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Annotation of XNU/bsd/netinet/bootp.h, revision 1.1

1.1     ! root        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: 

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