2016-06-03 17:02:02 +00:00
|
|
|
import struct
|
2020-04-28 18:50:57 +00:00
|
|
|
import math
|
2018-03-20 11:32:41 +00:00
|
|
|
import time
|
2018-04-04 12:14:22 +00:00
|
|
|
import RNS
|
2016-06-03 17:02:02 +00:00
|
|
|
|
|
|
|
class Packet:
|
2018-04-25 10:23:56 +00:00
|
|
|
# Packet types
|
|
|
|
DATA = 0x00 # Data packets
|
|
|
|
ANNOUNCE = 0x01 # Announces
|
|
|
|
LINKREQUEST = 0x02 # Link requests
|
|
|
|
PROOF = 0x03 # Proofs
|
2018-04-16 20:09:23 +00:00
|
|
|
types = [DATA, ANNOUNCE, LINKREQUEST, PROOF]
|
2016-06-03 17:02:02 +00:00
|
|
|
|
2018-04-25 10:23:56 +00:00
|
|
|
# Header types
|
2018-04-18 21:31:17 +00:00
|
|
|
HEADER_1 = 0x00 # Normal header format
|
2020-03-01 15:56:49 +00:00
|
|
|
HEADER_2 = 0x01 # Header format used for packets in transport
|
2018-04-18 21:31:17 +00:00
|
|
|
HEADER_3 = 0x02 # Reserved
|
|
|
|
HEADER_4 = 0x03 # Reserved
|
2018-03-19 15:39:08 +00:00
|
|
|
header_types = [HEADER_1, HEADER_2, HEADER_3, HEADER_4]
