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93164cf98c
freebsd-dev/sys/netinet/sctp_var.h
Randall Stewart 93164cf98c - most all includes (#include <>) migrate to the sctp_os_bsd.h file 
- Finally all splxx() are removed
 - Count error fixed in mapping array which might
   cause a wrong cumack generation.
 - Invariants around panic for case D + printf when no invariants.
 - one-to-one model race condition fixed by using
   a pre-formed connection and then completing the
   work so accept won't happen on a non-formed
   association.
 - Some additional paranoia checks in sctp_output.
 - Locks that were missing in the accept code.

Approved by:	gnn
2007-01-18 09:58:43 +00:00

477 lines
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/*-
* Copyright (c) 2001-2007, 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.
*/
/* $KAME: sctp_var.h,v 1.24 2005/03/06 16:04:19 itojun Exp $ */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef _NETINET_SCTP_VAR_H_
#define _NETINET_SCTP_VAR_H_
#include <sys/socketvar.h>
#include <netinet/sctp_uio.h>
/* SCTP Kernel structures */
/*
* Names for SCTP sysctl objects
*/
#define SCTPCTL_MAXDGRAM 1 /* max datagram size */
#define SCTPCTL_RECVSPACE 2 /* default receive buffer space */
#define SCTPCTL_AUTOASCONF 3 /* auto asconf enable/disable flag */
#define SCTPCTL_ECN_ENABLE 4 /* Is ecn allowed */
#define SCTPCTL_ECN_NONCE 5 /* Is ecn nonce allowed */
#define SCTPCTL_STRICT_SACK 6 /* strictly require sack'd TSN's to be
* smaller than sndnxt. */
#define SCTPCTL_NOCSUM_LO 7 /* Require that the Loopback NOT have
* the crc32 checksum on packets
* routed over it. */
#define SCTPCTL_STRICT_INIT 8
#define SCTPCTL_PEER_CHK_OH 9
#define SCTPCTL_MAXBURST 10
#define SCTPCTL_MAXCHUNKONQ 11
#define SCTPCTL_DELAYED_SACK 12
#define SCTPCTL_HB_INTERVAL 13
#define SCTPCTL_PMTU_RAISE 14
#define SCTPCTL_SHUTDOWN_GUARD 15
#define SCTPCTL_SECRET_LIFETIME 16
#define SCTPCTL_RTO_MAX 17
#define SCTPCTL_RTO_MIN 18
#define SCTPCTL_RTO_INITIAL 19
#define SCTPCTL_INIT_RTO_MAX 20
#define SCTPCTL_COOKIE_LIFE 21
#define SCTPCTL_INIT_RTX_MAX 22
#define SCTPCTL_ASSOC_RTX_MAX 23
#define SCTPCTL_PATH_RTX_MAX 24
#define SCTPCTL_NR_OUTGOING_STREAMS 25
#define SCTPCTL_CMT_ON_OFF 26
#define SCTPCTL_CWND_MAXBURST 27
#define SCTPCTL_EARLY_FR 28
#define SCTPCTL_RTTVAR_CC 29
#define SCTPCTL_DEADLOCK_DET 30
#define SCTPCTL_EARLY_FR_MSEC 31
#define SCTPCTL_ASCONF_AUTH_NOCHK 32
#define SCTPCTL_AUTH_DISABLE 33
#define SCTPCTL_AUTH_RANDOM_LEN 34
#define SCTPCTL_AUTH_HMAC_ID 35
#define SCTPCTL_ABC_L_VAR 36
#define SCTPCTL_MAX_MBUF_CHAIN 37
#define SCTPCTL_CMT_USE_DAC 38
#define SCTPCTL_DO_DRAIN 39
#define SCTPCTL_WARM_CRC32 40
#define SCTPCTL_QLIMIT_ABORT 41
#define SCTPCTL_STRICT_ORDER 42
#define SCTPCTL_TCBHASHSIZE 43
#define SCTPCTL_PCBHASHSIZE 44
#define SCTPCTL_CHUNKSCALE 45
