^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* SCTP kernel implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * (C) Copyright IBM Corp. 2001, 2004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 1999-2000 Cisco, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 1999-2001 Motorola, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2001 Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (c) 2001 Nokia, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (c) 2001 La Monte H.P. Yarroll
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * These functions manipulate an sctp event. The struct ulpevent is used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * to carry notifications and data to the ULP (sockets).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Please send any bug reports or fixes you make to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * email address(es):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * lksctp developers <linux-sctp@vger.kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Written or modified by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Jon Grimm <jgrimm@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * La Monte H.P. Yarroll <piggy@acm.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Ardelle Fan <ardelle.fan@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Sridhar Samudrala <sri@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <net/sctp/structs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <net/sctp/sctp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <net/sctp/sm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static void sctp_ulpevent_receive_data(struct sctp_ulpevent *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct sctp_association *asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static void sctp_ulpevent_release_data(struct sctp_ulpevent *event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static void sctp_ulpevent_release_frag_data(struct sctp_ulpevent *event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) /* Initialize an ULP event from an given skb. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static void sctp_ulpevent_init(struct sctp_ulpevent *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) __u16 msg_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) memset(event, 0, sizeof(struct sctp_ulpevent));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) event->msg_flags = msg_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) event->rmem_len = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* Create a new sctp_ulpevent. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static struct sctp_ulpevent *sctp_ulpevent_new(int size, __u16 msg_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) skb = alloc_skb(size, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) event = sctp_skb2event(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) sctp_ulpevent_init(event, msg_flags, skb->truesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* Is this a MSG_NOTIFICATION? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int sctp_ulpevent_is_notification(const struct sctp_ulpevent *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return MSG_NOTIFICATION == (event->msg_flags & MSG_NOTIFICATION);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* Hold the association in case the msg_name needs read out of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * the association.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static inline void sctp_ulpevent_set_owner(struct sctp_ulpevent *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) const struct sctp_association *asoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct sctp_chunk *chunk = event->chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* Cast away the const, as we are just wanting to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * bump the reference count.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) sctp_association_hold((struct sctp_association *)asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) event->asoc = (struct sctp_association *)asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) atomic_add(event->rmem_len, &event->asoc->rmem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) sctp_skb_set_owner_r(skb, asoc->base.sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (chunk && chunk->head_skb && !chunk->head_skb->sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) chunk->head_skb->sk = asoc->base.sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /* A simple destructor to give up the reference to the association. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static inline void sctp_ulpevent_release_owner(struct sctp_ulpevent *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct sctp_association *asoc = event->asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) atomic_sub(event->rmem_len, &asoc->rmem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) sctp_association_put(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* Create and initialize an SCTP_ASSOC_CHANGE event.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * 5.3.1.1 SCTP_ASSOC_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Communication notifications inform the ULP that an SCTP association
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * has either begun or ended. The identifier for a new association is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * provided by this notification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * Note: There is no field checking here. If a field is unused it will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * zero'd out.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct sctp_ulpevent *sctp_ulpevent_make_assoc_change(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) const struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) __u16 flags, __u16 state, __u16 error, __u16 outbound,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) __u16 inbound, struct sctp_chunk *chunk, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct sctp_assoc_change *sac;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /* If the lower layer passed in the chunk, it will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * an ABORT, so we need to include it in the sac_info.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (chunk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* Copy the chunk data to a new skb and reserve enough
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * head room to use as notification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) skb = skb_copy_expand(chunk->skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) sizeof(struct sctp_assoc_change), 0, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) /* Embed the event fields inside the cloned skb. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) event = sctp_skb2event(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /* Include the notification structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) sac = skb_push(skb, sizeof(struct sctp_assoc_change));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /* Trim the buffer to the right length. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) skb_trim(skb, sizeof(struct sctp_assoc_change) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ntohs(chunk->chunk_hdr->length) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) sizeof(struct sctp_chunkhdr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) event = sctp_ulpevent_new(sizeof(struct sctp_assoc_change),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) sac = skb_put(skb, sizeof(struct sctp_assoc_change));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * 5.3.1.1 SCTP_ASSOC_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * sac_type:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * It should be SCTP_ASSOC_CHANGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) sac->sac_type = SCTP_ASSOC_CHANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * 5.3.1.1 SCTP_ASSOC_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * sac_state: 32 bits (signed integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * This field holds one of a number of values that communicate the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * event that happened to the association.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) sac->sac_state = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * 5.3.1.1 SCTP_ASSOC_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * sac_flags: 16 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * Currently unused.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) sac->sac_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * 5.3.1.1 SCTP_ASSOC_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * sac_length: sizeof (__u32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * This field is the total length of the notification data, including
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * the notification header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) sac->sac_length = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * 5.3.1.1 SCTP_ASSOC_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * sac_error: 32 bits (signed integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * If the state was reached due to a error condition (e.g.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * COMMUNICATION_LOST) any relevant error information is available in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * this field. This corresponds to the protocol error codes defined in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * [SCTP].