|
2016-06-03 17:02:02 +00:00
|
|
|
|
2018-04-25 20:08:17 +00:00
|
|
|
# Data packet context types
|
2018-04-25 10:23:56 +00:00
|
|
|
NONE = 0x00 # Generic data packet
|
|
|
|
RESOURCE = 0x01 # Packet is part of a resource
|
|
|
|
RESOURCE_ADV = 0x02 # Packet is a resource advertisement
|
|
|
|
RESOURCE_REQ = 0x03 # Packet is a resource part request
|
|
|
|
RESOURCE_HMU = 0x04 # Packet is a resource hashmap update
|
|
|
|
RESOURCE_PRF = 0x05 # Packet is a resource proof
|
|
|
|
RESOURCE_ICL = 0x06 # Packet is a resource initiator cancel message
|
|
|
|
RESOURCE_RCL = 0x07 # Packet is a resource receiver cancel message
|
|
|
|
CACHE_REQUEST = 0x08 # Packet is a cache request
|
|
|
|
REQUEST = 0x09 # Packet is a request
|
|
|
|
RESPONSE = 0x0A # Packet is a response to a request
|
2020-03-06 11:55:05 +00:00
|
|
|
PATH_RESPONSE = 0x0B # Packet is a response to a path request
|
|
|
|
COMMAND = 0x0C # Packet is a command
|
|
|
|
COMMAND_STATUS = 0x0D # Packet is a status of an executed command
|
2018-04-25 20:08:17 +00:00
|
|
|
KEEPALIVE = 0xFB # Packet is a keepalive packet
|
|
|
|
LINKCLOSE = 0xFC # Packet is a link close message
|
|
|
|
LINKPROOF = 0xFD # Packet is a link packet proof
|
2018-04-25 10:23:56 +00:00
|
|
|
LRRTT = 0xFE # Packet is a link request round-trip time measurement
|
|
|
|
LRPROOF = 0xFF # Packet is a link request proof
|
2018-04-18 21:31:17 +00:00
|
|
|
|
2018-04-25 10:23:56 +00:00
|
|
|
# This is used to calculate allowable
|
|
|
|
# payload sizes
|
2020-04-28 18:50:57 +00:00
|
|
|
HEADER_MAXSIZE = 23
|
|
|
|
MDU = RNS.Reticulum.MDU
|
|
|
|
|
|
|
|
# With an MTU of 500, the maximum RSA-encrypted
|
|
|
|
# amount of data we can send in a single packet
|
|
|
|
# is given by the below calculation; 258 bytes.
|
|
|
|
RSA_MDU = math.floor(MDU/RNS.Identity.DECRYPT_CHUNKSIZE)*RNS.Identity.ENCRYPT_CHUNKSIZE
|
|
|
|
PLAIN_MDU = MDU
|
2018-04-18 21:31:17 +00:00
|
|
|
|
2018-04-25 10:23:56 +00:00
|
|
|
# TODO: This should be calculated
|
|
|
|
# more intelligently
|
|
|
|
# Default packet timeout
|
2018-04-18 21:31:17 +00:00
|
|
|
TIMEOUT = 60
|
2018-04-17 15:46:48 +00:00
|
|
|
|
2020-03-06 21:45:05 +00:00
|
|
|
def __init__(self, destination, data, packet_type = DATA, context = NONE, transport_type = RNS.Transport.BROADCAST, header_type = HEADER_1, transport_id = None, attached_interface = None):
|
2018-03-19 15:39:08 +00:00
|
|
|
if destination != None:
|
|
|
|
if transport_type == None:
|
2018-04-04 12:14:22 +00:00
|
|
|
transport_type = RNS.Transport.BROADCAST
|
2016-06-03 17:02:02 +00:00
|
|
|
|
2018-03-19 15:39:08 +00:00
|
|
|
self.header_type = header_type
|
|
|
|
self.packet_type = packet_type
|
|
|
|
self.transport_type = transport_type
|
2018-04-18 21:31:17 +00:00
|
|
|
self.context = context
|
2016-06-03 17:02:02 +00:00
|
|
|
|
2018-03-19 15:39:08 +00:00
|
|
|
self.hops = 0;
