1 /* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
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.
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.
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/>.
16 #define DHCP_SERVER_PORT 67
17 #define DHCP_CLIENT_PORT 68
18 #define DHCP_SERVER_ALTPORT 1067
19 #define DHCP_CLIENT_ALTPORT 1068
24 #define DHCP_COOKIE 0x63825363
26 /* The Linux in-kernel DHCP client silently ignores any packet
27 smaller than this. Sigh........... */
28 #define MIN_PACKETSZ 300
31 #define OPTION_NETMASK 1
32 #define OPTION_ROUTER 3
33 #define OPTION_DNSSERVER 6
34 #define OPTION_HOSTNAME 12
35 #define OPTION_DOMAINNAME 15
36 #define OPTION_BROADCAST 28
37 #define OPTION_VENDOR_CLASS_OPT 43
38 #define OPTION_REQUESTED_IP 50
39 #define OPTION_LEASE_TIME 51
40 #define OPTION_OVERLOAD 52
41 #define OPTION_MESSAGE_TYPE 53
42 #define OPTION_SERVER_IDENTIFIER 54
43 #define OPTION_REQUESTED_OPTIONS 55
44 #define OPTION_MESSAGE 56
45 #define OPTION_MAXMESSAGE 57
48 #define OPTION_VENDOR_ID 60
49 #define OPTION_CLIENT_ID 61
50 #define OPTION_SNAME 66
51 #define OPTION_FILENAME 67
52 #define OPTION_USER_CLASS 77
53 #define OPTION_CLIENT_FQDN 81
54 #define OPTION_AGENT_ID 82
55 #define OPTION_ARCH 93
56 #define OPTION_PXE_UUID 97
57 #define OPTION_SUBNET_SELECT 118
58 #define OPTION_DOMAIN_SEARCH 119
59 #define OPTION_SIP_SERVER 120
60 #define OPTION_VENDOR_IDENT 124
61 #define OPTION_VENDOR_IDENT_OPT 125
62 #define OPTION_END 255
64 #define SUBOPT_CIRCUIT_ID 1
65 #define SUBOPT_REMOTE_ID 2
66 #define SUBOPT_SUBNET_SELECT 5 /* RFC 3527 */
67 #define SUBOPT_SUBSCR_ID 6 /* RFC 3393 */
68 #define SUBOPT_SERVER_OR 11 /* RFC 5107 */
70 #define SUBOPT_PXE_BOOT_ITEM 71 /* PXE standard */
71 #define SUBOPT_PXE_DISCOVERY 6
72 #define SUBOPT_PXE_SERVERS 8
73 #define SUBOPT_PXE_MENU 9
74 #define SUBOPT_PXE_MENU_PROMPT 10
76 #define DHCPDISCOVER 1
85 #define BRDBAND_FORUM_IANA 3561 /* Broadband forum IANA enterprise */
87 #define DHCP_CHADDR_MAX 16
90 u8 op
, htype
, hlen
, hops
;
93 struct in_addr ciaddr
, yiaddr
, siaddr
, giaddr
;
94 u8 chaddr
[DHCP_CHADDR_MAX
], sname
[64], file
[128];