def sendNixPacket(self, ofproto, parser, srcSwitch, sdnNix, msg, src_ip, dst_ip, po=True):
actions = []
out_port = 0
first = 1
for curNix in sdnNix:
if curNix[0].dp.id == srcSwitch.dp.id:
# Save the output port from the source switch
out_port = curNix[1]
else:
#self.logger.info ("Switch %s send out port %s", curNix[0].dp.id, curNix[1])
actions.append(parser.OFPActionPushMpls())
actions.append(parser.OFPActionSetField(mpls_ttl=64))
actions.append(parser.OFPActionSetField(mpls_label=curNix[1]))
actions.append(parser.OFPActionOutput(out_port))
inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
match = parser.OFPMatch()
match.append_field(ofproto.OXM_OF_ETH_TYPE, ether_types.ETH_TYPE_IP)
# Hack for GENI since it gives the "wrong" MAC addresses... Will still work fine for ns-3
match.append_field(ofproto.OXM_OF_IPV4_SRC, ip.ipv4_to_int(src_ip), ip.text_to_int("255.255.0.0"))
match.append_field(ofproto.OXM_OF_IPV4_DST, ip.ipv4_to_int(dst_ip), ip.text_to_int("255.255.0.0"))
mod = parser.OFPFlowMod(datapath=srcSwitch.dp, priority=10, table_id=0,
match=match, instructions=inst)
srcSwitch.dp.send_msg(mod)
if po == True:
data = None
if msg.buffer_id == ofproto.OFP_NO_BUFFER:
data = msg.data
out = parser.OFPPacketOut(datapath=srcSwitch.dp, buffer_id=msg.buffer_id,
in_port=msg.match['in_port'],
actions=actions, data=data)
srcSwitch.dp.send_msg(out)
def _same_subnet(self, alpha, bravo, smask):
alpha_int = alpha if type(alpha) == type(
int()) else ip.ipv4_to_int(alpha)
bravo_int = bravo if type(bravo) == type(
int()) else ip.ipv4_to_int(bravo)
smask_int = smask if type(smask) == type(
int()) else ip.ipv4_to_int(smask)
if (alpha_int ^ bravo_int) & smask_int:
print(alpha + ' and ' + bravo + ' are not in the same subnet: ' +
smask)
return (alpha_int ^ bravo_int) & smask_int == 0
def from_inet_ptoi(bgp_id):
"""Convert an IPv4 address string format to a four byte long.
"""
four_byte_id = None
try:
four_byte_id = ip.ipv4_to_int(bgp_id)
except ValueError:
LOG.debug('Invalid bgp id given for conversion to integer value %s',
bgp_id)
return four_byte_id
def from_inet_ptoi(bgp_id):
"""Convert an IPv4 address string format to a four byte long.
"""
four_byte_id = None
try:
four_byte_id = ip.ipv4_to_int(bgp_id)
except ValueError:
LOG.debug('Invalid bgp id given for conversion to integer value %s',
bgp_id)
return four_byte_id
def add_flow(self, datapath, in_port, src_ip, dst_ip, actions, eth):
ofproto = datapath.ofproto
match = datapath.ofproto_parser.OFPMatch(
in_port=in_port,
nw_src=ipv4_to_int(src_ip),
nw_dst=ipv4_to_int(dst_ip),
dl_type=ether_types.ETH_TYPE_IP or ether_types.ETH_TYPE_ARP)
mod = datapath.ofproto_parser.OFPFlowMod(
datapath=datapath,
match=match,
cookie=0,
command=ofproto.OFPFC_ADD,
idle_timeout=0,
hard_timeout=0,
priority=ofproto.OFP_DEFAULT_PRIORITY,
flags=ofproto.OFPFF_SEND_FLOW_REM,
actions=actions)
datapath.send_msg(mod)
def add_flow(self, datapath, in_port, src_ip, dst_ip, actions, eth):
