1 /*
2 * Copyright (c) 1997, 2013, 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 <winsock2.h>
27 #include <ws2tcpip.h>
28
29 #include "net_util.h"
30 #include "jni.h"
31
32 // Taken from mstcpip.h in Windows SDK 8.0 or newer.
33 #define SIO_LOOPBACK_FAST_PATH _WSAIOW(IOC_VENDOR,16)
34
35 #ifndef IPTOS_TOS_MASK
36 #define IPTOS_TOS_MASK 0x1e
37 #endif
38 #ifndef IPTOS_PREC_MASK
39 #define IPTOS_PREC_MASK 0xe0
40 #endif
41
42 /* true if SO_RCVTIMEO is supported */
43 jboolean isRcvTimeoutSupported = JNI_TRUE;
44
45 /*
46 * Table of Windows Sockets errors, the specific exception we
47 * throw for the error, and the error text.
48 *
49 * Note that this table excludes OS dependent errors.
50 *
51 * Latest list of Windows Sockets errors can be found at :-
52 * http://msdn.microsoft.com/library/psdk/winsock/errors_3wc2.htm
53 */
54 static struct {
55 int errCode;
56 const char *exc;
57 const char *errString;
58 } const winsock_errors[] = {
59 { WSAEACCES, 0, "Permission denied" },
60 { WSAEADDRINUSE, "BindException", "Address already in use" },
61 { WSAEADDRNOTAVAIL, "BindException", "Cannot assign requested address" },
62 { WSAEAFNOSUPPORT, 0, "Address family not supported by protocol family" },
63 { WSAEALREADY, 0, "Operation already in progress" },
64 { WSAECONNABORTED, 0, "Software caused connection abort" },
65 { WSAECONNREFUSED, "ConnectException", "Connection refused" },
66 { WSAECONNRESET, 0, "Connection reset by peer" },
67 { WSAEDESTADDRREQ, 0, "Destination address required" },
68 { WSAEFAULT, 0, "Bad address" },
69 { WSAEHOSTDOWN, 0, "Host is down" },
70 { WSAEHOSTUNREACH, "NoRouteToHostException", "No route to host" },
71 { WSAEINPROGRESS, 0, "Operation now in progress" },
72 { WSAEINTR, 0, "Interrupted function call" },
73 { WSAEINVAL, 0, "Invalid argument" },
74 { WSAEISCONN, 0, "Socket is already connected" },
75 { WSAEMFILE, 0, "Too many open files" },
76 { WSAEMSGSIZE, 0, "The message is larger than the maximum supported by the underlying transport" },
77 { WSAENETDOWN, 0, "Network is down" },
78 { WSAENETRESET, 0, "Network dropped connection on reset" },
79 { WSAENETUNREACH, 0, "Network is unreachable" },
80 { WSAENOBUFS, 0, "No buffer space available (maximum connections reached?)" },
81 { WSAENOPROTOOPT, 0, "Bad protocol option" },
82 { WSAENOTCONN, 0, "Socket is not connected" },
83 { WSAENOTSOCK, 0, "Socket operation on nonsocket" },
84 { WSAEOPNOTSUPP, 0, "Operation not supported" },
85 { WSAEPFNOSUPPORT, 0, "Protocol family not supported" },
86 { WSAEPROCLIM, 0, "Too many processes" },
87 { WSAEPROTONOSUPPORT, 0, "Protocol not supported" },
88 { WSAEPROTOTYPE, 0, "Protocol wrong type for socket" },
89 { WSAESHUTDOWN, 0, "Cannot send after socket shutdown" },
90 { WSAESOCKTNOSUPPORT, 0, "Socket type not supported" },
91 { WSAETIMEDOUT, "ConnectException", "Connection timed out" },
92 { WSATYPE_NOT_FOUND, 0, "Class type not found" },
93 { WSAEWOULDBLOCK, 0, "Resource temporarily unavailable" },
94 { WSAHOST_NOT_FOUND, 0, "Host not found" },
95 { WSA_NOT_ENOUGH_MEMORY, 0, "Insufficient memory available" },
96 { WSANOTINITIALISED, 0, "Successful WSAStartup not yet performed" },
97 { WSANO_DATA, 0, "Valid name, no data record of requested type" },
98 { WSANO_RECOVERY, 0, "This is a nonrecoverable error" },
99 { WSASYSNOTREADY, 0, "Network subsystem is unavailable" },
100 { WSATRY_AGAIN, 0, "Nonauthoritative host not found" },
101 { WSAVERNOTSUPPORTED, 0, "Winsock.dll version out of range" },
102 { WSAEDISCON, 0, "Graceful shutdown in progress" },
103 { WSA_OPERATION_ABORTED, 0, "Overlapped operation aborted" },
104 };
105
106 /*
107 * Initialize Windows Sockets API support
108 */
109 BOOL WINAPI
110 DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved)
111 {
112 WSADATA wsadata;
113
114 switch (reason) {
115 case DLL_PROCESS_ATTACH:
116 if (WSAStartup(MAKEWORD(2,2), &wsadata) != 0) {
117 return FALSE;
118 }
119 break;
120
121 case DLL_PROCESS_DETACH:
122 WSACleanup();
123 break;
124
125 default:
126 break;
127 }
128 return TRUE;
129 }
130
131 void platformInit() {}
132 void parseExclusiveBindProperty(JNIEnv *env) {}
133
134 /*
135 * Since winsock doesn't have the equivalent of strerror(errno)
136 * use table to lookup error text for the error.
