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Fix rootlesskit port forwarder with custom slirp cidr

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The source ip for the rootlesskit port forwarder was hardcoded to the
standard slirp4netns ip. This is incorrect since users can change the
subnet used by slirp4netns with `--network slirp4netns:cidr=10.5.0.0/24`.
The container interface ip is always the .100 in the subnet. Only when
the rootlesskit port forwarder child ip matches the container interface
ip the port forwarding will work.

Fixes #9828

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>
This commit is contained in:
Paul Holzinger
2021-04-05 21:02:21 +02:00
parent 8465626e31
commit f99b7a314b
3 changed files with 50 additions and 28 deletions
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2
libpod/networking_linux.go
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@ -577,7 +577,7 @@ func (r *Runtime) setupRootlessNetNS(ctr *Container) error {
// set up port forwarder for CNI-in-slirp4netns
netnsPath := ctr.state.NetNS.Path()
// TODO: support slirp4netns port forwarder as well
return r.setupRootlessPortMappingViaRLK(ctr, netnsPath)
return r.setupRootlessPortMappingViaRLK(ctr, netnsPath, "")
}
return nil
}