1 /*
2 * Copyright (c) 2000, 2019, 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 <arpa/inet.h>
26 #include <errno.h>
27 #include <net/if.h>
28 #include <net/if_arp.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <sys/ioctl.h>
32
33 #if defined(_AIX)
34 #include <netinet/in6_var.h>
35 #include <sys/ndd_var.h>
36 #include <sys/kinfo.h>
37 #endif
38
39 #if defined(__solaris__)
40 #include <stropts.h>
41 #include <sys/dlpi.h>
42 #include <sys/sockio.h>
43 #endif
44
45 #if defined(_ALLBSD_SOURCE)
46 #include <net/ethernet.h>
47 #include <net/if_dl.h>
48 #include <ifaddrs.h>
49 #endif
50
51 #include "net_util.h"
52
53 #include "java_net_InetAddress.h"
54
55 #if defined(__linux__)
56 #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
57 #elif defined(__solaris__)
58 #ifndef SIOCGLIFHWADDR
59 #define SIOCGLIFHWADDR _IOWR('i', 192, struct lifreq)
60 #endif
61 #define DEV_PREFIX "/dev/"
62 #endif
63
64 #ifdef LIFNAMSIZ
65 #define IFNAMESIZE LIFNAMSIZ
66 #else
67 #define IFNAMESIZE IFNAMSIZ
68 #endif
69
70 #define CHECKED_MALLOC3(_pointer, _type, _size) \
71 do { \
72 _pointer = (_type)malloc(_size); \
73 if (_pointer == NULL) { \
74 JNU_ThrowOutOfMemoryError(env, "Native heap allocation failed"); \
75 return ifs; /* return untouched list */ \
76 } \
77 } while(0)
78
79 typedef struct _netaddr {
80 struct sockaddr *addr;
81 struct sockaddr *brdcast;
82 short mask;
83 int family; /* to make searches simple */
84 struct _netaddr *next;
85 } netaddr;
86
87 typedef struct _netif {
88 char *name;
89 int index;
90 char virtual;
91 netaddr *addr;
92 struct _netif *childs;
93 struct _netif *next;
94 } netif;
95
96 /************************************************************************
97 * NetworkInterface
98 */
99
100 #include "java_net_NetworkInterface.h"
101
102 /************************************************************************
103 * NetworkInterface
104 */
105 jclass ni_class;
106 jfieldID ni_nameID;
107 jfieldID ni_indexID;
108 jfieldID ni_descID;
109 jfieldID ni_addrsID;
110 jfieldID ni_bindsID;
111 jfieldID ni_virutalID;
112 jfieldID ni_childsID;
113 jfieldID ni_parentID;
114 jfieldID ni_defaultIndexID;
115 jmethodID ni_ctrID;
116
117 static jclass ni_ibcls;
118 static jmethodID ni_ibctrID;
119 static jfieldID ni_ibaddressID;
120 static jfieldID ni_ib4broadcastID;
121 static jfieldID ni_ib4maskID;
122
123 /** Private methods declarations **/
124 static jobject createNetworkInterface(JNIEnv *env, netif *ifs);
125 static int getFlags0(JNIEnv *env, jstring ifname);
126
127 static netif *enumInterfaces(JNIEnv *env);
128 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs);
129 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs);
130
131 static netif *addif(JNIEnv *env, int sock, const char *if_name, netif *ifs,
132 struct sockaddr *ifr_addrP,
133 struct sockaddr *ifr_broadaddrP,
134 int family, short prefix);
135 static void freeif(netif *ifs);
136
137 static int openSocket(JNIEnv *env, int proto);
138 static int openSocketWithFallback(JNIEnv *env, const char *ifname);
139
140 static short translateIPv4AddressToPrefix(struct sockaddr_in *addr);
141 static short translateIPv6AddressToPrefix(struct sockaddr_in6 *addr);
142
143 static int getIndex(int sock, const char *ifname);
144 static int getFlags(int sock, const char *ifname, int *flags);
145 static int getMacAddress(JNIEnv *env, const char *ifname,
146 const struct in_addr *addr, unsigned char *buf);
147 static int getMTU(JNIEnv *env, int sock, const char *ifname);
148
149 #if defined(__solaris__)
150 static int getMacFromDevice(JNIEnv *env, const char *ifname,
151 unsigned char *retbuf);
152 #endif
153
154 /******************* Java entry points *****************************/
155
156 /*
157 * Class: java_net_NetworkInterface
158 * Method: init
159 * Signature: ()V
160 */
161 JNIEXPORT void JNICALL Java_java_net_NetworkInterface_init
162 (JNIEnv *env, jclass cls)
163 {
164 ni_class = (*env)->FindClass(env, "java/net/NetworkInterface");
165 CHECK_NULL(ni_class);
166 ni_class = (*env)->NewGlobalRef(env, ni_class);
167 CHECK_NULL(ni_class);
168 ni_nameID = (*env)->GetFieldID(env, ni_class, "name", "Ljava/lang/String;");
169 CHECK_NULL(ni_nameID);
170 ni_indexID = (*env)->GetFieldID(env, ni_class, "index", "I");
171 CHECK_NULL(ni_indexID);
172 ni_addrsID = (*env)->GetFieldID(env, ni_class, "addrs",
173 "[Ljava/net/InetAddress;");
174 CHECK_NULL(ni_addrsID);
175 ni_bindsID = (*env)->GetFieldID(env, ni_class, "bindings",
176 "[Ljava/net/InterfaceAddress;");
177 CHECK_NULL(ni_bindsID);
178 ni_descID = (*env)->GetFieldID(env, ni_class, "displayName",
179 "Ljava/lang/String;");
180 CHECK_NULL(ni_descID);
181 ni_virutalID = (*env)->GetFieldID(env, ni_class, "virtual", "Z");
182 CHECK_NULL(ni_virutalID);
183 ni_childsID = (*env)->GetFieldID(env, ni_class, "childs",
184 "[Ljava/net/NetworkInterface;");
185 CHECK_NULL(ni_childsID);
186 ni_parentID = (*env)->GetFieldID(env, ni_class, "parent",
187 "Ljava/net/NetworkInterface;");
188 CHECK_NULL(ni_parentID);
189 ni_ctrID = (*env)->GetMethodID(env, ni_class, "<init>", "()V");
190 CHECK_NULL(ni_ctrID);
191 ni_ibcls = (*env)->FindClass(env, "java/net/InterfaceAddress");
192 CHECK_NULL(ni_ibcls);
193 ni_ibcls = (*env)->NewGlobalRef(env, ni_ibcls);
194 CHECK_NULL(ni_ibcls);
195 ni_ibctrID = (*env)->GetMethodID(env, ni_ibcls, "<init>", "()V");
196 CHECK_NULL(ni_ibctrID);
197 ni_ibaddressID = (*env)->GetFieldID(env, ni_ibcls, "address",
198 "Ljava/net/InetAddress;");
199 CHECK_NULL(ni_ibaddressID);
200 ni_ib4broadcastID = (*env)->GetFieldID(env, ni_ibcls, "broadcast",
201 "Ljava/net/Inet4Address;");
202 CHECK_NULL(ni_ib4broadcastID);
203 ni_ib4maskID = (*env)->GetFieldID(env, ni_ibcls, "maskLength", "S");
204 CHECK_NULL(ni_ib4maskID);
205 ni_defaultIndexID = (*env)->GetStaticFieldID(env, ni_class, "defaultIndex",
206 "I");
207 CHECK_NULL(ni_defaultIndexID);
208 initInetAddressIDs(env);
209 }
210
211 /*
212 * Class: java_net_NetworkInterface
213 * Method: getByName0
214 * Signature: (Ljava/lang/String;)Ljava/net/NetworkInterface;
215 */
216 JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByName0
217 (JNIEnv *env, jclass cls, jstring name)
218 {
219 netif *ifs, *curr;
220 jboolean isCopy;
221 const char* name_utf;
222 char *colonP;
223 char searchName[IFNAMESIZE];
224 jobject obj = NULL;
225
226 if (name != NULL) {
227 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
228 } else {
229 JNU_ThrowNullPointerException(env, "network interface name is NULL");
230 return NULL;
231 }
232
233 if (name_utf == NULL) {
234 if (!(*env)->ExceptionCheck(env))
235 JNU_ThrowOutOfMemoryError(env, NULL);
236 return NULL;
237 }
238
239 ifs = enumInterfaces(env);
240 if (ifs == NULL) {
241 return NULL;
242 }
243
244 // search the list of interfaces based on name,
245 // if it is virtual sub interface search with parent first.
