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* Enable auto DHE and disable session tickets for some tests.jsing2021-02-071-12/+13
| | | | This allows us to drop the server messages that we intend on dropping.
* Only hexdump packets/messages on higher debug levels.jsing2021-02-061-3/+4
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* Test reads and writes between the client and server.jsing2021-02-061-3/+49
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* Add an explicit cast to make this test compile and pass with gcc.tb2020-10-161-2/+2
| | | | | gcc emits a signed vs unsigned comparison warning which breaks the build due to -Werror.
* Test DTLS timeouts and retransmissions by dropping specific messages.jsing2020-10-151-5/+299
| | | | | | | | | Provide a BIO that can drop specific messages in order to trigger and test DTLS timeouts and retransmissions. Note that the SSL buffering BIO (bbio) has to be removed to ensure that handshake messages are sent individually. This would have detected the recent DTLS breakage with retransmissions for a flight that includes a CCS.
* Improve poll and event handling.jsing2020-10-151-8/+27
| | | | | In particular, ensure we clear events when the client or server side has completed and fix timeouts to ensure we use a non-zero timeout if present.
* Add regress tests for DTLS.jsing2020-10-142-0/+411
Test the operation of a DTLS client and server, with and without cookies, using the default MTU and a specifically lowered MTU. Further regress tests will be built on this to exercise other parts of the DTLS code base (such as retransmission, fragmentation and reassembly).