The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "LocalSocketImpl" |
| 18 | |
| 19 | #include "JNIHelp.h" |
| 20 | #include "jni.h" |
| 21 | #include "utils/Log.h" |
| 22 | #include "utils/misc.h" |
| 23 | |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | #include <sys/types.h> |
| 27 | #include <sys/socket.h> |
| 28 | #include <sys/un.h> |
| 29 | #include <arpa/inet.h> |
| 30 | #include <netinet/in.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <errno.h> |
| 33 | #include <unistd.h> |
| 34 | #include <sys/ioctl.h> |
| 35 | |
| 36 | #include <cutils/sockets.h> |
| 37 | #include <netinet/tcp.h> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 38 | |
| 39 | namespace android { |
| 40 | |
| 41 | static jfieldID field_inboundFileDescriptors; |
| 42 | static jfieldID field_outboundFileDescriptors; |
| 43 | static jclass class_Credentials; |
| 44 | static jclass class_FileDescriptor; |
| 45 | static jmethodID method_CredentialsInit; |
| 46 | |
| 47 | /* |
| 48 | * private native FileDescriptor |
| 49 | * create_native(boolean stream) |
| 50 | * throws IOException; |
| 51 | */ |
| 52 | static jobject |
| 53 | socket_create (JNIEnv *env, jobject object, jboolean stream) |
| 54 | { |
| 55 | int ret; |
| 56 | |
| 57 | ret = socket(PF_LOCAL, stream ? SOCK_STREAM : SOCK_DGRAM, 0); |
| 58 | |
| 59 | if (ret < 0) { |
| 60 | jniThrowIOException(env, errno); |
| 61 | return NULL; |
| 62 | } |
| 63 | |
| 64 | return jniCreateFileDescriptor(env,ret); |
| 65 | } |
| 66 | |
| 67 | /* private native void connectLocal(FileDescriptor fd, |
| 68 | * String name, int namespace) throws IOException |
| 69 | */ |
| 70 | static void |
| 71 | socket_connect_local(JNIEnv *env, jobject object, |
| 72 | jobject fileDescriptor, jstring name, jint namespaceId) |
| 73 | { |
| 74 | int ret; |
| 75 | const char *nameUtf8; |
| 76 | int fd; |
| 77 | |
| 78 | nameUtf8 = env->GetStringUTFChars(name, NULL); |
| 79 | |
| 80 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 81 | |
| 82 | if (env->ExceptionOccurred() != NULL) { |
| 83 | return; |
| 84 | } |
| 85 | |
| 86 | ret = socket_local_client_connect( |
| 87 | fd, |
| 88 | nameUtf8, |
| 89 | namespaceId, |
| 90 | SOCK_STREAM); |
| 91 | |
| 92 | env->ReleaseStringUTFChars(name, nameUtf8); |
| 93 | |
| 94 | if (ret < 0) { |
| 95 | jniThrowIOException(env, errno); |
| 96 | return; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | #define DEFAULT_BACKLOG 4 |
| 101 | |
| 102 | /* private native void bindLocal(FileDescriptor fd, String name, namespace) |
| 103 | * throws IOException; |
| 104 | */ |
| 105 | |
| 106 | static void |
| 107 | socket_bind_local (JNIEnv *env, jobject object, jobject fileDescriptor, |
| 108 | jstring name, jint namespaceId) |
| 109 | { |
| 110 | int ret; |
| 111 | int fd; |
| 112 | const char *nameUtf8; |
| 113 | |
| 114 | |
| 115 | if (name == NULL) { |
| 116 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 117 | } |
| 118 | |
| 119 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 120 | |
| 121 | if (env->ExceptionOccurred() != NULL) { |
| 122 | return; |
| 123 | } |
| 124 | |
| 125 | nameUtf8 = env->GetStringUTFChars(name, NULL); |
| 126 | |
| 127 | ret = socket_local_server_bind(fd, nameUtf8, namespaceId); |
| 128 | |
| 129 | env->ReleaseStringUTFChars(name, nameUtf8); |
| 130 | |
| 131 | if (ret < 0) { |
| 132 | jniThrowIOException(env, errno); |
| 133 | return; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | /* private native void listen_native(int fd, int backlog) throws IOException; */ |
