1 /*
2 * Copyright (c) 1997, 2018, 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 #include <errno.h>
26
27 #include "jvm.h"
28 #include "net_util.h"
29
30 #include "java_net_SocketOptions.h"
31 #include "java_net_PlainSocketImpl.h"
32
33 /************************************************************************
34 * PlainSocketImpl
35 */
36
37 static jfieldID IO_fd_fdID;
38
39 jfieldID psi_fdID;
40 jfieldID psi_addressID;
41 jfieldID psi_ipaddressID;
42 jfieldID psi_portID;
43 jfieldID psi_localportID;
44 jfieldID psi_timeoutID;
45 jfieldID psi_trafficClassID;
46 jfieldID psi_serverSocketID;
47 jfieldID psi_fdLockID;
48 jfieldID psi_closePendingID;
49
50 extern void setDefaultScopeID(JNIEnv *env, struct sockaddr *him);
51
52 /*
53 * file descriptor used for dup2
54 */
55 static int marker_fd = -1;
56
57
58 #define SET_NONBLOCKING(fd) { \
59 int flags = fcntl(fd, F_GETFL); \
60 flags |= O_NONBLOCK; \
61 fcntl(fd, F_SETFL, flags); \
62 }
63
64 #define SET_BLOCKING(fd) { \
65 int flags = fcntl(fd, F_GETFL); \
66 flags &= ~O_NONBLOCK; \
67 fcntl(fd, F_SETFL, flags); \
68 }
69
70 /*
71 * Create the marker file descriptor by establishing a loopback connection
72 * which we shutdown but do not close the fd. The result is an fd that
73 * can be used for read/write.
74 */
75 static int getMarkerFD()
76 {
77 int sv[2];
78
79 #ifdef AF_UNIX
80 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) {
81 return -1;
82 }
83 #else
84 return -1;
85 #endif
86
87 /*
88 * Finally shutdown sv[0] (any reads to this fd will get
89 * EOF; any writes will get an error).
90 */
91 shutdown(sv[0], 2);
92 close(sv[1]);
93
94 return sv[0];
95 }
96
97 /*
98 * Return the file descriptor given a PlainSocketImpl
99 */
100 static int getFD(JNIEnv *env, jobject this) {
101 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
102 CHECK_NULL_RETURN(fdObj, -1);
103 return (*env)->GetIntField(env, fdObj, IO_fd_fdID);
104 }
105
106 /*
107 * The initroto function is called whenever PlainSocketImpl is
108 * loaded, to cache field IDs for efficiency. This is called every time
109 * the Java class is loaded.
110 *
111 * Class: java_net_PlainSocketImpl
112 * Method: initProto
113 * Signature: ()V
114 */
115 JNIEXPORT void JNICALL
116 Java_java_net_PlainSocketImpl_initProto(JNIEnv *env, jclass cls) {
117 psi_fdID = (*env)->GetFieldID(env, cls , "fd",
118 "Ljava/io/FileDescriptor;");
119 CHECK_NULL(psi_fdID);
120 psi_addressID = (*env)->GetFieldID(env, cls, "address",
121 "Ljava/net/InetAddress;");
122 CHECK_NULL(psi_addressID);
123 psi_portID = (*env)->GetFieldID(env, cls, "port", "I");
124 CHECK_NULL(psi_portID);
125 psi_localportID = (*env)->GetFieldID(env, cls, "localport", "I");
126 CHECK_NULL(psi_localportID);
127 psi_timeoutID = (*env)->GetFieldID(env, cls, "timeout", "I");
128 CHECK_NULL(psi_timeoutID);
129 psi_trafficClassID = (*env)->GetFieldID(env, cls, "trafficClass", "I");
130 CHECK_NULL(psi_trafficClassID);
131 psi_serverSocketID = (*env)->GetFieldID(env, cls, "serverSocket",
132 "Ljava/net/ServerSocket;");
133 CHECK_NULL(psi_serverSocketID);
134 psi_fdLockID = (*env)->GetFieldID(env, cls, "fdLock",
135 "Ljava/lang/Object;");
136 CHECK_NULL(psi_fdLockID);
137 psi_closePendingID = (*env)->GetFieldID(env, cls, "closePending", "Z");
138 CHECK_NULL(psi_closePendingID);
139 IO_fd_fdID = NET_GetFileDescriptorID(env);
140 CHECK_NULL(IO_fd_fdID);
141
142 initInetAddressIDs(env);
143 JNU_CHECK_EXCEPTION(env);
144
145 /* Create the marker fd used for dup2 */
146 marker_fd = getMarkerFD();
147 }
148
149 /* a global reference to the java.net.SocketException class. In
150 * socketCreate, we ensure that this is initialized. This is to
151 * prevent the problem where socketCreate runs out of file
152 * descriptors, and is then unable to load the exception class.
