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1 | /* |
2 | * Copyright (c) 2012-2013 Apple Inc. All rights reserved. | |
3 | * | |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
5 | * | |
6 | * This file contains Original Code and/or Modifications of Original Code | |
7 | * as defined in and that are subject to the Apple Public Source License | |
8 | * Version 2.0 (the 'License'). You may not use this file except in | |
9 | * compliance with the License. The rights granted to you under the License | |
10 | * may not be used to create, or enable the creation or redistribution of, | |
11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
12 | * circumvent, violate, or enable the circumvention or violation of, any | |
13 | * terms of an Apple operating system software license agreement. | |
14 | * | |
15 | * Please obtain a copy of the License at | |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
17 | * | |
18 | * The Original Code and all software distributed under the License are | |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
23 | * Please see the License for the specific language governing rights and | |
24 | * limitations under the License. | |
25 | * | |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
27 | */ | |
28 | ||
29 | #include <sys/param.h> | |
30 | #include <sys/systm.h> | |
31 | #include <sys/kernel.h> | |
32 | #include <sys/socket.h> | |
33 | #include <sys/socketvar.h> | |
34 | #include <sys/protosw.h> | |
35 | #include <sys/mcache.h> | |
36 | #include <sys/syslog.h> | |
37 | #include <sys/proc.h> | |
38 | #include <sys/proc_internal.h> | |
39 | #include <sys/resourcevar.h> | |
40 | ||
41 | #include <net/if.h> | |
42 | #include <netinet/in.h> | |
43 | #include <netinet/in_var.h> | |
44 | #include <netinet/tcp.h> | |
45 | #include <netinet/tcp_fsm.h> | |
46 | #include <netinet/tcp_seq.h> | |
47 | #include <netinet/tcp_var.h> | |
48 | #include <netinet/tcp_timer.h> | |
49 | #include <netinet/mptcp_var.h> | |
50 | #include <netinet/mptcp_timer.h> | |
51 | ||
52 | #include <mach/sdt.h> | |
53 | ||
54 | static int mptcp_usr_attach(struct socket *, int, struct proc *); | |
55 | static int mptcp_usr_detach(struct socket *); | |
56 | static int mptcp_attach(struct socket *, struct proc *); | |
57 | static int mptcp_detach(struct socket *, struct mppcb *); | |
58 | static int mptcp_connectx(struct mptses *, struct sockaddr_list **, | |
59 | struct sockaddr_list **, struct proc *, uint32_t, associd_t, connid_t *, | |
60 | uint32_t, void *, uint32_t); | |
61 | static int mptcp_usr_connectx(struct socket *, struct sockaddr_list **, | |
62 | struct sockaddr_list **, struct proc *, uint32_t, associd_t, connid_t *, | |
63 | uint32_t, void *, uint32_t); | |
64 | static int mptcp_getassocids(struct mptses *, uint32_t *, user_addr_t); | |
65 | static int mptcp_getconnids(struct mptses *, associd_t, uint32_t *, | |
66 | user_addr_t); | |
67 | static int mptcp_getconninfo(struct mptses *, connid_t *, uint32_t *, | |
68 | uint32_t *, int32_t *, user_addr_t, socklen_t *, user_addr_t, socklen_t *, | |
69 | uint32_t *, user_addr_t, uint32_t *); | |
70 | static int mptcp_usr_control(struct socket *, u_long, caddr_t, struct ifnet *, | |
71 | struct proc *); | |
72 | static int mptcp_disconnectx(struct mptses *, associd_t, connid_t); | |
73 | static int mptcp_usr_disconnectx(struct socket *, associd_t, connid_t); | |
74 | static struct mptses *mptcp_usrclosed(struct mptses *); | |
75 | static int mptcp_usr_peeloff(struct socket *, associd_t, struct socket **); | |
76 | static int mptcp_peeloff(struct mptses *, associd_t, struct socket **); | |
77 | static int mptcp_usr_rcvd(struct socket *, int); | |
78 | static int mptcp_usr_send(struct socket *, int, struct mbuf *, | |
79 | struct sockaddr *, struct mbuf *, struct proc *); | |
80 | static int mptcp_usr_shutdown(struct socket *); | |
81 | static int mptcp_uiotombuf(struct uio *, int, int, uint32_t, struct mbuf **); | |
82 | static int mptcp_usr_sosend(struct socket *, struct sockaddr *, struct uio *, | |
83 | struct mbuf *, struct mbuf *, int); | |
84 | static int mptcp_usr_socheckopt(struct socket *, struct sockopt *); | |
85 | static int mptcp_setopt_apply(struct mptses *, struct mptopt *); | |
86 | static int mptcp_setopt(struct mptses *, struct sockopt *); | |
87 | static int mptcp_getopt(struct mptses *, struct sockopt *); | |
88 | static int mptcp_default_tcp_optval(struct mptses *, struct sockopt *, int *); | |
89 | static void mptcp_connorder_helper(struct mptsub *mpts); | |
90 | ||
91 | struct pr_usrreqs mptcp_usrreqs = { | |
92 | .pru_attach = mptcp_usr_attach, | |
93 | .pru_connectx = mptcp_usr_connectx, | |
94 | .pru_control = mptcp_usr_control, | |
95 | .pru_detach = mptcp_usr_detach, | |
96 | .pru_disconnectx = mptcp_usr_disconnectx, | |
97 | .pru_peeloff = mptcp_usr_peeloff, | |
98 | .pru_rcvd = mptcp_usr_rcvd, | |
99 | .pru_send = mptcp_usr_send, | |
100 | .pru_shutdown = mptcp_usr_shutdown, | |
101 | .pru_sosend = mptcp_usr_sosend, | |
102 | .pru_soreceive = soreceive, | |
103 | .pru_socheckopt = mptcp_usr_socheckopt, | |
104 | }; | |
105 | ||
106 | /* | |
107 | * Attaches an MPTCP control block to a socket. | |
108 | */ | |
109 | static int | |
110 | mptcp_usr_attach(struct socket *mp_so, int proto, struct proc *p) | |
111 | { | |
112 | #pragma unused(proto) | |
113 | int error; | |
114 | ||
115 | VERIFY(sotomppcb(mp_so) == NULL); | |
116 | ||
117 | error = mptcp_attach(mp_so, p); | |
118 | if (error != 0) | |
119 | goto out; | |
120 | /* | |
121 | * XXX: adi@apple.com | |
122 | * | |
123 | * Might want to use a different SO_LINGER timeout than TCP's? | |
124 | */ | |
125 | if ((mp_so->so_options & SO_LINGER) && mp_so->so_linger == 0) | |
126 | mp_so->so_linger = TCP_LINGERTIME * hz; | |
127 | out: | |
128 | return (error); | |
129 | } | |
130 | ||
131 | /* | |
132 | * Detaches an MPTCP control block from a socket. | |
133 | */ | |
134 | static int | |
135 | mptcp_usr_detach(struct socket *mp_so) | |
136 | { | |
137 | struct mppcb *mpp = sotomppcb(mp_so); | |
138 | int error = 0; | |
139 | ||
140 | VERIFY(mpp != NULL); | |
141 | VERIFY(mpp->mpp_socket != NULL); | |
142 | ||
143 | error = mptcp_detach(mp_so, mpp); | |
144 | return (error); | |
145 | } | |
146 | ||
147 | /* | |
148 | * Attach MPTCP protocol to socket, allocating MP control block, | |
149 | * MPTCP session, control block, buffer space, etc. | |
150 | */ | |
151 | static int | |
152 | mptcp_attach(struct socket *mp_so, struct proc *p) | |
153 | { | |
154 | #pragma unused(p) | |
155 | struct mptses *mpte; | |
156 | struct mptcb *mp_tp; | |
157 | struct mppcb *mpp; | |
158 | int error = 0; | |
159 | ||
160 | if (mp_so->so_snd.sb_hiwat == 0 || mp_so->so_rcv.sb_hiwat == 0) { | |
161 | error = soreserve(mp_so, tcp_sendspace, MPTCP_RWIN_MAX); | |
162 | if (error != 0) | |
163 | goto out; | |
164 | } | |
165 | ||
166 | /* | |
167 | * MPTCP socket buffers cannot be compressed, due to the | |
168 | * fact that each mbuf chained via m_next is a M_PKTHDR | |
169 | * which carries some MPTCP metadata. | |
170 | */ | |
171 | mp_so->so_snd.sb_flags |= SB_NOCOMPRESS; | |
172 | mp_so->so_rcv.sb_flags |= SB_NOCOMPRESS; | |
173 | ||
174 | /* Disable socket buffer auto-tuning. */ | |
175 | mp_so->so_rcv.sb_flags &= ~SB_AUTOSIZE; | |
176 | mp_so->so_snd.sb_flags &= ~SB_AUTOSIZE; | |
177 | ||
178 | if ((error = mp_pcballoc(mp_so, &mtcbinfo)) != 0) | |
179 | goto out; | |
180 | ||
181 | mpp = sotomppcb(mp_so); | |
182 | VERIFY(mpp != NULL); | |
183 | ||
184 | mpte = mptcp_sescreate(mp_so, mpp); | |
185 | if (mpte == NULL) { | |
186 | mp_pcbdetach(mpp); | |
187 | error = ENOBUFS; | |
188 | goto out; | |
189 | } | |
190 | mp_tp = mpte->mpte_mptcb; | |
191 | VERIFY(mp_tp != NULL); | |
192 | ||
193 | MPT_LOCK(mp_tp); | |
194 | mp_tp->mpt_state = MPTCPS_CLOSED; | |
195 | MPT_UNLOCK(mp_tp); | |
196 | ||
197 | out: | |
198 | return (error); | |
199 | } | |
200 | ||
201 | /* | |
202 | * Called when the socket layer loses its final reference to the socket; | |
203 | * at this point, there is only one case in which we will keep things | |
204 | * around: time wait. | |
