J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2006 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #include <windows.h> |
| 27 | #include <winsock2.h> |
| 28 | #include <ctype.h> |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <malloc.h> |
| 32 | #include <sys/types.h> |
| 33 | |
| 34 | #include "java_net_InetAddress.h" |
| 35 | #include "java_net_Inet4AddressImpl.h" |
| 36 | #include "net_util.h" |
| 37 | #include "icmp.h" |
| 38 | |
| 39 | |
| 40 | /* |
| 41 | * Returns true if hostname is in dotted IP address format. Note that this |
| 42 | * function performs a syntax check only. For each octet it just checks that |
| 43 | * the octet is at most 3 digits. |
| 44 | */ |
| 45 | jboolean isDottedIPAddress(const char *hostname, unsigned int *addrp) { |
| 46 | char *c = (char *)hostname; |
| 47 | int octets = 0; |
| 48 | unsigned int cur = 0; |
| 49 | int digit_cnt = 0; |
| 50 | |
| 51 | while (*c) { |
| 52 | if (*c == '.') { |
| 53 | if (digit_cnt == 0) { |
| 54 | return JNI_FALSE; |
| 55 | } else { |
| 56 | if (octets < 4) { |
| 57 | addrp[octets++] = cur; |
| 58 | cur = 0; |
| 59 | digit_cnt = 0; |
| 60 | } else { |
| 61 | return JNI_FALSE; |
| 62 | } |
| 63 | } |
| 64 | c++; |
| 65 | continue; |
| 66 | } |
| 67 | |
| 68 | if ((*c < '0') || (*c > '9')) { |
| 69 | return JNI_FALSE; |
| 70 | } |
| 71 | |
| 72 | digit_cnt++; |
| 73 | if (digit_cnt > 3) { |
| 74 | return JNI_FALSE; |
| 75 | } |
| 76 | |
| 77 | /* don't check if current octet > 255 */ |
| 78 | cur = cur*10 + (*c - '0'); |
| 79 | |
| 80 | /* Move onto next character and check for EOF */ |
| 81 | c++; |
| 82 | if (*c == '\0') { |
| 83 | if (octets < 4) { |
| 84 | addrp[octets++] = cur; |
| 85 | } else { |
| 86 | return JNI_FALSE; |
| 87 | } |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | return (jboolean)(octets == 4); |
| 92 | } |
| 93 | |
| 94 | /* |
| 95 | * Inet4AddressImpl |
| 96 | */ |
| 97 | |
| 98 | /* |
| 99 | * Class: java_net_Inet4AddressImpl |
| 100 | * Method: getLocalHostName |
| 101 | * Signature: ()Ljava/lang/String; |
| 102 | */ |
| 103 | JNIEXPORT jstring JNICALL |
| 104 | Java_java_net_Inet4AddressImpl_getLocalHostName (JNIEnv *env, jobject this) { |
| 105 | char hostname[256]; |
| 106 | |
| 107 | if (gethostname(hostname, sizeof hostname) == -1) { |
| 108 | strcpy(hostname, "localhost"); |
| 109 | } |
| 110 | return JNU_NewStringPlatform(env, hostname); |
| 111 | } |
| 112 | |
| 113 | static jclass ni_iacls; |
| 114 | static jclass ni_ia4cls; |
| 115 | static jmethodID ni_ia4ctrID; |
| 116 | static jfieldID ni_iaaddressID; |
| 117 | static jfieldID ni_iahostID; |
| 118 | static jfieldID ni_iafamilyID; |
| 119 | static int initialized = 0; |
| 120 | |
| 121 | /* |
| 122 | * Find an internet address for a given hostname. Not this this |
| 123 | * code only works for addresses of type INET. The translation |
| 124 | * of %d.%d.%d.%d to an address (int) occurs in java now, so the |
| 125 | * String "host" shouldn't be a %d.%d.%d.%d string. The only |
| 126 | * exception should be when any of the %d are out of range and |
| 127 | * we fallback to a lookup. |
| 128 | * |
| 129 | * Class: java_net_Inet4AddressImpl |