153 */
154 static jclass socketExceptionCls;
155
156 /*
157 * Class: java_net_PlainSocketImpl
158 * Method: socketCreate
159 * Signature: (Z)V */
160 JNIEXPORT void JNICALL
161 Java_java_net_PlainSocketImpl_socketCreate(JNIEnv *env, jobject this,
162 jboolean stream) {
163 jobject fdObj, ssObj;
164 int fd;
165 int type = (stream ? SOCK_STREAM : SOCK_DGRAM);
166 int domain = ipv6_available() ? AF_INET6 : AF_INET;
167
168 if (socketExceptionCls == NULL) {
169 jclass c = (*env)->FindClass(env, "java/net/SocketException");
170 CHECK_NULL(c);
171 socketExceptionCls = (jclass)(*env)->NewGlobalRef(env, c);
172 CHECK_NULL(socketExceptionCls);
173 }
174 fdObj = (*env)->GetObjectField(env, this, psi_fdID);
175
176 if (fdObj == NULL) {
177 (*env)->ThrowNew(env, socketExceptionCls, "null fd object");
178 return;
179 }
180
181 if ((fd = socket(domain, type, 0)) == -1) {
182 /* note: if you run out of fds, you may not be able to load
183 * the exception class, and get a NoClassDefFoundError
184 * instead.
185 */
186 NET_ThrowNew(env, errno, "can't create socket");
187 return;
188 }
189
190 /* Disable IPV6_V6ONLY to ensure dual-socket support */
191 if (domain == AF_INET6) {
192 int arg = 0;
193 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&arg,
194 sizeof(int)) < 0) {
195 NET_ThrowNew(env, errno, "cannot set IPPROTO_IPV6");
196 close(fd);
197 return;
198 }
199 }
200
201 /*
202 * If this is a server socket then enable SO_REUSEADDR
203 * automatically and set to non blocking.
204 */
205 ssObj = (*env)->GetObjectField(env, this, psi_serverSocketID);
206 if (ssObj != NULL) {
207 int arg = 1;
208 SET_NONBLOCKING(fd);
209 if (NET_SetSockOpt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&arg,
210 sizeof(arg)) < 0) {
211 NET_ThrowNew(env, errno, "cannot set SO_REUSEADDR");
212 close(fd);
213 return;
214 }
215 }
216
217 (*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
218 }
219
220 /*
221 * inetAddress is the address object passed to the socket connect
222 * call.
223 *
224 * Class: java_net_PlainSocketImpl
225 * Method: socketConnect
226 * Signature: (Ljava/net/InetAddress;I)V
227 */
228 JNIEXPORT void JNICALL
229 Java_java_net_PlainSocketImpl_socketConnect(JNIEnv *env, jobject this,
230 jobject iaObj, jint port,
231 jint timeout)
232 {
233 jint localport = (*env)->GetIntField(env, this, psi_localportID);
234 int len = 0;
235 /* fdObj is the FileDescriptor field on this */
236 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
237
238 jclass clazz = (*env)->GetObjectClass(env, this);
239
240 jobject fdLock;
241
242 jint trafficClass = (*env)->GetIntField(env, this, psi_trafficClassID);
243
244 /* fd is an int field on iaObj */
245 jint fd;
246
247 SOCKETADDRESS sa;
248 /* The result of the connection */
249 int connect_rv = -1;
250
251 if (IS_NULL(fdObj)) {
252 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
253 return;
254 } else {
255 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
256 }
257 if (IS_NULL(iaObj)) {
258 JNU_ThrowNullPointerException(env, "inet address argument null.");
259 return;
260 }
261
262 /* connect */
263 if (NET_InetAddressToSockaddr(env, iaObj, port, &sa, &len,
264 JNI_TRUE) != 0) {
265 return;
266 }
267 setDefaultScopeID(env, &sa.sa);
268
269 if (trafficClass != 0 && ipv6_available()) {
270 NET_SetTrafficClass(&sa, trafficClass);
271 }
272
273 if (timeout <= 0) {
274 connect_rv = NET_Connect(fd, &sa.sa, len);
275 #ifdef __solaris__
276 if (connect_rv == -1 && errno == EINPROGRESS ) {
277
278 /* This can happen if a blocking connect is interrupted by a signal.