246 strncpy(searchName, name_utf, IFNAMESIZE);
247 searchName[IFNAMESIZE - 1] = '\0';
248 colonP = strchr(searchName, ':');
249 if (colonP != NULL) {
250 *colonP = '\0';
251 }
252 curr = ifs;
253 while (curr != NULL) {
254 if (strcmp(searchName, curr->name) == 0) {
255 break;
256 }
257 curr = curr->next;
258 }
259
260 // search the child list
261 if (colonP != NULL && curr != NULL) {
262 curr = curr->childs;
263 while (curr != NULL) {
264 if (strcmp(name_utf, curr->name) == 0) {
265 break;
266 }
267 curr = curr->next;
268 }
269 }
270
271 // if found create a NetworkInterface
272 if (curr != NULL) {
273 obj = createNetworkInterface(env, curr);
274 }
275
276 // release the UTF string and interface list
277 (*env)->ReleaseStringUTFChars(env, name, name_utf);
278 freeif(ifs);
279
280 return obj;
281 }
282
283 /*
284 * Class: java_net_NetworkInterface
285 * Method: getByIndex0
286 * Signature: (Ljava/lang/String;)Ljava/net/NetworkInterface;
287 */
288 JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByIndex0
289 (JNIEnv *env, jclass cls, jint index)
290 {
291 netif *ifs, *curr;
292 jobject obj = NULL;
293
294 if (index <= 0) {
295 return NULL;
296 }
297
298 ifs = enumInterfaces(env);
299 if (ifs == NULL) {
300 return NULL;
301 }
302
303 // search the list of interfaces based on index
304 curr = ifs;
305 while (curr != NULL) {
306 if (index == curr->index) {
307 break;
308 }
309 curr = curr->next;
310 }
311
312 // if found create a NetworkInterface
313 if (curr != NULL) {
314 obj = createNetworkInterface(env, curr);
315 }
316
317 // release the interface list
318 freeif(ifs);
319
320 return obj;
321 }
322
323 // Return the interface in ifs that iaObj is bound to, if any - otherwise NULL
324 static netif* find_bound_interface(JNIEnv *env, netif* ifs, jobject iaObj, int family) {
325 netif* curr = ifs;
326 while (curr != NULL) {
327 netaddr *addrP = curr->addr;
328
329 // iterate through each address on the interface
330 while (addrP != NULL) {
331
332 if (family == addrP->family) {
333 if (family == AF_INET) {
334 int address1 = htonl(
335 ((struct sockaddr_in *)addrP->addr)->sin_addr.s_addr);
336 int address2 = getInetAddress_addr(env, iaObj);
337 if ((*env)->ExceptionCheck(env)) {
338 return NULL;
339 }
340 if (address1 == address2) {
341 return curr;
342 }
343 } else if (family == AF_INET6) {
344 jbyte *bytes = (jbyte *)&(
345 ((struct sockaddr_in6*)addrP->addr)->sin6_addr);
346 jbyte caddr[16];
347 int i;
348 unsigned int scopeid;
349 getInet6Address_ipaddress(env, iaObj, (char *)caddr);
350 scopeid = (unsigned int)getInet6Address_scopeid(env, iaObj);
351 if (scopeid != 0 && scopeid != ((struct sockaddr_in6*)addrP->addr)->sin6_scope_id)
352 break;
353 i = 0;
354 while (i < 16) {
355 if (caddr[i] != bytes[i]) {
356 break;
357 }
358 i++;
359 }
360 if (i >= 16) {
361 return curr;
362 }
363 }
364 }
365
366 addrP = addrP->next;
367 }
368 curr = curr->next;
369 }
370
371 return NULL;
372 }
373
374 /*
375 * Class: java_net_NetworkInterface
376 * Method: boundInetAddress0
377 * Signature: (Ljava/net/InetAddress;)boundInetAddress;
378 */
379 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_boundInetAddress0
380 (JNIEnv *env, jclass cls, jobject iaObj)
381 {
382 netif *ifs = NULL;
383 jboolean bound = JNI_FALSE;
384 int sock;
385
386 int family = getInetAddress_family(env, iaObj);
387 JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);
388
389 if (family == java_net_InetAddress_IPv4) {
390 family = AF_INET;
391 } else if (family == java_net_InetAddress_IPv6) {
392 family = AF_INET6;
393 } else {
394 return JNI_FALSE; // Invalid family
395 }
396
397 if (family == AF_INET) {
398 sock = openSocket(env, AF_INET);
399 if (sock < 0 && (*env)->ExceptionOccurred(env)) {
400 return JNI_FALSE;
401 }
402
403 // enumerate IPv4 addresses
404 if (sock >= 0) {
405 ifs = enumIPv4Interfaces(env, sock, ifs);
406 close(sock);
407
408 if ((*env)->ExceptionOccurred(env)) {
409 goto cleanup;
410 }
411 }
412 if (find_bound_interface(env, ifs, iaObj, family) != NULL)
413 bound = JNI_TRUE;
414 } else if (ipv6_available()) {
415 // If IPv6 is available then enumerate IPv6 addresses.
416 // User can disable ipv6 explicitly by -Djava.net.preferIPv4Stack=true,
417 // so we have to call ipv6_available()
418 sock = openSocket(env, AF_INET6);
419 if (sock < 0) {
420 return JNI_FALSE;
421 }
422
423 ifs = enumIPv6Interfaces(env, sock, ifs);
424 close(sock);
425
426 if ((*env)->ExceptionOccurred(env)) {
427 goto cleanup;
428 }
429
430 if (find_bound_interface(env, ifs, iaObj, family) != NULL)
431 bound = JNI_TRUE;
432 }
433
434 cleanup:
435 freeif(ifs);
436
437 return bound;
438 }
439
440 /*
441 * Class: java_net_NetworkInterface
442 * Method: getByInetAddress0
443 * Signature: (Ljava/net/InetAddress;)Ljava/net/NetworkInterface;
444 */
445 JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByInetAddress0
446 (JNIEnv *env, jclass cls, jobject iaObj)
447 {
448 netif *ifs, *curr;
449 jobject obj = NULL;
450 int family = getInetAddress_family(env, iaObj);
451 JNU_CHECK_EXCEPTION_RETURN(env, NULL);
452
453 if (family == java_net_InetAddress_IPv4) {
454 family = AF_INET;
455 } else if (family == java_net_InetAddress_IPv6) {
456 family = AF_INET6;
457 } else {
458 return NULL; // Invalid family
459 }
460 ifs = enumInterfaces(env);
461 if (ifs == NULL) {
462 return NULL;
463 }
464
465 curr = find_bound_interface(env, ifs, iaObj, family);
466
467 // if found create a NetworkInterface
468 if (curr != NULL) {
469 obj = createNetworkInterface(env, curr);
470 }
471
472 // release the interface list
473 freeif(ifs);
474
475 return obj;
476 }
477
478 /*
479 * Class: java_net_NetworkInterface
480 * Method: getAll
481 * Signature: ()[Ljava/net/NetworkInterface;
482 */
483 JNIEXPORT jobjectArray JNICALL Java_java_net_NetworkInterface_getAll
484 (JNIEnv *env, jclass cls)
485 {
486 netif *ifs, *curr;
487 jobjectArray netIFArr;
488 jint arr_index, ifCount;
489
490 ifs = enumInterfaces(env);
491 if (ifs == NULL) {
492 return NULL;
493 }
494
495 // count the interfaces
496 ifCount = 0;
497 curr = ifs;
498 while (curr != NULL) {
499 ifCount++;
500 curr = curr->next;
501 }
502
503 // allocate a NetworkInterface array
504 netIFArr = (*env)->NewObjectArray(env, ifCount, cls, NULL);
505 if (netIFArr == NULL) {
506 freeif(ifs);
507 return NULL;
508 }
509
510 // iterate through the interfaces, create a NetworkInterface instance
511 // for each array element and populate the object
512 curr = ifs;
513 arr_index = 0;
514 while (curr != NULL) {
515 jobject netifObj;
516
517 netifObj = createNetworkInterface(env, curr);
518 if (netifObj == NULL) {
519 freeif(ifs);
520 return NULL;
521 }
522
523 // put the NetworkInterface into the array
524 (*env)->SetObjectArrayElement(env, netIFArr, arr_index++, netifObj);
525
526 curr = curr->next;
527 }
528
529 // release the interface list
530 freeif(ifs);
531
532 return netIFArr;
533 }
534
535 /*
536 * Class: java_net_NetworkInterface
537 * Method: isUp0
538 * Signature: (Ljava/lang/String;I)Z
539 */
540 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isUp0
541 (JNIEnv *env, jclass cls, jstring name, jint index)
542 {
543 int ret = getFlags0(env, name);
544 return ((ret & IFF_UP) && (ret & IFF_RUNNING)) ? JNI_TRUE : JNI_FALSE;
545 }
546
547 /*
548 * Class: java_net_NetworkInterface
549 * Method: isP2P0
550 * Signature: (Ljava/lang/String;I)Z
551 */
552 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isP2P0
553 (JNIEnv *env, jclass cls, jstring name, jint index)
554 {
555 int ret = getFlags0(env, name);
556 return (ret & IFF_POINTOPOINT) ? JNI_TRUE : JNI_FALSE;
557 }
558
559 /*
560 * Class: java_net_NetworkInterface
561 * Method: isLoopback0
562 * Signature: (Ljava/lang/String;I)Z
563 */
564 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isLoopback0
565 (JNIEnv *env, jclass cls, jstring name, jint index)
566 {
567 int ret = getFlags0(env, name);
568 return (ret & IFF_LOOPBACK) ? JNI_TRUE : JNI_FALSE;
569 }
570
571 /*
572 * Class: java_net_NetworkInterface
573 * Method: supportsMulticast0
574 * Signature: (Ljava/lang/String;I)Z
575 */
576 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_supportsMulticast0
577 (JNIEnv *env, jclass cls, jstring name, jint index)
578 {
579 int ret = getFlags0(env, name);
580 return (ret & IFF_MULTICAST) ? JNI_TRUE : JNI_FALSE;
581 }
582
583 /*
584 * Class: java_net_NetworkInterface
585 * Method: getMacAddr0
586 * Signature: ([bLjava/lang/String;I)[b
587 */
