func parseRoutingSockaddrs(m syscall.RoutingMessage) ([]syscall.Sockaddr, error) {
switch m := m.(type) {
case *syscall.RouteMessage:
sas, err := syscall.ParseRoutingSockaddr(m)
if err != nil {
return nil, fmt.Errorf("%T: %v, %#v", m, err, m.Data)
}
if err = sockaddrs(sas).match(addrFlags(m.Header.Addrs)); err != nil {
return nil, err
}
return sas, nil
case *syscall.InterfaceMessage:
sas, err := syscall.ParseRoutingSockaddr(m)
if err != nil {
return nil, fmt.Errorf("%T: %v, %#v", m, err, m.Data)
}
if err = sockaddrs(sas).match(addrFlags(m.Header.Addrs)); err != nil {
return nil, err
}
return sas, nil
case *syscall.InterfaceAddrMessage:
sas, err := syscall.ParseRoutingSockaddr(m)
if err != nil {
return nil, fmt.Errorf("%T: %v, %#v", m, err, m.Data)
}
if err = sockaddrs(sas).match(addrFlags(m.Header.Addrs)); err != nil {
return nil, err
}
return sas, nil
default:
panic(fmt.Sprintf("unknown routing message type: %T", m))
}
}
func newMulticastAddr(m *syscall.InterfaceMulticastAddrMessage) ([]Addr, os.Error) {
var ifmat []Addr
sas, e := syscall.ParseRoutingSockaddr(m)
if e != 0 {
return nil, os.NewSyscallError("route sockaddr", e)
}
for _, s := range sas {
switch v := s.(type) {
case *syscall.SockaddrInet4:
ifma := &IPAddr{IP: IPv4(v.Addr[0], v.Addr[1], v.Addr[2], v.Addr[3])}
ifmat = append(ifmat, ifma.toAddr())
case *syscall.SockaddrInet6:
ifma := &IPAddr{IP: make(IP, IPv6len)}
copy(ifma.IP, v.Addr[:])
// NOTE: KAME based IPv6 protcol stack usually embeds
// the interface index in the interface-local or link-
// local address as the kernel-internal form.
if ifma.IP.IsInterfaceLocalMulticast() ||
ifma.IP.IsLinkLocalMulticast() {
// remove embedded scope zone ID
ifma.IP[2], ifma.IP[3] = 0, 0
}
ifmat = append(ifmat, ifma.toAddr())
}
}
return ifmat, nil
}
func newMulticastAddr(ifi *Interface, m *syscall.InterfaceMulticastAddrMessage) ([]Addr, error) {
sas, err := syscall.ParseRoutingSockaddr(m)
if err != nil {
return nil, os.NewSyscallError("route sockaddr", err)
}
var ifmat []Addr
for _, sa := range sas {
switch sa := sa.(type) {
case *syscall.SockaddrInet4:
ifma := &IPAddr{IP: IPv4(sa.Addr[0], sa.Addr[1], sa.Addr[2], sa.Addr[3])}
ifmat = append(ifmat, ifma.toAddr())
case *syscall.SockaddrInet6:
ifma := &IPAddr{IP: make(IP, IPv6len)}
copy(ifma.IP, sa.Addr[:])
// NOTE: KAME based IPv6 protcol stack usually embeds
// the interface index in the interface-local or link-
// local address as the kernel-internal form.
if ifma.IP.IsInterfaceLocalMulticast() || ifma.IP.IsLinkLocalMulticast() {
ifma.IP[2], ifma.IP[3] = 0, 0
}
ifmat = append(ifmat, ifma.toAddr())
}
}
return ifmat, nil
}
func newLink(m *syscall.InterfaceMessage) (*Interface, error) {
sas, err := syscall.ParseRoutingSockaddr(m)
if err != nil {
return nil, os.NewSyscallError("route sockaddr", err)
}
ifi := &Interface{Index: int(m.Header.Index), Flags: linkFlags(m.Header.Flags)}
for _, sa := range sas {
switch sa := sa.(type) {
case *syscall.SockaddrDatalink:
// NOTE: SockaddrDatalink.Data is minimum work area,
// can be larger.
m.Data = m.Data[unsafe.Offsetof(sa.Data):]
var name [syscall.IFNAMSIZ]byte
for i := 0; i < int(sa.Nlen); i++ {
name[i] = byte(m.Data[i])
}
ifi.Name = string(name[:sa.Nlen])
ifi.MTU = int(m.Header.Data.Mtu)
addr := make([]byte, sa.Alen)
for i := 0; i < int(sa.Alen); i++ {
addr[i] = byte(m.Data[int(sa.Nlen)+i])
}
ifi.HardwareAddr = addr[:sa.Alen]
}
}
return ifi, nil
}
func newAddr(ifi *Interface, m *syscall.InterfaceAddrMessage) (*IPNet, error) {
sas, err := syscall.ParseRoutingSockaddr(m)
if err != nil {
return nil, os.NewSyscallError("parseroutingsockaddr", err)
}
ifa := &IPNet{}
switch sa := sas[syscall.RTAX_NETMASK].(type) {
case *syscall.SockaddrInet4:
ifa.Mask = IPv4Mask(sa.Addr[0], sa.Addr[1], sa.Addr[2], sa.Addr[3])
case *syscall.SockaddrInet6:
ifa.Mask = make(IPMask, IPv6len)
copy(ifa.Mask, sa.Addr[:])
}
switch sa := sas[syscall.RTAX_IFA].(type) {
case *syscall.SockaddrInet4:
ifa.IP = IPv4(sa.Addr[0], sa.Addr[1], sa.Addr[2], sa.Addr[3])
case *syscall.SockaddrInet6:
ifa.IP = make(IP, IPv6len)
copy(ifa.IP, sa.Addr[:])
// NOTE: KAME based IPv6 protcol stack usually embeds
// the interface index in the interface-local or
// link-local address as the kernel-internal form.
