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Whe doing an assignment lookup do a strict match between the assignment
IAID and the IAID received form the client in case the BOUND or TENTATIVE
assignment flags are set.
This fixes a wrong assignment being returned for a client which uses a
different IAID than the IAID used in a previous DHCPv6 exchange.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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IETF is moving toward implementing IPv6 multihoming by sending
multiple RAs on a single interface:
- draft-ietf-intarea-provisioning-domains-00
- draft-ietf-rtgwg-enterprise-pa-multihoming-02
odhcpd supports configuration of multiple software interfaces
on the same physical interface, which already advertises
multiple RAs, but had two issues:
- Each RA includes all the prefixes available on the interface.
- Replies to sollicits with a single RA.
This patch introduces the prefix_filter configuration parameter
which allows filtering prefixes that are sent in a given RA,
and fixes the sollicit code in order to reply with all the RAs
that are configured on a given interface.
Signed-off-by: Pierre Pfister <ppfister@cisco.com>
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If the ubus object has any subscription notify DHCP ACK and DHCP RELEASE
events using ubus notifications.
Signed-off-by: Borja Salazar <borja.salazar@fon.com>
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Make DHCPv4 support compile time configurable; avoids DHCPv4 functionality
overlap with other packages.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Rework the handling of netlink events by letting the different
modules ndp, ra, dhcpv6 and dhcpv4 install netevent handlers.
The installed netevent handlers are called by the netlink logic
passing an event indication together with event data.
Each netevent handler implements its own event logic; this
makes the code more modular and less complex by moving all
netlink code to netlink.c
While at it rename ia_addr and ia_addr_len into addr6 and
addr6_len respectively
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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First step in moving netlink code to netlink.c by
moving netlink code from odhcpd.c to netlink.c
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Support force renew nonce authentication support in the DHCPv4 server as
described in RFC3203 and RFC6704.
The interface uci arameter dhcpv4_forcereconf allows to supports DHCPv4
clients which support force renew without authentication.
While at it align network byte order logic for simplicity.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Remove the unfortunate RELAYD naming in the different macros
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Align IPv4 address logic with IPv6 by caching per interface the assigned
IPv4 addresses. This allows to get rid of different ioctl calls in the
DHCPv4 logic to retrieve the IPv4 address and netmask in use by an
interface.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Some client implementations expect DHCPv6 addresses to be assigned for
every prefix present in a RA as reported in FS#524; if not done the
client implementations spam the DHCPv6 server with SOLICIT messages
trying to get an DHCPv6 address for every prefix.
When ra_managed is set to 1 and an ULA prefix is configured; the DHCPv6
server will only assign an ULA DHCPv6 addresses which possibly leads to
DNS issues.
Fix these problems by providing dhcpv6_assignall config option which
assigns all viable DHCPv6 addresses to a client by default.
This is a trade off as it means client implementations will be assigned
more IPv6 addresses and lose the ability to quickly renumber clients
which don't support reconfigure accept in case of wan prefix change
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Improve code readability by renaming managed into ra_managed and
define the according ra_managed flags.
This will help to better understand the ra_managed logic as defined
in the README file.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Retrieve IPv6 interface addresses when the interface gets created; this
allows to get rid of the IPv6 address dump logic in ndp.c.
Add IPv4 address support in odhcp_ipaddr struct.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Rework code to get rid of RELAYD_MAX_PREFIXES and RELAYD_MAX_ADDRS
by using dynamic IPv6 address array allocation.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Get rid of IFNAMSIZE usage for interface name and ifname variables
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Use integer type for mtu variable as odhcpd_get_interface_config returns
-1 when it fails to read the interface mtu. This allows to set the mtu
to a meaningfull value of 1280 in case of interface mtu read failure.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Allow to specify the router advertisement retrans time via the uci
parameter ra_retranstime. If retransmit time is not configured the
value is set to 0 in RA message meaning undefined.
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Allow to specify the router advertisement reachable time via the uci
parameter ra_reachabletime. If reachable time is not configured the
value is set to 0 in RA message meaning undefined.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Allow to specify the router advertisement current hop limit via the uci
parameter ra_hoplimit. If hoplimit is not configured the hoplimit is
taken from the interface as before.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Allow to specify the router advertisement mtu via the uci parameter
ra_mtu. In case the config parameter is not set the MTU is taken from
the interface as before.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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In case maindhcp is set to disabled in global config one expect the DHCPv4
server not being started irrespective if the dhcpv4 interface config is set
to server.
