1 /*
2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include <errno.h>
27 #include <strings.h>
28 #if defined(_ALLBSD_SOURCE) && defined(__OpenBSD__)
29 #include <sys/types.h>
30 #endif
31 #include <netinet/in.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/types.h>
35 #include <sys/socket.h>
36 #include <arpa/inet.h>
37 #include <net/if.h>
38 #include <net/if_arp.h>
39
40 #if defined(__solaris__)
41 #include <sys/dlpi.h>
42 #include <fcntl.h>
43 #include <stropts.h>
44 #include <sys/sockio.h>
45 #endif
46
47 #if defined(__linux__)
48 #include <sys/ioctl.h>
49 #include <bits/ioctls.h>
50 #include <sys/utsname.h>
51 #include <stdio.h>
52 #endif
53
54 #if defined(_AIX)
55 #include <sys/ioctl.h>
56 #include <netinet/in6_var.h>
57 #include <sys/ndd_var.h>
58 #include <sys/kinfo.h>
59 #endif
60
61 #if defined(_ALLBSD_SOURCE)
62 #include <sys/param.h>
63 #include <sys/ioctl.h>
64 #include <sys/sockio.h>
65 #if defined(__APPLE__)
66 #include <net/ethernet.h>
67 #include <net/if_var.h>
68 #include <net/if_dl.h>
69 #include <netinet/in_var.h>
70 #include <ifaddrs.h>
71 #endif
72 #endif
73
74 #include "jvm.h"
75 #include "jni_util.h"
76 #include "net_util.h"
77
78 #if defined(__linux__)
79 #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
80 #endif
81
82 typedef struct _netaddr {
83 struct sockaddr *addr;
84 struct sockaddr *brdcast;
85 short mask;
86 int family; /* to make searches simple */
87 struct _netaddr *next;
88 } netaddr;
89
90 typedef struct _netif {
91 char *name;
92 int index;
93 char virtual;
94 netaddr *addr;
95 struct _netif *childs;
96 struct _netif *next;
97 } netif;
98
99 /************************************************************************
100 * NetworkInterface
101 */
102
103 #include "java_net_NetworkInterface.h"
104
105 /************************************************************************
106 * NetworkInterface
107 */
108 jclass ni_class;
109 jfieldID ni_nameID;
110 jfieldID ni_indexID;
111 jfieldID ni_descID;
112 jfieldID ni_addrsID;
113 jfieldID ni_bindsID;
114 jfieldID ni_virutalID;
115 jfieldID ni_childsID;
116 jfieldID ni_parentID;
117 jfieldID ni_defaultIndexID;
118 jmethodID ni_ctrID;
119
120 static jclass ni_ibcls;
121 static jmethodID ni_ibctrID;
122 static jfieldID ni_ibaddressID;
123 static jfieldID ni_ib4broadcastID;
124 static jfieldID ni_ib4maskID;
125
126 /** Private methods declarations **/
127 static jobject createNetworkInterface(JNIEnv *env, netif *ifs);
128 static int getFlags0(JNIEnv *env, jstring ifname);
129
130 static netif *enumInterfaces(JNIEnv *env);
131 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs);
132
133 #ifdef AF_INET6
134 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs);
135 #endif
136
137 static netif *addif(JNIEnv *env, int sock, const char *if_name, netif *ifs,
138 struct sockaddr *ifr_addrP, struct sockaddr *ifr_broadaddrP,
139 struct sockaddr *ifr_subnetaddrP, int family, short prefix);
140 static void freeif(netif *ifs);
141
142 static int openSocket(JNIEnv *env, int proto);
143 static int openSocketWithFallback(JNIEnv *env, const char *ifname);
144
145
146 static struct sockaddr *getBroadcast(JNIEnv *env, int sock, const char *name,
147 struct sockaddr *brdcast_store);
148 static short getSubnet(JNIEnv *env, int sock, const char *ifname);
149 static short computeMaskFromAddress(struct sockaddr *ifr_subnetaddrP);
150 static int getIndex(int sock, const char *ifname);
151
152 static int getFlags(int sock, const char *ifname, int *flags);
153 static int getMacAddress(JNIEnv *env, int sock, const char *ifname,
154 const struct in_addr *addr, unsigned char *buf);
155 static int getMTU(JNIEnv *env, int sock, const char *ifname);
156
157
158 #if defined(__solaris__)
159 static netif *enumIPvXInterfaces(JNIEnv *env, int sock, netif *ifs, int family);
160 static int getMacFromDevice(JNIEnv *env, const char *ifname,
161 unsigned char *retbuf);
162
163 #ifndef SIOCGLIFHWADDR
164 #define SIOCGLIFHWADDR _IOWR('i', 192, struct lifreq)
165 #endif
166
167 #endif
168
169 /******************* Java entry points *****************************/
170
171 /*
172 * Class: java_net_NetworkInterface
173 * Method: init
174 * Signature: ()V
175 */
176 JNIEXPORT void JNICALL Java_java_net_NetworkInterface_init
177 (JNIEnv *env, jclass cls)
178 {
179 ni_class = (*env)->FindClass(env, "java/net/NetworkInterface");
180 CHECK_NULL(ni_class);
181 ni_class = (*env)->NewGlobalRef(env, ni_class);
182 CHECK_NULL(ni_class);
183 ni_nameID = (*env)->GetFieldID(env, ni_class, "name", "Ljava/lang/String;");
184 CHECK_NULL(ni_nameID);
185 ni_indexID = (*env)->GetFieldID(env, ni_class, "index", "I");
186 CHECK_NULL(ni_indexID);
187 ni_addrsID = (*env)->GetFieldID(env, ni_class, "addrs",
188 "[Ljava/net/InetAddress;");
189 CHECK_NULL(ni_addrsID);
190 ni_bindsID = (*env)->GetFieldID(env, ni_class, "bindings",
191 "[Ljava/net/InterfaceAddress;");
192 CHECK_NULL(ni_bindsID);
193 ni_descID = (*env)->GetFieldID(env, ni_class, "displayName",
194 "Ljava/lang/String;");
195 CHECK_NULL(ni_descID);
196 ni_virutalID = (*env)->GetFieldID(env, ni_class, "virtual", "Z");
197 CHECK_NULL(ni_virutalID);
198 ni_childsID = (*env)->GetFieldID(env, ni_class, "childs",
199 "[Ljava/net/NetworkInterface;");
200 CHECK_NULL(ni_childsID);
201 ni_parentID = (*env)->GetFieldID(env, ni_class, "parent",
202 "Ljava/net/NetworkInterface;");
203 CHECK_NULL(ni_parentID);
204 ni_ctrID = (*env)->GetMethodID(env, ni_class, "<init>", "()V");
205 CHECK_NULL(ni_ctrID);
206 ni_ibcls = (*env)->FindClass(env, "java/net/InterfaceAddress");
207 CHECK_NULL(ni_ibcls);
208 ni_ibcls = (*env)->NewGlobalRef(env, ni_ibcls);
209 CHECK_NULL(ni_ibcls);
210 ni_ibctrID = (*env)->GetMethodID(env, ni_ibcls, "<init>", "()V");
211 CHECK_NULL(ni_ibctrID);
212 ni_ibaddressID = (*env)->GetFieldID(env, ni_ibcls, "address",
213 "Ljava/net/InetAddress;");
214 CHECK_NULL(ni_ibaddressID);
215 ni_ib4broadcastID = (*env)->GetFieldID(env, ni_ibcls, "broadcast",
216 "Ljava/net/Inet4Address;");
217 CHECK_NULL(ni_ib4broadcastID);
218 ni_ib4maskID = (*env)->GetFieldID(env, ni_ibcls, "maskLength", "S");
219 CHECK_NULL(ni_ib4maskID);
220 ni_defaultIndexID = (*env)->GetStaticFieldID(env, ni_class, "defaultIndex",
221 "I");
222 CHECK_NULL(ni_defaultIndexID);
223 initInetAddressIDs(env);
224 }
225
226 /*
227 * Class: java_net_NetworkInterface
228 * Method: getByName0
229 * Signature: (Ljava/lang/String;)Ljava/net/NetworkInterface;
230 */
231 JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByName0
232 (JNIEnv *env, jclass cls, jstring name)
233 {
234 netif *ifs, *curr;
235 jboolean isCopy;
236 const char* name_utf;
237 jobject obj = NULL;
238
239 ifs = enumInterfaces(env);
240 if (ifs == NULL) {
241 return NULL;
242 }
243
244 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
245 if (name_utf == NULL) {
246 if (!(*env)->ExceptionCheck(env))
247 JNU_ThrowOutOfMemoryError(env, NULL);
248 freeif(ifs);
249 return NULL;
250 }
251
252 // Search the list of interface based on name
253 curr = ifs;
254 while (curr != NULL) {
255 if (strcmp(name_utf, curr->name) == 0) {
256 break;
257 }
258 curr = curr->next;
259 }
260
261 // if found create a NetworkInterface
262 if (curr != NULL) {;
263 obj = createNetworkInterface(env, curr);
264 }
265
266 // release the UTF string and interface list
267 (*env)->ReleaseStringUTFChars(env, name, name_utf);
268 freeif(ifs);
269
270 return obj;
271 }
272
273 /*
274 * Class: java_net_NetworkInterface
275 * Method: getByIndex0
276 * Signature: (Ljava/lang/String;)Ljava/net/NetworkInterface;
277 */
278 JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByIndex0
279 (JNIEnv *env, jclass cls, jint index)
280 {
281 netif *ifs, *curr;
282 jobject obj = NULL;
283
284 if (index <= 0) {
285 return NULL;
286 }
287 ifs = enumInterfaces(env);
288 if (ifs == NULL) {
289 return NULL;
290 }
291
292 // Search the list of interface based on index
293 curr = ifs;
294 while (curr != NULL) {
295 if (index == curr->index) {
296 break;
297 }
298 curr = curr->next;
299 }
300
301 // if found create a NetworkInterface
302 if (curr != NULL) {;
303 obj = createNetworkInterface(env, curr);
304 }
305
306 freeif(ifs);