137 */
138 JNIEXPORT void JNICALL
139 NET_ThrowNew(JNIEnv *env, int errorNum, char *msg)
140 {
141 int i;
142 int table_size = sizeof(winsock_errors) /
143 sizeof(winsock_errors[0]);
144 char exc[256];
145 char fullMsg[256];
146 char *excP = NULL;
147
148 /*
149 * If exception already throw then don't overwrite it.
150 */
151 if ((*env)->ExceptionOccurred(env)) {
152 return;
153 }
154
155 /*
156 * Default message text if not provided
157 */
158 if (!msg) {
159 msg = "no further information";
160 }
161
162 /*
163 * Check table for known winsock errors
164 */
165 i=0;
166 while (i < table_size) {
167 if (errorNum == winsock_errors[i].errCode) {
168 break;
169 }
170 i++;
171 }
172
173 /*
174 * If found get pick the specific exception and error
175 * message corresponding to this error.
176 */
177 if (i < table_size) {
178 excP = (char *)winsock_errors[i].exc;
179 jio_snprintf(fullMsg, sizeof(fullMsg), "%s: %s",
180 (char *)winsock_errors[i].errString, msg);
181 } else {
182 jio_snprintf(fullMsg, sizeof(fullMsg),
183 "Unrecognized Windows Sockets error: %d: %s",
184 errorNum, msg);
185
186 }
187
188 /*
189 * Throw SocketException if no specific exception for this
190 * error.
191 */
192 if (excP == NULL) {
193 excP = "SocketException";
194 }
195 sprintf(exc, "%s%s", JNU_JAVANETPKG, excP);
196 JNU_ThrowByName(env, exc, fullMsg);
197 }
198
199 void
200 NET_ThrowCurrent(JNIEnv *env, char *msg)
201 {
202 NET_ThrowNew(env, WSAGetLastError(), msg);
203 }
204
205 void
206 NET_ThrowSocketException(JNIEnv *env, char* msg)
207 {
208 static jclass cls = NULL;
209 if (cls == NULL) {
210 cls = (*env)->FindClass(env, "java/net/SocketException");
211 CHECK_NULL(cls);
212 cls = (*env)->NewGlobalRef(env, cls);
213 CHECK_NULL(cls);
214 }
215 (*env)->ThrowNew(env, cls, msg);
216 }
217
218 void
219 NET_ThrowByNameWithLastError(JNIEnv *env, const char *name,
220 const char *defaultDetail) {
221 char errmsg[255];
222 sprintf(errmsg, "errno: %d, error: %s\n", WSAGetLastError(), defaultDetail);
223 JNU_ThrowByNameWithLastError(env, name, errmsg);
224 }
225
226 jfieldID
227 NET_GetFileDescriptorID(JNIEnv *env)
228 {
229 jclass cls = (*env)->FindClass(env, "java/io/FileDescriptor");
230 CHECK_NULL_RETURN(cls, NULL);
231 return (*env)->GetFieldID(env, cls, "fd", "I");
232 }
233
234 jint IPv6_supported()
235 {
236 SOCKET s = socket(AF_INET6, SOCK_STREAM, 0) ;
237 if (s == INVALID_SOCKET) {
238 return JNI_FALSE;
239 }
240 closesocket(s);
241
242 return JNI_TRUE;
243 }
244
245 /*
246 * Return the default TOS value
247 */
248 int NET_GetDefaultTOS() {
249 static int default_tos = -1;
250 OSVERSIONINFO ver;
251 HKEY hKey;
252 LONG ret;
253
254 /*
255 * If default ToS already determined then return it
256 */
257 if (default_tos >= 0) {
258 return default_tos;
259 }
260
261 /*
262 * Assume default is "normal service"
263 */
264 default_tos = 0;
265
266 /*
267 * Which OS is this?
268 */
269 ver.dwOSVersionInfoSize = sizeof(ver);
270 GetVersionEx(&ver);
271
272 /*
273 * If 2000 or greater then no default ToS in registry
274 */
275 if (ver.dwPlatformId == VER_PLATFORM_WIN32_NT) {
276 if (ver.dwMajorVersion >= 5) {
277 return default_tos;
278 }
279 }
280
281 /*
282 * Query the registry to see if a Default ToS has been set.
