bsd/netinet/dhcp.h

   1
   2 #ifndef _NETINET_DHCP_H
   3 #define _NETINET_DHCP_H
   4 #include <sys/appleapiopts.h>
   5
   6 /*
   7  * Copyright (c) 1999-2007 Apple Inc. All rights reserved.
   8  *
   9  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  10  *
  11  * This file contains Original Code and/or Modifications of Original Code
  12  * as defined in and that are subject to the Apple Public Source License
  13  * Version 2.0 (the 'License'). You may not use this file except in
  14  * compliance with the License. The rights granted to you under the License
  15  * may not be used to create, or enable the creation or redistribution of,
  16  * unlawful or unlicensed copies of an Apple operating system, or to
  17  * circumvent, violate, or enable the circumvention or violation of, any
  18  * terms of an Apple operating system software license agreement.
  19  *
  20  * Please obtain a copy of the License at
  21  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  22  *
  23  * The Original Code and all software distributed under the License are
  24  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  25  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  26  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  27  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  28  * Please see the License for the specific language governing rights and
  29  * limitations under the License.
  30  *
  31  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  32  */
  33 /*
  34  * dhcp.h
  35  * - definitions for DHCP (as specified in RFC2132)
  36  */
  37 #include <sys/types.h>
  38 #include <netinet/in.h>
  39 #include <netinet/in_systm.h>
  40 #include <netinet/ip.h>
  41 #include <netinet/udp.h>
  42
  43 struct dhcp {
  44     u_char              dp_op;          /* packet opcode type */
  45     u_char              dp_htype;       /* hardware addr type */
  46     u_char              dp_hlen;        /* hardware addr length */
  47     u_char              dp_hops;        /* gateway hops */
  48     u_int32_t           dp_xid;         /* transaction ID */
  49     u_int16_t           dp_secs;        /* seconds since boot began */
  50     u_int16_t           dp_flags;       /* flags */
  51     struct in_addr      dp_ciaddr;      /* client IP address */
  52     struct in_addr      dp_yiaddr;      /* 'your' IP address */
  53     struct in_addr      dp_siaddr;      /* server IP address */
  54     struct in_addr      dp_giaddr;      /* gateway IP address */
  55     u_char              dp_chaddr[16];  /* client hardware address */
  56     u_char              dp_sname[64];   /* server host name */
  57     u_char              dp_file[128];   /* boot file name */
  58     u_char              dp_options[0];  /* variable-length options field */
  59 };
  60
  61 struct dhcp_packet {
  62     struct ip           ip;
  63     struct udphdr       udp;
  64     struct dhcp         dhcp;
  65 };
  66
  67 #define DHCP_OPTIONS_MIN        312
  68 #define DHCP_PACKET_MIN         (sizeof(struct dhcp_packet) + DHCP_OPTIONS_MIN)
  69 #define DHCP_PAYLOAD_MIN        (sizeof(struct dhcp) + DHCP_OPTIONS_MIN)
  70
  71 /* dhcp message types */
  72 #define DHCPDISCOVER    1
  73 #define DHCPOFFER       2
  74 #define DHCPREQUEST     3
  75 #define DHCPDECLINE     4
  76 #define DHCPACK         5
  77 #define DHCPNAK         6
  78 #define DHCPRELEASE     7
  79 #define DHCPINFORM      8
  80
  81 enum {
  82     dhcp_msgtype_none_e         = 0,
  83     dhcp_msgtype_discover_e     = DHCPDISCOVER,
  84     dhcp_msgtype_offer_e        = DHCPOFFER,
  85     dhcp_msgtype_request_e      = DHCPREQUEST,
  86     dhcp_msgtype_decline_e      = DHCPDECLINE,
  87     dhcp_msgtype_ack_e          = DHCPACK,
  88     dhcp_msgtype_nak_e          = DHCPNAK,
  89     dhcp_msgtype_release_e      = DHCPRELEASE,
  90     dhcp_msgtype_inform_e       = DHCPINFORM,
  91 };
  92
  93 typedef uint8_t dhcp_msgtype_t;
  94
  95 typedef int32_t                 dhcp_time_secs_t; /* absolute time */
  96 typedef int32_t                 dhcp_lease_t;     /* relative time */
  97 #define dhcp_time_hton          htonl
  98 #define dhcp_time_ntoh          ntohl
  99 #define dhcp_lease_hton         htonl
 100 #define dhcp_lease_ntoh         ntohl
 101
 102 #define DHCP_INFINITE_LEASE     ((dhcp_lease_t)-1)
 103 #define DHCP_INFINITE_TIME      ((dhcp_time_secs_t)-1)
 104
 105 #define DHCP_FLAGS_BROADCAST    ((u_short)0x0001)
 106
 107 #endif /* _NETINET_DHCP_H */