mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-05 16:05:36 +00:00
a12aad6b47
perl -i -npe 's,netaddr.IPPrefixFrom,netip.PrefixFrom,' $(git grep -l -F netaddr.) perl -i -npe 's,netaddr.IPPortFrom,netip.AddrPortFrom,' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPrefix,netip.Prefix,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPort,netip.AddrPort,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IP\b,netip.Addr,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPv6Raw\b,netip.AddrFrom16,g' $(git grep -l -F netaddr. ) goimports -w . Then delete some stuff from the net/netaddr shim package which is no longer neeed. Updates #5162 Change-Id: Ia7a86893fe21c7e3ee1ec823e8aba288d4566cd8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
319 lines
8.4 KiB
Go
319 lines
8.4 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
//go:build go1.18
|
|
// +build go1.18
|
|
|
|
package main
|
|
|
|
import (
|
|
"context"
|
|
"crypto/tls"
|
|
"encoding/json"
|
|
"errors"
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"log"
|
|
"net"
|
|
"net/http"
|
|
"net/http/httptrace"
|
|
"net/netip"
|
|
"net/url"
|
|
"os"
|
|
"strings"
|
|
"time"
|
|
|
|
"tailscale.com/derp/derphttp"
|
|
"tailscale.com/envknob"
|
|
"tailscale.com/ipn"
|
|
"tailscale.com/net/interfaces"
|
|
"tailscale.com/net/portmapper"
|
|
"tailscale.com/net/tshttpproxy"
|
|
"tailscale.com/tailcfg"
|
|
"tailscale.com/types/key"
|
|
"tailscale.com/types/logger"
|
|
"tailscale.com/wgengine/monitor"
|
|
)
|
|
|
|
var debugArgs struct {
|
|
ifconfig bool // print network state once and exit
|
|
monitor bool
|
|
getURL string
|
|
derpCheck string
|
|
portmap bool
|
|
}
|
|
|
|
var debugModeFunc = debugMode // so it can be addressable
|
|
|
|
func debugMode(args []string) error {
|
|
fs := flag.NewFlagSet("debug", flag.ExitOnError)
|
|
fs.BoolVar(&debugArgs.ifconfig, "ifconfig", false, "If true, print network interface state")
|
|
fs.BoolVar(&debugArgs.monitor, "monitor", false, "If true, run link monitor forever. Precludes all other options.")
|
|
fs.BoolVar(&debugArgs.portmap, "portmap", false, "If true, run portmap debugging. Precludes all other options.")
|
|
fs.StringVar(&debugArgs.getURL, "get-url", "", "If non-empty, fetch provided URL.")
|
|
fs.StringVar(&debugArgs.derpCheck, "derp", "", "if non-empty, test a DERP ping via named region code")
|
|
if err := fs.Parse(args); err != nil {
|
|
return err
|
|
}
|
|
if len(fs.Args()) > 0 {
|
|
return errors.New("unknown non-flag debug subcommand arguments")
|
|
}
|
|
ctx := context.Background()
|
|
if debugArgs.derpCheck != "" {
|
|
return checkDerp(ctx, debugArgs.derpCheck)
|
|
}
|
|
if debugArgs.ifconfig {
|
|
return runMonitor(ctx, false)
|
|
}
|
|
if debugArgs.monitor {
|
|
return runMonitor(ctx, true)
|
|
}
|
|
if debugArgs.portmap {
|
|
return debugPortmap(ctx)
|
|
}
|
|
if debugArgs.getURL != "" {
|
|
return getURL(ctx, debugArgs.getURL)
|
|
}
|
|
return errors.New("only --monitor is available at the moment")
|
|
}
|
|
|
|
func runMonitor(ctx context.Context, loop bool) error {
|
|
dump := func(st *interfaces.State) {
|
|
j, _ := json.MarshalIndent(st, "", " ")
|
|
os.Stderr.Write(j)
|
|
}
|
|
mon, err := monitor.New(log.Printf)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
mon.RegisterChangeCallback(func(changed bool, st *interfaces.State) {
|
|
if !changed {
|
|
log.Printf("Link monitor fired; no change")
|
|
return
|
|
}
|
|
log.Printf("Link monitor fired. New state:")
|
|
dump(st)
|
|
})
|
|
if loop {
|
|
log.Printf("Starting link change monitor; initial state:")
|
|
}
|
|
dump(mon.InterfaceState())
|
|
if !loop {
|
|
return nil
|
|
}
|
|
mon.Start()
|
|
log.Printf("Started link change monitor; waiting...")
