tcp协议滑动窗口源代码
时间: 2023-06-17 09:06:43 浏览: 66
下面是一个简单的 TCP 滑动窗口实现的源代码,基于 Linux 系统的 socket 编程:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#define SERVER_PORT 8080
#define SERVER_IP "127.0.0.1"
#define BUFFER_SIZE 1024
int main() {
int client_fd;
struct sockaddr_in server_addr;
char buffer[BUFFER_SIZE];
int window_start = 0;
int window_size = 5;
int end = window_start + window_size - 1;
int i, j;
// 创建客户端 socket
if ((client_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(EXIT_FAILURE);
}
// 初始化服务端地址结构体
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(SERVER_PORT);
server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
// 连接服务端
if (connect(client_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
perror("connect");
exit(EXIT_FAILURE);
}
// 发送数据
for (i = window_start; i <= end; ++i) {
snprintf(buffer, BUFFER_SIZE, "Packet %d", i);
send(client_fd, buffer, strlen(buffer), 0);
}
// 接收确认数据
while (1) {
int ack;
recv(client_fd, &ack, sizeof(int), 0);
printf("Received ACK %d\n", ack);
if (ack == end + 1) {
printf("All packets have been acknowledged\n");
break;
} else {
window_start = ack;
end = window_start + window_size - 1;
for (j = window_start; j <= end; ++j) {
snprintf(buffer, BUFFER_SIZE, "Packet %d", j);
send(client_fd, buffer, strlen(buffer), 0);
}
}
}
close(client_fd);
return 0;
}
```
这个简单的示例程序中,客户端和服务端使用 TCP 通信,并且客户端实现了滑动窗口的功能,以确保数据的可靠传输。
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