This is to make life easier for users with customized build of
dnsmasq-full variant. Currently dnsmasq config generated by current
service script will be rejected by dnsmasq build lacking DHCP feature
- Options like --dhcp-leasefile have default values. Deleting them
from uci config or setting them to empty value will make them take on
default value in the end
- Options like --dhcp-broadcast are output unconditionally
Tackle this by
- Check availablility of features from output of "dnsmasq --version"
- Make a list of options guarded by HAVE_xx macros in src/options.c of
dnsmasq source code
- Ignore these options in xappend()
Two things to note in this implementation
- The option list is not exhaustive. Supposedly only those options that
may cause dnsmasq to reject with "unsupported option (check that
dnsmasq was compiled with DHCP/TFTP/DNSSEC/DBus support)" are taken
into account here
- This provides a way out but users' cooperation is still needed. E.g.
option dnssec needs to be turned off, otherwise the service script
will try to add --conf-file pointing to dnssec specific anchor file
which dnsmasq lacking dnssec support will reject
Resolves FS#2281
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
max_ttl - limit the ttl in the dns answer if greater as $max_ttl
min_cache_ttl - force caching of dns answers even the ttl in the answer
is lower than the $min_cache_ttl
max_cache_ttl - cache only dns answer for $max_cache_ttl.
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
This makes it clear that localuse when explicitly specified in the
config will have its final say on whether or not the initscript should
touch /etc/resolv.conf, no matter whatever the result of previous
guesswork would be
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Currently it seems impossible to configure /etc/config/dhcp to achieve
the following use case
- run dnsmasq with no-resolv
- re-generate /etc/resolv.conf with "nameserver 127.0.0.1"
Before this change, we have to set resolvfile to /tmp/resolv.conf.auto
to achive the 2nd effect above, but setting resolvfile requires noresolv
being false.
A new boolean option "localuse" is added to indicate that we intend to
use dnsmasq as the local dns resolver. It's false by default and to
align with old behaviour it will be true automatically if resolvfile is
set to /tmp/resolv.conf.auto
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Acked-by: Hans Dedecker <dedeckeh@gmail.com>
This patch fixes jailed dnsmasq running into the following issue:
|dnsmasq[1]: cannot read /usr/share/dnsmasq/dhcpbogushostname.conf: No such file or directory
|dnsmasq[1]: FAILED to start up
|procd: Instance dnsmasq::cfg01411c s in a crash loop 6 crashes, 0 seconds since last crash
Fixes: a45f4f50e1 ("dnsmasq: add dhcp-ignore-names support - CERT VU#598349")
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
[bump package release]
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
dnsmasq v2.80test8 adds the ability to ignore dhcp client's requests for
specific hostnames. Clients claiming certain hostnames and thus
claiming DNS namespace represent a potential security risk. e.g. a
malicious host could claim 'wpad' for itself and redirect other web
client requests to it for nefarious purpose. See CERT VU#598349 for more
details.
Some Samsung TVs are claiming the hostname 'localhost', it is believed
not (yet) for nefarious purposes.
/usr/share/dnsmasq/dhcpbogushostname.conf contains a list of hostnames
in correct syntax to be excluded. e.g.
dhcp-name-match=set:dhcp_bogus_hostname,localhost
Inclusion of this file is controlled by uci option dhcpbogushostname
which is enabled by default.
To be absolutely clear, DHCP leases to these requesting hosts are still
permitted, but they do NOT get to claim ownership of the hostname
itself and hence put into DNS for other hosts to be confused/manipulate by.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Refresh patches
Remove 240-ubus patch as upstream accepted.
Add uci option ubus which allows to enable/disable ubus support (enabled
by default)
Upstream commits since last bump:
da8b651 Implement --address=/example.com/#
c5db8f9 Tidy 7f876b64c22b2b18412e2e3d8506ee33e42db7c
974a6d0 Add --caa-record
b758b67 Improve logging of RRs from --dns-rr.
9bafdc6 Tidy up file parsing code.
97f876b Properly deal with unaligned addresses in DHCPv6 packets.
cbfbd17 Fix broken DNSSEC records in previous.
b6f926f Don't return NXDOMAIN to empty non-terminals.
c822620 Add --dhcp-name-match
397c050 Handle case of --auth-zone but no --auth-server.