|
|
select {}
|
|
}
|
|
|
|
func getURL(ctx context.Context, urlStr string) error {
|
|
if urlStr == "login" {
|
|
urlStr = "https://login.tailscale.com"
|
|
}
|
|
log.SetOutput(os.Stdout)
|
|
ctx = httptrace.WithClientTrace(ctx, &httptrace.ClientTrace{
|
|
GetConn: func(hostPort string) { log.Printf("GetConn(%q)", hostPort) },
|
|
GotConn: func(info httptrace.GotConnInfo) { log.Printf("GotConn: %+v", info) },
|
|
DNSStart: func(info httptrace.DNSStartInfo) { log.Printf("DNSStart: %+v", info) },
|
|
DNSDone: func(info httptrace.DNSDoneInfo) { log.Printf("DNSDoneInfo: %+v", info) },
|
|
TLSHandshakeStart: func() { log.Printf("TLSHandshakeStart") },
|
|
TLSHandshakeDone: func(cs tls.ConnectionState, err error) { log.Printf("TLSHandshakeDone: %+v, %v", cs, err) },
|
|
WroteRequest: func(info httptrace.WroteRequestInfo) { log.Printf("WroteRequest: %+v", info) },
|
|
})
|
|
req, err := http.NewRequestWithContext(ctx, "GET", urlStr, nil)
|
|
if err != nil {
|
|
return fmt.Errorf("http.NewRequestWithContext: %v", err)
|
|
}
|
|
proxyURL, err := tshttpproxy.ProxyFromEnvironment(req)
|
|
if err != nil {
|
|
return fmt.Errorf("tshttpproxy.ProxyFromEnvironment: %v", err)
|
|
}
|
|
log.Printf("proxy: %v", proxyURL)
|
|
tr := &http.Transport{
|
|
Proxy: func(*http.Request) (*url.URL, error) { return proxyURL, nil },
|
|
ProxyConnectHeader: http.Header{},
|
|
DisableKeepAlives: true,
|
|
}
|
|
if proxyURL != nil {
|
|
auth, err := tshttpproxy.GetAuthHeader(proxyURL)
|
|
if err == nil && auth != "" {
|
|
tr.ProxyConnectHeader.Set("Proxy-Authorization", auth)
|
|
}
|
|
log.Printf("tshttpproxy.GetAuthHeader(%v) got: auth of %d bytes, err=%v", proxyURL, len(auth), err)
|
|
const truncLen = 20
|
|
if len(auth) > truncLen {
|
|
auth = fmt.Sprintf("%s...(%d total bytes)", auth[:truncLen], len(auth))
|
|
}
|
|
if auth != "" {
|
|
// We used log.Printf above (for timestamps).
|
|
// Use fmt.Printf here instead just to appease
|
|
// a security scanner, despite log.Printf only
|
|
// going to stdout.
|
|
fmt.Printf("... Proxy-Authorization = %q\n", auth)
|
|
}
|
|
}
|
|
res, err := tr.RoundTrip(req)
|
|
if err != nil {
|
|
return fmt.Errorf("Transport.RoundTrip: %v", err)
|
|
}
|
|
defer res.Body.Close()
|
|
return res.Write(os.Stdout)
|
|
}
|
|
|
|
func checkDerp(ctx context.Context, derpRegion string) error {
|
|
req, err := http.NewRequestWithContext(ctx, "GET", ipn.DefaultControlURL+"/derpmap/default", nil)
|
|
if err != nil {
|
|
return fmt.Errorf("create derp map request: %w", err)
|
|
}
|
|
res, err := http.DefaultClient.Do(req)
|
|
if err != nil {
|
|
return fmt.Errorf("fetch derp map failed: %w", err)
|
|
}
|
|
defer res.Body.Close()
|
|
b, err := ioutil.ReadAll(io.LimitReader(res.Body, 1<<20))
|
|
if err != nil {
|
|
return fmt.Errorf("fetch derp map failed: %w", err)
|
|
}
|
|
if res.StatusCode != 200 {
|
|
return fmt.Errorf("fetch derp map: %v: %s", res.Status, b)
|
|
}
|
|
var dmap tailcfg.DERPMap
|
|
if err = json.Unmarshal(b, &dmap); err != nil {
|
|
return fmt.Errorf("fetch DERP map: %w", err)
|
|
}
|
|
getRegion := func() *tailcfg.DERPRegion {
|
|
for _, r := range dmap.Regions {
|
|
if r.RegionCode == derpRegion {
|
|
