1 /*
2 * Copyright (c) 1997, 2012, 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 <errno.h>
27 #include <string.h>
28 #include <sys/types.h>
29 #include <sys/socket.h>
30 #if defined(__linux__)
31 #include <sys/poll.h>
32 #endif
33 #include <netinet/tcp.h> /* Defines TCP_NODELAY, needed for 2.6 */
34 #include <netinet/in.h>
35 #ifdef __linux__
36 #include <netinet/ip.h>
37 #endif
38 #include <netdb.h>
39 #include <stdlib.h>
40
41 #ifdef __solaris__
42 #include <fcntl.h>
43 #endif
44 #ifdef __linux__
45 #include <unistd.h>
46 #include <sys/sysctl.h>
47 #endif
48
49 #include "jvm.h"
50 #include "jni_util.h"
51 #include "net_util.h"
52
53 #include "java_net_SocketOptions.h"
54 #include "java_net_PlainSocketImpl.h"
55
56 /************************************************************************
57 * PlainSocketImpl
58 */
59
60 static jfieldID IO_fd_fdID;
61
62 jfieldID psi_fdID;
63 jfieldID psi_addressID;
64 jfieldID psi_ipaddressID;
65 jfieldID psi_portID;
66 jfieldID psi_localportID;
67 jfieldID psi_timeoutID;
68 jfieldID psi_trafficClassID;
69 jfieldID psi_serverSocketID;
70 jfieldID psi_fdLockID;
71 jfieldID psi_closePendingID;
72
73 extern void setDefaultScopeID(JNIEnv *env, struct sockaddr *him);
74
75 /*
76 * file descriptor used for dup2
77 */
78 static int marker_fd = -1;
79
80
81 #define SET_NONBLOCKING(fd) { \
82 int flags = fcntl(fd, F_GETFL); \
83 flags |= O_NONBLOCK; \
84 fcntl(fd, F_SETFL, flags); \
85 }
86
87 #define SET_BLOCKING(fd) { \
88 int flags = fcntl(fd, F_GETFL); \
89 flags &= ~O_NONBLOCK; \
90 fcntl(fd, F_SETFL, flags); \
91 }
92
93 /*
94 * Create the marker file descriptor by establishing a loopback connection
95 * which we shutdown but do not close the fd. The result is an fd that
96 * can be used for read/write.
97 */
98 static int getMarkerFD()
99 {
100 int sv[2];
101
102 #ifdef AF_UNIX
103 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) {
104 return -1;
105 }
106 #else
107 return -1;
108 #endif
109
110 /*
111 * Finally shutdown sv[0] (any reads to this fd will get
112 * EOF; any writes will get an error).
113 */
114 shutdown(sv[0], 2);
115 close(sv[1]);
116
117 return sv[0];
118 }
119
120 /*
121 * Return the file descriptor given a PlainSocketImpl
122 */
123 static int getFD(JNIEnv *env, jobject this) {
124 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
125 CHECK_NULL_RETURN(fdObj, -1);
126 return (*env)->GetIntField(env, fdObj, IO_fd_fdID);
127 }
128
129 /*
130 * The initroto function is called whenever PlainSocketImpl is
131 * loaded, to cache field IDs for efficiency. This is called every time
132 * the Java class is loaded.
