ouroboros/src/lib/frct.c, branch 0.17.2

lib, ipcpd: piggyback ECDHE on flow allocation

2020-02-25T07:21:09Z

The initial implementation for the ECDHE key exchange was doing the key exchange after a flow was established. The public keys are now sent allowg on the flow allocation messages, so that an encrypted tunnel can be created within 1 RTT. The flow allocation steps had to be extended to pass the opaque data ('piggybacking'). Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

build: Update copyright to 2020

2020-01-02T14:07:36Z

Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Add initial rtt estimator to FRCT

2019-02-08T11:39:23Z

This adds a simple round-trip time estimator to FRCT. The estimate is a weighted average with deviation. The retransmission is scheduled after rtt + 2 times the deviation. A retransmit doubles the rtt estimate to avoid the no-update case when rtt suddenly increases. The rtt is estimated in microseconds and the granularity for retransmits is 256 microseconds. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

build: Update copyright to 2019

2019-02-05T08:58:08Z

Updates the copyright notice in all sources to 2019. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Add First Fragment (FFGM) bit to FRCT

2018-11-21T08:14:18Z

This adds a First Fragment bit to FRCT. This small optimisation avoids losing two packets when there is packet loss without fragmentation, without the need to disable fragmentation at the end points. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Remove CRC flag from FRCT

2018-10-15T11:30:56Z

The integrity check mechanism was split from FRCT, this flag is not needed anymore. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Some more fixes in retransmission

2018-10-10T07:08:34Z

The queued packets were not correctly read. The rcv_cr->seqno now indicates the next packet the receiver application expects. A lot more stable now, but still some further issues to be fixed. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

lib: Fix initial automated repeat-request

2018-10-09T11:04:09Z

This fixes rudimentary automated repeat-request ARQ to correctly configure the both connection records and use the receiver seqno. The rto variable is moved out of the connection record. Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders

Merge branch 'testing' into be

2018-10-06T16:06:47Z

lib: Keep track of highest delivered seqno

2018-10-06T15:43:19Z

The FRCT kept only a left window edge in the receiver connection window, however, it needs to keep track of the left window edge (highest ACK'd sequence number) and the highest delivered sequence number, so it can delay ACKs that cannot be piggybacked. TCP recommends at most 500 ms for delayed ACKs (probably good to keep it near half of RTO). Signed-off-by: Dimitri Staessens Signed-off-by: Sander Vrijders