// A tid is 62 bits.
func createTID() uint64 {
buf := cryptonacl.Random(8)
// Clear the two most significant bits.
buf[7] &= 0x3f
return binary.LittleEndian.Uint64(buf)
}
func handleSyscall(conn *websocket.Conn, command map[string]interface{}) ([]byte, error) {
switch command["command"] {
case "advertise":
serviceName, ok := command["service"].(string)
if !ok {
return jsonError("service is required as a string")
}
reqid, ok := command["reqid"].(string)
if !ok {
return jsonError("reqid is required as a string")
}
service, err := mlt.Advertise(serviceName)
if err != nil {
return jsonError(err.Error())
}
services[serviceConn{service: serviceName, conn: conn}] = service
return json.Marshal(map[string]string{
"reqid": reqid,
})
case "import":
serviceName, ok := command["service"].(string)
if !ok {
return jsonError("service is required as a string")
}
reqid, ok := command["reqid"].(string)
if !ok {
return jsonError("reqid is required as a string")
}
service := services[serviceConn{service: serviceName, conn: conn}]
if service == nil {
return jsonError("No service by that name")
}
mltConn, err := service.Import()
if err != nil {
return jsonError(err.Error())
}
cid := strconv.FormatUint(binary.LittleEndian.Uint64(cryptonacl.Random(8)), 36)
connections[cid] = mltConn
return json.Marshal(map[string]interface{}{
"reqid": reqid,
"cid": cid,
})
case "ipc":
serviceName, ok := command["service"].(string)
if !ok {
return jsonError("service is required as a string")
}
address, ok := command["address"].(string)
if !ok {
return jsonError("address is required as a string")
}
reqid, ok := command["reqid"].(string)
if !ok {
return jsonError("reqid is required as a string")
}
mltConn, err := mlt.IPC(serviceName, address)
if err != nil {
return jsonError(err.Error())
}
cid := strconv.FormatUint(binary.LittleEndian.Uint64(cryptonacl.Random(8)), 36)
connections[cid] = mltConn
return json.Marshal(map[string]interface{}{
"reqid": reqid,
"cid": cid,
})
case "write":
cid, ok := command["cid"].(string)
if !ok {
return jsonError("cid is required as a string")
}
data, ok := command["data"].(string)
if !ok {
return jsonError("data is required as a string")
}
reqid, ok := command["reqid"].(string)
if !ok {
return jsonError("reqid is required as a string")
}
mltConn := connections[cid]
if mltConn == nil {
return jsonError("connection doesn't exist")
}
if _, err := mltConn.Write([]byte(data)); err != nil {
return jsonError(err.Error())
}
return json.Marshal(map[string]interface{}{
"reqid": reqid,
})
default:
return jsonError("Unknown command " + command["command"].(string))
}
}