588 JNIEXPORT jbyteArray JNICALL Java_java_net_NetworkInterface_getMacAddr0
589 (JNIEnv *env, jclass cls, jbyteArray addrArray, jstring name, jint index)
590 {
591 jint addr;
592 jbyte caddr[4];
593 struct in_addr iaddr;
594 jbyteArray ret = NULL;
595 unsigned char mac[16];
596 int len;
597 jboolean isCopy;
598 const char *name_utf;
599
600 if (name != NULL) {
601 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
602 } else {
603 JNU_ThrowNullPointerException(env, "network interface name is NULL");
604 return NULL;
605 }
606
607 if (name_utf == NULL) {
608 if (!(*env)->ExceptionCheck(env))
609 JNU_ThrowOutOfMemoryError(env, NULL);
610 return NULL;
611 }
612
613 if (!IS_NULL(addrArray)) {
614 (*env)->GetByteArrayRegion(env, addrArray, 0, 4, caddr);
615 addr = ((caddr[0]<<24) & 0xff000000);
616 addr |= ((caddr[1] <<16) & 0xff0000);
617 addr |= ((caddr[2] <<8) & 0xff00);
618 addr |= (caddr[3] & 0xff);
619 iaddr.s_addr = htonl(addr);
620 len = getMacAddress(env, name_utf, &iaddr, mac);
621 } else {
622 len = getMacAddress(env, name_utf, NULL, mac);
623 }
624
625 if (len > 0) {
626 ret = (*env)->NewByteArray(env, len);
627 if (!IS_NULL(ret)) {
628 (*env)->SetByteArrayRegion(env, ret, 0, len, (jbyte *)(mac));
629 }
630 }
631
632 // release the UTF string and interface list
633 (*env)->ReleaseStringUTFChars(env, name, name_utf);
634
635 return ret;
636 }
637
638 /*
639 * Class: java_net_NetworkInterface
640 * Method: getMTU0
641 * Signature: ([bLjava/lang/String;I)I
642 */
643 JNIEXPORT jint JNICALL Java_java_net_NetworkInterface_getMTU0
644 (JNIEnv *env, jclass cls, jstring name, jint index)
645 {
646 jboolean isCopy;
647 int sock, ret = -1;
648 const char* name_utf = NULL;
649
650 if (name != NULL) {
651 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
652 } else {
653 JNU_ThrowNullPointerException(env, "network interface name is NULL");
654 return ret;
655 }
656
657 if (name_utf == NULL) {
658 if (!(*env)->ExceptionCheck(env))
659 JNU_ThrowOutOfMemoryError(env, NULL);
660 return ret;
661 }
662
663 if ((sock = openSocketWithFallback(env, name_utf)) < 0) {
664 (*env)->ReleaseStringUTFChars(env, name, name_utf);
665 return JNI_FALSE;
666 }
667
668 ret = getMTU(env, sock, name_utf);
669
670 (*env)->ReleaseStringUTFChars(env, name, name_utf);
671
672 close(sock);
673 return ret;
674 }
675
676 /*** Private methods definitions ****/
677
678 static int getFlags0(JNIEnv *env, jstring name) {
679 jboolean isCopy;
680 int ret, sock, flags = 0;
681 const char *name_utf;
682
683 if (name != NULL) {
684 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
685 } else {
686 JNU_ThrowNullPointerException(env, "network interface name is NULL");
687 return -1;
688 }
689
690 if (name_utf == NULL) {
691 if (!(*env)->ExceptionCheck(env))
692 JNU_ThrowOutOfMemoryError(env, NULL);
693 return -1;
694 }
695 if ((sock = openSocketWithFallback(env, name_utf)) < 0) {
696 (*env)->ReleaseStringUTFChars(env, name, name_utf);
697 return -1;
698 }
699
700 ret = getFlags(sock, name_utf, &flags);
701
702 close(sock);
703 (*env)->ReleaseStringUTFChars(env, name, name_utf);
704
705 if (ret < 0) {
706 JNU_ThrowByNameWithMessageAndLastError
707 (env, JNU_JAVANETPKG "SocketException", "getFlags() failed");
708 return -1;
709 }
710
711 return flags;
712 }
713
714 /*
715 * Creates a NetworkInterface object, populates the name, the index, and
716 * populates the InetAddress array based on the IP addresses for this
717 * interface.
718 */
719 static jobject createNetworkInterface(JNIEnv *env, netif *ifs) {
720 jobject netifObj;
721 jobject name;
722 jobjectArray addrArr;
723 jobjectArray bindArr;
724 jobjectArray childArr;
725 netaddr *addrs;
726 jint addr_index, addr_count, bind_index;
727 jint child_count, child_index;
728 netaddr *addrP;
729 netif *childP;
730 jobject tmp;
731
732 // create a NetworkInterface object and populate it
733 netifObj = (*env)->NewObject(env, ni_class, ni_ctrID);
734 CHECK_NULL_RETURN(netifObj, NULL);
735 name = (*env)->NewStringUTF(env, ifs->name);
736 CHECK_NULL_RETURN(name, NULL);
737 (*env)->SetObjectField(env, netifObj, ni_nameID, name);
738 (*env)->SetObjectField(env, netifObj, ni_descID, name);
739 (*env)->SetIntField(env, netifObj, ni_indexID, ifs->index);
740 (*env)->SetBooleanField(env, netifObj, ni_virutalID,
741 ifs->virtual ? JNI_TRUE : JNI_FALSE);
742
743 // count the number of addresses on this interface
744 addr_count = 0;
745 addrP = ifs->addr;
746 while (addrP != NULL) {
747 addr_count++;
748 addrP = addrP->next;
749 }
750
751 // create the array of InetAddresses
752 addrArr = (*env)->NewObjectArray(env, addr_count, ia_class, NULL);
753 if (addrArr == NULL) {
754 return NULL;
755 }
756
757 bindArr = (*env)->NewObjectArray(env, addr_count, ni_ibcls, NULL);
758 if (bindArr == NULL) {
759 return NULL;
760 }
761 addrP = ifs->addr;
762 addr_index = 0;
763 bind_index = 0;
764 while (addrP != NULL) {
765 jobject iaObj = NULL;
766 jobject ibObj = NULL;
767
768 if (addrP->family == AF_INET) {
769 iaObj = (*env)->NewObject(env, ia4_class, ia4_ctrID);
770 if (iaObj) {
771 setInetAddress_addr(env, iaObj, htonl(
772 ((struct sockaddr_in*)addrP->addr)->sin_addr.s_addr));
773 JNU_CHECK_EXCEPTION_RETURN(env, NULL);
774 } else {
775 return NULL;
776 }
777 ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID);
778 if (ibObj) {
779 (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj);
780 if (addrP->brdcast) {
781 jobject ia2Obj = NULL;
782 ia2Obj = (*env)->NewObject(env, ia4_class, ia4_ctrID);
783 if (ia2Obj) {
784 setInetAddress_addr(env, ia2Obj, htonl(
785 ((struct sockaddr_in*)addrP->brdcast)->sin_addr.s_addr));
786 JNU_CHECK_EXCEPTION_RETURN(env, NULL);
787 (*env)->SetObjectField(env, ibObj, ni_ib4broadcastID, ia2Obj);
788 } else {
789 return NULL;
790 }
791 }
792 (*env)->SetShortField(env, ibObj, ni_ib4maskID, addrP->mask);
793 (*env)->SetObjectArrayElement(env, bindArr, bind_index++, ibObj);
794 } else {
795 return NULL;
796 }
797 }
798 if (addrP->family == AF_INET6) {
799 int scope=0;
800 iaObj = (*env)->NewObject(env, ia6_class, ia6_ctrID);
801 if (iaObj) {
802 jboolean ret = setInet6Address_ipaddress(env, iaObj,
803 (char *)&(((struct sockaddr_in6*)addrP->addr)->sin6_addr));
804 if (ret == JNI_FALSE) {
805 return NULL;
806 }
807
808 scope = ((struct sockaddr_in6*)addrP->addr)->sin6_scope_id;
809
810 if (scope != 0) { /* zero is default value, no need to set */
811 setInet6Address_scopeid(env, iaObj, scope);
812 setInet6Address_scopeifname(env, iaObj, netifObj);
813 }
814 } else {
815 return NULL;
816 }
817 ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID);
818 if (ibObj) {
819 (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj);
820 (*env)->SetShortField(env, ibObj, ni_ib4maskID, addrP->mask);
821 (*env)->SetObjectArrayElement(env, bindArr, bind_index++, ibObj);
822 } else {
823 return NULL;
824 }
825 }
826
827 (*env)->SetObjectArrayElement(env, addrArr, addr_index++, iaObj);
828 addrP = addrP->next;
829 }
830
831 // see if there is any virtual interface attached to this one.
832 child_count = 0;
833 childP = ifs->childs;
834 while (childP) {
835 child_count++;
836 childP = childP->next;
837 }
838
839 childArr = (*env)->NewObjectArray(env, child_count, ni_class, NULL);
840 if (childArr == NULL) {
841 return NULL;
842 }
843
844 // create the NetworkInterface instances for the sub-interfaces as well
845 child_index = 0;
846 childP = ifs->childs;
847 while(childP) {
848 tmp = createNetworkInterface(env, childP);
849 if (tmp == NULL) {
850 return NULL;
851 }
852 (*env)->SetObjectField(env, tmp, ni_parentID, netifObj);
853 (*env)->SetObjectArrayElement(env, childArr, child_index++, tmp);
854 childP = childP->next;
855 }
856 (*env)->SetObjectField(env, netifObj, ni_addrsID, addrArr);
857 (*env)->SetObjectField(env, netifObj, ni_bindsID, bindArr);
858 (*env)->SetObjectField(env, netifObj, ni_childsID, childArr);
859
860 // return the NetworkInterface
861 return netifObj;
862 }
863
864 /*
865 * Enumerates all interfaces
866 */
867 static netif *enumInterfaces(JNIEnv *env) {
868 netif *ifs = NULL;
869 int sock;
870
871 sock = openSocket(env, AF_INET);
872 if (sock < 0 && (*env)->ExceptionOccurred(env)) {
873 return NULL;
874 }
875
876 // enumerate IPv4 addresses
877 if (sock >= 0) {
878 ifs = enumIPv4Interfaces(env, sock, ifs);
879 close(sock);
880
881 if ((*env)->ExceptionOccurred(env)) {
882 freeif(ifs);
883 return NULL;
884 }
885 }
886
887 // If IPv6 is available then enumerate IPv6 addresses.
