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freebsd-skq/sys/netinet/sctp_sysctl.c
Randall Stewart bff64a4db3 - fixed several places where we did not release INP locks. 
- fixed a refcount bug in the new ifa structures.
- use vrf's from default stcb or inp whenever possible.
- Address limits raised to account for a full IP fragmented
  packet (1000 addresses).
- flight size correcting updated to include one message only
  and to handle case where the peer does not cumack the
  next segment aka lists 1/1 in sack blocks..
- Various bad init/init-ack handling could cause a panic
  since we tried to unlock the destroyed mutex. Fixes
  so we properly exit when we need to destroy an assoc.
  (Found by Cisco DevTest team :D)
- name rename in src-addr-selection from pass to sifa.
- route structure typedef'd to allow different platforms
  and updated into sctp_os_bsd file.
- Max retransmissions a chunk can be made added.
Reviewed by:	gnn
2007-04-03 11:15:32 +00:00

509 lines
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/*-
* Copyright (c) 2007, Cisco Systems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <netinet/sctp_os.h>
#include <netinet/sctp_constants.h>
#include <netinet/sctp_sysctl.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctputil.h>
/*
* sysctl tunable variables
*/
uint32_t sctp_sendspace = (128 * 1024);
uint32_t sctp_recvspace = 128 * (1024 +
#ifdef INET6
sizeof(struct sockaddr_in6)
#else
sizeof(struct sockaddr_in)
#endif
);
uint32_t sctp_mbuf_threshold_count = SCTP_DEFAULT_MBUFS_IN_CHAIN;
uint32_t sctp_auto_asconf = SCTP_DEFAULT_AUTO_ASCONF;
uint32_t sctp_ecn_enable = 1;
uint32_t sctp_ecn_nonce = 0;
uint32_t sctp_strict_sacks = 0;
uint32_t sctp_no_csum_on_loopback = 1;
uint32_t sctp_strict_init = 1;
uint32_t sctp_abort_if_one_2_one_hits_limit = 0;
uint32_t sctp_strict_data_order = 0;
uint32_t sctp_peer_chunk_oh = sizeof(struct mbuf);
uint32_t sctp_max_burst_default = SCTP_DEF_MAX_BURST;
uint32_t sctp_use_cwnd_based_maxburst = 1;
uint32_t sctp_do_drain = 1;
uint32_t sctp_hb_maxburst = SCTP_DEF_MAX_BURST;
uint32_t sctp_max_chunks_on_queue = SCTP_ASOC_MAX_CHUNKS_ON_QUEUE;
uint32_t sctp_delayed_sack_time_default = SCTP_RECV_MSEC;
uint32_t sctp_sack_freq_default = SCTP_DEFAULT_SACK_FREQ;
uint32_t sctp_heartbeat_interval_default = SCTP_HB_DEFAULT_MSEC;
uint32_t sctp_pmtu_raise_time_default = SCTP_DEF_PMTU_RAISE_SEC;
uint32_t sctp_shutdown_guard_time_default = SCTP_DEF_MAX_SHUTDOWN_SEC;
uint32_t sctp_secret_lifetime_default = SCTP_DEFAULT_SECRET_LIFE_SEC;
uint32_t sctp_rto_max_default = SCTP_RTO_UPPER_BOUND;
uint32_t sctp_rto_min_default = SCTP_RTO_LOWER_BOUND;
uint32_t sctp_rto_initial_default = SCTP_RTO_INITIAL;
uint32_t sctp_init_rto_max_default = SCTP_RTO_UPPER_BOUND;
uint32_t sctp_valid_cookie_life_default = SCTP_DEFAULT_COOKIE_LIFE;
uint32_t sctp_init_rtx_max_default = SCTP_DEF_MAX_INIT;
uint32_t sctp_assoc_rtx_max_default = SCTP_DEF_MAX_SEND;
uint32_t sctp_path_rtx_max_default = SCTP_DEF_MAX_PATH_RTX;
uint32_t sctp_nr_outgoing_streams_default = SCTP_OSTREAM_INITIAL;
uint32_t sctp_add_more_threshold = SCTP_DEFAULT_ADD_MORE;
uint32_t sctp_asoc_free_resc_limit = SCTP_DEF_ASOC_RESC_LIMIT;
uint32_t sctp_system_free_resc_limit = SCTP_DEF_SYSTEM_RESC_LIMIT;
uint32_t sctp_min_split_point = SCTP_DEFAULT_SPLIT_POINT_MIN;
uint32_t sctp_pcbtblsize = SCTP_PCBHASHSIZE;
uint32_t sctp_hashtblsize = SCTP_TCBHASHSIZE;
uint32_t sctp_chunkscale = SCTP_CHUNKQUEUE_SCALE;
uint32_t sctp_cmt_on_off = 0;
uint32_t sctp_cmt_use_dac = 0;
