2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, 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:
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10 * this list of conditions and the following disclaimer.
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33 #include <sys/cdefs.h>
34 __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;
57 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EBADF);
60 inp = (struct sctp_inpcb *)head->so_pcb;
62 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
65 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
66 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
67 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EOPNOTSUPP);
70 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
72 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOENT);
75 state = SCTP_GET_STATE((&stcb->asoc));
76 if ((state == SCTP_STATE_EMPTY) ||
77 (state == SCTP_STATE_INUSE)) {
78 SCTP_TCB_UNLOCK(stcb);
79 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
82 SCTP_TCB_UNLOCK(stcb);
83 /* We are clear to peel this one off */
88 sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id)
90 struct sctp_inpcb *inp, *n_inp;
91 struct sctp_tcb *stcb;
94 inp = (struct sctp_inpcb *)head->so_pcb;
96 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT);
99 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1);
101 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
104 state = SCTP_GET_STATE((&stcb->asoc));
105 if ((state == SCTP_STATE_EMPTY) ||
106 (state == SCTP_STATE_INUSE)) {
107 SCTP_TCB_UNLOCK(stcb);
108 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN);
111 n_inp = (struct sctp_inpcb *)so->so_pcb;
112 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
113 SCTP_PCB_FLAGS_CONNECTED |
114 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */
115 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags));
116 n_inp->sctp_socket = so;
117 n_inp->sctp_features = inp->sctp_features;
118 n_inp->sctp_mobility_features = inp->sctp_mobility_features;
119 n_inp->sctp_frag_point = inp->sctp_frag_point;
120 n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off;
121 n_inp->ecn_supported = inp->ecn_supported;
122 n_inp->prsctp_supported = inp->prsctp_supported;
123 n_inp->auth_supported = inp->auth_supported;
124 n_inp->asconf_supported = inp->asconf_supported;
125 n_inp->reconfig_supported = inp->reconfig_supported;
126 n_inp->nrsack_supported = inp->nrsack_supported;
127 n_inp->pktdrop_supported = inp->pktdrop_supported;
128 n_inp->partial_delivery_point = inp->partial_delivery_point;
129 n_inp->sctp_context = inp->sctp_context;
130 n_inp->max_cwnd = inp->max_cwnd;
131 n_inp->local_strreset_support = inp->local_strreset_support;
132 n_inp->inp_starting_point_for_iterator = NULL;
133 /* copy in the authentication parameters from the original endpoint */
134 if (n_inp->sctp_ep.local_hmacs)
135 sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs);
136 n_inp->sctp_ep.local_hmacs =
137 sctp_copy_hmaclist(inp->sctp_ep.local_hmacs);
138 if (n_inp->sctp_ep.local_auth_chunks)
139 sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks);
140 n_inp->sctp_ep.local_auth_chunks =
141 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks);
142 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys,
143 &n_inp->sctp_ep.shared_keys);
145 * Now we must move it from one hash table to another and get the
146 * stcb in the right place.
148 sctp_move_pcb_and_assoc(inp, n_inp, stcb);
149 atomic_add_int(&stcb->asoc.refcnt, 1);
150 SCTP_TCB_UNLOCK(stcb);
152 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT);
153 atomic_subtract_int(&stcb->asoc.refcnt, 1);