1 files changed, 186 insertions, 0 deletions
diff --git a/src/net/interface_aix.go b/src/net/interface_aix.go
new file mode 100644
index 0000000..7ad45d1
--- /dev/null
+++ b/src/net/interface_aix.go
@@ -0,0 +1,186 @@
+// Copyright 2018 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 (
+	"internal/poll"
+	"internal/syscall/unix"
+	"syscall"
+	"unsafe"
+)
+
+type rawSockaddrDatalink struct {
+	Len    uint8
+	Family uint8
+	Index  uint16
+	Type   uint8
+	Nlen   uint8
+	Alen   uint8
+	Slen   uint8
+	Data   [120]byte
+}
+
+type ifreq struct {
+	Name [16]uint8
+	Ifru [16]byte
+}
+
+const _KINFO_RT_IFLIST = (0x1 << 8) | 3 | (1 << 30)
+
+const _RTAX_NETMASK = 2
+const _RTAX_IFA = 5
+const _RTAX_MAX = 8
+
+func getIfList() ([]byte, error) {
+	needed, err := syscall.Getkerninfo(_KINFO_RT_IFLIST, 0, 0, 0)
+	if err != nil {
+		return nil, err
+	}
+	tab := make([]byte, needed)
+	_, err = syscall.Getkerninfo(_KINFO_RT_IFLIST, uintptr(unsafe.Pointer(&tab[0])), uintptr(unsafe.Pointer(&needed)), 0)
+	if err != nil {
+		return nil, err
+	}
+	return tab[:needed], nil
+}
+
+// If the ifindex is zero, interfaceTable returns mappings of all
+// network interfaces. Otherwise it returns a mapping of a specific
+// interface.
+func interfaceTable(ifindex int) ([]Interface, error) {
+	tab, err := getIfList()
+	if err != nil {
+		return nil, err
+	}
+
+	sock, err := sysSocket(syscall.AF_INET, syscall.SOCK_DGRAM, 0)
+	if err != nil {
+		return nil, err
+	}
+	defer poll.CloseFunc(sock)
+
+	var ift []Interface
+	for len(tab) > 0 {
+		ifm := (*syscall.IfMsgHdr)(unsafe.Pointer(&tab[0]))
+		if ifm.Msglen == 0 {
+			break
+		}
+		if ifm.Type == syscall.RTM_IFINFO {
+			if ifindex == 0 || ifindex == int(ifm.Index) {
+				sdl := (*rawSockaddrDatalink)(unsafe.Pointer(&tab[syscall.SizeofIfMsghdr]))
+
+				ifi := &Interface{Index: int(ifm.Index), Flags: linkFlags(ifm.Flags)}
+				ifi.Name = string(sdl.Data[:sdl.Nlen])
+				ifi.HardwareAddr = sdl.Data[sdl.Nlen : sdl.Nlen+sdl.Alen]
+
+				// Retrieve MTU
+				ifr := &ifreq{}
+				copy(ifr.Name[:], ifi.Name)
+				err = unix.Ioctl(sock, syscall.SIOCGIFMTU, unsafe.Pointer(ifr))
+				if err != nil {
+					return nil, err
+				}
+				ifi.MTU = int(ifr.Ifru[0])<<24 | int(ifr.Ifru[1])<<16 | int(ifr.Ifru[2])<<8 | int(ifr.Ifru[3])
+
+				ift = append(ift, *ifi)
+				if ifindex == int(ifm.Index) {
+					break
+				}
+			}
+		}
+		tab = tab[ifm.Msglen:]
+	}
+
+	return ift, nil
+}
+
+func linkFlags(rawFlags int32) Flags {
+	var f Flags
+	if rawFlags&syscall.IFF_UP != 0 {
+		f |= FlagUp
+	}
+	if rawFlags&syscall.IFF_BROADCAST != 0 {
+		f |= FlagBroadcast
+	}
+	if rawFlags&syscall.IFF_LOOPBACK != 0 {
+		f |= FlagLoopback
+	}
+	if rawFlags&syscall.IFF_POINTOPOINT != 0 {
+		f |= FlagPointToPoint
+	}
+	if rawFlags&syscall.IFF_MULTICAST != 0 {
+		f |= FlagMulticast
+	}
+	return f
+}
+
+// If the ifi is nil, interfaceAddrTable returns addresses for all
+// network interfaces. Otherwise it returns addresses for a specific
+// interface.
+func interfaceAddrTable(ifi *Interface) ([]Addr, error) {
+	tab, err := getIfList()
+	if err != nil {
+		return nil, err
+	}
+
+	var ifat []Addr
+	for len(tab) > 0 {
+		ifm := (*syscall.IfMsgHdr)(unsafe.Pointer(&tab[0]))
+		if ifm.Msglen == 0 {
+			break
+		}
+		if ifm.Type == syscall.RTM_NEWADDR {
+			if ifi == nil || ifi.Index == int(ifm.Index) {
+				mask := ifm.Addrs
+				off := uint(syscall.SizeofIfMsghdr)
+
+				var iprsa, nmrsa *syscall.RawSockaddr
+				for i := uint(0); i < _RTAX_MAX; i++ {
+					if mask&(1<<i) == 0 {
+						continue
+					}
+					rsa := (*syscall.RawSockaddr)(unsafe.Pointer(&tab[off]))
+					if i == _RTAX_NETMASK {
+						nmrsa = rsa
+					}
+					if i == _RTAX_IFA {
+						iprsa = rsa
+					}
+					off += (uint(rsa.Len) + 3) &^ 3
+				}
+				if iprsa != nil && nmrsa != nil {
+					var mask IPMask
+					var ip IP
+
+					switch iprsa.Family {
+					case syscall.AF_INET:
+						ipsa := (*syscall.RawSockaddrInet4)(unsafe.Pointer(iprsa))
+						nmsa := (*syscall.RawSockaddrInet4)(unsafe.Pointer(nmrsa))
+						ip = IPv4(ipsa.Addr[0], ipsa.Addr[1], ipsa.Addr[2], ipsa.Addr[3])
+						mask = IPv4Mask(nmsa.Addr[0], nmsa.Addr[1], nmsa.Addr[2], nmsa.Addr[3])
+					case syscall.AF_INET6:
+						ipsa := (*syscall.RawSockaddrInet6)(unsafe.Pointer(iprsa))
+						nmsa := (*syscall.RawSockaddrInet6)(unsafe.Pointer(nmrsa))
+						ip = make(IP, IPv6len)
+						copy(ip, ipsa.Addr[:])
+						mask = make(IPMask, IPv6len)
+						copy(mask, nmsa.Addr[:])
+					}
+					ifa := &IPNet{IP: ip, Mask: mask}
+					ifat = append(ifat, ifa)
+				}
+			}
+		}
+		tab = tab[ifm.Msglen:]
+	}
+
+	return ifat, nil
+}
+
+// interfaceMulticastAddrTable returns addresses for a specific
+// interface.
+func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
+	return nil, nil
+}