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wgengine/magicsock: make peerMap also keyed by NodeID

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In prep for incremental netmap update plumbing (#1909), make peerMap
also keyed by NodeID, as all the netmap node mutations passed around
later will be keyed by NodeID.

In the process, also:

* add envknob.InDevMode, as a signal that we can panic more aggressively
  in unexpected cases.
* pull two moderately large blocks of code in Conn.SetNetworkMap out
  into their own methods
* convert a few more sets from maps to set.Set

Updates #1909

Change-Id: I7acdd64452ba58e9d554140ee7a8760f9043f961
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2023-09-11 10:13:00 -07:00
committed by Brad Fitzpatrick
parent 683ba62f3e
commit d050700a3b
8 changed files with 188 additions and 84 deletions
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1
wgengine/magicsock/endpoint.go
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@@ -49,6 +49,7 @@ type endpoint struct {
// These fields are initialized once and never modified.
c *Conn
nodeID tailcfg.NodeID
publicKey key.NodePublic // peer public key (for WireGuard + DERP)
publicKeyHex string // cached output of publicKey.UntypedHexString
fakeWGAddr netip.AddrPort // the UDP address we tell wireguard-go we're using