307 return obj;
308 }
309
310 /*
311 * Class: java_net_NetworkInterface
312 * Method: getByInetAddress0
313 * Signature: (Ljava/net/InetAddress;)Ljava/net/NetworkInterface;
314 */
315 JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByInetAddress0
316 (JNIEnv *env, jclass cls, jobject iaObj)
317 {
318 netif *ifs, *curr;
319
320 #ifdef AF_INET6
321 int family = (getInetAddress_family(env, iaObj) == IPv4) ? AF_INET : AF_INET6;
322 #else
323 int family = AF_INET;
324 #endif
325
326 jobject obj = NULL;
327 jboolean match = JNI_FALSE;
328
329 ifs = enumInterfaces(env);
330 if (ifs == NULL) {
331 return NULL;
332 }
333
334 curr = ifs;
335 while (curr != NULL) {
336 netaddr *addrP = curr->addr;
337
338 // Iterate through each address on the interface
339 while (addrP != NULL) {
340
341 if (family == addrP->family) {
342 if (family == AF_INET) {
343 int address1 = htonl(
344 ((struct sockaddr_in*)addrP->addr)->sin_addr.s_addr);
345 int address2 = getInetAddress_addr(env, iaObj);
346
347 if (address1 == address2) {
348 match = JNI_TRUE;
349 break;
350 }
351 }
352
353 #ifdef AF_INET6
354 if (family == AF_INET6) {
355 jbyte *bytes = (jbyte *)&(
356 ((struct sockaddr_in6*)addrP->addr)->sin6_addr);
357 jbyte caddr[16];
358 int i;
359 getInet6Address_ipaddress(env, iaObj, (char *)caddr);
360 i = 0;
361 while (i < 16) {
362 if (caddr[i] != bytes[i]) {
363 break;
364 }
365 i++;
366 }
367 if (i >= 16) {
368 match = JNI_TRUE;
369 break;
370 }
371 }
372 #endif
373 }
374
375 if (match) {
376 break;
377 }
378 addrP = addrP->next;
379 }
380
381 if (match) {
382 break;
383 }
384 curr = curr->next;
385 }
386
387 // if found create a NetworkInterface
388 if (match) {;
389 obj = createNetworkInterface(env, curr);
390 }
391
392 freeif(ifs);
393 return obj;
394 }
395
396 /*
397 * Class: java_net_NetworkInterface
398 * Method: getAll
399 * Signature: ()[Ljava/net/NetworkInterface;
400 */
401 JNIEXPORT jobjectArray JNICALL Java_java_net_NetworkInterface_getAll
402 (JNIEnv *env, jclass cls)
403 {
404 netif *ifs, *curr;
405 jobjectArray netIFArr;
406 jint arr_index, ifCount;
407
408 ifs = enumInterfaces(env);
409 if (ifs == NULL) {
410 return NULL;
411 }
412
413 // count the interface
414 ifCount = 0;
415 curr = ifs;
416 while (curr != NULL) {
417 ifCount++;
418 curr = curr->next;
419 }
420
421 // allocate a NetworkInterface array
422 netIFArr = (*env)->NewObjectArray(env, ifCount, cls, NULL);
423 if (netIFArr == NULL) {
424 freeif(ifs);
425 return NULL;
426 }
427
428 // Iterate through the interfaces, create a NetworkInterface instance
429 // for each array element and populate the object.
430 curr = ifs;
431 arr_index = 0;
432 while (curr != NULL) {
433 jobject netifObj;
434
435 netifObj = createNetworkInterface(env, curr);
436 if (netifObj == NULL) {
437 freeif(ifs);
438 return NULL;
439 }
440
441 // put the NetworkInterface into the array
442 (*env)->SetObjectArrayElement(env, netIFArr, arr_index++, netifObj);
443
444 curr = curr->next;
445 }
446
447 freeif(ifs);
448 return netIFArr;
449 }
450
451 /*
452 * Class: java_net_NetworkInterface
453 * Method: isUp0
454 * Signature: (Ljava/lang/String;I)Z
455 */
456 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isUp0
457 (JNIEnv *env, jclass cls, jstring name, jint index)
458 {
459 int ret = getFlags0(env, name);
460 return ((ret & IFF_UP) && (ret & IFF_RUNNING)) ? JNI_TRUE : JNI_FALSE;
461 }
462
463 /*
464 * Class: java_net_NetworkInterface
465 * Method: isP2P0
466 * Signature: (Ljava/lang/String;I)Z
467 */
468 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isP2P0
469 (JNIEnv *env, jclass cls, jstring name, jint index)
470 {
471 int ret = getFlags0(env, name);
472 return (ret & IFF_POINTOPOINT) ? JNI_TRUE : JNI_FALSE;
473 }
474
475 /*
476 * Class: java_net_NetworkInterface
477 * Method: isLoopback0
478 * Signature: (Ljava/lang/String;I)Z
479 */
480 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isLoopback0
481 (JNIEnv *env, jclass cls, jstring name, jint index)
482 {
483 int ret = getFlags0(env, name);
484 return (ret & IFF_LOOPBACK) ? JNI_TRUE : JNI_FALSE;
485 }
486
487 /*
488 * Class: java_net_NetworkInterface
489 * Method: supportsMulticast0
490 * Signature: (Ljava/lang/String;I)Z
491 */
492 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_supportsMulticast0
493 (JNIEnv *env, jclass cls, jstring name, jint index)
494 {
495 int ret = getFlags0(env, name);
496 return (ret & IFF_MULTICAST) ? JNI_TRUE : JNI_FALSE;
497 }
498
499 /*
500 * Class: java_net_NetworkInterface
501 * Method: getMacAddr0
502 * Signature: ([bLjava/lang/String;I)[b
503 */
504 JNIEXPORT jbyteArray JNICALL Java_java_net_NetworkInterface_getMacAddr0
505 (JNIEnv *env, jclass cls, jbyteArray addrArray, jstring name, jint index)
506 {
507 jint addr;
508 jbyte caddr[4];
509 struct in_addr iaddr;
510 jbyteArray ret = NULL;
511 unsigned char mac[16];
512 int len;
513 int sock;
514 jboolean isCopy;
515 const char* name_utf;
516
517 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
518 if (name_utf == NULL) {
519 if (!(*env)->ExceptionCheck(env))
520 JNU_ThrowOutOfMemoryError(env, NULL);
521 return NULL;
522 }
523 if ((sock = openSocketWithFallback(env, name_utf)) < 0) {
524 (*env)->ReleaseStringUTFChars(env, name, name_utf);
525 return NULL;
526 }
527
528 if (!IS_NULL(addrArray)) {
529 (*env)->GetByteArrayRegion(env, addrArray, 0, 4, caddr);
530 addr = ((caddr[0]<<24) & 0xff000000);
531 addr |= ((caddr[1] <<16) & 0xff0000);
532 addr |= ((caddr[2] <<8) & 0xff00);
533 addr |= (caddr[3] & 0xff);
534 iaddr.s_addr = htonl(addr);
535 len = getMacAddress(env, sock, name_utf, &iaddr, mac);
536 } else {
537 len = getMacAddress(env, sock, name_utf, NULL, mac);
538 }
539 if (len > 0) {
540 ret = (*env)->NewByteArray(env, len);
541 if (IS_NULL(ret)) {
542 /* we may have memory to free at the end of this */
543 goto fexit;
544 }
545 (*env)->SetByteArrayRegion(env, ret, 0, len, (jbyte *)(mac));
546 }
547 fexit:
548 // release the UTF string and interface list
549 (*env)->ReleaseStringUTFChars(env, name, name_utf);
550
551 close(sock);
552 return ret;
553 }
554
555 /*
556 * Class: java_net_NetworkInterface
557 * Method: getMTU0
558 * Signature: ([bLjava/lang/String;I)I
559 */
560 JNIEXPORT jint JNICALL Java_java_net_NetworkInterface_getMTU0
561 (JNIEnv *env, jclass cls, jstring name, jint index)
562 {
563 jboolean isCopy;
564 int ret = -1;
565 int sock;
566 const char* name_utf = NULL;
567
568 if (name != NULL) {
569 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
570 } else {
571 JNU_ThrowNullPointerException(env, "network interface name is NULL");
572 return ret;
573 }
574 if (name_utf == NULL) {
575 if (!(*env)->ExceptionCheck(env))
576 JNU_ThrowOutOfMemoryError(env, NULL);
577 return ret;
578 }
579
580 if ((sock = openSocketWithFallback(env, name_utf)) < 0) {
581 (*env)->ReleaseStringUTFChars(env, name, name_utf);
582 return JNI_FALSE;
583 }
584
585 ret = getMTU(env, sock, name_utf);
586
587 (*env)->ReleaseStringUTFChars(env, name, name_utf);
588
589 close(sock);
590 return ret;
591 }
592
593 /*** Private methods definitions ****/
594
595 static int getFlags0(JNIEnv *env, jstring name) {
596 jboolean isCopy;
597 int ret, sock;
598 const char* name_utf;
599 int flags = 0;
600
601 if (name != NULL) {
602 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy);
603 } else {
604 JNU_ThrowNullPointerException(env, "network interface name is NULL");
605 return -1;
606 }
607
608 if (name_utf == NULL) {
609 if (!(*env)->ExceptionCheck(env))
610 JNU_ThrowOutOfMemoryError(env, NULL);
611 return -1;
612 }
613 if ((sock = openSocketWithFallback(env, name_utf)) < 0) {
614 (*env)->ReleaseStringUTFChars(env, name, name_utf);
615 return -1;
616 }
617
618 ret = getFlags(sock, name_utf, &flags);
619
620 close(sock);
621 (*env)->ReleaseStringUTFChars(env, name, name_utf);
622
623 if (ret < 0) {
624 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
625 "ioctl SIOCGLIFFLAGS failed");
626 return -1;
627 }
628
629 return flags;
630 }
631
632 /*
633 * Creates a NetworkInterface object, populates the name, the index, and
634 * populates the InetAddress array based on the IP addresses for this
635 * interface.