if ifa.IP.IsLinkLocalUnicast() {
ifa.IP[2], ifa.IP[3] = 0, 0
}
}
if ifa.IP == nil || ifa.Mask == nil {
return nil, nil // Sockaddrs contain syscall.SockaddrDatalink on NetBSD
}
return ifa, nil
}
func TestParseInterfaceMessage(t *testing.T) {
for i, tt := range parseInterfaceMessageTests {
if _, err := syscall.ParseRoutingSockaddr(tt); err != nil {
t.Errorf("#%d: %v", i, err)
}
}
}
func newLink(m *syscall.InterfaceMessage) ([]Interface, os.Error) {
var ift []Interface
sas, e := syscall.ParseRoutingSockaddr(m)
if e != 0 {
return nil, os.NewSyscallError("route sockaddr", e)
}
for _, s := range sas {
switch v := s.(type) {
case *syscall.SockaddrDatalink:
// NOTE: SockaddrDatalink.Data is minimum work area,
// can be larger.
m.Data = m.Data[unsafe.Offsetof(v.Data):]
ifi := Interface{Index: int(m.Header.Index), Flags: linkFlags(m.Header.Flags)}
var name [syscall.IFNAMSIZ]byte
for i := 0; i < int(v.Nlen); i++ {
name[i] = byte(m.Data[i])
}
ifi.Name = string(name[:v.Nlen])
ifi.MTU = int(m.Header.Data.Mtu)
addr := make([]byte, v.Alen)
for i := 0; i < int(v.Alen); i++ {
addr[i] = byte(m.Data[int(v.Nlen)+i])
}
ifi.HardwareAddr = addr[:v.Alen]
ift = append(ift, ifi)
}
}
return ift, nil
}
func newMulticastAddr(ifi *Interface, m *syscall.InterfaceMulticastAddrMessage) (*IPAddr, error) {
sas, err := syscall.ParseRoutingSockaddr(m)
if err != nil {
return nil, os.NewSyscallError("route sockaddr", err)
}
switch sa := sas[syscall.RTAX_IFA].(type) {
case *syscall.SockaddrInet4:
return &IPAddr{IP: IPv4(sa.Addr[0], sa.Addr[1], sa.Addr[2], sa.Addr[3])}, nil
case *syscall.SockaddrInet6:
ifma := IPAddr{IP: make(IP, IPv6len)}
copy(ifma.IP, sa.Addr[:])
// NOTE: KAME based IPv6 protcol stack usually embeds
// the interface index in the interface-local or
// link-local address as the kernel-internal form.
if ifma.IP.IsInterfaceLocalMulticast() || ifma.IP.IsLinkLocalMulticast() {
ifma.IP[2], ifma.IP[3] = 0, 0
}
return &ifma, nil
default:
return nil, nil
}
}
func newAddr(m *syscall.InterfaceAddrMessage) (Addr, error) {
ifa := &IPNet{}
sas, err := syscall.ParseRoutingSockaddr(m)
if err != nil {
return nil, os.NewSyscallError("route sockaddr", err)
}
for i, s := range sas {
switch v := s.(type) {
case *syscall.SockaddrInet4:
switch i {
case 0:
ifa.Mask = IPv4Mask(v.Addr[0], v.Addr[1], v.Addr[2], v.Addr[3])
case 1:
ifa.IP = IPv4(v.Addr[0], v.Addr[1], v.Addr[2], v.Addr[3])
}
case *syscall.SockaddrInet6:
switch i {
case 0:
ifa.Mask = make(IPMask, IPv6len)
copy(ifa.Mask, v.Addr[:])
case 1:
ifa.IP = make(IP, IPv6len)
copy(ifa.IP, v.Addr[:])
// NOTE: KAME based IPv6 protcol stack usually embeds
// the interface index in the interface-local or link-
// local address as the kernel-internal form.
if ifa.IP.IsLinkLocalUnicast() {
// remove embedded scope zone ID
ifa.IP[2], ifa.IP[3] = 0, 0
}
}
}
}
return ifa, nil
}
func newAddr(m *syscall.InterfaceAddrMessage) (Addr, error) {
sas, err := syscall.ParseRoutingSockaddr(m)
if err != nil {
return nil, os.NewSyscallError("route sockaddr", err)
}
ifa := &IPNet{}
for i, sa := range sas {
switch sa := sa.(type) {
case *syscall.SockaddrInet4:
switch i {
case 0:
ifa.Mask = IPv4Mask(sa.Addr[0], sa.Addr[1], sa.Addr[2], sa.Addr[3])
case 1:
ifa.IP = IPv4(sa.Addr[0], sa.Addr[1], sa.Addr[2], sa.Addr[3])
}
case *syscall.SockaddrInet6:
switch i {
case 0:
ifa.Mask = make(IPMask, IPv6len)
copy(ifa.Mask, sa.Addr[:])
case 1:
ifa.IP = make(IP, IPv6len)
copy(ifa.IP, sa.Addr[:])
// NOTE: KAME based IPv6 protcol stack usually embeds
// the interface index in the interface-local or link-
// local address as the kernel-internal form.
if ifa.IP.IsLinkLocalUnicast() {
ifa.Zone = zoneToString(int(ifa.IP[2]<<8 | ifa.IP[3]))
ifa.IP[2], ifa.IP[3] = 0, 0
}
}
default: // Sockaddrs contain syscall.SockaddrDatalink on NetBSD
return nil, nil
}
}
return ifa, nil
}