133 *
134 * Class: java_net_PlainSocketImpl
135 * Method: initProto
136 * Signature: ()V
137 */
138 JNIEXPORT void JNICALL
139 Java_java_net_PlainSocketImpl_initProto(JNIEnv *env, jclass cls) {
140 psi_fdID = (*env)->GetFieldID(env, cls , "fd",
141 "Ljava/io/FileDescriptor;");
142 CHECK_NULL(psi_fdID);
143 psi_addressID = (*env)->GetFieldID(env, cls, "address",
144 "Ljava/net/InetAddress;");
145 CHECK_NULL(psi_addressID);
146 psi_portID = (*env)->GetFieldID(env, cls, "port", "I");
147 CHECK_NULL(psi_portID);
148 psi_localportID = (*env)->GetFieldID(env, cls, "localport", "I");
149 CHECK_NULL(psi_localportID);
150 psi_timeoutID = (*env)->GetFieldID(env, cls, "timeout", "I");
151 CHECK_NULL(psi_timeoutID);
152 psi_trafficClassID = (*env)->GetFieldID(env, cls, "trafficClass", "I");
153 CHECK_NULL(psi_trafficClassID);
154 psi_serverSocketID = (*env)->GetFieldID(env, cls, "serverSocket",
155 "Ljava/net/ServerSocket;");
156 CHECK_NULL(psi_serverSocketID);
157 psi_fdLockID = (*env)->GetFieldID(env, cls, "fdLock",
158 "Ljava/lang/Object;");
159 CHECK_NULL(psi_fdLockID);
160 psi_closePendingID = (*env)->GetFieldID(env, cls, "closePending", "Z");
161 CHECK_NULL(psi_closePendingID);
162 IO_fd_fdID = NET_GetFileDescriptorID(env);
163 CHECK_NULL(IO_fd_fdID);
164
165 initInetAddressIDs(env);
166 JNU_CHECK_EXCEPTION(env);
167
168 /* Create the marker fd used for dup2 */
169 marker_fd = getMarkerFD();
170 }
171
172 /* a global reference to the java.net.SocketException class. In
173 * socketCreate, we ensure that this is initialized. This is to
174 * prevent the problem where socketCreate runs out of file
175 * descriptors, and is then unable to load the exception class.
176 */
177 static jclass socketExceptionCls;
178
179 /*
180 * Class: java_net_PlainSocketImpl
181 * Method: socketCreate
182 * Signature: (Z)V */
183 JNIEXPORT void JNICALL
184 Java_java_net_PlainSocketImpl_socketCreate(JNIEnv *env, jobject this,
185 jboolean stream) {
186 jobject fdObj, ssObj;
187 int fd;
188 int type = (stream ? SOCK_STREAM : SOCK_DGRAM);
189 #ifdef AF_INET6
190 int domain = ipv6_available() ? AF_INET6 : AF_INET;
191 #else
192 int domain = AF_INET;
193 #endif
194
195 if (socketExceptionCls == NULL) {
196 jclass c = (*env)->FindClass(env, "java/net/SocketException");
197 CHECK_NULL(c);
198 socketExceptionCls = (jclass)(*env)->NewGlobalRef(env, c);
199 CHECK_NULL(socketExceptionCls);
200 }
201 fdObj = (*env)->GetObjectField(env, this, psi_fdID);
202
203 if (fdObj == NULL) {
204 (*env)->ThrowNew(env, socketExceptionCls, "null fd object");
205 return;
206 }
207
208 if ((fd = socket(domain, type, 0)) == -1) {
209 /* note: if you run out of fds, you may not be able to load
210 * the exception class, and get a NoClassDefFoundError
211 * instead.
212 */
213 NET_ThrowNew(env, errno, "can't create socket");
214 return;
215 }
216
217 #ifdef AF_INET6
218 /* Disable IPV6_V6ONLY to ensure dual-socket support */
219 if (domain == AF_INET6) {
220 int arg = 0;
221 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&arg,
222 sizeof(int)) < 0) {
223 NET_ThrowNew(env, errno, "cannot set IPPROTO_IPV6");
224 close(fd);
225 return;
226 }
227 }
228 #endif /* AF_INET6 */
229
230 /*
231 * If this is a server socket then enable SO_REUSEADDR
232 * automatically and set to non blocking.
233 */
234 ssObj = (*env)->GetObjectField(env, this, psi_serverSocketID);
235 if (ssObj != NULL) {
236 int arg = 1;
237 SET_NONBLOCKING(fd);
238 if (NET_SetSockOpt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&arg,
239 sizeof(arg)) < 0) {
240 NET_ThrowNew(env, errno, "cannot set SO_REUSEADDR");
241 close(fd);
242 return;
243 }
244 }
245
246 (*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
247 }
248
249 /*
250 * inetAddress is the address object passed to the socket connect
251 * call.
