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freebsd-dev/sys/netinet/sctp_pcb.h
Randall Stewart a5d547add3 1) Fixes on a number of different collision case LOR's. 
2) Fix all "magic numbers" to be constants.
3) A collision case that would generate two associations to
   the same peer due to a missing lock is fixed.
4) Added tracking of where timers are stopped.
Approved by:	gnn
2006-12-14 17:02:55 +00:00

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/*-
* Copyright (c) 2001-2006, 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_pcb.h,v 1.21 2005/07/16 01:18:47 suz Exp $ */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef __sctp_pcb_h__
#define __sctp_pcb_h__
/*
* We must have V6 so the size of the proto can be calculated. Otherwise we
* would not allocate enough for Net/Open BSD :-<
*/
#if defined(_KERNEL)
#include <net/pfil.h>
#endif
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/ip6protosw.h>
#include <netinet6/in6_var.h>
#include <netinet6/in6_pcb.h>
#ifndef in6pcb
#define in6pcb inpcb
#endif
#include <netinet/sctp.h>
#include <netinet/sctp_os.h>
#include <netinet/sctp_constants.h>
LIST_HEAD(sctppcbhead, sctp_inpcb);
LIST_HEAD(sctpasochead, sctp_tcb);
LIST_HEAD(sctpladdr, sctp_laddr);
LIST_HEAD(sctpvtaghead, sctp_tagblock);
TAILQ_HEAD(sctp_readhead, sctp_queued_to_read);
TAILQ_HEAD(sctp_streamhead, sctp_stream_queue_pending);
#include <netinet/sctp_structs.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctp_auth.h>
/*
* PCB flags (in sctp_flags bitmask)
*/
#define SCTP_PCB_FLAGS_UDPTYPE 0x00000001
#define SCTP_PCB_FLAGS_TCPTYPE 0x00000002
#define SCTP_PCB_FLAGS_BOUNDALL 0x00000004
#define SCTP_PCB_FLAGS_ACCEPTING 0x00000008
#define SCTP_PCB_FLAGS_UNBOUND 0x00000010
#define SCTP_PCB_FLAGS_CLOSE_IP 0x00040000
#define SCTP_PCB_FLAGS_WAS_CONNECTED 0x00080000
#define SCTP_PCB_FLAGS_WAS_ABORTED 0x00100000
/* TCP model support */
#define SCTP_PCB_FLAGS_CONNECTED 0x00200000
#define SCTP_PCB_FLAGS_IN_TCPPOOL 0x00400000
#define SCTP_PCB_FLAGS_DONT_WAKE 0x00800000
#define SCTP_PCB_FLAGS_WAKEOUTPUT 0x01000000
#define SCTP_PCB_FLAGS_WAKEINPUT 0x02000000
#define SCTP_PCB_FLAGS_BOUND_V6 0x04000000
#define SCTP_PCB_FLAGS_NEEDS_MAPPED_V4 0x08000000
#define SCTP_PCB_FLAGS_BLOCKING_IO 0x10000000
#define SCTP_PCB_FLAGS_SOCKET_GONE 0x20000000
#define SCTP_PCB_FLAGS_SOCKET_ALLGONE 0x40000000
/* flags to copy to new PCB */
#define SCTP_PCB_COPY_FLAGS 0x0e000004
/*
* PCB Features (in sctp_features bitmask)
*/
#define SCTP_PCB_FLAGS_EXT_RCVINFO 0x00000004
#define SCTP_PCB_FLAGS_DONOT_HEARTBEAT 0x00000008
#define SCTP_PCB_FLAGS_FRAG_INTERLEAVE 0x00000010
#define SCTP_PCB_FLAGS_DO_ASCONF 0x00000020
#define SCTP_PCB_FLAGS_AUTO_ASCONF 0x00000040
/* socket options */
#define SCTP_PCB_FLAGS_NODELAY 0x00000100
#define SCTP_PCB_FLAGS_AUTOCLOSE 0x00000200
#define SCTP_PCB_FLAGS_RECVDATAIOEVNT 0x00000400
#define SCTP_PCB_FLAGS_RECVASSOCEVNT 0x00000800
#define SCTP_PCB_FLAGS_RECVPADDREVNT 0x00001000
#define SCTP_PCB_FLAGS_RECVPEERERR 0x00002000
#define SCTP_PCB_FLAGS_RECVSENDFAILEVNT 0x00004000
#define SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT 0x00008000