279 * See 6343810.
280 */
281 while (1) {
282 struct pollfd pfd;
283 pfd.fd = fd;
284 pfd.events = POLLOUT;
285
286 connect_rv = NET_Poll(&pfd, 1, -1);
287
288 if (connect_rv == -1) {
289 if (errno == EINTR) {
290 continue;
291 } else {
292 break;
293 }
294 }
295 if (connect_rv > 0) {
296 socklen_t optlen;
297 /* has connection been established */
298 optlen = sizeof(connect_rv);
299 if (getsockopt(fd, SOL_SOCKET, SO_ERROR,
300 (void*)&connect_rv, &optlen) <0) {
301 connect_rv = errno;
302 }
303
304 if (connect_rv != 0) {
305 /* restore errno */
306 errno = connect_rv;
307 connect_rv = -1;
308 }
309 break;
310 }
311 }
312 }
313 #endif
314 } else {
315 /*
316 * A timeout was specified. We put the socket into non-blocking
317 * mode, connect, and then wait for the connection to be
318 * established, fail, or timeout.
319 */
320 SET_NONBLOCKING(fd);
321
322 /* no need to use NET_Connect as non-blocking */
323 connect_rv = connect(fd, &sa.sa, len);
324
325 /* connection not established immediately */
326 if (connect_rv != 0) {
327 socklen_t optlen;
328 jlong nanoTimeout = (jlong) timeout * NET_NSEC_PER_MSEC;
329 jlong prevNanoTime = JVM_NanoTime(env, 0);
330
331 if (errno != EINPROGRESS) {
332 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
333 "connect failed");
334 SET_BLOCKING(fd);
335 return;
336 }
337
338 /*
339 * Wait for the connection to be established or a
340 * timeout occurs. poll needs to handle EINTR in
341 * case lwp sig handler redirects any process signals to
342 * this thread.
343 */
344 while (1) {
345 jlong newNanoTime;
346 struct pollfd pfd;
347 pfd.fd = fd;
348 pfd.events = POLLOUT;
349
350 errno = 0;
351 connect_rv = NET_Poll(&pfd, 1, nanoTimeout / NET_NSEC_PER_MSEC);
352
353 if (connect_rv >= 0) {
354 break;
355 }
356 if (errno != EINTR) {
357 break;
358 }
359
360 /*
361 * The poll was interrupted so adjust timeout and
362 * restart
363 */
364 newNanoTime = JVM_NanoTime(env, 0);
365 nanoTimeout -= (newNanoTime - prevNanoTime);
366 if (nanoTimeout < NET_NSEC_PER_MSEC) {
367 connect_rv = 0;
368 break;
369 }
370 prevNanoTime = newNanoTime;
371
372 } /* while */
373
374 if (connect_rv == 0) {
375 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
376 "connect timed out");
377
378 /*
379 * Timeout out but connection may still be established.
380 * At the high level it should be closed immediately but
381 * just in case we make the socket blocking again and
382 * shutdown input & output.
