tailscale/ipn
Brad Fitzpatrick f343b496c3 wgengine, all: remove LazyWG, use wireguard-go callback API for on-demand peers
Replace the UAPI text protocol-based wireguard configuration with
wireguard-go's new direct callback API (SetPeerLookupFunc,
SetPeerByIPPacketFunc, RemoveMatchingPeers, SetPrivateKey).

Instead of computing a trimmed wireguard config ahead of time upon
control plane updates and pushing it via UAPI, install callbacks so
wireguard-go creates peers on demand when packets arrive. This removes
all the LazyWG trimming machinery: idle peer tracking, activity maps,
noteRecvActivity callbacks, the KeepFullWGConfig control knob, and the
ts_omit_lazywg build tag.

For incoming packets, PeerLookupFunc answers wireguard-go's questions
about unknown public keys by looking up the peer in the full config.
For outgoing packets, PeerByIPPacketFunc (installed from
LocalBackend.lookupPeerByIP) maps destination IPs to node public keys
using the existing nodeByAddr index.

Updates tailscale/corp#12345

Change-Id: I4cba80979ac49a1231d00a01fdba5f0c2af95dd8
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2026-04-29 19:46:19 -07:00
..
auditlog all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
conffile all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
desktop ipn/desktop: use runtime.Pinner to force heap-allocation of msg 2026-04-07 12:55:11 -05:00
ipnauth all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
ipnext feature/conn25,ipn/ipnext,ipn/ipnlocal: add ExtraRouterConfigRoutes hook 2026-03-25 19:28:33 -07:00
ipnlocal wgengine, all: remove LazyWG, use wireguard-go callback API for on-demand peers 2026-04-29 19:46:19 -07:00
ipnserver ipn/ipnserver: use peercreds for actor.Username on freebsd (for Taildrive) 2026-03-24 20:35:56 -07:00
ipnstate types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
lapitest types/ptr: deprecate ptr.To, use Go 1.26 new 2026-03-05 20:13:18 -08:00
localapi tstest/natlab/vmtest: add TestDiscoKeyChange 2026-04-29 12:58:00 -07:00
policy all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
store all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
backend_test.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
backend.go ipn/ipnlocal: add netmap mutations to the ipn bus (#19120) 2026-04-09 15:45:41 -04:00
conf_test.go ipn: reject advertised routes with non-address bits set (#18649) 2026-03-20 10:10:43 -07:00
conf.go ipn: fix the typo causing NoSNAT always set to true (#19110) 2026-03-24 16:41:58 -04:00
doc.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
ipn_clone.go tailcfg: reintroduce UserProfile.Groups 2026-03-09 11:08:45 +00:00
ipn_test.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
ipn_view.go tailcfg: reintroduce UserProfile.Groups 2026-03-09 11:08:45 +00:00
prefs_test.go cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
prefs.go ipn, cmd/tailscale/cli: allow setting FQDN sans dot as an exit node 2026-04-01 20:42:35 +01:00
serve_expand_test.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
serve_test.go cmd/vet: add subtestnames analyzer; fix all existing violations 2026-04-05 15:52:51 -07:00
serve.go all: use Go 1.26 things, run most gofix modernizers 2026-03-06 13:32:03 -08:00
store_test.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00
store.go all: remove AUTHORS file and references to it 2026-01-23 15:49:45 -08:00