205 | */ | |
206 | static int | |
207 | mptcp_detach(struct socket *mp_so, struct mppcb *mpp) | |
208 | { | |
209 | struct mptses *mpte; | |
210 | struct mppcbinfo *mppi; | |
211 | ||
212 | VERIFY(mp_so->so_pcb == mpp); | |
213 | VERIFY(mpp->mpp_socket == mp_so); | |
214 | ||
215 | mppi = mpp->mpp_pcbinfo; | |
216 | VERIFY(mppi != NULL); | |
217 | ||
218 | mpte = &((struct mpp_mtp *)mpp)->mpp_ses; | |
219 | VERIFY(mpte->mpte_mppcb == mpp); | |
220 | ||
221 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
222 | ||
223 | /* | |
224 | * We are done with this MPTCP socket (it has been closed); | |
225 | * trigger all subflows to be disconnected, if not already, | |
226 | * by initiating the PCB detach sequence (SOF_PCBCLEARING | |
227 | * will be set.) | |
228 | */ | |
229 | mp_pcbdetach(mpp); | |
230 | ||
231 | (void) mptcp_disconnectx(mpte, ASSOCID_ALL, CONNID_ALL); | |
232 | ||
233 | /* | |
234 | * XXX: adi@apple.com | |
235 | * | |
236 | * Here, we would want to handle time wait state. | |
237 | */ | |
238 | ||
239 | return (0); | |
240 | } | |
241 | ||
242 | /* | |
243 | * Common subroutine to open a MPTCP connection to one of the remote hosts | |
244 | * specified by dst_sl. This includes allocating and establishing a | |
245 | * subflow TCP connection, either initially to establish MPTCP connection, | |
246 | * or to join an existing one. Returns a connection handle upon success. | |
247 | */ | |
248 | static int | |
249 | mptcp_connectx(struct mptses *mpte, struct sockaddr_list **src_sl, | |
250 | struct sockaddr_list **dst_sl, struct proc *p, uint32_t ifscope, | |
251 | associd_t aid, connid_t *pcid, uint32_t flags, void *arg, | |
252 | uint32_t arglen) | |
253 | { | |
254 | #pragma unused(p, aid, flags, arg, arglen) | |
255 | struct mptsub *mpts; | |
256 | struct socket *mp_so; | |
257 | int error = 0; | |
258 | ||
259 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
260 | mp_so = mpte->mpte_mppcb->mpp_socket; | |
261 | ||
262 | VERIFY(dst_sl != NULL && *dst_sl != NULL); | |
263 | VERIFY(pcid != NULL); | |
264 | ||
265 | mptcplog((LOG_DEBUG, "%s: mp_so 0x%llx\n", __func__, | |
266 | (u_int64_t)VM_KERNEL_ADDRPERM(mp_so))); | |
267 | DTRACE_MPTCP3(connectx, struct mptses *, mpte, associd_t, aid, | |
268 | struct socket *, mp_so); | |
269 | ||
270 | mpts = mptcp_subflow_alloc(M_WAITOK); | |
271 | if (mpts == NULL) { | |
272 | error = ENOBUFS; | |
273 | goto out; | |
274 | } | |
275 | MPTS_ADDREF(mpts); /* for this routine */ | |
276 | ||
277 | if (src_sl != NULL) { | |
278 | mpts->mpts_src_sl = *src_sl; | |
279 | *src_sl = NULL; | |
280 | } | |
281 | mpts->mpts_dst_sl = *dst_sl; | |
282 | *dst_sl = NULL; | |
283 | ||
284 | error = mptcp_subflow_add(mpte, mpts, p, ifscope); | |
285 | if (error == 0 && pcid != NULL) | |
286 | *pcid = mpts->mpts_connid; | |
287 | ||
288 | out: | |
289 | if (mpts != NULL) { | |
290 | if ((error != 0) && (error != EWOULDBLOCK)) { | |
291 | MPTS_LOCK(mpts); | |
292 | if (mpts->mpts_flags & MPTSF_ATTACHED) { | |
293 | MPTS_UNLOCK(mpts); | |
294 | MPTS_REMREF(mpts); | |
295 | mptcp_subflow_del(mpte, mpts, TRUE); | |
296 | return (error); | |
297 | } | |
298 | MPTS_UNLOCK(mpts); | |
299 | } | |
300 | MPTS_REMREF(mpts); | |
301 | } | |
302 | ||
303 | return (error); | |
304 | } | |
305 | ||
306 | /* | |
307 | * User-protocol pru_connectx callback. | |
308 | */ | |
309 | static int | |
310 | mptcp_usr_connectx(struct socket *mp_so, struct sockaddr_list **src_sl, | |
311 | struct sockaddr_list **dst_sl, struct proc *p, uint32_t ifscope, | |
312 | associd_t aid, connid_t *pcid, uint32_t flags, void *arg, | |
313 | uint32_t arglen) | |
314 | { | |
315 | #pragma unused(arg, arglen) | |
316 | struct mppcb *mpp = sotomppcb(mp_so); | |
317 | struct mptses *mpte; | |
318 | int error = 0; | |
319 | ||
320 | if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) { | |
321 | error = EINVAL; | |
322 | goto out; | |
323 | } | |
324 | mpte = mptompte(mpp); | |
325 | VERIFY(mpte != NULL); | |
326 | ||
327 | error = mptcp_connectx(mpte, src_sl, dst_sl, p, ifscope, | |
328 | aid, pcid, flags, arg, arglen); | |
329 | out: | |
330 | return (error); | |
331 | } | |
332 | ||
333 | /* | |
334 | * Handle SIOCGASSOCIDS ioctl for PF_MULTIPATH domain. | |
335 | */ | |
336 | static int | |
337 | mptcp_getassocids(struct mptses *mpte, uint32_t *cnt, user_addr_t aidp) | |
338 | { | |
339 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
340 | ||
341 | /* MPTCP has at most 1 association */ | |
342 | *cnt = (mpte->mpte_associd != ASSOCID_ANY) ? 1 : 0; | |
343 | ||
344 | /* just asking how many there are? */ | |
345 | if (aidp == USER_ADDR_NULL) | |
346 | return (0); | |
347 | ||
348 | return (copyout(&mpte->mpte_associd, aidp, | |
349 | sizeof (mpte->mpte_associd))); | |
350 | } | |
351 | ||
352 | /* | |
353 | * Handle SIOCGCONNIDS ioctl for PF_MULTIPATH domain. | |
354 | */ | |
355 | static int | |
356 | mptcp_getconnids(struct mptses *mpte, associd_t aid, uint32_t *cnt, | |
357 | user_addr_t cidp) | |
358 | { | |
359 | struct mptsub *mpts; | |
360 | int error = 0; | |
361 | ||
362 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
363 | ||
364 | if (aid != ASSOCID_ANY && aid != ASSOCID_ALL && | |
365 | aid != mpte->mpte_associd) | |
366 | return (EINVAL); | |
367 | ||
368 | *cnt = mpte->mpte_numflows; | |
369 | ||
370 | /* just asking how many there are? */ | |
371 | if (cidp == USER_ADDR_NULL) | |
372 | return (0); | |
373 | ||
374 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
375 | if ((error = copyout(&mpts->mpts_connid, cidp, | |
376 | sizeof (mpts->mpts_connid))) != 0) | |
377 | break; | |
378 | ||
379 | cidp += sizeof (mpts->mpts_connid); | |
380 | } | |
381 | ||
382 | return (error); | |
383 | } | |
384 | ||
385 | /* | |
386 | * Handle SIOCGCONNINFO ioctl for PF_MULTIPATH domain. | |
387 | */ | |
388 | static int | |
389 | mptcp_getconninfo(struct mptses *mpte, connid_t *cid, uint32_t *flags, | |
390 | uint32_t *ifindex, int32_t *soerror, user_addr_t src, socklen_t *src_len, | |
391 | user_addr_t dst, socklen_t *dst_len, uint32_t *aux_type, | |
392 | user_addr_t aux_data, uint32_t *aux_len) | |
393 | { | |
394 | #pragma unused(aux_data) | |
395 | struct sockaddr_entry *se; | |
396 | struct ifnet *ifp = NULL; | |
397 | struct mptsub *mpts; | |
398 | int error = 0; | |
399 | ||
400 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
401 | ||
402 | if (*cid == CONNID_ALL) | |
403 | return (EINVAL); | |
404 | ||
405 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
406 | if (mpts->mpts_connid == *cid || *cid == CONNID_ANY) | |
407 | break; | |
408 | } | |
409 | if (mpts == NULL) | |
410 | return ((*cid == CONNID_ANY) ? ENXIO : EINVAL); | |
411 | ||
412 | MPTS_LOCK(mpts); | |
413 | ifp = mpts->mpts_outif; | |
414 | *cid = mpts->mpts_connid; | |
415 | *ifindex = ((ifp != NULL) ? ifp->if_index : 0); | |
416 | *soerror = mpts->mpts_soerror; | |
417 | *flags = 0; | |
418 | if (mpts->mpts_flags & MPTSF_CONNECTING) | |
419 | *flags |= CIF_CONNECTING; | |
420 | if (mpts->mpts_flags & MPTSF_CONNECTED) | |
421 | *flags |= CIF_CONNECTED; | |
422 | if (mpts->mpts_flags & MPTSF_DISCONNECTING) | |
423 | *flags |= CIF_DISCONNECTING; | |
424 | if (mpts->mpts_flags & MPTSF_DISCONNECTED) | |
425 | *flags |= CIF_DISCONNECTED; | |
426 | if (mpts->mpts_flags & MPTSF_BOUND_IF) | |
427 | *flags |= CIF_BOUND_IF; | |
428 | if (mpts->mpts_flags & MPTSF_BOUND_IP) | |
429 | *flags |= CIF_BOUND_IP; | |
430 | if (mpts->mpts_flags & MPTSF_BOUND_PORT) | |
431 | *flags |= CIF_BOUND_PORT; | |
432 | if (mpts->mpts_flags & MPTSF_PREFERRED) | |
433 | *flags |= CIF_PREFERRED; | |
434 | if (mpts->mpts_flags & MPTSF_MP_CAPABLE) | |
435 | *flags |= CIF_MP_CAPABLE; | |
436 | if (mpts->mpts_flags & MPTSF_MP_DEGRADED) | |
437 | *flags |= CIF_MP_DEGRADED; | |
438 | if (mpts->mpts_flags & MPTSF_MP_READY) | |
439 | *flags |= CIF_MP_READY; | |
440 | if (mpts->mpts_flags & MPTSF_ACTIVE) | |
441 | *flags |= CIF_MP_ACTIVE; | |
442 | ||
443 | VERIFY(mpts->mpts_src_sl != NULL); | |
444 | se = TAILQ_FIRST(&mpts->mpts_src_sl->sl_head); | |
445 | VERIFY(se != NULL && se->se_addr != NULL); | |
