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/*-
* 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->asoc));
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->asoc));
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->sctp_ecn_enable = inp->sctp_ecn_enable;
n_inp->partial_delivery_point = inp->partial_delivery_point;
n_inp->sctp_context = inp->sctp_context;
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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