d37058af72
net/packet: add some more TSMP packet reject reasons and MaybeBroken bit
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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>
5 years ago
b560386c1a
net/packet, wgengine, tstun: add inter-node TSMP protocol for connect errors
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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>
5 years ago
5eeaea9ef9
net/packet: add TCPFlag type and some more constants
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Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
5 years ago
cb96b14bf4
net/packet: remove the custom IP4/IP6 types in favor of netaddr.IP.
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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>
5 years ago
d0baece5fa
go.mod: bump inet.af/netaddr to non-allocating version
5 years ago
aa353b8d0f
net/packet: add an IP6 constructor from a raw byte array.
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Signed-off-by: David Anderson <danderson@tailscale.com>
5 years ago
3c508a58cc
wgengine/filter: don't filter GCP DNS.
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Signed-off-by: David Anderson <danderson@tailscale.com>
5 years ago
b0526e8284
net/packet: remove unnecessary mark
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There's no need to mask out the bottom four bits
of b[0] if we are about to shift them away.
6 years ago
efad55cf86
net/packet: speed up packet decoding
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The compiler is failing to draw the connection between
slice cap and slice len, so is missing some obvious BCE opportunities.
Give it a hint by making the cap equal to the length.
The generated code is smaller and cleaner, and a bit faster.
name old time/op new time/op delta
Decode/tcp4-8 12.2ns ± 1% 11.6ns ± 3% -5.31% (p=0.000 n=28+29)
Decode/tcp6-8 12.5ns ± 2% 11.9ns ± 2% -4.84% (p=0.000 n=30+30)
Decode/udp4-8 11.5ns ± 1% 11.1ns ± 1% -3.11% (p=0.000 n=25+24)
Decode/udp6-8 11.8ns ± 3% 11.4ns ± 1% -3.08% (p=0.000 n=30+26)
Decode/icmp4-8 11.0ns ± 3% 10.6ns ± 1% -3.38% (p=0.000 n=25+30)
Decode/icmp6-8 11.4ns ± 1% 11.1ns ± 2% -2.29% (p=0.000 n=27+30)
Decode/igmp-8 10.3ns ± 0% 10.0ns ± 1% -3.26% (p=0.000 n=19+23)
Decode/unknown-8 8.68ns ± 1% 8.38ns ± 1% -3.55% (p=0.000 n=28+29)
6 years ago
2d604b3791
net/packet: represent IP6 as two uint64s.
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For the operations we perform on these types (mostly net6.Contains),
this encoding is much faster.
Part of #19 .
name old time/op new time/op delta
Filter/icmp4-8 27.5ns ± 1% 28.0ns ± 2% +1.89% (p=0.016 n=5+5)
Filter/tcp4_syn_in-8 38.8ns ± 2% 38.3ns ± 1% -1.24% (p=0.024 n=5+5)
Filter/tcp4_syn_out-8 27.6ns ±12% 24.6ns ± 1% ~ (p=0.063 n=5+5)
Filter/udp4_in-8 71.5ns ± 5% 65.9ns ± 1% -7.94% (p=0.008 n=5+5)
Filter/udp4_out-8 132ns ±13% 119ns ± 1% -10.29% (p=0.008 n=5+5)
Filter/icmp6-8 169ns ±10% 54ns ± 1% -68.35% (p=0.008 n=5+5)
Filter/tcp6_syn_in-8 149ns ± 6% 43ns ± 1% -71.11% (p=0.008 n=5+5)
Filter/tcp6_syn_out-8 37.7ns ± 4% 24.3ns ± 3% -35.51% (p=0.008 n=5+5)
Filter/udp6_in-8 179ns ± 5% 103ns ± 1% -42.75% (p=0.008 n=5+5)
Filter/udp6_out-8 156ns ± 3% 191ns ± 1% +22.54% (p=0.008 n=5+5)
Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
04ff3c91ee
wgengine/filter: add full IPv6 support.
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Part of #19 .
Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
a38e28da07
net/packet: documentation pass.
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Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
c2cc3acbaf
net/packet: remove NewIP, offer only a netaddr constructor.
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Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
d7ee3096dd
net/packet: documentation cleanups.
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Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
9ef39af2f2
net/packet: fix panic on invalid IHL field.
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Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
22bf48f37c
net/packet: remove {get,put}{16,32} indirection to encoding/binary.
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name old time/op new time/op delta
Decode/tcp4-8 28.8ns ± 2% 13.1ns ± 4% -54.44% (p=0.008 n=5+5)
Decode/tcp6-8 20.6ns ± 1% 12.6ns ± 2% -38.72% (p=0.008 n=5+5)
Decode/udp4-8 28.2ns ± 1% 12.1ns ± 4% -57.01% (p=0.008 n=5+5)
Decode/udp6-8 20.0ns ± 6% 12.1ns ± 2% -39.38% (p=0.008 n=5+5)
Decode/icmp4-8 21.7ns ± 2% 11.5ns ± 1% -47.01% (p=0.008 n=5+5)
Decode/icmp6-8 14.1ns ± 2% 11.8ns ± 4% -16.60% (p=0.008 n=5+5)
Decode/unknown-8 9.43ns ± 2% 9.30ns ± 3% ~ (p=0.222 n=5+5)
Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
55b1221db2
net/packet: support full IPv6 decoding.
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The packet filter still rejects all IPv6, but decodes enough from v6
packets to do something smarter in a followup.
name time/op
Decode/tcp4-8 28.8ns ± 2%
Decode/tcp6-8 20.6ns ± 1%
Decode/udp4-8 28.2ns ± 1%
Decode/udp6-8 20.0ns ± 6%
Decode/icmp4-8 21.7ns ± 2%
Decode/icmp6-8 14.1ns ± 2%
Decode/unknown-8 9.43ns ± 2%
Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
89894c6930
net/packet: add IPv6 source and destination IPs to Parsed.
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Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
6e52633c53
net/packet: record allocations in benchmark.
6 years ago
093431f5dd
net/packet: s/ParsedPacket/Parsed/ to avoid package stuttering.
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Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
427bf2134f
net/packet: rename from wgengine/packet.
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Signed-off-by: David Anderson <danderson@tailscale.com>
6 years ago
Brad Fitzpatrick
David Anderson
Josh Bleecher Snyder