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* kernel-netlink: Copy current usage stats to new SA in update_sa()Tobias Brunner2015-03-251-6/+34
| | | | | | | | | | | | This is needed to fix usage stats sent via RADIUS Accounting if clients use MOBIKE or e.g. the kernel notifies us about a changed NAT mapping. The upper layers won't expect the stats to get reset if only the IPs have changed (and some kernel interface might actually allow such updates without reset). It also fixes traffic based lifetimes in such situations. Fixes #799.
* kernel-interface: Add a separate "update" flag to add_sa()Martin Willi2015-03-095-12/+14
| | | | | | | | | | | The current "inbound" flag is used for two purposes: To define the actual direction of the SA, but also to determine the operation used for SA installation. If an SPI has been allocated, an update operation is required instead of an add. While the inbound flag normally defines the kind of operation required, this is not necessarily true in all cases. On the HA passive node, we install inbound SAs without prior SPI allocation.
* kernel-pfkey: Add option to set receive buffer size of event socketTobias Brunner2015-03-061-0/+13
| | | | | | | | 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.
* kernel-netlink: Respect kernel routing priorities for IKE routesMartin Willi2015-03-031-2/+15
| | | | | | | | If a system uses routing metrics, we should honor them when doing (manual) routing lookups for IKE. When enumerating routes, the kernel reports priorities with the RTA_PRIORITY attribute, not RTA_METRICS. We prefer routes with a lower priority value, and fall back to longest prefix match priorities if the priority value is equal.
* attributes: Move the configuration attributes framework to libcharonMartin Willi2015-02-2015-1944/+0
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* attr-sql: Move plugin to libcharonMartin Willi2015-02-206-721/+0
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* attr: Move plugin to libcharonMartin Willi2015-02-207-562/+0
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* resolve: Move plugin back to libcharonMartin Willi2015-02-206-596/+0
| | | | Since pluto is gone, all existing users build upon libcharon.
* kernel-interface: Raise mapping event with a proto/SPI/dst tupleMartin Willi2015-02-205-25/+38
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* kernel-interface: Raise expires with a proto/SPI/dst tuple instead of reqidMartin Willi2015-02-205-27/+30
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* child-sa: Replace reqid based marks by "unique" marksMartin Willi2015-02-202-61/+14
| | | | | | | | | | | As we now use the same reqid for multiple CHILD_SAs with the same selectors, having marks based on the reqid makes not that much sense anymore. Instead we use unique marks that use a custom identifier. This identifier is reused during rekeying, keeping the marks constant for any rule relying on it (for example installed by updown). This also simplifies handling of reqid allocation, as we do not have to query the marks that is not yet assigned for an unknown reqid.
* kernel-interface: Add reqid allocation and release functionsMartin Willi2015-02-202-1/+329
| | | | | | | | | To reassign reqids where appropriate, we explicitly allocate or confirm them centrally on the kernel-interface. Currently the state is stored in the kernel-interface wrapper for all backends, but we may add appropriate methods to each backend to implement a custom reqid allocation logic, if required.
* kernel-interface: Pass full list of traffic selectors to add_sa()Martin Willi2015-02-205-21/+17
| | | | | | While we can handle the first selector only in BEET mode in kernel-netlink, passing the full list gives the backend more flexibility how to handle this information.
* kernel-pfkey: Don't update during add_sa(), but delete SPI allocation stateMartin Willi2015-02-201-7/+18
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* kernel-interface: Remove reqid parameter from get_spi/get_cpi() methodsMartin Willi2015-02-205-43/+31
| | | | | | | | | | The reqid is not strictly required, as we set the reqid with the update call when installing the negotiated SA. If we don't need a reqid at this stage, we can later allocate the reqid in the kernel backend once the SA parameters have been fully negotaited. This allows us to assign the same reqid for the same selectors to avoid conflicts on backends this is necessary.
* kernel-pfroute: If a new interface appears, slightly delay address enumerationMartin Willi2014-12-161-0/+9
| | | | | | | On OS X 10.10, when installing a virtual IP on a tun device, there is a chance that a RTM_IFANNOUNCE is sent before the IP is ready on that link when calling getifaddrs(). As we don't get an RTM_NEWADDR event either, that race lets us miss the virtual IP install event, failing the add_ip() call.
