iptunnel: add support for ipip, ipip6 and ip6ip6 tunnels #182
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All these tunnels use the IFLA_IPTUN_* netlink API. Therefore, both IFLAN_INFO_KIND "ipip" and "ip6tnl" data is serialized using the IpTunnel struct. Unit tests added. Co-authored-by: Fernando Fernandez Mancera <ffmancera@riseup.net> Co-authored-by: Wen Liang <liangwen12year@gmail.com> Signed-off-by: Jan Vaclav <jvaclav@redhat.com>
According to the IANA protocol number specification (https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml), protocol numbers are always within the u8 range. Using `as` for type conversion is dangerous because it can silently discard higher-order data, leading to bugs that are hard to detect. This change ensures all protocol number conversions are type-safe and explicit, avoiding accidental data loss and aligning the code with the protocol specification.
Signed-off-by: Jan Vaclav <jvaclav@redhat.com>
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cathay4t
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Oct 11, 2025
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This is a continuation of work done in #155, #167.
Resolves: https://issues.redhat.com/browse/NMT-1372