ddfb5c5980
compliant to RFC6525. MFC after: 1 month
256 lines
8.9 KiB
C
256 lines
8.9 KiB
C
/*-
|
|
* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
|
|
* Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
|
|
* Copyright (c) 2008-2011, 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.
|
|
*/
|
|
|
|
|
|
/* $KAME: sctp_peeloff.c,v 1.13 2005/03/06 16:04:18 itojun Exp $ */
|
|
|
|
#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) ||
|
|
(state == SCTP_STATE_COOKIE_WAIT) ||
|
|
(state == SCTP_STATE_COOKIE_ECHOED)) {
|
|
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) ||
|
|
(state == SCTP_STATE_COOKIE_WAIT) ||
|
|
(state == SCTP_STATE_COOKIE_ECHOED)) {
|
|
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);
|
|
}
|
|
|
|
|
|
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);
|
|
CURVNET_SET(head->so_vnet);
|
|
newso = sonewconn(head, SS_ISCONNECTED
|
|
);
|
|
CURVNET_RESTORE();
|
|
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);
|
|
|
|
}
|
|
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->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);
|
|
|
|
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. */
|
|
SCTP_CLEAR_SO_NBIO(newso);
|
|
newso->so_state |= SS_ISCONNECTED;
|
|
/* 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
|
|
*/
|
|
sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
return (newso);
|
|
}
|