J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2007 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 <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 | #ifdef __solaris__ |
| 38 | #include <sys/sockio.h> |
| 39 | #include <stropts.h> |
| 40 | #include <inet/nd.h> |
| 41 | #endif |
| 42 | |
| 43 | #ifdef __linux__ |
| 44 | #include <arpa/inet.h> |
| 45 | #include <net/route.h> |
| 46 | #include <sys/utsname.h> |
| 47 | |
| 48 | #ifndef IPV6_FLOWINFO_SEND |
| 49 | #define IPV6_FLOWINFO_SEND 33 |
| 50 | #endif |
| 51 | |
| 52 | #endif |
| 53 | |
| 54 | #include "jni_util.h" |
| 55 | #include "jvm.h" |
| 56 | #include "net_util.h" |
| 57 | |
| 58 | #include "java_net_SocketOptions.h" |
| 59 | |
| 60 | /* needed from libsocket on Solaris 8 */ |
| 61 | |
| 62 | getaddrinfo_f getaddrinfo_ptr = NULL; |
| 63 | freeaddrinfo_f freeaddrinfo_ptr = NULL; |
| 64 | getnameinfo_f getnameinfo_ptr = NULL; |
| 65 | |
| 66 | /* |
| 67 | * EXCLBIND socket options only on Solaris 8 & 9. |
| 68 | */ |
| 69 | #if defined(__solaris__) && !defined(TCP_EXCLBIND) |
| 70 | #define TCP_EXCLBIND 0x21 |
| 71 | #endif |
| 72 | #if defined(__solaris__) && !defined(UDP_EXCLBIND) |
| 73 | #define UDP_EXCLBIND 0x0101 |
| 74 | #endif |
| 75 | |
| 76 | #ifdef __solaris__ |
| 77 | static int init_max_buf; |
| 78 | static int tcp_max_buf; |
| 79 | static int udp_max_buf; |
| 80 | |
| 81 | /* |
| 82 | * Get the specified parameter from the specified driver. The value |
| 83 | * of the parameter is assumed to be an 'int'. If the parameter |
| 84 | * cannot be obtained return the specified default value. |
| 85 | */ |
| 86 | static int |
| 87 | getParam(char *driver, char *param, int dflt) |
| 88 | { |
| 89 | struct strioctl stri; |
| 90 | char buf [64]; |
| 91 | int s; |
| 92 | int value; |
| 93 | |
| 94 | s = open (driver, O_RDWR); |
| 95 | if (s < 0) { |
| 96 | return dflt; |
| 97 | } |
| 98 | strncpy (buf, param, sizeof(buf)); |
| 99 | stri.ic_cmd = ND_GET; |
| 100 | stri.ic_timout = 0; |
| 101 | stri.ic_dp = buf; |
| 102 | stri.ic_len = sizeof(buf); |
| 103 | if (ioctl (s, I_STR, &stri) < 0) { |
| 104 | value = dflt; |
| 105 | } else { |
| 106 | value = atoi(buf); |
| 107 | } |
| 108 | close (s); |
| 109 | return value; |
| 110 | } |
| 111 | #endif |
| 112 | |
| 113 | #ifdef __linux__ |
| 114 | static int kernelV22 = 0; |
| 115 | static int vinit = 0; |
| 116 | |
| 117 | int kernelIsV22 () { |
| 118 | if (!vinit) { |
| 119 | struct utsname sysinfo; |
| 120 | if (uname(&sysinfo) == 0) { |
| 121 | sysinfo.release[3] = '\0'; |
| 122 | if (strcmp(sysinfo.release, "2.2") == 0) { |
| 123 | kernelV22 = JNI_TRUE; |
| 124 | } |
| 125 | } |
| 126 | vinit = 1; |
| 127 | } |
| 128 | return kernelV22; |
| 129 | } |
| 130 | |
| 131 | static int kernelV24 = 0; |
| 132 | static int vinit24 = 0; |
| 133 | |
| 134 | int kernelIsV24 () { |
| 135 | if (!vinit24) { |
| 136 | struct utsname sysinfo; |
| 137 | if (uname(&sysinfo) == 0) { |
| 138 | sysinfo.release[3] = '\0'; |
| 139 | if (strcmp(sysinfo.release, "2.4") == 0) { |
| 140 | kernelV24 = JNI_TRUE; |
| 141 | } |
| 142 | } |
| 143 | vinit24 = 1; |
| 144 | } |
| 145 | return kernelV24; |
| 146 | } |
| 147 | |
| 148 | int getScopeID (struct sockaddr *him) { |
| 149 | struct sockaddr_in6 *hext = (struct sockaddr_in6 *)him; |
| 150 | if (kernelIsV22()) { |
| 151 | return 0; |
| 152 | } |
| 153 | return hext->sin6_scope_id; |
| 154 | } |
| 155 | |
| 156 | int cmpScopeID (unsigned int scope, struct sockaddr *him) { |
| 157 | struct sockaddr_in6 *hext = (struct sockaddr_in6 *)him; |
| 158 | if (kernelIsV22()) { |
| 159 | return 1; /* scope is ignored for comparison in 2.2 kernel */ |
| 160 | } |
| 161 | return hext->sin6_scope_id == scope; |
| 162 | } |
| 163 | |
| 164 | #else |
| 165 | |
| 166 | int getScopeID (struct sockaddr *him) { |
| 167 | struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; |
| 168 | return him6->sin6_scope_id; |
| 169 | } |
| 170 | |
| 171 | int cmpScopeID (unsigned int scope, struct sockaddr *him) { |
| 172 | struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; |
| 173 | return him6->sin6_scope_id == scope; |
| 174 | } |
| 175 | |
| 176 | #endif |
| 177 | |
| 178 | |
| 179 | void |
| 180 | NET_ThrowByNameWithLastError(JNIEnv *env, const char *name, |
| 181 | const char *defaultDetail) { |
| 182 | char errmsg[255]; |
| 183 | sprintf(errmsg, "errno: %d, error: %s\n", errno, defaultDetail); |
| 184 | JNU_ThrowByNameWithLastError(env, name, errmsg); |
| 185 | } |
| 186 | |
| 187 | void |
| 188 | NET_ThrowCurrent(JNIEnv *env, char *msg) { |
| 189 | NET_ThrowNew(env, errno, msg); |
| 190 | } |
| 191 | |
| 192 | void |
| 193 | NET_ThrowNew(JNIEnv *env, int errorNumber, char *msg) { |
| 194 | char fullMsg[512]; |
| 195 | if (!msg) { |
| 196 | msg = "no further information"; |
| 197 | } |
| 198 | switch(errorNumber) { |
| 199 | case EBADF: |
| 200 | jio_snprintf(fullMsg, sizeof(fullMsg), "socket closed: %s", msg); |
| 201 | JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", fullMsg); |
| 202 | break; |
| 203 | case EINTR: |
| 204 | JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException", msg); |
| 205 | break; |
| 206 | default: |
| 207 | errno = errorNumber; |
| 208 | JNU_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", msg); |
| 209 | break; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | |
| 214 | jfieldID |
| 215 | NET_GetFileDescriptorID(JNIEnv *env) |
| 216 | { |
| 217 | jclass cls = (*env)->FindClass(env, "java/io/FileDescriptor"); |
| 218 | CHECK_NULL_RETURN(cls, NULL); |
| 219 | return (*env)->GetFieldID(env, cls, "fd", "I"); |
