From c4bca15b08a34874fefc06529df98b4609abbf3d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Olivier=20Cr=C3=AAte?= <olivier.crete@collabora.com>
Date: Fri, 24 Jul 2015 19:52:11 -0400
Subject: rtpstream: Accept all uncrypted packets if no crypto set

---
 gst/fsrtpconference/fs-rtp-session.c | 26 ++++++++++++++++++++++++++
 gst/fsrtpconference/fs-rtp-stream.c  |  8 +++++++-
 gst/fsrtpconference/fs-rtp-stream.h  |  3 +++
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/gst/fsrtpconference/fs-rtp-session.c b/gst/fsrtpconference/fs-rtp-session.c
index b040a5cb..ee0225f2 100644
--- a/gst/fsrtpconference/fs-rtp-session.c
+++ b/gst/fsrtpconference/fs-rtp-session.c
@@ -5518,6 +5518,32 @@ _srtpdec_request_key (GstElement *srtpdec, guint ssrc, gpointer user_data)
     caps = fs_rtp_stream_get_srtp_caps_locked (stream);
     g_object_unref (stream);
   }
+  else
+  {
+    GList *item;
+    gboolean no_crypto = TRUE;
+    for (item = self->priv->streams; item; item = item->next)
+      if (fs_rtp_stream_requires_crypto_locked (item->data))
+      {
+        no_crypto = FALSE;
+        break;
+      }
+    if (no_crypto)
+    {
+      GST_DEBUG ("No stream found for SSRC %x, none of the streams require"
+          " crypto, so letting through", ssrc);
+      caps = gst_caps_new_simple ("application/x-srtp",
+          "srtp-cipher", G_TYPE_STRING, "null",
+          "srtcp-cipher", G_TYPE_STRING, "null",
+          "srtp-auth", G_TYPE_STRING, "null",
+          "srtcp-auth", G_TYPE_STRING, "null",
+          NULL);
+    }
+    else
+    {
+      GST_DEBUG ("Some streams require crypto, dropping packets");
+    }
+  }
 
   FS_RTP_SESSION_UNLOCK (self);
 
diff --git a/gst/fsrtpconference/fs-rtp-stream.c b/gst/fsrtpconference/fs-rtp-stream.c
index 294a0c8f..b2d59f2c 100644
--- a/gst/fsrtpconference/fs-rtp-stream.c
+++ b/gst/fsrtpconference/fs-rtp-stream.c
@@ -482,7 +482,7 @@ fs_rtp_stream_get_property (GObject *object,
       break;
     case PROP_REQUIRE_ENCRYPTION:
       FS_RTP_SESSION_LOCK (session);
-      g_value_set_boolean (value, self->priv->encrypted);
+      g_value_set_boolean (value, fs_rtp_stream_requires_crypto_locked (self));
       FS_RTP_SESSION_UNLOCK (session);
       break;
     default:
@@ -1580,3 +1580,9 @@ fs_rtp_stream_get_srtp_caps_locked (FsRtpStream *self)
       "srtcp-auth", G_TYPE_STRING, srtcp_auth,
       NULL);
 }
+
+gboolean
+fs_rtp_stream_requires_crypto_locked (FsRtpStream *self)
+{
+  return self->priv->encrypted;
+}
diff --git a/gst/fsrtpconference/fs-rtp-stream.h b/gst/fsrtpconference/fs-rtp-stream.h
index a2e7d18f..a4b3fb23 100644
--- a/gst/fsrtpconference/fs-rtp-stream.h
+++ b/gst/fsrtpconference/fs-rtp-stream.h
@@ -131,6 +131,9 @@ validate_srtp_parameters (GstStructure *parameters,
 GstCaps *
 fs_rtp_stream_get_srtp_caps_locked (FsRtpStream *self);
 
+gboolean
+fs_rtp_stream_requires_crypto_locked (FsRtpStream *self);
+
 G_END_DECLS
 
 #endif /* __FS_RTP_STREAM_H__ */
-- 
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