Piotr Jastrzebski | 51b1b69 | 2015-02-16 15:01:09 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2000, 2012, 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 <sys/time.h> |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/socket.h> |
| 30 | #include <netinet/in.h> |
| 31 | #include <netdb.h> |
| 32 | #include <string.h> |
| 33 | #include <strings.h> |
| 34 | #include <stdlib.h> |
| 35 | #include <ctype.h> |
| 36 | #ifdef _ALLBSD_SOURCE |
| 37 | #include <unistd.h> /* gethostname */ |
| 38 | #endif |
| 39 | |
| 40 | #include "jvm.h" |
| 41 | #include "jni_util.h" |
| 42 | #include "net_util.h" |
| 43 | #ifndef IPV6_DEFS_H |
| 44 | #include <netinet/icmp6.h> |
| 45 | #endif |
| 46 | |
| 47 | #include "java_net_Inet4AddressImpl.h" |
| 48 | #include "java_net_Inet6AddressImpl.h" |
| 49 | |
| 50 | /* the initial size of our hostent buffers */ |
| 51 | #ifndef NI_MAXHOST |
| 52 | #define NI_MAXHOST 1025 |
| 53 | #endif |
| 54 | |
| 55 | |
| 56 | /************************************************************************ |
| 57 | * Inet6AddressImpl |
| 58 | */ |
| 59 | |
| 60 | /* |
| 61 | * Class: java_net_Inet6AddressImpl |
| 62 | * Method: getLocalHostName |
| 63 | * Signature: ()Ljava/lang/String; |
| 64 | */ |
| 65 | JNIEXPORT jstring JNICALL |
| 66 | Java_java_net_Inet6AddressImpl_getLocalHostName(JNIEnv *env, jobject this) { |
| 67 | char hostname[NI_MAXHOST+1]; |
| 68 | |
| 69 | hostname[0] = '\0'; |
| 70 | if (JVM_GetHostName(hostname, sizeof(hostname))) { |
| 71 | /* Something went wrong, maybe networking is not setup? */ |
| 72 | strcpy(hostname, "localhost"); |
| 73 | } else { |
| 74 | // ensure null-terminated |
| 75 | hostname[NI_MAXHOST] = '\0'; |
| 76 | #if defined(__linux__) || defined(_ALLBSD_SOURCE) |
| 77 | /* On Linux/FreeBSD gethostname() says "host.domain.sun.com". On |
| 78 | * Solaris gethostname() says "host", so extra work is needed. |
| 79 | */ |
| 80 | #else |
| 81 | /* Solaris doesn't want to give us a fully qualified domain name. |
| 82 | * We do a reverse lookup to try and get one. This works |
| 83 | * if DNS occurs before NIS in /etc/resolv.conf, but fails |
| 84 | * if NIS comes first (it still gets only a partial name). |
| 85 | * We use thread-safe system calls. |
| 86 | */ |
| 87 | #ifdef AF_INET6 |
| 88 | if (NET_addrtransAvailable()) { |
| 89 | struct addrinfo hints, *res; |
| 90 | int error; |
| 91 | |
| 92 | bzero(&hints, sizeof(hints)); |
| 93 | hints.ai_flags = AI_CANONNAME; |
| 94 | hints.ai_family = AF_UNSPEC; |
| 95 | |
| 96 | error = (*getaddrinfo_ptr)(hostname, NULL, &hints, &res); |
| 97 | |
| 98 | if (error == 0) { |
| 99 | /* host is known to name service */ |
| 100 | error = (*getnameinfo_ptr)(res->ai_addr, |
| 101 | res->ai_addrlen, |
| 102 | hostname, |
| 103 | NI_MAXHOST, |
| 104 | NULL, |
| 105 | 0, |
| 106 | NI_NAMEREQD); |
| 107 | |
| 108 | /* if getnameinfo fails hostname is still the value |
| 109 | from gethostname */ |
| 110 | |
| 111 | (*freeaddrinfo_ptr)(res); |
| 112 | } |
| 113 | } |
| 114 | #endif /* AF_INET6 */ |