| 220 | } |
| 221 | |
| 222 | jint IPv6_supported() |
| 223 | { |
| 224 | #ifndef AF_INET6 |
| 225 | return JNI_FALSE; |
| 226 | #endif |
| 227 | |
| 228 | #ifdef AF_INET6 |
| 229 | int fd; |
| 230 | void *ipv6_fn; |
| 231 | SOCKADDR sa; |
| 232 | int sa_len = sizeof(sa); |
| 233 | |
| 234 | fd = JVM_Socket(AF_INET6, SOCK_STREAM, 0) ; |
| 235 | if (fd < 0) { |
| 236 | /* |
| 237 | * TODO: We really cant tell since it may be an unrelated error |
| 238 | * for now we will assume that AF_INET6 is not available |
| 239 | */ |
| 240 | return JNI_FALSE; |
| 241 | } |
| 242 | |
| 243 | /* |
| 244 | * If fd 0 is a socket it means we've been launched from inetd or |
| 245 | * xinetd. If it's a socket then check the family - if it's an |
| 246 | * IPv4 socket then we need to disable IPv6. |
| 247 | */ |
| 248 | if (getsockname(0, (struct sockaddr *)&sa, &sa_len) == 0) { |
| 249 | struct sockaddr *saP = (struct sockaddr *)&sa; |
| 250 | if (saP->sa_family != AF_INET6) { |
| 251 | return JNI_FALSE; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * Linux - check if any interface has an IPv6 address. |
| 257 | * Don't need to parse the line - we just need an indication. |
| 258 | */ |
| 259 | #ifdef __linux__ |
| 260 | { |
| 261 | FILE *fP = fopen("/proc/net/if_inet6", "r"); |
| 262 | char buf[255]; |
| 263 | char *bufP; |
| 264 | |
| 265 | if (fP == NULL) { |
| 266 | close(fd); |
| 267 | return JNI_FALSE; |
| 268 | } |
| 269 | bufP = fgets(buf, sizeof(buf), fP); |
| 270 | fclose(fP); |
| 271 | if (bufP == NULL) { |
| 272 | close(fd); |
| 273 | return JNI_FALSE; |
| 274 | } |
| 275 | } |
| 276 | #endif |
| 277 | |
| 278 | /** |
| 279 | * On Solaris 8 it's possible to create INET6 sockets even |
| 280 | * though IPv6 is not enabled on all interfaces. Thus we |
| 281 | * query the number of IPv6 addresses to verify that IPv6 |
| 282 | * has been configured on at least one interface. |
| 283 | * |
| 284 | * On Linux it doesn't matter - if IPv6 is built-in the |
| 285 | * kernel then IPv6 addresses will be bound automatically |
| 286 | * to all interfaces. |
| 287 | */ |
| 288 | #ifdef __solaris__ |
| 289 | |
| 290 | #ifdef SIOCGLIFNUM |
| 291 | { |
| 292 | struct lifnum numifs; |
| 293 | |
| 294 | numifs.lifn_family = AF_INET6; |
| 295 | numifs.lifn_flags = 0; |
| 296 | if (ioctl(fd, SIOCGLIFNUM, (char *)&numifs) < 0) { |
| 297 | /** |
| 298 | * SIOCGLIFNUM failed - assume IPv6 not configured |
| 299 | */ |
| 300 | close(fd); |
| 301 | return JNI_FALSE; |
| 302 | } |
| 303 | /** |
| 304 | * If no IPv6 addresses then return false. If count > 0 |
| 305 | * it's possible that all IPv6 addresses are "down" but |
| 306 | * that's okay as they may be brought "up" while the |
| 307 | * VM is running. |
| 308 | */ |
| 309 | if (numifs.lifn_count == 0) { |
| 310 | close(fd); |
| 311 | return JNI_FALSE; |
| 312 | } |
| 313 | } |
| 314 | #else |
| 315 | /* SIOCGLIFNUM not defined in build environment ??? */ |
| 316 | close(fd); |
| 317 | return JNI_FALSE; |
| 318 | #endif |
| 319 | |
| 320 | #endif /* __solaris */ |
| 321 | |
| 322 | #endif /* AF_INET6 */ |
| 323 | |
| 324 | /* |
| 325 | * OK we may have the stack available in the kernel, |
| 326 | * we should also check if the APIs are available. |
| 327 | */ |
| 328 | ipv6_fn = JVM_FindLibraryEntry(RTLD_DEFAULT, "inet_pton"); |
| 329 | if (ipv6_fn == NULL ) { |
| 330 | close(fd); |
| 331 | return JNI_FALSE; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * We've got the library, let's get the pointers to some |
| 336 | * IPV6 specific functions. We have to do that because, at least |
| 337 | * on Solaris we may build on a system without IPV6 networking |
| 338 | * libraries, therefore we can't have a hard link to these |
| 339 | * functions. |
| 340 | */ |
| 341 | getaddrinfo_ptr = (getaddrinfo_f) |
| 342 | JVM_FindLibraryEntry(RTLD_DEFAULT, "getaddrinfo"); |
| 343 | |
| 344 | freeaddrinfo_ptr = (freeaddrinfo_f) |
| 345 | JVM_FindLibraryEntry(RTLD_DEFAULT, "freeaddrinfo"); |
| 346 | |
| 347 | getnameinfo_ptr = (getnameinfo_f) |
| 348 | JVM_FindLibraryEntry(RTLD_DEFAULT, "getnameinfo"); |
| 349 | |
| 350 | if (freeaddrinfo_ptr == NULL || getnameinfo_ptr == NULL) { |
| 351 | /* Wee need all 3 of them */ |
| 352 | getaddrinfo_ptr = NULL; |
| 353 | } |
| 354 | |
| 355 | close(fd); |
| 356 | return JNI_TRUE; |
| 357 | } |
| 358 | |
| 359 | void |
| 360 | NET_AllocSockaddr(struct sockaddr **him, int *len) { |
| 361 | #ifdef AF_INET6 |
| 362 | if (ipv6_available()) { |
| 363 | struct sockaddr_in6 *him6 = (struct sockaddr_in6*)malloc(sizeof(struct sockaddr_in6)); |
| 364 | *him = (struct sockaddr*)him6; |
| 365 | *len = sizeof(struct sockaddr_in6); |
| 366 | } else |
| 367 | #endif /* AF_INET6 */ |
| 368 | { |
| 369 | struct sockaddr_in *him4 = (struct sockaddr_in*)malloc(sizeof(struct sockaddr_in)); |
| 370 | *him = (struct sockaddr*)him4; |
| 371 | *len = sizeof(struct sockaddr_in); |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | #if defined(__linux__) && defined(AF_INET6) |
| 376 | |
| 377 | |
| 378 | /* following code creates a list of addresses from the kernel |
| 379 | * routing table that are routed via the loopback address. |
| 380 | * We check all destination addresses against this table |
| 381 | * and override the scope_id field to use the relevant value for "lo" |
| 382 | * in order to work-around the Linux bug that prevents packets destined |
| 383 | * for certain local addresses from being sent via a physical interface. |
| 384 | */ |
| 385 | |
| 386 | struct loopback_route { |
| 387 | struct in6_addr addr; /* destination address */ |
