def send_arp_request(self, datapath, outport_no, dst_ip):
"""
pack and send ARP request for specific IP address.
"""
src_mac_addr = str(
self.switches[datapath.id].ports[outport_no].hw_addr)
src_ip = str(self.switches[datapath.id].ports[outport_no].gateway.ipv4)
dst_ip = str(dst_ip)
p = packet.Packet()
e = ethernet.ethernet(dst=mac.BROADCAST_STR,
src=src_mac_addr,
ethertype=ether.ETH_TYPE_ARP)
p.add_protocol(e)
a = arp.arp_ip(opcode=arp.ARP_REQUEST,
src_mac=src_mac_addr,
src_ip=src_ip,
dst_mac=mac.DONTCARE_STR,
dst_ip=dst_ip)
p.add_protocol(a)
p.serialize()
datapath.send_packet_out(
in_port=ofproto_v1_0.OFPP_NONE,
actions=[datapath.ofproto_parser.OFPActionOutput(outport_no)],
data=p.data)
logger.info('ARP request sent: who has %s? tell %s (dpid=%s)', dst_ip,
src_ip, dpid_lib.dpid_to_str(datapath.id))
def send_arp_request(self, datapath, outport_no, dst_ip):
"""
pack and send ARP request for specific IP address.
"""
logger.info("outport:%s",outport_no)
src_mac_addr = str(self.routers[datapath.id].ports[outport_no].mac_addr)
src_ip = str(self.routers[datapath.id].ports[outport_no].ip_addr)
dst_ip = str(dst_ip)
p = packet.Packet()
e = ethernet.ethernet(dst = mac.BROADCAST_STR,src = src_mac_addr, ethertype = ether.ETH_TYPE_ARP)
a = arp.arp_ip(opcode = arp.ARP_REQUEST, src_mac = src_mac_addr,
src_ip = src_ip, dst_mac = mac.DONTCARE_STR,
dst_ip = dst_ip)
p.add_protocol(e)
p.add_protocol(a)
p.serialize()
actions = [datapath.ofproto_parser.OFPActionOutput(outport_no)]
out = datapath.ofproto_parser.OFPPacketOut(datapath=datapath,
buffer_id=datapath.ofproto.OFP_NO_BUFFER,
in_port=datapath.ofproto.OFPP_CONTROLLER,
actions=actions,
data=p.data)
datapath.send_msg(out)
logger.info('ARP request sent: who has %s? tell %s (dpid=%s)', dst_ip, src_ip, dpid_lib.dpid_to_str(datapath.id))
def runTest(self):
app = App()
# This is from coscin/coscin_app_ryu. Simulates what you get in a PacketIn
src_mac = "00:00:de:ad:be:ef"
dst_mac = "ff:ff:ff:ff:ff:ff"
src_ip = "192.168.56.100"
dst_ip = "192.168.57.100"
e = ethernet.ethernet(dst=dst_mac,
src=src_mac,
ethertype=ether.ETH_TYPE_ARP)
pkt = arp.arp_ip(arp.ARP_REQUEST, src_mac, src_ip, "00:00:00:00:00:00",
dst_ip)
p = packet.Packet()
p.add_protocol(e)
p.add_protocol(pkt)
p.serialize()
payload = NotBuffered(binascii.a2b_base64(binascii.b2a_base64(p.data)))
p_arp = app.packet(payload, "arp")
self.assertEqual(p_arp.src_ip, src_ip)
p_eth = app.packet(payload, "ethernet")
self.assertEqual(p_eth.src, src_mac)
p_icmp = app.packet(payload, "icmp")
self.assertEqual(p_icmp, None)
def _arp(self, dp, port_out, dst_ip):
LOG.debug('Forwarder ' + str(dp.id) + ' ARP searching APN with ' +
str(dst_ip) + ' IP at port ' + str(port_out))
ofp = dp.ofproto