888 // User can disable ipv6 explicitly by -Djava.net.preferIPv4Stack=true,
889 // so we have to call ipv6_available()
890 if (ipv6_available()) {
891 sock = openSocket(env, AF_INET6);
892 if (sock < 0) {
893 freeif(ifs);
894 return NULL;
895 }
896
897 ifs = enumIPv6Interfaces(env, sock, ifs);
898 close(sock);
899
900 if ((*env)->ExceptionOccurred(env)) {
901 freeif(ifs);
902 return NULL;
903 }
904 }
905
906 return ifs;
907 }
908
909 /*
910 * Frees an interface list (including any attached addresses).
911 */
912 static void freeif(netif *ifs) {
913 netif *currif = ifs;
914 netif *child = NULL;
915
916 while (currif != NULL) {
917 netaddr *addrP = currif->addr;
918 while (addrP != NULL) {
919 netaddr *next = addrP->next;
920 free(addrP);
921 addrP = next;
922 }
923
924 // don't forget to free the sub-interfaces
925 if (currif->childs != NULL) {
926 freeif(currif->childs);
927 }
928
929 ifs = currif->next;
930 free(currif);
931 currif = ifs;
932 }
933 }
934
935 static netif *addif(JNIEnv *env, int sock, const char *if_name, netif *ifs,
936 struct sockaddr *ifr_addrP,
937 struct sockaddr *ifr_broadaddrP,
938 int family, short prefix)
939 {
940 netif *currif = ifs, *parent;
941 netaddr *addrP;
942 char name[IFNAMESIZE], vname[IFNAMESIZE];
943 char *name_colonP;
944 int isVirtual = 0;
945 int addr_size;
946
947 // If the interface name is a logical interface then we remove the unit
948 // number so that we have the physical interface (eg: hme0:1 -> hme0).
949 // NetworkInterface currently doesn't have any concept of physical vs.
950 // logical interfaces.
951 strncpy(name, if_name, IFNAMESIZE);
952 name[IFNAMESIZE - 1] = '\0';
953 *vname = 0;
954
955 // Create and populate the netaddr node. If allocation fails
956 // return an un-updated list.
957
958 // Allocate for addr and brdcast at once
959
960 addr_size = (family == AF_INET) ? sizeof(struct sockaddr_in)
961 : sizeof(struct sockaddr_in6);
962
963 CHECKED_MALLOC3(addrP, netaddr *, sizeof(netaddr) + 2 * addr_size);
964 addrP->addr = (struct sockaddr *)((char *)addrP + sizeof(netaddr));
965 memcpy(addrP->addr, ifr_addrP, addr_size);
966
967 addrP->family = family;
968 addrP->mask = prefix;
969 addrP->next = 0;
970
971 // for IPv4 add broadcast address
972 if (family == AF_INET && ifr_broadaddrP != NULL) {
973 addrP->brdcast = (struct sockaddr *)
974 ((char *)addrP + sizeof(netaddr) + addr_size);
975 memcpy(addrP->brdcast, ifr_broadaddrP, addr_size);
976 } else {
977 addrP->brdcast = NULL;
978 }
979
980 // Deal with virtual interface with colon notation e.g. eth0:1
981 name_colonP = strchr(name, ':');
982 if (name_colonP != NULL) {
983 int flags = 0;
984 // This is a virtual interface. If we are able to access the parent
985 // we need to create a new entry if it doesn't exist yet *and* update
986 // the 'parent' interface with the new records.
987 *name_colonP = 0;
988 if (getFlags(sock, name, &flags) < 0 || flags < 0) {
989 // failed to access parent interface do not create parent.
990 // We are a virtual interface with no parent.
991 isVirtual = 1;
992 *name_colonP = ':';
993 } else {
994 // Got access to parent, so create it if necessary.
995 // Save original name to vname and truncate name by ':'
996 memcpy(vname, name, sizeof(vname));
997 vname[name_colonP - name] = ':';
998 }
999 }
1000
1001 // Check if this is a "new" interface. Use the interface name for
1002 // matching because index isn't supported on Solaris 2.6 & 7.
1003 while (currif != NULL) {
1004 if (strcmp(name, currif->name) == 0) {
1005 break;
1006 }
1007 currif = currif->next;
1008 }
1009
1010 // If "new" then create a netif structure and insert it into the list.
1011 if (currif == NULL) {
1012 CHECKED_MALLOC3(currif, netif *, sizeof(netif) + IFNAMESIZE);
1013 currif->name = (char *)currif + sizeof(netif);
1014 strncpy(currif->name, name, IFNAMESIZE);
1015 currif->name[IFNAMESIZE - 1] = '\0';
1016 currif->index = getIndex(sock, name);
1017 currif->addr = NULL;
1018 currif->childs = NULL;
1019 currif->virtual = isVirtual;
1020 currif->next = ifs;
1021 ifs = currif;
1022 }
1023
1024 // Finally insert the address on the interface
1025 addrP->next = currif->addr;
1026 currif->addr = addrP;
1027
1028 parent = currif;
1029
1030 // Deal with the virtual interface now.
1031 if (vname[0]) {
1032 netaddr *tmpaddr;
1033
1034 currif = parent->childs;
1035
1036 while (currif != NULL) {
1037 if (strcmp(vname, currif->name) == 0) {
1038 break;
1039 }
1040 currif = currif->next;
1041 }
1042
1043 if (currif == NULL) {
1044 CHECKED_MALLOC3(currif, netif *, sizeof(netif) + IFNAMESIZE);
1045 currif->name = (char *)currif + sizeof(netif);
1046 strncpy(currif->name, vname, IFNAMESIZE);
1047 currif->name[IFNAMESIZE - 1] = '\0';
1048 currif->index = getIndex(sock, vname);
1049 currif->addr = NULL; // Need to duplicate the addr entry?
1050 currif->virtual = 1;
1051 currif->childs = NULL;
1052 currif->next = parent->childs;
1053 parent->childs = currif;
1054 }
1055
1056 CHECKED_MALLOC3(tmpaddr, netaddr *, sizeof(netaddr) + 2 * addr_size);
1057 memcpy(tmpaddr, addrP, sizeof(netaddr));
1058 if (addrP->addr != NULL) {
1059 tmpaddr->addr = (struct sockaddr *)
1060 ((char*)tmpaddr + sizeof(netaddr));
1061 memcpy(tmpaddr->addr, addrP->addr, addr_size);
1062 }
1063
1064 if (addrP->brdcast != NULL) {
1065 tmpaddr->brdcast = (struct sockaddr *)
1066 ((char *)tmpaddr + sizeof(netaddr) + addr_size);
1067 memcpy(tmpaddr->brdcast, addrP->brdcast, addr_size);
1068 }
1069
1070 tmpaddr->next = currif->addr;
1071 currif->addr = tmpaddr;
1072 }
1073
1074 return ifs;
1075 }
1076
1077 /*
1078 * Determines the prefix value for an AF_INET subnet address.
1079 */
1080 static short translateIPv4AddressToPrefix(struct sockaddr_in *addr) {
1081 short prefix = 0;
1082 unsigned int mask;
1083 if (addr == NULL) {
1084 return 0;
1085 }
1086 mask = ntohl(addr->sin_addr.s_addr);
1087 while (mask) {
1088 mask <<= 1;
1089 prefix++;
1090 }
1091 return prefix;
1092 }
1093
1094 /*
1095 * Determines the prefix value for an AF_INET6 subnet address.
1096 */
1097 static short translateIPv6AddressToPrefix(struct sockaddr_in6 *addr) {
1098 short prefix = 0;
1099 u_char *addrBytes;
1100 if (addr == NULL) {
1101 return 0;
1102 }
1103 addrBytes = (u_char *)&(addr->sin6_addr);
1104 unsigned int byte, bit;
1105
1106 for (byte = 0; byte < sizeof(struct in6_addr); byte++, prefix += 8) {
1107 if (addrBytes[byte] != 0xff) {
1108 break;
1109 }
1110 }
1111 if (byte != sizeof(struct in6_addr)) {
1112 for (bit = 7; bit != 0; bit--, prefix++) {
1113 if (!(addrBytes[byte] & (1 << bit))) {
1114 break;
1115 }
1116 }
1117 for (; bit != 0; bit--) {
1118 if (addrBytes[byte] & (1 << bit)) {
1119 prefix = 0;
1120 break;
1121 }
1122 }
1123 if (prefix > 0) {
1124 byte++;
1125 for (; byte < sizeof(struct in6_addr); byte++) {
1126 if (addrBytes[byte]) {
1127 prefix = 0;
1128 }
1129 }
1130 }
1131 }
1132
1133 return prefix;
1134 }
1135
1136 /*
1137 * Opens a socket for further ioct calls. proto is one of AF_INET or AF_INET6.
1138 */
1139 static int openSocket(JNIEnv *env, int proto) {
1140 int sock;
1141
1142 if ((sock = socket(proto, SOCK_DGRAM, 0)) < 0) {
1143 // If we lack support for this address family or protocol,
1144 // don't throw an exception.
1145 if (errno != EPROTONOSUPPORT && errno != EAFNOSUPPORT) {
1146 JNU_ThrowByNameWithMessageAndLastError
1147 (env, JNU_JAVANETPKG "SocketException", "Socket creation failed");
1148 }
1149 return -1;
1150 }
1151
1152 return sock;
1153 }
1154
1155 /** Linux **/
1156 #if defined(__linux__)
1157
1158 /*
1159 * Opens a socket for further ioctl calls. Tries AF_INET socket first and
1160 * if it fails return AF_INET6 socket.