| 115 | #endif /* __linux__ || _ALLBSD_SOURCE */ |
| 116 | } |
| 117 | return (*env)->NewStringUTF(env, hostname); |
| 118 | } |
| 119 | |
| 120 | static jclass ni_iacls; |
| 121 | static jclass ni_ia4cls; |
| 122 | static jclass ni_ia6cls; |
| 123 | static jmethodID ni_ia4ctrID; |
| 124 | static jmethodID ni_ia6ctrID; |
| 125 | static jfieldID ni_ia6ipaddressID; |
| 126 | static int initialized = 0; |
| 127 | |
| 128 | /* |
| 129 | * Find an internet address for a given hostname. Note that this |
| 130 | * code only works for addresses of type INET. The translation |
| 131 | * of %d.%d.%d.%d to an address (int) occurs in java now, so the |
| 132 | * String "host" shouldn't *ever* be a %d.%d.%d.%d string |
| 133 | * |
| 134 | * Class: java_net_Inet6AddressImpl |
| 135 | * Method: lookupAllHostAddr |
| 136 | * Signature: (Ljava/lang/String;)[[B |
| 137 | */ |
| 138 | |
| 139 | JNIEXPORT jobjectArray JNICALL |
| 140 | Java_java_net_Inet6AddressImpl_lookupAllHostAddr(JNIEnv *env, jobject this, |
| 141 | jstring host) { |
| 142 | const char *hostname; |
| 143 | jobjectArray ret = 0; |
| 144 | int retLen = 0; |
| 145 | jboolean preferIPv6Address; |
| 146 | |
| 147 | int error=0; |
| 148 | #ifdef AF_INET6 |
| 149 | struct addrinfo hints, *res, *resNew = NULL; |
| 150 | #endif /* AF_INET6 */ |
| 151 | |
| 152 | if (!initialized) { |
| 153 | ni_iacls = (*env)->FindClass(env, "java/net/InetAddress"); |
| 154 | ni_iacls = (*env)->NewGlobalRef(env, ni_iacls); |
| 155 | ni_ia4cls = (*env)->FindClass(env, "java/net/Inet4Address"); |
| 156 | ni_ia4cls = (*env)->NewGlobalRef(env, ni_ia4cls); |
| 157 | ni_ia6cls = (*env)->FindClass(env, "java/net/Inet6Address"); |
| 158 | ni_ia6cls = (*env)->NewGlobalRef(env, ni_ia6cls); |
| 159 | ni_ia4ctrID = (*env)->GetMethodID(env, ni_ia4cls, "<init>", "()V"); |
| 160 | ni_ia6ctrID = (*env)->GetMethodID(env, ni_ia6cls, "<init>", "()V"); |
| 161 | ni_ia6ipaddressID = (*env)->GetFieldID(env, ni_ia6cls, "ipaddress", "[B"); |
| 162 | initialized = 1; |
| 163 | } |
| 164 | |
| 165 | if (IS_NULL(host)) { |
| 166 | JNU_ThrowNullPointerException(env, "host is null"); |
| 167 | return 0; |
| 168 | } |
| 169 | hostname = JNU_GetStringPlatformChars(env, host, JNI_FALSE); |
| 170 | CHECK_NULL_RETURN(hostname, NULL); |
| 171 | |
| 172 | #ifdef AF_INET6 |
| 173 | if (NET_addrtransAvailable()) { |
| 174 | static jfieldID ia_preferIPv6AddressID; |
| 175 | if (ia_preferIPv6AddressID == NULL) { |
| 176 | jclass c = (*env)->FindClass(env,"java/net/InetAddress"); |
| 177 | if (c) { |
| 178 | ia_preferIPv6AddressID = |
| 179 | (*env)->GetStaticFieldID(env, c, "preferIPv6Address", "Z"); |
| 180 | } |
| 181 | if (ia_preferIPv6AddressID == NULL) { |
| 182 | JNU_ReleaseStringPlatformChars(env, host, hostname); |
| 183 | return NULL; |
| 184 | } |
| 185 | } |
| 186 | /* get the address preference */ |
| 187 | preferIPv6Address |
| 188 | = (*env)->GetStaticBooleanField(env, ia_class, ia_preferIPv6AddressID); |
| 189 | |
| 190 | /* Try once, with our static buffer. */ |
| 191 | bzero(&hints, sizeof(hints)); |