|
|
|
|
self.destination = destination
|
|
|
|
self.transport_id = transport_id
|
|
|
|
self.data = data
|
|
|
|
self.flags = self.getPackedFlags()
|
|
|
|
|
|
|
|
self.raw = None
|
|
|
|
self.packed = False
|
|
|
|
self.sent = False
|
2018-04-17 15:46:48 +00:00
|
|
|
self.receipt = None
|
2018-03-20 11:32:41 +00:00
|
|
|
self.fromPacked = False
|
2018-03-19 15:39:08 +00:00
|
|
|
else:
|
2018-03-20 11:32:41 +00:00
|
|
|
self.raw = data
|
|
|
|
self.packed = True
|
|
|
|
self.fromPacked = True
|
|
|
|
|
2019-11-09 22:47:42 +00:00
|
|
|
self.MTU = RNS.Reticulum.MTU
|
|
|
|
self.sent_at = None
|
2018-03-20 11:32:41 +00:00
|
|
|
self.packet_hash = None
|
2018-03-19 15:39:08 +00:00
|
|
|
|
2020-03-06 21:45:05 +00:00
|
|
|
self.attached_interface = attached_interface
|
|
|
|
|
2018-03-19 15:39:08 +00:00
|
|
|
def getPackedFlags(self):
|
2018-04-18 21:31:17 +00:00
|
|
|
if self.context == Packet.LRPROOF:
|
2018-04-16 15:13:39 +00:00
|
|
|
packed_flags = (self.header_type << 6) | (self.transport_type << 4) | RNS.Destination.LINK | self.packet_type
|
|
|
|
else:
|
|
|
|
packed_flags = (self.header_type << 6) | (self.transport_type << 4) | (self.destination.type << 2) | self.packet_type
|
2018-03-19 15:39:08 +00:00
|
|
|
return packed_flags
|
|
|
|
|
|
|
|
def pack(self):
|
2020-03-01 15:56:49 +00:00
|
|
|
self.destination_hash = self.destination.hash
|
2020-04-22 10:07:13 +00:00
|
|
|
self.header = b""
|
2018-03-19 15:39:08 +00:00
|
|
|
self.header += struct.pack("!B", self.flags)
|
|
|
|
self.header += struct.pack("!B", self.hops)
|
|
|
|
|
2018-04-18 21:31:17 +00:00
|
|
|
if self.context == Packet.LRPROOF:
|
2018-04-16 15:13:39 +00:00
|
|
|
self.header += self.destination.link_id
|
2018-03-19 17:11:50 +00:00
|
|
|
self.ciphertext = self.data
|
2018-04-18 21:31:17 +00:00
|
|
|
else:
|
|
|
|
if self.header_type == Packet.HEADER_1:
|
|
|
|
self.header += self.destination.hash
|
|
|
|
|
|
|
|
if self.packet_type == Packet.ANNOUNCE:
|
|
|
|
# Announce packets are not encrypted
|
|
|
|
self.ciphertext = self.data
|
|
|
|
elif self.packet_type == Packet.PROOF and self.context == Packet.RESOURCE_PRF:
|
|
|
|
# Resource proofs are not encrypted
|
|
|
|
self.ciphertext = self.data
|
2018-04-25 20:08:17 +00:00
|
|
|
elif self.packet_type == Packet.PROOF and self.destination.type == RNS.Destination.LINK:
|
|
|
|
# Packet proofs over links are not encrypted
|
|
|
|
self.ciphertext = self.data
|
2018-04-18 21:31:17 +00:00
|
|
|
elif self.context == Packet.RESOURCE:
|
|
|
|
# A resource takes care of symmetric
|
|
|
|
# encryption by itself
|
|
|
|
self.ciphertext = self.data
|
2018-04-21 14:12:42 +00:00
|
|
|
elif self.context == Packet.KEEPALIVE:
|
|
|
|
# Keepalive packets contain no actual
|
|
|
|
# data
|
|
|
|
self.ciphertext = self.data
|
2018-04-18 21:31:17 +00:00
|
|
|
else:
|
|
|
|
