[BRIDGE]: use kcalloc
[linux-2.6.git] / 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