/src/usrsctp/usrsctplib/netinet6/sctp6_usrreq.c
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1 | | /*- |
2 | | * SPDX-License-Identifier: BSD-3-Clause |
3 | | * |
4 | | * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. |
5 | | * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. |
6 | | * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. |
7 | | * |
8 | | * Redistribution and use in source and binary forms, with or without |
9 | | * modification, are permitted provided that the following conditions are met: |
10 | | * |
11 | | * a) Redistributions of source code must retain the above copyright notice, |
12 | | * this list of conditions and the following disclaimer. |
13 | | * |
14 | | * b) Redistributions in binary form must reproduce the above copyright |
15 | | * notice, this list of conditions and the following disclaimer in |
16 | | * the documentation and/or other materials provided with the distribution. |
17 | | * |
18 | | * c) Neither the name of Cisco Systems, Inc. nor the names of its |
19 | | * contributors may be used to endorse or promote products derived |
20 | | * from this software without specific prior written permission. |
21 | | * |
22 | | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
23 | | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
24 | | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
26 | | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
27 | | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
28 | | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
29 | | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
30 | | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
31 | | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
32 | | * THE POSSIBILITY OF SUCH DAMAGE. |
33 | | */ |
34 | | |
35 | | #include <netinet/sctp_os.h> |
36 | | #ifdef INET6 |
37 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
38 | | #include <sys/proc.h> |
39 | | #endif |
40 | | #include <netinet/sctp_pcb.h> |
41 | | #include <netinet/sctp_header.h> |
42 | | #include <netinet/sctp_var.h> |
43 | | #include <netinet6/sctp6_var.h> |
44 | | #include <netinet/sctp_sysctl.h> |
45 | | #include <netinet/sctp_output.h> |
46 | | #include <netinet/sctp_uio.h> |
47 | | #include <netinet/sctp_asconf.h> |
48 | | #include <netinet/sctputil.h> |
49 | | #include <netinet/sctp_indata.h> |
50 | | #include <netinet/sctp_timer.h> |
51 | | #include <netinet/sctp_auth.h> |
52 | | #include <netinet/sctp_input.h> |
53 | | #include <netinet/sctp_output.h> |
54 | | #include <netinet/sctp_bsd_addr.h> |
55 | | #include <netinet/sctp_crc32.h> |
56 | | #if !defined(_WIN32) |
57 | | #include <netinet/icmp6.h> |
58 | | #include <netinet/udp.h> |
59 | | #endif |
60 | | #if defined(__Userspace__) |
61 | | int ip6_v6only=0; |
62 | | #endif |
63 | | #if defined(__Userspace__) |
64 | | #ifdef INET |
65 | | void |
66 | | in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) |
67 | 0 | { |
68 | | #if defined(_WIN32) |
69 | | uint32_t temp; |
70 | | #endif |
71 | 0 | memset(sin, 0, sizeof(*sin)); |
72 | | #ifdef HAVE_SIN_LEN |
73 | | sin->sin_len = sizeof(struct sockaddr_in); |
74 | | #endif |
75 | 0 | sin->sin_family = AF_INET; |
76 | 0 | sin->sin_port = sin6->sin6_port; |
77 | | #if defined(_WIN32) |
78 | | temp = sin6->sin6_addr.s6_addr16[7]; |
79 | | temp = temp << 16; |
80 | | temp = temp | sin6->sin6_addr.s6_addr16[6]; |
81 | | sin->sin_addr.s_addr = temp; |
82 | | #else |
83 | 0 | sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; |
84 | 0 | #endif |
85 | 0 | } |
86 | | |
87 | | void |
88 | | in6_sin6_2_sin_in_sock(struct sockaddr *nam) |
89 | 0 | { |
90 | 0 | struct sockaddr_in *sin_p; |
91 | 0 | struct sockaddr_in6 sin6; |
92 | | |
93 | | /* save original sockaddr_in6 addr and convert it to sockaddr_in */ |
94 | 0 | sin6 = *(struct sockaddr_in6 *)nam; |
95 | 0 | sin_p = (struct sockaddr_in *)nam; |
96 | 0 | in6_sin6_2_sin(sin_p, &sin6); |
97 | 0 | } |
98 | | |
99 | | void |
100 | | in6_sin_2_v4mapsin6(const struct sockaddr_in *sin, struct sockaddr_in6 *sin6) |
101 | 0 | { |
102 | 0 | memset(sin6, 0, sizeof(struct sockaddr_in6)); |
103 | 0 | sin6->sin6_family = AF_INET6; |
104 | | #ifdef HAVE_SIN6_LEN |
105 | | sin6->sin6_len = sizeof(struct sockaddr_in6); |
106 | | #endif |
107 | 0 | sin6->sin6_port = sin->sin_port; |
108 | | #if defined(_WIN32) |
109 | | ((uint32_t *)&sin6->sin6_addr)[0] = 0; |
110 | | ((uint32_t *)&sin6->sin6_addr)[1] = 0; |
111 | | ((uint32_t *)&sin6->sin6_addr)[2] = htonl(0xffff); |
112 | | ((uint32_t *)&sin6->sin6_addr)[3] = sin->sin_addr.s_addr; |
113 | | #else |
114 | 0 | sin6->sin6_addr.s6_addr32[0] = 0; |
115 | 0 | sin6->sin6_addr.s6_addr32[1] = 0; |
116 | 0 | sin6->sin6_addr.s6_addr32[2] = htonl(0xffff); |
117 | 0 | sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; |
118 | 0 | #endif |
119 | 0 | } |
120 | | #endif |
121 | | #endif |
122 | | |
123 | | #if !defined(__Userspace__) |
124 | | int |
125 | | #if defined(__APPLE__) || defined(__FreeBSD__) |
126 | | sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) |
127 | | #else |
128 | | sctp6_input(struct mbuf **i_pak, int *offp, int proto) |
129 | | #endif |
130 | | { |
131 | | struct mbuf *m; |
132 | | int iphlen; |
133 | | uint32_t vrf_id; |
134 | | uint8_t ecn_bits; |
135 | | struct sockaddr_in6 src, dst; |
136 | | struct ip6_hdr *ip6; |
137 | | struct sctphdr *sh; |
138 | | struct sctp_chunkhdr *ch; |
139 | | int length, offset; |
140 | | uint8_t compute_crc; |
141 | | #if defined(__FreeBSD__) |
142 | | uint32_t mflowid; |
143 | | uint8_t mflowtype; |
144 | | uint16_t fibnum; |
145 | | #endif |
146 | | #if !(defined(__APPLE__) || defined(__FreeBSD__)) |
147 | | uint16_t port = 0; |
148 | | #endif |
149 | | |
150 | | iphlen = *offp; |
151 | | if (SCTP_GET_PKT_VRFID(*i_pak, vrf_id)) { |
152 | | SCTP_RELEASE_PKT(*i_pak); |
153 | | return (IPPROTO_DONE); |
154 | | } |
155 | | m = SCTP_HEADER_TO_CHAIN(*i_pak); |
156 | | #ifdef SCTP_MBUF_LOGGING |
157 | | /* Log in any input mbufs */ |
158 | | if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { |
159 | | sctp_log_mbc(m, SCTP_MBUF_INPUT); |
160 | | } |
161 | | #endif |
162 | | #ifdef SCTP_PACKET_LOGGING |
163 | | if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { |
164 | | sctp_packet_log(m); |
165 | | } |
166 | | #endif |
167 | | #if defined(__FreeBSD__) |
168 | | SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, |
169 | | "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%b.\n", |
170 | | m->m_pkthdr.len, |
171 | | if_name(m->m_pkthdr.rcvif), |
172 | | (int)m->m_pkthdr.csum_flags, CSUM_BITS); |
173 | | #endif |
174 | | #if defined(__APPLE__) |
175 | | SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, |
176 | | "sctp6_input(): Packet of length %d received on %s%d with csum_flags 0x%x.\n", |
177 | | m->m_pkthdr.len, |
178 | | m->m_pkthdr.rcvif->if_name, |
179 | | m->m_pkthdr.rcvif->if_unit, |
180 | | m->m_pkthdr.csum_flags); |
181 | | #endif |
182 | | #if defined(_WIN32) && !defined(__Userspace__) |
183 | | SCTPDBG(SCTP_DEBUG_CRCOFFLOAD, |
184 | | "sctp6_input(): Packet of length %d received on %s with csum_flags 0x%x.\n", |
185 | | m->m_pkthdr.len, |
186 | | m->m_pkthdr.rcvif->if_xname, |
187 | | m->m_pkthdr.csum_flags); |
188 | | #endif |
189 | | #if defined(__FreeBSD__) |
190 | | mflowid = m->m_pkthdr.flowid; |
191 | | mflowtype = M_HASHTYPE_GET(m); |
192 | | fibnum = M_GETFIB(m); |
193 | | #endif |
194 | | SCTP_STAT_INCR(sctps_recvpackets); |
195 | | SCTP_STAT_INCR_COUNTER64(sctps_inpackets); |
196 | | /* Get IP, SCTP, and first chunk header together in the first mbuf. */ |