| 192 | hints.ai_flags = AI_CANONNAME; |
| 193 | hints.ai_family = AF_UNSPEC; |
| 194 | |
| 195 | #ifdef __solaris__ |
| 196 | /* |
| 197 | * Workaround for Solaris bug 4160367 - if a hostname contains a |
| 198 | * white space then 0.0.0.0 is returned |
| 199 | */ |
| 200 | if (isspace((unsigned char)hostname[0])) { |
| 201 | JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException", |
| 202 | hostname); |
| 203 | JNU_ReleaseStringPlatformChars(env, host, hostname); |
| 204 | return NULL; |
| 205 | } |
| 206 | #endif |
| 207 | |
| 208 | error = (*getaddrinfo_ptr)(hostname, NULL, &hints, &res); |
| 209 | |
| 210 | if (error) { |
| 211 | /* report error */ |
| 212 | ThrowUnknownHostExceptionWithGaiError(env, hostname, error); |
| 213 | JNU_ReleaseStringPlatformChars(env, host, hostname); |
| 214 | return NULL; |
| 215 | } else { |
| 216 | int i = 0; |
| 217 | int inetCount = 0, inet6Count = 0, inetIndex, inet6Index; |
| 218 | struct addrinfo *itr, *last = NULL, *iterator = res; |
| 219 | while (iterator != NULL) { |
| 220 | int skip = 0; |
| 221 | itr = resNew; |
| 222 | while (itr != NULL) { |
| 223 | if (iterator->ai_family == itr->ai_family && |
| 224 | iterator->ai_addrlen == itr->ai_addrlen) { |
| 225 | if (itr->ai_family == AF_INET) { /* AF_INET */ |
| 226 | struct sockaddr_in *addr1, *addr2; |
| 227 | addr1 = (struct sockaddr_in *)iterator->ai_addr; |
| 228 | addr2 = (struct sockaddr_in *)itr->ai_addr; |
| 229 | if (addr1->sin_addr.s_addr == |
| 230 | addr2->sin_addr.s_addr) { |
| 231 | skip = 1; |
| 232 | break; |
| 233 | } |
| 234 | } else { |
| 235 | int t; |
| 236 | struct sockaddr_in6 *addr1, *addr2; |
| 237 | addr1 = (struct sockaddr_in6 *)iterator->ai_addr; |
| 238 | addr2 = (struct sockaddr_in6 *)itr->ai_addr; |
| 239 | |
| 240 | for (t = 0; t < 16; t++) { |
| 241 | if (addr1->sin6_addr.s6_addr[t] != |
| 242 | addr2->sin6_addr.s6_addr[t]) { |
| 243 | break; |
| 244 | } |
| 245 | } |
| 246 | if (t < 16) { |
| 247 | itr = itr->ai_next; |
| 248 | continue; |
| 249 | } else { |
| 250 | skip = 1; |
| 251 | break; |
| 252 | } |
| 253 | } |
| 254 | } else if (iterator->ai_family != AF_INET && |
| 255 | iterator->ai_family != AF_INET6) { |
| 256 | /* we can't handle other family types */ |
| 257 | skip = 1; |
| 258 | break; |
| 259 | } |
| 260 | itr = itr->ai_next; |
| 261 | } |
| 262 | |
| 263 | if (!skip) { |
| 264 | struct addrinfo *next |
| 265 | = (struct addrinfo*) malloc(sizeof(struct addrinfo)); |
| 266 | if (!next) { |
| 267 | JNU_ThrowOutOfMemoryError(env, "Native heap allocation failed"); |
| 268 | ret = NULL; |
| 269 | goto cleanupAndReturn; |
| 270 | } |
| 271 | memcpy(next, iterator, sizeof(struct addrinfo)); |
| 272 | next->ai_next = NULL; |
| 273 | if (resNew == NULL) { |
| 274 | resNew = next; |
| 275 | } else { |
| 276 | last->ai_next = next; |
| 277 | } |
| 278 | last = next; |
| 279 | i++; |
| 280 | if (iterator->ai_family == AF_INET) { |
| 281 | inetCount ++; |
| 282 | } else if (iterator->ai_family == AF_INET6) { |
| 283 | inet6Count ++; |
