dnsmsg.go\
fd_$(GOOS).go\
hosts.go\
+ interface.go\
ip.go\
ipsock.go\
iprawsock.go\
dnsconfig.go\
fd.go\
file.go\
+ interface_bsd.go\
newpollserver.go\
port.go\
sendfile_stub.go\
dnsconfig.go\
fd.go\
file.go\
+ interface_bsd.go\
newpollserver.go\
port.go\
sendfile_stub.go\
dnsconfig.go\
fd.go\
file.go\
+ interface_linux.go\
newpollserver.go\
port.go\
sendfile_linux.go\
sock_linux.go\
GOFILES_plan9=\
+ interface_stub.go\
sendfile_stub.go\
ifeq ($(GOARCH),arm)
GOFILES_windows=\
cgo_stub.go\
file_windows.go\
+ interface_stub.go\
resolv_windows.go\
sendfile_stub.go\
sock_windows.go\
--- /dev/null
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Network interface identification
+
+package net
+
+import (
+ "bytes"
+ "fmt"
+ "os"
+ "syscall"
+)
+
+// A HardwareAddr represents a physical hardware address.
+type HardwareAddr []byte
+
+func (a HardwareAddr) String() string {
+ var buf bytes.Buffer
+ for i, b := range a {
+ if i > 0 {
+ buf.WriteByte(':')
+ }
+ fmt.Fprintf(&buf, "%02x", b)
+ }
+ return buf.String()
+}
+
+// Interface represents a mapping between network interface name
+// and index. It also represents network interface facility
+// information.
+type Interface struct {
+ Index int // positive integer that starts at one, zero is never used
+ MTU int // maximum transmission unit
+ Name string // e.g., "en0", "lo0", "eth0.100"
+ HardwareAddr HardwareAddr // IEEE MAC-48, EUI-48 and EUI-64 form
+ rawFlags int
+}
+
+// IsUp returns true if ifi is up.
+func (ifi *Interface) IsUp() bool {
+ if ifi == nil {
+ return false
+ }
+ return ifi.rawFlags&syscall.IFF_UP != 0
+}
+
+// IsLoopback returns true if ifi is a loopback interface.
+func (ifi *Interface) IsLoopback() bool {
+ if ifi == nil {
+ return false
+ }
+ return ifi.rawFlags&syscall.IFF_LOOPBACK != 0
+}
+
+// CanBroadcast returns true if ifi supports a broadcast access
+// capability.
+func (ifi *Interface) CanBroadcast() bool {
+ if ifi == nil {
+ return false
+ }
+ return ifi.rawFlags&syscall.IFF_BROADCAST != 0
+}
+
+// IsPointToPoint returns true if ifi belongs to a point-to-point
+// link.
+func (ifi *Interface) IsPointToPoint() bool {
+ if ifi == nil {
+ return false
+ }
+ return ifi.rawFlags&syscall.IFF_POINTOPOINT != 0
+}
+
+// CanMulticast returns true if ifi supports a multicast access
+// capability.
+func (ifi *Interface) CanMulticast() bool {
+ if ifi == nil {
+ return false
+ }
+ return ifi.rawFlags&syscall.IFF_MULTICAST != 0
+}
+
+// Addrs returns interface addresses for a specific interface.
+func (ifi *Interface) Addrs() ([]Addr, os.Error) {
+ if ifi == nil {
+ return nil, os.NewError("net: invalid interface")
+ }
+ return interfaceAddrTable(ifi.Index)
+}
+
+// Interfaces returns a list of the systems's network interfaces.
+func Interfaces() ([]Interface, os.Error) {
+ return interfaceTable(0)
+}
+
+// InterfaceAddrs returns a list of the system's network interface
+// addresses.
+func InterfaceAddrs() ([]Addr, os.Error) {
+ return interfaceAddrTable(0)
+}
+
+// InterfaceByIndex returns the interface specified by index.
+func InterfaceByIndex(index int) (*Interface, os.Error) {
+ if index <= 0 {
+ return nil, os.NewError("net: invalid interface index")
+ }
+ ift, err := interfaceTable(index)
+ if err != nil {
+ return nil, err
+ }
+ for _, ifi := range ift {
+ return &ifi, nil
+ }
+ return nil, os.NewError("net: no such interface")
+}
+
+// InterfaceByName returns the interface specified by name.
