1 /*
2 * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include <windows.h>
27 #include <winsock2.h>
28 #include "jni.h"
29 #include "jni_util.h"
30 #include "jvm.h"
31 #include "jlong.h"
32
33 #include "nio.h"
34 #include "nio_util.h"
35 #include "net_util.h"
36
37 #include "sun_nio_ch_Net.h"
38 #include "sun_nio_ch_PollArrayWrapper.h"
39
40 /**
41 * Definitions to allow for building with older SDK include files.
42 */
43
44 #ifndef MCAST_BLOCK_SOURCE
45
46 #define MCAST_BLOCK_SOURCE 43
47 #define MCAST_UNBLOCK_SOURCE 44
48 #define MCAST_JOIN_SOURCE_GROUP 45
49 #define MCAST_LEAVE_SOURCE_GROUP 46
50
51 #endif /* MCAST_BLOCK_SOURCE */
52
53 struct my_ip_mreq_source {
54 IN_ADDR imr_multiaddr;
55 IN_ADDR imr_sourceaddr;
56 IN_ADDR imr_interface;
57 };
58
59 struct my_group_source_req {
60 ULONG gsr_interface;
61 SOCKADDR_STORAGE gsr_group;
62 SOCKADDR_STORAGE gsr_source;
63 };
64
65 /**
66 * Copy IPv6 address as jbytearray to target
67 */
68 #define COPY_INET6_ADDRESS(env, source, target) \
69 (*env)->GetByteArrayRegion(env, source, 0, 16, target)
70
71 /**
72 * Enable or disable receipt of WSAECONNRESET errors.
73 */
74 static void setConnectionReset(SOCKET s, BOOL enable) {
75 DWORD bytesReturned = 0;
76 WSAIoctl(s, SIO_UDP_CONNRESET, &enable, sizeof(enable),
77 NULL, 0, &bytesReturned, NULL, NULL);
78 }
79
80
81 JNIEXPORT void JNICALL
82 Java_sun_nio_ch_Net_initIDs(JNIEnv *env, jclass clazz)
83 {
84 initInetAddressIDs(env);
85 }
86
87 JNIEXPORT jboolean JNICALL
88 Java_sun_nio_ch_Net_isIPv6Available0(JNIEnv* env, jclass cl)
89 {
90 /*
91 * Return true if IPv6 is configured
92 */
93 return ipv6_available() ? JNI_TRUE : JNI_FALSE;
94 }
95
96 JNIEXPORT jboolean JNICALL
97 Java_sun_nio_ch_Net_isReusePortAvailable0(JNIEnv* env, jclass c1)
98 {
99 // SO_REUSEPORT is not supported on Windows
100 return JNI_FALSE;
101 }
102
103 JNIEXPORT jint JNICALL
104 Java_sun_nio_ch_Net_isExclusiveBindAvailable(JNIEnv *env, jclass clazz) {
105 return 1;
106 }
107
108
109 JNIEXPORT jboolean JNICALL
110 Java_sun_nio_ch_Net_canIPv6SocketJoinIPv4Group0(JNIEnv* env, jclass cl)
111 {
112 return JNI_FALSE;
113 }
114
115 JNIEXPORT jboolean JNICALL
116 Java_sun_nio_ch_Net_canJoin6WithIPv4Group0(JNIEnv* env, jclass cl)
117 {
118 return JNI_FALSE;
119 }
120
121 JNIEXPORT jint JNICALL
122 Java_sun_nio_ch_Net_socket0(JNIEnv *env, jclass cl, jboolean preferIPv6,
123 jboolean stream, jboolean reuse, jboolean fastLoopback)
124 {
125 SOCKET s;
126 int domain = (preferIPv6) ? AF_INET6 : AF_INET;
127
128 s = socket(domain, (stream ? SOCK_STREAM : SOCK_DGRAM), 0);
129 if (s != INVALID_SOCKET) {
130 SetHandleInformation((HANDLE)s, HANDLE_FLAG_INHERIT, 0);
131
132 /* IPV6_V6ONLY is true by default */
133 if (domain == AF_INET6) {