636 */
637 jobject createNetworkInterface(JNIEnv *env, netif *ifs) {
638 jobject netifObj;
639 jobject name;
640 jobjectArray addrArr;
641 jobjectArray bindArr;
642 jobjectArray childArr;
643 netaddr *addrs;
644 jint addr_index, addr_count, bind_index;
645 jint child_count, child_index;
646 netaddr *addrP;
647 netif *childP;
648 jobject tmp;
649
650 // Create a NetworkInterface object and populate it
651 netifObj = (*env)->NewObject(env, ni_class, ni_ctrID);
652 CHECK_NULL_RETURN(netifObj, NULL);
653 name = (*env)->NewStringUTF(env, ifs->name);
654 CHECK_NULL_RETURN(name, NULL);
655 (*env)->SetObjectField(env, netifObj, ni_nameID, name);
656 (*env)->SetObjectField(env, netifObj, ni_descID, name);
657 (*env)->SetIntField(env, netifObj, ni_indexID, ifs->index);
658 (*env)->SetBooleanField(env, netifObj, ni_virutalID,
659 ifs->virtual ? JNI_TRUE : JNI_FALSE);
660
661 //Count the number of address on this interface
662 addr_count = 0;
663 addrP = ifs->addr;
664 while (addrP != NULL) {
665 addr_count++;
666 addrP = addrP->next;
667 }
668
669 // Create the array of InetAddresses
670 addrArr = (*env)->NewObjectArray(env, addr_count, ia_class, NULL);
671 if (addrArr == NULL) {
672 return NULL;
673 }
674
675 bindArr = (*env)->NewObjectArray(env, addr_count, ni_ibcls, NULL);
676 if (bindArr == NULL) {
677 return NULL;
678 }
679 addrP = ifs->addr;
680 addr_index = 0;
681 bind_index = 0;
682 while (addrP != NULL) {
683 jobject iaObj = NULL;
684 jobject ibObj = NULL;
685
686 if (addrP->family == AF_INET) {
687 iaObj = (*env)->NewObject(env, ia4_class, ia4_ctrID);
688 if (iaObj) {
689 setInetAddress_addr(env, iaObj, htonl(
690 ((struct sockaddr_in*)addrP->addr)->sin_addr.s_addr));
691 } else {
692 return NULL;
693 }
694 ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID);
695 if (ibObj) {
696 (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj);
697 if (addrP->brdcast) {
698 jobject ia2Obj = NULL;
699 ia2Obj = (*env)->NewObject(env, ia4_class, ia4_ctrID);
700 if (ia2Obj) {
701 setInetAddress_addr(env, ia2Obj, htonl(
702 ((struct sockaddr_in*)addrP->brdcast)->sin_addr.s_addr));
703 (*env)->SetObjectField(env, ibObj, ni_ib4broadcastID, ia2Obj);
704 } else {
705 return NULL;
706 }
707 }
708 (*env)->SetShortField(env, ibObj, ni_ib4maskID, addrP->mask);
709 (*env)->SetObjectArrayElement(env, bindArr, bind_index++, ibObj);
710 } else {
711 return NULL;
712 }
713 }
714
715 #ifdef AF_INET6
716 if (addrP->family == AF_INET6) {
717 int scope=0;
718 iaObj = (*env)->NewObject(env, ia6_class, ia6_ctrID);
719 if (iaObj) {
720 jboolean ret = setInet6Address_ipaddress(env, iaObj,
721 (char *)&(((struct sockaddr_in6*)addrP->addr)->sin6_addr));
722 if (ret == JNI_FALSE) {
723 return NULL;
724 }
725
726 scope = ((struct sockaddr_in6*)addrP->addr)->sin6_scope_id;
727
728 if (scope != 0) { /* zero is default value, no need to set */
729 setInet6Address_scopeid(env, iaObj, scope);
730 setInet6Address_scopeifname(env, iaObj, netifObj);
731 }
732 } else {
733 return NULL;
734 }
735 ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID);
736 if (ibObj) {
737 (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj);
738 (*env)->SetShortField(env, ibObj, ni_ib4maskID, addrP->mask);
739 (*env)->SetObjectArrayElement(env, bindArr, bind_index++, ibObj);
740 } else {
741 return NULL;
742 }
743 }
744 #endif
745
746 (*env)->SetObjectArrayElement(env, addrArr, addr_index++, iaObj);
747 addrP = addrP->next;
748 }
749
750 // See if there is any virtual interface attached to this one.
751 child_count = 0;
752 childP = ifs->childs;
753 while (childP) {
754 child_count++;
755 childP = childP->next;
756 }
757
758 childArr = (*env)->NewObjectArray(env, child_count, ni_class, NULL);
759 if (childArr == NULL) {
760 return NULL;
761 }
762
763 // Create the NetworkInterface instances for the sub-interfaces as well.
764 child_index = 0;
765 childP = ifs->childs;
766 while(childP) {
767 tmp = createNetworkInterface(env, childP);
768 if (tmp == NULL) {
769 return NULL;
770 }
771 (*env)->SetObjectField(env, tmp, ni_parentID, netifObj);
772 (*env)->SetObjectArrayElement(env, childArr, child_index++, tmp);
773 childP = childP->next;
774 }
775 (*env)->SetObjectField(env, netifObj, ni_addrsID, addrArr);
776 (*env)->SetObjectField(env, netifObj, ni_bindsID, bindArr);
777 (*env)->SetObjectField(env, netifObj, ni_childsID, childArr);
778
779 // return the NetworkInterface
780 return netifObj;
781 }
782
783 /*
784 * Enumerates all interfaces
785 */
786 static netif *enumInterfaces(JNIEnv *env) {
787 netif *ifs;
788 int sock;
789
790 // Enumerate IPv4 addresses
791 sock = openSocket(env, AF_INET);
792 if (sock < 0 && (*env)->ExceptionOccurred(env)) {
793 return NULL;
794 }
795
796 ifs = enumIPv4Interfaces(env, sock, NULL);
797 close(sock);
798
799 if (ifs == NULL && (*env)->ExceptionOccurred(env)) {
800 return NULL;
801 }
802
803 // return partial list if an exception occurs in the middle of process ???
804
805 // If IPv6 is available then enumerate IPv6 addresses.
806 #ifdef AF_INET6
807
808 // User can disable ipv6 explicitly by -Djava.net.preferIPv4Stack=true,
809 // so we have to call ipv6_available()
810 if (ipv6_available()) {
811
812 sock = openSocket(env, AF_INET6);
813 if (sock < 0 && (*env)->ExceptionOccurred(env)) {
814 freeif(ifs);
815 return NULL;
816 }
817
818 ifs = enumIPv6Interfaces(env, sock, ifs);
819 close(sock);
820
821 if ((*env)->ExceptionOccurred(env)) {
822 freeif(ifs);
823 return NULL;
824 }
825
826 }
827 #endif
828
829 return ifs;
830 }
831
832 #define CHECKED_MALLOC3(_pointer, _type, _size) \
833 do { \
834 _pointer = (_type)malloc(_size); \
835 if (_pointer == NULL) { \
836 JNU_ThrowOutOfMemoryError(env, "Native heap allocation failed"); \
837 return ifs; /* return untouched list */ \
838 } \
839 } while(0)
840
841
842 /*
843 * Frees an interface list (including any attached addresses)
844 */
845 void freeif(netif *ifs) {
846 netif *currif = ifs;
847 netif *child = NULL;
848
849 while (currif != NULL) {
850 netaddr *addrP = currif->addr;
851 while (addrP != NULL) {
852 netaddr *next = addrP->next;
853 free(addrP);
854 addrP = next;
855 }
856
857 // Don't forget to free the sub-interfaces.