283 * Different registry entry for NT vs 95/98/ME.
284 */
285 if (ver.dwPlatformId == VER_PLATFORM_WIN32_NT) {
286 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
287 "SYSTEM\\CurrentControlSet\\Services\\Tcp\\Parameters",
288 0, KEY_READ, (PHKEY)&hKey);
289 } else {
290 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
291 "SYSTEM\\CurrentControlSet\\Services\\VxD\\MSTCP\\Parameters",
292 0, KEY_READ, (PHKEY)&hKey);
293 }
294 if (ret == ERROR_SUCCESS) {
295 DWORD dwLen;
296 DWORD dwDefaultTOS;
297 ULONG ulType;
298 dwLen = sizeof(dwDefaultTOS);
299
300 ret = RegQueryValueEx(hKey, "DefaultTOS", NULL, &ulType,
301 (LPBYTE)&dwDefaultTOS, &dwLen);
302 RegCloseKey(hKey);
303 if (ret == ERROR_SUCCESS) {
304 default_tos = (int)dwDefaultTOS;
305 }
306 }
307 return default_tos;
308 }
309
310 /* call NET_MapSocketOptionV6 for the IPv6 fd only
311 * and NET_MapSocketOption for the IPv4 fd
312 */
313 JNIEXPORT int JNICALL
314 NET_MapSocketOptionV6(jint cmd, int *level, int *optname) {
315
316 switch (cmd) {
317 case java_net_SocketOptions_IP_MULTICAST_IF:
318 case java_net_SocketOptions_IP_MULTICAST_IF2:
319 *level = IPPROTO_IPV6;
320 *optname = IPV6_MULTICAST_IF;
321 return 0;
322
323 case java_net_SocketOptions_IP_MULTICAST_LOOP:
324 *level = IPPROTO_IPV6;
325 *optname = IPV6_MULTICAST_LOOP;
326 return 0;
327 }
328 return NET_MapSocketOption (cmd, level, optname);
329 }
330
331 /*
332 * Map the Java level socket option to the platform specific
333 * level and option name.
334 */
335
336 JNIEXPORT int JNICALL
337 NET_MapSocketOption(jint cmd, int *level, int *optname) {
338
339 typedef struct {
340 jint cmd;
341 int level;
342 int optname;
343 } sockopts;
344
345 static sockopts opts[] = {
346 { java_net_SocketOptions_TCP_NODELAY, IPPROTO_TCP, TCP_NODELAY },
347 { java_net_SocketOptions_SO_OOBINLINE, SOL_SOCKET, SO_OOBINLINE },
348 { java_net_SocketOptions_SO_LINGER, SOL_SOCKET, SO_LINGER },
349 { java_net_SocketOptions_SO_SNDBUF, SOL_SOCKET, SO_SNDBUF },
350 { java_net_SocketOptions_SO_RCVBUF, SOL_SOCKET, SO_RCVBUF },
351 { java_net_SocketOptions_SO_KEEPALIVE, SOL_SOCKET, SO_KEEPALIVE },
352 { java_net_SocketOptions_SO_REUSEADDR, SOL_SOCKET, SO_REUSEADDR },
353 { java_net_SocketOptions_SO_BROADCAST, SOL_SOCKET, SO_BROADCAST },
354 { java_net_SocketOptions_IP_MULTICAST_IF, IPPROTO_IP, IP_MULTICAST_IF },
355 { java_net_SocketOptions_IP_MULTICAST_LOOP, IPPROTO_IP, IP_MULTICAST_LOOP },
356 { java_net_SocketOptions_IP_TOS, IPPROTO_IP, IP_TOS },
357
358 };
359
360
361 int i;
362
363 /*
364 * Map the Java level option to the native level
365 */
366 for (i=0; i<(int)(sizeof(opts) / sizeof(opts[0])); i++) {
367 if (cmd == opts[i].cmd) {
368 *level = opts[i].level;
369 *optname = opts[i].optname;
370 return 0;
371 }
372 }
373
374 /* not found */
375 return -1;
376 }
377
378
379 /*
380 * Wrapper for setsockopt dealing with Windows specific issues :-
381 *
382 * IP_TOS and IP_MULTICAST_LOOP can't be set on some Windows
383 * editions.
384 *
385 * The value for the type-of-service (TOS) needs to be masked
386 * to get consistent behaviour with other operating systems.
387 */
388 JNIEXPORT int JNICALL
389 NET_SetSockOpt(int s, int level, int optname, const void *optval,
390 int optlen)
391 {
392 int rv = 0;
393 int parg = 0;
394 int plen = sizeof(parg);
395
396 if (level == IPPROTO_IP && optname == IP_TOS) {
397 int *tos = (int *)optval;
398 *tos &= (IPTOS_TOS_MASK | IPTOS_PREC_MASK);
399 }
400
401 if (optname == SO_REUSEADDR) {
402 /*
403 * Do not set SO_REUSEADDE if SO_EXCLUSIVEADDUSE is already set
404 */
405 rv = NET_GetSockOpt(s, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *)&parg, &plen);
406 if (rv == 0 && parg == 1) {
407 return rv;
408 }
409 }
410
411 rv = setsockopt(s, level, optname, optval, optlen);
412
413 if (rv == SOCKET_ERROR) {
414 /*
415 * IP_TOS & IP_MULTICAST_LOOP can't be set on some versions
416 * of Windows.
