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f0aa484471
freebsd-dev/sys/netinet/sctp_header.h
Randall Stewart c4739e2f47 - Fix address add handling to clear cached routes and source addresses 
when peer acks the add in case the routing table changes.
- Fix sctp_lower_sosend to send shutdown chunk for mbuf send
  case when sndlen = 0 and sinfoflag = SCTP_EOF
- Fix sctp_lower_sosend for SCTP_ABORT mbuf send case with null data,
  So that it does not send the "null" data mbuf out and cause
  it to get freed twice.
- Fix so auto-asconf sysctl actually effect the socket's asconf state.
- Do not allow SCTP_AUTO_ASCONF option to be used on subset bound sockets.
- Memset bug in sctp_output.c (arguments were reversed) submitted
  found and reported by Dave Jones (davej@codemonkey.org.uk).
- PD-API point needs to be invoked >= not just > to conform to socket api
  draft this fixes sctp_indata.c in the two places need to be >=.
- move M_NOTIFICATION to use M_PROTO5.
- PEER_ADDR_PARAMS did not fail properly if you specify an address
  that is not in the association with a valid assoc_id. This meant
  you got or set the stcb level values instead of the destination
  you thought you were going to get/set. Now validate if the
  stcb is non-null and the net is NULL that the sa_family is
  set and the address is unspecified otherwise return an error.
- The thread based iterator could crash if associations were freed
  at the exact time it was running. rework the worker thread to
  use the increment/decrement to prevent this and no longer use
  the markers that the timer based iterator uses.
- Fix the memleak in sctp_add_addr_to_vrf() for the case when it is
  detected that ifa is already pointing to a ifn.
- Fix it so that if someone is so insane that they drop the
  send window below the minimal add mark, they still can send.
- Changed all state for associations to use mask safe macro.
- During front states in association freeing in sctp_inpcbfree, we
  had a locking problem where locks were not in place where they
  should have been.
- Free association calls were not testing the return value in
  sctp_inpcb_free() properly... others should be cast  void returns
  where we don't care about the return value.
- If a reference count is held on an assoc, even from the "force free"
  we should not do the actual free.. but instead let the timer
  free it.
- When we enter sctp_input(), if the SCTP_ASOC_ABOUT_TO_BE_FREED
  flag is set, we must NOT process the packet but handle it like
  ootb. This is because while freeing an assoc we release the
  locks to get all the higher order locks so we can purge all
  the hash tables. This leaves a hole if a packet comes in
  just at that point. Now sctp_common_input_processing() will
  call the ootb code in such a case.
- Change MBUF M_NOTIFICATION to use M_PROTO5 (per Sam L). This makes
  it so we don't have a conflict (I think this is a covertity change).
  We made this change AFTER some conversation and looking to make sure
  that M_PROTO5 does not have a problem between SCTP and the 802.11
  stuff (which is the only other place its used).
- Fixed lock order reversal and missing atomic protection around
  locked_tcb during association lookup and the 1-2-1 model.
- Added debug to source address selection.
- V6 output must always do checksum even for loopback.
- Remove more locks around inp that are not needed for an atomically
  added/subtracted ref count.
- slight optimization in the way we zero the array in sctp_sack_check()
- It was possible to respond to a ABORT() with bad checksum with
  a PKT-DROP. This lead to a PKT-DROP/ABORT war. Add code to NOT
  send a PKT-DROP to any ABORT().
- Add an option for local logging (useful for macintosh or when
  you need better performing during debugging). Note no commands
  are here to get the log info, you must just use kgdb.
- The timer code needs to be aware of if it needs to call
  sctp_sack_check() to slide the maps and adjust the cum-ack.
  This is because it may be out of sync cum-ack wise.
- Added threshold managment logging.
- If the user picked just the right size, that just filled the send
  window minus one mtu, we would enter a forever loop not copying and
  at the same time not blocking. Change from < to <= solves this.
- Sysctl added to control the fragment interleave level which defaults
  to 1.
- My rwnd control was not being used to control the rwnd properly (we
  did not add and subtract to it :-() this is now fixed so we handle
  small messages (1 byte etc) better to bring our rwnd down more
  slowly.