* Fixed some typos, courtesy of codespellTobias Brunner2014-12-151-1/+1
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* kernel-pfkey: Fix replay window size on FreeBSD and Mac OS XTobias Brunner2014-12-151-0/+6
| | | | | | | | | The FreeBSD and Mac OS X kernels interpret sadb_sa_replay as the size of the replay window in bytes. Linux on the other hand does the same for PF_KEY it does for XFRM so sadb_sa_replay denotes the number of packets/bits in the window. Similarly, the window size on Linux is limited to 32 by the four byte default bitmap used for IPsec SAs (may only be changed with XFRMA_REPLAY_ESN_VAL), which is not the case on the other platforms.
* kernel-netlink: Optionally ignore errors resulting from response message lossMartin Willi2014-11-211-0/+82
| | | | | | | | | | | | | | | As some backends over unreliable transport do not cache response messages, retransmissions due the loss of responses perform the operation again. Add an option to ignore some errors arising from such duplicate operations. Note: This approach can't distinguish between real EXIST/NOTFOUND errors and packet failures, and therefore is a source of race conditions and can't detect any of these errors actually happening. Therefore that behavior is disabled by default, and can be enabled with the ignore_retransmit_errors strongswan.conf option. To properly distinguish between real and retransmission errors, a Netlink backend should implement retransmission detection using sequence numbers.
* kernel-netlink: Add an option to enforce using XFRM_MSG_UPDPOLICYMartin Willi2014-11-211-0/+12
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* kernel-netlink: Fallback to UDP if detecting socket protocol failsMartin Willi2014-11-211-2/+4
| | | | | getsockopt(SO_PROTOCOL) is not supported before 2.6.32. Default to UDP if either the SO_PROTOCOL define is missing or the syscall fails.
* kernel-netlink: Alternatively support global port based IKE bypass policiesMartin Willi2014-11-211-3/+160
| | | | | | 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.
* kernel-netlink: Add options to enable parallel Netlink queries explicitlyMartin Willi2014-11-215-20/+39
| | | | | | As under vanilla Linux the kernel can't handle parallel dump queries and returns EBUSY, it makes not much sense to use them. Disable parallel queries by default to basically restore original behavior, improving performance.
* kernel-netlink: Release lock while doing Netlink NEW/DELADDR operationsMartin Willi2014-11-211-8/+17
| | | | | | | | Besides that it can improve throughput, it avoids a deadlock situation. If all threads are busy, watcher will invoke the FD notification for NEWADDR events itself. If the lock is held, it gets locked up. As watcher is not dispatching anymore, it can't signal Netlink socket send() completion, and the send() operation does not return and keeps the lock.
* kernel-netlink: Add non-dumping variants of echo and stress testsMartin Willi2014-11-211-0/+84
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* kernel-netlink: Add test cases for successful and timing out retransmissionsMartin Willi2014-11-212-0/+90
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* kernel-netlink: Add a compile-time hook to simulate request message lossMartin Willi2014-11-211-0/+15
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* kernel-netlink: Implement configurable Netlink request retransmissionMartin Willi2014-11-211-15/+86
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* kernel-netlink: Add a stress test with several threads doing Netlink exchangesMartin Willi2014-11-211-0/+62
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* kernel-netlink: Retry netlink query while kernel returns EBUSYMartin Willi2014-11-211-3/+37
| | | | | | If the kernel can't execute a Netlink query because a different query is already active, it returns EBUSY. As this can happen now as we support parallel queries, retry on this error condition.
* kernel-netlink: Support parallel Netlink queriesMartin Willi2014-11-211-74/+192
| | | | | | | | | | | | | | | | | | Instead of locking the socket exclusively to wait for replies, use watcher to wait for and read in responses asynchronously. This allows multiple parallel Netlink queries, which can significantly improve performance if the kernel Netlink layer has longer latencies and supports parallel queries. For vanilla Linux, parallel queries don't make much sense, as it usually returns EBUSY for the relevant dump requests. This requires a retry, and in the end makes queries more expensive under high load. Instead of checking the Netlink message sequence number to detect multi-part messages, this code now relies on the NLM_F_MULTI flag to detect them. This has previously been avoided (by 1d51abb7). It is unclear if the flag did not work correctly on very old Linux kernels, or if the flag was not used appropriately by strongSwan. The flag seems to work just fine back to 2.6.18, which is a kernel still in use by RedHat/CentOS 5.