446 | *src_len = se->se_addr->sa_len; | |
447 | if (src != USER_ADDR_NULL) { | |
448 | error = copyout(se->se_addr, src, se->se_addr->sa_len); | |
449 | if (error != 0) | |
450 | goto out; | |
451 | } | |
452 | ||
453 | VERIFY(mpts->mpts_dst_sl != NULL); | |
454 | se = TAILQ_FIRST(&mpts->mpts_dst_sl->sl_head); | |
455 | VERIFY(se != NULL && se->se_addr != NULL); | |
456 | *dst_len = se->se_addr->sa_len; | |
457 | if (dst != USER_ADDR_NULL) { | |
458 | error = copyout(se->se_addr, dst, se->se_addr->sa_len); | |
459 | if (error != 0) | |
460 | goto out; | |
461 | } | |
462 | ||
463 | *aux_type = 0; | |
464 | *aux_len = 0; | |
465 | if (mpts->mpts_socket != NULL) { | |
466 | struct conninfo_tcp tcp_ci; | |
467 | ||
468 | *aux_type = CIAUX_TCP; | |
469 | *aux_len = sizeof (tcp_ci); | |
470 | ||
471 | if (aux_data != USER_ADDR_NULL) { | |
472 | struct socket *so = mpts->mpts_socket; | |
473 | ||
474 | VERIFY(SOCK_PROTO(so) == IPPROTO_TCP); | |
475 | bzero(&tcp_ci, sizeof (tcp_ci)); | |
476 | socket_lock(so, 0); | |
477 | tcp_getconninfo(so, &tcp_ci); | |
478 | socket_unlock(so, 0); | |
479 | error = copyout(&tcp_ci, aux_data, sizeof (tcp_ci)); | |
480 | if (error != 0) | |
481 | goto out; | |
482 | } | |
483 | } | |
484 | out: | |
485 | MPTS_UNLOCK(mpts); | |
486 | return (error); | |
487 | } | |
488 | ||
489 | /* | |
490 | * Handle SIOCSCONNORDER | |
491 | */ | |
492 | int | |
493 | mptcp_setconnorder(struct mptses *mpte, connid_t cid, uint32_t rank) | |
494 | { | |
495 | struct mptsub *mpts, *mpts1; | |
496 | int error = 0; | |
497 | ||
498 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
499 | mptcplog((LOG_DEBUG, "%s: cid %d rank %d \n", __func__, cid, rank)); | |
500 | ||
501 | if (cid == CONNID_ANY || cid == CONNID_ALL) { | |
502 | error = EINVAL; | |
503 | goto out; | |
504 | } | |
505 | ||
506 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
507 | if (mpts->mpts_connid == cid) | |
508 | break; | |
509 | } | |
510 | if (mpts == NULL) { | |
511 | error = ENXIO; | |
512 | goto out; | |
513 | } | |
514 | ||
515 | if (rank == 0 || rank > 1) { | |
516 | /* | |
517 | * If rank is 0, determine whether this should be the | |
518 | * primary or backup subflow, depending on what we have. | |
519 | * | |
520 | * Otherwise, if greater than 0, make it a backup flow. | |
521 | */ | |
522 | TAILQ_FOREACH(mpts1, &mpte->mpte_subflows, mpts_entry) { | |
523 | MPTS_LOCK(mpts1); | |
524 | if (mpts1->mpts_flags & MPTSF_PREFERRED) { | |
525 | MPTS_UNLOCK(mpts1); | |
526 | break; | |
527 | } | |
528 | MPTS_UNLOCK(mpts1); | |
529 | } | |
530 | ||
531 | MPTS_LOCK(mpts); | |
532 | mpts->mpts_flags &= ~MPTSF_PREFERRED; | |
533 | mpts->mpts_rank = rank; | |
534 | if (mpts1 != NULL && mpts != mpts1) { | |
535 | /* preferred subflow found; set rank as necessary */ | |
536 | if (rank == 0) | |
537 | mpts->mpts_rank = (mpts1->mpts_rank + 1); | |
538 | } else if (rank == 0) { | |
539 | /* no preferred one found; promote this */ | |
540 | rank = 1; | |
541 | } | |
542 | MPTS_UNLOCK(mpts); | |
543 | } | |
544 | ||
545 | if (rank == 1) { | |
546 | /* | |
547 | * If rank is 1, promote this subflow to be preferred. | |
548 | */ | |
549 | TAILQ_FOREACH(mpts1, &mpte->mpte_subflows, mpts_entry) { | |
550 | MPTS_LOCK(mpts1); | |
551 | if (mpts1 != mpts && | |
552 | (mpts1->mpts_flags & MPTSF_PREFERRED)) { | |
553 | mpts1->mpts_flags &= ~MPTSF_PREFERRED; | |
554 | if (mpte->mpte_nummpcapflows > 1) | |
555 | mptcp_connorder_helper(mpts1); | |
556 | } else if (mpts1 == mpts) { | |
557 | mpts1->mpts_rank = 1; | |
558 | if (mpts1->mpts_flags & MPTSF_MP_CAPABLE) { | |
559 | mpts1->mpts_flags |= MPTSF_PREFERRED; | |
560 | if (mpte->mpte_nummpcapflows > 1) | |
561 | mptcp_connorder_helper(mpts1); | |
562 | } | |
563 | } | |
564 | MPTS_UNLOCK(mpts1); | |
565 | } | |
566 | } | |
567 | ||
568 | out: | |
569 | return (error); | |
570 | } | |
571 | ||
572 | static void | |
573 | mptcp_connorder_helper(struct mptsub *mpts) | |
574 | { | |
575 | struct socket *so = mpts->mpts_socket; | |
576 | struct tcpcb *tp = NULL; | |
577 | ||
578 | socket_lock(so, 0); | |
579 | ||
580 | tp = intotcpcb(sotoinpcb(so)); | |
581 | tp->t_mpflags |= TMPF_SND_MPPRIO; | |
582 | if (mpts->mpts_flags & MPTSF_PREFERRED) | |
583 | tp->t_mpflags &= ~TMPF_BACKUP_PATH; | |
584 | else | |
585 | tp->t_mpflags |= TMPF_BACKUP_PATH; | |
586 | mptcplog((LOG_DEBUG, "%s cid %d flags %x", __func__, | |
587 | mpts->mpts_connid, mpts->mpts_flags)); | |
588 | socket_unlock(so, 0); | |
589 | ||
590 | } | |
591 | ||
592 | /* | |
593 | * Handle SIOCSGONNORDER | |
594 | */ | |
595 | int | |
596 | mptcp_getconnorder(struct mptses *mpte, connid_t cid, uint32_t *rank) | |
597 | { | |
598 | struct mptsub *mpts; | |
599 | int error = 0; | |
600 | ||
601 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
602 | VERIFY(rank != NULL); | |
603 | *rank = 0; | |
604 | ||
605 | if (cid == CONNID_ANY || cid == CONNID_ALL) { | |
606 | error = EINVAL; | |
607 | goto out; | |
608 | } | |
609 | ||
610 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
611 | if (mpts->mpts_connid == cid) | |
612 | break; | |
613 | } | |
614 | if (mpts == NULL) { | |
615 | error = ENXIO; | |
616 | goto out; | |
617 | } | |
618 | ||
619 | MPTS_LOCK(mpts); | |
620 | *rank = mpts->mpts_rank; | |
621 | MPTS_UNLOCK(mpts); | |
622 | out: | |
623 | return (error); | |
624 | } | |
625 | ||
626 | /* | |
627 | * User-protocol pru_control callback. | |
628 | */ | |
629 | static int | |
630 | mptcp_usr_control(struct socket *mp_so, u_long cmd, caddr_t data, | |
631 | struct ifnet *ifp, struct proc *p) | |
632 | { | |
633 | #pragma unused(ifp, p) | |
634 | struct mppcb *mpp = sotomppcb(mp_so); | |
635 | struct mptses *mpte; | |
636 | int error = 0; | |
637 | ||
638 | if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) { | |
639 | error = EINVAL; | |
640 | goto out; | |
641 | } | |
642 | mpte = mptompte(mpp); | |
643 | VERIFY(mpte != NULL); | |
644 | ||
645 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
646 | ||
647 | switch (cmd) { | |
648 | case SIOCGASSOCIDS32: { /* struct so_aidreq32 */ | |
649 | struct so_aidreq32 aidr; | |
650 | bcopy(data, &aidr, sizeof (aidr)); | |
651 | error = mptcp_getassocids(mpte, &aidr.sar_cnt, | |
652 | aidr.sar_aidp); | |
653 | if (error == 0) | |
654 | bcopy(&aidr, data, sizeof (aidr)); | |
655 | break; | |
656 | } | |
657 | ||
658 | case SIOCGASSOCIDS64: { /* struct so_aidreq64 */ | |
659 | struct so_aidreq64 aidr; | |
660 | bcopy(data, &aidr, sizeof (aidr)); | |
661 | error = mptcp_getassocids(mpte, &aidr.sar_cnt, | |
662 | aidr.sar_aidp); | |
663 | if (error == 0) | |
664 | bcopy(&aidr, data, sizeof (aidr)); | |
665 | break; | |
666 | } | |
667 | ||
668 | case SIOCGCONNIDS32: { /* struct so_cidreq32 */ | |
669 | struct so_cidreq32 cidr; | |
670 | bcopy(data, &cidr, sizeof (cidr)); | |
671 | error = mptcp_getconnids(mpte, cidr.scr_aid, &cidr.scr_cnt, | |
672 | cidr.scr_cidp); | |
673 | if (error == 0) | |
674 | bcopy(&cidr, data, sizeof (cidr)); | |
675 | break; | |
676 | } | |
677 | ||
678 | case SIOCGCONNIDS64: { /* struct so_cidreq64 */ | |
679 | struct so_cidreq64 cidr; | |
680 | bcopy(data, &cidr, sizeof (cidr)); | |
681 | error = mptcp_getconnids(mpte, cidr.scr_aid, &cidr.scr_cnt, | |
682 | cidr.scr_cidp); | |
683 | if (error == 0) | |
684 | bcopy(&cidr, data, sizeof (cidr)); | |
685 | break; | |
686 | } | |
687 | ||
688 | case SIOCGCONNINFO32: { /* struct so_cinforeq32 */ | |
689 | struct so_cinforeq32 cifr; | |
690 | bcopy(data, &cifr, sizeof (cifr)); | |
691 | error = mptcp_getconninfo(mpte, &cifr.scir_cid, | |
692 | &cifr.scir_flags, &cifr.scir_ifindex, &cifr.scir_error, | |
693 | cifr.scir_src, &cifr.scir_src_len, cifr.scir_dst, | |
694 | &cifr.scir_dst_len, &cifr.scir_aux_type, cifr.scir_aux_data, | |
695 | &cifr.scir_aux_len); | |
696 | if (error == 0) | |
697 | bcopy(&cifr, data, sizeof (cifr)); | |
698 | break; | |
699 | } | |
700 | ||
701 | case SIOCGCONNINFO64: { /* struct so_cinforeq64 */ | |
702 | struct so_cinforeq64 cifr; | |
703 | bcopy(data, &cifr, sizeof (cifr)); | |
704 | error = mptcp_getconninfo(mpte, &cifr.scir_cid, | |
