Golang C.GeoIP_last_netmask类(方法)实例源码

// GetCountry_v6 works the same as GetCountry except for IPv6 addresses, be sure to
// load a database with IPv6 data to get any results.
func (gi *GeoIP) GetCountry_v6(ip string) (cc string, netmask int) {
	if gi.db == nil {
		return
	}

	gi.mu.Lock()
	defer gi.mu.Unlock()

	cip := C.CString(ip)
	defer C.free(unsafe.Pointer(cip))
	ccountry := C.GeoIP_country_code_by_addr_v6(gi.db, cip)
	if ccountry != nil {
		cc = C.GoString(ccountry)
		netmask = int(C.GeoIP_last_netmask(gi.db))
		return
	}
	return
}

// Takes an IPv4 address string and returns the country code for that IP
// and the netmask for that IP range.
func (gi *GeoIP) GetCountry(ip string) (cc string, netmask int) {
	if gi.db == nil {
		return
	}

	gi.mu.Lock() // Lock to make sure we get the right result from GeoIP_last_netmask
	defer gi.mu.Unlock()

	cip := C.CString(ip)
	defer C.free(unsafe.Pointer(cip))
	ccountry := C.GeoIP_country_code_by_addr(gi.db, cip)

	if ccountry != nil {
		cc = C.GoString(ccountry)
		netmask = int(C.GeoIP_last_netmask(gi.db))
		return
	}
	return
}

// Same as GetName() but for IPv6 addresses.
func (gi *GeoIP) GetNameV6(ip string) (name string, netmask int) {
	if gi.db == nil {
		return
	}

	gi.mu.Lock()
	defer gi.mu.Unlock()

	cip := C.CString(ip)
	defer C.free(unsafe.Pointer(cip))
	cname := C.GeoIP_name_by_addr_v6(gi.db, cip)

	if cname != nil {
		name = C.GoString(cname)
		defer C.free(unsafe.Pointer(cname))
		netmask = int(C.GeoIP_last_netmask(gi.db))
		return
	}
	return
}