The rtmp protocol uses nonblocking reads, to poll for incoming
messages from the server while publishing a stream.
Prior to 94599a6de3 and
d13b124eaf452b267480074b2e6946538ed03a6e, the tls protocol
handled the nonblocking flag, mostly as a side effect from not
using custom IO callbacks for reading from the socket. When custom
IO callbacks were taken into use in
d15eec4d6bdfa3bd4c4b5b7dd2dbd699ba253d02, the handling of a nonblocking
socket wasn't necessary for the default blocking mode any longer.
The code was simplified, since it was overlooked that other code
within libavformat actually used the tls protocol in nonblocking mode.
This fixes publishing over rtmps, with the gnutls backend.
Signed-off-by: Martin Storsjö <martin@martin.st>
TLS is currently implemented over either OpenSSL or GnuTLS, with more
backends likely to appear in the future. Currently, those backend libraries
are part of the protocol names used during e.g. the configure stage of a
build. Hide those details behind a generically-named declaration for the
TLS protocol to avoid leaking those details into the configuration stage.
Instead of a linked list constructed at av_register_all(), store them
in a constant array of pointers.
Since no registration is necessary now, this removes some global state
from lavf. This will also allow the urlprotocol layer caller to limit
the available protocols in a simple and flexible way in the following
commits.
GNUTLS_SHUT_RDWR means GnuTLS will keep waiting for the server's
termination reply. But since we don't shutdown the TCP connection at
this point yet, GnuTLS will just keep skipping actual data from the
server, which basically is perceived as hang.
Use GNUTLS_SHUT_WR instead, which doesn't have this problem.
Signed-off-by: Martin Storsjö <martin@martin.st>
Move the OpenSSL and GnuTLS implementations to their own files. Other
than the connection code (including options) and some boilerplate, no
code is actually shared.
Signed-off-by: Martin Storsjö <martin@martin.st>
Martin Storsjö
Diego Biurrun
Anton Khirnov
wm4