383 */
384 SET_BLOCKING(fd);
385 shutdown(fd, 2);
386 return;
387 }
388
389 /* has connection been established */
390 optlen = sizeof(connect_rv);
391 if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&connect_rv,
392 &optlen) <0) {
393 connect_rv = errno;
394 }
395 }
396
397 /* make socket blocking again */
398 SET_BLOCKING(fd);
399
400 /* restore errno */
401 if (connect_rv != 0) {
402 errno = connect_rv;
403 connect_rv = -1;
404 }
405 }
406
407 /* report the appropriate exception */
408 if (connect_rv < 0) {
409
410 #ifdef __linux__
411 /*
412 * Linux/GNU distribution setup /etc/hosts so that
413 * InetAddress.getLocalHost gets back the loopback address
414 * rather than the host address. Thus a socket can be
415 * bound to the loopback address and the connect will
416 * fail with EADDRNOTAVAIL. In addition the Linux kernel
417 * returns the wrong error in this case - it returns EINVAL
418 * instead of EADDRNOTAVAIL. We handle this here so that
419 * a more descriptive exception text is used.
420 */
421 if (connect_rv == -1 && errno == EINVAL) {
422 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
423 "Invalid argument or cannot assign requested address");
424 return;
425 }
426 #endif
427 #if defined(EPROTO)
428 if (errno == EPROTO) {
429 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ProtocolException",
430 "Protocol error");
431 return;
432 }
433 #endif
434 if (errno == ECONNREFUSED) {
435 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
436 "Connection refused");
437 } else if (errno == ETIMEDOUT) {
438 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
439 "Connection timed out");
440 } else if (errno == EHOSTUNREACH) {
441 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
442 "Host unreachable");
443 } else if (errno == EADDRNOTAVAIL) {
444 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
445 "Address not available");
446 } else if ((errno == EISCONN) || (errno == EBADF)) {
447 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
448 "Socket closed");
449 } else {
450 JNU_ThrowByNameWithMessageAndLastError
451 (env, JNU_JAVANETPKG "SocketException", "connect failed");
452 }
453 return;
454 }
455
456 (*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
457
458 /* set the remote peer address and port */
459 (*env)->SetObjectField(env, this, psi_addressID, iaObj);
460 (*env)->SetIntField(env, this, psi_portID, port);
461
462 /*
463 * we need to initialize the local port field if bind was called
464 * previously to the connect (by the client) then localport field
465 * will already be initialized
466 */
467 if (localport == 0) {
468 /* Now that we're a connected socket, let's extract the port number
469 * that the system chose for us and store it in the Socket object.
470 */
471 socklen_t slen = sizeof(SOCKETADDRESS);
472 if (getsockname(fd, &sa.sa, &slen) == -1) {
473 JNU_ThrowByNameWithMessageAndLastError
474 (env, JNU_JAVANETPKG "SocketException", "Error getting socket name");
475 } else {
476 localport = NET_GetPortFromSockaddr(&sa);
477 (*env)->SetIntField(env, this, psi_localportID, localport);
478 }
479 }
480 }
481
482 /*
483 * Class: java_net_PlainSocketImpl
484 * Method: socketBind
485 * Signature: (Ljava/net/InetAddress;I)V
486 */
487 JNIEXPORT void JNICALL
488 Java_java_net_PlainSocketImpl_socketBind(JNIEnv *env, jobject this,
489 jobject iaObj, jint localport) {
490
491 /* fdObj is the FileDescriptor field on this */
492 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
493 /* fd is an int field on fdObj */
494 int fd;
495 int len = 0;
496 SOCKETADDRESS sa;
497
498 if (IS_NULL(fdObj)) {
499 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
500 "Socket closed");
501 return;
502 } else {
503 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
504 }
505 if (IS_NULL(iaObj)) {
506 JNU_ThrowNullPointerException(env, "iaObj is null.");
507 return;
508 }
509
510 /* bind */
511 if (NET_InetAddressToSockaddr(env, iaObj, localport, &sa,
512 &len, JNI_TRUE) != 0) {
513 return;
514 }
515 setDefaultScopeID(env, &sa.sa);
516
517 if (NET_Bind(fd, &sa, len) < 0) {
518 if (errno == EADDRINUSE || errno == EADDRNOTAVAIL ||
519 errno == EPERM || errno == EACCES) {
520 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "BindException",
521 "Bind failed");
522 } else {
523 JNU_ThrowByNameWithMessageAndLastError
524 (env, JNU_JAVANETPKG "SocketException", "Bind failed");
525 }
526 return;
527 }
528
529 /* set the address */
530 (*env)->SetObjectField(env, this, psi_addressID, iaObj);
531
532 /* initialize the local port */
533 if (localport == 0) {
534 socklen_t slen = sizeof(SOCKETADDRESS);
535 /* Now that we're a connected socket, let's extract the port number
536 * that the system chose for us and store it in the Socket object.