* kernel-netlink: Add a simple send message test querying available linksMartin Willi2014-11-213-0/+70
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* kernel-netlink: Add a stub for a test-runnerMartin Willi2014-11-214-0/+85
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* mem-pool: Fix potential memory leak and lost leases when reassigning leasesTobias Brunner2014-11-111-2/+6
| | | | | | | | | | | | | | | | If no offline leases are available for the current client and assigning online leases is disabled, and if all IPs of the pool have already been assigned to clients we look for offline leases that previously were assigned to other clients. In case the current client has online leases the previous code would replace the existing mapping entry and besides resulting in a memory leak the online leases would be lost forever (even if the client later releases the addresses). If this happens repeatedly the number of available addresses would decrease even though the total number of online and offline leases seen in `ipsec leases` would indicate that there are free addresses available. Fixes #764.
* mem-pool: Add basic unit testsTobias Brunner2014-10-303-0/+233
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* libhydra: Add test runnerTobias Brunner2014-10-305-0/+91
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* mem-pool: Correctly ignore first and last addresses of subnets and adjust sizeTobias Brunner2014-10-301-7/+49
| | | | | | | Previously one more than the first and last address was ignored. And if the base address is not the network ID of the subnet we should not skip it. But we should adjust the size as it does not represent the actual number of IP addresses assignable.
* kernel-pfroute: Check for RTM_IFANNOUNCE availabilityMartin Willi2014-10-141-0/+10
| | | | This message is not available on OS X.
* kernel-netlink: Define and use rtnetlink message typesMartin Willi2014-09-241-1/+22
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* kernel-netlink: Pass protocol specific enum names to socket constructorMartin Willi2014-09-244-12/+13
| | | | | This avoid the hard dependency on enum names, and makes kernel_netlink_shared independent of kernel_netlink_ipsec.
* kernel-netlink: Clean up socket initialization, handle 0 as valid socket fdMartin Willi2014-09-241-9/+6
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* kernel-netlink: Clean up response buffer managementMartin Willi2014-09-241-24/+16
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* kernel-netlink: Use recv() instead of recvfrom()Martin Willi2014-09-241-11/+3
| | | | | As we are not interested in the returned address, there is really no need in passing that argument.
* kernel-netlink: Avoid casting the NLMSG_DATA() return valueMartin Willi2014-09-243-26/+26
| | | | There is really no need for doing so, and it makes the code just unreadable.
* kernel-netlink: Define netlink buffer as an union having a netlink headerMartin Willi2014-09-243-20/+23
| | | | | This allows us to streamline the netlink buffers, and avoid extensive casting.
* settings: Use strongswan.conf used during library initialization for reloadMartin Willi2014-09-221-2/+1
| | | | | | | | Since 4b670a20 we require an explicit strongswan.conf to re-load configurations. However, the define was missing in the build, breaking SIGHUP based config reloading. Fixes #651.
* kernel-netlink: Optionally install protocol and ports on transport mode SAsTobias Brunner2014-09-121-6/+18
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* kernel-netlink: Add global option to configure MSS-clamping on installed routesTobias Brunner2014-09-121-6/+26
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* kernel-netlink: Add global option to set MTU on installed routesTobias Brunner2014-09-121-0/+19
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* kernel-pfroute: Delete interfaces on RTM_IFANNOUNCE/IFAN_DEPARTURE eventsTobias Brunner2014-09-091-0/+38
| | | | | | | | | | | | We actually never deleted cached interfaces. So if the kernel reuses interface indices events for newly created interfaces could have been associated with interface objects of deactivated and deleted interfaces. Since we also didn't update the interface name when such an interface got reactivated we ended up using the old name e.g. to install routes. A trigger for this was the deletion and recreation of TUN devices during reauthentication of SAs that use virtual IPs.
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