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Annotation of kernel/bsd/netinet/bootp.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
                      7:  * Reserved.  This file contains Original Code and/or Modifications of
                      8:  * Original Code as defined in and that are subject to the Apple Public
                      9:  * Source License Version 1.1 (the "License").  You may not use this file
                     10:  * except in compliance with the License.  Please obtain a copy of the
                     11:  * License at http://www.apple.com/publicsource and read it before using
                     12:  * this file.
                     13:  * 
                     14:  * The Original Code and all software distributed under the License are
                     15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     19:  * License for the specific language governing rights and limitations
                     20:  * under the License.
                     21:  * 
                     22:  * @APPLE_LICENSE_HEADER_END@
                     23:  */
                     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: 

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