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2017-12-09global: add SPDX tags to all filesGreg Kroah-Hartman
It's good to have SPDX identifiers in all files as the Linux kernel developers are working to add these identifiers to all files. Update all files with the correct SPDX license identifier based on the license text of the project or based on the license in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Modified-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-31global: style nitsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-31global: infuriating kernel iterator styleJason A. Donenfeld
One types: for (i = 0 ... So one should also type: for_each_obj (obj ... But the upstream kernel style guidelines are insane, and so we must instead do: for_each_obj(obj ... Ugly, but one must choose his battles wisely. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-31global: accept decent check_patch.pl suggestionsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-31stats: more robust accountingJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-17send: improve dead packet control flowJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-11send: do not requeue if packet is deadJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-05queueing: cleanup skb_paddingJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-05queueing: move from ctx to cbJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-05queueing: use ptr_ring instead of linked listsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-05send: put keypair referenceJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-10-03global: add space around variable declarationsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-09-19queueing: rename cpumask functionJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-09-19send: don't take uninitialized lockJason A. Donenfeld
Packets is a local, which means we need to use the functions that don't take a spinlock, since otherwise we'll be using a spinlock in an undefined state. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-09-19queueing: no need to memzero structJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-09-18queue: entirely rework parallel systemJason A. Donenfeld
This removes our dependency on padata and moves to a different mode of multiprocessing that is more efficient. This began as Samuel Holland's GSoC project and was gradually reworked/redesigned/rebased into this present commit, which is a combination of his initial contribution and my subsequent rewriting and redesigning. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-09-16send: no need to check for NULL since ref is validJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-08-04noise: infer initiator or not from handshake stateJason A. Donenfeld
Suggested-by: Mathias Hall-Andersen <mathias@hall-andersen.dk> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-08-04timers: rename confusingly named functions and variablesJason A. Donenfeld
Suggested-by: Mathias Hall-Andersen <mathias@hall-andersen.dk> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-07-20send: use skb_queue_empty where appropriateSamuel Holland
Signed-off-by: Samuel Holland <samuel@sholland.org> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-07-20global: use pointer to net_deviceJason A. Donenfeld
DaveM prefers it to be this way per [1]. [1] http://www.spinics.net/lists/netdev/msg443992.html Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-07-20send: orphan skbs when buffering longtermJason A. Donenfeld
Otherwise we quickly use up all of a socket's memory, which prevents a socket from sending packets to other interfaces. This also has the nice effect of letting TCP connections continue to attempt to begin, with the older ones being naturally rotated out and freed, so when a connection finally is made, only the later TCP connections are attempted, not the ones that would already have timed out. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-05-31timers: reset retry-attempt counter when not retryingJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-05-31debug: print interface name in dmesgJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-05-30style: spaces after for loopsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-05-30handshake: process in parallelJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-04-08data: cleanup parallel workqueue and use two max_activeJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-04-04data: simplify flowJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-04-04locking: always use _bhJason A. Donenfeld
All locks are potentially between user context and softirq, which means we need to take the _bh variant. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-03-20data: big refactoringJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2017-01-10Update copyrightJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-12-13peer: don't use sockaddr_storage to reduce memory usageJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-12-11device: clean up xmit error pathJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-29send: send packet initiation only after requeuing to prevent raceJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-21headers: cleanup noticesJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-15debug: cleanup skb printingJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-15socket: keep track of src address in sending packetsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-07send: simplify handshake initiation queueing and introduce lockJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-06debug: support dynamic debug on skb addrJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-06send: remove redundant time stampJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-05socket: big refactoringJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-04send: queue bundles on same CPUJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-11-03timers: take reference like a lookup tableJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-10-19timers: only have initiator rekeyJason A. Donenfeld
If it's time to rekey, and the responder sends a message, the initator will begin the rekeying when sending his response message. In the worst case, this response message will actually just be the keepalive. This generally works well, with the one edge case of the message arriving less than 10 seconds before key expiration, in which the keepalive is not sufficient. In this case, we simply rehandshake immediately. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-10-19timers: always delay handshakes for responderJason A. Donenfeld
With the prior behavior, when sending a packet, we checked to see if it was about time to start a new handshake, and if we were past a certain time, we started it. For the responder, we made that time a bit further in the future than for the initiator, to prevent the thundering herd problem of them both starting at the same time. However, this was flawed. If both parties stopped communicating after 2.2 minutes, and then one party decided to initiate a TCP connection before the 3 minute mark, the currently open session would be used. However, because it was after the 2.2 minute mark, both peers would try to initiate a handshake upon sending their first packet. The errant flow was as follows: 1. Peer A sends SYN. 2. Peer A sees that his key is getting old and initiates new handshake. 3. Peer B receives SYN and sends ACK. 4. Peer B sees that his key is getting old and initiates new handshake. Since these events happened after the 2.2 minute mark, there's no delay between handshake initiations, and problems begin. The new behavior is changed to: 1. Peer A sends SYN. 2. Peer A sees that his key is getting old and initiates new handshake. 3. Peer B receives SYN and sends ACK. 4. Peer B sees that his key is getting old and schedules a delayed handshake for 12.5 seconds in the future. 5. Peer B receives handshake initiation and cancels scheduled handshake. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-10-19debug: keep alive -> keepaliveJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-10-14send: ensure that rekey retries are staggeredJason A. Donenfeld
Before: t+120: A sends rekey [packet dropped by network congestion] t+125: A sends rekey [packet dropped by network congestion] t+130: A sends rekey t+130: B sends rekey ! race ! After: t+120: A sends rekey [packet dropped by network congestion] t+125: A sends rekey [packet dropped by network congestion] t+130: A sends rekey [packet dropped by network congestion] T+132.5: B sends rekey [packet dropped by network congestion] T+135: A sends rekey [packet dropped by network congestion] T+137.5: B sends rekey ! success, eventually ! Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-10-05send: requeue jobs for later if padata is fullJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-09-29Rework headers and includesJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2016-08-29send: properly encapsulate ECNJason A. Donenfeld
We're not leaking the DSCP, but we do deal with ECN. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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