parser = dp.ofproto_parser
pkt = packet.Packet()
str_hex_dpid = str(hex(dp.id)).rstrip('L').lstrip('0x')
#Ak je hex dpid kratsie ako 11 chceme ho zacat '02:'a doplnit nuly
#do celkovej dlzky 12 aby nam z toho nevysla multicastova adresa
if len(str_hex_dpid) < 11:
src_mac = '02'
for i in range(10 - len(str_hex_dpid)):
src_mac += '0'
src_mac += str_hex_dpid
else:
src_mac = dp.id
eth = ethernet.ethernet('ff:ff:ff:ff:ff:ff', '00:13:8f:d4:2c:30',
ether.ETH_TYPE_ARP)
arp_req = arp.arp_ip(1, '00:13:8f:d4:2c:30', DISCOVERY_ARP_IP,
'00:00:00:00:00:00', dst_ip)
pkt = packet.Packet()
pkt.add_protocol(eth)
pkt.add_protocol(arp_req)
pkt.serialize()
actions = [parser.OFPActionOutput(port_out)]
out = parser.OFPPacketOut(datapath=dp,
buffer_id=ofp.OFP_NO_BUFFER,
in_port=ofp.OFPP_CONTROLLER,
actions=actions,
data=pkt.data)
dp.send_msg(out)
def _arp(self, dp, port_out, dst_ip):
LOG.debug('Forwarder '+str(dp.id)+' ARP searching APN with '+str(dst_ip)+' IP at port '+str(port_out))
ofp = dp.ofproto
parser = dp.ofproto_parser
pkt = packet.Packet()
str_hex_dpid = str(hex(dp.id)).rstrip('L').lstrip('0x')
#Ak je hex dpid kratsie ako 11 chceme ho zacat '02:'a doplnit nuly
#do celkovej dlzky 12 aby nam z toho nevysla multicastova adresa
if len(str_hex_dpid) < 11:
src_mac ='02'
for i in range(10-len(str_hex_dpid)):
src_mac += '0'
src_mac += str_hex_dpid
else:
src_mac = dp.id
eth = ethernet.ethernet('ff:ff:ff:ff:ff:ff', '00:13:8f:d4:2c:30', ether.ETH_TYPE_ARP)
arp_req = arp.arp_ip(1, '00:13:8f:d4:2c:30', DISCOVERY_ARP_IP, '00:00:00:00:00:00', dst_ip)
pkt = packet.Packet()
pkt.add_protocol(eth)
pkt.add_protocol(arp_req)
pkt.serialize()
actions=[parser.OFPActionOutput(port_out)]
out=parser.OFPPacketOut(datapath=dp, buffer_id=ofp.OFP_NO_BUFFER, in_port=ofp.OFPP_CONTROLLER, actions=actions, data=pkt.data)
dp.send_msg(out)
def receiveARP(hosts,datapath,pkt,eth_pkt,in_port): arpPKT=pkt.get_protocol(arp) if(arpPKT.opcode==ARP_REQUEST or arpPKT.opcode==ARP_REV_REQUEST): dst=arpPKT.src_ip dstMAC=hosts[dst].mac src=arpPKT.dst_ip srcMAC=hosts[src].mac opcode=0 if(arpPKT.opcode==ARP_REQUEST): opcode=ARP_REPLY else: opcode=ARP_REV_REPLY e=ethernet.ethernet(dstMAC,srcMAC,ether.ETH_TYPE_ARP) a=arp_ip(opcode,srcMAC,src,dstMAC,dst) p=packet.Packet() p.add_protocol(e) p.add_protocol(a) p.serialize() actions=[datapath.ofproto_parser.OFPActionOutput(in_port)] out=datapath.ofproto_parser.OFPPacketOut(datapath=datapath,\ buffer_id=datapath.ofproto.OFP_NO_BUFFER,\ in_port=datapath.ofproto.OFPP_CONTROLLER,\ actions=actions,data=p.data) return out else:return None
def __arp_packet_factory(self, packet_type="query", switch_ip="", dst_mac="", dst_ip="") -> packet.Packet:
'''
A factory for ARP packet.