Approved by:	re@freebsd.org (Bruce Mah)
2007-08-24 00:53:53 +00:00

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/*-
* Copyright (c) 2001-2007, by 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_header.h,v 1.14 2005/03/06 16:04:17 itojun Exp $ */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef __sctp_header_h__
#define __sctp_header_h__
#include <sys/time.h>
#include <netinet/sctp.h>
#include <netinet/sctp_constants.h>
/*
* Parameter structures
*/
struct sctp_ipv4addr_param {
struct sctp_paramhdr ph;/* type=SCTP_IPV4_PARAM_TYPE, len=8 */
uint32_t addr; /* IPV4 address */
} SCTP_PACKED;
#define SCTP_V6_ADDR_BYTES 16
struct sctp_ipv6addr_param {
struct sctp_paramhdr ph;/* type=SCTP_IPV6_PARAM_TYPE, len=20 */
uint8_t addr[SCTP_V6_ADDR_BYTES]; /* IPV6 address */
} SCTP_PACKED;
/* Cookie Preservative */
struct sctp_cookie_perserve_param {
struct sctp_paramhdr ph;/* type=SCTP_COOKIE_PRESERVE, len=8 */
uint32_t time; /* time in ms to extend cookie */
};
#define SCTP_ARRAY_MIN_LEN 1
/* Host Name Address */
struct sctp_host_name_param {
struct sctp_paramhdr ph;/* type=SCTP_HOSTNAME_ADDRESS */
char name[SCTP_ARRAY_MIN_LEN]; /* host name */
} SCTP_PACKED;
/*
* This is the maximum padded size of a s-a-p
* so paramheadr + 3 address types (6 bytes) + 2 byte pad = 12
*/
#define SCTP_MAX_ADDR_PARAMS_SIZE 12
/* supported address type */
struct sctp_supported_addr_param {
struct sctp_paramhdr ph;/* type=SCTP_SUPPORTED_ADDRTYPE */
uint16_t addr_type[SCTP_ARRAY_MIN_LEN]; /* array of supported address
* types */
} SCTP_PACKED;
/* ECN parameter */
struct sctp_ecn_supported_param {
struct sctp_paramhdr ph;/* type=SCTP_ECN_CAPABLE */
} SCTP_PACKED;
/* heartbeat info parameter */
struct sctp_heartbeat_info_param {
struct sctp_paramhdr ph;
uint32_t time_value_1;
uint32_t time_value_2;
uint32_t random_value1;
uint32_t random_value2;
uint16_t user_req;
uint8_t addr_family;
uint8_t addr_len;
char address[SCTP_ADDRMAX];
} SCTP_PACKED;
/* draft-ietf-tsvwg-prsctp */
/* PR-SCTP supported parameter */
struct sctp_prsctp_supported_param {
struct sctp_paramhdr ph;
} SCTP_PACKED;
/* draft-ietf-tsvwg-addip-sctp */
struct sctp_asconf_paramhdr { /* an ASCONF "parameter" */
struct sctp_paramhdr ph;/* a SCTP parameter header */
uint32_t correlation_id;/* correlation id for this param */
} SCTP_PACKED;
struct sctp_asconf_addr_param { /* an ASCONF address parameter */
struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
struct sctp_ipv6addr_param addrp; /* max storage size */
} SCTP_PACKED;
struct sctp_asconf_addrv4_param { /* an ASCONF address (v4) parameter */
struct sctp_asconf_paramhdr aph; /* asconf "parameter" */
struct sctp_ipv4addr_param addrp; /* max storage size */
} SCTP_PACKED;
#define SCTP_MAX_SUPPORTED_EXT 256
struct sctp_supported_chunk_types_param {
struct sctp_paramhdr ph;/* type = 0x8008 len = x */
uint8_t chunk_types[0];
} SCTP_PACKED;
/* ECN Nonce: draft-ladha-sctp-ecn-nonce */
struct sctp_ecn_nonce_supported_param {
struct sctp_paramhdr ph;/* type = 0x8001 len = 4 */
} SCTP_PACKED;
/*
* Structures for DATA chunks
*/
struct sctp_data {
uint32_t tsn;
uint16_t stream_id;
uint16_t stream_sequence;
uint32_t protocol_id;
/* user data follows */
} SCTP_PACKED;
struct sctp_data_chunk {
struct sctp_chunkhdr ch;
struct sctp_data dp;
} SCTP_PACKED;
/*
* Structures for the control chunks
*/
/* Initiate (INIT)/Initiate Ack (INIT ACK) */
struct sctp_init {
uint32_t initiate_tag; /* initiate tag */
uint32_t a_rwnd; /* a_rwnd */
uint16_t num_outbound_streams; /* OS */
uint16_t num_inbound_streams; /* MIS */
uint32_t initial_tsn; /* I-TSN */
/* optional param's follow */
} SCTP_PACKED;
#define SCTP_IDENTIFICATION_SIZE 16
#define SCTP_ADDRESS_SIZE 4
#define SCTP_RESERVE_SPACE 6
/* state cookie header */
struct sctp_state_cookie { /* this is our definition... */