858 if (currif->childs != NULL) {
859 freeif(currif->childs);
860 }
861
862 ifs = currif->next;
863 free(currif);
864 currif = ifs;
865 }
866 }
867
868 netif *addif(JNIEnv *env, int sock, const char *if_name, netif *ifs,
869 struct sockaddr *ifr_addrP, struct sockaddr *ifr_broadaddrP,
870 struct sockaddr *ifr_subnetaddrP, int family, short prefix)
871 {
872 netif *currif = ifs, *parent;
873 netaddr *addrP;
874
875 #ifdef LIFNAMSIZ
876 int ifnam_size = LIFNAMSIZ;
877 char name[LIFNAMSIZ], vname[LIFNAMSIZ];
878 #else
879 int ifnam_size = IFNAMSIZ;
880 char name[IFNAMSIZ], vname[IFNAMSIZ];
881 #endif
882
883 char *name_colonP;
884 int mask;
885 int isVirtual = 0;
886 int addr_size;
887 int flags = 0;
888
889 // If the interface name is a logical interface then we remove the unit
890 // number so that we have the physical interface (eg: hme0:1 -> hme0).
891 // NetworkInterface currently doesn't have any concept of physical vs.
892 // logical interfaces.
893 strncpy(name, if_name, ifnam_size);
894 name[ifnam_size - 1] = '\0';
895 *vname = 0;
896
897 // Create and populate the netaddr node. If allocation fails
898 // return an un-updated list.
899
900 // Allocate for addr and brdcast at once
901
902 #ifdef AF_INET6
903 addr_size = (family == AF_INET) ? sizeof(struct sockaddr_in)
904 : sizeof(struct sockaddr_in6);
905 #else
906 addr_size = sizeof(struct sockaddr_in);
907 #endif
908
909 CHECKED_MALLOC3(addrP, netaddr *, sizeof(netaddr) + 2 * addr_size);
910 addrP->addr = (struct sockaddr *)((char *)addrP + sizeof(netaddr));
911 memcpy(addrP->addr, ifr_addrP, addr_size);
912
913 addrP->family = family;
914 addrP->brdcast = NULL;
915 addrP->mask = prefix;
916 addrP->next = 0;
917 if (family == AF_INET) {
918 // Deal with broadcast addr & subnet mask
919 if (ifr_broadaddrP != NULL) { // just set it, if already known
920 addrP->brdcast =
921 (struct sockaddr *)((char *)addrP + sizeof(netaddr) + addr_size);
922 memcpy(addrP->brdcast, ifr_broadaddrP, addr_size);
923 } else { // otherwise look it up
924 struct sockaddr *brdcast_to =
925 (struct sockaddr *)((char *)addrP + sizeof(netaddr) + addr_size);
926 addrP->brdcast = getBroadcast(env, sock, name, brdcast_to);
927 if ((*env)->ExceptionCheck(env) == JNI_TRUE) {
928 return ifs;
929 }
930 }
931
932 if (ifr_subnetaddrP != NULL) { // just compute the mask, if already known
933 addrP->mask = computeMaskFromAddress(ifr_subnetaddrP);
934 } else { // otherwise look it up
935 if ((mask = getSubnet(env, sock, name)) != -1) {
936 addrP->mask = mask;
937 } else if((*env)->ExceptionCheck(env)) {
938 return ifs;
939 }
940 }
941 }
942
943 // Deal with virtual interface with colon notation e.g. eth0:1
944 name_colonP = strchr(name, ':');
945 if (name_colonP != NULL) {
946 // This is a virtual interface. If we are able to access the parent
947 // we need to create a new entry if it doesn't exist yet *and* update
948 // the 'parent' interface with the new records.
949 *name_colonP = 0;
950 if (getFlags(sock, name, &flags) < 0 || flags < 0) {
951 // failed to access parent interface do not create parent.
952 // We are a virtual interface with no parent.
953 isVirtual = 1;
954 *name_colonP = ':';
955 } else {
956 // Got access to parent, so create it if necessary.
957 // Save original name to vname and truncate name by ':'
958 memcpy(vname, name, sizeof(vname) );
959 vname[name_colonP - name] = ':';
960 }
961 }
962
963 // Check if this is a "new" interface. Use the interface name for
964 // matching because index isn't supported on Solaris 2.6 & 7.
965 while (currif != NULL) {
966 if (strcmp(name, currif->name) == 0) {
967 break;
968 }
969 currif = currif->next;
970 }
971
972 // If "new" then create an netif structure and insert it into the list.
973 if (currif == NULL) {
974 CHECKED_MALLOC3(currif, netif *, sizeof(netif) + ifnam_size);
975 currif->name = (char *)currif + sizeof(netif);
976 strncpy(currif->name, name, ifnam_size);
977 currif->name[ifnam_size - 1] = '\0';
978 currif->index = getIndex(sock, name);
979 currif->addr = NULL;
980 currif->childs = NULL;
981 currif->virtual = isVirtual;
982 currif->next = ifs;
983 ifs = currif;
984 }
985
986 // Finally insert the address on the interface
987 addrP->next = currif->addr;
988 currif->addr = addrP;
989
990 parent = currif;
991
992 // Deal with the virtual interface now.
993 if (vname[0]) {
994 netaddr *tmpaddr;
995
996 currif = parent->childs;
997
998 while (currif != NULL) {
999 if (strcmp(vname, currif->name) == 0) {
1000 break;
1001 }
1002 currif = currif->next;
1003 }
1004
1005 if (currif == NULL) {
1006 CHECKED_MALLOC3(currif, netif *, sizeof(netif) + ifnam_size);
1007 currif->name = (char *)currif + sizeof(netif);
1008 strncpy(currif->name, vname, ifnam_size);
1009 currif->name[ifnam_size - 1] = '\0';
1010 currif->index = getIndex(sock, vname);
1011 currif->addr = NULL;
1012 // Need to duplicate the addr entry?
1013 currif->virtual = 1;
1014 currif->childs = NULL;
1015 currif->next = parent->childs;
1016 parent->childs = currif;
1017 }
1018
1019 CHECKED_MALLOC3(tmpaddr, netaddr *, sizeof(netaddr) + 2 * addr_size);
1020 memcpy(tmpaddr, addrP, sizeof(netaddr));
1021 if (addrP->addr != NULL) {
1022 tmpaddr->addr = (struct sockaddr *)
1023 ((char*)tmpaddr + sizeof(netaddr));
1024 memcpy(tmpaddr->addr, addrP->addr, addr_size);
1025 }
1026
1027 if (addrP->brdcast != NULL) {
1028 tmpaddr->brdcast = (struct sockaddr *)
1029 ((char *)tmpaddr + sizeof(netaddr) + addr_size);
1030 memcpy(tmpaddr->brdcast, addrP->brdcast, addr_size);
1031 }
1032
1033 tmpaddr->next = currif->addr;
1034 currif->addr = tmpaddr;
1035 }
1036
1037 return ifs;
1038 }
1039
1040 static short computeMaskFromAddress(struct sockaddr *ifr_subnetaddrP) {
1041 short ret = 0;
1042 unsigned int mask;
1043
1044 mask = ntohl(((struct sockaddr_in*)ifr_subnetaddrP)->sin_addr.s_addr);
1045
1046 while (mask) {
1047 mask <<= 1;
1048 ret++;
1049 }
1050
1051 return ret;
1052 }
1053
1054 /*
1055 * Opens a socket for further ioct calls. proto is one of AF_INET or AF_INET6.
1056 */
1057 static int openSocket(JNIEnv *env, int proto) {
1058 int sock;
1059
1060 if ((sock = socket(proto, SOCK_DGRAM, 0)) < 0) {
1061 // If EPROTONOSUPPORT is returned it means we don't have
1062 // support for this proto so don't throw an exception.
1063 if (errno != EPROTONOSUPPORT) {
1064 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1065 "Socket creation failed");
1066 }
1067 return -1;
1068 }
1069
1070 return sock;
1071 }
1072
1073
1074 /** Linux, AIX **/
1075 #if defined(__linux__) || defined(_AIX)
1076
1077 #ifdef AF_INET6
1078 /*
1079 * Opens a socket for further ioct calls. Tries AF_INET socket first and
1080 * if it falls return AF_INET6 socket.
1081 */
1082 // unused arg ifname and struct if2
1083 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
1084 int sock;
1085 struct ifreq if2;
1086
1087 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1088 if (errno == EPROTONOSUPPORT) {
1089 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1090 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1091 "IPV6 Socket creation failed");
1092 return -1;
1093 }
1094 } else { // errno is not NOSUPPORT
1095 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1096 "IPV4 Socket creation failed");
1097 return -1;
1098 }
1099 }
1100
1101 // Linux starting from 2.6.? kernel allows ioctl call with either IPv4 or
1102 // IPv6 socket regardless of type of address of an interface.
1103 return sock;
1104 }
1105
1106 #else
1107 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
1108 return openSocket(env,AF_INET);
1109 }
1110 #endif
1111
1112 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) {
1113 struct ifconf ifc;
1114 struct ifreq *ifreqP;
1115 char *buf = NULL;
1116 int numifs;
1117 unsigned i;
1118 int siocgifconfRequest = SIOCGIFCONF;
1119
1120 #if defined(__linux__)
1121 // need to do a dummy SIOCGIFCONF to determine the buffer size.