It customize ARP query/response for different service types
'''
assert packet_type in ("query", "response"), "Not a valid packet type (query/response)"
assert dst_ip, "Both query and response require valid destination IP address"
assert switch_ip, "Must specify the switch IP"
if packet_type == "response":
assert dst_mac, "a response packet should have a valid destination MAC address"
if packet_type == "query":
arp_body = arp.arp_ip(
_ARP_QUERY,
self._switch_mac_address, switch_ip,
'00:00:00:00:00:00', dst_ip
)
ethernet_head = ethernet.ethernet(
src=self._switch_mac_address,
dst="ff:ff:ff:ff:ff:ff",
ethertype=ether.ETH_TYPE_ARP
)
else:
arp_body = arp.arp_ip(
_ARP_RESPONSE,
self._switch_mac_address, switch_ip,
dst_mac, dst_ip
)
ethernet_head = ethernet.ethernet(
src=self._switch_mac_address,
dst=dst_mac,
ethertype=ether.ETH_TYPE_ARP
)
raw_packet = packet.Packet()
raw_packet.add_protocol(ethernet_head)
raw_packet.add_protocol(arp_body)
raw_packet.serialize()
return raw_packet
def send_arp_request(self, switch, src_ip, target_ip):
# It's unclear what the source should be, since the switch has no mac or IP address.
# It just hears all replies and picks out the interesting stuff.
src_mac = self.BOGUS_MAC
dst_mac = "ff:ff:ff:ff:ff:ff"
e = ethernet.ethernet(dst=dst_mac, src=src_mac, ethertype=ether.ETH_TYPE_ARP)
pkt = arp.arp_ip(arp.ARP_REQUEST, src_mac, src_ip, "00:00:00:00:00:00", target_ip)
payload = self.arp_payload(e, pkt)
logging.info("Sending Arp Request to "+target_ip)
# None means the request will go out every available port
self.flood(switch, None, payload)
def create_arp(self, src_mac, src_ip, dst_mac, dst_ip):
eth = ethernet.ethernet(dst_mac, src_mac, ether_types.ETH_TYPE_ARP)
resp = arp.arp_ip(2, src_mac, src_ip , dst_mac, dst_ip)
print "Built ARP response->SrcMAC:", resp.src_mac, " SrcIP:", resp.src_ip, " DstMAC:", resp.dst_mac, " DstIP:", resp.dst_ip
p = packet.Packet()
p.add_protocol(eth)
p.add_protocol(resp)
p.serialize()
return p
def _garp_packet(self, ip_address):
# prepare garp packet
src_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
e = ethernet.ethernet(mac_lib.BROADCAST_STR, src_mac,
ether.ETH_TYPE_ARP)
a = arp.arp_ip(arp.ARP_REQUEST, src_mac, ip_address,
mac_lib.DONTCARE_STR, ip_address)
p = packet.Packet()
p.add_protocol(e)
utils.may_add_vlan(p, self.interface.vlan_id)
p.add_protocol(a)
p.serialize()
return p
def arp_answer_packet(src_mac, src_ip, dst_mac, dst_ip):
pkt = packet.Packet()
eth = ethernet.ethernet(dst=dst_mac,
src=src_mac,
ethertype=ether_types.ETH_TYPE_ARP)
arpp = arp.arp_ip(opcode=arp.ARP_REPLY,
src_mac=src_mac,
src_ip=src_ip,
dst_mac=dst_mac,
dst_ip=dst_ip)
pkt.add_protocol(eth)
pkt.add_protocol(arpp)
pkt.serialize()
return pkt.data
def _garp_packet(self, ip_address):
# prepare garp packet
src_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
e = ethernet.ethernet(mac_lib.BROADCAST_STR, src_mac,
ether.ETH_TYPE_ARP)
a = arp.arp_ip(arp.ARP_REQUEST, src_mac, ip_address,
mac_lib.DONTCARE_STR, ip_address)
p = packet.Packet()
p.add_protocol(e)
utils.may_add_vlan(p, self.interface.vlan_id)
p.add_protocol(a)
p.serialize()
return p
def arp_packet(opcode, src_mac, src_ip, dst_mac, dst_ip):
"""
Generate ARP packet with ethernet encapsulated.