# In all other cases, we encrypt the packet
|
|
|
|
# with the destination's public key
|
|
|
|
self.ciphertext = self.destination.encrypt(self.data)
|
|
|
|
|
|
|
|
if self.header_type == Packet.HEADER_2:
|
2019-11-09 22:47:42 +00:00
|
|
|
if self.transport_id != None:
|
|
|
|
self.header += self.transport_id
|
|
|
|
self.header += self.destination.hash
|
|
|
|
|
|
|
|
if self.packet_type == Packet.ANNOUNCE:
|
|
|
|
# Announce packets are not encrypted
|
|
|
|
self.ciphertext = self.data
|
2018-04-18 21:31:17 +00:00
|
|
|
else:
|
|
|
|
raise IOError("Packet with header type 2 must have a transport ID")
|
|
|
|
|
|
|
|
|
2020-04-22 10:07:13 +00:00
|
|
|
self.header += bytes([self.context])
|
2018-03-19 15:39:08 +00:00
|
|
|
self.raw = self.header + self.ciphertext
|
|
|
|
|
|
|
|
if len(self.raw) > self.MTU:
|
|
|
|
raise IOError("Packet size of "+str(len(self.raw))+" exceeds MTU of "+str(self.MTU)+" bytes")
|
|
|
|
|
|
|
|
self.packed = True
|
2020-03-01 15:56:49 +00:00
|
|
|
self.updateHash()
|
2018-03-19 15:39:08 +00:00
|
|
|
|
|
|
|
def unpack(self):
|
2020-04-22 10:07:13 +00:00
|
|
|
self.flags = self.raw[0]
|
|
|
|
self.hops = self.raw[1]
|
2018-03-19 15:39:08 +00:00
|
|
|
|
|
|
|
self.header_type = (self.flags & 0b11000000) >> 6
|
|
|
|
self.transport_type = (self.flags & 0b00110000) >> 4
|
|
|
|
self.destination_type = (self.flags & 0b00001100) >> 2
|
|
|
|
self.packet_type = (self.flags & 0b00000011)
|
|
|
|
|
|
|
|
if self.header_type == Packet.HEADER_2:
|
|
|
|
self.transport_id = self.raw[2:12]
|
|
|
|
self.destination_hash = self.raw[12:22]
|
2018-04-18 21:31:17 +00:00
|
|
|
self.context = ord(self.raw[22:23])
|
|
|
|
self.data = self.raw[23:]
|
2018-03-19 15:39:08 +00:00
|
|
|
else:
|
|
|
|
self.transport_id = None
|
|
|
|
self.destination_hash = self.raw[2:12]
|
2018-04-18 21:31:17 +00:00
|
|
|
self.context = ord(self.raw[12:13])
|
|
|
|
self.data = self.raw[13:]
|
2018-03-19 15:39:08 +00:00
|
|
|
|
|
|
|
self.packed = False
|
2020-03-01 15:56:49 +00:00
|
|
|
self.updateHash()
|
2018-03-19 15:39:08 +00:00
|
|
|
|
|
|
|
def send(self):
|
|
|
|
if not self.sent:
|
2018-04-21 11:54:22 +00:00
|
|
|
if self.destination.type == RNS.Destination.LINK:
|
|
|
|
if self.destination.status == RNS.Link.CLOSED:
|
|
|
|
raise IOError("Attempt to transmit over a closed link")
|
2018-04-21 14:12:42 +00:00
|
|
|
else:
|
|
|
|
self.destination.last_outbound = time.time()
|
|
|
|
self.destination.tx += 1
|
|
|
|
self.destination.txbytes += len(self.data)
|
|
|
|
|
2018-04-16 15:13:39 +00:00
|
|
|
if not self.packed:
|
|
|
|
self.pack()
|
|
|
|
|
2018-04-17 15:46:48 +00:00
|
|
|
if RNS.Transport.outbound(self):
|
|
|
|
return self.receipt
|
|
|
|
else:
|
|
|
|
# TODO: Don't raise error here, handle gracefully
|
|
|
|
raise IOError("Packet could not be sent! Do you have any outbound interfaces configured?")