| 284 | } |
| 285 | } |
| 286 | iterator = iterator->ai_next; |
| 287 | } |
| 288 | retLen = i; |
| 289 | iterator = resNew; |
| 290 | |
| 291 | ret = (*env)->NewObjectArray(env, retLen, ni_iacls, NULL); |
| 292 | |
| 293 | if (IS_NULL(ret)) { |
| 294 | /* we may have memory to free at the end of this */ |
| 295 | goto cleanupAndReturn; |
| 296 | } |
| 297 | |
| 298 | if (preferIPv6Address) { |
| 299 | /* AF_INET addresses will be offset by inet6Count */ |
| 300 | inetIndex = inet6Count; |
| 301 | inet6Index = 0; |
| 302 | } else { |
| 303 | /* AF_INET6 addresses will be offset by inetCount */ |
| 304 | inetIndex = 0; |
| 305 | inet6Index = inetCount; |
| 306 | } |
| 307 | |
| 308 | while (iterator != NULL) { |
| 309 | if (iterator->ai_family == AF_INET) { |
| 310 | jobject iaObj = (*env)->NewObject(env, ni_ia4cls, ni_ia4ctrID); |
| 311 | if (IS_NULL(iaObj)) { |
| 312 | ret = NULL; |
| 313 | goto cleanupAndReturn; |
| 314 | } |
| 315 | setInetAddress_addr(env, iaObj, ntohl(((struct sockaddr_in*)iterator->ai_addr)->sin_addr.s_addr)); |
| 316 | setInetAddress_hostName(env, iaObj, host); |
| 317 | (*env)->SetObjectArrayElement(env, ret, inetIndex, iaObj); |
| 318 | inetIndex++; |
| 319 | } else if (iterator->ai_family == AF_INET6) { |
| 320 | jint scope = 0; |
| 321 | jbyteArray ipaddress; |
| 322 | |
| 323 | jobject iaObj = (*env)->NewObject(env, ni_ia6cls, ni_ia6ctrID); |
| 324 | if (IS_NULL(iaObj)) { |
| 325 | ret = NULL; |
| 326 | goto cleanupAndReturn; |
| 327 | } |
| 328 | ipaddress = (*env)->NewByteArray(env, 16); |
| 329 | if (IS_NULL(ipaddress)) { |
| 330 | ret = NULL; |
| 331 | goto cleanupAndReturn; |
| 332 | } |
| 333 | (*env)->SetByteArrayRegion(env, ipaddress, 0, 16, |
| 334 | (jbyte *)&(((struct sockaddr_in6*)iterator->ai_addr)->sin6_addr)); |
| 335 | #ifdef __linux__ |
| 336 | if (!kernelIsV22()) { |
| 337 | scope = ((struct sockaddr_in6*)iterator->ai_addr)->sin6_scope_id; |
| 338 | } |
| 339 | #else |
| 340 | scope = ((struct sockaddr_in6*)iterator->ai_addr)->sin6_scope_id; |
| 341 | #endif |
| 342 | if (scope != 0) { /* zero is default value, no need to set */ |
| 343 | (*env)->SetIntField(env, iaObj, ia6_scopeidID, scope); |
| 344 | (*env)->SetBooleanField(env, iaObj, ia6_scopeidsetID, JNI_TRUE); |
| 345 | } |
| 346 | (*env)->SetObjectField(env, iaObj, ni_ia6ipaddressID, ipaddress); |
| 347 | setInetAddress_hostName(env, iaObj, host); |
| 348 | (*env)->SetObjectArrayElement(env, ret, inet6Index, iaObj); |
| 349 | inet6Index++; |
| 350 | } |
| 351 | iterator = iterator->ai_next; |
| 352 | } |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | cleanupAndReturn: |
| 357 | { |
| 358 | struct addrinfo *iterator, *tmp; |
| 359 | iterator = resNew; |
| 360 | while (iterator != NULL) { |
| 361 | tmp = iterator; |
| 362 | iterator = iterator->ai_next; |
| 363 | free(tmp); |
| 364 | } |
| 365 | JNU_ReleaseStringPlatformChars(env, host, hostname); |
| 366 | } |
| 367 | |
| 368 | if (NET_addrtransAvailable()) |
| 369 | (*freeaddrinfo_ptr)(res); |
| 370 | #endif /* AF_INET6 */ |
