// Copyright 2016 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.
// +build darwin dragonfly freebsd netbsd openbsd
package route
import (
"fmt"
"os/exec"
"runtime"
"time"
)
func (m *RouteMessage) String() string {
return fmt.Sprintf("%s", addrAttrs(nativeEndian.Uint32(m.raw[12:16])))
}
func (m *InterfaceMessage) String() string {
var attrs addrAttrs
if runtime.GOOS == "openbsd" {
attrs = addrAttrs(nativeEndian.Uint32(m.raw[12:16]))
} else {
attrs = addrAttrs(nativeEndian.Uint32(m.raw[4:8]))
}
return fmt.Sprintf("%s", attrs)
}
func (m *InterfaceAddrMessage) String() string {
var attrs addrAttrs
if runtime.GOOS == "openbsd" {
attrs = addrAttrs(nativeEndian.Uint32(m.raw[12:16]))
} else {
attrs = addrAttrs(nativeEndian.Uint32(m.raw[4:8]))
}
return fmt.Sprintf("%s", attrs)
}
func (m *InterfaceMulticastAddrMessage) String() string {
return fmt.Sprintf("%s", addrAttrs(nativeEndian.Uint32(m.raw[4:8])))
}
func (m *InterfaceAnnounceMessage) String() string {
what := "<nil>"
switch m.What {
case 0:
what = "arrival"
case 1:
what = "departure"
}
return fmt.Sprintf("(%d %s %s)", m.Index, m.Name, what)
}
func (m *InterfaceMetrics) String() string {
return fmt.Sprintf("(type=%d mtu=%d)", m.Type, m.MTU)
}
func (m *RouteMetrics) String() string {
return fmt.Sprintf("(pmtu=%d)", m.PathMTU)
}
type addrAttrs uint
var addrAttrNames = [...]string{
"dst",
"gateway",
"netmask",
"genmask",
"ifp",
"ifa",
"author",
"brd",
"df:mpls1-n:tag-o:src", // mpls1 for dragonfly, tag for netbsd, src for openbsd
"df:mpls2-o:srcmask", // mpls2 for dragonfly, srcmask for openbsd
"df:mpls3-o:label", // mpls3 for dragonfly, label for openbsd
"o:bfd", // bfd for openbsd
"o:dns", // dns for openbsd
"o:static", // static for openbsd
"o:search", // search for openbsd
}
func (attrs addrAttrs) String() string {
var s string
for i, name := range addrAttrNames {
if attrs&(1<<uint(i)) != 0 {
if s != "" {
s += "|"
}
s += name
}
}
if s == "" {
return "<nil>"
}
return s
}
type msgs []Message
func (ms msgs) validate() ([]string, error) {
var ss []string
for _, m := range ms {
switch m := m.(type) {
case *RouteMessage:
if err := addrs(m.Addrs).match(addrAttrs(nativeEndian.Uint32(m.raw[12:16]))); err != nil {
return nil, err
}
sys := m.Sys()
if sys == nil {
return nil, fmt.Errorf("no sys for %s", m.String())
}
ss = append(ss, m.String()+" "+syss(sys).String()+" "+addrs(m.Addrs).String())
case *InterfaceMessage:
var attrs addrAttrs
if runtime.GOOS == "openbsd" {
attrs = addrAttrs(nativeEndian.Uint32(m.raw[12:16]))
} else {
attrs = addrAttrs(nativeEndian.Uint32(m.raw[4:8]))
}
if err := addrs(m.Addrs).match(attrs); err != nil {
return nil, err
}
sys := m.Sys()
if sys == nil {
return nil, fmt.Errorf("no sys for %s", m.String())
}
ss = append(ss, m.String()+" "+syss(sys).String()+" "+addrs(m.Addrs).String())
case *InterfaceAddrMessage:
var attrs addrAttrs
if runtime.GOOS == "openbsd" {
attrs = addrAttrs(nativeEndian.Uint32(m.raw[12:16]))
} else {
attrs = addrAttrs(nativeEndian.Uint32(m.raw[4:8]))
}
if err := addrs(m.Addrs).match(attrs); err != nil {
return nil, err
}
ss = append(ss, m.String()+" "+addrs(m.Addrs).String())
case *InterfaceMulticastAddrMessage:
if err := addrs(m.Addrs).match(addrAttrs(nativeEndian.Uint32(m.raw[4:8]))); err != nil {
return nil, err
}
ss = append(ss, m.String()+" "+addrs(m.Addrs).String())
case *InterfaceAnnounceMessage:
ss = append(ss, m.String())
default:
ss = append(ss, fmt.Sprintf("%+v", m))
}
}
return ss, nil
}
type syss []Sys
func (sys syss) String() string {
var s string
for _, sy := range sys {
switch sy := sy.(type) {
case *InterfaceMetrics:
if len(s) > 0 {
s += " "
}
s += sy.String()
case *RouteMetrics:
if len(s) > 0 {
s += " "
}
s += sy.String()
}
}
return s
}
type addrFamily int
func (af addrFamily) String() string {
switch af {
case sysAF_UNSPEC:
return "unspec"
case sysAF_LINK:
return "link"
case sysAF_INET:
return "inet4"
case sysAF_INET6:
return "inet6"
default:
return fmt.Sprintf("%d", af)
}
}
const hexDigit = "0123456789abcdef"
