def __init__ (self, rc, msg=None):
"""
Construct an :py:exc:`SCPError` object.
"""
# get a nice custom error message
super (SCPError, self).__init__ (
"command failed with error %s: '%s'" % scamp.rc_to_string (rc))
# save the response code
self.rc = rc
self.rc_text = scamp.rc_to_string (rc)
self.message = msg__author__ = 'stokesa6'
def __init__(self, rc, msg=None):
"""
Construct an :py:exc:`SCPError` object.
"""
# get a nice custom error message
super(SCPError, self).__init__("command failed with error %s: '%s'" %
scamp.rc_to_string(rc))
# save the response code
self.rc = rc
self.rc_text = scamp.rc_to_string(rc)
self.message = msg__author__ = 'stokesa6'
def send_scp_msg(self, msg, retries=10):
"""
Dispatches the given packet and expects a response from the target
machine. Before the packet is sent, the destination co-ordinates and
CPU index are altered to match the values internal to this class.
:param SCPMessage msg: command packet to send to remote host
:returns: :py:class:`SCPMessage` returned from the remote host
:raises: SCPError
"""
# update the message before sending
msg.dst_cpu = self._cpu
msg.dst_x = self._x
msg.dst_y = self._y
# get the response from the remote host
sent_message = False
resp = None
self.next_seq_num()
while not sent_message and retries > 0:
try:
self.send(msg)
resp = self.receive()
if ((resp.cmd_rc != scamp.RC_TIMEOUT)
and (resp.cmd_rc != scamp.RC_P2P_TIMEOUT)
and (resp.cmd_rc != scamp.RC_LEN)):
sent_message = True
else:
logger.debug("Warning - response was {}, retrying".format(
scamp.rc_to_string(resp.cmd_rc)))
if resp.cmd_rc == scamp.RC_TIMEOUT:
self.no_timeout_retries += 1
elif resp.cmd_rc == scamp.RC_P2P_TIMEOUT:
self.no_p2ptimeout_retries += 1
elif resp.cmd_rc == scamp.RC_LEN:
self.no_len_retries += 1
retries -= 1
except socket.timeout as e:
logger.debug("Warning - timeout waiting for response")
retries -= 1
if not sent_message:
raise SCPError(0,
"Failed to receive response after sending message")
# deal with errors by making it someone else's problem!
if resp.cmd_rc != scamp.RC_OK:
raise SCPError(resp.cmd_rc, resp)
else:
return resp
def send_scp_msg (self, msg, retries=10):
"""
Dispatches the given packet and expects a response from the target
machine. Before the packet is sent, the destination co-ordinates and
CPU index are altered to match the values internal to this class.
:param SCPMessage msg: command packet to send to remote host
:returns: :py:class:`SCPMessage` returned from the remote host
:raises: SCPError
"""
# update the message before sending
msg.dst_cpu = self._cpu
msg.dst_x = self._x
msg.dst_y = self._y
# get the response from the remote host
sent_message = False
resp = None
self.next_seq_num()
while not sent_message and retries > 0:
try:
self.send(msg)
resp = self.receive()
if ((resp.cmd_rc != scamp.RC_TIMEOUT)
and (resp.cmd_rc != scamp.RC_P2P_TIMEOUT)
and (resp.cmd_rc != scamp.RC_LEN)):
sent_message = True
else:
logger.debug("Warning - response was {}, retrying".format(
scamp.rc_to_string(resp.cmd_rc)))
if resp.cmd_rc == scamp.RC_TIMEOUT:
self.no_timeout_retries += 1
elif resp.cmd_rc == scamp.RC_P2P_TIMEOUT:
self.no_p2ptimeout_retries += 1
elif resp.cmd_rc == scamp.RC_LEN:
self.no_len_retries += 1
retries -= 1
except socket.timeout as e:
logger.debug("Warning - timeout waiting for response")
retries -= 1
if not sent_message:
raise SCPError(0, "Failed to receive response after sending message")
# deal with errors by making it someone else's problem!
if resp.cmd_rc != scamp.RC_OK:
raise SCPError(resp.cmd_rc, resp)
else:
return resp
