I suspect the line “OFP_NEW_MSG_PACK_STR = '!8S'”. I might have given a wrong
value there.
But, I am not able to find a good explanation on the notation used for each
message’s PACK_STR value.
If anyone has information on that, will be great !
Thanks
From: Rajasekaran, Monica
Sent: Wednesday, March 30, 2016 10:45 AM
To: '北邮-李呈' <[email protected]>; 'ryu-devel'
<[email protected]>
Subject: RE: Re:[Ryu-devel] Create a new OpenFlow message
Hi,
I followed the steps in the link to create a new OpenFlow message type but I
get an “error (attached image)” after I recompile and run ryu-manager.
The steps I followed are:
1. Added the following to ofproto_v1_3.py:
2. OFPT_NEW_MSG = 30 # User Added
# struct ofp_new_msg
OFP_NEW_MSG_PACK_STR = '!8S'
OFP_NEW_MSG_SIZE = 16
assert (calcsize(OFP_NEW_MSG_PACK_STR) + OFP_HEADER_SIZE == OFP_NEW_MSG_SIZE)
3. Added the following to ofproto_v1_3_parser.py:
4. @_register_parser
@_set_msg_type(ofproto.OFPT_NEW_MSG)
class OFPNEWMSG(MsgBase):
"""
USER ADDED CLASS FOR NEW MESSAGE
"""
def __init__(self, datapath, data=None):
super(OFPNEWMSG,self).__init__(datapath)
self.data=data
@classmethod
def parser(cls, datapath, version, MSG_TYPE, msg_len, XID, buf):
msg = super(OFPNEWMSG,cls).parser(datapath, version, MSG_TYPE, msg_len,
XID, buf)
offset = ofproto.OFP_HELLO_HEADER_SIZE
data= struct.unpack_from(ofproto.OFP_NEW_MSG_PACK_STR, msg.buf, offset)
msg.data=data
return msg
def _serialize_body(self):
msg_pack_into(ofproto.OFP_NEW_MSG_PACK_STR, self.buf,
ofproto.OFP_HEADER_SIZE, self.data)
5. Recompiled using “python ./setup.py install”
6. Ran ryu-manager --verbose
Any help is appreciated.
Thanks
From: Rajasekaran, Monica
Sent: Tuesday, March 29, 2016 4:17 PM
To: '北邮-李呈' <[email protected]<mailto:[email protected]>>; ryu-devel
<[email protected]<mailto:[email protected]>>
Subject: RE: Re:[Ryu-devel] Create a new OpenFlow message
Hi,
Thanks for the useful link. I will try it out by including the structure of the
message in ofproto_v1_3.py and adding a definition to ofproto_v1_3_parser.py.
Will send out an update on the same.
Thanks
From: 北邮-李呈 [mailto:[email protected]]
Sent: Monday, March 28, 2016 8:26 PM
To: Rajasekaran, Monica
<[email protected]<mailto:[email protected]>>;
ryu-devel
<[email protected]<mailto:[email protected]>>
Subject: Re:[Ryu-devel] Create a new OpenFlow message
You can find useful info at:
http://www.muzixing.com/pages/2015/11/20/ji-yu-ryuda-zao-zi-ding-yi-kong-zhi-qi.html
please locate the info at the context of 自定义报文.
------------------
Distance 李呈
_____________________________________________________
School of Information and Communication Engineering
Beijing University of Posts and Telecommunications
Beijing 100876, PR China
北京邮电大学・信息与通信工程学院・通信工程
_____________________________________________________
Mobile Phone:
(+86) 151-1698-3550 Beijing
E-mail:
[email protected]<mailto:[email protected]>
[email protected]<mailto:[email protected]>
Homepage:
http://www.muzixing.com
------------------ Original ------------------
From: "Rajasekaran,
Monica"<[email protected]<mailto:[email protected]>>;
Date: 2016年3月29日(星期二) 凌晨5:38
To:
"ryu-devel"<[email protected]<mailto:[email protected]>>;
Subject: [Ryu-devel] Create a new OpenFlow message
Hello,
I am a newbie to the Ryu Controller source code. I wish to create a new
Openflow message and send it to my OVS. Could someone provide me with some
guidance on how to proceed ?
I have already instructed my OVS on how to handle the same, trying to figure
out the controller part.
Thanks.
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