1122 // SIOCGIFCOUNT doesn't work
1123 ifc.ifc_buf = NULL;
1124 if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
1125 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1126 "ioctl SIOCGIFCONF failed");
1127 return ifs;
1128 }
1129 #elif defined(_AIX)
1130 ifc.ifc_buf = NULL;
1131 if (ioctl(sock, SIOCGSIZIFCONF, &(ifc.ifc_len)) < 0) {
1132 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1133 "ioctl SIOCGSIZIFCONF failed");
1134 return ifs;
1135 }
1136 #endif /* __linux__ */
1137
1138 CHECKED_MALLOC3(buf, char *, ifc.ifc_len);
1139
1140 ifc.ifc_buf = buf;
1141 #if defined(_AIX)
1142 siocgifconfRequest = CSIOCGIFCONF;
1143 #endif
1144 if (ioctl(sock, siocgifconfRequest, (char *)&ifc) < 0) {
1145 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1146 "ioctl SIOCGIFCONF failed");
1147 free(buf);
1148 return ifs;
1149 }
1150
1151 // Iterate through each interface
1152 ifreqP = ifc.ifc_req;
1153 struct sockaddr addr, broadaddr, netmask;
1154 for (i = 0; i < ifc.ifc_len / sizeof(struct ifreq); i++, ifreqP++) {
1155 struct sockaddr* broadaddrP = NULL;
1156 struct sockaddr* subnetaddrP = NULL;
1157
1158 // Ignore non IPv4 Interfaces
1159 if ((struct sockaddr *)&(ifreqP->ifr_addr) != NULL &&
1160 ((struct sockaddr *)&(ifreqP->ifr_addr))->sa_family != AF_INET) {
1161 continue;
1162 }
1163
1164 memcpy(&addr, &(ifreqP->ifr_addr), sizeof(struct sockaddr));
1165
1166 // set broadaddrP, if applicable
1167 if ((ifreqP->ifr_flags & IFF_POINTOPOINT) == 0 &&
1168 ifreqP->ifr_flags & IFF_BROADCAST) {
1169
1170 if (ioctl(sock, SIOCGIFBRDADDR, ifreqP) == 0) {
1171 memcpy(&broadaddr, &(ifreqP->ifr_broadaddr), sizeof(struct sockaddr));
1172 broadaddrP = &broadaddr;
1173 }
1174 // restore the address, for subsequent calls
1175 memcpy(&(ifreqP->ifr_addr), &addr, sizeof(struct sockaddr));
1176 }
1177
1178 if (ioctl(sock, SIOCGIFNETMASK, ifreqP) == 0) {
1179 #if defined(_AIX)
1180 memcpy(&netmask, &(ifreqP->ifr_addr), sizeof(struct sockaddr));
1181 #else
1182 memcpy(&netmask, &(ifreqP->ifr_netmask), sizeof(struct sockaddr));
1183 #endif
1184 subnetaddrP = &netmask;
1185 }
1186
1187 // Add to the list
1188 ifs = addif(env, sock, ifreqP->ifr_name, ifs,
1189 &addr, broadaddrP, subnetaddrP, AF_INET, 0);
1190
1191 // If an exception occurred then free the list
1192 if ((*env)->ExceptionOccurred(env)) {
1193 free(buf);
1194 freeif(ifs);
1195 return NULL;
1196 }
1197 }
1198
1199 // Free socket and buffer
1200 free(buf);
1201 return ifs;
1202 }
1203
1204
1205 #if defined(AF_INET6) && defined(__linux__)
1206
1207 /*
1208 * Enumerates and returns all IPv6 interfaces on Linux.
1209 */
1210 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1211 FILE *f;
1212 char addr6[40], devname[21];
1213 char addr6p[8][5];
1214 int prefix, scope, dad_status, if_idx;
1215 uint8_t ipv6addr[16];
1216
1217 if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) {
1218 while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n",
1219 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
1220 addr6p[4], addr6p[5], addr6p[6], addr6p[7],
1221 &if_idx, &prefix, &scope, &dad_status, devname) != EOF) {
1222
1223 struct netif *ifs_ptr = NULL;
1224 struct netif *last_ptr = NULL;
1225 struct sockaddr_in6 addr;
1226
1227 sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
1228 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
1229 addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
1230 inet_pton(AF_INET6, addr6, ipv6addr);
1231
1232 memset(&addr, 0, sizeof(struct sockaddr_in6));
1233 memcpy((void*)addr.sin6_addr.s6_addr, (const void*)ipv6addr, 16);
1234
1235 addr.sin6_scope_id = if_idx;
1236
1237 ifs = addif(env, sock, devname, ifs, (struct sockaddr *)&addr,
1238 NULL, NULL, AF_INET6, (short)prefix);
1239
1240 // If an exception occurred then return the list as is.
1241 if ((*env)->ExceptionOccurred(env)) {
1242 fclose(f);
1243 return ifs;
1244 }
1245 }
1246 fclose(f);
1247 }
1248 return ifs;
1249 }
1250 #endif
1251
1252
1253 #if defined(AF_INET6) && defined(_AIX)
1254
1255 /*
1256 * Enumerates and returns all IPv6 interfaces on AIX.
1257 */
1258 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1259 struct ifconf ifc;
1260 struct ifreq *ifreqP;
1261 char *buf;
1262 int numifs;
1263 unsigned i;
1264 unsigned bufsize;
1265 char *cp, *cplimit;
1266
1267 // use SIOCGSIZIFCONF to get size for SIOCGIFCONF
1268
1269 ifc.ifc_buf = NULL;
1270 if (ioctl(sock, SIOCGSIZIFCONF, &(ifc.ifc_len)) < 0) {
1271 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1272 "ioctl SIOCGSIZIFCONF failed");
1273 return ifs;
1274 }
1275 bufsize = ifc.ifc_len;
1276
1277 buf = (char *)malloc(bufsize);
1278 if (!buf) {
1279 JNU_ThrowOutOfMemoryError(env, "Network interface native buffer allocation failed");
1280 return ifs;
1281 }
1282 ifc.ifc_len = bufsize;
1283 ifc.ifc_buf = buf;
1284 if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
1285 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1286 "ioctl CSIOCGIFCONF failed");
1287 free(buf);
1288 return ifs;
1289 }
1290
1291 // Iterate through each interface
1292 ifreqP = ifc.ifc_req;
1293 cp = (char *)ifc.ifc_req;
1294 cplimit = cp + ifc.ifc_len;
1295
1296 for (; cp < cplimit;
1297 cp += (sizeof(ifreqP->ifr_name) +
1298 MAX((ifreqP->ifr_addr).sa_len, sizeof(ifreqP->ifr_addr))))
1299 {
1300 ifreqP = (struct ifreq *)cp;
1301 struct ifreq if2;
1302 memset((char *)&if2, 0, sizeof(if2));
1303 strncpy(if2.ifr_name, ifreqP->ifr_name, sizeof(if2.ifr_name) - 1);
1304
1305 // Skip interface that aren't UP
1306 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) >= 0) {
1307 if (!(if2.ifr_flags & IFF_UP)) {
1308 continue;
1309 }
1310 }
1311
1312 if (ifreqP->ifr_addr.sa_family != AF_INET6)
1313 continue;
1314
1315 if (ioctl(sock, SIOCGIFSITE6, (char *)&if2) >= 0) {
1316 struct sockaddr_in6 *s6= (struct sockaddr_in6 *)&(ifreqP->ifr_addr);
1317 s6->sin6_scope_id = if2.ifr_site6;
1318 }
1319
1320 // Add to the list
1321 ifs = addif(env, sock, ifreqP->ifr_name, ifs,
1322 (struct sockaddr *)&(ifreqP->ifr_addr),
1323 NULL, NULL, AF_INET6, 0);
1324
1325 // If an exception occurred then free the list
1326 if ((*env)->ExceptionOccurred(env)) {
1327 free(buf);
1328 freeif(ifs);
1329 return NULL;
1330 }
1331 }
1332
1333 // Free socket and buffer
1334 free(buf);
1335 return ifs;
1336 }
1337 #endif
1338
1339
1340 static int getIndex(int sock, const char *name) {
1341 // Try to get the interface index
1342 #if defined(_AIX)
1343 return if_nametoindex(name);
1344 #else
1345 struct ifreq if2;
1346 memset((char *)&if2, 0, sizeof(if2));
1347 strncpy(if2.ifr_name, name, sizeof(if2.ifr_name) - 1);
1348
1349 if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) {
1350 return -1;
1351 }
1352
1353 return if2.ifr_ifindex;
1354 #endif
1355 }
1356
1357 /*
1358 * Returns the IPv4 broadcast address of a named interface, if it exists.
1359 * Returns 0 if it doesn't have one.
1360 */
1361 static struct sockaddr *getBroadcast
1362 (JNIEnv *env, int sock, const char *ifname, struct sockaddr *brdcast_store)
1363 {
1364 struct sockaddr *ret = NULL;
1365 struct ifreq if2;
1366 memset((char *)&if2, 0, sizeof(if2));
1367 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
1368
1369 // Let's make sure the interface does have a broadcast address.
