1 /* 2 * Copyright (c) 1997, 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 <string.h> 28 #include <sys/types.h> 29 #include <sys/socket.h> 30 #include <netinet/tcp.h> /* Defines TCP_NODELAY, needed for 2.6 */ 31 #include <netinet/in.h> 32 #include <net/if.h> 33 #include <netdb.h> 34 #include <stdlib.h> 35 #include <dlfcn.h> 36 37 #include <limits.h> 38 #include <sys/param.h> 39 #ifndef MAXINT 40 #define MAXINT INT_MAX 41 #endif 42 #ifdef __BIONIC__ 43 #include <linux/ipv6_route.h> 44 #endif 45 46 #ifdef __solaris__ 47 #include <sys/sockio.h> 48 #include <stropts.h> 49 #include <inet/nd.h> 50 #endif 51 52 #ifdef __linux__ 53 #include <arpa/inet.h> 54 #include <net/route.h> 55 #include <sys/utsname.h> 56 57 #ifndef IPV6_FLOWINFO_SEND 58 #define IPV6_FLOWINFO_SEND 33 59 #endif 60 61 #endif 62 63 #include "jni_util.h" 64 #include "jvm.h" 65 #include "net_util.h" 66 67 // Android-removed: unused 68 #if 0 69 #include "java_net_SocketOptions.h" 70 #endif 71 72 73 /* needed from libsocket on Solaris 8 */ 74 75 getaddrinfo_f getaddrinfo_ptr = NULL; 76 freeaddrinfo_f freeaddrinfo_ptr = NULL; 77 gai_strerror_f gai_strerror_ptr = NULL; 78 getnameinfo_f getnameinfo_ptr = NULL; 79 80 /* 81 * EXCLBIND socket options only on Solaris 82 */ 83 #if defined(__solaris__) && !defined(TCP_EXCLBIND) 84 #define TCP_EXCLBIND 0x21 85 #endif 86 #if defined(__solaris__) && !defined(UDP_EXCLBIND) 87 #define UDP_EXCLBIND 0x0101 88 #endif 89 90 // Android-removed: unused 91 #if 0 92 void setDefaultScopeID(JNIEnv *env, struct sockaddr *him) 93 { 94 #ifdef MACOSX 95 static jclass ni_class = NULL; 96 static jfieldID ni_defaultIndexID; 97 if (ni_class == NULL) { 98 jclass c = (*env)->FindClass(env, "java/net/NetworkInterface"); 99 CHECK_NULL(c); 100 c = (*env)->NewGlobalRef(env, c); 101 CHECK_NULL(c); 102 ni_defaultIndexID = (*env)->GetStaticFieldID( 103 env, c, "defaultIndex", "I"); 104 ni_class = c; 105 } 106 int defaultIndex; 107 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)him; 108 if (sin6->sin6_family == AF_INET6 && (sin6->sin6_scope_id == 0)) { 109 defaultIndex = (*env)->GetStaticIntField(env, ni_class, 110 ni_defaultIndexID); 111 sin6->sin6_scope_id = defaultIndex; 112 } 113 #endif 114 } 115 116 int getDefaultScopeID(JNIEnv *env) { 117 static jclass ni_class = NULL; 118 static jfieldID ni_defaultIndexID; 119 if (ni_class == NULL) { 120 jclass c = (*env)->FindClass(env, "java/net/NetworkInterface"); 121 if (c == NULL) return 0; 122 c = (*env)->NewGlobalRef(env, c); 123 if (c == NULL) return 0; 124 ni_defaultIndexID = (*env)->GetStaticFieldID( 125 env, c, "defaultIndex", "I"); 126 ni_class = c; 127 } 128 int defaultIndex = 0; 129 defaultIndex = (*env)->GetStaticIntField(env, ni_class, 130 ni_defaultIndexID); 131 return defaultIndex; 132 } 133 #endif 134 135 #ifdef __solaris__ 136 static int init_tcp_max_buf, init_udp_max_buf; 137 static int tcp_max_buf; 138 static int udp_max_buf; 139 static int useExclBind = 0; 140 141 /* 142 * Get the specified parameter from the specified driver. The value 143 * of the parameter is assumed to be an 'int'. If the parameter 144 * cannot be obtained return -1 145 */ 146 static int 147 getParam(char *driver, char *param) 148 { 149 struct strioctl stri; 150 char buf [64]; 151 int s; 152 int value; 153 154 s = open (driver, O_RDWR); 155 if (s < 0) { 156 return -1; 157 } 158 strncpy (buf, param, sizeof(buf)); 159 stri.ic_cmd = ND_GET; 160 stri.ic_timout = 0; 161 stri.ic_dp = buf; 162 stri.ic_len = sizeof(buf); 163 if (ioctl (s, I_STR, &stri) < 0) { 164 value = -1; 165 } else { 166 value = atoi(buf); 167 } 168 close (s); 169 return value; 170 } 171 172 /* 173 * Iterative way to find the max value that SO_SNDBUF or SO_RCVBUF 174 * for Solaris versions that do not support the ioctl() in getParam(). 175 * Ugly, but only called once (for each sotype). 176 * 177 * As an optimization, we make a guess using the default values for Solaris 178 * assuming they haven't been modified with ndd. 179 */ 180 181 #define MAX_TCP_GUESS 1024 * 1024 182 #define MAX_UDP_GUESS 2 * 1024 * 1024 183 184 #define FAIL_IF_NOT_ENOBUFS if (errno != ENOBUFS) return -1 185 186 static int findMaxBuf(int fd, int opt, int sotype) { 187 int a = 0; 188 int b = MAXINT; 189 int initial_guess; 190 int limit = -1; 191 192 if (sotype == SOCK_DGRAM) { 193 initial_guess = MAX_UDP_GUESS; 194 } else { 195 initial_guess = MAX_TCP_GUESS; 196 } 197 198 if (setsockopt(fd, SOL_SOCKET, opt, &initial_guess, sizeof(int)) == 0) { 199 initial_guess++; 200 if (setsockopt(fd, SOL_SOCKET, opt, &initial_guess,sizeof(int)) < 0) { 201 FAIL_IF_NOT_ENOBUFS; 202 return initial_guess - 1; 203 } 204 a = initial_guess; 205 } else { 206 FAIL_IF_NOT_ENOBUFS; 207 b = initial_guess - 