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comparison: netwerk/sctp/src/netinet/sctp_peeloff.c
netwerk/sctp/src/netinet/sctp_peeloff.c
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| -1:000000000000 | 0:e352f2ae1c0c |
|---|---|
| 1 /*- | |
| 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. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * a) Redistributions of source code must retain the above copyright notice, | |
| 10 * this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * b) Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in | |
| 14 * the documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its | |
| 17 * contributors may be used to endorse or promote products derived | |
| 18 * from this software without specific prior written permission. | |
| 19 * | |
| 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
| 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
| 30 * THE POSSIBILITY OF SUCH DAMAGE. | |
| 31 */ | |
| 32 | |
| 33 #ifdef __FreeBSD__ | |
| 34 #include <sys/cdefs.h> | |
| 35 __FBSDID("$FreeBSD: head/sys/netinet/sctp_peeloff.c 243565 2012-11-26 16:44:03Z tuexen $"); | |
| 36 #endif | |
| 37 | |
| 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> | |
| 49 | |
| 50 #if defined(__APPLE__) | |
| 51 #define APPLE_FILE_NO 5 | |
| 52 #endif | |
| 53 | |
| 54 int | |
| 55 sctp_can_peel_off(struct socket *head, sctp_assoc_t assoc_id) | |
| 56 { | |
| 57 struct sctp_inpcb *inp; | |
| 58 struct sctp_tcb *stcb; | |
| 59 uint32_t state; | |
| 60 | |
| 61 if (head == NULL) { | |
| 62 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EBADF); | |
| 63 return (EBADF); | |
| 64 } | |
| 65 inp = (struct sctp_inpcb *)head->so_pcb; | |
| 66 if (inp == NULL) { | |
| 67 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT); | |
| 68 return (EFAULT); | |
| 69 } | |
| 70 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || | |
| 71 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { | |
| 72 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EOPNOTSUPP); | |
| 73 return (EOPNOTSUPP); | |
| 74 } | |
| 75 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1); | |
| 76 if (stcb == NULL) { | |
| 77 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOENT); | |
| 78 return (ENOENT); | |
| 79 } | |
| 80 state = SCTP_GET_STATE((&stcb->asoc)); | |
| 81 if ((state == SCTP_STATE_EMPTY) || | |
| 82 (state == SCTP_STATE_INUSE)) { | |
| 83 SCTP_TCB_UNLOCK(stcb); | |
| 84 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN); | |
| 85 return (ENOTCONN); | |
| 86 } | |
| 87 SCTP_TCB_UNLOCK(stcb); | |
| 88 /* We are clear to peel this one off */ | |
| 89 return (0); | |
| 90 } | |
| 91 | |
| 92 int | |
| 93 sctp_do_peeloff(struct socket *head, struct socket *so, sctp_assoc_t assoc_id) | |
| 94 { | |
| 95 struct sctp_inpcb *inp, *n_inp; | |
| 96 struct sctp_tcb *stcb; | |
| 97 uint32_t state; | |
| 98 | |
| 99 inp = (struct sctp_inpcb *)head->so_pcb; | |
| 100 if (inp == NULL) { | |
| 101 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT); | |
| 102 return (EFAULT); | |
| 103 } | |
| 104 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1); | |
| 105 if (stcb == NULL) { | |
| 106 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN); | |
| 107 return (ENOTCONN); | |
| 108 } | |
| 109 | |
| 110 state = SCTP_GET_STATE((&stcb->asoc)); | |
| 111 if ((state == SCTP_STATE_EMPTY) || | |
| 112 (state == SCTP_STATE_INUSE)) { | |
| 113 SCTP_TCB_UNLOCK(stcb); | |
| 114 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN); | |
| 115 return (ENOTCONN); | |
| 116 } | |
| 117 | |
| 118 n_inp = (struct sctp_inpcb *)so->so_pcb; | |
| 119 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | | |
| 120 SCTP_PCB_FLAGS_CONNECTED | | |