"""
# Generate ethernet header first.
pkt = packet.Packet()
eth_pkt = ethernet.ethernet(dst_mac, src_mac, ETH_TYPE_ARP)
pkt.add_protocol(eth_pkt)
# Use IPv4 ARP wrapper from packet library directly.
arp_pkt = arp.arp_ip(opcode, src_mac, src_ip, dst_mac, dst_ip)
pkt.add_protocol(arp_pkt)
pkt.serialize()
return pkt.data
def arp_packet(opcode, src_mac, src_ip, dst_mac, dst_ip):
"""
Generate ARP packet with ethernet encapsulated.
"""
# Generate ethernet header first.
pkt = packet.Packet()
eth_pkt = ethernet.ethernet(dst_mac, src_mac, ETH_TYPE_ARP)
pkt.add_protocol(eth_pkt)
# Use IPv4 ARP wrapper from packet library directly.
arp_pkt = arp.arp_ip(opcode, src_mac, src_ip, dst_mac, dst_ip)
pkt.add_protocol(arp_pkt)
pkt.serialize()
return pkt.data
def _arp_reply_packet(self, arp_req_sha, arp_req_spa, arp_req_tpa):
if not (arp_req_tpa in self.config.ip_addresses
or arp_req_tpa == self.config.primary_ip_address):
return None
src_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
e = ethernet.ethernet(arp_req_sha, src_mac, ether.ETH_TYPE_ARP)
a = arp.arp_ip(arp.ARP_REPLY, src_mac, arp_req_tpa, arp_req_sha,
arp_req_spa)
p = packet.Packet()
p.add_protocol(e)
utils.may_add_vlan(p, self.interface.vlan_id)
p.add_protocol(a)
p.serialize()
self._transmit(p.data)
def send_arp_reply(dp, port, src_mac, src_ip, target_mac, target_ip):
parser = dp.ofproto_parser
ofproto = dp.ofproto
e = ethernet.ethernet(dst=src_mac, src=target_mac, ethertype=ether.ETH_TYPE_ARP)
# Note for the reply we flip the src and target, as per ARP rules
pkt = arp.arp_ip(arp.ARP_REPLY, target_mac, target_ip, src_mac, src_ip)
p = packet.Packet()
p.add_protocol(e)
p.add_protocol(pkt)
p.serialize()
logging.info("Sending Arp Reply for "+src_ip)
out = parser.OFPPacketOut(datapath=dp, buffer_id=ofproto.OFP_NO_BUFFER,
in_port=port, actions=[ parser.OFPActionOutput(port) ], data=p.data)
dp.send_msg(out)
def _arp_reply_packet(self, arp_req_sha, arp_req_spa, arp_req_tpa):
if not (arp_req_tpa in self.config.ip_addresses or
arp_req_tpa == self.config.primary_ip_address):
return None
src_mac = vrrp.vrrp_ipv4_src_mac_address(self.config.vrid)
e = ethernet.ethernet(arp_req_sha, src_mac, ether.ETH_TYPE_ARP)
a = arp.arp_ip(arp.ARP_REPLY, src_mac, arp_req_tpa,
arp_req_sha, arp_req_spa)
p = packet.Packet()
p.add_protocol(e)
utils.may_add_vlan(p, self.interface.vlan_id)
p.add_protocol(a)
p.serialize()
