LBRYCommunity/lbrycrd
1
0
Fork 0
Code Issues 29 Pull requests 1 Projects Releases 32 Packages Wiki Activity

CAddrMan: verify pchMessageStart file marker, before reading address data

Browse source 
This avoids the case where you read the address data, before noticing it is
the wrong network.
This commit is contained in:
Jeff Garzik 2012-10-08 13:41:57 -04:00 committed by Jeff Garzik
parent a6be58d536
commit bd2e140571
1 changed files with 7 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
src/db.cpp
View file

@ -842,20 +842,22 @@ bool CAddrDB::Read(CAddrMan& addr)
if (hashIn != hashTmp)
return error("CAddrman::Read() : checksum mismatch; data corrupted");
// de-serialize address data
unsigned char pchMsgTmp[4];
try {
// de-serialize file header (pchMessageStart magic number) and
ssPeers >> FLATDATA(pchMsgTmp);
// verify the network matches ours
if (memcmp(pchMsgTmp, pchMessageStart, sizeof(pchMsgTmp)))
return error("CAddrman::Read() : invalid network magic number");
// de-serialize address data into one CAddrMan object
ssPeers >> addr;
}
catch (std::exception &e) {
return error("CAddrman::Read() : I/O error or stream data corrupted");
}
// finally, verify the network matches ours
if (memcmp(pchMsgTmp, pchMessageStart, sizeof(pchMsgTmp)))
return error("CAddrman::Read() : invalid network magic number");
return true;
}