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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>
49 extern uint32_t sctp_debug_on;
51 #endif /* SCTP_DEBUG */
55 sctp_can_peel_off(struct socket *head, sctp_assoc_t assoc_id)
57 struct sctp_inpcb *inp;
58 struct sctp_tcb *stcb;
60 inp = (struct sctp_inpcb *)head->so_pcb;
64 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
68 SCTP_TCB_UNLOCK(stcb);
69 /* We are clear to peel this one off */
74 sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id)
76 struct sctp_inpcb *inp, *n_inp;
77 struct sctp_tcb *stcb;
79 inp = (struct sctp_inpcb *)head->so_pcb;
82 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
86 n_inp = (struct sctp_inpcb *)so->so_pcb;
87 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
88 SCTP_PCB_FLAGS_CONNECTED |
89 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
90 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
91 n_inp->sctp_socket = so;
92 n_inp->sctp_features = inp->sctp_features;
93 n_inp->sctp_frag_point = inp->sctp_frag_point;
94 n_inp->partial_delivery_point = inp->partial_delivery_point;
95 n_inp->sctp_context = inp->sctp_context;
96 n_inp->inp_starting_point_for_iterator = NULL;
99 * Now we must move it from one hash table to another and get the
100 * stcb in the right place.
102 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
103 atomic_add_int(&stcb->asoc.refcnt, 1);
104 SCTP_TCB_UNLOCK(stcb);
106 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK);
107 atomic_subtract_int(&stcb->asoc.refcnt, 1);
114 sctp_get_peeloff(struct socket *head, sctp_assoc_t assoc_id, int *error)
116 struct socket *newso;
117 struct sctp_inpcb *inp, *n_inp;
118 struct sctp_tcb *stcb;
120 SCTPDBG(SCTP_DEBUG_PEEL1, "SCTP peel-off called\n");
121 inp = (struct sctp_inpcb *)head->so_pcb;
126 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
131 newso = sonewconn(head, SS_ISCONNECTED
134 SCTPDBG(SCTP_DEBUG_PEEL1, "sctp_peeloff:sonewconn failed\n");
136 SCTP_TCB_UNLOCK(stcb);
140 n_inp = (struct sctp_inpcb *)newso->so_pcb;
143 SCTP_INP_WLOCK(n_inp);
144 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
145 SCTP_PCB_FLAGS_CONNECTED |
146 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
147 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
148 n_inp->sctp_features = inp->sctp_features;
149 n_inp->sctp_frag_point = inp->sctp_frag_point;
150 n_inp->partial_delivery_point = inp->partial_delivery_point;
151 n_inp->sctp_context = inp->sctp_context;
152 n_inp->inp_starting_point_for_iterator = NULL;
154 /* copy in the authentication parameters from the original endpoint */
155 if (n_inp->sctp_ep.local_hmacs)
156 sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
157 n_inp->sctp_ep.local_hmacs =
158 sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
159 if (n_inp->sctp_ep.local_auth_chunks)
160 sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
161 n_inp->sctp_ep.local_auth_chunks =
162 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
163 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
164 &n_inp->sctp_ep.shared_keys);
166 n_inp->sctp_socket = newso;
167 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
168 sctp_feature_off(n_inp, SCTP_PCB_FLAGS_AUTOCLOSE);
169 n_inp->sctp_ep.auto_close_time = 0;
170 sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, n_inp, stcb, NULL,
171 SCTP_FROM_SCTP_PEELOFF + SCTP_LOC_1);
173 /* Turn off any non-blocking semantic. */
174 SCTP_CLEAR_SO_NBIO(newso);
175 newso->so_state |= SS_ISCONNECTED;
176 /* We remove it right away */
178 #ifdef SCTP_LOCK_LOGGING
179 if (sctp_logging_level & SCTP_LOCK_LOGGING_ENABLE) {
180 sctp_log_lock(inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_SOCK);
183 TAILQ_REMOVE(&head->so_comp, newso, so_list);
187 * Now we must move it from one hash table to another and get the
188 * stcb in the right place.
190 SCTP_INP_WUNLOCK(n_inp);
191 SCTP_INP_WUNLOCK(inp);
192 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
193 atomic_add_int(&stcb->asoc.refcnt, 1);
194 SCTP_TCB_UNLOCK(stcb);
196 * And now the final hack. We move data in the pending side i.e.
197 * head to the new socket buffer. Let the GRUBBING begin :-0
199 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK);
200 atomic_subtract_int(&stcb->asoc.refcnt, 1);