1 /* 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 27 #include <errno.h> 28 #include <strings.h> 29 #if defined(_ALLBSD_SOURCE) && defined(__OpenBSD__) 30 #include <sys/types.h> 31 #endif 32 #include <netinet/in.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 #include <arpa/inet.h> 38 #include <net/if.h> 39 #include <net/if_arp.h> 40 41 #ifdef __solaris__ 42 #include <sys/dlpi.h> 43 #include <fcntl.h> 44 #include <stropts.h> 45 #include <sys/sockio.h> 46 #endif 47 48 #ifdef __linux__ 49 #include <sys/ioctl.h> 50 #include <bits/ioctls.h> 51 #include <sys/utsname.h> 52 #include <stdio.h> 53 #endif 54 55 #if defined(_AIX) 56 #include <sys/ioctl.h> 57 #include <netinet/in6_var.h> 58 #include <sys/ndd_var.h> 59 #include <sys/kinfo.h> 60 #endif 61 62 #ifdef __linux__ 63 #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6" 64 #endif 65 66 #if defined(_ALLBSD_SOURCE) 67 #include <sys/param.h> 68 #include <sys/ioctl.h> 69 #include <sys/sockio.h> 70 #if defined(__APPLE__) 71 #include <net/ethernet.h> 72 #include <net/if_var.h> 73 #include <net/if_dl.h> 74 #include <netinet/in_var.h> 75 #include <ifaddrs.h> 76 #endif 77 #endif 78 79 #include "jvm.h" 80 #include "jni_util.h" 81 #include "net_util.h" 82 83 typedef struct _netaddr { 84 struct sockaddr *addr; 85 struct sockaddr *brdcast; 86 short mask; 87 int family; /* to make searches simple */ 88 struct _netaddr *next; 89 } netaddr; 90 91 typedef struct _netif { 92 char *name; 93 int index; 94 char virtual; 95 netaddr *addr; 96 struct _netif *childs; 97 struct _netif *next; 98 } netif; 99 100 /************************************************************************ 101 * NetworkInterface 102 */ 103 104 #include "java_net_NetworkInterface.h" 105 106 /************************************************************************ 107 * NetworkInterface 108 */ 109 jclass ni_class; 110 jfieldID ni_nameID; 111 jfieldID ni_indexID; 112 jfieldID ni_descID; 113 jfieldID ni_addrsID; 114 jfieldID ni_bindsID; 115 jfieldID ni_virutalID; 116 jfieldID ni_childsID; 117 jfieldID ni_parentID; 118 jfieldID ni_defaultIndexID; 119 jmethodID ni_ctrID; 120 121 static jclass ni_iacls; 122 static jclass ni_ia4cls; 123 static jclass ni_ia6cls; 124 static jclass ni_ibcls; 125 static jmethodID ni_ia4ctrID; 126 static jmethodID ni_ia6ctrID; 127 static jmethodID ni_ibctrID; 128 static jfieldID ni_ibaddressID; 129 static jfieldID ni_ib4broadcastID; 130 static jfieldID ni_ib4maskID; 131 132 /** Private methods declarations **/ 133 static jobject createNetworkInterface(JNIEnv *env, netif *ifs); 134 static int getFlags0(JNIEnv *env, jstring ifname); 135 136 static netif *enumInterfaces(JNIEnv *env); 137 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs); 138 139 #ifdef AF_INET6 140 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs); 141 #endif 142 143 static netif *addif(JNIEnv *env, int sock, const char * if_name, netif *ifs, struct sockaddr* ifr_addrP, int family, short prefix); 144 static void freeif(netif *ifs); 145 146 static int openSocket(JNIEnv *env, int proto); 147 static int openSocketWithFallback(JNIEnv *env, const char *ifname); 148 149 150 static struct sockaddr *getBroadcast(JNIEnv *env, int sock, const char *name, struct sockaddr *brdcast_store); 151 static short getSubnet(JNIEnv *env, int sock, const char *ifname); 152 static int getIndex(int sock, const char *ifname); 153 154 static int getFlags(int sock, const char *ifname, int *flags); 155 static int getMacAddress(JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr, unsigned char *buf); 156 static int getMTU(JNIEnv *env, int sock, const char *ifname); 157 158 159 160 #ifdef __solaris__ 161 static netif *enumIPvXInterfaces(JNIEnv *env, int sock, netif *ifs, int family); 162 static int getMacFromDevice(JNIEnv *env, const char* ifname, unsigned char* retbuf); 163 164 #ifndef SIOCGLIFHWADDR 165 #define SIOCGLIFHWADDR _IOWR('i', 192, struct lifreq) 166 #endif 167 168 #endif 169 170 /******************* Java entry points *****************************/ 171 172 /* 173 * Class: java_net_NetworkInterface 174 * Method: init 175 * Signature: ()V 176 */ 177 JNIEXPORT void JNICALL 178 Java_java_net_NetworkInterface_init(JNIEnv *env, jclass cls) { 179 ni_class = (*env)->FindClass(env,"java/net/NetworkInterface"); 180 CHECK_NULL(ni_class); 181 ni_class = (*env)->NewGlobalRef(env, ni_class); 182 CHECK_NULL(ni_class); 183 ni_nameID = (*env)->GetFieldID(env, ni_class,"name", "Ljava/lang/String;"); 184 CHECK_NULL(ni_nameID); 185 ni_indexID = (*env)->GetFieldID(env, ni_class, "index", "I"); 186 CHECK_NULL(ni_indexID); 187 ni_addrsID = (*env)->GetFieldID(env, ni_class, "addrs", "[Ljava/net/InetAddress;"); 188 CHECK_NULL(ni_addrsID); 189 ni_bindsID = (*env)->GetFieldID(env, ni_class, "bindings", "[Ljava/net/InterfaceAddress;"); 190 CHECK_NULL(ni_bindsID); 191 ni_descID = (*env)->GetFieldID(env, ni_class, "displayName", "Ljava/lang/String;"); 192 CHECK_NULL(ni_descID); 193 ni_virutalID = (*env)->GetFieldID(env, ni_class, "virtual", "Z"); 194 CHECK_NULL(ni_virutalID); 195 ni_childsID = (*env)->GetFieldID(env, ni_class, "childs", "[Ljava/net/NetworkInterface;"); 196 CHECK_NULL(ni_childsID); 197 ni_parentID = (*env)->GetFieldID(env, ni_class, "parent", "Ljava/net/NetworkInterface;"); 198 CHECK_NULL(ni_parentID); 199 ni_ctrID = (*env)->GetMethodID(env, ni_class, "<init>", "()V"); 200 CHECK_NULL(ni_ctrID); 201 202 ni_iacls = (*env)->FindClass(env, "java/net/InetAddress"); 203 CHECK_NULL(ni_iacls); 204 ni_iacls = (*env)->NewGlobalRef(env, ni_iacls); 205 CHECK_NULL(ni_iacls); 206 ni_ia4cls = (*env)->FindClass(env, "java/net/Inet4Address"); 207 CHECK_NULL(ni_ia4cls); 208 ni_ia4cls = (*env)->NewGlobalRef(env, ni_ia4cls); 209 CHECK_NULL(ni_ia4cls); 210 ni_ia6cls = (*env)->FindClass(env, "java/net/Inet6Address"); 211 CHECK_NULL(ni_ia6cls); 212 ni_ia6cls = (*env)->NewGlobalRef(env, ni_ia6cls); 213 CHECK_NULL(ni_ia6cls); 214 ni_ibcls = (*env)->FindClass(env, "java/net/InterfaceAddress"); 215 CHECK_NULL(ni_ibcls); 216 ni_ibcls = (*env)->NewGlobalRef(env, ni_ibcls); 217 CHECK_NULL(ni_ibcls); 218 ni_ia4ctrID = (*env)->GetMethodID(env, ni_ia4cls, "<init>", "()V"); 219 CHECK_NULL(ni_ia4ctrID); 220 ni_ia6ctrID = (*env)->GetMethodID(env, ni_ia6cls, "<init>", "()V"); 221 CHECK_NULL(ni_ia6ctrID); 222 ni_ibctrID = (*env)->GetMethodID(env, ni_ibcls, "<init>", "()V"); 223 CHECK_NULL(ni_ibctrID); 224 ni_ibaddressID = (*env)->GetFieldID(env, ni_ibcls, "address", "Ljava/net/InetAddress;"); 225 CHECK_NULL(ni_ibaddressID); 226 ni_ib4broadcastID = (*env)->GetFieldID(env, ni_ibcls, "broadcast", "Ljava/net/Inet4Address;"); 227 CHECK_NULL(ni_ib4broadcastID); 228 ni_ib4maskID = (*env)->GetFieldID(env, ni_ibcls, "maskLength", "S"); 229 CHECK_NULL(ni_ib4maskID); 230 ni_defaultIndexID = (*env)->GetStaticFieldID(env, ni_class, "defaultIndex", "I"); 231 } 232 233 234 /* 235 * Class: java_net_NetworkInterface 236 * Method: getByName0 237 * Signature: (Ljava/lang/String;)Ljava/net/NetworkInterface; 238 */ 239 JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByName0 240 (JNIEnv *env, jclass cls, jstring name) { 241 242 netif *ifs, *curr; 243 jboolean isCopy; 244 const char* name_utf; 245 jobject obj = NULL; 246 247 ifs = enumInterfaces(env); 248 if (ifs == NULL) { 249 return NULL; 250 } 251 