+func InterfaceByName(name string) (*Interface, os.Error) {
+ if name == "" {
+ return nil, os.NewError("net: invalid interface name")
+ }
+ ift, err := interfaceTable(0)
+ if err != nil {
+ return nil, err
+ }
+ for _, ifi := range ift {
+ if name == ifi.Name {
+ return &ifi, nil
+ }
+ }
+ return nil, os.NewError("net: no such interface")
+}
--- /dev/null
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Network interface identification for BSD variants
+
+package net
+
+import (
+ "os"
+ "syscall"
+)
+
+// If the ifindex is zero, interfaceTable returns mappings of all
+// network interfaces. Otheriwse it returns a mapping of a specific
+// interface.
+func interfaceTable(ifindex int) ([]Interface, os.Error) {
+ var (
+ tab []byte
+ e int
+ msgs []syscall.RoutingMessage
+ ift []Interface
+ )
+
+ tab, e = syscall.RouteRIB(syscall.NET_RT_IFLIST, ifindex)
+ if e != 0 {
+ return nil, os.NewSyscallError("route rib", e)
+ }
+
+ msgs, e = syscall.ParseRoutingMessage(tab)
+ if e != 0 {
+ return nil, os.NewSyscallError("route message", e)
+ }
+
+ for _, m := range msgs {
+ switch v := m.(type) {
+ case *syscall.InterfaceMessage:
+ if ifindex == 0 || ifindex == int(v.Header.Index) {
+ ifi, err := newLink(v)
+ if err != nil {
+ return nil, err
+ }
+ ift = append(ift, ifi...)
+ }
+ }
+ }
+
+ return ift, nil
+}
+
+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:
+ ifi := Interface{Index: int(m.Header.Index), rawFlags: int(m.Header.Flags)}
+ var name [syscall.IFNAMSIZ]byte
+ for i := 0; i < int(v.Nlen); i++ {
+ name[i] = byte(v.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(v.Data[int(v.Nlen)+i])
+ }
+ ifi.HardwareAddr = addr[:v.Alen]
+ ift = append(ift, ifi)
+ }
+ }
+
+ return ift, nil
+}
+
+// If the ifindex is zero, interfaceAddrTable returns addresses
+// for all network interfaces. Otherwise it returns addresses
+// for a specific interface.
+func interfaceAddrTable(ifindex int) ([]Addr, os.Error) {
+ var (
+ tab []byte
+ e int
+ msgs []syscall.RoutingMessage
+ ifat []Addr
+ )
+
+ tab, e = syscall.RouteRIB(syscall.NET_RT_IFLIST, ifindex)
+ if e != 0 {
+ return nil, os.NewSyscallError("route rib", e)
+ }
+
+ msgs, e = syscall.ParseRoutingMessage(tab)
+ if e != 0 {
+ return nil, os.NewSyscallError("route message", e)
+ }
+
+ for _, m := range msgs {
+ switch v := m.(type) {
+ case *syscall.InterfaceAddrMessage:
+ if ifindex == 0 || ifindex == int(v.Header.Index) {
+ ifa, err := newAddr(v)
+ if err != nil {
+ return nil, err
+ }
+ ifat = append(ifat, ifa...)
+ }
+ }
+ }
+
+ return ifat, nil
+}
+
+func newAddr(m *syscall.InterfaceAddrMessage) ([]Addr, os.Error) {
+ var ifat []Addr
+
+ sas, e := syscall.ParseRoutingSockaddr(m)
+ if e != 0 {
+ return nil, os.NewSyscallError("route sockaddr", e)
+ }
+
+ for _, s := range sas {
+ var ifa IPAddr
+ switch v := s.(type) {
+ case *syscall.SockaddrInet4:
+ ifa.IP = IPv4(v.Addr[0], v.Addr[1], v.Addr[2], v.Addr[3])
+ case *syscall.SockaddrInet6:
+ 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() ||
+ ifa.IP.IsInterfaceLocalMulticast() ||
+ ifa.IP.IsLinkLocalMulticast() {
+ // remove embedded scope zone ID
+ ifa.IP[2], ifa.IP[3] = 0, 0
+ }
+ }
+ ifat = append(ifat, ifa.toAddr())
+ }
+
+ return ifat, nil
+}
--- /dev/null
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Network interface identification for Linux
+
+package net
+
+import (
+ "os"
+ "syscall"
+ "unsafe"
+)
+
+// If the ifindex is zero, interfaceTable returns mappings of all
+// network interfaces. Otheriwse it returns a mapping of a specific
+// interface.
