Using retransmission timer

[pokgak]

How is the retransmission of handshake messages done in tinydtls? Based on my testing (by dropping a handshake message manually on the client), there is currently no retransmission done automatically.

Do I need to call dtls_check_retransmit() after a certain period after sending the handshake message?

Also, I found the following in dtls.c. Does this mean that retransmitting handshake messages is still not supported?

https://github.com/eclipse/tinydtls/blob/d99fb8c4d9c80f67e6352bb009ef3a7d8b17e079/dtls.c#L1649-L1651

[peyton-li]

Do you resolve this problem？
i also find some problem in tinydtls when i use dtls_check_retransmit().

[mrdeep1]

dtls_check_retransmit() needs to be called periodically by a higher layer (unless if you have a CONTIKI environment which starts off a coap_retransmit_process thread) to see if any packet re-transmission is required. next returns the time dtls_check_retransmit() should next be called.

@peyton-li You need to be more specific as to what the problems are.