| 1 | /* |
| 2 | * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <algorithm> |
| 9 | #include <common/compat/fcntl.hpp> |
| 10 | #include <common/sessiond-comm/sessiond-comm.hpp> |
| 11 | #include <common/payload.hpp> |
| 12 | #include <common/payload-view.hpp> |
| 13 | #include <common/unix.hpp> |
| 14 | #include <common/utils.hpp> |
| 15 | #include <common/defaults.hpp> |
| 16 | #include <tap/tap.h> |
| 17 | #include <stdbool.h> |
| 18 | #include <common/error.hpp> |
| 19 | #include <lttng/constant.h> |
| 20 | #include <stdio.h> |
| 21 | #include <pthread.h> |
| 22 | #include <unistd.h> |
| 23 | #include <sys/wait.h> |
| 24 | #include <stdlib.h> |
| 25 | |
| 26 | #define HIGH_FD_COUNT LTTCOMM_MAX_SEND_FDS |
| 27 | #define MESSAGE_COUNT 4 |
| 28 | #define LARGE_PAYLOAD_SIZE 4 * 1024 |
| 29 | #define LARGE_PAYLOAD_RECV_SIZE 100 |
| 30 | |
| 31 | static const int TEST_COUNT = 37; |
| 32 | |
| 33 | /* For error.h */ |
| 34 | int lttng_opt_quiet; |
| 35 | int lttng_opt_verbose; |
| 36 | int lttng_opt_mi; |
| 37 | |
| 38 | /* |
| 39 | * Validate that a large number of file descriptors can be received in one shot. |
| 40 | */ |
| 41 | static void test_high_fd_count(unsigned int fd_count) |
| 42 | { |
| 43 | int sockets[2] = {-1, -1}; |
| 44 | int ret; |
| 45 | unsigned int i; |
| 46 | const unsigned int payload_content = 42; |
| 47 | struct lttng_payload sent_payload; |
| 48 | struct lttng_payload received_payload; |
| 49 | |
| 50 | diag("Send and receive high FD count atomically (%u FDs)", fd_count); |
| 51 | lttng_payload_init(&sent_payload); |
| 52 | lttng_payload_init(&received_payload); |
| 53 | |
| 54 | ret = lttcomm_create_anon_unix_socketpair(sockets); |
| 55 | ok(ret == 0, "Created anonymous unix socket pair"); |
| 56 | if (ret < 0) { |
| 57 | PERROR("Failed to create an anonymous pair of unix sockets"); |
| 58 | goto error; |
| 59 | } |
| 60 | |
| 61 | /* Add dummy content to payload. */ |
| 62 | ret = lttng_dynamic_buffer_append(&sent_payload.buffer, |
| 63 | &payload_content, sizeof(payload_content)); |
| 64 | if (ret) { |
| 65 | PERROR("Failed to initialize test payload"); |
| 66 | goto error; |
| 67 | } |
| 68 | |
| 69 | for (i = 0; i < fd_count; i++) { |
| 70 | struct fd_handle *handle; |
| 71 | int fd = fcntl(STDOUT_FILENO, F_DUPFD, 0); |
| 72 | |
| 73 | if (fd < 0) { |
| 74 | PERROR("Failed to create fd while creating test payload"); |
| 75 | goto error; |
| 76 | } |
| 77 | |
| 78 | handle = fd_handle_create(fd); |
| 79 | if (!handle) { |
| 80 | if (close(fd)) { |
| 81 | PERROR("Failed to close fd while preparing test payload"); |
| 82 | goto error; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | ret = lttng_payload_push_fd_handle(&sent_payload, handle); |
| 87 | fd_handle_put(handle); |
| 88 | if (ret) { |
| 89 | PERROR("Failed to add fd handle to test payload"); |
| 90 | goto error; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | /* Send payload. */ |
| 95 | { |
| 96 | ssize_t sock_ret; |
| 97 | struct lttng_payload_view pv = lttng_payload_view_from_payload( |
| 98 | &sent_payload, 0, -1); |
| 99 | |
| 100 | /* Not expected to block considering the size of the payload. */ |
| 101 | sock_ret = lttcomm_send_unix_sock( |
| 102 | sockets[0], pv.buffer.data, pv.buffer.size); |
| 103 | ok(sock_ret == pv.buffer.size, "Sent complete test payload"); |
| 104 | if (sock_ret != pv.buffer.size) { |
| 105 | ERR("Failed to send test payload bytes: ret = %zd, expected = %zu", |
