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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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16
envknob/envknob.go
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@@ -389,12 +389,24 @@ func CanTaildrop() bool { return !Bool("TS_DISABLE_TAILDROP") }
// SSHPolicyFile returns the path, if any, to the SSHPolicy JSON file for development.
func SSHPolicyFile() string { return String("TS_DEBUG_SSH_POLICY_FILE") }
// SSHIgnoreTailnetPolicy is whether to ignore the Tailnet SSH policy for development.
// SSHIgnoreTailnetPolicy reports whether to ignore the Tailnet SSH policy for development.
func SSHIgnoreTailnetPolicy() bool { return Bool("TS_DEBUG_SSH_IGNORE_TAILNET_POLICY") }
// TKASkipSignatureCheck is whether to skip node-key signature checking for development.
// TKASkipSignatureCheck reports whether to skip node-key signature checking for development.
func TKASkipSignatureCheck() bool { return Bool("TS_UNSAFE_SKIP_NKS_VERIFICATION") }
// CrashOnUnexpected reports whether the Tailscale client should panic
// on unexpected conditions. If TS_DEBUG_CRASH_ON_UNEXPECTED is set, that's
// used. Otherwise the default value is true for unstable builds.
func CrashOnUnexpected() bool {
if v, ok := crashOnUnexpected().Get(); ok {
return v
}
return version.IsUnstableBuild()
}
var crashOnUnexpected = RegisterOptBool("TS_DEBUG_CRASH_ON_UNEXPECTED")
// NoLogsNoSupport reports whether the client's opted out of log uploads and
// technical support.
func NoLogsNoSupport() bool {