132 lines
3.6 KiB
C
132 lines
3.6 KiB
C
/**
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* @file dhcp_proto.h
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* @author Ambroz Bizjak <ambrop7@gmail.com>
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*
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* @section LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @section DESCRIPTION
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*
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* Definitions for the DHCP protocol.
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*/
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#ifndef BADVPN_MISC_DHCP_PROTO_H
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#define BADVPN_MISC_DHCP_PROTO_H
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#include <stdint.h>
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#include <misc/packed.h>
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#define DHCP_OP_BOOTREQUEST 1
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#define DHCP_OP_BOOTREPLY 2
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#define DHCP_HARDWARE_ADDRESS_TYPE_ETHERNET 1
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#define DHCP_MAGIC 0x63825363
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#define DHCP_OPTION_PAD 0
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#define DHCP_OPTION_END 255
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#define DHCP_OPTION_SUBNET_MASK 1
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#define DHCP_OPTION_ROUTER 3
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#define DHCP_OPTION_DOMAIN_NAME_SERVER 6
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#define DHCP_OPTION_HOST_NAME 12
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#define DHCP_OPTION_REQUESTED_IP_ADDRESS 50
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#define DHCP_OPTION_IP_ADDRESS_LEASE_TIME 51
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#define DHCP_OPTION_DHCP_MESSAGE_TYPE 53
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#define DHCP_OPTION_DHCP_SERVER_IDENTIFIER 54
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#define DHCP_OPTION_PARAMETER_REQUEST_LIST 55
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#define DHCP_OPTION_MAXIMUM_MESSAGE_SIZE 57
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#define DHCP_OPTION_RENEWAL_TIME_VALUE 58
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#define DHCP_OPTION_REBINDING_TIME_VALUE 59
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#define DHCP_OPTION_VENDOR_CLASS_IDENTIFIER 60
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#define DHCP_OPTION_CLIENT_IDENTIFIER 61
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#define DHCP_MESSAGE_TYPE_DISCOVER 1
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#define DHCP_MESSAGE_TYPE_OFFER 2
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#define DHCP_MESSAGE_TYPE_REQUEST 3
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#define DHCP_MESSAGE_TYPE_DECLINE 4
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#define DHCP_MESSAGE_TYPE_ACK 5
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#define DHCP_MESSAGE_TYPE_NAK 6
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#define DHCP_MESSAGE_TYPE_RELEASE 7
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B_START_PACKED
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struct dhcp_header {
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uint8_t op;
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uint8_t htype;
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uint8_t hlen;
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uint8_t hops;
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uint32_t xid;
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uint16_t secs;
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uint16_t flags;
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uint32_t ciaddr;
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uint32_t yiaddr;
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uint32_t siaddr;
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uint32_t giaddr;
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uint8_t chaddr[16];
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uint8_t sname[64];
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uint8_t file[128];
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uint32_t magic;
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} B_PACKED;
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B_END_PACKED
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B_START_PACKED
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struct dhcp_option_header {
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uint8_t type;
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uint8_t len;
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} B_PACKED;
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B_END_PACKED
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B_START_PACKED
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struct dhcp_option_dhcp_message_type {
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uint8_t type;
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} B_PACKED;
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B_END_PACKED
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B_START_PACKED
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struct dhcp_option_maximum_message_size {
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uint16_t size;
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} B_PACKED;
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B_END_PACKED
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B_START_PACKED
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struct dhcp_option_dhcp_server_identifier {
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uint32_t id;
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} B_PACKED;
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B_END_PACKED
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B_START_PACKED
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struct dhcp_option_time {
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uint32_t time;
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} B_PACKED;
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B_END_PACKED
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B_START_PACKED
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struct dhcp_option_addr {
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uint32_t addr;
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} B_PACKED;
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B_END_PACKED
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#endif
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