558 lines
16 KiB
C
558 lines
16 KiB
C
/*-
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* Copyright (c) 2001-2007, 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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/* $KAME: sctp_pcb.h,v 1.21 2005/07/16 01:18:47 suz Exp $ */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef __sctp_pcb_h__
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#define __sctp_pcb_h__
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#include <netinet/sctp_os.h>
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#include <netinet/sctp.h>
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#include <netinet/sctp_constants.h>
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LIST_HEAD(sctppcbhead, sctp_inpcb);
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LIST_HEAD(sctpasochead, sctp_tcb);
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LIST_HEAD(sctpladdr, sctp_laddr);
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LIST_HEAD(sctpvtaghead, sctp_tagblock);
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LIST_HEAD(sctp_vrflist, sctp_vrf);
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LIST_HEAD(sctp_ifnlist, sctp_ifn);
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LIST_HEAD(sctp_ifalist, sctp_ifa);
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TAILQ_HEAD(sctp_readhead, sctp_queued_to_read);
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TAILQ_HEAD(sctp_streamhead, sctp_stream_queue_pending);
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#include <netinet/sctp_structs.h>
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#include <netinet/sctp_auth.h>
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#define SCTP_PCBHASH_ALLADDR(port, mask) (port & mask)
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#define SCTP_PCBHASH_ASOC(tag, mask) (tag & mask)
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struct sctp_vrf {
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LIST_ENTRY(sctp_vrf) next_vrf;
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struct sctp_ifalist *vrf_addr_hash;
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struct sctp_ifnlist ifnlist;
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uint32_t vrf_id;
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uint32_t tbl_id_v4; /* default v4 table id */
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uint32_t tbl_id_v6; /* default v6 table id */
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uint32_t total_ifa_count;
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u_long vrf_addr_hashmark;
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uint32_t refcount;
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};
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struct sctp_ifn {
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struct sctp_ifalist ifalist;
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struct sctp_vrf *vrf;
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LIST_ENTRY(sctp_ifn) next_ifn;
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LIST_ENTRY(sctp_ifn) next_bucket;
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void *ifn_p; /* never access without appropriate lock */
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uint32_t ifn_mtu;
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uint32_t ifn_type;
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uint32_t ifn_index; /* shorthand way to look at ifn for reference */
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uint32_t refcount; /* number of reference held should be >=
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* ifa_count */
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uint32_t ifa_count; /* IFA's we hold (in our list - ifalist) */
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uint32_t num_v6; /* number of v6 addresses */
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uint32_t num_v4; /* number of v4 addresses */
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uint32_t registered_af; /* registered address family for i/f events */
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char ifn_name[SCTP_IFNAMSIZ];
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};
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/* SCTP local IFA flags */
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#define SCTP_ADDR_VALID 0x00000001 /* its up and active */
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#define SCTP_BEING_DELETED 0x00000002 /* being deleted, when
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* refcount = 0. Note that it
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* is pulled from the ifn list
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* and ifa_p is nulled right
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* away but it cannot be freed
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* until the last *net
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* pointing to it is deleted. */
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#define SCTP_ADDR_DEFER_USE 0x00000004 /* Hold off using this one */
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#define SCTP_ADDR_IFA_UNUSEABLE 0x00000008
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struct sctp_ifa {
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LIST_ENTRY(sctp_ifa) next_ifa;
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LIST_ENTRY(sctp_ifa) next_bucket;
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struct sctp_ifn *ifn_p; /* back pointer to parent ifn */
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void *ifa; /* pointer to ifa, needed for flag update for
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* that we MUST lock appropriate locks. This
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* is for V6. */
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union sctp_sockstore address;
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uint32_t refcount; /* number of folks refering to this */
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uint32_t flags;
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uint32_t localifa_flags;
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uint32_t vrf_id; /* vrf_id of this addr (for deleting) */
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uint8_t src_is_loop;
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uint8_t src_is_priv;
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uint8_t src_is_glob;
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uint8_t resv;
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};
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struct sctp_laddr {
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LIST_ENTRY(sctp_laddr) sctp_nxt_addr; /* next in list */
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struct sctp_ifa *ifa;
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uint32_t action; /* Used during asconf and adding if no-zero
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* src-addr selection will not consider this
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* address. */
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struct timeval start_time; /* time when this address was created */
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};
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struct sctp_block_entry {
