2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
34 /* $KAME: sctp_peeloff.c,v 1.13 2005/03/06 16:04:18 itojun Exp $ */
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38 #include <netinet/sctp_os.h>
39 #include <netinet/sctp_pcb.h>
40 #include <netinet/sctputil.h>
41 #include <netinet/sctp_var.h>
42 #include <netinet/sctp_var.h>
43 #include <netinet/sctp_sysctl.h>
44 #include <netinet/sctp.h>
45 #include <netinet/sctp_uio.h>
46 #include <netinet/sctp_peeloff.h>
47 #include <netinet/sctputil.h>
48 #include <netinet/sctp_auth.h>
52 sctp_can_peel_off(struct socket *head, sctp_assoc_t assoc_id)
54 struct sctp_inpcb *inp;
55 struct sctp_tcb *stcb;
59 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EBADF);
62 inp = (struct sctp_inpcb *)head->so_pcb;
64 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
67 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
68 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
69 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EOPNOTSUPP);
72 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
74 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOENT);
77 state = SCTP_GET_STATE((&stcb->asoc));
78 if ((state == SCTP_STATE_EMPTY) ||
79 (state == SCTP_STATE_INUSE) ||
80 (state == SCTP_STATE_COOKIE_WAIT) ||
81 (state == SCTP_STATE_COOKIE_ECHOED)) {
82 SCTP_TCB_UNLOCK(stcb);
83 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
86 SCTP_TCB_UNLOCK(stcb);
87 /* We are clear to peel this one off */
92 sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id)
94 struct sctp_inpcb *inp, *n_inp;
95 struct sctp_tcb *stcb;
98 inp = (struct sctp_inpcb *)head->so_pcb;
100 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
103 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
105 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
108 state = SCTP_GET_STATE((&stcb->asoc));
109 if ((state == SCTP_STATE_EMPTY) ||
110 (state == SCTP_STATE_INUSE) ||
111 (state == SCTP_STATE_COOKIE_WAIT) ||
112 (state == SCTP_STATE_COOKIE_ECHOED)) {
113 SCTP_TCB_UNLOCK(stcb);
114 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
117 n_inp = (struct sctp_inpcb *)so->so_pcb;
118 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
119 SCTP_PCB_FLAGS_CONNECTED |
120 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
121 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
122 n_inp->sctp_socket = so;
123 n_inp->sctp_features = inp->sctp_features;
124 n_inp->sctp_mobility_features = inp->sctp_mobility_features;
125 n_inp->sctp_frag_point = inp->sctp_frag_point;
126 n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off;
127 n_inp->sctp_ecn_enable = inp->sctp_ecn_enable;
128 n_inp->partial_delivery_point = inp->partial_delivery_point;
129 n_inp->sctp_context = inp->sctp_context;
130 n_inp->local_strreset_support = inp->local_strreset_support;
131 n_inp->inp_starting_point_for_iterator = NULL;
132 /* copy in the authentication parameters from the original endpoint */
133 if (n_inp->sctp_ep.local_hmacs)
134 sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
135 n_inp->sctp_ep.local_hmacs =
136 sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
137 if (n_inp->sctp_ep.local_auth_chunks)
138 sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
139 n_inp->sctp_ep.local_auth_chunks =
140 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
141 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
142 &n_inp->sctp_ep.shared_keys);
144 * Now we must move it from one hash table to another and get the
145 * stcb in the right place.
147 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
148 atomic_add_int(&stcb->asoc.refcnt, 1);
149 SCTP_TCB_UNLOCK(stcb);
151 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
152 atomic_subtract_int(&stcb->asoc.refcnt, 1);
159 sctp_get_peeloff(struct socket *head, sctp_assoc_t assoc_id, int *error)
161 struct socket *newso;
162 struct sctp_inpcb *inp, *n_inp;
163 struct sctp_tcb *stcb;
165 SCTPDBG(SCTP_DEBUG_PEEL1, "SCTP peel-off called\n");
166 inp = (struct sctp_inpcb *)head->so_pcb;
168 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
172 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
174 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
178 atomic_add_int(&stcb->asoc.refcnt, 1);
179 SCTP_TCB_UNLOCK(stcb);
180 CURVNET_SET(head->so_vnet);
181 newso = sonewconn(head, SS_ISCONNECTED
185 SCTPDBG(SCTP_DEBUG_PEEL1, "sctp_peeloff:sonewconn failed\n");
186 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOMEM);
188 atomic_subtract_int(&stcb->asoc.refcnt, 1);
193 atomic_subtract_int(&stcb->asoc.refcnt, 1);
194 n_inp = (struct sctp_inpcb *)newso->so_pcb;
196 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
197 SCTP_PCB_FLAGS_CONNECTED |
198 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
199 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
200 n_inp->sctp_features = inp->sctp_features;
201 n_inp->sctp_frag_point = inp->sctp_frag_point;
202 n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off;
203 n_inp->sctp_ecn_enable = inp->sctp_ecn_enable;
204 n_inp->partial_delivery_point = inp->partial_delivery_point;
205 n_inp->sctp_context = inp->sctp_context;
206 n_inp->local_strreset_support = inp->local_strreset_support;
207 n_inp->inp_starting_point_for_iterator = NULL;
209 /* copy in the authentication parameters from the original endpoint */
210 if (n_inp->sctp_ep.local_hmacs)
211 sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
212 n_inp->sctp_ep.local_hmacs =
213 sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
214 if (n_inp->sctp_ep.local_auth_chunks)
215 sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
216 n_inp->sctp_ep.local_auth_chunks =
217 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
218 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
219 &n_inp->sctp_ep.shared_keys);
221 n_inp->sctp_socket = newso;
222 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
223 sctp_feature_off(n_inp, SCTP_PCB_FLAGS_AUTOCLOSE);
224 n_inp->sctp_ep.auto_close_time = 0;
225 sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, n_inp, stcb, NULL,
226 SCTP_FROM_SCTP_PEELOFF + SCTP_LOC_1);
228 /* Turn off any non-blocking semantic. */
229 SCTP_CLEAR_SO_NBIO(newso);
230 newso->so_state |= SS_ISCONNECTED;
231 /* We remove it right away */
233 #ifdef SCTP_LOCK_LOGGING
234 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) {
235 sctp_log_lock(inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_SOCK);
238 TAILQ_REMOVE(&head->so_comp, newso, so_list);
242 * Now we must move it from one hash table to another and get the
243 * stcb in the right place.
245 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
246 atomic_add_int(&stcb->asoc.refcnt, 1);
247 SCTP_TCB_UNLOCK(stcb);
249 * And now the final hack. We move data in the pending side i.e.
250 * head to the new socket buffer. Let the GRUBBING begin :-0
252 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
253 atomic_subtract_int(&stcb->asoc.refcnt, 1);