197 | | offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); |
198 | | if (m->m_len < offset) { |
199 | | m = m_pullup(m, offset); |
200 | | if (m == NULL) { |
201 | | SCTP_STAT_INCR(sctps_hdrops); |
202 | | return (IPPROTO_DONE); |
203 | | } |
204 | | } |
205 | | ip6 = mtod(m, struct ip6_hdr *); |
206 | | sh = (struct sctphdr *)(mtod(m, caddr_t) + iphlen); |
207 | | ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr)); |
208 | | offset -= sizeof(struct sctp_chunkhdr); |
209 | | memset(&src, 0, sizeof(struct sockaddr_in6)); |
210 | | src.sin6_family = AF_INET6; |
211 | | #ifdef HAVE_SIN6_LEN |
212 | | src.sin6_len = sizeof(struct sockaddr_in6); |
213 | | #endif |
214 | | src.sin6_port = sh->src_port; |
215 | | src.sin6_addr = ip6->ip6_src; |
216 | | #if defined(__FreeBSD__) |
217 | | #if defined(__APPLE__) |
218 | | /* XXX: This code should also be used on Apple */ |
219 | | #endif |
220 | | if (in6_setscope(&src.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { |
221 | | goto out; |
222 | | } |
223 | | #endif |
224 | | memset(&dst, 0, sizeof(struct sockaddr_in6)); |
225 | | dst.sin6_family = AF_INET6; |
226 | | #ifdef HAVE_SIN6_LEN |
227 | | dst.sin6_len = sizeof(struct sockaddr_in6); |
228 | | #endif |
229 | | dst.sin6_port = sh->dest_port; |
230 | | dst.sin6_addr = ip6->ip6_dst; |
231 | | #if defined(__FreeBSD__) |
232 | | #if defined(__APPLE__) |
233 | | /* XXX: This code should also be used on Apple */ |
234 | | #endif |
235 | | if (in6_setscope(&dst.sin6_addr, m->m_pkthdr.rcvif, NULL) != 0) { |
236 | | goto out; |
237 | | } |
238 | | #endif |
239 | | #if defined(__APPLE__) |
240 | | #if defined(NFAITH) && 0 < NFAITH |
241 | | if (faithprefix(&dst.sin6_addr)) { |
242 | | goto out; |
243 | | } |
244 | | #endif |
245 | | #endif |
246 | | length = ntohs(ip6->ip6_plen) + iphlen; |
247 | | /* Validate mbuf chain length with IP payload length. */ |
248 | | if (SCTP_HEADER_LEN(m) != length) { |
249 | | SCTPDBG(SCTP_DEBUG_INPUT1, |
250 | | "sctp6_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m)); |
251 | | SCTP_STAT_INCR(sctps_hdrops); |
252 | | goto out; |
253 | | } |
254 | | if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { |
255 | | goto out; |
256 | | } |
257 | | #if defined(__FreeBSD__) |
258 | | ecn_bits = IPV6_TRAFFIC_CLASS(ip6); |
259 | | if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { |
260 | | SCTP_STAT_INCR(sctps_recvhwcrc); |
261 | | compute_crc = 0; |
262 | | } else { |
263 | | #else |
264 | | ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); |
265 | | if (SCTP_BASE_SYSCTL(sctp_no_csum_on_loopback) && |
266 | | (IN6_ARE_ADDR_EQUAL(&src.sin6_addr, &dst.sin6_addr))) { |
267 | | SCTP_STAT_INCR(sctps_recvhwcrc); |
268 | | compute_crc = 0; |
269 | | } else { |
270 | | #endif |
271 | | SCTP_STAT_INCR(sctps_recvswcrc); |
272 | | compute_crc = 1; |
273 | | } |
274 | | sctp_common_input_processing(&m, iphlen, offset, length, |
275 | | (struct sockaddr *)&src, |
276 | | (struct sockaddr *)&dst, |
277 | | sh, ch, |
278 | | compute_crc, |
279 | | ecn_bits, |
280 | | #if defined(__FreeBSD__) |
281 | | mflowtype, mflowid, fibnum, |
282 | | #endif |
283 | | vrf_id, port); |
284 | | out: |
285 | | if (m) { |
286 | | sctp_m_freem(m); |
287 | | } |
288 | | return (IPPROTO_DONE); |
289 | | } |
290 | | |
291 | | #if defined(__APPLE__) |
292 | | int |
293 | | sctp6_input(struct mbuf **i_pak, int *offp) |
294 | | { |
295 | | return (sctp6_input_with_port(i_pak, offp, 0)); |
296 | | } |
297 | | #endif |
298 | | #if defined(__FreeBSD__) |
299 | | int |
300 | | sctp6_input(struct mbuf **i_pak, int *offp, int proto SCTP_UNUSED) |
301 | | { |
302 | | return (sctp6_input_with_port(i_pak, offp, 0)); |
303 | | } |
304 | | #endif |
305 | | |
306 | | void |
307 | | sctp6_notify(struct sctp_inpcb *inp, |
308 | | struct sctp_tcb *stcb, |
309 | | struct sctp_nets *net, |
310 | | uint8_t icmp6_type, |
311 | | uint8_t icmp6_code, |
312 | | uint32_t next_mtu) |
313 | | { |
314 | | #if defined(__APPLE__) |
315 | | struct socket *so; |
316 | | #endif |
317 | | int timer_stopped; |
318 | | |
319 | | switch (icmp6_type) { |
320 | | case ICMP6_DST_UNREACH: |
321 | | if ((icmp6_code == ICMP6_DST_UNREACH_NOROUTE) || |
322 | | (icmp6_code == ICMP6_DST_UNREACH_ADMIN) || |
323 | | (icmp6_code == ICMP6_DST_UNREACH_BEYONDSCOPE) || |
324 | | (icmp6_code == ICMP6_DST_UNREACH_ADDR)) { |
325 | | /* Mark the net unreachable. */ |
326 | | if (net->dest_state & SCTP_ADDR_REACHABLE) { |
327 | | /* Ok that destination is not reachable */ |
328 | | net->dest_state &= ~SCTP_ADDR_REACHABLE; |
329 | | net->dest_state &= ~SCTP_ADDR_PF; |
330 | | sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, |
331 | | stcb, 0, (void *)net, SCTP_SO_NOT_LOCKED); |
332 | | } |
333 | | } |
334 | | SCTP_TCB_UNLOCK(stcb); |
335 | | break; |
336 | | case ICMP6_PARAM_PROB: |
337 | | /* Treat it like an ABORT. */ |
338 | | if (icmp6_code == ICMP6_PARAMPROB_NEXTHEADER) { |
339 | | sctp_abort_notification(stcb, true, false, 0, NULL, SCTP_SO_NOT_LOCKED); |
340 | | #if defined(__APPLE__) |
341 | | so = SCTP_INP_SO(inp); |
342 | | atomic_add_int(&stcb->asoc.refcnt, 1); |
343 | | SCTP_TCB_UNLOCK(stcb); |
344 | | SCTP_SOCKET_LOCK(so, 1); |
345 | | SCTP_TCB_LOCK(stcb); |
346 | | atomic_subtract_int(&stcb->asoc.refcnt, 1); |
347 | | #endif |
348 | | (void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, |
349 | | SCTP_FROM_SCTP_USRREQ + SCTP_LOC_2); |
350 | | #if defined(__APPLE__) |
351 | | SCTP_SOCKET_UNLOCK(so, 1); |
352 | | #endif |
353 | | } else { |
354 | | SCTP_TCB_UNLOCK(stcb); |
355 | | } |
356 | | break; |
357 | | case ICMP6_PACKET_TOO_BIG: |
358 | | if (net->dest_state & SCTP_ADDR_NO_PMTUD) { |
359 | | SCTP_TCB_UNLOCK(stcb); |
360 | | break; |
361 | | } |
362 | | if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { |
363 | | timer_stopped = 1; |
364 | | sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, |
365 | | SCTP_FROM_SCTP_USRREQ + SCTP_LOC_1); |
366 | | } else { |
367 | | timer_stopped = 0; |
368 | | } |
369 | | /* Update the path MTU. */ |
370 | | if (net->port) { |
371 | | next_mtu -= sizeof(struct udphdr); |
372 | | } |
373 | | if (net->mtu > next_mtu) { |
374 | | net->mtu = next_mtu; |
375 | | #if defined(__FreeBSD__) |
376 | | if (net->port) { |
377 | | sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu + sizeof(struct udphdr)); |
378 | | } else { |
379 | | sctp_hc_set_mtu(&net->ro._l_addr, inp->fibnum, next_mtu); |
380 | | } |
381 | | #endif |
382 | | } |
383 | | /* Update the association MTU */ |
384 | | if (stcb->asoc.smallest_mtu > next_mtu) { |
385 | | sctp_pathmtu_adjustment(stcb, next_mtu, true); |
386 | | } |
387 | | /* Finally, start the PMTU timer if it was running before. */ |
388 | | if (timer_stopped) { |
389 | | sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net); |
390 | | } |
391 | | SCTP_TCB_UNLOCK(stcb); |
392 | | break; |
393 | | default: |
394 | | SCTP_TCB_UNLOCK(stcb); |
395 | | break; |
396 | | } |
397 | | } |
398 | | |
399 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
400 | | void |
401 | | sctp6_ctlinput(struct ip6ctlparam *ip6cp) |
402 | | { |
403 | | struct sctp_inpcb *inp; |
404 | | struct sctp_tcb *stcb; |
405 | | struct sctp_nets *net; |
406 | | struct sctphdr sh; |
407 | | struct sockaddr_in6 src, dst; |
408 | | |
409 | | if (icmp6_errmap(ip6cp->ip6c_icmp6) == 0) { |
410 | | return; |
411 | | } |
412 | | |
413 | | /* |
414 | | * Check if we can safely examine the ports and the |
415 | | * verification tag of the SCTP common header. |
416 | | */ |
417 | | if (ip6cp->ip6c_m->m_pkthdr.len < |
