Hello everyone,
In my application I want to match destination address while adding flows. I am
using OFP1.3. The main problem is when I match the destination ip I used
match = datapath.ofproto_parser.OFPMatch(
dl_dst=ipv4_to_bin(dst))
Here this dl_dst creates problem because it is not a valid parameter of
OFPMatch may be. But I do not know what should I do to match the ipv4 address.
Can anyone please tell me what should I write in the match field to match
destination ip in OFP1.3 ? Detailed explanation of my problem is given
below(notice only the bold sections)-
when packet_in occurs- msg = ev.msg pkt =
packet.Packet(msg.data) nw = pkt.get_protocol(ipv4.ipv4)
src = nw.src
dst = nw.dst
I add flow as follow- ........ ........
print "Adding flows"
actions = [datapath.ofproto_parser.OFPActionOutput(out_port)]
self.add_flow(datapath, dst, actions)
print "Flow Added"
My add_flow function is as follow-
def add_flow(self, datapath, dst, actions):
ofproto = datapath.ofproto
match = datapath.ofproto_parser.OFPMatch(
dl_dst=ipv4_to_bin(dst))
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)
My application prints that "Adding flows" but after that when it goes to the
add_flow function. it gives the following error-
hub: uncaught exception: Traceback (most recent call last):
File "/home/sakib/ryu/ryu/lib/hub.py", line 52, in _launch
func(*args, **kwargs)
File "/home/sakib/ryu/ryu/base/app_manager.py", line 274, in _event_loop
handler(ev)
File "/home/sakib/Desktop/shortest_path/shortest_path2.py", line 155, in
_packet_in_handler
self.add_flow(datapath, dst, actions)
File "/home/sakib/Desktop/shortest_path/shortest_path2.py", line 77, in
add_flow
dl_dst=ipv4_to_bin(dst))
File "/home/sakib/ryu/ryu/ofproto/ofproto_v1_3_parser.py", line 831, in
__init__
(k, v) in kwargs.iteritems())
File "/home/sakib/ryu/ryu/ofproto/ofproto_v1_3_parser.py", line 831, in
<genexpr>
(k, v) in kwargs.iteritems())
File "/home/sakib/ryu/ryu/ofproto/oxm_fields.py", line 233, in _normalize_user
(n, v, m) = mod.oxm_from_user(k, uv)
File "/home/sakib/ryu/ryu/ofproto/oxm_fields.py", line 180, in _from_user
(num, t) = _get_field_info_by_name(name_to_field, name)
File "/home/sakib/ryu/ryu/ofproto/oxm_fields.py", line 170, in
_get_field_info_by_name
raise KeyError('unknown match field ' + name)
KeyError: 'unknown match field dl_dst'
Thanks in advance for your cooperation.
RegardsSakib
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