| 106 | sock_ret, pv.buffer.size); |
| 107 | goto error; |
| 108 | } |
| 109 | |
| 110 | sock_ret = lttcomm_send_payload_view_fds_unix_sock( |
| 111 | sockets[0], &pv); |
| 112 | ok(sock_ret == 1, "Sent test payload file descriptors"); |
| 113 | if (sock_ret != 1) { |
| 114 | if (sock_ret < 0) { |
| 115 | PERROR("Failed to send test payload file descriptors: ret = %zd, expected = %d", |
| 116 | sock_ret, 1); |
| 117 | } else { |
| 118 | diag("Failed to send test payload file descriptors: ret = %zd, expected = %d", |
| 119 | sock_ret, 1); |
| 120 | } |
| 121 | |
| 122 | goto error; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | /* Receive payload */ |
| 127 | { |
| 128 | ssize_t sock_ret; |
| 129 | |
| 130 | ret = lttng_dynamic_buffer_set_size(&received_payload.buffer, |
| 131 | sent_payload.buffer.size); |
| 132 | if (ret) { |
| 133 | PERROR("Failed to pre-allocate reception buffer"); |
| 134 | goto error; |
| 135 | } |
| 136 | |
| 137 | sock_ret = lttcomm_recv_unix_sock(sockets[1], |
| 138 | received_payload.buffer.data, |
| 139 | received_payload.buffer.size); |
| 140 | ok(sock_ret == received_payload.buffer.size, |
| 141 | "Received payload bytes"); |
| 142 | if (sock_ret != received_payload.buffer.size) { |
| 143 | ERR("Failed to receive payload bytes: ret = %zd, expected = %zu", |
| 144 | sock_ret, received_payload.buffer.size); |
| 145 | goto error; |
| 146 | } |
| 147 | |
| 148 | sock_ret = lttcomm_recv_payload_fds_unix_sock( |
| 149 | sockets[1], fd_count, &received_payload); |
| 150 | ok(sock_ret == (int) (sizeof(int) * fd_count), |
| 151 | "FD reception return value is number of fd * sizeof(int)"); |
| 152 | if (sock_ret != (int) (sizeof(int) * fd_count)) { |
| 153 | ERR("Failed to receive test payload file descriptors: ret = %zd, expected = %d", |
| 154 | sock_ret, |
| 155 | (int) (fd_count * sizeof(int))); |
| 156 | goto error; |
| 157 | } |
| 158 | |
| 159 | { |
| 160 | const struct lttng_payload_view pv = |
| 161 | lttng_payload_view_from_payload( |
| 162 | &received_payload, 0, |
| 163 | -1); |
| 164 | const int fd_handle_count = |
| 165 | lttng_payload_view_get_fd_handle_count( |
| 166 | &pv); |
| 167 | |
| 168 | ok(fd_handle_count == fd_count, |
| 169 | "Received all test payload file descriptors in one invocation"); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | error: |
| 174 | for (i = 0; i < 2; i++) { |
| 175 | if (sockets[i] < 0) { |
| 176 | continue; |
| 177 | } |
| 178 | |
| 179 | if (close(sockets[i])) { |
| 180 | PERROR("Failed to close unix socket"); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | lttng_payload_reset(&sent_payload); |
| 185 | lttng_payload_reset(&received_payload); |
| 186 | } |
| 187 | |
| 188 | /* |
| 189 | * Validate that if the sender sent multiple messages, each containing 1 fd, |
| 190 | * the receiver can receive one message at a time (the binary payload and its |
| 191 | * fd) and is not forced to receive all file descriptors at once. |
| 192 | */ |
| 193 | static void test_one_fd_per_message(unsigned int message_count) |
| 194 | { |
| 195 | const unsigned int payload_content = 42; |
| 196 | int sockets[2] = {-1, -1}; |
| 197 | int ret; |
| 198 | unsigned int i; |
| 199 | struct lttng_payload sent_payload; |
| 200 | struct lttng_payload received_payload; |
| 201 | |
| 202 | diag("Send and receive small messages with one FD each (%u messages)", |
| 203 | message_count); |
| 204 | lttng_payload_init(&sent_payload); |
