When querying SAs the keys will end up in this buffer (the allocated
messages that are returned are already wiped). The kernel also returns
XFRM_MSG_NEWSA as response to XFRM_MSG_ALLOCSPI but we can't distinguish
this here as we only see the response.
References #2388.
When requiring unique flags for CHILD_SAs, allow the configuration to
request different marks for each direction by using the %unique-dir keyword.
This is useful when different marks are desired for each direction but the
number of peers is not predefined.
An example use case is when implementing a site-to-site route-based VPN
without VTI devices.
A use of 0.0.0.0/0 - 0.0.0.0/0 traffic selectors with identical in/out marks
results in outbound traffic being wrongfully matched against the 'fwd'
policy - for which the underlay 'template' does not match - and dropped.
Using different marks for each direction avoids this issue as the 'fwd' policy
uses the 'in' mark will not match outbound traffic.
Closesstrongswan/strongswan#78.
Initiation might later fail, of course, but we don't really
require an IP address when installing, that is, unless the remote
traffic selector is dynamic. As that would result in installing a
0.0.0.0/0 remote TS which is not ideal when a single IP is expected as
remote.
After a rekeying the outbound SA and policy is deleted immediately, however,
the inbound SA is not removed until a few seconds later, so delayed packets
can still be processed.
This adds a flag to get_esa_id() that specifies the location of the
given SPI.
This splits the SA installation also on the initiator, so we can avoid
installing the outbound SA if we lost a rekey collision, which might
have caused traffic loss depending on the timing of the DELETEs that are
sent in both directions.
This tries to avoid packet loss during rekeying by delaying the usage of
the new outbound IKE_SA until the old one is deleted.
Note that esa_select() is a no-op in the current TKM implementation. And
the implementation also doesn't benefit from the delayed deletion of the
inbound SA as it calls esa_reset() when the outbound SA is deleted.
If multiple threads want to enumerate child-cfgs and potentially lock
other locks (e.g. check out IKE_SAs) while doing so a deadlock could
be caused (as was the case with VICI configs with start_action=start).
It should also improve performance for roadwarrior connections and lots
of clients connecting concurrently.
Fixes#2374.
This prevented new listeners from receiving notifies if they joined
after another listener disconnected previously, and if they themselves
disconnected their old connection would prevent them again from getting
notifies.
Multiple CHILD_SAs sharing the same traffic selectors (e.g. during
make-before-break reauthentication) also have the same reqid assigned.
If all matching entries are removed we could end up without entry even
though an SA exists that still uses these traffic selectors.
Fixes#2373.
This way we get the log message in stroke and swanctl as last message
when establishing a connection. It's already like this for the IKE_SA
where IKE_ESTABLISHED is set after the corresponding log message.
Fixes#2364.
Andreas Steffen