/**
* match is called when a switch sends a packet in to the controller. The goal is to find all flow
* space rules which match the fields of the packet in.
*
* @param dpid - the datapath id of the switch which sent the packet in.
* @param match - the packet in information
* @return a list, sorted by priority, of flow space rules which match.
*/
public List<FlowEntry> match(long dpid, FVMatch match) {
BitSet set = new BitSet();
LinkedList<FlowEntry> flowrules = new LinkedList<FlowEntry>();
int wildcards = match.getWildcards();
FVLog.log(LogLevel.DEBUG, null, "dpid: ", dpid, "match: ", match.toString());
set.or(allRules);
FVLog.log(LogLevel.DEBUG, null, "allRules: ", set.toString());
try {
testEmpty(set, dpids, dpid, FlowEntry.ALL_DPIDS, wildcards, 0);
/*
* Test every field and intersect the resulting bitset. If the bit
* set is empty an exception is thrown to stop the search.
*/
testEmpty(set, port, match.getInputPort(), ANY_IN_PORT, wildcards, FVMatch.OFPFW_IN_PORT);
if (match.getDataLayerVirtualLan() != ANY_VLAN_ID) {
testEmpty(
set,
vlan,
(int) match.getDataLayerVirtualLan(),
(int) ANY_VLAN_ID,
wildcards,
FVMatch.OFPFW_DL_VLAN);
testEmpty(
set,
vlan,
match.getDataLayerVirtualLanPriorityCodePoint() << 16,
ANY_VLAN_PCP << 16,
wildcards,
FVMatch.OFPFW_DL_VLAN_PCP);
} else {
set.andNot(vlan_ignore);
}
testEmpty(
set, dl_type, match.getDataLayerType(), ANY_ETHER, wildcards, FVMatch.OFPFW_DL_TYPE);
testEmpty(
set,
nw,
(short) match.getNetworkProtocol(),
(short) ANY_NW_PROTO_TOS,
wildcards,
FVMatch.OFPFW_NW_PROTO);
testEmpty(
set,
nw,
(short) (match.getNetworkTypeOfService() << 8),
(short) (ANY_NW_PROTO_TOS << 8),
wildcards,
FVMatch.OFPFW_NW_TOS);
testEmpty(
set, tp, (int) match.getTransportSource(), (int) ANY_TP, wildcards, FVMatch.OFPFW_TP_SRC);
testEmpty(
set,
tp,
match.getTransportDestination() << 16,
ANY_TP << 16,
wildcards,
FVMatch.OFPFW_TP_DST);
testEmpty(
set,
dl_src,
FVMatch.toLong(match.getDataLayerSource()),
ANY_MAC,
wildcards,
FVMatch.OFPFW_DL_SRC);
testEmpty(
set,
dl_dst,
FVMatch.toLong(match.getDataLayerDestination()),
ANY_MAC,
wildcards,
FVMatch.OFPFW_DL_DST);
for (int i = set.nextSetBit(0); i >= 0; i = set.nextSetBit(i + 1)) {
FlowEntry fe = rules.get(i);
FVMatch ruleMatch = fe.getRuleMatch();
FlowIntersect inter;
inter = new FlowIntersect(fe.clone());
FVMatch interMatch = inter.getMatch();
interMatch.setNetworkDestination(
testIP(
inter,
FVMatch.OFPFW_NW_DST_SHIFT,
match.getNetworkDestinationMaskLen(),
ruleMatch.getNetworkDestinationMaskLen(),
match.getNetworkDestination(),
ruleMatch.getNetworkDestination()));
if (inter.getMatchType() == MatchType.NONE) {
set.clear(i);
continue;
}
// test ip_src
interMatch.setNetworkSource(
testIP(
inter,
FVMatch.OFPFW_NW_SRC_SHIFT,
match.getNetworkSourceMaskLen(),
ruleMatch.getNetworkSourceMaskLen(),
match.getNetworkSource(),
ruleMatch.getNetworkSource()));
if (inter.getMatchType() == MatchType.NONE) {
set.clear(i);
continue;
}
}
} catch (NoMatch e) {
FVLog.log(LogLevel.INFO, null, "No match for: ", match);
return flowrules;
}
/*
* If we got here we have a match. Now return a prioritized list of
* matches.
*
* Higher numbers have higher priorities.
*/
TreeSet<FlowEntry> entries = new TreeSet<FlowEntry>();
for (int i = set.nextSetBit(0); i >= 0; i = set.nextSetBit(i + 1)) {
entries.add(rules.get(i));
}
flowrules.addAll(entries);
return flowrules;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#clone()
*/
@Override
public FlowMap clone() {
LinearFlowMap flowMap = new LinearFlowMap();
for (FlowEntry flowEntry : this.rules) flowMap.addRule(flowEntry.clone());
return flowMap;
}