| 138 | static void |
| 139 | socket_listen (JNIEnv *env, jobject object, jobject fileDescriptor, int backlog) |
| 140 | { |
| 141 | int ret; |
| 142 | int fd; |
| 143 | |
| 144 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 145 | |
| 146 | if (env->ExceptionOccurred() != NULL) { |
| 147 | return; |
| 148 | } |
| 149 | |
| 150 | ret = listen(fd, backlog); |
| 151 | |
| 152 | if (ret < 0) { |
| 153 | jniThrowIOException(env, errno); |
| 154 | return; |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /* private native FileDescriptor |
| 159 | ** accept (FileDescriptor fd, LocalSocketImpl s) |
| 160 | ** throws IOException; |
| 161 | */ |
| 162 | static jobject |
| 163 | socket_accept (JNIEnv *env, jobject object, jobject fileDescriptor, jobject s) |
| 164 | { |
| 165 | union { |
| 166 | struct sockaddr address; |
| 167 | struct sockaddr_un un_address; |
| 168 | } sa; |
| 169 | |
| 170 | int ret; |
| 171 | int retFD; |
| 172 | int fd; |
| 173 | socklen_t addrlen; |
| 174 | |
| 175 | if (s == NULL) { |
| 176 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 177 | return NULL; |
| 178 | } |
| 179 | |
| 180 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 181 | |
| 182 | if (env->ExceptionOccurred() != NULL) { |
| 183 | return NULL; |
| 184 | } |
| 185 | |
| 186 | do { |
| 187 | addrlen = sizeof(sa); |
| 188 | ret = accept(fd, &(sa.address), &addrlen); |
| 189 | } while (ret < 0 && errno == EINTR); |
| 190 | |
| 191 | if (ret < 0) { |
| 192 | jniThrowIOException(env, errno); |
| 193 | return NULL; |
| 194 | } |
| 195 | |
| 196 | retFD = ret; |
| 197 | |
| 198 | return jniCreateFileDescriptor(env, retFD); |
| 199 | } |
| 200 | |
| 201 | /* private native void shutdown(FileDescriptor fd, boolean shutdownInput) */ |
| 202 | |
| 203 | static void |
| 204 | socket_shutdown (JNIEnv *env, jobject object, jobject fileDescriptor, |
| 205 | jboolean shutdownInput) |
| 206 | { |
| 207 | int ret; |
| 208 | int fd; |
| 209 | |
| 210 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 211 | |
| 212 | if (env->ExceptionOccurred() != NULL) { |
| 213 | return; |
| 214 | } |
| 215 | |
| 216 | ret = shutdown(fd, shutdownInput ? SHUT_RD : SHUT_WR); |
| 217 | |
| 218 | if (ret < 0) { |
| 219 | jniThrowIOException(env, errno); |
| 220 | return; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | static bool |
| 225 | java_opt_to_real(int optID, int* opt, int* level) |
| 226 | { |
| 227 | switch (optID) |
| 228 | { |
| 229 | case 4098: |
| 230 | *opt = SO_RCVBUF; |
| 231 | *level = SOL_SOCKET; |
| 232 | return true; |
| 233 | case 4097: |
| 234 | *opt = SO_SNDBUF; |
| 235 | *level = SOL_SOCKET; |
| 236 | return true; |
| 237 | case 4102: |
| 238 | *opt = SO_SNDTIMEO; |
| 239 | *level = SOL_SOCKET; |
| 240 | return true; |
| 241 | case 128: |
| 242 | *opt = SO_LINGER; |
| 243 | *level = SOL_SOCKET; |
| 244 | return true; |
| 245 | case 1: |
| 246 | *opt = TCP_NODELAY; |
| 247 | *level = IPPROTO_TCP; |
| 248 | return true; |
| 249 | case 4: |
| 250 | *opt = SO_REUSEADDR; |
| 251 | *level = SOL_SOCKET; |
| 252 | return true; |
| 253 | |
| 254 | } |
| 255 | return false; |
| 256 | } |
| 257 | |
| 258 | static jint |
| 259 | socket_getOption(JNIEnv *env, jobject object, jobject fileDescriptor, int optID) |
| 260 | { |
| 261 | int ret, value; |
| 262 | int opt, level; |
| 263 | int fd; |
| 264 | |
| 265 | socklen_t size = sizeof(int); |
| 266 | |
| 267 | if (!java_opt_to_real(optID, &opt, &level)) { |
| 268 | jniThrowIOException(env, -1); |
| 269 | return 0; |
| 270 | } |
| 271 | |
