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78 lines
2.1 KiB
78 lines
2.1 KiB
"""Squeezebox/Logitech Media server discovery."""
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import socket
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from .const import ATTR_HOST, ATTR_PORT
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DISCOVERY_PORT = 3483
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DEFAULT_DISCOVERY_TIMEOUT = 2
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class LMS:
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"""Base class to discover Logitech Media servers."""
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def __init__(self):
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"""Initialize the Logitech discovery."""
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self.entries = []
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self.last_scan = None
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def scan(self):
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"""Scan the network."""
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self.update()
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def all(self):
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"""Scan and return all found entries."""
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self.scan()
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return list(self.entries)
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def update(self):
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"""Scan network for Logitech Media Servers."""
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lms_ip = '<broadcast>'
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lms_port = DISCOVERY_PORT
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lms_msg = b"eJSON\0"
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lms_timeout = DEFAULT_DISCOVERY_TIMEOUT
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entries = []
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
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sock.settimeout(lms_timeout)
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sock.bind(('', 0))
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try:
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sock.sendto(lms_msg, (lms_ip, lms_port))
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while True:
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try:
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data, server = sock.recvfrom(1024)
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if data.startswith(b'E'):
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# Full response is EJSON\xYYXXXX
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# Where YY is length of port string (ie 4)
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# And XXXX is the web interface port (ie 9000)
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port = None
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if data.startswith(b'JSON', 1):
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length = data[5:6][0]
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port = int(data[0-length:])
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entries.append({
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ATTR_HOST: server[0],
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ATTR_PORT: port,
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})
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except socket.timeout:
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break
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finally:
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sock.close()
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self.entries = entries
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def main():
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"""Test LMS discovery."""
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from pprint import pprint
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lms = LMS()
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pprint("Scanning for Logitech Media Servers...")
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lms.update()
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pprint(lms.entries)
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if __name__ == "__main__":
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main()
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