更新 common.h

common.h

@@ -3,15 +3,20 @@
 
 #include <stdint.h>
 
-#define DATA_LEN 512
+#define TYPE_DATA 0
-#define TYPE_DATA 1
+#define TYPE_ACK  1
-#define TYPE_ACK  2
 
-typedef struct {
+#define PORT 9000
-    uint8_t type;      // DATA or ACK
+#define BUF_SIZE 1024
-    uint8_t seq;       // 序号 0 / 1
+#define TIMEOUT_SEC 2
-    uint16_t length;   // 数据长度
+
-    char data[DATA_LEN];
+/* 应用层协议数据包 */
-} packet_t;
+#pragma pack(push, 1)
+struct packet {
+    uint8_t seq;          // 停等协议序号：0 / 1
+    uint8_t type;         // 0=DATA, 1=ACK
+    char payload[BUF_SIZE - 2];
+};
+#pragma pack(pop)
 
 #endif