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 /* Set IPV6_V6ONLY=0, to request a dual-stack socket, if supported */
219 if (domain == AF_INET6) {
220 int arg = 0;
221 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&arg, sizeof(int));
222 }
223 #endif /* AF_INET6 */
224
225 /*
226 * If this is a server socket then enable SO_REUSEADDR
227 * automatically and set to non blocking.
228 */
229 ssObj = (*env)->GetObjectField(env, this, psi_serverSocketID);
230 if (ssObj != NULL) {
231 int arg = 1;
232 SET_NONBLOCKING(fd);
233 if (NET_SetSockOpt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&arg,
234 sizeof(arg)) < 0) {
235 NET_ThrowNew(env, errno, "cannot set SO_REUSEADDR");
236 close(fd);
237 return;
238 }
239 }
240
241 (*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
242 }
243
244 /*
245 * inetAddress is the address object passed to the socket connect
246 * call.
247 *
248 * Class: java_net_PlainSocketImpl
249 * Method: socketConnect
250 * Signature: (Ljava/net/InetAddress;I)V
251 */
252 JNIEXPORT void JNICALL
253 Java_java_net_PlainSocketImpl_socketConnect(JNIEnv *env, jobject this,
254 jobject iaObj, jint port,
255 jint timeout)
256 {
257 jint localport = (*env)->GetIntField(env, this, psi_localportID);
258 int len = 0;
259
260 /* fdObj is the FileDescriptor field on this */
261 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
262
263 jclass clazz = (*env)->GetObjectClass(env, this);
264
265 jobject fdLock;
266
267 jint trafficClass = (*env)->GetIntField(env, this, psi_trafficClassID);
268
269 /* fd is an int field on iaObj */
270 jint fd;
271
272 SOCKADDR him;
273 /* The result of the connection */
274 int connect_rv = -1;
275
276 if (IS_NULL(fdObj)) {
277 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
278 return;
279 } else {
280 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
281 }
282 if (IS_NULL(iaObj)) {
283 JNU_ThrowNullPointerException(env, "inet address argument null.");
284 return;
285 }
286
287 /* connect */
288 if (NET_InetAddressToSockaddr(env, iaObj, port, (struct sockaddr *)&him, &len, JNI_TRUE) != 0) {
289 return;
290 }
291 setDefaultScopeID(env, (struct sockaddr *)&him);
292
293 #ifdef AF_INET6
294 if (trafficClass != 0 && ipv6_available()) {
295 NET_SetTrafficClass((struct sockaddr *)&him, trafficClass);
296 }
297 #endif /* AF_INET6 */
298 if (timeout <= 0) {
299 connect_rv = NET_Connect(fd, (struct sockaddr *)&him, len);
300 #ifdef __solaris__
301 if (connect_rv == -1 && errno == EINPROGRESS ) {
302
303 /* This can happen if a blocking connect is interrupted by a signal.
304 * See 6343810.
305 */
306 while (1) {
307 struct pollfd pfd;
308 pfd.fd = fd;
309 pfd.events = POLLOUT;
310
311 connect_rv = NET_Poll(&pfd, 1, -1);
312
313 if (connect_rv == -1) {
314 if (errno == EINTR) {
315 continue;
316 } else {
317 break;
318 }
319 }
320 if (connect_rv > 0) {
321 socklen_t optlen;
322 /* has connection been established */
323 optlen = sizeof(connect_rv);
324 if (getsockopt(fd, SOL_SOCKET, SO_ERROR,
325 (void*)&connect_rv, &optlen) <0) {
326 connect_rv = errno;
327 }
328
329 if (connect_rv != 0) {
330 /* restore errno */
331 errno = connect_rv;
332 connect_rv = -1;
333 }
334 break;
335 }
336 }
337 }
338 #endif
339 } else {
340 /*
341 * A timeout was specified. We put the socket into non-blocking
342 * mode, connect, and then wait for the connection to be
343 * established, fail, or timeout.
