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Implemented bandwidth-based announce propagation calculation

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This commit is contained in:
Mark Qvist 2022-04-18 16:23:24 +02:00
parent 64593e27be
commit 31104c6e9c
3 changed files with 131 additions and 7 deletions
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58
RNS/Interfaces/Interface.py
View File

@ -21,6 +21,8 @@
# SOFTWARE.
import RNS
import time
import threading
class Interface:
IN = False
@ -41,5 +43,61 @@ class Interface:
def get_hash(self):
return RNS.Identity.full_hash(str(self).encode("utf-8"))
# TODO: Clean
# def bogus_queue(self):
# self.announce_queue = []
# import random
# import time
# now = time.time()
# random.seed(45)
# for i in range(1,32):
# entry = {"time": now+i*3, "hops":random.randint(4,16), "raw": str("bogus_data_"+str(i)).encode("utf-8")}
# self.announce_queue.append(entry)
def process_announce_queue(self):
if not hasattr(self, "announce_cap"):
self.announce_cap = RNS.Reticulum.ANNOUNCE_CAP
if hasattr(self, "announce_queue"):
# TODO: Clean
# RNS.log("Processing announce queue on "+str(self), RNS.LOG_DEBUG)
try:
now = time.time()
stale = []
for a in self.announce_queue:
if now > a["time"]+RNS.Reticulum.QUEUED_ANNOUNCE_LIFE:
stale.append(a)
for s in stale:
self.announce_queue.remove(s)
if len(self.announce_queue) > 0:
min_hops = min(entry["hops"] for entry in self.announce_queue)
entries = list(filter(lambda e: e["hops"] == min_hops, self.announce_queue))
entries.sort(key=lambda e: e["time"])
selected = entries[0]
now = time.time()
tx_time = (len(selected["raw"])*8) / self.bitrate
wait_time = (tx_time / self.announce_cap)
self.announce_allowed_at = now + wait_time
self.processOutgoing(selected["raw"])
self.announce_queue.remove(selected)
# TODO: Clean debug statements
# RNS.log("Sent queued announce with "+str(selected["hops"])+" hops on "+str(self))
if len(self.announce_queue) > 0:
# TODO: Clean debug statements
# RNS.log("Still have "+str(len(self.announce_queue))+" announces in queue, scheduling next for tx in "+str(round(wait_time*1000,6))+"ms", RNS.LOG_DEBUG)
timer = threading.Timer(wait_time, self.process_announce_queue)
timer.start()
except Exception as e:
self.announce_queue = []
RNS.log("Error while processing announce queue on "+str(self)+". The contained exception was: "+str(e), RNS.LOG_ERROR)
RNS.log("The announce queue for this interface has been cleared.", RNS.LOG_ERROR)
def detach(self):
pass

3
RNS/Reticulum.py
View File

@ -85,6 +85,9 @@ class Reticulum:
the default value.
"""
MAX_QUEUED_ANNOUNCES = 16384
QUEUED_ANNOUNCE_LIFE = 60*60*24
ANNOUNCE_CAP = 2
"""
The maximum percentage of interface bandwidth that, at any given time,

