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