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) sac->sac_error = error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * 5.3.1.1 SCTP_ASSOC_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * sac_outbound_streams: 16 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * sac_inbound_streams: 16 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * The maximum number of streams allowed in each direction are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * available in sac_outbound_streams and sac_inbound streams.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) sac->sac_outbound_streams = outbound;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) sac->sac_inbound_streams = inbound;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * 5.3.1.1 SCTP_ASSOC_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * sac_assoc_id: sizeof (sctp_assoc_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * The association id field, holds the identifier for the association.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * All notifications for a given association have the same association
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * identifier. For TCP style socket, this field is ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) sac->sac_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) /* Create and initialize an SCTP_PEER_ADDR_CHANGE event.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * Socket Extensions for SCTP - draft-01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * When a destination address on a multi-homed peer encounters a change
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * an interface details event is sent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) const struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) const struct sockaddr_storage *aaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) int flags, int state, int error, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) struct sctp_paddr_change *spc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) event = sctp_ulpevent_new(sizeof(struct sctp_paddr_change),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) spc = skb_put(skb, sizeof(struct sctp_paddr_change));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /* Sockets API Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) * spc_type:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * It should be SCTP_PEER_ADDR_CHANGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) spc->spc_type = SCTP_PEER_ADDR_CHANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /* Sockets API Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * spc_length: sizeof (__u32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) * This field is the total length of the notification data, including
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * the notification header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) spc->spc_length = sizeof(struct sctp_paddr_change);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) /* Sockets API Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * spc_flags: 16 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * Currently unused.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) spc->spc_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) /* Sockets API Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * spc_state: 32 bits (signed integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) * This field holds one of a number of values that communicate the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) * event that happened to the address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) spc->spc_state = state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) /* Sockets API Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * spc_error: 32 bits (signed integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * If the state was reached due to any error condition (e.g.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * ADDRESS_UNREACHABLE) any relevant error information is available in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * this field.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) spc->spc_error = error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * 5.3.1.1 SCTP_ASSOC_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * spc_assoc_id: sizeof (sctp_assoc_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * The association id field, holds the identifier for the association.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) * All notifications for a given association have the same association
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) * identifier. For TCP style socket, this field is ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) spc->spc_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* Sockets API Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * Section 5.3.1.2 SCTP_PEER_ADDR_CHANGE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * spc_aaddr: sizeof (struct sockaddr_storage)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) * The affected address field, holds the remote peer's address that is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) * encountering the change of state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) memcpy(&spc->spc_aaddr, aaddr, sizeof(struct sockaddr_storage));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) /* Map ipv4 address into v4-mapped-on-v6 address. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) sctp_get_pf_specific(asoc->base.sk->sk_family)->addr_to_user(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) sctp_sk(asoc->base.sk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) (union sctp_addr *)&spc->spc_aaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) void sctp_ulpevent_notify_peer_addr_change(struct sctp_transport *transport,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) int state, int error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct sctp_association *asoc = transport->asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) struct sockaddr_storage addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (asoc->state < SCTP_STATE_ESTABLISHED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) memset(&addr, 0, sizeof(struct sockaddr_storage));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) memcpy(&addr, &transport->ipaddr, transport->af_specific->sockaddr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) event = sctp_ulpevent_make_peer_addr_change(asoc, &addr, 0, state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) error, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) asoc->stream.si->enqueue_event(&asoc->ulpq, event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /* Create and initialize an SCTP_REMOTE_ERROR notification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * Note: This assumes that the chunk->skb->data already points to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * operation error payload.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) * Socket Extensions for SCTP - draft-01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) * 5.3.1.3 SCTP_REMOTE_ERROR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) * A remote peer may send an Operational Error message to its peer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) * This message indicates a variety of error conditions on an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * association. The entire error TLV as it appears on the wire is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) * included in a SCTP_REMOTE_ERROR event. Please refer to the SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) * specification [SCTP] and any extensions for a list of possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * error formats.