417 */
418 if ((WSAGetLastError() == WSAENOPROTOOPT) &&
419 (level == IPPROTO_IP) &&
420 (optname == IP_TOS || optname == IP_MULTICAST_LOOP)) {
421 rv = 0;
422 }
423
424 /*
425 * IP_TOS can't be set on unbound UDP sockets.
426 */
427 if ((WSAGetLastError() == WSAEINVAL) &&
428 (level == IPPROTO_IP) &&
429 (optname == IP_TOS)) {
430 rv = 0;
431 }
432 }
433
434 return rv;
435 }
436
437 /*
438 * Wrapper for setsockopt dealing with Windows specific issues :-
439 *
440 * IP_TOS is not supported on some versions of Windows so
441 * instead return the default value for the OS.
442 */
443 JNIEXPORT int JNICALL
444 NET_GetSockOpt(int s, int level, int optname, void *optval,
445 int *optlen)
446 {
447 int rv;
448
449 if (level == IPPROTO_IPV6 && optname == IPV6_TCLASS) {
450 int *intopt = (int *)optval;
451 *intopt = 0;
452 *optlen = sizeof(*intopt);
453 return 0;
454 }
455
456 rv = getsockopt(s, level, optname, optval, optlen);
457
458
459 /*
460 * IPPROTO_IP/IP_TOS is not supported on some Windows
461 * editions so return the default type-of-service
462 * value.
463 */
464 if (rv == SOCKET_ERROR) {
465
466 if (WSAGetLastError() == WSAENOPROTOOPT &&
467 level == IPPROTO_IP && optname == IP_TOS) {
468
469 int *tos;
470 tos = (int *)optval;
471 *tos = NET_GetDefaultTOS();
472
473 rv = 0;
474 }
475 }
476
477 return rv;
478 }
479
480 /*
481 * Sets SO_ECLUSIVEADDRUSE if SO_REUSEADDR is not already set.
482 */
483 void setExclusiveBind(int fd) {
484 int parg = 0;
485 int plen = sizeof(parg);
486 int rv = 0;
487 rv = NET_GetSockOpt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&parg, &plen);
488 if (rv == 0 && parg == 0) {
489 parg = 1;
490 rv = NET_SetSockOpt(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char*)&parg, plen);
491 }
492 }
493
494 /*
495 * Wrapper for bind winsock call - transparent converts an
496 * error related to binding to a port that has exclusive access
497 * into an error indicating the port is in use (facilitates
498 * better error reporting).
499 *
500 * Should be only called by the wrapper method NET_WinBind
501 */
502 JNIEXPORT int JNICALL
503 NET_Bind(int s, struct sockaddr *him, int len)
504 {
505 int rv = 0;
506 rv = bind(s, him, len);
507
508 if (rv == SOCKET_ERROR) {
509 /*
510 * If bind fails with WSAEACCES it means that a privileged
511 * process has done an exclusive bind (NT SP4/2000/XP only).
512 */
513 if (WSAGetLastError() == WSAEACCES) {
514 WSASetLastError(WSAEADDRINUSE);
515 }
516 }
517
518 return rv;
519 }
520
521 /*
522 * Wrapper for NET_Bind call. Sets SO_EXCLUSIVEADDRUSE
523 * if required, and then calls NET_BIND
524 */
525 JNIEXPORT int JNICALL
526 NET_WinBind(int s, struct sockaddr *him, int len, jboolean exclBind)
527 {
528 if (exclBind == JNI_TRUE)
529 setExclusiveBind(s);
530 return NET_Bind(s, him, len);
531 }
532
533 JNIEXPORT int JNICALL
534 NET_SocketClose(int fd) {
535 struct linger l = {0, 0};
536 int ret = 0;
537 int len = sizeof (l);
538 if (getsockopt(fd, SOL_SOCKET, SO_LINGER, (char *)&l, &len) == 0) {
539 if (l.l_onoff == 0) {
540 WSASendDisconnect(fd, NULL);
541 }
542 }
543 ret = closesocket (fd);
544 return ret;
545 }
546
547 JNIEXPORT int JNICALL
548 NET_Timeout(int fd, long timeout) {
549 int ret;
550 fd_set tbl;
551 struct timeval t;
552 t.tv_sec = timeout / 1000;
553 t.tv_usec = (timeout % 1000) * 1000;
554 FD_ZERO(&tbl);
555 FD_SET(fd, &tbl);
556 ret = select (fd + 1, &tbl, 0, 0, &t);
557 return ret;
558 }
559
560
561 /*
562 * differs from NET_Timeout() as follows:
563 *
564 * If timeout = -1, it blocks forever.
