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/*
* Copyright (c) 2008, 2011 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef DHCP_H
#define DHCP_H 1
#include <stdint.h>
#include "packets.h"
#include "util.h"
/* Ports used by DHCP. */
#define DHCP_SERVER_PORT 67 /* Port used by DHCP server. */
#define DHCP_CLIENT_PORT 68 /* Port used by DHCP client. */
#define DHCP_MAGIC_COOKIE 0x63825363
#define DHCP_HEADER_LEN 236
struct dhcp_header {
uint8_t op; /* DHCP_BOOTREQUEST or DHCP_BOOTREPLY. */
uint8_t htype; /* ARP_HRD_ETHERNET (typically). */
uint8_t hlen; /* ETH_ADDR_LEN (typically). */
uint8_t hops; /* Hop count; set to 0 by client. */
ovs_be32 xid; /* Transaction ID. */
ovs_be16 secs; /* Since client started address acquisition. */
ovs_be16 flags; /* DHCP_FLAGS_*. */
ovs_be32 ciaddr; /* Client IP, if it has a lease for one. */
ovs_be32 yiaddr; /* Client ("your") IP address. */
ovs_be32 siaddr; /* Next server IP address. */
ovs_be32 giaddr; /* Relay agent IP address. */
uint8_t chaddr[16]; /* Client hardware address. */
char sname[64]; /* Optional server host name. */
char file[128]; /* Boot file name. */
/* Followed by variable-length options field. */
};
BUILD_ASSERT_DECL(DHCP_HEADER_LEN == sizeof(struct dhcp_header));
#define DHCP_OP_REQUEST 1
#define DHCP_OP_REPLY 2
#define DHCP_MSG_DISCOVER 1
#define DHCP_MSG_OFFER 2
#define DHCP_MSG_REQUEST 3
#define DHCP_MSG_ACK 5
#define DHCP_OPT_MSG_TYPE 53
#define DHCP_OPT_END 255
#endif /* dhcp.h */
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