537 */
538 if (getsockname(fd, &sa.sa, &slen) == -1) {
539 JNU_ThrowByNameWithMessageAndLastError
540 (env, JNU_JAVANETPKG "SocketException", "Error getting socket name");
541 return;
542 }
543 localport = NET_GetPortFromSockaddr(&sa);
544 (*env)->SetIntField(env, this, psi_localportID, localport);
545 } else {
546 (*env)->SetIntField(env, this, psi_localportID, localport);
547 }
548 }
549
550 /*
551 * Class: java_net_PlainSocketImpl
552 * Method: socketListen
553 * Signature: (I)V
554 */
555 JNIEXPORT void JNICALL
556 Java_java_net_PlainSocketImpl_socketListen(JNIEnv *env, jobject this,
557 jint count)
558 {
559 /* this FileDescriptor fd field */
560 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
561 /* fdObj's int fd field */
562 int fd;
563
564 if (IS_NULL(fdObj)) {
565 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
566 "Socket closed");
567 return;
568 } else {
569 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
570 }
571
572 /*
573 * Workaround for bugid 4101691 in Solaris 2.6. See 4106600.
574 * If listen backlog is Integer.MAX_VALUE then subtract 1.
575 */
576 if (count == 0x7fffffff)
577 count -= 1;
578
579 if (listen(fd, count) == -1) {
580 JNU_ThrowByNameWithMessageAndLastError
581 (env, JNU_JAVANETPKG "SocketException", "Listen failed");
582 }
583 }
584
585 /*
586 * Class: java_net_PlainSocketImpl
587 * Method: socketAccept
588 * Signature: (Ljava/net/SocketImpl;)V
589 */
590 JNIEXPORT void JNICALL
591 Java_java_net_PlainSocketImpl_socketAccept(JNIEnv *env, jobject this,
592 jobject socket)
593 {
594 /* fields on this */
595 int port;
596 jint timeout = (*env)->GetIntField(env, this, psi_timeoutID);
597 jlong prevNanoTime = 0;
598 jlong nanoTimeout = (jlong) timeout * NET_NSEC_PER_MSEC;
599 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
600
601 /* the FileDescriptor field on socket */
602 jobject socketFdObj;
603 /* the InetAddress field on socket */
604 jobject socketAddressObj;
605
606 /* the ServerSocket fd int field on fdObj */
607 jint fd;
608
609 /* accepted fd */
610 jint newfd;
611
612 SOCKETADDRESS sa;
613 socklen_t slen = sizeof(SOCKETADDRESS);
614
615 if (IS_NULL(fdObj)) {
616 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
617 "Socket closed");
618 return;
619 } else {
620 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
621 }
622 if (IS_NULL(socket)) {
623 JNU_ThrowNullPointerException(env, "socket is null");
624 return;
625 }
626
627 /*
628 * accept connection but ignore ECONNABORTED indicating that
629 * connection was eagerly accepted by the OS but was reset
630 * before accept() was called.
631 *
632 * If accept timeout in place and timeout is adjusted with
633 * each ECONNABORTED or EWOULDBLOCK or EAGAIN to ensure that
634 * semantics of timeout are preserved.
