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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/netinet/sctp_peeloff.c |
/*- * 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: release/9.1.0/sys/netinet/sctp_peeloff.c 237896 2012-07-01 07:59:00Z tuexen $"); #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); }