Flow control for KISS interfaces, Transport Identity implemented
This commit is contained in:
Mark Qvist
parent
5c94324230
commit
eed78798f2
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@ -26,18 +26,6 @@ class Identity:
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# Storage
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known_destinations = {}
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def __init__(self,public_only=False):
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# Initialize keys to none
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self.prv = None
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self.pub = None
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self.prv_bytes = None
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self.pub_bytes = None
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self.hash = None
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self.hexhash = None
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if not public_only:
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self.createKeys()
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@staticmethod
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def remember(packet_hash, destination_hash, public_key, app_data = None):
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RNS.log("Remembering "+RNS.prettyhexrep(destination_hash), RNS.LOG_VERBOSE)
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@ -126,6 +114,27 @@ class Identity:
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Identity.saveKnownDestinations()
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@staticmethod
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def from_file(path):
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identity = Identity(public_only=True)
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if identity.load(path):
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return identity
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else:
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return None
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def __init__(self,public_only=False):
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# Initialize keys to none
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self.prv = None
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self.pub = None
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self.prv_bytes = None
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self.pub_bytes = None
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self.hash = None
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self.hexhash = None
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if not public_only:
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self.createKeys()
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def createKeys(self):
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self.prv = rsa.generate_private_key(
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public_exponent=65337,
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@ -145,7 +154,7 @@ class Identity:
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self.updateHashes()
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RNS.log("Identity keys created for "+RNS.prettyhexrep(self.hash), RNS.LOG_INFO)
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RNS.log("Identity keys created for "+RNS.prettyhexrep(self.hash), RNS.LOG_VERBOSE)
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def getPrivateKey(self):
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return self.prv_bytes
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@ -153,15 +162,27 @@ class Identity:
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def getPublicKey(self):
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return self.pub_bytes
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def loadPrivateKey(self, key):
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self.prv_bytes = key
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self.prv = serialization.load_der_private_key(self.prv_bytes, password=None,backend=default_backend())
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self.pub = self.prv.public_key()
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self.pub_bytes = self.pub.public_bytes(
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encoding=serialization.Encoding.DER,
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format=serialization.PublicFormat.SubjectPublicKeyInfo
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)
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self.updateHashes()
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def loadPrivateKey(self, prv_bytes):
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try:
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self.prv_bytes = prv_bytes
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self.prv = serialization.load_der_private_key(
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self.prv_bytes,
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password=None,
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backend=default_backend()
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)
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self.pub = self.prv.public_key()
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self.pub_bytes = self.pub.public_bytes(
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encoding=serialization.Encoding.DER,
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format=serialization.PublicFormat.SubjectPublicKeyInfo
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)
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self.updateHashes()
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return True
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except Exception as e:
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RNS.log("Failed to load identity key", RNS.LOG_ERROR)
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RNS.log("The contained exception was: "+str(e))
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return False
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def loadPublicKey(self, key):
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try:
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@ -175,11 +196,25 @@ class Identity:
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self.hash = Identity.truncatedHash(self.pub_bytes)
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self.hexhash = self.hash.encode("hex_codec")
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def saveIdentity(self):
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pass
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def save(self, path):
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try:
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with open(path, "w") as key_file:
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key_file.write(self.prv_bytes)
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return True
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return False
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except Exception as e:
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RNS.log("Error while saving identity to "+str(path), RNS.LOG_ERROR)
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RNS.log("The contained exception was: "+str(e))
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def loadIdentity(self):
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pass
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def load(self, path):
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try:
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with open(path, "r") as key_file:
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prv_bytes = key_file.read()
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return self.loadPrivateKey(prv_bytes)
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return False
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except Exception as e:
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RNS.log("Error while loading identity from "+str(path), RNS.LOG_ERROR)