#define SCTPCTL_MINSPLIT 46
#define SCTPCTL_ADD_MORE 47
#define SCTPCTL_SYS_RESC 48
#define SCTPCTL_ASOC_RESC 49
#define SCTPCTL_NAT_FRIENDLY 50
#ifdef SCTP_DEBUG
#define SCTPCTL_DEBUG 51
#define SCTPCTL_MAXID 51
#else
#define SCTPCTL_MAXID 50
#endif
#ifdef SCTP_DEBUG
#define SCTPCTL_NAMES { \
{ 0, 0 }, \
{ "sendspace", CTLTYPE_INT }, \
{ "recvspace", CTLTYPE_INT }, \
{ "autoasconf", CTLTYPE_INT }, \
{ "ecn_enable", CTLTYPE_INT }, \
{ "ecn_nonce", CTLTYPE_INT }, \
{ "strict_sack", CTLTYPE_INT }, \
{ "looback_nocsum", CTLTYPE_INT }, \
{ "strict_init", CTLTYPE_INT }, \
{ "peer_chkoh", CTLTYPE_INT }, \
{ "maxburst", CTLTYPE_INT }, \
{ "maxchunks", CTLTYPE_INT }, \
{ "delayed_sack_time", CTLTYPE_INT }, \
{ "heartbeat_interval", CTLTYPE_INT }, \
{ "pmtu_raise_time", CTLTYPE_INT }, \
{ "shutdown_guard_time", CTLTYPE_INT }, \
{ "secret_lifetime", CTLTYPE_INT }, \
{ "rto_max", CTLTYPE_INT }, \
{ "rto_min", CTLTYPE_INT }, \
{ "rto_initial", CTLTYPE_INT }, \
{ "init_rto_max", CTLTYPE_INT }, \
{ "valid_cookie_life", CTLTYPE_INT }, \
{ "init_rtx_max", CTLTYPE_INT }, \
{ "assoc_rtx_max", CTLTYPE_INT }, \
{ "path_rtx_max", CTLTYPE_INT }, \
{ "nr_outgoing_streams", CTLTYPE_INT }, \
{ "cmt_on_off", CTLTYPE_INT }, \
{ "cwnd_maxburst", CTLTYPE_INT }, \
{ "early_fast_retran", CTLTYPE_INT }, \
{ "use_rttvar_congctrl", CTLTYPE_INT }, \
{ "deadlock_detect", CTLTYPE_INT }, \
{ "early_fast_retran_msec", CTLTYPE_INT }, \
{ "asconf_auth_nochk", CTLTYPE_INT }, \
{ "auth_disable", CTLTYPE_INT }, \
{ "auth_random_len", CTLTYPE_INT }, \
{ "auth_hmac_id", CTLTYPE_INT }, \
{ "abc_l_var", CTLTYPE_INT }, \
{ "max_mbuf_chain", CTLTYPE_INT }, \
{ "cmt_use_dac", CTLTYPE_INT }, \
{ "do_sctp_drain", CTLTYPE_INT }, \
{ "warm_crc_table", CTLTYPE_INT }, \
{ "abort_at_limit", CTLTYPE_INT }, \
{ "strict_data_order", CTLTYPE_INT }, \
{ "tcbhashsize", CTLTYPE_INT }, \
{ "pcbhashsize", CTLTYPE_INT }, \
{ "chunkscale", CTLTYPE_INT }, \
{ "min_split_point", CTLTYPE_INT }, \
{ "add_more_on_output", CTLTYPE_INT }, \
{ "sys_resource", CTLTYPE_INT }, \
{ "asoc_resource", CTLTYPE_INT }, \
{ "nat_friendly", CTLTYPE_INT }, \
{ "debug", CTLTYPE_INT }, \
}
#else
#define SCTPCTL_NAMES { \
{ 0, 0 }, \
{ "sendspace", CTLTYPE_INT }, \
{ "recvspace", CTLTYPE_INT }, \
{ "autoasconf", CTLTYPE_INT }, \
{ "ecn_enable", CTLTYPE_INT }, \
{ "ecn_nonce", CTLTYPE_INT }, \
{ "strict_sack", CTLTYPE_INT }, \
{ "looback_nocsum", CTLTYPE_INT }, \
{ "strict_init", CTLTYPE_INT }, \
{ "peer_chkoh", CTLTYPE_INT }, \
{ "maxburst", CTLTYPE_INT }, \
{ "maxchunks", CTLTYPE_INT }, \
{ "delayed_sack_time", CTLTYPE_INT }, \
{ "heartbeat_interval", CTLTYPE_INT }, \
{ "pmtu_raise_time", CTLTYPE_INT }, \
{ "shutdown_guard_time", CTLTYPE_INT }, \
{ "secret_lifetime", CTLTYPE_INT }, \
{ "rto_max", CTLTYPE_INT }, \
{ "rto_min", CTLTYPE_INT }, \
{ "rto_initial", CTLTYPE_INT }, \
