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60c778b2 | 1 | /* SCTP kernel implementation |
1da177e4 LT |
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 | * | |
60c778b2 | 13 | * This file is part of the SCTP kernel implementation |
1da177e4 | 14 | * |
60c778b2 | 15 | * This SCTP implementation is free software; |
1da177e4 LT |
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 | * | |
60c778b2 | 21 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
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 | |
4b2f13a2 JK |
28 | * along with GNU CC; see the file COPYING. If not, see |
29 | * <http://www.gnu.org/licenses/>. | |
1da177e4 LT |
30 | * |
31 | * Please send any bug reports or fixes you make to the | |
32 | * email address(es): | |
91705c61 | 33 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 | 34 | * |
1da177e4 LT |
35 | * Written or modified by: |
36 | * Jon Grimm <jgrimm@us.ibm.com> | |
37 | * La Monte H.P. Yarroll <piggy@acm.org> | |
38 | * Karl Knutson <karl@athena.chicago.il.us> | |
39 | * Sridhar Samudrala <sri@us.ibm.com> | |
1da177e4 LT |
40 | */ |
41 | ||
42 | #ifndef __sctp_ulpevent_h__ | |
43 | #define __sctp_ulpevent_h__ | |
44 | ||
45 | /* A structure to carry information to the ULP (e.g. Sockets API) */ | |
46 | /* Warning: This sits inside an skb.cb[] area. Be very careful of | |
47 | * growing this structure as it is at the maximum limit now. | |
48 | */ | |
49 | struct sctp_ulpevent { | |
50 | struct sctp_association *asoc; | |
1f45f78f | 51 | struct sctp_chunk *chunk; |
f5d258e6 | 52 | unsigned int rmem_len; |
1da177e4 LT |
53 | __u32 ppid; |
54 | __u32 tsn; | |
55 | __u32 cumtsn; | |
f5d258e6 MRL |
56 | __u16 stream; |
57 | __u16 ssn; | |
58 | __u16 flags; | |
59 | __u16 msg_flags; | |
1da177e4 LT |
60 | }; |
61 | ||
62 | /* Retrieve the skb this event sits inside of. */ | |
ab38fb04 | 63 | static inline struct sk_buff *sctp_event2skb(const struct sctp_ulpevent *ev) |
1da177e4 LT |
64 | { |
65 | return container_of((void *)ev, struct sk_buff, cb); | |
66 | } | |
67 | ||
68 | /* Retrieve & cast the event sitting inside the skb. */ | |
69 | static inline struct sctp_ulpevent *sctp_skb2event(struct sk_buff *skb) | |
70 | { | |
71 | return (struct sctp_ulpevent *)skb->cb; | |
72 | } | |
73 | ||
74 | void sctp_ulpevent_free(struct sctp_ulpevent *); | |
75 | int sctp_ulpevent_is_notification(const struct sctp_ulpevent *); | |
cd4fcc70 | 76 | unsigned int sctp_queue_purge_ulpevents(struct sk_buff_head *list); |
1da177e4 LT |
77 | |
78 | struct sctp_ulpevent *sctp_ulpevent_make_assoc_change( | |
79 | const struct sctp_association *asoc, | |
80 | __u16 flags, | |
81 | __u16 state, | |
82 | __u16 error, | |
83 | __u16 outbound, | |
84 | __u16 inbound, | |
a5a35e76 | 85 | struct sctp_chunk *chunk, |
dd0fc66f | 86 | gfp_t gfp); |
1da177e4 LT |
87 | |
88 | struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change( | |
89 | const struct sctp_association *asoc, | |
90 | const struct sockaddr_storage *aaddr, | |
91 | int flags, | |
92 | int state, | |
93 | int error, | |
dd0fc66f | 94 | gfp_t gfp); |
1da177e4 LT |
95 | |
96 | struct sctp_ulpevent *sctp_ulpevent_make_remote_error( | |
97 | const struct sctp_association *asoc, | |
98 | struct sctp_chunk *chunk, | |
99 | __u16 flags, | |
dd0fc66f | 100 | gfp_t gfp); |
1da177e4 LT |
101 | struct sctp_ulpevent *sctp_ulpevent_make_send_failed( |