705 | &cifr.scir_flags, &cifr.scir_ifindex, &cifr.scir_error, | |
706 | cifr.scir_src, &cifr.scir_src_len, cifr.scir_dst, | |
707 | &cifr.scir_dst_len, &cifr.scir_aux_type, cifr.scir_aux_data, | |
708 | &cifr.scir_aux_len); | |
709 | if (error == 0) | |
710 | bcopy(&cifr, data, sizeof (cifr)); | |
711 | break; | |
712 | } | |
713 | ||
714 | case SIOCSCONNORDER: { /* struct so_cordreq */ | |
715 | struct so_cordreq cor; | |
716 | bcopy(data, &cor, sizeof (cor)); | |
717 | error = mptcp_setconnorder(mpte, cor.sco_cid, cor.sco_rank); | |
718 | if (error == 0) | |
719 | bcopy(&cor, data, sizeof (cor)); | |
720 | break; | |
721 | } | |
722 | ||
723 | case SIOCGCONNORDER: { /* struct so_cordreq */ | |
724 | struct so_cordreq cor; | |
725 | bcopy(data, &cor, sizeof (cor)); | |
726 | error = mptcp_getconnorder(mpte, cor.sco_cid, &cor.sco_rank); | |
727 | if (error == 0) | |
728 | bcopy(&cor, data, sizeof (cor)); | |
729 | break; | |
730 | } | |
731 | ||
732 | default: | |
733 | error = EOPNOTSUPP; | |
734 | break; | |
735 | } | |
736 | out: | |
737 | return (error); | |
738 | } | |
739 | ||
740 | /* | |
741 | * Initiate a disconnect. MPTCP-level disconnection is specified by | |
742 | * CONNID_{ANY,ALL}. Otherwise, selectively disconnect a subflow | |
743 | * connection while keeping the MPTCP-level connection (association). | |
744 | */ | |
745 | static int | |
746 | mptcp_disconnectx(struct mptses *mpte, associd_t aid, connid_t cid) | |
747 | { | |
748 | struct mptsub *mpts; | |
749 | struct socket *mp_so; | |
750 | struct mptcb *mp_tp; | |
751 | int error = 0; | |
752 | ||
753 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
754 | ||
755 | mp_so = mpte->mpte_mppcb->mpp_socket; | |
756 | mp_tp = mpte->mpte_mptcb; | |
757 | ||
758 | mptcplog((LOG_DEBUG, "%s: mp_so 0x%llx aid %d cid %d\n", __func__, | |
759 | (u_int64_t)VM_KERNEL_ADDRPERM(mp_so), aid, cid)); | |
760 | DTRACE_MPTCP5(disconnectx, struct mptses *, mpte, associd_t, aid, | |
761 | connid_t, cid, struct socket *, mp_so, struct mptcb *, mp_tp); | |
762 | ||
763 | VERIFY(aid == ASSOCID_ANY || aid == ASSOCID_ALL || | |
764 | aid == mpte->mpte_associd); | |
765 | ||
766 | /* terminate the association? */ | |
767 | if (cid == CONNID_ANY || cid == CONNID_ALL) { | |
768 | /* if we're not detached, go thru socket state checks */ | |
769 | if (!(mp_so->so_flags & SOF_PCBCLEARING)) { | |
770 | if (!(mp_so->so_state & (SS_ISCONNECTED| | |
771 | SS_ISCONNECTING))) { | |
772 | error = ENOTCONN; | |
773 | goto out; | |
774 | } | |
775 | if (mp_so->so_state & SS_ISDISCONNECTING) { | |
776 | error = EALREADY; | |
777 | goto out; | |
778 | } | |
779 | } | |
780 | MPT_LOCK(mp_tp); | |
781 | mptcp_cancel_all_timers(mp_tp); | |
782 | if (mp_tp->mpt_state < MPTCPS_ESTABLISHED) { | |
783 | (void) mptcp_close(mpte, mp_tp); | |
784 | MPT_UNLOCK(mp_tp); | |
785 | } else if ((mp_so->so_options & SO_LINGER) && | |
786 | mp_so->so_linger == 0) { | |
787 | (void) mptcp_drop(mpte, mp_tp, 0); | |
788 | MPT_UNLOCK(mp_tp); | |
789 | } else { | |
790 | MPT_UNLOCK(mp_tp); | |
791 | soisdisconnecting(mp_so); | |
792 | sbflush(&mp_so->so_rcv); | |
793 | if (mptcp_usrclosed(mpte) != NULL) | |
794 | (void) mptcp_output(mpte); | |
795 | } | |
796 | } else { | |
797 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
798 | if (mpts->mpts_connid != cid) | |
799 | continue; | |
800 | MPTS_LOCK(mpts); | |
801 | mptcp_subflow_disconnect(mpte, mpts, FALSE); | |
802 | MPTS_UNLOCK(mpts); | |
803 | break; | |
804 | } | |
805 | ||
806 | if (mpts == NULL) { | |
807 | error = EINVAL; | |
808 | goto out; | |
809 | } | |
810 | } | |
811 | ||
812 | if (error == 0) | |
813 | mptcp_thread_signal(mpte); | |
814 | ||
815 | if ((mp_so->so_state & (SS_CANTRCVMORE | SS_CANTSENDMORE)) == | |
816 | (SS_CANTRCVMORE | SS_CANTSENDMORE)) { | |
817 | /* the socket has been shutdown, no more sockopt's */ | |
818 | mptcp_flush_sopts(mpte); | |
819 | } | |
820 | ||
821 | out: | |
822 | return (error); | |
823 | } | |
824 | ||
825 | /* | |
826 | * User-protocol pru_disconnectx callback. | |
827 | */ | |
828 | static int | |
829 | mptcp_usr_disconnectx(struct socket *mp_so, associd_t aid, connid_t cid) | |
830 | { | |
831 | struct mppcb *mpp = sotomppcb(mp_so); | |
832 | struct mptses *mpte; | |
833 | int error = 0; | |
834 | ||
835 | if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) { | |
836 | error = EINVAL; | |
837 | goto out; | |
838 | } | |
839 | mpte = mptompte(mpp); | |
840 | VERIFY(mpte != NULL); | |
841 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
842 | ||
843 | if (aid != ASSOCID_ANY && aid != ASSOCID_ALL && | |
844 | aid != mpte->mpte_associd) { | |
845 | error = EINVAL; | |
846 | goto out; | |
847 | } | |
848 | ||
849 | error = mptcp_disconnectx(mpte, aid, cid); | |
850 | out: | |
851 | return (error); | |
852 | } | |
853 | ||
854 | /* | |
855 | * User issued close, and wish to trail thru shutdown states. | |
856 | */ | |
857 | static struct mptses * | |
858 | mptcp_usrclosed(struct mptses *mpte) | |
859 | { | |
860 | struct socket *mp_so; | |
861 | struct mptcb *mp_tp; | |
862 | struct mptsub *mpts; | |
863 | ||
864 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
865 | mp_so = mpte->mpte_mppcb->mpp_socket; | |
866 | mp_tp = mpte->mpte_mptcb; | |
867 | ||
868 | MPT_LOCK(mp_tp); | |
869 | mptcp_close_fsm(mp_tp, MPCE_CLOSE); | |
870 | ||
871 | if (mp_tp->mpt_state == TCPS_CLOSED) { | |
872 | mpte = mptcp_close(mpte, mp_tp); | |
873 | MPT_UNLOCK(mp_tp); | |
874 | } else if (mp_tp->mpt_state >= MPTCPS_FIN_WAIT_2) { | |
875 | MPT_UNLOCK(mp_tp); | |
876 | soisdisconnected(mp_so); | |
877 | } else { | |
878 | mp_tp->mpt_sndmax += 1; /* adjust for Data FIN */ | |
879 | MPT_UNLOCK(mp_tp); | |
880 | ||
881 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
882 | MPTS_LOCK(mpts); | |
883 | mptcp_subflow_disconnect(mpte, mpts, FALSE); | |
884 | MPTS_UNLOCK(mpts); | |
885 | } | |
886 | } | |
887 | /* | |
888 | * XXX: adi@apple.com | |
889 | * | |
890 | * Do we need to handle time wait specially here? We need to handle | |
891 | * the case where MPTCP has been established, but we have not usable | |
892 | * subflow to use. Do we want to wait a while before forcibly | |
893 | * tearing this MPTCP down, in case we have one or more subflows | |
894 | * that are flow controlled? | |
895 | */ | |
896 | ||
897 | return (mpte); | |
898 | } | |
899 | ||
900 | /* | |
901 | * User-protocol pru_peeloff callback. | |
902 | */ | |
903 | static int | |
904 | mptcp_usr_peeloff(struct socket *mp_so, associd_t aid, struct socket **psop) | |
905 | { | |
906 | struct mppcb *mpp = sotomppcb(mp_so); | |
907 | struct mptses *mpte; | |
908 | int error = 0; | |
909 | ||
910 | VERIFY(psop != NULL); | |
911 | ||
912 | if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) { | |
913 | error = EINVAL; | |
914 | goto out; | |
915 | } | |
916 | mpte = mptompte(mpp); | |
917 | VERIFY(mpte != NULL); | |
918 | ||
919 | error = mptcp_peeloff(mpte, aid, psop); | |
920 | out: | |
921 | return (error); | |
922 | } | |
923 | ||
924 | /* | |
925 | * Transform a previously connected TCP subflow connection which has | |
926 | * failed to negotiate MPTCP to its own socket which can be externalized | |
927 | * with a file descriptor. Valid only when the MPTCP socket is not | |
928 | * yet associated (MPTCP-level connection has not been established.) | |
929 | */ | |
930 | static int | |
931 | mptcp_peeloff(struct mptses *mpte, associd_t aid, struct socket **psop) | |
932 | { | |
933 | struct socket *so = NULL, *mp_so; | |
934 | struct mptsub *mpts; | |
935 | int error = 0; | |
936 | ||
937 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
938 | mp_so = mpte->mpte_mppcb->mpp_socket; | |
939 | ||
940 | VERIFY(psop != NULL); | |
941 | *psop = NULL; | |
942 | ||
943 | DTRACE_MPTCP3(peeloff, struct mptses *, mpte, associd_t, aid, | |
944 | struct socket *, mp_so); | |
945 | ||
946 | /* peeloff cannot happen after an association is established */ | |
947 | if (mpte->mpte_associd != ASSOCID_ANY) { | |
948 | error = EINVAL; | |
949 | goto out; | |
950 | } | |
951 | ||
952 | if (aid != ASSOCID_ANY && aid != ASSOCID_ALL) { | |
953 | error = EINVAL; | |
