Commit Graph

164 Commits (44ab0acbdbd8b79af74ea1f8187c4d782ce38635)

Author SHA1 Message Date
Brad Fitzpatrick 44ab0acbdb net/portmapper, wgengine/monitor: cache gateway IP info until link changes
Cuts down allocs & CPU in steady state (on regular STUN probes) when network
is unchanging.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 974be2ec5c net/interfaces: rewrite the darwin likelyHomeRouterIP from C to Go
We basically already had the RIB-parsing Go code for this in both
net/interfaces and wgengine/monitor, for other reasons.

Fixes #1426
Fixes #1471

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick c6358f2247 net/netcheck: add a few more STUN retries for prior DERP home
For #1310, maybe.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 0a84359d2d tailcfg, net/netcheck: let control mark "Avoid" bit on DERP regions
So a region can be used if needed, but won't be STUN-probed or used as
its home.

This gives us another possible debugging mechanism for #1310, or can
be used as a short-term measure against DERP flip-flops for people
equidistant between regions if our hysteresis still isn't good enough.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson d79a2f3809 wgengine/filter: only log packets to/from non-default routes.
Fixes tailscale/corp#1429.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick ef7bac2895 tailcfg, net/portmapper, wgengine/magicsock: add NetInfo.HavePortMap
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick fee74e7ea7 net/interfaces, wgengine/monitor: fix false positives link changes
interfaces.State.String tries to print a concise summary of the
network state, removing any interfaces that don't have any or any
interesting IP addresses. On macOS and iOS, for instance, there are a
ton of misc things.

But the link monitor based its are-there-changes decision on
interfaces.State.Equal, which just used reflect.DeepEqual, including
comparing all the boring interfaces. On macOS, when turning wifi on or off, there
are a ton of misc boring interface changes, resulting in hitting an earlier
check I'd added on suspicion this was happening:

    [unexpected] network state changed, but stringification didn't

This fixes that by instead adding a new
interfaces.State.RemoveUninterestingInterfacesAndAddresses method that
does, uh, that. Then use that in the monitor. So then when Equal is
used later, it's DeepEqualing the already-cleaned version with only
interesting interfaces.

This makes cmd/tailscaled debug --monitor much less noisy.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick b14ea68754 net/interfaces: log why when we failed to look up gateway on macOS
Not beautiful, but I'm debugging connectivity problems on
NEProvider.sleep+wake and need more clues.

Updates #1426
Updates tailscale/corp#1289

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick d37b3b02cd net/dnsfallback: fix infinite loop and limit number of candidates
Updates #1455 (fixes the DNS spin part, but other things aren't ideal there)

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 829eb8363a net/interfaces: sort returned addresses from LocalAddresses
Also change the type to netaddr.IP while here, because it made sorting
easier.

Updates tailscale/corp#1397

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 10f48087f4 net/tshttpproxy: call winhttp calls from a fixed OS thread
We often see things in logs like:

2021-03-02 17:52:45.2456258 +0800 +0800: winhttp: Open: The parameter is incorrect.
2021-03-02 17:52:45.2506261 +0800 +0800: tshttpproxy: winhttp: GetProxyForURL("https://log.tailscale.io/c/tailnode.log.tailscale.io/5037bb42f4bc330e2d6143e191a7ff7e837c6be538139231de69a439536e0d68"): ERROR_INVALID_PARAMETER [unexpected]

I have a hunch that WinHTTP has thread-local state. If so, this would fix it.
If not, this is pretty harmless.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 8a55d463c8 net/interfaces: merge darwin files for DefaultRouteInterface in sandbox
DefaultRouteInterface was previously guarded by build tags such that
it was only accessible to tailscaled-on-macos, but there was no reason
for that. It runs fine in the sandbox and gives better default info,
so merge its file into interfaces_darwin.go.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 8d77dfdacb wgengine/router: add a dummy IPv6 address if needed for default routing.
Fixes #1339

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick 63ed4dd6c9 net/portmapper: fix typo
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson f647e3daaf ipn/ipnlocal: transform default routes into "all but LAN" routes.
Fixes #1177.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick 9df4185c94 control/controlclient, net/{dnscache,dnsfallback}: add DNS fallback mechanism
Updates #1405
Updates #1403

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 38dc6fe758 cmd/tailscaled, wgengine: remove --fake, replace with netstack
And add a --socks5-server flag.

And fix a race in SOCKS5 replies where the response header was written
concurrently with the copy from the backend.

Co-authored with Naman Sood.

