@Override
@LogMessageDoc(
level = "ERROR",
message = "Unexpected decision made for this packet-in={}",
explanation =
"An unsupported PacketIn decision has been " + "passed to the flow programming component",
recommendation = LogMessageDoc.REPORT_CONTROLLER_BUG)
public Command processPacketInMessage(
IOFSwitch sw, OFPacketIn pi, IRoutingDecision decision, FloodlightContext cntx) {
Ethernet eth =
IFloodlightProviderService.bcStore.get(cntx, IFloodlightProviderService.CONTEXT_PI_PAYLOAD);
// If a decision has been made we obey it
// otherwise we just forward
if (decision != null) {
if (log.isTraceEnabled()) {
log.trace(
"Forwaring decision={} was made for PacketIn={}",
decision.getRoutingAction().toString(),
pi);
}
switch (decision.getRoutingAction()) {
case NONE:
// don't do anything
return Command.CONTINUE;
case FORWARD_OR_FLOOD:
case FORWARD:
doForwardFlow(sw, pi, cntx, false);
return Command.CONTINUE;
case MULTICAST:
// treat as broadcast
doFlood(sw, pi, cntx);
return Command.CONTINUE;
case DROP:
doDropFlow(sw, pi, decision, cntx);
return Command.CONTINUE;
default:
log.error(
"Unexpected decision made for this packet-in={}", pi, decision.getRoutingAction());
return Command.CONTINUE;
}
} else {
if (log.isTraceEnabled()) {
log.trace("No decision was made for PacketIn={}, forwarding", pi);
}
if (eth.isBroadcast() || eth.isMulticast()) {
// For now we treat multicast as broadcast
doFlood(sw, pi, cntx);
} else {
doForwardFlow(sw, pi, cntx, false);
}
}
return Command.CONTINUE;
}
@LogMessageDoc(
level = "ERROR",
message = "Failure writing drop flow mod",
explanation = "An I/O error occured while trying to write a " + "drop flow mod to a switch",
recommendation = LogMessageDoc.CHECK_SWITCH)
protected void doDropFlow(
IOFSwitch sw, OFPacketIn pi, IRoutingDecision decision, FloodlightContext cntx) {
// initialize match structure and populate it using the packet
OFMatch match = new OFMatch();
match.loadFromPacket(pi.getPacketData(), pi.getInPort());
if (decision.getWildcards() != null) {
match.setWildcards(decision.getWildcards());
}
// Create flow-mod based on packet-in and src-switch
OFFlowMod fm = (OFFlowMod) floodlightProvider.getOFMessageFactory().getMessage(OFType.FLOW_MOD);
List<OFAction> actions = new ArrayList<OFAction>(); // Set no action to
// drop
long cookie = AppCookie.makeCookie(FORWARDING_APP_ID, 0);
fm.setCookie(cookie)
.setHardTimeout((short) 0)
.setIdleTimeout((short) 5)
.setBufferId(OFPacketOut.BUFFER_ID_NONE)
.setMatch(match)
.setActions(actions)
.setLengthU(OFFlowMod.MINIMUM_LENGTH); // +OFActionOutput.MINIMUM_LENGTH);
try {
if (log.isDebugEnabled()) {
log.debug("write drop flow-mod sw={} match={} flow-mod={}", new Object[] {sw, match, fm});
}
messageDamper.write(sw, fm, cntx);
} catch (IOException e) {
log.error("Failure writing drop flow mod", e);
}
}
protected void doForwardFlow(IOFSwitch sw, OFPacketIn pi, FloodlightContext cntx) {
// Setup fields for our packets
OFMatch match = new OFMatch();
match.loadFromPacket(pi.getPacketData(), pi.getInPort());
// Check if we have the location of the destination
IDevice dstDevice = IDeviceService.fcStore.get(cntx, IDeviceService.CONTEXT_DST_DEVICE);
if (dstDevice != null) {
IDevice srcDevice = IDeviceService.fcStore.get(cntx, IDeviceService.CONTEXT_SRC_DEVICE);
Long srcIsland = topology.getL2DomainId(sw.getId());
if (srcDevice == null) {