252 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy); 253 254 /* 255 * Search the list of interface based on name 256 */ 257 curr = ifs; 258 while (curr != NULL) { 259 if (strcmp(name_utf, curr->name) == 0) { 260 break; 261 } 262 curr = curr->next; 263 } 264 265 /* if found create a NetworkInterface */ 266 if (curr != NULL) {; 267 obj = createNetworkInterface(env, curr); 268 } 269 270 /* release the UTF string and interface list */ 271 (*env)->ReleaseStringUTFChars(env, name, name_utf); 272 freeif(ifs); 273 274 return obj; 275 } 276 277 278 /* 279 * Class: java_net_NetworkInterface 280 * Method: getByIndex0 281 * Signature: (Ljava/lang/String;)Ljava/net/NetworkInterface; 282 */ 283 JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByIndex0 284 (JNIEnv *env, jclass cls, jint index) { 285 286 netif *ifs, *curr; 287 jobject obj = NULL; 288 289 if (index <= 0) { 290 return NULL; 291 } 292 293 ifs = enumInterfaces(env); 294 if (ifs == NULL) { 295 return NULL; 296 } 297 298 /* 299 * Search the list of interface based on index 300 */ 301 curr = ifs; 302 while (curr != NULL) { 303 if (index == curr->index) { 304 break; 305 } 306 curr = curr->next; 307 } 308 309 /* if found create a NetworkInterface */ 310 if (curr != NULL) {; 311 obj = createNetworkInterface(env, curr); 312 } 313 314 freeif(ifs); 315 return obj; 316 } 317 318 /* 319 * Class: java_net_NetworkInterface 320 * Method: getByInetAddress0 321 * Signature: (Ljava/net/InetAddress;)Ljava/net/NetworkInterface; 322 */ 323 JNIEXPORT jobject JNICALL Java_java_net_NetworkInterface_getByInetAddress0 324 (JNIEnv *env, jclass cls, jobject iaObj) { 325 326 netif *ifs, *curr; 327 328 #ifdef AF_INET6 329 int family = (getInetAddress_family(env, iaObj) == IPv4) ? AF_INET : AF_INET6; 330 #else 331 int family = AF_INET; 332 #endif 333 334 jobject obj = NULL; 335 jboolean match = JNI_FALSE; 336 337 ifs = enumInterfaces(env); 338 if (ifs == NULL) { 339 return NULL; 340 } 341 342 curr = ifs; 343 while (curr != NULL) { 344 netaddr *addrP = curr->addr; 345 346 /* 347 * Iterate through each address on the interface 348 */ 349 while (addrP != NULL) { 350 351 if (family == addrP->family) { 352 if (family == AF_INET) { 353 int address1 = htonl(((struct sockaddr_in*)addrP->addr)->sin_addr.s_addr); 354 int address2 = getInetAddress_addr(env, iaObj); 355 356 if (address1 == address2) { 357 match = JNI_TRUE; 358 break; 359 } 360 } 361 362 #ifdef AF_INET6 363 if (family == AF_INET6) { 364 jbyte *bytes = (jbyte *)&(((struct sockaddr_in6*)addrP->addr)->sin6_addr); 365 jbyte caddr[16]; 366 int i; 367 getInet6Address_ipaddress(env, iaObj, (char *)caddr); 368 i = 0; 369 while (i < 16) { 370 if (caddr[i] != bytes[i]) { 371 break; 372 } 373 i++; 374 } 375 if (i >= 16) { 376 match = JNI_TRUE; 377 break; 378 } 379 } 380 #endif 381 382 } 383 384 if (match) { 385 break; 386 } 387 addrP = addrP->next; 388 } 389 390 if (match) { 391 break; 392 } 393 curr = curr->next; 394 } 395 396 /* if found create a NetworkInterface */ 397 if (match) {; 398 obj = createNetworkInterface(env, curr); 399 } 400 401 freeif(ifs); 402 return obj; 403 } 404 405 406 /* 407 * Class: java_net_NetworkInterface 408 * Method: getAll 409 * Signature: ()[Ljava/net/NetworkInterface; 410 */ 411 JNIEXPORT jobjectArray JNICALL Java_java_net_NetworkInterface_getAll 412 (JNIEnv *env, jclass cls) { 413 414 netif *ifs, *curr; 415 jobjectArray netIFArr; 416 jint arr_index, ifCount; 417 418 ifs = enumInterfaces(env); 419 if (ifs == NULL) { 420 return NULL; 421 } 422 423 /* count the interface */ 424 ifCount = 0; 425 curr = ifs; 426 while (curr != NULL) { 427 ifCount++; 428 curr = curr->next; 429 } 430 431 /* allocate a NetworkInterface array */ 432 netIFArr = (*env)->NewObjectArray(env, ifCount, cls, NULL); 433 if (netIFArr == NULL) { 434 freeif(ifs); 435 return NULL; 436 } 437 438 /* 439 * Iterate through the interfaces, create a NetworkInterface instance 440 * for each array element and populate the object. 441 */ 442 curr = ifs; 443 arr_index = 0; 444 while (curr != NULL) { 445 jobject netifObj; 446 447 netifObj = createNetworkInterface(env, curr); 448 if (netifObj == NULL) { 449 freeif(ifs); 450 return NULL; 451 } 452 453 /* put the NetworkInterface into the array */ 454 (*env)->SetObjectArrayElement(env, netIFArr, arr_index++, netifObj); 455 456 curr = curr->next; 457 } 458 459 freeif(ifs); 460 return netIFArr; 461 } 462 463 464 /* 465 * Class: java_net_NetworkInterface 466 * Method: isUp0 467 * Signature: (Ljava/lang/String;I)Z 468 */ 469 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isUp0(JNIEnv *env, jclass cls, jstring name, jint index) { 470 int ret = getFlags0(env, name); 471 return ((ret & IFF_UP) && (ret & IFF_RUNNING)) ? JNI_TRUE : JNI_FALSE; 472 } 473 474 /* 475 * Class: java_net_NetworkInterface 476 * Method: isP2P0 477 * Signature: (Ljava/lang/String;I)Z 478 */ 479 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isP2P0(JNIEnv *env, jclass cls, jstring name, jint index) { 480 int ret = getFlags0(env, name); 481 return (ret & IFF_POINTOPOINT) ? JNI_TRUE : JNI_FALSE; 482 } 483 484 /* 485 * Class: java_net_NetworkInterface 486 * Method: isLoopback0 487 * Signature: (Ljava/lang/String;I)Z 488 */ 489 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_isLoopback0(JNIEnv *env, jclass cls, jstring name, jint index) { 490 int ret = getFlags0(env, name); 491 return (ret & IFF_LOOPBACK) ? JNI_TRUE : JNI_FALSE; 492 } 493 494 /* 495 * Class: java_net_NetworkInterface 496 * Method: supportsMulticast0 497 * Signature: (Ljava/lang/String;I)Z 498 */ 499 JNIEXPORT jboolean JNICALL Java_java_net_NetworkInterface_supportsMulticast0(JNIEnv *env, jclass cls, jstring name, jint index) { 500 int ret = getFlags0(env, name); 501 return (ret & IFF_MULTICAST) ? JNI_TRUE : JNI_FALSE; 502 } 503 504 /* 505 * Class: java_net_NetworkInterface 506 * Method: getMacAddr0 507 * Signature: ([bLjava/lang/String;I)[b 508 */ 509 JNIEXPORT jbyteArray JNICALL Java_java_net_NetworkInterface_getMacAddr0(JNIEnv *env, jclass class, jbyteArray addrArray, jstring name, jint index) { 510 jint addr; 511 jbyte caddr[4]; 512 struct in_addr iaddr; 513 jbyteArray ret = NULL; 514 unsigned char mac[16]; 515 int len; 516 int sock; 517 jboolean isCopy; 518 const char* name_utf; 519 520 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy); 521 522 if ((sock =openSocketWithFallback(env, name_utf)) < 0) { 523 (*env)->ReleaseStringUTFChars(env, name, name_utf); 524 return JNI_FALSE; 525 } 526 527 528 if (!IS_NULL(addrArray)) { 529 (*env)->GetByteArrayRegion(env, addrArray, 0, 4, caddr); 530 addr = ((caddr[0]<<24) & 0xff000000); 531 addr |= ((caddr[1] <<16) & 0xff0000); 532 addr |= ((caddr[2] <<8) & 0xff00); 533 addr |= (caddr[3] & 0xff); 534 iaddr.s_addr = htonl(addr); 535 len = getMacAddress(env, sock, name_utf, &iaddr, mac); 536 } else { 537 len = getMacAddress(env, sock, name_utf,NULL, mac); 538 } 539 if (len > 0) { 540 ret = (*env)->NewByteArray(env, len); 541 if (IS_NULL(ret)) { 542 /* we may have memory to free at the end of this */ 543 goto fexit; 544 } 545 (*env)->SetByteArrayRegion(env, ret, 0, len, (jbyte *) (mac)); 546 } 547 fexit: 548 /* release the UTF string and interface list */ 549 (*env)->ReleaseStringUTFChars(env, name, name_utf); 550 551 close(sock); 552 