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