feat: C daemon

[XavierChanth]

- What I did

• Feature complete C daemon for an alpha phase:

  • Still some minor, known memory leaks which will be addressed in future PRs
  • Some of these are in the atSDK

• Missing features:

  • npt_request
  • srv --multi (needed for npt_request)
  • device not showing up in list-devices

- How I did it

- How to verify it

- Description for the changelog
feat: C daemon

[XavierChanth]

Jeremy is doing a manual test, once that is done please merge @JeremyTubongbanua

[XavierChanth]

Once this is merged I will tag c0.1.0

[JeremyTubongbanua]

Confirmed working manual test

Using v5.3.0 client (@Soccer0) and C Daemon device (@soccer99)

[JeremyTubongbanua]

Some issues I ran into

1. Building C Daemon SSHNPD

Ubuntu installed cmake 3.22 which was not sufficient for our builds, so I had to find a way to install cmake 3.29.

To install cmake 3.29, I used pip by:

sudo apt-get install -y python3-pip
pip install cmake==3.29
pip install -v | grep cmake

# I find `/jeremyvps/.local/lib/python3.10/site-packages/cmake/data/bin` as the bin folder for the cmake binary that pip installed for me

nano ~/.bashrc

# Add line `export PATH="$PATH:/jeremyvps/.local/lib/python3.10/site-packages/cmake/data/bin` to my ~/.bashrc

# Update bash
source ~/.bashrc

cmake --version # Should be 3.29

2. v5.3.0 client-side sshnp key exchange errors

Would run into this error:

v5.3.0 client

./sshnp -f @soccer0 -t @soccer99 -h @rv_eu -i ~/.ssh/id_ed25519 -d vps
2024-06-12 13:38:34.291944 : Sending daemon feature check request
2024-06-12 13:38:34.292038 : Resolving remote username for user session
2024-06-12 13:38:34.714188 : Resolving remote username for tunnel session
2024-06-12 13:38:34.714918 : Fetching host and port from srvd
2024-06-12 13:38:35.814524 : Received host and port from srvd
2024-06-12 13:38:35.814611 : Waiting for daemon feature check response
2024-06-12 13:38:35.814624 : Received daemon feature check response
2024-06-12 13:38:35.816947 : Required daemon features are supported
2024-06-12 13:38:35.949207 : Sending session request to the device daemon
2024-06-12 13:38:36.047653 : Waiting for response from the device daemon
2024-06-12 13:38:36.503629 : Received response from the device daemon
2024-06-12 13:38:36.508431 : Creating connection to socket rendezvous
2024-06-12 13:38:36.633964 : Starting user session
kex_exchange_identification: Connection closed by remote host
Connection closed by 127.0.0.1 port 54167

After a couple of retries, to different rendezvous servers (am, eu, ap), it would work eventually.

Example of it working:

./sshnp -f @soccer0 -t @soccer99 -h @rv_am -i ~/.ssh/id_ed25519 -d vps
2024-06-12 13:43:13.994642 : Sending daemon feature check request
2024-06-12 13:43:13.994709 : Resolving remote username for user session
2024-06-12 13:43:14.404192 : Resolving remote username for tunnel session
2024-06-12 13:43:14.404510 : Fetching host and port from srvd
2024-06-12 13:43:15.780340 : Received host and port from srvd
2024-06-12 13:43:15.780446 : Waiting for daemon feature check response
2024-06-12 13:43:15.780458 : Received daemon feature check response
2024-06-12 13:43:15.784427 : Required daemon features are supported
2024-06-12 13:43:15.855798 : Sending session request to the device daemon
2024-06-12 13:43:15.962725 : Waiting for response from the device daemon
2024-06-12 13:43:16.575239 : Received response from the device daemon
2024-06-12 13:43:16.580149 : Creating connection to socket rendezvous
2024-06-12 13:43:16.706060 : Starting user session
Warning: Permanently added '[localhost]:54308' (ED25519) to the list of known hosts.