| 205 | lttng_payload_init(&received_payload); |
| 206 | |
| 207 | ret = lttcomm_create_anon_unix_socketpair(sockets); |
| 208 | ok(ret == 0, "Created anonymous unix socket pair"); |
| 209 | if (ret < 0) { |
| 210 | PERROR("Failed to create an anonymous pair of unix sockets"); |
| 211 | goto error; |
| 212 | } |
| 213 | |
| 214 | /* Send messages with one fd each. */ |
| 215 | for (i = 0; i < message_count; i++) { |
| 216 | struct fd_handle *handle; |
| 217 | int fd; |
| 218 | |
| 219 | /* Add dummy content to payload. */ |
| 220 | ret = lttng_dynamic_buffer_append(&sent_payload.buffer, |
| 221 | &payload_content, sizeof(payload_content)); |
| 222 | if (ret) { |
| 223 | PERROR("Failed to initialize test payload"); |
| 224 | goto error; |
| 225 | } |
| 226 | |
| 227 | fd = fcntl(STDOUT_FILENO, F_DUPFD, 0); |
| 228 | if (fd < 0) { |
| 229 | PERROR("Failed to create fd while creating test payload"); |
| 230 | goto error; |
| 231 | } |
| 232 | |
| 233 | handle = fd_handle_create(fd); |
| 234 | if (!handle) { |
| 235 | if (close(fd)) { |
| 236 | PERROR("Failed to close fd while preparing test payload"); |
| 237 | goto error; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | ret = lttng_payload_push_fd_handle(&sent_payload, handle); |
| 242 | fd_handle_put(handle); |
| 243 | if (ret) { |
| 244 | PERROR("Failed to add fd handle to test payload"); |
| 245 | goto error; |
| 246 | } |
| 247 | |
| 248 | /* Send payload. */ |
| 249 | { |
| 250 | ssize_t sock_ret; |
| 251 | struct lttng_payload_view pv = |
| 252 | lttng_payload_view_from_payload( |
| 253 | &sent_payload, 0, -1); |
| 254 | |
| 255 | /* Not expected to block considering the size of the |
| 256 | * payload. */ |
| 257 | sock_ret = lttcomm_send_unix_sock(sockets[0], |
| 258 | pv.buffer.data, pv.buffer.size); |
| 259 | ok(sock_ret == pv.buffer.size, |
| 260 | "Sent binary payload for message %u", |
| 261 | i); |
| 262 | if (sock_ret != pv.buffer.size) { |
| 263 | ERR("Failed to send test payload bytes: ret = %zd, expected = %zu", |
| 264 | sock_ret, pv.buffer.size); |
| 265 | goto error; |
| 266 | } |
| 267 | |
| 268 | sock_ret = lttcomm_send_payload_view_fds_unix_sock( |
| 269 | sockets[0], &pv); |
| 270 | ok(sock_ret == 1, |
| 271 | "Sent file descriptors payload for message %u", |
| 272 | i); |
| 273 | if (sock_ret != 1) { |
| 274 | if (sock_ret < 0) { |
| 275 | PERROR("Failed to send test payload file descriptors: ret = %zd, expected = %d", |
| 276 | sock_ret, 1); |
| 277 | } else { |
| 278 | diag("Failed to send test payload file descriptors: ret = %zd, expected = %d", |
| 279 | sock_ret, 1); |
| 280 | } |
| 281 | |
| 282 | goto error; |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | lttng_payload_clear(&sent_payload); |
| 287 | } |
| 288 | |
| 289 | /* Receive messages one at a time. */ |
| 290 | for (i = 0; i < message_count; i++) { |
| 291 | ssize_t sock_ret; |
| 292 | |
| 293 | ret = lttng_dynamic_buffer_set_size(&received_payload.buffer, |
| 294 | sizeof(payload_content)); |
| 295 | if (ret) { |
| 296 | PERROR("Failed to pre-allocate reception buffer"); |
| 297 | goto error; |
| 298 | } |
| 299 | |
| 300 | sock_ret = lttcomm_recv_unix_sock(sockets[1], |
| 301 | received_payload.buffer.data, |
| 302 | received_payload.buffer.size); |
| 303 | ok(sock_ret == received_payload.buffer.size, |
| 304 | "Received payload bytes for message %u", i); |
| 305 | if (sock_ret != received_payload.buffer.size) { |
| 306 | ERR("Failed to receive payload bytes: ret = %zd, expected = %zu", |
