+ struct sctp_sock *sp = sctp_sk(sk);
+
+ /* Applicable to UDP-style socket only */
+ if (sctp_style(sk, TCP))
+ return -EOPNOTSUPP;
+ if (optlen != sizeof(int))
+ return -EINVAL;
+ if (copy_from_user(&sp->autoclose, optval, optlen))
+ return -EFAULT;
+
+ return 0;
+}
+
+/* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
+ *
+ * Applications can enable or disable heartbeats for any peer address of
+ * an association, modify an address's heartbeat interval, force a
+ * heartbeat to be sent immediately, and adjust the address's maximum
+ * number of retransmissions sent before an address is considered
+ * unreachable. The following structure is used to access and modify an
+ * address's parameters:
+ *
+ * struct sctp_paddrparams {
+ * sctp_assoc_t spp_assoc_id;
+ * struct sockaddr_storage spp_address;
+ * uint32_t spp_hbinterval;
+ * uint16_t spp_pathmaxrxt;
+ * uint32_t spp_pathmtu;
+ * uint32_t spp_sackdelay;
+ * uint32_t spp_flags;
+ * };
+ *
+ * spp_assoc_id - (one-to-many style socket) This is filled in the
+ * application, and identifies the association for
+ * this query.
+ * spp_address - This specifies which address is of interest.
+ * spp_hbinterval - This contains the value of the heartbeat interval,
+ * in milliseconds. If a value of zero
+ * is present in this field then no changes are to
+ * be made to this parameter.
+ * spp_pathmaxrxt - This contains the maximum number of
+ * retransmissions before this address shall be
+ * considered unreachable. If a value of zero
+ * is present in this field then no changes are to
+ * be made to this parameter.
+ * spp_pathmtu - When Path MTU discovery is disabled the value
+ * specified here will be the "fixed" path mtu.
+ * Note that if the spp_address field is empty
+ * then all associations on this address will
+ * have this fixed path mtu set upon them.
+ *
+ * spp_sackdelay - When delayed sack is enabled, this value specifies
+ * the number of milliseconds that sacks will be delayed
+ * for. This value will apply to all addresses of an
+ * association if the spp_address field is empty. Note
+ * also, that if delayed sack is enabled and this
+ * value is set to 0, no change is made to the last
+ * recorded delayed sack timer value.
+ *
+ * spp_flags - These flags are used to control various features
+ * on an association. The flag field may contain
+ * zero or more of the following options.
+ *
+ * SPP_HB_ENABLE - Enable heartbeats on the
+ * specified address. Note that if the address
+ * field is empty all addresses for the association
+ * have heartbeats enabled upon them.
+ *
+ * SPP_HB_DISABLE - Disable heartbeats on the
+ * speicifed address. Note that if the address
+ * field is empty all addresses for the association
+ * will have their heartbeats disabled. Note also
+ * that SPP_HB_ENABLE and SPP_HB_DISABLE are
+ * mutually exclusive, only one of these two should
+ * be specified. Enabling both fields will have
+ * undetermined results.
+ *
+ * SPP_HB_DEMAND - Request a user initiated heartbeat
+ * to be made immediately.
+ *
+ * SPP_PMTUD_ENABLE - This field will enable PMTU
+ * discovery upon the specified address. Note that
+ * if the address feild is empty then all addresses
+ * on the association are effected.
+ *
+ * SPP_PMTUD_DISABLE - This field will disable PMTU
+ * discovery upon the specified address. Note that
+ * if the address feild is empty then all addresses
+ * on the association are effected. Not also that
+ * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
+ * exclusive. Enabling both will have undetermined
+ * results.
+ *
+ * SPP_SACKDELAY_ENABLE - Setting this flag turns
+ * on delayed sack. The time specified in spp_sackdelay
+ * is used to specify the sack delay for this address. Note
+ * that if spp_address is empty then all addresses will
+ * enable delayed sack and take on the sack delay
+ * value specified in spp_sackdelay.
+ * SPP_SACKDELAY_DISABLE - Setting this flag turns
+ * off delayed sack. If the spp_address field is blank then
+ * delayed sack is disabled for the entire association. Note
+ * also that this field is mutually exclusive to
+ * SPP_SACKDELAY_ENABLE, setting both will have undefined
+ * results.