log.debug("No device entry found for source device");
return;
}
if (srcIsland == null) {
log.debug("No openflow island found for source {}/{}", sw.getStringId(), pi.getInPort());
return;
}
// Validate that we have a destination known on the same
// island
// Validate that the source and destination are not on
// the same switchport
boolean on_same_island = false;
boolean on_same_if = false;
for (SwitchPort dstDap : dstDevice.getAttachmentPoints()) {
long dstSwDpid = dstDap.getSwitchDPID();
Long dstIsland = topology.getL2DomainId(dstSwDpid);
if ((dstIsland != null) && dstIsland.equals(srcIsland)) {
on_same_island = true;
if ((sw.getId() == dstSwDpid) && (pi.getInPort() == dstDap.getPort())) {
on_same_if = true;
}
break;
}
}
if (!on_same_island) {
// Flood since we don't know the dst device
if (log.isTraceEnabled()) {
log.trace(
"No first hop island found for destination " + "device {}, Action = flooding",
dstDevice);
}
doFlood(sw, pi, cntx);
return;
}
if (on_same_if) {
if (log.isTraceEnabled()) {
log.trace(
"Both source and destination are on the same " + "switch/port {}/{}, Action = NOP",
sw.toString(),
pi.getInPort());
}
return;
}
// Install all the routes where both src and dst have
// attachment
// points. Since the lists are stored in sorted order we
// can
// traverse the attachment points in O(m+n) time
SwitchPort[] srcDaps = srcDevice.getAttachmentPoints();
Arrays.sort(srcDaps, clusterIdComparator);
SwitchPort[] dstDaps = dstDevice.getAttachmentPoints();
Arrays.sort(dstDaps, clusterIdComparator);
int iSrcDaps = 0, iDstDaps = 0;
while ((iSrcDaps < srcDaps.length) && (iDstDaps < dstDaps.length)) {
SwitchPort srcDap = srcDaps[iSrcDaps];
SwitchPort dstDap = dstDaps[iDstDaps];
Long srcCluster = topology.getL2DomainId(srcDap.getSwitchDPID());
Long dstCluster = topology.getL2DomainId(dstDap.getSwitchDPID());
int srcVsDest = srcCluster.compareTo(dstCluster);
if (srcVsDest == 0) {
if (!srcDap.equals(dstDap) && (srcCluster != null) && (dstCluster != null)) {
// TODO: INSERT DIJKSTRA HERE FOR OUR VIDEO FLOWS
// AND CALCULATE FLOWS
// Call getroute also with weights!!
Route route =
getRoute(
srcDap.getSwitchDPID(),
(short) srcDap.getPort(),
dstDap.getSwitchDPID(),
(short) dstDap.getPort());
if (route != null) {
if (log.isTraceEnabled()) {
log.trace(
"pushRoute match={} route={} " + "destination={}:{}",
new Object[] {match, route, dstDap.getSwitchDPID(), dstDap.getPort()});
}
long cookie = AppCookie.makeCookie(FORWARDING_APP_ID, 0);
// if there is prior routing decision
// use wildcard
Integer wildcard_hints = null;
IRoutingDecision decision = null;
if (cntx != null) {
decision = IRoutingDecision.rtStore.get(cntx, IRoutingDecision.CONTEXT_DECISION);
}
if (decision != null) {
wildcard_hints = decision.getWildcards();
} else {
// L2 only wildcard if there is no
// prior route decision
wildcard_hints =
((Integer) sw.getAttribute(IOFSwitch.PROP_FASTWILDCARDS)).intValue()
& ~OFMatch.OFPFW_IN_PORT
& ~OFMatch.OFPFW_DL_VLAN
& ~OFMatch.OFPFW_DL_SRC
& ~OFMatch.OFPFW_DL_DST
& ~OFMatch.OFPFW_NW_SRC_MASK
& ~OFMatch.OFPFW_NW_DST_MASK;
}
pushRoute(
route,
match,
wildcard_hints,
pi,
sw.getId(),
cookie,
cntx,
false,
false,
OFFlowMod.OFPFC_ADD);
}
}
iSrcDaps++;
iDstDaps++;
} else if (srcVsDest < 0) {
iSrcDaps++;
} else {
iDstDaps++;
}
}
} else {
// Flood since we don't know the dst device
doFlood(sw, pi, cntx);
}
}
