Linux学习笔记(c):TCP客户端向服务器端传输照片

客户端

#include 
#include 
#include 
#include 
#include           /* See NOTES */
#include 
#include 
#include 
#include 
#include  /* superset of previous */
#include 
#include 
#include 

typedef struct sockaddr*(SA);

int main(int argc, const char *argv[])
{
	int conn = socket(AF_INET,SOCK_STREAM,0);
	if(-1 == conn)
	{
		perror("conn error!\n");
		exit(1);
	}
	
	struct sockaddr_in ser;
	bzero(&ser,sizeof(ser));
	ser.sin_family = AF_INET;
	ser.sin_port = htons(50000);
	ser.sin_addr.s_addr = inet_addr("192.168.1.139");
	int ret = connect(conn,(SA)&ser,sizeof(ser));
	if(-1 == ret)
	{
		perror("connect error!\n");
		exit(1);
	}
	char buf[1024] = {0};
	int fd = open("/home/linux/11.jpg",O_RDONLY);
	if(-1 == fd)
	{
		perror("open error!\n");
		exit(1);
	}

	while(1)
	{	
		int rd_num = read(fd,buf,1024);
		if(0 == rd_num)
		{
			break;
		}
		send(conn,buf,rd_num,0);
		bzero(buf,sizeof(buf));
	}

	close(fd);
	close(conn);
	return 0;
}

服务器端

#include 
#include 
#include 
#include 
#include           /* See NOTES */
#include 
#include 
#include 
#include 
#include  /* superset of previous */
#include 
#include 
#include 


typedef struct sockaddr*(SA);

int main(int argc, const char *argv[])
{
	int listfd = socket(AF_INET,SOCK_STREAM,0);
	if(-1 == listfd)
	{
		perror("socket error!\n");
		exit(1);
	}
	
	struct sockaddr_in ser,cli;
	bzero(&ser,sizeof(ser));
	bzero(&cli,sizeof(cli));
	ser.sin_family = AF_INET;
	ser.sin_port = htons(50000);
	ser.sin_addr.s_addr = INADDR_ANY;
	int ret = bind(listfd,(SA)&ser,sizeof(ser));
	if(-1 == ret)
	{
		perror("bind error!\n");
		exit(1);
	}
	listen(listfd,3);
	int len = sizeof(cli);
	int conn = accept(listfd,(SA)&cli,&len);
	if(-1 == conn)
	{
		perror("accept error!\n");
		exit(1);
	}
	int fd = open("./1.jpg",O_WRONLY|O_CREAT|O_TRUNC,0666);
	if(-1 == fd)
	{
		perror("open error!\n");
		exit(1);
	}
	while(1)
	{
		char buf[1024] = {0};
		int rd = recv(conn,buf,sizeof(buf),0);
		if(0 == rd)//客户端断开退出
		{
			break;
		}
		write(fd,buf,rd);
		bzero(buf,sizeof(buf));
	}
	close(fd);
	close(listfd);
	close(conn);
	return 0;
}