Updates #707
Updates #504

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Naman Sood fe16ef6812 net/socks5: create SOCKS5 package for proxy server in userspace networking
Updates #707
Updates #504

Signed-off-by: Naman Sood <mail@nsood.in>
4 years ago
Brad Fitzpatrick 000b80de9d net/interfaces: go idle on macOS when wifi/etc is down, ignore utun* interfaces
Updates tailscale/corp#1289
Updates tailscale/corp#1367
Updates tailscale/corp#1378
Updates tailscale/felicity#4
4 years ago
Brad Fitzpatrick c64bd587ae net/portmapper: add NAT-PMP client, move port mapping service probing
* move probing out of netcheck into new net/portmapper package
* use PCP ANNOUNCE op codes for PCP discovery, rather than causing
  short-lived (sub-second) side effects with a 1-second-expiring map +
  delete.
* track when we heard things from the router so we can be less wasteful
  in querying the router's port mapping services in the future
* use portmapper from magicsock to map a public port

Fixes #1298
Fixes #1080
Fixes #1001
Updates #864

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 6a2c6541da net/tshttpproxy: support HTTP proxy environment credentials on Windows too
and some minor style nits.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Christine Dodrill 3e5c3e932c
net/tshttpproxy: support basic auth when available (#1354)
This allows proxy URLs such as:

    http://azurediamond:hunter2@192.168.122.154:38274

to be used in order to dial out to control, logs or derp servers.

Signed-off-by: Christine Dodrill <xe@tailscale.com>
4 years ago
Brad Fitzpatrick f4ae745b0b net/{interfaces,netns}: add some new tests, missed from prior commit
I meant for these to be part of 52e24aa966.
4 years ago
Brad Fitzpatrick e923639feb net/interfaces: fix staticcheck error on darwin 4 years ago
Brad Fitzpatrick 52e24aa966 net/{interfaces,ns}: add tailscaled-mode darwin routing looping prevention
Fixes #1331

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 20e66c5b92 net/interfaces: reconcile interface filtering with address printing in logs
The interface.State logging tried to only log interfaces which had
interesting IPs, but the what-is-interesting checks differed between
the code that gathered the interface names to print and the printing
of their addresses.
4 years ago
Josh Bleecher Snyder 138055dd70 tstest/natlab: use net.ErrClosed instead of a new error
Upstream wireguard-go decided to use errors.Is(err, net.ErrClosed)
instead of checking the error string.

It also provided an unsafe linknamed version of net.ErrClosed
for clients running Go 1.15. Switch to that.

This reduces the time required for the wgengine/magicsock tests
on my machine from ~35s back to the ~13s it was before
456cf8a376.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
4 years ago
Brad Fitzpatrick d37058af72 net/packet: add some more TSMP packet reject reasons and MaybeBroken bit
Unused for now, but I want to backport this commit to 1.4 so 1.6 can
start sending these and then at least 1.4 logs will stringify nicely.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Crawshaw d139fa9c92 net/interfaces: use a uint32_t for ipv4 address
The code was using a C "int", which is a signed 32-bit integer.
That means some valid IP addresses were negative numbers.
(In particular, the default router address handed out by AT&T
fiber: 192.168.1.254. No I don't know why they do that.)
A negative number is < 255, and so was treated by the Go code
as an error.

This fixes the unit test failure:

	$ go test -v -run=TestLikelyHomeRouterIPSyscallExec ./net/interfaces
	=== RUN   TestLikelyHomeRouterIPSyscallExec
	    interfaces_darwin_cgo_test.go:15: syscall() = invalid IP, false, netstat = 192.168.1.254, true
	--- FAIL: TestLikelyHomeRouterIPSyscallExec (0.00s)

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
4 years ago
Brad Fitzpatrick 35e10c78fc net/interfaces: don't send over zt* interfaces
Fixes #1208

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 692a011b54 net/interfaces: remove IsTailscaleIP, make callers use tsaddr.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Josh Bleecher Snyder 7c1a9e8616 net/nettest: de-flake tests on Windows
Windows has a low resolution timer.
Some of the tests assumed that unblock takes effect immediately.

Consider:

t := time.Now()
elapsed := time.Now().After(t)

It seems plausible that elapsed should always be true.
However, with a low resolution timer, that might fail.

Change time.Now().After to !time.Now().Before,
so that unblocking always takes effect immediately.