| 371 | |
| 372 | return ret; |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * Class: java_net_Inet6AddressImpl |
| 377 | * Method: getHostByAddr |
| 378 | * Signature: (I)Ljava/lang/String; |
| 379 | */ |
| 380 | JNIEXPORT jstring JNICALL |
| 381 | Java_java_net_Inet6AddressImpl_getHostByAddr(JNIEnv *env, jobject this, |
| 382 | jbyteArray addrArray) { |
| 383 | |
| 384 | jstring ret = NULL; |
| 385 | |
| 386 | #ifdef AF_INET6 |
| 387 | char host[NI_MAXHOST+1]; |
| 388 | int error = 0; |
| 389 | int len = 0; |
| 390 | jbyte caddr[16]; |
| 391 | |
| 392 | if (NET_addrtransAvailable()) { |
| 393 | struct sockaddr_in him4; |
| 394 | struct sockaddr_in6 him6; |
| 395 | struct sockaddr *sa; |
| 396 | |
| 397 | /* |
| 398 | * For IPv4 addresses construct a sockaddr_in structure. |
| 399 | */ |
| 400 | if ((*env)->GetArrayLength(env, addrArray) == 4) { |
| 401 | jint addr; |
| 402 | (*env)->GetByteArrayRegion(env, addrArray, 0, 4, caddr); |
| 403 | addr = ((caddr[0]<<24) & 0xff000000); |
| 404 | addr |= ((caddr[1] <<16) & 0xff0000); |
| 405 | addr |= ((caddr[2] <<8) & 0xff00); |
| 406 | addr |= (caddr[3] & 0xff); |
| 407 | memset((void *) &him4, 0, sizeof(him4)); |
| 408 | him4.sin_addr.s_addr = (uint32_t) htonl(addr); |
| 409 | him4.sin_family = AF_INET; |
| 410 | sa = (struct sockaddr *) &him4; |
| 411 | len = sizeof(him4); |
| 412 | } else { |
| 413 | /* |
| 414 | * For IPv6 address construct a sockaddr_in6 structure. |
| 415 | */ |
| 416 | (*env)->GetByteArrayRegion(env, addrArray, 0, 16, caddr); |
| 417 | memset((void *) &him6, 0, sizeof(him6)); |
| 418 | memcpy((void *)&(him6.sin6_addr), caddr, sizeof(struct in6_addr) ); |
| 419 | him6.sin6_family = AF_INET6; |
| 420 | sa = (struct sockaddr *) &him6 ; |
| 421 | len = sizeof(him6) ; |
| 422 | } |
| 423 | |
| 424 | error = (*getnameinfo_ptr)(sa, len, host, NI_MAXHOST, NULL, 0, |
| 425 | NI_NAMEREQD); |
| 426 | |
| 427 | if (!error) { |
| 428 | ret = (*env)->NewStringUTF(env, host); |
| 429 | } |
| 430 | } |
| 431 | #endif /* AF_INET6 */ |
| 432 | |
| 433 | if (ret == NULL) { |
| 434 | JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException", NULL); |
| 435 | } |
| 436 | |
| 437 | return ret; |
| 438 | } |
| 439 | |
| 440 | #define SET_NONBLOCKING(fd) { \ |
| 441 | int flags = fcntl(fd, F_GETFL); \ |
| 442 | flags |= O_NONBLOCK; \ |
| 443 | fcntl(fd, F_SETFL, flags); \ |
| 444 | } |
| 445 | |
| 446 | #ifdef AF_INET6 |
| 447 | static jboolean |
| 448 | ping6(JNIEnv *env, jint fd, struct sockaddr_in6* him, jint timeout, |
| 449 | struct sockaddr_in6* netif, jint ttl) { |
| 450 | jint size; |
| 451 | jint n; |
| 452 | socklen_t len; |
| 453 | char sendbuf[1500]; |
| 454 | unsigned char recvbuf[1500]; |
| 455 | struct icmp6_hdr *icmp6; |
| 456 | struct sockaddr_in6 sa_recv; |
| 457 | jbyte *caddr, *recv_caddr; |
| 458 | jchar pid; |
| 459 | jint tmout2, seq = 1; |
| 460 | struct timeval tv; |
| 461 | size_t plen; |
| 462 | |
| 463 | #ifdef __linux__ |
| 464 | { |
| 465 | int csum_offset; |
| 466 | /** |
