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-rw-r--r--netwerk/sctp/src/netinet/sctp_peeloff.c302
1 files changed, 302 insertions, 0 deletions
diff --git a/netwerk/sctp/src/netinet/sctp_peeloff.c b/netwerk/sctp/src/netinet/sctp_peeloff.c
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index 0000000000..548c3d82b2
--- /dev/null
+++ b/netwerk/sctp/src/netinet/sctp_peeloff.c
@@ -0,0 +1,302 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
+ * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * a) Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * b) Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the distribution.
+ *
+ * c) Neither the name of Cisco Systems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+#endif
+
+#include <netinet/sctp_os.h>
+#include <netinet/sctp_pcb.h>
+#include <netinet/sctputil.h>
+#include <netinet/sctp_var.h>
+#include <netinet/sctp_var.h>
+#include <netinet/sctp_sysctl.h>
+#include <netinet/sctp.h>
+#include <netinet/sctp_uio.h>
+#include <netinet/sctp_peeloff.h>
+#include <netinet/sctputil.h>
+#include <netinet/sctp_auth.h>
+
+int
+sctp_can_peel_off(struct socket *head, sctp_assoc_t assoc_id)
+{
+ struct sctp_inpcb *inp;
+ struct sctp_tcb *stcb;
+ uint32_t state;
+
+ if (head == NULL) {
+ SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EBADF);
+ return (EBADF);
+ }
+ inp = (struct sctp_inpcb *)head->so_pcb;
+ if (inp == NULL) {
+ SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
+ return (EFAULT);
+ }
+ if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
+ (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
+ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EOPNOTSUPP);
+ return (EOPNOTSUPP);
+ }
+ stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
+ if (stcb == NULL) {
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOENT);
+ return (ENOENT);
+ }
+ state = SCTP_GET_STATE(stcb);
+ if ((state == SCTP_STATE_EMPTY) ||
+ (state == SCTP_STATE_INUSE)) {
+ SCTP_TCB_UNLOCK(stcb);
+ SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
+ return (ENOTCONN);
+ }
+ SCTP_TCB_UNLOCK(stcb);
+ /* We are clear to peel this one off */
+ return (0);
+}
+
+int
+sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id)
+{
+ struct sctp_inpcb *inp, *n_inp;
+ struct sctp_tcb *stcb;
+ uint32_t state;
+
+ inp = (struct sctp_inpcb *)head->so_pcb;
+ if (inp == NULL) {
+ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
+ return (EFAULT);
+ }
+ stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
+ if (stcb == NULL) {
+ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
+ return (ENOTCONN);
+ }
+
+ state = SCTP_GET_STATE(stcb);
+ if ((state == SCTP_STATE_EMPTY) ||
+ (state == SCTP_STATE_INUSE)) {
+ SCTP_TCB_UNLOCK(stcb);
+ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
+ return (ENOTCONN);
+ }
+
+ n_inp = (struct sctp_inpcb *)so->so_pcb;
+ n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
+ SCTP_PCB_FLAGS_CONNECTED |
+ SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
+ (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
+ n_inp->sctp_socket = so;
+ n_inp->sctp_features = inp->sctp_features;
+ n_inp->sctp_mobility_features = inp->sctp_mobility_features;
+ n_inp->sctp_frag_point = inp->sctp_frag_point;
+ n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off;
+ n_inp->ecn_supported = inp->ecn_supported;
+ n_inp->prsctp_supported = inp->prsctp_supported;
+ n_inp->auth_supported = inp->auth_supported;
+ n_inp->asconf_supported = inp->asconf_supported;
+ n_inp->reconfig_supported = inp->reconfig_supported;
+ n_inp->nrsack_supported = inp->nrsack_supported;
+ n_inp->pktdrop_supported = inp->pktdrop_supported;
+ n_inp->partial_delivery_point = inp->partial_delivery_point;
+ n_inp->sctp_context = inp->sctp_context;
+ n_inp->max_cwnd = inp->max_cwnd;
+ n_inp->local_strreset_support = inp->local_strreset_support;
+ /* copy in the authentication parameters from the original endpoint */
+ if (n_inp->sctp_ep.local_hmacs)
+ sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
+ n_inp->sctp_ep.local_hmacs =
+ sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
+ if (n_inp->sctp_ep.local_auth_chunks)
+ sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
+ n_inp->sctp_ep.local_auth_chunks =
+ sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
+ (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
+ &n_inp->sctp_ep.shared_keys);
+#if defined(__Userspace__)
+ n_inp->ulp_info = inp->ulp_info;
+ n_inp->recv_callback = inp->recv_callback;
+ n_inp->send_callback = inp->send_callback;
+ n_inp->send_sb_threshold = inp->send_sb_threshold;
+#endif
+ /*
+ * Now we must move it from one hash table to another and get the
+ * stcb in the right place.