Fixes #873.
4 years ago
Josh Bleecher Snyder a64d06f15c net/nettest: remove pointless checks in tests
If err == nil, then !errors.Is(err, anything).
4 years ago
Josh Bleecher Snyder 503db5540f net/nettest: add missing check at end of TestLimit
This appears to have been an oversight.
4 years ago
Brad Fitzpatrick b560386c1a net/packet, wgengine, tstun: add inter-node TSMP protocol for connect errors
This adds a new IP Protocol type, TSMP on protocol number 99 for
sending inter-tailscale messages over WireGuard, currently just for
why a peer rejects TCP SYNs (ACL rejection, shields up, and in the
future: nothing listening, something listening on that port but wrong
interface, etc)

Updates #1094
Updates tailscale/corp#1185

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Denton Gentry ac42757cd7 netcheck: use reflect in sortRegions test.
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
4 years ago
Denton Gentry 43e060b0e5 netcheck: test sortRegions
Signed-off-by: Denton Gentry <dgentry@tailscale.com>
4 years ago
Brad Fitzpatrick 5eeaea9ef9 net/packet: add TCPFlag type and some more constants
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick ad3fb6125d net/flowtrack: add Tuple.String method
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 676b5b7946 net/netcheck: improve the preferred DERP hysteresis
Users in Amsterdam (as one example) were flipping back and forth
between equidistant London & Frankfurt relays too much.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 4d15e954bd net/flowtrack: add new package to specialize groupcache/lru key type
Reduces allocs.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Brad Fitzpatrick 66be052a70 net/dnscache: work on IPv6-only hosts (again)
This fixes the regression where we had stopped working on IPv6-only
hosts.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
Josh Bleecher Snyder 1e88050403 net/tsaddr: add ChromeOS contains tests
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
4 years ago
David Anderson cb96b14bf4 net/packet: remove the custom IP4/IP6 types in favor of netaddr.IP.
Upstream netaddr has a change that makes it alloc-free, so it's safe to
use in hot codepaths. This gets rid of one of the many IP types in our
codebase.

Performance is currently worse across the board. This is likely due in
part to netaddr.IP being a larger value type (4b -> 24b for IPv4,
16b -> 24b for IPv6), and in other part due to missing low-hanging fruit
optimizations in netaddr. However, the regression is less bad than
it looks at first glance, because we'd micro-optimized packet.IP* in
the past few weeks. This change drops us back to roughly where we
were at the 1.2 release, but with the benefit of a significant
code and architectural simplification.

name                   old time/op    new time/op    delta
pkg:tailscale.com/net/packet goos:linux goarch:amd64
Decode/tcp4-8            12.2ns ± 5%    29.7ns ± 2%  +142.32%  (p=0.008 n=5+5)
Decode/tcp6-8            12.6ns ± 3%    65.1ns ± 2%  +418.47%  (p=0.008 n=5+5)
Decode/udp4-8            11.8ns ± 3%    30.5ns ± 2%  +157.94%  (p=0.008 n=5+5)
Decode/udp6-8            27.1ns ± 1%    65.7ns ± 2%  +142.36%  (p=0.016 n=4+5)
Decode/icmp4-8           24.6ns ± 2%    30.5ns ± 2%   +23.65%  (p=0.016 n=4+5)
Decode/icmp6-8           22.9ns ±51%    65.5ns ± 2%  +186.19%  (p=0.008 n=5+5)
Decode/igmp-8            18.1ns ±44%    30.2ns ± 1%   +66.89%  (p=0.008 n=5+5)
Decode/unknown-8         20.8ns ± 1%    10.6ns ± 9%   -49.11%  (p=0.016 n=4+5)
pkg:tailscale.com/wgengine/filter goos:linux goarch:amd64
Filter/icmp4-8           30.5ns ± 1%    77.9ns ± 3%  +155.01%  (p=0.008 n=5+5)
Filter/tcp4_syn_in-8     43.7ns ± 3%   123.0ns ± 3%  +181.72%  (p=0.008 n=5+5)
Filter/tcp4_syn_out-8    24.5ns ± 2%    45.7ns ± 6%   +86.22%  (p=0.008 n=5+5)
Filter/udp4_in-8         64.8ns ± 1%   210.0ns ± 2%  +223.87%  (p=0.008 n=5+5)
Filter/udp4_out-8         119ns ± 0%     278ns ± 0%  +133.78%  (p=0.016 n=4+5)
Filter/icmp6-8           40.3ns ± 2%   204.4ns ± 4%  +407.70%  (p=0.008 n=5+5)
Filter/tcp6_syn_in-8     35.3ns ± 3%   199.2ns ± 2%  +464.95%  (p=0.008 n=5+5)
Filter/tcp6_syn_out-8    32.8ns ± 2%    81.0ns ± 2%  +147.10%  (p=0.008 n=5+5)
Filter/udp6_in-8          106ns ± 2%     290ns ± 2%  +174.48%  (p=0.008 n=5+5)
Filter/udp6_out-8         184ns ± 2%     314ns ± 3%   +70.43%  (p=0.016 n=4+5)
pkg:tailscale.com/wgengine/tstun goos:linux goarch:amd64
Write-8                  9.02ns ± 3%    8.92ns ± 1%      ~     (p=0.421 n=5+5)