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) struct sctp_ulpevent *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) sctp_ulpevent_make_remote_error(const struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) struct sctp_chunk *chunk, __u16 flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct sctp_remote_error *sre;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) struct sctp_errhdr *ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) __be16 cause;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) int elen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) ch = (struct sctp_errhdr *)(chunk->skb->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) cause = ch->cause;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) elen = SCTP_PAD4(ntohs(ch->length)) - sizeof(*ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) /* Pull off the ERROR header. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) skb_pull(chunk->skb, sizeof(*ch));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /* Copy the skb to a new skb with room for us to prepend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) * notification with.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) skb = skb_copy_expand(chunk->skb, sizeof(*sre), 0, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) /* Pull off the rest of the cause TLV from the chunk. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) skb_pull(chunk->skb, elen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /* Embed the event fields inside the cloned skb. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) event = sctp_skb2event(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) sre = skb_push(skb, sizeof(*sre));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) /* Trim the buffer to the right length. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) skb_trim(skb, sizeof(*sre) + elen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) /* RFC6458, Section 6.1.3. SCTP_REMOTE_ERROR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) memset(sre, 0, sizeof(*sre));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) sre->sre_type = SCTP_REMOTE_ERROR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) sre->sre_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) sre->sre_length = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) sre->sre_error = cause;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) sre->sre_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) /* Create and initialize a SCTP_SEND_FAILED notification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * Socket Extensions for SCTP - draft-01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * 5.3.1.4 SCTP_SEND_FAILED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) struct sctp_ulpevent *sctp_ulpevent_make_send_failed(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) const struct sctp_association *asoc, struct sctp_chunk *chunk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) __u16 flags, __u32 error, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) struct sctp_send_failed *ssf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) /* Pull off any padding. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) int len = ntohs(chunk->chunk_hdr->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) /* Make skb with more room so we can prepend notification. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) skb = skb_copy_expand(chunk->skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) sizeof(struct sctp_send_failed), /* headroom */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 0, /* tailroom */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /* Pull off the common chunk header and DATA header. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) skb_pull(skb, sctp_datachk_len(&asoc->stream));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) len -= sctp_datachk_len(&asoc->stream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) /* Embed the event fields inside the cloned skb. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) event = sctp_skb2event(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) ssf = skb_push(skb, sizeof(struct sctp_send_failed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) * 5.3.1.4 SCTP_SEND_FAILED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) * ssf_type:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) * It should be SCTP_SEND_FAILED.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) ssf->ssf_type = SCTP_SEND_FAILED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) * 5.3.1.4 SCTP_SEND_FAILED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) * ssf_flags: 16 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * The flag value will take one of the following values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) * SCTP_DATA_UNSENT - Indicates that the data was never put on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * the wire.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) * SCTP_DATA_SENT - Indicates that the data was put on the wire.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) * Note that this does not necessarily mean that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) * data was (or was not) successfully delivered.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) ssf->ssf_flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) * 5.3.1.4 SCTP_SEND_FAILED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) * ssf_length: sizeof (__u32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) * This field is the total length of the notification data, including
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) * the notification header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) ssf->ssf_length = sizeof(struct sctp_send_failed) + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) skb_trim(skb, ssf->ssf_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) * 5.3.1.4 SCTP_SEND_FAILED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) * ssf_error: 16 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) * This value represents the reason why the send failed, and if set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) * will be a SCTP protocol error code as defined in [SCTP] section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * 3.3.10.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) ssf->ssf_error = error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) * 5.3.1.4 SCTP_SEND_FAILED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) * ssf_info: sizeof (struct sctp_sndrcvinfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) * The original send information associated with the undelivered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) * message.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) memcpy(&ssf->ssf_info, &chunk->sinfo, sizeof(struct sctp_sndrcvinfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) /* Per TSVWG discussion with Randy. Allow the application to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) * reassemble a fragmented message.