/**
* build an intersection of the locally configured capabilities and the capabilites passed in from
* the peer.
*
* @return
*/
public Set<Capability> intersectLocalAndRemoteCapabilities() {
Set<Capability> caps = new TreeSet<Capability>();
for (Capability cap : peerConfiguration.getCapabilities().getRequiredCapabilities())
if (remoteCapabilities.contains(cap)) caps.add(cap);
for (Capability cap : peerConfiguration.getCapabilities().getOptionalCapabilities())
if (remoteCapabilities.contains(cap)) caps.add(cap);
return caps;
}
/**
* List all locally configured capabilities of a given type
*
* @param capClass
* @return
*/
public <T extends Capability> Set<T> listLocalCapabilities(Class<T> capClass) {
Set<T> caps = new HashSet<T>();
caps.addAll(
listCapabilities(peerConfiguration.getCapabilities().getRequiredCapabilities(), capClass));
caps.addAll(
listCapabilities(peerConfiguration.getCapabilities().getOptionalCapabilities(), capClass));
return caps;
}
/**
* build a set of capabilites which are marked as required in the local configuration and which
* are not supported by the peer. The local speaker may build an Unsupported Capabilities
* notification message based on that info
*
* @return
*/
public Set<Capability> missingRequiredCapabilities() {
Set<Capability> caps = new TreeSet<Capability>();
for (Capability cap : peerConfiguration.getCapabilities().getRequiredCapabilities())
if (!remoteCapabilities.contains(cap)) caps.add(cap);
return caps;
}
/**
* Insert the currently negotiated capabilities into the OPEN packet.
*
* <p>If the capabilities contain an AS number larger than 65536 then the AS number in the OPEN
* packet is changed to AS_TRANS (23456)
*
* @param packet
* @see BGPv4Constants#BGP_AS_TRANS
*/
void insertLocalCapabilities(OpenPacket packet) {
packet.getCapabilities().clear();
insertLocalCapabilities(packet, peerConfiguration.getCapabilities().getRequiredCapabilities());
insertLocalCapabilities(packet, peerConfiguration.getCapabilities().getOptionalCapabilities());
}