| // 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 |
| } |
| |
| 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 |
| } |
