TCP通信程序

#发端
#include "head.h"int main(void)
{	int sockfd = 0;ssize_t nsize =0;struct sockaddr_in recvaddr;char tmpbuff[1024];int ret = 0;int fd = 0; int nret = 0;sockfd = socket(AF_INET,SOCK_STREAM,0);  /* 流式套接字 */if(-1==sockfd){perror("fail to socket");return -1;}recvaddr.sin_family =AF_INET;recvaddr.sin_port = htons(50000);recvaddr.sin_addr.s_addr = inet_addr("192.168.1.156");ret = connect(sockfd,(struct sockaddr *)&recvaddr,sizeof(recvaddr));if(-1==ret){perror("fail to connect");return -1;}printf("请输入发送文件名");gets(tmpbuff);nsize = send(sockfd,tmpbuff,strlen(tmpbuff),0);if(-1==nsize){perror("fail to send");return -1;}sleep(1);fd = open(tmpbuff,O_RDONLY);while(1){memset(tmpbuff,0,sizeof(tmpbuff));nret = read(fd,tmpbuff,sizeof(tmpbuff));if(nret<=0){break;}nsize = send(sockfd,tmpbuff,nret,0);}close(fd);	close(sockfd);return 0;
}

//接收端
#include "head.h"int main(void)
{	int sockfd = 0;//socket->bind->listen->accept->recv->closessize_t nsize =0;struct sockaddr_in recvaddr;char tmpbuff[1024];int ret = 0; int confd = 0;int fd = 0; sockfd = socket(AF_INET,SOCK_STREAM,0);  /* 流式套接字 */if(-1==sockfd){perror("fail to socket");return -1;}recvaddr.sin_family =AF_INET;recvaddr.sin_port = htons(50000);recvaddr.sin_addr.s_addr = inet_addr("192.168.1.156");/*INADDR_ANY*/ret = bind(sockfd,(struct sockaddr *)&recvaddr,sizeof(recvaddr));ret =  listen(sockfd,10);confd = accept(sockfd,NULL,NULL);nsize = recv(confd,tmpbuff,sizeof(tmpbuff),0);fd = open(tmpbuff,O_WRONLY|O_CREAT|O_TRUNC,0664);while(1){nsize = recv(confd,tmpbuff,sizeof(tmpbuff),0);if(nsize == 0){break;}write(fd,tmpbuff,nsize);}close(fd);close(confd);close(sockfd);return 0;
}