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Work on bundles

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This commit is contained in:
Mark Qvist 2020-08-12 14:06:29 +02:00
parent 90f2a84243
commit 4a3ee622ec
3 changed files with 207 additions and 41 deletions
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166
RNS/Bundle.py
View File

@ -5,30 +5,41 @@ import os.path
from .vendor import umsgpack as umsgpack
class Bundle:
APP_NAME = "rnsbundle"
NO_CUSTODY = 0x00;
TAKING_CUSTODY = 0x01;
FULL_CUSTODY = 0x02;
REMOVED = 0xFF;
CHUNK_SIZE = RNS.Resource.MAX_EFFICIENT_SIZE / 4
def __init__(self, destination = None, data = None, filepath = None, advertised_id = None):
self.destination = destination
self.state = None
self.data_file = None
self.meta_file = None
self.id = None
self.storagepath = None
self.size = None
self.chunks = 0
self.heartbeat = time.time()
self.resources = []
def __init__(self, destination_hash = None, data = None, filepath = None, advertisement_data = None):
self.destination_hash = None
self.is_originator = False
self.state = None
self.data_file = None
self.meta_file = None
self.data_hash = None
self.id = None
self.storagepath = None
self.size = None
self.chunks = 0
self.created = time.time()
self.heartbeat = created
self.transferring = False
self.chunk_request_destination = None
try:
if data != None or filepath != None:
self.destination_hash = destination_hash
self.is_originator = True
self.id = RNS.Identity.getRandomHash()
if filepath == None and data != None:
try:
self.id = RNS.Identity.fullHash(data)
self.data_hash = RNS.Identity.fullHash(data)
self.storagepath = Reticulum.bundlepath+"/"+self.id.hex()
self.datapath = self.storagepath+"/data"
self.metadatapath = self.storagepath+"/metadata"
@ -50,7 +61,7 @@ class Bundle:
elif data == None and filepath != None:
try:
input_file = open(filepath, "rb")
self.id = RNS.Identity.fullHash(input_file.read())
self.data_hash = RNS.Identity.fullHash(input_file.read())
input_file.seek(0)
self.storagepath = RNS.Reticulum.bundlepath+"/"+self.id.hex()
@ -76,42 +87,141 @@ class Bundle:
else:
raise ValueError("Bundle cannot be created from data and file path at the same time")
elif advertised_id != None:
# Prepare file handles and metadata
self.size = os.stat(self.datapath).st_size
if self.size < 1:
raise IOError("Bundle data is empty")
self.data_file = open(self.datapath, "rb")
elif advertisement_data != None:
# Incoming bundle transfer
self.id = advertisement_data[1]
self.destination_hash = advertisement_data[0]
self.state = Bundle.TAKING_CUSTODY
self.storagepath = Reticulum.bundlepath+"/"+self.id.hex()
self.datapath = self.storagepath+"/data"
self.metadatapath = self.storagepath+"/metadata"
if not os.path.isdir(self.storagepath):
os.makedirs(self.storagepath)
else:
RNS.log("Warning, bundle already exists in storage location, recreating", RNS.LOG_DEBUG)
self.data_file = open(self.datapath, "wb")
self.data_file.close()
self.size = advertisement_data[2]
self.data_file = open(self.datapath, "wb")
else:
raise ValueError("No source of data specified for bundle initialisation")
# Prepare file handles and metadata
self.size = os.stat(self.datapath).st_size
if self.size < 1:
raise IOError("Bundle data is empty")
self.chunks = ((self.size-1)//Bundle.CHUNK_SIZE)+1
self.data_file = open(self.datapath, "rb")
self.flush_metadata()
RNS.Transport.register_bundle(self)
except Exception as e:
