bsd/netinet/bootp.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Bootstrap Protocol (BOOTP).  RFC 951.
  27  */
  28 /*
  29  * HISTORY
  30  *
  31  * 14 May 1992 ? at NeXT
  32  *      Added correct padding to struct nextvend.  This is
  33  *      needed for the i386 due to alignment differences wrt
  34  *      the m68k.  Also adjusted the size of the array fields
  35  *      because the NeXT vendor area was overflowing the bootp
  36  *      packet.
  37  */
  38
  39 #define iaddr_t struct in_addr
  40
  41 struct bootp {
  42         u_char  bp_op;          /* packet opcode type */
  43 #define BOOTREQUEST     1
  44 #define BOOTREPLY       2
  45         u_char  bp_htype;       /* hardware addr type */
  46         u_char  bp_hlen;        /* hardware addr length */
  47         u_char  bp_hops;        /* gateway hops */
  48         u_long  bp_xid;         /* transaction ID */
  49         u_short bp_secs;        /* seconds since boot began */
  50         u_short bp_unused;
  51         iaddr_t bp_ciaddr;      /* client IP address */
  52         iaddr_t bp_yiaddr;      /* 'your' IP address */
  53         iaddr_t bp_siaddr;      /* server IP address */
  54         iaddr_t bp_giaddr;      /* gateway IP address */
  55         u_char  bp_chaddr[16];  /* client hardware address */
  56         u_char  bp_sname[64];   /* server host name */
  57         u_char  bp_file[128];   /* boot file name */
  58         u_char  bp_vend[64];    /* vendor-specific area */
  59 };
  60
  61 /*
  62  * UDP port numbers, server and client.
  63  */
  64 #define IPPORT_BOOTPS           67
  65 #define IPPORT_BOOTPC           68
  66
  67 /*
  68  * "vendor" data permitted for Stanford boot clients.
  69  */
  70 struct vend {
  71         u_char  v_magic[4];     /* magic number */
  72         u_long  v_flags;        /* flags/opcodes, etc. */
  73         u_char  v_unused[56];   /* currently unused */
  74 };
  75 #define VM_STANFORD     "STAN"  /* v_magic for Stanford */
  76
  77 /* v_flags values */
  78 #define VF_PCBOOT       1       /* an IBMPC or Mac wants environment info */
  79 #define VF_HELP         2       /* help me, I'm not registered */
  80
  81 #define NVMAXTEXT       55      /* don't change this, it just fits RFC951 */
  82 struct nextvend {
  83         u_char nv_magic[4];     /* Magic number for vendor specificity */
  84         u_char nv_version;      /* NeXT protocol version */
  85         /*
  86          * Round the beginning
  87          * of the union to a 16
  88          * bit boundary due to
  89          * struct/union alignment
  90          * on the m68k.
  91          */
  92         unsigned short  :0;
  93         union {
  94                 u_char NV0[58];
  95                 struct {
  96                         u_char NV1_opcode;      /* opcode - Version 1 */
  97                         u_char NV1_xid; /* transcation id */
  98                         u_char NV1_text[NVMAXTEXT];     /* text */
  99                         u_char NV1_null;        /* null terminator */
 100                 } NV1;
 101         } nv_U;
 102 };
 103 #define nv_unused       nv_U.NV0
 104 #define nv_opcode       nv_U.NV1.NV1_opcode
 105 #define nv_xid          nv_U.NV1.NV1_xid
 106 #define nv_text         nv_U.NV1.NV1_text
 107 #define nv_null         nv_U.NV1.NV1_null
 108
 109 /* Magic number */
 110 #define VM_NEXT         "NeXT"  /* v_magic for NeXT, Inc. */
 111
 112 /* Opcodes */
 113 #define BPOP_OK         0
 114 #define BPOP_QUERY      1
 115 #define BPOP_QUERY_NE   2
 116 #define BPOP_ERROR      3
 117
 118 struct bootp_packet {
 119     struct ip bp_ip;
 120     struct udphdr bp_udp;
 121     struct bootp bp_bootp;
 122 };
 123
 124 #define BOOTP_PKTSIZE (sizeof (struct bootp_packet))
 125
 126 /* backoffs must be masks */
 127 #define BOOTP_MIN_BACKOFF       0x7ff           /* 2.048 sec */
 128 #define BOOTP_MAX_BACKOFF       0xffff          /* 65.535 sec */
 129 #define BOOTP_RETRY             6               /* # retries */
 130