add 203 codes

Blatt02/A203/arp_packet_st.h

@@ -0,0 +1,36 @@
+#ifndef ARP_PACKET_ST_H
+#define ARP_PACKET_ST_H
+
+#define MAC_A_S 6
+
+#include<stdint.h>
+#include<stddef.h>
+
+typedef struct{
+	uint8_t dest_ares[MAC_A_S];
+	uint8_t send_ares[MAC_A_S];
+	uint16_t pro_T;
+}mac_hdr;
+
+typedef struct{
+	uint16_t ar_hrd;
+	uint16_t ar_pro;
+	uint8_t ar_hln;
+	uint8_t ar_pln;
+	uint16_t ar_op;
+	uint8_t ar_sha[MAC_A_S];
+	uint32_t ar_spa;
+	uint8_t ar_tha[MAC_A_S];
+	uint32_t ar_tpa;
+}pkt_data;
+
+typedef struct{
+	uint16_t ar_pro;
+	uint32_t ar_spa;
+	uint8_t ar_sha[MAC_A_S];
+	int count;
+}translation_table_entry;
+
+#endif
+
+