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import os, sys |
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import socket as s |
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from rsudp import printM, printW, printE |
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import rsudp.raspberryshake as rs |
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6
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class Forward(rs.ConsumerThread): |
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""" |
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Single-destination data forwarding. This consumer reads |
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queue messages from the :class:`rsudp.c_consumer.Consumer` |
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and forwards those messages to a specified address and port. |
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12
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:param str addr: IP address to pass UDP data to |
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:param str port: network port to pass UDP data to (at specified address) |
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:param cha: channel(s) to forward. others will be ignored. |
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:type cha: str or list |
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:param queue.Queue q: queue of data and messages sent by :class:`rsudp.c_consumer.Consumer` |
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""" |
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def __init__(self, addr, port, cha, q): |
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""" |
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Initializes data forwarding module. |
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""" |
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super().__init__() |
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self.sender = 'Forward' |
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self.queue = q |
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self.addr = addr |
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self.port = port |
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self.chans = [] |
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cha = rs.chns if (cha == 'all') else cha |
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cha = list(cha) if isinstance(cha, str) else cha |
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l = rs.chns |
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for c in l: |
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n = 0 |
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for uch in cha: |
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if (uch.upper() in c) and (c not in str(self.chans)): |
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self.chans.append(c) |
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n += 1 |
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if len(self.chans) < 1: |
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self.chans = rs.chns |
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self.running = True |
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self.alive = True |
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printM('Starting.', self.sender) |
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def run(self): |
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""" |
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Gets and distributes queue objects to another address and port on the network. |
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""" |
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printM('Opening socket...', sender=self.sender) |
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socket_type = s.SOCK_DGRAM if os.name in 'nt' else s.SOCK_DGRAM | s.SO_REUSEADDR |
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sock = s.socket(s.AF_INET, socket_type) |
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54
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55
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printM('Forwarding %s data to %s:%s' % (self.chans, self.addr, self.port), |
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sender=self.sender) |
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58
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try: |
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while self.running: |
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p = self.queue.get() # get a packet |
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self.queue.task_done() # close the queue |
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63
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if 'TERM' in str(p): # shutdown if there's a TERM message on the queue |
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self.alive = False |
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printM('Exiting.', self.sender) |
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sys.exit() |
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68
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if rs.getCHN(p) in self.chans: |
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sock.sendto(p, (self.addr, self.port)) |
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70
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71
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except Exception as e: |
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self.alive = False |
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printE('%s' % e, sender=self.sender) |
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sys.exit(2) |
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76
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raspishake /
rsudp
