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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /include/net/sctp/ulpevent.h
parentInitial commit. (diff)
downloadlinux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz
linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/net/sctp/ulpevent.h')
-rw-r--r--include/net/sctp/ulpevent.h189
1 files changed, 189 insertions, 0 deletions
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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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* 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
+ *
+ * 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.
+ *
+ * sctp_ulpevent is saved in sk->cb(48 bytes), whose last 4 bytes
+ * have been taken by sock_skb_cb, So here it has to use 'packed'
+ * to make sctp_ulpevent fit into the rest 44 bytes.
+ */
+struct sctp_ulpevent {
+ struct sctp_association *asoc;
+ struct sctp_chunk *chunk;
+ unsigned int rmem_len;
+ union {
+ __u32 mid;
+ __u16 ssn;
+ };
+ union {
+ __u32 ppid;
+ __u32 fsn;
+ };
+ __u32 tsn;
+ __u32 cumtsn;
+ __u16 stream;
+ __u16 flags;
+ __u16 msg_flags;
+} __packed;
+
+/* 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);
+
+void sctp_ulpevent_notify_peer_addr_change(struct sctp_transport *transport,
+ int state, int error);
+
+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_send_failed_event(
+ 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, __u32 sid, __u32 seq,
+ __u32 flags, 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);
+
+struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event(
+ const struct sctp_association *asoc, __u16 flags,
+ __u16 stream_num, __be16 *stream_list, gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_assoc_reset_event(
+ const struct sctp_association *asoc, __u16 flags,
+ __u32 local_tsn, __u32 remote_tsn, gfp_t gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_stream_change_event(
+ const struct sctp_association *asoc, __u16 flags,
+ __u32 strchange_instrms, __u32 strchange_outstrms, gfp_t gfp);
+
+struct sctp_ulpevent *sctp_make_reassembled_event(
+ struct net *net, struct sk_buff_head *queue,
+ struct sk_buff *f_frag, struct sk_buff *l_frag);
+
+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);
+
+static inline void sctp_ulpevent_type_set(__u16 *subscribe,
+ __u16 sn_type, __u8 on)
+{
+ if (sn_type > SCTP_SN_TYPE_MAX)
+ return;
+
+ if (on)
+ *subscribe |= (1 << (sn_type - SCTP_SN_TYPE_BASE));
+ else
+ *subscribe &= ~(1 << (sn_type - SCTP_SN_TYPE_BASE));
+}
+
+/* Is this event type enabled? */
+static inline bool sctp_ulpevent_type_enabled(__u16 subscribe, __u16 sn_type)
+{
+ if (sn_type > SCTP_SN_TYPE_MAX)
+ return false;
+
+ return subscribe & (1 << (sn_type - SCTP_SN_TYPE_BASE));
+}
+
+/* Given an event subscription, is this event enabled? */
+static inline bool sctp_ulpevent_is_enabled(const struct sctp_ulpevent *event,
+ __u16 subscribe)
+{
+ __u16 sn_type;
+
+ if (!sctp_ulpevent_is_notification(event))
+ return true;
+
+ sn_type = sctp_ulpevent_get_notification_type(event);
+
+ return sctp_ulpevent_type_enabled(subscribe, sn_type);
+}
+
+#endif /* __sctp_ulpevent_h__ */