| 272 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 273 | |
| 274 | if (env->ExceptionOccurred() != NULL) { |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | switch (opt) |
| 279 | { |
| 280 | case SO_LINGER: |
| 281 | { |
| 282 | struct linger lingr; |
| 283 | size = sizeof(lingr); |
| 284 | ret = getsockopt(fd, level, opt, &lingr, &size); |
| 285 | if (!lingr.l_onoff) { |
| 286 | value = -1; |
| 287 | } else { |
| 288 | value = lingr.l_linger; |
| 289 | } |
| 290 | break; |
| 291 | } |
| 292 | default: |
| 293 | ret = getsockopt(fd, level, opt, &value, &size); |
| 294 | break; |
| 295 | } |
| 296 | |
| 297 | |
| 298 | if (ret != 0) { |
| 299 | jniThrowIOException(env, errno); |
| 300 | return 0; |
| 301 | } |
| 302 | |
| 303 | return value; |
| 304 | } |
| 305 | |
| 306 | static void socket_setOption( |
| 307 | JNIEnv *env, jobject object, jobject fileDescriptor, int optID, |
| 308 | jint boolValue, jint intValue) { |
| 309 | int ret; |
| 310 | int optname; |
| 311 | int level; |
| 312 | int fd; |
| 313 | |
| 314 | if (!java_opt_to_real(optID, &optname, &level)) { |
| 315 | jniThrowIOException(env, -1); |
| 316 | return; |
| 317 | } |
| 318 | |
| 319 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 320 | |
| 321 | if (env->ExceptionOccurred() != NULL) { |
| 322 | return; |
| 323 | } |
| 324 | |
| 325 | switch (optname) { |
| 326 | case SO_LINGER: { |
| 327 | /* |
| 328 | * SO_LINGER is special because it needs to use a special |
| 329 | * "linger" struct as well as use the incoming boolean |
| 330 | * argument specially. |
| 331 | */ |
| 332 | struct linger lingr; |
| 333 | lingr.l_onoff = boolValue ? 1 : 0; // Force it to be 0 or 1. |
| 334 | lingr.l_linger = intValue; |
| 335 | ret = setsockopt(fd, level, optname, &lingr, sizeof(lingr)); |
| 336 | break; |
| 337 | } |
| 338 | case SO_SNDTIMEO: { |
| 339 | /* |
| 340 | * SO_TIMEOUT from the core library gets converted to |
| 341 | * SO_SNDTIMEO, but the option is supposed to set both |
| 342 | * send and receive timeouts. Note: The incoming timeout |
| 343 | * value is in milliseconds. |
| 344 | */ |
| 345 | struct timeval timeout; |
| 346 | timeout.tv_sec = intValue / 1000; |
| 347 | timeout.tv_usec = (intValue % 1000) * 1000; |
| 348 | |
| 349 | ret = setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, |
| 350 | (void *)&timeout, sizeof(timeout)); |
| 351 | |
| 352 | if (ret == 0) { |
| 353 | ret = setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, |
| 354 | (void *)&timeout, sizeof(timeout)); |
| 355 | } |
| 356 | |
| 357 | break; |
| 358 | } |
| 359 | default: { |
| 360 | /* |
| 361 | * In all other cases, the translated option level and |
| 362 | * optname may be used directly for a call to setsockopt(). |
| 363 | */ |
| 364 | ret = setsockopt(fd, level, optname, &intValue, sizeof(intValue)); |
| 365 | break; |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | if (ret != 0) { |
| 370 | jniThrowIOException(env, errno); |
| 371 | return; |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | static jint socket_available (JNIEnv *env, jobject object, |
| 376 | jobject fileDescriptor) |
| 377 | { |
| 378 | int fd; |
| 379 | |
| 380 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 381 | |
| 382 | if (env->ExceptionOccurred() != NULL) { |
| 383 | return (jint)-1; |
| 384 | } |
| 385 | |
| 386 | #if 1 |
| 387 | int avail; |
| 388 | int ret = ioctl(fd, FIONREAD, &avail); |
| 389 | |
| 390 | // If this were a non-socket fd, there would be other cases to worry |
| 391 | // about... |
| 392 | |
| 393 | if (ret < 0) { |
