bsd/netinet/bootp.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Bootstrap Protocol (BOOTP).  RFC 951.
  24  */
  25 /*
  26  * HISTORY
  27  *
  28  * 14 May 1992 ? at NeXT
  29  *      Added correct padding to struct nextvend.  This is
  30  *      needed for the i386 due to alignment differences wrt
  31  *      the m68k.  Also adjusted the size of the array fields
  32  *      because the NeXT vendor area was overflowing the bootp
  33  *      packet.
  34  */
  35
  36 #define iaddr_t struct in_addr
  37
  38 struct bootp {
  39         u_char  bp_op;          /* packet opcode type */
  40 #define BOOTREQUEST     1
  41 #define BOOTREPLY       2
  42         u_char  bp_htype;       /* hardware addr type */
  43         u_char  bp_hlen;        /* hardware addr length */
  44         u_char  bp_hops;        /* gateway hops */
  45         u_long  bp_xid;         /* transaction ID */
  46         u_short bp_secs;        /* seconds since boot began */
  47         u_short bp_unused;
  48         iaddr_t bp_ciaddr;      /* client IP address */
  49         iaddr_t bp_yiaddr;      /* 'your' IP address */
  50         iaddr_t bp_siaddr;      /* server IP address */
  51         iaddr_t bp_giaddr;      /* gateway IP address */
  52         u_char  bp_chaddr[16];  /* client hardware address */
  53         u_char  bp_sname[64];   /* server host name */
  54         u_char  bp_file[128];   /* boot file name */
  55         u_char  bp_vend[64];    /* vendor-specific area */
  56 };
  57
  58 /*
  59  * UDP port numbers, server and client.
  60  */
  61 #define IPPORT_BOOTPS           67
  62 #define IPPORT_BOOTPC           68
  63
  64 /*
  65  * "vendor" data permitted for Stanford boot clients.
  66  */
  67 struct vend {
  68         u_char  v_magic[4];     /* magic number */
  69         u_long  v_flags;        /* flags/opcodes, etc. */
  70         u_char  v_unused[56];   /* currently unused */
  71 };
  72 #define VM_STANFORD     "STAN"  /* v_magic for Stanford */
  73
  74 /* v_flags values */
  75 #define VF_PCBOOT       1       /* an IBMPC or Mac wants environment info */
  76 #define VF_HELP         2       /* help me, I'm not registered */
  77
  78 #define NVMAXTEXT       55      /* don't change this, it just fits RFC951 */
  79 struct nextvend {
  80         u_char nv_magic[4];     /* Magic number for vendor specificity */
  81         u_char nv_version;      /* NeXT protocol version */
  82         /*
  83          * Round the beginning
  84          * of the union to a 16
  85          * bit boundary due to
  86          * struct/union alignment
  87          * on the m68k.
  88          */
  89         unsigned short  :0;
  90         union {
  91                 u_char NV0[58];
  92                 struct {
  93                         u_char NV1_opcode;      /* opcode - Version 1 */
  94                         u_char NV1_xid; /* transcation id */
  95                         u_char NV1_text[NVMAXTEXT];     /* text */
  96                         u_char NV1_null;        /* null terminator */
  97                 } NV1;
  98         } nv_U;
  99 };
 100 #define nv_unused       nv_U.NV0
 101 #define nv_opcode       nv_U.NV1.NV1_opcode
 102 #define nv_xid          nv_U.NV1.NV1_xid
 103 #define nv_text         nv_U.NV1.NV1_text
 104 #define nv_null         nv_U.NV1.NV1_null
 105
 106 /* Magic number */
 107 #define VM_NEXT         "NeXT"  /* v_magic for NeXT, Inc. */
 108
 109 /* Opcodes */
 110 #define BPOP_OK         0
 111 #define BPOP_QUERY      1
 112 #define BPOP_QUERY_NE   2
 113 #define BPOP_ERROR      3
 114
 115 struct bootp_packet {
 116     struct ip bp_ip;
 117     struct udphdr bp_udp;
 118     struct bootp bp_bootp;
 119 };
 120
 121 #define BOOTP_PKTSIZE (sizeof (struct bootp_packet))
 122
 123 /* backoffs must be masks */
 124 #define BOOTP_MIN_BACKOFF       0x7ff           /* 2.048 sec */
 125 #define BOOTP_MAX_BACKOFF       0xffff          /* 65.535 sec */
 126 #define BOOTP_RETRY             6               /* # retries */
 127