优化

cap.c

@@ -188,7 +188,6 @@ void packet_handler(u_char *args, const struct pcap_pkthdr *header, const u_char
     const char *REGION_ENV = NULL;
 
     char ipset_query_command[256] = { 0 };
-    //char ip_query_command[256] = { 0 };
 
     // 定义 Response 结构体
     Response response;
@@ -271,7 +270,8 @@ void packet_handler(u_char *args, const struct pcap_pkthdr *header, const u_char
             fprintf(stderr, "Failed to parse JSON.\n");
         }
 
-        free(p);
+        if (p != NULL)
+            free(p);
 
     }
 
@@ -334,7 +334,7 @@ void cleanup_(int signum)
     pcap_freealldevs(alldevs);  // 释放设备列表
     //pcap_close(handle);         // 关闭会话句柄
 
-    // 退出主进程 
+    // 退出主进程
     exit(0);
 
     return;