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Diffstat (limited to 'include/net/sctp/ulpevent.h')
| -rw-r--r-- | include/net/sctp/ulpevent.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/include/net/sctp/ulpevent.h b/include/net/sctp/ulpevent.h new file mode 100644 index 000000000000..1019d83a580a --- /dev/null +++ b/include/net/sctp/ulpevent.h @@ -0,0 +1,162 @@ +/* SCTP kernel reference Implementation + * (C) Copyright IBM Corp. 2001, 2004 + * Copyright (c) 1999-2000 Cisco, Inc. + * Copyright (c) 1999-2001 Motorola, Inc. + * Copyright (c) 2001 Intel Corp. + * Copyright (c) 2001 Nokia, Inc. + * Copyright (c) 2001 La Monte H.P. Yarroll + * + * These are the definitions needed for the sctp_ulpevent type. The + * sctp_ulpevent type is used to carry information from the state machine + * upwards to the ULP. + * + * This file is part of the SCTP kernel reference Implementation + * + * The SCTP reference implementation is free software; + * you can redistribute it and/or modify it under the terms of + * the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * The SCTP reference implementation is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; without even the implied + * ************************ + * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU CC; see the file COPYING. If not, write to + * the Free Software Foundation, 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + * + * Please send any bug reports or fixes you make to the + * email address(es): + * lksctp developers <lksctp-developers@lists.sourceforge.net> + * + * Or submit a bug report through the following website: + * http://www.sf.net/projects/lksctp + * + * Written or modified by: + * Jon Grimm <jgrimm@us.ibm.com> + * La Monte H.P. Yarroll <piggy@acm.org> + * Karl Knutson <karl@athena.chicago.il.us> + * Sridhar Samudrala <sri@us.ibm.com> + * + * Any bugs reported given to us we will try to fix... any fixes shared will + * be incorporated into the next SCTP release. + */ + +#ifndef __sctp_ulpevent_h__ +#define __sctp_ulpevent_h__ + +/* A structure to carry information to the ULP (e.g. Sockets API) */ +/* Warning: This sits inside an skb.cb[] area. Be very careful of + * growing this structure as it is at the maximum limit now. + */ +struct sctp_ulpevent { + struct sctp_association *asoc; + __u16 stream; + __u16 ssn; + __u16 flags; + __u32 ppid; + __u32 tsn; + __u32 cumtsn; + int msg_flags; + int iif; +}; + +/* Retrieve the skb this event sits inside of. */ +static inline struct sk_buff *sctp_event2skb(struct sctp_ulpevent *ev) +{ + return container_of((void *)ev, struct sk_buff, cb); +} + +/* Retrieve & cast the event sitting inside the skb. */ +static inline struct sctp_ulpevent *sctp_skb2event(struct sk_buff *skb) +{ + return (struct sctp_ulpevent *)skb->cb; +} + +void sctp_ulpevent_free(struct sctp_ulpevent *); +int sctp_ulpevent_is_notification(const struct sctp_ulpevent *); +void sctp_queue_purge_ulpevents(struct sk_buff_head *list); + +struct sctp_ulpevent *sctp_ulpevent_make_assoc_change( + const struct sctp_association *asoc, + __u16 flags, + __u16 state, + __u16 error, + __u16 outbound, + __u16 inbound, + int gfp); + +struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change( + const struct sctp_association *asoc, + const struct sockaddr_storage *aaddr, + int flags, + int state, + int error, + int gfp); + +struct sctp_ulpevent *sctp_ulpevent_make_remote_error( + const struct sctp_association *asoc, + struct sctp_chunk *chunk, + __u16 flags, + int gfp); +struct sctp_ulpevent *sctp_ulpevent_make_send_failed( + const struct sctp_association *asoc, + struct sctp_chunk *chunk, + __u16 flags, + __u32 error, + int gfp); + +struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event( + const struct sctp_association *asoc, + __u16 flags, + int gfp); + +struct sctp_ulpevent *sctp_ulpevent_make_pdapi( + const struct sctp_association *asoc, + __u32 indication, int gfp); + +struct sctp_ulpevent *sctp_ulpevent_make_adaption_indication( + const struct sctp_association *asoc, int gfp); + +struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc, + struct sctp_chunk *chunk, + int gfp); + +void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event, + struct msghdr *); +__u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event); + +/* Is this event type enabled? */ +static inline int sctp_ulpevent_type_enabled(__u16 sn_type, + struct sctp_event_subscribe *mask) +{ + char *amask = (char *) mask; + return amask[sn_type - SCTP_SN_TYPE_BASE]; +} + +/* Given an event subscription, is this event enabled? */ +static inline int sctp_ulpevent_is_enabled(const struct sctp_ulpevent *event, + struct sctp_event_subscribe *mask) +{ + __u16 sn_type; + int enabled = 1; + + if (sctp_ulpevent_is_notification(event)) { + sn_type = sctp_ulpevent_get_notification_type(event); + enabled = sctp_ulpevent_type_enabled(sn_type, mask); + } + return enabled; +} + +#endif /* __sctp_ulpevent_h__ */ + + + + + + + |