1161 */
1162 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
1163 int sock;
1164
1165 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1166 if (errno == EPROTONOSUPPORT || errno == EAFNOSUPPORT) {
1167 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1168 JNU_ThrowByNameWithMessageAndLastError
1169 (env, JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed");
1170 return -1;
1171 }
1172 } else { // errno is not NOSUPPORT
1173 JNU_ThrowByNameWithMessageAndLastError
1174 (env, JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed");
1175 return -1;
1176 }
1177 }
1178
1179 // Linux starting from 2.6.? kernel allows ioctl call with either IPv4 or
1180 // IPv6 socket regardless of type of address of an interface.
1181 return sock;
1182 }
1183
1184 /*
1185 * Enumerates and returns all IPv4 interfaces on Linux.
1186 */
1187 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) {
1188 struct ifconf ifc;
1189 struct ifreq *ifreqP;
1190 char *buf = NULL;
1191 unsigned i;
1192
1193 // do a dummy SIOCGIFCONF to determine the buffer size
1194 // SIOCGIFCOUNT doesn't work
1195 ifc.ifc_buf = NULL;
1196 if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
1197 JNU_ThrowByNameWithMessageAndLastError
1198 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGIFCONF) failed");
1199 return ifs;
1200 }
1201
1202 // call SIOCGIFCONF to enumerate the interfaces
1203 CHECKED_MALLOC3(buf, char *, ifc.ifc_len);
1204 ifc.ifc_buf = buf;
1205 if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
1206 JNU_ThrowByNameWithMessageAndLastError
1207 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGIFCONF) failed");
1208 free(buf);
1209 return ifs;
1210 }
1211
1212 // iterate through each interface
1213 ifreqP = ifc.ifc_req;
1214 for (i = 0; i < ifc.ifc_len / sizeof(struct ifreq); i++, ifreqP++) {
1215 struct sockaddr addr, broadaddr, *broadaddrP = NULL;
1216 short prefix = 0;
1217
1218 // ignore non IPv4 addresses
1219 if (ifreqP->ifr_addr.sa_family != AF_INET) {
1220 continue;
1221 }
1222
1223 // save socket address
1224 memcpy(&addr, &(ifreqP->ifr_addr), sizeof(struct sockaddr));
1225
1226 // determine broadcast address, if applicable
1227 if ((ioctl(sock, SIOCGIFFLAGS, ifreqP) == 0) &&
1228 ifreqP->ifr_flags & IFF_BROADCAST) {
1229
1230 // restore socket address to ifreqP
1231 memcpy(&(ifreqP->ifr_addr), &addr, sizeof(struct sockaddr));
1232
1233 if (ioctl(sock, SIOCGIFBRDADDR, ifreqP) == 0) {
1234 memcpy(&broadaddr, &(ifreqP->ifr_broadaddr),
1235 sizeof(struct sockaddr));
1236 broadaddrP = &broadaddr;
1237 }
1238 }
1239
1240 // restore socket address to ifreqP
1241 memcpy(&(ifreqP->ifr_addr), &addr, sizeof(struct sockaddr));
1242
1243 // determine netmask
1244 if (ioctl(sock, SIOCGIFNETMASK, ifreqP) == 0) {
1245 prefix = translateIPv4AddressToPrefix(
1246 (struct sockaddr_in *)&(ifreqP->ifr_netmask));
1247 }
1248
1249 // add interface to the list
1250 ifs = addif(env, sock, ifreqP->ifr_name, ifs,
1251 &addr, broadaddrP, AF_INET, prefix);
1252
1253 // in case of exception, free interface list and buffer and return NULL
1254 if ((*env)->ExceptionOccurred(env)) {
1255 free(buf);
1256 freeif(ifs);
1257 return NULL;
1258 }
1259 }
1260
1261 // free buffer
1262 free(buf);
1263 return ifs;
1264 }
1265
1266 /*
1267 * Enumerates and returns all IPv6 interfaces on Linux.
1268 */
1269 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1270 FILE *f;
1271 char devname[21], addr6p[8][5];
1272 int prefix, scope, dad_status, if_idx;
1273
1274 if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) {
1275 while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
1276 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
1277 addr6p[4], addr6p[5], addr6p[6], addr6p[7],
1278 &if_idx, &prefix, &scope, &dad_status, devname) != EOF) {
1279
1280 char addr6[40];
1281 struct sockaddr_in6 addr;
1282
1283 sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
1284 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
1285 addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
1286
1287 memset(&addr, 0, sizeof(struct sockaddr_in6));
1288 inet_pton(AF_INET6, addr6, (void*)addr.sin6_addr.s6_addr);
1289
1290 // set scope ID to interface index
1291 addr.sin6_scope_id = if_idx;
1292
1293 // add interface to the list
1294 ifs = addif(env, sock, devname, ifs, (struct sockaddr *)&addr,
1295 NULL, AF_INET6, (short)prefix);
1296
1297 // if an exception occurred then return the list as is
1298 if ((*env)->ExceptionOccurred(env)) {
1299 break;
1300 }
1301 }
1302 fclose(f);
1303 }
1304 return ifs;
1305 }
1306
1307 /*
1308 * Try to get the interface index.
1309 */
1310 static int getIndex(int sock, const char *name) {
1311 struct ifreq if2;
1312 memset((char *)&if2, 0, sizeof(if2));
1313 strncpy(if2.ifr_name, name, sizeof(if2.ifr_name) - 1);
1314
1315 if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) {
1316 return -1;
1317 }
1318
1319 return if2.ifr_ifindex;
1320 }
1321
1322 /*
1323 * Gets the Hardware address (usually MAC address) for the named interface.
1324 * On return puts the data in buf, and returns the length, in byte, of the
1325 * MAC address. Returns -1 if there is no hardware address on that interface.
1326 */
1327 static int getMacAddress
1328 (JNIEnv *env, const char *ifname, const struct in_addr *addr,
1329 unsigned char *buf)
1330 {
1331 struct ifreq ifr;
1332 int i, sock;
1333
1334 if ((sock = openSocketWithFallback(env, ifname)) < 0) {
1335 return -1;
1336 }
1337
1338 memset((char *)&ifr, 0, sizeof(ifr));
1339 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1340 if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0) {
1341 JNU_ThrowByNameWithMessageAndLastError
1342 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGIFHWADDR) failed");
1343 close(sock);
1344 return -1;
1345 }
1346
1347 close(sock);
1348 memcpy(buf, &ifr.ifr_hwaddr.sa_data, IFHWADDRLEN);
1349
1350 // all bytes to 0 means no hardware address
1351 for (i = 0; i < IFHWADDRLEN; i++) {
1352 if (buf[i] != 0)
1353 return IFHWADDRLEN;
1354 }
1355
1356 return -1;
1357 }
1358
1359 static int getMTU(JNIEnv *env, int sock, const char *ifname) {
1360 struct ifreq if2;
1361 memset((char *)&if2, 0, sizeof(if2));
1362 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
1363
1364 if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) {
1365 JNU_ThrowByNameWithMessageAndLastError
1366 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGIFMTU) failed");
1367 return -1;
1368 }
1369
1370 return if2.ifr_mtu;
1371 }
1372
1373 static int getFlags(int sock, const char *ifname, int *flags) {
1374 struct ifreq if2;
1375 memset((char *)&if2, 0, sizeof(if2));
1376 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
1377
1378 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0) {
1379 return -1;
1380 }
1381
1382 if (sizeof(if2.ifr_flags) == sizeof(short)) {
1383 *flags = (if2.ifr_flags & 0xffff);
1384 } else {
1385 *flags = if2.ifr_flags;
1386 }
1387 return 0;
1388 }
1389
1390 #endif /* __linux__ */
1391
1392 /** AIX **/
1393 #if defined(_AIX)
1394
1395 /*
1396 * Opens a socket for further ioctl calls. Tries AF_INET socket first and
1397 * if it fails return AF_INET6 socket.
1398 */
1399 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
1400 int sock;
1401
1402 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1403 if (errno == EPROTONOSUPPORT || errno == EAFNOSUPPORT) {
1404 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1405 JNU_ThrowByNameWithMessageAndLastError
1406 (env, JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed");
1407 return -1;
1408 }
1409 } else { // errno is not NOSUPPORT
1410 JNU_ThrowByNameWithMessageAndLastError
1411 (env, JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed");
1412 return -1;
1413 }
1414 }
1415
1416 return sock;
1417 }
1418
1419 /*
1420 * Enumerates and returns all IPv4 interfaces on AIX.
1421 */
1422 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) {
1423 struct ifconf ifc;
1424 struct ifreq *ifreqP;
1425 char *buf = NULL;
1426 unsigned i;
1427
1428 // call SIOCGSIZIFCONF to get the size of SIOCGIFCONF buffer
1429 if (ioctl(sock, SIOCGSIZIFCONF, &(ifc.ifc_len)) < 0) {
1430 JNU_ThrowByNameWithMessageAndLastError
1431 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGSIZIFCONF) failed");
1432 return ifs;
1433 }
1434
1435 // call CSIOCGIFCONF instead of SIOCGIFCONF where interface
1436 // records will always have sizeof(struct ifreq) length.
1437 // Be aware that only IPv4 data is complete this way.