134 int opt = 0;
135 setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
136 (const char *)&opt, sizeof(opt));
137 }
138
139 /* Disable WSAECONNRESET errors for initially unconnected UDP sockets */
140 if (!stream) {
141 setConnectionReset(s, FALSE);
142 }
143
144 } else {
145 NET_ThrowNew(env, WSAGetLastError(), "socket");
146 }
147
148 if (stream && fastLoopback) {
149 static int loopback_available = 1;
150 if (loopback_available) {
151 int rv = NET_EnableFastTcpLoopback((jint)s);
152 if (rv) {
153 if (rv == WSAEOPNOTSUPP) {
154 loopback_available = 0;
155 } else {
156 NET_ThrowNew(env, rv, "fastLoopback");
157 }
158 }
159 }
160 }
161
162 return (jint)s;
163 }
164
165 JNIEXPORT void JNICALL
166 Java_sun_nio_ch_Net_bind0(JNIEnv *env, jclass clazz, jobject fdo, jboolean preferIPv6,
167 jboolean isExclBind, jobject iao, jint port)
168 {
169 SOCKETADDRESS sa;
170 int rv;
171 int sa_len = 0;
172
173 if (NET_InetAddressToSockaddr(env, iao, port, &sa, &sa_len, preferIPv6) != 0) {
174 return;
175 }
176
177 rv = NET_WinBind(fdval(env, fdo), &sa, sa_len, isExclBind);
178 if (rv == SOCKET_ERROR)
179 NET_ThrowNew(env, WSAGetLastError(), "bind");
180 }
181
182 JNIEXPORT void JNICALL
183 Java_sun_nio_ch_Net_listen(JNIEnv *env, jclass cl, jobject fdo, jint backlog)
184 {
185 if (listen(fdval(env,fdo), backlog) == SOCKET_ERROR) {
186 NET_ThrowNew(env, WSAGetLastError(), "listen");
187 }
188 }
189
190
191 JNIEXPORT jint JNICALL
192 Java_sun_nio_ch_Net_connect0(JNIEnv *env, jclass clazz, jboolean preferIPv6, jobject fdo,
193 jobject iao, jint port)
194 {
195 SOCKETADDRESS sa;
196 int rv;
197 int sa_len = 0;
198 SOCKET s = (SOCKET)fdval(env, fdo);
199
200 if (NET_InetAddressToSockaddr(env, iao, port, &sa, &sa_len, preferIPv6) != 0) {
201 return IOS_THROWN;
202 }
203
204 rv = connect(s, &sa.sa, sa_len);
205 if (rv != 0) {
206 int err = WSAGetLastError();
207 if (err == WSAEINPROGRESS || err == WSAEWOULDBLOCK) {
208 return IOS_UNAVAILABLE;
209 }
210 NET_ThrowNew(env, err, "connect");
211 return IOS_THROWN;
212 } else {
213 /* Enable WSAECONNRESET errors when a UDP socket is connected */
214 int type = 0, optlen = sizeof(type);
215 rv = getsockopt(s, SOL_SOCKET, SO_TYPE, (char*)&type, &optlen);
216 if (rv == 0 && type == SOCK_DGRAM) {
217 setConnectionReset(s, TRUE);
218 }
219 }
220 return 1;
221 }
222
223 JNIEXPORT jint JNICALL
224 Java_sun_nio_ch_Net_localPort(JNIEnv *env, jclass clazz, jobject fdo)
225 {
226 SOCKETADDRESS sa;
227 int sa_len = sizeof(sa);
228
229 if (getsockname(fdval(env, fdo), &sa.sa, &sa_len) < 0) {
230 int error = WSAGetLastError();
231 if (error == WSAEINVAL) {
232 return 0;
233 }
234 NET_ThrowNew(env, error, "getsockname");
235 return IOS_THROWN;
236 }
