Ticket #3654 (new defect)
Broken sftp connection when uploading files to SSHDroid
| Reported by: | x905 | Owned by: | |
|---|---|---|---|
| Priority: | major | Milestone: | Future Releases |
| Component: | mc-vfs | Version: | master |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Branch state: | no branch | Votes for changeset: |
Description
in 4.8.17 has been broken sftp connection command
server is sshdroid on android device
4.8.17 can connect, browse files and upload small files (up to 20 kb), but 30 kb cant - and hangs
4.8.15 in same situation works fine (except error -31 as always)
some add info https://www.linux.org.ru/forum/midnight/12592086
Change History
comment:5 Changed 7 years ago by zaytsev
Is it still present in current master after all SFTP fixes we've done so far?
comment:6 Changed 7 years ago by x905
GNU Midnight Commander 729f6ee - bug still present
Coping file from device to host - ok
Coping file to device from host - fails
Device is android with SSHDroid
comment:7 Changed 7 years ago by zaytsev
- Summary changed from 4.8.17 broken sftp connection to Broken sftp connection when uploading files to SSHDroid
- Version changed from 4.8.17 to master
- Milestone changed from 4.8.21 to 4.8.22
Ok, thanks for the info. That's sad, but someone needs to invest time to reproduce and fix it...
comment:8 Changed 6 years ago by andrew_b
I installed Android_x86-7.1-r2 in virtual machine.
After a series of experiments I found out the following.
Currently, the maximum size of the buffer used to copy/move data (the data chunk) is 128K, regardless of source and destination. On my PC, my local openssh-7.2p server works fine with such data chunks, but SSHDroid doesn't. I got the correct data transfer to Android only after I set the buffer size down to 16K.
I don't have a nice way to fix this yet.
comment:17 Changed 11 months ago by zaytsev
- Milestone changed from 4.8.31 to 4.8.32
Maybe make a loop halving the buffer till 4K if getting an error and only then failing?
maybe #3406