
  25
  26 typedef struct arp_cache_context {
  27         struct arp_cache_context *next, *prev;
  28
  29         net_ipv4 ip;
  30         mac_addr_t mac;
  31 } arp_cache_t;
  32
  33 typedef struct proto_arp_t {
  34         unsigned short hard_type;
  35         unsigned short prot_type;
  36         unsigned char hard_size;
  37         unsigned char prot_size;
  38         unsigned short op;
  39         mac_addr_t sender_ethernet;
  40         net_ipv4 sender_ipv4;
  41         mac_addr_t target_ethernet;
  42         net_ipv4 target_ipv4;
  43 } __PACKED__ proto_arp_t;
  44
  45 enum {
  46         ARP_OP_REQUEST = 0x100,
  47         ARP_OP_REPLY = 0x200,
  48         ARP_OP_RARP_REQUEST,
  49         ARP_OP_RARP_REPLY
  50 };
  51
  52 enum {
  53         ARP_HARD_TYPE_ETHERNET = 0x100
  54 };
  55
  56 extern unsigned arp_cache_add (mac_addr_t mac, net_ipv4 ip);
  57 extern unsigned arp_cache_get (net_ipv4 ip, mac_addr_t *mac);
  58 extern unsigned init_proto_arp ();
  59
  60 #endif