252 *
253 * Class: java_net_PlainSocketImpl
254 * Method: socketConnect
255 * Signature: (Ljava/net/InetAddress;I)V
256 */
257 JNIEXPORT void JNICALL
258 Java_java_net_PlainSocketImpl_socketConnect(JNIEnv *env, jobject this,
259 jobject iaObj, jint port,
260 jint timeout)
261 {
262 jint localport = (*env)->GetIntField(env, this, psi_localportID);
263 int len = 0;
264
265 /* fdObj is the FileDescriptor field on this */
266 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
267
268 jclass clazz = (*env)->GetObjectClass(env, this);
269
270 jobject fdLock;
271
272 jint trafficClass = (*env)->GetIntField(env, this, psi_trafficClassID);
273
274 /* fd is an int field on iaObj */
275 jint fd;
276
277 SOCKADDR him;
278 /* The result of the connection */
279 int connect_rv = -1;
280
281 if (IS_NULL(fdObj)) {
282 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
283 return;
284 } else {
285 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
286 }
287 if (IS_NULL(iaObj)) {
288 JNU_ThrowNullPointerException(env, "inet address argument null.");
289 return;
290 }
291
292 /* connect */
293 if (NET_InetAddressToSockaddr(env, iaObj, port, (struct sockaddr *)&him, &len, JNI_TRUE) != 0) {
294 return;
295 }
296 setDefaultScopeID(env, (struct sockaddr *)&him);
297
298 #ifdef AF_INET6
299 if (trafficClass != 0 && ipv6_available()) {
300 NET_SetTrafficClass((struct sockaddr *)&him, trafficClass);
301 }
302 #endif /* AF_INET6 */
303 if (timeout <= 0) {
304 connect_rv = NET_Connect(fd, (struct sockaddr *)&him, len);
305 #ifdef __solaris__
306 if (connect_rv == -1 && errno == EINPROGRESS ) {
307
308 /* This can happen if a blocking connect is interrupted by a signal.
309 * See 6343810.
310 */
311 while (1) {
312 struct pollfd pfd;
313 pfd.fd = fd;
314 pfd.events = POLLOUT;
315
316 connect_rv = NET_Poll(&pfd, 1, -1);
317
318 if (connect_rv == -1) {
319 if (errno == EINTR) {
320 continue;
321 } else {
322 break;
323 }
324 }
325 if (connect_rv > 0) {
326 socklen_t optlen;
327 /* has connection been established */
328 optlen = sizeof(connect_rv);
329 if (getsockopt(fd, SOL_SOCKET, SO_ERROR,
330 (void*)&connect_rv, &optlen) <0) {
331 connect_rv = errno;
332 }
333
334 if (connect_rv != 0) {
335 /* restore errno */
336 errno = connect_rv;
337 connect_rv = -1;
338 }
339 break;
340 }
341 }
342 }
343 #endif
344 } else {
345 /*
346 * A timeout was specified. We put the socket into non-blocking
347 * mode, connect, and then wait for the connection to be
348 * established, fail, or timeout.
349 */
350 SET_NONBLOCKING(fd);
351
352 /* no need to use NET_Connect as non-blocking */
353 connect_rv = connect(fd, (struct sockaddr *)&him, len);
354
355 /* connection not established immediately */
356 if (connect_rv != 0) {
357 socklen_t optlen;
358 jlong prevTime = JVM_CurrentTimeMillis(env, 0);
359
360 if (errno != EINPROGRESS) {
361 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
362 "connect failed");
363 SET_BLOCKING(fd);
364 return;
365 }
366
367 /*
368 * Wait for the connection to be established or a
369 * timeout occurs. poll needs to handle EINTR in
370 * case lwp sig handler redirects any process signals to
371 * this thread.
