1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * Linux ethernet bridge |
4 | * |
5 | * Authors: |
6 | * Lennert Buytenhek <buytenh@gnu.org> |
7 | */ |
8 | |
9 | #ifndef _BR_PRIVATE_STP_H |
10 | #define _BR_PRIVATE_STP_H |
11 | |
12 | #define BPDU_TYPE_CONFIG 0 |
13 | #define BPDU_TYPE_TCN 0x80 |
14 | |
15 | /* IEEE 802.1D-1998 timer values */ |
16 | #define BR_MIN_HELLO_TIME (1*HZ) |
17 | #define BR_MAX_HELLO_TIME (10*HZ) |
18 | |
19 | #define BR_MIN_FORWARD_DELAY (2*HZ) |
20 | #define BR_MAX_FORWARD_DELAY (30*HZ) |
21 | |
22 | #define BR_MIN_MAX_AGE (6*HZ) |
23 | #define BR_MAX_MAX_AGE (40*HZ) |
24 | |
25 | #define BR_MIN_PATH_COST 1 |
26 | #define BR_MAX_PATH_COST 65535 |
27 | |
28 | struct br_config_bpdu { |
29 | unsigned int topology_change:1; |
30 | unsigned int topology_change_ack:1; |
31 | bridge_id root; |
32 | int root_path_cost; |
33 | bridge_id bridge_id; |
34 | port_id port_id; |
35 | int message_age; |
36 | int max_age; |
37 | int hello_time; |
38 | int forward_delay; |
39 | }; |
40 | |
41 | /* called under bridge lock */ |
42 | static inline int br_is_designated_port(const struct net_bridge_port *p) |
43 | { |
44 | return !memcmp(p: &p->designated_bridge, q: &p->br->bridge_id, size: 8) && |
45 | (p->designated_port == p->port_id); |
46 | } |
47 | |
48 | |
49 | /* br_stp.c */ |
50 | void br_become_root_bridge(struct net_bridge *br); |
51 | void br_config_bpdu_generation(struct net_bridge *); |
52 | void br_configuration_update(struct net_bridge *); |
53 | void br_port_state_selection(struct net_bridge *); |
54 | void br_received_config_bpdu(struct net_bridge_port *p, |
55 | const struct br_config_bpdu *bpdu); |
56 | void br_received_tcn_bpdu(struct net_bridge_port *p); |
57 | void br_transmit_config(struct net_bridge_port *p); |
58 | void br_transmit_tcn(struct net_bridge *br); |
59 | void br_topology_change_detection(struct net_bridge *br); |
60 | void __br_set_topology_change(struct net_bridge *br, unsigned char val); |
61 | |
62 | /* br_stp_bpdu.c */ |
63 | void br_send_config_bpdu(struct net_bridge_port *, struct br_config_bpdu *); |
64 | void br_send_tcn_bpdu(struct net_bridge_port *); |
65 | |
66 | #endif |
67 | |