def packet_in_handler(self, ev):
msg = ev.msg
datapath = msg.datapath
ofproto = datapath.ofproto
dst, src, _eth_type = struct.unpack_from('!6s6sH', buffer(msg.data), 0)
dpid = datapath.id
self.mac_to_port.setdefault(dpid, {})
self.logger.debug("packet in %s %s %s %s", dpid, haddr_to_str(src),
haddr_to_str(dst), msg.in_port)
# learn a mac address to avoid FLOOD next time.
self.mac_to_port[dpid][src] = msg.in_port
if dst in self.mac_to_port[dpid]:
out_port = self.mac_to_port[dpid][dst]
else:
out_port = ofproto.OFPP_FLOOD
actions = [datapath.ofproto_parser.OFPActionOutput(out_port)]
# install a flow to avoid packet_in next time
if out_port != ofproto.OFPP_FLOOD:
self.add_flow(datapath, msg.in_port, dst, actions)
out = datapath.ofproto_parser.OFPPacketOut(datapath=datapath,
buffer_id=msg.buffer_id,
in_port=msg.in_port,
actions=actions)
datapath.send_msg(out)
def packet_in_handler(self, ev):
msg = ev.msg
dst, src, eth_type = struct.unpack_from('!6s6sH', buffer(msg.data), 0)
in_port = msg.match.fields[0].value
LOG.info("----------------------------------------")
LOG.info("* PacketIn")
LOG.info("in_port=%d, eth_type: %s", in_port, hex(eth_type))
LOG.info("packet reason=%d buffer_id=%d", msg.reason, msg.buffer_id)
LOG.info("packet in datapath_id=%s src=%s dst=%s", msg.datapath.id,
haddr_to_str(src), haddr_to_str(dst))
def to_rest(openflow):
LOG.info('%s(): caller(): %s', log_utils.get_fname(1),
log_utils.get_fname(2))
of_match = openflow[REST_MATCH]
mac_dontcare = mac.haddr_to_str(mac.DONTCARE)
ip_dontcare = '0.0.0.0'
ipv6_dontcare = '::'
match = {}
for key, value in of_match.items():
if key == REST_SRC_MAC or key == REST_DST_MAC:
if value == mac_dontcare:
continue
elif key == REST_SRC_IP or key == REST_DST_IP:
if value == ip_dontcare:
continue
elif key == REST_SRC_IPV6 or key == REST_DST_IPV6:
if value == ipv6_dontcare:
continue
elif value == 0:
continue
if key in Match._CONVERT:
conv = Match._CONVERT[key]
conv = dict((value, key) for key, value in conv.items())
match.setdefault(key, conv[value])
else:
match.setdefault(key, value)
return match
def actions_to_str(acts):
actions = []
for a in acts:
action_type = a.cls_action_type
if action_type == ofproto_v1_0.OFPAT_OUTPUT:
port = UTIL.ofp_port_to_user(a.port)
buf = 'OUTPUT:' + str(port)
elif action_type == ofproto_v1_0.OFPAT_SET_VLAN_VID:
buf = 'SET_VLAN_VID:' + str(a.vlan_vid)
elif action_type == ofproto_v1_0.OFPAT_SET_VLAN_PCP:
buf = 'SET_VLAN_PCP:' + str(a.vlan_pcp)
elif action_type == ofproto_v1_0.OFPAT_STRIP_VLAN:
buf = 'STRIP_VLAN'
elif action_type == ofproto_v1_0.OFPAT_SET_DL_SRC:
buf = 'SET_DL_SRC:' + haddr_to_str(a.dl_addr)
elif action_type == ofproto_v1_0.OFPAT_SET_DL_DST:
buf = 'SET_DL_DST:' + haddr_to_str(a.dl_addr)
elif action_type == ofproto_v1_0.OFPAT_SET_NW_SRC:
buf = 'SET_NW_SRC:' + \
socket.inet_ntoa(struct.pack('!I', a.nw_addr))
elif action_type == ofproto_v1_0.OFPAT_SET_NW_DST:
buf = 'SET_NW_DST:' + \
socket.inet_ntoa(struct.pack('!I', a.nw_addr))
elif action_type == ofproto_v1_0.OFPAT_SET_NW_TOS:
buf = 'SET_NW_TOS:' + str(a.tos)
elif action_type == ofproto_v1_0.OFPAT_SET_TP_SRC:
buf = 'SET_TP_SRC:' + str(a.tp)
elif action_type == ofproto_v1_0.OFPAT_SET_TP_DST:
buf = 'SET_TP_DST:' + str(a.tp)
elif action_type == ofproto_v1_0.OFPAT_ENQUEUE:
port = UTIL.ofp_port_to_user(a.port)
