mirror of
https://github.com/markqvist/Reticulum.git
synced 2024-12-23 20:30:18 +00:00
259 lines
9.7 KiB
Python
259 lines
9.7 KiB
Python
import asyncio
|
|
|
|
from . import sam
|
|
from . import exceptions
|
|
from . import utils
|
|
from .log import logger
|
|
|
|
def parse_reply(data):
|
|
if not data:
|
|
raise ConnectionAbortedError("Empty response: SAM API went offline")
|
|
|
|
try:
|
|
msg = sam.Message(data.decode().strip())
|
|
logger.debug("SAM reply: "+str(msg))
|
|
except:
|
|
raise ConnectionAbortedError("Invalid SAM response")
|
|
|
|
return msg
|
|
|
|
|
|
async def get_sam_socket(sam_address=sam.DEFAULT_ADDRESS, loop=None):
|
|
"""A couroutine used to create a new SAM socket.
|
|
|
|
:param sam_address: (optional) SAM API address
|
|
:param loop: (optional) event loop instance
|
|
:return: A (reader, writer) pair
|
|
"""
|
|
reader, writer = await asyncio.open_connection(*sam_address)
|
|
writer.write(sam.hello("3.1", "3.1"))
|
|
reply = parse_reply(await reader.readline())
|
|
if reply.ok:
|
|
return (reader, writer)
|
|
else:
|
|
writer.close()
|
|
raise exceptions.SAM_EXCEPTIONS[reply["RESULT"]]()
|
|
|
|
async def dest_lookup(domain, sam_address=sam.DEFAULT_ADDRESS,
|
|
loop=None):
|
|
"""A coroutine used to lookup a full I2P destination by .i2p domain or
|
|
.b32.i2p address.
|
|
|
|
:param domain: Address to be resolved, can be a .i2p domain or a .b32.i2p
|
|
address.
|
|
:param sam_address: (optional) SAM API address
|
|
:param loop: (optional) Event loop instance
|
|
:return: An instance of :class:`Destination`
|
|
"""
|
|
reader, writer = await get_sam_socket(sam_address, loop)
|
|
writer.write(sam.naming_lookup(domain))
|
|
reply = parse_reply(await reader.readline())
|
|
writer.close()
|
|
if reply.ok:
|
|
return sam.Destination(reply["VALUE"])
|
|
else:
|
|
raise exceptions.SAM_EXCEPTIONS[reply["RESULT"]]()
|
|
|
|
async def new_destination(sam_address=sam.DEFAULT_ADDRESS, loop=None,
|
|
sig_type=sam.Destination.default_sig_type):
|
|
"""A coroutine used to generate a new destination with a private key of a
|
|
chosen signature type.
|
|
|
|
:param sam_address: (optional) SAM API address
|
|
:param loop: (optional) Event loop instance
|
|
:param sig_type: (optional) Signature type
|
|
:return: An instance of :class:`Destination`
|
|
"""
|
|
reader, writer = await get_sam_socket(sam_address, loop)
|
|
writer.write(sam.dest_generate(sig_type))
|
|
reply = parse_reply(await reader.readline())
|
|
writer.close()
|
|
return sam.Destination(reply["PRIV"], has_private_key=True)
|
|
|
|
async def create_session(session_name, sam_address=sam.DEFAULT_ADDRESS,
|
|
loop=None, style="STREAM",
|
|
signature_type=sam.Destination.default_sig_type,
|
|
destination=None, options={}):
|
|
"""A coroutine used to create a new SAM session.
|
|
|
|
:param session_name: Session nick name
|
|
:param sam_address: (optional) SAM API address
|
|
:param loop: (optional) Event loop instance
|
|
:param style: (optional) Session style, can be STREAM, DATAGRAM, RAW
|
|
:param signature_type: (optional) If the destination is TRANSIENT, this
|
|
signature type is used
|
|
:param destination: (optional) Destination to use in this session. Can be
|
|
a base64 encoded string, :class:`Destination`
|
|
instance or None. TRANSIENT destination is used when it
|
|
is None.
|
|
:param options: (optional) A dict object with i2cp options
|
|
:return: A (reader, writer) pair
|
|
"""
|
|
logger.debug("Creating session {}".format(session_name))
|
|
if destination:
|
|
if type(destination) == sam.Destination:
|
|
destination = destination
|
|
else:
|
|
destination = sam.Destination(
|
|
destination, has_private_key=True)
|
|
|
|
dest_string = destination.private_key.base64
|
|
else:
|
|
dest_string = sam.TRANSIENT_DESTINATION
|
|
|
|
options = " ".join(["{}={}".format(k, v) for k, v in options.items()])
|
|
|
|
reader, writer = await get_sam_socket(sam_address, loop)
|
|
writer.write(sam.session_create(
|
|
style, session_name, dest_string, options))
|
|
|
|
reply = parse_reply(await reader.readline())
|
|
if reply.ok:
|
|
if not destination:
|
|
destination = sam.Destination(
|
|
reply["DESTINATION"], has_private_key=True)
|
|
logger.debug(destination.base32)
|
|
logger.debug("Session created {}".format(session_name))
|
|
return (reader, writer)
|
|
else:
|
|
writer.close()
|
|
raise exceptions.SAM_EXCEPTIONS[reply["RESULT"]]()
|
|
|
|
async def stream_connect(session_name, destination,
|
|
sam_address=sam.DEFAULT_ADDRESS, loop=None):
|
|
"""A coroutine used to connect to a remote I2P destination.
