how to broadcast message from windows to linux?

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include </winsock2.h>

#define MYPORT 7000	// the port users will be connecting to

#define MAXBUFLEN 1024*3

int main(void)
{
	int sockfd;
	struct sockaddr_in my_addr;	// my address information
	struct sockaddr_in their_addr; // connector's address information
	socklen_t addr_len;
	int numbytes;
	char buf[MAXBUFLEN];

	if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
		perror("socket");
		exit(1);
	}

	my_addr.sin_family = AF_INET;		 // host byte order
	my_addr.sin_addr.s_addr = INADDR_ANY; // automatically fill with my IP
	my_addr.sin_port = htons(MYPORT);	 // short, network byte order
	memset(&(my_addr.sin_zero), '\0', 8); // zero the rest of the struct

	int opt = 1;

        if(setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, (char*)&opt, sizeof(int)))
        {
		perror("setsockopt");
		exit(1);	
        }
	if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1)
        {
		perror("bind");
		exit(1);
	}
	addr_len = sizeof(struct sockaddr);
	if ((numbytes = recvfrom(sockfd, buf, MAXBUFLEN-1 , 0,
		(struct sockaddr *)&their_addr, &addr_len)) == -1) {
		perror("recvfrom");
		exit(1);
	}
	printf("got packet from %s\n",inet_ntoa(their_addr.sin_addr));
	printf("packet is %d bytes long\n",numbytes);
	buf[numbytes] = '\0';
	printf("packet contains \"%s\"\n",buf);
	close(sockfd);

	return 0;
}

// Broadcast.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#pragma comment (lib,"ws2_32.lib")
#include <winsock2.h>

int _tmain(int argc, _TCHAR* argv[])
{
	WSADATA wsaData;
	unsigned short wVersionRequested = MAKEWORD( 2, 2 );
	int err = WSAStartup(wVersionRequested, &wsaData);

	SOCKET s = ::socket(AF_INET, SOCK_DGRAM, 0);
	// 有效SO_BROADCAST选项
	BOOL bBroadcast = TRUE;
	::setsockopt(s, SOL_SOCKET, SO_BROADCAST, (char*)&bBroadcast, sizeof(BOOL));
	SOCKADDR_IN bcast;
	bcast.sin_family = AF_INET;
	bcast.sin_addr.s_addr =  ::inet_addr("255.255.255.255"/*"192.168.0.101"*/);
	bcast.sin_port = htons(7000);
	char *buffer = new char[200];
	memset(buffer, 0, sizeof(char)*200);
	sprintf(buffer,"this is from broadcast!");
	int iRe = -1;
	iRe= sendto(s,(const char*)buffer,strlen(buffer),0,(const sockaddr*)(&bcast),sizeof(sockaddr_in));
	if (iRe < 0)
	{
		DWORD dw = GetLastError();
		WSACleanup();
		printf("发送失败！\n");
	}
	else
	{
		printf("发送字节数：%d！\n", iRe);
	}
	WSACleanup();
	return 0;
}