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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /include/net/sctp/ulpevent.h
Initial import
Diffstat (limited to 'include/net/sctp/ulpevent.h')
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diff --git a/include/net/sctp/ulpevent.h b/include/net/sctp/ulpevent.h
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+++ b/include/net/sctp/ulpevent.h
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+/* SCTP kernel implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ * Copyright (c) 2001 Nokia, Inc.
+ * Copyright (c) 2001 La Monte H.P. Yarroll
+ *
+ * These are the definitions needed for the sctp_ulpevent type. The
+ * sctp_ulpevent type is used to carry information from the state machine
+ * upwards to the ULP.
+ *
+ * This file is part of the SCTP kernel implementation
+ *
+ * This SCTP implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This SCTP implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ * lksctp developers <linux-sctp@vger.kernel.org>
+ *
+ * Written or modified by:
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ */
+
+#ifndef __sctp_ulpevent_h__
+#define __sctp_ulpevent_h__
+
+/* A structure to carry information to the ULP (e.g. Sockets API) */
+/* Warning: This sits inside an skb.cb[] area. Be very careful of
+ * growing this structure as it is at the maximum limit now.
+ */
+struct sctp_ulpevent {
+ struct sctp_association *asoc;
+ __u16 stream;
+ __u16 ssn;
+ __u16 flags;
+ __u32 ppid;
+ __u32 tsn;
+ __u32 cumtsn;
+ int msg_flags;
+ int iif;
+ unsigned int rmem_len;
+};
+
+/* Retrieve the skb this event sits inside of. */
+static inline struct sk_buff *sctp_event2skb(const struct sctp_ulpevent *ev)
+{
+ return container_of((void *)ev, struct sk_buff, cb);
+}
+
+/* Retrieve & cast the event sitting inside the skb. */
+static inline struct sctp_ulpevent *sctp_skb2event(struct sk_buff *skb)
+{
+ return (struct sctp_ulpevent *)skb->cb;
+}
+
+void sctp_ulpevent_free(struct sctp_ulpevent *);
+int sctp_ulpevent_is_notification(const struct sctp_ulpevent *);
+unsigned int sctp_queue_purge_ulpevents(struct sk_buff_head *list);
+
+struct sctp_ulpevent *sctp_ulpevent_make_assoc_change(
+ const struct sctp_association *asoc,
+ __u16 flags,
+ __u16 state,
+ __u16 error,
+ __u16 outbound,
+ __u16 inbound,
+ struct sctp_chunk *chunk,
+ gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change(
+ const struct sctp_association *asoc,
+ const struct sockaddr_storage *aaddr,
+ int flags,
+ int state,
+ int error,
+ gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_remote_error(
+ const struct sctp_association *asoc,
+ struct sctp_chunk *chunk,
+ __u16 flags,
+ gfp_t gfp);
+struct sctp_ulpevent *sctp_ulpevent_make_send_failed(
+ const struct sctp_association *asoc,
+ struct sctp_chunk *chunk,
+ __u16 flags,
+ __u32 error,
+ gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event(
+ const struct sctp_association *asoc,
+ __u16 flags,
+ gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_pdapi(
+ const struct sctp_association *asoc,
+ __u32 indication, gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_adaptation_indication(
+ const struct sctp_association *asoc, gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
+ struct sctp_chunk *chunk,
+ gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_authkey(
+ const struct sctp_association *asoc, __u16 key_id,
+ __u32 indication, gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
+ const struct sctp_association *asoc, gfp_t gfp);
+
+void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
+ struct msghdr *);
+void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event,
+ struct msghdr *);
+void sctp_ulpevent_read_nxtinfo(const struct sctp_ulpevent *event,
+ struct msghdr *, struct sock *sk);
+
+__u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event);
+
+/* Is this event type enabled? */
+static inline int sctp_ulpevent_type_enabled(__u16 sn_type,
+ struct sctp_event_subscribe *mask)
+{
+ char *amask = (char *) mask;
+ return amask[sn_type - SCTP_SN_TYPE_BASE];
+}
+
+/* Given an event subscription, is this event enabled? */
+static inline int sctp_ulpevent_is_enabled(const struct sctp_ulpevent *event,
+ struct sctp_event_subscribe *mask)
+{
+ __u16 sn_type;
+ int enabled = 1;
+
+ if (sctp_ulpevent_is_notification(event)) {
+ sn_type = sctp_ulpevent_get_notification_type(event);
+ enabled = sctp_ulpevent_type_enabled(sn_type, mask);
+ }
+ return enabled;
+}
+
+#endif /* __sctp_ulpevent_h__ */