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int error;
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};
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struct sctp_timewait {
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uint32_t tv_sec_at_expire; /* the seconds from boot to expire */
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uint32_t v_tag; /* the vtag that can not be reused */
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};
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struct sctp_tagblock {
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LIST_ENTRY(sctp_tagblock) sctp_nxt_tagblock;
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struct sctp_timewait vtag_block[SCTP_NUMBER_IN_VTAG_BLOCK];
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};
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struct sctp_epinfo {
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struct sctpasochead *sctp_asochash;
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u_long hashasocmark;
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struct sctppcbhead *sctp_ephash;
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u_long hashmark;
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struct sctpasochead *sctp_restarthash;
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u_long hashrestartmark;
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/*-
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* The TCP model represents a substantial overhead in that we get an
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* additional hash table to keep explicit connections in. The
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* listening TCP endpoint will exist in the usual ephash above and
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* accept only INIT's. It will be incapable of sending off an INIT.
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* When a dg arrives we must look in the normal ephash. If we find a
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* TCP endpoint that will tell us to go to the specific endpoint
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* hash and re-hash to find the right assoc/socket. If we find a UDP
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* model socket we then must complete the lookup. If this fails,
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* i.e. no association can be found then we must continue to see if
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* a sctp_peeloff()'d socket is in the tcpephash (a spun off socket
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* acts like a TCP model connected socket).
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*/
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struct sctppcbhead *sctp_tcpephash;
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u_long hashtcpmark;
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uint32_t hashtblsize;
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struct sctp_vrflist *sctp_vrfhash;
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u_long hashvrfmark;
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struct sctp_ifnlist *vrf_ifn_hash;
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u_long vrf_ifn_hashmark;
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struct sctppcbhead listhead;
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struct sctpladdr addr_wq;
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struct sctpiterators iteratorhead;
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/* ep zone info */
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sctp_zone_t ipi_zone_ep;
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sctp_zone_t ipi_zone_asoc;
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sctp_zone_t ipi_zone_laddr;
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sctp_zone_t ipi_zone_net;
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sctp_zone_t ipi_zone_chunk;
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sctp_zone_t ipi_zone_readq;
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sctp_zone_t ipi_zone_strmoq;
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struct mtx ipi_ep_mtx;
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struct mtx it_mtx;
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struct mtx ipi_iterator_wq_mtx;
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struct mtx ipi_addr_mtx;
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struct mtx ipi_pktlog_mtx;
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uint32_t ipi_count_ep;
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/* assoc/tcb zone info */
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uint32_t ipi_count_asoc;
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/* local addrlist zone info */
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uint32_t ipi_count_laddr;
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/* remote addrlist zone info */
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uint32_t ipi_count_raddr;
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/* chunk structure list for output */
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uint32_t ipi_count_chunk;
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/* socket queue zone info */
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uint32_t ipi_count_readq;
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/* socket queue zone info */
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uint32_t ipi_count_strmoq;
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/* Number of vrfs */
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uint32_t ipi_count_vrfs;
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/* Number of ifns */
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uint32_t ipi_count_ifns;
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/* Number of ifas */
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uint32_t ipi_count_ifas;
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/* system wide number of free chunks hanging around */
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uint32_t ipi_free_chunks;
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uint32_t ipi_free_strmoq;
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struct sctpvtaghead vtag_timewait[SCTP_STACK_VTAG_HASH_SIZE_A];
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/* address work queue handling */
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#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
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uint32_t iterator_running;
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SCTP_PROCESS_STRUCT thread_proc;
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#endif
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struct sctp_timer addr_wq_timer;
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};
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/*-
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* Here we have all the relevant information for each SCTP entity created. We
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* will need to modify this as approprate. We also need to figure out how to
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* access /dev/random.
