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/include/net/sctp/ulpevent.h

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35
C++ Header | 168 lines | 88 code | 25 blank | 55 comment | 1 complexity | 551fa80762fc237fae401a1d2e293c1f MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  1/* SCTP kernel implementation
  2 * (C) Copyright IBM Corp. 2001, 2004
  3 * Copyright (c) 1999-2000 Cisco, Inc.
  4 * Copyright (c) 1999-2001 Motorola, Inc.
  5 * Copyright (c) 2001 Intel Corp.
  6 * Copyright (c) 2001 Nokia, Inc.
  7 * Copyright (c) 2001 La Monte H.P. Yarroll
  8 *
  9 * These are the definitions needed for the sctp_ulpevent type.  The
 10 * sctp_ulpevent type is used to carry information from the state machine
 11 * upwards to the ULP.
 12 *
 13 * This file is part of the SCTP kernel implementation
 14 *
 15 * This SCTP implementation is free software;
 16 * you can redistribute it and/or modify it under the terms of
 17 * the GNU General Public License as published by
 18 * the Free Software Foundation; either version 2, or (at your option)
 19 * any later version.
 20 *
 21 * This SCTP implementation is distributed in the hope that it
 22 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 23 *                 ************************
 24 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 25 * See the GNU General Public License for more details.
 26 *
 27 * You should have received a copy of the GNU General Public License
 28 * along with GNU CC; see the file COPYING.  If not, write to
 29 * the Free Software Foundation, 59 Temple Place - Suite 330,
 30 * Boston, MA 02111-1307, USA.
 31 *
 32 * Please send any bug reports or fixes you make to the
 33 * email address(es):
 34 *    lksctp developers <lksctp-developers@lists.sourceforge.net>
 35 *
 36 * Or submit a bug report through the following website:
 37 *    http://www.sf.net/projects/lksctp
 38 *
 39 * Written or modified by:
 40 *   Jon Grimm             <jgrimm@us.ibm.com>
 41 *   La Monte H.P. Yarroll <piggy@acm.org>
 42 *   Karl Knutson          <karl@athena.chicago.il.us>
 43 *   Sridhar Samudrala     <sri@us.ibm.com>
 44 *
 45 * Any bugs reported given to us we will try to fix... any fixes shared will
 46 * be incorporated into the next SCTP release.
 47 */
 48
 49#ifndef __sctp_ulpevent_h__
 50#define __sctp_ulpevent_h__
 51
 52/* A structure to carry information to the ULP (e.g. Sockets API) */
 53/* Warning: This sits inside an skb.cb[] area.  Be very careful of
 54 * growing this structure as it is at the maximum limit now.
 55 */
 56struct sctp_ulpevent {
 57	struct sctp_association *asoc;
 58	__u16 stream;
 59	__u16 ssn;
 60	__u16 flags;
 61	__u32 ppid;
 62	__u32 tsn;
 63	__u32 cumtsn;
 64	int msg_flags;
 65	int iif;
 66	unsigned int rmem_len;
 67};
 68
 69/* Retrieve the skb this event sits inside of. */
 70static inline struct sk_buff *sctp_event2skb(const struct sctp_ulpevent *ev)
 71{
 72	return container_of((void *)ev, struct sk_buff, cb);
 73}
 74
 75/* Retrieve & cast the event sitting inside the skb. */
 76static inline struct sctp_ulpevent *sctp_skb2event(struct sk_buff *skb)
 77{
 78	return (struct sctp_ulpevent *)skb->cb;
 79}
 80
 81void sctp_ulpevent_free(struct sctp_ulpevent *);
 82int sctp_ulpevent_is_notification(const struct sctp_ulpevent *);
 83void sctp_queue_purge_ulpevents(struct sk_buff_head *list);
 84
 85struct sctp_ulpevent *sctp_ulpevent_make_assoc_change(
 86	const struct sctp_association *asoc,
 87	__u16 flags,
 88	__u16 state,
 89	__u16 error,
 90	__u16 outbound,
 91	__u16 inbound,
 92	struct sctp_chunk *chunk,
 93	gfp_t gfp);
 94
 95struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change(
 96	const struct sctp_association *asoc,
 97	const struct sockaddr_storage *aaddr,
 98	int flags,
 99	int state,
100	int error,
101	gfp_t gfp);
102
103struct sctp_ulpevent *sctp_ulpevent_make_remote_error(
104	const struct sctp_association *asoc,
105	struct sctp_chunk *chunk,
106	__u16 flags,
107	gfp_t gfp);
108struct sctp_ulpevent *sctp_ulpevent_make_send_failed(
109	const struct sctp_association *asoc,
110	struct sctp_chunk *chunk,
111	__u16 flags,
112	__u32 error,
113	gfp_t gfp);
114
115struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event(
116	const struct sctp_association *asoc,
117	__u16 flags,
118	gfp_t gfp);
119
120struct sctp_ulpevent *sctp_ulpevent_make_pdapi(
121	const struct sctp_association *asoc,
122	__u32 indication, gfp_t gfp);
123
124struct sctp_ulpevent *sctp_ulpevent_make_adaptation_indication(
125	const struct sctp_association *asoc, gfp_t gfp);
126
127struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
128	struct sctp_chunk *chunk,
129	gfp_t gfp);
130
131struct sctp_ulpevent *sctp_ulpevent_make_authkey(
132	const struct sctp_association *asoc, __u16 key_id,
133	__u32 indication, gfp_t gfp);
134
135void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
136	struct msghdr *);
137__u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event);
138
139/* Is this event type enabled? */
140static inline int sctp_ulpevent_type_enabled(__u16 sn_type,
141					     struct sctp_event_subscribe *mask)
142{
143	char *amask = (char *) mask;
144	return amask[sn_type - SCTP_SN_TYPE_BASE];
145}
146
147/* Given an event subscription, is this event enabled? */
148static inline int sctp_ulpevent_is_enabled(const struct sctp_ulpevent *event,
149					   struct sctp_event_subscribe *mask)
150{
151	__u16 sn_type;
152	int enabled = 1;
153
154	if (sctp_ulpevent_is_notification(event)) {
155		sn_type = sctp_ulpevent_get_notification_type(event);
156		enabled = sctp_ulpevent_type_enabled(sn_type, mask);
157	}
158	return enabled;
159}
160
161#endif /* __sctp_ulpevent_h__ */
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