418 | | (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { |
419 | | return; |
420 | | } |
421 | | |
422 | | /* Copy out the port numbers and the verification tag. */ |
423 | | memset(&sh, 0, sizeof(sh)); |
424 | | m_copydata(ip6cp->ip6c_m, |
425 | | ip6cp->ip6c_off, |
426 | | sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), |
427 | | (caddr_t)&sh); |
428 | | memset(&src, 0, sizeof(struct sockaddr_in6)); |
429 | | src.sin6_family = AF_INET6; |
430 | | src.sin6_len = sizeof(struct sockaddr_in6); |
431 | | src.sin6_port = sh.src_port; |
432 | | src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; |
433 | | if (in6_setscope(&src.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { |
434 | | return; |
435 | | } |
436 | | memset(&dst, 0, sizeof(struct sockaddr_in6)); |
437 | | dst.sin6_family = AF_INET6; |
438 | | dst.sin6_len = sizeof(struct sockaddr_in6); |
439 | | dst.sin6_port = sh.dest_port; |
440 | | dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; |
441 | | if (in6_setscope(&dst.sin6_addr, ip6cp->ip6c_m->m_pkthdr.rcvif, NULL) != 0) { |
442 | | return; |
443 | | } |
444 | | inp = NULL; |
445 | | net = NULL; |
446 | | stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, |
447 | | (struct sockaddr *)&src, |
448 | | &inp, &net, 1, SCTP_DEFAULT_VRFID); |
449 | | if ((stcb != NULL) && |
450 | | (net != NULL) && |
451 | | (inp != NULL)) { |
452 | | /* Check the verification tag */ |
453 | | if (ntohl(sh.v_tag) != 0) { |
454 | | /* |
455 | | * This must be the verification tag used for |
456 | | * sending out packets. We don't consider |
457 | | * packets reflecting the verification tag. |
458 | | */ |
459 | | if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { |
460 | | SCTP_TCB_UNLOCK(stcb); |
461 | | return; |
462 | | } |
463 | | } else { |
464 | | if (ip6cp->ip6c_m->m_pkthdr.len >= |
465 | | ip6cp->ip6c_off + sizeof(struct sctphdr) + |
466 | | sizeof(struct sctp_chunkhdr) + |
467 | | offsetof(struct sctp_init, a_rwnd)) { |
468 | | /* |
469 | | * In this case we can check if we |
470 | | * got an INIT chunk and if the |
471 | | * initiate tag matches. |
472 | | */ |
473 | | uint32_t initiate_tag; |
474 | | uint8_t chunk_type; |
475 | | |
476 | | m_copydata(ip6cp->ip6c_m, |
477 | | ip6cp->ip6c_off + |
478 | | sizeof(struct sctphdr), |
479 | | sizeof(uint8_t), |
480 | | (caddr_t)&chunk_type); |
481 | | m_copydata(ip6cp->ip6c_m, |
482 | | ip6cp->ip6c_off + |
483 | | sizeof(struct sctphdr) + |
484 | | sizeof(struct sctp_chunkhdr), |
485 | | sizeof(uint32_t), |
486 | | (caddr_t)&initiate_tag); |
487 | | if ((chunk_type != SCTP_INITIATION) || |
488 | | (ntohl(initiate_tag) != stcb->asoc.my_vtag)) { |
489 | | SCTP_TCB_UNLOCK(stcb); |
490 | | return; |
491 | | } |
492 | | } else { |
493 | | SCTP_TCB_UNLOCK(stcb); |
494 | | return; |
495 | | } |
496 | | } |
497 | | sctp6_notify(inp, stcb, net, |
498 | | ip6cp->ip6c_icmp6->icmp6_type, |
499 | | ip6cp->ip6c_icmp6->icmp6_code, |
500 | | ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); |
501 | | } else { |
502 | | if ((stcb == NULL) && (inp != NULL)) { |
503 | | /* reduce inp's ref-count */ |
504 | | SCTP_INP_WLOCK(inp); |
505 | | SCTP_INP_DECR_REF(inp); |
506 | | SCTP_INP_WUNLOCK(inp); |
507 | | } |
508 | | if (stcb) { |
509 | | SCTP_TCB_UNLOCK(stcb); |
510 | | } |
511 | | } |
512 | | } |
513 | | #else |
514 | | void |
515 | | #if defined(__APPLE__) && !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) && !defined(APPLE_ELCAPITAN) |
516 | | sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d, struct ifnet *ifp SCTP_UNUSED) |
517 | | #else |
518 | | sctp6_ctlinput(int cmd, struct sockaddr *pktdst, void *d) |
519 | | #endif |
520 | | { |
521 | | struct ip6ctlparam *ip6cp; |
522 | | struct sctp_inpcb *inp; |
523 | | struct sctp_tcb *stcb; |
524 | | struct sctp_nets *net; |
525 | | struct sctphdr sh; |
526 | | struct sockaddr_in6 src, dst; |
527 | | |
528 | | #ifdef HAVE_SA_LEN |
529 | | if (pktdst->sa_family != AF_INET6 || |
530 | | pktdst->sa_len != sizeof(struct sockaddr_in6)) { |
531 | | #else |
532 | | if (pktdst->sa_family != AF_INET6) { |
533 | | #endif |
534 | | return; |
535 | | } |
536 | | |
537 | | if ((unsigned)cmd >= PRC_NCMDS) { |
538 | | return; |
539 | | } |
540 | | if (PRC_IS_REDIRECT(cmd)) { |
541 | | d = NULL; |
542 | | } else if (inet6ctlerrmap[cmd] == 0) { |
543 | | return; |
544 | | } |
545 | | /* If the parameter is from icmp6, decode it. */ |
546 | | if (d != NULL) { |
547 | | ip6cp = (struct ip6ctlparam *)d; |
548 | | } else { |
549 | | ip6cp = (struct ip6ctlparam *)NULL; |
550 | | } |
551 | | |
552 | | if (ip6cp != NULL) { |
553 | | /* |
554 | | * XXX: We assume that when IPV6 is non NULL, M and OFF are |
555 | | * valid. |
556 | | */ |
557 | | if (ip6cp->ip6c_m == NULL) { |
558 | | return; |
559 | | } |
560 | | |
561 | | /* Check if we can safely examine the ports and the |
562 | | * verification tag of the SCTP common header. |
563 | | */ |
564 | | if (ip6cp->ip6c_m->m_pkthdr.len < |
565 | | (int32_t)(ip6cp->ip6c_off + offsetof(struct sctphdr, checksum))) { |
566 | | return; |
567 | | } |
568 | | |
569 | | /* Copy out the port numbers and the verification tag. */ |
570 | | memset(&sh, 0, sizeof(sh)); |
571 | | m_copydata(ip6cp->ip6c_m, |
572 | | ip6cp->ip6c_off, |
573 | | sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint32_t), |
574 | | (caddr_t)&sh); |
575 | | memset(&src, 0, sizeof(struct sockaddr_in6)); |
576 | | src.sin6_family = AF_INET6; |
577 | | #ifdef HAVE_SIN6_LEN |
578 | | src.sin6_len = sizeof(struct sockaddr_in6); |
579 | | #endif |
580 | | src.sin6_port = sh.src_port; |
581 | | src.sin6_addr = ip6cp->ip6c_ip6->ip6_src; |
582 | | memset(&dst, 0, sizeof(struct sockaddr_in6)); |
583 | | dst.sin6_family = AF_INET6; |
584 | | #ifdef HAVE_SIN6_LEN |
585 | | dst.sin6_len = sizeof(struct sockaddr_in6); |
586 | | #endif |
587 | | dst.sin6_port = sh.dest_port; |
588 | | dst.sin6_addr = ip6cp->ip6c_ip6->ip6_dst; |
589 | | inp = NULL; |
590 | | net = NULL; |
591 | | stcb = sctp_findassociation_addr_sa((struct sockaddr *)&dst, |
592 | | (struct sockaddr *)&src, |
593 | | &inp, &net, 1, SCTP_DEFAULT_VRFID); |
594 | | if ((stcb != NULL) && |
595 | | (net != NULL) && |
596 | | (inp != NULL)) { |
597 | | /* Check the verification tag */ |
598 | | if (ntohl(sh.v_tag) != 0) { |
599 | | /* |
600 | | * This must be the verification tag used for |
601 | | * sending out packets. We don't consider |
602 | | * packets reflecting the verification tag. |
603 | | */ |
604 | | if (ntohl(sh.v_tag) != stcb->asoc.peer_vtag) { |
605 | | SCTP_TCB_UNLOCK(stcb); |
606 | | return; |
607 | | } |
608 | | } else { |
609 | | SCTP_TCB_UNLOCK(stcb); |
610 | | return; |
611 | | } |
612 | | sctp6_notify(inp, stcb, net, |
613 | | ip6cp->ip6c_icmp6->icmp6_type, |
614 | | ip6cp->ip6c_icmp6->icmp6_code, |
615 | | ntohl(ip6cp->ip6c_icmp6->icmp6_mtu)); |
616 | | #if defined(__Userspace__) |
617 | | if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) && |
618 | | (stcb->sctp_socket != NULL)) { |
619 | | struct socket *upcall_socket; |
620 | | |
621 | | upcall_socket = stcb->sctp_socket; |
622 | | SOCK_LOCK(upcall_socket); |
623 | | soref(upcall_socket); |
624 | | SOCK_UNLOCK(upcall_socket); |
625 | | if ((upcall_socket->so_upcall != NULL) && |
626 | | (upcall_socket->so_error != 0)) { |
627 | | (*upcall_socket->so_upcall)(upcall_socket, upcall_socket->so_upcallarg, M_NOWAIT); |
628 | | } |
629 | | ACCEPT_LOCK(); |
630 | | SOCK_LOCK(upcall_socket); |
631 | | sorele(upcall_socket); |
632 | | } |
633 | | #endif |
634 | | } else { |