954 | goto out; | |
955 | } | |
956 | ||
957 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
958 | MPTS_LOCK(mpts); | |
959 | if (mpts->mpts_flags & MPTSF_MP_CAPABLE) { | |
960 | panic("%s: so %p is MPTCP capable but mp_so %p " | |
961 | "aid is %d\n", __func__, so, mp_so, | |
962 | mpte->mpte_associd); | |
963 | /* NOTREACHED */ | |
964 | } | |
965 | MPTS_ADDREF_LOCKED(mpts); /* for us */ | |
966 | so = mpts->mpts_socket; | |
967 | VERIFY(so != NULL); | |
968 | /* | |
969 | * This subflow socket is about to be externalized; make it | |
970 | * appear as if it has the same properties as the MPTCP socket, | |
971 | * undo what's done earlier in mptcp_subflow_add(). | |
972 | */ | |
973 | mptcp_subflow_sopeeloff(mpte, mpts, so); | |
974 | MPTS_UNLOCK(mpts); | |
975 | ||
976 | mptcp_subflow_del(mpte, mpts, FALSE); | |
977 | MPTS_REMREF(mpts); /* ours */ | |
978 | /* | |
979 | * XXX adi@apple.com | |
980 | * | |
981 | * Here we need to make sure the subflow socket is not | |
982 | * flow controlled; need to clear both INP_FLOW_CONTROLLED | |
983 | * and INP_FLOW_SUSPENDED on the subflow socket, since | |
984 | * we will no longer be monitoring its events. | |
985 | */ | |
986 | break; | |
987 | } | |
988 | ||
989 | if (so == NULL) { | |
990 | error = EINVAL; | |
991 | goto out; | |
992 | } | |
993 | *psop = so; | |
994 | ||
995 | mptcplog((LOG_DEBUG, "%s: mp_so 0x%llx\n", __func__, | |
996 | (u_int64_t)VM_KERNEL_ADDRPERM(mp_so))); | |
997 | out: | |
998 | return (error); | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * After a receive, possible send some update to peer. | |
1003 | */ | |
1004 | static int | |
1005 | mptcp_usr_rcvd(struct socket *mp_so, int flags) | |
1006 | { | |
1007 | #pragma unused(flags) | |
1008 | struct mppcb *mpp = sotomppcb(mp_so); | |
1009 | struct mptses *mpte; | |
1010 | int error = 0; | |
1011 | ||
1012 | if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) { | |
1013 | error = EINVAL; | |
1014 | goto out; | |
1015 | } | |
1016 | mpte = mptompte(mpp); | |
1017 | VERIFY(mpte != NULL); | |
1018 | ||
1019 | error = mptcp_output(mpte); | |
1020 | out: | |
1021 | return (error); | |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | * Do a send by putting data in the output queue. | |
1026 | */ | |
1027 | static int | |
1028 | mptcp_usr_send(struct socket *mp_so, int prus_flags, struct mbuf *m, | |
1029 | struct sockaddr *nam, struct mbuf *control, struct proc *p) | |
1030 | { | |
1031 | #pragma unused(nam, p) | |
1032 | struct mppcb *mpp = sotomppcb(mp_so); | |
1033 | struct mptses *mpte; | |
1034 | int error = 0; | |
1035 | ||
1036 | if (prus_flags & (PRUS_OOB|PRUS_EOF)) { | |
1037 | error = EOPNOTSUPP; | |
1038 | goto out; | |
1039 | } | |
1040 | ||
1041 | if (nam != NULL) { | |
1042 | error = EOPNOTSUPP; | |
1043 | goto out; | |
1044 | } | |
1045 | ||
1046 | if (control != NULL && control->m_len != 0) { | |
1047 | error = EOPNOTSUPP; | |
1048 | goto out; | |
1049 | } | |
1050 | ||
1051 | if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) { | |
1052 | error = ECONNRESET; | |
1053 | goto out; | |
1054 | } | |
1055 | mpte = mptompte(mpp); | |
1056 | VERIFY(mpte != NULL); | |
1057 | ||
1058 | if (!(mp_so->so_state & SS_ISCONNECTED)) { | |
1059 | error = ENOTCONN; | |
1060 | goto out; | |
1061 | } | |
1062 | ||
1063 | mptcp_insert_dsn(mpp, m); | |
1064 | VERIFY(mp_so->so_snd.sb_flags & SB_NOCOMPRESS); | |
1065 | (void) sbappendstream(&mp_so->so_snd, m); | |
1066 | m = NULL; | |
1067 | ||
1068 | if (mpte != NULL) { | |
1069 | /* | |
1070 | * XXX: adi@apple.com | |
1071 | * | |
1072 | * PRUS_MORETOCOME could be set, but we don't check it now. | |
1073 | */ | |
1074 | error = mptcp_output(mpte); | |
1075 | } | |
1076 | ||
1077 | out: | |
1078 | if (error) { | |
1079 | if (m != NULL) | |
1080 | m_freem(m); | |
1081 | if (control != NULL) | |
1082 | m_freem(control); | |
1083 | } | |
1084 | return (error); | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * Mark the MPTCP connection as being incapable of further output. | |
1089 | */ | |
1090 | static int | |
1091 | mptcp_usr_shutdown(struct socket *mp_so) | |
1092 | { | |
1093 | struct mppcb *mpp = sotomppcb(mp_so); | |
1094 | struct mptses *mpte; | |
1095 | int error = 0; | |
1096 | ||
1097 | if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) { | |
1098 | error = EINVAL; | |
1099 | goto out; | |
1100 | } | |
1101 | mpte = mptompte(mpp); | |
1102 | VERIFY(mpte != NULL); | |
1103 | ||
1104 | socantsendmore(mp_so); | |
1105 | ||
1106 | mpte = mptcp_usrclosed(mpte); | |
1107 | if (mpte != NULL) | |
1108 | error = mptcp_output(mpte); | |
1109 | out: | |
1110 | return (error); | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * Copy the contents of uio into a properly sized mbuf chain. | |
1115 | */ | |
1116 | static int | |
1117 | mptcp_uiotombuf(struct uio *uio, int how, int space, uint32_t align, | |
1118 | struct mbuf **top) | |
1119 | { | |
1120 | struct mbuf *m, *mb, *nm = NULL, *mtail = NULL; | |
1121 | user_ssize_t resid, tot, len, progress; /* must be user_ssize_t */ | |
1122 | int error; | |
1123 | ||
1124 | VERIFY(top != NULL && *top == NULL); | |
1125 | ||
1126 | /* | |
1127 | * space can be zero or an arbitrary large value bound by | |
1128 | * the total data supplied by the uio. | |
1129 | */ | |
1130 | resid = uio_resid(uio); | |
1131 | if (space > 0) | |
1132 | tot = imin(resid, space); | |
1133 | else | |
1134 | tot = resid; | |
1135 | ||
1136 | /* | |
1137 | * The smallest unit is a single mbuf with pkthdr. | |
1138 | * We can't align past it. | |
1139 | */ | |
1140 | if (align >= MHLEN) | |
1141 | return (EINVAL); | |
1142 | ||
1143 | /* | |
1144 | * Give us the full allocation or nothing. | |
1145 | * If space is zero return the smallest empty mbuf. | |
1146 | */ | |
1147 | if ((len = tot + align) == 0) | |
1148 | len = 1; | |
1149 | ||
1150 | /* Loop and append maximum sized mbufs to the chain tail. */ | |
1151 | while (len > 0) { | |
1152 | uint32_t m_needed = 1; | |
1153 | ||
1154 | if (njcl > 0 && len > MBIGCLBYTES) | |
1155 | mb = m_getpackets_internal(&m_needed, 1, | |
1156 | how, 1, M16KCLBYTES); | |
1157 | else if (len > MCLBYTES) | |
1158 | mb = m_getpackets_internal(&m_needed, 1, | |
1159 | how, 1, MBIGCLBYTES); | |
1160 | else if (len >= (signed)MINCLSIZE) | |
1161 | mb = m_getpackets_internal(&m_needed, 1, | |
1162 | how, 1, MCLBYTES); | |
1163 | else | |
1164 | mb = m_gethdr(how, MT_DATA); | |
1165 | ||
1166 | /* Fail the whole operation if one mbuf can't be allocated. */ | |
1167 | if (mb == NULL) { | |
1168 | if (nm != NULL) | |
1169 | m_freem(nm); | |
1170 | return (ENOBUFS); | |
1171 | } | |
1172 | ||
1173 | /* Book keeping. */ | |
1174 | VERIFY(mb->m_flags & M_PKTHDR); | |
1175 | len -= ((mb->m_flags & M_EXT) ? mb->m_ext.ext_size : MHLEN); | |
1176 | if (mtail != NULL) | |
1177 | mtail->m_next = mb; | |
1178 | else | |
1179 | nm = mb; | |
1180 | mtail = mb; | |
1181 | } | |
1182 | ||
1183 | m = nm; | |
1184 | m->m_data += align; | |
1185 | ||
1186 | progress = 0; | |
1187 | /* Fill all mbufs with uio data and update header information. */ | |
1188 | for (mb = m; mb != NULL; mb = mb->m_next) { | |
1189 | len = imin(M_TRAILINGSPACE(mb), tot - progress); | |
1190 | ||
1191 | error = uiomove(mtod(mb, char *), len, uio); | |
1192 | if (error != 0) { | |
1193 | m_freem(m); | |
1194 | return (error); | |
1195 | } | |
1196 | ||
1197 | /* each mbuf is M_PKTHDR chained via m_next */ | |
1198 | mb->m_len = len; | |
1199 | mb->m_pkthdr.len = len; | |
1200 | ||
1201 | progress += len; | |
1202 | } | |
1203 | VERIFY(progress == tot); | |
1204 | *top = m; | |
1205 | return (0); | |
1206 | } | |
1207 | ||
1208 | /* | |
1209 | * MPTCP socket protocol-user socket send routine, derived from sosend(). | |
1210 | */ | |
1211 | static int | |
1212 | mptcp_usr_sosend(struct socket *mp_so, struct sockaddr *addr, struct uio *uio, | |
1213 | struct mbuf *top, struct mbuf *control, int flags) | |
1214 | { | |
1215 | #pragma unused(addr) | |
1216 | int32_t space; | |
1217 | user_ssize_t resid; | |
1218 | int error, sendflags; | |
1219 | struct proc *p = current_proc(); | |