| 467 | * For some strange reason, the linux kernel won't calculate the |
| 468 | * checksum of ICMPv6 packets unless you set this socket option |
| 469 | */ |
| 470 | csum_offset = 2; |
| 471 | setsockopt(fd, SOL_RAW, IPV6_CHECKSUM, &csum_offset, sizeof(int)); |
| 472 | } |
| 473 | #endif |
| 474 | |
| 475 | caddr = (jbyte *)&(him->sin6_addr); |
| 476 | |
| 477 | /* icmp_id is a 16 bit data type, therefore down cast the pid */ |
| 478 | pid = (jchar)getpid(); |
| 479 | size = 60*1024; |
| 480 | setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &size, sizeof(size)); |
| 481 | if (ttl > 0) { |
| 482 | setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)); |
| 483 | } |
| 484 | if (netif != NULL) { |
| 485 | if (bind(fd, (struct sockaddr*)netif, sizeof(struct sockaddr_in6)) <0) { |
| 486 | NET_ThrowNew(env, errno, "Can't bind socket"); |
| 487 | close(fd); |
| 488 | return JNI_FALSE; |
| 489 | } |
| 490 | } |
| 491 | SET_NONBLOCKING(fd); |
| 492 | |
| 493 | do { |
| 494 | icmp6 = (struct icmp6_hdr *) sendbuf; |
| 495 | icmp6->icmp6_type = ICMP6_ECHO_REQUEST; |
| 496 | icmp6->icmp6_code = 0; |
| 497 | /* let's tag the ECHO packet with our pid so we can identify it */ |
| 498 | icmp6->icmp6_id = htons(pid); |
| 499 | icmp6->icmp6_seq = htons(seq); |
| 500 | seq++; |
| 501 | icmp6->icmp6_cksum = 0; |
| 502 | gettimeofday(&tv, NULL); |
| 503 | memcpy(sendbuf + sizeof(struct icmp6_hdr), &tv, sizeof(tv)); |
| 504 | plen = sizeof(struct icmp6_hdr) + sizeof(tv); |
| 505 | n = sendto(fd, sendbuf, plen, 0, (struct sockaddr*) him, sizeof(struct sockaddr_in6)); |
| 506 | if (n < 0 && errno != EINPROGRESS) { |
| 507 | #ifdef __linux__ |
| 508 | if (errno != EINVAL && errno != EHOSTUNREACH) |
| 509 | /* |
| 510 | * On some Linuxes, when bound to the loopback interface, sendto |
| 511 | * will fail and errno will be set to EINVAL or EHOSTUNREACH. |
| 512 | * When that happens, don't throw an exception, just return false. |
| 513 | */ |
| 514 | #endif /*__linux__ */ |
| 515 | NET_ThrowNew(env, errno, "Can't send ICMP packet"); |
| 516 | close(fd); |
| 517 | return JNI_FALSE; |
| 518 | } |
| 519 | |
| 520 | tmout2 = timeout > 1000 ? 1000 : timeout; |
| 521 | do { |
| 522 | tmout2 = NET_Wait(env, fd, NET_WAIT_READ, tmout2); |
| 523 | |
| 524 | if (tmout2 >= 0) { |
| 525 | len = sizeof(sa_recv); |
| 526 | n = recvfrom(fd, recvbuf, sizeof(recvbuf), 0, (struct sockaddr*) &sa_recv, &len); |
| 527 | icmp6 = (struct icmp6_hdr *) (recvbuf); |
| 528 | recv_caddr = (jbyte *)&(sa_recv.sin6_addr); |
| 529 | /* |
| 530 | * We did receive something, but is it what we were expecting? |
| 531 | * I.E.: An ICMP6_ECHO_REPLY packet with the proper PID and |
| 532 | * from the host that we are trying to determine is reachable. |
| 533 | */ |
| 534 | if (n >= 8 && icmp6->icmp6_type == ICMP6_ECHO_REPLY && |
| 535 | (ntohs(icmp6->icmp6_id) == pid)) { |
| 536 | if (NET_IsEqual(caddr, recv_caddr)) { |
| 537 | close(fd); |
| 538 | return JNI_TRUE; |
| 539 | } |
| 540 | if (NET_IsZeroAddr(caddr)) { |
| 541 | close(fd); |
| 542 | return JNI_TRUE; |