1; 208 } 209 do { 210 int mid = a + (b-a)/2; 211 if (setsockopt(fd, SOL_SOCKET, opt, &mid, sizeof(int)) == 0) { 212 limit = mid; 213 a = mid + 1; 214 } else { 215 FAIL_IF_NOT_ENOBUFS; 216 b = mid - 1; 217 } 218 } while (b >= a); 219 220 return limit; 221 } 222 #endif 223 224 #ifdef __linux__ 225 static int vinit = 0; 226 227 static int kernelV24 = 0; 228 static int vinit24 = 0; 229 230 int kernelIsV24 () { 231 if (!vinit24) { 232 struct utsname sysinfo; 233 if (uname(&sysinfo) == 0) { 234 sysinfo.release[3] = '\0'; 235 if (strcmp(sysinfo.release, "2.4") == 0) { 236 kernelV24 = JNI_TRUE; 237 } 238 } 239 vinit24 = 1; 240 } 241 return kernelV24; 242 } 243 244 int getScopeID (struct sockaddr *him) { 245 struct sockaddr_in6 *hext = (struct sockaddr_in6 *)him; 246 return hext->sin6_scope_id; 247 } 248 249 int cmpScopeID (unsigned int scope, struct sockaddr *him) { 250 struct sockaddr_in6 *hext = (struct sockaddr_in6 *)him; 251 return hext->sin6_scope_id == scope; 252 } 253 254 #else 255 256 int getScopeID (struct sockaddr *him) { 257 struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; 258 return him6->sin6_scope_id; 259 } 260 261 int cmpScopeID (unsigned int scope, struct sockaddr *him) { 262 struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; 263 return him6->sin6_scope_id == scope; 264 } 265 266 #endif 267 268 269 void 270 NET_ThrowByNameWithLastError(JNIEnv *env, const char *name, 271 const char *defaultDetail) { 272 char errmsg[255]; 273 snprintf(errmsg, sizeof(errmsg), "errno: %d, error: %s\n", errno, 274 defaultDetail); 275 JNU_ThrowByNameWithLastError(env, name, errmsg); 276 } 277 278 void 279 NET_ThrowCurrent(JNIEnv *env, char *msg) { 280 NET_ThrowNew(env, errno, msg); 281 } 282 283 void 284 NET_ThrowNew(JNIEnv *env, int errorNumber, char *msg) { 285 char fullMsg[512]; 286 if (!msg) { 287 msg = "no further information"; 288 } 289 switch(errorNumber) { 290 case EBADF: 291 jio_snprintf(fullMsg, sizeof(fullMsg), "socket closed: %s", msg); 292 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", fullMsg); 293 break; 294 case EINTR: 295 JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException", msg); 296 break; 297 default: 298 errno = errorNumber; 299 JNU_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", msg); 300 break; 301 } 302 } 303 304 305 jfieldID 306 NET_GetFileDescriptorID(JNIEnv *env) 307 { 308 jclass cls = (*env)->FindClass(env, "java/io/FileDescriptor"); 309 CHECK_NULL_RETURN(cls, NULL); 310 return (*env)->GetFieldID(env, cls, "descriptor", "I"); 311 } 312 313 #if defined(DONT_ENABLE_IPV6) 314 jint IPv6_supported() 315 { 316 return JNI_FALSE; 317 } 318 319 #else /* !DONT_ENABLE_IPV6 */ 320 321 jint IPv6_supported() 322 { 323 #ifndef AF_INET6 324 return JNI_FALSE; 325 #endif 326 327 #ifdef AF_INET6 328 int fd; 329 void *ipv6_fn; 330 SOCKADDR sa; 331 socklen_t sa_len = sizeof(sa); 332 333 // This one below is problematic, will fail without proper permissions 334 // and report no ipv6 for some and ipv6 for others. 335 //fd = JVM_Socket(AF_INET6, SOCK_STREAM, 0) ; 336 //if (fd < 0) { 337 /* 338 * TODO: We really cant tell since it may be an unrelated error 339 * for now we will assume that AF_INET6 is not available 340 */ 341 // return JNI_FALSE; 342 //} 343 344 /* 345 * If fd 0 is a socket it means we've been launched from inetd or 346 * xinetd. If it's a socket then check the family - if it's an 347 * IPv4 socket then we need to disable IPv6. 348 */ 349 /*if (getsockname(0, (struct sockaddr *)&sa, &sa_len) == 0) { 350 struct sockaddr *saP = (struct sockaddr *)&sa; 351 if (saP->sa_family != AF_INET6) { 352 return JNI_FALSE; 353 } 354 }*/ 355 356 /** 357 * Linux - check if any interface has an IPv6 address. 358 * Don't need to parse the line - we just need an indication. 359 */ 360 #ifdef __linux__ 361 /* { 362 FILE *fP = fopen("/proc/net/if_inet6", "r"); 363 char buf[255]; 364 char *bufP; 365 366 if (fP == NULL) { 367 close(fd); 368 return JNI_FALSE; 369 } 370 bufP = fgets(buf, sizeof(buf), fP); 371 fclose(fP); 372 if (bufP == NULL) { 373 close(fd); 374 return JNI_FALSE; 375 } 376 }*/ 377 #endif 378 379 /** 380 * On Solaris 8 it's possible to create INET6 sockets even 381 * though IPv6 is not enabled on all interfaces. Thus we 382 * query the number of IPv6 addresses to verify that IPv6 383 * has been configured on at least one interface. 384 * 385 * On Linux it doesn't matter - if IPv6 is built-in the 386 * kernel then IPv6 addresses will be bound automatically 387 * to all interfaces. 