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- /*-
- * 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.
- */
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- #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;
- n_inp->inp_starting_point_for_iterator = NULL;
- /* 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);
- /*
- * 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);
- sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
- atomic_subtract_int(&stcb->asoc.refcnt, 1);
- return (0);
- }
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