return r
|
|
}
|
|
}
|
|
for _, r := range dmap.Regions {
|
|
log.Printf("Known region: %q", r.RegionCode)
|
|
}
|
|
log.Fatalf("unknown region %q", derpRegion)
|
|
panic("unreachable")
|
|
}
|
|
|
|
priv1 := key.NewNode()
|
|
priv2 := key.NewNode()
|
|
|
|
c1 := derphttp.NewRegionClient(priv1, log.Printf, getRegion)
|
|
c2 := derphttp.NewRegionClient(priv2, log.Printf, getRegion)
|
|
|
|
c2.NotePreferred(true) // just to open it
|
|
|
|
m, err := c2.Recv()
|
|
log.Printf("c2 got %T, %v", m, err)
|
|
|
|
t0 := time.Now()
|
|
if err := c1.Send(priv2.Public(), []byte("hello")); err != nil {
|
|
return err
|
|
}
|
|
fmt.Println(time.Since(t0))
|
|
|
|
m, err = c2.Recv()
|
|
log.Printf("c2 got %T, %v", m, err)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
log.Printf("ok")
|
|
return err
|
|
}
|
|
|
|
func debugPortmap(ctx context.Context) error {
|
|
ctx, cancel := context.WithTimeout(ctx, 3*time.Second)
|
|
defer cancel()
|
|
|
|
portmapper.VerboseLogs = true
|
|
switch envknob.String("TS_DEBUG_PORTMAP_TYPE") {
|
|
case "":
|
|
case "pmp":
|
|
portmapper.DisablePCP = true
|
|
portmapper.DisableUPnP = true
|
|
case "pcp":
|
|
portmapper.DisablePMP = true
|
|
portmapper.DisableUPnP = true
|
|
case "upnp":
|
|
portmapper.DisablePCP = true
|
|
portmapper.DisablePMP = true
|
|
default:
|
|
log.Fatalf("TS_DEBUG_PORTMAP_TYPE must be one of pmp,pcp,upnp")
|
|
}
|
|
|
|
done := make(chan bool, 1)
|
|
|
|
var c *portmapper.Client
|
|
logf := log.Printf
|
|
c = portmapper.NewClient(logger.WithPrefix(logf, "portmapper: "), func() {
|
|
logf("portmapping changed.")
|
|
logf("have mapping: %v", c.HaveMapping())
|
|
|
|
if ext, ok := c.GetCachedMappingOrStartCreatingOne(); ok {
|
|
logf("cb: mapping: %v", ext)
|
|
select {
|
|
case done <- true:
|
|
default:
|
|
}
|
|
return
|
|
}
|
|
logf("cb: no mapping")
|
|
})
|
|
linkMon, err := monitor.New(logger.WithPrefix(logf, "monitor: "))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
gatewayAndSelfIP := func() (gw, self netip.Addr, ok bool) {
|
|
if v := os.Getenv("TS_DEBUG_GW_SELF"); strings.Contains(v, "/") {
|
|
i := strings.Index(v, "/")
|
|
gw = netip.MustParseAddr(v[:i])
|
|
self = netip.MustParseAddr(v[i+1:])
|
|
return gw, self, true
|
|
}
|
|
return linkMon.GatewayAndSelfIP()
|
|
}
|
|
|
|
c.SetGatewayLookupFunc(gatewayAndSelfIP)
|
|
|
|
gw, selfIP, ok := gatewayAndSelfIP()
|
|
if !ok {
|
|
logf("no gateway or self IP; %v", linkMon.InterfaceState())
|
|
return nil
|
|
}
|
|
logf("gw=%v; self=%v", gw, selfIP)
|
|
|
|
uc, err := net.ListenPacket("udp", "0.0.0.0:0")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer uc.Close()
|
|
c.SetLocalPort(uint16(uc.LocalAddr().(*net.UDPAddr).Port))
|
|
|
|
res, err := c.Probe(ctx)
|
|
if err != nil {
|
|
return fmt.Errorf("Probe: %v", err)
|
|
}
|
|
logf("Probe: %+v", res)
|
|
|
|
if !res.PCP && !res.PMP && !res.UPnP {
|
|
logf("no portmapping services available")
|
|
return nil
|
|
}
|
|
|
|
if ext, ok := c.GetCachedMappingOrStartCreatingOne(); ok {
|
|
logf("mapping: %v", ext)
|
|
} else {
|
|
logf("no mapping")
|
|
}
|
|
|
|
select {
|
|
case <-done:
|
|
return nil
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
}
|
|
}
|