565 *
566 * returns 1 or 2 depending if only one or both sockets
567 * fire at same time.
568 *
569 * *fdret is (one of) the active fds. If both sockets
570 * fire at same time, *fdret = fd always.
571 */
572 JNIEXPORT int JNICALL
573 NET_Timeout2(int fd, int fd1, long timeout, int *fdret) {
574 int ret;
575 fd_set tbl;
576 struct timeval t, *tP = &t;
577 if (timeout == -1) {
578 tP = 0;
579 } else {
580 t.tv_sec = timeout / 1000;
581 t.tv_usec = (timeout % 1000) * 1000;
582 }
583 FD_ZERO(&tbl);
584 FD_SET(fd, &tbl);
585 FD_SET(fd1, &tbl);
586 ret = select (0, &tbl, 0, 0, tP);
587 switch (ret) {
588 case 0:
589 return 0; /* timeout */
590 case 1:
591 if (FD_ISSET (fd, &tbl)) {
592 *fdret= fd;
593 } else {
594 *fdret= fd1;
595 }
596 return 1;
597 case 2:
598 *fdret= fd;
599 return 2;
600 }
601 return -1;
602 }
603
604
605 void dumpAddr (char *str, void *addr) {
606 struct SOCKADDR_IN6 *a = (struct SOCKADDR_IN6 *)addr;
607 int family = a->sin6_family;
608 printf ("%s\n", str);
609 if (family == AF_INET) {
610 struct sockaddr_in *him = (struct sockaddr_in *)addr;
611 printf ("AF_INET: port %d: %x\n", ntohs(him->sin_port),
612 ntohl(him->sin_addr.s_addr));
613 } else {
614 int i;
615 struct in6_addr *in = &a->sin6_addr;
616 printf ("AF_INET6 ");
617 printf ("port %d ", ntohs (a->sin6_port));
618 printf ("flow %d ", a->sin6_flowinfo);
619 printf ("addr ");
620 for (i=0; i<7; i++) {
621 printf ("%04x:", ntohs(in->s6_words[i]));
622 }
623 printf ("%04x", ntohs(in->s6_words[7]));
624 printf (" scope %d\n", a->sin6_scope_id);
625 }
626 }
627
628 /* Macro, which cleans-up the iv6bind structure,
629 * closes the two sockets (if open),
630 * and returns SOCKET_ERROR. Used in NET_BindV6 only.
631 */
632
633 #define CLOSE_SOCKETS_AND_RETURN do { \
634 if (fd != -1) { \
635 closesocket (fd); \
636 fd = -1; \
637 } \
638 if (ofd != -1) { \
639 closesocket (ofd); \
640 ofd = -1; \
641 } \
642 if (close_fd != -1) { \
643 closesocket (close_fd); \
644 close_fd = -1; \
645 } \
646 if (close_ofd != -1) { \
647 closesocket (close_ofd); \
648 close_ofd = -1; \
649 } \
650 b->ipv4_fd = b->ipv6_fd = -1; \
651 return SOCKET_ERROR; \
652 } while(0)
653
654 /*
655 * if ipv6 is available, call NET_BindV6 to bind to the required address/port.
656 * Because the same port number may need to be reserved in both v4 and v6 space,
657 * this may require socket(s) to be re-opened. Therefore, all of this information
658 * is passed in and returned through the ipv6bind structure.
659 *
660 * If the request is to bind to a specific address, then this (by definition) means
661 * only bind in either v4 or v6, and this is just the same as normal. ie. a single
662 * call to bind() will suffice. The other socket is closed in this case.
663 *
664 * The more complicated case is when the requested address is ::0 or 0.0.0.0.
665 *
666 * Two further cases:
667 * 2. If the reqeusted port is 0 (ie. any port) then we try to bind in v4 space
668 * first with a wild-card port argument. We then try to bind in v6 space
669 * using the returned port number. If this fails, we repeat the process
670 * until a free port common to both spaces becomes available.
671 *
672 * 3. If the requested port is a specific port, then we just try to get that
673 * port in both spaces, and if it is not free in both, then the bind fails.
