More Babeld updates

[jech]

@donaldsharp Thank you very much for https://github.com/FRRouting/frr/commit/db6d4c8375f32c11336f9542b558640c5c5915f2 . However, there's a couple of points that you appear to have missed:

1. Unknown flag bits in Hello TLVs should be silently ignored; your code ignores the whole TLV. Please remove the conditional at https://github.com/FRRouting/frr/blob/master/babeld/message.c#L438
2. All TLVs with unknown mandatory sub-TLVs must be ignored. This includes ACK_REQ, ACK, ROUTER_ID and NH. Please see the function parse_unknown_subtlv at https://github.com/jech/babeld/blob/master/message.c#L395

[donaldsharp]

Why don't you submit a PR here? If you know what to do then do it and I can get it in

[jech]

Donald, I'm maintaining the standalone babeld, and reviewing the patches that go into BIRD. I simply don't have the time or energy to be maintaining FRR's fork in addition to that. Sorry.

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This issue is stale because it has been open 180 days with no activity. Comment or remove the autoclose label in order to avoid having this issue closed.

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[jech]

Still relevant, please don't close.

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This issue will no longer be automatically closed.

[github-actions[bot]]

This issue is stale because it has been open 180 days with no activity. Comment or remove the autoclose label in order to avoid having this issue closed.

[frrbot[bot]]

This issue will be automatically closed in the specified period unless there is further activity.

[jech]

Still relevant.

[frrbot[bot]]

This issue will no longer be automatically closed.