830d754d52
bit of debugging afterwards):
- Fix protection code for notification generation.
- Decouple associd from vtag
- Allow vtags to have less strigent requirements in non-uniqueness.
o don't pre-hash them when you issue one in a cookie.
o Allow duplicates and use addresses and ports to
discriminate amongst the duplicates during lookup.
- Add support for the NAT draft draft-ietf-behave-sctpnat-00, this
is still experimental and needs more extensive testing with the
Jason Butt ipfw changes.
- Support for the SENDER_DRY event to get DTLS in OpenSSL working
with a set of patches from Michael Tuexen (hopefully heading to OpenSSL soon).
- Update the support of SCTP-AUTH by Peter Lei.
- Use macros for refcounting.
- Fix MTU for UDP encapsulation.
- Fix reporting back of unsent data.
- Update assoc send counter handling to be consistent with endpoint sent counter.
- Fix a bug in PR-SCTP.
- Fix so we only send another FWD-TSN when a SACK arrives IF and only
if the adv-peer-ack point progressed. However we still make sure
a timer is running if we do have an adv_peer_ack point.
- Fix PR-SCTP bug where chunks were retransmitted if they are sent
unreliable but not abandoned yet.
With the help of: Michael Teuxen and Peter Lei :-)
MFC after: 4 weeks
524 lines
16 KiB
C
524 lines
16 KiB
C
/*-
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* Copyright (c) 2006-2007, by Cisco Systems, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* a) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* b) Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* c) Neither the name of Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef __sctp_os_bsd_h__
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#define __sctp_os_bsd_h__
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/*
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* includes
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*/
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#include "opt_ipsec.h"
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#include "opt_compat.h"
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#include "opt_inet6.h"
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#include "opt_inet.h"
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#include "opt_sctp.h"
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#include <sys/param.h>
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#include <sys/ktr.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/jail.h>
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#include <sys/sysctl.h>
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#include <sys/resourcevar.h>
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#include <sys/uio.h>
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#include <sys/lock.h>
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#include <sys/rwlock.h>
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#include <sys/kthread.h>
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#include <sys/priv.h>
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#include <sys/random.h>
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#include <sys/limits.h>
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#include <sys/queue.h>
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#include <sys/vimage.h>
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#include <machine/cpu.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/in_pcb.h>
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#include <netinet/in_var.h>
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#include <netinet/ip_var.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/icmp_var.h>
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#include <netinet/vinet.h>
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#ifdef IPSEC
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#include <netipsec/ipsec.h>
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#include <netipsec/key.h>
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#endif /* IPSEC */
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#ifdef INET6
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#include <sys/domain.h>
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#ifdef IPSEC
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#include <netipsec/ipsec6.h>
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#endif
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet/icmp6.h>
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#include <netinet6/ip6protosw.h>
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#include <netinet6/nd6.h>
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#include <netinet6/scope6_var.h>
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#endif /* INET6 */
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#include <netinet/ip_options.h>
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#ifndef in6pcb
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#define in6pcb inpcb
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#endif
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/* Declare all the malloc names for all the various mallocs */
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MALLOC_DECLARE(SCTP_M_MAP);
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MALLOC_DECLARE(SCTP_M_STRMI);
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MALLOC_DECLARE(SCTP_M_STRMO);
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MALLOC_DECLARE(SCTP_M_ASC_ADDR);
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MALLOC_DECLARE(SCTP_M_ASC_IT);
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MALLOC_DECLARE(SCTP_M_AUTH_CL);
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MALLOC_DECLARE(SCTP_M_AUTH_KY);
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MALLOC_DECLARE(SCTP_M_AUTH_HL);
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MALLOC_DECLARE(SCTP_M_AUTH_IF);
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MALLOC_DECLARE(SCTP_M_STRESET);
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MALLOC_DECLARE(SCTP_M_CMSG);
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MALLOC_DECLARE(SCTP_M_COPYAL);
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MALLOC_DECLARE(SCTP_M_VRF);
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MALLOC_DECLARE(SCTP_M_IFA);
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MALLOC_DECLARE(SCTP_M_IFN);
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MALLOC_DECLARE(SCTP_M_TIMW);
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MALLOC_DECLARE(SCTP_M_MVRF);
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MALLOC_DECLARE(SCTP_M_ITER);
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MALLOC_DECLARE(SCTP_M_SOCKOPT);
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#if defined(SCTP_LOCAL_TRACE_BUF)
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#define SCTP_GET_CYCLECOUNT get_cyclecount()
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#define SCTP_CTR6 sctp_log_trace
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#else
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#define SCTP_CTR6 CTR6
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#endif
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#define SCTP_BASE_INFO(__m) system_base_info.sctppcbinfo.__m
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#define SCTP_BASE_STATS system_base_info.sctpstat
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#define SCTP_BASE_STAT(__m) system_base_info.sctpstat.__m
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#define SCTP_BASE_SYSCTL(__m) system_base_info.sctpsysctl.__m
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#define SCTP_BASE_VAR(__m) system_base_info.__m
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/*
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* Macros to expand out globals defined by various modules
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* to either a real global or a virtualized instance of one,
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* depending on whether VIMAGE is defined.