|
2016-06-03 17:02:02 +00:00
|
|
|
else:
|
|
|
|
raise IOError("Packet was already sent")
|
|
|
|
|
|
|
|
def resend(self):
|
|
|
|
if self.sent:
|
2018-04-23 21:42:16 +00:00
|
|
|
if RNS.Transport.outbound(self):
|
|
|
|
return self.receipt
|
|
|
|
else:
|
|
|
|
# TODO: Don't raise error here, handle gracefully
|
|
|
|
raise IOError("Packet could not be sent! Do you have any outbound interfaces configured?")
|
2016-06-03 17:02:02 +00:00
|
|
|
else:
|
2018-03-20 11:32:41 +00:00
|
|
|
raise IOError("Packet was not sent yet")
|
|
|
|
|
2018-04-17 15:46:48 +00:00
|
|
|
def prove(self, destination=None):
|
2018-04-25 20:08:17 +00:00
|
|
|
if self.fromPacked and hasattr(self, "destination") and self.destination:
|
2018-03-20 11:32:41 +00:00
|
|
|
if self.destination.identity and self.destination.identity.prv:
|
|
|
|
self.destination.identity.prove(self, destination)
|
2018-04-25 20:08:17 +00:00
|
|
|
elif self.fromPacked and hasattr(self, "link") and self.link:
|
|
|
|
self.link.prove_packet(self)
|
|
|
|
else:
|
|
|
|
RNS.log("Could not prove packet associated with neither a destination nor a link", RNS.LOG_ERROR)
|
2018-03-20 11:32:41 +00:00
|
|
|
|
2018-04-17 15:46:48 +00:00
|
|
|
# Generates a special destination that allows Reticulum
|
|
|
|
# to direct the proof back to the proved packet's sender
|
|
|
|
def generateProofDestination(self):
|
|
|
|
return ProofDestination(self)
|
|
|
|
|
2018-03-20 11:32:41 +00:00
|
|
|
def validateProofPacket(self, proof_packet):
|
2018-04-17 15:46:48 +00:00
|
|
|
return self.receipt.validateProofPacket(proof_packet)
|
2018-03-20 11:32:41 +00:00
|
|
|
|
|
|
|
def validateProof(self, proof):
|
2018-04-17 15:46:48 +00:00
|
|
|
return self.receipt.validateProof(proof)
|
|
|
|
|
|
|
|
def updateHash(self):
|
|
|
|
self.packet_hash = self.getHash()
|
|
|
|
|
|
|
|
def getHash(self):
|
|
|
|
return RNS.Identity.fullHash(self.getHashablePart())
|
|
|
|
|
2020-03-06 21:20:50 +00:00
|
|
|
def getTruncatedHash(self):
|
|
|
|
return RNS.Identity.truncatedHash(self.getHashablePart())
|
|
|
|
|
2018-04-17 15:46:48 +00:00
|
|
|
def getHashablePart(self):
|
2020-04-22 10:07:13 +00:00
|
|
|
hashable_part = bytes([self.raw[0] & 0b00001111])
|
2020-03-01 15:56:49 +00:00
|
|
|
if self.header_type == Packet.HEADER_2:
|
|
|
|
hashable_part += self.raw[12:]
|
|
|
|
else:
|
|
|
|
hashable_part += self.raw[2:]
|
|
|
|
|
|
|
|
return hashable_part
|
2018-03-20 11:32:41 +00:00
|
|
|
|
2018-04-17 15:46:48 +00:00
|
|
|
class ProofDestination:
|
|
|
|
def __init__(self, packet):
|
|
|
|
self.hash = packet.getHash()[:10];
|
|
|
|
self.type = RNS.Destination.SINGLE
|
2018-03-20 11:32:41 +00:00
|
|
|
|
2018-04-17 15:46:48 +00:00
|
|
|
def encrypt(self, plaintext):
|
|
|
|
return plaintext
|
2018-03-20 11:32:41 +00:00
|
|
|
|
2018-04-18 21:31:17 +00:00
|
|
|
|
|
|
|
class PacketReceipt:
|
|
|
|
# Receipt status constants
|
|
|
|
FAILED = 0x00
|
|
|
|
SENT = 0x01
|
|
|
|
DELIVERED = 0x02
|
|
|
|
|
|
|
|
|
2020-04-22 10:07:13 +00:00
|
|
|
EXPL_LENGTH = RNS.Identity.HASHLENGTH//8+RNS.Identity.SIGLENGTH//8
|
|
|
|
IMPL_LENGTH = RNS.Identity.SIGLENGTH//8
|
2018-04-18 21:31:17 +00:00
|
|
|
|
|
|
|
# Creates a new packet receipt from a sent packet
|
|
|
|
def __init__(self, packet):
|
|
|
|
self.hash = packet.getHash()
|
|
|
|
self.sent = True
|
|
|
|
self.sent_at = time.time()
|
|
|
|
self.timeout = Packet.TIMEOUT
|
|
|
|
self.proved = False
|
|
|
|
self.status = PacketReceipt.SENT
|
|
|
|
self.destination = packet.destination
|
|
|
|
self.callbacks = PacketReceiptCallbacks()
|
|
|
|
self.concluded_at = None
|
|
|
|
|
|
|
|
# Validate a proof packet
|
|
|
|
def validateProofPacket(self, proof_packet):
|
2018-04-25 20:08:17 +00:00
|
|
|
if hasattr(proof_packet, "link") and proof_packet.link:
|
|
|
|
return self.validate_link_proof(proof_packet.data, proof_packet.link)
|
|
|
|
else:
|
|
|
|
return self.validateProof(proof_packet.data)
|
|
|
|
|
|
|
|
# Validate a raw proof for a link
|
|
|
|
def validate_link_proof(self, proof, link):
|
|
|
|
# TODO: Hardcoded as explicit proofs for now
|
|
|
|
if True or len(proof) == PacketReceipt.EXPL_LENGTH:
|
|
|
|
# This is an explicit proof
|
2020-04-22 10:07:13 +00:00
|
|
|
proof_hash = proof[:RNS.Identity.HASHLENGTH//8]
|
|
|
|
signature = proof[RNS.Identity.HASHLENGTH//8:RNS.Identity.HASHLENGTH//8+RNS.Identity.SIGLENGTH//8]
|
2018-04-25 20:08:17 +00:00
|
|
|
if proof_hash == self.hash:
|
|
|
|
proof_valid = link.validate(signature, self.hash)
|
|
|
|
if proof_valid:
|
|
|
|
self.status = PacketReceipt.DELIVERED
|
|
|
|
self.proved = True
|
|
|
|
self.concluded_at = time.time()
|
|
|
|
if self.callbacks.delivery != None:
|
|
|
|
self.callbacks.delivery(self)
|
|
|
|
return True
|
|
|
|
else:
|
|
|
|
return False
|
|
|
|
else:
|
|
|
|
return False
|
|
|
|
elif len(proof) == PacketReceipt.IMPL_LENGTH:
|
|
|
|
pass
|
2020-04-22 10:07:13 +00:00
|
|
|
# TODO: Why is this disabled?
|
|
|
|
# signature = proof[:RNS.Identity.SIGLENGTH//8]
|
2018-04-25 20:08:17 +00:00
|
|
|
# proof_valid = self.link.validate(signature, self.hash)
|
|
|
|
# if proof_valid:
|
|
|
|
# self.status = PacketReceipt.DELIVERED
|
|
|
|
# self.proved = True
|
|
|
|
# self.concluded_at = time.time()
|
|
|
|
# if self.callbacks.delivery != None:
|
|
|
|
# self.callbacks.delivery(self)
|
|
|
|
# RNS.log("valid")
|
|
|
|
# return True
|
|
|
|
# else:
|
|
|
|
# RNS.log("invalid")
|
|
|
|
# return False
|
|
|
|
else:
|
|
|
|
return False
|
2018-04-18 21:31:17 +00:00
|
|
|
|
|
|
|
# Validate a raw proof
|
|
|
|
def validateProof(self, proof):
|
|
|
|
if len(proof) == PacketReceipt.EXPL_LENGTH:
|
|
|
|
# This is an explicit proof
|
2020-04-22 10:07:13 +00:00
|
|
|
proof_hash = proof[:RNS.Identity.HASHLENGTH//8]
|
|
|
|
signature = proof[RNS.Identity.HASHLENGTH//8:RNS.Identity.HASHLENGTH//8+RNS.Identity.SIGLENGTH//8]
|
2018-04-18 21:31:17 +00:00
|
|
|
if proof_hash == self.hash:
|
|
|
|
proof_valid = self.destination.identity.validate(signature, self.hash)
|
|
|
|
if proof_valid:
|
|
|
|
self.status = PacketReceipt.DELIVERED
|
|
|
|
self.proved = True
|
2018-04-24 22:20:57 +00:00
|
|
|
self.concluded_at = time.time()
|
2018-04-18 21:31:17 +00:00
|
|
|
if self.callbacks.delivery != None:
|
|
|
|
self.callbacks.delivery(self)
|
|
|
|
return True
|
|
|
|
else:
|
|
|
|
return False
|
|
|
|
else:
|
|
|
|
return False
|
|
|
|
elif len(proof) == PacketReceipt.IMPL_LENGTH:
|
|
|
|
# This is an implicit proof
|
2020-03-06 11:55:05 +00:00
|
|
|
if self.destination.identity == None:
|
|
|
|
return False
|
|
|
|
|
2020-04-22 10:07:13 +00:00
|
|
|
signature = proof[:RNS.Identity.SIGLENGTH//8]
|
2018-04-18 21:31:17 +00:00
|
|
|
proof_valid = self.destination.identity.validate(signature, self.hash)
|
|
|
|
if proof_valid:
|
|
|
|
self.status = PacketReceipt.DELIVERED
|
|
|
|
self.proved = True
|
2018-04-24 22:20:57 +00:00
|
|
|
self.concluded_at = time.time()
|
2018-04-18 21:31:17 +00:00
|
|
|
if self.callbacks.delivery != None:
|
|
|
|
self.callbacks.delivery(self)
|
|
|
|
return True
|
|
|
|
else:
|
|
|
|
return False
|
|
|
|
else:
|
|
|
|
return False
|
|
|
|
|
2018-04-24 22:20:57 +00:00
|
|
|
def rtt(self):
|
|
|
|
return self.concluded_at - self.sent_at
|
2018-04-18 21:31:17 +00:00
|
|
|
|
2018-04-25 20:08:17 +00:00
|
|
|
def is_timed_out(self):
|
2018-04-18 21:31:17 +00:00
|
|
|
return (self.sent_at+self.timeout < time.time())
|
|
|
|
|
2018-04-25 20:08:17 +00:00
|
|
|
def check_timeout(self):
|
|
|
|
if self.is_timed_out():
|
2018-04-18 21:31:17 +00:00
|
|
|
self.status = PacketReceipt.FAILED
|
|
|
|
self.concluded_at = time.time()
|
|
|
|
if self.callbacks.timeout:
|
|
|
|
self.callbacks.timeout(self)
|
|
|
|
|
|
|
|
|
|
|
|
# Set the timeout in seconds
|
2018-04-25 20:08:17 +00:00
|
|
|
def set_timeout(self, timeout):
|
2018-04-18 21:31:17 +00:00
|
|
|
self.timeout = float(timeout)
|
|
|
|
|
|
|
|
# Set a function that gets called when
|
|
|
|
# a successfull delivery has been proved
|
|
|
|
def delivery_callback(self, callback):
|
|
|
|
self.callbacks.delivery = callback
|
|
|
|
|
|
|
|
# Set a function that gets called if the
|
|
|
|
# delivery times out
|
|
|
|
def timeout_callback(self, callback):
|
|
|
|
self.callbacks.timeout = callback
|
|
|
|
|
|
|
|
class PacketReceiptCallbacks:
|
|
|
|
def __init__(self):
|
|
|
|
self.delivery = None
|
|
|
|
self.timeout = None
|