self._transmit(p.data)
def _send_arp_request(self, datapath, outport_no, dst_ip):
src_mac_addr = \
self.dpid_to_switch[datapath.id].ports[outport_no].hw_addr
src_ip = \
self.dpid_to_switch[datapath.id].ports[outport_no].gateway.gw_ip
p = packet.Packet()
e = ethernet.ethernet(dst = mac.BROADCAST,
src = src_mac_addr, ethertype = ether.ETH_TYPE_ARP)
p.add_protocol(e)
a = arp.arp_ip(opcode = arp.ARP_REQUEST, src_mac = src_mac_addr,
src_ip = src_ip, dst_mac = mac.DONTCARE,
dst_ip = dst_ip)
p.add_protocol(a)
p.serialize()
datapath.send_packet_out(in_port = ofproto_v1_0.OFPP_NONE,
actions = [datapath.ofproto_parser.OFPActionOutput(outport_no)],
data = p.data)
def _arp_send(dp, port_out, arp_code, ip_sender, ip_target, eth_dst='ff:ff:ff:ff:ff:ff',eth_src=None,eth_target='00:00:00:00:00:00'):
"""
Generates arp request and sends it out of 'port_out' of 'dp' forwarder
Keyword arguments:
dp -- Datapath
port_out -- Port on forwarder (dp) used to spit out packet
arp_code -- ARP OP code(1==reques, 2==reply)
ip_sender -- Senders IP addres
eth_dst -- Ethernet destination address (in case of request, broadcast address is used)
eth_src -- Ethernet source address. If none provided, it's generated from Datapath ID of sending forwarder (dp)
eth_target -- Final recipients Ethernet address(in case of request, zeroed out address is used)
ip_target -- Final recipients IP address
"""
ofp = dp.ofproto
parser = dp.ofproto_parser
pkt = packet.Packet()
##If no src_mac was provided we generate one from Datapath ID of forwarder that recieved message
##If Datapath ID starts with zeros we cannot use it as legit MAC address
##Second hex digit must be 2 to indicate localy administered non-multicast address
if eth_src == None:
str_hex_dpid = str(hex(dp.id)).rstrip('L').lstrip('0x')
if len(str_hex_dpid) < 11:
eth_src ='02'
for i in range(10-len(str_hex_dpid)):
eth_src += '0'
eth_src += str_hex_dpid
else:
eth_src = dp.id
eth = ethernet.ethernet(eth_dst, eth_src, ether.ETH_TYPE_ARP)
arp_req = arp.arp_ip(arp_code, eth_src, ip_sender, eth_target, ip_target)
pkt = packet.Packet()
pkt.add_protocol(eth)
pkt.add_protocol(arp_req)
pkt.serialize()
actions=[parser.OFPActionOutput(port_out)]
out=parser.OFPPacketOut(datapath=dp, buffer_id=ofp.OFP_NO_BUFFER, in_port=ofp.OFPP_CONTROLLER, actions=actions, data=pkt.data)
dp.send_msg(out)
def send_arp_request(dp, src_ip, target_ip):