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*/
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/* first define modules that supply us information */
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#define MOD_NET net
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#define MOD_INET inet
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#define MOD_INET6 inet6
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#define MOD_IPSEC ipsec
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/* then define the macro(s) that hook into the vimage macros */
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#if defined(__FreeBSD__) && __FreeBSD_version >= 800044 && defined(VIMAGE)
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#if 0
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#define VSYMNAME(__MODULE) vnet_ ## __MODULE
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#define MODULE_GLOBAL(__MODULE, __SYMBOL) VSYM(VSYMNAME(__MODULE), __SYMBOL)
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#else
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#define MODULE_GLOBAL(__MODULE, __SYMBOL) V_ ## __SYMBOL
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#endif
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#else
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#define MODULE_GLOBAL(__MODULE, __SYMBOL) (__SYMBOL)
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#endif
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/*
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*
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*/
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#define USER_ADDR_NULL (NULL) /* FIX ME: temp */
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#define SCTP_LIST_EMPTY(list) LIST_EMPTY(list)
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#if defined(SCTP_DEBUG)
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#define SCTPDBG(level, params...) \
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{ \
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do { \
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if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) { \
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printf(params); \
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} \
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} while (0); \
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}
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#define SCTPDBG_ADDR(level, addr) \
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{ \
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do { \
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if (SCTP_BASE_SYSCTL(sctp_debug_on) & level ) { \
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sctp_print_address(addr); \
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} \
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} while (0); \
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}
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#define SCTPDBG_PKT(level, iph, sh) \
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{ \
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do { \
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if (SCTP_BASE_SYSCTL(sctp_debug_on) & level) { \
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sctp_print_address_pkt(iph, sh); \
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} \
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} while (0); \
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}
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#else
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#define SCTPDBG(level, params...)
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#define SCTPDBG_ADDR(level, addr)
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#define SCTPDBG_PKT(level, iph, sh)
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#endif
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#define SCTP_PRINTF(params...) printf(params)
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#ifdef SCTP_LTRACE_CHUNKS
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#define SCTP_LTRACE_CHK(a, b, c, d) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_CHUNK_ENABLE) CTR6(KTR_SUBSYS, "SCTP:%d[%d]:%x-%x-%x-%x", SCTP_LOG_CHUNK_PROC, 0, a, b, c, d)
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#else
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#define SCTP_LTRACE_CHK(a, b, c, d)
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#endif
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#ifdef SCTP_LTRACE_ERRORS
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#define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
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printf("mbuf:%p inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
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m, inp, stcb, net, file, __LINE__, err);
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#define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err) if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LTRACE_ERROR_ENABLE) \
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printf("inp:%p stcb:%p net:%p file:%x line:%d error:%d\n", \
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inp, stcb, net, file, __LINE__, err);
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#else
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#define SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, file, err)
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#define SCTP_LTRACE_ERR_RET(inp, stcb, net, file, err)
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#endif
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/*
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* Local address and interface list handling
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*/
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#define SCTP_MAX_VRF_ID 0
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#define SCTP_SIZE_OF_VRF_HASH 3
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#define SCTP_IFNAMSIZ IFNAMSIZ
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#define SCTP_DEFAULT_VRFID 0
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#define SCTP_VRF_ADDR_HASH_SIZE 16
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#define SCTP_VRF_IFN_HASH_SIZE 3
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#define SCTP_INIT_VRF_TABLEID(vrf)
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#define SCTP_IFN_IS_IFT_LOOP(ifn) ((ifn)->ifn_type == IFT_LOOP)
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#define SCTP_ROUTE_IS_REAL_LOOP(ro) ((ro)->ro_rt && (ro)->ro_rt->rt_ifa && (ro)->ro_rt->rt_ifa->ifa_ifp && (ro)->ro_rt->rt_ifa->ifa_ifp->if_type == IFT_LOOP)
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/*
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* Access to IFN's to help with src-addr-selection