635 | | if ((stcb == NULL) && (inp != NULL)) { |
636 | | /* reduce inp's ref-count */ |
637 | | SCTP_INP_WLOCK(inp); |
638 | | SCTP_INP_DECR_REF(inp); |
639 | | SCTP_INP_WUNLOCK(inp); |
640 | | } |
641 | | if (stcb) { |
642 | | SCTP_TCB_UNLOCK(stcb); |
643 | | } |
644 | | } |
645 | | } |
646 | | } |
647 | | #endif |
648 | | #endif |
649 | | |
650 | | /* |
651 | | * this routine can probably be collapsed into the one in sctp_userreq.c |
652 | | * since they do the same thing and now we lookup with a sockaddr |
653 | | */ |
654 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
655 | | static int |
656 | | sctp6_getcred(SYSCTL_HANDLER_ARGS) |
657 | | { |
658 | | struct xucred xuc; |
659 | | struct sockaddr_in6 addrs[2]; |
660 | | struct sctp_inpcb *inp; |
661 | | struct sctp_nets *net; |
662 | | struct sctp_tcb *stcb; |
663 | | int error; |
664 | | uint32_t vrf_id; |
665 | | |
666 | | vrf_id = SCTP_DEFAULT_VRFID; |
667 | | |
668 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
669 | | error = priv_check(req->td, PRIV_NETINET_GETCRED); |
670 | | #else |
671 | | error = suser(req->p); |
672 | | #endif |
673 | | if (error) |
674 | | return (error); |
675 | | |
676 | | if (req->newlen != sizeof(addrs)) { |
677 | | SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
678 | | return (EINVAL); |
679 | | } |
680 | | if (req->oldlen != sizeof(struct ucred)) { |
681 | | SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
682 | | return (EINVAL); |
683 | | } |
684 | | error = SYSCTL_IN(req, addrs, sizeof(addrs)); |
685 | | if (error) |
686 | | return (error); |
687 | | |
688 | | stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[1]), |
689 | | sin6tosa(&addrs[0]), |
690 | | &inp, &net, 1, vrf_id); |
691 | | if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) { |
692 | | if ((inp != NULL) && (stcb == NULL)) { |
693 | | /* reduce ref-count */ |
694 | | SCTP_INP_WLOCK(inp); |
695 | | SCTP_INP_DECR_REF(inp); |
696 | | goto cred_can_cont; |
697 | | } |
698 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); |
699 | | error = ENOENT; |
700 | | goto out; |
701 | | } |
702 | | SCTP_TCB_UNLOCK(stcb); |
703 | | /* We use the write lock here, only |
704 | | * since in the error leg we need it. |
705 | | * If we used RLOCK, then we would have |
706 | | * to wlock/decr/unlock/rlock. Which |
707 | | * in theory could create a hole. Better |
708 | | * to use higher wlock. |
709 | | */ |
710 | | SCTP_INP_WLOCK(inp); |
711 | | cred_can_cont: |
712 | | error = cr_canseesocket(req->td->td_ucred, inp->sctp_socket); |
713 | | if (error) { |
714 | | SCTP_INP_WUNLOCK(inp); |
715 | | goto out; |
716 | | } |
717 | | cru2x(inp->sctp_socket->so_cred, &xuc); |
718 | | SCTP_INP_WUNLOCK(inp); |
719 | | error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); |
720 | | out: |
721 | | return (error); |
722 | | } |
723 | | |
724 | | SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, |
725 | | CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_NEEDGIANT, |
726 | | 0, 0, sctp6_getcred, "S,ucred", |
727 | | "Get the ucred of a SCTP6 connection"); |
728 | | #endif |
729 | | |
730 | | #if defined(__Userspace__) |
731 | | int |
732 | | sctp6_attach(struct socket *so, int proto SCTP_UNUSED, uint32_t vrf_id) |
733 | | #elif defined(__FreeBSD__) |
734 | | static int |
735 | | sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct thread *p SCTP_UNUSED) |
736 | | #elif defined(_WIN32) |
737 | | static int |
738 | | sctp6_attach(struct socket *so, int proto SCTP_UNUSED, PKTHREAD p SCTP_UNUSED) |
739 | | #else |
740 | | static int |
741 | | sctp6_attach(struct socket *so, int proto SCTP_UNUSED, struct proc *p SCTP_UNUSED) |
742 | | #endif |
743 | 0 | { |
744 | 0 | int error; |
745 | 0 | struct sctp_inpcb *inp; |
746 | | #if !defined(__Userspace__) |
747 | | uint32_t vrf_id = SCTP_DEFAULT_VRFID; |
748 | | #endif |
749 | |
|
750 | 0 | inp = (struct sctp_inpcb *)so->so_pcb; |
751 | 0 | if (inp != NULL) { |
752 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
753 | 0 | return (EINVAL); |
754 | 0 | } |
755 | | |
756 | 0 | if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { |
757 | 0 | error = SCTP_SORESERVE(so, SCTP_BASE_SYSCTL(sctp_sendspace), SCTP_BASE_SYSCTL(sctp_recvspace)); |
758 | 0 | if (error) |
759 | 0 | return (error); |
760 | 0 | } |
761 | 0 | error = sctp_inpcb_alloc(so, vrf_id); |
762 | 0 | if (error) |
763 | 0 | return (error); |
764 | 0 | inp = (struct sctp_inpcb *)so->so_pcb; |
765 | 0 | SCTP_INP_WLOCK(inp); |
766 | 0 | inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */ |
767 | |
|
768 | 0 | inp->ip_inp.inp.inp_vflag |= INP_IPV6; |
769 | 0 | inp->ip_inp.inp.in6p_hops = -1; /* use kernel default */ |
770 | 0 | inp->ip_inp.inp.in6p_cksum = -1; /* just to be sure */ |
771 | 0 | #ifdef INET |
772 | | /* |
773 | | * XXX: ugly!! IPv4 TTL initialization is necessary for an IPv6 |
774 | | * socket as well, because the socket may be bound to an IPv6 |
775 | | * wildcard address, which may match an IPv4-mapped IPv6 address. |
776 | | */ |
777 | 0 | inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); |
778 | 0 | #endif |
779 | 0 | SCTP_INP_WUNLOCK(inp); |
780 | 0 | return (0); |
781 | 0 | } |
782 | | |
783 | | #if defined(__Userspace__) |
784 | | int |
785 | | sctp6_bind(struct socket *so, struct sockaddr *addr, void * p) |
786 | 0 | { |
787 | | #elif defined(__FreeBSD__) |
788 | | static int |
789 | | sctp6_bind(struct socket *so, struct sockaddr *addr, struct thread *p) |
790 | | { |
791 | | #elif defined(__APPLE__) |
792 | | static int |
793 | | sctp6_bind(struct socket *so, struct sockaddr *addr, struct proc *p) |
794 | | { |
795 | | #elif defined(_WIN32) |
796 | | static int |
797 | | sctp6_bind(struct socket *so, struct sockaddr *addr, PKTHREAD p) |
798 | | { |
799 | | #else |
800 | | static int |
801 | | sctp6_bind(struct socket *so, struct mbuf *nam, struct proc *p) |
802 | | { |
803 | | struct sockaddr *addr = nam ? mtod(nam, struct sockaddr *): NULL; |
804 | | |
805 | | #endif |
806 | 0 | struct sctp_inpcb *inp; |
807 | 0 | int error; |
808 | 0 | u_char vflagsav; |
809 | |
|
810 | 0 | inp = (struct sctp_inpcb *)so->so_pcb; |
811 | 0 | if (inp == NULL) { |
812 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
813 | 0 | return (EINVAL); |
814 | 0 | } |
815 | | |
816 | 0 | #if !(defined(_WIN32) && !defined(__Userspace__)) |
817 | 0 | if (addr) { |
818 | 0 | switch (addr->sa_family) { |
819 | 0 | #ifdef INET |
820 | 0 | case AF_INET: |
821 | | #ifdef HAVE_SA_LEN |
822 | | if (addr->sa_len != sizeof(struct sockaddr_in)) { |
823 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
824 | | return (EINVAL); |
825 | | } |
826 | | #endif |
827 | 0 | break; |
828 | 0 | #endif |
829 | 0 | #ifdef INET6 |
830 | 0 | case AF_INET6: |
831 | | #ifdef HAVE_SA_LEN |
832 | | if (addr->sa_len != sizeof(struct sockaddr_in6)) { |
833 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
834 | | return (EINVAL); |
835 | | } |
836 | | #endif |
837 | 0 | break; |
838 | 0 | #endif |
839 | 0 | default: |
840 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
841 | 0 | return (EINVAL); |
842 | 0 | } |
843 | 0 | } |
844 | 0 | #endif |
845 | 0 | vflagsav = inp->ip_inp.inp.inp_vflag; |
846 | 0 | inp->ip_inp.inp.inp_vflag &= ~INP_IPV4; |
847 | 0 | inp->ip_inp.inp.inp_vflag |= INP_IPV6; |
848 | 0 | if ((addr != NULL) && (SCTP_IPV6_V6ONLY(inp) == 0)) { |
849 | 0 | switch (addr->sa_family) { |
850 | 0 | #ifdef INET |
851 | 0 | case AF_INET: |
852 | | /* binding v4 addr to v6 socket, so reset flags */ |
853 | 0 | inp->ip_inp.inp.inp_vflag |= INP_IPV4; |