674 *
675 * On failure, sockets are closed and an error returned with CLOSE_SOCKETS_AND_RETURN
676 */
677
678 JNIEXPORT int JNICALL
679 NET_BindV6(struct ipv6bind* b, jboolean exclBind) {
680 int fd=-1, ofd=-1, rv, len;
681 /* need to defer close until new sockets created */
682 int close_fd=-1, close_ofd=-1;
683 SOCKETADDRESS oaddr; /* other address to bind */
684 int family = b->addr->him.sa_family;
685 int ofamily;
686 u_short port; /* requested port parameter */
687 u_short bound_port;
688
689 if (family == AF_INET && (b->addr->him4.sin_addr.s_addr != INADDR_ANY)) {
690 /* bind to v4 only */
691 int ret;
692 ret = NET_WinBind ((int)b->ipv4_fd, (struct sockaddr *)b->addr,
693 sizeof (struct sockaddr_in), exclBind);
694 if (ret == SOCKET_ERROR) {
695 CLOSE_SOCKETS_AND_RETURN;
696 }
697 closesocket (b->ipv6_fd);
698 b->ipv6_fd = -1;
699 return 0;
700 }
701 if (family == AF_INET6 && (!IN6_IS_ADDR_ANY(&b->addr->him6.sin6_addr))) {
702 /* bind to v6 only */
703 int ret;
704 ret = NET_WinBind ((int)b->ipv6_fd, (struct sockaddr *)b->addr,
705 sizeof (struct SOCKADDR_IN6), exclBind);
706 if (ret == SOCKET_ERROR) {
707 CLOSE_SOCKETS_AND_RETURN;
708 }
709 closesocket (b->ipv4_fd);
710 b->ipv4_fd = -1;
711 return 0;
712 }
713
714 /* We need to bind on both stacks, with the same port number */
715
716 memset (&oaddr, 0, sizeof(oaddr));
717 if (family == AF_INET) {
718 ofamily = AF_INET6;
719 fd = (int)b->ipv4_fd;
720 ofd = (int)b->ipv6_fd;
721 port = (u_short)GET_PORT (b->addr);
722 IN6ADDR_SETANY (&oaddr.him6);
723 oaddr.him6.sin6_port = port;
724 } else {
725 ofamily = AF_INET;
726 ofd = (int)b->ipv4_fd;
727 fd = (int)b->ipv6_fd;
728 port = (u_short)GET_PORT (b->addr);
729 oaddr.him4.sin_family = AF_INET;
730 oaddr.him4.sin_port = port;
731 oaddr.him4.sin_addr.s_addr = INADDR_ANY;
732 }
733
734 rv = NET_WinBind(fd, (struct sockaddr *)b->addr, SOCKETADDRESS_LEN(b->addr), exclBind);
735 if (rv == SOCKET_ERROR) {
736 CLOSE_SOCKETS_AND_RETURN;
737 }
738
739 /* get the port and set it in the other address */
740 len = SOCKETADDRESS_LEN(b->addr);
741 if (getsockname(fd, (struct sockaddr *)b->addr, &len) == -1) {
742 CLOSE_SOCKETS_AND_RETURN;
743 }
744 bound_port = GET_PORT (b->addr);
745 SET_PORT (&oaddr, bound_port);
746 if ((rv=NET_WinBind (ofd, (struct sockaddr *) &oaddr,
747 SOCKETADDRESS_LEN (&oaddr), exclBind)) == SOCKET_ERROR) {
748 int retries;
749 int sotype, arglen=sizeof(sotype);
750
751 /* no retries unless, the request was for any free port */
752
753 if (port != 0) {
754 CLOSE_SOCKETS_AND_RETURN;
755 }
756
757 getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *)&sotype, &arglen);
758
759 #define SOCK_RETRIES 50
760 /* 50 is an arbitrary limit, just to ensure that this
761 * cannot be an endless loop. Would expect socket creation to
762 * succeed sooner.
763 */
764 for (retries = 0; retries < SOCK_RETRIES; retries ++) {
765 int len;
766 close_fd = fd; fd = -1;
767 close_ofd = ofd; ofd = -1;
768 b->ipv4_fd = SOCKET_ERROR;
769 b->ipv6_fd = SOCKET_ERROR;
770
771 /* create two new sockets */
772 fd = (int)socket (family, sotype, 0);
773 if (fd == SOCKET_ERROR) {
774 CLOSE_SOCKETS_AND_RETURN;
775 }
776 ofd = (int)socket (ofamily, sotype, 0);
777 if (ofd == SOCKET_ERROR) {
778 CLOSE_SOCKETS_AND_RETURN;
779 }
780
781 /* bind random port on first socket */
782 SET_PORT (&oaddr, 0);
783 rv = NET_WinBind (ofd, (struct sockaddr *)&oaddr, SOCKETADDRESS_LEN(&oaddr),
784 exclBind);
785 if (rv == SOCKET_ERROR) {
786 CLOSE_SOCKETS_AND_RETURN;
787 }
788 /* close the original pair of sockets before continuing */
789 closesocket (close_fd);
790 closesocket (close_ofd);
791 close_fd = close_ofd = -1;
792
793 /* bind new port on second socket */
794 len = SOCKETADDRESS_LEN(&oaddr);
795 if (getsockname(ofd, (struct sockaddr *)&oaddr, &len) == -1) {
796 CLOSE_SOCKETS_AND_RETURN;
797 }
798 bound_port = GET_PORT (&oaddr);
799 SET_PORT (b->addr, bound_port);
800 rv = NET_WinBind (fd, (struct sockaddr *)b->addr, SOCKETADDRESS_LEN(b->addr),
801 exclBind);
802
803 if (rv != SOCKET_ERROR) {
804 if (family == AF_INET) {
805 b->ipv4_fd = fd;
806 b->ipv6_fd = ofd;
807 } else {
808 b->ipv4_fd = ofd;
809 b->ipv6_fd = fd;
810 }
811 return 0;
812 }
813 }
814 CLOSE_SOCKETS_AND_RETURN;
815 }
816 return 0;
817 }
818
819 /*
820 * Determine the default interface for an IPv6 address.
