| 1 | /* |
| 2 | * net/tipc/bcast.h: Include file for TIPC broadcast code |
| 3 | * |
| 4 | * Copyright (c) 2003-2006, 2014-2015, Ericsson AB |
| 5 | * Copyright (c) 2005, 2010-2011, Wind River Systems |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the names of the copyright holders nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * Alternatively, this software may be distributed under the terms of the |
| 21 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 22 | * Software Foundation. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
| 37 | #ifndef _TIPC_BCAST_H |
| 38 | #define _TIPC_BCAST_H |
| 39 | |
| 40 | #include "core.h" |
| 41 | |
| 42 | struct tipc_node; |
| 43 | struct tipc_msg; |
| 44 | struct tipc_nl_msg; |
| 45 | struct tipc_nlist; |
| 46 | struct tipc_nitem; |
| 47 | extern const char tipc_bclink_name[]; |
| 48 | |
| 49 | #define TIPC_METHOD_EXPIRE msecs_to_jiffies(5000) |
| 50 | |
| 51 | #define BCLINK_MODE_BCAST 0x1 |
| 52 | #define BCLINK_MODE_RCAST 0x2 |
| 53 | #define BCLINK_MODE_SEL 0x4 |
| 54 | |
| 55 | struct tipc_nlist { |
| 56 | struct list_head list; |
| 57 | u32 self; |
| 58 | u16 remote; |
| 59 | bool local; |
| 60 | }; |
| 61 | |
| 62 | void tipc_nlist_init(struct tipc_nlist *nl, u32 self); |
| 63 | void tipc_nlist_purge(struct tipc_nlist *nl); |
| 64 | void tipc_nlist_add(struct tipc_nlist *nl, u32 node); |
| 65 | void tipc_nlist_del(struct tipc_nlist *nl, u32 node); |
| 66 | |
| 67 | /* Cookie to be used between socket and broadcast layer |
| 68 | * @rcast: replicast (instead of broadcast) was used at previous xmit |
| 69 | * @mandatory: broadcast/replicast indication was set by user |
| 70 | * @deferredq: defer queue to make message in order |
| 71 | * @expires: re-evaluate non-mandatory transmit method if we are past this |
| 72 | */ |
| 73 | struct tipc_mc_method { |
| 74 | bool rcast; |
| 75 | bool mandatory; |
| 76 | struct sk_buff_head deferredq; |
| 77 | unsigned long expires; |
| 78 | }; |
| 79 | |
| 80 | int tipc_bcast_init(struct net *net); |
| 81 | void tipc_bcast_stop(struct net *net); |
| 82 | void tipc_bcast_add_peer(struct net *net, struct tipc_link *l, |
| 83 | struct sk_buff_head *xmitq); |
| 84 | void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_bcl); |
| 85 | void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id); |
| 86 | void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id); |
| 87 | int tipc_bcast_get_mtu(struct net *net); |
| 88 | void tipc_bcast_disable_rcast(struct net *net); |
| 89 | int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts, |
| 90 | struct tipc_mc_method *method, struct tipc_nlist *dests, |
| 91 | u16 *cong_link_cnt); |
| 92 | int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb); |
| 93 | void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, |
| 94 | struct tipc_msg *hdr); |
| 95 | int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l, |
| 96 | struct tipc_msg *hdr); |
| 97 | int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg); |
| 98 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]); |
| 99 | int tipc_bclink_reset_stats(struct net *net); |
| 100 | |
| 101 | u32 tipc_bcast_get_broadcast_mode(struct net *net); |
| 102 | u32 tipc_bcast_get_broadcast_ratio(struct net *net); |
| 103 | |
| 104 | void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq, |
| 105 | struct sk_buff_head *inputq); |
| 106 | |
| 107 | static inline void tipc_bcast_lock(struct net *net) |
| 108 | { |
| 109 | spin_lock_bh(&tipc_net(net)->bclock); |
| 110 | } |
| 111 | |
| 112 | static inline void tipc_bcast_unlock(struct net *net) |
| 113 | { |
| 114 | spin_unlock_bh(&tipc_net(net)->bclock); |
| 115 | } |
| 116 | |
| 117 | static inline struct tipc_link *tipc_bc_sndlink(struct net *net) |
| 118 | { |
| 119 | return tipc_net(net)->bcl; |
| 120 | } |
| 121 | |
| 122 | #endif |