2 * Copyright (c) 2001-2006, Cisco Systems, Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
32 /* $KAME: sctp_peeloff.c,v 1.13 2005/03/06 16:04:18 itojun Exp $ */
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include "opt_ipsec.h"
38 #include "opt_inet6.h"
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/malloc.h>
48 #include <sys/domain.h>
50 #include <sys/protosw.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/sysctl.h>
54 #include <sys/syslog.h>
56 #include <net/route.h>
57 #include <netinet/in.h>
58 #include <netinet/in_systm.h>
59 #include <netinet/ip.h>
61 #include <netinet/ip6.h>
63 #include <netinet/in_pcb.h>
64 #include <netinet/in_var.h>
65 #include <netinet/ip_var.h>
67 #include <netinet6/ip6_var.h>
69 #include <netinet/ip_icmp.h>
70 #include <netinet/icmp_var.h>
71 #include <netinet/sctp_os.h>
72 #include <netinet/sctp_pcb.h>
73 #include <netinet/sctp.h>
74 #include <netinet/sctp_uio.h>
75 #include <netinet/sctp_var.h>
76 #include <netinet/sctp_peeloff.h>
77 #include <netinet/sctputil.h>
78 #include <netinet/sctp_auth.h>
81 #include <netinet6/ipsec.h>
82 #include <netkey/key.h>
87 extern uint32_t sctp_debug_on;
89 #endif /* SCTP_DEBUG */
93 sctp_can_peel_off(struct socket *head, sctp_assoc_t assoc_id)
95 struct sctp_inpcb *inp;
96 struct sctp_tcb *stcb;
98 inp = (struct sctp_inpcb *)head->so_pcb;
102 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
106 SCTP_TCB_UNLOCK(stcb);
107 /* We are clear to peel this one off */
112 sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id)
114 struct sctp_inpcb *inp, *n_inp;
115 struct sctp_tcb *stcb;
117 inp = (struct sctp_inpcb *)head->so_pcb;
120 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
124 n_inp = (struct sctp_inpcb *)so->so_pcb;
125 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
126 SCTP_PCB_FLAGS_CONNECTED |
127 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
128 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
129 n_inp->sctp_socket = so;
130 n_inp->sctp_features = inp->sctp_features;
131 n_inp->sctp_frag_point = inp->sctp_frag_point;
132 n_inp->partial_delivery_point = inp->partial_delivery_point;
133 n_inp->sctp_context = inp->sctp_context;
134 n_inp->inp_starting_point_for_iterator = NULL;
137 * Now we must move it from one hash table to another and get the
138 * stcb in the right place.
140 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
142 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb);
144 SCTP_TCB_UNLOCK(stcb);
149 sctp_get_peeloff(struct socket *head, sctp_assoc_t assoc_id, int *error)
151 struct socket *newso;
152 struct sctp_inpcb *inp, *n_inp;
153 struct sctp_tcb *stcb;
156 if (sctp_debug_on & SCTP_DEBUG_PEEL1) {
157 printf("SCTP peel-off called\n");
159 #endif /* SCTP_DEBUG */
161 inp = (struct sctp_inpcb *)head->so_pcb;
166 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
171 newso = sonewconn(head, SS_ISCONNECTED
175 if (sctp_debug_on & SCTP_DEBUG_PEEL1) {
176 printf("sctp_peeloff:sonewconn failed err\n");
178 #endif /* SCTP_DEBUG */
180 SCTP_TCB_UNLOCK(stcb);
183 n_inp = (struct sctp_inpcb *)newso->so_pcb;
186 SCTP_INP_WLOCK(n_inp);
187 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
188 SCTP_PCB_FLAGS_CONNECTED |
189 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
190 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
191 n_inp->sctp_features = inp->sctp_features;
192 n_inp->sctp_frag_point = inp->sctp_frag_point;
193 n_inp->partial_delivery_point = inp->partial_delivery_point;
194 n_inp->sctp_context = inp->sctp_context;
195 n_inp->inp_starting_point_for_iterator = NULL;
197 /* copy in the authentication parameters from the original endpoint */
198 if (n_inp->sctp_ep.local_hmacs)
199 sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
200 n_inp->sctp_ep.local_hmacs =
201 sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
202 if (n_inp->sctp_ep.local_auth_chunks)
203 sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
204 n_inp->sctp_ep.local_auth_chunks =
205 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
206 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
207 &n_inp->sctp_ep.shared_keys);
209 n_inp->sctp_socket = newso;
210 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
211 sctp_feature_off(n_inp, SCTP_PCB_FLAGS_AUTOCLOSE);
212 n_inp->sctp_ep.auto_close_time = 0;
213 sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, n_inp, stcb, NULL,
214 SCTP_FROM_SCTP_PEELOFF + SCTP_LOC_1);
216 /* Turn off any non-blocking semantic. */
217 newso->so_state &= ~SS_NBIO;
218 newso->so_state |= SS_ISCONNECTED;
219 /* We remove it right away */
220 #ifdef SCTP_LOCK_LOGGING
221 sctp_log_lock(inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_SOCK);
223 TAILQ_REMOVE(&head->so_comp, newso, so_list);
227 * Now we must move it from one hash table to another and get the
228 * stcb in the right place.
230 SCTP_INP_WUNLOCK(n_inp);
231 SCTP_INP_WUNLOCK(inp);
232 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
234 * And now the final hack. We move data in the pending side i.e.
235 * head to the new socket buffer. Let the GRUBBING begin :-0
237 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb);
239 SCTP_TCB_UNLOCK(stcb);