#define SCTP_PCB_FLAGS_ADAPTATIONEVNT 0x00010000
#define SCTP_PCB_FLAGS_PDAPIEVNT 0x00020000
#define SCTP_PCB_FLAGS_AUTHEVNT 0x00040000
#define SCTP_PCB_FLAGS_STREAM_RESETEVNT 0x00080000
#define SCTP_PCB_FLAGS_NO_FRAGMENT 0x00100000
#define SCTP_PCB_FLAGS_EXPLICIT_EOR 0x00200000
#define SCTP_PCBHASH_ALLADDR(port, mask) (port & mask)
#define SCTP_PCBHASH_ASOC(tag, mask) (tag & mask)
struct sctp_laddr {
LIST_ENTRY(sctp_laddr) sctp_nxt_addr; /* next in list */
struct ifaddr *ifa;
int action; /* Only used in delayed asconf stuff */
};
struct sctp_block_entry {
int error;
};
struct sctp_timewait {
uint32_t tv_sec_at_expire; /* the seconds from boot to expire */
uint32_t v_tag; /* the vtag that can not be reused */
};
struct sctp_tagblock {
LIST_ENTRY(sctp_tagblock) sctp_nxt_tagblock;
struct sctp_timewait vtag_block[SCTP_NUMBER_IN_VTAG_BLOCK];
};
struct sctp_epinfo {
struct sctpasochead *sctp_asochash;
u_long hashasocmark;
struct sctppcbhead *sctp_ephash;
u_long hashmark;
struct sctpasochead *sctp_restarthash;
u_long hashrestartmark;
/*
* The TCP model represents a substantial overhead in that we get an
* additional hash table to keep explicit connections in. The
* listening TCP endpoint will exist in the usual ephash above and
* accept only INIT's. It will be incapable of sending off an INIT.
* When a dg arrives we must look in the normal ephash. If we find a
* TCP endpoint that will tell us to go to the specific endpoint
* hash and re-hash to find the right assoc/socket. If we find a UDP
* model socket we then must complete the lookup. If this fails,
* i.e. no association can be found then we must continue to see if
* a sctp_peeloff()'d socket is in the tcpephash (a spun off socket
* acts like a TCP model connected socket).
*/
struct sctppcbhead *sctp_tcpephash;
u_long hashtcpmark;
uint32_t hashtblsize;
struct sctppcbhead listhead;
struct sctpladdr addr_wq;
struct sctpiterators iteratorhead;
/* ep zone info */
sctp_zone_t ipi_zone_ep;
sctp_zone_t ipi_zone_asoc;
sctp_zone_t ipi_zone_laddr;
sctp_zone_t ipi_zone_net;
sctp_zone_t ipi_zone_chunk;
sctp_zone_t ipi_zone_readq;
sctp_zone_t ipi_zone_strmoq;
struct mtx ipi_ep_mtx;
struct mtx it_mtx;
struct mtx ipi_addr_mtx;
struct mtx timer_mtx;
uint32_t ipi_count_ep;
/* assoc/tcb zone info */
uint32_t ipi_count_asoc;
/* local addrlist zone info */
uint32_t ipi_count_laddr;
/* remote addrlist zone info */
uint32_t ipi_count_raddr;
/* chunk structure list for output */
uint32_t ipi_count_chunk;
/* socket queue zone info */
uint32_t ipi_count_readq;
/* socket queue zone info */
uint32_t ipi_count_strmoq;
/* system wide number of free chunks hanging around */
uint32_t ipi_free_chunks;
uint32_t ipi_free_strmoq;
struct sctpvtaghead vtag_timewait[SCTP_STACK_VTAG_HASH_SIZE];
struct sctp_timer addr_wq_timer;
/* for port allocations */
uint16_t lastport;
uint16_t lastlow;
uint16_t lasthi;
};
extern struct sctpstat sctpstat;
/*
* Here we have all the relevant information for each SCTP entity created. We
* will need to modify this as approprate. We also need to figure out how to
* access /dev/random.
