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/* dnsmasq is Copyright (c) 2000-2022 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 dated June, 1991, or
(at your option) version 3 dated 29 June, 2007.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define DHCP_SERVER_PORT 67
#define DHCP_CLIENT_PORT 68
#define DHCP_SERVER_ALTPORT 1067
#define DHCP_CLIENT_ALTPORT 1068
#define PXE_PORT 4011
/* These each hold a DHCP option max size 255
and get a terminating zero added */
#define DHCP_BUFF_SZ 256
#define BOOTREQUEST 1
#define BOOTREPLY 2
#define DHCP_COOKIE 0x63825363
/* The Linux in-kernel DHCP client silently ignores any packet
smaller than this. Sigh........... */
#define MIN_PACKETSZ 300
#define OPTION_PAD 0
#define OPTION_NETMASK 1
#define OPTION_ROUTER 3
#define OPTION_DNSSERVER 6
#define OPTION_HOSTNAME 12
#define OPTION_DOMAINNAME 15
#define OPTION_BROADCAST 28
#define OPTION_VENDOR_CLASS_OPT 43
#define OPTION_REQUESTED_IP 50
#define OPTION_LEASE_TIME 51
#define OPTION_OVERLOAD 52
#define OPTION_MESSAGE_TYPE 53
#define OPTION_SERVER_IDENTIFIER 54
#define OPTION_REQUESTED_OPTIONS 55
#define OPTION_MESSAGE 56
#define OPTION_MAXMESSAGE 57
#define OPTION_T1 58
#define OPTION_T2 59
#define OPTION_VENDOR_ID 60
#define OPTION_CLIENT_ID 61
#define OPTION_SNAME 66
#define OPTION_FILENAME 67
#define OPTION_USER_CLASS 77
#define OPTION_RAPID_COMMIT 80
#define OPTION_CLIENT_FQDN 81
#define OPTION_AGENT_ID 82
#define OPTION_ARCH 93
#define OPTION_PXE_UUID 97
#define OPTION_SUBNET_SELECT 118
#define OPTION_DOMAIN_SEARCH 119
#define OPTION_SIP_SERVER 120
#define OPTION_VENDOR_IDENT 124
#define OPTION_VENDOR_IDENT_OPT 125
#define OPTION_MUD_URL_V4 161
#define OPTION_END 255
#define SUBOPT_CIRCUIT_ID 1
#define SUBOPT_REMOTE_ID 2
#define SUBOPT_SUBNET_SELECT 5 /* RFC 3527 */
#define SUBOPT_SUBSCR_ID 6 /* RFC 3393 */
#define SUBOPT_SERVER_OR 11 /* RFC 5107 */
#define SUBOPT_PXE_BOOT_ITEM 71 /* PXE standard */
#define SUBOPT_PXE_DISCOVERY 6
#define SUBOPT_PXE_SERVERS 8
#define SUBOPT_PXE_MENU 9
#define SUBOPT_PXE_MENU_PROMPT 10
#define DHCPDISCOVER 1
#define DHCPOFFER 2
#define DHCPREQUEST 3
#define DHCPDECLINE 4
#define DHCPACK 5
#define DHCPNAK 6
#define DHCPRELEASE 7
#define DHCPINFORM 8
#define BRDBAND_FORUM_IANA 3561 /* Broadband forum IANA enterprise */
#define DHCP_CHADDR_MAX 16
struct dhcp_packet {
u8 op, htype, hlen, hops;
u32 xid;
u16 secs, flags;
struct in_addr ciaddr, yiaddr, siaddr, giaddr;
u8 chaddr[DHCP_CHADDR_MAX], sname[64], file[128];
u8 options[312];
};
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