| 388 | int plen; /* prefix length */ |
| 389 | }; |
| 390 | |
| 391 | static struct loopback_route *loRoutes = 0; |
| 392 | static int nRoutes = 0; /* number of routes */ |
| 393 | static int loRoutes_size = 16; /* initial size */ |
| 394 | static int lo_scope_id = 0; |
| 395 | |
| 396 | static void initLoopbackRoutes(); |
| 397 | |
| 398 | void printAddr (struct in6_addr *addr) { |
| 399 | int i; |
| 400 | for (i=0; i<16; i++) { |
| 401 | printf ("%02x", addr->s6_addr[i]); |
| 402 | } |
| 403 | printf ("\n"); |
| 404 | } |
| 405 | |
| 406 | static jboolean needsLoopbackRoute (struct in6_addr* dest_addr) { |
| 407 | int byte_count; |
| 408 | int extra_bits, i; |
| 409 | struct loopback_route *ptr; |
| 410 | |
| 411 | if (loRoutes == 0) { |
| 412 | initLoopbackRoutes(); |
| 413 | } |
| 414 | |
| 415 | for (ptr = loRoutes, i=0; i<nRoutes; i++, ptr++) { |
| 416 | struct in6_addr *target_addr=&ptr->addr; |
| 417 | int dest_plen = ptr->plen; |
| 418 | byte_count = dest_plen >> 3; |
| 419 | extra_bits = dest_plen & 0x3; |
| 420 | |
| 421 | if (byte_count > 0) { |
| 422 | if (memcmp(target_addr, dest_addr, byte_count)) { |
| 423 | continue; /* no match */ |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | if (extra_bits > 0) { |
| 428 | unsigned char c1 = ((unsigned char *)target_addr)[byte_count]; |
| 429 | unsigned char c2 = ((unsigned char *)&dest_addr)[byte_count]; |
| 430 | unsigned char mask = 0xff << (8 - extra_bits); |
| 431 | if ((c1 & mask) != (c2 & mask)) { |
| 432 | continue; |
| 433 | } |
| 434 | } |
| 435 | return JNI_TRUE; |
| 436 | } |
| 437 | return JNI_FALSE; |
| 438 | } |
| 439 | |
| 440 | |
| 441 | static void initLoopbackRoutes() { |
| 442 | FILE *f; |
| 443 | char srcp[8][5]; |
| 444 | char hopp[8][5]; |
| 445 | int dest_plen, src_plen, use, refcnt, metric; |
| 446 | unsigned long flags; |
| 447 | char dest_str[40]; |
| 448 | struct in6_addr dest_addr; |
| 449 | char device[16]; |
| 450 | jboolean match = JNI_FALSE; |
| 451 | |
| 452 | if (loRoutes != 0) { |
| 453 | free (loRoutes); |
| 454 | } |
| 455 | loRoutes = calloc (loRoutes_size, sizeof(struct loopback_route)); |
| 456 | if (loRoutes == 0) { |
| 457 | return; |
| 458 | } |
| 459 | /* |
| 460 | * Scan /proc/net/ipv6_route looking for a matching |
| 461 | * route. |
| 462 | */ |
| 463 | if ((f = fopen("/proc/net/ipv6_route", "r")) == NULL) { |
| 464 | return ; |
| 465 | } |
| 466 | while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x " |
| 467 | "%4s%4s%4s%4s%4s%4s%4s%4s %02x " |
| 468 | "%4s%4s%4s%4s%4s%4s%4s%4s " |
| 469 | "%08x %08x %08x %08lx %8s", |
| 470 | dest_str, &dest_str[5], &dest_str[10], &dest_str[15], |
| 471 | &dest_str[20], &dest_str[25], &dest_str[30], &dest_str[35], |
| 472 | &dest_plen, |
| 473 | srcp[0], srcp[1], srcp[2], srcp[3], |
| 474 | srcp[4], srcp[5], srcp[6], srcp[7], |
| 475 | &src_plen, |
| 476 | hopp[0], hopp[1], hopp[2], hopp[3], |
| 477 | hopp[4], hopp[5], hopp[6], hopp[7], |
| 478 | &metric, &use, &refcnt, &flags, device) == 31) { |
| 479 | |
| 480 | /* |
| 481 | * Some routes should be ignored |
| 482 | */ |
| 483 | if ( (dest_plen < 0 || dest_plen > 128) || |
| 484 | (src_plen != 0) || |
| 485 | (flags & (RTF_POLICY | RTF_FLOW)) || |
| 486 | ((flags & RTF_REJECT) && dest_plen == 0) ) { |
| 487 | continue; |
| 488 | } |
| 489 | |
| 490 | /* |
| 491 | * Convert the destination address |
| 492 | */ |
| 493 | dest_str[4] = ':'; |
| 494 | dest_str[9] = ':'; |
| 495 | dest_str[14] = ':'; |
| 496 | dest_str[19] = ':'; |
| 497 | dest_str[24] = ':'; |
| 498 | dest_str[29] = ':'; |
| 499 | dest_str[34] = ':'; |
| 500 | dest_str[39] = '\0'; |
| 501 | |
| 502 | if (inet_pton(AF_INET6, dest_str, &dest_addr) < 0) { |
| 503 | /* not an Ipv6 address */ |
| 504 | continue; |
| 505 | } |
| 506 | if (strcmp(device, "lo") != 0) { |
| 507 | /* Not a loopback route */ |
| 508 | continue; |
| 509 | } else { |
| 510 | if (nRoutes == loRoutes_size) { |
| 511 | loRoutes = realloc (loRoutes, loRoutes_size * |
| 512 | sizeof (struct loopback_route) * 2); |
| 513 | if (loRoutes == 0) { |
| 514 | return ; |
| 515 | } |
| 516 | loRoutes_size *= 2; |
| 517 | } |
| 518 | memcpy (&loRoutes[nRoutes].addr,&dest_addr,sizeof(struct in6_addr)); |
| 519 | loRoutes[nRoutes].plen = dest_plen; |
| 520 | nRoutes ++; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | fclose (f); |
| 525 | { |
| 526 | /* now find the scope_id for "lo" */ |
| 527 | |
| 528 | char addr6[40], devname[20]; |
| 529 | char addr6p[8][5]; |
| 530 | int plen, scope, dad_status, if_idx; |
| 531 | |
| 532 | if ((f = fopen("/proc/net/if_inet6", "r")) != NULL) { |
| 533 | while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x %02x %02x %02x %20s\n", |
| 534 | addr6p[0], addr6p[1], addr6p[2], addr6p[3], |
| 535 | addr6p[4], addr6p[5], addr6p[6], addr6p[7], |
| 536 | &if_idx, &plen, &scope, &dad_status, devname) == 13) { |
| 537 | |
| 538 | if (strcmp(devname, "lo") == 0) { |
| 539 | /* |
| 540 | * Found - so just return the index |
| 541 | */ |
| 542 | fclose(f); |
| 543 | lo_scope_id = if_idx; |
| 544 | return; |
| 545 | } |
| 546 | } |
| 547 | fclose(f); |
| 548 | } |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | /* |
| 553 | * Following is used for binding to local addresses. Equivalent |
| 554 | * to code above, for bind(). |
| 555 | */ |
| 556 | |
| 557 | struct localinterface { |
| 558 | int index; |
| 559 | char localaddr [16]; |
| 560 | }; |
| 561 | |
| 562 | static struct localinterface *localifs = 0; |
| 563 | static int localifsSize = 0; /* size of array */ |