1370 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0) {
1371 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1372 "ioctl SIOCGIFFLAGS failed");
1373 return ret;
1374 }
1375
1376 if (if2.ifr_flags & IFF_BROADCAST) {
1377 // It does, let's retrieve it
1378 if (ioctl(sock, SIOCGIFBRDADDR, (char *)&if2) < 0) {
1379 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1380 "ioctl SIOCGIFBRDADDR failed");
1381 return ret;
1382 }
1383
1384 ret = brdcast_store;
1385 memcpy(ret, &if2.ifr_broadaddr, sizeof(struct sockaddr));
1386 }
1387
1388 return ret;
1389 }
1390
1391 /*
1392 * Returns the IPv4 subnet prefix length (aka subnet mask) for the named
1393 * interface, if it has one, otherwise return -1.
1394 */
1395 static short getSubnet(JNIEnv *env, int sock, const char *ifname) {
1396 unsigned int mask;
1397 short ret;
1398 struct ifreq if2;
1399 memset((char *)&if2, 0, sizeof(if2));
1400 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
1401
1402 if (ioctl(sock, SIOCGIFNETMASK, (char *)&if2) < 0) {
1403 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1404 "ioctl SIOCGIFNETMASK failed");
1405 return -1;
1406 }
1407
1408 return computeMaskFromAddress(&(if2.ifr_addr));
1409 }
1410
1411 /*
1412 * Gets the Hardware address (usually MAC address) for the named interface.
1413 * On return puts the data in buf, and returns the length, in byte, of the
1414 * MAC address. Returns -1 if there is no hardware address on that interface.
1415 */
1416 static int getMacAddress
1417 (JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr,
1418 unsigned char *buf)
1419 {
1420 #if defined (_AIX)
1421 int size;
1422 struct kinfo_ndd *nddp;
1423 void *end;
1424
1425 size = getkerninfo(KINFO_NDD, 0, 0, 0);
1426 if (size == 0) {
1427 return -1;
1428 }
1429
1430 if (size < 0) {
1431 perror("getkerninfo 1");
1432 return -1;
1433 }
1434
1435 nddp = (struct kinfo_ndd *)malloc(size);
1436
1437 if (!nddp) {
1438 JNU_ThrowOutOfMemoryError(env,
1439 "Network interface getMacAddress native buffer allocation failed");
1440 return -1;
1441 }
1442
1443 if (getkerninfo(KINFO_NDD, nddp, &size, 0) < 0) {
1444 perror("getkerninfo 2");
1445 return -1;
1446 }
1447
1448 end = (void *)nddp + size;
1449 while ((void *)nddp < end) {
1450 if (!strcmp(nddp->ndd_alias, ifname) ||
1451 !strcmp(nddp->ndd_name, ifname)) {
1452 bcopy(nddp->ndd_addr, buf, 6);
1453 return 6;
1454 } else {
1455 nddp++;
1456 }
1457 }
1458
1459 return -1;
1460 #elif defined(__linux__)
1461 static struct ifreq ifr;
1462 int i;
1463 memset((char *)&ifr, 0, sizeof(ifr));
1464 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1465 if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0) {
1466 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1467 "ioctl SIOCGIFHWADDR failed");
1468 return -1;
1469 }
1470
1471 memcpy(buf, &ifr.ifr_hwaddr.sa_data, IFHWADDRLEN);
1472
1473 // All bytes to 0 means no hardware address.
1474
1475 for (i = 0; i < IFHWADDRLEN; i++) {
1476 if (buf[i] != 0)
1477 return IFHWADDRLEN;
1478 }
1479
1480 return -1;
1481 #endif
1482 }
1483
1484 static int getMTU(JNIEnv *env, int sock, const char *ifname) {
1485 struct ifreq if2;
1486 memset((char *)&if2, 0, sizeof(if2));
1487
1488 if (ifname != NULL) {
1489 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
1490 } else {
1491 JNU_ThrowNullPointerException(env, "network interface name is NULL");
1492 return -1;
1493 }
1494
1495 if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) {
1496 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1497 "ioctl SIOCGIFMTU failed");
1498 return -1;
1499 }
1500
1501 return if2.ifr_mtu;
1502 }
1503
1504 static int getFlags(int sock, const char *ifname, int *flags) {
1505 struct ifreq if2;
1506 memset((char *)&if2, 0, sizeof(if2));
1507 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
1508
1509 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0) {
1510 return -1;
1511 }
1512
1513 if (sizeof(if2.ifr_flags) == sizeof(short)) {
1514 *flags = (if2.ifr_flags & 0xffff);
1515 } else {
1516 *flags = if2.ifr_flags;
1517 }
1518 return 0;
1519 }
1520
1521 #endif /* defined(__linux__) || defined(_AIX) */
1522
1523 /** Solaris **/
1524 #if defined(__solaris__)
1525
1526 /*
1527 * Opens a socket for further ioct calls. Tries AF_INET socket first and
1528 * if it falls return AF_INET6 socket.
1529 */
1530 #ifdef AF_INET6
1531 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
1532 int sock, alreadyV6 = 0;
1533 struct lifreq if2;
1534
1535 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1536 if (errno == EPROTONOSUPPORT) {
1537 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1538 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1539 "IPV6 Socket creation failed");
1540 return -1;
1541 }
1542
1543 alreadyV6=1;
1544 } else { // errno is not NOSUPPORT
1545 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1546 "IPV4 Socket creation failed");
1547 return -1;
1548 }
1549 }
1550
1551
1552 // Solaris requires that we have an IPv6 socket to query an interface
1553 // without an IPv4 address - check it here. POSIX 1 require the kernel to
1554 // return ENOTTY if the call is inappropriate for a device e.g. the NETMASK
1555 // for a device having IPv6 only address but not all devices follow the
1556 // standard so fall back on any error. It's not an ecologically friendly
1557 // gesture but more reliable.
1558
1559 if (!alreadyV6) {
1560 memset((char *)&if2, 0, sizeof(if2));
1561 strncpy(if2.lifr_name, ifname, sizeof(if2.lifr_name) - 1);
1562 if (ioctl(sock, SIOCGLIFNETMASK, (char *)&if2) < 0) {
1563 close(sock);
1564 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1565 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1566 "IPV6 Socket creation failed");
1567 return -1;
1568 }
1569 }
1570 }
1571
1572 return sock;
1573 }
1574
1575 #else
1576 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
1577 return openSocket(env,AF_INET);
1578 }
1579 #endif
1580
1581 /*
1582 * Enumerates and returns all IPv4 interfaces.
1583 */
1584 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) {
1585 return enumIPvXInterfaces(env,sock, ifs, AF_INET);
1586 }
1587
1588 #ifdef AF_INET6
1589 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1590 return enumIPvXInterfaces(env,sock, ifs, AF_INET6);
1591 }
1592 #endif
1593
1594 /*
1595 * Enumerates and returns all interfaces on Solaris.
1596 * Uses the same code for IPv4 and IPv6.
1597 */
1598 static netif *enumIPvXInterfaces(JNIEnv *env, int sock, netif *ifs, int family) {
1599 struct lifconf ifc;
1600 struct lifreq *ifr;
1601 int n;
1602 char *buf;
1603 struct lifnum numifs;
1604 unsigned bufsize;
1605
1606 // Get the interface count
1607 numifs.lifn_family = family;
1608 numifs.lifn_flags = 0;
1609 if (ioctl(sock, SIOCGLIFNUM, (char *)&numifs) < 0) {
1610 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1611 "ioctl SIOCGLIFNUM failed");
1612 return ifs;
1613 }
1614
1615 // Enumerate the interface configurations
1616 bufsize = numifs.lifn_count * sizeof (struct lifreq);
1617 CHECKED_MALLOC3(buf, char *, bufsize);
1618
1619 ifc.lifc_family = family;
1620 ifc.lifc_flags = 0;
1621 ifc.lifc_len = bufsize;
1622 ifc.lifc_buf = buf;
1623 if (ioctl(sock, SIOCGLIFCONF, (char *)&ifc) < 0) {
1624 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1625 "ioctl SIOCGLIFCONF failed");
1626 free(buf);
1627 return ifs;
1628 }
1629
1630 // Iterate through each interface
1631 ifr = ifc.lifc_req;
1632 for (n=0; n<numifs.lifn_count; n++, ifr++) {
1633 int index = -1;
1634 struct lifreq if2;
1635
1636 // Ignore either IPv4 or IPv6 addresses
1637 if (ifr->lifr_addr.ss_family != family) {
1638 continue;
1639 }
1640
1641 #ifdef AF_INET6
1642 if (ifr->lifr_addr.ss_family == AF_INET6) {
1643 struct sockaddr_in6 *s6= (struct sockaddr_in6 *)&(ifr->lifr_addr);
1644 s6->sin6_scope_id = getIndex(sock, ifr->lifr_name);
1645 }
1646 #endif
1647
1648 // add to the list
1649 ifs = addif(env, sock,ifr->lifr_name, ifs,
1650 (struct sockaddr *)&(ifr->lifr_addr),
1651 NULL, NULL, family, (short)ifr->lifr_addrlen);
1652
1653 // If an exception occurred we return immediately
1654 if ((*env)->ExceptionOccurred(env)) {
1655 free(buf);
1656 return ifs;
1657 }
1658
1659 }
1660
1661 free(buf);
1662 return ifs;
1663 }
1664
1665 static int getIndex(int sock, const char *name) {
1666 // Try to get the interface index. (Not supported on Solaris 2.6 or 7)
1667 struct lifreq if2;
1668 memset((char *)&if2, 0, sizeof(if2));
1669 strncpy(if2.lifr_name, name, sizeof(if2.lifr_name) - 1);
1670
1671 if (ioctl(sock, SIOCGLIFINDEX, (char *)&if2) < 0) {
1672 return -1;
1673 }
1674
1675 return if2.lifr_index;
1676 }
1677
1678 /*
1679 * Returns the IPv4 broadcast address of a named interface, if it exists.