854 | 0 | inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; |
855 | 0 | break; |
856 | 0 | #endif |
857 | 0 | #ifdef INET6 |
858 | 0 | case AF_INET6: |
859 | 0 | { |
860 | 0 | struct sockaddr_in6 *sin6_p; |
861 | |
|
862 | 0 | sin6_p = (struct sockaddr_in6 *)addr; |
863 | |
|
864 | 0 | if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) { |
865 | 0 | inp->ip_inp.inp.inp_vflag |= INP_IPV4; |
866 | 0 | } |
867 | 0 | #ifdef INET |
868 | 0 | if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { |
869 | 0 | struct sockaddr_in sin; |
870 | |
|
871 | 0 | in6_sin6_2_sin(&sin, sin6_p); |
872 | 0 | inp->ip_inp.inp.inp_vflag |= INP_IPV4; |
873 | 0 | inp->ip_inp.inp.inp_vflag &= ~INP_IPV6; |
874 | 0 | error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, NULL, p); |
875 | 0 | goto out; |
876 | 0 | } |
877 | 0 | #endif |
878 | 0 | break; |
879 | 0 | } |
880 | 0 | #endif |
881 | 0 | default: |
882 | 0 | break; |
883 | 0 | } |
884 | 0 | } else if (addr != NULL) { |
885 | 0 | struct sockaddr_in6 *sin6_p; |
886 | | |
887 | | /* IPV6_V6ONLY socket */ |
888 | 0 | #ifdef INET |
889 | 0 | if (addr->sa_family == AF_INET) { |
890 | | /* can't bind v4 addr to v6 only socket! */ |
891 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
892 | 0 | error = EINVAL; |
893 | 0 | goto out; |
894 | 0 | } |
895 | 0 | #endif |
896 | 0 | sin6_p = (struct sockaddr_in6 *)addr; |
897 | |
|
898 | 0 | if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { |
899 | | /* can't bind v4-mapped addrs either! */ |
900 | | /* NOTE: we don't support SIIT */ |
901 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
902 | 0 | error = EINVAL; |
903 | 0 | goto out; |
904 | 0 | } |
905 | 0 | } |
906 | 0 | error = sctp_inpcb_bind(so, addr, NULL, p); |
907 | 0 | out: |
908 | 0 | if (error != 0) |
909 | 0 | inp->ip_inp.inp.inp_vflag = vflagsav; |
910 | 0 | return (error); |
911 | 0 | } |
912 | | |
913 | | #if defined(__FreeBSD__) || defined(_WIN32) || defined(__Userspace__) |
914 | | #if !defined(__Userspace__) |
915 | | static void |
916 | | #else |
917 | | void |
918 | | #endif |
919 | | sctp6_close(struct socket *so) |
920 | 0 | { |
921 | 0 | sctp_close(so); |
922 | 0 | } |
923 | | |
924 | | /* This could be made common with sctp_detach() since they are identical */ |
925 | | #else |
926 | | |
927 | | static |
928 | | int |
929 | | sctp6_detach(struct socket *so) |
930 | | { |
931 | | #if defined(__Userspace__) |
932 | | sctp_close(so); |
933 | | return (0); |
934 | | #else |
935 | | return (sctp_detach(so)); |
936 | | #endif |
937 | | } |
938 | | |
939 | | #endif |
940 | | |
941 | | int |
942 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
943 | | sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, |
944 | | struct mbuf *control, struct thread *p); |
945 | | #else |
946 | | sctp_sendm(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, |
947 | | struct mbuf *control, struct proc *p); |
948 | | #endif |
949 | | |
950 | | #if !defined(_WIN32) && !defined(__Userspace__) |
951 | | #if defined(__FreeBSD__) |
952 | | static int |
953 | | sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, |
954 | | struct mbuf *control, struct thread *p) |
955 | | { |
956 | | #elif defined(__APPLE__) |
957 | | static int |
958 | | sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, |
959 | | struct mbuf *control, struct proc *p) |
960 | | { |
961 | | #else |
962 | | static int |
963 | | sctp6_send(struct socket *so, int flags, struct mbuf *m, struct mbuf *nam, |
964 | | struct mbuf *control, struct proc *p) |
965 | | { |
966 | | struct sockaddr *addr = nam ? mtod(nam, struct sockaddr *): NULL; |
967 | | #endif |
968 | | struct sctp_inpcb *inp; |
969 | | |
970 | | #ifdef INET |
971 | | struct sockaddr_in6 *sin6; |
972 | | #endif /* INET */ |
973 | | /* No SPL needed since sctp_output does this */ |
974 | | |
975 | | inp = (struct sctp_inpcb *)so->so_pcb; |
976 | | if (inp == NULL) { |
977 | | if (control) { |
978 | | SCTP_RELEASE_PKT(control); |
979 | | control = NULL; |
980 | | } |
981 | | SCTP_RELEASE_PKT(m); |
982 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
983 | | return (EINVAL); |
984 | | } |
985 | | /* |
986 | | * For the TCP model we may get a NULL addr, if we are a connected |
987 | | * socket thats ok. |
988 | | */ |
989 | | if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) && |
990 | | (addr == NULL)) { |
991 | | goto connected_type; |
992 | | } |
993 | | if (addr == NULL) { |
994 | | SCTP_RELEASE_PKT(m); |
995 | | if (control) { |
996 | | SCTP_RELEASE_PKT(control); |
997 | | control = NULL; |
998 | | } |
999 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EDESTADDRREQ); |
1000 | | return (EDESTADDRREQ); |
1001 | | } |
1002 | | switch (addr->sa_family) { |
1003 | | #ifdef INET |
1004 | | case AF_INET: |
1005 | | #if defined(HAVE_SA_LEN) |
1006 | | if (addr->sa_len != sizeof(struct sockaddr_in)) { |
1007 | | if (control) { |
1008 | | SCTP_RELEASE_PKT(control); |
1009 | | control = NULL; |
1010 | | } |
1011 | | SCTP_RELEASE_PKT(m); |
1012 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1013 | | return (EINVAL); |
1014 | | } |
1015 | | #endif |
1016 | | break; |
1017 | | #endif |
1018 | | #ifdef INET6 |
1019 | | case AF_INET6: |
1020 | | #if defined(HAVE_SA_LEN) |
1021 | | if (addr->sa_len != sizeof(struct sockaddr_in6)) { |
1022 | | if (control) { |
1023 | | SCTP_RELEASE_PKT(control); |
1024 | | control = NULL; |
1025 | | } |
1026 | | SCTP_RELEASE_PKT(m); |
1027 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1028 | | return (EINVAL); |
1029 | | } |
1030 | | #endif |
1031 | | break; |
1032 | | #endif |
1033 | | default: |
1034 | | if (control) { |
1035 | | SCTP_RELEASE_PKT(control); |
1036 | | control = NULL; |
1037 | | } |
1038 | | SCTP_RELEASE_PKT(m); |
1039 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1040 | | return (EINVAL); |
1041 | | } |
1042 | | #ifdef INET |
1043 | | sin6 = (struct sockaddr_in6 *)addr; |
1044 | | if (SCTP_IPV6_V6ONLY(inp)) { |
1045 | | /* |
1046 | | * if IPV6_V6ONLY flag, we discard datagrams destined to a |
1047 | | * v4 addr or v4-mapped addr |
1048 | | */ |
1049 | | if (addr->sa_family == AF_INET) { |
1050 | | if (control) { |
1051 | | SCTP_RELEASE_PKT(control); |
1052 | | control = NULL; |
1053 | | } |
1054 | | SCTP_RELEASE_PKT(m); |
1055 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1056 | | return (EINVAL); |
1057 | | } |
1058 | | if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { |
1059 | | if (control) { |
1060 | | SCTP_RELEASE_PKT(control); |
1061 | | control = NULL; |
1062 | | } |
1063 | | SCTP_RELEASE_PKT(m); |
1064 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1065 | | return (EINVAL); |
1066 | | } |
1067 | | } |
1068 | | if ((addr->sa_family == AF_INET6) && |
1069 | | IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { |
1070 | | struct sockaddr_in sin; |
1071 | | |
1072 | | /* convert v4-mapped into v4 addr and send */ |
1073 | | in6_sin6_2_sin(&sin, sin6); |
1074 | | return (sctp_sendm(so, flags, m, (struct sockaddr *)&sin, control, p)); |
1075 | | } |
1076 | | #endif /* INET */ |
1077 | | connected_type: |
1078 | | /* now what about control */ |
1079 | | if (control) { |
1080 | | if (inp->control) { |
1081 | | SCTP_PRINTF("huh? control set?\n"); |
1082 | | SCTP_RELEASE_PKT(inp->control); |
1083 | | inp->control = NULL; |
1084 | | } |
1085 | | inp->control = control; |
1086 | | } |
1087 | | /* Place the data */ |
1088 | | if (inp->pkt) { |
1089 | | SCTP_BUF_NEXT(inp->pkt_last) = m; |
1090 | | inp->pkt_last = m; |
1091 | | } else { |
1092 | | inp->pkt_last = inp->pkt = m; |
1093 | | } |
1094 | | if ( |
