This patchset implements "Additional Policies for the Partially Reliable
Stream Control Transmission Protocol Extension" described on RFC7496.
The Partially Reliable SCTP (PR-SCTP) extension defined in [RFC3758]
provides a generic method for senders to abandon user messages. The
decision to abandon a user message is sender side only, and the exact
condition is called a "PR-SCTP policy". This patchset implements 3
policies:
1. Timed Reliability: This allows the sender to specify a timeout for
a user message after which the SCTP stack abandons the user message.
2. Limited Retransmission Policy: Allows limitation of the number of
retransmissions.
3. Priority Policy: Allows removal of lower-priority messages if space
for higher-priority messages is needed in the send buffer.
Patch 1-3 add some sockopts in sctp to set/get pr_sctp policy status.
Patch 4-6 implement these 3 policies one by one.
Xin Long (6):
sctp: add SCTP_PR_SUPPORTED on sctp sockopt
sctp: add SCTP_DEFAULT_PRINFO into sctp sockopt
sctp: add SCTP_PR_ASSOC_STATUS on sctp sockopt
sctp: implement prsctp TTL policy
sctp: implement prsctp RTX policy
sctp: implement prsctp PRIO policy
include/net/sctp/structs.h | 23 ++++-
include/uapi/linux/sctp.h | 42 ++++++++
net/sctp/associola.c | 1 +
net/sctp/chunk.c | 25 ++++-
net/sctp/endpointola.c | 1 +
net/sctp/output.c | 2 +
net/sctp/outqueue.c | 99 +++++++++++++++++++
net/sctp/sm_make_chunk.c | 27 +++--
net/sctp/socket.c | 240 ++++++++++++++++++++++++++++++++++++++++++++-
9 files changed, 447 insertions(+), 13 deletions(-)
--
2.1.0
