TCP拥塞控制编程实验

• 实验环境

操作系统为Windows的计算机，安装有C、C++、Java、Python等编程工具。

• 实验步骤/过程

#include

using namespace std;

int main()

{

    int sst=0;//初始阈值

    int n=0;//传输轮次

    int m=0;//快重传的报文段

    int i=1;//打印传输轮次

    int cwnd=1;

    printf("\n");

    printf("ssthrest的初始值:\n");

    scanf("%d",&sst);

    printf("需要模拟的传输轮次数n:\n");

    scanf("%d",&n);

    printf("快重传的值m:\n");

    scanf("%d",&m);

    int t=0;

    int temp=0;

    //慢开始

    printf("\n拥塞窗口cwnd:");

    printf("\n慢开始:");

    if(cwnd

        for(cwnd;cwnd

        {

            printf("%d  ",cwnd);

            t++;

            cwnd=2*cwnd;

        }

        cwnd=sst;

        printf("%d  ",cwnd);

    }

    //拥塞避免

    printf("\n拥塞避免:");

    if(cwnd==sst){

        for(cwnd;cwnd

            cwnd++;

            printf("%d  ",cwnd);

            t++;

        }

    }

    //快重传

    if(cwnd==m){

        sst=cwnd/2;

        printf("\n快重传慢开始:");

        temp=t;

        for(i=t;i<=n;) {

            for(cwnd=1;cwnd

            {

                printf("%d  ",cwnd);

                i++;

                t++;

                cwnd=2*cwnd;

            }

            cwnd=sst;

            for(;i

                printf("%d  ",cwnd);

                cwnd++;

                t++;

            }

        }

    }

    cwnd=sst;

    printf("\n快恢复:");

    for(i=temp;i

        printf("%d  ",cwnd);

        cwnd++;

    }

}

• 实验结果