1680 * Returns 0 if it doesn't have one.
1681 */
1682 static struct sockaddr *getBroadcast
1683 (JNIEnv *env, int sock, const char *ifname, struct sockaddr *brdcast_store)
1684 {
1685 struct sockaddr *ret = NULL;
1686 struct lifreq if2;
1687 memset((char *)&if2, 0, sizeof(if2));
1688 strncpy(if2.lifr_name, ifname, sizeof(if2.lifr_name) - 1);
1689
1690 // Let's make sure the interface does have a broadcast address
1691 if (ioctl(sock, SIOCGLIFFLAGS, (char *)&if2) < 0) {
1692 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1693 "ioctl SIOCGLIFFLAGS failed");
1694 return ret;
1695 }
1696
1697 if (if2.lifr_flags & IFF_BROADCAST) {
1698 // It does, let's retrieve it
1699 if (ioctl(sock, SIOCGLIFBRDADDR, (char *)&if2) < 0) {
1700 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1701 "ioctl SIOCGLIFBRDADDR failed");
1702 return ret;
1703 }
1704
1705 ret = brdcast_store;
1706 memcpy(ret, &if2.lifr_broadaddr, sizeof(struct sockaddr));
1707 }
1708
1709 return ret;
1710 }
1711
1712 /*
1713 * Returns the IPv4 subnet prefix length (aka subnet mask) for the named
1714 * interface, if it has one, otherwise return -1.
1715 */
1716 static short getSubnet(JNIEnv *env, int sock, const char *ifname) {
1717 unsigned int mask;
1718 short ret;
1719 struct lifreq if2;
1720 memset((char *)&if2, 0, sizeof(if2));
1721 strncpy(if2.lifr_name, ifname, sizeof(if2.lifr_name) - 1);
1722
1723 if (ioctl(sock, SIOCGLIFNETMASK, (char *)&if2) < 0) {
1724 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1725 "ioctl SIOCGLIFNETMASK failed");
1726 return -1;
1727 }
1728
1729 return computeMaskFromAddress(&(if2.lifr_addr));
1730 }
1731
1732
1733 #define DEV_PREFIX "/dev/"
1734
1735 /*
1736 * Solaris specific DLPI code to get hardware address from a device.
1737 * Unfortunately, at least up to Solaris X, you have to have special
1738 * privileges (i.e. be root).
1739 */
1740 static int getMacFromDevice
1741 (JNIEnv *env, const char* ifname, unsigned char* retbuf)
1742 {
1743 char style1dev[MAXPATHLEN];
1744 int fd;
1745 dl_phys_addr_req_t dlpareq;
1746 dl_phys_addr_ack_t *dlpaack;
1747 struct strbuf msg;
1748 char buf[128];
1749 int flags = 0;
1750
1751 // Device is in /dev. e.g.: /dev/bge0
1752 strcpy(style1dev, DEV_PREFIX);
1753 strcat(style1dev, ifname);
1754 if ((fd = open(style1dev, O_RDWR)) < 0) {
1755 // Can't open it. We probably are missing the privilege.
1756 // We'll have to try something else
1757 return 0;
1758 }
1759
1760 dlpareq.dl_primitive = DL_PHYS_ADDR_REQ;
1761 dlpareq.dl_addr_type = DL_CURR_PHYS_ADDR;
1762
1763 msg.buf = (char *)&dlpareq;
1764 msg.len = DL_PHYS_ADDR_REQ_SIZE;
1765
1766 if (putmsg(fd, &msg, NULL, 0) < 0) {
1767 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1768 "putmsg failed");
1769 return -1;
1770 }
1771
1772 dlpaack = (dl_phys_addr_ack_t *)buf;
1773
1774 msg.buf = (char *)buf;
1775 msg.len = 0;
1776 msg.maxlen = sizeof (buf);
1777 if (getmsg(fd, &msg, NULL, &flags) < 0) {
1778 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1779 "getmsg failed");
1780 return -1;
1781 }
1782
1783 if (msg.len < DL_PHYS_ADDR_ACK_SIZE || dlpaack->dl_primitive != DL_PHYS_ADDR_ACK) {
1784 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
1785 "Couldn't obtain phys addr\n");
1786 return -1;
1787 }
1788
1789 memcpy(retbuf, &buf[dlpaack->dl_addr_offset], dlpaack->dl_addr_length);
1790 return dlpaack->dl_addr_length;
1791 }
1792
1793 /*
1794 * Gets the Hardware address (usually MAC address) for the named interface.
1795 * On return puts the data in buf, and returns the length, in byte, of the
1796 * MAC address. Returns -1 if there is no hardware address on that interface.
1797 */
1798 static int getMacAddress
1799 (JNIEnv *env, int sock, const char *ifname, const struct in_addr* addr,
1800 unsigned char *buf)
1801 {
1802 struct arpreq arpreq;
1803 struct sockaddr_in* sin;
1804 struct sockaddr_in ipAddr;
1805 int len, i;
1806 struct lifreq lif;
1807
1808 // First, try the new (S11) SIOCGLIFHWADDR ioctl(). If that fails
1809 // try the old way.
1810 memset(&lif, 0, sizeof(lif));
1811 strlcpy(lif.lifr_name, ifname, sizeof(lif.lifr_name));
1812
1813 if (ioctl(sock, SIOCGLIFHWADDR, &lif) != -1) {
1814 struct sockaddr_dl *sp;
1815 sp = (struct sockaddr_dl *)&lif.lifr_addr;
1816 memcpy(buf, &sp->sdl_data[0], sp->sdl_alen);
1817 return sp->sdl_alen;
1818 }
1819
1820 // On Solaris we have to use DLPI, but it will only work if we have
1821 // privileged access (i.e. root). If that fails, we try a lookup
1822 // in the ARP table, which requires an IPv4 address.
1823 if ((len = getMacFromDevice(env, ifname, buf)) == 0) {
1824 // DLPI failed - trying to do arp lookup
1825
1826 if (addr == NULL) {
1827 // No IPv4 address for that interface, so can't do an ARP lookup.
1828 return -1;
1829 }
1830
1831 len = 6; //???
1832
1833 sin = (struct sockaddr_in *) &arpreq.arp_pa;
1834 memset((char *) &arpreq, 0, sizeof(struct arpreq));
1835 ipAddr.sin_port = 0;
1836 ipAddr.sin_family = AF_INET;
1837 memcpy(&ipAddr.sin_addr, addr, sizeof(struct in_addr));
1838 memcpy(&arpreq.arp_pa, &ipAddr, sizeof(struct sockaddr_in));
1839 arpreq.arp_flags= ATF_PUBL;
1840
1841 if (ioctl(sock, SIOCGARP, &arpreq) < 0) {
1842 return -1;
1843 }
1844
1845 memcpy(buf, &arpreq.arp_ha.sa_data[0], len );
1846 }
1847
1848 // All bytes to 0 means no hardware address.
1849 for (i = 0; i < len; i++) {
1850 if (buf[i] != 0)
1851 return len;
1852 }
1853
1854 return -1;
1855 }
1856
1857 static int getMTU(JNIEnv *env, int sock, const char *ifname) {
1858 struct lifreq if2;
1859 memset((char *)&if2, 0, sizeof(if2));
1860 strncpy(if2.lifr_name, ifname, sizeof(if2.lifr_name) - 1);
1861
1862 if (ioctl(sock, SIOCGLIFMTU, (char *)&if2) < 0) {
1863 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1864 "ioctl SIOCGLIFMTU failed");
1865 return -1;
1866 }
1867
1868 return if2.lifr_mtu;
1869 }
1870
1871 static int getFlags(int sock, const char *ifname, int *flags) {
1872 struct lifreq if2;
1873 memset((char *)&if2, 0, sizeof(if2));
1874 strncpy(if2.lifr_name, ifname, sizeof(if2.lifr_name) - 1);
1875
1876 if (ioctl(sock, SIOCGLIFFLAGS, (char *)&if2) < 0) {
1877 return -1;
1878 }
1879
1880 *flags = if2.lifr_flags;
1881 return 0;
1882 }
1883
1884
1885 #endif /* __solaris__ */
1886
1887
1888 /** BSD **/
1889 #ifdef _ALLBSD_SOURCE
1890
1891 /*
1892 * Opens a socket for further ioct calls. Tries AF_INET socket first and
1893 * if it falls return AF_INET6 socket.
1894 */
1895 #ifdef AF_INET6
1896 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
1897 int sock;
1898 struct ifreq if2;
1899
1900 if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1901 if (errno == EPROTONOSUPPORT) {
1902 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1903 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1904 "IPV6 Socket creation failed");
1905 return -1;
1906 }
1907 } else { // errno is not NOSUPPORT
1908 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1909 "IPV4 Socket creation failed");
1910 return -1;
1911 }
1912 }
1913
1914 return sock;
1915 }
1916
1917 #else
1918 static int openSocketWithFallback(JNIEnv *env, const char *ifname) {
1919 return openSocket(env,AF_INET);
1920 }
1921 #endif
1922
1923 /*
1924 * Enumerates and returns all IPv4 interfaces.