237 return NET_GetPortFromSockaddr(&sa);
238 }
239
240 JNIEXPORT jobject JNICALL
241 Java_sun_nio_ch_Net_localInetAddress(JNIEnv *env, jclass clazz, jobject fdo)
242 {
243 SOCKETADDRESS sa;
244 int sa_len = sizeof(sa);
245 int port;
246
247 if (getsockname(fdval(env, fdo), &sa.sa, &sa_len) < 0) {
248 NET_ThrowNew(env, WSAGetLastError(), "getsockname");
249 return NULL;
250 }
251 return NET_SockaddrToInetAddress(env, &sa, &port);
252 }
253
254 JNIEXPORT jint JNICALL
255 Java_sun_nio_ch_Net_remotePort(JNIEnv *env, jclass clazz, jobject fdo)
256 {
257 SOCKETADDRESS sa;
258 int sa_len = sizeof(sa);
259
260 if (getpeername(fdval(env, fdo), &sa.sa, &sa_len) < 0) {
261 int error = WSAGetLastError();
262 if (error == WSAEINVAL) {
263 return 0;
264 }
265 NET_ThrowNew(env, error, "getsockname");
266 return IOS_THROWN;
267 }
268 return NET_GetPortFromSockaddr(&sa);
269 }
270
271 JNIEXPORT jobject JNICALL
272 Java_sun_nio_ch_Net_remoteInetAddress(JNIEnv *env, jclass clazz, jobject fdo)
273 {
274 SOCKETADDRESS sa;
275 int sa_len = sizeof(sa);
276 int port;
277
278 if (getpeername(fdval(env, fdo), &sa.sa, &sa_len) < 0) {
279 NET_ThrowNew(env, WSAGetLastError(), "getsockname");
280 return NULL;
281 }
282 return NET_SockaddrToInetAddress(env, &sa, &port);
283 }
284
285 JNIEXPORT jint JNICALL
286 Java_sun_nio_ch_Net_getIntOption0(JNIEnv *env, jclass clazz, jobject fdo,
287 jboolean mayNeedConversion, jint level, jint opt)
288 {
289 int result = 0;
290 struct linger linger;
291 char *arg;
292 int arglen, n;
293
294 if (level == SOL_SOCKET && opt == SO_LINGER) {
295 arg = (char *)&linger;
296 arglen = sizeof(linger);
297 } else {
298 arg = (char *)&result;
299 arglen = sizeof(result);
300 }
301
302 /**
303 * HACK: IP_TOS is deprecated on Windows and querying the option
304 * returns a protocol error. NET_GetSockOpt handles this and uses
305 * a fallback mechanism. Same applies to IPV6_TCLASS
306 */
307 if ((level == IPPROTO_IP && opt == IP_TOS) || (level == IPPROTO_IPV6 && opt == IPV6_TCLASS)) {
308 mayNeedConversion = JNI_TRUE;
309 }
310
311 if (mayNeedConversion) {
312 n = NET_GetSockOpt(fdval(env, fdo), level, opt, arg, &arglen);
313 } else {
314 n = getsockopt(fdval(env, fdo), level, opt, arg, &arglen);
315 }
316 if (n < 0) {
317 handleSocketError(env, WSAGetLastError());
318 return IOS_THROWN;
319 }
320
321 if (level == SOL_SOCKET && opt == SO_LINGER)
322 return linger.l_onoff ? linger.l_linger : -1;
323 else
324 return result;
325 }
326
327 JNIEXPORT void JNICALL
328 Java_sun_nio_ch_Net_setIntOption0(JNIEnv *env, jclass clazz, jobject fdo,
329 jboolean mayNeedConversion, jint level, jint opt, jint arg, jboolean ipv6)
330 {
331 struct linger linger;
332 char *parg;
333 int arglen, n;
334
