cd4fcc704f
Trigger user ABORT if application closes a socket which has data queued on the socket receive queue or chunks waiting on the reassembly or ordering queue as this would imply data being lost which defeats the point of a graceful shutdown. This behavior is already practiced in TCP. We do not check the input queue because that would mean to parse all chunks on it to look for unacknowledged data which seems too much of an effort. Control chunks or duplicated chunks may also be in the input queue and should not be stopping a graceful shutdown. Signed-off-by: Thomas Graf <tgraf@infradead.org> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
172 lines
5 KiB
C
172 lines
5 KiB
C
/* SCTP kernel implementation
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* (C) Copyright IBM Corp. 2001, 2004
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* Copyright (c) 1999-2000 Cisco, Inc.
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* Copyright (c) 1999-2001 Motorola, Inc.
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* Copyright (c) 2001 Intel Corp.
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* Copyright (c) 2001 Nokia, Inc.
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* Copyright (c) 2001 La Monte H.P. Yarroll
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*
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* These are the definitions needed for the sctp_ulpevent type. The
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* sctp_ulpevent type is used to carry information from the state machine
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* upwards to the ULP.
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*
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* This file is part of the SCTP kernel implementation
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*
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* This SCTP implementation is free software;
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This SCTP implementation is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <lksctp-developers@lists.sourceforge.net>
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*
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* Or submit a bug report through the following website:
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* http://www.sf.net/projects/lksctp
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*
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* Written or modified by:
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* Jon Grimm <jgrimm@us.ibm.com>
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* La Monte H.P. Yarroll <piggy@acm.org>
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* Karl Knutson <karl@athena.chicago.il.us>
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* Sridhar Samudrala <sri@us.ibm.com>
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorporated into the next SCTP release.
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*/
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#ifndef __sctp_ulpevent_h__
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#define __sctp_ulpevent_h__
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/* A structure to carry information to the ULP (e.g. Sockets API) */
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/* Warning: This sits inside an skb.cb[] area. Be very careful of
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* growing this structure as it is at the maximum limit now.
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*/
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struct sctp_ulpevent {
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struct sctp_association *asoc;
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__u16 stream;
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__u16 ssn;
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__u16 flags;
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__u32 ppid;
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__u32 tsn;
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__u32 cumtsn;
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int msg_flags;
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int iif;
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unsigned int rmem_len;
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};
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/* Retrieve the skb this event sits inside of. */
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static inline struct sk_buff *sctp_event2skb(const struct sctp_ulpevent *ev)
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{
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return container_of((void *)ev, struct sk_buff, cb);
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}
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/* Retrieve & cast the event sitting inside the skb. */
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static inline struct sctp_ulpevent *sctp_skb2event(struct sk_buff *skb)
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{
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return (struct sctp_ulpevent *)skb->cb;
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}
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void sctp_ulpevent_free(struct sctp_ulpevent *);
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int sctp_ulpevent_is_notification(const struct sctp_ulpevent *);
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unsigned int sctp_queue_purge_ulpevents(struct sk_buff_head *list);
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struct sctp_ulpevent *sctp_ulpevent_make_assoc_change(
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const struct sctp_association *asoc,
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__u16 flags,
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__u16 state,
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__u16 error,
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__u16 outbound,
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__u16 inbound,
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struct sctp_chunk *chunk,
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gfp_t gfp);
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struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change(
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const struct sctp_association *asoc,
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const struct sockaddr_storage *aaddr,
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int flags,
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int state,
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int error,
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gfp_t gfp);
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struct sctp_ulpevent *sctp_ulpevent_make_remote_error(
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const struct sctp_association *asoc,
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struct sctp_chunk *chunk,
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__u16 flags,
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gfp_t gfp);
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struct sctp_ulpevent *sctp_ulpevent_make_send_failed(
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const struct sctp_association *asoc,
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struct sctp_chunk *chunk,
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__u16 flags,
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__u32 error,
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gfp_t gfp);
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struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event(
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const struct sctp_association *asoc,
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__u16 flags,
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gfp_t gfp);
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struct sctp_ulpevent *sctp_ulpevent_make_pdapi(
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const struct sctp_association *asoc,
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__u32 indication, gfp_t gfp);
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struct sctp_ulpevent *sctp_ulpevent_make_adaptation_indication(
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const struct sctp_association *asoc, gfp_t gfp);
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struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
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struct sctp_chunk *chunk,
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gfp_t gfp);
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struct sctp_ulpevent *sctp_ulpevent_make_authkey(
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const struct sctp_association *asoc, __u16 key_id,
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__u32 indication, gfp_t gfp);
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struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
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const struct sctp_association *asoc, gfp_t gfp);
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void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
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struct msghdr *);
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__u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event);
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/* Is this event type enabled? */
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static inline int sctp_ulpevent_type_enabled(__u16 sn_type,
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struct sctp_event_subscribe *mask)
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{
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char *amask = (char *) mask;
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return amask[sn_type - SCTP_SN_TYPE_BASE];
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}
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/* Given an event subscription, is this event enabled? */
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static inline int sctp_ulpevent_is_enabled(const struct sctp_ulpevent *event,
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struct sctp_event_subscribe *mask)
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{
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__u16 sn_type;
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int enabled = 1;
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if (sctp_ulpevent_is_notification(event)) {
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sn_type = sctp_ulpevent_get_notification_type(event);
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enabled = sctp_ulpevent_type_enabled(sn_type, mask);
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}
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return enabled;
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}
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#endif /* __sctp_ulpevent_h__ */
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