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Annotation of 43BSDReno/sys/netinet/in.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986, 1990 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)in.h        7.10 (Berkeley) 6/28/90
        !            21:  */
        !            22: 
        !            23: /*
        !            24:  * Constants and structures defined by the internet system,
        !            25:  * Per RFC 790, September 1981.
        !            26:  */
        !            27: 
        !            28: /*
        !            29:  * Protocols
        !            30:  */
        !            31: #define        IPPROTO_IP              0               /* dummy for IP */
        !            32: #define        IPPROTO_ICMP            1               /* control message protocol */
        !            33: #define        IPPROTO_GGP             3               /* gateway^2 (deprecated) */
        !            34: #define        IPPROTO_TCP             6               /* tcp */
        !            35: #define        IPPROTO_EGP             8               /* exterior gateway protocol */
        !            36: #define        IPPROTO_PUP             12              /* pup */
        !            37: #define        IPPROTO_UDP             17              /* user datagram protocol */
        !            38: #define        IPPROTO_IDP             22              /* xns idp */
        !            39: #define        IPPROTO_TP              29              /* tp-4 w/ class negotiation */
        !            40: #define        IPPROTO_EON             80              /* ISO cnlp */
        !            41: 
        !            42: #define        IPPROTO_RAW             255             /* raw IP packet */
        !            43: #define        IPPROTO_MAX             256
        !            44: 
        !            45: 
        !            46: /*
        !            47:  * Local port number conventions:
        !            48:  * Ports < IPPORT_RESERVED are reserved for
        !            49:  * privileged processes (e.g. root).
        !            50:  * Ports > IPPORT_USERRESERVED are reserved
        !            51:  * for servers, not necessarily privileged.
        !            52:  */
        !            53: #define        IPPORT_RESERVED         1024
        !            54: #define        IPPORT_USERRESERVED     5000
        !            55: 
        !            56: /*
        !            57:  * Internet address (a structure for historical reasons)
        !            58:  */
        !            59: struct in_addr {
        !            60:        u_long s_addr;
        !            61: };
        !            62: 
        !            63: /*
        !            64:  * Definitions of bits in internet address integers.
        !            65:  * On subnets, the decomposition of addresses to host and net parts
        !            66:  * is done according to subnet mask, not the masks here.
        !            67:  */
        !            68: #define        IN_CLASSA(i)            (((long)(i) & 0x80000000) == 0)
        !            69: #define        IN_CLASSA_NET           0xff000000
        !            70: #define        IN_CLASSA_NSHIFT        24
        !            71: #define        IN_CLASSA_HOST          0x00ffffff
        !            72: #define        IN_CLASSA_MAX           128
        !            73: 
        !            74: #define        IN_CLASSB(i)            (((long)(i) & 0xc0000000) == 0x80000000)
        !            75: #define        IN_CLASSB_NET           0xffff0000
        !            76: #define        IN_CLASSB_NSHIFT        16
        !            77: #define        IN_CLASSB_HOST          0x0000ffff
        !            78: #define        IN_CLASSB_MAX           65536
        !            79: 
        !            80: #define        IN_CLASSC(i)            (((long)(i) & 0xe0000000) == 0xc0000000)
        !            81: #define        IN_CLASSC_NET           0xffffff00
        !            82: #define        IN_CLASSC_NSHIFT        8
        !            83: #define        IN_CLASSC_HOST          0x000000ff
        !            84: 
        !            85: #define        IN_CLASSD(i)            (((long)(i) & 0xf0000000) == 0xe0000000)
        !            86: #define        IN_MULTICAST(i)         IN_CLASSD(i)
        !            87: 
        !            88: #define        IN_EXPERIMENTAL(i)      (((long)(i) & 0xe0000000) == 0xe0000000)
        !            89: #define        IN_BADCLASS(i)          (((long)(i) & 0xf0000000) == 0xf0000000)
        !            90: 
        !            91: #define        INADDR_ANY              (u_long)0x00000000
        !            92: #define        INADDR_BROADCAST        (u_long)0xffffffff      /* must be masked */
        !            93: #ifndef KERNEL
        !            94: #define        INADDR_NONE             0xffffffff              /* -1 return */
        !            95: #endif
        !            96: 
        !            97: #define        IN_LOOPBACKNET          127                     /* official! */
        !            98: 
        !            99: /*
        !           100:  * Socket address, internet style.
        !           101:  */
        !           102: struct sockaddr_in {
        !           103:        u_char  sin_len;
        !           104:        u_char  sin_family;
        !           105:        u_short sin_port;
        !           106:        struct  in_addr sin_addr;
        !           107:        char    sin_zero[8];
        !           108: };
        !           109: 
        !           110: /*
        !           111:  * Structure used to describe IP options.
        !           112:  * Used to store options internally, to pass them to a process,
        !           113:  * or to restore options retrieved earlier.
        !           114:  * The ip_dst is used for the first-hop gateway when using a source route
        !           115:  * (this gets put into the header proper).
        !           116:  */
        !           117: struct ip_opts {
        !           118:        struct  in_addr ip_dst;         /* first hop, 0 w/o src rt */
        !           119:        char    ip_opts[40];            /* actually variable in size */
        !           120: };
        !           121: 
        !           122: /*
        !           123:  * Options for use with [gs]etsockopt at the IP level.
        !           124:  * First word of comment is data type; bool is stored in int.
        !           125:  */
        !           126: #define        IP_OPTIONS      1       /* buf/ip_opts; set/get IP per-packet options */
        !           127: #define        IP_HDRINCL      2       /* int; header is included with data (raw) */
        !           128: #define        IP_TOS          3       /* int; IP type of service and precedence */
        !           129: #define        IP_TTL          4       /* int; IP time to live */
        !           130: #define        IP_RECVOPTS     5       /* bool; receive all IP options w/datagram */
        !           131: #define        IP_RECVRETOPTS  6       /* bool; receive IP options for response */
        !           132: #define        IP_RECVDSTADDR  7       /* bool; receive IP dst addr w/datagram */
        !           133: #define        IP_RETOPTS      8       /* ip_opts; set/get IP per-packet options */
        !           134: 
        !           135: #ifdef KERNEL
        !           136: extern struct domain inetdomain;
        !           137: extern struct protosw inetsw[];
        !           138: struct in_addr in_makeaddr();
        !           139: u_long in_netof(), in_lnaof();
        !           140: #endif

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