def connect(self):
try:
connection = self.makesocket()
if self.spoof_source_address:
try:
# 19 is `IP_TRANSPARENT`, which is only available on Python 3.3+ on some OSes
if not connection.getsockopt(socket.SOL_IP, 19):
connection.setsockopt(socket.SOL_IP, 19, 1)
except socket.error as e:
raise exceptions.TcpException(
"Failed to spoof the source address: " + e.strerror
)
if self.source_address:
connection.bind(self.source_address())
connection.connect(self.address())
self.source_address = Address(connection.getsockname())
except (socket.error, IOError) as err:
raise exceptions.TcpException(
'Error connecting to "%s": %s' %
(self.address.host, err)
)
self.connection = connection
self.ip_address = Address(connection.getpeername())
self._makefile()
return ConnectionCloser(self)
def peek(self, length):
"""
Tries to peek into the underlying file object.
Returns:
Up to the next N bytes if peeking is successful.
Raises:
exceptions.TcpException if there was an error with the socket
TlsException if there was an error with pyOpenSSL.
NotImplementedError if the underlying file object is not a [pyOpenSSL] socket
"""
if isinstance(self.o, socket_fileobject):
try:
return self.o._sock.recv(length, socket.MSG_PEEK)
except socket.error as e:
raise exceptions.TcpException(repr(e))
elif isinstance(self.o, SSL.Connection):
try:
return self.o.recv(length, socket.MSG_PEEK)
except SSL.Error as e:
six.reraise(exceptions.TlsException,
exceptions.TlsException(str(e)),
sys.exc_info()[2])
else:
raise NotImplementedError("Can only peek into (pyOpenSSL) sockets")
def peek(self, length):
"""
Tries to peek into the underlying file object.
Returns:
Up to the next N bytes if peeking is successful.
Raises:
exceptions.TcpException if there was an error with the socket
TlsException if there was an error with pyOpenSSL.
NotImplementedError if the underlying file object is not a [pyOpenSSL] socket
"""
if isinstance(self.o, socket_fileobject):
try:
return self.o._sock.recv(length, socket.MSG_PEEK)
except socket.error as e:
raise exceptions.TcpException(repr(e))
elif isinstance(self.o, SSL.Connection):
try:
if tuple(int(x) for x in OpenSSL.__version__.split(".")[:2]) > (0, 15):
return self.o.recv(length, socket.MSG_PEEK)
else:
# TODO: remove once a new version is released
# Polyfill for pyOpenSSL <= 0.15.1
# Taken from https://github.com/pyca/pyopenssl/commit/1d95dea7fea03c7c0df345a5ea30c12d8a0378d2
buf = SSL._ffi.new("char[]", length)
result = SSL._lib.SSL_peek(self.o._ssl, buf, length)
self.o._raise_ssl_error(self.o._ssl, result)
return SSL._ffi.buffer(buf, result)[:]
except SSL.Error as e:
six.reraise(exceptions.TlsException, exceptions.TlsException(str(e)), sys.exc_info()[2])
else:
raise NotImplementedError("Can only peek into (pyOpenSSL) sockets")
def connect(self):
try:
connection = socket.socket(self.address.family, socket.SOCK_STREAM)
if self.source_address:
connection.bind(self.source_address())
connection.connect(self.address())
self.source_address = Address(connection.getsockname())
except (socket.error, IOError) as err:
raise exceptions.TcpException('Error connecting to "%s": %s' %
(self.address.host, err))
self.connection = connection
self.ip_address = Address(connection.getpeername())
self._makefile()
return ConnectionCloser(self)