The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/net/if_bridgevar.h

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    1 /*      $NetBSD: if_bridgevar.h,v 1.11.46.1 2009/04/04 18:00:03 snj Exp $       */
    2 
    3 /*
    4  * Copyright 2001 Wasabi Systems, Inc.
    5  * All rights reserved.
    6  *
    7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed for the NetBSD Project by
   20  *      Wasabi Systems, Inc.
   21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
   22  *    or promote products derived from this software without specific prior
   23  *    written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35  * POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 /*
   39  * Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
   40  * All rights reserved.
   41  *
   42  * Redistribution and use in source and binary forms, with or without
   43  * modification, are permitted provided that the following conditions
   44  * are met:
   45  * 1. Redistributions of source code must retain the above copyright
   46  *    notice, this list of conditions and the following disclaimer.
   47  * 2. Redistributions in binary form must reproduce the above copyright
   48  *    notice, this list of conditions and the following disclaimer in the
   49  *    documentation and/or other materials provided with the distribution.
   50  * 3. All advertising materials mentioning features or use of this software
   51  *    must display the following acknowledgement:
   52  *      This product includes software developed by Jason L. Wright
   53  * 4. The name of the author may not be used to endorse or promote products
   54  *    derived from this software without specific prior written permission.
   55  *
   56  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   57  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   58  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   59  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
   60  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   61  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   62  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   63  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   64  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   65  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   66  * POSSIBILITY OF SUCH DAMAGE.
   67  *
   68  * OpenBSD: if_bridge.h,v 1.14 2001/03/22 03:48:29 jason Exp
   69  */
   70 
   71 /*
   72  * Data structure and control definitions for bridge interfaces.
   73  */
   74 
   75 #ifndef _NET_IF_BRIDGEVAR_H_
   76 #define _NET_IF_BRIDGEVAR_H_
   77 
   78 #include <sys/callout.h>
   79 #include <sys/queue.h>
   80 
   81 /*
   82  * Commands used in the SIOCSDRVSPEC ioctl.  Note the lookup of the
   83  * bridge interface itself is keyed off the ifdrv structure.
   84  */
   85 #define BRDGADD                 0       /* add bridge member (ifbreq) */
   86 #define BRDGDEL                 1       /* delete bridge member (ifbreq) */
   87 #define BRDGGIFFLGS             2       /* get member if flags (ifbreq) */
   88 #define BRDGSIFFLGS             3       /* set member if flags (ifbreq) */
   89 #define BRDGSCACHE              4       /* set cache size (ifbrparam) */
   90 #define BRDGGCACHE              5       /* get cache size (ifbrparam) */
   91 #define BRDGGIFS                6       /* get member list (ifbifconf) */
   92 #define BRDGRTS                 7       /* get address list (ifbaconf) */
   93 #define BRDGSADDR               8       /* set static address (ifbareq) */
   94 #define BRDGSTO                 9       /* set cache timeout (ifbrparam) */
   95 #define BRDGGTO                 10      /* get cache timeout (ifbrparam) */
   96 #define BRDGDADDR               11      /* delete address (ifbareq) */
   97 #define BRDGFLUSH               12      /* flush address cache (ifbreq) */
   98 
   99 #define BRDGGPRI                13      /* get priority (ifbrparam) */
  100 #define BRDGSPRI                14      /* set priority (ifbrparam) */
  101 #define BRDGGHT                 15      /* get hello time (ifbrparam) */
  102 #define BRDGSHT                 16      /* set hello time (ifbrparam) */
  103 #define BRDGGFD                 17      /* get forward delay (ifbrparam) */
  104 #define BRDGSFD                 18      /* set forward delay (ifbrparam) */
  105 #define BRDGGMA                 19      /* get max age (ifbrparam) */
  106 #define BRDGSMA                 20      /* set max age (ifbrparam) */
  107 #define BRDGSIFPRIO             21      /* set if priority (ifbreq) */
  108 #define BRDGSIFCOST             22      /* set if path cost (ifbreq) */
  109 #define BRDGGFILT               23      /* get filter flags (ifbrparam) */
  110 #define BRDGSFILT               24      /* set filter flags (ifbrparam) */
  111 
  112 /*
  113  * Generic bridge control request.