*/
struct sctp_pcb {
unsigned int time_of_secret_change; /* number of seconds from
* timeval.tv_sec */
uint32_t secret_key[SCTP_HOW_MANY_SECRETS][SCTP_NUMBER_OF_SECRETS];
unsigned int size_of_a_cookie;
unsigned int sctp_timeoutticks[SCTP_NUM_TMRS];
unsigned int sctp_minrto;
unsigned int sctp_maxrto;
unsigned int initial_rto;
int initial_init_rto_max;
uint32_t sctp_sws_sender;
uint32_t sctp_sws_receiver;
/* authentication related fields */
struct sctp_keyhead shared_keys;
sctp_auth_chklist_t *local_auth_chunks;
sctp_hmaclist_t *local_hmacs;
uint16_t default_keyid;
/* various thresholds */
/* Max times I will init at a guy */
uint16_t max_init_times;
/* Max times I will send before we consider someone dead */
uint16_t max_send_times;
uint16_t def_net_failure;
/* number of streams to pre-open on a association */
uint16_t pre_open_stream_count;
uint16_t max_open_streams_intome;
/* random number generator */
uint32_t random_counter;
uint8_t random_numbers[SCTP_SIGNATURE_ALOC_SIZE];
uint8_t random_store[SCTP_SIGNATURE_ALOC_SIZE];
/*
* This timer is kept running per endpoint. When it fires it will
* change the secret key. The default is once a hour
*/
struct sctp_timer signature_change;
int def_cookie_life;
/* defaults to 0 */
int auto_close_time;
uint32_t initial_sequence_debug;
uint32_t adaptation_layer_indicator;
char store_at;
uint8_t max_burst;
char current_secret_number;
char last_secret_number;
};
#ifndef SCTP_ALIGNMENT
#define SCTP_ALIGNMENT 32
#endif
#ifndef SCTP_ALIGNM1
#define SCTP_ALIGNM1 (SCTP_ALIGNMENT-1)
#endif
#define sctp_lport ip_inp.inp.inp_lport
struct sctp_inpcb {
/*
* put an inpcb in front of it all, kind of a waste but we need to
* for compatability with all the other stuff.
*/
union {
struct inpcb inp;
char align[(sizeof(struct in6pcb) + SCTP_ALIGNM1) &
~SCTP_ALIGNM1];
} ip_inp;
/* Socket buffer lock protects read_queue and of course sb_cc */
struct sctp_readhead read_queue;
LIST_ENTRY(sctp_inpcb) sctp_list; /* lists all endpoints */
/* hash of all endpoints for model */
LIST_ENTRY(sctp_inpcb) sctp_hash;
/* count of local addresses bound, 0 if bound all */
int laddr_count;
/* list of addrs in use by the EP */
struct sctpladdr sctp_addr_list;
/* used for source address selection rotation */
struct sctp_laddr *next_addr_touse;
struct ifnet *next_ifn_touse;
/* back pointer to our socket */
struct socket *sctp_socket;
uint32_t sctp_flags; /* INP state flag set */
uint32_t sctp_features; /* Feature flags */
struct sctp_pcb sctp_ep;/* SCTP ep data */
/* head of the hash of all associations */
struct sctpasochead *sctp_tcbhash;
u_long sctp_hashmark;
/* head of the list of all associations */
struct sctpasochead sctp_asoc_list;
#ifdef SCTP_TRACK_FREED_ASOCS
struct sctpasochead sctp_asoc_free_list;
#endif
struct sctp_iterator *inp_starting_point_for_iterator;
uint32_t sctp_frag_point;
uint32_t partial_delivery_point;
uint32_t sctp_context;
struct sctp_sndrcvinfo def_send;
/*
* These three are here for the sosend_dgram (pkt, pkt_last and
* control). routine. However, I don't think anyone in the current
* FreeBSD kernel calls this. So they are candidates with sctp_sendm
* for de-supporting.
*/
struct mbuf *pkt, *pkt_last;
struct mbuf *control;
struct mtx inp_mtx;
struct mtx inp_create_mtx;
struct mtx inp_rdata_mtx;
int32_t refcount;
uint32_t total_sends;
uint32_t total_recvs;
uint32_t last_abort_code;
uint32_t total_nospaces;
};
struct sctp_tcb {
struct socket *sctp_socket; /* back pointer to socket */
struct sctp_inpcb *sctp_ep; /* back pointer to ep */
LIST_ENTRY(sctp_tcb) sctp_tcbhash; /* next link in hash
* table */
LIST_ENTRY(sctp_tcb) sctp_tcblist; /* list of all of the
* TCB's */
LIST_ENTRY(sctp_tcb) sctp_tcbrestarhash; /* next link in restart
* hash table */
LIST_ENTRY(sctp_tcb) sctp_asocs; /* vtag hash list */
struct sctp_block_entry *block_entry; /* pointer locked by socket
* send buffer */
struct sctp_association asoc;
/*
* freed_by_sorcv_sincelast is protected by the sockbuf_lock NOT the
* tcb_lock. Its special in this way to help avoid extra mutex calls
* in the reading of data.
