基于TCP的半关闭

记录学习 github仓库地址：github.com/skrura/tcp-…

TCP/IP网络编程（尹圣雨）7.1节内容 基于linux c语言

运行操作：file_server.c [yh1@centos Half-close]$ gcc file_client.c -o fclient

[yh1@centos Half-close]$ gcc file_server.c -o fserver

[yh1@centos Half-close]$ ./fserver 9190

Message from cliebnt:Thank you

运行操作：file_client.c

[yh1@centos Half-close]$ gcc file_client.c -o fclient

[yh1@centos Half-close]$ ./fclient 127.0.0.1 9190

Received file data

读取自身文件的内容传输给客户端 file_server.c

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<unistd.h>
#include<arpa/inet.h>
#include<sys/socket.h>

#define BUF_SIZE 30

int main(int argc,char *argv[])
{
	int serv_sd,clnt_sd;
	FILE * fp;
	char buf[BUF_SIZE];
	int read_cnt;

	struct sockaddr_in serv_adr,clnt_adr;
	socklen_t clnt_adr_sz;
	
	if(argc!=2){
	printf("Usage: %s<port>\n",argv[0]);
	exit(1);
	}

	fp=fopen("file_server.c","rb");
	serv_sd = socket(PF_INET,SOCK_STREAM,0);

	memset(&serv_adr,0 ,sizeof(serv_adr));
	serv_adr.sin_family=AF_INET;
	serv_adr.sin_addr.s_addr=htonl(INADDR_ANY);
	serv_adr.sin_port=htons(atoi(argv[1]));

	bind(serv_sd,(struct sockaddr*)& serv_adr, sizeof(serv_adr));
	listen(serv_sd,5);
	
	clnt_adr_sz = sizeof(clnt_adr);
	clnt_sd = accept(serv_sd,(struct sockaddr*)&clnt_adr, &clnt_adr_sz);
	
	while(1)
	{
		read_cnt = fread((void*)buf, 1, BUF_SIZE, fp);
		if(read_cnt<BUF_SIZE)
		{
			write(clnt_sd,buf,read_cnt);
			break;
		}
	write(clnt_sd,buf,BUF_SIZE);
	
	}

	shutdown(clnt_sd,SHUT_WR);
	read(clnt_sd, buf, BUF_SIZE);	
	printf("Message from cliebnt:%s\n",buf);

	fclose(fp);
	close(clnt_sd);
	close(serv_sd);
	return 0;
}

将收到的内容传输到receive.dat文件中

file_client.c

#include<stdlib.h>
#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<arpa/inet.h>
#include<sys/socket.h>

#define BUF_SIZE 30


int main(int argc,char *argv[])
{
	int sd;
	FILE *fp;
	char buf[BUF_SIZE];
	int read_cnt;
	struct sockaddr_in serv_adr;

        if(argc!=3){
       		 printf("Usage: %s<port>\n",argv[0]);
       		 exit(1);
        }

	fp = fopen("receive.dat","wb");
	sd = socket(PF_INET,SOCK_STREAM,0);
	
	memset(&serv_adr, 0 , sizeof(serv_adr));
	serv_adr.sin_family=AF_INET;
	serv_adr.sin_addr.s_addr = inet_addr(argv[1]);
	serv_adr.sin_port = htons(atoi(argv[2]));

	connect(sd,(struct sockaddr*)&serv_adr,sizeof(serv_adr));

	while((read_cnt=read(sd,buf,BUF_SIZE))!=0)
		fwrite((void*)buf,1,read_cnt,fp);
	
	puts("Received file data");
	write(sd,"Thank you",10);
	fclose(fp);
	close(sd);
	return 0;

}