388 */ 389 #ifdef __solaris__ 390 391 #ifdef SIOCGLIFNUM 392 { 393 struct lifnum numifs; 394 395 numifs.lifn_family = AF_INET6; 396 numifs.lifn_flags = 0; 397 if (ioctl(fd, SIOCGLIFNUM, (char *)&numifs) < 0) { 398 /** 399 * SIOCGLIFNUM failed - assume IPv6 not configured 400 */ 401 close(fd); 402 return JNI_FALSE; 403 } 404 /** 405 * If no IPv6 addresses then return false. If count > 0 406 * it's possible that all IPv6 addresses are "down" but 407 * that's okay as they may be brought "up" while the 408 * VM is running. 409 */ 410 if (numifs.lifn_count == 0) { 411 close(fd); 412 return JNI_FALSE; 413 } 414 } 415 #else 416 /* SIOCGLIFNUM not defined in build environment ??? */ 417 close(fd); 418 return JNI_FALSE; 419 #endif 420 421 #endif /* __solaris */ 422 423 /* 424 * OK we may have the stack available in the kernel, 425 * we should also check if the APIs are available. 426 */ 427 428 ipv6_fn = JVM_FindLibraryEntry(RTLD_DEFAULT, "inet_pton"); 429 if (ipv6_fn == NULL ) { 430 // close(fd); 431 return JNI_FALSE; 432 } 433 434 /* 435 * We've got the library, let's get the pointers to some 436 * IPV6 specific functions. We have to do that because, at least 437 * on Solaris we may build on a system without IPV6 networking 438 * libraries, therefore we can't have a hard link to these 439 * functions. 440 */ 441 getaddrinfo_ptr = (getaddrinfo_f) 442 JVM_FindLibraryEntry(RTLD_DEFAULT, "getaddrinfo"); 443 444 freeaddrinfo_ptr = (freeaddrinfo_f) 445 JVM_FindLibraryEntry(RTLD_DEFAULT, "freeaddrinfo"); 446 447 gai_strerror_ptr = (gai_strerror_f) 448 JVM_FindLibraryEntry(RTLD_DEFAULT, "gai_strerror"); 449 450 getnameinfo_ptr = (getnameinfo_f) 451 JVM_FindLibraryEntry(RTLD_DEFAULT, "getnameinfo"); 452 453 if (freeaddrinfo_ptr == NULL || getnameinfo_ptr == NULL) { 454 /* We need all 3 of them */ 455 getaddrinfo_ptr = NULL; 456 } 457 458 //close(fd); 459 return JNI_TRUE; 460 #endif /* AF_INET6 */ 461 } 462 #endif /* DONT_ENABLE_IPV6 */ 463 464 void ThrowUnknownHostExceptionWithGaiError(JNIEnv *env, 465 const char* hostname, 466 int gai_error) 467 { 468 int size; 469 char *buf; 470 const char *format = "%s: %s"; 471 const char *error_string = 472 (gai_strerror_ptr == NULL) ? NULL : (*gai_strerror_ptr)(gai_error); 473 if (error_string == NULL) 474 error_string = "unknown error"; 475 476 size = strlen(format) + strlen(hostname) + strlen(error_string) + 2; 477 buf = (char *) malloc(size); 478 if (buf) { 479 jstring s; 480 snprintf(buf, size, format, hostname, error_string); 481 s = JNU_NewStringPlatform(env, buf); 482 if (s != NULL) { 483 jobject x = JNU_NewObjectByName(env, 484 "java/net/UnknownHostException", 485 "(Ljava/lang/String;)V", s); 486 if (x != NULL) 487 (*env)->Throw(env, x); 488 } 489 free(buf); 490 } 491 } 492 493 void 494 NET_AllocSockaddr(struct sockaddr **him, int *len) { 495 #ifdef AF_INET6 496 if (ipv6_available()) { 497 struct sockaddr_in6 *him6 = (struct sockaddr_in6*)malloc(sizeof(struct sockaddr_in6)); 498 *him = (struct sockaddr*)him6; 499 *len = sizeof(struct sockaddr_in6); 500 } else 501 #endif /* AF_INET6 */ 502 { 503 struct sockaddr_in *him4 = (struct sockaddr_in*)malloc(sizeof(struct sockaddr_in)); 504 *him = (struct sockaddr*)him4; 505 *len = sizeof(struct sockaddr_in); 506 } 507 } 508 509 #if 0 510 // Android-changed: Stripped out unused code. http://b/33250070 511 // #if defined(__linux__) && defined(AF_INET6) 512 513 514 /* following code creates a list of addresses from the kernel 515 * routing table that are routed via the loopback address. 516 * We check all destination addresses against this table 517 * and override the scope_id field to use the relevant value for "lo" 518 * in order to work-around the Linux bug that prevents packets destined 519 * for certain local addresses from being sent via a physical interface. 520 */ 521 522 struct loopback_route { 523 struct in6_addr addr; /* destination address */ 524 int plen; /* prefix length */ 525 }; 526 527 static struct loopback_route *loRoutes = 0; 528 static int nRoutes = 0; /* number of routes */ 529 static int loRoutes_size = 16; /* initial size */ 530 static int lo_scope_id = 0; 531 532 static void initLoopbackRoutes(); 533 534 void printAddr (struct in6_addr *addr) { 535 int i; 536 for (i=0; i<16; i++) { 537 printf ("%02x", addr->s6_addr[i]); 538 } 539 printf ("\n"); 540 } 541 542 static void initLoopbackRoutes() { 543 FILE *f; 544 char srcp[8][5]; 545 char hopp[8][5]; 546 int dest_plen, src_plen, use, refcnt, metric; 547 unsigned long flags; 548 char dest_str[40]; 549 struct in6_addr dest_addr; 550 char device[16]; 551 552 if (loRoutes != 0) { 553 free (loRoutes); 554 } 555 loRoutes = calloc (loRoutes_size, sizeof(struct loopback_route)); 556 if (loRoutes == 0) { 557 return; 558 } 559 /* 560 * Scan /proc/net/ipv6_route looking for a matching 561 * route. 