*/
uint32_t freed_by_sorcv_sincelast;
uint32_t total_sends;
uint32_t total_recvs;
int freed_from_where;
uint16_t rport; /* remote port in network format */
uint16_t resv;
struct mtx tcb_mtx;
struct mtx tcb_send_mtx;
};
#include <netinet/sctp_lock_bsd.h>
#if defined(_KERNEL)
extern struct sctp_epinfo sctppcbinfo;
extern int sctp_auto_asconf;
int SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b);
void sctp_fill_pcbinfo(struct sctp_pcbinfo *);
struct sctp_nets *sctp_findnet(struct sctp_tcb *, struct sockaddr *);
struct sctp_inpcb *sctp_pcb_findep(struct sockaddr *, int, int);
int sctp_inpcb_bind(struct socket *, struct sockaddr *, struct thread *);
struct sctp_tcb *
sctp_findassociation_addr(struct mbuf *, int, int,
struct sctphdr *, struct sctp_chunkhdr *, struct sctp_inpcb **,
struct sctp_nets **);
struct sctp_tcb *
sctp_findassociation_addr_sa(struct sockaddr *,
struct sockaddr *, struct sctp_inpcb **, struct sctp_nets **, int);
void
sctp_move_pcb_and_assoc(struct sctp_inpcb *, struct sctp_inpcb *,
struct sctp_tcb *);
/*
* For this call ep_addr, the to is the destination endpoint address of the
* peer (relative to outbound). The from field is only used if the TCP model
* is enabled and helps distingush amongst the subset bound (non-boundall).
* The TCP model MAY change the actual ep field, this is why it is passed.
*/
struct sctp_tcb *
sctp_findassociation_ep_addr(struct sctp_inpcb **,
struct sockaddr *, struct sctp_nets **, struct sockaddr *,
struct sctp_tcb *);
struct sctp_tcb *
sctp_findassociation_ep_asocid(struct sctp_inpcb *,
sctp_assoc_t, int);
struct sctp_tcb *
sctp_findassociation_ep_asconf(struct mbuf *, int, int,
struct sctphdr *, struct sctp_inpcb **, struct sctp_nets **);
int sctp_inpcb_alloc(struct socket *);
int sctp_is_address_on_local_host(struct sockaddr *addr);
void sctp_inpcb_free(struct sctp_inpcb *, int, int);
struct sctp_tcb *
sctp_aloc_assoc(struct sctp_inpcb *, struct sockaddr *,
int, int *, uint32_t);
int sctp_free_assoc(struct sctp_inpcb *, struct sctp_tcb *, int, int);
int sctp_add_local_addr_ep(struct sctp_inpcb *, struct ifaddr *);
int sctp_insert_laddr(struct sctpladdr *, struct ifaddr *);
void sctp_remove_laddr(struct sctp_laddr *);
int sctp_del_local_addr_ep(struct sctp_inpcb *, struct ifaddr *);
int sctp_del_local_addr_ep_sa(struct sctp_inpcb *, struct sockaddr *);
int sctp_add_remote_addr(struct sctp_tcb *, struct sockaddr *, int, int);
void sctp_remove_net(struct sctp_tcb *, struct sctp_nets *);
int sctp_del_remote_addr(struct sctp_tcb *, struct sockaddr *);
void sctp_pcb_init(void);
int sctp_add_local_addr_assoc(struct sctp_tcb *, struct ifaddr *);
int sctp_del_local_addr_assoc(struct sctp_tcb *, struct ifaddr *);
int sctp_del_local_addr_assoc_sa(struct sctp_tcb *, struct sockaddr *);
int
sctp_load_addresses_from_init(struct sctp_tcb *, struct mbuf *, int, int,
int, struct sctphdr *, struct sockaddr *);
int
sctp_set_primary_addr(struct sctp_tcb *, struct sockaddr *,
struct sctp_nets *);
int sctp_is_vtag_good(struct sctp_inpcb *, uint32_t, struct timeval *);
/* void sctp_drain(void); */
int sctp_destination_is_reachable(struct sctp_tcb *, struct sockaddr *);
/*
* Null in last arg inpcb indicate run on ALL ep's. Specific inp in last arg
* indicates run on ONLY assoc's of the specified endpoint.
*/
int
sctp_initiate_iterator(inp_func inpf, asoc_func af, uint32_t, uint32_t,
uint32_t, void *, uint32_t, end_func ef, struct sctp_inpcb *, uint8_t co_off);
#endif /* _KERNEL */
#endif /* !__sctp_pcb_h__ */
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