  114  */
  115 struct ifbreq {
  116         char            ifbr_ifsname[IFNAMSIZ]; /* member if name */
  117         uint32_t        ifbr_ifsflags;          /* member if flags */
  118         uint8_t         ifbr_state;             /* member if STP state */
  119         uint8_t         ifbr_priority;          /* member if STP priority */
  120         uint8_t         ifbr_path_cost;         /* member if STP cost */
  121         uint8_t         ifbr_portno;            /* member if port number */
  122 };
  123 
  124 /* BRDGGIFFLAGS, BRDGSIFFLAGS */
  125 #define IFBIF_LEARNING          0x01    /* if can learn */
  126 #define IFBIF_DISCOVER          0x02    /* if sends packets w/ unknown dest. */
  127 #define IFBIF_STP               0x04    /* if participates in spanning tree */
  128 
  129 #define IFBIFBITS       "\020\1LEARNING\2DISCOVER\3STP"
  130 
  131 /* BRDGFLUSH */
  132 #define IFBF_FLUSHDYN           0x00    /* flush learned addresses only */
  133 #define IFBF_FLUSHALL           0x01    /* flush all addresses */
  134 
  135 /* BRDGSFILT */
  136 #define IFBF_FILT_USEIPF        0x00000001 /* enable ipf on bridge */
  137 #define IFBF_FILT_MASK          0x00000001 /* mask of valid values */
  138 
  139 /* STP port states */
  140 #define BSTP_IFSTATE_DISABLED   0
  141 #define BSTP_IFSTATE_LISTENING  1
  142 #define BSTP_IFSTATE_LEARNING   2
  143 #define BSTP_IFSTATE_FORWARDING 3
  144 #define BSTP_IFSTATE_BLOCKING   4
  145 
  146 /*
  147  * Interface list structure.
  148  */
  149 struct ifbifconf {
  150         uint32_t        ifbic_len;      /* buffer size */
  151         union {
  152                 void *  ifbicu_buf;
  153                 struct ifbreq *ifbicu_req;
  154         } ifbic_ifbicu;
  155 #define ifbic_buf       ifbic_ifbicu.ifbicu_buf
  156 #define ifbic_req       ifbic_ifbicu.ifbicu_req
  157 };
  158 
  159 /*
  160  * Bridge address request.
  161  */
  162 struct ifbareq {
  163         char            ifba_ifsname[IFNAMSIZ]; /* member if name */
  164         unsigned long   ifba_expire;            /* address expire time */
  165         uint8_t         ifba_flags;             /* address flags */
  166         uint8_t         ifba_dst[ETHER_ADDR_LEN];/* destination address */
  167 };
  168 
  169 #define IFBAF_TYPEMASK  0x03    /* address type mask */
  170 #define IFBAF_DYNAMIC   0x00    /* dynamically learned address */
  171 #define IFBAF_STATIC    0x01    /* static address */
  172 
  173 #define IFBAFBITS       "\020\1STATIC"
  174 
  175 /*
  176  * Address list structure.
  177  */
  178 struct ifbaconf {
  179         uint32_t        ifbac_len;      /* buffer size */
  180         union {
  181                 void *ifbacu_buf;
  182                 struct ifbareq *ifbacu_req;
  183         } ifbac_ifbacu;
  184 #define ifbac_buf       ifbac_ifbacu.ifbacu_buf
  185 #define ifbac_req       ifbac_ifbacu.ifbacu_req
  186 };
  187 
  188 /*
  189  * Bridge parameter structure.
  190  */
  191 struct ifbrparam {
  192         union {
  193                 uint32_t ifbrpu_int32;
  194                 uint16_t ifbrpu_int16;
  195                 uint8_t ifbrpu_int8;
  196         } ifbrp_ifbrpu;
  197 };
  198 #define ifbrp_csize     ifbrp_ifbrpu.ifbrpu_int32       /* cache size */
  199 #define ifbrp_ctime     ifbrp_ifbrpu.ifbrpu_int32       /* cache time (sec) */
  200 #define ifbrp_prio      ifbrp_ifbrpu.ifbrpu_int16       /* bridge priority */
  201 #define ifbrp_hellotime ifbrp_ifbrpu.ifbrpu_int8        /* hello time (sec) */
  202 #define ifbrp_fwddelay  ifbrp_ifbrpu.ifbrpu_int8        /* fwd time (sec) */
  203 #define ifbrp_maxage    ifbrp_ifbrpu.ifbrpu_int8        /* max age (sec) */
  204 #define ifbrp_filter    ifbrp_ifbrpu.ifbrpu_int32       /* filtering flags */
  205 
  206 #ifdef _KERNEL
  207 /*
  208  * Timekeeping structure used in spanning tree code.
  209  */
  210 struct bridge_timer {
  211         uint16_t        active;
  212         uint16_t        value;
  213 };
  214 
  215 struct bstp_config_unit {
  216         uint64_t        cu_rootid;
  217         uint64_t        cu_bridge_id;
  218         uint32_t        cu_root_path_cost;
  219         uint16_t        cu_message_age;
  220         uint16_t        cu_max_age;
  221         uint16_t        cu_hello_time;
  222         uint16_t        cu_forward_delay;
  223         uint16_t        cu_port_id;
  224         uint8_t         cu_message_type;
  225         uint8_t         cu_topology_change_acknowledgment;
  226         uint8_t         cu_topology_change;
  227 };
  228 
  229 struct bstp_tcn_unit {
  230         uint8_t         tu_message_type;
  231 };
  232 
  233 /*
  234  * Bridge interface list entry.
