f8aed9864d
Max Holtzberg has submitted the ICLA and we can migrate the licenses to Apache. Gregory Nutt has submitted the SGA and we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
84 lines
2.5 KiB
Python
Executable File
84 lines
2.5 KiB
Python
Executable File
#!/usr/bin/env python
|
|
############################################################################
|
|
# tools/discover.py
|
|
#
|
|
# Licensed to the Apache Software Foundation (ASF) under one or more
|
|
# contributor license agreements. See the NOTICE file distributed with
|
|
# this work for additional information regarding copyright ownership. The
|
|
# ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
# "License"); you may not use this file except in compliance with the
|
|
# License. You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
#
|
|
############################################################################
|
|
|
|
import array
|
|
import time
|
|
from socket import *
|
|
|
|
PORT = 96
|
|
|
|
DISCOVER_PROTO_ID = 0x99
|
|
DISCOVER_ALL = 0xff # 0xff means all devices
|
|
DISCOVER_REQUEST = 0x01
|
|
DISCOVER_RESPONSE = 0x02
|
|
DISCOVER_REQUEST_SIZE = 4
|
|
DISCOVER_RESPONSE_SIZE = 35
|
|
|
|
def check_sum(data):
|
|
chksum = 0
|
|
for c in data[:-1]:
|
|
chksum -= c
|
|
return (chksum & 0xff) == data[-1]
|
|
|
|
def send_discover(socket):
|
|
cmd = array.array('B', [0] * DISCOVER_REQUEST_SIZE)
|
|
cmd[0] = DISCOVER_PROTO_ID # Tag for identification of the protocol
|
|
cmd[1] = DISCOVER_REQUEST # Request command
|
|
cmd[2] = DISCOVER_ALL
|
|
chksum = 0
|
|
for c in cmd[:3]:
|
|
chksum -= c
|
|
cmd[3] = chksum & 0xff
|
|
|
|
socket.sendto(cmd, ('<broadcast>', PORT))
|
|
|
|
def read_responses(socket):
|
|
res = []
|
|
response = array.array('B', [0] * DISCOVER_RESPONSE_SIZE)
|
|
try:
|
|
while 1:
|
|
size, src = socket.recvfrom_into(response)
|
|
if (size == DISCOVER_RESPONSE_SIZE
|
|
and response[0] == DISCOVER_PROTO_ID
|
|
and response[1] == DISCOVER_RESPONSE
|
|
and check_sum(response)):
|
|
|
|
dev = {}
|
|
dev['addr'] = src[0]
|
|
dev['descr'] = response[2:-1].tostring().rstrip('\0')
|
|
res.append(dev)
|
|
|
|
except timeout:
|
|
return res
|
|
|
|
if __name__ == '__main__':
|
|
print 'Sending discover...'
|
|
|
|
s = socket(AF_INET, SOCK_DGRAM)
|
|
s.bind(('0.0.0.0', PORT))
|
|
s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)
|
|
s.settimeout(1.0)
|
|
send_discover(s)
|
|
devices = read_responses(s)
|
|
socket.close(s)
|
|
|
|
print devices
|