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Send final alert message to older peers after connecting.

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The old Bitcoin alert system has long since been retired.
( See also: https://bitcoin.org/en/alert/2016-11-01-alert-retirement )

This change causes each node to send any old peers that
 it connects with a copy of the final alert.

The alert it hardcode cancels all other alerts including
 other final alerts.
This commit is contained in:
Gregory Maxwell 2017-01-20 02:38:12 +00:00
parent 82274c02ed
commit 8ff8d219c3
1 changed files with 6 additions and 0 deletions
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6
src/net_processing.cpp
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@ -1324,6 +1324,12 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
pfrom->nTimeOffset = nTimeOffset;
AddTimeData(pfrom->addr, nTimeOffset);
// If the peer is old enough to have the old alert system, send it the final alert.
if (pfrom->nVersion <= 70012) {
CDataStream finalAlert(ParseHex("60010000000000000000000000ffffff7f00000000ffffff7ffeffff7f01ffffff7f00000000ffffff7f00ffffff7f002f555247454e543a20416c657274206b657920636f6d70726f6d697365642c2075706772616465207265717569726564004630440220653febd6410f470f6bae11cad19c48413becb1ac2c17f908fd0fd53bdc3abd5202206d0e9c96fe88d4a0f01ed9dedae2b6f9e00da94cad0fecaae66ecf689bf71b50"), SER_NETWORK, PROTOCOL_VERSION);
connman.PushMessage(pfrom, CNetMsgMaker(nSendVersion).Make("alert", finalAlert));
}
// Feeler connections exist only to verify if address is online.
if (pfrom->fFeeler) {
assert(pfrom->fInbound == false);