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net/routetable: include unknown flags in the routetable doctor output

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As part of the work on #7248 I wanted to know all of the flags on the
RouteMessage struct that we get back from macOS. Though it doesn't turn
out to be useful (when using an exit node/Tailscale is the default route,
the flags for the physical interface routes are the same), it still seems
useful from a debugging/comprehensiveness perspective.

Adds additional Darwin flags that were output once I enabled this mode.

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This commit is contained in:
Mihai Parparita 2023-02-10 15:14:23 -08:00 committed by Mihai Parparita
parent 7d204d89c2
commit 21fda7f670
2 changed files with 15 additions and 0 deletions
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10
net/routetable/routetable_bsd.go
View File

@ -64,6 +64,16 @@ func (r RouteEntryBSD) Format(f fmt.State, verb rune) {
}
pr("Flags: %v", r.Flags)
unknownFlags := r.RawFlags
for fv := range flags {
if r.RawFlags&fv == fv {
unknownFlags &= ^fv
}
}
if unknownFlags != 0 {
pr("UnknownFlags: %x ", unknownFlags)
}
w.WriteString("}")
}).Format(f, verb)
}

5
net/routetable/routetable_darwin.go
View File

@ -23,9 +23,14 @@
unix.RTF_GLOBAL: "global",
unix.RTF_HOST: "host",
unix.RTF_IFSCOPE: "ifscope",
unix.RTF_LOCAL: "local",
unix.RTF_MULTICAST: "multicast",
unix.RTF_REJECT: "reject",
unix.RTF_ROUTER: "router",
unix.RTF_STATIC: "static",
unix.RTF_UP: "up",
// More obscure flags, just to have full coverage.
unix.RTF_LLINFO: "{RTF_LLINFO}",
unix.RTF_PRCLONING: "{RTF_PRCLONING}",
unix.RTF_CLONING: "{RTF_CLONING}",
}