判断多个IP是否合法

BOOL GetIPAddress(HWND hwnd)
{

	HWND hwndIP;
	char str[MAX_PATH] = "\0";
	int iLength;
	//取得IP地址
	hwndIP = GetDlgItem(hwnd, IDE_IPEDIT);
	iLength = GetWindowTextLength(hwndIP);
	GetWindowTextA(hwndIP, str, iLength+1);
	//如果没找到','符号，直接调用IsIPAddress
	if (strchr(str, ',') == NULL)
	{
		if (IsIPAddress(hwnd, str))
		{
			strcpy(g_szIPAddress, str);
			return TRUE;
		}
		else
		{
			return FALSE;
		}
	}
	
	char *pTemp = NULL;
	int iCount = 0;   //存放ip个数
	//获得ip个数
	pTemp = strchr(str, ',');
	while (pTemp != NULL)
	{
		iCount++;
		pTemp++;
		pTemp = strchr(pTemp, ',');
	}

	char *pp;         //存放每次找到','符号后面的地址
	char *pStr[MAX_PATH] = {NULL};  //存放ip指针
	int i = 0;
	//分别取出ip,保存在pStr
	char *p = strchr(str, ',');
	*p = '\0';
	pStr[i++] = str;
	p++;
	while (p != NULL)
	{
		pp = p;
		p = strchr(pp, ',');
		if (p != NULL)
		{
			*p = '\0';
			pStr[i++] = pp;
			p++;

		}
		else
		{
			pStr[i++] = pp;
		}
	}

	int mask = 0;   //用来判断是否有合法的ip
	ZeroMemory(g_szIPAddress, sizeof(g_szIPAddress));
	//调用IsIPAddress，如果ip合法 就存放在g_szIPAddress
	for (int y = 0; y < iCount; y++)
	{
		if (IsIPAddress(hwnd, pStr[y]))
		{
			strcat(g_szIPAddress, pStr[y]);
			if (y != (iCount - 1))
			{
				strcat(g_szIPAddress, ",");
			}
			mask++;
		}
	}
	//至少要有一个合法的ip，否则放回FALSE
	if (mask > 0)
	{
		return TRUE;
	}
	else if (mask == 0)
	{
		return FALSE;
	}

	return TRUE;
}

BOOL IsIPAddress(HWND hwnd, char *str)
{

	char *pTemp = NULL;
	int iCount = 0;
	//获得ip有几个 '.'
	pTemp = strchr(str, '.');
	while (pTemp != NULL)
	{
		iCount++;
		pTemp++;
		pTemp = strchr(pTemp, '.');
	}
	if (iCount != 3)
	{
		return FALSE;
	}

	const char *pChar;
	bool rv = true;
	int tmp1, tmp2, tmp3, tmp4, i;

	i = sscanf(str, "%d.%d.%d.%d", &tmp1, &tmp2, &tmp3, &tmp4);

	if( i != 4 )
	{
		return FALSE;
	}

	if ((tmp1 > 255) || (tmp2 > 255) || (tmp3 > 255) || (tmp4 > 255))
	{
		return FALSE;
	}

	for (pChar = str; *pChar != 0; pChar++)
	{
		if ((*pChar != '.') && ((*pChar < '0') || (*pChar > '9')))
		{
			return FALSE;
		}
	}
	return TRUE;
}