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243 lines
8.5 KiB
C
243 lines
8.5 KiB
C
/*-
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* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
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* Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* a) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* b) Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* c) Neither the name of Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* $KAME: sctp_peeloff.c,v 1.13 2005/03/06 16:04:18 itojun Exp $ */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <netinet/sctp_os.h>
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#include <netinet/sctp_pcb.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_var.h>
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#include <netinet/sctp_var.h>
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#include <netinet/sctp_sysctl.h>
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#include <netinet/sctp.h>
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#include <netinet/sctp_uio.h>
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#include <netinet/sctp_peeloff.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_auth.h>
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int
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sctp_can_peel_off(struct socket *head, sctp_assoc_t assoc_id)
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{
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struct sctp_inpcb *inp;
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struct sctp_tcb *stcb;
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uint32_t state;
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inp = (struct sctp_inpcb *)head->so_pcb;
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if (inp == NULL) {
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SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
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return (EFAULT);
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}
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stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
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if (stcb == NULL) {
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SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOENT);
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return (ENOENT);
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}
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state = SCTP_GET_STATE((&stcb->asoc));
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if ((state == SCTP_STATE_EMPTY) ||
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(state == SCTP_STATE_INUSE) ||
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(state == SCTP_STATE_COOKIE_WAIT) ||
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(state == SCTP_STATE_COOKIE_ECHOED)) {
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SCTP_TCB_UNLOCK(stcb);
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SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
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return (ENOTCONN);
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}
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SCTP_TCB_UNLOCK(stcb);
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/* We are clear to peel this one off */
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return (0);
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}
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int
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sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id)
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{
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struct sctp_inpcb *inp, *n_inp;
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struct sctp_tcb *stcb;
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uint32_t state;
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inp = (struct sctp_inpcb *)head->so_pcb;
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if (inp == NULL) {
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SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
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return (EFAULT);
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}
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stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
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if (stcb == NULL) {
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SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
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return (ENOTCONN);
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}
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state = SCTP_GET_STATE((&stcb->asoc));
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if ((state == SCTP_STATE_EMPTY) ||
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(state == SCTP_STATE_INUSE) ||
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(state == SCTP_STATE_COOKIE_WAIT) ||
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(state == SCTP_STATE_COOKIE_ECHOED)) {
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SCTP_TCB_UNLOCK(stcb);
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SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
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return (ENOTCONN);
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}
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n_inp = (struct sctp_inpcb *)so->so_pcb;
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n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
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SCTP_PCB_FLAGS_CONNECTED |
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SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
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(SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
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n_inp->sctp_socket = so;
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n_inp->sctp_features = inp->sctp_features;
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n_inp->sctp_mobility_features = inp->sctp_mobility_features;
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n_inp->sctp_frag_point = inp->sctp_frag_point;
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n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off;
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n_inp->sctp_ecn_enable = inp->sctp_ecn_enable;
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n_inp->partial_delivery_point = inp->partial_delivery_point;
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n_inp->sctp_context = inp->sctp_context;
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n_inp->inp_starting_point_for_iterator = NULL;
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/* copy in the authentication parameters from the original endpoint */
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if (n_inp->sctp_ep.local_hmacs)
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sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
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n_inp->sctp_ep.local_hmacs =
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sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
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if (n_inp->sctp_ep.local_auth_chunks)
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sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
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n_inp->sctp_ep.local_auth_chunks =
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sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
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(void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
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&n_inp->sctp_ep.shared_keys);
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/*
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* Now we must move it from one hash table to another and get the
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* stcb in the right place.
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*/
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sctp_move_pcb_and_assoc(inp, n_inp, stcb);
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atomic_add_int(&stcb->asoc.refcnt, 1);
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SCTP_TCB_UNLOCK(stcb);
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sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
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atomic_subtract_int(&stcb->asoc.refcnt, 1);
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return (0);
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}
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struct socket *
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sctp_get_peeloff(struct socket *head, sctp_assoc_t assoc_id, int *error)
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{
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struct socket *newso;
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struct sctp_inpcb *inp, *n_inp;
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struct sctp_tcb *stcb;
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SCTPDBG(SCTP_DEBUG_PEEL1, "SCTP peel-off called\n");
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inp = (struct sctp_inpcb *)head->so_pcb;
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if (inp == NULL) {
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SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
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*error = EFAULT;
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return (NULL);
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}
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stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
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if (stcb == NULL) {
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SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
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*error = ENOTCONN;
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return (NULL);
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}
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atomic_add_int(&stcb->asoc.refcnt, 1);
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SCTP_TCB_UNLOCK(stcb);
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newso = sonewconn(head, SS_ISCONNECTED
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);
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if (newso == NULL) {
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SCTPDBG(SCTP_DEBUG_PEEL1, "sctp_peeloff:sonewconn failed\n");
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SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOMEM);
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*error = ENOMEM;
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atomic_subtract_int(&stcb->asoc.refcnt, 1);
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return (NULL);
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}
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SCTP_TCB_LOCK(stcb);
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atomic_subtract_int(&stcb->asoc.refcnt, 1);
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n_inp = (struct sctp_inpcb *)newso->so_pcb;
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SOCK_LOCK(head);
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n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
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SCTP_PCB_FLAGS_CONNECTED |
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SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
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(SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
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n_inp->sctp_features = inp->sctp_features;
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n_inp->sctp_frag_point = inp->sctp_frag_point;
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n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off;
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n_inp->sctp_ecn_enable = inp->sctp_ecn_enable;
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n_inp->partial_delivery_point = inp->partial_delivery_point;
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n_inp->sctp_context = inp->sctp_context;
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n_inp->inp_starting_point_for_iterator = NULL;
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/* copy in the authentication parameters from the original endpoint */
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if (n_inp->sctp_ep.local_hmacs)
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sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
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n_inp->sctp_ep.local_hmacs =
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sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
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if (n_inp->sctp_ep.local_auth_chunks)
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sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
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n_inp->sctp_ep.local_auth_chunks =
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sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
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(void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
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&n_inp->sctp_ep.shared_keys);
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n_inp->sctp_socket = newso;
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if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
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sctp_feature_off(n_inp, SCTP_PCB_FLAGS_AUTOCLOSE);
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n_inp->sctp_ep.auto_close_time = 0;
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sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, n_inp, stcb, NULL,
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SCTP_FROM_SCTP_PEELOFF + SCTP_LOC_1);
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}
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/* Turn off any non-blocking semantic. */
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SCTP_CLEAR_SO_NBIO(newso);
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newso->so_state |= SS_ISCONNECTED;
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/* We remove it right away */
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#ifdef SCTP_LOCK_LOGGING
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if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) {
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sctp_log_lock(inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_SOCK);
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}
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#endif
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TAILQ_REMOVE(&head->so_comp, newso, so_list);
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head->so_qlen--;
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SOCK_UNLOCK(head);
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/*
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* Now we must move it from one hash table to another and get the
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* stcb in the right place.
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*/
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sctp_move_pcb_and_assoc(inp, n_inp, stcb);
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atomic_add_int(&stcb->asoc.refcnt, 1);
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SCTP_TCB_UNLOCK(stcb);
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/*
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* And now the final hack. We move data in the pending side i.e.
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* head to the new socket buffer. Let the GRUBBING begin :-0
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*/
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sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
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atomic_subtract_int(&stcb->asoc.refcnt, 1);
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return (newso);
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}
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