821 *
822 * Returns :-
823 * 0 if error
824 * > 0 interface index to use
825 */
826 jint getDefaultIPv6Interface(JNIEnv *env, struct SOCKADDR_IN6 *target_addr)
827 {
828 int ret;
829 DWORD b;
830 struct sockaddr_in6 route;
831 SOCKET fd = socket(AF_INET6, SOCK_STREAM, 0);
832 if (fd == INVALID_SOCKET) {
833 return 0;
834 }
835
836 ret = WSAIoctl(fd, SIO_ROUTING_INTERFACE_QUERY,
837 (void *)target_addr, sizeof(struct sockaddr_in6),
838 (void *)&route, sizeof(struct sockaddr_in6),
839 &b, 0, 0);
840 if (ret == SOCKET_ERROR) {
841 // error
842 closesocket(fd);
843 return 0;
844 } else {
845 closesocket(fd);
846 return route.sin6_scope_id;
847 }
848 }
849
850 /**
851 * Enables SIO_LOOPBACK_FAST_PATH
852 */
853 JNIEXPORT jint JNICALL
854 NET_EnableFastTcpLoopback(int fd) {
855 int enabled = 1;
856 DWORD result_byte_count = -1;
857 int result = WSAIoctl(fd,
858 SIO_LOOPBACK_FAST_PATH,
859 &enabled,
860 sizeof(enabled),
861 NULL,
862 0,
863 &result_byte_count,
864 NULL,
865 NULL);
866 return result == SOCKET_ERROR ? WSAGetLastError() : 0;
867 }
868
869 /* If address types is IPv6, then IPv6 must be available. Otherwise
870 * no address can be generated. In the case of an IPv4 Inetaddress this
871 * method will return an IPv4 mapped address where IPv6 is available and
872 * v4MappedAddress is TRUE. Otherwise it will return a sockaddr_in
873 * structure for an IPv4 InetAddress.
874 */
875 JNIEXPORT int JNICALL
876 NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port, struct sockaddr *him,
877 int *len, jboolean v4MappedAddress) {
878 jint family, iafam;
879 iafam = getInetAddress_family(env, iaObj);
880 family = (iafam == IPv4)? AF_INET : AF_INET6;
881 if (ipv6_available() && !(family == AF_INET && v4MappedAddress == JNI_FALSE)) {
882 struct SOCKADDR_IN6 *him6 = (struct SOCKADDR_IN6 *)him;
883 jbyte caddr[16];
884 jint address, scopeid = 0;
885 jint cached_scope_id = 0;
886
887 if (family == AF_INET) { /* will convert to IPv4-mapped address */
888 memset((char *) caddr, 0, 16);
889 address = getInetAddress_addr(env, iaObj);
890 if (address == INADDR_ANY) {
891 /* we would always prefer IPv6 wildcard address
892 caddr[10] = 0xff;
893 caddr[11] = 0xff; */
894 } else {
895 caddr[10] = 0xff;
896 caddr[11] = 0xff;
897 caddr[12] = ((address >> 24) & 0xff);
898 caddr[13] = ((address >> 16) & 0xff);
899 caddr[14] = ((address >> 8) & 0xff);
900 caddr[15] = (address & 0xff);
901 }
902 } else {
903 getInet6Address_ipaddress(env, iaObj, (char *)caddr);
904 scopeid = getInet6Address_scopeid(env, iaObj);
905 cached_scope_id = (jint)(*env)->GetIntField(env, iaObj, ia6_cachedscopeidID);
906 }
907
908 memset((char *)him6, 0, sizeof(struct SOCKADDR_IN6));
909 him6->sin6_port = (u_short) htons((u_short)port);
910 memcpy((void *)&(him6->sin6_addr), caddr, sizeof(struct in6_addr) );
911 him6->sin6_family = AF_INET6;
912 if ((family == AF_INET6) && IN6_IS_ADDR_LINKLOCAL( &(him6->sin6_addr) )
913 && (!scopeid && !cached_scope_id)) {
914 cached_scope_id = getDefaultIPv6Interface(env, him6);
915 (*env)->SetIntField(env, iaObj, ia6_cachedscopeidID, cached_scope_id);
916 }
917 him6->sin6_scope_id = scopeid != 0 ? scopeid : cached_scope_id;
918 *len = sizeof(struct SOCKADDR_IN6) ;
919 } else {
920 struct sockaddr_in *him4 = (struct sockaddr_in*)him;
921 jint address;
922 if (family != AF_INET) {
