func handleSshConnection(sConn *ssh.ServerConn,
msgchan chan<- text.Message, addchan chan<- Client, rmchan chan<- net.Conn) {
defer sConn.Close()
for {
ch, err := sConn.Accept()
if err == io.EOF {
return
}
if err != nil {
log.Println("handleServerConn Accept:", err)
break
}
if ch.ChannelType() != "session" {
ch.Reject(ssh.UnknownChannelType, "unknown channel type")
break
}
log.Println("Client version:", string(sConn.ClientVersion))
// Create terminal
term := terminal.NewTerminal(ch, "")
serverTerm := &ssh.ServerTerminal{
Term: term,
Channel: ch,
}
ch.Accept()
go handleConnection(sConn, serverTerm, term, msgchan, addchan, rmchan)
}
}
func handleServerConn(sConn *ssh.ServerConn) {
defer sConn.Close()
for {
// Accept reads from the connection, demultiplexes packets
// to their corresponding channels and returns when a new
// channel request is seen. Some goroutine must always be
// calling Accept; otherwise no messages will be forwarded
// to the channels.
ch, err := sConn.Accept()
if err == io.EOF {
return
}
if err != nil {
log.Println("handleServerConn Accept:", err)
break
}
// Channels have a type, depending on the application level
// protocol intended. In the case of a shell, the type is
// "session" and ServerShell may be used to present a simple
// terminal interface.
if ch.ChannelType() != "session" {
ch.Reject(ssh.UnknownChannelType, "unknown channel type")
break
}
go handleChannel(ch)
}
}
func handleUser(sConn *ssh.ServerConn) {
if err := sConn.Handshake(); err != nil {
fmt.Printf("failed to handshake\n")
return
}
// A ServerConn multiplexes several channels, which must
// themselves be Accepted.
for {
// Accept reads from the connection, demultiplexes packets
// to their corresponding channels and returns when a new
// channel request is seen. Some goroutine must always be
// calling Accept; otherwise no messages will be forwarded
// to the channels.
channel, err := sConn.Accept()
if err != nil {
fmt.Printf("error from Accept\n")
return
}
// Channels have a type, depending on the application level
// protocol intended. In the case of a shell, the type is
// "session" and ServerShell may be used to present a simple
// terminal interface.
if channel.ChannelType() != "session" {
channel.Reject(ssh.UnknownChannelType, "unknown channel type")
continue
}
channel.Accept()
term := terminal.NewTerminal(channel, "> ")
serverTerm := &ssh.ServerTerminal{
Term: term,
Channel: channel,
}
go func() {
defer channel.Close()
for {
line, err := serverTerm.ReadLine()
if err != nil {
break
}
fmt.Println(line)
}
}()
}
}