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