CAddress addrFrom;
uint64 nNonce = 1;
vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
- if (pfrom->nVersion < 209)
+ if (pfrom->nVersion < MIN_PROTO_VERSION)
{
// Since February 20, 2012, the protocol is initiated at version 209,
// and earlier versions are no longer supported
}
// Get recent addresses
- if (pfrom->nVersion >= 31402 || addrman.size() < 1000)
+ if (pfrom->nVersion >= CADDR_TIME_VERSION || addrman.size() < 1000)
{
pfrom->PushMessage("getaddr");
pfrom->fGetAddr = true;
// Ask the first connected node for block updates
static int nAskedForBlocks = 0;
if (!pfrom->fClient &&
- (pfrom->nVersion < 32000 || pfrom->nVersion >= 32400) &&
+ (pfrom->nVersion < NOBLKS_VERSION_START ||
+ pfrom->nVersion >= NOBLKS_VERSION_END) &&
(nAskedForBlocks < 1 || vNodes.size() <= 1))
{
nAskedForBlocks++;
vRecv >> vAddr;
// Don't want addr from older versions unless seeding
- if (pfrom->nVersion < 31402 && addrman.size() > 1000)
+ if (pfrom->nVersion < CADDR_TIME_VERSION && addrman.size() > 1000)
return true;
if (vAddr.size() > 1000)
{
multimap<uint256, CNode*> mapMix;
BOOST_FOREACH(CNode* pnode, vNodes)
{
- if (pnode->nVersion < 31402)
+ if (pnode->nVersion < CADDR_TIME_VERSION)
continue;
unsigned int nPointer;
memcpy(&nPointer, &pnode, sizeof(nPointer));
hSocket = hSocketIn;
vSend.SetType(SER_NETWORK);
vRecv.SetType(SER_NETWORK);
- vSend.SetVersion(209);
- vRecv.SetVersion(209);
+ vSend.SetVersion(MIN_PROTO_VERSION);
+ vRecv.SetVersion(MIN_PROTO_VERSION);
nLastSend = 0;
nLastRecv = 0;
nLastSendEmpty = GetTime();
static const int PROTOCOL_VERSION = 60000;
+// earlier versions not supported as of Feb 2012, and are disconnected
+static const int MIN_PROTO_VERSION = 209;
+
+// nTime field added to CAddress, starting with this version;
+// if possible, avoid requesting addresses nodes older than this
+static const int CADDR_TIME_VERSION = 31402;
+
+// only request blocks from nodes outside this range of versions
+static const int NOBLKS_VERSION_START = 32000;
+static const int NOBLKS_VERSION_END = 32400;
+
// BIP 0031, pong message, is enabled for all versions AFTER this one
static const int BIP0031_VERSION = 60000;