1095 | | #if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__) |
1096 | | /* FreeBSD and MacOSX uses a flag passed */ |
1097 | | ((flags & PRUS_MORETOCOME) == 0) |
1098 | | #else |
1099 | | 1 /* Open BSD does not have any "more to come" |
1100 | | * indication */ |
1101 | | #endif |
1102 | | ) { |
1103 | | /* |
1104 | | * note with the current version this code will only be used |
1105 | | * by OpenBSD, NetBSD and FreeBSD have methods for |
1106 | | * re-defining sosend() to use sctp_sosend(). One can |
1107 | | * optionally switch back to this code (by changing back the |
1108 | | * definitions but this is not advisable. |
1109 | | */ |
1110 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
1111 | | struct epoch_tracker et; |
1112 | | #endif |
1113 | | int ret; |
1114 | | |
1115 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
1116 | | NET_EPOCH_ENTER(et); |
1117 | | #endif |
1118 | | ret = sctp_output(inp, inp->pkt, addr, inp->control, p, flags); |
1119 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
1120 | | NET_EPOCH_EXIT(et); |
1121 | | #endif |
1122 | | inp->pkt = NULL; |
1123 | | inp->control = NULL; |
1124 | | return (ret); |
1125 | | } else { |
1126 | | return (0); |
1127 | | } |
1128 | | } |
1129 | | #endif |
1130 | | |
1131 | | #if defined(__Userspace__) |
1132 | | int |
1133 | | sctp6_connect(struct socket *so, struct sockaddr *addr) |
1134 | 0 | { |
1135 | 0 | void *p = NULL; |
1136 | | #elif defined(__FreeBSD__) |
1137 | | static int |
1138 | | sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) |
1139 | | { |
1140 | | #elif defined(__APPLE__) |
1141 | | static int |
1142 | | sctp6_connect(struct socket *so, struct sockaddr *addr, struct proc *p) |
1143 | | { |
1144 | | #elif defined(_WIN32) |
1145 | | static int |
1146 | | sctp6_connect(struct socket *so, struct sockaddr *addr, PKTHREAD p) |
1147 | | { |
1148 | | #else |
1149 | | static int |
1150 | | sctp6_connect(struct socket *so, struct mbuf *nam, struct proc *p) |
1151 | | { |
1152 | | struct sockaddr *addr = mtod(nam, struct sockaddr *); |
1153 | | #endif |
1154 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
1155 | | struct epoch_tracker et; |
1156 | | #endif |
1157 | 0 | uint32_t vrf_id; |
1158 | 0 | int error = 0; |
1159 | 0 | struct sctp_inpcb *inp; |
1160 | 0 | struct sctp_tcb *stcb; |
1161 | 0 | #ifdef INET |
1162 | 0 | struct sockaddr_in6 *sin6; |
1163 | 0 | union sctp_sockstore store; |
1164 | 0 | #endif |
1165 | |
|
1166 | 0 | inp = (struct sctp_inpcb *)so->so_pcb; |
1167 | 0 | if (inp == NULL) { |
1168 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); |
1169 | 0 | return (ECONNRESET); /* I made the same as TCP since we are |
1170 | | * not setup? */ |
1171 | 0 | } |
1172 | 0 | if (addr == NULL) { |
1173 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1174 | 0 | return (EINVAL); |
1175 | 0 | } |
1176 | 0 | #if !(defined(_WIN32) && !defined(__Userspace__)) |
1177 | 0 | switch (addr->sa_family) { |
1178 | 0 | #ifdef INET |
1179 | 0 | case AF_INET: |
1180 | | #ifdef HAVE_SA_LEN |
1181 | | if (addr->sa_len != sizeof(struct sockaddr_in)) { |
1182 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1183 | | return (EINVAL); |
1184 | | } |
1185 | | #endif |
1186 | 0 | break; |
1187 | 0 | #endif |
1188 | 0 | #ifdef INET6 |
1189 | 0 | case AF_INET6: |
1190 | | #ifdef HAVE_SA_LEN |
1191 | | if (addr->sa_len != sizeof(struct sockaddr_in6)) { |
1192 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1193 | | return (EINVAL); |
1194 | | } |
1195 | | #endif |
1196 | 0 | break; |
1197 | 0 | #endif |
1198 | 0 | default: |
1199 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1200 | 0 | return (EINVAL); |
1201 | 0 | } |
1202 | 0 | #endif |
1203 | | |
1204 | 0 | vrf_id = inp->def_vrf_id; |
1205 | 0 | SCTP_ASOC_CREATE_LOCK(inp); |
1206 | 0 | SCTP_INP_RLOCK(inp); |
1207 | 0 | if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == |
1208 | 0 | SCTP_PCB_FLAGS_UNBOUND) { |
1209 | | /* Bind a ephemeral port */ |
1210 | 0 | SCTP_INP_RUNLOCK(inp); |
1211 | 0 | error = sctp6_bind(so, NULL, p); |
1212 | 0 | if (error) { |
1213 | 0 | SCTP_ASOC_CREATE_UNLOCK(inp); |
1214 | | |
1215 | 0 | return (error); |
1216 | 0 | } |
1217 | 0 | SCTP_INP_RLOCK(inp); |
1218 | 0 | } |
1219 | 0 | if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && |
1220 | 0 | (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) { |
1221 | | /* We are already connected AND the TCP model */ |
1222 | 0 | SCTP_INP_RUNLOCK(inp); |
1223 | 0 | SCTP_ASOC_CREATE_UNLOCK(inp); |
1224 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EADDRINUSE); |
1225 | 0 | return (EADDRINUSE); |
1226 | 0 | } |
1227 | 0 | #ifdef INET |
1228 | 0 | sin6 = (struct sockaddr_in6 *)addr; |
1229 | 0 | if (SCTP_IPV6_V6ONLY(inp)) { |
1230 | | /* |
1231 | | * if IPV6_V6ONLY flag, ignore connections destined to a v4 |
1232 | | * addr or v4-mapped addr |
1233 | | */ |
1234 | 0 | if (addr->sa_family == AF_INET) { |
1235 | 0 | SCTP_INP_RUNLOCK(inp); |
1236 | 0 | SCTP_ASOC_CREATE_UNLOCK(inp); |
1237 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1238 | 0 | return (EINVAL); |
1239 | 0 | } |
1240 | 0 | if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { |
1241 | 0 | SCTP_INP_RUNLOCK(inp); |
1242 | 0 | SCTP_ASOC_CREATE_UNLOCK(inp); |
1243 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1244 | 0 | return (EINVAL); |
1245 | 0 | } |
1246 | 0 | } |
1247 | 0 | if ((addr->sa_family == AF_INET6) && |
1248 | 0 | IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { |
1249 | | /* convert v4-mapped into v4 addr */ |
1250 | 0 | in6_sin6_2_sin(&store.sin, sin6); |
1251 | 0 | addr = &store.sa; |
1252 | 0 | } |
1253 | 0 | #endif /* INET */ |
1254 | | /* Now do we connect? */ |
1255 | 0 | if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { |
1256 | 0 | stcb = LIST_FIRST(&inp->sctp_asoc_list); |
1257 | 0 | if (stcb) { |
1258 | 0 | SCTP_TCB_LOCK(stcb); |
1259 | 0 | } |
1260 | 0 | SCTP_INP_RUNLOCK(inp); |
1261 | 0 | } else { |
1262 | 0 | SCTP_INP_RUNLOCK(inp); |
1263 | 0 | SCTP_INP_WLOCK(inp); |
1264 | 0 | SCTP_INP_INCR_REF(inp); |
1265 | 0 | SCTP_INP_WUNLOCK(inp); |
1266 | 0 | stcb = sctp_findassociation_ep_addr(&inp, addr, NULL, NULL, NULL); |
1267 | 0 | if (stcb == NULL) { |
1268 | 0 | SCTP_INP_WLOCK(inp); |
1269 | 0 | SCTP_INP_DECR_REF(inp); |
1270 | 0 | SCTP_INP_WUNLOCK(inp); |
1271 | 0 | } |
1272 | 0 | } |
1273 | | |
1274 | 0 | if (stcb != NULL) { |
1275 | | /* Already have or am bring up an association */ |
1276 | 0 | SCTP_ASOC_CREATE_UNLOCK(inp); |
1277 | 0 | SCTP_TCB_UNLOCK(stcb); |
1278 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EALREADY); |
1279 | 0 | return (EALREADY); |
1280 | 0 | } |
1281 | | /* We are GOOD to go */ |
1282 | 0 | stcb = sctp_aloc_assoc_connected(inp, addr, &error, 0, 0, vrf_id, |
1283 | 0 | inp->sctp_ep.pre_open_stream_count, |
1284 | 0 | inp->sctp_ep.port, p, |
1285 | 0 | SCTP_INITIALIZE_AUTH_PARAMS); |
1286 | 0 | SCTP_ASOC_CREATE_UNLOCK(inp); |
1287 | 0 | if (stcb == NULL) { |
1288 | | /* Gak! no memory */ |
1289 | 0 | return (error); |
1290 | 0 | } |
1291 | 0 | SCTP_SET_STATE(stcb, SCTP_STATE_COOKIE_WAIT); |
1292 | 0 | (void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered); |
1293 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
1294 | | NET_EPOCH_ENTER(et); |
1295 | | #endif |
1296 | 0 | sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); |
1297 | 0 | SCTP_TCB_UNLOCK(stcb); |
1298 | | #if defined(__FreeBSD__) && !defined(__Userspace__) |
1299 | | NET_EPOCH_EXIT(et); |
1300 | | #endif |
1301 | 0 | return (error); |
1302 | 0 | } |
1303 | | |
