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 void sctp_ulpq_init(struct sctp_ulpq *ulpq, struct sctp_association *asoc); 39 void sctp_ulpq_flush(struct sctp_ulpq *ulpq); 40 void sctp_ulpq_free(struct sctp_ulpq *); 41 42 /* Add a new DATA chunk for processing. */ 43 int sctp_ulpq_tail_data(struct sctp_ulpq *, struct sctp_chunk *, gfp_t); 44 45 /* Add a new event for propagation to the ULP. */ 46 int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sk_buff_head *skb_list); 47 48 /* Renege previously received chunks. */ 49 void sctp_ulpq_renege(struct sctp_ulpq *, struct sctp_chunk *, gfp_t); 50 51 /* Perform partial delivery. */ 52 void sctp_ulpq_partial_delivery(struct sctp_ulpq *, gfp_t); 53 54 /* Abort the partial delivery. */ 55 void sctp_ulpq_abort_pd(struct sctp_ulpq *, gfp_t); 56 57 /* Clear the partial data delivery condition on this socket. */ 58 int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc); 59 60 /* Skip over an SSN. */ 61 void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn); 62 63 void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *, __u32); 64 65 __u16 sctp_ulpq_renege_list(struct sctp_ulpq *ulpq, 66 struct sk_buff_head *list, __u16 needed); 67 68 #endif /* __sctp_ulpqueue_h__ */ 69