1682d15 Add missing EDNS0 section. EDNS0 section missing in replies to EDNS0-containing queries where answer generated from --local=/<domain>/
dd33e98 Fix crash parsing a --synth-domain with no prefix. Problem introduced in 2.79/6b2b564ac34cb3c862f168e6b1457f9f0b9ca69c
c16d966 Add copyright to src/metrics.h
1dfed16 Remove C99 only code.
6f835ed Format fixes - ubus.c
9d6fd17 dnsmasq.c fix OPT_UBUS option usage
8c1b6a5 New metrics and ubus files.
8dcdb33 Add --enable-ubus option.
aba8bbb Add collection of metrics
caf4d57 Add OpenWRT ubus patch
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Remove creation of file /etc/ethers in dnsmasq init script as the
file is now created by default in the base-files package by
commit fa3301a28e
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
As dnsmasq is started earlier than netifd usage of network.sh functions
at boottime will fail; therefore don't call at boottime the functions
which construct the dhcp pool/relay info.
As interface triggers are installed the dhcp pool/relay info will be
constructed when the interface gets reported as up by netifd.
At the same time also register interface triggers based on DHCP relay
config.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Commit ecd954d530 installs specific interface triggers which rewrites the dnsmasq config
file and restarts dnsmasq if the network interface becomes active for which a trigger
has been installed.
In case no dhcp sections are specified or ignore is set to 1 dnsmasq will not be started
at startup which breaks DNS resolving.
Fix this by ditching the BOOT check in start_service and always start dnsmasq at startup.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Fix condir option processing allowing to use the format
"<directory>[,<file-extension>......]," as documented on the dnsmasq man
page which previously resulted into bogus dir being created.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
This reverts commit a03035dad1
as it has several issues:
-Host file is located in a directory which is not unique per dnsmasq instance
-odhcpd writes host info into the same directory but still sends a SIGHUP to dnsmasq
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
1.) "addn-hosts" per default point to a file (but it supports directory)
2.) "hostsdir" only support directory with the additional benefit: New or changed files are read automatically.
Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>
Right now interface.update events are sent out by netifd upon interface state,
route, address (lifetime), prefix lifetime changes.
Dnsmasq is only interested in interface state changes and currently adds an
interface trigger for all the "interface.*" events.
In combination with commit 23bba9cb33, which triggers a SIGHUP signal to dnsmasq,
IPv6 address/prefix lifetime changes on the wan will trigger dnsmasq reloads which
can become frequent in case of shorter lifetimes.
To avoid frequent dnsmasq reload, this patch adds specific interface triggers.
During dnsmasq init it loops dhcp uci section; if the value of the ignore option
is set to 0, then the corresponding interface trigger is not installed.
Otherwise, if the ignore option value is 1, then procd_add_interface_trigger is
called which adds the interface trigger.
Signed-off-by: hux <xinxing.huchn@gmail.com>
RFC6771 does not exclude the forwarding of the example domain as it
states : "Caching DNS servers SHOULD NOT recognize example names as
special and SHOULD resolve them normally."
Example domains cannot be assigned to any user or person by DNS
registrars as they're registered in perpetuity to IANA meaning
they can be resolved; therefore let's remove the example domains
from the rfc6761.conf file.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Improve portability of init script by declaring resolvfile as local
in dnsmasq_stop function.
Fixes resolvfile being set for older busybox versions in dnsmasq_start
in a multi dnsmasq instance config when doing restart; this happens when
the last instance has a resolvfile configured while the first instance
being started has noresolv set to 1.
Base on a patch by "Phil"
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Dnsmasq used SIGHUP to do too many things: 1) set dnssec time validation
enabled, 2) bump SOA zone serial, 3) clear dns cache, 4) reload hosts
files, 5) reload resolvers/servers files.
Many subsystems within LEDE can send SIGHUP to dnsmasq: 1) ntpd hotplug
(to indicate time is valid for dnssec) 2) odhcpd (to indicate a
new/removed host - typically DHCPv6 leases) 3) procd on interface state
changes 4) procd on system config state changes, 5) service reload.
If dnssec time validation is enabled before the system clock has been
set to a sensible time, name resolution will fail. Because name
resolution fails, ntpd is unable to resolve time server names to
addresses, so is unable to set time. Classic chicken/egg.
