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147 lines
3.8 KiB
147 lines
3.8 KiB
#!/usr/bin/python
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import socket, os, time, select, urllib, sys
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class Meshenger:
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devices = [] #the list of all the nodes this this node has seen
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serve_port = 13338
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announce_port = 13337
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#own_ip = "0.0.0.0"
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msg_dir = os.path.relpath('msg/')
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def __init__(self):
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os.system("echo 1 >> /proc/sys/net/ipv6/conf/br-lan/disable_ipv6")
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self.own_ip = self.get_ip_adress()
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#self.own_ip = "192.168.2.196"
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while True:
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print 'discovering devices'
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time.sleep(1)
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self.discover()
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if len(self.devices) > 0:
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print 'found', len(self.devices),'device(s) retreiving indices'
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for device in self.devices:
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nodepath = self.ip_to_hash(device)
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self.get_index(device, nodepath)
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self.get_messages(device, nodepath)
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print 'updating own index'
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self.build_index()
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time.sleep(5)
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def announce(self):
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"""
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Announce the node's existance to other nodes
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"""
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#announces it's existance to other nodes
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sock = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
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sock.sendto(bericht, ("ff02::1", self.announce_port))
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sock.close()
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def discover(self):
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"""
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Discover other devices by listening to the Meshenger announce port
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"""
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bufferSize = 1024 # whatever you need
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s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
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s.bind(('::', self.announce_port))
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s.setblocking(0)
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#global devices
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while True:
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result = select.select([s],[],[])[0][0].recvfrom(bufferSize)
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if result[1][0] not in self.devices and result[1][0] != self.own_ip:
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self.devices.append(result[1][0])
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return
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time.sleep(1)
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def serve(self):
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a = ''
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# serves both the index and the messages on the node over http
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# plus manages the client-side web interface
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def build_index(self):
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"""
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Make an index file of all the messages present on the node.
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Save the time of the last update.
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"""
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previous_index = []
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current_index = os.listdir(self.msg_dir)
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if current_index != previous_index:
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with open('index', 'wb') as index:
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for message in os.listdir(self.msg_dir):
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index.write(message)
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index.write('\n')
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with open('index_last_update', 'wb') as indexupdate:
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indexupdate.write(str(int(time.time())))
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current_index = previous_index
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def get_index(self,ip, path):
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"""
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Download the indices from other nodes.
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"""
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os.system('wget http://['+ip+'%adhoc0]:13338/index -O '+os.path.join(path,'index'))
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def get_messages(self, ip, path):
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"""
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Get new messages from other node based on it's index file
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"""
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with open(os.path.join(path,'index')) as index:
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index = index.read().split('\n')
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for message in index:
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messagepath = os.path.join(os.path.abspath(self.msg_dir), message)
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if not os.path.exists(messagepath):
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print 'downloading', message, 'to', messagepath
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os.system('wget http://['+ip+'%adhoc0]:13338/msg/'+message+' -O '+messagepath)
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def ip_to_hash(self, ip):
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"""
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Convert a node's ip into a hash and make a directory to store it's files
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"""
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import hashlib
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hasj = hashlib.md5(ip).hexdigest()
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nodepath = os.path.join(os.path.abspath('nodes/'), hasj)
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if not os.path.exists(nodepath):
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os.mkdir(nodepath)
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return nodepath
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def clientsite(self):
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a = ''
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#tools
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def get_ip_adress(self):
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"""
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Hack to adhoc0's inet6 adress
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"""
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if not os.path.isfile('interfaceip6adress'):
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os.system('ifconfig -a adhoc0 | grep inet6 > interfaceip6adress')
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with open('interfaceip6adress', 'r') as a:
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return a.read().split()[2].split('/')[0]
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if __name__ == "__main__":
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print "test"
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meshenger = Meshenger()
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