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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;
58 inp = (struct sctp_inpcb *)head->so_pcb;
60 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
63 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
65 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOENT);
68 state = SCTP_GET_STATE((&stcb->asoc));
69 if ((state == SCTP_STATE_EMPTY) ||
70 (state == SCTP_STATE_INUSE) ||
71 (state == SCTP_STATE_COOKIE_WAIT) ||
72 (state == SCTP_STATE_COOKIE_ECHOED)) {
73 SCTP_TCB_UNLOCK(stcb);
74 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
77 SCTP_TCB_UNLOCK(stcb);
78 /* We are clear to peel this one off */
83 sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id)
85 struct sctp_inpcb *inp, *n_inp;
86 struct sctp_tcb *stcb;
89 inp = (struct sctp_inpcb *)head->so_pcb;
91 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
94 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
96 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
99 state = SCTP_GET_STATE((&stcb->asoc));
100 if ((state == SCTP_STATE_EMPTY) ||
101 (state == SCTP_STATE_INUSE) ||
102 (state == SCTP_STATE_COOKIE_WAIT) ||
103 (state == SCTP_STATE_COOKIE_ECHOED)) {
104 SCTP_TCB_UNLOCK(stcb);
105 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
108 n_inp = (struct sctp_inpcb *)so->so_pcb;
109 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
110 SCTP_PCB_FLAGS_CONNECTED |
111 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
112 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
113 n_inp->sctp_socket = so;
114 n_inp->sctp_features = inp->sctp_features;
115 n_inp->sctp_mobility_features = inp->sctp_mobility_features;
116 n_inp->sctp_frag_point = inp->sctp_frag_point;
117 n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off;
118 n_inp->sctp_ecn_enable = inp->sctp_ecn_enable;
119 n_inp->partial_delivery_point = inp->partial_delivery_point;
120 n_inp->sctp_context = inp->sctp_context;
121 n_inp->inp_starting_point_for_iterator = NULL;
122 /* copy in the authentication parameters from the original endpoint */
123 if (n_inp->sctp_ep.local_hmacs)
124 sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
125 n_inp->sctp_ep.local_hmacs =
126 sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
127 if (n_inp->sctp_ep.local_auth_chunks)
128 sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
129 n_inp->sctp_ep.local_auth_chunks =
130 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
131 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
132 &n_inp->sctp_ep.shared_keys);
134 * Now we must move it from one hash table to another and get the
135 * stcb in the right place.
137 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
138 atomic_add_int(&stcb->asoc.refcnt, 1);
139 SCTP_TCB_UNLOCK(stcb);
141 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
142 atomic_subtract_int(&stcb->asoc.refcnt, 1);
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;
155 SCTPDBG(SCTP_DEBUG_PEEL1, "SCTP peel-off called\n");
156 inp = (struct sctp_inpcb *)head->so_pcb;
158 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
162 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
164 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
168 atomic_add_int(&stcb->asoc.refcnt, 1);
169 SCTP_TCB_UNLOCK(stcb);
170 CURVNET_SET(head->so_vnet);
171 newso = sonewconn(head, SS_ISCONNECTED
175 SCTPDBG(SCTP_DEBUG_PEEL1, "sctp_peeloff:sonewconn failed\n");
176 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOMEM);
178 atomic_subtract_int(&stcb->asoc.refcnt, 1);
183 atomic_subtract_int(&stcb->asoc.refcnt, 1);
184 n_inp = (struct sctp_inpcb *)newso->so_pcb;
186 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
187 SCTP_PCB_FLAGS_CONNECTED |
188 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
189 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
190 n_inp->sctp_features = inp->sctp_features;
191 n_inp->sctp_frag_point = inp->sctp_frag_point;
192 n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off;
193 n_inp->sctp_ecn_enable = inp->sctp_ecn_enable;
194 n_inp->partial_delivery_point = inp->partial_delivery_point;
195 n_inp->sctp_context = inp->sctp_context;
196 n_inp->inp_starting_point_for_iterator = NULL;
198 /* copy in the authentication parameters from the original endpoint */
199 if (n_inp->sctp_ep.local_hmacs)
200 sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
201 n_inp->sctp_ep.local_hmacs =
202 sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
203 if (n_inp->sctp_ep.local_auth_chunks)
204 sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
205 n_inp->sctp_ep.local_auth_chunks =
206 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
207 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
208 &n_inp->sctp_ep.shared_keys);
210 n_inp->sctp_socket = newso;
211 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
212 sctp_feature_off(n_inp, SCTP_PCB_FLAGS_AUTOCLOSE);
213 n_inp->sctp_ep.auto_close_time = 0;
214 sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, n_inp, stcb, NULL,
215 SCTP_FROM_SCTP_PEELOFF + SCTP_LOC_1);
217 /* Turn off any non-blocking semantic. */
218 SCTP_CLEAR_SO_NBIO(newso);
219 newso->so_state |= SS_ISCONNECTED;
220 /* We remove it right away */
222 #ifdef SCTP_LOCK_LOGGING
223 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) {
224 sctp_log_lock(inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_SOCK);
227 TAILQ_REMOVE(&head->so_comp, newso, so_list);
231 * Now we must move it from one hash table to another and get the
232 * stcb in the right place.
234 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
235 atomic_add_int(&stcb->asoc.refcnt, 1);
236 SCTP_TCB_UNLOCK(stcb);
238 * And now the final hack. We move data in the pending side i.e.
239 * head to the new socket buffer. Let the GRUBBING begin :-0
241 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
242 atomic_subtract_int(&stcb->asoc.refcnt, 1);