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* OpenVPN -- An application to securely tunnel IP networks
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* over a single TCP/UDP port, with support for SSL/TLS-based
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* session authentication and key exchange,
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* packet encryption, packet authentication, and
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* Copyright (C) 2002-2008 Telethra, Inc. <sales@openvpn.net>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program (see the file COPYING included with this
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* distribution); if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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/* DHCP Option types */
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#define DHCP_MSG_TYPE 53 /* message type (u8) */
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/* DHCP Messages types */
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#define DHCPDISCOVER 1
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/* DHCP UDP port numbers */
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#define BOOTPS_PORT 67
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#define BOOTPC_PORT 68
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# define BOOTREQUEST 1
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uint8_t op; /* message op */
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uint8_t htype; /* hardware address type (e.g. '1' = 10Mb Ethernet) */
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uint8_t hlen; /* hardware address length (e.g. '6' for 10Mb Ethernet) */
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uint8_t hops; /* client sets to 0, may be used by relay agents */
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uint32_t xid; /* transaction ID, chosen by client */
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uint16_t secs; /* seconds since request process began, set by client */
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uint32_t ciaddr; /* client IP address, client sets if known */
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uint32_t yiaddr; /* 'your' IP address -- server's response to client */
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uint32_t siaddr; /* server IP address */
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uint32_t giaddr; /* relay agent IP address */
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uint8_t chaddr[16]; /* client hardware address */
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uint8_t sname[64]; /* optional server host name */
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uint8_t file[128]; /* boot file name */
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uint32_t magic; /* must be 0x63825363 (network order) */
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struct openvpn_iphdr ip;
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struct openvpn_udphdr udp;
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# define DHCP_OPTIONS_BUFFER_SIZE 256
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uint8_t options[DHCP_OPTIONS_BUFFER_SIZE];
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in_addr_t dhcp_extract_router_msg (struct buffer *ipbuf);
added
removed
dhcp.h