ofproto = datapath.ofproto
match = datapath.ofproto_parser.OFPMatch(
in_port=in_port, nw_src=ipv4_to_int(src_ip), nw_dst=ipv4_to_int(dst_ip), dl_type =
ether_types.ETH_TYPE_IP or ether_types.ETH_TYPE_ARP )
mod = datapath.ofproto_parser.OFPFlowMod(
datapath=datapath, match=match, cookie=0,
command=ofproto.OFPFC_ADD, idle_timeout=0, hard_timeout=0,
priority=ofproto.OFP_DEFAULT_PRIORITY,
flags=ofproto.OFPFF_SEND_FLOW_REM, actions=actions)
datapath.send_msg(mod)
def test_ipv4_to_int(self):
ipv4_str = '10.28.197.1'
val = 169657601
res = ip.ipv4_to_int(ipv4_str)
eq_(val, res)
def test_ipv4_to_int(self):
ipv4_str = '10.28.197.1'
val = 169657601
res = ip.ipv4_to_int(ipv4_str)
eq_(val, res)
def installMplsPath(self, path, src_ip, dst_ip, begin_dp, end_dp,
begin_in_port, end_out_port, pkt_ipv4):
path_size = len(path)
qos_info_dict = self.judge(pkt_ipv4, self.qos_ip_bw_list)
self.logger.info("qos_info_dict: %s", qos_info_dict)
if path_size <= 0:
return
elif path_size == 1:
if begin_dp != end_dp:
return
if qos_info_dict:
queue_id = 1
#a_path = self.spf_path_set[src_ip][dst_ip][bw]
else:
queue_id = 0
#a_path = self.spf_path_set[src_ip][dst_ip]
dpid = path[0]
dp = self.switch_dict[dpid]
match = dp.ofproto_parser.OFPMatch()
match.set_dl_type(ether.ETH_TYPE_IP)
match.set_in_port(begin_in_port)
actions = [
dp.ofproto_parser.OFPActionSetQueue(queue_id=queue_id),
dp.ofproto_parser.OFPActionOutput(end_out_port, 0)
]
self.add_flow(dp, match, actions)
return
else:
# mpls operation
if path[0] != begin_dp:
return
if path[path_size - 1] != end_dp:
return
# first switch -- push mpls label
i = 0
j = 1
dpid = path[i]
dpid_next = path[j]
(prev_port_out,
next_port_in) = self.link_dp2port_table[(dpid, dpid_next)]
if qos_info_dict:
queue_id = 1
else:
queue_id = 0
dp = self.switch_dict[dpid]
match = dp.ofproto_parser.OFPMatch()
match.set_dl_type(ether.ETH_TYPE_IP)
match.set_in_port(begin_in_port)
match.set_ipv4_dst(ip.ipv4_to_int(dst_ip))
label = self.get_avaliable_label()
field = dp.ofproto_parser.OFPMatchField.make(
dp.ofproto.OXM_OF_MPLS_LABEL, int(label))
actions = [
dp.ofproto_parser.OFPActionSetQueue(queue_id=queue_id),
dp.ofproto_parser.OFPActionPushMpls(ether.ETH_TYPE_MPLS),
dp.ofproto_parser.OFPActionSetField(field),
dp.ofproto_parser.OFPActionOutput(prev_port_out.port_no, 0)
]
print "Push Label Number = %s." % label
self.add_flow(dp, match, actions, 0xff)
# mediate switch -- switch mpls label
i = i + 1
j = j + 1
#tmp_label = begin_label
while path[i] != end_dp:
dpid = path[i]
dpid_next = path[j]
(prev_port_out,
next_port_in) = self.link_dp2port_table[(dpid, dpid_next)]
if qos_info_dict:
queue_id = 1
else:
queue_id = 0
dp = self.switch_dict[dpid]
match = dp.ofproto_parser.OFPMatch()
match.set_dl_type(ether.ETH_TYPE_MPLS)
match.set_mpls_label(label)
flabel = self.get_avaliable_label()
field = dp.ofproto_parser.OFPMatchField.make(
dp.ofproto.OXM_OF_MPLS_LABEL, int(label))