RNS.log("Error while initialising bundle. The contained exception was:", RNS.LOG_ERROR)
RNS.log(str(e), RNS.LOG_ERROR)
# TODO: Remove
raise e
def get_packed_metadata(self):
metadata = {
"destination": self.destination,
"heartbeat": self.heartbeat,
"size": self.size,
"is_originator": self.is_originator
"state": self.state}
return umsgpack.packb(metadata)
def flush_metadata(self):
try:
metadata = {
"destination": self.destination,
"heartbeat": self.heartbeat,
"size": self.size,
"chunks": self.chunks,
"state": self.state}
self.meta_file = open(self.metadatapath, "wb")
self.meta_file.write(umsgpack.packb(metadata))
self.meta_file.write(self.get_packed_metadata())
self.meta_file.close()
except Exception as e:
RNS.log("Error while flushing metadata for bundle "+RNS.prettyhexrep(self.id), RNS.LOG_ERROR)
RNS.log("The contained exception was: "+str(e), RNS.LOG_ERROR)
def register_destinations(self, destination):
self.chunk_request_destination = RNS.Destination(None, RNS.Destination.IN, RNS.Destination.SINGLE, APP_NAME, "chunk", "request")
self.chunk_request_destination.link_established_callback(requester_connected)
def advertise(self, advertise_to):
advertisement = [
self.destination,
self.id,
self.size,
self.chunks]
advertisement_data = umsgpack.packb(advertisement)
advertisement_packet = RNS.Packet(advertise_to, advertisement_data)
advertisement.packet.send()
def requester_connected(self, link):
RNS.log("Requester connected to bundle "+RNS.prettyhexrep(self.id), RNS.LOG_DEBUG)
link.packet_callback(chunk_request)
def chunk_request(self, data, packet):
chunk_index = data[0]
RNS.log("Request for chunk "+str(chunk_index)+"/"+str(self.chunks)+" of bundle "+RNS.prettyhexrep(self.id), RNS.LOG_DEBUG)
if chunk_index < self.chunks:
self.emit_resource(packet.link, chunk_index)
else:
RNS.log("Bundle transfer client requested chunk index out of range, tearing down link.", RNS.LOG_ERROR)
packet.link.teardown()
def emit_resource(self, link, chunk_index):
if not self.transferring:
chunk_max = self.size-1
chunk_start = chunk_index*CHUNK_SIZE
chunk_end = (chunk_index+1)*CHUNK_SIZE-1
if chunk_end > chunk_max:
chunk_end = chunk_max
read_size = chunk_end - chunk_start
try:
file = open(self.datapath, "rb")
file.seek(chunk_start)
data = file.read(read_size)
chunk_resource = RNS.Resource(data, link, callback=resource_concluded)
chunk_resource.chunk_index = chunk_index
except Exception as e:
RNS.log("Could not read bundle data from storage, the contained exception was:", RNS.LOG_ERROR)
RNS.log(str(e))
link.teardown()
else:
RNS.log("Bundle chunk "+str(chunk_index)+" for "+RNS.prettyhexrep(self.id)+" was requested while a transfer was already in progress", RNS.LOG_ERROR)
def resource_concluded(self, resource):
RNS.log("Concluded transferring chunk "+str(resource.chunk_index)+"/"+str(self.chunks)+" of bundle "+RNS.prettyhexrep(self.id), RNS.LOG_DEBUG)
self.transferring = False
def resign_custody(self):
self.state = Bundle.NO_CUSTODY
self.heartbeat = time.time()
def custody_proof(self, proof):
pass
def remove(self):
try:
self.state = Bundle.REMOVED
RNS.Transport.deregister_destination(self.chunk_request_destination)
os.unlink(self.datapath)
os.unlink(self.metadatapath)
os.rmdir(self.storagepath)
except Exception as e:
RNS.log("Error while removing bundle from storage, the contained exception was:", RNS.LOG_ERROR)
RNS.log(str(e), RNS.LOG_ERROR)
class BundleAdvertisement:
pass