type llAddr []byte
func (a llAddr) String() string {
if len(a) == 0 {
return ""
}
buf := make([]byte, 0, len(a)*3-1)
for i, b := range a {
if i > 0 {
buf = append(buf, ':')
}
buf = append(buf, hexDigit[b>>4])
buf = append(buf, hexDigit[b&0xF])
}
return string(buf)
}
type ipAddr []byte
func (a ipAddr) String() string {
if len(a) == 0 {
return "<nil>"
}
if len(a) == 4 {
return fmt.Sprintf("%d.%d.%d.%d", a[0], a[1], a[2], a[3])
}
if len(a) == 16 {
return fmt.Sprintf("%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x", a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], a[10], a[11], a[12], a[13], a[14], a[15])
}
s := make([]byte, len(a)*2)
for i, tn := range a {
s[i*2], s[i*2+1] = hexDigit[tn>>4], hexDigit[tn&0xf]
}
return string(s)
}
func (a *LinkAddr) String() string {
name := a.Name
if name == "" {
name = "<nil>"
}
lla := llAddr(a.Addr).String()
if lla == "" {
lla = "<nil>"
}
return fmt.Sprintf("(%v %d %s %s)", addrFamily(a.Family()), a.Index, name, lla)
}
func (a *Inet4Addr) String() string {
return fmt.Sprintf("(%v %v)", addrFamily(a.Family()), ipAddr(a.IP[:]))
}
func (a *Inet6Addr) String() string {
return fmt.Sprintf("(%v %v %d)", addrFamily(a.Family()), ipAddr(a.IP[:]), a.ZoneID)
}
func (a *DefaultAddr) String() string {
return fmt.Sprintf("(%v %s)", addrFamily(a.Family()), ipAddr(a.Raw[2:]).String())
}
type addrs []Addr
func (as addrs) String() string {
var s string
for _, a := range as {
if a == nil {
continue
}
if len(s) > 0 {
s += " "
}
switch a := a.(type) {
case *LinkAddr:
s += a.String()
case *Inet4Addr:
s += a.String()
case *Inet6Addr:
s += a.String()
case *DefaultAddr:
s += a.String()
}
}
if s == "" {
return "<nil>"
}
return s
}
func (as addrs) match(attrs addrAttrs) error {
var ts addrAttrs
af := sysAF_UNSPEC
for i := range as {
if as[i] != nil {
ts |= 1 << uint(i)
}
switch as[i].(type) {
case *Inet4Addr:
if af == sysAF_UNSPEC {
af = sysAF_INET
}
if af != sysAF_INET {
return fmt.Errorf("got %v; want %v", addrs(as), addrFamily(af))
}
case *Inet6Addr:
if af == sysAF_UNSPEC {
af = sysAF_INET6
}
if af != sysAF_INET6 {
return fmt.Errorf("got %v; want %v", addrs(as), addrFamily(af))
}
}
}
if ts != attrs && ts > attrs {
return fmt.Errorf("%v not included in %v", ts, attrs)
}
return nil
}
func fetchAndParseRIB(af int, typ RIBType) ([]Message, error) {
var err error
var b []byte
for i := 0; i < 3; i++ {
if b, err = FetchRIB(af, typ, 0); err != nil {
time.Sleep(10 * time.Millisecond)
continue
}
break
}
if err != nil {
return nil, fmt.Errorf("%v %d %v", addrFamily(af), typ, err)
}
ms, err := ParseRIB(typ, b)
if err != nil {
return nil, fmt.Errorf("%v %d %v", addrFamily(af), typ, err)
}
return ms, nil
}
// propVirtual is a proprietary virtual network interface.
type propVirtual struct {
name string
addr, mask string
setupCmds []*exec.Cmd
teardownCmds []*exec.Cmd
}
func (pv *propVirtual) setup() error {
for _, cmd := range pv.setupCmds {
if err := cmd.Run(); err != nil {
pv.teardown()
return err
}
}
return nil
}
func (pv *propVirtual) teardown() error {
for _, cmd := range pv.teardownCmds {
if err := cmd.Run(); err != nil {
return err
}
}
return nil
}
func (pv *propVirtual) configure(suffix int) error {
if runtime.GOOS == "openbsd" {
pv.name = fmt.Sprintf("vether%d", suffix)
} else {
pv.name = fmt.Sprintf("vlan%d", suffix)
}
xname, err := exec.LookPath("ifconfig")
if err != nil {
return err
}
pv.setupCmds = append(pv.setupCmds, &exec.Cmd{
Path: xname,
Args: []string{"ifconfig", pv.name, "create"},
})
if runtime.GOOS == "netbsd" {
// NetBSD requires an underlying dot1Q-capable network
// interface.
pv.setupCmds = append(pv.setupCmds, &exec.Cmd{
Path: xname,
Args: []string{"ifconfig", pv.name, "vlan", fmt.Sprintf("%d", suffix&0xfff), "vlanif", "wm0"},
})
}
pv.setupCmds = append(pv.setupCmds, &exec.Cmd{
Path: xname,
Args: []string{"ifconfig", pv.name, "inet", pv.addr, "netmask", pv.mask},
})
pv.teardownCmds = append(pv.teardownCmds, &exec.Cmd{
Path: xname,
Args: []string{"ifconfig", pv.name, "destroy"},
})
return nil
}