{ "init_rto_max", CTLTYPE_INT }, \
{ "valid_cookie_life", CTLTYPE_INT }, \
{ "init_rtx_max", CTLTYPE_INT }, \
{ "assoc_rtx_max", CTLTYPE_INT }, \
{ "path_rtx_max", CTLTYPE_INT }, \
{ "nr_outgoing_streams", CTLTYPE_INT }, \
{ "cmt_on_off", CTLTYPE_INT }, \
{ "cwnd_maxburst", CTLTYPE_INT }, \
{ "early_fast_retran", CTLTYPE_INT }, \
{ "use_rttvar_congctrl", CTLTYPE_INT }, \
{ "deadlock_detect", CTLTYPE_INT }, \
{ "early_fast_retran_msec", CTLTYPE_INT }, \
{ "asconf_auth_nochk", CTLTYPE_INT }, \
{ "auth_disable", CTLTYPE_INT }, \
{ "auth_random_len", CTLTYPE_INT }, \
{ "auth_hmac_id", CTLTYPE_INT }, \
{ "abc_l_var", CTLTYPE_INT }, \
{ "max_mbuf_chain", CTLTYPE_INT }, \
{ "cmt_use_dac", CTLTYPE_INT }, \
{ "do_sctp_drain", CTLTYPE_INT }, \
{ "warm_crc_table", CTLTYPE_INT }, \
{ "abort_at_limit", CTLTYPE_INT }, \
{ "strict_data_order", CTLTYPE_INT }, \
{ "tcbhashsize", CTLTYPE_INT }, \
{ "pcbhashsize", CTLTYPE_INT }, \
{ "chunkscale", CTLTYPE_INT }, \
{ "min_split_point", CTLTYPE_INT }, \
{ "add_more_on_output", CTLTYPE_INT }, \
{ "sys_resource", CTLTYPE_INT }, \
{ "asoc_resource", CTLTYPE_INT }, \
{ "nat_friendly", CTLTYPE_INT }, \
}
#endif
#if defined(_KERNEL)
#ifdef SYSCTL_DECL
SYSCTL_DECL(_net_inet_sctp);
#endif
extern struct pr_usrreqs sctp_usrreqs;
#define sctp_feature_on(inp, feature) (inp->sctp_features |= feature)
#define sctp_feature_off(inp, feature) (inp->sctp_features &= ~feature)
#define sctp_is_feature_on(inp, feature) (inp->sctp_features & feature)
#define sctp_is_feature_off(inp, feature) ((inp->sctp_features & feature) == 0)
#define sctp_sbspace(asoc, sb) ((long) (((sb)->sb_hiwat > (asoc)->sb_cc) ? ((sb)->sb_hiwat - (asoc)->sb_cc) : 0))
#define sctp_sbspace_failedmsgs(sb) ((long) (((sb)->sb_hiwat > (sb)->sb_cc) ? ((sb)->sb_hiwat - (sb)->sb_cc) : 0))
#define sctp_sbspace_sub(a,b) ((a > b) ? (a - b) : 0)
extern uint32_t sctp_asoc_free_resc_limit;
extern uint32_t sctp_system_free_resc_limit;
/* I tried to cache the readq entries at one
* point. But the reality is that it did not
* add any performance since this meant
* we had to lock the STCB on read. And at that point
* once you have to do an extra lock, it really does
* not matter if the lock is in the ZONE stuff or
* in our code. Note that this same problem would
* occur with an mbuf cache as well so it is
* not really worth doing, at least right now :-D
*/
#define sctp_free_a_readq(_stcb, _readq) { \
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, (_readq)); \
SCTP_DECR_READQ_COUNT(); \
}
#define sctp_alloc_a_readq(_stcb, _readq) { \
(_readq) = (struct sctp_queued_to_read *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_readq); \
if ((_readq)) { \
SCTP_INCR_READQ_COUNT(); \
} \
}
#define sctp_free_a_strmoq(_stcb, _strmoq) { \
if (((_stcb)->asoc.free_strmoq_cnt > sctp_asoc_free_resc_limit) || \
