- switch msg := decode(packet).(type) {
- case *channelOpenMsg:
- c.getChan(msg.PeersId).msg <- msg
- case *channelOpenConfirmMsg:
- c.getChan(msg.PeersId).msg <- msg
- case *channelOpenFailureMsg:
- c.getChan(msg.PeersId).msg <- msg
- case *channelCloseMsg:
- ch := c.getChan(msg.PeersId)
- close(ch.win)
- close(ch.data)
- close(ch.dataExt)
- c.chanlist.remove(msg.PeersId)
- case *channelEOFMsg:
- c.getChan(msg.PeersId).msg <- msg
- case *channelRequestSuccessMsg:
- c.getChan(msg.PeersId).msg <- msg
- case *channelRequestFailureMsg:
- c.getChan(msg.PeersId).msg <- msg
- case *channelRequestMsg:
- c.getChan(msg.PeersId).msg <- msg
- case *windowAdjustMsg:
- c.getChan(msg.PeersId).win <- int(msg.AdditionalBytes)
- case *channelData:
- c.getChan(msg.PeersId).data <- msg.Payload
- case *channelExtendedData:
- // RFC 4254 5.2 defines data_type_code 1 to be data destined
- // for stderr on interactive sessions. Other data types are
- // silently discarded.
- if msg.Datatype == 1 {
- c.getChan(msg.PeersId).dataExt <- msg.Payload
+ switch packet[0] {
+ case msgChannelData:
+ if len(packet) < 9 {
+ // malformed data packet
+ break
+ }
+ peersId := uint32(packet[1])<<24 | uint32(packet[2])<<16 | uint32(packet[3])<<8 | uint32(packet[4])
+ if length := int(packet[5])<<24 | int(packet[6])<<16 | int(packet[7])<<8 | int(packet[8]); length > 0 {
+ packet = packet[9:]
+ c.getChan(peersId).data <- packet[:length]
+ }
+ case msgChannelExtendedData:
+ if len(packet) < 13 {
+ // malformed data packet
+ break
+ }
+ peersId := uint32(packet[1])<<24 | uint32(packet[2])<<16 | uint32(packet[3])<<8 | uint32(packet[4])
+ datatype := uint32(packet[5])<<24 | uint32(packet[6])<<16 | uint32(packet[7])<<8 | uint32(packet[8])
+ if length := int(packet[9])<<24 | int(packet[10])<<16 | int(packet[11])<<8 | int(packet[12]); length > 0 {
+ packet = packet[13:]
+ // RFC 4254 5.2 defines data_type_code 1 to be data destined
+ // for stderr on interactive sessions. Other data types are
+ // silently discarded.
+ if datatype == 1 {
+ c.getChan(peersId).dataExt <- packet[:length]
+ }