| 564 | static int nifs = 0; /* number of entries used in array */ |
| 565 | |
| 566 | /* not thread safe: make sure called once from one thread */ |
| 567 | |
| 568 | static void initLocalIfs () { |
| 569 | FILE *f; |
| 570 | unsigned char staddr [16]; |
| 571 | char ifname [32]; |
| 572 | struct localinterface *lif=0; |
| 573 | int index, x1, x2, x3; |
| 574 | unsigned int u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,ua,ub,uc,ud,ue,uf; |
| 575 | |
| 576 | if ((f = fopen("/proc/net/if_inet6", "r")) == NULL) { |
| 577 | return ; |
| 578 | } |
| 579 | while (fscanf (f, "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x " |
| 580 | "%d %x %x %x %s",&u0,&u1,&u2,&u3,&u4,&u5,&u6,&u7, |
| 581 | &u8,&u9,&ua,&ub,&uc,&ud,&ue,&uf, |
| 582 | &index, &x1, &x2, &x3, ifname) == 21) { |
| 583 | staddr[0] = (unsigned char)u0; |
| 584 | staddr[1] = (unsigned char)u1; |
| 585 | staddr[2] = (unsigned char)u2; |
| 586 | staddr[3] = (unsigned char)u3; |
| 587 | staddr[4] = (unsigned char)u4; |
| 588 | staddr[5] = (unsigned char)u5; |
| 589 | staddr[6] = (unsigned char)u6; |
| 590 | staddr[7] = (unsigned char)u7; |
| 591 | staddr[8] = (unsigned char)u8; |
| 592 | staddr[9] = (unsigned char)u9; |
| 593 | staddr[10] = (unsigned char)ua; |
| 594 | staddr[11] = (unsigned char)ub; |
| 595 | staddr[12] = (unsigned char)uc; |
| 596 | staddr[13] = (unsigned char)ud; |
| 597 | staddr[14] = (unsigned char)ue; |
| 598 | staddr[15] = (unsigned char)uf; |
| 599 | nifs ++; |
| 600 | if (nifs > localifsSize) { |
| 601 | localifs = (struct localinterface *) realloc ( |
| 602 | localifs, sizeof (struct localinterface)* (localifsSize+5)); |
| 603 | if (localifs == 0) { |
| 604 | nifs = 0; |
| 605 | fclose (f); |
| 606 | return; |
| 607 | } |
| 608 | lif = localifs + localifsSize; |
| 609 | localifsSize += 5; |
| 610 | } else { |
| 611 | lif ++; |
| 612 | } |
| 613 | memcpy (lif->localaddr, staddr, 16); |
| 614 | lif->index = index; |
| 615 | } |
| 616 | fclose (f); |
| 617 | } |
| 618 | |
| 619 | /* return the scope_id (interface index) of the |
| 620 | * interface corresponding to the given address |
| 621 | * returns 0 if no match found |
| 622 | */ |
| 623 | |
| 624 | static int getLocalScopeID (char *addr) { |
| 625 | struct localinterface *lif; |
| 626 | int i; |
| 627 | if (localifs == 0) { |
| 628 | initLocalIfs(); |
| 629 | } |
| 630 | for (i=0, lif=localifs; i<nifs; i++, lif++) { |
| 631 | if (memcmp (addr, lif->localaddr, 16) == 0) { |
| 632 | return lif->index; |
| 633 | } |
| 634 | } |
| 635 | return 0; |
| 636 | } |
| 637 | |
| 638 | void initLocalAddrTable () { |
| 639 | initLoopbackRoutes(); |
| 640 | initLocalIfs(); |
| 641 | } |
| 642 | |
| 643 | #else |
| 644 | |
| 645 | void initLocalAddrTable () {} |
| 646 | |
| 647 | #endif |
| 648 | |
| 649 | /* In the case of an IPv4 Inetaddress this method will return an |
| 650 | * IPv4 mapped address where IPv6 is available and v4MappedAddress is TRUE. |
| 651 | * Otherwise it will return a sockaddr_in structure for an IPv4 InetAddress. |
| 652 | */ |
| 653 | JNIEXPORT int JNICALL |
| 654 | NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port, struct sockaddr *him, |
| 655 | int *len, jboolean v4MappedAddress) { |
| 656 | jint family; |
| 657 | family = (*env)->GetIntField(env, iaObj, ia_familyID); |
| 658 | #ifdef AF_INET6 |
| 659 | /* needs work. 1. family 2. clean up him6 etc deallocate memory */ |
| 660 | if (ipv6_available() && !(family == IPv4 && v4MappedAddress == JNI_FALSE)) { |
| 661 | struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; |
| 662 | jbyteArray ipaddress; |
| 663 | jbyte caddr[16]; |
| 664 | jint address; |
| 665 | |
| 666 | |
| 667 | if (family == IPv4) { /* will convert to IPv4-mapped address */ |
| 668 | memset((char *) caddr, 0, 16); |
| 669 | address = (*env)->GetIntField(env, iaObj, ia_addressID); |
| 670 | if (address == INADDR_ANY) { |
| 671 | /* we would always prefer IPv6 wildcard address |
| 672 | caddr[10] = 0xff; |
| 673 | caddr[11] = 0xff; */ |
| 674 | } else { |
| 675 | caddr[10] = 0xff; |
| 676 | caddr[11] = 0xff; |
| 677 | caddr[12] = ((address >> 24) & 0xff); |
| 678 | caddr[13] = ((address >> 16) & 0xff); |
| 679 | caddr[14] = ((address >> 8) & 0xff); |
| 680 | caddr[15] = (address & 0xff); |
| 681 | } |
| 682 | } else { |
| 683 | ipaddress = (*env)->GetObjectField(env, iaObj, ia6_ipaddressID); |
| 684 | (*env)->GetByteArrayRegion(env, ipaddress, 0, 16, caddr); |
| 685 | } |
| 686 | memset((char *)him6, 0, sizeof(struct sockaddr_in6)); |
| 687 | him6->sin6_port = htons(port); |
| 688 | memcpy((void *)&(him6->sin6_addr), caddr, sizeof(struct in6_addr) ); |
| 689 | him6->sin6_family = AF_INET6; |
| 690 | *len = sizeof(struct sockaddr_in6) ; |
| 691 | |
| 692 | /* |
| 693 | * On Linux if we are connecting to a link-local address |
| 694 | * we need to specify the interface in the scope_id (2.4 kernel only) |
| 695 | * |
| 696 | * If the scope was cached the we use the cached value. If not cached but |
| 697 | * specified in the Inet6Address we use that, but we first check if the |
| 698 | * address needs to be routed via the loopback interface. In this case, |
| 699 | * we override the specified value with that of the loopback interface. |
| 700 | * If no cached value exists and no value was specified by user, then |
| 701 | * we try to determine a value ffrom the routing table. In all these |
| 702 | * cases the used value is cached for further use. |
| 703 | */ |
| 704 | #ifdef __linux__ |
| 705 | if (IN6_IS_ADDR_LINKLOCAL(&(him6->sin6_addr))) { |
| 706 | int cached_scope_id = 0, scope_id = 0; |
| 707 | int old_kernel = kernelIsV22(); |