  235  */
  236 struct bridge_iflist {
  237         LIST_ENTRY(bridge_iflist) bif_next;
  238         uint64_t                bif_designated_root;
  239         uint64_t                bif_designated_bridge;
  240         uint32_t                bif_path_cost;
  241         uint32_t                bif_designated_cost;
  242         struct bridge_timer     bif_hold_timer;
  243         struct bridge_timer     bif_message_age_timer;
  244         struct bridge_timer     bif_forward_delay_timer;
  245         uint16_t                bif_port_id;
  246         uint16_t                bif_designated_port;
  247         struct bstp_config_unit bif_config_bpdu;
  248         uint8_t                 bif_state;
  249         uint8_t                 bif_topology_change_acknowledge;
  250         uint8_t                 bif_config_pending;
  251         uint8_t                 bif_change_detection_enabled;
  252         uint8_t                 bif_priority;
  253         struct ifnet            *bif_ifp;       /* member if */
  254         uint32_t                bif_flags;      /* member if flags */
  255 };
  256 
  257 /*
  258  * Bridge route node.
  259  */
  260 struct bridge_rtnode {
  261         LIST_ENTRY(bridge_rtnode) brt_hash;     /* hash table linkage */
  262         LIST_ENTRY(bridge_rtnode) brt_list;     /* list linkage */
  263         struct ifnet            *brt_ifp;       /* destination if */
  264         unsigned long           brt_expire;     /* expiration time */
  265         uint8_t                 brt_flags;      /* address flags */
  266         uint8_t                 brt_addr[ETHER_ADDR_LEN];
  267 };
  268 
  269 /*
  270  * Software state for each bridge.
  271  */
  272 struct bridge_softc {
  273         struct ifnet            sc_if;
  274         LIST_ENTRY(bridge_softc) sc_list;
  275         uint64_t                sc_designated_root;
  276         uint64_t                sc_bridge_id;
  277         struct bridge_iflist    *sc_root_port;
  278         uint32_t                sc_root_path_cost;
  279         uint16_t                sc_max_age;
  280         uint16_t                sc_hello_time;
  281         uint16_t                sc_forward_delay;
  282         uint16_t                sc_bridge_max_age;
  283         uint16_t                sc_bridge_hello_time;
  284         uint16_t                sc_bridge_forward_delay;
  285         uint16_t                sc_topology_change_time;
  286         uint16_t                sc_hold_time;
  287         uint16_t                sc_bridge_priority;
  288         uint8_t                 sc_topology_change_detected;
  289         uint8_t                 sc_topology_change;
  290         struct bridge_timer     sc_hello_timer;
  291         struct bridge_timer     sc_topology_change_timer;
  292         struct bridge_timer     sc_tcn_timer;
  293         uint32_t                sc_brtmax;      /* max # of addresses */
  294         uint32_t                sc_brtcnt;      /* cur. # of addresses */
  295         uint32_t                sc_brttimeout;  /* rt timeout in seconds */
  296         callout_t               sc_brcallout;   /* bridge callout */
  297         callout_t               sc_bstpcallout; /* STP callout */
  298         LIST_HEAD(, bridge_iflist) sc_iflist;   /* member interface list */
  299         LIST_HEAD(, bridge_rtnode) *sc_rthash;  /* our forwarding table */
  300         LIST_HEAD(, bridge_rtnode) sc_rtlist;   /* list version of above */
  301         uint32_t                sc_rthash_key;  /* key for hash */
  302         uint32_t                sc_filter_flags; /* ipf and flags */
  303         void                    *sc_softintr;
  304 };
  305 
  306 extern const uint8_t bstp_etheraddr[];
  307 
  308 void    bridge_ifdetach(struct ifnet *);
  309 
  310 int     bridge_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
  311             struct rtentry *);
  312 struct mbuf *bridge_input(struct ifnet *, struct mbuf *);
  313 
  314 void    bstp_initialization(struct bridge_softc *);
  315 void    bstp_stop(struct bridge_softc *);
  316 struct mbuf *bstp_input(struct ifnet *, struct mbuf *);
  317 
  318 void    bridge_enqueue(struct bridge_softc *, struct ifnet *, struct mbuf *,
  319             int);
  320 
  321 #endif /* _KERNEL */
  322 #endif /* !_NET_IF_BRIDGEVAR_H_ */

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