| 130 | * Method: lookupAllHostAddr |
| 131 | * Signature: (Ljava/lang/String;)[[B |
| 132 | * |
| 133 | * This is almost shared code |
| 134 | */ |
| 135 | |
| 136 | JNIEXPORT jobjectArray JNICALL |
| 137 | Java_java_net_Inet4AddressImpl_lookupAllHostAddr(JNIEnv *env, jobject this, |
| 138 | jstring host) { |
| 139 | const char *hostname; |
| 140 | jobject name; |
| 141 | struct hostent *hp; |
| 142 | unsigned int addr[4]; |
| 143 | |
| 144 | jobjectArray ret = NULL; |
| 145 | jclass byteArrayCls; |
| 146 | |
| 147 | if (!initialized) { |
| 148 | ni_iacls = (*env)->FindClass(env, "java/net/InetAddress"); |
| 149 | ni_iacls = (*env)->NewGlobalRef(env, ni_iacls); |
| 150 | ni_ia4cls = (*env)->FindClass(env, "java/net/Inet4Address"); |
| 151 | ni_ia4cls = (*env)->NewGlobalRef(env, ni_ia4cls); |
| 152 | ni_ia4ctrID = (*env)->GetMethodID(env, ni_ia4cls, "<init>", "()V"); |
| 153 | ni_iaaddressID = (*env)->GetFieldID(env, ni_iacls, "address", "I"); |
| 154 | ni_iafamilyID = (*env)->GetFieldID(env, ni_iacls, "family", "I"); |
| 155 | ni_iahostID = (*env)->GetFieldID(env, ni_iacls, "hostName", "Ljava/lang/String;"); |
| 156 | initialized = 1; |
| 157 | } |
| 158 | |
| 159 | if (IS_NULL(host)) { |
| 160 | JNU_ThrowNullPointerException(env, "host argument"); |
| 161 | return NULL; |
| 162 | } |
| 163 | hostname = JNU_GetStringPlatformChars(env, host, JNI_FALSE); |
| 164 | CHECK_NULL_RETURN(hostname, NULL); |
| 165 | |
| 166 | /* |
| 167 | * The NT/2000 resolver tolerates a space in front of localhost. This |
| 168 | * is not consistent with other implementations of gethostbyname. |
| 169 | * In addition we must do a white space check on Solaris to avoid a |
| 170 | * bug whereby 0.0.0.0 is returned if any host name has a white space. |
| 171 | */ |
| 172 | if (isspace(hostname[0])) { |
| 173 | JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException", hostname); |
| 174 | goto cleanupAndReturn; |
| 175 | } |
| 176 | |
| 177 | /* |
| 178 | * If the format is x.x.x.x then don't use gethostbyname as Windows |
| 179 | * is unable to handle octets which are out of range. |
| 180 | */ |
| 181 | if (isDottedIPAddress(hostname, &addr[0])) { |
| 182 | unsigned int address; |
| 183 | jobject iaObj; |
| 184 | |
| 185 | /* |
| 186 | * Are any of the octets out of range? |
| 187 | */ |
| 188 | if (addr[0] > 255 || addr[1] > 255 || addr[2] > 255 || addr[3] > 255) { |
| 189 | JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException", hostname); |
| 190 | goto cleanupAndReturn; |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * Return an byte array with the populated address. |
| 195 | */ |
| 196 | address = (addr[3]<<24) & 0xff000000; |
| 197 | address |= (addr[2]<<16) & 0xff0000; |
| 198 | address |= (addr[1]<<8) & 0xff00; |
| 199 | address |= addr[0]; |
| 200 | |
| 201 | ret = (*env)->NewObjectArray(env, 1, ni_iacls, NULL); |
| 202 | |
| 203 | if (IS_NULL(ret)) { |
| 204 | goto cleanupAndReturn; |
| 205 | } |
| 206 | |
| 207 | iaObj = (*env)->NewObject(env, ni_ia4cls, ni_ia4ctrID); |
| 208 | if (IS_NULL(iaObj)) { |
| 209 | ret = NULL; |
| 210 | goto cleanupAndReturn; |
| 211 | } |
| 212 | (*env)->SetIntField(env, iaObj, ni_iaaddressID, |