372 */
373 while (1) {
374 jlong newTime;
375 struct pollfd pfd;
376 pfd.fd = fd;
377 pfd.events = POLLOUT;
378
379 errno = 0;
380 connect_rv = NET_Poll(&pfd, 1, timeout);
381
382 if (connect_rv >= 0) {
383 break;
384 }
385 if (errno != EINTR) {
386 break;
387 }
388
389 /*
390 * The poll was interrupted so adjust timeout and
391 * restart
392 */
393 newTime = JVM_CurrentTimeMillis(env, 0);
394 timeout -= (newTime - prevTime);
395 if (timeout <= 0) {
396 connect_rv = 0;
397 break;
398 }
399 prevTime = newTime;
400
401 } /* while */
402
403 if (connect_rv == 0) {
404 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
405 "connect timed out");
406
407 /*
408 * Timeout out but connection may still be established.
409 * At the high level it should be closed immediately but
410 * just in case we make the socket blocking again and
411 * shutdown input & output.
412 */
413 SET_BLOCKING(fd);
414 shutdown(fd, 2);
415 return;
416 }
417
418 /* has connection been established */
419 optlen = sizeof(connect_rv);
420 if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&connect_rv,
421 &optlen) <0) {
422 connect_rv = errno;
423 }
424 }
425
426 /* make socket blocking again */
427 SET_BLOCKING(fd);
428
429 /* restore errno */
430 if (connect_rv != 0) {
431 errno = connect_rv;
432 connect_rv = -1;
433 }
434 }
435
436 /* report the appropriate exception */
437 if (connect_rv < 0) {
438
439 #ifdef __linux__
440 /*
441 * Linux/GNU distribution setup /etc/hosts so that
442 * InetAddress.getLocalHost gets back the loopback address
443 * rather than the host address. Thus a socket can be
444 * bound to the loopback address and the connect will
445 * fail with EADDRNOTAVAIL. In addition the Linux kernel
446 * returns the wrong error in this case - it returns EINVAL
447 * instead of EADDRNOTAVAIL. We handle this here so that
448 * a more descriptive exception text is used.
449 */
450 if (connect_rv == -1 && errno == EINVAL) {
451 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
452 "Invalid argument or cannot assign requested address");
453 return;
454 }
455 #endif
456 #if defined(EPROTO)
457 if (errno == EPROTO) {
458 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ProtocolException",
459 "Protocol error");
460 return;
461 }
462 #endif
463 if (errno == ECONNREFUSED) {
464 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
465 "Connection refused");
466 } else if (errno == ETIMEDOUT) {
467 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
468 "Connection timed out");
469 } else if (errno == EHOSTUNREACH) {
470 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
471 "Host unreachable");
472 } else if (errno == EADDRNOTAVAIL) {
473 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
474 "Address not available");
475 } else if ((errno == EISCONN) || (errno == EBADF)) {
476 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
477 "Socket closed");
478 } else {
479 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "connect failed");
480 }
481 return;
482 }
483
484 (*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
485
486 /* set the remote peer address and port */
487 (*env)->SetObjectField(env, this, psi_addressID, iaObj);
488 (*env)->SetIntField(env, this, psi_portID, port);
489
490 /*
491 * we need to initialize the local port field if bind was called
492 * previously to the connect (by the client) then localport field
493 * will already be initialized
494 */
495 if (localport == 0) {
496 /* Now that we're a connected socket, let's extract the port number
497 * that the system chose for us and store it in the Socket object.