| 543 | } |
| 544 | } |
| 545 | } |
| 546 | } while (tmout2 > 0); |
| 547 | timeout -= 1000; |
| 548 | } while (timeout > 0); |
| 549 | close(fd); |
| 550 | return JNI_FALSE; |
| 551 | } |
| 552 | #endif /* AF_INET6 */ |
| 553 | |
| 554 | /* |
| 555 | * Class: java_net_Inet6AddressImpl |
| 556 | * Method: isReachable0 |
| 557 | * Signature: ([bII[bI)Z |
| 558 | */ |
| 559 | JNIEXPORT jboolean JNICALL |
| 560 | Java_java_net_Inet6AddressImpl_isReachable0(JNIEnv *env, jobject this, |
| 561 | jbyteArray addrArray, |
| 562 | jint scope, |
| 563 | jint timeout, |
| 564 | jbyteArray ifArray, |
| 565 | jint ttl, jint if_scope) { |
| 566 | #ifdef AF_INET6 |
| 567 | jbyte caddr[16]; |
| 568 | jint fd, sz; |
| 569 | struct sockaddr_in6 him6; |
| 570 | struct sockaddr_in6 inf6; |
| 571 | struct sockaddr_in6* netif = NULL; |
| 572 | int len = 0; |
| 573 | int connect_rv = -1; |
| 574 | |
| 575 | /* |
| 576 | * If IPv6 is not enable, then we can't reach an IPv6 address, can we? |
| 577 | */ |
| 578 | if (!ipv6_available()) { |
| 579 | return JNI_FALSE; |
| 580 | } |
| 581 | /* |
| 582 | * If it's an IPv4 address, ICMP won't work with IPv4 mapped address, |
| 583 | * therefore, let's delegate to the Inet4Address method. |
| 584 | */ |
| 585 | sz = (*env)->GetArrayLength(env, addrArray); |
| 586 | if (sz == 4) { |
| 587 | return Java_java_net_Inet4AddressImpl_isReachable0(env, this, |
| 588 | addrArray, |
| 589 | timeout, |
| 590 | ifArray, ttl); |
| 591 | } |
| 592 | |
| 593 | memset((void *) caddr, 0, 16); |
| 594 | memset((void *) &him6, 0, sizeof(him6)); |
| 595 | (*env)->GetByteArrayRegion(env, addrArray, 0, 16, caddr); |
| 596 | memcpy((void *)&(him6.sin6_addr), caddr, sizeof(struct in6_addr) ); |
| 597 | him6.sin6_family = AF_INET6; |
| 598 | #ifdef __linux__ |
| 599 | if (scope > 0) |
| 600 | him6.sin6_scope_id = scope; |
| 601 | else |
| 602 | him6.sin6_scope_id = getDefaultIPv6Interface( &(him6.sin6_addr)); |
| 603 | len = sizeof(struct sockaddr_in6); |
| 604 | #else |
| 605 | if (scope > 0) |
| 606 | him6.sin6_scope_id = scope; |
| 607 | len = sizeof(struct sockaddr_in6); |
| 608 | #endif |
| 609 | /* |
| 610 | * If a network interface was specified, let's create the address |
| 611 | * for it. |
| 612 | */ |
| 613 | if (!(IS_NULL(ifArray))) { |
| 614 | memset((void *) caddr, 0, 16); |
| 615 | memset((void *) &inf6, 0, sizeof(inf6)); |
| 616 | (*env)->GetByteArrayRegion(env, ifArray, 0, 16, caddr); |
| 617 | memcpy((void *)&(inf6.sin6_addr), caddr, sizeof(struct in6_addr) ); |
| 618 | inf6.sin6_family = AF_INET6; |
| 619 | inf6.sin6_scope_id = if_scope; |
| 620 | netif = &inf6; |
| 621 | } |
| 622 | /* |
| 623 | * If we can create a RAW socket, then when can use the ICMP ECHO_REQUEST |
| 624 | * otherwise we'll try a tcp socket to the Echo port (7). |
| 625 | * Note that this is empiric, and not connecting could mean it's blocked |
| 626 | * or the echo servioe has been disabled. |
| 627 | */ |
| 628 | |
| 629 | fd = JVM_Socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6); |
| 630 | |