1220 | int sblocked = 0; | |
1221 | ||
1222 | /* UIO is required for now, due to per-mbuf M_PKTHDR constrains */ | |
1223 | if (uio == NULL || top != NULL) { | |
1224 | error = EINVAL; | |
1225 | goto out; | |
1226 | } | |
1227 | resid = uio_resid(uio); | |
1228 | ||
1229 | socket_lock(mp_so, 1); | |
1230 | so_update_last_owner_locked(mp_so, p); | |
1231 | so_update_policy(mp_so); | |
1232 | ||
1233 | VERIFY(mp_so->so_type == SOCK_STREAM); | |
1234 | VERIFY(!(mp_so->so_flags & SOF_MP_SUBFLOW)); | |
1235 | ||
1236 | if ((flags & (MSG_OOB|MSG_DONTROUTE|MSG_HOLD|MSG_SEND|MSG_FLUSH)) || | |
1237 | (mp_so->so_flags & SOF_ENABLE_MSGS)) { | |
1238 | error = EOPNOTSUPP; | |
1239 | socket_unlock(mp_so, 1); | |
1240 | goto out; | |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * In theory resid should be unsigned. However, space must be | |
1245 | * signed, as it might be less than 0 if we over-committed, and we | |
1246 | * must use a signed comparison of space and resid. On the other | |
1247 | * hand, a negative resid causes us to loop sending 0-length | |
1248 | * segments to the protocol. | |
1249 | */ | |
1250 | if (resid < 0 || (flags & MSG_EOR) || control != NULL) { | |
1251 | error = EINVAL; | |
1252 | socket_unlock(mp_so, 1); | |
1253 | goto out; | |
1254 | } | |
1255 | ||
1256 | OSIncrementAtomicLong(&p->p_stats->p_ru.ru_msgsnd); | |
1257 | ||
1258 | do { | |
1259 | error = sosendcheck(mp_so, NULL, resid, 0, 0, flags, | |
1260 | &sblocked, NULL); | |
1261 | if (error != 0) | |
1262 | goto release; | |
1263 | ||
1264 | space = sbspace(&mp_so->so_snd); | |
1265 | do { | |
1266 | socket_unlock(mp_so, 0); | |
1267 | /* | |
1268 | * Copy the data from userland into an mbuf chain. | |
1269 | */ | |
1270 | error = mptcp_uiotombuf(uio, M_WAITOK, space, 0, &top); | |
1271 | if (error != 0) { | |
1272 | socket_lock(mp_so, 0); | |
1273 | goto release; | |
1274 | } | |
1275 | VERIFY(top != NULL); | |
1276 | space -= resid - uio_resid(uio); | |
1277 | resid = uio_resid(uio); | |
1278 | socket_lock(mp_so, 0); | |
1279 | ||
1280 | /* | |
1281 | * Compute flags here, for pru_send and NKEs. | |
1282 | */ | |
1283 | sendflags = (resid > 0 && space > 0) ? | |
1284 | PRUS_MORETOCOME : 0; | |
1285 | ||
1286 | /* | |
1287 | * Socket filter processing | |
1288 | */ | |
1289 | VERIFY(control == NULL); | |
1290 | error = sflt_data_out(mp_so, NULL, &top, &control, 0); | |
1291 | if (error != 0) { | |
1292 | if (error == EJUSTRETURN) { | |
1293 | error = 0; | |
1294 | top = NULL; | |
1295 | /* always free control if any */ | |
1296 | } | |
1297 | goto release; | |
1298 | } | |
1299 | if (control != NULL) { | |
1300 | m_freem(control); | |
1301 | control = NULL; | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * Pass data to protocol. | |
1306 | */ | |
1307 | error = (*mp_so->so_proto->pr_usrreqs->pru_send) | |
1308 | (mp_so, sendflags, top, NULL, NULL, p); | |
1309 | ||
1310 | top = NULL; | |
1311 | if (error != 0) | |
1312 | goto release; | |
1313 | } while (resid != 0 && space > 0); | |
1314 | } while (resid != 0); | |
1315 | ||
1316 | release: | |
1317 | if (sblocked) | |
1318 | sbunlock(&mp_so->so_snd, FALSE); /* will unlock socket */ | |
1319 | else | |
1320 | socket_unlock(mp_so, 1); | |
1321 | out: | |
1322 | if (top != NULL) | |
1323 | m_freem(top); | |
1324 | if (control != NULL) | |
1325 | m_freem(control); | |
1326 | ||
1327 | return (error); | |
1328 | } | |
1329 | ||
1330 | /* | |
1331 | * Called to filter SOPT_{SET,GET} for SOL_SOCKET level socket options. | |
1332 | * This routine simply indicates to the caller whether or not to proceed | |
1333 | * further with the given socket option. This is invoked by sosetoptlock() | |
1334 | * and sogetoptlock(). | |
1335 | */ | |
1336 | static int | |
1337 | mptcp_usr_socheckopt(struct socket *mp_so, struct sockopt *sopt) | |
1338 | { | |
1339 | #pragma unused(mp_so) | |
1340 | int error = 0; | |
1341 | ||
1342 | VERIFY(sopt->sopt_level == SOL_SOCKET); | |
1343 | ||
1344 | /* | |
1345 | * We could check for sopt_dir (set/get) here, but we'll just | |
1346 | * let the caller deal with it as appropriate; therefore the | |
1347 | * following is a superset of the socket options which we | |
1348 | * allow for set/get. | |
1349 | * | |
1350 | * XXX: adi@apple.com | |
1351 | * | |
1352 | * Need to consider the following cases: | |
1353 | * | |
1354 | * a. In the event peeloff(2) occurs on the subflow socket, | |
1355 | * we may want to issue those options which are now | |
1356 | * handled at the MP socket. In that case, we will need | |
1357 | * to record them in mptcp_setopt() so that they can | |
1358 | * be replayed during peeloff. | |
1359 | * | |
1360 | * b. Certain socket options don't have a clear definition | |
1361 | * on the expected behavior post connect(2). At the time | |
1362 | * those options are issued on the MP socket, there may | |
1363 | * be existing subflow sockets that are already connected. | |
1364 | */ | |
1365 | switch (sopt->sopt_name) { | |
1366 | case SO_LINGER: /* MP */ | |
1367 | case SO_LINGER_SEC: /* MP */ | |
1368 | case SO_TYPE: /* MP */ | |
1369 | case SO_NREAD: /* MP */ | |
1370 | case SO_NWRITE: /* MP */ | |
1371 | case SO_ERROR: /* MP */ | |
1372 | case SO_SNDBUF: /* MP */ | |
1373 | case SO_RCVBUF: /* MP */ | |
1374 | case SO_SNDLOWAT: /* MP */ | |
1375 | case SO_RCVLOWAT: /* MP */ | |
1376 | case SO_SNDTIMEO: /* MP */ | |
1377 | case SO_RCVTIMEO: /* MP */ | |
1378 | case SO_NKE: /* MP */ | |
1379 | case SO_NOSIGPIPE: /* MP */ | |
1380 | case SO_NOADDRERR: /* MP */ | |
1381 | case SO_LABEL: /* MP */ | |
1382 | case SO_PEERLABEL: /* MP */ | |
1383 | case SO_DEFUNCTOK: /* MP */ | |
1384 | case SO_ISDEFUNCT: /* MP */ | |
1385 | case SO_TRAFFIC_CLASS_DBG: /* MP */ | |
1386 | /* | |
1387 | * Tell the caller that these options are to be processed. | |
1388 | */ | |
1389 | break; | |
1390 | ||
1391 | case SO_DEBUG: /* MP + subflow */ | |
1392 | case SO_KEEPALIVE: /* MP + subflow */ | |
1393 | case SO_USELOOPBACK: /* MP + subflow */ | |
1394 | case SO_RANDOMPORT: /* MP + subflow */ | |
1395 | case SO_TRAFFIC_CLASS: /* MP + subflow */ | |
1396 | case SO_RECV_TRAFFIC_CLASS: /* MP + subflow */ | |
1397 | case SO_PRIVILEGED_TRAFFIC_CLASS: /* MP + subflow */ | |
1398 | case SO_RECV_ANYIF: /* MP + subflow */ | |
1399 | case SO_RESTRICTIONS: /* MP + subflow */ | |
1400 | case SO_FLUSH: /* MP + subflow */ | |
1401 | /* | |
1402 | * Tell the caller that these options are to be processed; | |
1403 | * these will also be recorded later by mptcp_setopt(). | |
1404 | * | |
1405 | * NOTE: Only support integer option value for now. | |
1406 | */ | |
1407 | if (sopt->sopt_valsize != sizeof (int)) | |
1408 | error = EINVAL; | |
1409 | break; | |
1410 | ||
1411 | default: | |
1412 | /* | |
1413 | * Tell the caller to stop immediately and return an error. | |
1414 | */ | |
1415 | error = ENOPROTOOPT; | |
1416 | break; | |
1417 | } | |
1418 | ||
1419 | return (error); | |
1420 | } | |
1421 | ||
1422 | /* | |
1423 | * Issue SOPT_SET for all MPTCP subflows (for integer option values.) | |
1424 | */ | |
1425 | static int | |
1426 | mptcp_setopt_apply(struct mptses *mpte, struct mptopt *mpo) | |
1427 | { | |
1428 | struct socket *mp_so; | |
1429 | struct mptsub *mpts; | |
1430 | struct mptopt smpo; | |
1431 | int error = 0; | |
1432 | ||
1433 | /* just bail now if this isn't applicable to subflow sockets */ | |
1434 | if (!(mpo->mpo_flags & MPOF_SUBFLOW_OK)) { | |
1435 | error = ENOPROTOOPT; | |
1436 | goto out; | |
1437 | } | |
1438 | ||
1439 | /* | |
1440 | * Skip those that are handled internally; these options | |
1441 | * should not have been recorded and marked with the | |
1442 | * MPOF_SUBFLOW_OK by mptcp_setopt(), but just in case. | |
1443 | */ | |
1444 | if (mpo->mpo_level == SOL_SOCKET && | |
1445 | (mpo->mpo_name == SO_NOSIGPIPE || mpo->mpo_name == SO_NOADDRERR)) { | |
1446 | error = ENOPROTOOPT; | |
1447 | goto out; | |
1448 | } | |
1449 | ||
1450 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
1451 | mp_so = mpte->mpte_mppcb->mpp_socket; | |
1452 | ||
1453 | /* | |
1454 | * Don't bother going further if there's no subflow; mark the option | |
