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ulpqueue.h
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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_ulpq type. The
10  * sctp_ulpq is the interface between the Upper Layer Protocol, or ULP,
11  * and the core SCTP state machine. This is the component which handles
12  * reassembly and ordering.
13  *
14  * This SCTP implementation is free software;
15  * you can redistribute it and/or modify it under the terms of
16  * the GNU General Public License as published by
17  * the Free Software Foundation; either version 2, or (at your option)
18  * any later version.
19  *
20  * This SCTP implementation is distributed in the hope that it
21  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
22  * ************************
23  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
24  * See the GNU General Public License for more details.
25  *
26  * You should have received a copy of the GNU General Public License
27  * along with GNU CC; see the file COPYING. If not, write to
28  * the Free Software Foundation, 59 Temple Place - Suite 330,
29  * Boston, MA 02111-1307, USA.
30  *
31  * Please send any bug reports or fixes you make to the
32  * email addresses:
33  * lksctp developers <[email protected]>
34  *
35  * Or submit a bug report through the following website:
36  * http://www.sf.net/projects/lksctp
37  *
38  * Written or modified by:
39  * Jon Grimm <[email protected]>
40  * La Monte H.P. Yarroll <[email protected]>
41  * Sridhar Samudrala <[email protected]>
42  *
43  * Any bugs reported given to us we will try to fix... any fixes shared will
44  * be incorporated into the next SCTP release.
45  */
46 
47 #ifndef __sctp_ulpqueue_h__
48 #define __sctp_ulpqueue_h__
49 
50 /* A structure to carry information to the ULP (e.g. Sockets API) */
51 struct sctp_ulpq {
52  char malloced;
53  char pd_mode;
54  struct sctp_association *asoc;
55  struct sk_buff_head reasm;
56  struct sk_buff_head lobby;
57 };
58 
59 /* Prototypes. */
60 struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *,
61  struct sctp_association *);
62 void sctp_ulpq_flush(struct sctp_ulpq *ulpq);
63 void sctp_ulpq_free(struct sctp_ulpq *);
64 
65 /* Add a new DATA chunk for processing. */
66 int sctp_ulpq_tail_data(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
67 
68 /* Add a new event for propagation to the ULP. */
69 int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sctp_ulpevent *ev);
70 
71 /* Renege previously received chunks. */
72 void sctp_ulpq_renege(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
73 
74 /* Perform partial delivery. */
75 void sctp_ulpq_partial_delivery(struct sctp_ulpq *, struct sctp_chunk *, gfp_t);
76 
77 /* Abort the partial delivery. */
78 void sctp_ulpq_abort_pd(struct sctp_ulpq *, gfp_t);
79 
80 /* Clear the partial data delivery condition on this socket. */
81 int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc);
82 
83 /* Skip over an SSN. */
84 void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn);
85 
86 void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *, __u32);
87 #endif /* __sctp_ulpqueue_h__ */
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