190 lines
5.5 KiB
C
190 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/* SCTP kernel 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 implementation
|
|
*
|
|
* Please send any bug reports or fixes you make to the
|
|
* email address(es):
|
|
* lksctp developers <linux-sctp@vger.kernel.org>
|
|
*
|
|
* 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>
|
|
*/
|
|
|
|
#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.
|
|
*
|
|
* sctp_ulpevent is saved in sk->cb(48 bytes), whose last 4 bytes
|
|
* have been taken by sock_skb_cb, So here it has to use 'packed'
|
|
* to make sctp_ulpevent fit into the rest 44 bytes.
|
|
*/
|
|
struct sctp_ulpevent {
|
|
struct sctp_association *asoc;
|
|
struct sctp_chunk *chunk;
|
|
unsigned int rmem_len;
|
|
union {
|
|
__u32 mid;
|
|
__u16 ssn;
|
|
};
|
|
union {
|
|
__u32 ppid;
|
|
__u32 fsn;
|
|
};
|
|
__u32 tsn;
|
|
__u32 cumtsn;
|
|
__u16 stream;
|
|
__u16 flags;
|
|
__u16 msg_flags;
|
|
} __packed;
|
|
|
|
/* Retrieve the skb this event sits inside of. */
|
|
static inline struct sk_buff *sctp_event2skb(const 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 *);
|
|
unsigned int 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,
|
|
struct sctp_chunk *chunk,
|
|
gfp_t gfp);
|
|
|
|
void sctp_ulpevent_nofity_peer_addr_change(struct sctp_transport *transport,
|
|
int state, int error);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_remote_error(
|
|
const struct sctp_association *asoc,
|
|
struct sctp_chunk *chunk,
|
|
__u16 flags,
|
|
gfp_t gfp);
|
|
struct sctp_ulpevent *sctp_ulpevent_make_send_failed(
|
|
const struct sctp_association *asoc,
|
|
struct sctp_chunk *chunk,
|
|
__u16 flags,
|
|
__u32 error,
|
|
gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_send_failed_event(
|
|
const struct sctp_association *asoc,
|
|
struct sctp_chunk *chunk,
|
|
__u16 flags,
|
|
__u32 error,
|
|
gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event(
|
|
const struct sctp_association *asoc,
|
|
__u16 flags,
|
|
gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_pdapi(
|
|
const struct sctp_association *asoc,
|
|
__u32 indication, __u32 sid, __u32 seq,
|
|
__u32 flags, gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_adaptation_indication(
|
|
const struct sctp_association *asoc, gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
|
|
struct sctp_chunk *chunk,
|
|
gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_authkey(
|
|
const struct sctp_association *asoc, __u16 key_id,
|
|
__u32 indication, gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
|
|
const struct sctp_association *asoc, gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event(
|
|
const struct sctp_association *asoc, __u16 flags,
|
|
__u16 stream_num, __be16 *stream_list, gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_assoc_reset_event(
|
|
const struct sctp_association *asoc, __u16 flags,
|
|
__u32 local_tsn, __u32 remote_tsn, gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_ulpevent_make_stream_change_event(
|
|
const struct sctp_association *asoc, __u16 flags,
|
|
__u32 strchange_instrms, __u32 strchange_outstrms, gfp_t gfp);
|
|
|
|
struct sctp_ulpevent *sctp_make_reassembled_event(
|
|
struct net *net, struct sk_buff_head *queue,
|
|
struct sk_buff *f_frag, struct sk_buff *l_frag);
|
|
|
|
void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
|
|
struct msghdr *);
|
|
void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event,
|
|
struct msghdr *);
|
|
void sctp_ulpevent_read_nxtinfo(const struct sctp_ulpevent *event,
|
|
struct msghdr *, struct sock *sk);
|
|
|
|
__u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event);
|
|
|
|
static inline void sctp_ulpevent_type_set(__u16 *subscribe,
|
|
__u16 sn_type, __u8 on)
|
|
{
|
|
if (sn_type > SCTP_SN_TYPE_MAX)
|
|
return;
|
|
|
|
if (on)
|
|
*subscribe |= (1 << (sn_type - SCTP_SN_TYPE_BASE));
|
|
else
|
|
*subscribe &= ~(1 << (sn_type - SCTP_SN_TYPE_BASE));
|
|
}
|
|
|
|
/* Is this event type enabled? */
|
|
static inline bool sctp_ulpevent_type_enabled(__u16 subscribe, __u16 sn_type)
|
|
{
|
|
if (sn_type > SCTP_SN_TYPE_MAX)
|
|
return false;
|
|
|
|
return subscribe & (1 << (sn_type - SCTP_SN_TYPE_BASE));
|
|
}
|
|
|
|
/* Given an event subscription, is this event enabled? */
|
|
static inline bool sctp_ulpevent_is_enabled(const struct sctp_ulpevent *event,
|
|
__u16 subscribe)
|
|
{
|
|
__u16 sn_type;
|
|
|
|
if (!sctp_ulpevent_is_notification(event))
|
|
return true;
|
|
|
|
sn_type = sctp_ulpevent_get_notification_type(event);
|
|
|
|
return sctp_ulpevent_type_enabled(subscribe, sn_type);
|
|
}
|
|
|
|
#endif /* __sctp_ulpevent_h__ */
|