mobile-shell / mobile-shell/mosh
zmodem file transfer doesn't work over mosh
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feature
- Dominant language
- C++
- Stars
- 14.5k
- Forks
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Description
sz/rz commands don't work through mosh and it would be nice if they could.
consider the following use-case:
$ screen # on local laptop,
press ^a then enter :zmodem catch to enable zmodem receive on the laptop.
(screen)$ mosh host1
host1$ ssh host2
host2$ sz file.c
i think support could be easier than other byte-oriented protocols, because:
- zmodem frames are very easy to recognise (in the terminal parser and keyboard input)
- zmodem frames are small (1k in traditional; 8k in lszrz a popular zmodem implementation), so they fit inside (fragmented) a udp packet and if packets are lost, zmodem can shrink the window
- zmodem retries automatically, so packet delivery isn't required
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the terminal parser and keyboard-input paths mentioned in the issue, along with how mosh handles the nested ssh host2 session. Use the screen/mosh/ssh/sz file.c example as the acceptance case; done means zmodem transfer works through mosh, including fragmented or lost packets.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- networking
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100