Support encrypted RTP extensions (RFC 6904)

webrtc/media/base/fakertp.h

Index: webrtc/media/base/fakertp.h
diff --git a/webrtc/media/base/fakertp.h b/webrtc/media/base/fakertp.h
index a9c6fe01632654a3b93bce9a03c1975d29cf73bd..88419a55e88c83d87d1ca27f3a5cfdc2610589b8 100644
--- a/webrtc/media/base/fakertp.h
+++ b/webrtc/media/base/fakertp.h
@@ -13,6 +13,8 @@
 #ifndef WEBRTC_MEDIA_BASE_FAKERTP_H_
 #define WEBRTC_MEDIA_BASE_FAKERTP_H_
 
+#include <vector>
+
 // A typical PCMU RTP packet.
 // PT=0, SN=1, TS=0, SSRC=1
 // all data FF
@@ -40,6 +42,48 @@ static const unsigned char kPcmuFrame[] = {
   0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
 };
 
+// A typical PCMU RTP packet with header extensions.
+// PT=0, SN=1, TS=0, SSRC=1
+// all data FF
+static const unsigned char kPcmuFrameWithExtensions[] = {
+  0x90, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
+  // RFC 5285, section 4.2. One-Byte Header.
+  0xBE, 0xDE,
+  // Header extension length 6 * 32 bits.
+  0x00, 0x06,
+  // 8 bytes header id 1.
+  0x17, 0x41, 0x42, 0x73, 0xA4, 0x75, 0x26, 0x27, 0x48,
+  // 3 bytes header id 2.
+  0x22, 0x00, 0x00, 0xC8,
+  // 1 byte header id 3.
+  0x30, 0x8E,
+  // 7 bytes header id 4.
+  0x46, 0x55, 0x99, 0x63, 0x86, 0xB3, 0x95, 0xFB,
+  // 1 byte header padding.
+  0x00,
+  // Payload data.
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+};
+
 // A typical Receiver Report RTCP packet.
 // PT=RR, LN=1, SSRC=1
 // send SSRC=2, all other fields 0
@@ -84,4 +128,11 @@ static const unsigned char kDataPacket[] = {
   0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
 };
 
+// This expects both packets to be based on kPcmuFrameWithExtensions.
+// Header extensions with an id in "encrypted_headers" are expected to be
+// different in the packets unless "expect_equal" is set to "true".
+void CompareHeaderExtensions(const char* packet1, size_t packet1_size,
+    const char* packet2, size_t packet2_size,
+    const std::vector<int> encrypted_headers, bool expect_equal);
+
 #endif  // WEBRTC_MEDIA_BASE_FAKERTP_H_