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*/
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struct sctp_pcb {
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unsigned int time_of_secret_change; /* number of seconds from
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* timeval.tv_sec */
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uint32_t secret_key[SCTP_HOW_MANY_SECRETS][SCTP_NUMBER_OF_SECRETS];
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unsigned int size_of_a_cookie;
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unsigned int sctp_timeoutticks[SCTP_NUM_TMRS];
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unsigned int sctp_minrto;
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unsigned int sctp_maxrto;
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unsigned int initial_rto;
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int initial_init_rto_max;
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unsigned int sctp_sack_freq;
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uint32_t sctp_sws_sender;
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uint32_t sctp_sws_receiver;
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/* authentication related fields */
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struct sctp_keyhead shared_keys;
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sctp_auth_chklist_t *local_auth_chunks;
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sctp_hmaclist_t *local_hmacs;
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uint16_t default_keyid;
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/* various thresholds */
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/* Max times I will init at a guy */
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uint16_t max_init_times;
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/* Max times I will send before we consider someone dead */
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uint16_t max_send_times;
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uint16_t def_net_failure;
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/* number of streams to pre-open on a association */
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uint16_t pre_open_stream_count;
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uint16_t max_open_streams_intome;
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/* random number generator */
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uint32_t random_counter;
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uint8_t random_numbers[SCTP_SIGNATURE_ALOC_SIZE];
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uint8_t random_store[SCTP_SIGNATURE_ALOC_SIZE];
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/*
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* This timer is kept running per endpoint. When it fires it will
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* change the secret key. The default is once a hour
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*/
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struct sctp_timer signature_change;
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/* Zero copy full buffer timer */
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struct sctp_timer zero_copy_timer;
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/* Zero copy app to transport (sendq) read repulse timer */
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struct sctp_timer zero_copy_sendq_timer;
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int def_cookie_life;
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/* defaults to 0 */
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int auto_close_time;
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uint32_t initial_sequence_debug;
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uint32_t adaptation_layer_indicator;
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char store_at;
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uint8_t max_burst;
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char current_secret_number;
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char last_secret_number;
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};
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#ifndef SCTP_ALIGNMENT
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#define SCTP_ALIGNMENT 32
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#endif
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#ifndef SCTP_ALIGNM1
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#define SCTP_ALIGNM1 (SCTP_ALIGNMENT-1)
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#endif
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#define sctp_lport ip_inp.inp.inp_lport
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struct sctp_inpcb {
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/*-
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* put an inpcb in front of it all, kind of a waste but we need to
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* for compatability with all the other stuff.
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*/
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union {
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struct inpcb inp;
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char align[(sizeof(struct in6pcb) + SCTP_ALIGNM1) &
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~SCTP_ALIGNM1];
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} ip_inp;
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/* Socket buffer lock protects read_queue and of course sb_cc */
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struct sctp_readhead read_queue;
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LIST_ENTRY(sctp_inpcb) sctp_list; /* lists all endpoints */
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/* hash of all endpoints for model */
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LIST_ENTRY(sctp_inpcb) sctp_hash;
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/* count of local addresses bound, 0 if bound all */
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int laddr_count;
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/* list of addrs in use by the EP, NULL if bound-all */
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struct sctpladdr sctp_addr_list;
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/*
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* used for source address selection rotation when we are subset
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* bound
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*/
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struct sctp_laddr *next_addr_touse;
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/* back pointer to our socket */
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struct socket *sctp_socket;
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uint32_t sctp_flags; /* INP state flag set */
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uint32_t sctp_features; /* Feature flags */
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struct sctp_pcb sctp_ep;/* SCTP ep data */
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/* head of the hash of all associations */
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struct sctpasochead *sctp_tcbhash;
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u_long sctp_hashmark;
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/* head of the list of all associations */
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struct sctpasochead sctp_asoc_list;
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#ifdef SCTP_TRACK_FREED_ASOCS
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struct sctpasochead sctp_asoc_free_list;
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#endif
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struct sctp_iterator *inp_starting_point_for_iterator;
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uint32_t sctp_frag_point;
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uint32_t partial_delivery_point;
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uint32_t sctp_context;
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struct sctp_nonpad_sndrcvinfo def_send;
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/*-
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* These three are here for the sosend_dgram
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* (pkt, pkt_last and control).