return ret; 553 } 554 555 /* 556 * Class: java_net_NetworkInterface 557 * Method: getMTU0 558 * Signature: ([bLjava/lang/String;I)I 559 */ 560 561 JNIEXPORT jint JNICALL Java_java_net_NetworkInterface_getMTU0(JNIEnv *env, jclass class, jstring name, jint index) { 562 jboolean isCopy; 563 int ret = -1; 564 int sock; 565 const char* name_utf; 566 567 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy); 568 569 if ((sock =openSocketWithFallback(env, name_utf)) < 0) { 570 (*env)->ReleaseStringUTFChars(env, name, name_utf); 571 return JNI_FALSE; 572 } 573 574 ret = getMTU(env, sock, name_utf); 575 576 (*env)->ReleaseStringUTFChars(env, name, name_utf); 577 578 close(sock); 579 return ret; 580 } 581 582 /*** Private methods definitions ****/ 583 584 static int getFlags0(JNIEnv *env, jstring name) { 585 jboolean isCopy; 586 int ret, sock; 587 const char* name_utf; 588 int flags = 0; 589 590 name_utf = (*env)->GetStringUTFChars(env, name, &isCopy); 591 592 if ((sock = openSocketWithFallback(env, name_utf)) < 0) { 593 (*env)->ReleaseStringUTFChars(env, name, name_utf); 594 return -1; 595 } 596 597 ret = getFlags(sock, name_utf, &flags); 598 599 close(sock); 600 (*env)->ReleaseStringUTFChars(env, name, name_utf); 601 602 if (ret < 0) { 603 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFFLAGS failed"); 604 return -1; 605 } 606 607 return flags; 608 } 609 610 611 612 613 /* 614 * Create a NetworkInterface object, populate the name and index, and 615 * populate the InetAddress array based on the IP addresses for this 616 * interface. 617 */ 618 jobject createNetworkInterface(JNIEnv *env, netif *ifs) { 619 jobject netifObj; 620 jobject name; 621 jobjectArray addrArr; 622 jobjectArray bindArr; 623 jobjectArray childArr; 624 netaddr *addrs; 625 jint addr_index, addr_count, bind_index; 626 jint child_count, child_index; 627 netaddr *addrP; 628 netif *childP; 629 jobject tmp; 630 631 /* 632 * Create a NetworkInterface object and populate it 633 */ 634 netifObj = (*env)->NewObject(env, ni_class, ni_ctrID); 635 name = (*env)->NewStringUTF(env, ifs->name); 636 if (netifObj == NULL || name == NULL) { 637 return NULL; 638 } 639 (*env)->SetObjectField(env, netifObj, ni_nameID, name); 640 (*env)->SetObjectField(env, netifObj, ni_descID, name); 641 (*env)->SetIntField(env, netifObj, ni_indexID, ifs->index); 642 (*env)->SetBooleanField(env, netifObj, ni_virutalID, ifs->virtual ? JNI_TRUE : JNI_FALSE); 643 644 /* 645 * Count the number of address on this interface 646 */ 647 addr_count = 0; 648 addrP = ifs->addr; 649 while (addrP != NULL) { 650 addr_count++; 651 addrP = addrP->next; 652 } 653 654 /* 655 * Create the array of InetAddresses 656 */ 657 addrArr = (*env)->NewObjectArray(env, addr_count, ni_iacls, NULL); 658 if (addrArr == NULL) { 659 return NULL; 660 } 661 662 bindArr = (*env)->NewObjectArray(env, addr_count, ni_ibcls, NULL); 663 if (bindArr == NULL) { 664 return NULL; 665 } 666 addrP = ifs->addr; 667 addr_index = 0; 668 bind_index = 0; 669 while (addrP != NULL) { 670 jobject iaObj = NULL; 671 jobject ibObj = NULL; 672 673 if (addrP->family == AF_INET) { 674 iaObj = (*env)->NewObject(env, ni_ia4cls, ni_ia4ctrID); 675 if (iaObj) { 676 setInetAddress_addr(env, iaObj, htonl(((struct sockaddr_in*)addrP->addr)->sin_addr.s_addr)); 677 } 678 ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID); 679 if (ibObj) { 680 (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj); 681 if (addrP->brdcast) { 682 jobject ia2Obj = NULL; 683 ia2Obj = (*env)->NewObject(env, ni_ia4cls, ni_ia4ctrID); 684 if (ia2Obj) { 685 setInetAddress_addr(env, ia2Obj, htonl(((struct sockaddr_in*)addrP->brdcast)->sin_addr.s_addr)); 686 (*env)->SetObjectField(env, ibObj, ni_ib4broadcastID, ia2Obj); 687 } 688 } 689 (*env)->SetShortField(env, ibObj, ni_ib4maskID, addrP->mask); 690 (*env)->SetObjectArrayElement(env, bindArr, bind_index++, ibObj); 691 } 692 } 693 694 #ifdef AF_INET6 695 if (addrP->family == AF_INET6) { 696 int scope=0; 697 iaObj = (*env)->NewObject(env, ni_ia6cls, ni_ia6ctrID); 698 if (iaObj) { 699 int ret = setInet6Address_ipaddress(env, iaObj, (char *)&(((struct sockaddr_in6*)addrP->addr)->sin6_addr)); 700 if (ret == JNI_FALSE) { 701 return NULL; 702 } 703 704 scope = ((struct sockaddr_in6*)addrP->addr)->sin6_scope_id; 705 706 if (scope != 0) { /* zero is default value, no need to set */ 707 setInet6Address_scopeid(env, iaObj, scope); 708 setInet6Address_scopeifname(env, iaObj, netifObj); 709 } 710 } 711 ibObj = (*env)->NewObject(env, ni_ibcls, ni_ibctrID); 712 if (ibObj) { 713 (*env)->SetObjectField(env, ibObj, ni_ibaddressID, iaObj); 714 (*env)->SetShortField(env, ibObj, ni_ib4maskID, addrP->mask); 715 (*env)->SetObjectArrayElement(env, bindArr, bind_index++, ibObj); 716 } 717 } 718 #endif 719 720 if (iaObj == NULL) { 721 return NULL; 722 } 723 724 (*env)->SetObjectArrayElement(env, addrArr, addr_index++, iaObj); 725 addrP = addrP->next; 726 } 727 728 /* 729 * See if there is any virtual interface attached to this one. 730 */ 731 child_count = 0; 732 childP = ifs->childs; 733 while (childP) { 734 child_count++; 735 childP = childP->next; 736 } 737 738 childArr = (*env)->NewObjectArray(env, child_count, ni_class, NULL); 739 if (childArr == NULL) { 740 return NULL; 741 } 742 743 /* 744 * Create the NetworkInterface instances for the sub-interfaces as 745 * well. 746 */ 747 child_index = 0; 748 childP = ifs->childs; 749 while(childP) { 750 tmp = createNetworkInterface(env, childP); 751 if (tmp == NULL) { 752 return NULL; 753 } 754 (*env)->SetObjectField(env, tmp, ni_parentID, netifObj); 755 (*env)->SetObjectArrayElement(env, childArr, child_index++, tmp); 756 childP = childP->next; 757 } 758 (*env)->SetObjectField(env, netifObj, ni_addrsID, addrArr); 759 (*env)->SetObjectField(env, netifObj, ni_bindsID, bindArr); 760 (*env)->SetObjectField(env, netifObj, ni_childsID, childArr); 761 762 /* return the NetworkInterface */ 763 return netifObj; 764 } 765 766 /* 767 * Enumerates all interfaces 768 */ 769 static netif *enumInterfaces(JNIEnv *env) { 770 netif *ifs; 771 int sock; 772 773 /* 774 * Enumerate IPv4 addresses 775 */ 776 777 sock = openSocket(env, AF_INET); 778 if (sock < 0 && (*env)->ExceptionOccurred(env)) { 779 return NULL; 780 } 781 782 ifs = enumIPv4Interfaces(env, sock, NULL); 783 close(sock); 784 785 if (ifs == NULL && (*env)->ExceptionOccurred(env)) { 786 return NULL; 787 } 788 789 /* return partial list if an exception occurs in the middle of process ???*/ 790 791 /* 792 * If IPv6 is available then enumerate IPv6 addresses. 793 */ 794 #ifdef AF_INET6 795 796 /* User can disable ipv6 explicitly by -Djava.net.preferIPv4Stack=true, 797 * so we have to call ipv6_available() 798 */ 799 if (ipv6_available()) { 800 801 sock = openSocket(env, AF_INET6); 802 if (sock < 0 && (*env)->ExceptionOccurred(env)) { 803 freeif(ifs); 804 return NULL; 805 } 806 807 ifs = enumIPv6Interfaces(env, sock, ifs); 808 close(sock); 809 810 if ((*env)->ExceptionOccurred(env)) { 811 freeif(ifs); 812 return NULL; 813 } 814 815 } 816 #endif 817 818 return ifs; 819 } 820 821 #define CHECKED_MALLOC3(_pointer,_type,_size) \ 822 do{ \ 823 _pointer = (_type)malloc( _size ); \ 824 if (_pointer == NULL) { \ 825 JNU_ThrowOutOfMemoryError(env, "Native heap allocation failed"); \ 826 return ifs; /* return untouched list */ \ 827 } \ 828 } while(0) 829 830 831 /* 832 * Free an interface list (including any attached addresses) 833 */ 834 void freeif(netif *ifs) { 835 netif *currif = ifs; 836 netif *child = NULL; 837 838 while (currif != NULL) { 839 netaddr *addrP = currif->addr; 840 while (addrP != NULL) { 841 netaddr *next = addrP->next; 842 free(addrP); 843 addrP = next; 844 } 845 846 /* 847 * Don't forget to free the sub-interfaces. 