[FFmpeg-devel] [PATCH] libavformat/tls_libtls: handle TLS_WANT_POLLIN and TLS_WANT_POLLOUT return values

[Michael Forney]

These values may be returned from libtls (even in the case of blocking
file descriptors) when we need to read/write more TLS record data in
order to read/write application data.

The URLProtocol documentation says AVERROR(EAGAIN) should be returned
in these cases.

Signed-off-by: Michael Forney <mforney at mforney.org>
---
 libavformat/tls_libtls.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavformat/tls_libtls.c b/libavformat/tls_libtls.c
index ba83b56ffe..286454e452 100644
--- a/libavformat/tls_libtls.c
+++ b/libavformat/tls_libtls.c
@@ -159,6 +159,8 @@ static int ff_tls_read(URLContext *h, uint8_t *buf, int size)
         return ret;
     else if (ret == 0)
         return AVERROR_EOF;
+    else if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT)
+        return AVERROR(EAGAIN);
     av_log(h, AV_LOG_ERROR, "%s\n", tls_error(p->ctx));
     return AVERROR(EIO);
 }
@@ -172,6 +174,8 @@ static int ff_tls_write(URLContext *h, const uint8_t *buf, int size)
         return ret;
     else if (ret == 0)
         return AVERROR_EOF;
+    else if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT)
+        return AVERROR(EAGAIN);
     av_log(h, AV_LOG_ERROR, "%s\n", tls_error(p->ctx));
     return AVERROR(EIO);
 }
-- 
2.24.0