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* routine. However, I don't think anyone in
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* the current FreeBSD kernel calls this. So
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* they are candidates with sctp_sendm for
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* de-supporting.
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*/
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struct mbuf *pkt, *pkt_last;
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struct mbuf *control;
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struct mtx inp_mtx;
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struct mtx inp_create_mtx;
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struct mtx inp_rdata_mtx;
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int32_t refcount;
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uint32_t def_vrf_id;
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uint32_t total_sends;
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uint32_t total_recvs;
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uint32_t last_abort_code;
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uint32_t total_nospaces;
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};
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struct sctp_tcb {
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struct socket *sctp_socket; /* back pointer to socket */
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struct sctp_inpcb *sctp_ep; /* back pointer to ep */
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LIST_ENTRY(sctp_tcb) sctp_tcbhash; /* next link in hash
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* table */
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LIST_ENTRY(sctp_tcb) sctp_tcblist; /* list of all of the
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* TCB's */
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LIST_ENTRY(sctp_tcb) sctp_tcbrestarhash; /* next link in restart
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* hash table */
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LIST_ENTRY(sctp_tcb) sctp_asocs; /* vtag hash list */
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struct sctp_block_entry *block_entry; /* pointer locked by socket
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* send buffer */
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struct sctp_association asoc;
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/*-
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* freed_by_sorcv_sincelast is protected by the sockbuf_lock NOT the
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* tcb_lock. Its special in this way to help avoid extra mutex calls
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* in the reading of data.
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*/
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uint32_t freed_by_sorcv_sincelast;
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uint32_t total_sends;
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uint32_t total_recvs;
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int freed_from_where;
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uint16_t rport; /* remote port in network format */
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uint16_t resv;
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struct mtx tcb_mtx;
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struct mtx tcb_send_mtx;
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};
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#include <netinet/sctp_lock_bsd.h>
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#if defined(_KERNEL)
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extern struct sctp_epinfo sctppcbinfo;
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int SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b);
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void sctp_fill_pcbinfo(struct sctp_pcbinfo *);
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struct sctp_ifn *
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sctp_find_ifn(void *ifn, uint32_t ifn_index);
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struct sctp_vrf *sctp_allocate_vrf(int vrfid);
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struct sctp_vrf *sctp_find_vrf(uint32_t vrfid);
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void sctp_free_vrf(struct sctp_vrf *vrf);
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struct sctp_ifa *
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sctp_add_addr_to_vrf(uint32_t vrfid,
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void *ifn, uint32_t ifn_index, uint32_t ifn_type,
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const char *if_name,
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void *ifa, struct sockaddr *addr, uint32_t ifa_flags,
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int dynamic_add);
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void sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu);
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void sctp_free_ifn(struct sctp_ifn *sctp_ifnp);
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void sctp_free_ifa(struct sctp_ifa *sctp_ifap);
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void
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sctp_del_addr_from_vrf(uint32_t vrfid, struct sockaddr *addr,
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uint32_t ifn_index);
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struct sctp_nets *sctp_findnet(struct sctp_tcb *, struct sockaddr *);
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struct sctp_inpcb *sctp_pcb_findep(struct sockaddr *, int, int, uint32_t);
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int
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sctp_inpcb_bind(struct socket *, struct sockaddr *, struct sctp_ifa *,
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struct thread *);
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struct sctp_tcb *
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sctp_findassociation_addr(struct mbuf *, int, int,
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struct sctphdr *, struct sctp_chunkhdr *, struct sctp_inpcb **,
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struct sctp_nets **, uint32_t vrf_id);
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struct sctp_tcb *
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sctp_findassociation_addr_sa(struct sockaddr *,
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struct sockaddr *, struct sctp_inpcb **, struct sctp_nets **, int, uint32_t);
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void
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sctp_move_pcb_and_assoc(struct sctp_inpcb *, struct sctp_inpcb *,
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struct sctp_tcb *);
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/*-
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* For this call ep_addr, the to is the destination endpoint address of the
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* peer (relative to outbound). The from field is only used if the TCP model
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* is enabled and helps distingush amongst the subset bound (non-boundall).