| 213 | ntohl(address)); |
| 214 | (*env)->SetObjectArrayElement(env, ret, 0, iaObj); |
| 215 | JNU_ReleaseStringPlatformChars(env, host, hostname); |
| 216 | return ret; |
| 217 | } |
| 218 | |
| 219 | /* |
| 220 | * Perform the lookup |
| 221 | */ |
| 222 | if ((hp = gethostbyname((char*)hostname)) != NULL) { |
| 223 | struct in_addr **addrp = (struct in_addr **) hp->h_addr_list; |
| 224 | int len = sizeof(struct in_addr); |
| 225 | int i = 0; |
| 226 | |
| 227 | while (*addrp != (struct in_addr *) 0) { |
| 228 | i++; |
| 229 | addrp++; |
| 230 | } |
| 231 | |
| 232 | name = (*env)->NewStringUTF(env, hostname); |
| 233 | if (IS_NULL(name)) { |
| 234 | goto cleanupAndReturn; |
| 235 | } |
| 236 | ret = (*env)->NewObjectArray(env, i, ni_iacls, NULL); |
| 237 | |
| 238 | if (IS_NULL(ret)) { |
| 239 | goto cleanupAndReturn; |
| 240 | } |
| 241 | |
| 242 | addrp = (struct in_addr **) hp->h_addr_list; |
| 243 | i = 0; |
| 244 | while (*addrp != (struct in_addr *) 0) { |
| 245 | jobject iaObj = (*env)->NewObject(env, ni_ia4cls, ni_ia4ctrID); |
| 246 | if (IS_NULL(iaObj)) { |
| 247 | ret = NULL; |
| 248 | goto cleanupAndReturn; |
| 249 | } |
| 250 | (*env)->SetIntField(env, iaObj, ni_iaaddressID, |
| 251 | ntohl((*addrp)->s_addr)); |
| 252 | (*env)->SetObjectField(env, iaObj, ni_iahostID, name); |
| 253 | (*env)->SetObjectArrayElement(env, ret, i, iaObj); |
| 254 | addrp++; |
| 255 | i++; |
| 256 | } |
| 257 | } else { |
| 258 | JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException", hostname); |
| 259 | } |
| 260 | |
| 261 | cleanupAndReturn: |
| 262 | JNU_ReleaseStringPlatformChars(env, host, hostname); |
| 263 | return ret; |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * Class: java_net_Inet4AddressImpl |
| 268 | * Method: getHostByAddr |
| 269 | * Signature: (I)Ljava/lang/String; |
| 270 | */ |
| 271 | JNIEXPORT jstring JNICALL |
| 272 | Java_java_net_Inet4AddressImpl_getHostByAddr(JNIEnv *env, jobject this, |
| 273 | jbyteArray addrArray) { |
| 274 | struct hostent *hp; |
| 275 | jbyte caddr[4]; |
| 276 | jint addr; |
| 277 | (*env)->GetByteArrayRegion(env, addrArray, 0, 4, caddr); |
| 278 | addr = ((caddr[0]<<24) & 0xff000000); |
| 279 | addr |= ((caddr[1] <<16) & 0xff0000); |
| 280 | addr |= ((caddr[2] <<8) & 0xff00); |
| 281 | addr |= (caddr[3] & 0xff); |
| 282 | addr = htonl(addr); |
| 283 | |
| 284 | hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET); |
| 285 | if (hp == NULL) { |
| 286 | JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException", 0); |
| 287 | return NULL; |
| 288 | } |
| 289 | if (hp->h_name == NULL) { /* Deal with bug in Windows XP */ |
| 290 | JNU_ThrowByName(env, JNU_JAVANETPKG "UnknownHostException", 0); |
| 291 | return NULL; |
| 292 | } |
| 293 | return JNU_NewStringPlatform(env, hp->h_name); |
| 294 | } |
| 295 | |
| 296 | |
| 297 | /** |
| 298 | * ping implementation. |
| 299 | * Send a ICMP_ECHO_REQUEST packet every second until either the timeout |
| 300 | * expires or a answer is received. |
| 301 | * Returns true is an ECHO_REPLY is received, otherwise, false. |
| 302 | */ |
| 303 | static jboolean |