| 394 | jniThrowIOException(env, errno); |
| 395 | return (jint) 0; |
| 396 | } |
| 397 | |
| 398 | return (jint)avail; |
| 399 | #else |
| 400 | // there appears to be a bionic bug that prevents this version from working. |
| 401 | |
| 402 | ssize_t ret; |
| 403 | struct msghdr msg; |
| 404 | |
| 405 | memset(&msg, 0, sizeof(msg)); |
| 406 | |
| 407 | do { |
| 408 | ret = recvmsg(fd, &msg, MSG_PEEK | MSG_DONTWAIT | MSG_NOSIGNAL); |
| 409 | } while (ret < 0 && errno == EINTR); |
| 410 | |
| 411 | |
| 412 | // MSG_PEEK returns 0 on EOF and EWOULDBLOCK on none available |
| 413 | if (ret < 0 && errno == EWOULDBLOCK) { |
| 414 | return 0; |
| 415 | } if (ret < 0) { |
| 416 | jniThrowIOException(env, errno); |
| 417 | return -1; |
| 418 | } |
| 419 | |
| 420 | return (jint)ret; |
| 421 | #endif |
| 422 | } |
| 423 | |
| 424 | static void socket_close (JNIEnv *env, jobject object, jobject fileDescriptor) |
| 425 | { |
| 426 | int fd; |
| 427 | int err; |
| 428 | |
| 429 | if (fileDescriptor == NULL) { |
| 430 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 431 | return; |
| 432 | } |
| 433 | |
| 434 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 435 | |
| 436 | if (env->ExceptionOccurred() != NULL) { |
| 437 | return; |
| 438 | } |
| 439 | |
| 440 | do { |
| 441 | err = close(fd); |
| 442 | } while (err < 0 && errno == EINTR); |
| 443 | |
| 444 | if (err < 0) { |
| 445 | jniThrowIOException(env, errno); |
| 446 | return; |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * Processes ancillary data, handling only |
| 452 | * SCM_RIGHTS. Creates appropriate objects and sets appropriate |
| 453 | * fields in the LocalSocketImpl object. Returns 0 on success |
| 454 | * or -1 if an exception was thrown. |
| 455 | */ |
| 456 | static int socket_process_cmsg(JNIEnv *env, jobject thisJ, struct msghdr * pMsg) |
| 457 | { |
| 458 | struct cmsghdr *cmsgptr; |
| 459 | |
| 460 | for (cmsgptr = CMSG_FIRSTHDR(pMsg); |
| 461 | cmsgptr != NULL; cmsgptr = CMSG_NXTHDR(pMsg, cmsgptr)) { |
| 462 | |
| 463 | if (cmsgptr->cmsg_level != SOL_SOCKET) { |
| 464 | continue; |
| 465 | } |
| 466 | |
| 467 | if (cmsgptr->cmsg_type == SCM_RIGHTS) { |
| 468 | int *pDescriptors = (int *)CMSG_DATA(cmsgptr); |
| 469 | jobjectArray fdArray; |
| 470 | int count |
| 471 | = ((cmsgptr->cmsg_len - CMSG_LEN(0)) / sizeof(int)); |
| 472 | |
| 473 | if (count < 0) { |
| 474 | jniThrowException(env, "java/io/IOException", |
| 475 | "invalid cmsg length"); |
| 476 | } |
| 477 | |
| 478 | fdArray = env->NewObjectArray(count, class_FileDescriptor, NULL); |
| 479 | |
| 480 | if (fdArray == NULL) { |
| 481 | return -1; |
| 482 | } |
| 483 | |
| 484 | for (int i = 0; i < count; i++) { |
| 485 | jobject fdObject |
| 486 | = jniCreateFileDescriptor(env, pDescriptors[i]); |
| 487 | |
| 488 | if (env->ExceptionOccurred() != NULL) { |
| 489 | return -1; |
| 490 | } |
| 491 | |
| 492 | env->SetObjectArrayElement(fdArray, i, fdObject); |
| 493 | |
| 494 | if (env->ExceptionOccurred() != NULL) { |
| 495 | return -1; |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | env->SetObjectField(thisJ, field_inboundFileDescriptors, fdArray); |
| 500 | |
| 501 | if (env->ExceptionOccurred() != NULL) { |
| 502 | return -1; |
| 503 | } |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | /** |
| 511 | * Reads data from a socket into buf, processing any ancillary data |
| 512 | * and adding it to thisJ. |
| 513 | * |
| 514 | * Returns the length of normal data read, or -1 if an exception has |
| 515 | * been thrown in this function. |
