Package: apt-cacher-ng
Version: 3.6.4-1
Severity: normal
Tags: ipv6 upstream
Dear Maintainer,
apt-cacher-ng does not properly bind the network socket when the value of the
BindAddress variable is a plain IPv6 address whose last group is a integer
number (and could thus be interpreted as a port).
These do work as expected:
BindAddress=127.0.0.1 -> binds to 127.0.0.1:3142
BindAddress=127.0.0.1:8080 -> binds to 127.0.0.1:8080
BindAddress=::abcd -> binds to [::abcd]:3142
BindAddress=[::abcd]:8080 -> binds to [::abcd]:8080
BindAddress=[::1]:8080 -> binds to [::1]:8080
This does not work while it should:
BindAddress=::1 -> binds to nothing but should be [::1]:3142
These do not work, but that may be intentional since the square bracket
notation is only used in conjunction with a port:
BindAddress=[::abcd] -> binds to nothing, could be [::abcd]:3142
BindAddress=[::1] -> binds to nothing, could be [::1]:3142
When the last group is a integer, it gets cut off and used as a port:
BindAddress=::abcd:1234 -> binds to [::abcd]:1234 but should be
[::abcd:1234]:3142
BindAddress=:::1 -> binds to [::]:1 but should throw an "invalid
address" error
Plain IPv6 addresses worked fine on buster (also did on stretch and jessie), but not on bullseye
anymore. The systemd service starts successfully but listens on no port/address. Depending on the
BindAddress, the error message I got was either "Error resolving address for binding: Invalid
argument" when the cut-off IPv6 address was invalid, or "Couldn't bind socket: Cannot
assign requested address" when the cut-off IPv6 address was valid but no interface had it
assigned. Raising the debug level did not turn up more information, but I did not try with a debug
build. I think this issue is related to the new BindAddress port syntax and some parse-confusion
with the colons.
In the meantime I am using the [IPv6]:Port syntax as a workaround, since that
is working as expected in all cases.
-- Package-specific info:
-- System Information:
Debian Release: 11.0
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 5.10.0-8-amd64 (SMP w/8 CPU threads)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8),
LANGUAGE=en_GB:en
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages apt-cacher-ng depends on:
ii adduser 3.118
ii debconf [debconf-2.0] 1.5.77
ii dpkg 1.20.9
ii libbz2-1.0 1.0.8-4
ii libc6 2.31-13
ii libevent-2.1-7 2.1.12-stable-1
ii libevent-pthreads-2.1-7 2.1.12-stable-1
ii libgcc-s1 10.2.1-6
ii liblzma5 5.2.5-2
ii libssl1.1 1.1.1k-1+deb11u1
ii libstdc++6 10.2.1-6
ii libsystemd0 247.3-6
ii libwrap0 7.6.q-31
ii lsb-base 11.1.0
ii zlib1g 1:1.2.11.dfsg-2
Versions of packages apt-cacher-ng recommends:
ii ca-certificates 20210119
Versions of packages apt-cacher-ng suggests:
pn avahi-daemon <none>
pn doc-base <none>
pn libfuse2 <none>
-- Configuration Files:
/etc/apt-cacher-ng/acng.conf changed [not included]
/etc/apt-cacher-ng/security.conf changed [not included]
/etc/cron.daily/apt-cacher-ng changed [not included]
-- debconf information:
apt-cacher-ng/port: keep
apt-cacher-ng/gentargetmode: No automated setup
apt-cacher-ng/cachedir: keep
apt-cacher-ng/bindaddress: keep
apt-cacher-ng/proxy: keep
* apt-cacher-ng/tunnelenable: false
