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freebsd-dev/sys/netinet/sctp_peeloff.c
Randall Stewart f8829a4a40 Ok, here it is, we finally add SCTP to current. Note that this 
work is not just mine, but it is also the works of Peter Lei
and Michael Tuexen. They both are my two key other developers
working on the project.. and they need ata-boy's too:
****
peterlei@cisco.com
tuexen@fh-muenster.de
****
I did do a make sysent which updated the
syscall's and sysproto.. I hope that is correct... without
it you don't build since we have new syscalls for SCTP :-0

So go out and look at the NOTES, add
option SCTP (make sure inet and inet6 are present too)
and play with SCTP.

I will see about comitting some test tools I have after I
figure out where I should place them. I also have a
lib (libsctp.a) that adds some of the missing socketapi
functions that I need to put into lib's.. I will talk
to George about this :-)

There may still be some 64 bit issues in here, none of
us have a 64 bit processor to test with yet.. Michael
may have a MAC but thats another beast too..

If you have a mac and want to use SCTP contact Michael
he maintains a web site with a loadable module with
this code :-)

Reviewed by:	gnn
Approved by:	gnn
2006-11-03 15:23:16 +00:00

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/*-
* Copyright (c) 2001-2006, Cisco Systems, Inc. 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 "opt_ipsec.h"
#include "opt_inet6.h"
#include "opt_inet.h"
#include "opt_sctp.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#ifdef INET6
#include <netinet/ip6.h>
#endif
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#ifdef INET6
#include <netinet6/ip6_var.h>
#endif
#include <netinet/ip_icmp.h>
#include <netinet/icmp_var.h>
#include <netinet/sctp_os.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctp.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctp_var.h>
#include <netinet/sctp_peeloff.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_auth.h>
#ifdef IPSEC
#include <netinet6/ipsec.h>
#include <netkey/key.h>
#endif /* IPSEC */
#ifdef SCTP_DEBUG
extern uint32_t sctp_debug_on;
#endif /* SCTP_DEBUG */
int
sctp_can_peel_off(struct socket *head, sctp_assoc_t assoc_id)
{
struct sctp_inpcb *inp;
struct sctp_tcb *stcb;
inp = (struct sctp_inpcb *)head->so_pcb;
if (inp == NULL) {
return (EFAULT);
}
stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
if (stcb == NULL) {
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;
inp = (struct sctp_inpcb *)head->so_pcb;
if (inp == NULL)
return (EFAULT);
stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
if (stcb == NULL)
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_frag_point = inp->sctp_frag_point;
n_inp->partial_delivery_point = inp->partial_delivery_point;
n_inp->sctp_context = inp->sctp_context;
n_inp->inp_starting_point_for_iterator = NULL;
/*
* 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);
sctp_pull_off_control_to_new_inp(inp, n_inp, stcb);
SCTP_TCB_UNLOCK(stcb);
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;
#ifdef SCTP_DEBUG
if (sctp_debug_on & SCTP_DEBUG_PEEL1) {
printf("SCTP peel-off called\n");
}
#endif /* SCTP_DEBUG */
inp = (struct sctp_inpcb *)head->so_pcb;
if (inp == NULL) {
*error = EFAULT;
return (NULL);
}
stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
if (stcb == NULL) {
*error = ENOTCONN;
return (NULL);
}
newso = sonewconn(head, SS_ISCONNECTED
);
if (newso == NULL) {
#ifdef SCTP_DEBUG
if (sctp_debug_on & SCTP_DEBUG_PEEL1) {
printf("sctp_peeloff:sonewconn failed err\n");
}
#endif /* SCTP_DEBUG */
*error = ENOMEM;
SCTP_TCB_UNLOCK(stcb);
return (NULL);
}
n_inp = (struct sctp_inpcb *)newso->so_pcb;
SOCK_LOCK(head);
SCTP_INP_WLOCK(inp);
SCTP_INP_WLOCK(n_inp);
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->partial_delivery_point = inp->partial_delivery_point;
n_inp->sctp_context = inp->sctp_context;
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);
}
/* Turn off any non-blocking semantic. */
newso->so_state &= ~SS_NBIO;
newso->so_state |= SS_ISCONNECTED;
/* We remove it right away */
#ifdef SCTP_LOCK_LOGGING
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_INP_WUNLOCK(n_inp);
SCTP_INP_WUNLOCK(inp);
sctp_move_pcb_and_assoc(inp, n_inp, 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);
SCTP_TCB_UNLOCK(stcb);
return (newso);
}
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