mirror of https://github.com/tidwall/tile38.git
106 lines
2.4 KiB
Go
106 lines
2.4 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 (
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"errors"
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"unsafe"
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)
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// An Addr represents an address associated with packet routing.
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type Addr interface {
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// Family returns an address family.
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Family() int
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}
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// An Inet4Addr represents an internet address for IPv4.
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type Inet4Addr struct {
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IP [4]byte // IP address
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PrefixLen int // address prefix length
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}
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// Family implements the Family method of Addr interface.
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func (a *Inet4Addr) Family() int { return sysAF_INET }
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// An Inet6Addr represents an internet address for IPv6.
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type Inet6Addr struct {
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IP [16]byte // IP address
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PrefixLen int // address prefix length
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ZoneID int // zone identifier
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}
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// Family implements the Family method of Addr interface.
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func (a *Inet6Addr) Family() int { return sysAF_INET6 }
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// Addrs returns a list of interface addresses.
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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 Addrs(af int, name string) ([]Addr, 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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lls, err := links(eps, name)
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if len(lls) == 0 {
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return nil, err
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}
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var as []Addr
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for _, ll := range lls {
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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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for _, ep := range eps {
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ioc := int64(sysSIOCGLIFADDR)
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err := ioctl(ep.s, uintptr(ioc), unsafe.Pointer(&lifr))
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if err != nil {
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continue
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}
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sa := (*sockaddrStorage)(unsafe.Pointer(&lifr.Lifru[0]))
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l := int(nativeEndian.Uint32(lifr.Lifru1[:4]))
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if l == 0 {
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continue
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}
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switch sa.Family {
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case sysAF_INET:
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a := &Inet4Addr{PrefixLen: l}
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copy(a.IP[:], lifr.Lifru[4:8])
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as = append(as, a)
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case sysAF_INET6:
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a := &Inet6Addr{PrefixLen: l, ZoneID: int(nativeEndian.Uint32(lifr.Lifru[24:28]))}
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copy(a.IP[:], lifr.Lifru[8:24])
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as = append(as, a)
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}
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}
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}
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return as, nil
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}
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func parseLinkAddr(b []byte) ([]byte, error) {
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nlen, alen, slen := int(b[1]), int(b[2]), int(b[3])
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l := 4 + nlen + alen + slen
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if len(b) < l {
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return nil, errors.New("invalid address")
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}
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b = b[4:]
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var addr []byte
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if nlen > 0 {
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b = b[nlen:]
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}
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if alen > 0 {
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addr = make([]byte, alen)
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copy(addr, b[:alen])
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}
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return addr, nil
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}
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