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*/
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/* This could return VOID if the index works but for BSD we provide both. */
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#define SCTP_GET_IFN_VOID_FROM_ROUTE(ro) (void *)ro->ro_rt->rt_ifp
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#define SCTP_GET_IF_INDEX_FROM_ROUTE(ro) (ro)->ro_rt->rt_ifp->if_index
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#define SCTP_ROUTE_HAS_VALID_IFN(ro) ((ro)->ro_rt && (ro)->ro_rt->rt_ifp)
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/*
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* general memory allocation
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*/
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#define SCTP_MALLOC(var, type, size, name) \
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do { \
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var = (type)malloc(size, name, M_NOWAIT); \
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} while (0)
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#define SCTP_FREE(var, type) free(var, type)
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#define SCTP_MALLOC_SONAME(var, type, size) \
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do { \
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var = (type)malloc(size, M_SONAME, M_WAITOK | M_ZERO); \
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} while (0)
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#define SCTP_FREE_SONAME(var) free(var, M_SONAME)
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#define SCTP_PROCESS_STRUCT struct proc *
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/*
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* zone allocation functions
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*/
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#include <vm/uma.h>
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/* SCTP_ZONE_INIT: initialize the zone */
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typedef struct uma_zone *sctp_zone_t;
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#define UMA_ZFLAG_FULL 0x0020
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#define SCTP_ZONE_INIT(zone, name, size, number) { \
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zone = uma_zcreate(name, size, NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,\
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UMA_ZFLAG_FULL); \
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uma_zone_set_max(zone, number); \
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}
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#define SCTP_ZONE_DESTROY(zone) uma_zdestroy(zone)
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/* SCTP_ZONE_GET: allocate element from the zone */
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#define SCTP_ZONE_GET(zone, type) \
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(type *)uma_zalloc(zone, M_NOWAIT);
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/* SCTP_ZONE_FREE: free element from the zone */
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#define SCTP_ZONE_FREE(zone, element) \
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uma_zfree(zone, element);
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#define SCTP_HASH_INIT(size, hashmark) hashinit_flags(size, M_PCB, hashmark, HASH_NOWAIT)
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#define SCTP_HASH_FREE(table, hashmark) hashdestroy(table, M_PCB, hashmark)
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#define SCTP_M_COPYM m_copym
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/*
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* timers
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*/
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#include <sys/callout.h>
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typedef struct callout sctp_os_timer_t;
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#define SCTP_OS_TIMER_INIT(tmr) callout_init(tmr, 1)
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#define SCTP_OS_TIMER_START callout_reset
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#define SCTP_OS_TIMER_STOP callout_stop
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#define SCTP_OS_TIMER_STOP_DRAIN callout_drain
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#define SCTP_OS_TIMER_PENDING callout_pending
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#define SCTP_OS_TIMER_ACTIVE callout_active
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#define SCTP_OS_TIMER_DEACTIVATE callout_deactivate
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#define sctp_get_tick_count() (ticks)
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#define SCTP_UNUSED __attribute__((unused))
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/*
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* Functions
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*/
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/* Mbuf manipulation and access macros */
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#define SCTP_BUF_LEN(m) (m->m_len)
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#define SCTP_BUF_NEXT(m) (m->m_next)
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#define SCTP_BUF_NEXT_PKT(m) (m->m_nextpkt)
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#define SCTP_BUF_RESV_UF(m, size) m->m_data += size
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#define SCTP_BUF_AT(m, size) m->m_data + size
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#define SCTP_BUF_IS_EXTENDED(m) (m->m_flags & M_EXT)
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#define SCTP_BUF_EXTEND_SIZE(m) (m->m_ext.ext_size)
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#define SCTP_BUF_TYPE(m) (m->m_type)
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#define SCTP_BUF_RECVIF(m) (m->m_pkthdr.rcvif)
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#define SCTP_BUF_PREPEND M_PREPEND
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#define SCTP_ALIGN_TO_END(m, len) if(m->m_flags & M_PKTHDR) { \
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MH_ALIGN(m, len); \
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} else if ((m->m_flags & M_EXT) == 0) { \
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M_ALIGN(m, len); \
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}
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/* We make it so if you have up to 4 threads
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* writting based on the default size of
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* the packet log 65 k, that would be
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* 4 16k packets before we would hit
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* a problem.