498 */
499 socklen_t slen = SOCKADDR_LEN;
500 if (getsockname(fd, (struct sockaddr *)&him, &slen) == -1) {
501 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
502 "Error getting socket name");
503 } else {
504 localport = NET_GetPortFromSockaddr((struct sockaddr *)&him);
505 (*env)->SetIntField(env, this, psi_localportID, localport);
506 }
507 }
508 }
509
510 /*
511 * Class: java_net_PlainSocketImpl
512 * Method: socketBind
513 * Signature: (Ljava/net/InetAddress;I)V
514 */
515 JNIEXPORT void JNICALL
516 Java_java_net_PlainSocketImpl_socketBind(JNIEnv *env, jobject this,
517 jobject iaObj, jint localport) {
518
519 /* fdObj is the FileDescriptor field on this */
520 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
521 /* fd is an int field on fdObj */
522 int fd;
523 int len;
524 SOCKADDR him;
525
526 if (IS_NULL(fdObj)) {
527 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
528 "Socket closed");
529 return;
530 } else {
531 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
532 }
533 if (IS_NULL(iaObj)) {
534 JNU_ThrowNullPointerException(env, "iaObj is null.");
535 return;
536 }
537
538 /* bind */
539 if (NET_InetAddressToSockaddr(env, iaObj, localport, (struct sockaddr *)&him, &len, JNI_TRUE) != 0) {
540 return;
541 }
542 setDefaultScopeID(env, (struct sockaddr *)&him);
543
544 if (NET_Bind(fd, (struct sockaddr *)&him, len) < 0) {
545 if (errno == EADDRINUSE || errno == EADDRNOTAVAIL ||
546 errno == EPERM || errno == EACCES) {
547 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "BindException",
548 "Bind failed");
549 } else {
550 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
551 "Bind failed");
552 }
553 return;
554 }
555
556 /* set the address */
557 (*env)->SetObjectField(env, this, psi_addressID, iaObj);
558
559 /* initialize the local port */
560 if (localport == 0) {
561 socklen_t slen = sizeof(him);
562 /* Now that we're a connected socket, let's extract the port number
563 * that the system chose for us and store it in the Socket object.
564 */
565 if (getsockname(fd, (struct sockaddr *)&him, &slen) == -1) {
566 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
567 "Error getting socket name");
568 return;
569 }
570 localport = NET_GetPortFromSockaddr((struct sockaddr *)&him);
571 (*env)->SetIntField(env, this, psi_localportID, localport);
572 } else {
573 (*env)->SetIntField(env, this, psi_localportID, localport);
574 }
575 }
576
577 /*
578 * Class: java_net_PlainSocketImpl
579 * Method: socketListen
580 * Signature: (I)V
581 */
582 JNIEXPORT void JNICALL
583 Java_java_net_PlainSocketImpl_socketListen (JNIEnv *env, jobject this,
584 jint count)
585 {
586 /* this FileDescriptor fd field */
587 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
588 /* fdObj's int fd field */
589 int fd;
590
591 if (IS_NULL(fdObj)) {
592 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
593 "Socket closed");
594 return;
595 } else {
596 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
597 }
598
599 /*
600 * Workaround for bugid 4101691 in Solaris 2.6. See 4106600.
601 * If listen backlog is Integer.MAX_VALUE then subtract 1.
602 */
603 if (count == 0x7fffffff)
604 count -= 1;
605
606 if (listen(fd, count) == -1) {
607 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
608 "Listen failed");
609 }
610 }
611
612 /*
613 * Class: java_net_PlainSocketImpl
614 * Method: socketAccept
615 * Signature: (Ljava/net/SocketImpl;)V
616 */
617 JNIEXPORT void JNICALL
618 Java_java_net_PlainSocketImpl_socketAccept(JNIEnv *env, jobject this,
619 jobject socket)
620 {
621 /* fields on this */
622 int port;
623 jint timeout = (*env)->GetIntField(env, this, psi_timeoutID);
624 jlong prevTime = 0;
625 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
626
627 /* the FileDescriptor field on socket */
628 jobject socketFdObj;
629 /* the InetAddress field on socket */
630 jobject socketAddressObj;
631
632 /* the ServerSocket fd int field on fdObj */
633 jint fd;
634
635 /* accepted fd */
636 jint newfd;
637
638 SOCKADDR him;
639 socklen_t slen = SOCKADDR_LEN;
640
641 if (IS_NULL(fdObj)) {
642 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
643 "Socket closed");
644 return;
645 } else {
646 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
647 }
648 if (IS_NULL(socket)) {
649 JNU_ThrowNullPointerException(env, "socket is null");
650 return;
651 }
652
653 /*
654 * accept connection but ignore ECONNABORTED indicating that
655 * connection was eagerly accepted by the OS but was reset
656 * before accept() was called.
657 *
658 * If accept timeout in place and timeout is adjusted with
659 * each ECONNABORTED or EWOULDBLOCK to ensure that semantics
660 * of timeout are preserved.