| 516 | */ |
| 517 | static ssize_t socket_read_all(JNIEnv *env, jobject thisJ, int fd, |
| 518 | void *buffer, size_t len) |
| 519 | { |
| 520 | ssize_t ret; |
| 521 | ssize_t bytesread = 0; |
| 522 | struct msghdr msg; |
| 523 | struct iovec iv; |
| 524 | unsigned char *buf = (unsigned char *)buffer; |
| 525 | // Enough buffer for a pile of fd's. We throw an exception if |
| 526 | // this buffer is too small. |
| 527 | struct cmsghdr cmsgbuf[2*sizeof(cmsghdr) + 0x100]; |
| 528 | |
| 529 | memset(&msg, 0, sizeof(msg)); |
| 530 | memset(&iv, 0, sizeof(iv)); |
| 531 | |
| 532 | iv.iov_base = buf; |
| 533 | iv.iov_len = len; |
| 534 | |
| 535 | msg.msg_iov = &iv; |
| 536 | msg.msg_iovlen = 1; |
| 537 | msg.msg_control = cmsgbuf; |
| 538 | msg.msg_controllen = sizeof(cmsgbuf); |
| 539 | |
| 540 | do { |
| 541 | ret = recvmsg(fd, &msg, MSG_NOSIGNAL); |
| 542 | } while (ret < 0 && errno == EINTR); |
| 543 | |
| 544 | if (ret < 0 && errno == EPIPE) { |
| 545 | // Treat this as an end of stream |
| 546 | return 0; |
| 547 | } |
| 548 | |
| 549 | if (ret < 0) { |
| 550 | jniThrowIOException(env, errno); |
| 551 | return -1; |
| 552 | } |
| 553 | |
| 554 | if ((msg.msg_flags & (MSG_CTRUNC | MSG_OOB | MSG_ERRQUEUE)) != 0) { |
| 555 | // To us, any of the above flags are a fatal error |
| 556 | |
| 557 | jniThrowException(env, "java/io/IOException", |
| 558 | "Unexpected error or truncation during recvmsg()"); |
| 559 | |
| 560 | return -1; |
| 561 | } |
| 562 | |
| 563 | if (ret >= 0) { |
| 564 | socket_process_cmsg(env, thisJ, &msg); |
| 565 | } |
| 566 | |
| 567 | return ret; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * Writes all the data in the specified buffer to the specified socket. |
| 572 | * |
| 573 | * Returns 0 on success or -1 if an exception was thrown. |
| 574 | */ |
| 575 | static int socket_write_all(JNIEnv *env, jobject object, int fd, |
| 576 | void *buf, size_t len) |
| 577 | { |
| 578 | ssize_t ret; |
| 579 | struct msghdr msg; |
| 580 | unsigned char *buffer = (unsigned char *)buf; |
| 581 | memset(&msg, 0, sizeof(msg)); |
| 582 | |
| 583 | jobjectArray outboundFds |
| 584 | = (jobjectArray)env->GetObjectField( |
| 585 | object, field_outboundFileDescriptors); |
| 586 | |
| 587 | if (env->ExceptionOccurred() != NULL) { |
| 588 | return -1; |
| 589 | } |
| 590 | |
| 591 | struct cmsghdr *cmsg; |
| 592 | int countFds = outboundFds == NULL ? 0 : env->GetArrayLength(outboundFds); |
| 593 | int fds[countFds]; |
| 594 | char msgbuf[CMSG_SPACE(countFds)]; |
| 595 | |
| 596 | // Add any pending outbound file descriptors to the message |
| 597 | if (outboundFds != NULL) { |
| 598 | |
| 599 | if (env->ExceptionOccurred() != NULL) { |
| 600 | return -1; |
| 601 | } |
| 602 | |
| 603 | for (int i = 0; i < countFds; i++) { |
| 604 | jobject fdObject = env->GetObjectArrayElement(outboundFds, i); |
| 605 | if (env->ExceptionOccurred() != NULL) { |
| 606 | return -1; |
| 607 | } |
| 608 | |
| 609 | fds[i] = jniGetFDFromFileDescriptor(env, fdObject); |
| 610 | if (env->ExceptionOccurred() != NULL) { |
| 611 | return -1; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | // See "man cmsg" really |
| 616 | msg.msg_control = msgbuf; |
| 617 | msg.msg_controllen = sizeof msgbuf; |
| 618 | cmsg = CMSG_FIRSTHDR(&msg); |
| 619 | cmsg->cmsg_level = SOL_SOCKET; |
| 620 | cmsg->cmsg_type = SCM_RIGHTS; |
| 621 | cmsg->cmsg_len = CMSG_LEN(sizeof fds); |
| 622 | memcpy(CMSG_DATA(cmsg), fds, sizeof fds); |
| 623 | } |
| 624 | |
| 625 | // We only write our msg_control during the first write |
