Fix CVE-2014-0221

Unnecessary recursion when receiving a DTLS hello request can be used to
crash a DTLS client. Fixed by handling DTLS hello request without
recursion.

Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.

(Imported from upstream's 8942b92c7cb5fa144bd79b7607b459d0b777164c)
1 file changed