release/src/router/dnsmasq/src/dhcp_protocol.h

   1 /* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; version 2 dated June, 1991, or
   6    (at your option) version 3 dated 29 June, 2007.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11    GNU General Public License for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15 */
  16
  17 #define BOOTREQUEST              1
  18 #define BOOTREPLY                2
  19 #define DHCP_COOKIE              0x63825363
  20
  21 /* The Linux in-kernel DHCP client silently ignores any packet
  22    smaller than this. Sigh...........   */
  23 #define MIN_PACKETSZ             300
  24
  25 #define OPTION_PAD               0
  26 #define OPTION_NETMASK           1
  27 #define OPTION_ROUTER            3
  28 #define OPTION_DNSSERVER         6
  29 #define OPTION_HOSTNAME          12
  30 #define OPTION_DOMAINNAME        15
  31 #define OPTION_BROADCAST         28
  32 #define OPTION_VENDOR_CLASS_OPT  43
  33 #define OPTION_REQUESTED_IP      50
  34 #define OPTION_LEASE_TIME        51
  35 #define OPTION_OVERLOAD          52
  36 #define OPTION_MESSAGE_TYPE      53
  37 #define OPTION_SERVER_IDENTIFIER 54
  38 #define OPTION_REQUESTED_OPTIONS 55
  39 #define OPTION_MESSAGE           56
  40 #define OPTION_MAXMESSAGE        57
  41 #define OPTION_T1                58
  42 #define OPTION_T2                59
  43 #define OPTION_VENDOR_ID         60
  44 #define OPTION_CLIENT_ID         61
  45 #define OPTION_SNAME             66
  46 #define OPTION_FILENAME          67
  47 #define OPTION_USER_CLASS        77
  48 #define OPTION_CLIENT_FQDN       81
  49 #define OPTION_AGENT_ID          82
  50 #define OPTION_ARCH              93
  51 #define OPTION_PXE_UUID          97
  52 #define OPTION_SUBNET_SELECT     118
  53 #define OPTION_DOMAIN_SEARCH     119
  54 #define OPTION_SIP_SERVER        120
  55 #define OPTION_VENDOR_IDENT      124
  56 #define OPTION_VENDOR_IDENT_OPT  125
  57 #define OPTION_END               255
  58
  59 #define SUBOPT_CIRCUIT_ID        1
  60 #define SUBOPT_REMOTE_ID         2
  61 #define SUBOPT_SUBNET_SELECT     5     /* RFC 3527 */
  62 #define SUBOPT_SUBSCR_ID         6     /* RFC 3393 */
  63 #define SUBOPT_SERVER_OR         11    /* RFC 5107 */
  64
  65 #define SUBOPT_PXE_BOOT_ITEM     71    /* PXE standard */
  66 #define SUBOPT_PXE_DISCOVERY     6
  67 #define SUBOPT_PXE_SERVERS       8
  68 #define SUBOPT_PXE_MENU          9
  69 #define SUBOPT_PXE_MENU_PROMPT   10
  70
  71 #define DHCPDISCOVER             1
  72 #define DHCPOFFER                2
  73 #define DHCPREQUEST              3
  74 #define DHCPDECLINE              4
  75 #define DHCPACK                  5
  76 #define DHCPNAK                  6
  77 #define DHCPRELEASE              7
  78 #define DHCPINFORM               8
  79
  80 #define BRDBAND_FORUM_IANA       3561 /* Broadband forum IANA enterprise */
  81
  82 #define DHCP_CHADDR_MAX 16
  83
  84 struct dhcp_packet {
  85   u8 op, htype, hlen, hops;
  86   u32 xid;
  87   u16 secs, flags;
  88   struct in_addr ciaddr, yiaddr, siaddr, giaddr;
  89   u8 chaddr[DHCP_CHADDR_MAX], sname[64], file[128];
  90   u8 options[312];
  91 };