continue work

includes/main.h

@@ -12,6 +12,7 @@
 #include <stdbool.h>
 #include <errno.h>
 #include <string.h>
+#include <netinet/ip_icmp.h>
 
 struct arguments {
     char* args[1];
@@ -19,4 +20,9 @@ struct arguments {
     unsigned int ttl;
 };
 
+struct ping_pkt {
+    struct icmphdr hdr;
+    char msg[64 - sizeof(struct icmphdr)];
+};
+
 #endif //MAIN_H