uint8_t identification[SCTP_IDENTIFICATION_SIZE]; /* id of who we are */
struct timeval time_entered; /* the time I built cookie */
uint32_t cookie_life; /* life I will award this cookie */
uint32_t tie_tag_my_vtag; /* my tag in old association */
uint32_t tie_tag_peer_vtag; /* peers tag in old association */
uint32_t peers_vtag; /* peers tag in INIT (for quick ref) */
uint32_t my_vtag; /* my tag in INIT-ACK (for quick ref) */
uint32_t address[SCTP_ADDRESS_SIZE]; /* 4 ints/128 bits */
uint32_t addr_type; /* address type */
uint32_t laddress[SCTP_ADDRESS_SIZE]; /* my local from address */
uint32_t laddr_type; /* my local from address type */
uint32_t scope_id; /* v6 scope id for link-locals */
uint16_t peerport; /* port address of the peer in the INIT */
uint16_t myport; /* my port address used in the INIT */
uint8_t ipv4_addr_legal;/* Are V4 addr legal? */
uint8_t ipv6_addr_legal;/* Are V6 addr legal? */
uint8_t local_scope; /* IPv6 local scope flag */
uint8_t site_scope; /* IPv6 site scope flag */
uint8_t ipv4_scope; /* IPv4 private addr scope */
uint8_t loopback_scope; /* loopback scope information */
uint8_t reserved[SCTP_RESERVE_SPACE]; /* Align to 64 bits */
/*
* at the end is tacked on the INIT chunk and the INIT-ACK chunk
* (minus the cookie).
*/
} SCTP_PACKED;
struct sctp_inv_mandatory_param {
uint16_t cause;
uint16_t length;
uint32_t num_param;
uint16_t param;
/*
* We include this to 0 it since only a missing cookie will cause
* this error.
*/
uint16_t resv;
} SCTP_PACKED;
struct sctp_unresolv_addr {
uint16_t cause;
uint16_t length;
uint16_t addr_type;
uint16_t reserved; /* Only one invalid addr type */
} SCTP_PACKED;
/* state cookie parameter */
struct sctp_state_cookie_param {
struct sctp_paramhdr ph;
struct sctp_state_cookie cookie;
} SCTP_PACKED;
struct sctp_init_chunk {
struct sctp_chunkhdr ch;
struct sctp_init init;
} SCTP_PACKED;
struct sctp_init_msg {
struct sctphdr sh;
struct sctp_init_chunk msg;
} SCTP_PACKED;
/* ... used for both INIT and INIT ACK */
#define sctp_init_ack sctp_init
#define sctp_init_ack_chunk sctp_init_chunk
#define sctp_init_ack_msg sctp_init_msg
/* Selective Ack (SACK) */
struct sctp_gap_ack_block {
uint16_t start; /* Gap Ack block start */
uint16_t end; /* Gap Ack block end */
} SCTP_PACKED;
struct sctp_sack {
uint32_t cum_tsn_ack; /* cumulative TSN Ack */
uint32_t a_rwnd; /* updated a_rwnd of sender */
uint16_t num_gap_ack_blks; /* number of Gap Ack blocks */
uint16_t num_dup_tsns; /* number of duplicate TSNs */
/* struct sctp_gap_ack_block's follow */
/* uint32_t duplicate_tsn's follow */
} SCTP_PACKED;
struct sctp_sack_chunk {
struct sctp_chunkhdr ch;
struct sctp_sack sack;
} SCTP_PACKED;
/* Heartbeat Request (HEARTBEAT) */
struct sctp_heartbeat {
struct sctp_heartbeat_info_param hb_info;
} SCTP_PACKED;
struct sctp_heartbeat_chunk {
struct sctp_chunkhdr ch;
struct sctp_heartbeat heartbeat;
} SCTP_PACKED;
/* ... used for Heartbeat Ack (HEARTBEAT ACK) */
#define sctp_heartbeat_ack sctp_heartbeat
#define sctp_heartbeat_ack_chunk sctp_heartbeat_chunk
/* Abort Asssociation (ABORT) */
struct sctp_abort_chunk {
struct sctp_chunkhdr ch;
/* optional error cause may follow */
} SCTP_PACKED;
struct sctp_abort_msg {
struct sctphdr sh;
struct sctp_abort_chunk msg;
} SCTP_PACKED;
/* Shutdown Association (SHUTDOWN) */
struct sctp_shutdown_chunk {
struct sctp_chunkhdr ch;
uint32_t cumulative_tsn_ack;
} SCTP_PACKED;
/* Shutdown Acknowledgment (SHUTDOWN ACK) */
struct sctp_shutdown_ack_chunk {
struct sctp_chunkhdr ch;
} SCTP_PACKED;
/* Operation Error (ERROR) */
struct sctp_error_chunk {
struct sctp_chunkhdr ch;
/* optional error causes follow */
} SCTP_PACKED;
/* Cookie Echo (COOKIE ECHO) */
struct sctp_cookie_echo_chunk {
struct sctp_chunkhdr ch;
struct sctp_state_cookie cookie;