1455 | * with MPOF_INTERIM so that we know whether or not to remove this | |
1456 | * option upon encountering an error while issuing it during subflow | |
1457 | * socket creation. | |
1458 | */ | |
1459 | if (mpte->mpte_numflows == 0) { | |
1460 | VERIFY(TAILQ_EMPTY(&mpte->mpte_subflows)); | |
1461 | mpo->mpo_flags |= MPOF_INTERIM; | |
1462 | /* return success */ | |
1463 | goto out; | |
1464 | } | |
1465 | ||
1466 | bzero(&smpo, sizeof (smpo)); | |
1467 | smpo.mpo_flags |= MPOF_SUBFLOW_OK; | |
1468 | smpo.mpo_level = mpo->mpo_level; | |
1469 | smpo.mpo_name = mpo->mpo_name; | |
1470 | ||
1471 | /* grab exisiting values in case we need to rollback */ | |
1472 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
1473 | struct socket *so; | |
1474 | ||
1475 | MPTS_LOCK(mpts); | |
1476 | mpts->mpts_flags &= ~(MPTSF_SOPT_OLDVAL|MPTSF_SOPT_INPROG); | |
1477 | mpts->mpts_oldintval = 0; | |
1478 | smpo.mpo_intval = 0; | |
1479 | VERIFY(mpts->mpts_socket != NULL); | |
1480 | so = mpts->mpts_socket; | |
1481 | socket_lock(so, 0); | |
1482 | if (mptcp_subflow_sogetopt(mpte, so, &smpo) == 0) { | |
1483 | mpts->mpts_flags |= MPTSF_SOPT_OLDVAL; | |
1484 | mpts->mpts_oldintval = smpo.mpo_intval; | |
1485 | } | |
1486 | socket_unlock(so, 0); | |
1487 | MPTS_UNLOCK(mpts); | |
1488 | } | |
1489 | ||
1490 | /* apply socket option */ | |
1491 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
1492 | struct socket *so; | |
1493 | ||
1494 | MPTS_LOCK(mpts); | |
1495 | mpts->mpts_flags |= MPTSF_SOPT_INPROG; | |
1496 | VERIFY(mpts->mpts_socket != NULL); | |
1497 | so = mpts->mpts_socket; | |
1498 | socket_lock(so, 0); | |
1499 | error = mptcp_subflow_sosetopt(mpte, so, mpo); | |
1500 | socket_unlock(so, 0); | |
1501 | MPTS_UNLOCK(mpts); | |
1502 | if (error != 0) | |
1503 | break; | |
1504 | } | |
1505 | ||
1506 | /* cleanup, and rollback if needed */ | |
1507 | TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) { | |
1508 | struct socket *so; | |
1509 | ||
1510 | MPTS_LOCK(mpts); | |
1511 | if (!(mpts->mpts_flags & MPTSF_SOPT_INPROG)) { | |
1512 | /* clear in case it's set */ | |
1513 | mpts->mpts_flags &= ~MPTSF_SOPT_OLDVAL; | |
1514 | mpts->mpts_oldintval = 0; | |
1515 | MPTS_UNLOCK(mpts); | |
1516 | continue; | |
1517 | } | |
1518 | if (!(mpts->mpts_flags & MPTSF_SOPT_OLDVAL)) { | |
1519 | mpts->mpts_flags &= ~MPTSF_SOPT_INPROG; | |
1520 | VERIFY(mpts->mpts_oldintval == 0); | |
1521 | MPTS_UNLOCK(mpts); | |
1522 | continue; | |
1523 | } | |
1524 | /* error during sosetopt, so roll it back */ | |
1525 | if (error != 0) { | |
1526 | VERIFY(mpts->mpts_socket != NULL); | |
1527 | so = mpts->mpts_socket; | |
1528 | socket_lock(so, 0); | |
1529 | smpo.mpo_intval = mpts->mpts_oldintval; | |
1530 | (void) mptcp_subflow_sosetopt(mpte, so, &smpo); | |
1531 | socket_unlock(so, 0); | |
1532 | } | |
1533 | mpts->mpts_oldintval = 0; | |
1534 | mpts->mpts_flags &= ~(MPTSF_SOPT_OLDVAL|MPTSF_SOPT_INPROG); | |
1535 | MPTS_UNLOCK(mpts); | |
1536 | } | |
1537 | ||
1538 | out: | |
1539 | return (error); | |
1540 | } | |
1541 | ||
1542 | /* | |
1543 | * Handle SOPT_SET for socket options issued on MP socket. | |
1544 | */ | |
1545 | static int | |
1546 | mptcp_setopt(struct mptses *mpte, struct sockopt *sopt) | |
1547 | { | |
1548 | int error = 0, optval, level, optname, rec = 1; | |
1549 | struct mptopt smpo, *mpo = NULL; | |
1550 | struct socket *mp_so; | |
1551 | char buf[32]; | |
1552 | ||
1553 | level = sopt->sopt_level; | |
1554 | optname = sopt->sopt_name; | |
1555 | ||
1556 | VERIFY(sopt->sopt_dir == SOPT_SET); | |
1557 | VERIFY(level == SOL_SOCKET || level == IPPROTO_TCP); | |
1558 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
1559 | mp_so = mpte->mpte_mppcb->mpp_socket; | |
1560 | ||
1561 | /* | |
1562 | * Record socket options which are applicable to subflow sockets so | |
1563 | * that we can replay them for new ones; see mptcp_usr_socheckopt() | |
1564 | * for the list of eligible socket-level options. | |
1565 | */ | |
1566 | if (level == SOL_SOCKET) { | |
1567 | switch (optname) { | |
1568 | case SO_DEBUG: | |
1569 | case SO_KEEPALIVE: | |
1570 | case SO_USELOOPBACK: | |
1571 | case SO_RANDOMPORT: | |
1572 | case SO_TRAFFIC_CLASS: | |
1573 | case SO_RECV_TRAFFIC_CLASS: | |
1574 | case SO_PRIVILEGED_TRAFFIC_CLASS: | |
1575 | case SO_RECV_ANYIF: | |
1576 | case SO_RESTRICTIONS: | |
1577 | /* record it */ | |
1578 | break; | |
1579 | case SO_FLUSH: | |
1580 | /* don't record it */ | |
1581 | rec = 0; | |
1582 | break; | |
1583 | default: | |
1584 | /* nothing to do; just return success */ | |
1585 | goto out; | |
1586 | } | |
1587 | } else { | |
1588 | switch (optname) { | |
1589 | case TCP_NODELAY: | |
1590 | case TCP_RXT_FINDROP: | |
1591 | case TCP_KEEPALIVE: | |
1592 | case TCP_KEEPINTVL: | |
1593 | case TCP_KEEPCNT: | |
1594 | case TCP_CONNECTIONTIMEOUT: | |
1595 | case TCP_RXT_CONNDROPTIME: | |
1596 | case PERSIST_TIMEOUT: | |
1597 | /* eligible; record it */ | |
1598 | break; | |
1599 | default: | |
1600 | /* not eligible */ | |
1601 | error = ENOPROTOOPT; | |
1602 | goto out; | |
1603 | } | |
1604 | } | |
1605 | ||
1606 | if ((error = sooptcopyin(sopt, &optval, sizeof (optval), | |
1607 | sizeof (optval))) != 0) | |
1608 | goto out; | |
1609 | ||
1610 | if (rec) { | |
1611 | /* search for an existing one; if not found, allocate */ | |
1612 | if ((mpo = mptcp_sopt_find(mpte, sopt)) == NULL) | |
1613 | mpo = mptcp_sopt_alloc(M_WAITOK); | |
1614 | ||
1615 | if (mpo == NULL) { | |
1616 | error = ENOBUFS; | |
1617 | } else { | |
1618 | mptcplog((LOG_DEBUG, "%s: mp_so 0x%llx sopt %s " | |
1619 | "val %d %s\n", __func__, | |
1620 | (u_int64_t)VM_KERNEL_ADDRPERM(mp_so), | |
1621 | mptcp_sopt2str(level, optname, buf, | |
1622 | sizeof (buf)), optval, | |
1623 | (mpo->mpo_flags & MPOF_ATTACHED) ? | |
1624 | "updated" : "recorded")); | |
1625 | ||
1626 | /* initialize or update, as needed */ | |
1627 | mpo->mpo_intval = optval; | |
1628 | if (!(mpo->mpo_flags & MPOF_ATTACHED)) { | |
1629 | mpo->mpo_level = level; | |
1630 | mpo->mpo_name = optname; | |
1631 | mptcp_sopt_insert(mpte, mpo); | |
1632 | } | |
1633 | VERIFY(mpo->mpo_flags & MPOF_ATTACHED); | |
1634 | /* this can be issued on the subflow socket */ | |
1635 | mpo->mpo_flags |= MPOF_SUBFLOW_OK; | |
1636 | } | |
1637 | } else { | |
1638 | bzero(&smpo, sizeof (smpo)); | |
1639 | mpo = &smpo; | |
1640 | mpo->mpo_flags |= MPOF_SUBFLOW_OK; | |
1641 | mpo->mpo_level = level; | |
1642 | mpo->mpo_name = optname; | |
1643 | mpo->mpo_intval = optval; | |
1644 | } | |
1645 | VERIFY(mpo == NULL || error == 0); | |
1646 | ||
1647 | /* issue this socket option on existing subflows */ | |
1648 | if (error == 0) { | |
1649 | error = mptcp_setopt_apply(mpte, mpo); | |
1650 | if (error != 0 && (mpo->mpo_flags & MPOF_ATTACHED)) { | |
1651 | VERIFY(mpo != &smpo); | |
1652 | mptcp_sopt_remove(mpte, mpo); | |
1653 | mptcp_sopt_free(mpo); | |
1654 | } | |
1655 | if (mpo == &smpo) | |
1656 | mpo->mpo_flags &= ~MPOF_INTERIM; | |
1657 | } | |
1658 | out: | |
1659 | if (error == 0 && mpo != NULL) { | |
1660 | mptcplog((LOG_ERR, "%s: mp_so 0x%llx sopt %s val %d set %s\n", | |
1661 | __func__, (u_int64_t)VM_KERNEL_ADDRPERM(mp_so), | |
1662 | mptcp_sopt2str(level, optname, buf, | |
1663 | sizeof (buf)), optval, (mpo->mpo_flags & MPOF_INTERIM) ? | |
1664 | "pending" : "successful")); | |
1665 | } else if (error != 0) { | |
1666 | mptcplog((LOG_ERR, "%s: mp_so 0x%llx sopt %s can't be issued " | |
1667 | "error %d\n", __func__, | |
1668 | (u_int64_t)VM_KERNEL_ADDRPERM(mp_so), mptcp_sopt2str(level, | |
1669 | optname, buf, sizeof (buf)), error)); | |
1670 | } | |
1671 | return (error); | |
1672 | } | |
1673 | ||
1674 | /* | |
1675 | * Handle SOPT_GET for socket options issued on MP socket. | |
1676 | */ | |
1677 | static int | |
1678 | mptcp_getopt(struct mptses *mpte, struct sockopt *sopt) | |
1679 | { | |
1680 | int error = 0, optval; | |
1681 | ||
1682 | VERIFY(sopt->sopt_dir == SOPT_GET); | |
1683 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
1684 | ||
1685 | /* | |
1686 | * We only handle SOPT_GET for TCP level socket options; we should | |
