network.c

福建博洋教育C/C++软件项目实战Linux网络编程阶段:FTP服务器开发

#include "NetWork.h"

#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <errno.h>
#include <stdio.h>

/* model:1 客户端 
 * model:2 服务端
 */
int NetContral(char *addr, int port, int bPort, int model)
{
	int Socket, opt = 1, rt;

	struct sockaddr_in Address;
	memset(&Address, 0, sizeof(Address));

	Address.sin_family = AF_INET;
	if (model == 2)
		Address.sin_addr.s_addr = htonl(INADDR_ANY);
	else if (model == 1 && addr != NULL)
		Address.sin_addr.s_addr = inet_addr(addr);
	else
		return CLIENT_HOST_NOT_NULL;

	Address.sin_port = htons(port);

	if ((Socket = socket(AF_INET, SOCK_STREAM, 0)) == -1)
		return NETWORK_GETSOCKET_FAIL;
	setsockopt(Socket, SOL_SOCKET, SO_REUSEADDR, (const void *)&opt, sizeof(opt));

	if (model == 1 && bPort != -1)
	{
		struct sockaddr_in aAddress;
		memset(&aAddress, 0, sizeof(aAddress));

		aAddress.sin_addr.s_addr = htonl(INADDR_ANY);
		aAddress.sin_port		 = htons(bPort);

		if (bind(Socket, (struct sockaddr *)&aAddress, sizeof(aAddress)) == -1)
			return CLIENT_BIND_EXCEPTION;
	}

	if (model == 1 && ((rt = connect(Socket, (struct sockaddr *)&Address, sizeof(Address))) != -1))
		return Socket;
	else if (rt == -1)
		return CLIENT_CONNECT_FAIL;

	if (bind(Socket, (struct sockaddr *)&Address, sizeof(Address)) < 0)
		return SERVER_BIND_EXCEPTION;
	if (listen(Socket, 5) <0)
		return SERVER_LISTEN_EXCEPTION;
	else
		return Socket;
}