344 */
345 SET_NONBLOCKING(fd);
346
347 /* no need to use NET_Connect as non-blocking */
348 connect_rv = connect(fd, (struct sockaddr *)&him, len);
349
350 /* connection not established immediately */
351 if (connect_rv != 0) {
352 socklen_t optlen;
353 jlong prevTime = JVM_CurrentTimeMillis(env, 0);
354
355 if (errno != EINPROGRESS) {
356 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
357 "connect failed");
358 SET_BLOCKING(fd);
359 return;
360 }
361
362 /*
363 * Wait for the connection to be established or a
364 * timeout occurs. poll needs to handle EINTR in
365 * case lwp sig handler redirects any process signals to
366 * this thread.
367 */
368 while (1) {
369 jlong newTime;
370 struct pollfd pfd;
371 pfd.fd = fd;
372 pfd.events = POLLOUT;
373
374 errno = 0;
375 connect_rv = NET_Poll(&pfd, 1, timeout);
376
377 if (connect_rv >= 0) {
378 break;
379 }
380 if (errno != EINTR) {
381 break;
382 }
383
384 /*
385 * The poll was interrupted so adjust timeout and
386 * restart
387 */
388 newTime = JVM_CurrentTimeMillis(env, 0);
389 timeout -= (newTime - prevTime);
390 if (timeout <= 0) {
391 connect_rv = 0;
392 break;
393 }
394 prevTime = newTime;
395
396 } /* while */
397
398 if (connect_rv == 0) {
399 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
400 "connect timed out");
401
402 /*
403 * Timeout out but connection may still be established.
404 * At the high level it should be closed immediately but
405 * just in case we make the socket blocking again and
406 * shutdown input & output.
407 */
408 SET_BLOCKING(fd);
409 shutdown(fd, 2);
410 return;
411 }
412
413 /* has connection been established */
414 optlen = sizeof(connect_rv);
415 if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&connect_rv,
416 &optlen) <0) {
417 connect_rv = errno;
418 }
419 }
420
421 /* make socket blocking again */
422 SET_BLOCKING(fd);
423
424 /* restore errno */
425 if (connect_rv != 0) {
426 errno = connect_rv;
427 connect_rv = -1;
428 }
429 }
430
431 /* report the appropriate exception */
432 if (connect_rv < 0) {
433
434 #ifdef __linux__
435 /*
436 * Linux/GNU distribution setup /etc/hosts so that
437 * InetAddress.getLocalHost gets back the loopback address
438 * rather than the host address. Thus a socket can be
439 * bound to the loopback address and the connect will
440 * fail with EADDRNOTAVAIL. In addition the Linux kernel
441 * returns the wrong error in this case - it returns EINVAL
442 * instead of EADDRNOTAVAIL. We handle this here so that
443 * a more descriptive exception text is used.
444 */
445 if (connect_rv == -1 && errno == EINVAL) {
446 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
447 "Invalid argument or cannot assign requested address");
448 return;
449 }
450 #endif
451 #if defined(EPROTO)
452 if (errno == EPROTO) {
453 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ProtocolException",
454 "Protocol error");
455 return;
456 }
457 #endif
458 if (errno == ECONNREFUSED) {
459 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
460 "Connection refused");
461 } else if (errno == ETIMEDOUT) {
462 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
463 "Connection timed out");
464 } else if (errno == EHOSTUNREACH) {
465 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
466 "Host unreachable");
467 } else if (errno == EADDRNOTAVAIL) {
468 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
469 "Address not available");
470 } else if ((errno == EISCONN) || (errno == EBADF)) {
471 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
472 "Socket closed");
473 } else {
474 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "connect failed");
475 }
476 return;
477 }
478
479 (*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
480
481 /* set the remote peer address and port */
482 (*env)->SetObjectField(env, this, psi_addressID, iaObj);
483 (*env)->SetIntField(env, this, psi_portID, port);
484
485 /*
486 * we need to initialize the local port field if bind was called
487 * previously to the connect (by the client) then localport field
488 * will already be initialized
489 */
490 if (localport == 0) {
491 /* Now that we're a connected socket, let's extract the port number
492 * that the system chose for us and store it in the Socket object.