| 304 | ping4(JNIEnv *env, jint fd, struct sockaddr_in* him, jint timeout, |
| 305 | struct sockaddr_in* netif, jint ttl) { |
| 306 | jint size; |
| 307 | jint n, len, hlen1, icmplen; |
| 308 | char sendbuf[1500]; |
| 309 | char recvbuf[1500]; |
| 310 | struct icmp *icmp; |
| 311 | struct ip *ip; |
| 312 | WSAEVENT hEvent; |
| 313 | struct sockaddr sa_recv; |
| 314 | jint tmout2; |
| 315 | u_short pid, seq; |
| 316 | int read_rv = 0; |
| 317 | |
| 318 | /* Initialize the sequence number to a suitable random number and |
| 319 | shift right one place to allow sufficient room for increamenting. */ |
| 320 | seq = ((unsigned short)rand()) >> 1; |
| 321 | |
| 322 | /* icmp_id is a 16 bit data type, therefore down cast the pid */ |
| 323 | pid = (u_short) getpid(); |
| 324 | size = 60*1024; |
| 325 | setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (const char *) &size, sizeof(size)); |
| 326 | /** |
| 327 | * A TTL was specified, let's set the socket option. |
| 328 | */ |
| 329 | if (ttl > 0) { |
| 330 | setsockopt(fd, IPPROTO_IP, IP_TTL, (const char *) &ttl, sizeof(ttl)); |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * A network interface was specified, let's bind to it. |
| 335 | */ |
| 336 | if (netif != NULL) { |
| 337 | if (bind(fd, (struct sockaddr*)netif, sizeof(struct sockaddr_in)) < 0) { |
| 338 | NET_ThrowNew(env, WSAGetLastError(), "Can't bind socket"); |
| 339 | closesocket(fd); |
| 340 | return JNI_FALSE; |
| 341 | } |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * Let's make the socket non blocking |
| 346 | */ |
| 347 | hEvent = WSACreateEvent(); |
| 348 | WSAEventSelect(fd, hEvent, FD_READ|FD_CONNECT|FD_CLOSE); |
| 349 | |
| 350 | /** |
| 351 | * send 1 ICMP REQUEST every second until either we get a valid reply |
| 352 | * or the timeout expired. |
| 353 | */ |
| 354 | do { |
| 355 | /** |
| 356 | * construct the ICMP header |
| 357 | */ |
| 358 | memset(sendbuf, 0, 1500); |
| 359 | icmp = (struct icmp *) sendbuf; |
| 360 | icmp->icmp_type = ICMP_ECHO; |
| 361 | icmp->icmp_code = 0; |
| 362 | icmp->icmp_id = htons(pid); |
| 363 | icmp->icmp_seq = htons(seq); |
| 364 | /** |
| 365 | * checksum has to be set to zero before we can calculate the |
| 366 | * real checksum! |
| 367 | */ |
| 368 | icmp->icmp_cksum = 0; |
| 369 | icmp->icmp_cksum = in_cksum((u_short *)icmp, 64); |
| 370 | /** |
| 371 | * Ping! |
| 372 | */ |
| 373 | n = sendto(fd, sendbuf, 64, 0, (struct sockaddr *)him, |
| 374 | sizeof(struct sockaddr)); |
| 375 | if (n < 0 && WSAGetLastError() != WSAEWOULDBLOCK) { |
| 376 | NET_ThrowNew(env, WSAGetLastError(), "Can't send ICMP packet"); |
| 377 | closesocket(fd); |
| 378 | WSACloseEvent(hEvent); |
| 379 | return JNI_FALSE; |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * wait for 1 second at most |
| 384 | */ |
| 385 | tmout2 = timeout > 1000 ? 1000 : timeout; |
| 386 | do { |
| 387 | tmout2 = NET_Wait(env, fd, NET_WAIT_READ, tmout2); |
| 388 | if (tmout2 >= 0) { |
| 389 | len = sizeof(sa_recv); |
| 390 | n = recvfrom(fd, recvbuf, sizeof(recvbuf), 0, &sa_recv, &len); |
| 391 | ip = (struct ip*) recvbuf; |
| 392 | hlen1 = (ip->ip_hl) << 2; |
| 393 | icmp = (struct icmp *) (recvbuf + hlen1); |
