Add tools packet_parser

src/packet/udp_utils.h

@@ -6,6 +6,7 @@ extern "C"
 {
 #endif
 
+#include <stdio.h>
 #include <arpa/inet.h>
 #define __FAVOR_BSD 1
 #include <netinet/udp.h>
@@ -72,6 +73,14 @@ static inline void udp_hdr_set_checksum(struct udphdr *hdr, uint16_t sum)
     hdr->uh_sum = htons(sum);
 }
 
+static inline int udp_hdr_to_str(const struct udphdr *hdr, char *buf, size_t size)
+{
+    memset(buf, 0, size);
+    return snprintf(buf, size, "UDP: src_port=%u dst_port=%u total_len=%u checksum=%u",
+                    udp_hdr_get_src_port(hdr), udp_hdr_get_dst_port(hdr),
+                    udp_hdr_get_total_len(hdr), udp_hdr_get_checksum(hdr));
+}
+
 #ifdef __cplusplus
 }
 #endif