+ */
+ sctp_move_pcb_and_assoc(inp, n_inp, stcb);
+ atomic_add_int(&stcb->asoc.refcnt, 1);
+ SCTP_TCB_UNLOCK(stcb);
+
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+ sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
+#else
+ sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK);
+#endif
+ atomic_subtract_int(&stcb->asoc.refcnt, 1);
+
+ return (0);
+}
+
+#if defined(HAVE_SCTP_PEELOFF_SOCKOPT)
+struct socket *
+sctp_get_peeloff(struct socket *head, sctp_assoc_t assoc_id, int *error)
+{
+ struct socket *newso;
+ struct sctp_inpcb *inp, *n_inp;
+ struct sctp_tcb *stcb;
+
+ SCTPDBG(SCTP_DEBUG_PEEL1, "SCTP peel-off called\n");
+ inp = (struct sctp_inpcb *)head->so_pcb;
+ if (inp == NULL) {
+ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
+ *error = EFAULT;
+ return (NULL);
+ }
+ stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
+ if (stcb == NULL) {
+ SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
+ *error = ENOTCONN;
+ return (NULL);
+ }
+ atomic_add_int(&stcb->asoc.refcnt, 1);
+ SCTP_TCB_UNLOCK(stcb);
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+ CURVNET_SET(head->so_vnet);
+#endif
+ newso = sonewconn(head, SS_ISCONNECTED
+#if defined(__APPLE__) && !defined(__Userspace__)
+ , NULL
+#endif
+ );
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+ CURVNET_RESTORE();
+#endif
+ if (newso == NULL) {
+ SCTPDBG(SCTP_DEBUG_PEEL1, "sctp_peeloff:sonewconn failed\n");
+ SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOMEM);
+ *error = ENOMEM;
+ atomic_subtract_int(&stcb->asoc.refcnt, 1);
+ return (NULL);
+
+ }
+#if defined(__APPLE__) && !defined(__Userspace__)
+ else {
+ SCTP_SOCKET_LOCK(newso, 1);
+ }
+#endif
+ SCTP_TCB_LOCK(stcb);
+ atomic_subtract_int(&stcb->asoc.refcnt, 1);
+ n_inp = (struct sctp_inpcb *)newso->so_pcb;
+ SOCK_LOCK(head);
+ n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
+ SCTP_PCB_FLAGS_CONNECTED |
+ SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
+ (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
+ n_inp->sctp_features = inp->sctp_features;
+ n_inp->sctp_frag_point = inp->sctp_frag_point;
+ n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off;
+ n_inp->ecn_supported = inp->ecn_supported;
+ n_inp->prsctp_supported = inp->prsctp_supported;
+ n_inp->auth_supported = inp->auth_supported;
+ n_inp->asconf_supported = inp->asconf_supported;
+ n_inp->reconfig_supported = inp->reconfig_supported;
+ n_inp->nrsack_supported = inp->nrsack_supported;
+ n_inp->pktdrop_supported = inp->pktdrop_supported;
+ n_inp->partial_delivery_point = inp->partial_delivery_point;
+ n_inp->sctp_context = inp->sctp_context;
+ n_inp->max_cwnd = inp->max_cwnd;
+ n_inp->local_strreset_support = inp->local_strreset_support;
+ n_inp->inp_starting_point_for_iterator = NULL;
+#if defined(__Userspace__)
+ n_inp->ulp_info = inp->ulp_info;
+ n_inp->recv_callback = inp->recv_callback;
+ n_inp->send_callback = inp->send_callback;
+ n_inp->send_sb_threshold = inp->send_sb_threshold;
+#endif
+
+ /* copy in the authentication parameters from the original endpoint */
+ if (n_inp->sctp_ep.local_hmacs)
+ sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
+ n_inp->sctp_ep.local_hmacs =
+ sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
+ if (n_inp->sctp_ep.local_auth_chunks)
+ sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
+ n_inp->sctp_ep.local_auth_chunks =
+ sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
+ (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
+ &n_inp->sctp_ep.shared_keys);
+
+ n_inp->sctp_socket = newso;
+ if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
+ sctp_feature_off(n_inp, SCTP_PCB_FLAGS_AUTOCLOSE);
+ n_inp->sctp_ep.auto_close_time = 0;
+ sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, n_inp, stcb, NULL,
+ SCTP_FROM_SCTP_PEELOFF + SCTP_LOC_1);
+ }
+ /* Turn off any non-blocking semantic. */
+ SOCK_LOCK(newso);
+ SCTP_CLEAR_SO_NBIO(newso);
+ newso->so_state |= SS_ISCONNECTED;
+ SOCK_UNLOCK(newso);
+ /* We remove it right away */
+
+#ifdef SCTP_LOCK_LOGGING
+ if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) {
+ sctp_log_lock(inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_SOCK);
+ }
+#endif
+ TAILQ_REMOVE(&head->so_comp, newso, so_list);
+ head->so_qlen--;
+ SOCK_UNLOCK(head);
+ /*
+ * Now we must move it from one hash table to another and get the
+ * stcb in the right place.
+ */
+ sctp_move_pcb_and_assoc(inp, n_inp, stcb);
+ atomic_add_int(&stcb->asoc.refcnt, 1);
+ SCTP_TCB_UNLOCK(stcb);
+ /*
+ * And now the final hack. We move data in the pending side i.e.
+ * head to the new socket buffer. Let the GRUBBING begin :-0
+ */
+#if defined(__FreeBSD__) && !defined(__Userspace__)
+ sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
+#else
+ sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK);
+#endif
+ atomic_subtract_int(&stcb->asoc.refcnt, 1);
+ return (newso);
+}
+#endif