1 /* SCTP kernel reference 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_ulpevent type. The 10 * sctp_ulpevent type is used to carry information from the state machine 11 * upwards to the ULP. 12 * 13 * This file is part of the SCTP kernel reference Implementation 14 * 15 * The SCTP reference implementation is free software; 16 * you can redistribute it and/or modify it under the terms of 17 * the GNU General Public License as published by 18 * the Free Software Foundation; either version 2, or (at your option) 19 * any later version. 20 * 21 * The SCTP reference implementation is distributed in the hope that it 22 * will be useful, but WITHOUT ANY WARRANTY; without even the implied 23 * ************************ 24 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 25 * See the GNU General Public License for more details. 26 * 27 * You should have received a copy of the GNU General Public License 28 * along with GNU CC; see the file COPYING. If not, write to 29 * the Free Software Foundation, 59 Temple Place - Suite 330, 30 * Boston, MA 02111-1307, USA. 31 * 32 * Please send any bug reports or fixes you make to the 33 * email address(es): 34 * lksctp developers <lksctp-developers@lists.sourceforge.net> 35 * 36 * Or submit a bug report through the following website: 37 * http://www.sf.net/projects/lksctp 38 * 39 * Written or modified by: 40 * Jon Grimm <jgrimm@us.ibm.com> 41 * La Monte H.P. Yarroll <piggy@acm.org> 42 * Karl Knutson <karl@athena.chicago.il.us> 43 * Sridhar Samudrala <sri@us.ibm.com> 44 * 45 * Any bugs reported given to us we will try to fix... any fixes shared will 46 * be incorporated into the next SCTP release. 47 */ 48 49 #ifndef __sctp_ulpevent_h__ 50 #define __sctp_ulpevent_h__ 51 52 /* A structure to carry information to the ULP (e.g. Sockets API) */ 53 /* Warning: This sits inside an skb.cb[] area. Be very careful of 54 * growing this structure as it is at the maximum limit now. 55 */ 56 struct sctp_ulpevent { 57 struct sctp_association *asoc; 58 __u16 stream; 59 __u16 ssn; 60 __u16 flags; 61 __u32 ppid; 62 __u32 tsn; 63 __u32 cumtsn; 64 int msg_flags; 65 int iif; 66 }; 67 68 /* Retrieve the skb this event sits inside of. */ 69 static inline struct sk_buff *sctp_event2skb(struct sctp_ulpevent *ev) 70 { 71 return container_of((void *)ev, struct sk_buff, cb); 72 } 73 74 /* Retrieve & cast the event sitting inside the skb. */ 75 static inline struct sctp_ulpevent *sctp_skb2event(struct sk_buff *skb) 76 { 77 return (struct sctp_ulpevent *)skb->cb; 78 } 79 80 void sctp_ulpevent_free(struct sctp_ulpevent *); 81 int sctp_ulpevent_is_notification(const struct sctp_ulpevent *); 82 void sctp_queue_purge_ulpevents(struct sk_buff_head *list); 83 84 struct sctp_ulpevent *sctp_ulpevent_make_assoc_change( 85 const struct sctp_association *asoc, 86 __u16 flags, 87 __u16 state, 88 __u16 error, 89 __u16 outbound, 90 __u16 inbound, 91 gfp_t gfp); 92 93 struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change( 94 const struct sctp_association *asoc, 95 const struct sockaddr_storage *aaddr, 96 int flags, 97 int state, 98 int error, 99 gfp_t gfp); 100 101 struct sctp_ulpevent *sctp_ulpevent_make_remote_error( 102 const struct sctp_association *asoc, 103 struct sctp_chunk *chunk, 104 __u16 flags, 105 gfp_t gfp); 106 struct sctp_ulpevent *sctp_ulpevent_make_send_failed( 107 const struct sctp_association *asoc, 108 struct sctp_chunk *chunk, 109 __u16 flags, 110 __u32 error, 111 gfp_t gfp); 112 113 struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event( 114 const struct sctp_association *asoc, 115 __u16 flags, 116 gfp_t gfp); 117 118 struct sctp_ulpevent *sctp_ulpevent_make_pdapi( 119 const struct sctp_association *asoc, 120 __u32 indication, gfp_t gfp); 121 122 struct sctp_ulpevent *sctp_ulpevent_make_adaption_indication( 123 const struct sctp_association *asoc, gfp_t gfp); 124 125 struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc, 126 struct sctp_chunk *chunk, 127 gfp_t gfp); 128 129 void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event, 130 struct msghdr *); 131 __u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event); 132 133 /* Is this event type enabled? */ 134 static inline int sctp_ulpevent_type_enabled(__u16 sn_type, 135 struct sctp_event_subscribe *mask) 136 { 137 char *amask = (char *) mask; 138 return amask[sn_type - SCTP_SN_TYPE_BASE]; 139 } 140 141 /* Given an event subscription, is this event enabled? */ 142 static inline int sctp_ulpevent_is_enabled(const struct sctp_ulpevent *event, 143 struct sctp_event_subscribe *mask) 144 { 145 __u16 sn_type; 146 int enabled = 1; 147 148 if (sctp_ulpevent_is_notification(event)) { 149 sn_type = sctp_ulpevent_get_notification_type(event); 150 enabled = sctp_ulpevent_type_enabled(sn_type, mask); 151 } 152 return enabled; 153 } 154 155 #endif /* __sctp_ulpevent_h__ */ 156 157 158 159 160 161 162 163