#self.forward_label_table[tmp_label] = flabel
actions = [
dp.ofproto_parser.OFPActionSetQueue(queue_id=queue_id),
dp.ofproto_parser.OFPActionPopMpls(ether.ETH_TYPE_IP),
dp.ofproto_parser.OFPActionPushMpls(ether.ETH_TYPE_MPLS),
dp.ofproto_parser.OFPActionSetField(field),
dp.ofproto_parser.OFPActionOutput(prev_port_out.port_no, 0)
]
#print "Swap Label Number = %s -> %s." % (tmp_label, flabel)
print "Swap Label Number = %s -> %s." % (label, label)
self.add_flow(dp, match, actions, 0xff)
#tmp_label = flabel
i = i + 1
j = j + 1
# last switch -- pop mpls label
if qos_info_dict:
queue_id = 1
else:
queue_id = 0
dpid = end_dp
dp = self.switch_dict[dpid]
match = dp.ofproto_parser.OFPMatch()
match.set_dl_type(ether.ETH_TYPE_MPLS)
match.set_mpls_label(label)
actions = [
dp.ofproto_parser.OFPActionSetQueue(queue_id=queue_id),
dp.ofproto_parser.OFPActionPopMpls(ether.ETH_TYPE_IP),
dp.ofproto_parser.OFPActionOutput(end_out_port, 0)
]
print "Pop Label Number = %s." % label
self.add_flow(dp, match, actions, 0xff)
def match(flow, pkt, in_port, ofp, in_phy_port=None):
"""
Args:
flow:
pkt:
in_port:
ofp:
in_phy_port:
Returns:
"""
eth = pkt[0]
vlan = pkt[1]
print flow
if 'in_port' in flow:
if flow['in_port'] != in_port:
return False
if 'in_phy_port' in flow:
if flow['in_phy_port'] != in_phy_port:
return False
if 'eth_dst' in flow:
eth_dst = flow['eth_dst']
if isinstance(eth_dst, tuple):
edst, mask = map(mac.haddr_to_int, eth_dst)
if edst & mask != mac.haddr_to_int(eth.dst) & mask:
return False
else:
if eth_dst != eth.dst:
return False
if 'eth_src' in flow:
eth_src = flow['eth_src']
if isinstance(eth_src, tuple):
esrc, mask = map(mac.haddr_to_int, eth_src)
if esrc & mask != mac.haddr_to_int(eth.src) & mask:
return False
else:
if eth_src != eth.src:
return False
if 'eth_type' in flow:
if flow['eth_type'] != vlan.ethertype:
return False
def test_vid(vid):
if vid == ofp.OFPVID_NONE and vlan.vid:
return False
if vid != vlan.vid | ofp.OFPVID_PRESENT:
return False
return True
if 'vlan_vid' in flow:
vlan_vid = flow['vlan_vid']
if isinstance(vlan_vid, tuple):
vid, mask = vlan_vid
if vid == mask == ofp.OFPVID_PRESENT and not vlan.vid:
return False
else:
test_vid(vid)
else:
vid = vlan_vid
if not test_vid(vid):
return False
if 'vlan_pcp' in flow:
if flow['vlan_pcp'] != vlan.vid:
return False
ip_dscp = None
ip_ecn = None
ip_proto = None
if vlan.ethertype == 0x0800:
ip4 = pkt[2]
tp = pkt[3]
ip_dscp = ip4.tos >> 2
ip_ecn = ip4.tos & 0x03
ip_proto = ip4.proto
if 'ipv4_src' in flow:
ipv4_src = flow['ipv4_src']
if isinstance(ipv4_src, tuple):
ipsrc, mask = map(ip.ipv4_to_int, ipv4_src)
if ipsrc & mask != ip.ipv4_to_int(ip4.src) & mask:
return False
else:
if ipv4_src != ip4.src:
return False
if 'ipv4_dst' in flow:
ipv4_dst = flow['ipv4_dst']
if isinstance(ipv4_dst, tuple):
ipsrc, mask = map(ip.ipv4_to_int, ipv4_dst)
if ipsrc & mask != ip.ipv4_to_int(ip4.dst) & mask:
return False
else:
if ipv4_dst != ip4.dst:
