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feature/capture: move packet capture to feature/*, out of iOS + CLI

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We had the debug packet capture code + Lua dissector in the CLI + the
iOS app. Now we don't, with tests to lock it in.

As a bonus, tailscale.com/net/packet and tailscale.com/net/flowtrack
no longer appear in the CLI's binary either.

A new build tag ts_omit_capture disables the packet capture code and
was added to build_dist.sh's --extra-small mode.

Updates #12614

Change-Id: I79b0628c0d59911bd4d510c732284d97b0160f10
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2025-01-23 20:39:28 -08:00
committed by Brad Fitzpatrick
parent 2c98c44d9a
commit 68a66ee81b
23 changed files with 620 additions and 484 deletions
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net/packet/packet.go
-8
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@@ -34,14 +34,6 @@ const (
TCPECNBits TCPFlag = TCPECNEcho | TCPCWR
)
// CaptureMeta contains metadata that is used when debugging.
type CaptureMeta struct {
DidSNAT bool // SNAT was performed & the address was updated.
OriginalSrc netip.AddrPort // The source address before SNAT was performed.
DidDNAT bool // DNAT was performed & the address was updated.
OriginalDst netip.AddrPort // The destination address before DNAT was performed.
}
// Parsed is a minimal decoding of a packet suitable for use in filters.
type Parsed struct {
// b is the byte buffer that this decodes.