| 708 | |
| 709 | if (ia6_cachedscopeidID && !old_kernel) { |
| 710 | cached_scope_id = (int)(*env)->GetIntField(env, iaObj, ia6_cachedscopeidID); |
| 711 | /* if cached value exists then use it. Otherwise, check |
| 712 | * if scope is set in the address. |
| 713 | */ |
| 714 | if (!cached_scope_id) { |
| 715 | if (ia6_scopeidID) { |
| 716 | scope_id = (int)(*env)->GetIntField(env,iaObj,ia6_scopeidID); |
| 717 | } |
| 718 | if (scope_id != 0) { |
| 719 | /* check user-specified value for loopback case |
| 720 | * that needs to be overridden |
| 721 | */ |
| 722 | if (kernelIsV24() && needsLoopbackRoute (&him6->sin6_addr)) { |
| 723 | cached_scope_id = lo_scope_id; |
| 724 | (*env)->SetIntField(env, iaObj, ia6_cachedscopeidID, cached_scope_id); |
| 725 | } |
| 726 | } else { |
| 727 | /* |
| 728 | * Otherwise consult the IPv6 routing tables to |
| 729 | * try determine the appropriate interface. |
| 730 | */ |
| 731 | if (kernelIsV24()) { |
| 732 | cached_scope_id = getDefaultIPv6Interface( &(him6->sin6_addr) ); |
| 733 | } else { |
| 734 | cached_scope_id = getLocalScopeID( (char *)&(him6->sin6_addr) ); |
| 735 | if (cached_scope_id == 0) { |
| 736 | cached_scope_id = getDefaultIPv6Interface( &(him6->sin6_addr) ); |
| 737 | } |
| 738 | } |
| 739 | (*env)->SetIntField(env, iaObj, ia6_cachedscopeidID, cached_scope_id); |
| 740 | } |
| 741 | } |
| 742 | } |
| 743 | |
| 744 | /* |
| 745 | * If we have a scope_id use the extended form |
| 746 | * of sockaddr_in6. |
| 747 | */ |
| 748 | |
| 749 | if (!old_kernel) { |
| 750 | struct sockaddr_in6 *him6 = |
| 751 | (struct sockaddr_in6 *)him; |
| 752 | him6->sin6_scope_id = cached_scope_id != 0 ? |
| 753 | cached_scope_id : scope_id; |
| 754 | *len = sizeof(struct sockaddr_in6); |
| 755 | } |
| 756 | } |
| 757 | #else |
| 758 | /* handle scope_id for solaris */ |
| 759 | |
| 760 | if (family != IPv4) { |
| 761 | if (ia6_scopeidID) { |
| 762 | him6->sin6_scope_id = (int)(*env)->GetIntField(env, iaObj, ia6_scopeidID); |
| 763 | } |
| 764 | } |
| 765 | #endif |
| 766 | } else |
| 767 | #endif /* AF_INET6 */ |
| 768 | { |
| 769 | struct sockaddr_in *him4 = (struct sockaddr_in*)him; |
| 770 | jint address; |
| 771 | if (family == IPv6) { |
| 772 | JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Protocol family unavailable"); |
| 773 | return -1; |
| 774 | } |
| 775 | memset((char *) him4, 0, sizeof(struct sockaddr_in)); |
| 776 | address = (*env)->GetIntField(env, iaObj, ia_addressID); |
| 777 | him4->sin_port = htons((short) port); |
| 778 | him4->sin_addr.s_addr = (uint32_t) htonl(address); |
| 779 | him4->sin_family = AF_INET; |
| 780 | *len = sizeof(struct sockaddr_in); |
| 781 | } |
| 782 | return 0; |
| 783 | } |
| 784 | |
| 785 | void |
| 786 | NET_SetTrafficClass(struct sockaddr *him, int trafficClass) { |
| 787 | #ifdef AF_INET6 |
| 788 | if (him->sa_family == AF_INET6) { |
| 789 | struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; |
| 790 | him6->sin6_flowinfo = htonl((trafficClass & 0xff) << 20); |
| 791 | } |
| 792 | #endif /* AF_INET6 */ |
| 793 | } |
| 794 | |
| 795 | jint |
| 796 | NET_GetPortFromSockaddr(struct sockaddr *him) { |
| 797 | #ifdef AF_INET6 |
| 798 | if (him->sa_family == AF_INET6) { |
| 799 | return ntohs(((struct sockaddr_in6*)him)->sin6_port); |
| 800 | |
| 801 | } else |
| 802 | #endif /* AF_INET6 */ |
| 803 | { |
| 804 | return ntohs(((struct sockaddr_in*)him)->sin_port); |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | int |
| 809 | NET_IsIPv4Mapped(jbyte* caddr) { |
| 810 | int i; |
| 811 | for (i = 0; i < 10; i++) { |
| 812 | if (caddr[i] != 0x00) { |
| 813 | return 0; /* false */ |
| 814 | } |
| 815 | } |
| 816 | |
| 817 | if (((caddr[10] & 0xff) == 0xff) && ((caddr[11] & 0xff) == 0xff)) { |
| 818 | return 1; /* true */ |
| 819 | } |
| 820 | return 0; /* false */ |
| 821 | } |
| 822 | |
| 823 | int |
| 824 | NET_IPv4MappedToIPv4(jbyte* caddr) { |
| 825 | return ((caddr[12] & 0xff) << 24) | ((caddr[13] & 0xff) << 16) | ((caddr[14] & 0xff) << 8) |
| 826 | | (caddr[15] & 0xff); |
| 827 | } |
| 828 | |
| 829 | int |
| 830 | NET_IsEqual(jbyte* caddr1, jbyte* caddr2) { |
| 831 | int i; |
| 832 | for (i = 0; i < 16; i++) { |
| 833 | if (caddr1[i] != caddr2[i]) { |
| 834 | return 0; /* false */ |
| 835 | } |
| 836 | } |
| 837 | return 1; |
| 838 | } |
| 839 | |
| 840 | jboolean NET_addrtransAvailable() { |
| 841 | return (jboolean)(getaddrinfo_ptr != NULL); |
| 842 | } |
| 843 | |
| 844 | /* |
| 845 | * Map the Java level socket option to the platform specific |
| 846 | * level and option name. |
| 847 | */ |
| 848 | int |
| 849 | NET_MapSocketOption(jint cmd, int *level, int *optname) { |
| 850 | static struct { |
| 851 | jint cmd; |
| 852 | int level; |
| 853 | int optname; |
| 854 | } const opts[] = { |
| 855 | { java_net_SocketOptions_TCP_NODELAY, IPPROTO_TCP, TCP_NODELAY }, |
| 856 | { java_net_SocketOptions_SO_OOBINLINE, SOL_SOCKET, SO_OOBINLINE }, |
| 857 | { java_net_SocketOptions_SO_LINGER, SOL_SOCKET, SO_LINGER }, |
| 858 | { java_net_SocketOptions_SO_SNDBUF, SOL_SOCKET, SO_SNDBUF }, |
| 859 | { java_net_SocketOptions_SO_RCVBUF, SOL_SOCKET, SO_RCVBUF }, |
| 860 | { java_net_SocketOptions_SO_KEEPALIVE, SOL_SOCKET, SO_KEEPALIVE }, |
| 861 | { java_net_SocketOptions_SO_REUSEADDR, SOL_SOCKET, SO_REUSEADDR }, |
| 862 | { java_net_SocketOptions_SO_BROADCAST, SOL_SOCKET, SO_BROADCAST }, |
| 863 | { java_net_SocketOptions_IP_TOS, IPPROTO_IP, IP_TOS }, |
| 864 | { java_net_SocketOptions_IP_MULTICAST_IF, IPPROTO_IP, IP_MULTICAST_IF }, |
