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Bug#1064005: marked as done (netcfg: "get_netmask string 255.255.255.255" not working)

Your message dated Tue, 21 May 2024 12:49:36 +0000
with message-id <E1s9Ovw-008uDk-CW@fasolo.debian.org>
and subject line Bug#1064005: fixed in netcfg 1.189
has caused the Debian Bug report #1064005,
regarding netcfg: "get_netmask string 255.255.255.255" not working
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
1064005: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1064005
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Source: netcfg
Version: 1.187
Severity: normal

Dear Maintainer,

Setting a netmask of 255.255.255.255 (in my case using preseed, but I guess the same happens if using the UI)
fails the installer with Unreachable gateway (even if the gateway is set).
I agree it can be seen as an odd setup, but it's valid and works when configured manually in busybox and Linux.
My usecase is creating routed Debian VMs, where the host have a static route to the guest's IP (or v6 /128).
With a smaller subnet (like /23), we would have to use proxy ARP which is usually not recommended.

You can see more information in:
https://phabricator.wikimedia.org/phame/post/view/312/ganeti_on_modern_network_design/

My current workaround is to use a smaller netmask then run the following in early_command:
IFACE=$(ip -4 route list 0/0 | sed -r 's/.*dev ([^ ]*) .*/\1/' | head -1)
IP="$(ip address show dev $IFACE | egrep '^[[:space:]]+inet ' | cut -d ' ' -f 6 | cut -d '/' -f 1)"
ip addr del $IP dev $IFACE
ip addr add $IP/32 dev $IFACE
ip route add 10.192.24.1 dev $IFACE scope link
ip route add default via 10.192.24.1

Right after "netcfg"
It would of course be cleaner if netcfg were to handle a /32 "out of the box".

Similarly, DHCP can allocate such IPs, see for example :
https://blog.fhrnet.eu/2020/03/07/dhcp-server-on-a-32-subnet/
I haven't tested DHCP in Debian Installer with such setup though.

Please let me know if I can be of any help.

Thanks

-- System Information:
Debian Release: 12.5
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-18-amd64 (SMP w/1 CPU thread; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

--- End Message ---
--- Begin Message --- 
Source: netcfg
Source-Version: 1.189
Done: Colin Watson <cjwatson@debian.org>

We believe that the bug you reported is fixed in the latest version of
netcfg, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1064005@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Colin Watson <cjwatson@debian.org> (supplier of updated netcfg package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Tue, 21 May 2024 13:30:01 +0100
Source: netcfg
Architecture: source
Version: 1.189
Distribution: unstable
Urgency: medium
Maintainer: Debian Install System Team <debian-boot@lists.debian.org>
Changed-By: Colin Watson <cjwatson@debian.org>
Closes: 701139 1064005
Changes:
 netcfg (1.189) unstable; urgency=medium
 .
   [ Colin Watson ]
   * netcfg_activate_static_*: Add more logging.
   * Fix display of IPv6 netmasks in netcfg/confirm_static (closes: #701139).
   * Handle routing for single-address netmasks (closes: #1064005).
 .
   [ Updated translations ]
   * Welsh (cy.po) by Rhodri
   * Hungarian (hu.po) by SZERVÁC Attila
   * Macedonian (mk.po) by Kristijan Fremen Velkovski
   * Marathi (mr.po) by omwani
   * Dutch (nl.po) by Frans Spiesschaert
   * Occitan (oc.po) by Quentin PAGÈS
   * Punjabi (Gurmukhi) (pa.po) by Aman Alam
Checksums-Sha1:
 40d189888e131b0686208d1f0621f3d6f1e6fe50 1889 netcfg_1.189.dsc
 e482269bc946438bb1444c30d235dac5288dd92b 403604 netcfg_1.189.tar.xz
Checksums-Sha256:
 36709f729af2716c6b990681280e95148c9e38ddf4a6a1928f2fdc485bcecd7a 1889 netcfg_1.189.dsc
 197e87aaaf2c68c1c5bbb6c58b11aba74770a08001067db3c60fac22d0da0f96 403604 netcfg_1.189.tar.xz
Files:
 659fd2f9cdfd3419a8822a6ecbd1a26b 1889 debian-installer optional netcfg_1.189.dsc
 b8c64fa8fddba6111727b3debb6dd43f 403604 debian-installer optional netcfg_1.189.tar.xz

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