661 */
662 for (;;) {
663 int ret;
664
665 /* first usage pick up current time */
666 if (prevTime == 0 && timeout > 0) {
667 prevTime = JVM_CurrentTimeMillis(env, 0);
668 }
669
670 /* passing a timeout of 0 to poll will return immediately,
671 but in the case of ServerSocket 0 means infinite. */
672 if (timeout <= 0) {
673 ret = NET_Timeout(fd, -1);
674 } else {
675 ret = NET_Timeout(fd, timeout);
676 }
677 if (ret == 0) {
678 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
679 "Accept timed out");
680 return;
681 } else if (ret == -1) {
682 if (errno == EBADF) {
683 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
684 } else if (errno == ENOMEM) {
685 JNU_ThrowOutOfMemoryError(env, "NET_Timeout native heap allocation failed");
686 } else {
687 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "Accept failed");
688 }
689 return;
690 }
691
692 newfd = NET_Accept(fd, (struct sockaddr *)&him, &slen);
693
694 /* connection accepted */
695 if (newfd >= 0) {
696 SET_BLOCKING(newfd);
697 break;
698 }
699
700 /* non (ECONNABORTED or EWOULDBLOCK) error */
701 if (!(errno == ECONNABORTED || errno == EWOULDBLOCK)) {
702 break;
703 }
704
705 /* ECONNABORTED or EWOULDBLOCK error so adjust timeout if there is one. */
706 if (timeout) {
707 jlong currTime = JVM_CurrentTimeMillis(env, 0);
708 timeout -= (currTime - prevTime);
709
710 if (timeout <= 0) {
711 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
712 "Accept timed out");
713 return;
714 }
715 prevTime = currTime;
716 }
717 }
718
719 if (newfd < 0) {
720 if (newfd == -2) {
721 JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException",
722 "operation interrupted");
723 } else {
724 if (errno == EINVAL) {
725 errno = EBADF;
726 }
727 if (errno == EBADF) {
728 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
729 } else {
730 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "Accept failed");
731 }
732 }
733 return;
734 }
735
736 /*
737 * fill up the remote peer port and address in the new socket structure.
738 */
739 socketAddressObj = NET_SockaddrToInetAddress(env, (struct sockaddr *)&him, &port);
740 if (socketAddressObj == NULL) {
741 /* should be pending exception */
742 close(newfd);
743 return;
744 }
745
746 /*
747 * Populate SocketImpl.fd.fd
748 */
749 socketFdObj = (*env)->GetObjectField(env, socket, psi_fdID);
750 (*env)->SetIntField(env, socketFdObj, IO_fd_fdID, newfd);
751
752 (*env)->SetObjectField(env, socket, psi_addressID, socketAddressObj);
753 (*env)->SetIntField(env, socket, psi_portID, port);
754 /* also fill up the local port information */
755 port = (*env)->GetIntField(env, this, psi_localportID);
756 (*env)->SetIntField(env, socket, psi_localportID, port);
757 }
758
759
760 /*
761 * Class: java_net_PlainSocketImpl
762 * Method: socketAvailable
763 * Signature: ()I
764 */
765 JNIEXPORT jint JNICALL
766 Java_java_net_PlainSocketImpl_socketAvailable(JNIEnv *env, jobject this) {
767
768 jint ret = -1;
769 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
770 jint fd;
771
772 if (IS_NULL(fdObj)) {
773 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
774 "Socket closed");
775 return -1;
776 } else {
777 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
778 }
779 /* NET_SocketAvailable returns 0 for failure, 1 for success */
780 if (NET_SocketAvailable(fd, &ret) == 0){
781 if (errno == ECONNRESET) {
782 JNU_ThrowByName(env, "sun/net/ConnectionResetException", "");
783 } else {
784 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
785 "ioctl FIONREAD failed");
786 }
787 }
788 return ret;
789 }
790
791 /*
792 * Class: java_net_PlainSocketImpl
793 * Method: socketClose0
794 * Signature: (Z)V
795 */
796 JNIEXPORT void JNICALL
797 Java_java_net_PlainSocketImpl_socketClose0(JNIEnv *env, jobject this,
798 jboolean useDeferredClose) {
799
800 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
801 jint fd;
802
803 if (IS_NULL(fdObj)) {
804 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
805 "socket already closed");
806 return;
807 } else {
808 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
809 }
810 if (fd != -1) {
811 if (useDeferredClose && marker_fd >= 0) {
812 NET_Dup2(marker_fd, fd);
813 } else {
814 (*env)->SetIntField(env, fdObj, IO_fd_fdID, -1);
815 NET_SocketClose(fd);
816 }
817 }
818 }
819
820 /*
821 * Class: java_net_PlainSocketImpl
822 * Method: socketShutdown
823 * Signature: (I)V
824 */
825 JNIEXPORT void JNICALL
826 Java_java_net_PlainSocketImpl_socketShutdown(JNIEnv *env, jobject this,
827 jint howto)
828 {
829
830 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
831 jint fd;
832
833 /*
834 * WARNING: THIS NEEDS LOCKING. ALSO: SHOULD WE CHECK for fd being
835 * -1 already?
