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/* 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_ulpq type. The
* sctp_ulpq is the interface between the Upper Layer Protocol, or ULP,
* and the core SCTP state machine. This is the component which handles
* reassembly and ordering.
*
* Please send any bug reports or fixes you make to the
* email addresses:
* 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>
* Sridhar Samudrala <sri@us.ibm.com>
*/
#ifndef __sctp_ulpqueue_h__
#define __sctp_ulpqueue_h__
/* A structure to carry information to the ULP (e.g. Sockets API) */
struct sctp_ulpq {
char pd_mode;
struct sctp_association *asoc;
struct sk_buff_head reasm;
struct sk_buff_head reasm_uo;
struct sk_buff_head lobby;
};
/* Prototypes. */
struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *,
struct sctp_association *);
void sctp_ulpq_flush(struct sctp_ulpq *ulpq);
void sctp_ulpq_free(struct sctp_ulpq *);
/* Add a new DATA chunk for processing. */
int sctp_ulpq_tail_data(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
/* Add a new event for propagation to the ULP. */
int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sk_buff_head *skb_list);
/* Renege previously received chunks. */
void sctp_ulpq_renege(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
/* Perform partial delivery. */
void sctp_ulpq_partial_delivery(struct sctp_ulpq *, gfp_t);
/* Abort the partial delivery. */
void sctp_ulpq_abort_pd(struct sctp_ulpq *, gfp_t);
/* Clear the partial data delivery condition on this socket. */
int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc);
/* Skip over an SSN. */
void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn);
void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *, __u32);
__u16 sctp_ulpq_renege_list(struct sctp_ulpq *ulpq,
struct sk_buff_head *list, __u16 needed);
#endif /* __sctp_ulpqueue_h__ */