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Annotation of kernel/bsd/netinet/ip_mroute.h, revision 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: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            26: /*
        !            27:  * Copyright (c) 1989 Stephen Deering.
        !            28:  * Copyright (c) 1992, 1993
        !            29:  *     The Regents of the University of California.  All rights reserved.
        !            30:  *
        !            31:  * This code is derived from software contributed to Berkeley by
        !            32:  * Stephen Deering of Stanford University.
        !            33:  *
        !            34:  * Redistribution and use in source and binary forms, with or without
        !            35:  * modification, are permitted provided that the following conditions
        !            36:  * are met:
        !            37:  * 1. Redistributions of source code must retain the above copyright
        !            38:  *    notice, this list of conditions and the following disclaimer.
        !            39:  * 2. Redistributions in binary form must reproduce the above copyright
        !            40:  *    notice, this list of conditions and the following disclaimer in the
        !            41:  *    documentation and/or other materials provided with the distribution.
        !            42:  * 3. All advertising materials mentioning features or use of this software
        !            43:  *    must display the following acknowledgement:
        !            44:  *     This product includes software developed by the University of
        !            45:  *     California, Berkeley and its contributors.
        !            46:  * 4. Neither the name of the University nor the names of its contributors
        !            47:  *    may be used to endorse or promote products derived from this software
        !            48:  *    without specific prior written permission.
        !            49:  *
        !            50:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            51:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            52:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            53:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            54:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            55:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            56:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            57:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            58:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            59:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            60:  * SUCH DAMAGE.
        !            61:  *
        !            62:  *     @(#)ip_mroute.h 8.2 (Berkeley) 4/28/95
        !            63:  */
        !            64: 
        !            65: /*
        !            66:  * Definitions for the kernel part of DVMRP,
        !            67:  * a Distance-Vector Multicast Routing Protocol.
        !            68:  * (See RFC-1075.)
        !            69:  *
        !            70:  * Written by David Waitzman, BBN Labs, August 1988.
        !            71:  * Modified by Steve Deering, Stanford, February 1989.
        !            72:  *
        !            73:  * MROUTING 1.0
        !            74:  */
        !            75: 
        !            76: 
        !            77: /*
        !            78:  * DVMRP-specific setsockopt commands.
        !            79:  */
        !            80: #define        DVMRP_INIT      100
        !            81: #define        DVMRP_DONE      101
        !            82: #define        DVMRP_ADD_VIF   102
        !            83: #define        DVMRP_DEL_VIF   103
        !            84: #define        DVMRP_ADD_LGRP  104
        !            85: #define        DVMRP_DEL_LGRP  105
        !            86: #define        DVMRP_ADD_MRT   106
        !            87: #define        DVMRP_DEL_MRT   107
        !            88: 
        !            89: 
        !            90: /*
        !            91:  * Types and macros for handling bitmaps with one bit per virtual interface.
        !            92:  */
        !            93: #define        MAXVIFS 32
        !            94: typedef u_long vifbitmap_t;
        !            95: typedef u_short vifi_t;                /* type of a vif index */
        !            96: 
        !            97: #define        VIFM_SET(n, m)          ((m) |= (1 << (n)))
        !            98: #define        VIFM_CLR(n, m)          ((m) &= ~(1 << (n)))
        !            99: #define        VIFM_ISSET(n, m)        ((m) & (1 << (n)))
        !           100: #define        VIFM_CLRALL(m)          ((m) = 0x00000000)
        !           101: #define        VIFM_COPY(mfrom, mto)   ((mto) = (mfrom))
        !           102: #define        VIFM_SAME(m1, m2)       ((m1) == (m2))
        !           103: 
        !           104: 
        !           105: /*
        !           106:  * Agument structure for DVMRP_ADD_VIF.
        !           107:  * (DVMRP_DEL_VIF takes a single vifi_t argument.)
        !           108:  */
        !           109: struct vifctl {
        !           110:        vifi_t      vifc_vifi;          /* the index of the vif to be added */
        !           111:        u_char      vifc_flags;         /* VIFF_ flags defined below */
        !           112:        u_char      vifc_threshold;     /* min ttl required to forward on vif */
        !           113:        struct  in_addr vifc_lcl_addr;  /* local interface address */
        !           114:        struct  in_addr vifc_rmt_addr;  /* remote address (tunnels only) */
        !           115: };
        !           116: 
        !           117: #define        VIFF_TUNNEL     0x1             /* vif represents a tunnel end-point */
        !           118: 
        !           119: 
        !           120: /*
        !           121:  * Argument structure for DVMRP_ADD_LGRP and DVMRP_DEL_LGRP.