562 */ 563 if ((f = fopen("/proc/net/ipv6_route", "r")) == NULL) { 564 return ; 565 } 566 while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x " 567 "%4s%4s%4s%4s%4s%4s%4s%4s %02x " 568 "%4s%4s%4s%4s%4s%4s%4s%4s " 569 "%08x %08x %08x %08lx %8s", 570 dest_str, &dest_str[5], &dest_str[10], &dest_str[15], 571 &dest_str[20], &dest_str[25], &dest_str[30], &dest_str[35], 572 &dest_plen, 573 srcp[0], srcp[1], srcp[2], srcp[3], 574 srcp[4], srcp[5], srcp[6], srcp[7], 575 &src_plen, 576 hopp[0], hopp[1], hopp[2], hopp[3], 577 hopp[4], hopp[5], hopp[6], hopp[7], 578 &metric, &use, &refcnt, &flags, device) == 31) { 579 580 /* 581 * Some routes should be ignored 582 */ 583 if ( (dest_plen < 0 || dest_plen > 128) || 584 (src_plen != 0) || 585 (flags & (RTF_POLICY | RTF_FLOW)) || 586 ((flags & RTF_REJECT) && dest_plen == 0) ) { 587 continue; 588 } 589 590 /* 591 * Convert the destination address 592 */ 593 dest_str[4] = ':'; 594 dest_str[9] = ':'; 595 dest_str[14] = ':'; 596 dest_str[19] = ':'; 597 dest_str[24] = ':'; 598 dest_str[29] = ':'; 599 dest_str[34] = ':'; 600 dest_str[39] = '\0'; 601 602 if (inet_pton(AF_INET6, dest_str, &dest_addr) < 0) { 603 /* not an Ipv6 address */ 604 continue; 605 } 606 if (strcmp(device, "lo") != 0) { 607 /* Not a loopback route */ 608 continue; 609 } else { 610 if (nRoutes == loRoutes_size) { 611 loRoutes = realloc (loRoutes, loRoutes_size * 612 sizeof (struct loopback_route) * 2); 613 if (loRoutes == 0) { 614 return ; 615 } 616 loRoutes_size *= 2; 617 } 618 memcpy (&loRoutes[nRoutes].addr,&dest_addr,sizeof(struct in6_addr)); 619 loRoutes[nRoutes].plen = dest_plen; 620 nRoutes ++; 621 } 622 } 623 624 fclose (f); 625 { 626 /* now find the scope_id for "lo" */ 627 628 char devname[21]; 629 char addr6p[8][5]; 630 int plen, scope, dad_status, if_idx; 631 632 if ((f = fopen("/proc/net/if_inet6", "r")) != NULL) { 633 while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x %02x %02x %02x %20s\n", 634 addr6p[0], addr6p[1], addr6p[2], addr6p[3], 635 addr6p[4], addr6p[5], addr6p[6], addr6p[7], 636 &if_idx, &plen, &scope, &dad_status, devname) == 13) { 637 638 if (strcmp(devname, "lo") == 0) { 639 /* 640 * Found - so just return the index 641 */ 642 fclose(f); 643 lo_scope_id = if_idx; 644 return; 645 } 646 } 647 fclose(f); 648 } 649 } 650 } 651 652 /* 653 * Following is used for binding to local addresses. Equivalent 654 * to code above, for bind(). 655 */ 656 657 struct localinterface { 658 int index; 659 char localaddr [16]; 660 }; 661 662 static struct localinterface *localifs = 0; 663 static int localifsSize = 0; /* size of array */ 664 static int nifs = 0; /* number of entries used in array */ 665 666 /* not thread safe: make sure called once from one thread */ 667 668 static void initLocalIfs () { 669 FILE *f; 670 unsigned char staddr [16]; 671 char ifname [33]; 672 struct localinterface *lif=0; 673 int index, x1, x2, x3; 674 unsigned int u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,ua,ub,uc,ud,ue,uf; 675 676 if ((f = fopen("/proc/net/if_inet6", "r")) == NULL) { 677 return ; 678 } 679 while (fscanf (f, "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x " 680 "%d %x %x %x %32s",&u0,&u1,&u2,&u3,&u4,&u5,&u6,&u7, 681 &u8,&u9,&ua,&ub,&uc,&ud,&ue,&uf, 682 &index, &x1, &x2, &x3, ifname) == 21) { 683 staddr[0] = (unsigned char)u0; 684 staddr[1] = (unsigned char)u1; 685 staddr[2] = (unsigned char)u2; 686 staddr[3] = (unsigned char)u3; 687 staddr[4] = (unsigned char)u4; 688 staddr[5] = (unsigned char)u5; 689 staddr[6] = (unsigned char)u6; 690 staddr[7] = (unsigned char)u7; 691 staddr[8] = (unsigned char)u8; 692 staddr[9] = (unsigned char)u9; 693 staddr[10] = (unsigned char)ua; 694 staddr[11] = (unsigned char)ub; 695 staddr[12] = (unsigned char)uc; 696 staddr[13] = (unsigned char)ud; 697 staddr[14] = (unsigned char)ue; 698 staddr[15] = (unsigned char)uf; 699 nifs ++; 700 if (nifs > localifsSize) { 701 localifs = (struct localinterface *) realloc ( 702 localifs, sizeof (struct localinterface)* (localifsSize+5)); 703 if (localifs == 0) { 704 nifs = 0; 705 fclose (f); 706 return; 707 } 708 lif = localifs + localifsSize; 709 localifsSize += 5; 710 } else { 711 lif ++; 712 } 713 memcpy (lif->localaddr, staddr, 16); 714 lif->index = index; 715 } 716 fclose (f); 717 } 718 719 void initLocalAddrTable () { 720 initLoopbackRoutes(); 721 initLocalIfs(); 722 } 723 724 #else 725 726 void initLocalAddrTable () {} 727 728 #endif 729 730 void parseExclusiveBindProperty(JNIEnv *env) { 731 #ifdef __solaris__ 732 jstring s, flagSet; 733 jclass iCls; 734 jmethodID mid; 735 736 s = (*env)->NewStringUTF(env, "sun.net.useExclusiveBind"); 737 CHECK_NULL(s); 738 iCls = (*env)->FindClass(env, "java/lang/System"); 739 CHECK_NULL(iCls); 740 mid = (*env)->GetStaticMethodID(env, iCls, "getProperty", 741 "(Ljava/lang/String;)Ljava/lang/String;"); 742 CHECK_NULL(mid); 743 flagSet = (*env)->CallStaticObjectMethod(env, iCls, mid, s); 744 if (flagSet != NULL) { 745 useExclBind = 1; 746 } 747 #endif 748 } 749 /* In the case of an IPv4 Inetaddress this method will return an 750 * IPv4 mapped address where IPv6 is available and v4MappedAddress is TRUE. 751 * Otherwise it will return a sockaddr_in structure for an IPv4 InetAddress. 