public synchronized void handlePacket(Connection c, Packet p) {
Address address = c.getAddress();
System.out.println(p.toString());
// silently ignore packets from a connection if we haven't received a version packet
if (!c.hasReceivedVersion() && p.packetType() != PacketType.VERSION) {
return;
}
switch (p.packetType()) {
case VERSION:
VersionPacket v = (VersionPacket) p;
long ourVersion = ProtocolVersion.version(),
theirVersion = v.getVersion(),
negotiatedVersion;
negotiatedVersion = theirVersion < ourVersion ? theirVersion : ourVersion;
c.setVersion(negotiatedVersion);
c.hasReceivedVersion(true);
addressBook.justSeen(address);
if (negotiatedVersion >= 209) {
Packet verack = c.createPacket(PacketType.VERACK);
c.sendPacket(verack);
}
break;
case VERACK:
c.hasRecievedVerack(true);
addressBook.justSeen(address);
break;
case HEADERS:
// primitive headers function
HeadersPacket h = (HeadersPacket) p;
if (h.headers().size() == 0) {
break;
}
for (Block header : h.headers()) {
try {
blockChain.addBlock(header);
} catch (InvalidBlockException e) {
// TODO actually handle
e.printStackTrace();
continue;
} catch (OrphanBlockException e) {
// TODO actually handle
e.printStackTrace();
continue;
} catch (BlockExistsException e) {
// TODO actually handle
e.printStackTrace();
continue;
}
}
GetHeadersPacket gh = (GetHeadersPacket) c.createPacket(PacketType.GETHEADERS);
gh.startHashes().add(blockChain.topBlock().hash());
c.sendPacket(gh);
}
}
public synchronized void getInitialHeaders() {
for (Connection c : connections) {
GetHeadersPacket gh = (GetHeadersPacket) c.createPacket(PacketType.GETHEADERS);
gh.startHashes().add(blockChain.topBlock().hash());
c.sendPacket(gh);
}
}