848 */ 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 netif *addif(JNIEnv *env, int sock, const char * if_name, 860 netif *ifs, struct sockaddr* ifr_addrP, int family, 861 short prefix) 862 { 863 netif *currif = ifs, *parent; 864 netaddr *addrP; 865 866 #ifdef LIFNAMSIZ 867 int ifnam_size = LIFNAMSIZ; 868 char name[LIFNAMSIZ], vname[LIFNAMSIZ]; 869 #else 870 int ifnam_size = IFNAMSIZ; 871 char name[IFNAMSIZ], vname[IFNAMSIZ]; 872 #endif 873 874 char *name_colonP; 875 int mask; 876 int isVirtual = 0; 877 int addr_size; 878 int flags = 0; 879 880 /* 881 * If the interface name is a logical interface then we 882 * remove the unit number so that we have the physical 883 * interface (eg: hme0:1 -> hme0). NetworkInterface 884 * currently doesn't have any concept of physical vs. 885 * logical interfaces. 886 */ 887 strncpy(name, if_name, ifnam_size); 888 name[ifnam_size - 1] = '\0'; 889 *vname = 0; 890 891 /* 892 * Create and populate the netaddr node. If allocation fails 893 * return an un-updated list. 894 */ 895 /*Allocate for addr and brdcast at once*/ 896 897 #ifdef AF_INET6 898 addr_size = (family == AF_INET) ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6); 899 #else 900 addr_size = sizeof(struct sockaddr_in); 901 #endif 902 903 CHECKED_MALLOC3(addrP, netaddr *, sizeof(netaddr)+2*addr_size); 904 addrP->addr = (struct sockaddr *)( (char *) addrP+sizeof(netaddr) ); 905 memcpy(addrP->addr, ifr_addrP, addr_size); 906 907 addrP->family = family; 908 addrP->brdcast = NULL; 909 addrP->mask = prefix; 910 addrP->next = 0; 911 if (family == AF_INET) { 912 // Deal with broadcast addr & subnet mask 913 struct sockaddr * brdcast_to = (struct sockaddr *) ((char *) addrP + sizeof(netaddr) + addr_size); 914 addrP->brdcast = getBroadcast(env, sock, name, brdcast_to ); 915 916 if ((mask = getSubnet(env, sock, name)) != -1) 917 addrP->mask = mask; 918 } 919 920 /** 921 * Deal with virtual interface with colon notation e.g. eth0:1 922 */ 923 name_colonP = strchr(name, ':'); 924 if (name_colonP != NULL) { 925 /** 926 * This is a virtual interface. If we are able to access the parent 927 * we need to create a new entry if it doesn't exist yet *and* update 928 * the 'parent' interface with the new records. 929 */ 930 *name_colonP = 0; 931 if (getFlags(sock, name, &flags) < 0 || flags < 0) { 932 // failed to access parent interface do not create parent. 933 // We are a virtual interface with no parent. 934 isVirtual = 1; 935 *name_colonP = ':'; 936 } 937 else{ 938 // Got access to parent, so create it if necessary. 939 // Save original name to vname and truncate name by ':' 940 memcpy(vname, name, sizeof(vname) ); 941 vname[name_colonP - name] = ':'; 942 } 943 } 944 945 /* 946 * Check if this is a "new" interface. Use the interface 947 * name for matching because index isn't supported on 948 * Solaris 2.6 & 7. 949 */ 950 while (currif != NULL) { 951 if (strcmp(name, currif->name) == 0) { 952 break; 953 } 954 currif = currif->next; 955 } 956 957 /* 958 * If "new" then create an netif structure and 959 * insert it onto the list. 960 */ 961 if (currif == NULL) { 962 CHECKED_MALLOC3(currif, netif *, sizeof(netif) + ifnam_size); 963 currif->name = (char *) currif+sizeof(netif); 964 strncpy(currif->name, name, ifnam_size); 965 currif->name[ifnam_size - 1] = '\0'; 966 currif->index = getIndex(sock, name); 967 currif->addr = NULL; 968 currif->childs = NULL; 969 currif->virtual = isVirtual; 970 currif->next = ifs; 971 ifs = currif; 972 } 973 974 /* 975 * Finally insert the address on the interface 976 */ 977 addrP->next = currif->addr; 978 currif->addr = addrP; 979 980 parent = currif; 981 982 /** 983 * Let's deal with the virtual interface now. 984 */ 985 if (vname[0]) { 986 netaddr *tmpaddr; 987 988 currif = parent->childs; 989 990 while (currif != NULL) { 991 if (strcmp(vname, currif->name) == 0) { 992 break; 993 } 994 currif = currif->next; 995 } 996 997 if (currif == NULL) { 998 CHECKED_MALLOC3(currif, netif *, sizeof(netif) + ifnam_size); 999 currif->name = (char *) currif + sizeof(netif); 1000 strncpy(currif->name, vname, ifnam_size); 1001 currif->name[ifnam_size - 1] = '\0'; 1002 currif->index = getIndex(sock, vname); 1003 currif->addr = NULL; 1004 /* Need to duplicate the addr entry? */ 1005 currif->virtual = 1; 1006 currif->childs = NULL; 1007 currif->next = parent->childs; 1008 parent->childs = currif; 1009 } 1010 1011 CHECKED_MALLOC3(tmpaddr, netaddr *, sizeof(netaddr)+2*addr_size); 1012 memcpy(tmpaddr, addrP, sizeof(netaddr)); 1013 if (addrP->addr != NULL) { 1014 tmpaddr->addr = (struct sockaddr *) ( (char*)tmpaddr + sizeof(netaddr) ) ; 1015 memcpy(tmpaddr->addr, addrP->addr, addr_size); 1016 } 1017 1018 if (addrP->brdcast != NULL) { 1019 tmpaddr->brdcast = (struct sockaddr *) ((char *) tmpaddr + sizeof(netaddr)+addr_size); 1020 memcpy(tmpaddr->brdcast, addrP->brdcast, addr_size); 1021 } 1022 1023 tmpaddr->next = currif->addr; 1024 currif->addr = tmpaddr; 1025 } 1026 1027 return ifs; 1028 } 1029 1030 /* Open socket for further ioct calls 1031 * proto is AF_INET/AF_INET6 1032 */ 1033 static int openSocket(JNIEnv *env, int proto){ 1034 int sock; 1035 1036 if ((sock = JVM_Socket(proto, SOCK_DGRAM, 0)) < 0) { 1037 /* 1038 * If EPROTONOSUPPORT is returned it means we don't have 1039 * support for this proto so don't throw an exception. 1040 */ 1041 if (errno != EPROTONOSUPPORT) { 1042 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "Socket creation failed"); 1043 } 1044 return -1; 1045 } 1046 1047 return sock; 1048 } 1049 1050 1051 /** Linux, AIX **/ 1052 #if defined(__linux__) || defined(_AIX) 1053 /* Open socket for further ioct calls, try v4 socket first and 1054 * if it falls return v6 socket 1055 */ 1056 1057 #ifdef AF_INET6 1058 static int openSocketWithFallback(JNIEnv *env, const char *ifname){ 1059 int sock; 1060 struct ifreq if2; 1061 1062 if ((sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 1063 if (errno == EPROTONOSUPPORT){ 1064 if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){ 1065 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed"); 1066 return -1; 1067 } 1068 } 1069 else{ // errno is not NOSUPPORT 1070 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed"); 1071 return -1; 1072 } 1073 } 1074 1075 /* Linux starting from 2.6.? kernel allows ioctl call with either IPv4 or IPv6 socket regardless of type 1076 of address of an interface */ 1077 1078 return sock; 1079 } 1080 1081 #else 1082 static int openSocketWithFallback(JNIEnv *env, const char *ifname){ 1083 return openSocket(env,AF_INET); 1084 } 1085 #endif 1086 1087 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) { 1088 struct ifconf ifc; 1089 struct ifreq *ifreqP; 1090 char *buf = NULL; 1091 int numifs; 1092 unsigned i; 1093 int siocgifconfRequest = SIOCGIFCONF; 1094 1095 1096 #if