| 631 | if (fd != -1) { /* Good to go, let's do a ping */ |
| 632 | return ping6(env, fd, &him6, timeout, netif, ttl); |
| 633 | } |
| 634 | |
| 635 | /* No good, let's fall back on TCP */ |
| 636 | fd = JVM_Socket(AF_INET6, SOCK_STREAM, 0); |
| 637 | if (fd == JVM_IO_ERR) { |
| 638 | /* note: if you run out of fds, you may not be able to load |
| 639 | * the exception class, and get a NoClassDefFoundError |
| 640 | * instead. |
| 641 | */ |
| 642 | NET_ThrowNew(env, errno, "Can't create socket"); |
| 643 | return JNI_FALSE; |
| 644 | } |
| 645 | if (ttl > 0) { |
| 646 | setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl)); |
| 647 | } |
| 648 | |
| 649 | /* |
| 650 | * A network interface was specified, so let's bind to it. |
| 651 | */ |
| 652 | if (netif != NULL) { |
| 653 | if (bind(fd, (struct sockaddr*)netif, sizeof(struct sockaddr_in6)) <0) { |
| 654 | NET_ThrowNew(env, errno, "Can't bind socket"); |
| 655 | close(fd); |
| 656 | return JNI_FALSE; |
| 657 | } |
| 658 | } |
| 659 | SET_NONBLOCKING(fd); |
| 660 | |
| 661 | /* no need to use NET_Connect as non-blocking */ |
| 662 | him6.sin6_port = htons((short) 7); /* Echo port */ |
| 663 | connect_rv = JVM_Connect(fd, (struct sockaddr *)&him6, len); |
| 664 | |
| 665 | /** |
| 666 | * connection established or refused immediately, either way it means |
| 667 | * we were able to reach the host! |
| 668 | */ |
| 669 | if (connect_rv == 0 || errno == ECONNREFUSED) { |
| 670 | close(fd); |
| 671 | return JNI_TRUE; |
| 672 | } else { |
| 673 | int optlen; |
| 674 | |
| 675 | switch (errno) { |
| 676 | case ENETUNREACH: /* Network Unreachable */ |
| 677 | case EAFNOSUPPORT: /* Address Family not supported */ |
| 678 | case EADDRNOTAVAIL: /* address is not available on the remote machine */ |
| 679 | #ifdef __linux__ |
| 680 | case EINVAL: |
| 681 | case EHOSTUNREACH: |
| 682 | /* |
| 683 | * On some Linuxes, when bound to the loopback interface, connect |
| 684 | * will fail and errno will be set to EINVAL or EHOSTUNREACH. |
| 685 | * When that happens, don't throw an exception, just return false. |
| 686 | */ |
| 687 | #endif /* __linux__ */ |
| 688 | close(fd); |
| 689 | return JNI_FALSE; |
| 690 | } |
| 691 | |
| 692 | if (errno != EINPROGRESS) { |
| 693 | NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException", |
| 694 | "connect failed"); |
| 695 | close(fd); |
| 696 | return JNI_FALSE; |
| 697 | } |
| 698 | |
| 699 | timeout = NET_Wait(env, fd, NET_WAIT_CONNECT, timeout); |
| 700 | |
| 701 | if (timeout >= 0) { |
| 702 | /* has connection been established */ |
| 703 | optlen = sizeof(connect_rv); |
| 704 | if (JVM_GetSockOpt(fd, SOL_SOCKET, SO_ERROR, (void*)&connect_rv, |
| 705 | &optlen) <0) { |
| 706 | connect_rv = errno; |
| 707 | } |
| 708 | if (connect_rv == 0 || ECONNREFUSED) { |
| 709 | close(fd); |
| 710 | return JNI_TRUE; |
| 711 | } |
| 712 | } |
| 713 | close(fd); |
| 714 | return JNI_FALSE; |
| 715 | } |
| 716 | #else /* AF_INET6 */ |
| 717 | return JNI_FALSE; |
| 718 | #endif /* AF_INET6 */ |
| 719 | } |