102 | const struct sctp_association *asoc, | |
103 | struct sctp_chunk *chunk, | |
104 | __u16 flags, | |
105 | __u32 error, | |
dd0fc66f | 106 | gfp_t gfp); |
1da177e4 LT |
107 | |
108 | struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event( | |
109 | const struct sctp_association *asoc, | |
110 | __u16 flags, | |
dd0fc66f | 111 | gfp_t gfp); |
1da177e4 LT |
112 | |
113 | struct sctp_ulpevent *sctp_ulpevent_make_pdapi( | |
114 | const struct sctp_association *asoc, | |
dd0fc66f | 115 | __u32 indication, gfp_t gfp); |
1da177e4 | 116 | |
0f3fffd8 | 117 | struct sctp_ulpevent *sctp_ulpevent_make_adaptation_indication( |
dd0fc66f | 118 | const struct sctp_association *asoc, gfp_t gfp); |
1da177e4 LT |
119 | |
120 | struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc, | |
121 | struct sctp_chunk *chunk, | |
dd0fc66f | 122 | gfp_t gfp); |
1da177e4 | 123 | |
65b07e5d VY |
124 | struct sctp_ulpevent *sctp_ulpevent_make_authkey( |
125 | const struct sctp_association *asoc, __u16 key_id, | |
126 | __u32 indication, gfp_t gfp); | |
127 | ||
e1cdd553 WY |
128 | struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event( |
129 | const struct sctp_association *asoc, gfp_t gfp); | |
35ea82d6 XL |
130 | |
131 | struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event( | |
132 | const struct sctp_association *asoc, __u16 flags, | |
1da4fc97 | 133 | __u16 stream_num, __be16 *stream_list, gfp_t gfp); |
c95129d1 XL |
134 | |
135 | struct sctp_ulpevent *sctp_ulpevent_make_assoc_reset_event( | |
136 | const struct sctp_association *asoc, __u16 flags, | |
137 | __u32 local_tsn, __u32 remote_tsn, gfp_t gfp); | |
b444153f XL |
138 | |
139 | struct sctp_ulpevent *sctp_ulpevent_make_stream_change_event( | |
140 | const struct sctp_association *asoc, __u16 flags, | |
141 | __u32 strchange_instrms, __u32 strchange_outstrms, gfp_t gfp); | |
e1cdd553 | 142 | |
1da177e4 | 143 | void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event, |
0d3a421d GOV |
144 | struct msghdr *); |
145 | void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event, | |
146 | struct msghdr *); | |
2347c80f GOV |
147 | void sctp_ulpevent_read_nxtinfo(const struct sctp_ulpevent *event, |
148 | struct msghdr *, struct sock *sk); | |
0d3a421d | 149 | |
1da177e4 LT |
150 | __u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event); |
151 | ||
152 | /* Is this event type enabled? */ | |
153 | static inline int sctp_ulpevent_type_enabled(__u16 sn_type, | |
154 | struct sctp_event_subscribe *mask) | |
155 | { | |
fa5f7b51 | 156 | int offset = sn_type - SCTP_SN_TYPE_BASE; |
1da177e4 | 157 | char *amask = (char *) mask; |
fa5f7b51 DC |
158 | |
159 | if (offset >= sizeof(struct sctp_event_subscribe)) | |
160 | return 0; | |
161 | return amask[offset]; | |
1da177e4 LT |
162 | } |
163 | ||
164 | /* Given an event subscription, is this event enabled? */ | |
165 | static inline int sctp_ulpevent_is_enabled(const struct sctp_ulpevent *event, | |
166 | struct sctp_event_subscribe *mask) | |
167 | { | |
168 | __u16 sn_type; | |
169 | int enabled = 1; | |
170 | ||
171 | if (sctp_ulpevent_is_notification(event)) { | |
172 | sn_type = sctp_ulpevent_get_notification_type(event); | |
173 | enabled = sctp_ulpevent_type_enabled(sn_type, mask); | |
174 | } | |
175 | return enabled; | |
176 | } | |
177 | ||
178 | #endif /* __sctp_ulpevent_h__ */ |