493 */
494 socklen_t slen = SOCKADDR_LEN;
495 if (getsockname(fd, (struct sockaddr *)&him, &slen) == -1) {
496 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
497 "Error getting socket name");
498 } else {
499 localport = NET_GetPortFromSockaddr((struct sockaddr *)&him);
500 (*env)->SetIntField(env, this, psi_localportID, localport);
501 }
502 }
503 }
504
505 /*
506 * Class: java_net_PlainSocketImpl
507 * Method: socketBind
508 * Signature: (Ljava/net/InetAddress;I)V
509 */
510 JNIEXPORT void JNICALL
511 Java_java_net_PlainSocketImpl_socketBind(JNIEnv *env, jobject this,
512 jobject iaObj, jint localport) {
513
514 /* fdObj is the FileDescriptor field on this */
515 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
516 /* fd is an int field on fdObj */
517 int fd;
518 int len;
519 SOCKADDR him;
520
521 if (IS_NULL(fdObj)) {
522 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
523 "Socket closed");
524 return;
525 } else {
526 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
527 }
528 if (IS_NULL(iaObj)) {
529 JNU_ThrowNullPointerException(env, "iaObj is null.");
530 return;
531 }
532
533 /* bind */
534 if (NET_InetAddressToSockaddr(env, iaObj, localport, (struct sockaddr *)&him, &len, JNI_TRUE) != 0) {
535 return;
536 }
537 setDefaultScopeID(env, (struct sockaddr *)&him);
538
539 if (NET_Bind(fd, (struct sockaddr *)&him, len) < 0) {
540 if (errno == EADDRINUSE || errno == EADDRNOTAVAIL ||
541 errno == EPERM || errno == EACCES) {
542 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "BindException",
543 "Bind failed");
544 } else {
545 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
546 "Bind failed");
547 }
548 return;
549 }
550
551 /* set the address */
552 (*env)->SetObjectField(env, this, psi_addressID, iaObj);
553
554 /* initialize the local port */
555 if (localport == 0) {
556 socklen_t slen = sizeof(him);
557 /* Now that we're a connected socket, let's extract the port number
558 * that the system chose for us and store it in the Socket object.
559 */
560 if (getsockname(fd, (struct sockaddr *)&him, &slen) == -1) {
561 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
562 "Error getting socket name");
563 return;
564 }
565 localport = NET_GetPortFromSockaddr((struct sockaddr *)&him);
566 (*env)->SetIntField(env, this, psi_localportID, localport);
567 } else {
568 (*env)->SetIntField(env, this, psi_localportID, localport);
569 }
570 }
571
572 /*
573 * Class: java_net_PlainSocketImpl
574 * Method: socketListen
575 * Signature: (I)V
576 */
577 JNIEXPORT void JNICALL
578 Java_java_net_PlainSocketImpl_socketListen (JNIEnv *env, jobject this,
579 jint count)
580 {
581 /* this FileDescriptor fd field */
582 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
583 /* fdObj's int fd field */
584 int fd;
585
586 if (IS_NULL(fdObj)) {
587 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
588 "Socket closed");
589 return;
590 } else {
591 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
592 }
593
594 /*
595 * Workaround for bugid 4101691 in Solaris 2.6. See 4106600.
596 * If listen backlog is Integer.MAX_VALUE then subtract 1.
597 */
598 if (count == 0x7fffffff)
599 count -= 1;
600
601 if (listen(fd, count) == -1) {
602 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
603 "Listen failed");
604 }
605 }
606
607 /*
608 * Class: java_net_PlainSocketImpl
609 * Method: socketAccept
610 * Signature: (Ljava/net/SocketImpl;)V
611 */
612 JNIEXPORT void JNICALL
613 Java_java_net_PlainSocketImpl_socketAccept(JNIEnv *env, jobject this,
614 jobject socket)
615 {
616 /* fields on this */
617 int port;
618 jint timeout = (*env)->GetIntField(env, this, psi_timeoutID);
619 jlong prevTime = 0;
620 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
621
622 /* the FileDescriptor field on socket */
623 jobject socketFdObj;
624 /* the InetAddress field on socket */
625 jobject socketAddressObj;
626
627 /* the ServerSocket fd int field on fdObj */
628 jint fd;
629
630 /* accepted fd */
631 jint newfd;
632
633 SOCKADDR him;
634 socklen_t slen = SOCKADDR_LEN;
635
636 if (IS_NULL(fdObj)) {
637 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
638 "Socket closed");
639 return;
640 } else {
641 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
642 }
643 if (IS_NULL(socket)) {
644 JNU_ThrowNullPointerException(env, "socket is null");
645 return;
646 }
647
648 /*
649 * accept connection but ignore ECONNABORTED indicating that
650 * connection was eagerly accepted by the OS but was reset
651 * before accept() was called.