+func interfaceTable(ifindex int) ([]Interface, os.Error) {
+ var (
+ ift []Interface
+ tab []byte
+ msgs []syscall.NetlinkMessage
+ e int
+ )
+
+ tab, e = syscall.NetlinkRIB(syscall.RTM_GETLINK, syscall.AF_UNSPEC)
+ if e != 0 {
+ return nil, os.NewSyscallError("netlink rib", e)
+ }
+
+ msgs, e = syscall.ParseNetlinkMessage(tab)
+ if e != 0 {
+ return nil, os.NewSyscallError("netlink message", e)
+ }
+
+ for _, m := range msgs {
+ switch m.Header.Type {
+ case syscall.NLMSG_DONE:
+ goto done
+ case syscall.RTM_NEWLINK:
+ ifim := (*syscall.IfInfomsg)(unsafe.Pointer(&m.Data[0]))
+ if ifindex == 0 || ifindex == int(ifim.Index) {
+ attrs, e := syscall.ParseNetlinkRouteAttr(&m)
+ if e != 0 {
+ return nil, os.NewSyscallError("netlink routeattr", e)
+ }
+ ifi := newLink(attrs, ifim)
+ ift = append(ift, ifi)
+ }
+ }
+ }
+
+done:
+ return ift, nil
+}
+
+func newLink(attrs []syscall.NetlinkRouteAttr, ifim *syscall.IfInfomsg) Interface {
+ ifi := Interface{Index: int(ifim.Index), rawFlags: int(ifim.Flags)}
+ for _, a := range attrs {
+ switch a.Attr.Type {
+ case syscall.IFLA_ADDRESS:
+ var nonzero bool
+ for _, b := range a.Value {
+ if b != 0 {
+ nonzero = true
+ }
+ }
+ if nonzero {
+ ifi.HardwareAddr = a.Value[:]
+ }
+ case syscall.IFLA_IFNAME:
+ ifi.Name = string(a.Value[:])
+ case syscall.IFLA_MTU:
+ ifi.MTU = int(uint32(a.Value[3])<<24 | uint32(a.Value[2])<<16 | uint32(a.Value[1])<<8 | uint32(a.Value[0]))
+ }
+ }
+ return ifi
+}
+
+// If the ifindex is zero, interfaceAddrTable returns addresses
+// for all network interfaces. Otherwise it returns addresses
+// for a specific interface.
+func interfaceAddrTable(ifindex int) ([]Addr, os.Error) {
+ var (
+ ifat4 []Addr
+ ifat6 []Addr
+ tab []byte
+ msgs4 []syscall.NetlinkMessage
+ msgs6 []syscall.NetlinkMessage
+ e int
+ err os.Error
+ )
+
+ tab, e = syscall.NetlinkRIB(syscall.RTM_GETADDR, syscall.AF_INET)
+ if e != 0 {
+ return nil, os.NewSyscallError("netlink rib", e)
+ }
+ msgs4, e = syscall.ParseNetlinkMessage(tab)
+ if e != 0 {
+ return nil, os.NewSyscallError("netlink message", e)
+ }
+ ifat4, err = addrTable(msgs4, ifindex)
+ if err != nil {
+ return nil, err
+ }
+
+ tab, e = syscall.NetlinkRIB(syscall.RTM_GETADDR, syscall.AF_INET6)
+ if e != 0 {
+ return nil, os.NewSyscallError("netlink rib", e)
+ }
+ msgs6, e = syscall.ParseNetlinkMessage(tab)
+ if e != 0 {
+ return nil, os.NewSyscallError("netlink message", e)
+ }
+ ifat6, err = addrTable(msgs6, ifindex)
+ if err != nil {
+ return nil, err
+ }
+
+ return append(ifat4, ifat6...), nil
+}
+
+func addrTable(msgs []syscall.NetlinkMessage, ifindex int) ([]Addr, os.Error) {
+ var ifat []Addr
+
+ for _, m := range msgs {
+ switch m.Header.Type {
+ case syscall.NLMSG_DONE:
+ goto done
+ case syscall.RTM_NEWADDR:
+ ifam := (*syscall.IfAddrmsg)(unsafe.Pointer(&m.Data[0]))
+ if ifindex == 0 || ifindex == int(ifam.Index) {
+ attrs, e := syscall.ParseNetlinkRouteAttr(&m)
+ if e != 0 {
+ return nil, os.NewSyscallError("netlink routeattr", e)
+ }
+ ifat = append(ifat, newAddr(attrs, int(ifam.Family))...)