| 865 | { java_net_SocketOptions_IP_MULTICAST_IF2, IPPROTO_IP, IP_MULTICAST_IF }, |
| 866 | { java_net_SocketOptions_IP_MULTICAST_LOOP, IPPROTO_IP, IP_MULTICAST_LOOP }, |
| 867 | }; |
| 868 | |
| 869 | int i; |
| 870 | |
| 871 | /* |
| 872 | * Different multicast options if IPv6 is enabled |
| 873 | */ |
| 874 | #ifdef AF_INET6 |
| 875 | if (ipv6_available()) { |
| 876 | switch (cmd) { |
| 877 | case java_net_SocketOptions_IP_MULTICAST_IF: |
| 878 | case java_net_SocketOptions_IP_MULTICAST_IF2: |
| 879 | *level = IPPROTO_IPV6; |
| 880 | *optname = IPV6_MULTICAST_IF; |
| 881 | return 0; |
| 882 | |
| 883 | case java_net_SocketOptions_IP_MULTICAST_LOOP: |
| 884 | *level = IPPROTO_IPV6; |
| 885 | *optname = IPV6_MULTICAST_LOOP; |
| 886 | return 0; |
| 887 | } |
| 888 | } |
| 889 | #endif |
| 890 | |
| 891 | /* |
| 892 | * Map the Java level option to the native level |
| 893 | */ |
| 894 | for (i=0; i<(int)(sizeof(opts) / sizeof(opts[0])); i++) { |
| 895 | if (cmd == opts[i].cmd) { |
| 896 | *level = opts[i].level; |
| 897 | *optname = opts[i].optname; |
| 898 | return 0; |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | /* not found */ |
| 903 | return -1; |
| 904 | } |
| 905 | |
| 906 | /* |
| 907 | * Determine the default interface for an IPv6 address. |
| 908 | * |
| 909 | * 1. Scans /proc/net/ipv6_route for a matching route |
| 910 | * (eg: fe80::/10 or a route for the specific address). |
| 911 | * This will tell us the interface to use (eg: "eth0"). |
| 912 | * |
| 913 | * 2. Lookup /proc/net/if_inet6 to map the interface |
| 914 | * name to an interface index. |
| 915 | * |
| 916 | * Returns :- |
| 917 | * -1 if error |
| 918 | * 0 if no matching interface |
| 919 | * >1 interface index to use for the link-local address. |
| 920 | */ |
| 921 | #if defined(__linux__) && defined(AF_INET6) |
| 922 | int getDefaultIPv6Interface(struct in6_addr *target_addr) { |
| 923 | FILE *f; |
| 924 | char srcp[8][5]; |
| 925 | char hopp[8][5]; |
| 926 | int dest_plen, src_plen, use, refcnt, metric; |
| 927 | unsigned long flags; |
| 928 | char dest_str[40]; |
| 929 | struct in6_addr dest_addr; |
| 930 | char device[16]; |
| 931 | jboolean match = JNI_FALSE; |
| 932 | |
| 933 | /* |
| 934 | * Scan /proc/net/ipv6_route looking for a matching |
| 935 | * route. |
| 936 | */ |
| 937 | if ((f = fopen("/proc/net/ipv6_route", "r")) == NULL) { |
| 938 | return -1; |
| 939 | } |
| 940 | while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x " |
| 941 | "%4s%4s%4s%4s%4s%4s%4s%4s %02x " |
| 942 | "%4s%4s%4s%4s%4s%4s%4s%4s " |
| 943 | "%08x %08x %08x %08lx %8s", |
| 944 | dest_str, &dest_str[5], &dest_str[10], &dest_str[15], |
| 945 | &dest_str[20], &dest_str[25], &dest_str[30], &dest_str[35], |
| 946 | &dest_plen, |
| 947 | srcp[0], srcp[1], srcp[2], srcp[3], |
| 948 | srcp[4], srcp[5], srcp[6], srcp[7], |
| 949 | &src_plen, |
| 950 | hopp[0], hopp[1], hopp[2], hopp[3], |
| 951 | hopp[4], hopp[5], hopp[6], hopp[7], |
| 952 | &metric, &use, &refcnt, &flags, device) == 31) { |
| 953 | |
| 954 | /* |
| 955 | * Some routes should be ignored |
| 956 | */ |
| 957 | if ( (dest_plen < 0 || dest_plen > 128) || |
| 958 | (src_plen != 0) || |
| 959 | (flags & (RTF_POLICY | RTF_FLOW)) || |
| 960 | ((flags & RTF_REJECT) && dest_plen == 0) ) { |
| 961 | continue; |
| 962 | } |
| 963 | |
| 964 | /* |
| 965 | * Convert the destination address |
| 966 | */ |
| 967 | dest_str[4] = ':'; |
| 968 | dest_str[9] = ':'; |
| 969 | dest_str[14] = ':'; |
| 970 | dest_str[19] = ':'; |
| 971 | dest_str[24] = ':'; |
| 972 | dest_str[29] = ':'; |
| 973 | dest_str[34] = ':'; |
| 974 | dest_str[39] = '\0'; |
| 975 | |
| 976 | if (inet_pton(AF_INET6, dest_str, &dest_addr) < 0) { |
| 977 | /* not an Ipv6 address */ |
| 978 | continue; |
| 979 | } else { |
| 980 | /* |
| 981 | * The prefix len (dest_plen) indicates the number of bits we |
| 982 | * need to match on. |
| 983 | * |
| 984 | * dest_plen / 8 => number of bytes to match |
| 985 | * dest_plen % 8 => number of additional bits to match |
| 986 | * |
| 987 | * eg: fe80::/10 => match 1 byte + 2 additional bits in the |
| 988 | * the next byte. |
| 989 | */ |
| 990 | int byte_count = dest_plen >> 3; |
| 991 | int extra_bits = dest_plen & 0x3; |
| 992 | |
| 993 | if (byte_count > 0) { |
| 994 | if (memcmp(target_addr, &dest_addr, byte_count)) { |
| 995 | continue; /* no match */ |
| 996 | } |
| 997 | } |
| 998 | |
| 999 | if (extra_bits > 0) { |
| 1000 | unsigned char c1 = ((unsigned char *)target_addr)[byte_count]; |
| 1001 | unsigned char c2 = ((unsigned char *)&dest_addr)[byte_count]; |
| 1002 | unsigned char mask = 0xff << (8 - extra_bits); |
| 1003 | if ((c1 & mask) != (c2 & mask)) { |
| 1004 | continue; |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | /* |
| 1009 | * We have a match |
| 1010 | */ |
| 1011 | match = JNI_TRUE; |
| 1012 | break; |
| 1013 | } |
| 1014 | } |
| 1015 | fclose(f); |
| 1016 | |
| 1017 | /* |
| 1018 | * If there's a match then we lookup the interface |
| 1019 | * index. |
| 1020 | */ |
| 1021 | if (match) { |
| 1022 | char addr6[40], devname[20]; |
| 1023 | char addr6p[8][5]; |
| 1024 | int plen, scope, dad_status, if_idx; |
| 1025 | |
| 1026 | if ((f = fopen("/proc/net/if_inet6", "r")) != NULL) { |
| 1027 | while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x %02x %02x %02x %20s\n", |
| 1028 | addr6p[0], addr6p[1], addr6p[2], addr6p[3], |
| 1029 | addr6p[4], addr6p[5], addr6p[6], addr6p[7], |
| 1030 | &if_idx, &plen, &scope, &dad_status, devname) == 13) { |
| 1031 | |
| 1032 | if (strcmp(devname, device) == 0) { |
| 1033 | /* |
| 1034 | * Found - so just return the index |
