@LogMessageDocs({
@LogMessageDoc(
level = "ERROR",
message = "Failure writing deny flow mod",
explanation = "An I/O error occurred while writing a " + "deny flow mod to a switch",
recommendation = LogMessageDoc.CHECK_SWITCH)
})
public static boolean blockHost(
IFloodlightProviderService floodlightProvider,
SwitchPort sw_tup,
long host_mac,
short hardTimeout,
long cookie) {
if (sw_tup == null) {
return false;
}
IOFSwitch sw = floodlightProvider.getSwitches().get(sw_tup.getSwitchDPID());
if (sw == null) return false;
int inputPort = sw_tup.getPort();
log.debug(
"blockHost sw={} port={} mac={}", new Object[] {sw, sw_tup.getPort(), new Long(host_mac)});
// Create flow-mod based on packet-in and src-switch
OFFlowMod fm = (OFFlowMod) floodlightProvider.getOFMessageFactory().getMessage(OFType.FLOW_MOD);
OFMatch match = new OFMatch();
List<OFAction> actions = new ArrayList<OFAction>(); // Set no action to
// drop
match
.setDataLayerSource(Ethernet.toByteArray(host_mac))
.setInputPort((short) inputPort)
.setWildcards(OFMatch.OFPFW_ALL & ~OFMatch.OFPFW_DL_SRC & ~OFMatch.OFPFW_IN_PORT);
fm.setCookie(cookie)
.setHardTimeout(hardTimeout)
.setIdleTimeout(FLOWMOD_DEFAULT_IDLE_TIMEOUT)
.setHardTimeout(FLOWMOD_DEFAULT_HARD_TIMEOUT)
.setBufferId(OFPacketOut.BUFFER_ID_NONE)
.setMatch(match)
.setActions(actions)
.setLengthU(OFFlowMod.MINIMUM_LENGTH); // +OFActionOutput.MINIMUM_LENGTH);
try {
log.debug("write drop flow-mod sw={} match={} flow-mod={}", new Object[] {sw, match, fm});
// TODO: can't use the message damper sine this method is static
sw.write(fm, null);
} catch (IOException e) {
log.error("Failure writing deny flow mod", e);
return false;
}
return true;
}