defined(__linux__) 1097 /* need to do a dummy SIOCGIFCONF to determine the buffer size. 1098 * SIOCGIFCOUNT doesn't work 1099 */ 1100 ifc.ifc_buf = NULL; 1101 if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) { 1102 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGIFCONF failed"); 1103 return ifs; 1104 } 1105 #elif defined(_AIX) 1106 ifc.ifc_buf = NULL; 1107 if (ioctl(sock, SIOCGSIZIFCONF, &(ifc.ifc_len)) < 0) { 1108 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGSIZIFCONF failed"); 1109 return ifs; 1110 } 1111 #endif /* __linux__ */ 1112 1113 CHECKED_MALLOC3(buf,char *, ifc.ifc_len); 1114 1115 ifc.ifc_buf = buf; 1116 #if defined(_AIX) 1117 siocgifconfRequest = CSIOCGIFCONF; 1118 #endif 1119 if (ioctl(sock, siocgifconfRequest, (char *)&ifc) < 0) { 1120 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGIFCONF failed"); 1121 (void) free(buf); 1122 return ifs; 1123 } 1124 1125 /* 1126 * Iterate through each interface 1127 */ 1128 ifreqP = ifc.ifc_req; 1129 for (i=0; i<ifc.ifc_len/sizeof (struct ifreq); i++, ifreqP++) { 1130 #if defined(_AIX) 1131 if (ifreqP->ifr_addr.sa_family != AF_INET) continue; 1132 #endif 1133 /* 1134 * Add to the list 1135 */ 1136 ifs = addif(env, sock, ifreqP->ifr_name, ifs, (struct sockaddr *) & (ifreqP->ifr_addr), AF_INET, 0); 1137 1138 /* 1139 * If an exception occurred then free the list 1140 */ 1141 if ((*env)->ExceptionOccurred(env)) { 1142 free(buf); 1143 freeif(ifs); 1144 return NULL; 1145 } 1146 } 1147 1148 /* 1149 * Free socket and buffer 1150 */ 1151 free(buf); 1152 return ifs; 1153 } 1154 1155 1156 /* 1157 * Enumerates and returns all IPv6 interfaces on Linux 1158 */ 1159 1160 #if defined(AF_INET6) && defined(__linux__) 1161 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) { 1162 FILE *f; 1163 char addr6[40], devname[21]; 1164 char addr6p[8][5]; 1165 int plen, scope, dad_status, if_idx; 1166 uint8_t ipv6addr[16]; 1167 1168 if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) { 1169 while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %08x %02x %02x %02x %20s\n", 1170 addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4], addr6p[5], addr6p[6], addr6p[7], 1171 &if_idx, &plen, &scope, &dad_status, devname) != EOF) { 1172 1173 struct netif *ifs_ptr = NULL; 1174 struct netif *last_ptr = NULL; 1175 struct sockaddr_in6 addr; 1176 1177 sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s", 1178 addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4], addr6p[5], addr6p[6], addr6p[7]); 1179 inet_pton(AF_INET6, addr6, ipv6addr); 1180 1181 memset(&addr, 0, sizeof(struct sockaddr_in6)); 1182 memcpy((void*)addr.sin6_addr.s6_addr, (const void*)ipv6addr, 16); 1183 1184 addr.sin6_scope_id = if_idx; 1185 1186 ifs = addif(env, sock, devname, ifs, (struct sockaddr *)&addr, AF_INET6, plen); 1187 1188 1189 /* 1190 * If an exception occurred then return the list as is. 1191 */ 1192 if ((*env)->ExceptionOccurred(env)) { 1193 fclose(f); 1194 return ifs; 1195 } 1196 } 1197 fclose(f); 1198 } 1199 return ifs; 1200 } 1201 #endif 1202 1203 1204 /* 1205 * Enumerates and returns all IPv6 interfaces on AIX 1206 */ 1207 1208 #if defined(AF_INET6) && defined(_AIX) 1209 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) { 1210 struct ifconf ifc; 1211 struct ifreq *ifreqP; 1212 char *buf; 1213 int numifs; 1214 unsigned i; 1215 unsigned bufsize; 1216 char *cp, *cplimit; 1217 1218 /* use SIOCGSIZIFCONF to get size for SIOCGIFCONF */ 1219 1220 ifc.ifc_buf = NULL; 1221 if (ioctl(sock, SIOCGSIZIFCONF, &(ifc.ifc_len)) < 0) { 1222 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", 1223 "ioctl SIOCGSIZIFCONF failed"); 1224 return ifs; 1225 } 1226 bufsize = ifc.ifc_len; 1227 1228 buf = (char *)malloc(bufsize); 1229 if (!buf) { 1230 JNU_ThrowOutOfMemoryError(env, "Network interface native buffer allocation failed"); 1231 return ifs; 1232 } 1233 ifc.ifc_len = bufsize; 1234 ifc.ifc_buf = buf; 1235 if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) { 1236 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", 1237 "ioctl CSIOCGIFCONF failed"); 1238 free(buf); 1239 return ifs; 1240 } 1241 1242 /* 1243 * Iterate through each interface 1244 */ 1245 ifreqP = ifc.ifc_req; 1246 cp = (char *)ifc.ifc_req; 1247 cplimit = cp + ifc.ifc_len; 1248 1249 for ( ; cp < cplimit; cp += (sizeof(ifreqP->ifr_name) + MAX((ifreqP->ifr_addr).sa_len, sizeof(ifreqP->ifr_addr)))) { 1250 ifreqP = (struct ifreq *)cp; 1251 struct ifreq if2; 1252 1253 memset((char *)&if2, 0, sizeof(if2)); 1254 strcpy(if2.ifr_name, ifreqP->ifr_name); 1255 1256 /* 1257 * Skip interface that aren't UP 1258 */ 1259 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) >= 0) { 1260 if (!(if2.ifr_flags & IFF_UP)) { 1261 continue; 1262 } 1263 } 1264 1265 if (ifreqP->ifr_addr.sa_family != AF_INET6) 1266 continue; 1267 1268 /* 1269 * Add to the list 1270 */ 1271 ifs = addif(env, sock, ifreqP->ifr_name, ifs, 1272 (struct sockaddr *)&(ifreqP->ifr_addr), 1273 AF_INET6, 0); 1274 1275 /* 1276 * If an exception occurred then free the list 1277 */ 1278 if ((*env)->ExceptionOccurred(env)) { 1279 free(buf); 1280 freeif(ifs); 1281 return NULL; 1282 } 1283 } 1284 1285 /* 1286 * Free socket and buffer 1287 */ 1288 free(buf); 1289 return ifs; 1290 } 1291 #endif 1292 1293 1294 static int getIndex(int sock, const char *name){ 1295 /* 1296 * Try to get the interface index 1297 */ 1298 #if defined(_AIX) 1299 return if_nametoindex(name); 1300 #else 1301 struct ifreq if2; 1302 strcpy(if2.ifr_name, name); 1303 1304 if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) { 1305 return -1; 1306 } 1307 1308 return if2.ifr_ifindex; 1309 #endif 1310 } 1311 1312 /** 1313 * Returns the IPv4 broadcast address of a named interface, if it exists. 1314 * Returns 0 if it doesn't have one. 1315 */ 1316 static struct sockaddr *getBroadcast(JNIEnv *env, int sock, const char *ifname, struct sockaddr *brdcast_store) { 1317 struct sockaddr *ret = NULL; 1318 struct ifreq if2; 1319 1320 memset((char *) &if2, 0, sizeof(if2)); 1321 strcpy(if2.ifr_name, ifname); 1322 1323 /* Let's make sure the interface does have a broadcast address */ 1324 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0) { 1325 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFFLAGS failed"); 1326 return ret; 1327 } 1328 1329 if (if2.ifr_flags & IFF_BROADCAST) { 1330 /* It does, let's retrieve it*/ 1331 if (ioctl(sock, SIOCGIFBRDADDR, (char *)&if2) < 0) { 1332 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFBRDADDR failed"); 1333 return ret; 1334 } 1335 1336 ret = brdcast_store; 1337 memcpy(ret, &if2.ifr_broadaddr, sizeof(struct sockaddr)); 1338 } 1339 1340 return ret; 1341 } 1342 1343 /** 1344 * Returns the IPv4 subnet prefix length (aka subnet mask) for the named 1345 * interface, if it has one, otherwise return -1. 1346 */ 1347 static short getSubnet(JNIEnv *env, int sock, const char *ifname) { 1348 unsigned int mask; 1349 short ret; 1350 struct ifreq if2; 1351 1352 memset((char *) &if2, 0, sizeof(if2)); 1353 strcpy(if2.ifr_name, ifname); 1354 1355 if (ioctl(sock, SIOCGIFNETMASK, (char *)&if2) < 0) { 1356 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFNETMASK failed"); 1357 return -1; 1358 } 1359 1360 mask = ntohl(((struct sockaddr_in*)&(if2.ifr_addr))->sin_addr.s_addr); 1361 ret = 0; 1362 while (mask) { 1363 mask <<= 1; 1364 ret++; 1365 } 1366 1367 return ret; 1368 } 1369 1370 /** 1371 * Get the Hardware address (usually MAC address) for the named interface. 