[konsole] [Bug 441889] New: SSH Manager does not allow port numbers greater than 9999

[Iris Morelle]

https://bugs.kde.org/show_bug.cgi?id=441889

            Bug ID: 441889
           Summary: SSH Manager does not allow port numbers greater than
                    9999
           Product: konsole
           Version: 21.08.0
          Platform: Debian unstable
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: shadowm2006 at gmail.com
  Target Milestone: ---

SUMMARY

The new SSH Manager plugin does not accept port numbers above 9999. This is a
bit of a problem for my own use case, where I have access to systems with ssh
servers listening on port numbers well above 10000.


STEPS TO REPRODUCE

1. Use Plugins -> Show SSH Manager
2. Click on Add to add a new SSH configuration
3. Attempt to enter 12345 into the Port field

OBSERVED RESULT

The maximum port number that may be entered is 9999.

EXPECTED RESULT

The maximum port number that may be entered should be a larger number above
9999 and below 65536 (see Additional Information below).

SOFTWARE/OS VERSIONS

Linux: Debian sid, Linux kernel 5.13.10
KDE Plasma Version: 5.22.5
KDE Frameworks Version: 5.85.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION

While the idea of validating port numbers is nice, the issue with getting too
specific with it is that the range for non-ephemeral ports can vary by platform
and individual system configuration. For Linux in particular, the default range
for ephemeral ports (configurable via procfs
/proc/sys/net/ipv4/ip_local_port_range) is 32768-60999, allowing ports 1
through 32767 to be used for anything else. Meanwhile, IANA recommends people
to use 49152-65535 for ephemeral ports.

The validation check can be changed to accept port numbers with 5 digits
instead of 4 since port numbers are currently 16-bit unsigned integers. If the
devs prefer, the port number can be checked to be less than or equal than
65535, but again getting more specific than that is bound to cause
incompatibilities with edge cases.

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