2
RNS/Resource.py
View File

@ -697,4 +697,4 @@ class ResourceAdvertisement:
adv.e = True if (adv.f & 0x01) == 0x01 else False
adv.c = True if ((adv.f >> 1) & 0x01) == 0x01 else False
return adv
return adv

80
RNS/Transport.py
View File

@ -33,28 +33,32 @@ class Transport:
# TODO: Calculate an optimal number for this in
# various situations
LOCAL_REBROADCASTS_MAX = 2 # How many local rebroadcasts of an announce is allowed
LOCAL_REBROADCASTS_MAX = 2 # How many local rebroadcasts of an announce is allowed
PATH_REQUEST_GRACE = 0.35 # Grace time before a path announcement is made, allows directly reachable peers to respond first
PATH_REQUEST_RW = 2 # Path request random window
PATH_REQUEST_GRACE = 0.35 # Grace time before a path announcement is made, allows directly reachable peers to respond first
PATH_REQUEST_RW = 2 # Path request random window
LINK_TIMEOUT = RNS.Link.KEEPALIVE * 2
REVERSE_TIMEOUT = 30*60 # Reverse table entries are removed after max 30 minutes
REVERSE_TIMEOUT = 30*60 # Reverse table entries are removed after max 30 minutes
DESTINATION_TIMEOUT = 60*60*24*7 # Destination table entries are removed if unused for one week
MAX_RECEIPTS = 1024 # Maximum number of receipts to keep track of
interfaces = [] # All active interfaces
destinations = [] # All active destinations
pending_links = [] # Links that are being established
active_links = [] # Links that are active
packet_hashlist = [] # A list of packet hashes for duplicate detection
receipts = [] # Receipts of all outgoing packets for proof processing
BUNDLE_TIMEOUT = 60*60*24*7 # Bundles time out after 7 days
BUNDLE_INTERVAL = 180 # How often we should attempt to transfer bundles to their next hop
interfaces = [] # All active interfaces
destinations = [] # All active destinations
pending_links = [] # Links that are being established
active_links = [] # Links that are active
packet_hashlist = [] # A list of packet hashes for duplicate detection
receipts = [] # Receipts of all outgoing packets for proof processing
# TODO: "destination_table" should really be renamed to "path_table"
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
link_table = {} # A lookup table containing hops for links
bundle_table = {} # A table for holding references to bundles in transport
held_announces = {} # A table containing temporarily held announce-table entries
# Transport control destinations are used
@ -107,9 +111,16 @@ class Transport:
# Create transport-specific destinations
Transport.path_request_destination = RNS.Destination(None, RNS.Destination.IN, RNS.Destination.PLAIN, Transport.APP_NAME, "path", "request")
Transport.path_request_destination.packet_callback(Transport.pathRequestHandler)
Transport.path_request_destination.packet_callback(Transport.path_request_handler)
Transport.bundle_advertisement_destination = RNS.Destination(None, RNS.Destination.IN, RNS.Destination.PLAIN, Transport.APP_NAME, "bundle", "advertisement", )
Transport.bundle_advertisement_destination.packet_callback(Transport.bundle_advertisement_handler)
Transport.control_destinations.append(Transport.path_request_destination)
Transport.control_hashes.append(Transport.path_request_destination.hash)
Transport.control_destinations.append(Transport.bundle_advertisement_destination)
Transport.control_hashes.append(Transport.bundle_advertisement_destination.hash)
thread = threading.Thread(target=Transport.jobloop)
thread.setDaemon(True)
@ -300,6 +311,8 @@ class Transport:
Transport.tables_last_culled = time.time()
Transport.bundle_jobs()
except Exception as e:
RNS.log("An exception occurred while running Transport jobs.", RNS.LOG_ERROR)
RNS.log("The contained exception was: "+str(e), RNS.LOG_ERROR)
@ -310,6 +323,35 @@ class Transport:
for packet in outgoing:
packet.send()
@staticmethod
def bundle_jobs():
removed_bundles = []
for bundle in Transport.bundle_table:
# The bundle could not be passed on within the allowed
# time, and should be removed from storage
if bundle.heartbeat+Transport.BUNDLE_TIMEOUT < time.time():
RNS.log("Removing stale bundle "+RNS.prettyhexrep(bundle.id)+" from storage", RNS.LOG_VERBOSE)
removed_bundles.append(bundle)
bundle.remove()
# Custody was transferred to another node, we'll remove the bundle
if bundle.state == RNS.Bundle.NO_CUSTODY:
RNS.log("Removing bundle "+RNS.prettyhexrep(bundle.id)+" from storage since custody was transferred", RNS.LOG_VERBOSE)
removed_bundles.append(bundle)
bundle.remove()
# This is an incoming bundle, attempt to retrieve it
if bundle.state == RNS.Bundle.TAKING_CUSTODY:
pass
# We have custody over this bundle, and we should attempt
# to deliver it to it's next hop.
if bundle.state == RNS.Bundle.FULL_CUSTODY:
pass
for bundle in removed_bundles:
Transport.bundle_table.remove(bundle)
@staticmethod
def outbound(packet):
while (Transport.jobs_running):
@ -852,6 +894,11 @@ class Transport:
if destination.direction == RNS.Destination.IN:
Transport.destinations.append(destination)
@staticmethod
def deregister_destination(destination):
if destination in Transport.destinations:
Transport.destinations.remove(destination)
@staticmethod
def registerLink(link):
RNS.log("Registering link "+str(link), RNS.LOG_DEBUG)
@ -870,6 +917,11 @@ class Transport:
else:
RNS.log("Attempted to activate a link that was not in the pending table", RNS.LOG_ERROR)
@staticmethod
def register_bundle(bundle):
RNS.log("Transport instance registered bundle "+RNS.prettyhexrep(bundle.id), RNS.LOG_DEBUG)
self.bundle_table.append(bundle)
@staticmethod
def find_interface_from_hash(interface_hash):
for interface in Transport.interfaces:
@ -983,7 +1035,7 @@ class Transport:
packet.send()
@staticmethod
def pathRequestHandler(data, packet):
def path_request_handler(data, packet):
if len(data) >= RNS.Identity.TRUNCATED_HASHLENGTH//8:
Transport.pathRequest(
data[:RNS.Identity.TRUNCATED_HASHLENGTH//8],
@ -991,6 +1043,10 @@ class Transport:
packet.receiving_interface
)
@staticmethod
def bundle_advertisement_handler(data, packet):
pass
@staticmethod
def pathRequest(destination_hash, is_from_local_client, attached_interface):
RNS.log("Path request for "+RNS.prettyhexrep(destination_hash), RNS.LOG_DEBUG)