| 626 | while (len > 0) { |
| 627 | struct iovec iv; |
| 628 | memset(&iv, 0, sizeof(iv)); |
| 629 | |
| 630 | iv.iov_base = buffer; |
| 631 | iv.iov_len = len; |
| 632 | |
| 633 | msg.msg_iov = &iv; |
| 634 | msg.msg_iovlen = 1; |
| 635 | |
| 636 | do { |
| 637 | ret = sendmsg(fd, &msg, MSG_NOSIGNAL); |
| 638 | } while (ret < 0 && errno == EINTR); |
| 639 | |
| 640 | if (ret < 0) { |
| 641 | jniThrowIOException(env, errno); |
| 642 | return -1; |
| 643 | } |
| 644 | |
| 645 | buffer += ret; |
| 646 | len -= ret; |
| 647 | |
| 648 | // Wipes out any msg_control too |
| 649 | memset(&msg, 0, sizeof(msg)); |
| 650 | } |
| 651 | |
| 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | static jint socket_read (JNIEnv *env, jobject object, jobject fileDescriptor) |
| 656 | { |
| 657 | int fd; |
| 658 | int err; |
| 659 | |
| 660 | if (fileDescriptor == NULL) { |
| 661 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 662 | return (jint)-1; |
| 663 | } |
| 664 | |
| 665 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 666 | |
| 667 | if (env->ExceptionOccurred() != NULL) { |
| 668 | return (jint)0; |
| 669 | } |
| 670 | |
| 671 | unsigned char buf; |
| 672 | |
| 673 | err = socket_read_all(env, object, fd, &buf, 1); |
| 674 | |
| 675 | if (err < 0) { |
| 676 | jniThrowIOException(env, errno); |
| 677 | return (jint)0; |
| 678 | } |
| 679 | |
| 680 | if (err == 0) { |
| 681 | // end of file |
| 682 | return (jint)-1; |
| 683 | } |
| 684 | |
| 685 | return (jint)buf; |
| 686 | } |
| 687 | |
| 688 | static jint socket_readba (JNIEnv *env, jobject object, |
| 689 | jbyteArray buffer, jint off, jint len, jobject fileDescriptor) |
| 690 | { |
| 691 | int fd; |
| 692 | jbyte* byteBuffer; |
| 693 | int ret; |
| 694 | |
| 695 | if (fileDescriptor == NULL || buffer == NULL) { |
| 696 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 697 | return (jint)-1; |
| 698 | } |
| 699 | |
| 700 | if (off < 0 || len < 0 || (off + len) > env->GetArrayLength(buffer)) { |
| 701 | jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL); |
| 702 | return (jint)-1; |
| 703 | } |
| 704 | |
| 705 | if (len == 0) { |
| 706 | // because socket_read_all returns 0 on EOF |
| 707 | return 0; |
| 708 | } |
| 709 | |
| 710 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 711 | |
| 712 | if (env->ExceptionOccurred() != NULL) { |
| 713 | return (jint)-1; |
| 714 | } |
| 715 | |
| 716 | byteBuffer = env->GetByteArrayElements(buffer, NULL); |
| 717 | |
| 718 | if (NULL == byteBuffer) { |
| 719 | // an exception will have been thrown |
| 720 | return (jint)-1; |
| 721 | } |
| 722 | |
| 723 | ret = socket_read_all(env, object, |
| 724 | fd, byteBuffer + off, len); |
| 725 | |
| 726 | // A return of -1 above means an exception is pending |
| 727 | |
| 728 | env->ReleaseByteArrayElements(buffer, byteBuffer, 0); |
| 729 | |
| 730 | return (jint) ((ret == 0) ? -1 : ret); |
| 731 | } |
| 732 | |
| 733 | static void socket_write (JNIEnv *env, jobject object, |
| 734 | jint b, jobject fileDescriptor) |
| 735 | { |
| 736 | int fd; |
| 737 | int err; |
| 738 | |
| 739 | if (fileDescriptor == NULL) { |
| 740 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 741 | return; |
| 742 | } |
| 743 | |
| 744 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 745 | |
| 746 | if (env->ExceptionOccurred() != NULL) { |
| 747 | return; |
| 748 | } |
| 749 | |
| 750 | err = socket_write_all(env, object, fd, &b, 1); |
| 751 | |
| 752 | // A return of -1 above means an exception is pending |
| 753 | } |