| 1035 | */ |
| 1036 | fclose(f); |
| 1037 | return if_idx; |
| 1038 | } |
| 1039 | } |
| 1040 | fclose(f); |
| 1041 | } else { |
| 1042 | /* |
| 1043 | * Couldn't open /proc/net/if_inet6 |
| 1044 | */ |
| 1045 | return -1; |
| 1046 | } |
| 1047 | } |
| 1048 | |
| 1049 | /* |
| 1050 | * If we get here it means we didn't there wasn't any |
| 1051 | * route or we couldn't get the index of the interface. |
| 1052 | */ |
| 1053 | return 0; |
| 1054 | } |
| 1055 | #endif |
| 1056 | |
| 1057 | |
| 1058 | /* |
| 1059 | * Wrapper for getsockopt system routine - does any necessary |
| 1060 | * pre/post processing to deal with OS specific oddies :- |
| 1061 | * |
| 1062 | * IP_TOS is a no-op with IPv6 sockets as it's setup when |
| 1063 | * the connection is established. |
| 1064 | * |
| 1065 | * On Linux the SO_SNDBUF/SO_RCVBUF values must be post-processed |
| 1066 | * to compensate for an incorrect value returned by the kernel. |
| 1067 | */ |
| 1068 | int |
| 1069 | NET_GetSockOpt(int fd, int level, int opt, void *result, |
| 1070 | int *len) |
| 1071 | { |
| 1072 | int rv; |
| 1073 | |
| 1074 | #ifdef AF_INET6 |
| 1075 | if ((level == IPPROTO_IP) && (opt == IP_TOS)) { |
| 1076 | if (ipv6_available()) { |
| 1077 | |
| 1078 | /* |
| 1079 | * For IPv6 socket option implemented at Java-level |
| 1080 | * so return -1. |
| 1081 | */ |
| 1082 | int *tc = (int *)result; |
| 1083 | *tc = -1; |
| 1084 | return 0; |
| 1085 | } |
| 1086 | } |
| 1087 | #endif |
| 1088 | |
| 1089 | rv = getsockopt(fd, level, opt, result, len); |
| 1090 | if (rv < 0) { |
| 1091 | return rv; |
| 1092 | } |
| 1093 | |
| 1094 | #ifdef __linux__ |
| 1095 | /* |
| 1096 | * On Linux SO_SNDBUF/SO_RCVBUF aren't symmetric. This |
| 1097 | * stems from additional socket structures in the send |
| 1098 | * and receive buffers. |
| 1099 | */ |
| 1100 | if ((level == SOL_SOCKET) && ((opt == SO_SNDBUF) |
| 1101 | || (opt == SO_RCVBUF))) { |
| 1102 | int n = *((int *)result); |
| 1103 | n /= 2; |
| 1104 | *((int *)result) = n; |
| 1105 | } |
| 1106 | #endif |
| 1107 | |
| 1108 | return rv; |
| 1109 | } |
| 1110 | |
| 1111 | |
| 1112 | /* |
| 1113 | * Wrapper for setsockopt system routine - performs any |
| 1114 | * necessary pre/post processing to deal with OS specific |
| 1115 | * issue :- |
| 1116 | * |
| 1117 | * On Solaris need to limit the suggested value for SO_SNDBUF |
| 1118 | * and SO_RCVBUF to the kernel configured limit |
| 1119 | * |
| 1120 | * For IP_TOS socket option need to mask off bits as this |
| 1121 | * aren't automatically masked by the kernel and results in |
| 1122 | * an error. In addition IP_TOS is a noop with IPv6 as it |
| 1123 | * should be setup as connection time. |
| 1124 | */ |
| 1125 | int |
| 1126 | NET_SetSockOpt(int fd, int level, int opt, const void *arg, |
| 1127 | int len) |
| 1128 | { |
| 1129 | #ifndef IPTOS_TOS_MASK |
| 1130 | #define IPTOS_TOS_MASK 0x1e |
| 1131 | #endif |
| 1132 | #ifndef IPTOS_PREC_MASK |
| 1133 | #define IPTOS_PREC_MASK 0xe0 |
| 1134 | #endif |
| 1135 | |
| 1136 | /* |
| 1137 | * IPPROTO/IP_TOS :- |
| 1138 | * 1. IPv6 on Solaris: no-op and will be set in flowinfo |
| 1139 | * field when connecting TCP socket, or sending |
| 1140 | * UDP packet. |
| 1141 | * 2. IPv6 on Linux: By default Linux ignores flowinfo |
| 1142 | * field so enable IPV6_FLOWINFO_SEND so that flowinfo |
| 1143 | * will be examined. |
| 1144 | * 3. IPv4: set socket option based on ToS and Precedence |
| 1145 | * fields (otherwise get invalid argument) |
| 1146 | */ |
| 1147 | if (level == IPPROTO_IP && opt == IP_TOS) { |
| 1148 | int *iptos; |
| 1149 | |
| 1150 | #if defined(AF_INET6) && defined(__solaris__) |
| 1151 | if (ipv6_available()) { |
| 1152 | return 0; |
| 1153 | } |
| 1154 | #endif |
| 1155 | |
| 1156 | #if defined(AF_INET6) && defined(__linux__) |
| 1157 | if (ipv6_available()) { |
| 1158 | int optval = 1; |
| 1159 | return setsockopt(fd, IPPROTO_IPV6, IPV6_FLOWINFO_SEND, |
| 1160 | (void *)&optval, sizeof(optval)); |
| 1161 | } |
| 1162 | #endif |
| 1163 | |
| 1164 | iptos = (int *)arg; |
| 1165 | *iptos &= (IPTOS_TOS_MASK | IPTOS_PREC_MASK); |
| 1166 | } |
| 1167 | |
| 1168 | /* |
| 1169 | * SOL_SOCKET/{SO_SNDBUF,SO_RCVBUF} - On Solaris need to |
| 1170 | * ensure that value is <= max_buf as otherwise we get |
| 1171 | * an invalid argument. |
| 1172 | */ |
| 1173 | #ifdef __solaris__ |
| 1174 | if (level == SOL_SOCKET) { |
| 1175 | if (opt == SO_SNDBUF || opt == SO_RCVBUF) { |
| 1176 | int sotype, arglen; |
| 1177 | int *bufsize, maxbuf; |
| 1178 | |
| 1179 | if (!init_max_buf) { |
| 1180 | tcp_max_buf = getParam("/dev/tcp", "tcp_max_buf", 64*1024); |
| 1181 | udp_max_buf = getParam("/dev/udp", "udp_max_buf", 64*1024); |
| 1182 | init_max_buf = 1; |
| 1183 | } |
| 1184 | |
| 1185 | arglen = sizeof(sotype); |
| 1186 | if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *)&sotype, |
| 1187 | &arglen) < 0) { |
| 1188 | return -1; |
| 1189 | } |
| 1190 | |
| 1191 | maxbuf = (sotype == SOCK_STREAM) ? tcp_max_buf : udp_max_buf; |
| 1192 | bufsize = (int *)arg; |
| 1193 | if (*bufsize > maxbuf) { |
| 1194 | *bufsize = maxbuf; |
| 1195 | } |
| 1196 | } |
| 1197 | } |
| 1198 | #endif |
| 1199 | |
| 1200 | /* |
| 1201 | * On Linux the receive buffer is used for both socket |
| 1202 | * structures and the the packet payload. The implication |
| 1203 | * is that if SO_RCVBUF is too small then small packets |
| 1204 | * must be discard. |
| 1205 | */ |
| 1206 | #ifdef __linux__ |
| 1207 | if (level == SOL_SOCKET && opt == SO_RCVBUF) { |
| 1208 | int *bufsize = (int *)arg; |
