When starting a validator, the node initially joins gossip with
shred_verison = 0, until it adopts the entrypoint's shred-version:
https://github.com/solana-labs/solana/blob/9b182f408/validator/src/main.rs#L417
Depending on the load on the entrypoint, this adopting entrypoint
shred-version through gossip sometimes becomes very slow, and causes
several problems in gossip because we have to partially support
shred_version == 0 which is a source of leaking crds values from one
cluster to another. e.g. see
https://github.com/solana-labs/solana/pull/17899
and the other linked issues there.
In order to remove shred_version == 0 from gossip, this commit adds
shred-version to ip-echo-server response. Once the entrypoints are
updated, on validator start-up, if --expected_shred_version is not
specified we will obtain shred-version from the entrypoint using
ip-echo-server.
* Update tonic & prost, and regenerate proto
* Reignore doc code
* Revert pull #14367, but pin tokio to v0.2 for jsonrpc
* Bump backoff and goauth -> and therefore tokio
* Bump tokio in faucet, net-utils
* Bump remaining tokio, plus tarpc
* Don't start if udp port is really closed
* Fully check all udp ports
* Remove test code.......
* Add tests and adjust impl a bit
* Add comment
* Move comment a bit
* Move a bit
* clean ups