uint32_t sctp_max_retran_chunk = SCTPCTL_MAX_RETRAN_CHUNK_DEFAULT;
uint32_t sctp_L2_abc_variable = 1;
uint32_t sctp_early_fr = 0;
uint32_t sctp_early_fr_msec = SCTP_MINFR_MSEC_TIMER;
uint32_t sctp_says_check_for_deadlock = 0;
uint32_t sctp_asconf_auth_nochk = 0;
uint32_t sctp_auth_disable = 0;
uint32_t sctp_nat_friendly = 1;
uint32_t sctp_min_residual = SCTPCTL_MIN_RESIDUAL_DEFAULT;;
struct sctpstat sctpstat;
#ifdef SCTP_DEBUG
uint32_t sctp_debug_on = 0;
#endif
/*
* sysctl functions
*/
static int
sctp_assoclist(SYSCTL_HANDLER_ARGS)
{
unsigned int number_of_endpoints;
unsigned int number_of_local_addresses;
unsigned int number_of_associations;
unsigned int number_of_remote_addresses;
unsigned int n;
int error;
struct sctp_inpcb *inp;
struct sctp_tcb *stcb;
struct sctp_nets *net;
struct sctp_laddr *laddr;
struct xsctp_inpcb xinpcb;
struct xsctp_tcb xstcb;
/* struct xsctp_laddr xladdr; */
struct xsctp_raddr xraddr;
number_of_endpoints = 0;
number_of_local_addresses = 0;
number_of_associations = 0;
number_of_remote_addresses = 0;
SCTP_INP_INFO_RLOCK();
if (req->oldptr == USER_ADDR_NULL) {
LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
SCTP_INP_RLOCK(inp);
number_of_endpoints++;
/* FIXME MT */
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
number_of_local_addresses++;
}
LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
number_of_associations++;
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
number_of_remote_addresses++;
}
}
SCTP_INP_RUNLOCK(inp);
}
SCTP_INP_INFO_RUNLOCK();
n = (number_of_endpoints + 1) * sizeof(struct xsctp_inpcb) +
number_of_local_addresses * sizeof(struct xsctp_laddr) +
number_of_associations * sizeof(struct xsctp_tcb) +
number_of_remote_addresses * sizeof(struct xsctp_raddr);
#ifdef SCTP_DEBUG
printf("inps = %u, stcbs = %u, laddrs = %u, raddrs = %u\n",
number_of_endpoints, number_of_associations,
number_of_local_addresses, number_of_remote_addresses);
#endif
/* request some more memory than needed */
req->oldidx = (n + n / 8);
return 0;
}
if (req->newptr != USER_ADDR_NULL) {
SCTP_INP_INFO_RUNLOCK();
return EPERM;
}
LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
SCTP_INP_RLOCK(inp);
number_of_local_addresses = 0;
number_of_associations = 0;
/*
* LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr)
* { number_of_local_addresses++; }
*/
LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
number_of_associations++;
}
xinpcb.last = 0;
xinpcb.local_port = ntohs(inp->sctp_lport);
xinpcb.number_local_addresses = number_of_local_addresses;
xinpcb.number_associations = number_of_associations;
xinpcb.flags = inp->sctp_flags;
xinpcb.features = inp->sctp_features;
xinpcb.total_sends = inp->total_sends;
xinpcb.total_recvs = inp->total_recvs;
xinpcb.total_nospaces = inp->total_nospaces;
SCTP_INP_INCR_REF(inp);
SCTP_INP_RUNLOCK(inp);
SCTP_INP_INFO_RUNLOCK();
error = SYSCTL_OUT(req, &xinpcb, sizeof(struct xsctp_inpcb));
if (error) {
return error;
}
SCTP_INP_INFO_RLOCK();
SCTP_INP_RLOCK(inp);
/* FIXME MT */
/*
* LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr)
* { error = SYSCTL_OUT(req, &xladdr, sizeof(struct
* xsctp_laddr)); if (error) { #if
* defined(SCTP_PER_SOCKET_LOCKING)
* SCTP_SOCKET_UNLOCK(SCTP_INP_SO(inp), 1);
* SCTP_UNLOCK_SHARED(sctppcbinfo.ipi_ep_mtx); #endif
* SCTP_INP_RUNLOCK(inp); SCTP_INP_INFO_RUNLOCK(); return
* error; } }
*/
LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
SCTP_TCB_LOCK(stcb);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
number_of_local_addresses = 0;
number_of_remote_addresses = 0;