923 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Protocol family unavailable");
924 return -1;
925 }
926 memset((char *) him4, 0, sizeof(struct sockaddr_in));
927 address = getInetAddress_addr(env, iaObj);
928 him4->sin_port = htons((short) port);
929 him4->sin_addr.s_addr = (u_long) htonl(address);
930 him4->sin_family = AF_INET;
931 *len = sizeof(struct sockaddr_in);
932 }
933 return 0;
934 }
935
936 JNIEXPORT jint JNICALL
937 NET_GetPortFromSockaddr(struct sockaddr *him) {
938 if (him->sa_family == AF_INET6) {
939 return ntohs(((struct sockaddr_in6*)him)->sin6_port);
940 } else {
941 return ntohs(((struct sockaddr_in*)him)->sin_port);
942 }
943 }
944
945 int
946 NET_IsIPv4Mapped(jbyte* caddr) {
947 int i;
948 for (i = 0; i < 10; i++) {
949 if (caddr[i] != 0x00) {
950 return 0; /* false */
951 }
952 }
953
954 if (((caddr[10] & 0xff) == 0xff) && ((caddr[11] & 0xff) == 0xff)) {
955 return 1; /* true */
956 }
957 return 0; /* false */
958 }
959
960 int
961 NET_IPv4MappedToIPv4(jbyte* caddr) {
962 return ((caddr[12] & 0xff) << 24) | ((caddr[13] & 0xff) << 16) | ((caddr[14] & 0xff) << 8)
963 | (caddr[15] & 0xff);
964 }
965
966 int
967 NET_IsEqual(jbyte* caddr1, jbyte* caddr2) {
968 int i;
969 for (i = 0; i < 16; i++) {
970 if (caddr1[i] != caddr2[i]) {
971 return 0; /* false */
972 }
973 }
974 return 1;
975 }
976
977 int getScopeID (struct sockaddr *him) {
978 struct SOCKADDR_IN6 *him6 = (struct SOCKADDR_IN6 *)him;
979 return him6->sin6_scope_id;
980 }
981
982 int cmpScopeID (unsigned int scope, struct sockaddr *him) {
983 struct SOCKADDR_IN6 *him6 = (struct SOCKADDR_IN6 *)him;
984 return him6->sin6_scope_id == scope;
985 }
986
987 /**
988 * Wrapper for select/poll with timeout on a single file descriptor.
989 *
990 * flags (defined in net_util_md.h can be any combination of
991 * NET_WAIT_READ, NET_WAIT_WRITE & NET_WAIT_CONNECT.
992 *
993 * The function will return when either the socket is ready for one
994 * of the specified operation or the timeout expired.
995 *
996 * It returns the time left from the timeout, or -1 if it expired.
997 */
998
999 jint
1000 NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout)
1001 {
1002 jlong prevTime = JVM_CurrentTimeMillis(env, 0);
1003 jint read_rv;
1004
1005 while (1) {
1006 jlong newTime;
1007 fd_set rd, wr, ex;
1008 struct timeval t;
1009
1010 t.tv_sec = timeout / 1000;
1011 t.tv_usec = (timeout % 1000) * 1000;
1012
1013 FD_ZERO(&rd);
1014 FD_ZERO(&wr);
1015 FD_ZERO(&ex);
1016 if (flags & NET_WAIT_READ) {
1017 FD_SET(fd, &rd);
1018 }
1019 if (flags & NET_WAIT_WRITE) {
1020 FD_SET(fd, &wr);
1021 }
1022 if (flags & NET_WAIT_CONNECT) {
1023 FD_SET(fd, &wr);
1024 FD_SET(fd, &ex);
1025 }
1026
1027 errno = 0;
1028 read_rv = select(fd+1, &rd, &wr, &ex, &t);
1029
1030 newTime = JVM_CurrentTimeMillis(env, 0);
1031 timeout -= (jint)(newTime - prevTime);
1032 if (timeout <= 0) {
1033 return read_rv > 0 ? 0 : -1;
1034 }
1035 newTime = prevTime;
1036
1037 if (read_rv > 0) {
1038 break;
1039 }
1040
1041
1042 } /* while */
1043
1044 return timeout;
1045 }
1046
1047 int NET_Socket (int domain, int type, int protocol) {
1048 SOCKET sock;
1049 sock = socket (domain, type, protocol);
1050 if (sock != INVALID_SOCKET) {
1051 SetHandleInformation((HANDLE)(uintptr_t)sock, HANDLE_FLAG_INHERIT, FALSE);
1052 }
1053 return (int)sock;
1054 }