+ }
+ }
+ }
+
+done:
+ return ifat, nil
+}
+
+func newAddr(attrs []syscall.NetlinkRouteAttr, family int) []Addr {
+ var ifat []Addr
+
+ for _, a := range attrs {
+ switch a.Attr.Type {
+ case syscall.IFA_ADDRESS:
+ ifa := IPAddr{}
+ switch family {
+ case syscall.AF_INET:
+ ifa.IP = IPv4(a.Value[0], a.Value[1], a.Value[2], a.Value[3])
+ case syscall.AF_INET6:
+ ifa.IP = make(IP, IPv6len)
+ copy(ifa.IP, a.Value[:])
+ }
+ ifat = append(ifat, ifa.toAddr())
+ }
+ }
+
+ return ifat
+}
--- /dev/null
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Network interface identification
+
+package net
+
+import "os"
+
+// If the ifindex is zero, interfaceTable returns mappings of all
+// network interfaces. Otheriwse it returns a mapping of a specific
+// interface.
+func interfaceTable(ifindex int) ([]Interface, os.Error) {
+ return nil, nil
+}
+
+// If the ifindex is zero, interfaceAddrTable returns addresses
+// for all network interfaces. Otherwise it returns addresses
+// for a specific interface.
+func interfaceAddrTable(ifindex int) ([]Addr, os.Error) {
+ return nil, nil
+}
--- /dev/null
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package net
+
+import (
+ "bytes"
+ "testing"
+)
+
+func sameInterface(i, j *Interface) bool {
+ if i == nil || j == nil {
+ return false
+ }
+ if i.Index == j.Index && i.Name == j.Name && bytes.Equal(i.HardwareAddr, j.HardwareAddr) {
+ return true
+ }
+ return false
+}
+
+func interfaceFlagsString(ifi *Interface) string {
+ fs := "<"
+ if ifi.IsUp() {
+ fs += "UP,"
+ }
+ if ifi.CanBroadcast() {
+ fs += "BROADCAST,"
+ }
+ if ifi.IsLoopback() {
+ fs += "LOOPBACK,"
+ }
+ if ifi.IsPointToPoint() {
+ fs += "POINTOPOINT,"
+ }
+ if ifi.CanMulticast() {
+ fs += "MULTICAST,"
+ }
+ if len(fs) > 1 {
+ fs = fs[:len(fs)-1]
+ }
+ fs += ">"
+ return fs
+}
+
+func TestInterfaces(t *testing.T) {
+ ift, err := Interfaces()
+ if err != nil {
+ t.Fatalf("Interfaces() failed: %v", err)
+ }
+ t.Logf("table: len/cap = %v/%v\n", len(ift), cap(ift))
+
+ for _, ifi := range ift {
+ ifxi, err := InterfaceByIndex(ifi.Index)
+ if err != nil {
+ t.Fatalf("InterfaceByIndex(%#q) failed: %v", ifi.Index, err)
+ }
+ if !sameInterface(ifxi, &ifi) {
+ t.Fatalf("InterfaceByIndex(%#q) = %v, want %v", ifi.Index, *ifxi, ifi)
+ }
+ ifxn, err := InterfaceByName(ifi.Name)
+ if err != nil {
+ t.Fatalf("InterfaceByName(%#q) failed: %v", ifi.Name, err)
+ }
+ if !sameInterface(ifxn, &ifi) {
+ t.Fatalf("InterfaceByName(%#q) = %v, want %v", ifi.Name, *ifxn, ifi)
+ }
+ ifat, err := ifi.Addrs()
+ if err != nil {
+ t.Fatalf("Interface.Addrs() failed: %v", err)
+ }
+ t.Logf("%s: flags %s, ifindex %v, mtu %v\n", ifi.Name, interfaceFlagsString(&ifi), ifi.Index, ifi.MTU)
+ for _, ifa := range ifat {
+ t.Logf("\tinterface address %s\n", ifa.String())
+ }
+ t.Logf("\thardware address %v", ifi.HardwareAddr.String())
+ }
+}
+
+func TestInterfaceAddrs(t *testing.T) {
+ ifat, err := InterfaceAddrs()
+ if err != nil {
+ t.Fatalf("InterfaceAddrs() failed: %v", err)
+ }
+ t.Logf("table: len/cap = %v/%v\n", len(ifat), cap(ifat))
+
+ for _, ifa := range ifat {
+ t.Logf("interface address %s\n", ifa.String())
+ }
+}