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) ssf->ssf_info.sinfo_flags = chunk->chunk_hdr->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * 5.3.1.4 SCTP_SEND_FAILED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * ssf_assoc_id: sizeof (sctp_assoc_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * The association id field, sf_assoc_id, holds the identifier for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) * association. All notifications for a given association have the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) * same association identifier. For TCP style socket, this field is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) * ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) ssf->ssf_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) struct sctp_ulpevent *sctp_ulpevent_make_send_failed_event(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) const struct sctp_association *asoc, struct sctp_chunk *chunk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) __u16 flags, __u32 error, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) struct sctp_send_failed_event *ssf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) skb = skb_copy_expand(chunk->skb, sizeof(*ssf), 0, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) len = ntohs(chunk->chunk_hdr->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) len -= sctp_datachk_len(&asoc->stream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) skb_pull(skb, sctp_datachk_len(&asoc->stream));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) event = sctp_skb2event(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) ssf = skb_push(skb, sizeof(*ssf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) ssf->ssf_type = SCTP_SEND_FAILED_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) ssf->ssf_flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) ssf->ssf_length = sizeof(*ssf) + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) skb_trim(skb, ssf->ssf_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) ssf->ssf_error = error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) ssf->ssfe_info.snd_sid = chunk->sinfo.sinfo_stream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) ssf->ssfe_info.snd_ppid = chunk->sinfo.sinfo_ppid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) ssf->ssfe_info.snd_context = chunk->sinfo.sinfo_context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) ssf->ssfe_info.snd_assoc_id = chunk->sinfo.sinfo_assoc_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) ssf->ssfe_info.snd_flags = chunk->chunk_hdr->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) ssf->ssf_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) /* Create and initialize a SCTP_SHUTDOWN_EVENT notification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * Socket Extensions for SCTP - draft-01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * 5.3.1.5 SCTP_SHUTDOWN_EVENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) const struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) __u16 flags, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) struct sctp_shutdown_event *sse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) event = sctp_ulpevent_new(sizeof(struct sctp_shutdown_event),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) sse = skb_put(skb, sizeof(struct sctp_shutdown_event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * 5.3.1.5 SCTP_SHUTDOWN_EVENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) * sse_type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) * It should be SCTP_SHUTDOWN_EVENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) sse->sse_type = SCTP_SHUTDOWN_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) * 5.3.1.5 SCTP_SHUTDOWN_EVENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) * sse_flags: 16 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) * Currently unused.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) sse->sse_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * 5.3.1.5 SCTP_SHUTDOWN_EVENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) * sse_length: sizeof (__u32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * This field is the total length of the notification data, including
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) * the notification header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) sse->sse_length = sizeof(struct sctp_shutdown_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) /* Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * 5.3.1.5 SCTP_SHUTDOWN_EVENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) * sse_assoc_id: sizeof (sctp_assoc_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) * The association id field, holds the identifier for the association.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) * All notifications for a given association have the same association
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) * identifier. For TCP style socket, this field is ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) sse->sse_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) /* Create and initialize a SCTP_ADAPTATION_INDICATION notification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) * Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) * 5.3.1.6 SCTP_ADAPTATION_INDICATION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) struct sctp_ulpevent *sctp_ulpevent_make_adaptation_indication(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) const struct sctp_association *asoc, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) struct sctp_adaptation_event *sai;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) event = sctp_ulpevent_new(sizeof(struct sctp_adaptation_event),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) sai = skb_put(skb, sizeof(struct sctp_adaptation_event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) sai->sai_type = SCTP_ADAPTATION_INDICATION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) sai->sai_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) sai->sai_length = sizeof(struct sctp_adaptation_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) sai->sai_adaptation_ind = asoc->peer.adaptation_ind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) sai->sai_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) /* A message has been received. Package this message as a notification
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) * to pass it to the upper layers. Go ahead and calculate the sndrcvinfo
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) * even if filtered out later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) * Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) * 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) struct sctp_chunk *chunk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) struct sctp_ulpevent *event = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) struct sk_buff *skb = chunk->skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) struct sock *sk = asoc->base.sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) size_t padding, datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) int rx_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) * check to see if we need to make space for this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) * new skb, expand the rcvbuffer if needed, or drop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) * the frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) if (asoc->ep->rcvbuf_policy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) rx_count = atomic_read(&asoc->rmem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) rx_count = atomic_read(&sk->sk_rmem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) datalen = ntohs(chunk->chunk_hdr->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) if (rx_count >= sk->sk_rcvbuf || !sk_rmem_schedule(sk, skb, datalen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) /* Clone the original skb, sharing the data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) skb = skb_clone(chunk->skb, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) /* Now that all memory allocations for this chunk succeeded, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) * can mark it as received so the tsn_map is updated correctly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) if (sctp_tsnmap_mark(&asoc->peer.tsn_map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) ntohl(chunk->subh.data_hdr->tsn),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) chunk->transport))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) goto fail_mark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) /* First calculate the padding, so we don't inadvertently
