net/bridge/br_private_stp.h

   1 /*
   2  *      Linux ethernet bridge
   3  *
   4  *      Authors:
   5  *      Lennert Buytenhek               <buytenh@gnu.org>
   6  *
   7  *      $Id: br_private_stp.h,v 1.3 2001/02/05 06:03:47 davem Exp $
   8  *
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License
  11  *      as published by the Free Software Foundation; either version
  12  *      2 of the License, or (at your option) any later version.
  13  */
  14
  15 #ifndef _BR_PRIVATE_STP_H
  16 #define _BR_PRIVATE_STP_H
  17
  18 #define BPDU_TYPE_CONFIG 0
  19 #define BPDU_TYPE_TCN 0x80
  20
  21 struct br_config_bpdu
  22 {
  23         unsigned        topology_change:1;
  24         unsigned        topology_change_ack:1;
  25         bridge_id       root;
  26         int             root_path_cost;
  27         bridge_id       bridge_id;
  28         port_id         port_id;
  29         int             message_age;
  30         int             max_age;
  31         int             hello_time;
  32         int             forward_delay;
  33 };
  34
  35 /* called under bridge lock */
  36 static inline int br_is_designated_port(const struct net_bridge_port *p)
  37 {
  38         return !memcmp(&p->designated_bridge, &p->br->bridge_id, 8) &&
  39                 (p->designated_port == p->port_id);
  40 }
  41
  42
  43 /* br_stp.c */
  44 extern void br_become_root_bridge(struct net_bridge *br);
  45 extern void br_config_bpdu_generation(struct net_bridge *);
  46 extern void br_configuration_update(struct net_bridge *);
  47 extern void br_port_state_selection(struct net_bridge *);
  48 extern void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu);
  49 extern void br_received_tcn_bpdu(struct net_bridge_port *p);
  50 extern void br_transmit_config(struct net_bridge_port *p);
  51 extern void br_transmit_tcn(struct net_bridge *br);
  52 extern void br_topology_change_detection(struct net_bridge *br);
  53
  54 /* br_stp_bpdu.c */
  55 extern void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *);
  56 extern void br_send_tcn_bpdu(struct net_bridge_port *);
  57
  58 #endif