Add support for parsing PW Ethernet and Enhanced MPLS parsing

src/packet/udp_utils.h

@@ -7,6 +7,7 @@ extern "C"
 #endif
 
 #include <stdio.h>
+#include <string.h>
 #include <arpa/inet.h>
 #define __FAVOR_BSD 1
 #include <netinet/udp.h>
@@ -73,6 +74,10 @@ static inline void udp_hdr_set_checksum(struct udphdr *hdr, uint16_t sum)
     hdr->uh_sum = htons(sum);
 }
 
+/******************************************************************************
+ * print
+ ******************************************************************************/
+
 static inline int udp_hdr_to_str(const struct udphdr *hdr, char *buf, size_t size)
 {
     memset(buf, 0, size);