parser = dp.ofproto_parser
ofproto = dp.ofproto
# It's unclear what the source should be, since the switch has no mac or IP address.
# It just hears all replies and picks out the interesting stuff.
src_mac = OpenflowUtils.BOGUS_MAC
dst_mac = "ff:ff:ff:ff:ff:ff"
e = ethernet.ethernet(dst=dst_mac, src=src_mac, ethertype=ether.ETH_TYPE_ARP)
pkt = arp.arp_ip(arp.ARP_REQUEST, src_mac, src_ip, "00:00:00:00:00:00", target_ip)
p = packet.Packet()
p.add_protocol(e)
p.add_protocol(pkt)
p.serialize()
logging.info("Sending Arp Request to "+target_ip)
out = parser.OFPPacketOut(datapath=dp, in_port=2, buffer_id = ofproto.OFP_NO_BUFFER,
actions=[ parser.OFPActionOutput(ofproto.OFPP_ALL) ],
data = p.data
)
dp.send_msg(out)
def _send_arp_request(self, datapath, outport_no, dst_ip):
src_mac_addr = \
self.dpid_to_switch[datapath.id].ports[outport_no].hw_addr
src_ip = \
self.dpid_to_switch[datapath.id].ports[outport_no].gateway.gw_ip
p = packet.Packet()
e = ethernet.ethernet(dst=mac.BROADCAST,
src=src_mac_addr,
ethertype=ether.ETH_TYPE_ARP)
p.add_protocol(e)
a = arp.arp_ip(opcode=arp.ARP_REQUEST,
src_mac=src_mac_addr,
src_ip=src_ip,
dst_mac=mac.DONTCARE,
dst_ip=dst_ip)
p.add_protocol(a)
p.serialize()
datapath.send_packet_out(
in_port=ofproto_v1_0.OFPP_NONE,
actions=[datapath.ofproto_parser.OFPActionOutput(outport_no)],
data=p.data)
def send_arp_request(self, datapath, outport_no, dst_ip):
"""
pack and send ARP request for specific IP address.
"""
src_mac_addr = str(self.switches[datapath.id].ports[outport_no].hw_addr)
src_ip = str(self.switches[datapath.id].ports[outport_no].gateway.ipv4)
dst_ip = str(dst_ip)
p = packet.Packet()
e = ethernet.ethernet(dst = mac.BROADCAST_STR,
src = src_mac_addr, ethertype = ether.ETH_TYPE_ARP)
p.add_protocol(e)
a = arp.arp_ip(opcode = arp.ARP_REQUEST, src_mac = src_mac_addr,
src_ip = src_ip, dst_mac = mac.DONTCARE_STR,
dst_ip = dst_ip)
p.add_protocol(a)
p.serialize()
datapath.send_packet_out(in_port = ofproto_v1_0.OFPP_NONE,
actions = [datapath.ofproto_parser.OFPActionOutput(outport_no)],
data = p.data)
logger.info('ARP request sent: who has %s? tell %s (dpid=%s)', dst_ip, src_ip, dpid_lib.dpid_to_str(datapath.id))
def runTest(self):
app = App()
# This is from coscin/coscin_app_ryu. Simulates what you get in a PacketIn
src_mac = "00:00:de:ad:be:ef"
dst_mac = "ff:ff:ff:ff:ff:ff"
src_ip = "192.168.56.100"
dst_ip = "192.168.57.100"
e = ethernet.ethernet(dst=dst_mac, src=src_mac, ethertype=ether.ETH_TYPE_ARP)
pkt = arp.arp_ip(arp.ARP_REQUEST, src_mac, src_ip, "00:00:00:00:00:00", dst_ip)
p = packet.Packet()
p.add_protocol(e)
p.add_protocol(pkt)
p.serialize()
payload = NotBuffered(binascii.a2b_base64(binascii.b2a_base64(p.data)))
p_arp = app.packet(payload, "arp")
self.assertEqual(p_arp.src_ip, src_ip)
p_eth = app.packet(payload, "ethernet")
self.assertEqual(p_eth.src, src_mac)
p_icmp = app.packet(payload, "icmp")
