tcp实现简单的文件传输

//tcp_sc.h
#ifndef TCP_SC_H_
#define TCP_SC_H_
#include<sys/types.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<string.h>
void server_init(int &listenfd,struct sockaddr_in &serveraddr,int port){
	bzero(&serveraddr,sizeof(serveraddr));
	listenfd = socket(AF_INET,SOCK_STREAM,0);
	serveraddr.sin_family = AF_INET;
	serveraddr.sin_port = htons(port);
	serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
	bind(listenfd,(struct sockaddr*)&serveraddr,sizeof(serveraddr));
	listen(listenfd,1000);
}
void client_init(int &connfd,struct sockaddr_in &serveraddr,char *src,int port){
	bzero(&serveraddr,sizeof(serveraddr));
	connfd = socket(AF_INET,SOCK_STREAM,0);
	serveraddr.sin_family = AF_INET;
	serveraddr.sin_port = htons(port);
	inet_pton(AF_INET,src,&serveraddr.sin_addr);
	connect(connfd,(struct sockaddr*)&serveraddr,sizeof(serveraddr));
}
#endif

//tcp_copy_server.cpp
#include"tcp_sc.h"
#include<stdio.h>
#include<unistd.h>
int main(){
	int listenfd,connfd;
	struct sockaddr_in serveraddr;
	server_init(listenfd,serveraddr,12345);
	while(true){
		connfd = accept(listenfd,(struct sockaddr*)NULL,NULL);
		int buf_size = 1000*1000;
		unsigned char buf[buf_size];
		char path[1000];
		read(connfd,path,1000);
		FILE * file = fopen(path,"r");
		printf("%sn",path);
		int n;
		while((n = fread(buf,sizeof(unsigned char),buf_size,file)) > 0){
			write(connfd,buf,n);
		}
		close(connfd);
		fclose(file);
	}
	return 0;
}

//tcp_copy_client.cpp
#include"tcp_sc.h"
#include<stdio.h>
#include<unistd.h>
int main(int argc,char *argv[]){
	int port;
	struct sockaddr_in serveraddr;
	int connfd;
	client_init(connfd,serveraddr,argv[1],12345);
	FILE *file = fopen(argv[3],"w+");
	int n;
	int buf_size = 1000*1000;
	char buf[buf_size];
	printf("%sn",argv[2]);
	write(connfd,argv[2],strlen(argv[2])+1);
	while((n = read(connfd,buf,buf_size)) > 0){
		fwrite(buf,sizeof(unsigned char),n,file);
	}
	fclose(file);
	close(connfd);
}