| 307 | sock_ret, received_payload.buffer.size); |
| 308 | goto error; |
| 309 | } |
| 310 | |
| 311 | sock_ret = lttcomm_recv_payload_fds_unix_sock( |
| 312 | sockets[1], 1, &received_payload); |
| 313 | ok(sock_ret == (int) sizeof(int), "Received fd for message %u", |
| 314 | i); |
| 315 | if (sock_ret != (int) sizeof(int)) { |
| 316 | ERR("Failed to receive test payload file descriptors: ret = %zd, expected = %u", |
| 317 | sock_ret, (int) sizeof(int)); |
| 318 | goto error; |
| 319 | } |
| 320 | |
| 321 | { |
| 322 | const struct lttng_payload_view pv = |
| 323 | lttng_payload_view_from_payload( |
| 324 | &received_payload, 0, |
| 325 | -1); |
| 326 | const int fd_handle_count = |
| 327 | lttng_payload_view_get_fd_handle_count( |
| 328 | &pv); |
| 329 | |
| 330 | ok(fd_handle_count == 1, |
| 331 | "Payload contains 1 fd for message %u", |
| 332 | i); |
| 333 | } |
| 334 | |
| 335 | lttng_payload_clear(&received_payload); |
| 336 | } |
| 337 | |
| 338 | error: |
| 339 | for (i = 0; i < 2; i++) { |
| 340 | if (sockets[i] < 0) { |
| 341 | continue; |
| 342 | } |
| 343 | |
| 344 | if (close(sockets[i])) { |
| 345 | PERROR("Failed to close unix socket"); |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | lttng_payload_reset(&sent_payload); |
| 350 | lttng_payload_reset(&received_payload); |
| 351 | } |
| 352 | |
| 353 | /* |
| 354 | * Validate that a large message can be received in multiple chunks. |
| 355 | */ |
| 356 | static void test_receive_in_chunks( |
| 357 | unsigned int payload_size, unsigned int max_recv_size) |
| 358 | { |
| 359 | int sockets[2] = {-1, -1}; |
| 360 | int ret; |
| 361 | unsigned int i; |
| 362 | struct lttng_payload sent_payload; |
| 363 | struct lttng_payload received_payload; |
| 364 | struct fd_handle *handle; |
| 365 | int fd; |
| 366 | ssize_t sock_ret, received = 0; |
| 367 | |
| 368 | diag("Receive a message in multiple chunks"); |
| 369 | lttng_payload_init(&sent_payload); |
| 370 | lttng_payload_init(&received_payload); |
| 371 | |
| 372 | ret = lttcomm_create_anon_unix_socketpair(sockets); |
| 373 | ok(ret == 0, "Created anonymous unix socket pair"); |
| 374 | if (ret < 0) { |
| 375 | PERROR("Failed to create an anonymous pair of unix sockets"); |
| 376 | goto error; |
| 377 | } |
| 378 | |
| 379 | /* Add dummy content to payload. */ |
| 380 | ret = lttng_dynamic_buffer_set_size(&sent_payload.buffer, payload_size); |
| 381 | if (ret) { |
| 382 | PERROR("Failed to initialize test payload"); |
| 383 | goto error; |
| 384 | } |
| 385 | |
| 386 | fd = fcntl(STDOUT_FILENO, F_DUPFD, 0); |
| 387 | if (fd < 0) { |
| 388 | PERROR("Failed to create fd while creating test payload"); |
| 389 | goto error; |
| 390 | } |
| 391 | |
| 392 | handle = fd_handle_create(fd); |
| 393 | if (!handle) { |
| 394 | if (close(fd)) { |
| 395 | PERROR("Failed to close fd while preparing test payload"); |
| 396 | goto error; |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | ret = lttng_payload_push_fd_handle(&sent_payload, handle); |
| 401 | fd_handle_put(handle); |
| 402 | if (ret) { |
| 403 | PERROR("Failed to add fd handle to test payload"); |
| 404 | goto error; |
| 405 | } |
| 406 | |
| 407 | /* Send payload. */ |
| 408 | { |
| 409 | struct lttng_payload_view pv = lttng_payload_view_from_payload( |
| 410 | &sent_payload, 0, -1); |
| 411 | |
| 412 | /* Not expected to block considering the size of the payload. */ |
| 413 | sock_ret = lttcomm_send_unix_sock( |
