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, see 28 * <http://www.gnu.org/licenses/>. 29 * 30 * Please send any bug reports or fixes you make to the 31 * email addresses: 32 * lksctp developers <linux-sctp@vger.kernel.org> 33 * 34 * Written or modified by: 35 * Jon Grimm <jgrimm@us.ibm.com> 36 * La Monte H.P. Yarroll <piggy@acm.org> 37 * Sridhar Samudrala <sri@us.ibm.com> 38 */ 39 40 #ifndef __sctp_ulpqueue_h__ 41 #define __sctp_ulpqueue_h__ 42 43 /* A structure to carry information to the ULP (e.g. Sockets API) */ 44 struct sctp_ulpq { 45 char pd_mode; 46 struct sctp_association *asoc; 47 struct sk_buff_head reasm; 48 struct sk_buff_head reasm_uo; 49 struct sk_buff_head lobby; 50 }; 51 52 /* Prototypes. */ 53 struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *, 54 struct sctp_association *); 55 void sctp_ulpq_flush(struct sctp_ulpq *ulpq); 56 void sctp_ulpq_free(struct sctp_ulpq *); 57 58 /* Add a new DATA chunk for processing. */ 59 int sctp_ulpq_tail_data(struct sctp_ulpq *, struct sctp_chunk *, gfp_t); 60 61 /* Add a new event for propagation to the ULP. */ 62 int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sctp_ulpevent *ev); 63 64 /* Renege previously received chunks. */ 65 void sctp_ulpq_renege(struct sctp_ulpq *, struct sctp_chunk *, gfp_t); 66 67 /* Perform partial delivery. */ 68 void sctp_ulpq_partial_delivery(struct sctp_ulpq *, gfp_t); 69 70 /* Abort the partial delivery. */ 71 void sctp_ulpq_abort_pd(struct sctp_ulpq *, gfp_t); 72 73 /* Clear the partial data delivery condition on this socket. */ 74 int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc); 75 76 /* Skip over an SSN. */ 77 void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn); 78 79 void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *, __u32); 80 81 __u16 sctp_ulpq_renege_list(struct sctp_ulpq *ulpq, 82 struct sk_buff_head *list, __u16 needed); 83 84 #endif /* __sctp_ulpqueue_h__ */ 85