1372 * return puts the data in buf, and returns the length, in byte, of the 1373 * MAC address. Returns -1 if there is no hardware address on that interface. 1374 */ 1375 static int getMacAddress(JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr, unsigned char *buf) { 1376 #if defined (_AIX) 1377 int size; 1378 struct kinfo_ndd *nddp; 1379 void *end; 1380 1381 size = getkerninfo(KINFO_NDD, 0, 0, 0); 1382 if (size == 0) { 1383 return -1; 1384 } 1385 1386 if (size < 0) { 1387 perror("getkerninfo 1"); 1388 return -1; 1389 } 1390 1391 nddp = (struct kinfo_ndd *)malloc(size); 1392 1393 if (!nddp) { 1394 return -1; 1395 } 1396 1397 if (getkerninfo(KINFO_NDD, nddp, &size, 0) < 0) { 1398 perror("getkerninfo 2"); 1399 return -1; 1400 } 1401 1402 end = (void *)nddp + size; 1403 while ((void *)nddp < end) { 1404 if (!strcmp(nddp->ndd_alias, ifname) || 1405 !strcmp(nddp->ndd_name, ifname)) { 1406 bcopy(nddp->ndd_addr, buf, 6); 1407 return 6; 1408 } else { 1409 nddp++; 1410 } 1411 } 1412 1413 return -1; 1414 1415 #elif defined(__linux__) 1416 static struct ifreq ifr; 1417 int i; 1418 1419 strcpy(ifr.ifr_name, ifname); 1420 if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0) { 1421 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFHWADDR failed"); 1422 return -1; 1423 } 1424 1425 memcpy(buf, &ifr.ifr_hwaddr.sa_data, IFHWADDRLEN); 1426 1427 /* 1428 * All bytes to 0 means no hardware address. 1429 */ 1430 1431 for (i = 0; i < IFHWADDRLEN; i++) { 1432 if (buf[i] != 0) 1433 return IFHWADDRLEN; 1434 } 1435 1436 return -1; 1437 #endif 1438 } 1439 1440 static int getMTU(JNIEnv *env, int sock, const char *ifname) { 1441 struct ifreq if2; 1442 1443 memset((char *) &if2, 0, sizeof(if2)); 1444 strcpy(if2.ifr_name, ifname); 1445 1446 if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) { 1447 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFMTU failed"); 1448 return -1; 1449 } 1450 1451 return if2.ifr_mtu; 1452 } 1453 1454 static int getFlags(int sock, const char *ifname, int *flags) { 1455 struct ifreq if2; 1456 1457 memset((char *) &if2, 0, sizeof(if2)); 1458 strcpy(if2.ifr_name, ifname); 1459 1460 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0){ 1461 return -1; 1462 } 1463 1464 if (sizeof(if2.ifr_flags) == sizeof(short)) { 1465 *flags = (if2.ifr_flags & 0xffff); 1466 } else { 1467 *flags = if2.ifr_flags; 1468 } 1469 return 0; 1470 } 1471 1472 #endif 1473 1474 /** Solaris **/ 1475 #ifdef __solaris__ 1476 /* Open socket for further ioct calls, try v4 socket first and 1477 * if it falls return v6 socket 1478 */ 1479 1480 #ifdef AF_INET6 1481 static int openSocketWithFallback(JNIEnv *env, const char *ifname){ 1482 int sock, alreadyV6 = 0; 1483 struct lifreq if2; 1484 1485 if ((sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 1486 if (errno == EPROTONOSUPPORT){ 1487 if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){ 1488 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed"); 1489 return -1; 1490 } 1491 1492 alreadyV6=1; 1493 } 1494 else{ // errno is not NOSUPPORT 1495 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed"); 1496 return -1; 1497 } 1498 } 1499 1500 /** 1501 * Solaris requires that we have an IPv6 socket to query an 1502 * interface without an IPv4 address - check it here. 1503 * POSIX 1 require the kernel to return ENOTTY if the call is 1504 * inappropriate for a device e.g. the NETMASK for a device having IPv6 1505 * only address but not all devices follow the standard so 1506 * fall back on any error. It's not an ecologically friendly gesture 1507 * but more reliable. 1508 */ 1509 1510 if (! alreadyV6 ){ 1511 memset((char *) &if2, 0, sizeof(if2)); 1512 strcpy(if2.lifr_name, ifname); 1513 if (ioctl(sock, SIOCGLIFNETMASK, (char *)&if2) < 0) { 1514 close(sock); 1515 if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){ 1516 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed"); 1517 return -1; 1518 } 1519 } 1520 } 1521 1522 return sock; 1523 } 1524 1525 #else 1526 static int openSocketWithFallback(JNIEnv *env, const char *ifname){ 1527 return openSocket(env,AF_INET); 1528 } 1529 #endif 1530 1531 /* 1532 * Enumerates and returns all IPv4 interfaces 1533 * (linux verision) 1534 */ 1535 1536 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) { 1537 return enumIPvXInterfaces(env,sock, ifs, AF_INET); 1538 } 1539 1540 #ifdef AF_INET6 1541 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) { 1542 return enumIPvXInterfaces(env,sock, ifs, AF_INET6); 1543 } 1544 #endif 1545 1546 /* 1547 Enumerates and returns all interfaces on Solaris 1548 use the same code for IPv4 and IPv6 1549 */ 1550 static netif *enumIPvXInterfaces(JNIEnv *env, int sock, netif *ifs, int family) { 1551 struct lifconf ifc; 1552 struct lifreq *ifr; 1553 int n; 1554 char *buf; 1555 struct lifnum numifs; 1556 unsigned bufsize; 1557 1558 /* 1559 * Get the interface count 1560 */ 1561 numifs.lifn_family = family; 1562 numifs.lifn_flags = 0; 1563 if (ioctl(sock, SIOCGLIFNUM, (char *)&numifs) < 0) { 1564 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGLIFNUM failed"); 1565 return ifs; 1566 } 1567 1568 /* 1569 * Enumerate the interface configurations 1570 */ 1571 bufsize = numifs.lifn_count * sizeof (struct lifreq); 1572 CHECKED_MALLOC3(buf, char *, bufsize); 1573 1574 ifc.lifc_family = family; 1575 ifc.lifc_flags = 0; 1576 ifc.lifc_len = bufsize; 1577 ifc.lifc_buf = buf; 1578 if (ioctl(sock, SIOCGLIFCONF, (char *)&ifc) < 0) { 1579 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "ioctl SIOCGLIFCONF failed"); 1580 free(buf); 1581 return ifs; 1582 } 1583 1584 /* 1585 * Iterate through each interface 1586 */ 1587 ifr = ifc.lifc_req; 1588 for (n=0; n<numifs.lifn_count; n++, ifr++) { 1589 int index = -1; 1590 struct lifreq if2; 1591 1592 /* 1593 * Ignore either IPv4 or IPv6 addresses 1594 */ 1595 if (ifr->lifr_addr.ss_family != family) { 1596 continue; 1597 } 1598 1599 #ifdef AF_INET6 1600 if (ifr->lifr_addr.ss_family == AF_INET6) { 1601 struct sockaddr_in6 *s6= (struct sockaddr_in6 *)&(ifr->lifr_addr); 1602 s6->sin6_scope_id = getIndex(sock, ifr->lifr_name); 1603 } 1604 #endif 1605 1606 /* add to the list */ 1607 ifs = addif(env, sock,ifr->lifr_name, ifs, (struct sockaddr *)&(ifr->lifr_addr),family, (short) ifr->lifr_addrlen); 1608 1609 /* 1610 * If an exception occurred we return immediately 1611 */ 1612 if ((*env)->ExceptionOccurred(env)) { 1613 free(buf); 1614 return ifs; 1615 } 1616 1617 } 1618 1619 free(buf); 1620 return ifs; 1621 } 1622 1623 static int getIndex(int sock, const char *name){ 1624 /* 1625 * Try to get the interface index 1626 * (Not supported on Solaris 2.6 or 7) 1627 */ 1628 struct lifreq if2; 1629 strcpy(if2.lifr_name, name); 1630 1631 if (ioctl(sock, SIOCGLIFINDEX, (char *)&if2) < 0) { 1632 return -1; 1633 } 1634 1635 return if2.lifr_index; 1636 } 1637 1638 /** 1639 * Returns the IPv4 broadcast address of a named interface, if it exists. 