优化

cap.c

@@ -23,6 +23,7 @@ char    *command_result = NULL; // 执行命令的结果
 
 void Processing_IP_addresses(char *src_ip)
 {
+
     // 地域白名单
     char _region_list[WHITELIST_IP_NUM][WHITELIST_IP_NUM] = { { 0 }, { 0 } };
     char _REGION_LIST[BUFFER] = { 0 };
@@ -108,11 +109,11 @@ void Processing_IP_addresses(char *src_ip)
             fprintf(stderr, "Failed to parse JSON.\n");
         }
 
-        if (p != NULL)
+        if (p != NULL) {
             free(p);
+        }
     }
 
-       
     if (ip2region_area != NULL) {
         free(ip2region_area);
         ip2region_area = NULL;
@@ -125,9 +126,14 @@ void Processing_IP_addresses(char *src_ip)
 void packet_handler(u_char *args, const struct pcap_pkthdr *header, const u_char *packet)
 {
     int ethernet_header_len = 14;
+    //struct ip *ip_header = (struct ip *)(packet + ethernet_header_len);
     struct ip *ip_header = (struct ip *)(packet + ethernet_header_len);
+    if (ip_header->ip_v != 4) return;  // 只处理 IPv4
+
     char src_ip[INET_ADDRSTRLEN] = { 0 };
 
+
+
     inet_ntop(AF_INET, &(ip_header->ip_src), src_ip, INET_ADDRSTRLEN);
     Processing_IP_addresses(src_ip);