652 *
653 * If accept timeout in place and timeout is adjusted with
654 * each ECONNABORTED or EWOULDBLOCK to ensure that semantics
655 * of timeout are preserved.
656 */
657 for (;;) {
658 int ret;
659
660 /* first usage pick up current time */
661 if (prevTime == 0 && timeout > 0) {
662 prevTime = JVM_CurrentTimeMillis(env, 0);
663 }
664
665 /* passing a timeout of 0 to poll will return immediately,
666 but in the case of ServerSocket 0 means infinite. */
667 if (timeout <= 0) {
668 ret = NET_Timeout(fd, -1);
669 } else {
670 ret = NET_Timeout(fd, timeout);
671 }
672 if (ret == 0) {
673 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
674 "Accept timed out");
675 return;
676 } else if (ret == -1) {
677 if (errno == EBADF) {
678 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
679 } else if (errno == ENOMEM) {
680 JNU_ThrowOutOfMemoryError(env, "NET_Timeout native heap allocation failed");
681 } else {
682 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "Accept failed");
683 }
684 return;
685 }
686
687 newfd = NET_Accept(fd, (struct sockaddr *)&him, &slen);
688
689 /* connection accepted */
690 if (newfd >= 0) {
691 SET_BLOCKING(newfd);
692 break;
693 }
694
695 /* non (ECONNABORTED or EWOULDBLOCK) error */
696 if (!(errno == ECONNABORTED || errno == EWOULDBLOCK)) {
697 break;
698 }
699
700 /* ECONNABORTED or EWOULDBLOCK error so adjust timeout if there is one. */
701 if (timeout) {
702 jlong currTime = JVM_CurrentTimeMillis(env, 0);
703 timeout -= (currTime - prevTime);
704
705 if (timeout <= 0) {
706 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
707 "Accept timed out");
708 return;
709 }
710 prevTime = currTime;
711 }
712 }
713
714 if (newfd < 0) {
715 if (newfd == -2) {
716 JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException",
717 "operation interrupted");
718 } else {
719 if (errno == EINVAL) {
720 errno = EBADF;
721 }
722 if (errno == EBADF) {
723 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
724 } else {
725 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "Accept failed");
726 }
727 }
728 return;
729 }
730
731 /*
732 * fill up the remote peer port and address in the new socket structure.
733 */
734 socketAddressObj = NET_SockaddrToInetAddress(env, (struct sockaddr *)&him, &port);
735 if (socketAddressObj == NULL) {
736 /* should be pending exception */
737 close(newfd);
738 return;
739 }
740
741 /*
742 * Populate SocketImpl.fd.fd
743 */
744 socketFdObj = (*env)->GetObjectField(env, socket, psi_fdID);
745 (*env)->SetIntField(env, socketFdObj, IO_fd_fdID, newfd);
746
747 (*env)->SetObjectField(env, socket, psi_addressID, socketAddressObj);
748 (*env)->SetIntField(env, socket, psi_portID, port);
749 /* also fill up the local port information */
750 port = (*env)->GetIntField(env, this, psi_localportID);
751 (*env)->SetIntField(env, socket, psi_localportID, port);
752 }
753
754
755 /*
756 * Class: java_net_PlainSocketImpl
757 * Method: socketAvailable
758 * Signature: ()I
759 */
760 JNIEXPORT jint JNICALL
761 Java_java_net_PlainSocketImpl_socketAvailable(JNIEnv *env, jobject this) {
762
763 jint ret = -1;
764 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
765 jint fd;
766
767 if (IS_NULL(fdObj)) {
768 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
769 "Socket closed");
770 return -1;
771 } else {
772 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
773 }
774 /* NET_SocketAvailable returns 0 for failure, 1 for success */
775 if (NET_SocketAvailable(fd, &ret) == 0){
776 if (errno == ECONNRESET) {
777 JNU_ThrowByName(env, "sun/net/ConnectionResetException", "");
778 } else {
779 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
780 "ioctl FIONREAD failed");
781 }
782 }
783 return ret;
784 }
785
786 /*
787 * Class: java_net_PlainSocketImpl
788 * Method: socketClose0
789 * Signature: (Z)V
790 */
791 JNIEXPORT void JNICALL
792 Java_java_net_PlainSocketImpl_socketClose0(JNIEnv *env, jobject this,
793 jboolean useDeferredClose) {
794
795 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
796 jint fd;
797
798 if (IS_NULL(fdObj)) {
799 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
800 "socket already closed");
801 return;
802 } else {
803 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
804 }
805 if (fd != -1) {
806 if (useDeferredClose && marker_fd >= 0) {
807 NET_Dup2(marker_fd, fd);
808 } else {
809 (*env)->SetIntField(env, fdObj, IO_fd_fdID, -1);
810 NET_SocketClose(fd);
811 }
812 }
813 }
814
815 /*
816 * Class: java_net_PlainSocketImpl
817 * Method: socketShutdown
818 * Signature: (I)V
819 */
820 JNIEXPORT void JNICALL
821 Java_java_net_PlainSocketImpl_socketShutdown(JNIEnv *env, jobject this,
822 jint howto)
823 {
824
825 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
826 jint fd;
827
828 /*
829 * WARNING: THIS NEEDS LOCKING. ALSO: SHOULD WE CHECK for fd being
830 * -1 already?