| 414 | sockets[0], pv.buffer.data, pv.buffer.size); |
| 415 | ok(sock_ret == pv.buffer.size, "Sent complete test payload"); |
| 416 | if (sock_ret != pv.buffer.size) { |
| 417 | ERR("Failed to send test payload bytes: ret = %zd, expected = %zu", |
| 418 | sock_ret, pv.buffer.size); |
| 419 | goto error; |
| 420 | } |
| 421 | |
| 422 | sock_ret = lttcomm_send_payload_view_fds_unix_sock( |
| 423 | sockets[0], &pv); |
| 424 | ok(sock_ret == 1, "Sent test payload file descriptors"); |
| 425 | if (sock_ret != 1) { |
| 426 | if (sock_ret < 0) { |
| 427 | PERROR("Failed to send test payload file descriptors: ret = %zd, expected = %d", |
| 428 | sock_ret, 1); |
| 429 | } else { |
| 430 | diag("Failed to send test payload file descriptors: ret = %zd, expected = %d", |
| 431 | sock_ret, 1); |
| 432 | } |
| 433 | |
| 434 | goto error; |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | /* Receive payload */ |
| 439 | ret = lttng_dynamic_buffer_set_size( |
| 440 | &received_payload.buffer, sent_payload.buffer.size); |
| 441 | if (ret) { |
| 442 | PERROR("Failed to pre-allocate reception buffer"); |
| 443 | goto error; |
| 444 | } |
| 445 | |
| 446 | do { |
| 447 | const ssize_t to_receive_this_pass = |
| 448 | std::min<ssize_t>(max_recv_size, |
| 449 | sent_payload.buffer.size - received); |
| 450 | |
| 451 | sock_ret = lttcomm_recv_unix_sock(sockets[1], |
| 452 | received_payload.buffer.data + received, |
| 453 | to_receive_this_pass); |
| 454 | if (sock_ret != to_receive_this_pass) { |
| 455 | ERR("Failed to receive payload bytes: ret = %zd, expected = %zu", |
| 456 | sock_ret, to_receive_this_pass); |
| 457 | break; |
| 458 | } |
| 459 | |
| 460 | received += sock_ret; |
| 461 | } while (received < sent_payload.buffer.size); |
| 462 | |
| 463 | ok(received == sent_payload.buffer.size, |
| 464 | "Received complete payload in chunks of %u bytes", |
| 465 | max_recv_size); |
| 466 | if (received != sent_payload.buffer.size) { |
| 467 | goto error; |
| 468 | } |
| 469 | |
| 470 | sock_ret = lttcomm_recv_payload_fds_unix_sock( |
| 471 | sockets[1], 1, &received_payload); |
| 472 | ok(sock_ret == (int) sizeof(int), |
| 473 | "Received file descriptor after receiving payload in chunks"); |
| 474 | if (sock_ret != (int) sizeof(int)) { |
| 475 | ERR("Failed to receive test payload file descriptors: ret = %zd, expected = %d", |
| 476 | sock_ret, (int) sizeof(int)); |
| 477 | goto error; |
| 478 | } |
| 479 | |
| 480 | { |
| 481 | const struct lttng_payload_view pv = |
| 482 | lttng_payload_view_from_payload( |
| 483 | &received_payload, 0, -1); |
| 484 | const int fd_handle_count = |
| 485 | lttng_payload_view_get_fd_handle_count(&pv); |
| 486 | |
| 487 | ok(fd_handle_count == 1, |
| 488 | "Payload contains 1 fd after receiving payload in chunks"); |
| 489 | } |
| 490 | |
| 491 | error: |
| 492 | for (i = 0; i < 2; i++) { |
| 493 | if (sockets[i] < 0) { |
| 494 | continue; |
| 495 | } |
| 496 | |
| 497 | if (close(sockets[i])) { |
| 498 | PERROR("Failed to close unix socket"); |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | lttng_payload_reset(&sent_payload); |
| 503 | lttng_payload_reset(&received_payload); |
| 504 | } |
| 505 | |
| 506 | static |
| 507 | void test_creds_passing(void) |
| 508 | { |
| 509 | pid_t fork_ret = -1; |
| 510 | int ret, parent_socket = -1, child_connection_socket = -1; |
| 511 | ssize_t sock_ret; |
| 512 | char socket_dir_path[] = "/tmp/test.unix.socket.creds.passing.XXXXXX"; |