1304 | | static int |
1305 | | #if !defined(__Userspace__) |
1306 | | sctp6_getaddr(struct socket *so, struct sockaddr **addr) |
1307 | | { |
1308 | | struct sockaddr_in6 *sin6; |
1309 | | #else |
1310 | | sctp6_getaddr(struct socket *so, struct mbuf *nam) |
1311 | 0 | { |
1312 | 0 | struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); |
1313 | 0 | #endif |
1314 | 0 | struct sctp_inpcb *inp; |
1315 | 0 | uint32_t vrf_id; |
1316 | 0 | struct sctp_ifa *sctp_ifa; |
1317 | |
|
1318 | | #if defined(SCTP_KAME) && defined(SCTP_EMBEDDED_V6_SCOPE) |
1319 | | int error; |
1320 | | #endif |
1321 | | |
1322 | | /* |
1323 | | * Do the malloc first in case it blocks. |
1324 | | */ |
1325 | | #if !defined(__Userspace__) |
1326 | | SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof(*sin6)); |
1327 | | if (sin6 == NULL) |
1328 | | return (ENOMEM); |
1329 | | #else |
1330 | 0 | SCTP_BUF_LEN(nam) = sizeof(*sin6); |
1331 | 0 | memset(sin6, 0, sizeof(*sin6)); |
1332 | 0 | #endif |
1333 | 0 | sin6->sin6_family = AF_INET6; |
1334 | | #ifdef HAVE_SIN6_LEN |
1335 | | sin6->sin6_len = sizeof(*sin6); |
1336 | | #endif |
1337 | |
|
1338 | 0 | inp = (struct sctp_inpcb *)so->so_pcb; |
1339 | 0 | if (inp == NULL) { |
1340 | | #if !defined(__Userspace__) |
1341 | | SCTP_FREE_SONAME(sin6); |
1342 | | #endif |
1343 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); |
1344 | 0 | return (ECONNRESET); |
1345 | 0 | } |
1346 | 0 | SCTP_INP_RLOCK(inp); |
1347 | 0 | sin6->sin6_port = inp->sctp_lport; |
1348 | 0 | if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { |
1349 | | /* For the bound all case you get back 0 */ |
1350 | 0 | if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { |
1351 | 0 | struct sctp_tcb *stcb; |
1352 | 0 | struct sockaddr_in6 *sin_a6; |
1353 | 0 | struct sctp_nets *net; |
1354 | 0 | int fnd; |
1355 | 0 | stcb = LIST_FIRST(&inp->sctp_asoc_list); |
1356 | 0 | if (stcb == NULL) { |
1357 | 0 | SCTP_INP_RUNLOCK(inp); |
1358 | | #if !defined(__Userspace__) |
1359 | | SCTP_FREE_SONAME(sin6); |
1360 | | #endif |
1361 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); |
1362 | 0 | return (ENOENT); |
1363 | 0 | } |
1364 | 0 | fnd = 0; |
1365 | 0 | sin_a6 = NULL; |
1366 | 0 | TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { |
1367 | 0 | sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; |
1368 | 0 | if (sin_a6 == NULL) |
1369 | | /* this will make coverity happy */ |
1370 | 0 | continue; |
1371 | | |
1372 | 0 | if (sin_a6->sin6_family == AF_INET6) { |
1373 | 0 | fnd = 1; |
1374 | 0 | break; |
1375 | 0 | } |
1376 | 0 | } |
1377 | 0 | if ((!fnd) || (sin_a6 == NULL)) { |
1378 | | /* punt */ |
1379 | 0 | SCTP_INP_RUNLOCK(inp); |
1380 | | #if !defined(__Userspace__) |
1381 | | SCTP_FREE_SONAME(sin6); |
1382 | | #endif |
1383 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); |
1384 | 0 | return (ENOENT); |
1385 | 0 | } |
1386 | 0 | vrf_id = inp->def_vrf_id; |
1387 | 0 | sctp_ifa = sctp_source_address_selection(inp, stcb, (sctp_route_t *)&net->ro, net, 0, vrf_id); |
1388 | 0 | if (sctp_ifa) { |
1389 | 0 | sin6->sin6_addr = sctp_ifa->address.sin6.sin6_addr; |
1390 | 0 | } |
1391 | 0 | } else { |
1392 | | /* For the bound all case you get back 0 */ |
1393 | 0 | memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr)); |
1394 | 0 | } |
1395 | 0 | } else { |
1396 | | /* Take the first IPv6 address in the list */ |
1397 | 0 | struct sctp_laddr *laddr; |
1398 | 0 | int fnd = 0; |
1399 | |
|
1400 | 0 | LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { |
1401 | 0 | if (laddr->ifa->address.sa.sa_family == AF_INET6) { |
1402 | 0 | struct sockaddr_in6 *sin_a; |
1403 | |
|
1404 | 0 | sin_a = &laddr->ifa->address.sin6; |
1405 | 0 | sin6->sin6_addr = sin_a->sin6_addr; |
1406 | 0 | fnd = 1; |
1407 | 0 | break; |
1408 | 0 | } |
1409 | 0 | } |
1410 | 0 | if (!fnd) { |
1411 | | #if !defined(__Userspace__) |
1412 | | SCTP_FREE_SONAME(sin6); |
1413 | | #endif |
1414 | 0 | SCTP_INP_RUNLOCK(inp); |
1415 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); |
1416 | 0 | return (ENOENT); |
1417 | 0 | } |
1418 | 0 | } |
1419 | 0 | SCTP_INP_RUNLOCK(inp); |
1420 | | /* Scoping things for v6 */ |
1421 | | #ifdef SCTP_EMBEDDED_V6_SCOPE |
1422 | | #ifdef SCTP_KAME |
1423 | | if ((error = sa6_recoverscope(sin6)) != 0) { |
1424 | | SCTP_FREE_SONAME(sin6); |
1425 | | return (error); |
1426 | | } |
1427 | | #else |
1428 | | if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) |
1429 | | /* skip ifp check below */ |
1430 | | in6_recoverscope(sin6, &sin6->sin6_addr, NULL); |
1431 | | else |
1432 | | sin6->sin6_scope_id = 0; /* XXX */ |
1433 | | #endif /* SCTP_KAME */ |
1434 | | #endif /* SCTP_EMBEDDED_V6_SCOPE */ |
1435 | | #if !defined(__Userspace__) |
1436 | | (*addr) = (struct sockaddr *)sin6; |
1437 | | #endif |
1438 | 0 | return (0); |
1439 | 0 | } |
1440 | | |
1441 | | static int |
1442 | | #if !defined(__Userspace__) |
1443 | | sctp6_peeraddr(struct socket *so, struct sockaddr **addr) |
1444 | | { |
1445 | | struct sockaddr_in6 *sin6; |
1446 | | #else |
1447 | | sctp6_peeraddr(struct socket *so, struct mbuf *nam) |
1448 | 0 | { |
1449 | 0 | struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); |
1450 | 0 | #endif |
1451 | 0 | int fnd; |
1452 | 0 | struct sockaddr_in6 *sin_a6; |
1453 | 0 | struct sctp_inpcb *inp; |
1454 | 0 | struct sctp_tcb *stcb; |
1455 | 0 | struct sctp_nets *net; |
1456 | | #ifdef SCTP_KAME |
1457 | | int error; |
1458 | | #endif |
1459 | | |
1460 | | /* Do the malloc first in case it blocks. */ |
1461 | | #if !defined(__Userspace__) |
1462 | | SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); |
1463 | | if (sin6 == NULL) |
1464 | | return (ENOMEM); |
1465 | | #else |
1466 | 0 | SCTP_BUF_LEN(nam) = sizeof(*sin6); |
1467 | 0 | memset(sin6, 0, sizeof(*sin6)); |
1468 | 0 | #endif |
1469 | 0 | sin6->sin6_family = AF_INET6; |
1470 | | #ifdef HAVE_SIN6_LEN |
1471 | | sin6->sin6_len = sizeof(*sin6); |
1472 | | #endif |
1473 | |
|
1474 | 0 | inp = (struct sctp_inpcb *)so->so_pcb; |
1475 | 0 | if ((inp == NULL) || |
1476 | 0 | ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) { |
1477 | | /* UDP type and listeners will drop out here */ |
1478 | | #if !defined(__Userspace__) |
1479 | | SCTP_FREE_SONAME(sin6); |
1480 | | #endif |
1481 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOTCONN); |
1482 | 0 | return (ENOTCONN); |
1483 | 0 | } |
1484 | 0 | SCTP_INP_RLOCK(inp); |
1485 | 0 | stcb = LIST_FIRST(&inp->sctp_asoc_list); |
1486 | 0 | if (stcb) { |
1487 | 0 | SCTP_TCB_LOCK(stcb); |
1488 | 0 | } |
1489 | 0 | SCTP_INP_RUNLOCK(inp); |
1490 | 0 | if (stcb == NULL) { |
1491 | | #if !defined(__Userspace__) |
1492 | | SCTP_FREE_SONAME(sin6); |
1493 | | #endif |
1494 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ECONNRESET); |
1495 | 0 | return (ECONNRESET); |
1496 | 0 | } |
1497 | 0 | fnd = 0; |
1498 | 0 | TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { |
1499 | 0 | sin_a6 = (struct sockaddr_in6 *)&net->ro._l_addr; |
1500 | 0 | if (sin_a6->sin6_family == AF_INET6) { |
1501 | 0 | fnd = 1; |
1502 | 0 | sin6->sin6_port = stcb->rport; |
1503 | 0 | sin6->sin6_addr = sin_a6->sin6_addr; |
1504 | 0 | break; |
1505 | 0 | } |
1506 | 0 | } |
1507 | 0 | SCTP_TCB_UNLOCK(stcb); |
1508 | 0 | if (!fnd) { |
1509 | | /* No IPv4 address */ |
1510 | | #if !defined(__Userspace__) |
1511 | | SCTP_FREE_SONAME(sin6); |
1512 | | #endif |
1513 | 0 | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, ENOENT); |
1514 | 0 | return (ENOENT); |
1515 | 0 | } |
1516 | | #ifdef SCTP_EMBEDDED_V6_SCOPE |
1517 | | #ifdef SCTP_KAME |