335 if (level == SOL_SOCKET && opt == SO_LINGER) {
336 parg = (char *)&linger;
337 arglen = sizeof(linger);
338 if (arg >= 0) {
339 linger.l_onoff = 1;
340 linger.l_linger = (unsigned short)arg;
341 } else {
342 linger.l_onoff = 0;
343 linger.l_linger = 0;
344 }
345 } else {
346 parg = (char *)&arg;
347 arglen = sizeof(arg);
348 }
349
350 if (level == IPPROTO_IPV6 && opt == IPV6_TCLASS) {
351 /* No op */
352 return;
353 }
354
355 if (mayNeedConversion) {
356 n = NET_SetSockOpt(fdval(env, fdo), level, opt, parg, arglen);
357 } else {
358 n = setsockopt(fdval(env, fdo), level, opt, parg, arglen);
359 }
360 if (n < 0)
361 handleSocketError(env, WSAGetLastError());
362 }
363
364 JNIEXPORT jint JNICALL
365 Java_sun_nio_ch_Net_joinOrDrop4(JNIEnv *env, jobject this, jboolean join, jobject fdo,
366 jint group, jint interf, jint source)
367 {
368 struct ip_mreq mreq;
369 struct my_ip_mreq_source mreq_source;
370 int opt, n, optlen;
371 void* optval;
372
373 if (source == 0) {
374 mreq.imr_multiaddr.s_addr = htonl(group);
375 mreq.imr_interface.s_addr = htonl(interf);
376 opt = (join) ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP;
377 optval = (void*)&mreq;
378 optlen = sizeof(mreq);
379 } else {
380 mreq_source.imr_multiaddr.s_addr = htonl(group);
381 mreq_source.imr_sourceaddr.s_addr = htonl(source);
382 mreq_source.imr_interface.s_addr = htonl(interf);
383 opt = (join) ? IP_ADD_SOURCE_MEMBERSHIP : IP_DROP_SOURCE_MEMBERSHIP;
384 optval = (void*)&mreq_source;
385 optlen = sizeof(mreq_source);
386 }
387
388 n = setsockopt(fdval(env,fdo), IPPROTO_IP, opt, optval, optlen);
389 if (n < 0) {
390 if (join && (WSAGetLastError() == WSAENOPROTOOPT))
391 return IOS_UNAVAILABLE;
392 handleSocketError(env, WSAGetLastError());
393 }
394 return 0;
395 }
396
397 JNIEXPORT jint JNICALL
398 Java_sun_nio_ch_Net_blockOrUnblock4(JNIEnv *env, jobject this, jboolean block, jobject fdo,
399 jint group, jint interf, jint source)
400 {
401 struct my_ip_mreq_source mreq_source;
402 int n;
403 int opt = (block) ? IP_BLOCK_SOURCE : IP_UNBLOCK_SOURCE;
404
405 mreq_source.imr_multiaddr.s_addr = htonl(group);
406 mreq_source.imr_sourceaddr.s_addr = htonl(source);
407 mreq_source.imr_interface.s_addr = htonl(interf);
408
409 n = setsockopt(fdval(env,fdo), IPPROTO_IP, opt,
410 (void*)&mreq_source, sizeof(mreq_source));
411 if (n < 0) {
412 if (block && (WSAGetLastError() == WSAENOPROTOOPT))
413 return IOS_UNAVAILABLE;
414 handleSocketError(env, WSAGetLastError());
415 }
416 return 0;
417 }
418
419 /**
420 * Call setsockopt with a IPPROTO_IPV6 level socket option
421 * and a group_source_req structure as the option value. The
422 * given IPv6 group, interface index, and IPv6 source address
423 * are copied into the structure.