1438 CHECKED_MALLOC3(buf, char *, ifc.ifc_len);
1439 ifc.ifc_buf = buf;
1440 if (ioctl(sock, CSIOCGIFCONF, (char *)&ifc) < 0) {
1441 JNU_ThrowByNameWithMessageAndLastError
1442 (env, JNU_JAVANETPKG "SocketException", "ioctl(CSIOCGIFCONF) failed");
1443 free(buf);
1444 return ifs;
1445 }
1446
1447 // iterate through each interface
1448 ifreqP = ifc.ifc_req;
1449 for (i = 0; i < ifc.ifc_len / sizeof(struct ifreq); i++, ifreqP++) {
1450 struct sockaddr addr, broadaddr, *broadaddrP = NULL;
1451 short prefix = 0;
1452
1453 // ignore non IPv4 addresses
1454 if (ifreqP->ifr_addr.sa_family != AF_INET) {
1455 continue;
1456 }
1457
1458 // save socket address
1459 memcpy(&addr, &(ifreqP->ifr_addr), sizeof(struct sockaddr));
1460
1461 // determine broadcast address, if applicable
1462 if ((ioctl(sock, SIOCGIFFLAGS, ifreqP) == 0) &&
1463 ifreqP->ifr_flags & IFF_BROADCAST) {
1464
1465 // restore socket address to ifreqP
1466 memcpy(&(ifreqP->ifr_addr), &addr, sizeof(struct sockaddr));
1467
1468 if (ioctl(sock, SIOCGIFBRDADDR, ifreqP) == 0) {
1469 memcpy(&broadaddr, &(ifreqP->ifr_broadaddr),
1470 sizeof(struct sockaddr));
1471 broadaddrP = &broadaddr;
1472 }
1473 }
1474
1475 // restore socket address to ifreqP
1476 memcpy(&(ifreqP->ifr_addr), &addr, sizeof(struct sockaddr));
1477
1478 // determine netmask
1479 if (ioctl(sock, SIOCGIFNETMASK, ifreqP) == 0) {
1480 prefix = translateIPv4AddressToPrefix(
1481 (struct sockaddr_in *)&(ifreqP->ifr_addr));
1482 }
1483
1484 // add interface to the list
1485 ifs = addif(env, sock, ifreqP->ifr_name, ifs,
1486 &addr, broadaddrP, AF_INET, prefix);
1487
1488 // in case of exception, free interface list and buffer and return NULL
1489 if ((*env)->ExceptionOccurred(env)) {
1490 free(buf);
1491 freeif(ifs);
1492 return NULL;
1493 }
1494 }
1495
1496 // free buffer
1497 free(buf);
1498 return ifs;
1499 }
1500
1501 /*
1502 * Enumerates and returns all IPv6 interfaces on AIX.
1503 */
1504 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1505 struct ifconf ifc;
1506 struct ifreq *ifreqP;
1507 char *buf, *cp, *cplimit;
1508
1509 // call SIOCGSIZIFCONF to get size for SIOCGIFCONF buffer
1510 if (ioctl(sock, SIOCGSIZIFCONF, &(ifc.ifc_len)) < 0) {
1511 JNU_ThrowByNameWithMessageAndLastError
1512 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGSIZIFCONF) failed");
1513 return ifs;
1514 }
1515
1516 // call SIOCGIFCONF to enumerate the interfaces
1517 CHECKED_MALLOC3(buf, char *, ifc.ifc_len);
1518 ifc.ifc_buf = buf;
1519 if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
1520 JNU_ThrowByNameWithMessageAndLastError
1521 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGIFCONF) failed");
1522 free(buf);
1523 return ifs;
1524 }
1525
1526 // iterate through each interface
1527 ifreqP = ifc.ifc_req;
1528 cp = (char *)ifc.ifc_req;
1529 cplimit = cp + ifc.ifc_len;
1530
1531 for (; cp < cplimit;
1532 cp += (sizeof(ifreqP->ifr_name) +
1533 MAX((ifreqP->ifr_addr).sa_len, sizeof(ifreqP->ifr_addr))))
1534 {
1535 ifreqP = (struct ifreq *)cp;
1536 short prefix = 0;
1537
1538 // ignore non IPv6 addresses
1539 if (ifreqP->ifr_addr.sa_family != AF_INET6) {
1540 continue;
1541 }
1542
1543 // determine netmask
1544 struct in6_ifreq if6;
1545 memset((char *)&if6, 0, sizeof(if6));
1546 strncpy(if6.ifr_name, ifreqP->ifr_name, sizeof(if6.ifr_name) - 1);
1547 memcpy(&(if6.ifr_Addr), &(ifreqP->ifr_addr),
1548 sizeof(struct sockaddr_in6));
1549 if (ioctl(sock, SIOCGIFNETMASK6, (char *)&if6) >= 0) {
1550 prefix = translateIPv6AddressToPrefix(&(if6.ifr_Addr));
1551 }
1552
1553 // set scope ID to interface index
1554 ((struct sockaddr_in6 *)&(ifreqP->ifr_addr))->sin6_scope_id =
1555 getIndex(sock, ifreqP->ifr_name);
1556
1557 // add interface to the list
1558 ifs = addif(env, sock, ifreqP->ifr_name, ifs,
1559 (struct sockaddr *)&(ifreqP->ifr_addr),
1560 NULL, AF_INET6, prefix);
1561
1562 // if an exception occurred then free the list
1563 if ((*env)->ExceptionOccurred(env)) {
1564 free(buf);
1565 freeif(ifs);
1566 return NULL;
1567 }
1568 }
1569
1570 // free buffer
1571 free(buf);
1572 return ifs;
1573 }
1574
1575 /*
1576 * Try to get the interface index.
1577 */
1578 static int getIndex(int sock, const char *name) {
1579 int index = if_nametoindex(name);
1580 return (index == 0) ? -1 : index;
1581 }
1582
1583 /*
1584 * Gets the Hardware address (usually MAC address) for the named interface.
1585 * On return puts the data in buf, and returns the length, in byte, of the
1586 * MAC address. Returns -1 if there is no hardware address on that interface.
1587 */
1588 static int getMacAddress
1589 (JNIEnv *env, const char *ifname, const struct in_addr *addr,
1590 unsigned char *buf)
1591 {
1592 int size;
1593 struct kinfo_ndd *nddp;
1594 void *end;
1595
1596 size = getkerninfo(KINFO_NDD, 0, 0, 0);
1597 if (size == 0) {
1598 return -1;
1599 }
1600
1601 if (size < 0) {
1602 perror("getkerninfo 1");
1603 return -1;
1604 }
1605
1606 nddp = (struct kinfo_ndd *)malloc(size);
1607
1608 if (!nddp) {
1609 JNU_ThrowOutOfMemoryError(env,
1610 "Network interface getMacAddress native buffer allocation failed");
1611 return -1;
1612 }
1613
1614 if (getkerninfo(KINFO_NDD, nddp, &size, 0) < 0) {
1615 perror("getkerninfo 2");
1616 free(nddp);
1617 return -1;
1618 }
1619
1620 end = (void *)nddp + size;
1621 while ((void *)nddp < end) {
1622 if (!strcmp(nddp->ndd_alias, ifname) ||
1623 !strcmp(nddp->ndd_name, ifname)) {
1624 bcopy(nddp->ndd_addr, buf, 6);
1625 free(nddp);
1626 return 6;
1627 } else {
1628 nddp++;
1629 }
1630 }
1631
1632 free(nddp);
1633 return -1;
1634 }
1635
1636 static int getMTU(JNIEnv *env, int sock, const char *ifname) {
1637 struct ifreq if2;
1638 memset((char *)&if2, 0, sizeof(if2));
1639 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
1640
1641 if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) {
1642 JNU_ThrowByNameWithMessageAndLastError
1643 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGIFMTU) failed");
1644 return -1;
1645 }
1646
1647 return if2.ifr_mtu;
1648 }
1649
1650 static int getFlags(int sock, const char *ifname, int *flags) {
1651 struct ifreq if2;
1652 memset((char *)&if2, 0, sizeof(if2));
1653 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
1654
1655 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0) {
1656 return -1;
1657 }
1658
1659 if (sizeof(if2.ifr_flags) == sizeof(short)) {
1660 *flags = (if2.ifr_flags & 0xffff);
1661 } else {
1662 *flags = if2.ifr_flags;
1663 }
1664 return 0;
1665 }
1666
1667 #endif /* _AIX */
1668
1669 /** Solaris **/
1670 #if defined(__solaris__)
1671
1672 /*
1673 * Opens a socket for further ioctl calls. Tries AF_INET socket first and
1674 * if it fails return AF_INET6 socket.
1675 */
1676 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
1677 int sock, alreadyV6 = 0;
1678 struct lifreq if2;
1679
1680 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1681 if (errno == EPROTONOSUPPORT || errno == EAFNOSUPPORT) {
1682 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1683 JNU_ThrowByNameWithMessageAndLastError
1684 (env, JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed");
1685 return -1;
1686 }
1687 alreadyV6 = 1;
1688 } else { // errno is not NOSUPPORT
1689 JNU_ThrowByNameWithMessageAndLastError
1690 (env, JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed");
1691 return -1;
1692 }
1693 }
1694
1695 // Solaris requires that we have an IPv6 socket to query an interface
1696 // without an IPv4 address - check it here. POSIX 1 require the kernel to
1697 // return ENOTTY if the call is inappropriate for a device e.g. the NETMASK
1698 // for a device having IPv6 only address but not all devices follow the
1699 // standard so fall back on any error. It's not an ecologically friendly
1700 // gesture but more reliable.