| 754 | |
| 755 | static void socket_writeba (JNIEnv *env, jobject object, |
| 756 | jbyteArray buffer, jint off, jint len, jobject fileDescriptor) |
| 757 | { |
| 758 | int fd; |
| 759 | int err; |
| 760 | jbyte* byteBuffer; |
| 761 | |
| 762 | if (fileDescriptor == NULL || buffer == NULL) { |
| 763 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 764 | return; |
| 765 | } |
| 766 | |
| 767 | if (off < 0 || len < 0 || (off + len) > env->GetArrayLength(buffer)) { |
| 768 | jniThrowException(env, "java/lang/ArrayIndexOutOfBoundsException", NULL); |
| 769 | return; |
| 770 | } |
| 771 | |
| 772 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 773 | |
| 774 | if (env->ExceptionOccurred() != NULL) { |
| 775 | return; |
| 776 | } |
| 777 | |
| 778 | byteBuffer = env->GetByteArrayElements(buffer,NULL); |
| 779 | |
| 780 | if (NULL == byteBuffer) { |
| 781 | // an exception will have been thrown |
| 782 | return; |
| 783 | } |
| 784 | |
| 785 | err = socket_write_all(env, object, fd, |
| 786 | byteBuffer + off, len); |
| 787 | |
| 788 | // A return of -1 above means an exception is pending |
| 789 | |
| 790 | env->ReleaseByteArrayElements(buffer, byteBuffer, JNI_ABORT); |
| 791 | } |
| 792 | |
| 793 | static jobject socket_get_peer_credentials(JNIEnv *env, |
| 794 | jobject object, jobject fileDescriptor) |
| 795 | { |
| 796 | int err; |
| 797 | int fd; |
| 798 | |
| 799 | if (fileDescriptor == NULL) { |
| 800 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 801 | return NULL; |
| 802 | } |
| 803 | |
| 804 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 805 | |
| 806 | if (env->ExceptionOccurred() != NULL) { |
| 807 | return NULL; |
| 808 | } |
| 809 | |
| 810 | struct ucred creds; |
| 811 | |
| 812 | memset(&creds, 0, sizeof(creds)); |
| 813 | socklen_t szCreds = sizeof(creds); |
| 814 | |
| 815 | err = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &creds, &szCreds); |
| 816 | |
| 817 | if (err < 0) { |
| 818 | jniThrowIOException(env, errno); |
| 819 | return NULL; |
| 820 | } |
| 821 | |
| 822 | if (szCreds == 0) { |
| 823 | return NULL; |
| 824 | } |
| 825 | |
| 826 | return env->NewObject(class_Credentials, method_CredentialsInit, |
| 827 | creds.pid, creds.uid, creds.gid); |
| 828 | } |
| 829 | |
| 830 | #if 0 |
| 831 | //TODO change this to return an instance of LocalSocketAddress |
| 832 | static jobject socket_getSockName(JNIEnv *env, |
| 833 | jobject object, jobject fileDescriptor) |
| 834 | { |
| 835 | int err; |
| 836 | int fd; |
| 837 | |
| 838 | if (fileDescriptor == NULL) { |
| 839 | jniThrowException(env, "java/lang/NullPointerException", NULL); |
| 840 | return NULL; |
| 841 | } |
| 842 | |
| 843 | fd = jniGetFDFromFileDescriptor(env, fileDescriptor); |
| 844 | |
| 845 | if (env->ExceptionOccurred() != NULL) { |
| 846 | return NULL; |
| 847 | } |
| 848 | |
| 849 | union { |
| 850 | struct sockaddr address; |
| 851 | struct sockaddr_un un_address; |
| 852 | } sa; |
| 853 | |
| 854 | memset(&sa, 0, sizeof(sa)); |
| 855 | |
| 856 | socklen_t namelen = sizeof(sa); |
| 857 | err = getsockname(fd, &(sa.address), &namelen); |
| 858 | |
| 859 | if (err < 0) { |
| 860 | jniThrowIOException(env, errno); |
| 861 | return NULL; |
| 862 | } |
| 863 | |
| 864 | if (sa.address.sa_family != AF_UNIX) { |
| 865 | // We think we're an impl only for AF_UNIX, so this should never happen. |
| 866 | |
| 867 | jniThrowIOException(env, EINVAL); |
| 868 | return NULL; |
| 869 | } |
| 870 | |
| 871 | if (sa.un_address.sun_path[0] == '\0') { |
| 872 | } else { |
| 873 | } |