424 */
425 static int setGroupSourceReqOption(JNIEnv* env,
426 jobject fdo,
427 int opt,
428 jbyteArray group,
429 jint index,
430 jbyteArray source)
431 {
432 struct my_group_source_req req;
433 struct sockaddr_in6* sin6;
434
435 req.gsr_interface = (ULONG)index;
436
437 sin6 = (struct sockaddr_in6*)&(req.gsr_group);
438 sin6->sin6_family = AF_INET6;
439 COPY_INET6_ADDRESS(env, group, (jbyte*)&(sin6->sin6_addr));
440
441 sin6 = (struct sockaddr_in6*)&(req.gsr_source);
442 sin6->sin6_family = AF_INET6;
443 COPY_INET6_ADDRESS(env, source, (jbyte*)&(sin6->sin6_addr));
444
445 return setsockopt(fdval(env,fdo), IPPROTO_IPV6, opt, (void*)&req, sizeof(req));
446 }
447
448 JNIEXPORT jint JNICALL
449 Java_sun_nio_ch_Net_joinOrDrop6(JNIEnv *env, jobject this, jboolean join, jobject fdo,
450 jbyteArray group, jint index, jbyteArray source)
451 {
452 struct ipv6_mreq mreq6;
453 int n;
454
455 if (source == NULL) {
456 int opt = (join) ? IPV6_ADD_MEMBERSHIP : IPV6_DROP_MEMBERSHIP;
457 COPY_INET6_ADDRESS(env, group, (jbyte*)&(mreq6.ipv6mr_multiaddr));
458 mreq6.ipv6mr_interface = (int)index;
459 n = setsockopt(fdval(env,fdo), IPPROTO_IPV6, opt,
460 (void*)&mreq6, sizeof(mreq6));
461 } else {
462 int opt = (join) ? MCAST_JOIN_SOURCE_GROUP : MCAST_LEAVE_SOURCE_GROUP;
463 n = setGroupSourceReqOption(env, fdo, opt, group, index, source);
464 }
465
466 if (n < 0) {
467 handleSocketError(env, errno);
468 }
469 return 0;
470 }
471
472 JNIEXPORT jint JNICALL
473 Java_sun_nio_ch_Net_blockOrUnblock6(JNIEnv *env, jobject this, jboolean block, jobject fdo,
474 jbyteArray group, jint index, jbyteArray source)
475 {
476 int opt = (block) ? MCAST_BLOCK_SOURCE : MCAST_UNBLOCK_SOURCE;
477 int n = setGroupSourceReqOption(env, fdo, opt, group, index, source);
478 if (n < 0) {
479 handleSocketError(env, errno);
480 }
481 return 0;
482 }
483
484 JNIEXPORT void JNICALL
485 Java_sun_nio_ch_Net_setInterface4(JNIEnv* env, jobject this, jobject fdo, jint interf)
486 {
487 struct in_addr in;
488 int arglen = sizeof(struct in_addr);
489 int n;
490
491 in.s_addr = htonl(interf);
492
493 n = setsockopt(fdval(env, fdo), IPPROTO_IP, IP_MULTICAST_IF,
494 (void*)&(in.s_addr), arglen);
495 if (n < 0) {
496 handleSocketError(env, WSAGetLastError());
497 }
498 }
499
500 JNIEXPORT jint JNICALL
501 Java_sun_nio_ch_Net_getInterface4(JNIEnv* env, jobject this, jobject fdo)
502 {
503 struct in_addr in;
504 int arglen = sizeof(struct in_addr);
505 int n;
506
507 n = getsockopt(fdval(env, fdo), IPPROTO_IP, IP_MULTICAST_IF, (void*)&in, &arglen);
508 if (n < 0) {
509 handleSocketError(env, WSAGetLastError());
510 return IOS_THROWN;
511 }
512 return ntohl(in.s_addr);
513 }
514
515 JNIEXPORT void JNICALL
516 Java_sun_nio_ch_Net_setInterface6(JNIEnv* env, jobject this, jobject fdo, jint index)