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RNS.log("The contained exception was: "+str(e))
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def encrypt(self, plaintext):
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if self.pub != None:
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@ -280,3 +315,6 @@ class Identity:
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proof = RNS.Packet(destination, proof_data, RNS.Packet.PROOF)
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proof.send()
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def __str__(self):
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return RNS.prettyhexrep(self.hash)
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@ -8,19 +8,20 @@ import time
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import RNS
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class KISS():
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FEND = chr(0xC0)
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FESC = chr(0xDB)
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TFEND = chr(0xDC)
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TFESC = chr(0xDD)
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CMD_UNKNOWN = chr(0xFE)
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CMD_DATA = chr(0x00)
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CMD_TXDELAY = chr(0x01)
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CMD_P = chr(0x02)
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CMD_SLOTTIME = chr(0x03)
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CMD_TXTAIL = chr(0x04)
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CMD_FULLDUPLEX = chr(0x05)
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CMD_SETHARDWARE = chr(0x06)
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CMD_RETURN = chr(0xFF)
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FEND = chr(0xC0)
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FESC = chr(0xDB)
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TFEND = chr(0xDC)
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TFESC = chr(0xDD)
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CMD_UNKNOWN = chr(0xFE)
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CMD_DATA = chr(0x00)
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CMD_TXDELAY = chr(0x01)
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CMD_P = chr(0x02)
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CMD_SLOTTIME = chr(0x03)
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CMD_TXTAIL = chr(0x04)
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CMD_FULLDUPLEX = chr(0x05)
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CMD_SETHARDWARE = chr(0x06)
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CMD_READY = chr(0x0F)
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CMD_RETURN = chr(0xFF)
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class AX25():
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PID_NOLAYER3 = chr(0xF0)
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@ -39,7 +40,7 @@ class AX25KISSInterface(Interface):
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stopbits = None
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serial = None
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def __init__(self, owner, name, callsign, ssid, port, speed, databits, parity, stopbits, preamble, txtail, persistence, slottime):
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def __init__(self, owner, name, callsign, ssid, port, speed, databits, parity, stopbits, preamble, txtail, persistence, slottime, flow_control):
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self.serial = None
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self.owner = owner
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self.name = name
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@ -55,6 +56,10 @@ class AX25KISSInterface(Interface):
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self.timeout = 100
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self.online = False
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self.packet_queue = []
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self.flow_control = flow_control
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self.interface_ready = False
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if (len(self.src_call) < 3 or len(self.src_call) > 6):
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raise ValueError("Invalid callsign for "+str(self))
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@ -104,6 +109,8 @@ class AX25KISSInterface(Interface):
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self.setTxTail(self.txtail)
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self.setPersistence(self.persistence)
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self.setSlotTime(self.slottime)
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self.setFlowControl(self.flow_control)
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self.interface_ready = True
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RNS.log("AX.25 KISS interface configured")
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sleep(2)
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else:
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@ -160,6 +167,15 @@ class AX25KISSInterface(Interface):
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if written != len(kiss_command):
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raise IOError("Could not configure AX.25 KISS interface slot time to "+str(slottime_ms)+" (command value "+str(slottime)+")")
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def setFlowControl(self, flow_control):
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kiss_command = KISS.FEND+KISS.CMD_READY+chr(0x01)+KISS.FEND
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written = self.serial.write(kiss_command)
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if written != len(kiss_command):
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if (flow_control):
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raise IOError("Could not enable AX.25 KISS interface flow control")
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else:
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raise IOError("Could not enable AX.25 KISS interface flow control")
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def processIncoming(self, data):
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if (len(data) > 16):
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@ -168,37 +184,53 @@ class AX25KISSInterface(Interface):
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def processOutgoing(self,data):
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if self.online:
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# gen src/dst
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if self.interface_ready:
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if self.flow_control:
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self.interface_ready = False
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encoded_dst_ssid = 0x60 | (self.dst_ssid << 1)
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encoded_src_ssid = 0x60 | (self.src_ssid << 1) | 0x01
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encoded_dst_ssid = 0x60 | (self.dst_ssid << 1)
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encoded_src_ssid = 0x60 | (self.src_ssid << 1) | 0x01
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addr = ""
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addr = ""
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for i in range(0,6):
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if (i < len(self.dst_call)):
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addr += chr(ord(self.dst_call[i])<<1)
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else:
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addr += chr(0x20)
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addr += chr(encoded_dst_ssid)
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for i in range(0,6):
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if (i < len(self.dst_call)):