1518 | | if ((error = sa6_recoverscope(sin6)) != 0) { |
1519 | | #if !defined(__Userspace__) |
1520 | | SCTP_FREE_SONAME(sin6); |
1521 | | #endif |
1522 | | SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, error); |
1523 | | return (error); |
1524 | | } |
1525 | | #else |
1526 | | in6_recoverscope(sin6, &sin6->sin6_addr, NULL); |
1527 | | #endif /* SCTP_KAME */ |
1528 | | #endif /* SCTP_EMBEDDED_V6_SCOPE */ |
1529 | | #if !defined(__Userspace__) |
1530 | | *addr = (struct sockaddr *)sin6; |
1531 | | #endif |
1532 | 0 | return (0); |
1533 | 0 | } |
1534 | | |
1535 | | #if !defined(__Userspace__) |
1536 | | static int |
1537 | | sctp6_in6getaddr(struct socket *so, struct sockaddr **nam) |
1538 | | { |
1539 | | #elif defined(__Userspace__) |
1540 | | int |
1541 | | sctp6_in6getaddr(struct socket *so, struct mbuf *nam) |
1542 | 0 | { |
1543 | 0 | #ifdef INET |
1544 | 0 | struct sockaddr *addr = mtod(nam, struct sockaddr *); |
1545 | 0 | #endif |
1546 | | #else |
1547 | | static int |
1548 | | sctp6_in6getaddr(struct socket *so, struct mbuf *nam) |
1549 | | { |
1550 | | #ifdef INET |
1551 | | struct sockaddr *addr = mtod(nam, struct sockaddr *); |
1552 | | #endif |
1553 | | #endif |
1554 | 0 | struct inpcb *inp = sotoinpcb(so); |
1555 | 0 | int error; |
1556 | |
|
1557 | 0 | if (inp == NULL) { |
1558 | 0 | SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1559 | 0 | return (EINVAL); |
1560 | 0 | } |
1561 | | |
1562 | | /* allow v6 addresses precedence */ |
1563 | 0 | error = sctp6_getaddr(so, nam); |
1564 | 0 | #ifdef INET |
1565 | 0 | if (error) { |
1566 | | #if !defined(__Userspace__) |
1567 | | struct sockaddr_in6 *sin6; |
1568 | | #else |
1569 | 0 | struct sockaddr_in6 sin6; |
1570 | 0 | #endif |
1571 | | |
1572 | | /* try v4 next if v6 failed */ |
1573 | 0 | error = sctp_ingetaddr(so, nam); |
1574 | 0 | if (error) { |
1575 | 0 | return (error); |
1576 | 0 | } |
1577 | | #if !defined(__Userspace__) |
1578 | | SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); |
1579 | | if (sin6 == NULL) { |
1580 | | SCTP_FREE_SONAME(*nam); |
1581 | | return (ENOMEM); |
1582 | | } |
1583 | | in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); |
1584 | | SCTP_FREE_SONAME(*nam); |
1585 | | *nam = (struct sockaddr *)sin6; |
1586 | | #else |
1587 | 0 | in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); |
1588 | 0 | SCTP_BUF_LEN(nam) = sizeof(struct sockaddr_in6); |
1589 | 0 | memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); |
1590 | 0 | #endif |
1591 | 0 | } |
1592 | 0 | #endif |
1593 | 0 | return (error); |
1594 | 0 | } |
1595 | | |
1596 | | #if !defined(__Userspace__) |
1597 | | static int |
1598 | | sctp6_getpeeraddr(struct socket *so, struct sockaddr **nam) |
1599 | | { |
1600 | | #elif defined(__Userspace__) |
1601 | | int |
1602 | | sctp6_getpeeraddr(struct socket *so, struct mbuf *nam) |
1603 | 0 | { |
1604 | 0 | #ifdef INET |
1605 | 0 | struct sockaddr *addr = mtod(nam, struct sockaddr *); |
1606 | 0 | #endif |
1607 | | #else |
1608 | | static |
1609 | | int |
1610 | | sctp6_getpeeraddr(struct socket *so, struct mbuf *nam) |
1611 | | { |
1612 | | #ifdef INET |
1613 | | struct sockaddr *addr = mtod(nam, struct sockaddr *); |
1614 | | #endif |
1615 | | |
1616 | | #endif |
1617 | 0 | struct inpcb *inp = sotoinpcb(so); |
1618 | 0 | int error; |
1619 | |
|
1620 | 0 | if (inp == NULL) { |
1621 | 0 | SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP6_USRREQ, EINVAL); |
1622 | 0 | return (EINVAL); |
1623 | 0 | } |
1624 | | |
1625 | | /* allow v6 addresses precedence */ |
1626 | 0 | error = sctp6_peeraddr(so, nam); |
1627 | 0 | #ifdef INET |
1628 | 0 | if (error) { |
1629 | | #if !defined(__Userspace__) |
1630 | | struct sockaddr_in6 *sin6; |
1631 | | #else |
1632 | 0 | struct sockaddr_in6 sin6; |
1633 | 0 | #endif |
1634 | | |
1635 | | /* try v4 next if v6 failed */ |
1636 | 0 | error = sctp_peeraddr(so, nam); |
1637 | 0 | if (error) { |
1638 | 0 | return (error); |
1639 | 0 | } |
1640 | | #if !defined(__Userspace__) |
1641 | | SCTP_MALLOC_SONAME(sin6, struct sockaddr_in6 *, sizeof *sin6); |
1642 | | if (sin6 == NULL) { |
1643 | | SCTP_FREE_SONAME(*nam); |
1644 | | return (ENOMEM); |
1645 | | } |
1646 | | in6_sin_2_v4mapsin6((struct sockaddr_in *)*nam, sin6); |
1647 | | SCTP_FREE_SONAME(*nam); |
1648 | | *nam = (struct sockaddr *)sin6; |
1649 | | #else |
1650 | 0 | in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6); |
1651 | 0 | SCTP_BUF_LEN(nam) = sizeof(struct sockaddr_in6); |
1652 | 0 | memcpy(addr, &sin6, sizeof(struct sockaddr_in6)); |
1653 | 0 | #endif |
1654 | 0 | } |
1655 | 0 | #endif |
1656 | 0 | return (error); |
1657 | 0 | } |
1658 | | |
1659 | | #if !defined(__Userspace__) |
1660 | | #if defined(__FreeBSD__) |
1661 | | #define SCTP6_PROTOSW \ |
1662 | | .pr_protocol = IPPROTO_SCTP, \ |
1663 | | .pr_ctloutput = sctp_ctloutput, \ |
1664 | | .pr_abort = sctp_abort, \ |
1665 | | .pr_accept = sctp_accept, \ |
1666 | | .pr_attach = sctp6_attach, \ |
1667 | | .pr_bind = sctp6_bind, \ |
1668 | | .pr_connect = sctp6_connect, \ |
1669 | | .pr_control = in6_control, \ |
1670 | | .pr_close = sctp6_close, \ |
1671 | | .pr_detach = sctp6_close, \ |
1672 | | .pr_sopoll = sopoll_generic, \ |
1673 | | .pr_flush = sctp_flush, \ |
1674 | | .pr_disconnect = sctp_disconnect, \ |
1675 | | .pr_listen = sctp_listen, \ |
1676 | | .pr_peeraddr = sctp6_getpeeraddr, \ |
1677 | | .pr_send = sctp6_send, \ |
1678 | | .pr_shutdown = sctp_shutdown, \ |
1679 | | .pr_sockaddr = sctp6_in6getaddr, \ |
1680 | | .pr_sosend = sctp_sosend, \ |
1681 | | .pr_soreceive = sctp_soreceive |
1682 | | |
1683 | | struct protosw sctp6_seqpacket_protosw = { |
1684 | | .pr_type = SOCK_SEQPACKET, |
1685 | | .pr_flags = PR_WANTRCVD, |
1686 | | SCTP6_PROTOSW |
1687 | | }; |
1688 | | |
1689 | | struct protosw sctp6_stream_protosw = { |
1690 | | .pr_type = SOCK_STREAM, |
1691 | | .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD, |
1692 | | SCTP6_PROTOSW |
1693 | | }; |
1694 | | #else |
1695 | | struct pr_usrreqs sctp6_usrreqs = { |
1696 | | #if defined(__APPLE__) && !defined(__Userspace__) |
1697 | | .pru_abort = sctp_abort, |
1698 | | .pru_accept = sctp_accept, |
1699 | | .pru_attach = sctp6_attach, |
1700 | | .pru_bind = sctp6_bind, |
1701 | | .pru_connect = sctp6_connect, |
1702 | | .pru_connect2 = pru_connect2_notsupp, |
1703 | | .pru_control = in6_control, |
1704 | | .pru_detach = sctp6_detach, |
1705 | | .pru_disconnect = sctp_disconnect, |
1706 | | .pru_listen = sctp_listen, |
1707 | | .pru_peeraddr = sctp6_getpeeraddr, |
1708 | | .pru_rcvd = NULL, |
1709 | | .pru_rcvoob = pru_rcvoob_notsupp, |
1710 | | .pru_send = sctp6_send, |
1711 | | .pru_sense = pru_sense_null, |
1712 | | .pru_shutdown = sctp_shutdown, |
1713 | | .pru_sockaddr = sctp6_in6getaddr, |
1714 | | .pru_sosend = sctp_sosend, |
1715 | | .pru_soreceive = sctp_soreceive, |
1716 | | .pru_sopoll = sopoll |
1717 | | #elif defined(_WIN32) && !defined(__Userspace__) |
1718 | | sctp_abort, |
1719 | | sctp_accept, |
1720 | | sctp6_attach, |
1721 | | sctp6_bind, |
1722 | | sctp6_connect, |
1723 | | pru_connect2_notsupp, |
1724 | | NULL, |
1725 | | NULL, |
1726 | | sctp_disconnect, |
1727 | | sctp_listen, |
1728 | | sctp6_getpeeraddr, |
1729 | | NULL, |
1730 | | pru_rcvoob_notsupp, |
1731 | | NULL, |
1732 | | pru_sense_null, |
1733 | | sctp_shutdown, |
1734 | | sctp_flush, |
1735 | | sctp6_in6getaddr, |
1736 | | sctp_sosend, |
1737 | | sctp_soreceive, |
1738 | | sopoll_generic, |
1739 | | NULL, |
1740 | | sctp6_close |
1741 | | }; |
1742 | | #endif |
1743 | | #endif |
1744 | | #endif |
1745 | | #endif |