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The hostname buffer is uninitialized if the client doesn't provide
DHCPV4_OPT_HOSTNAME. Use hostname from the assignment which is present if
a static lease contains the hostname or if the client provides one, and
the hostname is valid. It's also used in the ubus ipv4leases method.
Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
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Add dhcpv6_hostid_len config option which controls the number
of bits in the host identifier of dynamically assigned IPv6
addresses. The default is 12 bits which is also the minimum.
The maximum is the whole interface identifier, i.e. 64 bits.
Allow up to 64 bit wide hostid in static leases.
Fixes #84 and #27.
Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Preferred lifetime cannot be greater than the valid lifetime of an IA;
fix this by checking if the preferred lifetime does not exceed the
valid lifetime of an IA
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Fixes commit a12fcb3cee2d489b8648a2398812d7bed2f25faa which wrongly
removed setting ra_flags to 0
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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An invalid config setting for an interface lead to a flush of all config
settings of the related interface and thus made the interface unusable.
Change the behavior by logging config parse failures to syslog and
not flushing all config settings
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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src/odhcpd.c:143:2: error: format not a string literal, argument types not checked [-Werror=format-nonliteral]
snprintf(buf, sizeof(buf), sysctl_pattern, ifname, what);
^~~~~~~~
cc1: all warnings being treated as errors
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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The prefix_filter allows to select which prefix should be assigned
to clients if you have multiple prefixes on an interface.
Currently, the filter only applies to RAs and does work with
a dhcpv6 server.
This commit enables the filter also on dhcpv6.
Signed-off-by: Nick Hainke <vincent@systemli.org>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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"valid_lft" and "preferred_lft" are different. If the "preferred_lft"
is expired the prefix should be avoided in source prefix selection.
However, the interface is allowed to still receive downstream traffic.
preferred_lfetime:
Limit for preferred lifetime of a prefix
If you want the old behavior, you have to set preferred_lifetime to
the same value as leasetime.
Signed-off-by: Nick Hainke <vincent@systemli.org>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Remove the checks as they're leftovers of the old static lease
implementation which created assigments with assigned equal to 0
whihc is not the case anymore in the reworked static lease
implementation
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Make sure IA_PD prefixes for which no preferred and valid lifetimes
can be returned are included in the reply with a preferred and valid
lifetime to 0.
Therefore exclude IPv6 prefixes with an invalid prefix length as
well so IA_PD prefixes for which not a preferred/valid lifetime is
returned are included with a preferred and valid lifetime set to 0
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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When an IPv6 address change is triggered each PD assignment is checked
if it is still consistent with the updated IPv6 prefix list.
If not consistent anymore a reconfigure is triggered for the assignment
and a best effort is made to assign a new IA_PD prefix.
If it not possible anymore to assign an IA_PD prefix delete the PD
assignment now so it will result into a NO BINDING status code for the
given IA_PD in the DHCPv6 reply when the client tries to renew the IA_PD prefix.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Replace local mkdir_p implementation in favour of using mkdir_p now
added to libubox.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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Allows sharing leases between odhcpd instances running
in multiple hosts.
Signed-off-by: Santiago Piccinini <spiccinini@altermundi.net>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Adds the config option to set if ipv6 dns service is availiable on the
interface. In some cases the dns service may not be listening on the
ipv6 address of the interface, and thus should not be announced to clients.
Signed-off-by: Paizhuo Chen <cc@icpz.dev>
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Applications (e.g. unbound) need a consistent view of the statefile;
therefore write all the lease info to a temporary file which is later
renamed to the configured statefile name
Suggested-by : John Fremlin <john@fremlin.org>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
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Include the All_DHCP_Relay_Agents_and_Servers multicast address
in the option explicitly. It shouldn't be needed according
to RFC 7341 section 7.2 but ISC dhclient logs an error otherwise:
dhcp4-o-dhcp6-server: expecting at least 16 bytes; got 0
Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
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Add support for DHCPv4-over-DHCPv6 (DHCP 4o6) Transport (RFC 7341).
Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
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The variable maxival contains the maximum time in seconds between
successive unsolicited Router Advertisement messages; RFC6275 defines
the Advertisement Interval option as the time in milliseconds.
Therefore convert maxival to milliseconds when populating the
Advertisement Interval option.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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GCC10 mandates the C++ one definition rule, which breaks on multiple
definitions of config. Add the appropriate extern declaration.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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(FS#3056)
odhcpd includes RIO RA options according to requirement L3 in RFC7084.
However if the delegated prefix length received on the wan is equal to the
downstream delegated prefix length on the Lan this may pollute the
routing table of type C hosts as the RIO routing entry can take
precedence of the PIO routing entry meaning all traffic for the on link
hosts will go via the router iso direct on link communication.
If the traffic is dropped in the router hosts are unreachable; therefore
don't include RIO options with prefixes and prefix length identical to
those in a PIO RA option
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Since commit 6db312a698e920ff61505ef1f42469880829774d the preferred and
valid lifetimes of the addresses/prefixes is based on the configured leasetime;
as a result the displayed preferred and valid lifetimes need to be
calculated based on the assignment lifetime as this is set to the lowest
valid lifetime of the addresses/prefixes.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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SYS_clock_gettime is gone with musl 1.2.0. Switched to the function.
Also fixed two format strings that fail as time_t is 64-bit with 1.2.0.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
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Further align the code to use DHCPv6 assignment flags to distinguish
between prefix delegation and non temporary address assignments
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Don't set the valid lifetime to infinite for static assignments
but rather set it to the IA lifetime given to the client.