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addr += chr(ord(self.dst_call[i])<<1)
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else:
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addr += chr(0x20)
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addr += chr(encoded_dst_ssid)
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for i in range(0,6):
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if (i < len(self.src_call)):
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addr += chr(ord(self.src_call[i])<<1)
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else:
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addr += chr(0x20)
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addr += chr(encoded_src_ssid)
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for i in range(0,6):
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if (i < len(self.src_call)):
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addr += chr(ord(self.src_call[i])<<1)
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else:
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addr += chr(0x20)
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addr += chr(encoded_src_ssid)
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data = addr+AX25.CTRL_UI+AX25.PID_NOLAYER3+data
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data = addr+AX25.CTRL_UI+AX25.PID_NOLAYER3+data
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data = data.replace(chr(0xdb), chr(0xdb)+chr(0xdd))
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data = data.replace(chr(0xc0), chr(0xdb)+chr(0xdc))
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kiss_frame = chr(0xc0)+chr(0x00)+data+chr(0xc0)
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data = data.replace(chr(0xdb), chr(0xdb)+chr(0xdd))
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data = data.replace(chr(0xc0), chr(0xdb)+chr(0xdc))
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kiss_frame = chr(0xc0)+chr(0x00)+data+chr(0xc0)
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written = self.serial.write(kiss_frame)
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if written != len(kiss_frame):
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raise IOError("AX.25 interface only wrote "+str(written)+" bytes of "+str(len(kiss_frame)))
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written = self.serial.write(kiss_frame)
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if written != len(kiss_frame):
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if self.flow_control:
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self.interface_ready = True
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raise IOError("AX.25 interface only wrote "+str(written)+" bytes of "+str(len(kiss_frame)))
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else:
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self.queue(data)
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def queue(self, data):
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self.packet_queue.append(data)
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def process_queue(self):
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if len(self.packet_queue) > 0:
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data = self.packet_queue.pop(0)
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self.interface_ready = True
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self.processOutgoing(data)
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elif len(self.packet_queue) == 0:
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self.interface_ready = True
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def readLoop(self):
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try:
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@ -237,6 +269,10 @@ class AX25KISSInterface(Interface):
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byte = KISS.FESC
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escape = False
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data_buffer = data_buffer+byte
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elif (command == KISS.CMD_READY):
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# TODO: add timeout and reset if ready
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# command never arrives
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self.process_queue()
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else:
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time_since_last = int(time.time()*1000) - last_read_ms
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if len(data_buffer) > 0 and time_since_last > self.timeout:
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@ -20,6 +20,7 @@ class KISS():
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CMD_TXTAIL = chr(0x04)
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CMD_FULLDUPLEX = chr(0x05)
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CMD_SETHARDWARE = chr(0x06)
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CMD_READY = chr(0x0F)
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CMD_RETURN = chr(0xFF)
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class KISSInterface(Interface):
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@ -33,7 +34,7 @@ class KISSInterface(Interface):
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stopbits = None
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serial = None
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def __init__(self, owner, name, port, speed, databits, parity, stopbits, preamble, txtail, persistence, slottime):
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def __init__(self, owner, name, port, speed, databits, parity, stopbits, preamble, txtail, persistence, slottime, flow_control):
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self.serial = None
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self.owner = owner
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self.name = name
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@ -45,6 +46,10 @@ class KISSInterface(Interface):
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self.timeout = 100
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self.online = False
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self.packet_queue = []
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self.flow_control = flow_control
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self.interface_ready = False
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self.preamble = preamble if preamble != None else 350;
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self.txtail = txtail if txtail != None else 20;
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self.persistence = persistence if persistence != None else 64;
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@ -88,6 +93,8 @@ class KISSInterface(Interface):
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self.setTxTail(self.txtail)
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self.setPersistence(self.persistence)
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self.setSlotTime(self.slottime)
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self.setFlowControl(self.flow_control)
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self.interface_ready = True
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RNS.log("KISS interface configured")
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else:
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raise IOError("Could not open serial port")
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@ -144,6 +151,15 @@ class KISSInterface(Interface):
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if written != len(kiss_command):
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raise IOError("Could not configure KISS interface slot time to "+str(slottime_ms)+" (command value "+str(slottime)+")")
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def setFlowControl(self, flow_control):
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kiss_command = KISS.FEND+KISS.CMD_READY+chr(0x01)+KISS.FEND
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written = self.serial.write(kiss_command)