1640 * Returns 0 if it doesn't have one. 1641 */ 1642 static struct sockaddr *getBroadcast(JNIEnv *env, int sock, const char *ifname, struct sockaddr *brdcast_store) { 1643 struct sockaddr *ret = NULL; 1644 struct lifreq if2; 1645 1646 memset((char *) &if2, 0, sizeof(if2)); 1647 strcpy(if2.lifr_name, ifname); 1648 1649 /* Let's make sure the interface does have a broadcast address */ 1650 if (ioctl(sock, SIOCGLIFFLAGS, (char *)&if2) < 0) { 1651 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFFLAGS failed"); 1652 return ret; 1653 } 1654 1655 if (if2.lifr_flags & IFF_BROADCAST) { 1656 /* It does, let's retrieve it*/ 1657 if (ioctl(sock, SIOCGLIFBRDADDR, (char *)&if2) < 0) { 1658 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFBRDADDR failed"); 1659 return ret; 1660 } 1661 1662 ret = brdcast_store; 1663 memcpy(ret, &if2.lifr_broadaddr, sizeof(struct sockaddr)); 1664 } 1665 1666 return ret; 1667 } 1668 1669 /** 1670 * Returns the IPv4 subnet prefix length (aka subnet mask) for the named 1671 * interface, if it has one, otherwise return -1. 1672 */ 1673 static short getSubnet(JNIEnv *env, int sock, const char *ifname) { 1674 unsigned int mask; 1675 short ret; 1676 struct lifreq if2; 1677 1678 memset((char *) &if2, 0, sizeof(if2)); 1679 strcpy(if2.lifr_name, ifname); 1680 1681 if (ioctl(sock, SIOCGLIFNETMASK, (char *)&if2) < 0) { 1682 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFNETMASK failed"); 1683 return -1; 1684 } 1685 1686 mask = ntohl(((struct sockaddr_in*)&(if2.lifr_addr))->sin_addr.s_addr); 1687 ret = 0; 1688 1689 while (mask) { 1690 mask <<= 1; 1691 ret++; 1692 } 1693 1694 return ret; 1695 } 1696 1697 1698 1699 #define DEV_PREFIX "/dev/" 1700 1701 /** 1702 * Solaris specific DLPI code to get hardware address from a device. 1703 * Unfortunately, at least up to Solaris X, you have to have special 1704 * privileges (i.e. be root). 1705 */ 1706 static int getMacFromDevice(JNIEnv *env, const char* ifname, unsigned char* retbuf) { 1707 char style1dev[MAXPATHLEN]; 1708 int fd; 1709 dl_phys_addr_req_t dlpareq; 1710 dl_phys_addr_ack_t *dlpaack; 1711 struct strbuf msg; 1712 char buf[128]; 1713 int flags = 0; 1714 1715 /** 1716 * Device is in /dev 1717 * e.g.: /dev/bge0 1718 */ 1719 strcpy(style1dev, DEV_PREFIX); 1720 strcat(style1dev, ifname); 1721 if ((fd = open(style1dev, O_RDWR)) < 0) { 1722 /* 1723 * Can't open it. We probably are missing the privilege. 1724 * We'll have to try something else 1725 */ 1726 return 0; 1727 } 1728 1729 dlpareq.dl_primitive = DL_PHYS_ADDR_REQ; 1730 dlpareq.dl_addr_type = DL_CURR_PHYS_ADDR; 1731 1732 msg.buf = (char *)&dlpareq; 1733 msg.len = DL_PHYS_ADDR_REQ_SIZE; 1734 1735 if (putmsg(fd, &msg, NULL, 0) < 0) { 1736 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "putmsg failed"); 1737 return -1; 1738 } 1739 1740 dlpaack = (dl_phys_addr_ack_t *)buf; 1741 1742 msg.buf = (char *)buf; 1743 msg.len = 0; 1744 msg.maxlen = sizeof (buf); 1745 if (getmsg(fd, &msg, NULL, &flags) < 0) { 1746 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "getmsg failed"); 1747 return -1; 1748 } 1749 1750 if (msg.len < DL_PHYS_ADDR_ACK_SIZE || dlpaack->dl_primitive != DL_PHYS_ADDR_ACK) { 1751 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Couldn't obtain phys addr\n"); 1752 return -1; 1753 } 1754 1755 memcpy(retbuf, &buf[dlpaack->dl_addr_offset], dlpaack->dl_addr_length); 1756 return dlpaack->dl_addr_length; 1757 } 1758 1759 /** 1760 * Get the Hardware address (usually MAC address) for the named interface. 1761 * return puts the data in buf, and returns the length, in byte, of the 1762 * MAC address. Returns -1 if there is no hardware address on that interface. 1763 */ 1764 static int getMacAddress(JNIEnv *env, int sock, const char *ifname, const struct in_addr* addr, unsigned char *buf) { 1765 struct arpreq arpreq; 1766 struct sockaddr_in* sin; 1767 struct sockaddr_in ipAddr; 1768 int len, i; 1769 struct lifreq lif; 1770 1771 /* First, try the new (S11) SIOCGLIFHWADDR ioctl(). If that fails 1772 * try the old way. 1773 */ 1774 memset(&lif, 0, sizeof(lif)); 1775 strlcpy(lif.lifr_name, ifname, sizeof(lif.lifr_name)); 1776 1777 if (ioctl(sock, SIOCGLIFHWADDR, &lif) != -1) { 1778 struct sockaddr_dl *sp; 1779 sp = (struct sockaddr_dl *)&lif.lifr_addr; 1780 memcpy(buf, &sp->sdl_data[0], sp->sdl_alen); 1781 return sp->sdl_alen; 1782 } 1783 1784 /** 1785 * On Solaris we have to use DLPI, but it will only work if we have 1786 * privileged access (i.e. root). If that fails, we try a lookup 1787 * in the ARP table, which requires an IPv4 address. 1788 */ 1789 if ((len = getMacFromDevice(env, ifname, buf)) == 0) { 1790 /*DLPI failed - trying to do arp lookup*/ 1791 1792 if (addr == NULL) { 1793 /** 1794 * No IPv4 address for that interface, so can't do an ARP lookup. 1795 */ 1796 return -1; 1797 } 1798 1799 len = 6; //??? 1800 1801 sin = (struct sockaddr_in *) &arpreq.arp_pa; 1802 memset((char *) &arpreq, 0, sizeof(struct arpreq)); 1803 ipAddr.sin_port = 0; 1804 ipAddr.sin_family = AF_INET; 1805 memcpy(&ipAddr.sin_addr, addr, sizeof(struct in_addr)); 1806 memcpy(&arpreq.arp_pa, &ipAddr, sizeof(struct sockaddr_in)); 1807 arpreq.arp_flags= ATF_PUBL; 1808 1809 if (ioctl(sock, SIOCGARP, &arpreq) < 0) { 1810 return -1; 1811 } 1812 1813 memcpy(buf, &arpreq.arp_ha.sa_data[0], len ); 1814 } 1815 1816 /* 1817 * All bytes to 0 means no hardware address. 1818 */ 1819 1820 for (i = 0; i < len; i++) { 1821 if (buf[i] != 0) 1822 return len; 1823 } 1824 1825 return -1; 1826 } 1827 1828 static int getMTU(JNIEnv *env, int sock, const char *ifname) { 1829 struct lifreq if2; 1830 1831 memset((char *) &if2, 0, sizeof(if2)); 1832 strcpy(if2.lifr_name, ifname); 1833 1834 if (ioctl(sock, SIOCGLIFMTU, (char *)&if2) < 0) { 1835 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGLIFMTU failed"); 1836 return -1; 1837 } 1838 1839 return if2.lifr_mtu; 1840 } 1841 1842 1843 static int getFlags(int sock, const char *ifname, int *flags) { 1844 struct lifreq lifr; 1845 memset((caddr_t)&lifr, 0, sizeof(lifr)); 1846 strcpy((caddr_t)&(lifr.lifr_name), ifname); 1847 1848 if (ioctl(sock, SIOCGLIFFLAGS, (char *)&lifr) < 0) { 1849 return -1; 1850 } 1851 1852 *flags = lifr.lifr_flags; 1853 return 0; 1854 } 1855 1856 1857 #endif 1858 1859 1860 /** BSD **/ 1861 #ifdef _ALLBSD_SOURCE 1862 /* Open socket for further ioct calls, try v4 socket first and 1863 * if it falls return v6 socket 1864 */ 1865 1866 #ifdef AF_INET6 1867 static int openSocketWithFallback(JNIEnv *env, const char *ifname){ 1868 int sock; 1869 struct ifreq if2; 1870 1871 if ((sock = JVM_Socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 1872 if (errno == EPROTONOSUPPORT){ 1873 if ( (sock = JVM_Socket(AF_INET6, SOCK_DGRAM, 0)) < 0 ){ 1874 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV6 Socket creation failed"); 1875 return -1; 1876 } 1877 } 1878 else{ // errno is not NOSUPPORT 1879 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", "IPV4 Socket creation failed"); 1880 return -1; 1881 } 1882 } 1883 1884 return sock; 1885 } 1886 1887 #else 1888 static int openSocketWithFallback(JNIEnv *env, const char *ifname){ 1889 return openSocket(env,AF_INET); 1890 } 1891 #endif 1892 1893 /* 1894 * Enumerates and returns all IPv4 interfaces 1895 */ 1896 static netif *enumIPv4Interfaces(JNIEnv *env, int sock, netif *ifs) { 1897 struct ifaddrs *ifa, *origifa; 1898 1899 if (getifaddrs(&origifa) != 0) { 1900 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", 1901 "getifaddrs() function failed"); 1902 return ifs; 1903 } 1904 1905 for (ifa = origifa; ifa != NULL; ifa = ifa->ifa_next) { 1906 1907 /* 1908 * Skip non-AF_INET entries. 