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* The TCP model MAY change the actual ep field, this is why it is passed.
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*/
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struct sctp_tcb *
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sctp_findassociation_ep_addr(struct sctp_inpcb **,
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struct sockaddr *, struct sctp_nets **, struct sockaddr *,
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struct sctp_tcb *);
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struct sctp_tcb *
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sctp_findassociation_ep_asocid(struct sctp_inpcb *,
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sctp_assoc_t, int);
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struct sctp_tcb *
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sctp_findassociation_ep_asconf(struct mbuf *, int, int,
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struct sctphdr *, struct sctp_inpcb **, struct sctp_nets **);
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int sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id);
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int sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id);
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void sctp_inpcb_free(struct sctp_inpcb *, int, int);
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struct sctp_tcb *
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sctp_aloc_assoc(struct sctp_inpcb *, struct sockaddr *,
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int, int *, uint32_t, uint32_t);
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int sctp_free_assoc(struct sctp_inpcb *, struct sctp_tcb *, int, int);
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void
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sctp_add_vtag_to_timewait(struct sctp_inpcb *, uint32_t, uint32_t);
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void sctp_add_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *, uint32_t);
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int sctp_insert_laddr(struct sctpladdr *, struct sctp_ifa *, uint32_t);
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void sctp_remove_laddr(struct sctp_laddr *);
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void sctp_del_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *);
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void sctp_set_initial_cc_param(struct sctp_tcb *, struct sctp_nets *net);
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int sctp_add_remote_addr(struct sctp_tcb *, struct sockaddr *, int, int);
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void sctp_remove_net(struct sctp_tcb *, struct sctp_nets *);
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int sctp_del_remote_addr(struct sctp_tcb *, struct sockaddr *);
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void sctp_pcb_init(void);
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void sctp_add_local_addr_assoc(struct sctp_tcb *, struct sctp_ifa *, int);
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void sctp_del_local_addr_assoc(struct sctp_tcb *, struct sctp_ifa *);
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int
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sctp_load_addresses_from_init(struct sctp_tcb *, struct mbuf *, int, int,
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int, struct sctphdr *, struct sockaddr *);
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int
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sctp_set_primary_addr(struct sctp_tcb *, struct sockaddr *,
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struct sctp_nets *);
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int sctp_is_vtag_good(struct sctp_inpcb *, uint32_t, struct timeval *);
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/* void sctp_drain(void); */
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int sctp_destination_is_reachable(struct sctp_tcb *, struct sockaddr *);
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/*-
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* Null in last arg inpcb indicate run on ALL ep's. Specific inp in last arg
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* indicates run on ONLY assoc's of the specified endpoint.
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*/
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int
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sctp_initiate_iterator(inp_func inpf,
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asoc_func af,
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inp_func inpe,
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uint32_t, uint32_t,
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uint32_t, void *,
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uint32_t,
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end_func ef,
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struct sctp_inpcb *,
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uint8_t co_off);
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#endif /* _KERNEL */
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#endif /* !__sctp_pcb_h__ */
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