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api "github.com/bio-routing/bio-rd/net/api"
// IP represents an IPv4 or IPv6 address
type IP struct {
higher uint64
lower uint64
isLegacy bool
}
// IPFromProtoIP creates an IP address from a proto IP
func IPFromProtoIP(addr api.IP) IP {
return IP{
higher: addr.Higher,
lower: addr.Lower,
isLegacy: addr.Version == api.IP_IPv4,
}
}
// ToProto converts an IP to a proto IP
func (ip IP) ToProto() *api.IP {
Lower: ip.lower,
Higher: ip.higher,
Version: ver,
}
}
// Lower gets the lower half of the IP address
func (ip IP) Lower() uint64 {
return ip.lower
}
// Higher gets the higher half of the IP address
func (ip IP) Higher() uint64 {
return ip.higher
}
// IPv4 returns a new `IP` representing an IPv4 address
// IPv4FromOctets returns an IPv4 address for the given 4 octets
func IPv4FromOctets(o1, o2, o3, o4 uint8) IP {
return IPv4(uint32(o1)<<24 + uint32(o2)<<16 + uint32(o3)<<8 + uint32(o4))
}
// IPv6 returns a new `IP` representing an IPv6 address
func IPv6(higher, lower uint64) IP {
return IP{
// IPv6FromBlocks returns an IPv6 address for the given 8 blocks
func IPv6FromBlocks(b1, b2, b3, b4, b5, b6, b7, b8 uint16) IP {
return IPv6(
uint64(uint64(b1)<<48+uint64(b2)<<32+uint64(b3)<<16+uint64(b4)),
uint64(uint64(b5)<<48+uint64(b6)<<32+uint64(b7)<<16+uint64(b8)))
}
// IPFromBytes returns an IP address for a byte slice
func IPFromBytes(b []byte) (IP, error) {
if len(b) == 4 {
return IPv4FromOctets(b[0], b[1], b[2], b[3]), nil
}
if len(b) == 16 {
return IPv6FromBlocks(
uint16(b[0])<<8+uint16(b[1]),
uint16(b[2])<<8+uint16(b[3]),
uint16(b[4])<<8+uint16(b[5]),
uint16(b[6])<<8+uint16(b[7]),
uint16(b[8])<<8+uint16(b[9]),
uint16(b[10])<<8+uint16(b[11]),
uint16(b[12])<<8+uint16(b[13]),
uint16(b[14])<<8+uint16(b[15])), nil
}
return IP{}, fmt.Errorf("byte slice has an invalid length. Expected either 4 (IPv4) or 16 (IPv6) bytes but got: %d", len(b))
// IPFromString returns an IP address for a given string
func IPFromString(str string) (IP, error) {
ip := net.ParseIP(str)
if ip == nil {
return IP{}, fmt.Errorf("%s is not a valid IP address", str)
}
ip4 := ip.To4()
if ip4 != nil {
return IPFromBytes(ip4)
}
return IPFromBytes(ip.To16())
}
// Equal returns true if ip is equal to other
func (ip IP) Equal(other IP) bool {
// Compare compares two IP addresses (returns 0 if equal, -1 if `ip` is smaller than `other`, 1 if `ip` is greater than `other`)
return 0
}
if ip.higher > other.higher {
return 1
}
if ip.higher < other.higher {
return -1
}
if ip.lower > other.lower {
return 1
}
return -1
}
return ip.stringIPv6()
}
return ip.stringIPv4()
}
func (ip IP) stringIPv6() string {
return fmt.Sprintf("%X:%X:%X:%X:%X:%X:%X:%X",
ip.higher&0xFFFF000000000000>>48,
ip.higher&0x0000FFFF00000000>>32,
ip.higher&0x00000000FFFF0000>>16,
ip.higher&0x000000000000FFFF,
ip.lower&0xFFFF000000000000>>48,
ip.lower&0x0000FFFF00000000>>32,
ip.lower&0x00000000FFFF0000>>16,
ip.lower&0x000000000000FFFF)
}
func (ip IP) stringIPv4() string {
b := ip.Bytes()
return fmt.Sprintf("%d.%d.%d.%d", b[0], b[1], b[2], b[3])
}
// Bytes returns the byte representation of an IP address
func (ip IP) Bytes() []byte {
return ip.bytesIPv6()
}
return ip.bytesIPv4()
func (ip IP) bytesIPv4() []byte {
return []byte{
byte(u & 0xFF000000 >> 24),
byte(u & 0x00FF0000 >> 16),
byte(u & 0x0000FF00 >> 8),
byte(u & 0x000000FF),
}
}
// IsIPv4 returns if the `IP` is of address family IPv4
func (ip IP) IsIPv4() bool {
}
// SizeBytes returns the number of bytes required to represent the `IP`
func (ip IP) SizeBytes() uint8 {
return 4
}
return 16
}
// ToUint32 return the rightmost 32 bits of an 'IP'
func (ip IP) ToUint32() uint32 {
return uint32(^uint64(0) >> 32 & ip.lower)
}
func (ip IP) bytesIPv6() []byte {
return []byte{
byte(ip.higher & 0xFF00000000000000 >> 56),
byte(ip.higher & 0x00FF000000000000 >> 48),
byte(ip.higher & 0x0000FF0000000000 >> 40),
byte(ip.higher & 0x000000FF00000000 >> 32),
byte(ip.higher & 0x00000000FF000000 >> 24),
byte(ip.higher & 0x0000000000FF0000 >> 16),
byte(ip.higher & 0x000000000000FF00 >> 8),
byte(ip.higher & 0x00000000000000FF),
byte(ip.lower & 0xFF00000000000000 >> 56),
byte(ip.lower & 0x00FF000000000000 >> 48),
byte(ip.lower & 0x0000FF0000000000 >> 40),
byte(ip.lower & 0x000000FF00000000 >> 32),
byte(ip.lower & 0x00000000FF000000 >> 24),
byte(ip.lower & 0x0000000000FF0000 >> 16),
byte(ip.lower & 0x000000000000FF00 >> 8),
byte(ip.lower & 0x00000000000000FF),
}
// ToNetIP converts the IP address in a `net.IP`
func (ip IP) ToNetIP() net.IP {
return net.IP(ip.Bytes())
}
// BitAtPosition returns the bit at position pos
func (ip IP) BitAtPosition(pos uint8) bool {
}
func (ip IP) bitAtPositionIPv4(pos uint8) bool {
if pos > 32 {
return false
}
return (ip.ToUint32() & (1 << (32 - pos))) != 0
}
func (ip IP) bitAtPositionIPv6(pos uint8) bool {
if pos > 128 {
return false
}
if pos <= 64 {
return (ip.higher & (1 << (64 - pos))) != 0
}
return (ip.lower & (1 << (128 - pos))) != 0