        !           122:  */
        !           123: struct lgrplctl {
        !           124:        vifi_t  lgc_vifi;
        !           125:        struct  in_addr lgc_gaddr;
        !           126: };
        !           127: 
        !           128: 
        !           129: /*
        !           130:  * Argument structure for DVMRP_ADD_MRT.
        !           131:  * (DVMRP_DEL_MRT takes a single struct in_addr argument, containing origin.)
        !           132:  */
        !           133: struct mrtctl {
        !           134:        struct  in_addr mrtc_origin;    /* subnet origin of multicasts */
        !           135:        struct  in_addr mrtc_originmask; /* subnet mask for origin */
        !           136:        vifi_t  mrtc_parent;            /* incoming vif */
        !           137:        vifbitmap_t mrtc_children;      /* outgoing children vifs */
        !           138:        vifbitmap_t mrtc_leaves;        /* subset of outgoing children vifs */
        !           139: };
        !           140: 
        !           141: 
        !           142: #ifdef _KERNEL
        !           143: 
        !           144: /*
        !           145:  * The kernel's virtual-interface structure.
        !           146:  */
        !           147: struct vif {
        !           148:        u_char  v_flags;                /* VIFF_ flags defined above */
        !           149:        u_char  v_threshold;            /* min ttl required to forward on vif */
        !           150:        struct  in_addr v_lcl_addr;     /* local interface address */
        !           151:        struct  in_addr v_rmt_addr;     /* remote address (tunnels only) */
        !           152:        struct  ifnet  *v_ifp;          /* pointer to interface */
        !           153:        struct  in_addr *v_lcl_grps;    /* list of local grps (phyints only) */
        !           154:        int     v_lcl_grps_max;         /* malloc'ed number of v_lcl_grps */
        !           155:        int     v_lcl_grps_n;           /* used number of v_lcl_grps */
        !           156:        u_long  v_cached_group;         /* last grp looked-up (phyints only) */
        !           157:        int     v_cached_result;        /* last look-up result (phyints only) */
        !           158: };
        !           159: 
        !           160: /*
        !           161:  * The kernel's multicast route structure.
        !           162:  */
        !           163: struct mrt {
        !           164:        struct  in_addr mrt_origin;     /* subnet origin of multicasts */
        !           165:        struct  in_addr mrt_originmask; /* subnet mask for origin */
        !           166:        vifi_t  mrt_parent;             /* incoming vif */
        !           167:        vifbitmap_t mrt_children;       /* outgoing children vifs */
        !           168:        vifbitmap_t mrt_leaves;         /* subset of outgoing children vifs */
        !           169:        struct  mrt *mrt_next;          /* forward link */
        !           170: };
        !           171: 
        !           172: 
        !           173: #define        MRTHASHSIZ      64
        !           174: #if (MRTHASHSIZ & (MRTHASHSIZ - 1)) == 0         /* from sys:route.h */
        !           175: #define        MRTHASHMOD(h)   ((h) & (MRTHASHSIZ - 1))
        !           176: #else
        !           177: #define        MRTHASHMOD(h)   ((h) % MRTHASHSIZ)
        !           178: #endif
        !           179: 
        !           180: /*
        !           181:  * The kernel's multicast routing statistics.
        !           182:  */
        !           183: struct mrtstat {
        !           184:        u_long  mrts_mrt_lookups;       /* # multicast route lookups */
        !           185:        u_long  mrts_mrt_misses;        /* # multicast route cache misses */
        !           186:        u_long  mrts_grp_lookups;       /* # group address lookups */
        !           187:        u_long  mrts_grp_misses;        /* # group address cache misses */
        !           188:        u_long  mrts_no_route;          /* no route for packet's origin */
        !           189:        u_long  mrts_bad_tunnel;        /* malformed tunnel options */
        !           190:        u_long  mrts_cant_tunnel;       /* no room for tunnel options */
        !           191:        u_long  mrts_wrong_if;          /* arrived on the wrong interface */
        !           192: };
        !           193: 
        !           194: 
        !           195: int    ip_mrouter_cmd __P((int, struct socket *, struct mbuf *));
        !           196: int    ip_mrouter_done __P((void));
        !           197: #endif /* _KERNEL */

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