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Correctly initialize connection to VPCS console

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This commit is contained in:
Julien Duponchelle 2016-11-08 20:10:17 +01:00
parent db8296f548
commit 69f154d9cc
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GPG Key ID: CE8B29639E07F5E8
2 changed files with 37 additions and 21 deletions
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1
gns3server/compute/base_node.py
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@ -332,6 +332,7 @@ class BaseNode:
if not self._wrap_console:
return
(reader, writer) = yield from asyncio.open_connection(host="127.0.0.1", port=self._internal_console_port)
yield from AsyncioTelnetServer.write_client_intro(writer, echo=True)
server = AsyncioTelnetServer(reader=reader, writer=writer, binary=True, echo=True)
self._wrapper_telnet_server = yield from asyncio.start_server(server.run, self._manager.port_manager.console_host, self.console)

57
gns3server/utils/asyncio/telnet_server.py
View File

@ -73,32 +73,48 @@ class AsyncioTelnetServer:
# it's our job (or the wrapped app) to send back the data
self._echo = echo
@staticmethod
@asyncio.coroutine
def write_client_intro(writer, echo=False):
# Send initial telnet session opening
if echo:
writer.write(bytes([IAC, WILL, ECHO]))
else:
writer.write(bytes([
IAC, WONT, ECHO,
IAC, DONT, ECHO]))
yield from writer.drain()
@asyncio.coroutine
def _write_intro(self, writer, binary=False, echo=False):
# Send initial telnet session opening
if echo:
writer.write(bytes([IAC, WILL, ECHO]))
else:
writer.write(bytes([
IAC, WONT, ECHO,
IAC, DONT, ECHO]))
if binary:
writer.write(bytes([
IAC, WILL, SGA,
IAC, WILL, BINARY,
IAC, DO, BINARY]))
else:
writer.write(bytes([
IAC, WONT, SGA,
IAC, DONT, SGA,
IAC, WONT, BINARY,
IAC, DONT, BINARY]))
yield from writer.drain()
@asyncio.coroutine
def run(self, network_reader, network_writer):
# Keep track of connected clients
self._clients.add(network_writer)
try:
# Send initial telnet session opening
if self._echo:
network_writer.write(bytes([IAC, WILL, ECHO]))
else:
network_writer.write(bytes([
IAC, WONT, ECHO,
IAC, DONT, ECHO]))
if self._binary:
network_writer.write(bytes([
IAC, WILL, SGA,
IAC, WILL, BINARY,
IAC, DO, BINARY]))
else:
network_writer.write(bytes([
IAC, WONT, SGA,
IAC, DONT, SGA,
IAC, WONT, BINARY,
IAC, DONT, BINARY]))
yield from network_writer.drain()
yield from self._write_intro(network_writer, echo=self._echo, binary=self._binary)
yield from self._process(network_reader, network_writer)
except ConnectionResetError:
@ -149,7 +165,6 @@ class AsyncioTelnetServer:
return_when=asyncio.FIRST_COMPLETED)
for coro in done:
data = coro.result()
if coro == network_read:
if network_reader.at_eof():
raise ConnectionResetError()