Fix this by keeping maindhcp config apart from the legacy config parameter
as already documented in the README.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Don't return anymore the link local IPv6 address as DNS IPv6 address
since different OS implementations (e.g. android, ...) cannot handle
a link local IPv6 address as DNS address.
IPv6 DNS address selection is reworked as follows :
-Consider all global/ULA IPv6 address having a valid lifetime
-Give preference to global/ULA IPv6 addresses being not deprecated
-Give preference to ULA IPv6 addresses over IPv6 global addresses
-Give preference to the IPv6 address with the longest preferred lifetime in
its selected category (ULA or global)
-If no global/ULA IPv6 address is present use the IPv6 link local address
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Make the code more logical by moving the IPv6 address dump logic into the
different protocol interface enable handlers so it's clear which protocols
require interface IPv6 address tracking.
At the same time restructure the IPv6 address dump logic so less IPv6 address
netlink dumps are created.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Add config option ra_useleasetime which allows the RA prefix lifetime
being set to the leasetime in case the valid and/or preferred prefix
lifetime is bigger than the configured leasetime.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Add support for uci parameters ra_mininterval and ra_lifetime as described
in RFC4861 paragraph 6.2.1.
Variable ra_mininterval allows to configure the minimum interval time
between unsolicited router advertisement messages; default value is
200 seconds. The minimum allowed value is 4 seconds while the maximum
value is limited to 0.75 of the maximum interval time.
The calculation of the maximum interval time between unsolicited
router advertisement messages has been reworked. The default value is 600
seconds as specified in RFC4861; if the maximum interval time exceeds
0.33 * the minimal valid lifetime of all IPv6 prefixes it will be limited
to 0.33 * the minimal valid lifetime of all IPv6 prefixes
Variable ra_lifetime allows to configure the Router Lifetime field
in the router advertisement messages; the value is either 0 or a value
between the maximum interval time and 9000 seconds. If the router lifetime
is smaller than the RA maximum interval it will be set equal to the RA
maximum interval time.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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This reverts commit 62ea54f5db4c636710781056541c4b85d043bef8.
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Deregister netlink event socket in case of error different
from ENOBUFS or failure to set netlink rx buffer size
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Start with a netlink receive buffersize of 130k for the netlink event socket;
double the netlink receive buffer size in case an ENOBUFS is reported.
Also align function naming and its parameters.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Rework the IPv6 relay logic to make it more robust by making
use of libnltiny to process netlink messages.
At the same time reimplement the IPv6 relay finite state machine
to make the relay logic less error prone
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Use libnl-tiny to construct and process netlink messages when
manipulating IPv6 routes and fetching IPv6 addresses.
This fixes lingering netlink error messages on the netlink socket
in case route deletion failed causing fetching of IPv6 addresses
to be aborted and odhcpd faultly assuming no IPv6 addresses being
present on the interface.
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ia_reconf is only set but nowhere used; so let's remove it ...
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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In case infinite leasetime is assigned to a non static DHCPv4/v6 lease
override the infinite lifetime of the lease when either a DHCPv4/v6
decline or release is received.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Set bound flag for DHCPv4 and DHCPv6 assignments when the IPv6/IPv4 address
is leased to a client.
This will prevent the printing of leases and hostname/IPv4/IPv6 address
combinations in the state file for for which the IPv4/6 address has not
been assigned.
Also this will fix the printing of assignments which have been declined
by the clients
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Add support for infinite leasetime value; this can be done by
specifying "infinite" as leasetime value which is similar to
dnsmasq infinite leasetime support.
Specifying "infinite" as leasetime is valid for both the host
and dhcp uci sections.
A DHCPv4/DHCPv6 assignment is now considered infinite if valid_unil
holds the value 0.
Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
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Patch by Daniel Dickinson
Signed-off-by: Steven Barth <steven@midlink.org>
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RFC: dhcpv4 support openwrt alias ip addr
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Signed-off-by: Patrick Grimm <patrick@lunatiki.de>
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Signed-off-by: Patrick Grimm <patrick@lunatiki.de>
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Signed-off-by: Patrick Grimm <patrick@lunatiki.de>
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