127 lines
3.6 KiB
Go
127 lines
3.6 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build solaris
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package lif
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import "unsafe"
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// A Link represents logical data link information.
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//
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// It also represents base information for logical network interface.
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// On Solaris, each logical network interface represents network layer
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// adjacency information and the interface has a only single network
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// address or address pair for tunneling. It's usual that multiple
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// logical network interfaces share the same logical data link.
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type Link struct {
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Name string // name, equivalent to IP interface name
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Index int // index, equivalent to IP interface index
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Type int // type
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Flags int // flags
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MTU int // maximum transmission unit, basically link MTU but may differ between IP address families
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Addr []byte // address
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}
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func (ll *Link) fetch(s uintptr) {
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var lifr lifreq
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for i := 0; i < len(ll.Name); i++ {
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lifr.Name[i] = int8(ll.Name[i])
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}
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ioc := int64(sysSIOCGLIFINDEX)
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if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
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ll.Index = int(nativeEndian.Uint32(lifr.Lifru[:4]))
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}
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ioc = int64(sysSIOCGLIFFLAGS)
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if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
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ll.Flags = int(nativeEndian.Uint64(lifr.Lifru[:8]))
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}
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ioc = int64(sysSIOCGLIFMTU)
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if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
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ll.MTU = int(nativeEndian.Uint32(lifr.Lifru[:4]))
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}
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switch ll.Type {
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case sysIFT_IPV4, sysIFT_IPV6, sysIFT_6TO4:
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default:
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ioc = int64(sysSIOCGLIFHWADDR)
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if err := ioctl(s, uintptr(ioc), unsafe.Pointer(&lifr)); err == nil {
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ll.Addr, _ = parseLinkAddr(lifr.Lifru[4:])
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}
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}
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}
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// Links returns a list of logical data links.
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//
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// The provided af must be an address family and name must be a data
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// link name. The zero value of af or name means a wildcard.
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func Links(af int, name string) ([]Link, error) {
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eps, err := newEndpoints(af)
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if len(eps) == 0 {
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return nil, err
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}
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defer func() {
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for _, ep := range eps {
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ep.close()
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}
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}()
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return links(eps, name)
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}
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func links(eps []endpoint, name string) ([]Link, error) {
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var lls []Link
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lifn := lifnum{Flags: sysLIFC_NOXMIT | sysLIFC_TEMPORARY | sysLIFC_ALLZONES | sysLIFC_UNDER_IPMP}
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lifc := lifconf{Flags: sysLIFC_NOXMIT | sysLIFC_TEMPORARY | sysLIFC_ALLZONES | sysLIFC_UNDER_IPMP}
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for _, ep := range eps {
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lifn.Family = uint16(ep.af)
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ioc := int64(sysSIOCGLIFNUM)
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if err := ioctl(ep.s, uintptr(ioc), unsafe.Pointer(&lifn)); err != nil {
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continue
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}
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if lifn.Count == 0 {
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continue
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}
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b := make([]byte, lifn.Count*sizeofLifreq)
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lifc.Family = uint16(ep.af)
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lifc.Len = lifn.Count * sizeofLifreq
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if len(lifc.Lifcu) == 8 {
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nativeEndian.PutUint64(lifc.Lifcu[:], uint64(uintptr(unsafe.Pointer(&b[0]))))
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} else {
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nativeEndian.PutUint32(lifc.Lifcu[:], uint32(uintptr(unsafe.Pointer(&b[0]))))
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}
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ioc = int64(sysSIOCGLIFCONF)
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if err := ioctl(ep.s, uintptr(ioc), unsafe.Pointer(&lifc)); err != nil {
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continue
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}
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nb := make([]byte, 32) // see LIFNAMSIZ in net/if.h
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for i := 0; i < int(lifn.Count); i++ {
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lifr := (*lifreq)(unsafe.Pointer(&b[i*sizeofLifreq]))
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for i := 0; i < 32; i++ {
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if lifr.Name[i] == 0 {
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nb = nb[:i]
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break
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}
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nb[i] = byte(lifr.Name[i])
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}
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llname := string(nb)
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nb = nb[:32]
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if isDupLink(lls, llname) || name != "" && name != llname {
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continue
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}
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ll := Link{Name: llname, Type: int(lifr.Type)}
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ll.fetch(ep.s)
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lls = append(lls, ll)
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}
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}
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return lls, nil
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}
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func isDupLink(lls []Link, name string) bool {
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for _, ll := range lls {
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if ll.Name == name {
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return true
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}
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}
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return false
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}
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