1701 if (!alreadyV6) {
1702 memset((char *)&if2, 0, sizeof(if2));
1703 strncpy(if2.lifr_name, ifname, sizeof(if2.lifr_name) - 1);
1704 if (ioctl(sock, SIOCGLIFNETMASK, (char *)&if2) < 0) {
1705 close(sock);
1706 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1707 JNU_ThrowByNameWithMessageAndLastError
1708 (env, JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed");
1709 return -1;
1710 }
1711 }
1712 }
1713
1714 return sock;
1715 }
1716
1717 /*
1718 * Enumerates and returns all IPv4 interfaces on Solaris.
1719 */
1720 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) {
1721 struct lifconf ifc;
1722 struct lifreq *ifreqP;
1723 struct lifnum numifs;
1724 char *buf = NULL;
1725 unsigned i;
1726
1727 // call SIOCGLIFNUM to get the interface count
1728 numifs.lifn_family = AF_INET;
1729 numifs.lifn_flags = 0;
1730 if (ioctl(sock, SIOCGLIFNUM, (char *)&numifs) < 0) {
1731 JNU_ThrowByNameWithMessageAndLastError
1732 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGLIFNUM) failed");
1733 return ifs;
1734 }
1735
1736 // call SIOCGLIFCONF to enumerate the interfaces
1737 ifc.lifc_len = numifs.lifn_count * sizeof(struct lifreq);
1738 CHECKED_MALLOC3(buf, char *, ifc.lifc_len);
1739 ifc.lifc_buf = buf;
1740 ifc.lifc_family = AF_INET;
1741 ifc.lifc_flags = 0;
1742 if (ioctl(sock, SIOCGLIFCONF, (char *)&ifc) < 0) {
1743 JNU_ThrowByNameWithMessageAndLastError
1744 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGLIFCONF) failed");
1745 free(buf);
1746 return ifs;
1747 }
1748
1749 // iterate through each interface
1750 ifreqP = ifc.lifc_req;
1751 for (i = 0; i < numifs.lifn_count; i++, ifreqP++) {
1752 struct sockaddr addr, *broadaddrP = NULL;
1753
1754 // ignore non IPv4 addresses
1755 if (ifreqP->lifr_addr.ss_family != AF_INET) {
1756 continue;
1757 }
1758
1759 // save socket address
1760 memcpy(&addr, &(ifreqP->lifr_addr), sizeof(struct sockaddr));
1761
1762 // determine broadcast address, if applicable
1763 if ((ioctl(sock, SIOCGLIFFLAGS, ifreqP) == 0) &&
1764 ifreqP->lifr_flags & IFF_BROADCAST) {
1765
1766 // restore socket address to ifreqP
1767 memcpy(&(ifreqP->lifr_addr), &addr, sizeof(struct sockaddr));
1768
1769 // query broadcast address and set pointer to it
1770 if (ioctl(sock, SIOCGLIFBRDADDR, ifreqP) == 0) {
1771 broadaddrP = (struct sockaddr *)&(ifreqP->lifr_broadaddr);
1772 }
1773 }
1774
1775 // add to the list
1776 ifs = addif(env, sock, ifreqP->lifr_name, ifs,
1777 &addr, broadaddrP, AF_INET, (short)ifreqP->lifr_addrlen);
1778
1779 // if an exception occurred we return immediately
1780 if ((*env)->ExceptionOccurred(env)) {
1781 free(buf);
1782 return ifs;
1783 }
1784 }
1785
1786 // free buffer
1787 free(buf);
1788 return ifs;
1789 }
1790
1791 /*
1792 * Enumerates and returns all IPv6 interfaces on Solaris.
1793 */
1794 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1795 struct lifconf ifc;
1796 struct lifreq *ifreqP;
1797 struct lifnum numifs;
1798 char *buf = NULL;
1799 unsigned i;
1800
1801 // call SIOCGLIFNUM to get the interface count
1802 numifs.lifn_family = AF_INET6;
1803 numifs.lifn_flags = 0;
1804 if (ioctl(sock, SIOCGLIFNUM, (char *)&numifs) < 0) {
1805 JNU_ThrowByNameWithMessageAndLastError
1806 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGLIFNUM) failed");
1807 return ifs;
1808 }
1809
1810 // call SIOCGLIFCONF to enumerate the interfaces
1811 ifc.lifc_len = numifs.lifn_count * sizeof(struct lifreq);
1812 CHECKED_MALLOC3(buf, char *, ifc.lifc_len);
1813 ifc.lifc_buf = buf;
1814 ifc.lifc_family = AF_INET6;
1815 ifc.lifc_flags = 0;
1816 if (ioctl(sock, SIOCGLIFCONF, (char *)&ifc) < 0) {
1817 JNU_ThrowByNameWithMessageAndLastError
1818 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGLIFCONF) failed");
1819 free(buf);
1820 return ifs;
1821 }
1822
1823 // iterate through each interface
1824 ifreqP = ifc.lifc_req;
1825 for (i = 0; i < numifs.lifn_count; i++, ifreqP++) {
1826
1827 // ignore non IPv6 addresses
1828 if (ifreqP->lifr_addr.ss_family != AF_INET6) {
1829 continue;
1830 }
1831
1832 // set scope ID to interface index
1833 ((struct sockaddr_in6 *)&(ifreqP->lifr_addr))->sin6_scope_id =
1834 getIndex(sock, ifreqP->lifr_name);
1835
1836 // add to the list
1837 ifs = addif(env, sock, ifreqP->lifr_name, ifs,
1838 (struct sockaddr *)&(ifreqP->lifr_addr),
1839 NULL, AF_INET6, (short)ifreqP->lifr_addrlen);
1840
1841 // if an exception occurred we return immediately
1842 if ((*env)->ExceptionOccurred(env)) {
1843 free(buf);
1844 return ifs;
1845 }
1846 }
1847
1848 // free buffer
1849 free(buf);
1850 return ifs;
1851 }
1852
1853 /*
1854 * Try to get the interface index.
1855 * (Not supported on Solaris 2.6 or 7)
1856 */
1857 static int getIndex(int sock, const char *name) {
1858 struct lifreq if2;
1859 memset((char *)&if2, 0, sizeof(if2));
1860 strncpy(if2.lifr_name, name, sizeof(if2.lifr_name) - 1);
1861
1862 if (ioctl(sock, SIOCGLIFINDEX, (char *)&if2) < 0) {
1863 return -1;
1864 }
1865
1866 return if2.lifr_index;
1867 }
1868
1869 /*
1870 * Solaris specific DLPI code to get hardware address from a device.
1871 * Unfortunately, at least up to Solaris X, you have to have special
1872 * privileges (i.e. be root).
1873 */
1874 static int getMacFromDevice
1875 (JNIEnv *env, const char *ifname, unsigned char *retbuf)
1876 {
1877 char style1dev[MAXPATHLEN];
1878 int fd;
1879 dl_phys_addr_req_t dlpareq;
1880 dl_phys_addr_ack_t *dlpaack;
1881 struct strbuf msg;
1882 char buf[128];
1883 int flags = 0;
1884
1885 // Device is in /dev. e.g.: /dev/bge0
1886 strcpy(style1dev, DEV_PREFIX);
1887 strcat(style1dev, ifname);
1888 if ((fd = open(style1dev, O_RDWR)) < 0) {
1889 // Can't open it. We probably are missing the privilege.
1890 // We'll have to try something else
1891 return 0;
1892 }
1893
1894 dlpareq.dl_primitive = DL_PHYS_ADDR_REQ;
1895 dlpareq.dl_addr_type = DL_CURR_PHYS_ADDR;
1896
1897 msg.buf = (char *)&dlpareq;
1898 msg.len = DL_PHYS_ADDR_REQ_SIZE;
1899
1900 if (putmsg(fd, &msg, NULL, 0) < 0) {
1901 JNU_ThrowByNameWithMessageAndLastError
1902 (env, JNU_JAVANETPKG "SocketException", "putmsg() failed");
1903 return -1;
1904 }
1905
1906 dlpaack = (dl_phys_addr_ack_t *)buf;
1907
1908 msg.buf = (char *)buf;
1909 msg.len = 0;
1910 msg.maxlen = sizeof (buf);
1911 if (getmsg(fd, &msg, NULL, &flags) < 0) {
1912 JNU_ThrowByNameWithMessageAndLastError
1913 (env, JNU_JAVANETPKG "SocketException", "getmsg() failed");
1914 return -1;
1915 }
1916
1917 if (msg.len < DL_PHYS_ADDR_ACK_SIZE || dlpaack->dl_primitive != DL_PHYS_ADDR_ACK) {
1918 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
1919 "Couldn't obtain phys addr\n");
1920 return -1;
1921 }
1922
1923 memcpy(retbuf, &buf[dlpaack->dl_addr_offset], dlpaack->dl_addr_length);
1924 return dlpaack->dl_addr_length;
1925 }
1926
1927 /*
1928 * Gets the Hardware address (usually MAC address) for the named interface.
1929 * On return puts the data in buf, and returns the length, in byte, of the
1930 * MAC address. Returns -1 if there is no hardware address on that interface.
1931 */
1932 static int getMacAddress
1933 (JNIEnv *env, const char *ifname, const struct in_addr *addr,
1934 unsigned char *buf)
1935 {
1936 struct lifreq if2;
1937 int len, i, sock;
1938
1939 if ((sock = openSocketWithFallback(env, ifname)) < 0) {
1940 return -1;
1941 }
1942
1943 // First, try the new (S11) SIOCGLIFHWADDR ioctl(). If that fails
1944 // try the old way.
