Hi All,
I am not able to delete a flow entry. Following is my code snippet, I have
added to the "switch" module in NOX.
Basically, I store the flows that I want to delete.
The delete is sending flow_mod to switch. But, I am not receiving Flow
Removed or a New Packet In for the deleted flows. Dpctl dump flows also
still shows the flow. Which means it is not deleted.
Is this a bug with userspace openflow switch (ofprotocol/ofdatapath) or I am
doing something wrong.
Thanks a lot,
Vishal
Call back function:
delete_rule ( ) {
*/* *
*Retrieving information needed to delete a flow rule.*
*Stored from a previously received Packet IN, rule corresponding to which is
being deleted now.*
*
*
**/*
Flow flow = (Flow)flow_list[0];
uint32_t buffer_id = (uint32_t)buffer_id_list[0];
int out_port = (int) out_port_list[0];
datapathid datapath_id = (datapathid) datapath_id_list[0];
ofp_flow_mod* ofm;
size_t size = sizeof *ofm ;//+ sizeof(ofp_action_output);
boost::shared_array<char> raw_of(new char[size]);
ofm = (ofp_flow_mod*) raw_of.get();
*// Populating OF header*
ofm->header.version = OFP_VERSION;
ofm->header.type = OFPT_FLOW_MOD;
ofm->header.length = htons(size);
//ofm->match.wildcards = htonl(0);
//ofm->match.in_port = htons(flow.in_port);
//VLOG_DBG(log, "Input Port %d",(int)flow.in_port);
//ofm->match.dl_vlan = flow.dl_vlan;
//ofm->match.dl_vlan_pcp = flow.dl_vlan_pcp;
//memcpy(ofm->match.dl_src, flow.dl_src.octet, sizeof
ofm->match.dl_src);
//memcpy(ofm->match.dl_dst, flow.dl_dst.octet, sizeof
ofm->match.dl_dst);
//ofm->match.dl_type = flow.dl_type;
ofm->match.nw_src = flow.nw_src;
ofm->match.nw_dst = flow.nw_dst;
//VLOG_DBG(log, "Nw Src %d",flow.nw_src);
//VLOG_DBG(log, "Nw Dst %d",flow.nw_dst);
//ofm->match.nw_proto = flow.nw_proto;
//ofm->match.nw_tos = flow.nw_tos;
ofm->match.tp_src = flow.tp_src;
ofm->match.tp_dst = flow.tp_dst;
ofm->cookie = htonl(0);
//ofm->out_group = htonl(OFPG_ANY); //version 1.1.0
ofm->out_port = htonl(OFPP_NONE);
ofm->command = htons(OFPFC_DELETE);
//ofm->buffer_id = htonl(buffer_id);
ofm->idle_timeout = htons(5);
ofm->hard_timeout = htons(OFP_FLOW_PERMANENT);
ofm->priority = htons(OFP_DEFAULT_PRIORITY);
ofm->flags = htons(ofd_flow_mod_flags());
// ofp_action_output& action = *((ofp_action_output*)ofm->actions);
// memset(&action, 0, sizeof(ofp_action_output));
// action.type = htons(OFPAT_OUTPUT);
// action.len = htons(sizeof(ofp_action_output));
// action.max_len = htons(0);
// action.port = htons(out_port);
// VLOG_DBG(log, "Output Port %d",(int)action.port);*/
send_openflow_command(datapath_id, &ofm->header, true);
}
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