Since commits 23bba9cb33 (service reload) &
4f02285d8b (system config) make it more
likely a SIGHUP will be sent for events other than 'ntpd has set time'
it is more likely that an errant 'name resolution is failing for
everything' situation will be encountered.
Fortunately the upstream dnsmasq people agree and have moved 'check
dnssec timestamp enable' from SIGHUP handler to SIGINT.
Backport the upstream patch to use SIGINT.
ntpd hotplug script updated to use SIGINT.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Send a SIGHUP signal via procd to the dnsmasq service so the instance(s)
re-read(s) the /tmp/hosts/dhcp config.
Signed-off-by: Florian Eckert <fe@dev.tdt.de>
If the hostname in /etc/config/system is modified the dnsmasq should also
get triggered to rewrite/reload the config.
Signed-off-by: Florian Eckert <fe@dev.tdt.de>
Different invocations of the dnsmasq init script (e.g. at startup by procd)
will rewrite the dhcp host file which might result into dnsmasq reading an
empty dhcp host file as it is being rewritten by the dnsmasq init script.
Let the dnsmasq init script first write to a temp dhcp host file so it does
not overwrite the contents of the existing dhcp host file.
Reported-by: Hartmut Birr <e9hack@gmail.com>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Due to improper localization of helper variables, "config host" entries
without a given mac address may inherit the mac address of a preceeding,
leading to invalid generated netive configuration.
Fix the issue by marking the "macs" and "tags" helper variables in
dhcp_host_add() local, avoiding the need for explicitely resetting them
with each invocation.
Reported-by: Russell Senior <russell@personaltelco.net>
Tested-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Without this change, the instance-specific conf-file is being added to procd_add_jail_mount,
but not used by dnsmasq.
Signed-off-by: Emerson Pinter <dev@pinter.com.br>
This patch adds a parser for the uci representation of
dnsmasq's "-a | --listen-address" option.
In summary, this option forces dnsmasq to listen on the
given IP address(es). Both interface and listen-address
options may be given, in which case the set of both
interfaces and addresses is used.
Note that if no interface option is given, but listen_address is,
dnsmasq will not automatically listen on the loopback interface.
To achieve this, the loopback IP addresses, 127.0.0.1 and/or ::1
must be explicitly added.
This option is useful for ujailed dnsmasq instances, that would
otherwise fail to work properly, because listening to the
"This host on this network" address (aka 0.0.0.0 see rfc1700 page 4)
may not be allowed.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com> (PKG_RELEASE increase)
Init script won't append --no-dhcp-interface option if interface
protocol is one of: ncm, directip, qmi, mbim.
This is caused by IP address assigned to dynamically created netifd
interfaces. As a result there's no netmask assigned to the main
interface and dhcp_add() function returns prematurely.
By moving network subnet check we can ensure that --no-dhcp-interface is
properly generated for wwan interfaces.
Signed-off-by: Marcin Jurkowski <marcin1j@gmail.com>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com> [PKG_RELEASE increase; move network checks]
Currently, dnsmasq support assigning multiple tags to a host record
(--dhcp-host), but we only support only 1 tag for a host. The commit
makes the following config to be valid:
config host
option name 'computer'
option mac '00:11:22:33:44:55'
option ip '192.168.1.100'
list tag 'vendor_class'
list tag 'vendor_id'
config tag 'vendor_class'
list dhcp_option 'option:vendor-class,00:...<omitted>'
config tag 'vendor_id'
option force '1'
list dhcp_option 'option:vendor-id-encap,00:...<omitted>'
Signed-off-by: Kuang Rufan <kuangrufan@pset.suntec.net>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Introduce a new UCI list setting `list dhcp_option_force` which is available
in sections of type `dnsmasq` and `dhcp`.
The `dhcp_option_force` setting has the same semantics as `dhcp_option` but
generates `dhcp-option-force` directives instead of `dhcp-option` ones in
emitted native configuration.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Commit 5cd88f4 "dnsmasq: remove use of uci state for getting network ifname"
broke the ability to specify unmanaged network device names for inclusion
and exclusion in the uci configuration.
Restore support for raw device names by falling back to the input value
when "network_get_device" yields no result.
Fixes FS#876.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This is functionally the same as --server, but provides some syntactic sugar to
make specifying address-to-name queries easier.
