bsd/netinet/bootp.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Bootstrap Protocol (BOOTP).  RFC 951.
  32  */
  33 /*
  34  * HISTORY
  35  *
  36  * 14 May 1992 ? at NeXT
  37  *      Added correct padding to struct nextvend.  This is
  38  *      needed for the i386 due to alignment differences wrt
  39  *      the m68k.  Also adjusted the size of the array fields
  40  *      because the NeXT vendor area was overflowing the bootp
  41  *      packet.
  42  */
  43
  44 #include <netinet/udp.h>
  45
  46 #define iaddr_t struct in_addr
  47
  48 struct bootp {
  49         u_char  bp_op;          /* packet opcode type */
  50 #define BOOTREQUEST     1
  51 #define BOOTREPLY       2
  52         u_char  bp_htype;       /* hardware addr type */
  53         u_char  bp_hlen;        /* hardware addr length */
  54         u_char  bp_hops;        /* gateway hops */
  55         u_long  bp_xid;         /* transaction ID */
  56         u_short bp_secs;        /* seconds since boot began */
  57         u_short bp_unused;
  58         iaddr_t bp_ciaddr;      /* client IP address */
  59         iaddr_t bp_yiaddr;      /* 'your' IP address */
  60         iaddr_t bp_siaddr;      /* server IP address */
  61         iaddr_t bp_giaddr;      /* gateway IP address */
  62         u_char  bp_chaddr[16];  /* client hardware address */
  63         u_char  bp_sname[64];   /* server host name */
  64         u_char  bp_file[128];   /* boot file name */
  65         u_char  bp_vend[64];    /* vendor-specific area */
  66 };
  67
  68 /*
  69  * UDP port numbers, server and client.
  70  */
  71 #define IPPORT_BOOTPS           67
  72 #define IPPORT_BOOTPC           68
  73
  74 /*
  75  * "vendor" data permitted for Stanford boot clients.
  76  */
  77 struct vend {
  78         u_char  v_magic[4];     /* magic number */
  79         u_long  v_flags;        /* flags/opcodes, etc. */
  80         u_char  v_unused[56];   /* currently unused */
  81 };
  82 #define VM_STANFORD     "STAN"  /* v_magic for Stanford */
  83
  84 /* v_flags values */
  85 #define VF_PCBOOT       1       /* an IBMPC or Mac wants environment info */
  86 #define VF_HELP         2       /* help me, I'm not registered */
  87
  88 #define NVMAXTEXT       55      /* don't change this, it just fits RFC951 */
  89 struct nextvend {
  90         u_char nv_magic[4];     /* Magic number for vendor specificity */
  91         u_char nv_version;      /* NeXT protocol version */
  92         /*
  93          * Round the beginning
  94          * of the union to a 16
  95          * bit boundary due to
  96          * struct/union alignment
  97          * on the m68k.
  98          */
  99         unsigned short  :0;
 100         union {
 101                 u_char NV0[58];
 102                 struct {
 103                         u_char NV1_opcode;      /* opcode - Version 1 */
 104                         u_char NV1_xid; /* transcation id */
 105                         u_char NV1_text[NVMAXTEXT];     /* text */
 106                         u_char NV1_null;        /* null terminator */
 107                 } NV1;
 108         } nv_U;
 109 };
 110 #define nv_unused       nv_U.NV0
 111 #define nv_opcode       nv_U.NV1.NV1_opcode
 112 #define nv_xid          nv_U.NV1.NV1_xid
 113 #define nv_text         nv_U.NV1.NV1_text
 114 #define nv_null         nv_U.NV1.NV1_null
 115
 116 /* Magic number */
 117 #define VM_NEXT         "NeXT"  /* v_magic for NeXT, Inc. */
 118
 119 /* Opcodes */
 120 #define BPOP_OK         0
 121 #define BPOP_QUERY      1
 122 #define BPOP_QUERY_NE   2
 123 #define BPOP_ERROR      3
 124
 125 struct bootp_packet {
 126     struct ip bp_ip;
 127     struct udphdr bp_udp;
 128     struct bootp bp_bootp;
 129 };
 130
 131 #define BOOTP_PKTSIZE (sizeof (struct bootp_packet))
 132
 133 /* backoffs must be masks */
 134 #define BOOTP_MIN_BACKOFF       0x7ff           /* 2.048 sec */
 135 #define BOOTP_MAX_BACKOFF       0xffff          /* 65.535 sec */
 136 #define BOOTP_RETRY             6               /* # retries */
 137