836 */
837 if (IS_NULL(fdObj)) {
838 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
839 "socket already closed");
840 return;
841 } else {
842 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
843 }
844 shutdown(fd, howto);
845 }
846
847
848 /*
849 * Class: java_net_PlainSocketImpl
850 * Method: socketSetOption
851 * Signature: (IZLjava/lang/Object;)V
852 */
853 JNIEXPORT void JNICALL
854 Java_java_net_PlainSocketImpl_socketSetOption(JNIEnv *env, jobject this,
855 jint cmd, jboolean on,
856 jobject value) {
857 int fd;
858 int level, optname, optlen;
859 union {
860 int i;
861 struct linger ling;
862 } optval;
863
864 /*
865 * Check that socket hasn't been closed
866 */
867 fd = getFD(env, this);
868 if (fd < 0) {
869 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
870 "Socket closed");
871 return;
872 }
873
874 /*
875 * SO_TIMEOUT is a NOOP on Solaris/Linux
876 */
877 if (cmd == java_net_SocketOptions_SO_TIMEOUT) {
878 return;
879 }
880
881 /*
882 * Map the Java level socket option to the platform specific
883 * level and option name.
884 */
885 if (NET_MapSocketOption(cmd, &level, &optname)) {
886 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Invalid option");
887 return;
888 }
889
890 switch (cmd) {
891 case java_net_SocketOptions_SO_SNDBUF :
892 case java_net_SocketOptions_SO_RCVBUF :
893 case java_net_SocketOptions_SO_LINGER :
894 case java_net_SocketOptions_IP_TOS :
895 {
896 jclass cls;
897 jfieldID fid;
898
899 cls = (*env)->FindClass(env, "java/lang/Integer");
900 CHECK_NULL(cls);
901 fid = (*env)->GetFieldID(env, cls, "value", "I");
902 CHECK_NULL(fid);
903
904 if (cmd == java_net_SocketOptions_SO_LINGER) {
905 if (on) {
906 optval.ling.l_onoff = 1;
907 optval.ling.l_linger = (*env)->GetIntField(env, value, fid);
908 } else {
909 optval.ling.l_onoff = 0;
910 optval.ling.l_linger = 0;
911 }
912 optlen = sizeof(optval.ling);
913 } else {
914 optval.i = (*env)->GetIntField(env, value, fid);
915 optlen = sizeof(optval.i);
916 }
917
918 break;
919 }
920
921 /* Boolean -> int */
922 default :
923 optval.i = (on ? 1 : 0);
924 optlen = sizeof(optval.i);
925
926 }
927
928 if (NET_SetSockOpt(fd, level, optname, (const void *)&optval, optlen) < 0) {
929 #if defined(__solaris__) || defined(_AIX)
930 if (errno == EINVAL) {
931 // On Solaris setsockopt will set errno to EINVAL if the socket
932 // is closed. The default error message is then confusing
933 char fullMsg[128];
934 jio_snprintf(fullMsg, sizeof(fullMsg), "Invalid option or socket reset by remote peer");
935 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", fullMsg);
936 return;
937 }
938 #endif /* __solaris__ */
939 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
940 "Error setting socket option");
941 }
942 }
943
944 /*
945 * Class: java_net_PlainSocketImpl
946 * Method: socketGetOption
947 * Signature: (I)I
948 */
949 JNIEXPORT jint JNICALL
950 Java_java_net_PlainSocketImpl_socketGetOption(JNIEnv *env, jobject this,
951 jint cmd, jobject iaContainerObj) {
952
953 int fd;
954 int level, optname, optlen;
955 union {
956 int i;
957 struct linger ling;