+ */
+static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
+ struct sctp_transport *trans,
+ struct sctp_association *asoc,
+ struct sctp_sock *sp,
+ int hb_change,
+ int pmtud_change,
+ int sackdelay_change)
+{
+ int error;
+
+ if (params->spp_flags & SPP_HB_DEMAND && trans) {
+ error = sctp_primitive_REQUESTHEARTBEAT (trans->asoc, trans);
+ if (error)
+ return error;
+ }
+
+ if (params->spp_hbinterval) {
+ if (trans) {
+ trans->hbinterval = msecs_to_jiffies(params->spp_hbinterval);
+ } else if (asoc) {
+ asoc->hbinterval = msecs_to_jiffies(params->spp_hbinterval);
+ } else {
+ sp->hbinterval = params->spp_hbinterval;
+ }
+ }
+
+ if (hb_change) {
+ if (trans) {
+ trans->param_flags =
+ (trans->param_flags & ~SPP_HB) | hb_change;
+ } else if (asoc) {
+ asoc->param_flags =
+ (asoc->param_flags & ~SPP_HB) | hb_change;
+ } else {
+ sp->param_flags =
+ (sp->param_flags & ~SPP_HB) | hb_change;
+ }
+ }
+
+ if (params->spp_pathmtu) {
+ if (trans) {
+ trans->pathmtu = params->spp_pathmtu;
+ sctp_assoc_sync_pmtu(asoc);
+ } else if (asoc) {
+ asoc->pathmtu = params->spp_pathmtu;
+ sctp_frag_point(sp, params->spp_pathmtu);
+ } else {
+ sp->pathmtu = params->spp_pathmtu;
+ }
+ }
+
+ if (pmtud_change) {
+ if (trans) {
+ int update = (trans->param_flags & SPP_PMTUD_DISABLE) &&
+ (params->spp_flags & SPP_PMTUD_ENABLE);
+ trans->param_flags =
+ (trans->param_flags & ~SPP_PMTUD) | pmtud_change;
+ if (update) {
+ sctp_transport_pmtu(trans);
+ sctp_assoc_sync_pmtu(asoc);
+ }
+ } else if (asoc) {
+ asoc->param_flags =
+ (asoc->param_flags & ~SPP_PMTUD) | pmtud_change;
+ } else {
+ sp->param_flags =
+ (sp->param_flags & ~SPP_PMTUD) | pmtud_change;
+ }
+ }
+
+ if (params->spp_sackdelay) {
+ if (trans) {
+ trans->sackdelay =
+ msecs_to_jiffies(params->spp_sackdelay);
+ } else if (asoc) {
+ asoc->sackdelay =
+ msecs_to_jiffies(params->spp_sackdelay);
+ } else {
+ sp->sackdelay = params->spp_sackdelay;
+ }
+ }
+
+ if (sackdelay_change) {
+ if (trans) {
+ trans->param_flags =
+ (trans->param_flags & ~SPP_SACKDELAY) |
+ sackdelay_change;
+ } else if (asoc) {
+ asoc->param_flags =
+ (asoc->param_flags & ~SPP_SACKDELAY) |
+ sackdelay_change;
+ } else {
+ sp->param_flags =
+ (sp->param_flags & ~SPP_SACKDELAY) |
+ sackdelay_change;
+ }
+ }
+
+ if (params->spp_pathmaxrxt) {
+ if (trans) {
+ trans->pathmaxrxt = params->spp_pathmaxrxt;
+ } else if (asoc) {
+ asoc->pathmaxrxt = params->spp_pathmaxrxt;
+ } else {
+ sp->pathmaxrxt = params->spp_pathmaxrxt;
+ }
+ }
+
+ return 0;
+}
+
+static int sctp_setsockopt_peer_addr_params(struct sock *sk,
+ char __user *optval, int optlen)
+{
+ struct sctp_paddrparams params;
+ struct sctp_transport *trans = NULL;
+ struct sctp_association *asoc = NULL;
+ struct sctp_sock *sp = sctp_sk(sk);
+ int error;
+ int hb_change, pmtud_change, sackdelay_change;
+
+ if (optlen != sizeof(struct sctp_paddrparams))
+ return - EINVAL;
+
+ if (copy_from_user(¶ms, optval, optlen))
+ return -EFAULT;
+
+ /* Validate flags and value parameters. */
+ hb_change = params.spp_flags & SPP_HB;
+ pmtud_change = params.spp_flags & SPP_PMTUD;
+ sackdelay_change = params.spp_flags & SPP_SACKDELAY;
+
+ if (hb_change == SPP_HB ||
+ pmtud_change == SPP_PMTUD ||
+ sackdelay_change == SPP_SACKDELAY ||
+ params.spp_sackdelay > 500 ||
+ (params.spp_pathmtu
+ && params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT))
+ return -EINVAL;
+
+ /* If an address other than INADDR_ANY is specified, and
+ * no transport is found, then the request is invalid.
+ */
+ if (!sctp_is_any(( union sctp_addr *)¶ms.spp_address)) {
+ trans = sctp_addr_id2transport(sk, ¶ms.spp_address,
+ params.spp_assoc_id);
+ if (!trans)
+ return -EINVAL;
+ }