| 121 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */ | |
| 122 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags)); | |
| 123 n_inp->sctp_socket = so; | |
| 124 n_inp->sctp_features = inp->sctp_features; | |
| 125 n_inp->sctp_mobility_features = inp->sctp_mobility_features; | |
| 126 n_inp->sctp_frag_point = inp->sctp_frag_point; | |
| 127 n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off; | |
| 128 n_inp->sctp_ecn_enable = inp->sctp_ecn_enable; | |
| 129 n_inp->partial_delivery_point = inp->partial_delivery_point; | |
| 130 n_inp->sctp_context = inp->sctp_context; | |
| 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); | |
| 144 #if defined(__Userspace__) | |
| 145 n_inp->ulp_info = inp->ulp_info; | |
| 146 n_inp->recv_callback = inp->recv_callback; | |
| 147 n_inp->send_callback = inp->send_callback; | |
| 148 n_inp->send_sb_threshold = inp->send_sb_threshold; | |
| 149 #endif | |
| 150 /* | |
| 151 * Now we must move it from one hash table to another and get the | |
| 152 * stcb in the right place. | |
| 153 */ | |
| 154 sctp_move_pcb_and_assoc(inp, n_inp, stcb); | |
| 155 atomic_add_int(&stcb->asoc.refcnt, 1); | |
| 156 SCTP_TCB_UNLOCK(stcb); | |
| 157 | |
| 158 #if defined(__FreeBSD__) | |
| 159 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT); | |
| 160 #else | |
| 161 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK); | |
| 162 #endif | |
| 163 atomic_subtract_int(&stcb->asoc.refcnt, 1); | |
| 164 | |
| 165 return (0); | |
| 166 } | |
| 167 | |
| 168 #if defined(HAVE_SCTP_PEELOFF_SOCKOPT) | |
| 169 struct socket * | |
| 170 sctp_get_peeloff(struct socket *head, sctp_assoc_t assoc_id, int *error) | |
| 171 { | |
| 172 #if defined(__Userspace__) | |
| 173 /* if __Userspace__ chooses to originally not support peeloff, put it here... */ | |
| 174 #endif | |
| 175 #if defined(__Panda__) | |
| 176 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EINVAL); | |
| 177 *error = EINVAL; | |
| 178 return (NULL); | |
| 179 #else | |
| 180 struct socket *newso; | |
| 181 struct sctp_inpcb *inp, *n_inp; | |
| 182 struct sctp_tcb *stcb; | |
| 183 | |
| 184 SCTPDBG(SCTP_DEBUG_PEEL1, "SCTP peel-off called\n"); | |
| 185 inp = (struct sctp_inpcb *)head->so_pcb; | |
| 186 if (inp == NULL) { | |
| 187 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, EFAULT); | |
| 188 *error = EFAULT; | |
| 189 return (NULL); | |
| 190 } | |
| 191 stcb = sctp_findassociation_ep_asocid(inp, assoc_id, 1); | |
| 192 if (stcb == NULL) { | |
| 193 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN); | |
| 194 *error = ENOTCONN; | |
| 195 return (NULL); | |
| 196 } | |
| 197 atomic_add_int(&stcb->asoc.refcnt, 1); | |
| 198 SCTP_TCB_UNLOCK(stcb); | |
| 199 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000 | |
| 200 CURVNET_SET(head->so_vnet); | |
| 201 #endif | |
| 202 newso = sonewconn(head, SS_ISCONNECTED | |
| 203 #if defined(__APPLE__) | |
| 204 , NULL | |
| 205 #elif defined(__Panda__) | |
| 206 /* place this socket in the assoc's vrf id */ | |
| 207 , NULL, stcb->asoc.vrf_id | |
| 208 #endif | |
| 209 ); | |
| 210 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000 | |
| 211 CURVNET_RESTORE(); | |
| 212 #endif | |
| 213 if (newso == NULL) { | |
| 214 SCTPDBG(SCTP_DEBUG_PEEL1, "sctp_peeloff:sonewconn failed\n"); | |
| 215 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_PEELOFF, ENOMEM); | |
| 216 *error = ENOMEM; | |
| 217 atomic_subtract_int(&stcb->asoc.refcnt, 1); | |
| 218 return (NULL); | |
| 219 | |
| 220 } | |
| 221 #if defined(__APPLE__) | |
| 222 else { | |
| 223 SCTP_SOCKET_LOCK(newso, 1); | |
| 224 } | |
| 225 #endif | |
| 226 SCTP_TCB_LOCK(stcb); | |
| 227 atomic_subtract_int(&stcb->asoc.refcnt, 1); | |
