[root@atom0 ~]# sysctl -d net | grep sctp
net.inet.sctp.assoclist: List of active SCTP associations
net.inet.sctp.stats: SCTP statistics (struct sctp_stat)
net.inet.sctp.mobility_fasthandoff: Enable SCTP fast handoff
net.inet.sctp.mobility_base: Enable SCTP base mobility
net.inet.sctp.default_frag_interleave: Default fragment interleave level
net.inet.sctp.default_cc_module: Default congestion control module
net.inet.sctp.log_level: Ltrace/KTR trace logging level
net.inet.sctp.max_retran_chunk: Maximum times an unlucky chunk can be retran'd before assoc abort
net.inet.sctp.min_residual: Minimum residual data chunk in second part of split
net.inet.sctp.strict_data_order: Enforce strict data ordering, abort if control inside data
net.inet.sctp.abort_at_limit: When one-2-one hits qlimit abort
net.inet.sctp.hb_max_burst: Confirmation Heartbeat max burst
net.inet.sctp.do_sctp_drain: Should SCTP respond to the drain calls
net.inet.sctp.max_chained_mbufs: Default max number of small mbufs on a chain
net.inet.sctp.abc_l_var: SCTP ABC max increase per SACK (L)
net.inet.sctp.nat_friendly: SCTP NAT friendly operation
net.inet.sctp.auth_disable: Disable SCTP AUTH function
net.inet.sctp.asconf_auth_nochk: Disable SCTP ASCONF AUTH requirement
net.inet.sctp.early_fast_retran_msec: Early Fast Retransmit minimum timer value
net.inet.sctp.early_fast_retran: Early Fast Retransmit with timer
net.inet.sctp.cwnd_maxburst: Use a CWND adjusting maxburst
net.inet.sctp.cmt_pf: CMT PF type flag
net.inet.sctp.cmt_use_dac: CMT DAC on/off flag
net.inet.sctp.cmt_on_off: CMT on/off flag
net.inet.sctp.outgoing_streams: Default number of outgoing streams
net.inet.sctp.add_more_on_output: When space wise is it worthwhile to try to add more to a socket send buffer
net.inet.sctp.path_rtx_max: Default maximum of retransmissions per path
net.inet.sctp.assoc_rtx_max: Default maximum number of retransmissions per association
net.inet.sctp.init_rtx_max: Default maximum number of retransmission for INIT chunks
net.inet.sctp.valid_cookie_life: Default cookie lifetime in sec
net.inet.sctp.init_rto_max: Default maximum retransmission timeout during association setup in msec
net.inet.sctp.rto_initial: Default initial retransmission timeout in msec
net.inet.sctp.rto_min: Default minimum retransmission timeout in msec
net.inet.sctp.rto_max: Default maximum retransmission timeout in msec
net.inet.sctp.secret_lifetime: Default secret lifetime in sec
net.inet.sctp.shutdown_guard_time: Default shutdown guard timer in sec
net.inet.sctp.pmtu_raise_time: Default PMTU raise timer in sec
net.inet.sctp.heartbeat_interval: Default heartbeat interval in msec
net.inet.sctp.asoc_resource: Max number of cached resources in an asoc
net.inet.sctp.sys_resource: Max number of cached resources in the system
net.inet.sctp.sack_freq: Default SACK frequency
net.inet.sctp.delayed_sack_time: Default delayed SACK timer in msec
net.inet.sctp.chunkscale: Tuneable for Scaling of number of chunks and messages
net.inet.sctp.min_split_point: Minimum size when splitting a chunk
net.inet.sctp.pcbhashsize: Tunable for PCB hash table sizes
net.inet.sctp.tcbhashsize: Tunable for TCB hash table sizes
net.inet.sctp.maxchunks: Default max chunks on queue per asoc
net.inet.sctp.maxburst: Default max burst for sctp endpoints
net.inet.sctp.peer_chkoh: Amount to debit peers rwnd per chunk sent
net.inet.sctp.strict_init: Enable strict INIT/INIT-ACK singleton enforcement
net.inet.sctp.loopback_nocsum: Enable NO Csum on packets sent on loopback
net.inet.sctp.strict_sacks: Enable SCTP Strict SACK checking
net.inet.sctp.ecn_nonce: Enable SCTP ECN Nonce
net.inet.sctp.ecn_enable: Enable SCTP ECN
net.inet.sctp.auto_asconf: Enable SCTP Auto-ASCONF
net.inet.sctp.recvspace: Maximum incoming SCTP buffer size
net.inet.sctp.sendspace: Maximum outgoing SCTP buffer size
net.inet.sctp.getcred: Get the ucred of a SCTP connection
net.inet6.sctp6.getcred: Get the ucred of a SCTP6 connection
[root@atom0 ~]#