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NetworkManager/shared/n-dhcp4
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Exact
Beniamino Galvani ae85fe85f3 n-dhcp4/probe: forget lease after a NAK 
If we have a lease and we get a NAK renewing/rebinding it, the lease
is lost.

Without this, probe->current_lease remains set and after the next
DISCOVER/OFFER round, any call to n_dhcp4_client_lease_select() will
fail at:

        if (lease->probe->current_lease)
                return -ENOTRECOVERABLE;

As in:

 [5325.1313] dhcp4 (veth0): send REQUEST of 172.25.1.200 to 255.255.255.255
 [5325.1434] dhcp4 (veth0): received NACK from 172.25.1.1
 [5325.1435] dhcp4 (veth0): client event 3 (RETRACTED)
 [5325.1436] dhcp4 (veth0): send DISCOVER to 255.255.255.255
 [5325.1641] dhcp4 (veth0): received OFFER of 172.25.1.200 from 172.25.1.1
 [5325.1641] dhcp4 (veth0): client event (OFFER)
 [5325.1641] dhcp4 (veth0): selecting lease failed: -131 (ENOTRECOVERABLE)

Upstream: https://github.com/nettools/n-dhcp4/pull/33
Upstream: e4af93228e

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/993

Fixes: e43b1791a3 ('Merge commit 'e23b3c9c3ac86b065eef002fa5c4321cc4a87df2' as 'shared/n-dhcp4'')

(cherry picked from commit e141cd45d6)
(cherry picked from commit e056a68d21)
(cherry picked from commit 6636c792bd)
(cherry picked from commit 631dff08a0)
(cherry picked from commit 966d45bc7d)
2022-07-25 16:10:23 +02:00
..
.github/workflows nettools: reimport nettools' n-dhcp4 and rework logging 2020-06-03 22:34:22 +02:00
src n-dhcp4/probe: forget lease after a NAK 2022-07-25 16:10:23 +02:00
subprojects nettools: reimport nettools' n-dhcp4 and rework logging 2020-06-03 22:34:22 +02:00
.editorconfig Merge commit 'e23b3c9c3ac86b065eef002fa5c4321cc4a87df2' as 'shared/n-dhcp4' 2019-05-25 02:02:04 +02:00
.gitmodules Merge commit 'e23b3c9c3ac86b065eef002fa5c4321cc4a87df2' as 'shared/n-dhcp4' 2019-05-25 02:02:04 +02:00
AUTHORS Merge commit 'e23b3c9c3ac86b065eef002fa5c4321cc4a87df2' as 'shared/n-dhcp4' 2019-05-25 02:02:04 +02:00
meson.build nettools: reimport nettools' n-dhcp4 and rework logging 2020-06-03 22:34:22 +02:00
NEWS.md Merge commit 'e23b3c9c3ac86b065eef002fa5c4321cc4a87df2' as 'shared/n-dhcp4' 2019-05-25 02:02:04 +02:00
README.md Merge commit 'e23b3c9c3ac86b065eef002fa5c4321cc4a87df2' as 'shared/n-dhcp4' 2019-05-25 02:02:04 +02:00

README.md

n-dhcp4

Dynamic Host Configuration Protocol for IPv4

The n-dhcp4 project implements the IPv4 Dynamic Host Configuration Protocol as defined in RFC-2132+.

Project

Requirements

The requirements for this project are:

  • Linux kernel >= 3.19
  • libc (e.g., glibc >= 2.16)

At build-time, the following software is required:

  • meson >= 0.41
  • pkg-config >= 0.29

Build

The meson build-system is used for this project. Contact upstream documentation for detailed help. In most situations the following commands are sufficient to build and install from source:

mkdir build
cd build
meson setup ..
ninja
meson test
ninja install

No custom configuration options are available.

Repository:

License:

  • Apache-2.0 OR LGPL-2.1-or-later
  • See AUTHORS file for details.