95 lines
3.0 KiB
Go
95 lines
3.0 KiB
Go
/*
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* Copyright (C) 2014 struktur AG
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* http://www.strukturag.com
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is baeed on ideas from the chat example of gorilla/websocket.
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* Copyright 2013 Gary Burd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package main
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type hub struct {
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grabbers map[string]*grabber
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connections map[*connection]bool
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broadcast chan *interfacedata
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register chan *connection
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unregister chan *connection
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}
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var h = hub{
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broadcast: make(chan *interfacedata),
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register: make(chan *connection),
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unregister: make(chan *connection),
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connections: make(map[*connection]bool),
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grabbers: make(map[string]*grabber),
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}
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func (h *hub) run() {
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var eg *grabber
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var ok bool
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for {
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select {
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case c := <-h.register:
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h.connections[c] = true
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if eg, ok = h.grabbers[c.iface]; !ok {
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eg = newGrabber(c.iface)
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h.grabbers[c.iface] = eg
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}
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eg.start()
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case c := <-h.unregister:
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delete(h.connections, c)
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close(c.send)
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if eg, ok = h.grabbers[c.iface]; ok {
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eg.stop()
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}
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case d := <-h.broadcast:
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for c := range h.connections {
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if c.iface == d.iface {
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if m, err := d.encode(); err == nil {
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select {
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case c.send <- m:
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default:
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close(c.send)
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delete(h.connections, c)
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}
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}
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}
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}
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}
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}
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}
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