IPV6广播的的问题?

na_he 2010-10-18 10:57:55

现将原有的IP4的广播程式支持IP6，程序可以发送成功，但接受只有本机可以接受到广播信息，局域网内的其他机器不能收到。现有两个问题请教：

1.IP6组播或者或者广播的地址是不是特定的，是多少呢？我目前用几个尝试了，好像都不可以。不如::1等。

2.inet_ntop函数怎么使用不了呢。在VS2008下提示ws2_32.dll找不到入口点.

int resolve_v6 (const char * hostname,	struct sockaddr_in6* addr) 

{

	struct addrinfo hints;

	struct addrinfo *result;

	memset (&hints, 0, sizeof (struct addrinfo));

	hints.ai_family = AF_INET6;

	getaddrinfo (hostname, NULL, &hints, &result);

//	assert(sizeof(struct sockaddr_in6)==result->ai_addrlen);

	memcpy (addr, result->ai_addr, result->ai_addrlen);

	freeaddrinfo (result);

	return 0;

}



void  main(int argc, char **argv)

{

	WSADATA wsaData; 

		SOCKET sockListener;

		SOCKADDR_IN saUdpCli,saUdpServ;

		BOOL fBroadcast = TRUE;



	

		char sendBuff[40]= //SNMP查询包内容

		{ 

			'\x30','\x26','\x02','\x01','\x00', 

				'\x04','\x06','\x70','\x75','\x62', 

				'\x6c','\x69','\x63','\xa0','\x19', 

				'\x02','\x01','\x03','\x02','\x01', 

				'\x00','\x02','\x01','\x00','\x30', 

				'\x0e','\x30','\x0c','\x06','\x08', 

				'\x2b','\x06','\x01','\x02','\x01', 

				'\x01','\x01','\x00','\x05','\x00' 

		}; 

		char recvBuff[600]; 

		int nSize,err,timeoutnum = 1;;

		ULONG HostIpAddr;

		int rv; 

		int ncount=0; 

		

		if(WSAStartup(MAKEWORD( 2, 2),&wsaData)!=0) 

		{

			printf("Winsocket start error!\n");

			return; 

		}

		memset (&saUdpCli, 0, sizeof (saUdpCli));



	struct sockaddr_in6 server_addr;

		memset((void *)&server_addr,0,sizeof(server_addr));

       ;



		server_addr.sin6_family = AF_INET6 ; /* ipv6 */

		server_addr.sin6_port = htons(0);

		server_addr.sin6_addr = in6addr_any;



		if(bind (listen_fd, (SOCKADDR *)&server_addr, sizeof (struct sockaddr_in6))!=0)

		{

			printf("Can't bind socket to local port!Program stop.\n");

			return; 

		}

		

		struct sockaddr_in6 addrsvr;

		memset (&addrsvr, 0, sizeof (sockaddr_in6));



		err = gethostname(recvBuff,sizeof(recvBuff));

		resolve_v6("FF12::1",&addrsvr);//"fe80::54d2::6be3:410a:9438%11"

		addrsvr.sin6_family=AF_INET6;

		addrsvr.sin6_port=htons(161);

		if((rv = sendto ( listen_fd,

			sendBuff,

			sizeof(sendBuff),0,

			(SOCKADDR *) &addrsvr,

			sizeof ( struct sockaddr_in6 )))==SOCKET_ERROR) 

		{ 

			printf("Send error!\n");

			closesocket(sockListener); 

			return; 

		} 

		printf("Send successful!\n");





		struct sockaddr_in6 client_addr;

		memset((void *)&client_addr,0,sizeof(client_addr));

		int sockaddr_len = sizeof(struct sockaddr_in6);



		do // waiting to receive

		{

			if((rv=recvfrom ( listen_fd,

				recvBuff,sizeof(recvBuff),0,

				(SOCKADDR *) &client_addr,&sockaddr_len))==SOCKET_ERROR) 

			{ 

				if(WSAGetLastError()==WSAETIMEDOUT)

				{

					if (timeoutnum > 1 ) //Wait for 1 minute.

						break;

					else

						timeoutnum++;

				//sprintf("Error \n");

					

				}

			}

			else

			{

				char szIP[256];

				//strcpy(szIP,inet_ntoa ( saUdpCli.sin_addr));

				//	CString Ip(inet_ntoa ( saUdpCli.sin_addr ));

				

			//	sprintf("\t IP Adress->%s \n",szIP);

			} 

			

		}while(TRUE);

		closesocket(sockListener); 

		WSACleanup();

		}