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
number_of_remote_addresses++;
}
xstcb.LocalPort = ntohs(inp->sctp_lport);
xstcb.RemPort = ntohs(stcb->rport);
if (stcb->asoc.primary_destination != NULL)
xstcb.RemPrimAddr = stcb->asoc.primary_destination->ro._l_addr;
xstcb.HeartBeatInterval = stcb->asoc.heart_beat_delay;
xstcb.State = SCTP_GET_STATE(&stcb->asoc); /* FIXME */
xstcb.InStreams = stcb->asoc.streamincnt;
xstcb.OutStreams = stcb->asoc.streamoutcnt;
xstcb.MaxRetr = stcb->asoc.overall_error_count;
xstcb.PrimProcess = 0; /* not really supported yet */
xstcb.T1expireds = stcb->asoc.timoinit + stcb->asoc.timocookie;
xstcb.T2expireds = stcb->asoc.timoshutdown + stcb->asoc.timoshutdownack;
xstcb.RtxChunks = stcb->asoc.marked_retrans;
xstcb.StartTime = stcb->asoc.start_time;
xstcb.DiscontinuityTime = stcb->asoc.discontinuity_time;
xstcb.number_local_addresses = number_of_local_addresses;
xstcb.number_remote_addresses = number_of_remote_addresses;
xstcb.total_sends = stcb->total_sends;
xstcb.total_recvs = stcb->total_recvs;
xstcb.local_tag = stcb->asoc.my_vtag;
xstcb.remote_tag = stcb->asoc.peer_vtag;
xstcb.initial_tsn = stcb->asoc.init_seq_number;
xstcb.highest_tsn = stcb->asoc.sending_seq - 1;
xstcb.cumulative_tsn = stcb->asoc.last_acked_seq;
xstcb.cumulative_tsn_ack = stcb->asoc.cumulative_tsn;
SCTP_INP_RUNLOCK(inp);
SCTP_INP_INFO_RUNLOCK();
error = SYSCTL_OUT(req, &xstcb, sizeof(struct xsctp_tcb));
if (error) {
atomic_add_int(&stcb->asoc.refcnt, -1);
return error;
}
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
xraddr.RemAddr = net->ro._l_addr;
xraddr.RemAddrActive = ((net->dest_state & SCTP_ADDR_REACHABLE) == SCTP_ADDR_REACHABLE);
xraddr.RemAddrConfirmed = ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0);
xraddr.RemAddrHBActive = ((net->dest_state & SCTP_ADDR_NOHB) == 0);
xraddr.RemAddrRTO = net->RTO;
xraddr.RemAddrMaxPathRtx = net->failure_threshold;
xraddr.RemAddrRtx = net->marked_retrans;
xraddr.RemAddrErrorCounter = net->error_count;
xraddr.RemAddrCwnd = net->cwnd;
xraddr.RemAddrFlightSize = net->flight_size;
xraddr.RemAddrStartTime = net->start_time;
error = SYSCTL_OUT(req, &xraddr, sizeof(struct xsctp_raddr));
if (error) {
atomic_add_int(&stcb->asoc.refcnt, -1);
return error;
}
}
atomic_add_int(&stcb->asoc.refcnt, -1);
SCTP_INP_INFO_RLOCK();
SCTP_INP_RLOCK(inp);
}
SCTP_INP_DECR_REF(inp);
SCTP_INP_RUNLOCK(inp);
}
SCTP_INP_INFO_RUNLOCK();
xinpcb.last = 1;
xinpcb.local_port = 0;
xinpcb.number_local_addresses = 0;
xinpcb.number_associations = 0;
xinpcb.flags = 0;
xinpcb.features = 0;
error = SYSCTL_OUT(req, &xinpcb, sizeof(struct xsctp_inpcb));
return error;
}
/*
* sysctl definitions
*/
SYSCTL_INT(_net_inet_sctp, OID_AUTO, sendspace, CTLFLAG_RW,
&sctp_sendspace, 0, "Maximum outgoing SCTP buffer size");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, recvspace, CTLFLAG_RW,
&sctp_recvspace, 0, "Maximum incoming SCTP buffer size");
#if defined(__FreeBSD__) || defined(SCTP_APPLE_AUTO_ASCONF)
SYSCTL_INT(_net_inet_sctp, OID_AUTO, auto_asconf, CTLFLAG_RW,
&sctp_auto_asconf, 0, "Enable SCTP Auto-ASCONF");
#endif
SYSCTL_INT(_net_inet_sctp, OID_AUTO, ecn_enable, CTLFLAG_RW,
&sctp_ecn_enable, 0, "Enable SCTP ECN");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, ecn_nonce, CTLFLAG_RW,
&sctp_ecn_nonce, 0, "Enable SCTP ECN Nonce");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, strict_sacks, CTLFLAG_RW,
&sctp_strict_sacks, 0, "Enable SCTP Strict SACK checking");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, loopback_nocsum, CTLFLAG_RW,
