#ifndef COMMON_H
#define COMMON_H

#include <stdint.h>

#define TYPE_DATA 0
#define TYPE_ACK  1

#define PORT 9000
#define BUF_SIZE 1024
#define TIMEOUT_SEC 2

/* 应用层协议数据包 */
#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