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*/
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#define SCTP_PKTLOG_WRITERS_NEED_LOCK 3
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/*************************/
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/* MTU */
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/*************************/
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#define SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, af) ((struct ifnet *)ifn)->if_mtu
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#define SCTP_GATHER_MTU_FROM_ROUTE(sctp_ifa, sa, rt) ((rt != NULL) ? rt->rt_rmx.rmx_mtu : 0)
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#define SCTP_GATHER_MTU_FROM_INTFC(sctp_ifn) ((sctp_ifn->ifn_p != NULL) ? ((struct ifnet *)(sctp_ifn->ifn_p))->if_mtu : 0)
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#define SCTP_SET_MTU_OF_ROUTE(sa, rt, mtu) do { \
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if (rt != NULL) \
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rt->rt_rmx.rmx_mtu = mtu; \
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} while(0)
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/* (de-)register interface event notifications */
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#define SCTP_REGISTER_INTERFACE(ifhandle, af)
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#define SCTP_DEREGISTER_INTERFACE(ifhandle, af)
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/*************************/
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/* These are for logging */
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/*************************/
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/* return the base ext data pointer */
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#define SCTP_BUF_EXTEND_BASE(m) (m->m_ext.ext_buf)
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/* return the refcnt of the data pointer */
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#define SCTP_BUF_EXTEND_REFCNT(m) (*m->m_ext.ref_cnt)
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/* return any buffer related flags, this is
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* used beyond logging for apple only.
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*/
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#define SCTP_BUF_GET_FLAGS(m) (m->m_flags)
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/* For BSD this just accesses the M_PKTHDR length
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* so it operates on an mbuf with hdr flag. Other
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* O/S's may have seperate packet header and mbuf
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* chain pointers.. thus the macro.
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*/
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#define SCTP_HEADER_TO_CHAIN(m) (m)
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#define SCTP_DETACH_HEADER_FROM_CHAIN(m)
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#define SCTP_HEADER_LEN(m) (m->m_pkthdr.len)
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#define SCTP_GET_HEADER_FOR_OUTPUT(o_pak) 0
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#define SCTP_RELEASE_HEADER(m)
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#define SCTP_RELEASE_PKT(m) sctp_m_freem(m)
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#define SCTP_ENABLE_UDP_CSUM(m) do { \
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m->m_pkthdr.csum_flags = CSUM_UDP; \
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m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); \
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} while (0)
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#define SCTP_GET_PKT_VRFID(m, vrf_id) ((vrf_id = SCTP_DEFAULT_VRFID) != SCTP_DEFAULT_VRFID)
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/* Attach the chain of data into the sendable packet. */
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#define SCTP_ATTACH_CHAIN(pak, m, packet_length) do { \
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pak = m; \
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pak->m_pkthdr.len = packet_length; \
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} while(0)
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/* Other m_pkthdr type things */
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#define SCTP_IS_IT_BROADCAST(dst, m) ((m->m_flags & M_PKTHDR) ? in_broadcast(dst, m->m_pkthdr.rcvif) : 0)
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#define SCTP_IS_IT_LOOPBACK(m) ((m->m_flags & M_PKTHDR) && ((m->m_pkthdr.rcvif == NULL) || (m->m_pkthdr.rcvif->if_type == IFT_LOOP)))
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/* This converts any input packet header
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* into the chain of data holders, for BSD
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* its a NOP.
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*/
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/* Macro's for getting length from V6/V4 header */
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#define SCTP_GET_IPV4_LENGTH(iph) (iph->ip_len)
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#define SCTP_GET_IPV6_LENGTH(ip6) (ntohs(ip6->ip6_plen))
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|
|
|
/* get the v6 hop limit */
|
|
#define SCTP_GET_HLIM(inp, ro) in6_selecthlim((struct in6pcb *)&inp->ip_inp.inp, (ro ? (ro->ro_rt ? (ro->ro_rt->rt_ifp) : (NULL)) : (NULL)));
|
|
|
|
/* is the endpoint v6only? */
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|
#define SCTP_IPV6_V6ONLY(inp) (((struct inpcb *)inp)->inp_flags & IN6P_IPV6_V6ONLY)
|
|
/* is the socket non-blocking? */
|
|
#define SCTP_SO_IS_NBIO(so) ((so)->so_state & SS_NBIO)
|
|
#define SCTP_SET_SO_NBIO(so) ((so)->so_state |= SS_NBIO)
|
|
#define SCTP_CLEAR_SO_NBIO(so) ((so)->so_state &= ~SS_NBIO)
|
|
/* get the socket type */
|
|
#define SCTP_SO_TYPE(so) ((so)->so_type)
|
|
/* reserve sb space for a socket */
|
|
#define SCTP_SORESERVE(so, send, recv) soreserve(so, send, recv)
|
|
/* wakeup a socket */
|
|
#define SCTP_SOWAKEUP(so) wakeup(&(so)->so_timeo)
|
|
/* clear the socket buffer state */
|
|
#define SCTP_SB_CLEAR(sb) \
|
|
(sb).sb_cc = 0; \
|
|
(sb).sb_mb = NULL; \
|
|
(sb).sb_mbcnt = 0;
|
|
|
|
#define SCTP_SB_LIMIT_RCV(so) so->so_rcv.sb_hiwat
|
|
#define SCTP_SB_LIMIT_SND(so) so->so_snd.sb_hiwat
|
|
|
|
/*
|
|
* routes, output, etc.