name                   old alloc/op   new alloc/op   delta
pkg:tailscale.com/net/packet goos:linux goarch:amd64
Decode/tcp4-8             0.00B          0.00B           ~     (all equal)
Decode/tcp6-8             0.00B          0.00B           ~     (all equal)
Decode/udp4-8             0.00B          0.00B           ~     (all equal)
Decode/udp6-8             0.00B          0.00B           ~     (all equal)
Decode/icmp4-8            0.00B          0.00B           ~     (all equal)
Decode/icmp6-8            0.00B          0.00B           ~     (all equal)
Decode/igmp-8             0.00B          0.00B           ~     (all equal)
Decode/unknown-8          0.00B          0.00B           ~     (all equal)
pkg:tailscale.com/wgengine/filter goos:linux goarch:amd64
Filter/icmp4-8            0.00B          0.00B           ~     (all equal)
Filter/tcp4_syn_in-8      0.00B          0.00B           ~     (all equal)
Filter/tcp4_syn_out-8     0.00B          0.00B           ~     (all equal)
Filter/udp4_in-8          0.00B          0.00B           ~     (all equal)
Filter/udp4_out-8         16.0B ± 0%     64.0B ± 0%  +300.00%  (p=0.008 n=5+5)
Filter/icmp6-8            0.00B          0.00B           ~     (all equal)
Filter/tcp6_syn_in-8      0.00B          0.00B           ~     (all equal)
Filter/tcp6_syn_out-8     0.00B          0.00B           ~     (all equal)
Filter/udp6_in-8          0.00B          0.00B           ~     (all equal)
Filter/udp6_out-8         48.0B ± 0%     64.0B ± 0%   +33.33%  (p=0.008 n=5+5)

name                   old allocs/op  new allocs/op  delta
pkg:tailscale.com/net/packet goos:linux goarch:amd64
Decode/tcp4-8              0.00           0.00           ~     (all equal)
Decode/tcp6-8              0.00           0.00           ~     (all equal)
Decode/udp4-8              0.00           0.00           ~     (all equal)
Decode/udp6-8              0.00           0.00           ~     (all equal)
Decode/icmp4-8             0.00           0.00           ~     (all equal)
Decode/icmp6-8             0.00           0.00           ~     (all equal)
Decode/igmp-8              0.00           0.00           ~     (all equal)
Decode/unknown-8           0.00           0.00           ~     (all equal)
pkg:tailscale.com/wgengine/filter goos:linux goarch:amd64
Filter/icmp4-8             0.00           0.00           ~     (all equal)
Filter/tcp4_syn_in-8       0.00           0.00           ~     (all equal)
Filter/tcp4_syn_out-8      0.00           0.00           ~     (all equal)
Filter/udp4_in-8           0.00           0.00           ~     (all equal)
Filter/udp4_out-8          1.00 ± 0%      1.00 ± 0%      ~     (all equal)
Filter/icmp6-8             0.00           0.00           ~     (all equal)
Filter/tcp6_syn_in-8       0.00           0.00           ~     (all equal)
Filter/tcp6_syn_out-8      0.00           0.00           ~     (all equal)
Filter/udp6_in-8           0.00           0.00           ~     (all equal)
Filter/udp6_out-8          1.00 ± 0%      1.00 ± 0%      ~     (all equal)

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick d0baece5fa go.mod: bump inet.af/netaddr to non-allocating version 4 years ago
Brad Fitzpatrick 053a1d1340 all: annotate log verbosity levels on most egregiously spammy log prints
Fixes #924
Fixes #282

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson baa7937998 net/interfaces: return IPv6 addresses from LocalAddresses.
In practice, we already provide IPv6 endpoint addresses via netcheck,
and that address is likely to match a local address anyway (i.e. no NAT66).
The comment at that piece of the code mentions needing to figure out a
good priority ordering, but that only applies to non-active-discovery
clients, who already don't do anything with IPv6 addresses.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson aa353b8d0f net/packet: add an IP6 constructor from a raw byte array.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Josh Bleecher Snyder a6cad71fb2 go.mod: upgrade staticcheck to 0.1.0
Also run go.mod and fix some staticcheck warnings.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
4 years ago
Brad Fitzpatrick 08f94b3b50 net/netcheck: fix offset of unspecified address in PCP request packet
Fixes #810
4 years ago