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wgengine/router: rewrite netfilter and routing logic.

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New logic installs precise filters for subnet routes,
plays nice with other users of netfilter, and lays the
groundwork for fixing routing loops via policy routing.

Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson
2020-05-01 18:55:38 -07:00
parent 7618d7e677
commit 89198b1691
3 changed files with 388 additions and 88 deletions
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2
wgengine/userspace.go
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@@ -385,6 +385,8 @@ func (e *userspaceEngine) Reconfig(cfg *wgcfg.Config, dnsDomains []string) error
Cfg: cfg,
DNS: cfg.DNS,
DNSDomains: dnsDomains,
// HACK HACK HACK DO NOT SUBMIT just testing before further plumbing
SubnetRoutes: []wgcfg.CIDR{{IP: wgcfg.IPv4(192, 168, 17, 0), Mask: 24}},
}
// TODO(apenwarr): all the parts of RouteSettings should be "relevant."