(sctppcbinfo.ipi_free_strmoq > sctp_system_free_resc_limit)) { \
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, (_strmoq)); \
SCTP_DECR_STRMOQ_COUNT(); \
} else { \
TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_strmoq, (_strmoq), next); \
(_stcb)->asoc.free_strmoq_cnt++; \
atomic_add_int(&sctppcbinfo.ipi_free_strmoq, 1); \
} \
}
#define sctp_alloc_a_strmoq(_stcb, _strmoq) { \
if(TAILQ_EMPTY(&(_stcb)->asoc.free_strmoq)) { \
(_strmoq) = (struct sctp_stream_queue_pending *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_strmoq); \
if ((_strmoq)) { \
SCTP_INCR_STRMOQ_COUNT(); \
} \
} else { \
(_strmoq) = TAILQ_FIRST(&(_stcb)->asoc.free_strmoq); \
TAILQ_REMOVE(&(_stcb)->asoc.free_strmoq, (_strmoq), next); \
atomic_subtract_int(&sctppcbinfo.ipi_free_strmoq, 1); \
(_stcb)->asoc.free_strmoq_cnt--; \
} \
}
#define sctp_free_a_chunk(_stcb, _chk) { \
if (((_stcb)->asoc.free_chunk_cnt > sctp_asoc_free_resc_limit) || \
(sctppcbinfo.ipi_free_chunks > sctp_system_free_resc_limit)) { \
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, (_chk)); \
SCTP_DECR_CHK_COUNT(); \
} else { \
TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
(_stcb)->asoc.free_chunk_cnt++; \
atomic_add_int(&sctppcbinfo.ipi_free_chunks, 1); \
} \
}
#define sctp_alloc_a_chunk(_stcb, _chk) { \
if(TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \
(_chk) = (struct sctp_tmit_chunk *)SCTP_ZONE_GET(sctppcbinfo.ipi_zone_chunk); \
if ((_chk)) { \
SCTP_INCR_CHK_COUNT(); \
} \
} else { \
(_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \
TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1); \
(_stcb)->asoc.free_chunk_cnt--; \
} \
}
#define sctp_free_remote_addr(__net) { \
if ((__net)) { \
if (atomic_fetchadd_int(&(__net)->ref_count, -1) == 1) { \
SCTP_OS_TIMER_STOP(&(__net)->rxt_timer.timer); \
SCTP_OS_TIMER_STOP(&(__net)->pmtu_timer.timer); \
SCTP_OS_TIMER_STOP(&(__net)->fr_timer.timer); \
(__net)->dest_state = SCTP_ADDR_NOT_REACHABLE; \
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_net, (__net)); \
SCTP_DECR_RADDR_COUNT(); \
} \
} \
}
#define sctp_sbfree(ctl, stcb, sb, m) { \
uint32_t val; \
val = atomic_fetchadd_int(&(sb)->sb_cc,-(SCTP_BUF_LEN((m)))); \
if(val < SCTP_BUF_LEN((m))) { \
panic("sb_cc goes negative"); \
} \
val = atomic_fetchadd_int(&(sb)->sb_mbcnt,-(MSIZE)); \
if(val < MSIZE) { \
panic("sb_mbcnt goes negative"); \
} \
if (SCTP_BUF_IS_EXTENDED(m)) { \
val = atomic_fetchadd_int(&(sb)->sb_mbcnt,-(SCTP_BUF_EXTEND_SIZE(m))); \
if(val < SCTP_BUF_EXTEND_SIZE(m)) { \
panic("sb_mbcnt goes negative2"); \
} \
} \
if (((ctl)->do_not_ref_stcb == 0) && stcb) {\
val = atomic_fetchadd_int(&(stcb)->asoc.sb_cc,-(SCTP_BUF_LEN((m)))); \
if(val < SCTP_BUF_LEN((m))) {\
panic("stcb->sb_cc goes negative"); \
} \
val = atomic_fetchadd_int(&(stcb)->asoc.sb_mbcnt,-(MSIZE)); \
if(val < MSIZE) { \