| 228 n_inp = (struct sctp_inpcb *)newso->so_pcb; | |
| 229 SOCK_LOCK(head); | |
| 230 n_inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | | |
| 231 SCTP_PCB_FLAGS_CONNECTED | | |
| 232 SCTP_PCB_FLAGS_IN_TCPPOOL | /* Turn on Blocking IO */ | |
| 233 (SCTP_PCB_COPY_FLAGS & inp->sctp_flags)); | |
| 234 n_inp->sctp_features = inp->sctp_features; | |
| 235 n_inp->sctp_frag_point = inp->sctp_frag_point; | |
| 236 n_inp->sctp_cmt_on_off = inp->sctp_cmt_on_off; | |
| 237 n_inp->sctp_ecn_enable = inp->sctp_ecn_enable; | |
| 238 n_inp->partial_delivery_point = inp->partial_delivery_point; | |
| 239 n_inp->sctp_context = inp->sctp_context; | |
| 240 n_inp->local_strreset_support = inp->local_strreset_support; | |
| 241 n_inp->inp_starting_point_for_iterator = NULL; | |
| 242 #if defined(__Userspace__) | |
| 243 n_inp->ulp_info = inp->ulp_info; | |
| 244 n_inp->recv_callback = inp->recv_callback; | |
| 245 n_inp->send_callback = inp->send_callback; | |
| 246 n_inp->send_sb_threshold = inp->send_sb_threshold; | |
| 247 #endif | |
| 248 | |
| 249 /* copy in the authentication parameters from the original endpoint */ | |
| 250 if (n_inp->sctp_ep.local_hmacs) | |
| 251 sctp_free_hmaclist(n_inp->sctp_ep.local_hmacs); | |
| 252 n_inp->sctp_ep.local_hmacs = | |
| 253 sctp_copy_hmaclist(inp->sctp_ep.local_hmacs); | |
| 254 if (n_inp->sctp_ep.local_auth_chunks) | |
| 255 sctp_free_chunklist(n_inp->sctp_ep.local_auth_chunks); | |
| 256 n_inp->sctp_ep.local_auth_chunks = | |
| 257 sctp_copy_chunklist(inp->sctp_ep.local_auth_chunks); | |
| 258 (void)sctp_copy_skeylist(&inp->sctp_ep.shared_keys, | |
| 259 &n_inp->sctp_ep.shared_keys); | |
| 260 | |
| 261 n_inp->sctp_socket = newso; | |
| 262 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) { | |
| 263 sctp_feature_off(n_inp, SCTP_PCB_FLAGS_AUTOCLOSE); | |
| 264 n_inp->sctp_ep.auto_close_time = 0; | |
| 265 sctp_timer_stop(SCTP_TIMER_TYPE_AUTOCLOSE, n_inp, stcb, NULL, | |
| 266 SCTP_FROM_SCTP_PEELOFF+SCTP_LOC_1); | |
| 267 } | |
| 268 /* Turn off any non-blocking semantic. */ | |
| 269 SCTP_CLEAR_SO_NBIO(newso); | |
| 270 newso->so_state |= SS_ISCONNECTED; | |
| 271 /* We remove it right away */ | |
| 272 | |
| 273 #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__Windows__) || defined(__Userspace__) | |
| 274 #ifdef SCTP_LOCK_LOGGING | |
| 275 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) { | |
| 276 sctp_log_lock(inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_SOCK); | |
| 277 } | |
| 278 #endif | |
| 279 TAILQ_REMOVE(&head->so_comp, newso, so_list); | |
| 280 head->so_qlen--; | |
| 281 SOCK_UNLOCK(head); | |
| 282 #else | |
| 283 newso = TAILQ_FIRST(&head->so_q); | |
| 284 if (soqremque(newso, 1) == 0) { | |
| 285 SCTP_PRINTF("soremque failed, peeloff-fails (invarients would panic)\n"); | |
| 286 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PEELOFF, ENOTCONN); | |
| 287 *error = ENOTCONN; | |
| 288 return (NULL); | |
| 289 | |
| 290 } | |
| 291 #endif | |
| 292 /* | |
| 293 * Now we must move it from one hash table to another and get the | |
| 294 * stcb in the right place. | |
| 295 */ | |
| 296 sctp_move_pcb_and_assoc(inp, n_inp, stcb); | |
| 297 atomic_add_int(&stcb->asoc.refcnt, 1); | |
| 298 SCTP_TCB_UNLOCK(stcb); | |
| 299 /* | |
| 300 * And now the final hack. We move data in the pending side i.e. | |
| 301 * head to the new socket buffer. Let the GRUBBING begin :-0 | |
| 302 */ | |
| 303 #if defined(__FreeBSD__) | |
| 304 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, SBL_WAIT); | |
| 305 #else | |
| 306 sctp_pull_off_control_to_new_inp(inp, n_inp, stcb, M_WAITOK); | |
| 307 #endif | |
| 308 atomic_subtract_int(&stcb->asoc.refcnt, 1); | |
| 309 return (newso); | |
| 310 #endif | |
| 311 } | |
| 312 #endif |
