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net: resolve outside of storage structures

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Rather than allowing CNetAddr/CService/CSubNet to launch DNS queries, require
that addresses are already resolved.

This greatly simplifies async resolve logic, and makes it harder to
accidentally leak DNS queries.
This commit is contained in:
Cory Fields 2016-04-12 20:41:39 -04:00
parent a98cd1fc86
commit 367569926a
2 changed files with 10 additions and 7 deletions
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7
src/init.cpp
View file

@ -1156,10 +1156,11 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
if (mapArgs.count("-externalip")) {
BOOST_FOREACH(const std::string& strAddr, mapMultiArgs["-externalip"]) {
CService addrLocal(strAddr, GetListenPort(), fNameLookup);
if (!addrLocal.IsValid())
CService addrLocal;
if (Lookup(strAddr.c_str(), addrLocal, GetListenPort(), fNameLookup) && addrLocal.IsValid())
AddLocal(addrLocal, LOCAL_MANUAL);
else
return InitError(ResolveErrMsg("externalip", strAddr));
AddLocal(CService(strAddr, GetListenPort(), fNameLookup), LOCAL_MANUAL);
}
}

10
src/netbase.cpp
View file

@ -614,10 +614,12 @@ bool ConnectSocketByName(CService &addr, SOCKET& hSocketRet, const char *pszDest
proxyType nameProxy;
GetNameProxy(nameProxy);
CService addrResolved(CNetAddr(strDest, fNameLookup && !HaveNameProxy()), port);
if (addrResolved.IsValid()) {
addr = addrResolved;
return ConnectSocket(addr, hSocketRet, nTimeout);
CService addrResolved;
if (Lookup(strDest.c_str(), addrResolved, port, fNameLookup && !HaveNameProxy())) {
if (addrResolved.IsValid()) {
addr = addrResolved;
return ConnectSocket(addr, hSocketRet, nTimeout);
}
}
addr = CService("0.0.0.0:0");