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