1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* SCTP kernel implementation
3 * (C) Copyright IBM Corp. 2001, 2004
4 * Copyright (c) 1999-2000 Cisco, Inc.
5 * Copyright (c) 1999-2001 Motorola, Inc.
6 * Copyright (c) 2001 Intel Corp.
7 * Copyright (c) 2001 Nokia, Inc.
8 * Copyright (c) 2001 La Monte H.P. Yarroll
9 *
10 * These are the definitions needed for the sctp_ulpq type. The
11 * sctp_ulpq is the interface between the Upper Layer Protocol, or ULP,
12 * and the core SCTP state machine. This is the component which handles
13 * reassembly and ordering.
14 *
15 * Please send any bug reports or fixes you make to the
16 * email addresses:
17 * lksctp developers <linux-sctp@vger.kernel.org>
18 *
19 * Written or modified by:
20 * Jon Grimm <jgrimm@us.ibm.com>
21 * La Monte H.P. Yarroll <piggy@acm.org>
22 * Sridhar Samudrala <sri@us.ibm.com>
23 */
24
25 #ifndef __sctp_ulpqueue_h__
26 #define __sctp_ulpqueue_h__
27
28 /* A structure to carry information to the ULP (e.g. Sockets API) */
29 struct sctp_ulpq {
30 char pd_mode;
31 struct sctp_association *asoc;
32 struct sk_buff_head reasm;
33 struct sk_buff_head reasm_uo;
34 struct sk_buff_head lobby;
35 };
36
37 /* Prototypes. */
38 struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *,
39 struct sctp_association *);
40 void sctp_ulpq_flush(struct sctp_ulpq *ulpq);
41 void sctp_ulpq_free(struct sctp_ulpq *);
42
43 /* Add a new DATA chunk for processing. */
44 int sctp_ulpq_tail_data(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
45
46 /* Add a new event for propagation to the ULP. */
47 int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sk_buff_head *skb_list);
48
49 /* Renege previously received chunks. */
50 void sctp_ulpq_renege(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
51
52 /* Perform partial delivery. */
53 void sctp_ulpq_partial_delivery(struct sctp_ulpq *, gfp_t);
54
55 /* Abort the partial delivery. */
56 void sctp_ulpq_abort_pd(struct sctp_ulpq *, gfp_t);
57
58 /* Clear the partial data delivery condition on this socket. */
59 int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc);
60
61 /* Skip over an SSN. */
62 void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn);
63
64 void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *, __u32);
65
66 __u16 sctp_ulpq_renege_list(struct sctp_ulpq *ulpq,
67 struct sk_buff_head *list, __u16 needed);
68
69 #endif /* __sctp_ulpqueue_h__ */