1945 memset((char *)&if2, 0, sizeof(if2));
1946 strncpy(if2.lifr_name, ifname, sizeof(if2.lifr_name) - 1);
1947
1948 if (ioctl(sock, SIOCGLIFHWADDR, &if2) != -1) {
1949 struct sockaddr_dl *sp;
1950 sp = (struct sockaddr_dl *)&if2.lifr_addr;
1951 memcpy(buf, &sp->sdl_data[0], sp->sdl_alen);
1952 close(sock);
1953 return sp->sdl_alen;
1954 }
1955
1956 // On Solaris we have to use DLPI, but it will only work if we have
1957 // privileged access (i.e. root). If that fails, we try a lookup
1958 // in the ARP table, which requires an IPv4 address.
1959 if (((len = getMacFromDevice(env, ifname, buf)) == 0) && (addr != NULL)) {
1960 struct arpreq arpreq;
1961 struct sockaddr_in *sin;
1962 struct sockaddr_in ipAddr;
1963
1964 len = 6; //???
1965
1966 sin = (struct sockaddr_in *)&arpreq.arp_pa;
1967 memset((char *)&arpreq, 0, sizeof(struct arpreq));
1968 ipAddr.sin_port = 0;
1969 ipAddr.sin_family = AF_INET;
1970 memcpy(&ipAddr.sin_addr, addr, sizeof(struct in_addr));
1971 memcpy(&arpreq.arp_pa, &ipAddr, sizeof(struct sockaddr_in));
1972 arpreq.arp_flags= ATF_PUBL;
1973
1974 if (ioctl(sock, SIOCGARP, &arpreq) < 0) {
1975 close(sock);
1976 return -1;
1977 }
1978
1979 memcpy(buf, &arpreq.arp_ha.sa_data[0], len);
1980 }
1981 close(sock);
1982
1983 // all bytes to 0 means no hardware address
1984 for (i = 0; i < len; i++) {
1985 if (buf[i] != 0)
1986 return len;
1987 }
1988
1989 return -1;
1990 }
1991
1992 static int getMTU(JNIEnv *env, int sock, const char *ifname) {
1993 struct lifreq if2;
1994 memset((char *)&if2, 0, sizeof(if2));
1995 strncpy(if2.lifr_name, ifname, sizeof(if2.lifr_name) - 1);
1996
1997 if (ioctl(sock, SIOCGLIFMTU, (char *)&if2) < 0) {
1998 JNU_ThrowByNameWithMessageAndLastError
1999 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGLIFMTU) failed");
2000 return -1;
2001 }
2002
2003 return if2.lifr_mtu;
2004 }
2005
2006 static int getFlags(int sock, const char *ifname, int *flags) {
2007 struct lifreq if2;
2008 memset((char *)&if2, 0, sizeof(if2));
2009 strncpy(if2.lifr_name, ifname, sizeof(if2.lifr_name) - 1);
2010
2011 if (ioctl(sock, SIOCGLIFFLAGS, (char *)&if2) < 0) {
2012 return -1;
2013 }
2014
2015 *flags = if2.lifr_flags;
2016 return 0;
2017 }
2018
2019 #endif /* __solaris__ */
2020
2021 /** BSD **/
2022 #if defined(_ALLBSD_SOURCE)
2023
2024 /*
2025 * Opens a socket for further ioctl calls. Tries AF_INET socket first and
2026 * if it fails return AF_INET6 socket.
2027 */
2028 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
2029 int sock;
2030
2031 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
2032 if (errno == EPROTONOSUPPORT || errno == EAFNOSUPPORT) {
2033 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
2034 JNU_ThrowByNameWithMessageAndLastError
2035 (env, JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed");
2036 return -1;
2037 }
2038 } else { // errno is not NOSUPPORT
2039 JNU_ThrowByNameWithMessageAndLastError
2040 (env, JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed");
2041 return -1;
2042 }
2043 }
2044
2045 return sock;
2046 }
2047
2048 /*
2049 * Enumerates and returns all IPv4 interfaces on BSD.
2050 */
2051 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) {
2052 struct ifaddrs *ifa, *origifa;
2053
2054 if (getifaddrs(&origifa) != 0) {
2055 JNU_ThrowByNameWithMessageAndLastError
2056 (env, JNU_JAVANETPKG "SocketException", "getifaddrs() failed");
2057 return ifs;
2058 }
2059
2060 for (ifa = origifa; ifa != NULL; ifa = ifa->ifa_next) {
2061 struct sockaddr *broadaddrP = NULL;
2062
2063 // ignore non IPv4 addresses
2064 if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET)
2065 continue;
2066
2067 // set ifa_broadaddr, if there is one
2068 if ((ifa->ifa_flags & IFF_POINTOPOINT) == 0 &&
2069 ifa->ifa_flags & IFF_BROADCAST) {
2070 broadaddrP = ifa->ifa_dstaddr;
2071 }
2072
2073 // add interface to the list
2074 ifs = addif(env, sock, ifa->ifa_name, ifs, ifa->ifa_addr,
2075 broadaddrP, AF_INET,
2076 translateIPv4AddressToPrefix((struct sockaddr_in *)
2077 ifa->ifa_netmask));
2078
2079 // if an exception occurred then free the list
2080 if ((*env)->ExceptionOccurred(env)) {
2081 freeifaddrs(origifa);
2082 freeif(ifs);
2083 return NULL;
2084 }
2085 }
2086
2087 // free ifaddrs buffer
2088 freeifaddrs(origifa);
2089 return ifs;
2090 }
2091
2092 /*
2093 * Enumerates and returns all IPv6 interfaces on BSD.
2094 */
2095 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
2096 struct ifaddrs *ifa, *origifa;
2097
2098 if (getifaddrs(&origifa) != 0) {
2099 JNU_ThrowByNameWithMessageAndLastError
2100 (env, JNU_JAVANETPKG "SocketException", "getifaddrs() failed");
2101 return ifs;
2102 }
2103
2104 for (ifa = origifa; ifa != NULL; ifa = ifa->ifa_next) {
2105 // ignore non IPv6 addresses
2106 if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET6)
2107 continue;
2108
2109 // set scope ID to interface index
2110 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id =
2111 getIndex(sock, ifa->ifa_name);
2112
2113 // add interface to the list
2114 ifs = addif(env, sock, ifa->ifa_name, ifs, ifa->ifa_addr, NULL,
2115 AF_INET6,
2116 translateIPv6AddressToPrefix((struct sockaddr_in6 *)
2117 ifa->ifa_netmask));
2118
2119 // if an exception occurred then free the list
2120 if ((*env)->ExceptionOccurred(env)) {
2121 freeifaddrs(origifa);
2122 freeif(ifs);
2123 return NULL;
2124 }
2125 }
2126
2127 // free ifaddrs buffer
2128 freeifaddrs(origifa);
2129 return ifs;
2130 }
2131
2132 /*
2133 * Try to get the interface index.
2134 */
2135 static int getIndex(int sock, const char *name) {
2136 #if !defined(__FreeBSD__)
2137 int index = if_nametoindex(name);
2138 return (index == 0) ? -1 : index;
2139 #else
2140 struct ifreq if2;
2141 memset((char *)&if2, 0, sizeof(if2));
2142 strncpy(if2.ifr_name, name, sizeof(if2.ifr_name) - 1);
2143
2144 if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) {
2145 return -1;
2146 }
2147
2148 return if2.ifr_index;
2149 #endif
2150 }
2151
2152 /*
2153 * Gets the Hardware address (usually MAC address) for the named interface.
2154 * On return puts the data in buf, and returns the length, in byte, of the
2155 * MAC address. Returns -1 if there is no hardware address on that interface.
2156 */
2157 static int getMacAddress
2158 (JNIEnv *env, const char *ifname, const struct in_addr *addr,
2159 unsigned char *buf)
2160 {
2161 struct ifaddrs *ifa0, *ifa;
2162 struct sockaddr *saddr;
2163 int i;
2164
2165 // grab the interface list
2166 if (!getifaddrs(&ifa0)) {
2167 // cycle through the interfaces
2168 for (i = 0, ifa = ifa0; ifa != NULL; ifa = ifa->ifa_next, i++) {
2169 saddr = ifa->ifa_addr;
2170 if (saddr != NULL) {
2171 // link layer contains the MAC address
2172 if (saddr->sa_family == AF_LINK && !strcmp(ifname, ifa->ifa_name)) {
2173 struct sockaddr_dl *sadl = (struct sockaddr_dl *) saddr;
2174 // check the address has the correct length
2175 if (sadl->sdl_alen == ETHER_ADDR_LEN) {
2176 memcpy(buf, (sadl->sdl_data + sadl->sdl_nlen), ETHER_ADDR_LEN);
2177 freeifaddrs(ifa0);
2178 return ETHER_ADDR_LEN;
2179 }
2180 }
2181 }
2182 }
2183 freeifaddrs(ifa0);
2184 }
2185
2186 return -1;
2187 }
2188
2189 static int getMTU(JNIEnv *env, int sock, const char *ifname) {
2190 struct ifreq if2;
2191 memset((char *)&if2, 0, sizeof(if2));
2192 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
2193
2194 if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) {
2195 JNU_ThrowByNameWithMessageAndLastError
2196 (env, JNU_JAVANETPKG "SocketException", "ioctl(SIOCGIFMTU) failed");
2197 return -1;
2198 }
2199
2200 return if2.ifr_mtu;
2201 }
2202
2203 static int getFlags(int sock, const char *ifname, int *flags) {
2204 struct ifreq if2;
2205 memset((char *)&if2, 0, sizeof(if2));
2206 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
2207
2208 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0) {
2209 return -1;
2210 }
2211
2212 if (sizeof(if2.ifr_flags) == sizeof(short)) {
2213 *flags = (if2.ifr_flags & 0xffff);
2214 } else {
2215 *flags = if2.ifr_flags;
2216 }
2217 return 0;
2218 }
2219 #endif /* _ALLBSD_SOURCE */