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freebsd-dev/sys/netinet/sctputil.h
Randall Stewart f42a358a6f - Copyright updates (aka 2007) 
- ZONE get now also take a type cast so it does the
  cast like mtod does.
- New macro SCTP_LIST_EMPTY, which in bsd is just
  LIST_EMPTY
- Removal of const in some of the static hmac functions
  (not needed)
- Store length changes to allow for new fields in auth
- Auth code updated to current draft (this should be the
  RFC version we think).
- use uint8_t instead of u_char in LOOPBACK address comparison
- Some u_int32_t converted to uint32_t (in crc code)
- A bug was found in the mib counts for ordered/unordered
  count, this was fixed (was referencing a freed mbuf).
- SCTP_ASOCLOG_OF_TSNS added (code will probably disappear
  after my testing completes. It allows us to keep a
  small log on each assoc of the last 40 TSN's in/out and
  stream assignment. It is NOT in options and so is only
  good for private builds.
- Some CMT changes in prep for Jana fixing his problem
  with reneging when CMT is enabled (Concurrent Multipath
  Transfer = CMT).
- Some missing mib stats added.
- Correction to number of open assoc's count in mib
- Correction to os_bsd.h to get right sha2 macros
- Add of special AUTH_04 flags so you can compile the code
  with the old format (in case the peer does not yet support
  the latest auth code).
- Nonce sum was incorrectly being set in when ecn_nonce was
  NOT on.
- LOR in listen with implicit bind found and fixed.
- Moved away from using mbuf's for socket options to using
  just data pointers. The mbufs were used to harmonize
  NetBSD code since both Net and Open used this method. We
  have decided to move away from that and more conform to
  FreeBSD style (which makes more sense).
- Very very nasty bug found in some of my "debug" code. The
  cookie_how collision case tracking had an endless loop in
  it if you got a second retransmission of a cookie collision
  case. This would lock up  a CPU .. ugly..
- auth function goes to using size_t instead of int which
  conforms to socketapi better
- Found the nasty bug that happens after 9 days of testing.. you
  get the data chunk, deliver it and due to the reference to a ch->
  that every now and then has been deleted (depending on the postion
  in the mbuf) you have an invalid ch->ch.flags.. and thus you don't
  advance the stream sequence number.. so you block the stream
  permanently. The fix is to make local variables of these guys
  and set them up before you have any chance of trimming the
  mbuf.
- style fix in sctp_util.h, not sure how this got bad maybe in
  the last patch? (aka it may not be in the real source).
- Found interesting bug when using the extended snd/rcv info where
  we would get an error on receiving with this. Thats because
  it was NOT padded to the same size as the snd_rcv info. We
  increase (add the pad) so the two structs are the same size
  in sctp_uio.h
- In sctp_usrreq.c one of the most common things we did for
  socket options was to cast the pointer and validate the size.
  This as been macro-ized to help make the code more readable.
- in sctputil.c two things, the socketapi class found a missing
  flag type (the next msg is a notification) and a missing
  scope recovery was also fixed.

Reviewed by:	gnn
2007-02-12 23:24:31 +00:00

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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: sctputil.h,v 1.15 2005/03/06 16:04:19 itojun Exp $ */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef __sctputil_h__
#define __sctputil_h__
#if defined(_KERNEL)
#ifdef SCTP_MBUF_LOGGING
struct mbuf *sctp_m_free(struct mbuf *m);
void sctp_m_freem(struct mbuf *m);
#else
#define sctp_m_free m_free
#define sctp_m_freem m_freem
#endif
#define sctp_get_associd(stcb) ((sctp_assoc_t)stcb->asoc.assoc_id)
/*
* Function prototypes
*/
struct ifaddr *sctp_find_ifa_by_addr(struct sockaddr *sa);
uint32_t sctp_select_initial_TSN(struct sctp_pcb *);
uint32_t sctp_select_a_tag(struct sctp_inpcb *);
int sctp_init_asoc(struct sctp_inpcb *, struct sctp_association *, int, uint32_t);
void sctp_fill_random_store(struct sctp_pcb *);
int
sctp_timer_start(int, struct sctp_inpcb *, struct sctp_tcb *,
struct sctp_nets *);
int
sctp_timer_stop(int, struct sctp_inpcb *, struct sctp_tcb *,
struct sctp_nets *, uint32_t);
uint32_t sctp_calculate_sum(struct mbuf *, int32_t *, uint32_t);
void
sctp_mtu_size_reset(struct sctp_inpcb *, struct sctp_association *, uint32_t);
void
sctp_add_to_readq(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_queued_to_read *control,
struct sockbuf *sb,
int end);
int
sctp_append_to_readq(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_queued_to_read *control,
struct mbuf *m,
int end,
int new_cumack,
struct sockbuf *sb);
int find_next_best_mtu(int);
void
sctp_timeout_handler(void *);
uint32_t
sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *,
struct sctp_nets *, struct timeval *);
uint32_t sctp_calculate_len(struct mbuf *);
caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *);
struct sctp_paramhdr *
sctp_get_next_param(struct mbuf *, int,
struct sctp_paramhdr *, int);
int sctp_add_pad_tombuf(struct mbuf *, int);
int sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *);
void sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *);
void
sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
struct sctp_inpcb *new_inp,
struct sctp_tcb *stcb);
void sctp_stop_timers_for_shutdown(struct sctp_tcb *);
void sctp_report_all_outbound(struct sctp_tcb *, int);
int sctp_expand_mapping_array(struct sctp_association *);
void sctp_abort_notification(struct sctp_tcb *, int);
/* We abort responding to an IP packet for some reason */
void
sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *,
struct mbuf *, int, struct sctphdr *, struct mbuf *);
/* We choose to abort via user input */
void
sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *, int,
struct mbuf *);
void
sctp_handle_ootb(struct mbuf *, int, int, struct sctphdr *,
struct sctp_inpcb *, struct mbuf *);
int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *);
uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
struct sockaddr_in6 *
sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
#define sctp_recover_scope_mac(addr, store) do { \
if ((addr->sin6_family == AF_INET6) && \
(IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \
*store = *addr; \
if (addr->sin6_scope_id == 0) { \
if (!sa6_recoverscope(store)) { \
addr = store; \
} \
} else { \
in6_clearscope(&addr->sin6_addr); \
addr = store; \
} \
} \
} while (0)
int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);
void sctp_print_address(struct sockaddr *);
void sctp_print_address_pkt(struct ip *, struct sctphdr *);
void
sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb,
uint32_t error, int no_lock);
int
sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,
int, struct sctpchunk_listhead *);
struct mbuf *sctp_generate_invmanparam(int);
#ifdef SCTP_MBCNT_LOGGING
void
sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *,
struct sctp_tmit_chunk *);
#else
#define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt) \
do { \
if (tp1->data != NULL) { \
atomic_add_int(&((asoc)->chunks_on_out_queue), -chk_cnt); \
if ((asoc)->total_output_queue_size >= tp1->book_size) { \
atomic_add_int(&((asoc)->total_output_queue_size), -tp1->book_size); \
} else { \
(asoc)->total_output_queue_size = 0; \
} \
if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) { \
atomic_add_int(&((stcb)->sctp_socket->so_snd.sb_cc), -tp1->book_size); \
} else { \
stcb->sctp_socket->so_snd.sb_cc = 0; \
} \
} \
} \
} while (0)
#endif
#define sctp_free_spbufspace(stcb, asoc, sp) \
do { \
if (sp->data != NULL) { \
atomic_add_int(&(asoc)->chunks_on_out_queue, -1); \
if ((asoc)->total_output_queue_size >= sp->length) { \
atomic_add_int(&(asoc)->total_output_queue_size,sp->length); \
} else { \
(asoc)->total_output_queue_size = 0; \
} \
if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \
atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \
} else { \
stcb->sctp_socket->so_snd.sb_cc = 0; \
} \
} \
} \
} while (0)
#define sctp_snd_sb_alloc(stcb, sz) \
do { \
atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \
if ((stcb->sctp_socket != NULL) && \
((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \
} \
} while (0)
int
sctp_soreceive(struct socket *so, struct sockaddr **psa,
struct uio *uio,
struct mbuf **mp0,
struct mbuf **controlp,
int *flagsp);
#ifdef SCTP_STAT_LOGGING
void
sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d);
void
sctp_wakeup_log(struct sctp_tcb *stcb,
uint32_t cumtsn,
uint32_t wake_cnt, int from);
void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int);
void sctp_log_nagle_event(struct sctp_tcb *stcb, int action);
void
sctp_log_mb(struct mbuf *m, int from);
void
sctp_sblog(struct sockbuf *sb,
struct sctp_tcb *stcb, int from, int incr);
void
sctp_log_strm_del(struct sctp_queued_to_read *control,
struct sctp_queued_to_read *poschk,
int from);
void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);
void rto_logging(struct sctp_nets *net, int from);
void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);
void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);
void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);
void sctp_log_block(uint8_t, struct socket *, struct sctp_association *, int);
void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);
void sctp_log_mbcnt(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
int sctp_fill_stat_log(struct mbuf *);
void sctp_log_fr(uint32_t, uint32_t, uint32_t, int);
void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int);
void sctp_log_map(uint32_t, uint32_t, uint32_t, int);
void sctp_clr_stat_log(void);
#endif
#ifdef SCTP_AUDITING_ENABLED
void
sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *,
struct sctp_nets *);
void sctp_audit_log(uint8_t, uint8_t);
#endif
#endif /* _KERNEL */
#endif
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