return False
if vlan.ethertype == 0x86dd:
ip6 = pkt[2]
tp = pkt[3]
ip_dscp = ip6.traffic_class >> 2
ip_ecn = ip6.traffic_class & 0x03
ip_proto = ip6.nxt
if 'ipv6_src' in flow:
ipv6_src = flow['ipv6_src']
if isinstance(ipv6_src, tuple):
ipsrc, mask = map(ip.ipv6_to_int, ipv6_src)
if ipsrc & mask != ip.ipv6_to_int(ip6.src) & mask:
return False
else:
if ipv6_src != ip6.src:
return False
if 'ipv6_dst' in flow:
ipv6_dst = flow['ipv64_dst']
if isinstance(ipv6_dst, tuple):
ipsrc, mask = map(ip.ipv6_to_int, ipv6_dst)
if ipsrc & mask != ip.ipv6_to_int(ip6.dst) & mask:
return False
else:
if ipv6_dst != ip6.dst:
return False
if 'ip_dscp' in flow and ip_dscp is not None:
if flow['ip_dscp'] != ip_dscp:
return False
if 'ip_ecn' in flow and ip_ecn is not None:
if flow['ip_ecn'] != ip_ecn:
return False
if 'ip_proto' in flow and ip_proto is not None:
if flow['ip_proto'] != ip_proto:
return False
if ip_proto == 6: # TCP
if 'tcp_src' in flow:
if flow['tcp_src'] != tp.src_port:
return False
if 'tcp_dst' in flow:
if flow['tcp_dst'] != tp.dst_port:
return False
if ip_proto == 17: # UDP
if 'udp_src' in flow:
if flow['udp_src'] != tp.src_port:
return False
if 'udp_dst' in flow:
if flow['udp_dst'] != tp.dst_port:
return False
if ip_proto == 132: # SCTP
if 'sctp_src' in flow:
if flow['sctp_src'] != tp.src_port:
return False
if 'sctp_dst' in flow:
if flow['sctp_dst'] != tp.dst_port:
return False
return True
def match(flow, pkt, in_port, ofp):
eth = pkt[0]
vlan = pkt[1]
if not flow.wildcards & ofp.OFPFW_IN_PORT:
if flow.in_port != in_port:
return False
if not flow.wildcards & ofp.OFPFW_DL_VLAN_PCP:
if flow.dl_vlan_pcp != vlan.pcp:
return False
if not flow.wildcards & ofp.OFPFW_DL_VLAN:
if flow.dl_vlan != vlan.vid:
return False
if not flow.wildcards & ofp.OFPFW_DL_SRC:
if flow.dl_src != addrconv.mac.text_to_bin(eth.src):
return False
if not flow.wildcards & ofp.OFPFW_DL_DST:
if flow.dl_dst != addrconv.mac.text_to_bin(eth.dst):
return False
if not flow.wildcards & ofp.OFPFW_DL_TYPE:
if flow.dl_type != vlan.ethertype:
return False
if vlan.ethertype == 0x0800:
ipp = pkt[2]
tp = pkt[3]
ip_src = ip.ipv4_to_int(ipp.src)
if ip_src != 0:
mask = (flow.wildcards
& ofp.OFPFW_NW_SRC_MASK) >> ofp.OFPFW_NW_SRC_SHIFT
if mask > 32:
mask = 32
mask = (0xffffffff << mask) & 0xffffffff
if ip_src & mask != flow.nw_src & mask:
return False
ip_dst = ip.ipv4_to_int(ipp.dst)
if ip_dst != 0:
mask = (flow.wildcards
& ofp.OFPFW_NW_DST_MASK) >> ofp.OFPFW_NW_DST_SHIFT
if mask > 32:
mask = 32
mask = (0xffffffff << mask) & 0xffffffff
if ip_dst & mask != flow.nw_dst & mask:
return False
if not flow.wildcards & ofp.OFPFW_NW_TOS:
if flow.nw_tos != ipp.tos:
return False
if not flow.wildcards & ofp.OFPFW_NW_PROTO:
if flow.nw_proto != ipp.proto:
return False
if not flow.wildcards & ofp.OFPFW_TP_SRC:
if flow.tp_src != tp.src:
return False
if not flow.wildcards & ofp.OFPFW_TP_DST:
if flow.tp_dst != tp.dst:
return False
return True