This makes it possible to display the leasetime for static assigments
and simplifies the code in several places
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Don't set the valid lifetime to infinite for static assignments
but rather set it to the leasetime given to the client.
This makes it possible to display the leasetime for static assigments
and simplifies the code in several places
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Allow to set the preferred/valid lifetimes of IA_NA/IA_PD options based
on the configured dhcp leasetime.
DHCP leqasetime will be used to set the preferred/valid lifetimes in the
IA_NA/IA_PD options unless the preferred/valid lifetimes of the IPv6
address are smaller then the DHCP leasetime.
This will avoid IA_NA/IA_PD options being sent with infinite lifetimes
due to the IPv6 address having infinite preferred/valid lifetimes
like IPv6 ULA addresses.
While at it rename dhcpv4_leasetime into dhcp_leasetime as the leasetime
is used both for DHCPv4 and DHCPv6
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Simplify the code by using specific flags which identify the assignment
either as a DHCPv6 PD or NA assignment. This allows to remove implicit
checks for PD and NA assignments based on the value of the assignment
length parameter.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Remove prefix delegation routes as well in free_dhcpv6_assignment when
cleaning up the assignment resources
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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As the assignment struct holds a pointer to the interface struct
use this one in apply_lease iso passing interface as a parameter
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Fix endian issue introduced in commit 91a28e4 by using
ND_NA_FLAG_SOLICITED defined in netinet/icmp6.h
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Fix potential infinite loops by checking the return code of
nl_send_auto_complete; if nl_send_auto_complete fails pending
will always have the value 1 as the finish callback will not
be called resulting into an infinite loop
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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An upstream router may address solicits to the global address of the target,
these will not be answered by the kernel and not routed either due to link-local
source. The NS will eventually be retried as multicast, but we want to avoid this.
see also https://forum.archive.openwrt.org/viewtopic.php?id=40871
Signed-off-by: Stefan Alfers <sfan5@live.de>
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Currently only assignments with prefixes larger than the largest
available one will be re-assigned on addrlist change events.
Previously failed PD assignments are not taken into account, and these
assignments will never have a chance to recover even if the address just
added to the interface could satisfy them.
Failed PD assignments could be very common when upstream prefix is obtained
from a PPPoE WAN, as ISPs tend to terminate the PPPoE session after a fixed
time period. Addresses on LAN could disappear and re-appear during WAN redial,
and all existing PD assignments to clients in LAN will become failed when the
addresses disappear. These assignments will not be recovered after WAN has been
brought back up, and clients in LAN could no longer receive any PD prefix.
This commit fixes the issue by including failed PD assignments in the
re-assign list on addrlist change event, so that newly added prefixes can be
put into use right after they are added to the interface.
Signed-off-by: Tian Hao <haotia@gmail.com>
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Keep supporting ra_management for backwards compatibility support;
ra_management will only be processed if neither ra_slaac and ra_flags
are set.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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A pointer to search_buf is accessed by search_domain outside of the
if branch which defines search_buf. The compiler could already reuse
this memory.
Coverity: #1445747
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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In case clid_len is set free assignment when validity timer expires
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Speed up sending initial router advertisement messages as documented in
RFC2461 point 6.2.4
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Make sure the raw socket is removed from the uloop file descriptor
list before the socket is closed as introduced in
https://github.com/openwrt/odhcpd/commit/000182fe4f94a5a6ec139456a2b74f0cdea13b9c
Related to https://github.com/openwrt/odhcpd/issues/135
Signed-off-by: Koen Aerts <aertskoen5@gmail.com>
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After closing the router socket the value needs to be set to -1
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Make sure the socket is closed in a case where the bridge goes down
as a result of NO-CARRIER on the bridge.
If not present Router Discovery and Router Advertisement will break
permanently after the bridge went down.
Related to https://github.com/openwrt/odhcpd/issues/135
Signed-off-by: Koen Aerts <aertskoen5@gmail.com>
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In case setting one of the socket options fails; make sure the raw
socket is removed from the uloop file descriptor list before the
socket is closed.
In case this is not done and a new raw socket is created with the
same fd value odhcpd will not be triggered by uloop in case RS messages
are received on the socket as reported in https://github.com/openwrt/odhcpd/issues/135
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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The value 0 has the special meaning of not being a default router. This
is useful to only advertise prefixes or DNS settings without being a
real router.
Signed-off-by: Jan-Philipp Litza <janphilipp@litza.de>
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Replace the config option ra_management by the config options ra_flags
and ra_slaac. The latter allows to configure the autonomous-address
config flag used for stateless address configuration while the former
allows to configure the RA flags in the form of a list.
The list can hold the following values :
managed-config
other-config
home-agent
none
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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1. Remove 'ignore' config option for interface. Interface is still used if
any of 'ra', 'ndp', 'dhcpv4' or 'dhcpv6' options are different from
default 'disabled' mode. In config_parse_interface() update runtime
ignore value according to all mode values.
2. Reset ignore, ra, ndp, dhcpv4 and dhcpv6 values in set_interface_defaults().
Otherwise if option is deleted from config file and config is reloaded,
it will use the value from old config, potentiallly not turning services off.
3. Do not use implicit checks that 0 server mode means MODE_DISABLED.
4. Simplify code of all service setup functions if passed enabled = true
argument, but service mode is disabled.
Signed-off-by: Dainis Jonitis <dainis.jonitis@ubnt.com>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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When allocating an assignment in alloc_assignment; init the circular head
and lease_list circular lists. Avoids checking NULL pointer when freeing
the assignment in free_assignment.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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As the current assignment is freed in lease_delete use list_for_each_entry_safe
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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