831 */
832 if (IS_NULL(fdObj)) {
833 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
834 "socket already closed");
835 return;
836 } else {
837 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
838 }
839 shutdown(fd, howto);
840 }
841
842
843 /*
844 * Class: java_net_PlainSocketImpl
845 * Method: socketSetOption0
846 * Signature: (IZLjava/lang/Object;)V
847 */
848 JNIEXPORT void JNICALL
849 Java_java_net_PlainSocketImpl_socketSetOption0(JNIEnv *env, jobject this,
850 jint cmd, jboolean on,
851 jobject value) {
852 int fd;
853 int level, optname, optlen;
854 union {
855 int i;
856 struct linger ling;
857 } optval;
858
859 /*
860 * Check that socket hasn't been closed
861 */
862 fd = getFD(env, this);
863 if (fd < 0) {
864 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
865 "Socket closed");
866 return;
867 }
868
869 /*
870 * SO_TIMEOUT is a NOOP on Solaris/Linux
871 */
872 if (cmd == java_net_SocketOptions_SO_TIMEOUT) {
873 return;
874 }
875
876 /*
877 * Map the Java level socket option to the platform specific
878 * level and option name.
879 */
880 if (NET_MapSocketOption(cmd, &level, &optname)) {
881 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Invalid option");
882 return;
883 }
884
885 switch (cmd) {
886 case java_net_SocketOptions_SO_SNDBUF :
887 case java_net_SocketOptions_SO_RCVBUF :
888 case java_net_SocketOptions_SO_LINGER :
889 case java_net_SocketOptions_IP_TOS :
890 {
891 jclass cls;
892 jfieldID fid;
893
894 cls = (*env)->FindClass(env, "java/lang/Integer");
895 CHECK_NULL(cls);
896 fid = (*env)->GetFieldID(env, cls, "value", "I");
897 CHECK_NULL(fid);
898
899 if (cmd == java_net_SocketOptions_SO_LINGER) {
900 if (on) {
901 optval.ling.l_onoff = 1;
902 optval.ling.l_linger = (*env)->GetIntField(env, value, fid);
903 } else {
904 optval.ling.l_onoff = 0;
905 optval.ling.l_linger = 0;
906 }
907 optlen = sizeof(optval.ling);
908 } else {
909 optval.i = (*env)->GetIntField(env, value, fid);
910 optlen = sizeof(optval.i);
911 }
912
913 break;
914 }
915
916 /* Boolean -> int */
917 default :
918 optval.i = (on ? 1 : 0);
919 optlen = sizeof(optval.i);
920
921 }
922
923 if (NET_SetSockOpt(fd, level, optname, (const void *)&optval, optlen) < 0) {
924 #if defined(__solaris__) || defined(_AIX)
925 if (errno == EINVAL) {
926 // On Solaris setsockopt will set errno to EINVAL if the socket
927 // is closed. The default error message is then confusing
928 char fullMsg[128];
929 jio_snprintf(fullMsg, sizeof(fullMsg), "Invalid option or socket reset by remote peer");
930 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", fullMsg);
931 return;
932 }
933 #endif /* __solaris__ */
934 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
935 "Error setting socket option");
936 }
937 }
938
939 /*
940 * Class: java_net_PlainSocketImpl
941 * Method: socketGetOption
942 * Signature: (I)I
943 */
944 JNIEXPORT jint JNICALL
945 Java_java_net_PlainSocketImpl_socketGetOption(JNIEnv *env, jobject this,
946 jint cmd, jobject iaContainerObj) {
947
948 int fd;
949 int level, optname, optlen;
950 union {
951 int i;
952 struct linger ling;
