source: mainline/uspace/srv/net/dhcp/dhcp_std.h@ 053fc2b

/*
 * Copyright (c) 2013 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup dhcp
 * @{
 */
/**
 * @file
 * @brief DHCP standard definitions
 */

#ifndef DHCP_STD_H
#define DHCP_STD_H

#include <stdint.h>

enum {
        dhcp_server_port = 67,
        dhcp_client_port = 68
};

/** Fixed part of DHCP message */
typedef struct {
        /** Message op code */
        uint8_t op;
        /** Hardware address type */
        uint8_t htype;
        /** Hardware address length */
        uint8_t hlen;
        /** Hops */
        uint8_t hops;
        /** Transaction ID */
        uint32_t xid;
        /** Seconds elapsed since client began address acqusition or renewal */
        uint16_t secs;
        /** Flags */
        uint16_t flags;
        /** Client IP address */
        uint32_t ciaddr;
        /** Your (client) IP address */
        uint32_t yiaddr;
        /** IP address of next server */
        uint32_t siaddr;
        /** Relay agent IP address */
        uint32_t giaddr;
        /** Client hardware address */
        uint8_t chaddr[16];
        /** Server host name */
        uint8_t sname[64];
        /** Boot file name */
        uint8_t file[128];
        /** Magic cookie signalling the start of DHCP options */
        uint32_t opt_magic;
} dhcp_hdr_t;

/** Values for dhcp_hdr_t.op */
enum dhcp_op {
        op_bootrequest = 1,
        op_bootreply = 2
};

/** Values for dhcp_hdr_t.flags */
enum dhcp_flags {
        flag_broadcast = 0x80
};

/** Magic cookie signalling the start of DHCP options field */
enum {
        dhcp_opt_magic = (99 << 24) | (130 << 16) | (83 << 8) | 99
};

enum dhcp_option_code {
        /** Padding */
        opt_pad = 0,
        /** Subnet mask */
        opt_subnet_mask = 1,
        /** Router IP address */
        opt_router = 3,
        /** Domain name server */
        opt_dns_server = 6,
        /** Requested IP address */
        opt_req_ip_addr = 50,
        /** DHCP message type */
        opt_msg_type = 53,
        /** Server identifier */
        opt_server_id = 54,
        /** End */
        opt_end = 255
};

/** DHCP message type */
enum dhcp_msg_type {
        msg_dhcpdiscover = 1,
        msg_dhcpoffer = 2,
        msg_dhcprequest = 3,
        msg_dhcpdecline = 4,
        msg_dhcpack = 5,
        msg_dhcpnak = 6,
        msg_dhcprelease = 7
};

#endif

/** @}
 */