1687 | * not get here for socket level options since they are already | |
1688 | * handled at the socket layer. | |
1689 | */ | |
1690 | if (sopt->sopt_level != IPPROTO_TCP) { | |
1691 | error = ENOPROTOOPT; | |
1692 | goto out; | |
1693 | } | |
1694 | ||
1695 | switch (sopt->sopt_name) { | |
1696 | case TCP_NODELAY: | |
1697 | case TCP_RXT_FINDROP: | |
1698 | case TCP_KEEPALIVE: | |
1699 | case TCP_KEEPINTVL: | |
1700 | case TCP_KEEPCNT: | |
1701 | case TCP_CONNECTIONTIMEOUT: | |
1702 | case TCP_RXT_CONNDROPTIME: | |
1703 | case PERSIST_TIMEOUT: | |
1704 | /* eligible; get the default value just in case */ | |
1705 | error = mptcp_default_tcp_optval(mpte, sopt, &optval); | |
1706 | break; | |
1707 | default: | |
1708 | /* not eligible */ | |
1709 | error = ENOPROTOOPT; | |
1710 | break; | |
1711 | } | |
1712 | ||
1713 | /* | |
1714 | * Search for a previously-issued TCP level socket option and | |
1715 | * return the recorded option value. This assumes that the | |
1716 | * value did not get modified by the lower layer after it was | |
1717 | * issued at setsockopt(2) time. If not found, we'll return | |
1718 | * the default value obtained ealier. | |
1719 | */ | |
1720 | if (error == 0) { | |
1721 | struct mptopt *mpo; | |
1722 | ||
1723 | if ((mpo = mptcp_sopt_find(mpte, sopt)) != NULL) | |
1724 | optval = mpo->mpo_intval; | |
1725 | ||
1726 | error = sooptcopyout(sopt, &optval, sizeof (int)); | |
1727 | } | |
1728 | out: | |
1729 | return (error); | |
1730 | } | |
1731 | ||
1732 | /* | |
1733 | * Return default values for TCP socket options. Ideally we would query the | |
1734 | * subflow TCP socket, but that requires creating a subflow socket before | |
1735 | * connectx(2) time. To simplify things, just return the default values | |
1736 | * that we know of. | |
1737 | */ | |
1738 | static int | |
1739 | mptcp_default_tcp_optval(struct mptses *mpte, struct sockopt *sopt, int *optval) | |
1740 | { | |
1741 | int error = 0; | |
1742 | ||
1743 | VERIFY(sopt->sopt_level == IPPROTO_TCP); | |
1744 | VERIFY(sopt->sopt_dir == SOPT_GET); | |
1745 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
1746 | ||
1747 | /* try to do what tcp_newtcpcb() does */ | |
1748 | switch (sopt->sopt_name) { | |
1749 | case TCP_NODELAY: | |
1750 | case TCP_RXT_FINDROP: | |
1751 | case TCP_KEEPINTVL: | |
1752 | case TCP_KEEPCNT: | |
1753 | case TCP_CONNECTIONTIMEOUT: | |
1754 | case TCP_RXT_CONNDROPTIME: | |
1755 | *optval = 0; | |
1756 | break; | |
1757 | ||
1758 | case TCP_KEEPALIVE: | |
1759 | *optval = mptcp_subflow_keeptime; | |
1760 | break; | |
1761 | ||
1762 | case PERSIST_TIMEOUT: | |
1763 | *optval = tcp_max_persist_timeout; | |
1764 | break; | |
1765 | ||
1766 | default: | |
1767 | error = ENOPROTOOPT; | |
1768 | break; | |
1769 | } | |
1770 | return (error); | |
1771 | } | |
1772 | ||
1773 | /* | |
1774 | * MPTCP SOPT_{SET,GET} socket option handler, for options issued on the MP | |
1775 | * socket, at SOL_SOCKET and IPPROTO_TCP levels. The former is restricted | |
1776 | * to those that are allowed by mptcp_usr_socheckopt(). | |
1777 | */ | |
1778 | int | |
1779 | mptcp_ctloutput(struct socket *mp_so, struct sockopt *sopt) | |
1780 | { | |
1781 | struct mppcb *mpp = sotomppcb(mp_so); | |
1782 | struct mptses *mpte; | |
1783 | int error = 0; | |
1784 | ||
1785 | if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) { | |
1786 | error = EINVAL; | |
1787 | goto out; | |
1788 | } | |
1789 | mpte = mptompte(mpp); | |
1790 | MPTE_LOCK_ASSERT_HELD(mpte); /* same as MP socket lock */ | |
1791 | ||
1792 | /* we only handle socket and TCP-level socket options for MPTCP */ | |
1793 | if (sopt->sopt_level != SOL_SOCKET && sopt->sopt_level != IPPROTO_TCP) { | |
1794 | char buf[32]; | |
1795 | mptcplog((LOG_DEBUG, "%s: mp_so 0x%llx sopt %s level not " | |
1796 | "handled\n", __func__, (u_int64_t)VM_KERNEL_ADDRPERM(mp_so), | |
1797 | mptcp_sopt2str(sopt->sopt_level, | |
1798 | sopt->sopt_name, buf, sizeof (buf)))); | |
1799 | error = EINVAL; | |
1800 | goto out; | |
1801 | } | |
1802 | ||
1803 | switch (sopt->sopt_dir) { | |
1804 | case SOPT_SET: | |
1805 | error = mptcp_setopt(mpte, sopt); | |
1806 | break; | |
1807 | ||
1808 | case SOPT_GET: | |
1809 | error = mptcp_getopt(mpte, sopt); | |
1810 | break; | |
1811 | } | |
1812 | out: | |
1813 | return (error); | |
1814 | } | |
1815 | ||
1816 | /* | |
1817 | * Return a string representation of <sopt_level,sopt_name> | |
1818 | */ | |
1819 | const char * | |
1820 | mptcp_sopt2str(int level, int optname, char *dst, int size) | |
1821 | { | |
1822 | char lbuf[32], obuf[32]; | |
1823 | const char *l = lbuf, *o = obuf; | |
1824 | ||
1825 | (void) snprintf(lbuf, sizeof (lbuf), "0x%x", level); | |
1826 | (void) snprintf(obuf, sizeof (obuf), "0x%x", optname); | |
1827 | ||
1828 | switch (level) { | |
1829 | case SOL_SOCKET: | |
1830 | l = "SOL_SOCKET"; | |
1831 | switch (optname) { | |
1832 | case SO_LINGER: | |
1833 | o = "SO_LINGER"; | |
1834 | break; | |
1835 | case SO_LINGER_SEC: | |
1836 | o = "SO_LINGER_SEC"; | |
1837 | break; | |
1838 | case SO_DEBUG: | |
1839 | o = "SO_DEBUG"; | |
1840 | break; | |
1841 | case SO_KEEPALIVE: | |
1842 | o = "SO_KEEPALIVE"; | |
1843 | break; | |
1844 | case SO_USELOOPBACK: | |
1845 | o = "SO_USELOOPBACK"; | |
1846 | break; | |
1847 | case SO_TYPE: | |
1848 | o = "SO_TYPE"; | |
1849 | break; | |
1850 | case SO_NREAD: | |
1851 | o = "SO_NREAD"; | |
1852 | break; | |
1853 | case SO_NWRITE: | |
1854 | o = "SO_NWRITE"; | |
1855 | break; | |
1856 | case SO_ERROR: | |
1857 | o = "SO_ERROR"; | |
1858 | break; | |
1859 | case SO_SNDBUF: | |
1860 | o = "SO_SNDBUF"; | |
1861 | break; | |
1862 | case SO_RCVBUF: | |
1863 | o = "SO_RCVBUF"; | |
1864 | break; | |
1865 | case SO_SNDLOWAT: | |
1866 | o = "SO_SNDLOWAT"; | |
1867 | break; | |
1868 | case SO_RCVLOWAT: | |
1869 | o = "SO_RCVLOWAT"; | |
1870 | break; | |
1871 | case SO_SNDTIMEO: | |
1872 | o = "SO_SNDTIMEO"; | |
1873 | break; | |
1874 | case SO_RCVTIMEO: | |
1875 | o = "SO_RCVTIMEO"; | |
1876 | break; | |
1877 | case SO_NKE: | |
1878 | o = "SO_NKE"; | |
1879 | break; | |
1880 | case SO_NOSIGPIPE: | |
1881 | o = "SO_NOSIGPIPE"; | |
1882 | break; | |
1883 | case SO_NOADDRERR: | |
1884 | o = "SO_NOADDRERR"; | |
1885 | break; | |
1886 | case SO_RESTRICTIONS: | |
1887 | o = "SO_RESTRICTIONS"; | |
1888 | break; | |
1889 | case SO_LABEL: | |
1890 | o = "SO_LABEL"; | |
1891 | break; | |
1892 | case SO_PEERLABEL: | |
1893 | o = "SO_PEERLABEL"; | |
1894 | break; | |
1895 | case SO_RANDOMPORT: | |
1896 | o = "SO_RANDOMPORT"; | |
1897 | break; | |
1898 | case SO_TRAFFIC_CLASS: | |
1899 | o = "SO_TRAFFIC_CLASS"; | |
1900 | break; | |
1901 | case SO_RECV_TRAFFIC_CLASS: | |
1902 | o = "SO_RECV_TRAFFIC_CLASS"; | |
1903 | break; | |
1904 | case SO_TRAFFIC_CLASS_DBG: | |
1905 | o = "SO_TRAFFIC_CLASS_DBG"; | |
1906 | break; | |
1907 | case SO_PRIVILEGED_TRAFFIC_CLASS: | |
1908 | o = "SO_PRIVILEGED_TRAFFIC_CLASS"; | |
1909 | break; | |
1910 | case SO_DEFUNCTOK: | |
1911 | o = "SO_DEFUNCTOK"; | |
1912 | break; | |
1913 | case SO_ISDEFUNCT: | |
1914 | o = "SO_ISDEFUNCT"; | |
1915 | break; | |
1916 | case SO_OPPORTUNISTIC: | |
1917 | o = "SO_OPPORTUNISTIC"; | |
1918 | break; | |
1919 | case SO_FLUSH: | |
1920 | o = "SO_FLUSH"; | |
1921 | break; | |
1922 | case SO_RECV_ANYIF: | |
1923 | o = "SO_RECV_ANYIF"; | |
1924 | break; | |
1925 | } | |
1926 | break; | |
1927 | case IPPROTO_TCP: | |
1928 | l = "IPPROTO_TCP"; | |
1929 | switch (optname) { | |
1930 | case TCP_KEEPALIVE: | |
1931 | o = "TCP_KEEPALIVE"; | |
1932 | break; | |
1933 | case TCP_KEEPINTVL: | |
1934 | o = "TCP_KEEPINTVL"; | |
1935 | break; | |
1936 | case TCP_KEEPCNT: | |
1937 | o = "TCP_KEEPCNT"; | |
1938 | break; | |
1939 | case TCP_CONNECTIONTIMEOUT: | |
1940 | o = "TCP_CONNECTIONTIMEOUT"; | |
1941 | break; | |
1942 | case TCP_RXT_CONNDROPTIME: | |
1943 | o = "TCP_RXT_CONNDROPTIME"; | |
1944 | break; | |
1945 | case PERSIST_TIMEOUT: | |
1946 | o = "PERSIST_TIMEOUT"; | |
1947 | break; | |
1948 | } | |
1949 | break; | |
1950 | } | |
1951 | ||
1952 | (void) snprintf(dst, size, "<%s,%s>", l, o); | |
1953 | return (dst); | |
1954 | } |