self.assertEqual(p_icmp, None)
def _packet_in(self, ev):
dp = ev.msg.datapath
ofp = dp.ofproto
parser = dp.ofproto_parser
match = ev.msg.match
if (match['eth_type'] == 0x0800
and match['ip_proto'] == inet.IPPROTO_UDP
and match['udp_dst'] == VGSN_PORT
and match['sndcp_first_segment'] == 1
and match['sndcp_more_segments'] == 1):
self._ping(dp,
match['in_port'],
SNDCP_FRAG_WARNING_SRC_IP,
match['ipv4_src'],
match['eth_dst'],
match['eth_src'],
icmp_type=3,
icmp_code=4)
LOG.warning('WARNING: Device with IP: ' + match['ipv4_src'] +
' sent fragmented sndcp packet')
if match['eth_type'] == 0x0806 and match['arp_op'] == 1:
LOG.debug("prisiel nam ARP request... ")
str_hex_dpid = str(hex(dp.id)).rstrip('L').lstrip('0x')
#Ak je hex dpid kratsie ako 11 chceme ho zacat '02:'a doplnit nuly
#do celkovej dlzky 12 aby nam z toho nevysla multicastova adresa
if len(str_hex_dpid) < 11:
reply_mac = '02'
for i in range(10 - len(str_hex_dpid)):
reply_mac += '0'
reply_mac += str_hex_dpid
else:
reply_mac = dp.id
LOG.debug('Odpovedam s src_mac: ' + reply_mac)
eth = ethernet.ethernet(match['arp_sha'], reply_mac,
ether.ETH_TYPE_ARP)
arp_reply = arp.arp_ip(2, reply_mac, match['arp_tpa'],
match['arp_sha'], match['arp_spa'])
LOG.debug(" arp_reply=" + pprint.pformat(arp_reply))
pkt = packet.Packet()
pkt.add_protocol(eth)
pkt.add_protocol(arp_reply)
pkt.serialize()
actions = [parser.OFPActionOutput(match['in_port'])]
out = parser.OFPPacketOut(datapath=dp,
buffer_id=ofp.OFP_NO_BUFFER,
in_port=ofp.OFPP_CONTROLLER,
actions=actions,
data=pkt.data)
dp.send_msg(out)
if match['eth_type'] == 0x0806 and match['arp_op'] == 2 and match[
'arp_tpa'] == DISCOVERY_ARP_IP:
pkt = packet.Packet(array.array('B', ev.msg.data))
arp_data = ''
for p in pkt:
if p.protocol_name == 'arp':
arp_data = p
apn_ip = arp_data.src_ip
apn_name = ''
dp = ev.msg.datapath.id
port = match['in_port']
for apn in APN_POOL.keys():
if APN_POOL.get(apn) == apn_ip:
apn_name = apn
break
topo.add_link(dp, str(apn_name), port)
topo.add_link(str(apn_name), dp, 0)
topo.reload_topology()
LOG.debug('APN ' + str(apn_name) + ' found at forwarder ' +
str(dp) + ' at port ' + str(port))
if match['eth_type'] == 0x0800 and match[
'ipv4_dst'] == DISCOVERY_IP_DST and match['ip_proto'] == 1:
neighbourDPID = self._get_icmp_data(
packet.Packet(array.array('B', ev.msg.data)), 'dpid')
neighbourPort = self._get_icmp_data(
packet.Packet(array.array('B', ev.msg.data)), 'port_out')
#print('Som',ev.msg.datapath.id,
# ', dostal som spravu na porte: ',ev.msg.match['in_port'],
# ' od cisla:',neighbourDPID,
# ' ktory ma ma pripojeneho na porte',neighbourPort)
topo.add_link(ev.msg.datapath.id, neighbourDPID,
ev.msg.match['in_port'])
topo.add_link(neighbourDPID, ev.msg.datapath.id, neighbourPort)
topo.reload_topology()
LOG.debug('Topology changed: link between ' +
str(ev.msg.datapath.id) + ' and ' + str(neighbourDPID) +
' is up.')