517 {
518 int value = (jint)index;
519 int arglen = sizeof(value);
520 int n;
521
522 n = setsockopt(fdval(env, fdo), IPPROTO_IPV6, IPV6_MULTICAST_IF,
523 (void*)&(index), arglen);
524 if (n < 0) {
525 handleSocketError(env, errno);
526 }
527 }
528
529 JNIEXPORT jint JNICALL
530 Java_sun_nio_ch_Net_getInterface6(JNIEnv* env, jobject this, jobject fdo)
531 {
532 int index;
533 int arglen = sizeof(index);
534 int n;
535
536 n = getsockopt(fdval(env, fdo), IPPROTO_IPV6, IPV6_MULTICAST_IF, (void*)&index, &arglen);
537 if (n < 0) {
538 handleSocketError(env, errno);
539 return -1;
540 }
541 return (jint)index;
542 }
543
544 JNIEXPORT void JNICALL
545 Java_sun_nio_ch_Net_shutdown(JNIEnv *env, jclass cl, jobject fdo, jint jhow) {
546 int how = (jhow == sun_nio_ch_Net_SHUT_RD) ? SD_RECEIVE :
547 (jhow == sun_nio_ch_Net_SHUT_WR) ? SD_SEND : SD_BOTH;
548 if (shutdown(fdval(env, fdo), how) == SOCKET_ERROR) {
549 NET_ThrowNew(env, WSAGetLastError(), "shutdown");
550 }
551 }
552
553 JNIEXPORT jint JNICALL
554 Java_sun_nio_ch_Net_poll(JNIEnv* env, jclass this, jobject fdo, jint events, jlong timeout)
555 {
556 int rv;
557 int revents = 0;
558 struct timeval t;
559 int lastError = 0;
560 fd_set rd, wr, ex;
561 jint fd = fdval(env, fdo);
562
563 t.tv_sec = (long)(timeout / 1000);
564 t.tv_usec = (timeout % 1000) * 1000;
565
566 FD_ZERO(&rd);
567 FD_ZERO(&wr);
568 FD_ZERO(&ex);
569 if (events & POLLIN) {
570 FD_SET(fd, &rd);
571 }
572 if (events & POLLOUT ||
573 events & POLLCONN) {
574 FD_SET(fd, &wr);
575 }
576 FD_SET(fd, &ex);
577
578 rv = select(fd+1, &rd, &wr, &ex, &t);
579
580 /* save last winsock error */
581 if (rv == SOCKET_ERROR) {
582 handleSocketError(env, lastError);
583 return IOS_THROWN;
584 } else if (rv >= 0) {
585 rv = 0;
586 if (FD_ISSET(fd, &rd)) {
587 rv |= POLLIN;
588 }
589 if (FD_ISSET(fd, &wr)) {
590 rv |= POLLOUT;
591 }
592 if (FD_ISSET(fd, &ex)) {
593 rv |= POLLERR;
594 }
595 }
596 return rv;
597 }
598
599 JNIEXPORT jshort JNICALL
600 Java_sun_nio_ch_Net_pollinValue(JNIEnv *env, jclass this)
601 {
602 return (jshort)POLLIN;
603 }
604
605 JNIEXPORT jshort JNICALL
606 Java_sun_nio_ch_Net_polloutValue(JNIEnv *env, jclass this)
607 {
608 return (jshort)POLLOUT;
609 }
610
611 JNIEXPORT jshort JNICALL
612 Java_sun_nio_ch_Net_pollerrValue(JNIEnv *env, jclass this)
613 {
614 return (jshort)POLLERR;
615 }
616
617 JNIEXPORT jshort JNICALL
618 Java_sun_nio_ch_Net_pollhupValue(JNIEnv *env, jclass this)
619 {
620 return (jshort)POLLHUP;
621 }
622
623 JNIEXPORT jshort JNICALL
624 Java_sun_nio_ch_Net_pollnvalValue(JNIEnv *env, jclass this)
625 {
626 return (jshort)POLLNVAL;
627 }
628
629 JNIEXPORT jshort JNICALL
630 Java_sun_nio_ch_Net_pollconnValue(JNIEnv *env, jclass this)
631 {
632 return (jshort)POLLCONN;
633 }