For example --rev-server=1.2.3.0/24,192.168.0.1 is exactly equivalent to
--server=/3.2.1.in-addr.arpa/192.168.0.1
Signed-off-by: DUPONCHEEL Sébastien <sebastien.duponcheel@corp.ovh.com>
dnsmasq can match tags in its dhcp-range configuration, this commit adds
the option to configure it in the dhcp section
uci configuration:
config dhcp 'lan'
option interface 'lan'
list tag 'blue'
list tag '!red'
option start '10'
option limit '150'
option leasetime '12h'
generated dnsmasq configuration:
dhcp-range=tag:blue,tag:!red,set:lan,192.168.1.10,192.168.1.159,255.255.255.0,12h
Signed-off-by: Grégoire Delattre <gregoire.delattre@gmail.com>
With this patch the dnsmasq init script manages resolv.conf if and only if
when dnsmasq will listen on 127.0.0.1#53 (is main resolver instance).
Also, resolvfile is now set irrespective of the value of noresolv.
Fixes (partially) FS#785
Signed-off-by: Paul Oranje <por@xs4all.nl>
'non-wildcard' interfaces enables dnsmasq's '--bind-dynamic' mode. This
binds to interfaces rather than wildcard addresses *and* keeps track of
interface comings/goings via a unique Linux api.
Quoting dnsmasq's author "bind-dynamic (bind individual addresses, keep
up with changes in interface config) ... On linux, there's actually no
sane reason not to use --bind-dynamic, and it's only not the default for
historical reasons."
Let's change history, well on LEDE at least, and change the default!
Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
Commit b32689afd6 added support for dhcp-script hook.
Adding dhcp-script config option results into two instances of dnsmasq being run
which triggered oom issues on platforms having low memory.
The dnsmasq dhcp-script config option will now only be added if at least one of the
dhcp, tftp, neigh hotplug dirs has a regular hotplug file or if the dhcpscript uci
config option is specified.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
Adds a script which acts as a hook for when dnsmasq creates/destroys a
lease, or completes a TFTP file transfer. The hook loops through scripts
in appropriate directories inside '/etc/hotplug.d', executing each one with
the same arguments supplied by dnsmasq.
In case dnsmasq is jailed by ujail the dhcp-script hook will not work as
expected as ujail does not yet support executing a script within a jail.
Signed-off-by: Nick Brassel <nick@tzarc.org>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
When in ra server mode, configure nameservers passed in router
announcements from the dns value (which is already used by odhcpd).
This also fixes FS#677 by using the global IPv6 address of the router
instead of the link local address (if no nameservers are configured).
Signed-off-by: Arjen de Korte <build+lede@de-korte.org>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com> [PKG_RELEASE increase]
This patch adds the interface-name option for each dhcp config
in /etc/config/dhcp.
With the interface_name option users can define a DNS name for each dhcp section
that will be resolved by dnsmasq with the underlaying interface address.
For example:
config dhcp 'lan'
option interface 'lan'
...
list interface_name 'home.lan'
...
Signed-off-by: Daniel Danzberger <daniel@dd-wrt.com>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com> [PKG_RELEASE increase]
If there's a TFTP root directory configured, create it with mkdir -p
(which does not throw an error if the folder exists already)
before starting dnsmasq. This is useful for TFTP roots in /tmp, for example.
Originally submitted by nfw user aka Nathaniel Wesley Filardo
Signed-off-by: Alberto Bursi <alberto.bursi@outlook.it>
Configuring dhcp_option as an option does not allow the usage of white
spaces in the option value; fix this by supporting dhcp_option as a list
config while still supporting the option config to maintain backwards
compatibility
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
minor/cosmetic: fixes the following misleading message:
root@box:~ /etc/init.d/dnsmasq restart
sh: out of range
Signed-off-by: Bastian Bittorf <bb@npl.de>
Similar to odhcpd, allow using ISC DHCPd instead of dnsmasq.
Disable DHCP and/or DHCP6 in case ISC DHCP is present and
enabled.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
The relay section should use the logical interface name and
not the linux network device name directly. This to be
consistent with other sections of the dnsmasq config where
'interface' means the logical interface.
Signed-off-by: Karl Vogel <karl.vogel@gmail.com>
If noresolv is set, we should not generate a --resolv-file parameter.
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com> [minor cleanup]