635 */
636 for (;;) {
637 int ret;
638 jlong currNanoTime;
639
640 /* first usage pick up current time */
641 if (prevNanoTime == 0 && nanoTimeout > 0) {
642 prevNanoTime = JVM_NanoTime(env, 0);
643 }
644
645 /* passing a timeout of 0 to poll will return immediately,
646 but in the case of ServerSocket 0 means infinite. */
647 if (timeout <= 0) {
648 ret = NET_Timeout(env, fd, -1, 0);
649 } else {
650 ret = NET_Timeout(env, fd, nanoTimeout / NET_NSEC_PER_MSEC, prevNanoTime);
651 }
652 if (ret == 0) {
653 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
654 "Accept timed out");
655 return;
656 } else if (ret == -1) {
657 if (errno == EBADF) {
658 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
659 } else if (errno == ENOMEM) {
660 JNU_ThrowOutOfMemoryError(env, "NET_Timeout native heap allocation failed");
661 } else {
662 JNU_ThrowByNameWithMessageAndLastError
663 (env, JNU_JAVANETPKG "SocketException", "Accept failed");
664 }
665 return;
666 }
667
668 newfd = NET_Accept(fd, &sa.sa, &slen);
669
670 /* connection accepted */
671 if (newfd >= 0) {
672 SET_BLOCKING(newfd);
673 break;
674 }
675
676 /* non (ECONNABORTED or EWOULDBLOCK or EAGAIN) error */
677 if (!(errno == ECONNABORTED || errno == EWOULDBLOCK || errno == EAGAIN)) {
678 break;
679 }
680
681 /* ECONNABORTED or EWOULDBLOCK or EAGAIN error so adjust timeout if there is one. */
682 if (nanoTimeout >= NET_NSEC_PER_MSEC) {
683 currNanoTime = JVM_NanoTime(env, 0);
684 nanoTimeout -= (currNanoTime - prevNanoTime);
685 if (nanoTimeout < NET_NSEC_PER_MSEC) {
686 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
687 "Accept timed out");
688 return;
689 }
690 prevNanoTime = currNanoTime;
691 }
692 }
693
694 if (newfd < 0) {
695 if (newfd == -2) {
696 JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException",
697 "operation interrupted");
698 } else {
699 if (errno == EINVAL) {
700 errno = EBADF;
701 }
702 if (errno == EBADF) {
703 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
704 } else {
705 JNU_ThrowByNameWithMessageAndLastError
706 (env, JNU_JAVANETPKG "SocketException", "Accept failed");
707 }
708 }
709 return;
710 }
711
712 /*
713 * fill up the remote peer port and address in the new socket structure.
714 */
715 socketAddressObj = NET_SockaddrToInetAddress(env, &sa, &port);
716 if (socketAddressObj == NULL) {
717 /* should be pending exception */
718 close(newfd);
719 return;
720 }
721
722 /*
723 * Populate SocketImpl.fd.fd
724 */
725 socketFdObj = (*env)->GetObjectField(env, socket, psi_fdID);
726 (*env)->SetIntField(env, socketFdObj, IO_fd_fdID, newfd);
727
728 (*env)->SetObjectField(env, socket, psi_addressID, socketAddressObj);
729 (*env)->SetIntField(env, socket, psi_portID, port);
730 /* also fill up the local port information */
731 port = (*env)->GetIntField(env, this, psi_localportID);
732 (*env)->SetIntField(env, socket, psi_localportID, port);
733 }
734
735
736 /*
737 * Class: java_net_PlainSocketImpl
738 * Method: socketAvailable
739 * Signature: ()I
740 */
741 JNIEXPORT jint JNICALL
742 Java_java_net_PlainSocketImpl_socketAvailable(JNIEnv *env, jobject this) {
743
744 jint ret = -1;
745 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
746 jint fd;
747
748 if (IS_NULL(fdObj)) {
749 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
750 "Socket closed");
751 return -1;
752 } else {
753 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
754 }
755 /* NET_SocketAvailable returns 0 for failure, 1 for success */
756 if (NET_SocketAvailable(fd, &ret) == 0){
757 if (errno == ECONNRESET) {
758 JNU_ThrowByName(env, "sun/net/ConnectionResetException", "");
759 } else {
760 JNU_ThrowByNameWithMessageAndLastError
761 (env, JNU_JAVANETPKG "SocketException", "ioctl FIONREAD failed");
762 }
763 }
764 return ret;
765 }
766
767 /*
768 * Class: java_net_PlainSocketImpl
769 * Method: socketClose0
770 * Signature: (Z)V
771 */
772 JNIEXPORT void JNICALL
773 Java_java_net_PlainSocketImpl_socketClose0(JNIEnv *env, jobject this,
774 jboolean useDeferredClose) {
775
776 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
777 jint fd;
778
779 if (IS_NULL(fdObj)) {
780 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
781 "socket already closed");
782 return;
783 } else {
784 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
785 }
786 if (fd != -1) {
787 if (useDeferredClose && marker_fd >= 0) {
788 NET_Dup2(marker_fd, fd);
789 } else {
790 (*env)->SetIntField(env, fdObj, IO_fd_fdID, -1);
791 NET_SocketClose(fd);
792 }
793 }
794 }
795
796 /*
797 * Class: java_net_PlainSocketImpl
798 * Method: socketShutdown
799 * Signature: (I)V
800 */
801 JNIEXPORT void JNICALL
802 Java_java_net_PlainSocketImpl_socketShutdown(JNIEnv *env, jobject this,
803 jint howto)
804 {
805
806 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
807 jint fd;
808
809 /*
810 * WARNING: THIS NEEDS LOCKING. ALSO: SHOULD WE CHECK for fd being
811 * -1 already?
