PDP-10 / PDP-10/its

UP/DOWN don't handle IP numbers

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bug
Dominant language
Assembly
Stars
954
Forks
97
PR merge metrics
No merged PRs in 30d

Description

UP fails when given an IP number:

:up 178.18.91.250
The Host Table appears to be unavailable. Sure it isnt April Fools' day?

The failing code is this:

movei   a,tablespace    ;page number
movei   b,wrkch
pushj   p,netwrk"hstmap ;get the host table for hstlook
 jrst  deadnet

Similar code works fine in FTPU:

MOVEI A,LSTPAG
MOVEI B,0
PUSHJ P,NETWRK"HSTMAP   ;Read in HOSTS3 at LSTPAG
 .LOSE

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the UP and DOWN command handlers and the shown NETWRK"HSTMAP call. Compare its arguments and table-page handling with the FTPU HSTMAP example, then reproduce :up 178.18.91.250. Done means numeric IP input no longer reports that the Host Table is unavailable, with DOWN covered as well.

Written by the indexing model from the issue text.

Assessment

Domain
networking, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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