def genPacketOut(parent,
xid=None,
buffer_id=None,
in_port=ofp.OFPP_NONE,
action_ports=[],
pkt=simplePacket()):
"""
Create a packet_out message with genericly usable values
@param parent parent must have logger (Logging object)
@param xid transaction ID used in OpenFlow header
@param buffer_id bufer_id
@param in_port ingress port
@param action_ports a list of output ports
@param pkt a packet to be attached on packet_out
@return packet_out
"""
if xid == None:
xid = genVal32bit()
if buffer_id == None:
buffer_id = 0xffffffff
packet_out = message.packet_out()
packet_out.header.xid = xid
packet_out.buffer_id = buffer_id
packet_out.in_port = in_port
for action_port in action_ports:
act = action.action_output()
act.port = action_port
act.max_len = 0x80
parent.assertTrue(packet_out.actions.add(act), 'Could not add action to msg')
if pkt is not None:
packet_out.data = str(pkt)
return packet_out
def genPacketOut(parent,
xid=None,
buffer_id=None,
in_port=ofp.OFPP_NONE,
action_ports=[],
pkt=simplePacket()):
"""
Create a packet_out message with genericly usable values
@param parent parent must have logger (Logging object)
@param xid transaction ID used in OpenFlow header
@param buffer_id bufer_id
@param in_port ingress port
@param action_ports a list of output ports
@param pkt a packet to be attached on packet_out
@return packet_out
"""
if xid == None:
xid = genVal32bit()
if buffer_id == None:
buffer_id = 0xffffffff
packet_out = message.packet_out()
packet_out.header.xid = xid
packet_out.buffer_id = buffer_id
packet_out.in_port = in_port
for action_port in action_ports:
act = action.action_output()
act.port = action_port
act.max_len = 0x80
parent.assertTrue(packet_out.actions.add(act),
'Could not add action to msg')
if pkt is not None:
packet_out.data = str(pkt)
return packet_out
def genFloModFromPkt(parent,
pkt,
ing_port=ofp.OFPP_NONE,
action_list=None,
wildcards=0,
egr_port=None):
"""
Create a flow_mod message from a packet
The created flow_mod will match on the given packet with given wildcards.
@param parent parent must have logger (Logging object)
@param pkt Parsed and used to construct a flow_mod
@param ing_port ingress port
@param action_list list of actions
@param wildcards Used as a field on match structure
@param egr_port Used for output action
@return flow_mod
"""
logprefix = "FlowMsgCreate: "
match = parse.packet_to_flow_match(pkt)
parent.assertTrue(match is not None, "Flow match from pkt failed")
match.wildcards = wildcards
match.in_port = ing_port
request = message.flow_mod()
request.match = match
request.buffer_id = 0xffffffff
if action_list is not None:
for act in action_list:
parent.logger.debug(logprefix + "Adding action " + act.show())
rv = request.actions.add(act)
parent.assertTrue(rv, "Could not add action" + act.show())
# Set up output/enqueue action if directed
if egr_port is not None:
act = action.action_output()
act.port = egr_port
rv = request.actions.add(act)
parent.assertTrue(rv, "Could not add output action " + str(egr_port))
parent.logger.debug(logprefix + str(request.show()))
return request
def genFloModFromPkt(parent, pkt, ing_port=ofp.OFPP_NONE, action_list=None, wildcards=0,
egr_port=None):
"""
Create a flow_mod message from a packet
The created flow_mod will match on the given packet with given wildcards.
@param parent parent must have logger (Logging object)
@param pkt Parsed and used to construct a flow_mod
@param ing_port ingress port
@param action_list list of actions
@param wildcards Used as a field on match structure
@param egr_port Used for output action
@return flow_mod
"""
logprefix = "FlowMsgCreate: "
match = parse.packet_to_flow_match(pkt)
parent.assertTrue(match is not None, "Flow match from pkt failed")
match.wildcards = wildcards
match.in_port = ing_port
request = message.flow_mod()
request.match = match
request.buffer_id = 0xffffffff
if action_list is not None:
for act in action_list:
parent.logger.debug(logprefix + "Adding action " + act.show())
rv = request.actions.add(act)
parent.assertTrue(rv, "Could not add action" + act.show())
# Set up output/enqueue action if directed
if egr_port is not None:
act = action.action_output()
act.port = egr_port
rv = request.actions.add(act)
parent.assertTrue(rv, "Could not add output action " + str(egr_port))
parent.logger.debug(logprefix + str(request.show()))
return request