812 */
813 if (IS_NULL(fdObj)) {
814 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
815 "socket already closed");
816 return;
817 } else {
818 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
819 }
820 shutdown(fd, howto);
821 }
822
823
824 /*
825 * Class: java_net_PlainSocketImpl
826 * Method: socketSetOption0
827 * Signature: (IZLjava/lang/Object;)V
828 */
829 JNIEXPORT void JNICALL
830 Java_java_net_PlainSocketImpl_socketSetOption0
831 (JNIEnv *env, jobject this, jint cmd, jboolean on, jobject value)
832 {
833 int fd;
834 int level, optname, optlen;
835 union {
836 int i;
837 struct linger ling;
838 } optval;
839
840 /*
841 * Check that socket hasn't been closed
842 */
843 fd = getFD(env, this);
844 if (fd < 0) {
845 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
846 "Socket closed");
847 return;
848 }
849
850 /*
851 * SO_TIMEOUT is a NOOP on Solaris/Linux
852 */
853 if (cmd == java_net_SocketOptions_SO_TIMEOUT) {
854 return;
855 }
856
857 /*
858 * Map the Java level socket option to the platform specific
859 * level and option name.
860 */
861 if (NET_MapSocketOption(cmd, &level, &optname)) {
862 JNU_ThrowByName(env, "java/net/SocketException", "Invalid option");
863 return;
864 }
865
866 switch (cmd) {
867 case java_net_SocketOptions_SO_SNDBUF :
868 case java_net_SocketOptions_SO_RCVBUF :
869 case java_net_SocketOptions_SO_LINGER :
870 case java_net_SocketOptions_IP_TOS :
871 {
872 jclass cls;
873 jfieldID fid;
874
875 cls = (*env)->FindClass(env, "java/lang/Integer");
876 CHECK_NULL(cls);
877 fid = (*env)->GetFieldID(env, cls, "value", "I");
878 CHECK_NULL(fid);
879
880 if (cmd == java_net_SocketOptions_SO_LINGER) {
881 if (on) {
882 optval.ling.l_onoff = 1;
883 optval.ling.l_linger = (*env)->GetIntField(env, value, fid);
884 } else {
885 optval.ling.l_onoff = 0;
886 optval.ling.l_linger = 0;
887 }
888 optlen = sizeof(optval.ling);
889 } else {
890 optval.i = (*env)->GetIntField(env, value, fid);
891 optlen = sizeof(optval.i);
892 }
893
894 break;
895 }
896
897 /* Boolean -> int */
898 default :
899 optval.i = (on ? 1 : 0);
900 optlen = sizeof(optval.i);
901
902 }
903
904 if (NET_SetSockOpt(fd, level, optname, (const void *)&optval, optlen) < 0) {
905 #if defined(__solaris__) || defined(_AIX)
906 if (errno == EINVAL) {
907 // On Solaris setsockopt will set errno to EINVAL if the socket
908 // is closed. The default error message is then confusing
909 char fullMsg[128];
910 jio_snprintf(fullMsg, sizeof(fullMsg), "Invalid option or socket reset by remote peer");
911 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", fullMsg);
912 return;
913 }
914 #endif /* __solaris__ */
915 JNU_ThrowByNameWithMessageAndLastError
916 (env, JNU_JAVANETPKG "SocketException", "Error setting socket option");
917 }
918 }
919
920 /*
921 * Class: java_net_PlainSocketImpl
922 * Method: socketGetOption
923 * Signature: (ILjava/lang/Object;)I
924 */
925 JNIEXPORT jint JNICALL
926 Java_java_net_PlainSocketImpl_socketGetOption
927 (JNIEnv *env, jobject this, jint cmd, jobject iaContainerObj)
928 {
929 int fd;
930 int level, optname, optlen;