752 */ 753 JNIEXPORT int JNICALL 754 NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port, struct sockaddr *him, 755 int *len, jboolean v4MappedAddress) { 756 jint family; 757 family = getInetAddress_family(env, iaObj); 758 #ifdef AF_INET6 759 /* needs work. 1. family 2. clean up him6 etc deallocate memory */ 760 if (ipv6_available() && !(family == IPv4 && v4MappedAddress == JNI_FALSE)) { 761 struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; 762 jbyteArray ipaddress; 763 jbyte caddr[16]; 764 jint address; 765 766 767 if (family == IPv4) { /* will convert to IPv4-mapped address */ 768 memset((char *) caddr, 0, 16); 769 address = getInetAddress_addr(env, iaObj); 770 if (address == INADDR_ANY) { 771 /* we would always prefer IPv6 wildcard address 772 caddr[10] = 0xff; 773 caddr[11] = 0xff; */ 774 } else { 775 caddr[10] = 0xff; 776 caddr[11] = 0xff; 777 caddr[12] = ((address >> 24) & 0xff); 778 caddr[13] = ((address >> 16) & 0xff); 779 caddr[14] = ((address >> 8) & 0xff); 780 caddr[15] = (address & 0xff); 781 } 782 } else { 783 getInet6Address_ipaddress(env, iaObj, (char *)caddr); 784 } 785 memset((char *)him6, 0, sizeof(struct sockaddr_in6)); 786 him6->sin6_port = htons(port); 787 memcpy((void *)&(him6->sin6_addr), caddr, sizeof(struct in6_addr) ); 788 him6->sin6_family = AF_INET6; 789 *len = sizeof(struct sockaddr_in6) ; 790 791 #if defined(_ALLBSD_SOURCE) && defined(_AF_INET6) 792 // XXXBSD: should we do something with scope id here ? see below linux comment 793 /* MMM: Come back to this! */ 794 #endif 795 796 // Android-changed: Don't try and figure out scope_ids for link local 797 // addresses. Use them only if they're set in java (say, if the Inet6Address 798 // was constructed with a specific scope_id or NetworkInterface). 799 if (family != IPv4) { 800 if (ia6_scopeidID) { 801 int scope_id = getInet6Address_scopeid(env, iaObj); 802 if (scope_id > 0) { 803 him6->sin6_scope_id = scope_id; 804 } 805 } 806 } 807 } else 808 #endif /* AF_INET6 */ 809 { 810 struct sockaddr_in *him4 = (struct sockaddr_in*)him; 811 jint address; 812 if (family == IPv6) { 813 JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Protocol family unavailable"); 814 return -1; 815 } 816 memset((char *) him4, 0, sizeof(struct sockaddr_in)); 817 address = getInetAddress_addr(env, iaObj); 818 him4->sin_port = htons((short) port); 819 him4->sin_addr.s_addr = (uint32_t) htonl(address); 820 him4->sin_family = AF_INET; 821 *len = sizeof(struct sockaddr_in); 822 } 823 return 0; 824 } 825 826 // Android-removed: unused 827 #if 0 828 void 829 NET_SetTrafficClass(struct sockaddr *him, int trafficClass) { 830 #ifdef AF_INET6 831 if (him->sa_family == AF_INET6) { 832 struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; 833 him6->sin6_flowinfo = htonl((trafficClass & 0xff) << 20); 834 } 835 #endif /* AF_INET6 */ 836 } 837 #endif 838 839 JNIEXPORT jint JNICALL 840 NET_GetPortFromSockaddr(struct sockaddr *him) { 841 #ifdef AF_INET6 842 if (him->sa_family == AF_INET6) { 843 return ntohs(((struct sockaddr_in6*)him)->sin6_port); 844 845 } else 846 #endif /* AF_INET6 */ 847 { 848 return ntohs(((struct sockaddr_in*)him)->sin_port); 849 } 850 } 851 852 int 853 NET_IsIPv4Mapped(jbyte* caddr) { 854 int i; 855 for (i = 0; i < 10; i++) { 856 if (caddr[i] != 0x00) { 857 return 0; /* false */ 858 } 859 } 860 861 if (((caddr[10] & 0xff) == 0xff) && ((caddr[11] & 0xff) == 0xff)) { 862 return 1; /* true */ 863 } 864 return 0; /* false */ 865 } 866 867 int 868 NET_IPv4MappedToIPv4(jbyte* caddr) { 869 return ((caddr[12] & 0xff) << 24) | ((caddr[13] & 0xff) << 16) | ((caddr[14] & 0xff) << 8) 870 | (caddr[15] & 0xff); 871 } 872 873 int 874 NET_IsEqual(jbyte* caddr1, jbyte* caddr2) { 875 int i; 876 for (i = 0; i < 16; i++) { 877 if (caddr1[i] != caddr2[i]) { 878 return 0; /* false */ 879 } 880 } 881 return 1; 882 } 883 884 jboolean NET_addrtransAvailable() { 885 return (jboolean)(getaddrinfo_ptr != NULL); 886 } 887 888 // Android-removed: unused 889 #if 0 890 int NET_IsZeroAddr(jbyte* caddr) { 891 int i; 892 for (i = 0; i < 16; i++) { 893 if (caddr[i] != 0) { 894 return 0; 895 } 896 } 897 return 1; 898 } 899 #endif 900 901 // Android-removed: unused 902 #if 0 903 /* 904 * Map the Java level socket option to the platform specific 905 * level and option name. 906 */ 907 int 908 