&sctp_no_csum_on_loopback, 0,
"Enable NO Csum on packets sent on loopback");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, strict_init, CTLFLAG_RW,
&sctp_strict_init, 0,
"Enable strict INIT/INIT-ACK singleton enforcement");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, peer_chkoh, CTLFLAG_RW,
&sctp_peer_chunk_oh, 0,
"Amount to debit peers rwnd per chunk sent");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, maxburst, CTLFLAG_RW,
&sctp_max_burst_default, 0,
"Default max burst for sctp endpoints");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, maxchunks, CTLFLAG_RW,
&sctp_max_chunks_on_queue, 0,
"Default max chunks on queue per asoc");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, tcbhashsize, CTLFLAG_RW,
&sctp_hashtblsize, 0,
"Tuneable for Hash table sizes");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, min_split_point, CTLFLAG_RW,
&sctp_min_split_point, 0,
"Minimum size when splitting a chunk");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, pcbhashsize, CTLFLAG_RW,
&sctp_pcbtblsize, 0,
"Tuneable for PCB Hash table sizes");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, sys_resource, CTLFLAG_RW,
&sctp_system_free_resc_limit, 0,
"Max number of cached resources in the system");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, asoc_resource, CTLFLAG_RW,
&sctp_asoc_free_resc_limit, 0,
"Max number of cached resources in an asoc");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, chunkscale, CTLFLAG_RW,
&sctp_chunkscale, 0,
"Tuneable for Scaling of number of chunks and messages");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, delayed_sack_time, CTLFLAG_RW,
&sctp_delayed_sack_time_default, 0,
"Default delayed SACK timer in msec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, sack_freq, CTLFLAG_RW,
&sctp_sack_freq_default, 0,
"Default SACK frequency");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, heartbeat_interval, CTLFLAG_RW,
&sctp_heartbeat_interval_default, 0,
"Default heartbeat interval in msec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, pmtu_raise_time, CTLFLAG_RW,
&sctp_pmtu_raise_time_default, 0,
"Default PMTU raise timer in sec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, shutdown_guard_time, CTLFLAG_RW,
&sctp_shutdown_guard_time_default, 0,
"Default shutdown guard timer in sec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, secret_lifetime, CTLFLAG_RW,
&sctp_secret_lifetime_default, 0,
"Default secret lifetime in sec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, rto_max, CTLFLAG_RW,
&sctp_rto_max_default, 0,
"Default maximum retransmission timeout in msec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, rto_min, CTLFLAG_RW,
&sctp_rto_min_default, 0,
"Default minimum retransmission timeout in msec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, rto_initial, CTLFLAG_RW,
&sctp_rto_initial_default, 0,
"Default initial retransmission timeout in msec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, init_rto_max, CTLFLAG_RW,
&sctp_init_rto_max_default, 0,
"Default maximum retransmission timeout during association setup in msec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, valid_cookie_life, CTLFLAG_RW,
&sctp_valid_cookie_life_default, 0,
"Default cookie lifetime in sec");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, init_rtx_max, CTLFLAG_RW,
&sctp_init_rtx_max_default, 0,
"Default maximum number of retransmission for INIT chunks");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, assoc_rtx_max, CTLFLAG_RW,
