net: Add optional length checking to CService::SetSockAddr

In almost all cases (the only exception is `getifaddrs`), we know the
size of the data passed into SetSockAddr, so we can check this to be
what is expected.

src/net.cpp

@@ -383,7 +383,7 @@ static CAddress GetBindAddress(const Sock& sock)
     struct sockaddr_storage sockaddr_bind;
     socklen_t sockaddr_bind_len = sizeof(sockaddr_bind);
     if (!sock.GetSockName((struct sockaddr*)&sockaddr_bind, &sockaddr_bind_len)) {
-        addr_bind.SetSockAddr((const struct sockaddr*)&sockaddr_bind);
+        addr_bind.SetSockAddr((const struct sockaddr*)&sockaddr_bind, sockaddr_bind_len);
     } else {
         LogPrintLevel(BCLog::NET, BCLog::Level::Warning, "getsockname failed\n");
     }
@@ -1728,7 +1728,7 @@ void CConnman::AcceptConnection(const ListenSocket& hListenSocket) {
         return;
     }
 
-    if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr)) {
+    if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr, len)) {
         LogPrintLevel(BCLog::NET, BCLog::Level::Warning, "Unknown socket family\n");
     } else {
         addr = CAddress{MaybeFlipIPv6toCJDNS(addr), NODE_NONE};