This should prevent the kernel's IPv6 source address selection algorithm
from using this address unless it is forced to by our source route.
This is helpful if split tunneling is used.
Fixes#598.
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.
Trying to disable replay windows using the ESN attribute fails with EINVAL.
Use non-ESN legacy format to disable replay windows, even if ESN has been
negotiated over IKE.
On some systems (e.g. on Debian/kFreeBSD) that header is required when
including ipsec.h, on Linux we require it too when including pfkeyv2.h,
so to simplify things we just always include it.
- get_cpi function was implemented to retrieve a CPI from the kernel.
- add_sa/update_sa/del_sa were updated to accommodate for IPComp SA.
- Updated add_policy_internal to update the SPD to support IPComp.
This is undefined behavior as per the C99 standard (sentence 1185):
"If the value of the right operand is negative or is greater or equal
to the width of the promoted left operand, the behavior is undefined."
Apparently shifts may be done modulo the width on some platforms so
a shift by 32 would not shift at all.
Don't add a selector to tunnel mode SAs, these might serve multiple
traffic selectors but with only one selector on the SA only the traffic
matching the first one would actually get tunneled.
If the same identity is added concurrently by two threads (or by the
pool utility) INSERT might fail even though the SELECT was unsuccessful
before.
We are currently not able to lock the identities table in a portable way
(something like SELECT ... FOR UPDATE on MySQL).
There could, of course, be race conditions when enumerating the attributes,
but those probably don't matter (e.g. missing an attribute that was
concurrently added).
Transactions are more intended to revert multiple changes if anything
fails in the process.
When using auto=route, current xfrm_acq_expires default value
implies that tunnel can be down for up to 165 seconds, if
other peer rejected first IKE request with an AUTH_FAILED or
NO_PROPOSAL_CHOSEN error message. These error messages are
completely normal in setups where another application
pushes configuration to both strongSwans without waiting
for acknowledgment that they have updated their configurations.
This patch allows strongswan to override xfrm_acq_expires default
value by setting charon.plugins.kernel-netlink.xfrm_acq_expires in
strongswan.conf.
Signed-off-by: Ansis Atteka <[email protected]>
Since comments in resolv.conf are only valid at the beginning of a line
resolvconf(8) seems to have started treating any text after
'nameserver <ip>' as additional IP addresses for name servers.
Since it ignores comments, and we can easily remove the added servers
again, there is no point to add any.
Fixes#410.
The flag is required to convince libtool on Cygwin to build DLLs. But on
Windows these shared libraries can not have undefined symbols, so we have to
link them explicitly to the libraries they reference.
For plugins this is currently not done, so only the monolithic build is
supported. The plugin loader wouldn't be able to load DLLs anyway, as
it tries to load files that don't exist on Cygwin.
Commit 940e1b0f66 "Filter ignored
interfaces in kernel interfaces (for events, address enumeration,
etc.)" made charon to ignore routes with unusable interfaces.
Unusable interface is one where charon has not seen RTM_NEWLINK
message from the kernel.
Sometime RTM_NEWLINK message can be 1048 bytes large. This is
24 bytes more than currently allocated buffer of 1024 bytes.
If kernel sends such a large message, then it would be silently
ignored by charon and corresponding interface would never become
usable. Hence strongSwan might resolve invalid source IP address
in get_route() function. This would prevent IPsec tunnel to be
established.
To reproduce create a VLAN interface with following command:
vconfig add eth1 12
The retry code introduced in dc8b083 got the memset() arguments wrong.
Fix this to ensure the buffer gets zeroed, for real.
It probably doesn't matter as we do reset the message length on retry, so
the stale data shouldn't be seen by anyone.
Found-by: git grep 'memset\s*\([^,]*,\s*[^,]*,\s*0\s*\)'
Since f52cf07532 addresses on ignored, down or loopback interfaces were
not considered as valid addresses anymore when searching for an address
contained in the local traffic selector. This meant that route
installation failed, for instance, if charon.install_virtual_ip_on was
set to 'lo', or, on gateways, if internal interfaces were ignored with
the charon.interfaces_* options.
Tobias Brunner