| 394 | icmplen = n - hlen1; |
| 395 | /** |
| 396 | * Is that a proper ICMP reply? |
| 397 | */ |
| 398 | if (icmplen >= 8 && icmp->icmp_type == ICMP_ECHOREPLY && |
| 399 | (ntohs(icmp->icmp_seq) == seq) && (ntohs(icmp->icmp_id) == pid)) { |
| 400 | closesocket(fd); |
| 401 | WSACloseEvent(hEvent); |
| 402 | return JNI_TRUE; |
| 403 | } |
| 404 | } |
| 405 | } while (tmout2 > 0); |
| 406 | timeout -= 1000; |
| 407 | seq++; |
| 408 | } while (timeout > 0); |
| 409 | closesocket(fd); |
| 410 | WSACloseEvent(hEvent); |
| 411 | return JNI_FALSE; |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * Class: java_net_Inet4AddressImpl |
| 416 | * Method: isReachable0 |
| 417 | * Signature: ([bI[bI)Z |
| 418 | */ |
| 419 | JNIEXPORT jboolean JNICALL |
| 420 | Java_java_net_Inet4AddressImpl_isReachable0(JNIEnv *env, jobject this, |
| 421 | jbyteArray addrArray, |
| 422 | jint timeout, |
| 423 | jbyteArray ifArray, |
| 424 | jint ttl) { |
| 425 | jint addr; |
| 426 | jbyte caddr[4]; |
| 427 | jint fd; |
| 428 | struct sockaddr_in him; |
| 429 | struct sockaddr_in* netif = NULL; |
| 430 | struct sockaddr_in inf; |
| 431 | int len = 0; |
| 432 | WSAEVENT hEvent; |
| 433 | int connect_rv = -1; |
| 434 | int sz; |
| 435 | |
| 436 | /** |
| 437 | * Convert IP address from byte array to integer |
| 438 | */ |
| 439 | sz = (*env)->GetArrayLength(env, addrArray); |
| 440 | if (sz != 4) { |
| 441 | return JNI_FALSE; |
| 442 | } |
| 443 | memset((char *) &him, 0, sizeof(him)); |
| 444 | memset((char *) caddr, 0, sizeof(caddr)); |
| 445 | (*env)->GetByteArrayRegion(env, addrArray, 0, 4, caddr); |
| 446 | addr = ((caddr[0]<<24) & 0xff000000); |
| 447 | addr |= ((caddr[1] <<16) & 0xff0000); |
| 448 | addr |= ((caddr[2] <<8) & 0xff00); |
| 449 | addr |= (caddr[3] & 0xff); |
| 450 | addr = htonl(addr); |
| 451 | /** |
| 452 | * Socket address |
| 453 | */ |
| 454 | him.sin_addr.s_addr = addr; |
| 455 | him.sin_family = AF_INET; |
| 456 | len = sizeof(him); |
| 457 | |
| 458 | /** |
| 459 | * If a network interface was specified, let's convert its address |
| 460 | * as well. |
| 461 | */ |
| 462 | if (!(IS_NULL(ifArray))) { |
| 463 | memset((char *) caddr, 0, sizeof(caddr)); |
| 464 | (*env)->GetByteArrayRegion(env, ifArray, 0, 4, caddr); |
| 465 | addr = ((caddr[0]<<24) & 0xff000000); |
| 466 | addr |= ((caddr[1] <<16) & 0xff0000); |
| 467 | addr |= ((caddr[2] <<8) & 0xff00); |
| 468 | addr |= (caddr[3] & 0xff); |
| 469 | addr = htonl(addr); |
| 470 | inf.sin_addr.s_addr = addr; |
| 471 | inf.sin_family = AF_INET; |
| 472 | inf.sin_port = 0; |
| 473 | netif = &inf; |
| 474 | } |
| 475 | |
| 476 | #if 0 |
| 477 | /* |
| 478 | * Windows implementation of ICMP & RAW sockets is too unreliable for now. |
| 479 | * Therefore it's best not to try it at all and rely only on TCP |
| 480 | * We may revisit and enable this code in the future. |
| 481 | */ |
| 482 | |
| 483 | /* |
| 484 | * Let's try to create a RAW socket to send ICMP packets |
| 485 | * This usually requires "root" privileges, so it's likely to fail. |
| 486 | */ |
| 487 | fd = NET_Socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); |
| 488 | if (fd != -1) { |
| 489 | /* |
