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muxhandler.go
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muxhandler.go
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package debugproxy
import (
"bytes"
"io"
ios "github.com/danielpaulus/go-ios/ios"
log "github.com/sirupsen/logrus"
"howett.net/plist"
)
func proxyUsbMuxConnection(p *ProxyConnection, muxOnUnixSocket *ios.UsbMuxConnection, muxToDevice *ios.UsbMuxConnection) {
for {
request, err := muxOnUnixSocket.ReadMessage()
if err != nil {
muxOnUnixSocket.ReleaseDeviceConnection().Close()
muxToDevice.ReleaseDeviceConnection().Close()
if err == io.EOF {
p.LogClosed()
return
}
p.log.Info("Failed reading UsbMuxMessage", err)
return
}
var decodedRequest map[string]interface{}
decoder := plist.NewDecoder(bytes.NewReader(request.Payload))
err = decoder.Decode(&decodedRequest)
if err != nil {
p.log.Info("Failed decoding MuxMessage", request, err)
}
p.logJSONMessageToDevice(map[string]interface{}{"header": request.Header, "payload": decodedRequest, "type": "USBMUX"})
p.log.WithFields(log.Fields{"ID": p.id, "direction": "host->device"}).Trace(decodedRequest)
if decodedRequest["MessageType"] == "Connect" {
handleConnect(request, decodedRequest, p, muxOnUnixSocket, muxToDevice)
return
}
err = muxToDevice.SendMuxMessage(request)
if decodedRequest["MessageType"] == "ReadPairRecord" {
handleReadPairRecord(p, muxOnUnixSocket, muxToDevice)
continue
}
if err != nil {
p.log.Fatal("Failed forwarding message to device", request)
}
if decodedRequest["MessageType"] == "Listen" {
handleListen(p, muxOnUnixSocket, muxToDevice)
return
}
response, err := muxToDevice.ReadMessage()
var decodedResponse map[string]interface{}
decoder = plist.NewDecoder(bytes.NewReader(response.Payload))
err = decoder.Decode(&decodedResponse)
if err != nil {
p.log.Info("Failed decoding MuxMessage", decodedResponse, err)
}
p.logJSONMessageFromDevice(map[string]interface{}{"header": response.Header, "payload": decodedResponse, "type": "USBMUX"})
p.log.WithFields(log.Fields{"ID": p.id, "direction": "device->host"}).Trace(decodedResponse)
err = muxOnUnixSocket.SendMuxMessage(response)
}
}
func handleReadPairRecord(p *ProxyConnection, muxOnUnixSocket *ios.UsbMuxConnection, muxToDevice *ios.UsbMuxConnection) {
response, err := muxToDevice.ReadMessage()
var decodedResponse map[string]interface{}
decoder := plist.NewDecoder(bytes.NewReader(response.Payload))
err = decoder.Decode(&decodedResponse)
if err != nil {
p.log.Info("Failed decoding MuxMessage", decodedResponse, err)
}
pairRecord := ios.PairRecordfromBytes(decodedResponse["PairRecordData"].([]byte))
pairRecord.DeviceCertificate = pairRecord.HostCertificate
decodedResponse["PairRecordData"] = []byte(ios.ToPlist(pairRecord))
newPayload := []byte(ios.ToPlist(decodedResponse))
response.Payload = newPayload
response.Header.Length = uint32(len(newPayload) + 16)
p.logJSONMessageFromDevice(map[string]interface{}{"header": response.Header, "payload": decodedResponse, "type": "USBMUX"})
p.log.WithFields(log.Fields{"ID": p.id, "direction": "device->host"}).Trace(decodedResponse)
err = muxOnUnixSocket.SendMuxMessage(response)
}
func handleConnect(connectRequest ios.UsbMuxMessage, decodedConnectRequest map[string]interface{}, p *ProxyConnection, muxOnUnixSocket *ios.UsbMuxConnection, muxToDevice *ios.UsbMuxConnection) {
var port uint16
portFromPlist := decodedConnectRequest["PortNumber"]
switch portFromPlist.(type) {
case uint64:
port = uint16(portFromPlist.(uint64))
case int64:
port = uint16(portFromPlist.(int64))
}
if port == ios.Lockdownport {
p.log.Trace("Connect to Lockdown")
handleConnectToLockdown(connectRequest, decodedConnectRequest, p, muxOnUnixSocket, muxToDevice)
} else {
info, err := p.debugProxy.retrieveServiceInfoByPort(ios.Ntohs(uint16(port)))
if err != nil {
p.log.Fatalf("ServiceInfo for port: %d not found, this is a bug :-)reqheader: %+v repayload: %x", port, connectRequest.Header, connectRequest.Payload)
}
p.log.Infof("Connection to service '%s' detected on port %d", info.ServiceName, info.ServicePort)
handleConnectToService(connectRequest, decodedConnectRequest, p, muxOnUnixSocket, muxToDevice, info)
}
}
func handleConnectToLockdown(connectRequest ios.UsbMuxMessage, decodedConnectRequest map[string]interface{}, p *ProxyConnection, muxOnUnixSocket *ios.UsbMuxConnection, muxToDevice *ios.UsbMuxConnection) {
err := muxToDevice.SendMuxMessage(connectRequest)
if err != nil {
p.log.Fatal("Failed sending muxmessage to device")
}
connectResponse, err := muxToDevice.ReadMessage()
muxOnUnixSocket.SendMuxMessage(connectResponse)
lockdownToDevice := ios.NewLockDownConnection(muxToDevice.ReleaseDeviceConnection())
lockdownOnUnixSocket := ios.NewLockDownConnection(muxOnUnixSocket.ReleaseDeviceConnection())
proxyLockDownConnection(p, lockdownOnUnixSocket, lockdownToDevice)
}
func handleListen(p *ProxyConnection, muxOnUnixSocket *ios.UsbMuxConnection, muxToDevice *ios.UsbMuxConnection) {
go func() {
//use this to detect when the conn is closed. There shouldn't be any messages received ever.
_, err := muxOnUnixSocket.ReadMessage()
if err == io.EOF {
muxOnUnixSocket.ReleaseDeviceConnection().Close()
muxToDevice.ReleaseDeviceConnection().Close()
p.LogClosed()
return
}
p.log.WithFields(log.Fields{"error": err}).Error("Unexpected error on read for LISTEN connection")
}()
for {
response, err := muxToDevice.ReadMessage()
if err != nil {
//TODO: ugly, improve
d := muxOnUnixSocket.ReleaseDeviceConnection()
d1 := muxToDevice.ReleaseDeviceConnection()
if d != nil {
d.Close()
}
if d1 != nil {
d1.Close()
}
p.LogClosed()
return
}
var decodedResponse map[string]interface{}
decoder := plist.NewDecoder(bytes.NewReader(response.Payload))
err = decoder.Decode(&decodedResponse)
if err != nil {
p.log.Info("Failed decoding MuxMessage", decodedResponse, err)
}
p.logJSONMessageFromDevice(map[string]interface{}{"header": response.Header, "payload": decodedResponse, "type": "USBMUX"})
p.log.WithFields(log.Fields{"ID": p.id, "direction": "device->host"}).Trace(decodedResponse)
err = muxOnUnixSocket.SendMuxMessage(response)
}
}