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if written != len(kiss_command):
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if (flow_control):
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raise IOError("Could not enable KISS interface flow control")
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else:
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raise IOError("Could not enable KISS interface flow control")
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def processIncoming(self, data):
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self.owner.inbound(data, self)
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@ -151,13 +167,30 @@ class KISSInterface(Interface):
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def processOutgoing(self,data):
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if self.online:
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data = data.replace(chr(0xdb), chr(0xdb)+chr(0xdd))
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data = data.replace(chr(0xc0), chr(0xdb)+chr(0xdc))
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frame = chr(0xc0)+chr(0x00)+data+chr(0xc0)
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written = self.serial.write(frame)
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if written != len(frame):
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raise IOError("Serial interface only wrote "+str(written)+" bytes of "+str(len(data)))
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if self.interface_ready:
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if self.flow_control:
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self.interface_ready = False
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data = data.replace(chr(0xdb), chr(0xdb)+chr(0xdd))
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data = data.replace(chr(0xc0), chr(0xdb)+chr(0xdc))
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frame = chr(0xc0)+chr(0x00)+data+chr(0xc0)
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written = self.serial.write(frame)
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if written != len(frame):
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raise IOError("Serial interface only wrote "+str(written)+" bytes of "+str(len(data)))
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else:
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self.queue(data)
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def queue(self, data):
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self.packet_queue.append(data)
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def process_queue(self):
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if len(self.packet_queue) > 0:
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data = self.packet_queue.pop(0)
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self.interface_ready = True
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self.processOutgoing(data)
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elif len(self.packet_queue) == 0:
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self.interface_ready = True
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def readLoop(self):
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try:
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@ -196,6 +229,10 @@ class KISSInterface(Interface):
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byte = KISS.FESC
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escape = False
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data_buffer = data_buffer+byte
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elif (command == KISS.CMD_READY):
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# TODO: add timeout and reset if ready
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# command never arrives
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self.process_queue()
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else:
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time_since_last = int(time.time()*1000) - last_read_ms
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if len(data_buffer) > 0 and time_since_last > self.timeout:
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@ -51,7 +51,7 @@ class Reticulum:
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RNS.Identity.loadKnownDestinations()
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Reticulum.router = self
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RNS.Transport.scheduleJobs()
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RNS.Transport.start()
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atexit.register(RNS.Identity.exitHandler)
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@ -141,6 +141,7 @@ class Reticulum:
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txtail = int(c["txtail"]) if "txtail" in c else None
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persistence = int(c["persistence"]) if "persistence" in c else None
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slottime = int(c["slottime"]) if "slottime" in c else None
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flow_control = (True if c["flow_control"] == "true" else False) if "flow_control" in c else False
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port = c["port"] if "port" in c else None
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speed = int(c["speed"]) if "speed" in c else 9600
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@ -162,7 +163,8 @@ class Reticulum:
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preamble,
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txtail,
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persistence,
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slottime
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slottime,
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flow_control
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)
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if "outgoing" in c and c["outgoing"].lower() == "true":
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@ -177,6 +179,7 @@ class Reticulum:
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txtail = int(c["txtail"]) if "txtail" in c else None
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persistence = int(c["persistence"]) if "persistence" in c else None
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slottime = int(c["slottime"]) if "slottime" in c else None
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flow_control = (True if c["flow_control"] == "true" else False) if "flow_control" in c else False
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port = c["port"] if "port" in c else None
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speed = int(c["speed"]) if "speed" in c else 9600
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@ -203,7 +206,8 @@ class Reticulum:
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preamble,
|
||||
txtail,
|
||||
persistence,
|
||||
slottime
|
||||
slottime,
|
||||
flow_control
|
||||
)
|
||||
|
||||
if "outgoing" in c and c["outgoing"].lower() == "true":
|
||||
|
|
|
|||
|
|
@ -26,12 +26,29 @@ class Transport:
|
|||
receipts_check_interval = 1.0
|
||||
hashlist_maxsize = 1000000
|
||||
|
||||
identity = None
|
||||
|
||||
@staticmethod
|
||||
def scheduleJobs():
|
||||
def start():
|
||||
if Transport.identity == None:
|
||||
transport_identity_path = RNS.Reticulum.configdir+"/transportidentity"
|
||||
if os.path.isfile(transport_identity_path):
|
||||
Transport.identity = RNS.Identity.from_file(transport_identity_path)
|
||||
|
||||
if Transport.identity == None:
|
||||
RNS.log("No valid Transport Identity on disk, creating...", RNS.LOG_VERBOSE)
|
||||
Transport.identity = RNS.Identity()
|
||||
Transport.identity.save(transport_identity_path)
|
||||
else:
|
||||
RNS.log("Loaded Transport Identity from disk", RNS.LOG_VERBOSE)
|
||||
|
||||
|
||||
thread = threading.Thread(target=Transport.jobloop)
|
||||
thread.setDaemon(True)
|
||||
thread.start()
|
||||
|
||||
RNS.log("Transport instance "+str(Transport.identity)+" started")
|
||||
|
||||
@staticmethod
|
||||
def jobloop():
|
||||
while (True):
|
||||
|
|
|
|||
Loading…
Reference in New Issue