|
|
|
|
:param session_name: Session nick name
|
|
:param destination: I2P destination to connect to
|
|
:param sam_address: (optional) SAM API address
|
|
:param loop: (optional) Event loop instance
|
|
:return: A (reader, writer) pair
|
|
"""
|
|
logger.debug("Connecting stream {}".format(session_name))
|
|
if isinstance(destination, str) and not destination.endswith(".i2p"):
|
|
destination = sam.Destination(destination)
|
|
elif isinstance(destination, str):
|
|
destination = await dest_lookup(destination, sam_address, loop)
|
|
|
|
reader, writer = await get_sam_socket(sam_address, loop)
|
|
writer.write(sam.stream_connect(session_name, destination.base64,
|
|
silent="false"))
|
|
reply = parse_reply(await reader.readline())
|
|
if reply.ok:
|
|
logger.debug("Stream connected {}".format(session_name))
|
|
return (reader, writer)
|
|
else:
|
|
writer.close()
|
|
raise exceptions.SAM_EXCEPTIONS[reply["RESULT"]]()
|
|
|
|
async def stream_accept(session_name, sam_address=sam.DEFAULT_ADDRESS,
|
|
loop=None):
|
|
"""A coroutine used to accept a connection from the I2P network.
|
|
|
|
:param session_name: Session nick name
|
|
:param sam_address: (optional) SAM API address
|
|
:param loop: (optional) Event loop instance
|
|
:return: A (reader, writer) pair
|
|
"""
|
|
reader, writer = await get_sam_socket(sam_address, loop)
|
|
writer.write(sam.stream_accept(session_name, silent="false"))
|
|
reply = parse_reply(await reader.readline())
|
|
if reply.ok:
|
|
return (reader, writer)
|
|
else:
|
|
writer.close()
|
|
raise exceptions.SAM_EXCEPTIONS[reply["RESULT"]]()
|
|
|
|
### Context managers
|
|
|
|
class Session:
|
|
"""Async SAM session context manager.
|
|
|
|
:param session_name: Session nick name
|
|
:param sam_address: (optional) SAM API address
|
|
:param loop: (optional) Event loop instance
|
|
:param style: (optional) Session style, can be STREAM, DATAGRAM, RAW
|
|
:param signature_type: (optional) If the destination is TRANSIENT, this
|
|
signature type is used
|
|
:param destination: (optional) Destination to use in this session. Can be
|
|
a base64 encoded string, :class:`Destination`
|
|
instance or None. TRANSIENT destination is used when it
|
|
is None.
|
|
:param options: (optional) A dict object with i2cp options
|
|
:return: :class:`Session` object
|
|
"""
|
|
def __init__(self, session_name, sam_address=sam.DEFAULT_ADDRESS,
|
|
loop=None, style="STREAM",
|
|
signature_type=sam.Destination.default_sig_type,
|
|
destination=None, options={}):
|
|
self.session_name = session_name
|
|
self.sam_address = sam_address
|
|
self.loop = loop
|
|
self.style = style
|
|
self.signature_type = signature_type
|
|
self.destination = destination
|
|
self.options = options
|
|
|
|
async def __aenter__(self):
|
|
self.reader, self.writer = await create_session(self.session_name,
|
|
sam_address=self.sam_address, loop=self.loop, style=self.style,
|
|
signature_type=self.signature_type,
|
|
destination=self.destination, options=self.options)
|
|
return self
|
|
|
|
async def __aexit__(self, exc_type, exc, tb):
|
|
### TODO handle exceptions
|
|
self.writer.close()
|
|
|
|
class StreamConnection:
|
|
"""Async stream connection context manager.
|
|
|
|
:param session_name: Session nick name
|
|
:param destination: I2P destination to connect to
|
|
:param sam_address: (optional) SAM API address
|
|
:param loop: (optional) Event loop instance
|
|
:return: :class:`StreamConnection` object
|
|
"""
|
|
def __init__(self, session_name, destination,
|
|
sam_address=sam.DEFAULT_ADDRESS, loop=None):
|
|
self.session_name = session_name
|
|
self.sam_address = sam_address
|
|
self.loop = loop
|
|
self.destination = destination
|
|
|
|
async def __aenter__(self):
|
|
self.reader, self.writer = await stream_connect(self.session_name,
|
|
self.destination, sam_address=self.sam_address, loop=self.loop)
|
|
self.read = self.reader.read
|
|
self.write = self.writer.write
|
|
return self
|
|
|
|
async def __aexit__(self, exc_type, exc, tb):
|
|
### TODO handle exceptions
|
|
self.writer.close()
|
|
|
|
class StreamAcceptor:
|
|
"""Async stream acceptor context manager.
|
|
|
|
:param session_name: Session nick name
|
|
:param sam_address: (optional) SAM API address
|
|
:param loop: (optional) Event loop instance
|
|
:return: :class:`StreamAcceptor` object
|
|
"""
|
|
def __init__(self, session_name, sam_address=sam.DEFAULT_ADDRESS,
|
|
loop=None):
|
|
self.session_name = session_name
|
|
self.sam_address = sam_address
|
|
self.loop = loop
|
|
|
|
async def __aenter__(self):
|
|
self.reader, self.writer = await stream_accept(self.session_name,
|
|
sam_address=self.sam_address, loop=self.loop)
|
|
self.read = self.reader.read
|
|
self.write = self.writer.write
|
|
return self
|
|
|
|
async def __aexit__(self, exc_type, exc, tb):
|
|
### TODO handle exceptions
|
|
self.writer.close()
|