NET_MapSocketOption(jint cmd, int *level, int *optname) { 909 static struct { 910 jint cmd; 911 int level; 912 int optname; 913 } const opts[] = { 914 { java_net_SocketOptions_TCP_NODELAY, IPPROTO_TCP, TCP_NODELAY }, 915 { java_net_SocketOptions_SO_OOBINLINE, SOL_SOCKET, SO_OOBINLINE }, 916 { java_net_SocketOptions_SO_LINGER, SOL_SOCKET, SO_LINGER }, 917 { java_net_SocketOptions_SO_SNDBUF, SOL_SOCKET, SO_SNDBUF }, 918 { java_net_SocketOptions_SO_RCVBUF, SOL_SOCKET, SO_RCVBUF }, 919 { java_net_SocketOptions_SO_KEEPALIVE, SOL_SOCKET, SO_KEEPALIVE }, 920 { java_net_SocketOptions_SO_REUSEADDR, SOL_SOCKET, SO_REUSEADDR }, 921 { java_net_SocketOptions_SO_BROADCAST, SOL_SOCKET, SO_BROADCAST }, 922 { java_net_SocketOptions_IP_TOS, IPPROTO_IP, IP_TOS }, 923 { java_net_SocketOptions_IP_MULTICAST_IF, IPPROTO_IP, IP_MULTICAST_IF }, 924 { java_net_SocketOptions_IP_MULTICAST_IF2, IPPROTO_IP, IP_MULTICAST_IF }, 925 { java_net_SocketOptions_IP_MULTICAST_LOOP, IPPROTO_IP, IP_MULTICAST_LOOP }, 926 }; 927 928 int i; 929 930 #ifdef AF_INET6 931 if (ipv6_available()) { 932 switch (cmd) { 933 // Different multicast options if IPv6 is enabled 934 case java_net_SocketOptions_IP_MULTICAST_IF: 935 case java_net_SocketOptions_IP_MULTICAST_IF2: 936 *level = IPPROTO_IPV6; 937 *optname = IPV6_MULTICAST_IF; 938 return 0; 939 940 case java_net_SocketOptions_IP_MULTICAST_LOOP: 941 *level = IPPROTO_IPV6; 942 *optname = IPV6_MULTICAST_LOOP; 943 return 0; 944 #if (defined(__solaris__) || defined(MACOSX)) 945 // Map IP_TOS request to IPV6_TCLASS 946 case java_net_SocketOptions_IP_TOS: 947 *level = IPPROTO_IPV6; 948 *optname = IPV6_TCLASS; 949 return 0; 950 #endif 951 } 952 } 953 #endif 954 955 /* 956 * Map the Java level option to the native level 957 */ 958 for (i=0; i<(int)(sizeof(opts) / sizeof(opts[0])); i++) { 959 if (cmd == opts[i].cmd) { 960 *level = opts[i].level; 961 *optname = opts[i].optname; 962 return 0; 963 } 964 } 965 966 /* not found */ 967 return -1; 968 } 969 #endif 970 971 /* 972 * Wrapper for getsockopt system routine - does any necessary 973 * pre/post processing to deal with OS specific oddities :- 974 * 975 * On Linux the SO_SNDBUF/SO_RCVBUF values must be post-processed 976 * to compensate for an incorrect value returned by the kernel. 977 */ 978 int 979 NET_GetSockOpt(int fd, int level, int opt, void *result, 980 int *len) 981 { 982 int rv; 983 984 #ifdef __solaris__ 985 rv = getsockopt(fd, level, opt, result, len); 986 #else 987 { 988 socklen_t socklen = *len; 989 rv = getsockopt(fd, level, opt, result, &socklen); 990 *len = socklen; 991 } 992 #endif 993 994 if (rv < 0) { 995 return rv; 996 } 997 998 #ifdef __linux__ 999 /* 1000 * On Linux SO_SNDBUF/SO_RCVBUF aren't symmetric. This 1001 * stems from additional socket structures in the send 1002 * and receive buffers. 1003 */ 1004 if ((level == SOL_SOCKET) && ((opt == SO_SNDBUF) 1005 || (opt == SO_RCVBUF))) { 1006 int n = *((int *)result); 1007 n /= 2; 1008 *((int *)result) = n; 1009 } 1010 #endif 1011 1012 /* Workaround for Mac OS treating linger value as 1013 * signed integer 1014 */ 1015 #ifdef MACOSX 1016 if (level == SOL_SOCKET && opt == SO_LINGER) { 1017 struct linger* to_cast = (struct linger*)result; 1018 to_cast->l_linger = (unsigned short)to_cast->l_linger; 1019 } 1020 #endif 1021 return rv; 1022 } 1023 1024 /* 1025 * Wrapper for setsockopt system routine - performs any 1026 * necessary pre/post processing to deal with OS specific 1027 * issue :- 1028 * 1029 * On Solaris need to limit the suggested value for SO_SNDBUF 1030 * and SO_RCVBUF to the kernel configured limit 1031 * 1032 * For IP_TOS socket option need to mask off bits as this 1033 * aren't automatically masked by the kernel and results in 1034 * an error. 1035 */ 1036 int 1037 NET_SetSockOpt(int fd, int level, int opt, const void *arg, 1038 int len) 1039 { 1040 #ifndef IPTOS_TOS_MASK 1041 #define IPTOS_TOS_MASK 0x1e 1042 #endif 1043 #ifndef IPTOS_PREC_MASK 1044 #define IPTOS_PREC_MASK 0xe0 1045 #endif 1046 1047 #if defined(_ALLBSD_SOURCE) 1048 #if defined(KIPC_MAXSOCKBUF) 1049 int mib[3]; 1050 size_t rlen; 1051 #endif 1052 1053 int *bufsize; 1054 1055 #ifdef __APPLE__ 1056 static int maxsockbuf = -1; 1057 #else 1058 static long maxsockbuf = -1; 1059 #endif 1060 #endif 1061 1062 /* 1063 * IPPROTO/IP_TOS :- 1064 * 1. IPv6 on Solaris/Mac OS: 1065 * Set the TOS OR Traffic Class value to cater for 1066 * IPv6 and IPv4 scenarios. 