panic("asoc->mbcnt goes negative"); \
} \
if (SCTP_BUF_IS_EXTENDED(m)) { \
val = atomic_fetchadd_int(&(stcb)->asoc.sb_mbcnt,-(SCTP_BUF_EXTEND_SIZE(m))); \
if(val < SCTP_BUF_EXTEND_SIZE(m)) { \
panic("assoc stcb->mbcnt would go negative"); \
} \
} \
} \
if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
SCTP_BUF_TYPE(m) != MT_OOBDATA) \
atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
}
#define sctp_sballoc(stcb, sb, m) { \
atomic_add_int(&(sb)->sb_cc,SCTP_BUF_LEN((m))); \
atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \
if (SCTP_BUF_IS_EXTENDED(m)) \
atomic_add_int(&(sb)->sb_mbcnt,SCTP_BUF_EXTEND_SIZE(m)); \
if(stcb) { \
atomic_add_int(&(stcb)->asoc.sb_cc,SCTP_BUF_LEN((m))); \
atomic_add_int(&(stcb)->asoc.sb_mbcnt, MSIZE); \
if (SCTP_BUF_IS_EXTENDED(m)) \
atomic_add_int(&(stcb)->asoc.sb_mbcnt,SCTP_BUF_EXTEND_SIZE(m)); \
} \
if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
SCTP_BUF_TYPE(m) != MT_OOBDATA) \
atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
}
#define sctp_ucount_incr(val) { \
val++; \
}
#define sctp_ucount_decr(val) { \
if (val > 0) { \
val--; \
} else { \
val = 0; \
} \
}
#define sctp_mbuf_crush(data) do { \
struct mbuf *_m; \
_m = (data); \
while(_m && (SCTP_BUF_LEN(_m) == 0)) { \
(data) = SCTP_BUF_NEXT(_m); \
SCTP_BUF_NEXT(_m) = NULL; \
sctp_m_free(_m); \
_m = (data); \
} \
} while (0)
/*
* some sysctls
*/
extern int sctp_sendspace;
extern int sctp_recvspace;
extern int sctp_ecn_enable;
extern int sctp_ecn_nonce;
extern int sctp_use_cwnd_based_maxburst;
extern unsigned int sctp_cmt_on_off;
extern unsigned int sctp_cmt_use_dac;
extern unsigned int sctp_cmt_sockopt_on_off;
extern uint32_t sctp_nat_friendly;
struct sctp_nets;
struct sctp_inpcb;
struct sctp_tcb;
struct sctphdr;
void sctp_ctlinput __P((int, struct sockaddr *, void *));
int sctp_ctloutput __P((struct socket *, struct sockopt *));
void sctp_input __P((struct mbuf *, int));
void sctp_drain __P((void));
void sctp_init __P((void));
void sctp_pcbinfo_cleanup(void);
int sctp_shutdown __P((struct socket *));
void sctp_notify
__P((struct sctp_inpcb *, int, struct sctphdr *,
struct sockaddr *, struct sctp_tcb *,
struct sctp_nets *));
#if defined(INET6)
void ip_2_ip6_hdr __P((struct ip6_hdr *, struct ip *));
#endif
int sctp_bindx(struct socket *, int, struct sockaddr_storage *,
int, int, struct proc *);
/* can't use sctp_assoc_t here */
int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *);
sctp_assoc_t sctp_getassocid(struct sockaddr *);
int sctp_ingetaddr(struct socket *,
struct sockaddr **
);
int sctp_peeraddr(struct socket *,
struct sockaddr **
);
int sctp_listen(struct socket *, int, struct thread *);
int sctp_accept(struct socket *, struct sockaddr **);
#endif /* _KERNEL */
#endif /* !_NETINET_SCTP_VAR_H_ */
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