1909 */ 1910 if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET) 1911 continue; 1912 1913 /* 1914 * Add to the list. 1915 */ 1916 ifs = addif(env, sock, ifa->ifa_name, ifs, ifa->ifa_addr, AF_INET, 0); 1917 1918 /* 1919 * If an exception occurred then free the list. 1920 */ 1921 if ((*env)->ExceptionOccurred(env)) { 1922 freeifaddrs(origifa); 1923 freeif(ifs); 1924 return NULL; 1925 } 1926 } 1927 1928 /* 1929 * Free socket and buffer 1930 */ 1931 freeifaddrs(origifa); 1932 return ifs; 1933 } 1934 1935 1936 /* 1937 * Enumerates and returns all IPv6 interfaces on Linux 1938 */ 1939 1940 #ifdef AF_INET6 1941 /* 1942 * Determines the prefix on BSD for IPv6 interfaces. 1943 */ 1944 static 1945 int prefix(void *val, int size) { 1946 u_char *name = (u_char *)val; 1947 int byte, bit, plen = 0; 1948 1949 for (byte = 0; byte < size; byte++, plen += 8) 1950 if (name[byte] != 0xff) 1951 break; 1952 if (byte == size) 1953 return (plen); 1954 for (bit = 7; bit != 0; bit--, plen++) 1955 if (!(name[byte] & (1 << bit))) 1956 break; 1957 for (; bit != 0; bit--) 1958 if (name[byte] & (1 << bit)) 1959 return (0); 1960 byte++; 1961 for (; byte < size; byte++) 1962 if (name[byte]) 1963 return (0); 1964 return (plen); 1965 } 1966 1967 /* 1968 * Enumerates and returns all IPv6 interfaces on BSD 1969 */ 1970 static netif *enumIPv6Interfaces(JNIEnv *env, int sock, netif *ifs) { 1971 struct ifaddrs *ifa, *origifa; 1972 struct sockaddr_in6 *sin6; 1973 struct in6_ifreq ifr6; 1974 1975 if (getifaddrs(&origifa) != 0) { 1976 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", 1977 "getifaddrs() function failed"); 1978 return ifs; 1979 } 1980 1981 for (ifa = origifa; ifa != NULL; ifa = ifa->ifa_next) { 1982 1983 /* 1984 * Skip non-AF_INET6 entries. 1985 */ 1986 if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET6) 1987 continue; 1988 1989 memset(&ifr6, 0, sizeof(ifr6)); 1990 strlcpy(ifr6.ifr_name, ifa->ifa_name, sizeof(ifr6.ifr_name)); 1991 memcpy(&ifr6.ifr_addr, ifa->ifa_addr, MIN(sizeof(ifr6.ifr_addr), ifa->ifa_addr->sa_len)); 1992 1993 if (ioctl(sock, SIOCGIFNETMASK_IN6, (caddr_t)&ifr6) < 0) { 1994 NET_ThrowByNameWithLastError(env , JNU_JAVANETPKG "SocketException", 1995 "ioctl SIOCGIFNETMASK_IN6 failed"); 1996 freeifaddrs(origifa); 1997 freeif(ifs); 1998 return NULL; 1999 } 2000 2001 /* Add to the list. */ 2002 sin6 = (struct sockaddr_in6 *)&ifr6.ifr_addr; 2003 ifs = addif(env, sock, ifa->ifa_name, ifs, ifa->ifa_addr, AF_INET6, 2004 prefix(&sin6->sin6_addr, sizeof(struct in6_addr))); 2005 2006 /* If an exception occurred then free the list. */ 2007 if ((*env)->ExceptionOccurred(env)) { 2008 freeifaddrs(origifa); 2009 freeif(ifs); 2010 return NULL; 2011 } 2012 } 2013 2014 /* 2015 * Free socket and ifaddrs buffer 2016 */ 2017 freeifaddrs(origifa); 2018 return ifs; 2019 } 2020 #endif 2021 2022 static int getIndex(int sock, const char *name){ 2023 #ifdef __FreeBSD__ 2024 /* 2025 * Try to get the interface index 2026 * (Not supported on Solaris 2.6 or 7) 2027 */ 2028 struct ifreq if2; 2029 strcpy(if2.ifr_name, name); 2030 2031 if (ioctl(sock, SIOCGIFINDEX, (char *)&if2) < 0) { 2032 return -1; 2033 } 2034 2035 return if2.ifr_index; 2036 #else 2037 /* 2038 * Try to get the interface index using BSD specific if_nametoindex 2039 */ 2040 int index = if_nametoindex(name); 2041 return (index == 0) ? -1 : index; 2042 #endif 2043 } 2044 2045 /** 2046 * Returns the IPv4 broadcast address of a named interface, if it exists. 2047 * Returns 0 if it doesn't have one. 2048 */ 2049 static struct sockaddr *getBroadcast(JNIEnv *env, int sock, const char *ifname, struct sockaddr *brdcast_store) { 2050 struct sockaddr *ret = NULL; 2051 struct ifreq if2; 2052 2053 memset((char *) &if2, 0, sizeof(if2)); 2054 strcpy(if2.ifr_name, ifname); 2055 2056 /* Let's make sure the interface does have a broadcast address */ 2057 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0) { 2058 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFFLAGS failed"); 2059 return ret; 2060 } 2061 2062 if (if2.ifr_flags & IFF_BROADCAST) { 2063 /* It does, let's retrieve it*/ 2064 if (ioctl(sock, SIOCGIFBRDADDR, (char *)&if2) < 0) { 2065 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFBRDADDR failed"); 2066 return ret; 2067 } 2068 2069 ret = brdcast_store; 2070 memcpy(ret, &if2.ifr_broadaddr, sizeof(struct sockaddr)); 2071 } 2072 2073 return ret; 2074 } 2075 2076 /** 2077 * Returns the IPv4 subnet prefix length (aka subnet mask) for the named 2078 * interface, if it has one, otherwise return -1. 2079 */ 2080 static short getSubnet(JNIEnv *env, int sock, const char *ifname) { 2081 unsigned int mask; 2082 short ret; 2083 struct ifreq if2; 2084 2085 memset((char *) &if2, 0, sizeof(if2)); 2086 strcpy(if2.ifr_name, ifname); 2087 2088 if (ioctl(sock, SIOCGIFNETMASK, (char *)&if2) < 0) { 2089 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFNETMASK failed"); 2090 return -1; 2091 } 2092 2093 mask = ntohl(((struct sockaddr_in*)&(if2.ifr_addr))->sin_addr.s_addr); 2094 ret = 0; 2095 while (mask) { 2096 mask <<= 1; 2097 ret++; 2098 } 2099 2100 return ret; 2101 } 2102 2103 /** 2104 * Get the Hardware address (usually MAC address) for the named interface. 2105 * return puts the data in buf, and returns the length, in byte, of the 2106 * MAC address. Returns -1 if there is no hardware address on that interface. 2107 */ 2108 static int getMacAddress(JNIEnv *env, int sock, const char* ifname, const struct in_addr* addr, unsigned char *buf) { 2109 struct ifaddrs *ifa0, *ifa; 2110 struct sockaddr *saddr; 2111 int i; 2112 2113 /* Grab the interface list */ 2114 if (!getifaddrs(&ifa0)) { 2115 /* Cycle through the interfaces */ 2116 for (i = 0, ifa = ifa0; ifa != NULL; ifa = ifa->ifa_next, i++) { 2117 saddr = ifa->ifa_addr; 2118 /* Link layer contains the MAC address */ 2119 if (saddr->sa_family == AF_LINK && !strcmp(ifname, ifa->ifa_name)) { 2120 struct sockaddr_dl *sadl = (struct sockaddr_dl *) saddr; 2121 /* Check the address is the correct length */ 2122 if (sadl->sdl_alen == ETHER_ADDR_LEN) { 2123 memcpy(buf, (sadl->sdl_data + sadl->sdl_nlen), ETHER_ADDR_LEN); 2124 freeifaddrs(ifa0); 2125 return ETHER_ADDR_LEN; 2126 } 2127 } 2128 } 2129 freeifaddrs(ifa0); 2130 } 2131 2132 return -1; 2133 } 2134 2135 static int getMTU(JNIEnv *env, int sock, const char *ifname) { 2136 struct ifreq if2; 2137 2138 memset((char *) &if2, 0, sizeof(if2)); 2139 strcpy(if2.ifr_name, ifname); 2140 2141 if (ioctl(sock, SIOCGIFMTU, (char *)&if2) < 0) { 2142 NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "IOCTL SIOCGIFMTU failed"); 2143 return -1; 2144 } 2145 2146 return if2.ifr_mtu; 2147 } 2148 2149 static int getFlags(int sock, const char *ifname, int *flags) { 2150 struct ifreq if2; 2151 int ret = -1; 2152 2153 memset((char *) &if2, 0, sizeof(if2)); 2154 strcpy(if2.ifr_name, ifname); 2155 2156 if (ioctl(sock, SIOCGIFFLAGS, (char *)&if2) < 0){ 2157 return -1; 2158 } 2159 2160 if (sizeof(if2.ifr_flags) == sizeof(short)) { 2161 *flags = (if2.ifr_flags & 0xffff); 2162 } else { 2163 *flags = if2.ifr_flags; 2164 } 2165 return 0; 2166 } 2167 2168 #endif