1067 * 2. IPv6 on Linux: By default Linux ignores flowinfo 1068 * field so enable IPV6_FLOWINFO_SEND so that flowinfo 1069 * will be examined. We also set the IPv4 TOS option in this case. 1070 * 3. IPv4: set socket option based on ToS and Precedence 1071 * fields (otherwise get invalid argument) 1072 */ 1073 if (level == IPPROTO_IP && opt == IP_TOS) { 1074 int *iptos; 1075 1076 #if defined(AF_INET6) && defined(__linux__) 1077 if (ipv6_available()) { 1078 int optval = 1; 1079 if (setsockopt(fd, IPPROTO_IPV6, IPV6_FLOWINFO_SEND, 1080 (void *)&optval, sizeof(optval)) < 0) { 1081 return -1; 1082 } 1083 /* 1084 * Let's also set the IPV6_TCLASS flag. 1085 * Linux appears to allow both IP_TOS and IPV6_TCLASS to be set 1086 * This helps in mixed environments where IPv4 and IPv6 sockets 1087 * are connecting. 1088 */ 1089 if (setsockopt(fd, IPPROTO_IPV6, IPV6_TCLASS, 1090 arg, len) < 0) { 1091 return -1; 1092 } 1093 } 1094 #endif 1095 1096 iptos = (int *)arg; 1097 // Android-changed: This is out-dated RFC 1349 scheme. Modern Linux uses 1098 // Diffsev/ECN, and this mask is no longer relavant. 1099 // *iptos &= (IPTOS_TOS_MASK | IPTOS_PREC_MASK); 1100 } 1101 1102 /* 1103 * SOL_SOCKET/{SO_SNDBUF,SO_RCVBUF} - On Solaris we may need to clamp 1104 * the value when it exceeds the system limit. 1105 */ 1106 #ifdef __solaris__ 1107 if (level == SOL_SOCKET) { 1108 if (opt == SO_SNDBUF || opt == SO_RCVBUF) { 1109 int sotype=0, arglen; 1110 int *bufsize, maxbuf; 1111 int ret; 1112 1113 /* Attempt with the original size */ 1114 ret = setsockopt(fd, level, opt, arg, len); 1115 if ((ret == 0) || (ret == -1 && errno != ENOBUFS)) 1116 return ret; 1117 1118 /* Exceeded system limit so clamp and retry */ 1119 1120 arglen = sizeof(sotype); 1121 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *)&sotype, 1122 &arglen) < 0) { 1123 return -1; 1124 } 1125 1126 /* 1127 * We try to get tcp_maxbuf (and udp_max_buf) using 1128 * an ioctl() that isn't available on all versions of Solaris. 1129 * If that fails, we use the search algorithm in findMaxBuf() 1130 */ 1131 if (!init_tcp_max_buf && sotype == SOCK_STREAM) { 1132 tcp_max_buf = getParam("/dev/tcp", "tcp_max_buf"); 1133 if (tcp_max_buf == -1) { 1134 tcp_max_buf = findMaxBuf(fd, opt, SOCK_STREAM); 1135 if (tcp_max_buf == -1) { 1136 return -1; 1137 } 1138 } 1139 init_tcp_max_buf = 1; 1140 } else if (!init_udp_max_buf && sotype == SOCK_DGRAM) { 1141 udp_max_buf = getParam("/dev/udp", "udp_max_buf"); 1142 if (udp_max_buf == -1) { 1143 udp_max_buf = findMaxBuf(fd, opt, SOCK_DGRAM); 1144 if (udp_max_buf == -1) { 1145 return -1; 1146 } 1147 } 1148 init_udp_max_buf = 1; 1149 } 1150 1151 maxbuf = (sotype == SOCK_STREAM) ? tcp_max_buf : udp_max_buf; 1152 bufsize = (int *)arg; 1153 if (*bufsize > maxbuf) { 1154 *bufsize = maxbuf; 1155 } 1156 } 1157 } 1158 #endif 1159 1160 /* 1161 * On Linux the receive buffer is used for both socket 1162 * structures and the the packet payload. The implication 1163 * is that if SO_RCVBUF is too small then small packets 1164 * must be discarded. 1165 */ 1166 #ifdef __linux__ 1167 if (level == SOL_SOCKET && opt == SO_RCVBUF) { 1168 int *bufsize = (int *)arg; 1169 if (*bufsize < 1024) { 1170 *bufsize = 1024; 1171 } 1172 } 1173 #endif 1174 1175 #if defined(_ALLBSD_SOURCE) 1176 /* 1177 * SOL_SOCKET/{SO_SNDBUF,SO_RCVBUF} - On FreeBSD need to 1178 * ensure that value is <= kern.ipc.maxsockbuf as otherwise we get 1179 * an ENOBUFS error. 1180 */ 1181 if (level == SOL_SOCKET) { 1182 if (opt == SO_SNDBUF || opt == SO_RCVBUF) { 1183 #ifdef KIPC_MAXSOCKBUF 1184 if (maxsockbuf == -1) { 1185 mib[0] = CTL_KERN; 1186 mib[1] = KERN_IPC; 1187 mib[2] = KIPC_MAXSOCKBUF; 1188 rlen = sizeof(maxsockbuf); 1189 if (sysctl(mib, 3, &maxsockbuf, &rlen, NULL, 0) == -1) 1190 maxsockbuf = 1024; 1191 1192 #if 1 1193 /* XXXBSD: This is a hack to workaround mb_max/mb_max_adj 1194 problem. It should be removed when kern.ipc.maxsockbuf 1195 will be real value. */ 1196 maxsockbuf = (maxsockbuf/5)*4; 1197 #endif 1198 } 1199 #elif defined(__OpenBSD__) 1200 maxsockbuf = SB_MAX; 1201 #else 1202 maxsockbuf = 64 * 1024; /* XXX: NetBSD */ 1203 #endif 1204 1205 bufsize = (int *)arg; 1206 if (*bufsize > maxsockbuf) { 1207 *bufsize = maxsockbuf; 1208 } 1209 1210 if (opt == SO_RCVBUF && *bufsize < 1024) { 1211 *bufsize = 1024; 1212 } 1213 1214 } 1215 } 1216 1217 /* 1218 * On Solaris, SO_REUSEADDR will allow multiple datagram 1219 * sockets to bind to the same port. The network jck tests 1220 * for this "feature", so we need to emulate it by turning on 1221 * SO_REUSEPORT as well for that combination. 1222 */ 1223 if (level == SOL_SOCKET && opt == SO_REUSEADDR) { 1224 int sotype; 1225 socklen_t arglen; 1226 1227 arglen = sizeof(sotype); 1228 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *)&sotype, &arglen) < 0) { 1229 return -1; 1230 } 1231 1232 if (sotype == SOCK_DGRAM) { 1233 setsockopt(fd, level, SO_REUSEPORT, arg, len); 1234 } 1235 } 1236 1237 #endif 1238 1239 return setsockopt(fd, level, opt, arg, len); 1240 } 1241 1242 /* 1243 * Wrapper for bind system call - performs any necessary pre/post 1244 * processing to deal with OS specific issues :- 1245 * 1246 * Linux allows a socket to bind to 127.0.0.255 which must be 1247 * caught. 