1925 */
1926 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) {
1927 struct ifaddrs *ifa, *origifa;
1928
1929 if (getifaddrs(&origifa) != 0) {
1930 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
1931 "getifaddrs() function failed");
1932 return ifs;
1933 }
1934
1935 for (ifa = origifa; ifa != NULL; ifa = ifa->ifa_next) {
1936 struct sockaddr* ifa_broadaddr = NULL;
1937
1938 // Skip non-AF_INET entries.
1939 if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET)
1940 continue;
1941
1942 // set ifa_broadaddr, if there is one
1943 if ((ifa->ifa_flags & IFF_POINTOPOINT) == 0 &&
1944 ifa->ifa_flags & IFF_BROADCAST) {
1945 ifa_broadaddr = ifa->ifa_broadaddr;
1946 }
1947
1948 // Add to the list.
1949 ifs = addif(env, sock, ifa->ifa_name, ifs, ifa->ifa_addr,
1950 ifa_broadaddr, ifa->ifa_netmask, AF_INET, 0);
1951
1952 // If an exception occurred then free the list.
1953 if ((*env)->ExceptionOccurred(env)) {
1954 freeifaddrs(origifa);
1955 freeif(ifs);
1956 return NULL;
1957 }
1958 }
1959
1960 // Free socket and buffer
1961 freeifaddrs(origifa);
1962 return ifs;
1963 }
1964
1965 #ifdef AF_INET6
1966 /*
1967 * Determines the prefix on BSD for IPv6 interfaces.
1968 */
1969 static int prefix(void *val, int size) {
1970 u_char *name = (u_char *)val;
1971 int byte, bit, prefix = 0;
1972
1973 for (byte = 0; byte < size; byte++, prefix += 8)
1974 if (name[byte] != 0xff)
1975 break;
1976 if (byte == size)
1977 return prefix;
1978 for (bit = 7; bit != 0; bit--, prefix++)
1979 if (!(name[byte] & (1 << bit)))
1980 break;
1981 for (; bit != 0; bit--)
1982 if (name[byte] & (1 << bit))
1983 return (0);
1984 byte++;
1985 for (; byte < size; byte++)
1986 if (name[byte])
1987 return (0);
1988 return prefix;
1989 }
1990
1991 /*
1992 * Enumerates and returns all IPv6 interfaces on BSD.
1993 */
1994 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) {
1995 struct ifaddrs *ifa, *origifa;
1996 struct sockaddr_in6 *sin6;
1997 struct in6_ifreq ifr6;
1998
1999 if (getifaddrs(&origifa) != 0) {
2000 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
2001 "getifaddrs() function failed");
2002 return ifs;
2003 }
2004
2005 for (ifa = origifa; ifa != NULL; ifa = ifa->ifa_next) {
2006
2007 // Skip non-AF_INET6 entries.
2008 if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET6)
2009 continue;
2010
2011 memset(&ifr6, 0, sizeof(ifr6));
2012 strlcpy(ifr6.ifr_name, ifa->ifa_name, sizeof(ifr6.ifr_name));
2013 memcpy(&ifr6.ifr_addr, ifa->ifa_addr,
2014 MIN(sizeof(ifr6.ifr_addr), ifa->ifa_addr->sa_len));
2015
2016 if (ioctl(sock, SIOCGIFNETMASK_IN6, (caddr_t)&ifr6) < 0) {
2017 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
2018 "ioctl SIOCGIFNETMASK_IN6 failed");
2019 freeifaddrs(origifa);
2020 freeif(ifs);
2021 return NULL;
2022 }
2023
2024 // Add to the list.
2025 sin6 = (struct sockaddr_in6 *)&ifr6.ifr_addr;
2026 ifs = addif(env, sock, ifa->ifa_name, ifs, ifa->ifa_addr, NULL, NULL,
2027 AF_INET6,
2028 (short)prefix(&sin6->sin6_addr, sizeof(struct in6_addr)));
2029
2030 // If an exception occurred then free the list.
2031 if ((*env)->ExceptionOccurred(env)) {
2032 freeifaddrs(origifa);
2033 freeif(ifs);
2034 return NULL;
2035 }
2036 }
2037
2038 // Free socket and ifaddrs buffer
2039 freeifaddrs(origifa);
2040 return ifs;
2041 }
2042 #endif
2043
2044 static int getIndex(int sock, const char *name) {
2045 #ifdef __FreeBSD__
2046 // Try to get the interface index
2047 // (Not supported on Solaris 2.6 or 7)
2048 struct ifreq if2;
2049 memset((char *)&if2, 0, sizeof(if2));
2050 strncpy(if2.ifr_name, name, sizeof(if2.ifr_name) - 1);
2051
2052 if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) {
2053 return -1;
2054 }
2055
2056 return if2.ifr_index;
2057 #else
2058 // Try to get the interface index using BSD specific if_nametoindex
2059 int index = if_nametoindex(name);
2060 return (index == 0) ? -1 : index;
2061 #endif
2062 }
2063
2064 /*
2065 * Returns the IPv4 broadcast address of a named interface, if it exists.
2066 * Returns 0 if it doesn't have one.
2067 */
2068 static struct sockaddr *getBroadcast
2069 (JNIEnv *env, int sock, const char *ifname, struct sockaddr *brdcast_store)
2070 {
2071 struct sockaddr *ret = NULL;
2072 struct ifreq if2;
2073 memset((char *)&if2, 0, sizeof(if2));
2074 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
2075
2076 // Make sure the interface does have a broadcast address
2077 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0) {
2078 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
2079 "ioctl SIOCGIFFLAGS failed");
2080 return ret;
2081 }
2082
2083 if (if2.ifr_flags & IFF_BROADCAST) {
2084 // It does, let's retrieve it
2085 if (ioctl(sock, SIOCGIFBRDADDR, (char *)&if2) < 0) {
2086 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
2087 "ioctl SIOCGIFBRDADDR failed");
2088 return ret;
2089 }
2090
2091 ret = brdcast_store;
2092 memcpy(ret, &if2.ifr_broadaddr, sizeof(struct sockaddr));
2093 }
2094
2095 return ret;
2096 }
2097
2098 /*
2099 * Returns the IPv4 subnet prefix length (aka subnet mask) for the named
2100 * interface, if it has one, otherwise return -1.
2101 */
2102 static short getSubnet(JNIEnv *env, int sock, const char *ifname) {
2103 unsigned int mask;
2104 short ret;
2105 struct ifreq if2;
2106 memset((char *)&if2, 0, sizeof(if2));
2107 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
2108
2109 if (ioctl(sock, SIOCGIFNETMASK, (char *)&if2) < 0) {
2110 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
2111 "ioctl SIOCGIFNETMASK failed");
2112 return -1;
2113 }
2114
2115 return computeMaskFromAddress(&(if2.ifr_addr));
2116 }
2117
2118 /*
2119 * Gets the Hardware address (usually MAC address) for the named interface.
2120 * return puts the data in buf, and returns the length, in byte, of the
2121 * MAC address. Returns -1 if there is no hardware address on that interface.
2122 */
2123 static int getMacAddress
2124 (JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr,
2125 unsigned char *buf)
2126 {
2127 struct ifaddrs *ifa0, *ifa;
2128 struct sockaddr *saddr;
2129 int i;
2130
2131 // Grab the interface list
2132 if (!getifaddrs(&ifa0)) {
2133 // Cycle through the interfaces
2134 for (i = 0, ifa = ifa0; ifa != NULL; ifa = ifa->ifa_next, i++) {
2135 saddr = ifa->ifa_addr;
2136 // Link layer contains the MAC address
2137 if (saddr->sa_family == AF_LINK && !strcmp(ifname, ifa->ifa_name)) {
2138 struct sockaddr_dl *sadl = (struct sockaddr_dl *) saddr;
2139 // Check the address is the correct length
2140 if (sadl->sdl_alen == ETHER_ADDR_LEN) {
2141 memcpy(buf, (sadl->sdl_data + sadl->sdl_nlen), ETHER_ADDR_LEN);
2142 freeifaddrs(ifa0);
2143 return ETHER_ADDR_LEN;
2144 }
2145 }
2146 }
2147 freeifaddrs(ifa0);
2148 }
2149
2150 return -1;
2151 }
2152
2153 static int getMTU(JNIEnv *env, int sock, const char *ifname) {
2154 struct ifreq if2;
2155 memset((char *)&if2, 0, sizeof(if2));
2156 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
2157
2158 if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) {
2159 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
2160 "ioctl SIOCGIFMTU failed");
2161 return -1;
2162 }
2163
2164 return if2.ifr_mtu;
2165 }
2166
2167 static int getFlags(int sock, const char *ifname, int *flags) {
2168 struct ifreq if2;
2169 int ret = -1;
2170 memset((char *)&if2, 0, sizeof(if2));
2171 strncpy(if2.ifr_name, ifname, sizeof(if2.ifr_name) - 1);
2172
2173 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0) {
2174 return -1;
2175 }
2176
2177 if (sizeof(if2.ifr_flags) == sizeof(short)) {
2178 *flags = (if2.ifr_flags & 0xffff);
2179 } else {
2180 *flags = if2.ifr_flags;
2181 }
2182 return 0;
2183 }
2184 #endif /* __ALLBSD_SOURCE__ */