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