1248 * 1249 * On Solaris with IPv6 enabled we must use an exclusive 1250 * bind to guaranteed a unique port number across the IPv4 and 1251 * IPv6 port spaces. 1252 * 1253 */ 1254 int 1255 NET_Bind(int fd, struct sockaddr *him, int len) 1256 { 1257 #if defined(__solaris__) && defined(AF_INET6) 1258 int level = -1; 1259 int exclbind = -1; 1260 #endif 1261 int rv; 1262 1263 #ifdef __linux__ 1264 /* 1265 * ## get bugId for this issue - goes back to 1.2.2 port ## 1266 * ## When IPv6 is enabled this will be an IPv4-mapped 1267 * ## with family set to AF_INET6 1268 */ 1269 if (him->sa_family == AF_INET) { 1270 struct sockaddr_in *sa = (struct sockaddr_in *)him; 1271 if ((ntohl(sa->sin_addr.s_addr) & 0x7f0000ff) == 0x7f0000ff) { 1272 errno = EADDRNOTAVAIL; 1273 return -1; 1274 } 1275 } 1276 #endif 1277 1278 #if defined(__solaris__) && defined(AF_INET6) 1279 /* 1280 * Solaris has seperate IPv4 and IPv6 port spaces so we 1281 * use an exclusive bind when SO_REUSEADDR is not used to 1282 * give the illusion of a unified port space. 1283 * This also avoids problems with IPv6 sockets connecting 1284 * to IPv4 mapped addresses whereby the socket conversion 1285 * results in a late bind that fails because the 1286 * corresponding IPv4 port is in use. 1287 */ 1288 if (ipv6_available()) { 1289 int arg, len; 1290 1291 len = sizeof(arg); 1292 if (useExclBind || getsockopt(fd, SOL_SOCKET, SO_REUSEADDR, 1293 (char *)&arg, &len) == 0) { 1294 if (useExclBind || arg == 0) { 1295 /* 1296 * SO_REUSEADDR is disabled or sun.net.useExclusiveBind 1297 * property is true so enable TCP_EXCLBIND or 1298 * UDP_EXCLBIND 1299 */ 1300 len = sizeof(arg); 1301 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&arg, 1302 &len) == 0) { 1303 if (arg == SOCK_STREAM) { 1304 level = IPPROTO_TCP; 1305 exclbind = TCP_EXCLBIND; 1306 } else { 1307 level = IPPROTO_UDP; 1308 exclbind = UDP_EXCLBIND; 1309 } 1310 } 1311 1312 arg = 1; 1313 setsockopt(fd, level, exclbind, (char *)&arg, 1314 sizeof(arg)); 1315 } 1316 } 1317 } 1318 1319 #endif 1320 1321 rv = bind(fd, him, len); 1322 1323 #if defined(__solaris__) && defined(AF_INET6) 1324 if (rv < 0) { 1325 int en = errno; 1326 /* Restore *_EXCLBIND if the bind fails */ 1327 if (exclbind != -1) { 1328 int arg = 0; 1329 setsockopt(fd, level, exclbind, (char *)&arg, 1330 sizeof(arg)); 1331 } 1332 errno = en; 1333 } 1334 #endif 1335 1336 return rv; 1337 } 1338 1339 // Android-removed: unused 1340 #if 0 1341 /** 1342 * Wrapper for select/poll with timeout on a single file descriptor. 1343 * 1344 * flags (defined in net_util_md.h can be any combination of 1345 * NET_WAIT_READ, NET_WAIT_WRITE & NET_WAIT_CONNECT. 1346 * 1347 * The function will return when either the socket is ready for one 1348 * of the specified operations or the timeout expired. 1349 * 1350 * It returns the time left from the timeout (possibly 0), or -1 if it expired. 1351 */ 1352 1353 jint 1354 NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout) 1355 { 1356 jlong prevTime = JVM_CurrentTimeMillis(env, 0); 1357 jint read_rv; 1358 1359 while (1) { 1360 jlong newTime; 1361 #ifndef USE_SELECT 1362 { 1363 struct pollfd pfd; 1364 pfd.fd = fd; 1365 pfd.events = 0; 1366 if (flags & NET_WAIT_READ) 1367 pfd.events |= POLLIN; 1368 if (flags & NET_WAIT_WRITE) 1369 pfd.events |= POLLOUT; 1370 if (flags & NET_WAIT_CONNECT) 1371 pfd.events |= POLLOUT; 1372 1373 errno = 0; 1374 read_rv = NET_Poll(&pfd, 1, timeout); 1375 } 1376 #else 1377 { 1378 fd_set rd, wr, ex; 1379 struct timeval t; 1380 1381 t.tv_sec = timeout / 1000; 1382 t.tv_usec = (timeout % 1000) * 1000; 1383 1384 FD_ZERO(&rd); 1385 FD_ZERO(&wr); 1386 FD_ZERO(&ex); 1387 if (flags & NET_WAIT_READ) { 1388 FD_SET(fd, &rd); 1389 } 1390 if (flags & NET_WAIT_WRITE) { 1391 FD_SET(fd, &wr); 1392 } 1393 if (flags & NET_WAIT_CONNECT) { 1394 FD_SET(fd, &wr); 1395 FD_SET(fd, &ex); 1396 } 1397 1398 errno = 0; 1399 read_rv = NET_Select(fd+1, &rd, &wr, &ex, &t); 1400 } 1401 #endif 1402 1403 newTime = JVM_CurrentTimeMillis(env, 0); 1404 timeout -= (newTime - prevTime); 1405 if (timeout <= 0) { 1406 return read_rv > 0 ? 0 : -1; 1407 } 1408 prevTime = newTime; 1409 1410 if (read_rv > 0) { 1411 break; 1412 } 1413 1414 1415 } /* while */ 1416 1417 return timeout; 1418 } 1419 #endif 1420 1421 #if 0 1422 // Stripped out unused code. 1423 // http://b/27301951 1424 __attribute__((destructor)) 1425 static void netUtilCleanUp() { 1426 if (loRoutes != 0) free(loRoutes); 1427 if (localifs != 0) free(localifs); 1428 } 1429 #endif 1430