931 union {
932 int i;
933 struct linger ling;
934 } optval;
935
936 /*
937 * Check that socket hasn't been closed
938 */
939 fd = getFD(env, this);
940 if (fd < 0) {
941 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
942 "Socket closed");
943 return -1;
944 }
945
946 /*
947 * SO_BINDADDR isn't a socket option
948 */
949 if (cmd == java_net_SocketOptions_SO_BINDADDR) {
950 SOCKETADDRESS sa;
951 socklen_t len = sizeof(SOCKETADDRESS);
952 int port;
953 jobject iaObj;
954 jclass iaCntrClass;
955 jfieldID iaFieldID;
956
957 if (getsockname(fd, &sa.sa, &len) < 0) {
958 JNU_ThrowByNameWithMessageAndLastError
959 (env, JNU_JAVANETPKG "SocketException", "Error getting socket name");
960 return -1;
961 }
962 iaObj = NET_SockaddrToInetAddress(env, &sa, &port);
963 CHECK_NULL_RETURN(iaObj, -1);
964
965 iaCntrClass = (*env)->GetObjectClass(env, iaContainerObj);
966 iaFieldID = (*env)->GetFieldID(env, iaCntrClass, "addr", "Ljava/net/InetAddress;");
967 CHECK_NULL_RETURN(iaFieldID, -1);
968 (*env)->SetObjectField(env, iaContainerObj, iaFieldID, iaObj);
969 return 0; /* notice change from before */
970 }
971
972 /*
973 * Map the Java level socket option to the platform specific
974 * level and option name.
975 */
976 if (NET_MapSocketOption(cmd, &level, &optname)) {
977 JNU_ThrowByName(env, "java/net/SocketException", "Invalid option");
978 return -1;
979 }
980
981 /*
982 * Args are int except for SO_LINGER
983 */
984 if (cmd == java_net_SocketOptions_SO_LINGER) {
985 optlen = sizeof(optval.ling);
986 } else {
987 optlen = sizeof(optval.i);
988 }
989
990 if (NET_GetSockOpt(fd, level, optname, (void *)&optval, &optlen) < 0) {
991 JNU_ThrowByNameWithMessageAndLastError
992 (env, JNU_JAVANETPKG "SocketException", "Error getting socket option");
993 return -1;
994 }
995
996 switch (cmd) {
997 case java_net_SocketOptions_SO_LINGER:
998 return (optval.ling.l_onoff ? optval.ling.l_linger: -1);
999
1000 case java_net_SocketOptions_SO_SNDBUF:
1001 case java_net_SocketOptions_SO_RCVBUF:
1002 case java_net_SocketOptions_IP_TOS:
1003 return optval.i;
1004
1005 default :
1006 return (optval.i == 0) ? -1 : 1;
1007 }
1008 }
1009
1010
1011 /*
1012 * Class: java_net_PlainSocketImpl
1013 * Method: socketSendUrgentData
1014 * Signature: (B)V
1015 */
1016 JNIEXPORT void JNICALL
1017 Java_java_net_PlainSocketImpl_socketSendUrgentData(JNIEnv *env, jobject this,
1018 jint data) {
1019 /* The fd field */
1020 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
1021 int n, fd;
1022 unsigned char d = data & 0xFF;
1023
1024 if (IS_NULL(fdObj)) {
1025 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
1026 return;
1027 } else {
1028 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
1029 /* Bug 4086704 - If the Socket associated with this file descriptor
1030 * was closed (sysCloseFD), the file descriptor is set to -1.
1031 */
1032 if (fd == -1) {
1033 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
1034 return;
1035 }
1036
1037 }
1038 n = NET_Send(fd, (char *)&d, 1, MSG_OOB);
1039 if (n == -1) {
1040 JNU_ThrowIOExceptionWithLastError(env, "Write failed");
1041 }
1042 }