| 1 | /*
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| 2 | * Copyright (c) 2013 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup dhcp
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | * @brief DHCP standard definitions
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| 35 | */
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| 36 |
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| 37 | #ifndef DHCP_STD_H
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| 38 | #define DHCP_STD_H
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| 39 |
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| 40 | #include <stdint.h>
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| 41 |
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| 42 | enum {
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| 43 | dhcp_server_port = 67,
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| 44 | dhcp_client_port = 68
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| 45 | };
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| 46 |
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| 47 | /** Fixed part of DHCP message */
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| 48 | typedef struct {
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| 49 | /** Message op code */
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| 50 | uint8_t op;
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| 51 | /** Hardware address type */
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| 52 | uint8_t htype;
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| 53 | /** Hardware address length */
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| 54 | uint8_t hlen;
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| 55 | /** Hops */
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| 56 | uint8_t hops;
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| 57 | /** Transaction ID */
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| 58 | uint32_t xid;
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| 59 | /** Seconds elapsed since client began address acqusition or renewal */
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| 60 | uint16_t secs;
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| 61 | /** Flags */
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| 62 | uint16_t flags;
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| 63 | /** Client IP address */
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| 64 | uint32_t ciaddr;
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| 65 | /** Your (client) IP address */
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| 66 | uint32_t yiaddr;
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| 67 | /** IP address of next server */
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| 68 | uint32_t siaddr;
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| 69 | /** Relay agent IP address */
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| 70 | uint32_t giaddr;
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| 71 | /** Client hardware address */
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| 72 | uint8_t chaddr[16];
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| 73 | /** Server host name */
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| 74 | uint8_t sname[64];
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| 75 | /** Boot file name */
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| 76 | uint8_t file[128];
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| 77 | /** Magic cookie signalling the start of DHCP options */
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| 78 | uint32_t opt_magic;
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| 79 | } dhcp_hdr_t;
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| 80 |
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| 81 | /** Values for dhcp_hdr_t.op */
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| 82 | enum dhcp_op {
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| 83 | op_bootrequest = 1,
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| 84 | op_bootreply = 2
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| 85 | };
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| 86 |
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| 87 | /** Values for dhcp_hdr_t.flags */
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| 88 | enum dhcp_flags {
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| 89 | flag_broadcast = 0x80
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| 90 | };
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| 91 |
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| 92 | /** Magic cookie signalling the start of DHCP options field */
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| 93 | enum {
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| 94 | dhcp_opt_magic = (99 << 24) | (130 << 16) | (83 << 8) | 99
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| 95 | };
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| 96 |
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| 97 | enum dhcp_option_code {
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| 98 | /** Padding */
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| 99 | opt_pad = 0,
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| 100 | /** Subnet mask */
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| 101 | opt_subnet_mask = 1,
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| 102 | /** Router IP address */
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| 103 | opt_router = 3,
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| 104 | /** Domain name server */
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| 105 | opt_dns_server = 6,
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| 106 | /** Requested IP address */
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| 107 | opt_req_ip_addr = 50,
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| 108 | /** DHCP message type */
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| 109 | opt_msg_type = 53,
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| 110 | /** Server identifier */
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| 111 | opt_server_id = 54,
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| 112 | /** End */
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| 113 | opt_end = 255
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| 114 | };
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| 115 |
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| 116 | /** DHCP message type */
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| 117 | enum dhcp_msg_type {
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| 118 | msg_dhcpdiscover = 1,
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| 119 | msg_dhcpoffer = 2,
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| 120 | msg_dhcprequest = 3,
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| 121 | msg_dhcpdecline = 4,
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| 122 | msg_dhcpack = 5,
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| 123 | msg_dhcpnak = 6,
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| 124 | msg_dhcprelease = 7
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| 125 | };
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| 126 |
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| 127 | #endif
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| 128 |
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| 129 | /** @}
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| 130 | */
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