def _packet_in(self, ev):
dp = ev.msg.datapath
ofp = dp.ofproto
parser = dp.ofproto_parser
match = ev.msg.match
if (match['eth_type'] == 0x0800 and match['ip_proto'] == inet.IPPROTO_UDP
and match['udp_dst'] == VGSN_PORT and match['sndcp_first_segment'] == 1
and match['sndcp_more_segments'] == 1):
self._ping(dp,match['in_port'],SNDCP_FRAG_WARNING_SRC_IP,match['ipv4_src'],match['eth_dst'],match['eth_src'],icmp_type=3,icmp_code=4)
LOG.warning('WARNING: Device with IP: '+match['ipv4_src']+' sent fragmented sndcp packet')
if match['eth_type'] == 0x0806 and match['arp_op'] == 1:
LOG.debug("prisiel nam ARP request... ")
str_hex_dpid = str(hex(dp.id)).rstrip('L').lstrip('0x')
#Ak je hex dpid kratsie ako 11 chceme ho zacat '02:'a doplnit nuly
#do celkovej dlzky 12 aby nam z toho nevysla multicastova adresa
if len(str_hex_dpid) < 11:
reply_mac ='02'
for i in range(10-len(str_hex_dpid)):
reply_mac += '0'
reply_mac += str_hex_dpid
else:
reply_mac = dp.id
LOG.debug('Odpovedam s src_mac: '+reply_mac)
eth = ethernet.ethernet(match['arp_sha'], reply_mac, ether.ETH_TYPE_ARP)
arp_reply = arp.arp_ip(2, reply_mac, match['arp_tpa'], match['arp_sha'], match['arp_spa'])
LOG.debug(" arp_reply="+pprint.pformat(arp_reply))
pkt = packet.Packet()
pkt.add_protocol(eth)
pkt.add_protocol(arp_reply)
pkt.serialize()
actions=[parser.OFPActionOutput(match['in_port'])]
out=parser.OFPPacketOut(datapath=dp, buffer_id=ofp.OFP_NO_BUFFER, in_port=ofp.OFPP_CONTROLLER, actions=actions, data=pkt.data)
dp.send_msg(out)
if match['eth_type'] == 0x0806 and match['arp_op'] == 2 and match['arp_tpa'] == DISCOVERY_ARP_IP:
pkt = packet.Packet(array.array('B', ev.msg.data))
arp_data=''
for p in pkt:
if p.protocol_name == 'arp':
arp_data = p
apn_ip = arp_data.src_ip
apn_name = ''
dp = ev.msg.datapath.id
port = match['in_port']
for apn in APN_POOL.keys():
if APN_POOL.get(apn) == apn_ip:
apn_name = apn
break
topo.add_link(dp,str(apn_name),port)
topo.add_link(str(apn_name),dp,0)
topo.reload_topology()
LOG.debug('APN '+str(apn_name)+' found at forwarder '+str(dp)+' at port '+str(port))
if match['eth_type'] == 0x0800 and match['ipv4_dst'] == DISCOVERY_IP_DST and match['ip_proto'] == 1:
neighbourDPID=self._get_icmp_data(packet.Packet(array.array('B', ev.msg.data)),'dpid')
neighbourPort=self._get_icmp_data(packet.Packet(array.array('B', ev.msg.data)),'port_out')
#print('Som',ev.msg.datapath.id,
# ', dostal som spravu na porte: ',ev.msg.match['in_port'],
# ' od cisla:',neighbourDPID,
# ' ktory ma ma pripojeneho na porte',neighbourPort)
topo.add_link(ev.msg.datapath.id, neighbourDPID, ev.msg.match['in_port'])
topo.add_link(neighbourDPID, ev.msg.datapath.id, neighbourPort )
topo.reload_topology()
LOG.debug('Topology changed: link between '+str(ev.msg.datapath.id)+' and '+str(neighbourDPID)+' is up.')
def arp_reply(self, switch, port, src_mac, src_ip, target_mac, target_ip): e = ethernet.ethernet(dst=src_mac, src=target_mac, ethertype=ether.ETH_TYPE_ARP) # Note for the reply we flip the src and target, as per ARP rules pkt = arp.arp_ip(arp.ARP_REPLY, target_mac, target_ip, src_mac, src_ip) payload = self.main_app.arp_payload(e, pkt) self.main_app.pkt_out(self.nib.switch_to_dpid(switch), payload, [Output(Physical(port))])