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) * pass up the wrong length to the user.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) * RFC 2960 - Section 3.2 Chunk Field Descriptions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) * The total length of a chunk(including Type, Length and Value fields)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) * MUST be a multiple of 4 bytes. If the length of the chunk is not a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) * multiple of 4 bytes, the sender MUST pad the chunk with all zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) * bytes and this padding is not included in the chunk length field.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) * The sender should never pad with more than 3 bytes. The receiver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * MUST ignore the padding bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) padding = SCTP_PAD4(datalen) - datalen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) /* Fixup cloned skb with just this chunks data. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) skb_trim(skb, chunk->chunk_end - padding - skb->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) /* Embed the event fields inside the cloned skb. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) event = sctp_skb2event(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) /* Initialize event with flags 0 and correct length
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) * Since this is a clone of the original skb, only account for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) * the data of this chunk as other chunks will be accounted separately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) sctp_ulpevent_init(event, 0, skb->len + sizeof(struct sk_buff));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) /* And hold the chunk as we need it for getting the IP headers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) * later in recvmsg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) sctp_chunk_hold(chunk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) event->chunk = chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) sctp_ulpevent_receive_data(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) event->stream = ntohs(chunk->subh.data_hdr->stream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) if (chunk->chunk_hdr->flags & SCTP_DATA_UNORDERED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) event->flags |= SCTP_UNORDERED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) event->cumtsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) event->tsn = ntohl(chunk->subh.data_hdr->tsn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) event->msg_flags |= chunk->chunk_hdr->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) fail_mark:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) /* Create a partial delivery related event.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) * When a receiver is engaged in a partial delivery of a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) * message this notification will be used to indicate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) * various events.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) struct sctp_ulpevent *sctp_ulpevent_make_pdapi(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) const struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) __u32 indication, __u32 sid, __u32 seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) __u32 flags, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) struct sctp_pdapi_event *pd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) event = sctp_ulpevent_new(sizeof(struct sctp_pdapi_event),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) pd = skb_put(skb, sizeof(struct sctp_pdapi_event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) /* pdapi_type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) * It should be SCTP_PARTIAL_DELIVERY_EVENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) * pdapi_flags: 16 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) * Currently unused.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) pd->pdapi_type = SCTP_PARTIAL_DELIVERY_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) pd->pdapi_flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) pd->pdapi_stream = sid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) pd->pdapi_seq = seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) /* pdapi_length: 32 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) * This field is the total length of the notification data, including
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) * the notification header. It will generally be sizeof (struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) * sctp_pdapi_event).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) pd->pdapi_length = sizeof(struct sctp_pdapi_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) /* pdapi_indication: 32 bits (unsigned integer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) * This field holds the indication being sent to the application.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) pd->pdapi_indication = indication;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) /* pdapi_assoc_id: sizeof (sctp_assoc_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) * The association id field, holds the identifier for the association.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) pd->pdapi_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) struct sctp_ulpevent *sctp_ulpevent_make_authkey(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) const struct sctp_association *asoc, __u16 key_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) __u32 indication, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) struct sctp_authkey_event *ak;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) event = sctp_ulpevent_new(sizeof(struct sctp_authkey_event),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) ak = skb_put(skb, sizeof(struct sctp_authkey_event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) ak->auth_type = SCTP_AUTHENTICATION_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) ak->auth_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) ak->auth_length = sizeof(struct sctp_authkey_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) ak->auth_keynumber = key_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) ak->auth_altkeynumber = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) ak->auth_indication = indication;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) * The association id field, holds the identifier for the association.