77
RNS/Transport.py
View File

@ -56,7 +56,7 @@ class Transport:
PATHFINDER_D = 10 # Fixed per-hop delay
PATHFINDER_R = 1 # Retransmit retries
PATHFINDER_T = 10 # Retry grace period
PATHFINDER_RW = 5 # Random window for announce rebroadcast
PATHFINDER_RW = 4 # Random window for announce rebroadcast
PATHFINDER_E = 60*60*24*7 # Path expiration of one week
AP_PATH_TIME = 60*60*24 # Path expiration of one day for Access Point paths
@ -82,6 +82,7 @@ class Transport:
# TODO: "destination_table" should really be renamed to "path_table"
# Notes on memory usage: 1 megabyte of memory can store approximately
# 55.100 path table entries or approximately 22.300 link table entries.
announce_table = {} # A table for storing announces currently waiting to be retransmitted
destination_table = {} # A lookup table containing the next hop to a given destination
reverse_table = {} # A lookup table for storing packet hashes used to return proofs and replies
@ -302,7 +303,6 @@ class Transport:
break
else:
if time.time() > announce_entry[1]:
# announce_entry[1] = time.time() + math.pow(Transport.PATHFINDER_C, announce_entry[4]) + Transport.PATHFINDER_T + Transport.PATHFINDER_RW
announce_entry[1] = time.time() + math.pow(Transport.PATHFINDER_C, announce_entry[4]) + Transport.PATHFINDER_T + Transport.PATHFINDER_RW
announce_entry[2] += 1
packet = announce_entry[5]
@ -476,12 +476,14 @@ class Transport:
@staticmethod
def outbound(packet):
while (Transport.jobs_running):
# TODO: Profile actual impact here on faster links
sleep(0.01)
Transport.jobs_locked = True
# TODO: This updateHash call might be redundant
packet.update_hash()
sent = False
outbound_time = time.time()
# Check if we have a known path for the destination in the path table
if packet.packet_type != RNS.Packet.ANNOUNCE and packet.destination.type != RNS.Destination.PLAIN and packet.destination.type != RNS.Destination.GROUP and packet.destination_hash in Transport.destination_table:
@ -550,17 +552,75 @@ class Transport:
should_transmit = False
if packet.packet_type == RNS.Packet.ANNOUNCE:
if packet.attached_interface == None and interface.mode == RNS.Interfaces.Interface.Interface.MODE_ACCESS_POINT:
RNS.log("Blocking announce broadcast on "+str(interface)+" due to AP mode", RNS.LOG_DEBUG)
should_transmit = False
# TODO: Add capacity limit based on interface bandwidth
if packet.attached_interface == None:
if interface.mode == RNS.Interfaces.Interface.Interface.MODE_ACCESS_POINT:
RNS.log("Blocking announce broadcast on "+str(interface)+" due to AP mode", RNS.LOG_EXTREME)
should_transmit = False
else:
# TODO: Remove logging statements
if packet.hops > 0:
if not hasattr(interface, "announce_cap"):
interface.announce_cap = RNS.Reticulum.ANNOUNCE_CAP
if not hasattr(interface, "announce_allowed_at"):
interface.announce_allowed_at = 0
if not hasattr(interface, "announce_queue"):
interface.announce_queue = []
queued_announces = True if len(interface.announce_queue) > 0 else False
if not queued_announces and outbound_time > interface.announce_allowed_at:
tx_time = (len(packet.raw)*8) / interface.bitrate
wait_time = (tx_time / interface.announce_cap)
interface.announce_allowed_at = outbound_time + wait_time
else:
should_transmit = False
if not len(interface.announce_queue) >= RNS.Reticulum.MAX_QUEUED_ANNOUNCES:
entry = {"time": outbound_time, "hops": packet.hops, "raw": packet.raw}
queued_announces = True if len(interface.announce_queue) > 0 else False
interface.announce_queue.append(entry)
# TODO: Clean
# RNS.log("Added announce to queue on "+str(interface), RNS.LOG_DEBUG)
if not queued_announces:
# TODO: Clean
# RNS.log("Interface "+str(interface)+" still waiting for announce allowance", RNS.LOG_DEBUG)
wait_time = max(interface.announce_allowed_at - time.time(), 0)
timer = threading.Timer(wait_time, interface.process_announce_queue)
timer.start()
# TODO: Clean
# RNS.log("Triggering run in "+str(wait_time)+" seconds", RNS.LOG_DEBUG)
else:
# TODO: Clean
# RNS.log("Interface "+str(interface)+" has announces in queue, adding directly to it", RNS.LOG_DEBUG)
pass
else:
# TODO: Clean
# RNS.log("Not retransmitting announce on "+str(interface)+" since the queue is full", RNS.LOG_DEBUG)
pass
else:
# TODO: Clean
# RNS.log("Skipping announce cap calculations for "+str(packet.hops)+" hop packet", RNS.LOG_DEBUG)
pass
if should_transmit:
if not stored_hash:
Transport.packet_hashlist.append(packet.packet_hash)
stored_hash = True
interface.processOutgoing(packet.raw)
def send_packet():
interface.processOutgoing(packet.raw)
thread = threading.Thread(target=send_packet)
thread.daemon = True
thread.start()
sent = True
if sent:
@ -641,6 +701,9 @@ class Transport:
def inbound(raw, interface=None):
while (Transport.jobs_running):
sleep(0.01)
if Transport.identity == None:
return
Transport.jobs_locked = True