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fix(ssh): allow multiplexed connection #3658

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A Multiplexing connection can send more than one channel request over the same socket, making possible reuse the authentication method used by the master in the derivate ones.

To support it, we should only allow the GliderSSH's server to dial with the connection on the agent's side, removing our intervention on the protocol flow, that enforces the channel limitation, just sending the device's response to the client.

Closes #3656

@henrybarreto henrybarreto self-assigned this Mar 28, 2024
@henrybarreto henrybarreto requested a review from a team as a code owner March 28, 2024 15:38
A Multiplexing connection can send more than one channel request over
the same socket, making possible reuse the authentication method used by
the master in the derivate ones.

To support it, we should only allow the GliderSSH's server to dial with
the connection on the agent's side, removing our intervention on the
protocol flow, that enforces the channel limitation, just sending the
device's response to the client.

Closes #3656
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Delayed for another moment

@henrybarreto henrybarreto deleted the fix/ssh_multiplexing branch April 29, 2024 13:10
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Multiplexed Connections Rejected with 'Shared Connection Closed'
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