Merge pull request #167 from CESNET/ovpn_fix

Improvment of OVPN plugin

Author: hynekkar

Makefile.am

@@ -182,7 +182,8 @@ ipfixprobe_headers_src=\
 		include/ipfixprobe/packet.hpp \
 		include/ipfixprobe/ring.h \
 		include/ipfixprobe/byte-utils.hpp \
-		include/ipfixprobe/ipfix-elements.hpp
+		include/ipfixprobe/ipfix-elements.hpp \
+		include/ipfixprobe/rtp.hpp
 
 ipfixprobe_src=\
 		$(ipfixprobe_input_src) \

include/ipfixprobe/rtp.hpp

@@ -0,0 +1,33 @@
+#include <inttypes.h>
+#include <limits>
+
+struct __attribute__((packed)) rtp_header {
+    union {
+        struct {
+#if defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN
+            uint16_t csrc_count : 4;
+            uint16_t extension : 1;
+            uint16_t padding : 1;
+            uint16_t version : 2;
+            // next byte
+            uint16_t payload_type : 7;
+            uint16_t marker : 1;
+#elif defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN
+            uint16_t version : 2;
+            uint16_t padding : 1;
+            uint16_t extension : 1;
+            uint16_t csrc_count : 4;
+            // next byte
+            uint16_t marker : 1;
+            uint16_t payload_type : 7;
+
+#else // if defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN
+#error "Please fix <endian.h>"
+#endif // if defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN
+        };
+        uint16_t flags;
+    };
+    uint16_t sequence_number;
+    uint32_t timestamp;
+    uint32_t ssrc;
+};