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Diffstat (limited to '')
| -rw-r--r-- | netwerk/sctp/src/netinet/sctp_peeloff.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/netwerk/sctp/src/netinet/sctp_peeloff.c b/netwerk/sctp/src/netinet/sctp_peeloff.c new file mode 100644 index 0000000000..548c3d82b2 --- /dev/null +++ b/netwerk/sctp/src/netinet/sctp_peeloff.c @@ -0,0 +1,302 @@ +/*- + * 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. + */ + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); +#endif + +#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; + /* 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); +#if defined(__Userspace__) + n_inp->ulp_info = inp->ulp_info; + n_inp->recv_callback = inp->recv_callback; + n_inp->send_callback = inp->send_callback; + n_inp->send_sb_threshold = inp->send_sb_threshold; +#endif + /* + * 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); + +#if defined(__FreeBSD__) && !defined(__Userspace__) + sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT); +#else + sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK); +#endif + atomic_subtract_int(&stcb->asoc.refcnt, 1); + + return (0); +} + +#if defined(HAVE_SCTP_PEELOFF_SOCKOPT) +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); +#if defined(__FreeBSD__) && !defined(__Userspace__) + CURVNET_SET(head->so_vnet); +#endif + newso = sonewconn(head, SS_ISCONNECTED +#if defined(__APPLE__) && !defined(__Userspace__) + , NULL +#endif + ); +#if defined(__FreeBSD__) && !defined(__Userspace__) + CURVNET_RESTORE(); +#endif + 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); + + } +#if defined(__APPLE__) && !defined(__Userspace__) + else { + SCTP_SOCKET_LOCK(newso, 1); + } +#endif + 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->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; +#if defined(__Userspace__) + n_inp->ulp_info = inp->ulp_info; + n_inp->recv_callback = inp->recv_callback; + n_inp->send_callback = inp->send_callback; + n_inp->send_sb_threshold = inp->send_sb_threshold; +#endif + + /* 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. */ + SOCK_LOCK(newso); + SCTP_CLEAR_SO_NBIO(newso); + newso->so_state |= SS_ISCONNECTED; + SOCK_UNLOCK(newso); + /* 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 + */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT); +#else + sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK); +#endif + atomic_subtract_int(&stcb->asoc.refcnt, 1); + return (newso); +} +#endif |