&sctp_assoc_rtx_max_default, 0,
"Default maximum number of retransmissions per association");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, path_rtx_max, CTLFLAG_RW,
&sctp_path_rtx_max_default, 0,
"Default maximum of retransmissions per path");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, add_more_on_output, CTLFLAG_RW,
&sctp_add_more_threshold, 0,
"When space wise is it worthwhile to try to add more to a socket send buffer");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, outgoing_streams, CTLFLAG_RW,
&sctp_nr_outgoing_streams_default, 0,
"Default number of outgoing streams");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, cmt_on_off, CTLFLAG_RW,
&sctp_cmt_on_off, 0,
"CMT ON/OFF flag");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, cwnd_maxburst, CTLFLAG_RW,
&sctp_use_cwnd_based_maxburst, 0,
"Use a CWND adjusting maxburst");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, early_fast_retran, CTLFLAG_RW,
&sctp_early_fr, 0,
"Early Fast Retransmit with timer");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, deadlock_detect, CTLFLAG_RW,
&sctp_says_check_for_deadlock, 0,
"SMP Deadlock detection on/off");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, early_fast_retran_msec, CTLFLAG_RW,
&sctp_early_fr_msec, 0,
"Early Fast Retransmit minimum timer value");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, asconf_auth_nochk, CTLFLAG_RW,
&sctp_asconf_auth_nochk, 0,
"Disable SCTP ASCONF AUTH requirement");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, auth_disable, CTLFLAG_RW,
&sctp_auth_disable, 0,
"Disable SCTP AUTH function");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, nat_friendly, CTLFLAG_RW,
&sctp_nat_friendly, 0,
"SCTP NAT friendly operation");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, abc_l_var, CTLFLAG_RW,
&sctp_L2_abc_variable, 0,
"SCTP ABC max increase per SACK (L)");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, max_chained_mbufs, CTLFLAG_RW,
&sctp_mbuf_threshold_count, 0,
"Default max number of small mbufs on a chain");
SYSCTL_UINT(_net_inet_sctp, OID_AUTO, cmt_use_dac, CTLFLAG_RW,
&sctp_cmt_use_dac, 0,
"CMT DAC ON/OFF flag");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, do_sctp_drain, CTLFLAG_RW,
&sctp_do_drain, 0,
"Should SCTP respond to the drain calls");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, hb_max_burst, CTLFLAG_RW,
&sctp_hb_maxburst, 0,
"Confirmation Heartbeat max burst?");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, abort_at_limit, CTLFLAG_RW,
&sctp_abort_if_one_2_one_hits_limit, 0,
"When one-2-one hits qlimit abort");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, strict_data_order, CTLFLAG_RW,
&sctp_strict_data_order, 0,
"Enforce strict data ordering, abort if control inside data");
SYSCTL_STRUCT(_net_inet_sctp, OID_AUTO, stats, CTLFLAG_RW,
&sctpstat, sctpstat,
"SCTP statistics (struct sctps_stat, netinet/sctp.h");
SYSCTL_PROC(_net_inet_sctp, OID_AUTO, assoclist, CTLFLAG_RD,
0, 0, sctp_assoclist,
"S,xassoc", "List of active SCTP associations");
SYSCTL_INT(_net_inet_sctp, OID_AUTO, min_residual, CTLFLAG_RW,
&sctp_min_residual, 0,
SCTPCTL_MIN_RESIDUAL_DESC);
SYSCTL_INT(_net_inet_sctp, OID_AUTO, max_retran_chunk, CTLFLAG_RW,
&sctp_max_retran_chunk, 0,
SCTPCTL_MAX_RETRAN_CHUNK_DESC);
#ifdef SCTP_DEBUG
SYSCTL_INT(_net_inet_sctp, OID_AUTO, debug, CTLFLAG_RW,
&sctp_debug_on, 0, "Configure debug output");
#endif /* SCTP_DEBUG */
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