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fix a potential RST problem

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This commit is contained in:
clowwindy 2014-05-10 01:22:26 +08:00
parent 289467923b
commit 6caeabd03d
2 changed files with 32 additions and 16 deletions
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24
shadowsocks/local.py
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@ -100,6 +100,7 @@ class Socks5Server(SocketServer.StreamRequestHandler):
else:
fdset = [sock, remote]
while True:
should_break = False
r, w, e = select.select(fdset, [], [])
if sock in r:
if not connected and config_fast_open:
@ -123,18 +124,25 @@ class Socks5Server(SocketServer.StreamRequestHandler):
pending_data = None
data = encryptor.encrypt(data)
if len(data) <= 0:
break
result = send_all(remote, data)
if result < len(data):
raise Exception('failed to send all data')
should_break = True
else:
result = send_all(remote, data)
if result < len(data):
raise Exception('failed to send all data')
if remote in r:
data = encryptor.decrypt(remote.recv(4096))
if len(data) <= 0:
break
result = send_all(sock, data)
if result < len(data):
raise Exception('failed to send all data')
should_break = True
else:
result = send_all(sock, data)
if result < len(data):
raise Exception('failed to send all data')
if should_break:
# make sure all data are read before we close the sockets
# TODO: we haven't read ALL the data, actually
# http://cs.ecs.baylor.edu/~donahoo/practical/CSockets/TCPRST.pdf
break
finally:
sock.close()
remote.close()

24
shadowsocks/server.py
View file

@ -79,21 +79,29 @@ class Socks5Server(SocketServer.StreamRequestHandler):
try:
fdset = [sock, remote]
while True:
should_break = False
r, w, e = select.select(fdset, [], [])
if sock in r:
data = self.decrypt(sock.recv(4096))
if len(data) <= 0:
break
result = send_all(remote, data)
if result < len(data):
raise Exception('failed to send all data')
should_break = True
else:
result = send_all(remote, data)
if result < len(data):
raise Exception('failed to send all data')
if remote in r:
data = self.encrypt(remote.recv(4096))
if len(data) <= 0:
break
result = send_all(sock, data)
if result < len(data):
raise Exception('failed to send all data')
should_break = True
else:
result = send_all(sock, data)
if result < len(data):
raise Exception('failed to send all data')
if should_break:
# make sure all data are read before we close the sockets
# TODO: we haven't read ALL the data, actually
# http://cs.ecs.baylor.edu/~donahoo/practical/CSockets/TCPRST.pdf
break
finally:
sock.close()