fix issue where rtp stack was not paying attn to header extensions

src/include/switch_rtp.h

@@ -42,6 +42,7 @@
 SWITCH_BEGIN_EXTERN_C
 #define SWITCH_RTP_MAX_BUF_LEN 16384
 #define SWITCH_RTCP_MAX_BUF_LEN 16384
+#define SWITCH_RTP_MAX_BUF_LEN_WORDS 4094 /* (max / 4) - 2 */
 #define SWITCH_RTP_MAX_CRYPTO_LEN 64
 #define SWITCH_RTP_KEY_LEN 30
 #define SWITCH_RTP_CRYPTO_KEY_32 "AES_CM_128_HMAC_SHA1_32"

src/include/switch_types.h

@@ -767,6 +767,11 @@ typedef struct {
 	unsigned ssrc:32;			/* synchronization source */
 } switch_rtp_hdr_t;
 
+typedef struct {
+	unsigned length:16;			/* length                 */
+	unsigned profile:16;		/* defined by profile     */
+} switch_rtp_hdr_ext_t;
+
 #else /*  BIG_ENDIAN */
 
 typedef struct {
@@ -781,6 +786,11 @@ typedef struct {
 	unsigned ssrc:32;			/* synchronization source */
 } switch_rtp_hdr_t;
 
+typedef struct {
+	unsigned profile:16;		/* defined by profile     */
+	unsigned length:16;			/* length                 */
+} switch_rtp_hdr_ext_t;
+
 #endif
 
 #ifdef _MSC_VER