| 874 | |
| 875 | |
| 876 | |
| 877 | |
| 878 | } |
| 879 | #endif |
| 880 | |
| 881 | /* |
| 882 | * JNI registration. |
| 883 | */ |
| 884 | static JNINativeMethod gMethods[] = { |
| 885 | /* name, signature, funcPtr */ |
| 886 | {"getOption_native", "(Ljava/io/FileDescriptor;I)I", (void*)socket_getOption}, |
| 887 | {"setOption_native", "(Ljava/io/FileDescriptor;III)V", (void*)socket_setOption}, |
| 888 | {"create_native", "(Z)Ljava/io/FileDescriptor;", (void*)socket_create}, |
| 889 | {"connectLocal", "(Ljava/io/FileDescriptor;Ljava/lang/String;I)V", |
| 890 | (void*)socket_connect_local}, |
| 891 | {"bindLocal", "(Ljava/io/FileDescriptor;Ljava/lang/String;I)V", (void*)socket_bind_local}, |
| 892 | {"listen_native", "(Ljava/io/FileDescriptor;I)V", (void*)socket_listen}, |
| 893 | {"accept", "(Ljava/io/FileDescriptor;Landroid/net/LocalSocketImpl;)Ljava/io/FileDescriptor;", (void*)socket_accept}, |
| 894 | {"shutdown", "(Ljava/io/FileDescriptor;Z)V", (void*)socket_shutdown}, |
| 895 | {"available_native", "(Ljava/io/FileDescriptor;)I", (void*) socket_available}, |
| 896 | {"close_native", "(Ljava/io/FileDescriptor;)V", (void*) socket_close}, |
| 897 | {"read_native", "(Ljava/io/FileDescriptor;)I", (void*) socket_read}, |
| 898 | {"readba_native", "([BIILjava/io/FileDescriptor;)I", (void*) socket_readba}, |
| 899 | {"writeba_native", "([BIILjava/io/FileDescriptor;)V", (void*) socket_writeba}, |
| 900 | {"write_native", "(ILjava/io/FileDescriptor;)V", (void*) socket_write}, |
| 901 | {"getPeerCredentials_native", |
| 902 | "(Ljava/io/FileDescriptor;)Landroid/net/Credentials;", |
| 903 | (void*) socket_get_peer_credentials} |
| 904 | //,{"getSockName_native", "(Ljava/io/FileDescriptor;)Ljava/lang/String;", |
| 905 | // (void *) socket_getSockName} |
| 906 | |
| 907 | }; |
| 908 | |
| 909 | int register_android_net_LocalSocketImpl(JNIEnv *env) |
| 910 | { |
| 911 | jclass clazz; |
| 912 | |
| 913 | clazz = env->FindClass("android/net/LocalSocketImpl"); |
| 914 | |
| 915 | if (clazz == NULL) { |
| 916 | goto error; |
| 917 | } |
| 918 | |
| 919 | field_inboundFileDescriptors = env->GetFieldID(clazz, |
| 920 | "inboundFileDescriptors", "[Ljava/io/FileDescriptor;"); |
| 921 | |
| 922 | if (field_inboundFileDescriptors == NULL) { |
| 923 | goto error; |
| 924 | } |
| 925 | |
| 926 | field_outboundFileDescriptors = env->GetFieldID(clazz, |
| 927 | "outboundFileDescriptors", "[Ljava/io/FileDescriptor;"); |
| 928 | |
| 929 | if (field_outboundFileDescriptors == NULL) { |
| 930 | goto error; |
| 931 | } |
| 932 | |
| 933 | class_Credentials = env->FindClass("android/net/Credentials"); |
| 934 | |
| 935 | if (class_Credentials == NULL) { |
| 936 | goto error; |
| 937 | } |
| 938 | |
| 939 | class_Credentials = (jclass)env->NewGlobalRef(class_Credentials); |
| 940 | |
| 941 | class_FileDescriptor = env->FindClass("java/io/FileDescriptor"); |
| 942 | |
| 943 | if (class_FileDescriptor == NULL) { |
| 944 | goto error; |
| 945 | } |
| 946 | |
| 947 | class_FileDescriptor = (jclass)env->NewGlobalRef(class_FileDescriptor); |
| 948 | |
| 949 | method_CredentialsInit |
| 950 | = env->GetMethodID(class_Credentials, "<init>", "(III)V"); |
| 951 | |
| 952 | if (method_CredentialsInit == NULL) { |
| 953 | goto error; |
| 954 | } |
| 955 | |
| 956 | return jniRegisterNativeMethods(env, |
| 957 | "android/net/LocalSocketImpl", gMethods, NELEM(gMethods)); |
| 958 | |
| 959 | error: |
| 960 | LOGE("Error registering android.net.LocalSocketImpl"); |
| 961 | return -1; |
| 962 | } |
| 963 | |
| 964 | }; |