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) ak->auth_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) * Socket Extensions for SCTP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) * 6.3.10. SCTP_SENDER_DRY_EVENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) const struct sctp_association *asoc, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) struct sctp_sender_dry_event *sdry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) event = sctp_ulpevent_new(sizeof(struct sctp_sender_dry_event),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) sdry = skb_put(skb, sizeof(struct sctp_sender_dry_event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) sdry->sender_dry_type = SCTP_SENDER_DRY_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) sdry->sender_dry_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) sdry->sender_dry_length = sizeof(struct sctp_sender_dry_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) sdry->sender_dry_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) struct sctp_ulpevent *sctp_ulpevent_make_stream_reset_event(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) const struct sctp_association *asoc, __u16 flags, __u16 stream_num,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) __be16 *stream_list, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) struct sctp_stream_reset_event *sreset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) int length, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) length = sizeof(struct sctp_stream_reset_event) + 2 * stream_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) event = sctp_ulpevent_new(length, MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) sreset = skb_put(skb, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) sreset->strreset_type = SCTP_STREAM_RESET_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) sreset->strreset_flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) sreset->strreset_length = length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) sreset->strreset_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) for (i = 0; i < stream_num; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) sreset->strreset_stream_list[i] = ntohs(stream_list[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) struct sctp_ulpevent *sctp_ulpevent_make_assoc_reset_event(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) const struct sctp_association *asoc, __u16 flags, __u32 local_tsn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) __u32 remote_tsn, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) struct sctp_assoc_reset_event *areset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) event = sctp_ulpevent_new(sizeof(struct sctp_assoc_reset_event),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) areset = skb_put(skb, sizeof(struct sctp_assoc_reset_event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) areset->assocreset_type = SCTP_ASSOC_RESET_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) areset->assocreset_flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) areset->assocreset_length = sizeof(struct sctp_assoc_reset_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) areset->assocreset_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) areset->assocreset_local_tsn = local_tsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) areset->assocreset_remote_tsn = remote_tsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) struct sctp_ulpevent *sctp_ulpevent_make_stream_change_event(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) const struct sctp_association *asoc, __u16 flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) __u32 strchange_instrms, __u32 strchange_outstrms, gfp_t gfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) struct sctp_stream_change_event *schange;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) struct sctp_ulpevent *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) event = sctp_ulpevent_new(sizeof(struct sctp_stream_change_event),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) MSG_NOTIFICATION, gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) if (!event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) schange = skb_put(skb, sizeof(struct sctp_stream_change_event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) schange->strchange_type = SCTP_STREAM_CHANGE_EVENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) schange->strchange_flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) schange->strchange_length = sizeof(struct sctp_stream_change_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) schange->strchange_assoc_id = sctp_assoc2id(asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) schange->strchange_instrms = strchange_instrms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) schange->strchange_outstrms = strchange_outstrms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) return event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) /* Return the notification type, assuming this is a notification
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) * event.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) __u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) union sctp_notification *notification;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) notification = (union sctp_notification *) skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) return notification->sn_header.sn_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) /* RFC6458, Section 5.3.2. SCTP Header Information Structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) * (SCTP_SNDRCV, DEPRECATED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) struct msghdr *msghdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) struct sctp_sndrcvinfo sinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) if (sctp_ulpevent_is_notification(event))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) memset(&sinfo, 0, sizeof(sinfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) sinfo.sinfo_stream = event->stream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) sinfo.sinfo_ssn = event->ssn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) sinfo.sinfo_ppid = event->ppid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) sinfo.sinfo_flags = event->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) sinfo.sinfo_tsn = event->tsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) sinfo.sinfo_cumtsn = event->cumtsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) sinfo.sinfo_assoc_id = sctp_assoc2id(event->asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) /* Context value that is set via SCTP_CONTEXT socket option. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) sinfo.sinfo_context = event->asoc->default_rcv_context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) /* These fields are not used while receiving. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) sinfo.sinfo_timetolive = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) put_cmsg(msghdr, IPPROTO_SCTP, SCTP_SNDRCV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) sizeof(sinfo), &sinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) /* RFC6458, Section 5.3.5 SCTP Receive Information Structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) * (SCTP_SNDRCV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) void sctp_ulpevent_read_rcvinfo(const struct sctp_ulpevent *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) struct msghdr *msghdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) struct sctp_rcvinfo rinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) if (sctp_ulpevent_is_notification(event))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) memset(&rinfo, 0, sizeof(struct sctp_rcvinfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) rinfo.rcv_sid = event->stream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) rinfo.rcv_ssn = event->ssn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) rinfo.rcv_ppid = event->ppid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) rinfo.rcv_flags = event->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) rinfo.rcv_tsn = event->tsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) rinfo.rcv_cumtsn = event->cumtsn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) rinfo.rcv_assoc_id = sctp_assoc2id(event->asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) rinfo.rcv_context = event->asoc->default_rcv_context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) put_cmsg(msghdr, IPPROTO_SCTP, SCTP_RCVINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) sizeof(rinfo), &rinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) /* RFC6458, Section 5.3.6. SCTP Next Receive Information Structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) * (SCTP_NXTINFO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) static void __sctp_ulpevent_read_nxtinfo(const struct sctp_ulpevent *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) struct msghdr *msghdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) const struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) struct sctp_nxtinfo nxtinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) memset(&nxtinfo, 0, sizeof(nxtinfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) nxtinfo.nxt_sid = event->stream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) nxtinfo.nxt_ppid = event->ppid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) nxtinfo.nxt_flags = event->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) if (sctp_ulpevent_is_notification(event))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) nxtinfo.nxt_flags |= SCTP_NOTIFICATION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) nxtinfo.nxt_length = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) nxtinfo.nxt_assoc_id = sctp_assoc2id(event->asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) put_cmsg(msghdr, IPPROTO_SCTP, SCTP_NXTINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) sizeof(nxtinfo), &nxtinfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) void sctp_ulpevent_read_nxtinfo(const struct sctp_ulpevent *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) struct msghdr *msghdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) skb = sctp_skb_recv_datagram(sk, MSG_PEEK, 1, &err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) if (skb != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) __sctp_ulpevent_read_nxtinfo(sctp_skb2event(skb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) msghdr, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) /* Just release refcount here. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) /* Do accounting for bytes received and hold a reference to the association
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) * for each skb.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) static void sctp_ulpevent_receive_data(struct sctp_ulpevent *event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) struct sctp_association *asoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) struct sk_buff *skb, *frag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) /* Set the owner and charge rwnd for bytes received. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) sctp_ulpevent_set_owner(event, asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) sctp_assoc_rwnd_decrease(asoc, skb_headlen(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) if (!skb->data_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) /* Note: Not clearing the entire event struct as this is just a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) * fragment of the real event. However, we still need to do rwnd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) * accounting.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) * In general, the skb passed from IP can have only 1 level of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) * fragments. But we allow multiple levels of fragments.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) skb_walk_frags(skb, frag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) sctp_ulpevent_receive_data(sctp_skb2event(frag), asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) /* Do accounting for bytes just read by user and release the references to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) * the association.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) static void sctp_ulpevent_release_data(struct sctp_ulpevent *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) struct sk_buff *skb, *frag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) /* Current stack structures assume that the rcv buffer is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) * per socket. For UDP style sockets this is not true as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) * multiple associations may be on a single UDP-style socket.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) * Use the local private area of the skb to track the owning
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) * association.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) len = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) if (!skb->data_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) /* Don't forget the fragments. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) skb_walk_frags(skb, frag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) /* NOTE: skb_shinfos are recursive. Although IP returns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) * skb's with only 1 level of fragments, SCTP reassembly can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) * increase the levels.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) sctp_ulpevent_release_frag_data(sctp_skb2event(frag));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) sctp_assoc_rwnd_increase(event->asoc, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) sctp_chunk_put(event->chunk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) sctp_ulpevent_release_owner(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) static void sctp_ulpevent_release_frag_data(struct sctp_ulpevent *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) struct sk_buff *skb, *frag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) skb = sctp_event2skb(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) if (!skb->data_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) /* Don't forget the fragments. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) skb_walk_frags(skb, frag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) /* NOTE: skb_shinfos are recursive. Although IP returns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) * skb's with only 1 level of fragments, SCTP reassembly can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) * increase the levels.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) sctp_ulpevent_release_frag_data(sctp_skb2event(frag));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) sctp_chunk_put(event->chunk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) sctp_ulpevent_release_owner(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) /* Free a ulpevent that has an owner. It includes releasing the reference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) * to the owner, updating the rwnd in case of a DATA event and freeing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) * skb.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) void sctp_ulpevent_free(struct sctp_ulpevent *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) if (sctp_ulpevent_is_notification(event))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) sctp_ulpevent_release_owner(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) sctp_ulpevent_release_data(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) kfree_skb(sctp_event2skb(event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) /* Purge the skb lists holding ulpevents. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) unsigned int sctp_queue_purge_ulpevents(struct sk_buff_head *list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) unsigned int data_unread = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) while ((skb = skb_dequeue(list)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) struct sctp_ulpevent *event = sctp_skb2event(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) if (!sctp_ulpevent_is_notification(event))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) data_unread += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) sctp_ulpevent_free(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) return data_unread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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