| 490 | * It didn't fail, so we can use ICMP_ECHO requests. |
| 491 | */ |
| 492 | return ping4(env, fd, &him, timeout, netif, ttl); |
| 493 | } |
| 494 | #endif |
| 495 | |
| 496 | /* |
| 497 | * Can't create a raw socket, so let's try a TCP socket |
| 498 | */ |
| 499 | fd = NET_Socket(AF_INET, SOCK_STREAM, 0); |
| 500 | if (fd == JVM_IO_ERR) { |
| 501 | /* note: if you run out of fds, you may not be able to load |
| 502 | * the exception class, and get a NoClassDefFoundError |
| 503 | * instead. |
| 504 | */ |
| 505 | NET_ThrowNew(env, WSAGetLastError(), "Can't create socket"); |
| 506 | return JNI_FALSE; |
| 507 | } |
| 508 | if (ttl > 0) { |
| 509 | setsockopt(fd, IPPROTO_IP, IP_TTL, (const char *)&ttl, sizeof(ttl)); |
| 510 | } |
| 511 | /* |
| 512 | * A network interface was specified, so let's bind to it. |
| 513 | */ |
| 514 | if (netif != NULL) { |
| 515 | if (bind(fd, (struct sockaddr*)netif, sizeof(struct sockaddr_in)) < 0) { |
| 516 | NET_ThrowNew(env, WSAGetLastError(), "Can't bind socket"); |
| 517 | closesocket(fd); |
| 518 | return JNI_FALSE; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | /* |
| 523 | * Make the socket non blocking so we can use select/poll. |
| 524 | */ |
| 525 | hEvent = WSACreateEvent(); |
| 526 | WSAEventSelect(fd, hEvent, FD_READ|FD_CONNECT|FD_CLOSE); |
| 527 | |
| 528 | /* no need to use NET_Connect as non-blocking */ |
| 529 | him.sin_port = htons(7); /* Echo */ |
| 530 | connect_rv = connect(fd, (struct sockaddr *)&him, len); |
| 531 | |
| 532 | /** |
| 533 | * connection established or refused immediately, either way it means |
| 534 | * we were able to reach the host! |
| 535 | */ |
| 536 | if (connect_rv == 0 || WSAGetLastError() == WSAECONNREFUSED) { |
| 537 | WSACloseEvent(hEvent); |
| 538 | closesocket(fd); |
| 539 | return JNI_TRUE; |
| 540 | } else { |
| 541 | int optlen; |
| 542 | |
| 543 | switch (WSAGetLastError()) { |
| 544 | case WSAEHOSTUNREACH: /* Host Unreachable */ |
| 545 | case WSAENETUNREACH: /* Network Unreachable */ |
| 546 | case WSAENETDOWN: /* Network is down */ |
| 547 | case WSAEPFNOSUPPORT: /* Protocol Family unsupported */ |
| 548 | WSACloseEvent(hEvent); |
| 549 | closesocket(fd); |
| 550 | return JNI_FALSE; |
| 551 | } |
| 552 | |
| 553 | if (WSAGetLastError() != WSAEWOULDBLOCK) { |
| 554 | NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException", |
| 555 | "connect failed"); |
| 556 | WSACloseEvent(hEvent); |
| 557 | closesocket(fd); |
| 558 | return JNI_FALSE; |
| 559 | } |
| 560 | |
| 561 | timeout = NET_Wait(env, fd, NET_WAIT_CONNECT, timeout); |
| 562 | |
| 563 | /* has connection been established */ |
| 564 | |
| 565 | if (timeout >= 0) { |
| 566 | optlen = sizeof(connect_rv); |
| 567 | if (JVM_GetSockOpt(fd, SOL_SOCKET, SO_ERROR, (void*)&connect_rv, |
| 568 | &optlen) <0) { |
| 569 | connect_rv = WSAGetLastError(); |
| 570 | } |
| 571 | |
| 572 | if (connect_rv == 0 || connect_rv == WSAECONNREFUSED) { |
| 573 | WSACloseEvent(hEvent); |
| 574 | closesocket(fd); |
| 575 | return JNI_TRUE; |
| 576 | } |
| 577 | } |
| 578 | } |
| 579 | WSACloseEvent(hEvent); |
| 580 | closesocket(fd); |
| 581 | return JNI_FALSE; |
| 582 | } |