def test_ipv6AddrString2Bytes(logFixture, validIpv6AddrStr2Bytes):
(ipv6String,ipv6Bytes) = validIpv6AddrStr2Bytes
ipv6Bytes = list(ipv6Bytes)
log.debug('ipv6String: {0}'.format(ipv6String))
log.debug('ipv6Bytes: {0}'.format(coapUtils.formatBuf(ipv6Bytes)))
result = coapUtils.ipv6AddrString2Bytes(ipv6String)
log.debug('result: {0}'.format(coapUtils.formatBuf(result)))
assert result==ipv6Bytes
def test_ipv6AddrString2Bytes(logFixture, validIpv6AddrStr2Bytes):
(ipv6String, ipv6Bytes) = validIpv6AddrStr2Bytes
ipv6Bytes = list(ipv6Bytes)
log.debug('ipv6String: {0}'.format(ipv6String))
log.debug('ipv6Bytes: {0}'.format(coapUtils.formatBuf(ipv6Bytes)))
result = coapUtils.ipv6AddrString2Bytes(ipv6String)
log.debug('result: {0}'.format(coapUtils.formatBuf(result)))
assert result == ipv6Bytes
def _receiveFromCoAP(self, timestamp, sender, data):
'''
Receive CoAP response and forward it to the mesh network.
Appends UDP and IPv6 headers to the CoAP message and forwards it on the Eventbus towards the mesh.
'''
self.coapClient.close()
# UDP
udplen = len(data) + 8
udp = u.int2buf(self.coapClient.udpPort,2) # src port
udp += u.int2buf(sender[1],2) # dest port
udp += [udplen >> 8, udplen & 0xff] # length
udp += [0x00, 0x00] # checksum
udp += data
# destination address of the packet is CoAP client's IPv6 address (address of the mote)
dstIpv6Address = u.ipv6AddrString2Bytes(self.coapClient.ipAddress)
assert len(dstIpv6Address)==16
# source address of the packet is DAG root's IPV6 address
# use the same prefix (link-local or global) as in the destination address
srcIpv6Address = dstIpv6Address[:8]
srcIpv6Address += self.dagRootEui64
assert len(srcIpv6Address)==16
# CRC See https://tools.ietf.org/html/rfc2460.
udp[6:8] = openvisualizer.openvisualizer_utils.calculatePseudoHeaderCRC(
src=srcIpv6Address,
dst=dstIpv6Address,
length=[0x00, 0x00] + udp[4:6],
nh=[0x00, 0x00, 0x00, 17], # UDP as next header
payload=data,
)
# IPv6
ip = [6 << 4] # v6 + traffic class (upper nybble)
ip += [0x00, 0x00, 0x00] # traffic class (lower nibble) + flow label
ip += udp[4:6] # payload length
ip += [17] # next header (protocol); UDP=17
ip += [64] # hop limit (pick a safe value)
ip += srcIpv6Address # source
ip += dstIpv6Address # destination
ip += udp
# announce network prefix
self.dispatch(
signal = 'v6ToMesh',
data = ip
)
def _messageNotification(self, signal, sender, data):
timestamp = time.time()
# log
log.debug("{0}:{1}->{2}:{3}: {4}".format(
sender[0],
sender[1],
signal[0],
signal[1],
u.formatBuf(data),
))
srcIp = u.ipv6AddrString2Bytes(sender[0])
srcPort = sender[1]
destIp = u.ipv6AddrString2Bytes(signal[0])
destPort = signal[1]
# log in pcap
self._writePcapMessage(timestamp, srcIp, destIp, srcPort, destPort,
data)
# release the lock
self.gotMsgSem.release()
def _messageNotification(self,signal,sender,data):
timestamp = time.time()
# log
log.debug("{0}:{1}->{2}:{3}: {4}".format(
sender[0],
sender[1],
signal[0],
signal[1],
u.formatBuf(data),
)
)
srcIp = u.ipv6AddrString2Bytes(sender[0])
srcPort = sender[1]
destIp = u.ipv6AddrString2Bytes(signal[0])
destPort = signal[1]
# log in pcap
self._writePcapMessage(timestamp,srcIp,destIp,srcPort,destPort,data)
# release the lock
self.gotMsgSem.release()
def _receiveFromCoAP(self, timestamp, sender, data):
'''
Receive CoAP response and forward it to the mesh network.
Appends UDP and IPv6 headers to the CoAP message and forwards it on the Eventbus towards the mesh.
'''
self.coapClient.close()
# UDP
udplen = len(data) + 8
udp = u.int2buf(sender[1], 2) # src port
udp += u.int2buf(self.coapClient.udpPort, 2) # dest port
udp += [udplen >> 8, udplen & 0xff] # length
udp += [0x00, 0x00] # checksum
udp += data
# destination address of the packet is CoAP client's IPv6 address (address of the mote)
dstIpv6Address = u.ipv6AddrString2Bytes(self.coapClient.ipAddress)
assert len(dstIpv6Address) == 16
# source address of the packet is DAG root's IPV6 address
# use the same prefix (link-local or global) as in the destination address
srcIpv6Address = dstIpv6Address[:8]
srcIpv6Address += self.dagRootEui64
assert len(srcIpv6Address) == 16
# CRC See https://tools.ietf.org/html/rfc2460.
udp[6:
8] = openvisualizer.openvisualizer_utils.calculatePseudoHeaderCRC(
src=srcIpv6Address,
dst=dstIpv6Address,
length=[0x00, 0x00] + udp[4:6],
nh=[0x00, 0x00, 0x00, 17], # UDP as next header
payload=udp,
)
# IPv6
ip = [6 << 4] # v6 + traffic class (upper nybble)
ip += [0x00, 0x00, 0x00] # traffic class (lower nibble) + flow label
ip += udp[4:6] # payload length
ip += [17] # next header (protocol); UDP=17
ip += [64] # hop limit (pick a safe value)
ip += srcIpv6Address # source
ip += dstIpv6Address # destination
ip += udp
# announce network prefix
self.dispatch(signal='v6ToMesh', data=ip)
def ipv6ToHexArray(ipv6):
return coapUtils.ipv6AddrString2Bytes(ipv6)