|
|
*/
|
|
typedef struct route sctp_route_t;
|
|
typedef struct rtentry sctp_rtentry_t;
|
|
|
|
#define SCTP_RTALLOC(ro, vrf_id) rtalloc_ign((struct route *)ro, 0UL)
|
|
|
|
/* Future zero copy wakeup/send function */
|
|
#define SCTP_ZERO_COPY_EVENT(inp, so)
|
|
/* This is re-pulse ourselves for sendbuf */
|
|
#define SCTP_ZERO_COPY_SENDQ_EVENT(inp, so)
|
|
|
|
/*
|
|
* IP output routines
|
|
*/
|
|
#define SCTP_IP_OUTPUT(result, o_pak, ro, stcb, vrf_id) \
|
|
{ \
|
|
int o_flgs = 0; \
|
|
if (stcb && stcb->sctp_ep && stcb->sctp_ep->sctp_socket) { \
|
|
o_flgs = IP_RAWOUTPUT | (stcb->sctp_ep->sctp_socket->so_options & SO_DONTROUTE); \
|
|
} else { \
|
|
o_flgs = IP_RAWOUTPUT; \
|
|
} \
|
|
result = ip_output(o_pak, NULL, ro, o_flgs, 0, NULL); \
|
|
}
|
|
|
|
#define SCTP_IP6_OUTPUT(result, o_pak, ro, ifp, stcb, vrf_id) \
|
|
{ \
|
|
if (stcb && stcb->sctp_ep) \
|
|
result = ip6_output(o_pak, \
|
|
((struct in6pcb *)(stcb->sctp_ep))->in6p_outputopts, \
|
|
(ro), 0, 0, ifp, NULL); \
|
|
else \
|
|
result = ip6_output(o_pak, NULL, (ro), 0, 0, ifp, NULL); \
|
|
}
|
|
|
|
struct mbuf *
|
|
sctp_get_mbuf_for_msg(unsigned int space_needed,
|
|
int want_header, int how, int allonebuf, int type);
|
|
|
|
|
|
/*
|
|
* SCTP AUTH
|
|
*/
|
|
#define HAVE_SHA2
|
|
|
|
#define SCTP_READ_RANDOM(buf, len) read_random(buf, len)
|
|
|
|
#ifdef USE_SCTP_SHA1
|
|
#include <netinet/sctp_sha1.h>
|
|
#else
|
|
#include <crypto/sha1.h>
|
|
/* map standard crypto API names */
|
|
#define SHA1_Init SHA1Init
|
|
#define SHA1_Update SHA1Update
|
|
#define SHA1_Final(x,y) SHA1Final((caddr_t)x, y)
|
|
#endif
|
|
|
|
#if defined(HAVE_SHA2)
|
|
#include <crypto/sha2/sha2.h>
|
|
#endif
|
|
|
|
#include <sys/md5.h>
|
|
/* map standard crypto API names */
|
|
#define MD5_Init MD5Init
|
|
#define MD5_Update MD5Update
|
|
#define MD5_Final MD5Final
|
|
|
|
#endif
|
|
|
|
#define SCTP_DECREMENT_AND_CHECK_REFCOUNT(addr) (atomic_fetchadd_int(addr, -1) == 1)
|
|
#if defined(INVARIANTS)
|
|
#define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
|
|
{ \
|
|
int32_t oldval; \
|
|
oldval = atomic_fetchadd_int(addr, -val); \
|
|
if (oldval < val) { \
|
|
panic("Counter goes negative"); \
|
|
} \
|
|
}
|
|
#else
|
|
#define SCTP_SAVE_ATOMIC_DECREMENT(addr, val) \
|
|
{ \
|
|
int32_t oldval; \
|
|
oldval = atomic_fetchadd_int(addr, -val); \
|
|
if (oldval < val) { \
|
|
*addr = 0; \
|
|
} \
|
|
}
|
|
#endif
|