From db9c8b0add566f57760dfc021006cf591f6ed453 Mon Sep 17 00:00:00 2001
From: csoutheren <csoutheren>
Date: Thu, 25 Nov 2004 07:23:46 +0000
Subject: [PATCH] Added IsSupportingRTP function to simplify detecting when
 STUN supports RTP

---
 include/ptclib/pstun.h | 17 +++++++++++++++++
 src/ptclib/pstun.cxx   | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/include/ptclib/pstun.h b/include/ptclib/pstun.h
index cced64a6..3018c987 100644
--- a/include/ptclib/pstun.h
+++ b/include/ptclib/pstun.h
@@ -24,6 +24,9 @@
  * Contributor(s): ______________________________________.
  *
  * $Log$
+ * Revision 1.9  2004/11/25 07:23:46  csoutheren
+ * Added IsSupportingRTP function to simplify detecting when STUN supports RTP
+ *
  * Revision 1.8  2004/03/14 05:47:52  rjongbloed
  * Fixed incorrect detection of symmetric NAT (eg Linux masquerading) and also
  *   some NAT systems which are partially blocked due to firewall rules.
@@ -173,6 +176,20 @@ class PSTUNClient : public PObject
       BOOL force = FALSE    /// Force a new check
     );
 
+    enum RTPSupportTypes {
+      RTPOK,
+      RTPUnknown,
+      RTPUnsupported,
+      RTPIfSendMedia
+    };
+
+    /**Return an indication if the current STUN type supports RTP
+      Use the force variable to guarantee an up to date test
+      */
+    RTPSupportTypes IsSupportingRTP(
+      BOOL force = FALSE    /// Force a new check
+    );
+
     /**Determine via the STUN protocol the NAT type for the router.
        As for GetNatType() but returns an English string for the type.
       */
diff --git a/src/ptclib/pstun.cxx b/src/ptclib/pstun.cxx
index 0b96ffa5..9f13bd66 100644
--- a/src/ptclib/pstun.cxx
+++ b/src/ptclib/pstun.cxx
@@ -24,6 +24,9 @@
  * Contributor(s): ______________________________________.
  *
  * $Log$
+ * Revision 1.16  2004/11/25 07:23:46  csoutheren
+ * Added IsSupportingRTP function to simplify detecting when STUN supports RTP
+ *
  * Revision 1.15  2004/10/26 05:58:23  csoutheren
  * Increased timeout on STUN responses to avoid spurious STUN failures due
  * to network trsffic/congestion etc
@@ -567,6 +570,36 @@ PString PSTUNClient::GetNatTypeName(BOOL force)
 }
 
 
+PSTUNClient::RTPSupportTypes PSTUNClient::IsSupportingRTP(BOOL force)
+{
+  switch (GetNatType(force)) {
+
+    // types that do support RTP 
+    case OpenNat:
+    case ConeNat:
+      return RTPOK;
+
+    // types that support RTP if media sent first
+    case SymmetricFirewall:
+    case RestrictedNat:
+    case PortRestrictedNat:
+      return RTPIfSendMedia;
+
+    // types that do not support RTP
+    case BlockedNat:
+    case SymmetricNat:
+      return RTPUnsupported;
+
+    // types that have unknown RTP support
+    case UnknownNat:
+    case PartialBlockedNat:
+    default:
+      break;
+  }
+
+  return RTPUnknown;
+}
+
 BOOL PSTUNClient::GetExternalAddress(PIPSocket::Address & externalAddress,
                                      const PTimeInterval & maxAge)
 {
-- 
2.11.4.GIT