} SCTP_PACKED;
/* Cookie Acknowledgment (COOKIE ACK) */
struct sctp_cookie_ack_chunk {
struct sctp_chunkhdr ch;
} SCTP_PACKED;
/* Explicit Congestion Notification Echo (ECNE) */
struct sctp_ecne_chunk {
struct sctp_chunkhdr ch;
uint32_t tsn;
} SCTP_PACKED;
/* Congestion Window Reduced (CWR) */
struct sctp_cwr_chunk {
struct sctp_chunkhdr ch;
uint32_t tsn;
} SCTP_PACKED;
/* Shutdown Complete (SHUTDOWN COMPLETE) */
struct sctp_shutdown_complete_chunk {
struct sctp_chunkhdr ch;
} SCTP_PACKED;
/* Oper error holding a stale cookie */
struct sctp_stale_cookie_msg {
struct sctp_paramhdr ph;/* really an error cause */
uint32_t time_usec;
} SCTP_PACKED;
struct sctp_adaptation_layer_indication {
struct sctp_paramhdr ph;
uint32_t indication;
} SCTP_PACKED;
struct sctp_cookie_while_shutting_down {
struct sctphdr sh;
struct sctp_chunkhdr ch;
struct sctp_paramhdr ph;/* really an error cause */
} SCTP_PACKED;
struct sctp_shutdown_complete_msg {
struct sctphdr sh;
struct sctp_shutdown_complete_chunk shut_cmp;
} SCTP_PACKED;
/*
* draft-ietf-tsvwg-addip-sctp
*/
/* Address/Stream Configuration Change (ASCONF) */
struct sctp_asconf_chunk {
struct sctp_chunkhdr ch;
uint32_t serial_number;
/* lookup address parameter (mandatory) */
/* asconf parameters follow */
} SCTP_PACKED;
/* Address/Stream Configuration Acknowledge (ASCONF ACK) */
struct sctp_asconf_ack_chunk {
struct sctp_chunkhdr ch;
uint32_t serial_number;
/* asconf parameters follow */
} SCTP_PACKED;
/* draft-ietf-tsvwg-prsctp */
/* Forward Cumulative TSN (FORWARD TSN) */
struct sctp_forward_tsn_chunk {
struct sctp_chunkhdr ch;
uint32_t new_cumulative_tsn;
/* stream/sequence pairs (sctp_strseq) follow */
} SCTP_PACKED;
struct sctp_strseq {
uint16_t stream;
uint16_t sequence;
} SCTP_PACKED;
struct sctp_forward_tsn_msg {
struct sctphdr sh;
struct sctp_forward_tsn_chunk msg;
} SCTP_PACKED;
/* should be a multiple of 4 - 1 aka 3/7/11 etc. */
#define SCTP_NUM_DB_TO_VERIFY 31
struct sctp_chunk_desc {
uint8_t chunk_type;
uint8_t data_bytes[SCTP_NUM_DB_TO_VERIFY];
uint32_t tsn_ifany;
} SCTP_PACKED;
struct sctp_pktdrop_chunk {
struct sctp_chunkhdr ch;
uint32_t bottle_bw;
uint32_t current_onq;
uint16_t trunc_len;
uint16_t reserved;
uint8_t data[0];
} SCTP_PACKED;
/**********STREAM RESET STUFF ******************/
struct sctp_stream_reset_out_request {
struct sctp_paramhdr ph;
uint32_t request_seq; /* monotonically increasing seq no */
uint32_t response_seq; /* if a response, the resp seq no */
uint32_t send_reset_at_tsn; /* last TSN I assigned outbound */
uint16_t list_of_streams[0]; /* if not all list of streams */
} SCTP_PACKED;
struct sctp_stream_reset_in_request {
struct sctp_paramhdr ph;
uint32_t request_seq;
uint16_t list_of_streams[0]; /* if not all list of streams */
} SCTP_PACKED;
struct sctp_stream_reset_tsn_request {
struct sctp_paramhdr ph;
uint32_t request_seq;
} SCTP_PACKED;
struct sctp_stream_reset_response {
struct sctp_paramhdr ph;
uint32_t response_seq; /* if a response, the resp seq no */
uint32_t result;
} SCTP_PACKED;
struct sctp_stream_reset_response_tsn {
struct sctp_paramhdr ph;
uint32_t response_seq; /* if a response, the resp seq no */
uint32_t result;
uint32_t senders_next_tsn;
uint32_t receivers_next_tsn;
} SCTP_PACKED;
#define SCTP_STREAM_RESET_NOTHING 0x00000000 /* Nothing for me to do */
#define SCTP_STREAM_RESET_PERFORMED 0x00000001 /* Did it */
#define SCTP_STREAM_RESET_DENIED 0x00000002 /* refused to do it */
#define SCTP_STREAM_RESET_ERROR_STR 0x00000003 /* bad Stream no */
#define SCTP_STREAM_RESET_TRY_LATER 0x00000004 /* collision, try again */
#define SCTP_STREAM_RESET_BAD_SEQNO 0x00000005 /* bad str-reset seq no */
/*
* convience structures, note that if you are making a request for specific
* streams then the request will need to be an overlay structure.
