Implement Realmedia/RTSP-compatible SETUP command. This includes calculation

of the "RealChallenge2" response, which is some sort of authentication. See
discussion in "Realmedia patch" thread on ffmpeg-devel.

Originally committed as revision 15170 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 40 insertions, 0 deletions

diff --git a/libavformat/rdt.h b/libavformat/rdt.h
new file mode 100644
index 0000000000..f7aad6dfc9
--- /dev/null
+++ b/libavformat/rdt.h
@@ -0,0 +1,40 @@
+/*
+ * Realmedia RTSP (RDT) definitions
+ * Copyright (c) 2007 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFORMAT_RDT_H
+#define AVFORMAT_RDT_H
+
+/**
+ * Calculate the response (RealChallenge2 in the RTSP header) to the
+ * challenge (RealChallenge1 in the RTSP header from the Real/Helix
+ * server), which is used as some sort of client validation.
+ *
+ * @param response pointer to response buffer, it should be at least 41 bytes
+ *                 (40 data + 1 zero) bytes long.
+ * @param chksum pointer to buffer containing a checksum of the response,
+ *               it should be at least 9 (8 data + 1 zero) bytes long.
+ * @param challenge pointer to the RealChallenge1 value provided by the
+ *                  server.
+ */
+void ff_rdt_calc_response_and_checksum(char response[41], char chksum[9],
+                                       const char *challenge);
+
+#endif /* AVFORMAT_RDT_H */