Only auto-retry for DTLS if configured to do so
Otherwise we may end up in a hang when using blocking sockets
@@ -664,6 +664,18 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
return -1;
}
SSL3_RECORD_set_length(rr, 0);
+ if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
+ if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) {
+ /* no read-ahead left? */
+ BIO *bio;
+
+ s->rwstate = SSL_READING;
+ bio = SSL_get_rbio(s);
+ BIO_clear_retry_flags(bio);
+ BIO_set_retry_read(bio);
+ return -1;
+ }
+ }
goto start;
}