953 } optval;
954
955 /*
956 * Check that socket hasn't been closed
957 */
958 fd = getFD(env, this);
959 if (fd < 0) {
960 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
961 "Socket closed");
962 return -1;
963 }
964
965 /*
966 * SO_BINDADDR isn't a socket option
967 */
968 if (cmd == java_net_SocketOptions_SO_BINDADDR) {
969 SOCKADDR him;
970 socklen_t len = 0;
971 int port;
972 jobject iaObj;
973 jclass iaCntrClass;
974 jfieldID iaFieldID;
975
976 len = SOCKADDR_LEN;
977
978 if (getsockname(fd, (struct sockaddr *)&him, &len) < 0) {
979 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
980 "Error getting socket name");
981 return -1;
982 }
983 iaObj = NET_SockaddrToInetAddress(env, (struct sockaddr *)&him, &port);
984 CHECK_NULL_RETURN(iaObj, -1);
985
986 iaCntrClass = (*env)->GetObjectClass(env, iaContainerObj);
987 iaFieldID = (*env)->GetFieldID(env, iaCntrClass, "addr", "Ljava/net/InetAddress;");
988 CHECK_NULL_RETURN(iaFieldID, -1);
989 (*env)->SetObjectField(env, iaContainerObj, iaFieldID, iaObj);
990 return 0; /* notice change from before */
991 }
992
993 /*
994 * Map the Java level socket option to the platform specific
995 * level and option name.
996 */
997 if (NET_MapSocketOption(cmd, &level, &optname)) {
998 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Invalid option");
999 return -1;
1000 }
1001
1002 /*
1003 * Args are int except for SO_LINGER
1004 */
1005 if (cmd == java_net_SocketOptions_SO_LINGER) {
1006 optlen = sizeof(optval.ling);
1007 } else {
1008 optlen = sizeof(optval.i);
1009 }
1010
1011 if (NET_GetSockOpt(fd, level, optname, (void *)&optval, &optlen) < 0) {
1012 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1013 "Error getting socket option");
1014 return -1;
1015 }
1016
1017 switch (cmd) {
1018 case java_net_SocketOptions_SO_LINGER:
1019 return (optval.ling.l_onoff ? optval.ling.l_linger: -1);
1020
1021 case java_net_SocketOptions_SO_SNDBUF:
1022 case java_net_SocketOptions_SO_RCVBUF:
1023 case java_net_SocketOptions_IP_TOS:
1024 return optval.i;
1025
1026 default :
1027 return (optval.i == 0) ? -1 : 1;
1028 }
1029 }
1030
1031
1032 /*
1033 * Class: java_net_PlainSocketImpl
1034 * Method: socketSendUrgentData
1035 * Signature: (B)V
1036 */
1037 JNIEXPORT void JNICALL
1038 Java_java_net_PlainSocketImpl_socketSendUrgentData(JNIEnv *env, jobject this,
1039 jint data) {
1040 /* The fd field */
1041 jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
1042 int n, fd;
1043 unsigned char d = data & 0xFF;
1044
1045 if (IS_NULL(fdObj)) {
1046 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
1047 return;
1048 } else {
1049 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
1050 /* Bug 4086704 - If the Socket associated with this file descriptor
1051 * was closed (sysCloseFD), the file descriptor is set to -1.
1052 */
1053 if (fd == -1) {
1054 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
1055 return;
1056 }
1057
1058 }
1059 n = NET_Send(fd, (char *)&d, 1, MSG_OOB);
1060 if (n == -1) {
1061 NET_ThrowByNameWithLastError(env, "java/io/IOException", "Write failed");
1062 }
1063 }