[openssl-users] Issue with DTLS for UDP

[Matt Caswell]

On 26/10/17 16:43, Grace Priscilla Jero wrote:
> Thankyou for the responses.
> We figured the issue. But now we are getting error -5 from "SSL_connect"
> and the errno is set to 22 which means invalid argument.
> Is there a easy way to debug or get logs for SSL_connect.
> 
> Below is the sequence for the dtls udp connect that we are trying.
> ssl = SSL_new(ctx)
> bio = BIO_new_dgram(sock_id,BIO_NOCLOSE)
> SSL_set_bio(ssl, bio, bio);
> VI_res = SSL_connect(ssl)

Do you really mean SSL_connect() returns -5? Or do you mean that after a
negative return value from SSL_connect() you call SSL_get_error() and
that return 5 (SSL_ERROR_SYSCALL)?

If you really mean SSL_connect() returns -5 then you need to call
SSL_get_error() as a next step.

If you are getting SSL_ERROR_SYSCALL then my guess is that there is a
problem with sock_id. How do create it?

Matt


> 
> 
> 
> Thanks,
> Grace
> 
> On Tue, Oct 24, 2017 at 4:07 PM, Matt Caswell <matt at openssl.org
> <mailto:matt at openssl.org>> wrote:
> 
> 
> 
>     On 24/10/17 11:25, Grace Priscilla Jero wrote:
>     > We are using SSL_accept to accept the connection for which we see the
>     > failure. Please let know if you have any thoughts.
> 
>     Have you set the wbio correctly? Does SSL_get_wbio() return your wbio
>     object if you call it immediately before SSL_do_handshake()?
> 
>     Matt
> 
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>