958 } optval;
959
960 /*
961 * Check that socket hasn't been closed
962 */
963 fd = getFD(env, this);
964 if (fd < 0) {
965 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
966 "Socket closed");
967 return -1;
968 }
969
970 /*
971 * SO_BINDADDR isn't a socket option
972 */
973 if (cmd == java_net_SocketOptions_SO_BINDADDR) {
974 SOCKADDR him;
975 socklen_t len = 0;
976 int port;
977 jobject iaObj;
978 jclass iaCntrClass;
979 jfieldID iaFieldID;
980
981 len = SOCKADDR_LEN;
982
983 if (getsockname(fd, (struct sockaddr *)&him, &len) < 0) {
984 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
985 "Error getting socket name");
986 return -1;
987 }
988 iaObj = NET_SockaddrToInetAddress(env, (struct sockaddr *)&him, &port);
989 CHECK_NULL_RETURN(iaObj, -1);
990
991 iaCntrClass = (*env)->GetObjectClass(env, iaContainerObj);
992 iaFieldID = (*env)->GetFieldID(env, iaCntrClass, "addr", "Ljava/net/InetAddress;");
993 CHECK_NULL_RETURN(iaFieldID, -1);
994 (*env)->SetObjectField(env, iaContainerObj, iaFieldID, iaObj);
995 return 0; /* notice change from before */
996 }
997
998 /*
999 * Map the Java level socket option to the platform specific
1000 * level and option name.
1001 */
1002 if (NET_MapSocketOption(cmd, &level, &optname)) {
1003 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Invalid option");
1004 return -1;
1005 }
1006
1007 /*
1008 * Args are int except for SO_LINGER
1009 */
1010 if (cmd == java_net_SocketOptions_SO_LINGER) {
1011 optlen = sizeof(optval.ling);
1012 } else {
1013 optlen = sizeof(optval.i);
1014 }
1015
1016 if (NET_GetSockOpt(fd, level, optname, (void *)&optval, &optlen) < 0) {
1017 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1018 "Error getting socket option");
1019 return -1;
1020 }
1021
1022 switch (cmd) {
1023 case java_net_SocketOptions_SO_LINGER:
1024 return (optval.ling.l_onoff ? optval.ling.l_linger: -1);
1025
1026 case java_net_SocketOptions_SO_SNDBUF:
1027 case java_net_SocketOptions_SO_RCVBUF:
1028 case java_net_SocketOptions_IP_TOS:
1029 return optval.i;
1030
1031 default :
1032 return (optval.i == 0) ? -1 : 1;
1033 }
1034 }
1035
1036
1037 /*
1038 * Class: java_net_PlainSocketImpl
1039 * Method: socketSendUrgentData
1040 * Signature: (B)V
1041 */
1042 JNIEXPORT void JNICALL
1043 Java_java_net_PlainSocketImpl_socketSendUrgentData(JNIEnv *env, jobject this,
1044 jint data) {
1045 /* The fd field */
1046 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
1047 int n, fd;
1048 unsigned char d = data & 0xFF;
1049
1050 if (IS_NULL(fdObj)) {
1051 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
1052 return;
1053 } else {
1054 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
1055 /* Bug 4086704 - If the Socket associated with this file descriptor
1056 * was closed (sysCloseFD), the file descriptor is set to -1.
1057 */
1058 if (fd == -1) {
1059 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
1060 return;
1061 }
1062
1063 }
1064 n = NET_Send(fd, (char *)&d, 1, MSG_OOB);
1065 if (n == -1) {
1066 NET_ThrowByNameWithLastError(env, "java/io/IOException", "Write failed");
1067 }
1068 }