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32 /* $KAME: sctp_peeloff.c,v 1.13 2005/03/06 16:04:18 itojun Exp $ */
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
36 #include <netinet/sctp_os.h>
37 #include <netinet/sctp_pcb.h>
38 #include <netinet/sctputil.h>
39 #include <netinet/sctp_var.h>
40 #include <netinet/sctp_var.h>
41 #include <netinet/sctp_sysctl.h>
42 #include <netinet/sctp.h>
43 #include <netinet/sctp_uio.h>
44 #include <netinet/sctp_peeloff.h>
45 #include <netinet/sctputil.h>
46 #include <netinet/sctp_auth.h>
50 sctp_can_peel_off(struct socket *head, sctp_assoc_t assoc_id)
52 struct sctp_inpcb *inp;
53 struct sctp_tcb *stcb;
56 inp = (struct sctp_inpcb *)head->so_pcb;
60 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
64 state = SCTP_GET_STATE((&stcb->asoc));
65 if ((state == SCTP_STATE_EMPTY) ||
66 (state == SCTP_STATE_INUSE) ||
67 (state == SCTP_STATE_COOKIE_WAIT) ||
68 (state == SCTP_STATE_COOKIE_ECHOED)) {
69 SCTP_TCB_UNLOCK(stcb);
72 SCTP_TCB_UNLOCK(stcb);
73 /* We are clear to peel this one off */
78 sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id)
80 struct sctp_inpcb *inp, *n_inp;
81 struct sctp_tcb *stcb;
84 inp = (struct sctp_inpcb *)head->so_pcb;
87 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
91 state = SCTP_GET_STATE((&stcb->asoc));
92 if ((state == SCTP_STATE_EMPTY) ||
93 (state == SCTP_STATE_INUSE) ||
94 (state == SCTP_STATE_COOKIE_WAIT) ||
95 (state == SCTP_STATE_COOKIE_ECHOED)) {
96 SCTP_TCB_UNLOCK(stcb);
99 n_inp = (struct sctp_inpcb *)so->so_pcb;
100 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
101 SCTP_PCB_FLAGS_CONNECTED |
102 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
103 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
104 n_inp->sctp_socket = so;
105 n_inp->sctp_features = inp->sctp_features;
106 n_inp->sctp_frag_point = inp->sctp_frag_point;
107 n_inp->partial_delivery_point = inp->partial_delivery_point;
108 n_inp->sctp_context = inp->sctp_context;
109 n_inp->inp_starting_point_for_iterator = NULL;
112 * Now we must move it from one hash table to another and get the
113 * stcb in the right place.
115 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
116 atomic_add_int(&stcb->asoc.refcnt, 1);
117 SCTP_TCB_UNLOCK(stcb);
119 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK);
120 atomic_subtract_int(&stcb->asoc.refcnt, 1);
127 sctp_get_peeloff(struct socket *head, sctp_assoc_t assoc_id, int *error)
129 struct socket *newso;
130 struct sctp_inpcb *inp, *n_inp;
131 struct sctp_tcb *stcb;
133 SCTPDBG(SCTP_DEBUG_PEEL1, "SCTP peel-off called\n");
134 inp = (struct sctp_inpcb *)head->so_pcb;
139 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
144 newso = sonewconn(head, SS_ISCONNECTED
147 SCTPDBG(SCTP_DEBUG_PEEL1, "sctp_peeloff:sonewconn failed\n");
149 SCTP_TCB_UNLOCK(stcb);
153 n_inp = (struct sctp_inpcb *)newso->so_pcb;
156 SCTP_INP_WLOCK(n_inp);
157 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
158 SCTP_PCB_FLAGS_CONNECTED |
159 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
160 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
161 n_inp->sctp_features = inp->sctp_features;
162 n_inp->sctp_frag_point = inp->sctp_frag_point;
163 n_inp->partial_delivery_point = inp->partial_delivery_point;
164 n_inp->sctp_context = inp->sctp_context;
165 n_inp->inp_starting_point_for_iterator = NULL;
167 /* copy in the authentication parameters from the original endpoint */
168 if (n_inp->sctp_ep.local_hmacs)
169 sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
170 n_inp->sctp_ep.local_hmacs =
171 sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
172 if (n_inp->sctp_ep.local_auth_chunks)
173 sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
174 n_inp->sctp_ep.local_auth_chunks =
175 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
176 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
177 &n_inp->sctp_ep.shared_keys);
179 n_inp->sctp_socket = newso;
180 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
181 sctp_feature_off(n_inp, SCTP_PCB_FLAGS_AUTOCLOSE);
182 n_inp->sctp_ep.auto_close_time = 0;
183 sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, n_inp, stcb, NULL,
184 SCTP_FROM_SCTP_PEELOFF + SCTP_LOC_1);
186 /* Turn off any non-blocking semantic. */
187 SCTP_CLEAR_SO_NBIO(newso);
188 newso->so_state |= SS_ISCONNECTED;
189 /* We remove it right away */
191 #ifdef SCTP_LOCK_LOGGING
192 if (sctp_logging_level & SCTP_LOCK_LOGGING_ENABLE) {
193 sctp_log_lock(inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_SOCK);
196 TAILQ_REMOVE(&head->so_comp, newso, so_list);
200 * Now we must move it from one hash table to another and get the
201 * stcb in the right place.
203 SCTP_INP_WUNLOCK(n_inp);
204 SCTP_INP_WUNLOCK(inp);
205 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
206 atomic_add_int(&stcb->asoc.refcnt, 1);
207 SCTP_TCB_UNLOCK(stcb);
209 * And now the final hack. We move data in the pending side i.e.
210 * head to the new socket buffer. Let the GRUBBING begin :-0
212 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK);
213 atomic_subtract_int(&stcb->asoc.refcnt, 1);