| 1209 | if (*bufsize < 1024) { |
| 1210 | *bufsize = 1024; |
| 1211 | } |
| 1212 | } |
| 1213 | #endif |
| 1214 | |
| 1215 | return setsockopt(fd, level, opt, arg, len); |
| 1216 | } |
| 1217 | |
| 1218 | /* |
| 1219 | * Wrapper for bind system call - performs any necessary pre/post |
| 1220 | * processing to deal with OS specific issues :- |
| 1221 | * |
| 1222 | * Linux allows a socket to bind to 127.0.0.255 which must be |
| 1223 | * caught. |
| 1224 | * |
| 1225 | * On Solaris 8/9 with IPv6 enabled we must use an exclusive |
| 1226 | * bind to guaranteed a unique port number across the IPv4 and |
| 1227 | * IPv6 port spaces. |
| 1228 | * |
| 1229 | */ |
| 1230 | int |
| 1231 | NET_Bind(int fd, struct sockaddr *him, int len) |
| 1232 | { |
| 1233 | #if defined(__solaris__) && defined(AF_INET6) |
| 1234 | int level = -1; |
| 1235 | int exclbind = -1; |
| 1236 | #endif |
| 1237 | int rv; |
| 1238 | |
| 1239 | #ifdef __linux__ |
| 1240 | /* |
| 1241 | * ## get bugId for this issue - goes back to 1.2.2 port ## |
| 1242 | * ## When IPv6 is enabled this will be an IPv4-mapped |
| 1243 | * ## with family set to AF_INET6 |
| 1244 | */ |
| 1245 | if (him->sa_family == AF_INET) { |
| 1246 | struct sockaddr_in *sa = (struct sockaddr_in *)him; |
| 1247 | if ((ntohl(sa->sin_addr.s_addr) & 0x7f0000ff) == 0x7f0000ff) { |
| 1248 | errno = EADDRNOTAVAIL; |
| 1249 | return -1; |
| 1250 | } |
| 1251 | } |
| 1252 | #endif |
| 1253 | |
| 1254 | #if defined(__solaris__) && defined(AF_INET6) |
| 1255 | /* |
| 1256 | * Solaris 8/9 have seperate IPv4 and IPv6 port spaces so we |
| 1257 | * use an exclusive bind when SO_REUSEADDR is not used to |
| 1258 | * give the illusion of a unified port space. |
| 1259 | * This also avoid problems with IPv6 sockets connecting |
| 1260 | * to IPv4 mapped addresses whereby the socket conversion |
| 1261 | * results in a late bind that fails because the |
| 1262 | * corresponding IPv4 port is in use. |
| 1263 | */ |
| 1264 | if (ipv6_available()) { |
| 1265 | int arg, len; |
| 1266 | |
| 1267 | len = sizeof(arg); |
| 1268 | if (getsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&arg, |
| 1269 | &len) == 0) { |
| 1270 | if (arg == 0) { |
| 1271 | /* |
| 1272 | * SO_REUSEADDR is disabled so enable TCP_EXCLBIND or |
| 1273 | * UDP_EXCLBIND |
| 1274 | */ |
| 1275 | len = sizeof(arg); |
| 1276 | if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&arg, |
| 1277 | &len) == 0) { |
| 1278 | if (arg == SOCK_STREAM) { |
| 1279 | level = IPPROTO_TCP; |
| 1280 | exclbind = TCP_EXCLBIND; |
| 1281 | } else { |
| 1282 | level = IPPROTO_UDP; |
| 1283 | exclbind = UDP_EXCLBIND; |
| 1284 | } |
| 1285 | } |
| 1286 | |
| 1287 | arg = 1; |
| 1288 | setsockopt(fd, level, exclbind, (char *)&arg, |
| 1289 | sizeof(arg)); |
| 1290 | } |
| 1291 | } |
| 1292 | } |
| 1293 | |
| 1294 | #endif |
| 1295 | |
| 1296 | rv = bind(fd, him, len); |
| 1297 | |
| 1298 | #if defined(__solaris__) && defined(AF_INET6) |
| 1299 | if (rv < 0) { |
| 1300 | int en = errno; |
| 1301 | /* Restore *_EXCLBIND if the bind fails */ |
| 1302 | if (exclbind != -1) { |
| 1303 | int arg = 0; |
| 1304 | setsockopt(fd, level, exclbind, (char *)&arg, |
| 1305 | sizeof(arg)); |
| 1306 | } |
| 1307 | errno = en; |
| 1308 | } |
| 1309 | #endif |
| 1310 | |
| 1311 | return rv; |
| 1312 | } |
| 1313 | |
| 1314 | /** |
| 1315 | * Wrapper for select/poll with timeout on a single file descriptor. |
| 1316 | * |
| 1317 | * flags (defined in net_util_md.h can be any combination of |
| 1318 | * NET_WAIT_READ, NET_WAIT_WRITE & NET_WAIT_CONNECT. |
| 1319 | * |
| 1320 | * The function will return when either the socket is ready for one |
| 1321 | * of the specified operation or the timeout expired. |
| 1322 | * |
| 1323 | * It returns the time left from the timeout (possibly 0), or -1 if it expired. |
| 1324 | */ |
| 1325 | |
| 1326 | jint |
| 1327 | NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout) |
| 1328 | { |
| 1329 | jlong prevTime = JVM_CurrentTimeMillis(env, 0); |
| 1330 | jint read_rv; |
| 1331 | |
| 1332 | while (1) { |
| 1333 | jlong newTime; |
| 1334 | #ifndef USE_SELECT |
| 1335 | { |
| 1336 | struct pollfd pfd; |
| 1337 | pfd.fd = fd; |
| 1338 | pfd.events = 0; |
| 1339 | if (flags & NET_WAIT_READ) |
| 1340 | pfd.events |= POLLIN; |
| 1341 | if (flags & NET_WAIT_WRITE) |
| 1342 | pfd.events |= POLLOUT; |
| 1343 | if (flags & NET_WAIT_CONNECT) |
| 1344 | pfd.events |= POLLOUT; |
| 1345 | |
| 1346 | errno = 0; |
| 1347 | read_rv = NET_Poll(&pfd, 1, timeout); |
| 1348 | } |
| 1349 | #else |
| 1350 | { |
| 1351 | fd_set rd, wr, ex; |
| 1352 | struct timeval t; |
| 1353 | |
| 1354 | t.tv_sec = timeout / 1000; |
| 1355 | t.tv_usec = (timeout % 1000) * 1000; |
| 1356 | |
| 1357 | FD_ZERO(&rd); |
| 1358 | FD_ZERO(&wr); |
| 1359 | FD_ZERO(&ex); |
| 1360 | if (flags & NET_WAIT_READ) { |
| 1361 | FD_SET(fd, &rd); |
| 1362 | } |
| 1363 | if (flags & NET_WAIT_WRITE) { |
| 1364 | FD_SET(fd, &wr); |
| 1365 | } |
| 1366 | if (flags & NET_WAIT_CONNECT) { |
| 1367 | FD_SET(fd, &wr); |
| 1368 | FD_SET(fd, &ex); |
| 1369 | } |
| 1370 | |
| 1371 | errno = 0; |
| 1372 | read_rv = NET_Select(fd+1, &rd, &wr, &ex, &t); |
| 1373 | } |
| 1374 | #endif |
| 1375 | |
| 1376 | newTime = JVM_CurrentTimeMillis(env, 0); |
| 1377 | timeout -= (newTime - prevTime); |
| 1378 | if (timeout <= 0) { |
| 1379 | return read_rv > 0 ? 0 : -1; |
| 1380 | } |
| 1381 | newTime = prevTime; |
| 1382 | |
| 1383 | if (read_rv > 0) { |
| 1384 | break; |
| 1385 | } |
| 1386 | |
| 1387 | |
| 1388 | } /* while */ |
| 1389 | |
| 1390 | return timeout; |
| 1391 | } |