forked from Silverfish/proton-bridge
118 lines
3.3 KiB
Go
118 lines
3.3 KiB
Go
// Copyright (c) 2022 Proton AG
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//
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// This file is part of Proton Mail Bridge.
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//
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// Proton Mail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Proton Mail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package serverutil
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import (
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"crypto/tls"
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"fmt"
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"net"
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"github.com/ProtonMail/proton-bridge/v2/internal/events"
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"github.com/ProtonMail/proton-bridge/v2/pkg/listener"
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"github.com/sirupsen/logrus"
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)
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// Controller will make sure that server is listening and serving and if needed
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// users are disconnected.
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type Controller interface {
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ListenAndServe()
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Close()
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}
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// NewController return simple server controller.
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func NewController(s Server, l listener.Listener) Controller {
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log := logrus.WithField("pkg", "serverutil").WithField("protocol", s.Protocol())
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c := &controller{
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server: s,
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signals: l,
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log: log,
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closeDisconnectUsers: make(chan void),
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}
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if s.DebugServer() {
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fmt.Println("THE LOG WILL CONTAIN **DECRYPTED** MESSAGE DATA")
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log.Warning("================================================")
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log.Warning("THIS LOG WILL CONTAIN **DECRYPTED** MESSAGE DATA")
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log.Warning("================================================")
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}
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return c
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}
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type void struct{}
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type controller struct {
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server Server
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signals listener.Listener
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log *logrus.Entry
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closeDisconnectUsers chan void
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}
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func (c *controller) Close() {
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c.closeDisconnectUsers <- void{}
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if err := c.server.StopServe(); err != nil {
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c.log.WithError(err).Error("Issue when closing server")
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}
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}
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// ListenAndServe starts the server and keeps it on based on internet
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// availability. It also monitors and disconnect users if requested.
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func (c *controller) ListenAndServe() {
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go monitorDisconnectedUsers(c.server, c.signals, c.closeDisconnectUsers)
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defer c.server.HandlePanic()
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l := c.log.WithField("useSSL", c.server.UseSSL()).
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WithField("address", c.server.Address())
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var listener net.Listener
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var err error
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if c.server.UseSSL() {
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listener, err = tls.Listen("tcp", c.server.Address(), c.server.TLSConfig())
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} else {
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listener, err = net.Listen("tcp", c.server.Address())
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}
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if err != nil {
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l.WithError(err).Error("Cannot start listener.")
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c.signals.Emit(events.ErrorEvent, string(c.server.Protocol())+" failed: "+err.Error())
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return
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}
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// When starting the Bridge, we don't want to retry to notify user
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// quickly about the issue. Very probably retry will not help anyway.
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l.Info("Starting server")
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err = c.server.Serve(&connListener{listener, c.server})
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l.WithError(err).Debug("GoSMTP not serving")
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}
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func monitorDisconnectedUsers(s Server, l listener.Listener, done <-chan void) {
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ch := make(chan string)
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l.Add(events.CloseConnectionEvent, ch)
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for {
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select {
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case <-done:
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return
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case address := <-ch:
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s.DisconnectUser(address)
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}
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}
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}
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