*/
struct sctp_stream_reset_out_req {
struct sctp_chunkhdr ch;
struct sctp_stream_reset_out_request sr_req;
} SCTP_PACKED;
struct sctp_stream_reset_in_req {
struct sctp_chunkhdr ch;
struct sctp_stream_reset_in_request sr_req;
} SCTP_PACKED;
struct sctp_stream_reset_tsn_req {
struct sctp_chunkhdr ch;
struct sctp_stream_reset_tsn_request sr_req;
} SCTP_PACKED;
struct sctp_stream_reset_resp {
struct sctp_chunkhdr ch;
struct sctp_stream_reset_response sr_resp;
} SCTP_PACKED;
/* respone only valid with a TSN request */
struct sctp_stream_reset_resp_tsn {
struct sctp_chunkhdr ch;
struct sctp_stream_reset_response_tsn sr_resp;
} SCTP_PACKED;
/****************************************************/
/*
* Authenticated chunks support draft-ietf-tsvwg-sctp-auth
*/
/* Should we make the max be 32? */
#define SCTP_RANDOM_MAX_SIZE 256
struct sctp_auth_random {
struct sctp_paramhdr ph;/* type = 0x8002 */
uint8_t random_data[0];
} SCTP_PACKED;
struct sctp_auth_chunk_list {
struct sctp_paramhdr ph;/* type = 0x8003 */
uint8_t chunk_types[0];
} SCTP_PACKED;
struct sctp_auth_hmac_algo {
struct sctp_paramhdr ph;/* type = 0x8004 */
uint16_t hmac_ids[0];
} SCTP_PACKED;
struct sctp_auth_chunk {
struct sctp_chunkhdr ch;
uint16_t shared_key_id;
uint16_t hmac_id;
uint8_t hmac[0];
} SCTP_PACKED;
struct sctp_auth_invalid_hmac {
struct sctp_paramhdr ph;
uint16_t hmac_id;
uint16_t padding;
} SCTP_PACKED;
/*
* we pre-reserve enough room for a ECNE or CWR AND a SACK with no missing
* pieces. If ENCE is missing we could have a couple of blocks. This way we
* optimize so we MOST likely can bundle a SACK/ECN with the smallest size
* data chunk I will split into. We could increase throughput slightly by
* taking out these two but the 24-sack/8-CWR i.e. 32 bytes I pre-reserve I
* feel is worth it for now.
*/
#ifndef SCTP_MAX_OVERHEAD
#ifdef INET6
#define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct sctp_ecne_chunk) + \
sizeof(struct sctp_sack_chunk) + \
sizeof(struct ip6_hdr))
#define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct ip6_hdr))
#define SCTP_MIN_OVERHEAD (sizeof(struct ip6_hdr) + \
sizeof(struct sctphdr))
#else
#define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct sctp_ecne_chunk) + \
sizeof(struct sctp_sack_chunk) + \
sizeof(struct ip))
#define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct ip))
#define SCTP_MIN_OVERHEAD (sizeof(struct ip) + \
sizeof(struct sctphdr))
#endif /* INET6 */
#endif /* !SCTP_MAX_OVERHEAD */
#define SCTP_MED_V4_OVERHEAD (sizeof(struct sctp_data_chunk) + \
sizeof(struct sctphdr) + \
sizeof(struct ip))
#define SCTP_MIN_V4_OVERHEAD (sizeof(struct ip) + \
sizeof(struct sctphdr))
#endif /* !__sctp_header_h__ */
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