queue = UTIL.ofp_queue_to_user(a.queue_id)
buf = 'ENQUEUE:' + str(port) + ":" + str(queue)
elif action_type == ofproto_v1_0.OFPAT_VENDOR:
buf = 'VENDOR'
else:
buf = 'UNKNOWN'
actions.append(buf)
return actions
def match_to_str(m):
match = {}
if ~m.wildcards & ofproto_v1_0.OFPFW_IN_PORT:
match['in_port'] = UTIL.ofp_port_to_user(m.in_port)
if ~m.wildcards & ofproto_v1_0.OFPFW_DL_SRC:
match['dl_src'] = haddr_to_str(m.dl_src)
if ~m.wildcards & ofproto_v1_0.OFPFW_DL_DST:
match['dl_dst'] = haddr_to_str(m.dl_dst)
if ~m.wildcards & ofproto_v1_0.OFPFW_DL_VLAN:
match['dl_vlan'] = m.dl_vlan
if ~m.wildcards & ofproto_v1_0.OFPFW_DL_VLAN_PCP:
match['dl_vlan_pcp'] = m.dl_vlan_pcp
if ~m.wildcards & ofproto_v1_0.OFPFW_DL_TYPE:
match['dl_type'] = m.dl_type
if ~m.wildcards & ofproto_v1_0.OFPFW_NW_TOS:
match['nw_tos'] = m.nw_tos
if ~m.wildcards & ofproto_v1_0.OFPFW_NW_PROTO:
match['nw_proto'] = m.nw_proto
if ~m.wildcards & ofproto_v1_0.OFPFW_NW_SRC_ALL:
match['nw_src'] = nw_src_to_str(m.wildcards, m.nw_src)
if ~m.wildcards & ofproto_v1_0.OFPFW_NW_DST_ALL:
match['nw_dst'] = nw_dst_to_str(m.wildcards, m.nw_dst)
if ~m.wildcards & ofproto_v1_0.OFPFW_TP_SRC:
match['tp_src'] = m.tp_src
if ~m.wildcards & ofproto_v1_0.OFPFW_TP_DST:
match['tp_dst'] = m.tp_dst
return match
def add_mac(self, mac, nw_id, nw_id_external=None):
_nw_id = self.mac_to_net.get(mac)
if _nw_id == nw_id:
return
# allow changing from nw_id_external to known nw id
if _nw_id is None or _nw_id == nw_id_external:
self.mac_to_net[mac] = nw_id
LOG.debug('overwrite nw_id: mac %s nw old %s new %s',
haddr_to_str(mac), _nw_id, nw_id)
return
if nw_id == nw_id_external:
# this can happens when the packet traverses
# VM-> tap-> ovs-> ext-port-> wire-> ext-port-> ovs-> tap-> VM
return
LOG.warning('duplicated nw_id: mac %s nw old %s new %s',
haddr_to_str(mac), _nw_id, nw_id)
raise MacAddressDuplicated(mac=mac)
def port_add(self, dpid, port, mac):
"""
:returns: old port if learned. (this may be = port)
None otherwise
"""
old_port = self.mac_to_port[dpid].get(mac, None)
self.mac_to_port[dpid][mac] = port
if old_port is not None and old_port != port:
LOG.debug('port_add: 0x%016x 0x%04x %s',
dpid, port, haddr_to_str(mac))
return old_port
def to_mod_openflow(of_match):
mac_dontcare = mac.haddr_to_str(mac.DONTCARE)
ip_dontcare = '0.0.0.0'
ipv6_dontcare = '::'
match = {}
for key, value in of_match.items():
if key == REST_SRC_MAC or key == REST_DST_MAC:
if value == mac_dontcare:
continue
elif key == REST_SRC_IP or key == REST_DST_IP:
if value == ip_dontcare:
continue
elif key == REST_SRC_IPV6 or key == REST_DST_IPV6:
if value == ipv6_dontcare:
continue
elif value == 0:
continue
match.setdefault(key, value)
return match
def to_mod_openflow(of_match):
LOG.info('%s(): caller(): %s', log_utils.get_fname(1),
log_utils.get_fname(2))
mac_dontcare = mac.haddr_to_str(mac.DONTCARE)
ip_dontcare = '0.0.0.0'
ipv6_dontcare = '::'
match = {}
for key, value in of_match.items():
if key == REST_SRC_MAC or key == REST_DST_MAC:
if value == mac_dontcare:
continue
elif key == REST_SRC_IP or key == REST_DST_IP:
if value == ip_dontcare:
continue
elif key == REST_SRC_IPV6 or key == REST_DST_IPV6:
if value == ipv6_dontcare:
continue
elif value == 0:
continue
match.setdefault(key, value)
return match
def haddr_to_str(self, addr):
return mac.haddr_to_str(addr)
