Some clients won't do Mode Config or XAuth during reauthentication.
Because Start messages previously were triggered by TRANSACTION exchanges
none were sent for new SAs of such clients, while Stop messages were still
sent for the old SAs when they were destroyed. This resulted in an
incorrect state on the RADIUS server.
Since 31be582399 the assign_vips() event is also triggered during
reauthentication if the client does not do a Mode Config exchange.
So instead of waiting for a TRANSACTION exchange we trigger the Start
message when a virtual IP is assigned to a client.
With this the charon.plugins.eap-radius.accounting_requires_vip option
would not have any effect for IKEv1 anymore. However, it previously also
only worked if the client did an XAuth exchange, which is probably
rarely used without virtual IPs, so this might not be much of a
regression.
Fixes#937.
The kernel uses NLMSG_GOODSIZE as default buffer size, which defaults to
the PAGE_SIZE if it is lower than 8192 or to that value otherwise.
In some cases (e.g. for dump messages) the kernel might use up to 16k
for messages, which might require increasing this value.
The specific traffic selectors from the acquire events, which are derived
from the triggering packet, are usually prepended to those from the
config. Some implementations might not be able to handle these properly.
References #860.
If many requests are sent to the kernel the events generated by these
requests may fill the receive buffer before the daemon is able to read
these messages.
Fixes#783.
If this is disabled the schemes configured in `rightauth` are only
checked against signature schemes used in the certificate chain and
signature schemes used during IKEv2 are ignored.
Disabling this could be helpful if existing connections with peers that
don't support RFC 7427 use signature schemes in `rightauth` to verify
certificate chains.
With make-before-break IKEv2 re-authentication, virtual IP addresses must be
assigned overlapping to the same peer. With the remote IKE address, the backend
can detect re-authentication attempts by comparing the remote host address and
port. This allows proper reassignment of the virtual IP if it is re-requested.
This change removes the mem-pool.reassign_online option, as it is obsolete now.
IPs get automatically reassigned if a peer re-requests the same address, and
additionally connects from the same address and port.
The socket based IKE bypass policies are usually superior, but not supported
on all networking stacks. The port based variant uses global policies for the
UDP ports we have IKE sockets for.
Any interval returned by the RADIUS server in the Access-Accept message
overrides the configured interval. But it might be useful if RADIUS is
only used for accounting.
Instead of using the first address we find on an interface we should
consider properties like an address' scope or whether it is temporary
or public.
Fixes#543.
__cmp__() is not supported anymore with Python 3 and cmp() is deprecated.
Instead rich comparisons should be used (only __lt__() is required for
sorting).
Even in Main Mode, some Sonicwall boxes seem to send ID/HASH payloads in
unencrypted form, probably to allow PSK lookup based on the ID payloads. We
by default reject that, but accept it if the
charon.accept_unencrypted_mainmode_messages option is set in strongswan.conf.
Initial patch courtesy of Paul Stewart.
