bsd/netinet/bootp.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Bootstrap Protocol (BOOTP).  RFC 951.
  30  */
  31 /*
  32  * HISTORY
  33  *
  34  * 14 May 1992 ? at NeXT
  35  *      Added correct padding to struct nextvend.  This is
  36  *      needed for the i386 due to alignment differences wrt
  37  *      the m68k.  Also adjusted the size of the array fields
  38  *      because the NeXT vendor area was overflowing the bootp
  39  *      packet.
  40  */
  41
  42 #include <netinet/udp.h>
  43
  44 #define iaddr_t struct in_addr
  45
  46 struct bootp {
  47         u_char  bp_op;          /* packet opcode type */
  48 #define BOOTREQUEST     1
  49 #define BOOTREPLY       2
  50         u_char  bp_htype;       /* hardware addr type */
  51         u_char  bp_hlen;        /* hardware addr length */
  52         u_char  bp_hops;        /* gateway hops */
  53         u_int32_t bp_xid;       /* transaction ID */
  54         u_short bp_secs;        /* seconds since boot began */
  55         u_short bp_unused;
  56         iaddr_t bp_ciaddr;      /* client IP address */
  57         iaddr_t bp_yiaddr;      /* 'your' IP address */
  58         iaddr_t bp_siaddr;      /* server IP address */
  59         iaddr_t bp_giaddr;      /* gateway IP address */
  60         u_char  bp_chaddr[16];  /* client hardware address */
  61         u_char  bp_sname[64];   /* server host name */
  62         u_char  bp_file[128];   /* boot file name */
  63         u_char  bp_vend[64];    /* vendor-specific area */
  64 };
  65
  66 /*
  67  * UDP port numbers, server and client.
  68  */
  69 #define IPPORT_BOOTPS           67
  70 #define IPPORT_BOOTPC           68
  71
  72 /*
  73  * "vendor" data permitted for Stanford boot clients.
  74  */
  75 struct vend {
  76         u_char  v_magic[4];     /* magic number */
  77         u_int32_t v_flags;      /* flags/opcodes, etc. */
  78         u_char  v_unused[56];   /* currently unused */
  79 };
  80 #define VM_STANFORD     "STAN"  /* v_magic for Stanford */
  81
  82 /* v_flags values */
  83 #define VF_PCBOOT       1       /* an IBMPC or Mac wants environment info */
  84 #define VF_HELP         2       /* help me, I'm not registered */
  85
  86 #define NVMAXTEXT       55      /* don't change this, it just fits RFC951 */
  87 struct nextvend {
  88         u_char nv_magic[4];     /* Magic number for vendor specificity */
  89         u_char nv_version;      /* NeXT protocol version */
  90         /*
  91          * Round the beginning
  92          * of the union to a 16
  93          * bit boundary due to
  94          * struct/union alignment
  95          * on the m68k.
  96          */
  97         unsigned short  :0;
  98         union {
  99                 u_char NV0[58];
 100                 struct {
 101                         u_char NV1_opcode;      /* opcode - Version 1 */
 102                         u_char NV1_xid; /* transcation id */
 103                         u_char NV1_text[NVMAXTEXT];     /* text */
 104                         u_char NV1_null;        /* null terminator */
 105                 } NV1;
 106         } nv_U;
 107 };
 108 #define nv_unused       nv_U.NV0
 109 #define nv_opcode       nv_U.NV1.NV1_opcode
 110 #define nv_xid          nv_U.NV1.NV1_xid
 111 #define nv_text         nv_U.NV1.NV1_text
 112 #define nv_null         nv_U.NV1.NV1_null
 113
 114 /* Magic number */
 115 #define VM_NEXT         "NeXT"  /* v_magic for NeXT, Inc. */
 116
 117 /* Opcodes */
 118 #define BPOP_OK         0
 119 #define BPOP_QUERY      1
 120 #define BPOP_QUERY_NE   2
 121 #define BPOP_ERROR      3
 122
 123 struct bootp_packet {
 124         struct ip bp_ip;
 125         struct udphdr bp_udp;
 126         struct bootp bp_bootp;
 127 };
 128
 129 #define BOOTP_PKTSIZE (sizeof (struct bootp_packet))
 130
 131 /* backoffs must be masks */
 132 #define BOOTP_MIN_BACKOFF       0x7ff           /* 2.048 sec */
 133 #define BOOTP_MAX_BACKOFF       0xffff          /* 65.535 sec */
 134 #define BOOTP_RETRY             6               /* # retries */