bsd/netinet/dhcp.h

   1 #ifndef _NETINET_DHCP_H
   2 #define _NETINET_DHCP_H
   3 #include <sys/appleapiopts.h>
   4
   5 /*
   6  * Copyright (c) 1999-2007 Apple Inc. All rights reserved.
   7  *
   8  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   9  *
  10  * This file contains Original Code and/or Modifications of Original Code
  11  * as defined in and that are subject to the Apple Public Source License
  12  * Version 2.0 (the 'License'). You may not use this file except in
  13  * compliance with the License. The rights granted to you under the License
  14  * may not be used to create, or enable the creation or redistribution of,
  15  * unlawful or unlicensed copies of an Apple operating system, or to
  16  * circumvent, violate, or enable the circumvention or violation of, any
  17  * terms of an Apple operating system software license agreement.
  18  *
  19  * Please obtain a copy of the License at
  20  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  21  *
  22  * The Original Code and all software distributed under the License are
  23  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  24  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  25  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  27  * Please see the License for the specific language governing rights and
  28  * limitations under the License.
  29  *
  30  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  31  */
  32 /*
  33  * dhcp.h
  34  * - definitions for DHCP (as specified in RFC2132)
  35  */
  36 #include <sys/types.h>
  37 #include <netinet/in.h>
  38 #include <netinet/in_systm.h>
  39 #include <netinet/ip.h>
  40 #include <netinet/udp.h>
  41
  42 struct dhcp {
  43         u_char              dp_op;      /* packet opcode type */
  44         u_char              dp_htype;   /* hardware addr type */
  45         u_char              dp_hlen;    /* hardware addr length */
  46         u_char              dp_hops;    /* gateway hops */
  47         u_int32_t           dp_xid;     /* transaction ID */
  48         u_int16_t           dp_secs;    /* seconds since boot began */
  49         u_int16_t           dp_flags;   /* flags */
  50         struct in_addr      dp_ciaddr;  /* client IP address */
  51         struct in_addr      dp_yiaddr;  /* 'your' IP address */
  52         struct in_addr      dp_siaddr;  /* server IP address */
  53         struct in_addr      dp_giaddr;  /* gateway IP address */
  54         u_char              dp_chaddr[16];/* client hardware address */
  55         u_char              dp_sname[64];/* server host name */
  56         u_char              dp_file[128];/* boot file name */
  57         u_char              dp_options[0];/* variable-length options field */
  58 };
  59
  60 struct dhcp_packet {
  61         struct ip           ip;
  62         struct udphdr       udp;
  63         struct dhcp         dhcp;
  64 };
  65
  66 #define DHCP_OPTIONS_MIN        312
  67 #define DHCP_PACKET_MIN         (sizeof(struct dhcp_packet) + DHCP_OPTIONS_MIN)
  68 #define DHCP_PAYLOAD_MIN        (sizeof(struct dhcp) + DHCP_OPTIONS_MIN)
  69
  70 /* dhcp message types */
  71 #define DHCPDISCOVER    1
  72 #define DHCPOFFER       2
  73 #define DHCPREQUEST     3
  74 #define DHCPDECLINE     4
  75 #define DHCPACK         5
  76 #define DHCPNAK         6
  77 #define DHCPRELEASE     7
  78 #define DHCPINFORM      8
  79
  80 enum {
  81         dhcp_msgtype_none_e         = 0,
  82         dhcp_msgtype_discover_e     = DHCPDISCOVER,
  83         dhcp_msgtype_offer_e        = DHCPOFFER,
  84         dhcp_msgtype_request_e      = DHCPREQUEST,
  85         dhcp_msgtype_decline_e      = DHCPDECLINE,
  86         dhcp_msgtype_ack_e          = DHCPACK,
  87         dhcp_msgtype_nak_e          = DHCPNAK,
  88         dhcp_msgtype_release_e      = DHCPRELEASE,
  89         dhcp_msgtype_inform_e       = DHCPINFORM,
  90 };
  91
  92 typedef uint8_t dhcp_msgtype_t;
  93
  94 typedef int32_t                 dhcp_time_secs_t; /* absolute time */
  95 typedef int32_t                 dhcp_lease_t;     /* relative time */
  96 #define dhcp_time_hton          htonl
  97 #define dhcp_time_ntoh          ntohl
  98 #define dhcp_lease_hton         htonl
  99 #define dhcp_lease_ntoh         ntohl
 100
 101 #define DHCP_INFINITE_LEASE     ((dhcp_lease_t)-1)
 102 #define DHCP_INFINITE_TIME      ((dhcp_time_secs_t)-1)
 103
 104 #define DHCP_FLAGS_BROADCAST    ((u_int16_t)0x8000)
 105
 106 #endif /* _NETINET_DHCP_H */