| 513 | char socket_path[PATH_MAX] = {}; |
| 514 | struct expected_creds { |
| 515 | uid_t euid; |
| 516 | gid_t egid; |
| 517 | pid_t pid; |
| 518 | } expected_creds; |
| 519 | |
| 520 | diag("Receive peer's effective uid, effective gid, and pid from a unix socket"); |
| 521 | |
| 522 | if (!mkdtemp(socket_dir_path)) { |
| 523 | PERROR("Failed to generate temporary socket location"); |
| 524 | goto error; |
| 525 | } |
| 526 | |
| 527 | strncat(socket_path, socket_dir_path, |
| 528 | sizeof(socket_path) - strlen(socket_path) - 1); |
| 529 | strncat(socket_path, "/test_unix_socket", |
| 530 | sizeof(socket_path) - strlen(socket_path) - 1); |
| 531 | |
| 532 | parent_socket = lttcomm_create_unix_sock(socket_path); |
| 533 | ok(parent_socket >= 0, "Created unix socket at path `%s`", socket_path); |
| 534 | if (parent_socket < 0) { |
| 535 | PERROR("Failed to create unix socket at path `%s`", socket_path); |
| 536 | goto error; |
| 537 | } |
| 538 | |
| 539 | ret = lttcomm_listen_unix_sock(parent_socket); |
| 540 | if (ret < 0) { |
| 541 | PERROR("Failed to mark parent socket as a passive socket"); |
| 542 | goto error; |
| 543 | } |
| 544 | |
| 545 | ret = lttcomm_setsockopt_creds_unix_sock(parent_socket); |
| 546 | if (ret) { |
| 547 | PERROR("Failed to set SO_PASSCRED on parent socket"); |
| 548 | goto error; |
| 549 | } |
| 550 | |
| 551 | fork_ret = fork(); |
| 552 | if (fork_ret < 0) { |
| 553 | PERROR("Failed to fork"); |
| 554 | goto error; |
| 555 | } |
| 556 | |
| 557 | if (fork_ret == 0) { |
| 558 | /* Child. */ |
| 559 | int child_socket; |
| 560 | |
| 561 | expected_creds = (struct expected_creds){ |
| 562 | .euid = geteuid(), |
| 563 | .egid = getegid(), |
| 564 | .pid = getpid(), |
| 565 | }; |
| 566 | |
| 567 | child_socket = lttcomm_connect_unix_sock(socket_path); |
| 568 | if (child_socket < 0) { |
| 569 | PERROR("Failed to connect to parent socket"); |
| 570 | goto error; |
| 571 | } |
| 572 | |
| 573 | ret = lttcomm_setsockopt_creds_unix_sock(child_socket); |
| 574 | if (ret) { |
| 575 | PERROR("Failed to set SO_PASSCRED on child socket"); |
| 576 | } |
| 577 | |
| 578 | sock_ret = lttcomm_send_creds_unix_sock(child_socket, &expected_creds, |
| 579 | sizeof(expected_creds)); |
| 580 | if (sock_ret < 0) { |
| 581 | PERROR("Failed to send expected credentials"); |
| 582 | } |
| 583 | |
| 584 | ret = close(child_socket); |
| 585 | if (ret) { |
| 586 | PERROR("Failed to close child socket"); |
| 587 | } |
| 588 | } else { |
| 589 | /* Parent. */ |
| 590 | int child_status; |
| 591 | pid_t wait_pid_ret; |
| 592 | lttng_sock_cred received_creds = {}; |
| 593 | |
| 594 | child_connection_socket = |
| 595 | lttcomm_accept_unix_sock(parent_socket); |
| 596 | if (child_connection_socket < 0) { |
| 597 | PERROR(); |
| 598 | goto error; |
| 599 | } |
| 600 | |
| 601 | ret = lttcomm_setsockopt_creds_unix_sock( |
| 602 | child_connection_socket); |
| 603 | if (ret) { |
| 604 | PERROR("Failed to set SO_PASSCRED on child connection socket"); |
| 605 | goto error; |
| 606 | } |
| 607 | |
| 608 | sock_ret = lttcomm_recv_creds_unix_sock(child_connection_socket, |
| 609 | &expected_creds, sizeof(expected_creds), |
| 610 | &received_creds); |
| 611 | if (sock_ret < 0) { |
| 612 | PERROR("Failed to receive credentials"); |
| 613 | goto error; |
| 614 | } |
| 615 | |
| 616 | wait_pid_ret = waitpid(fork_ret, &child_status, 0); |
| 617 | if (wait_pid_ret == -1) { |
| 618 | PERROR("Failed to wait for termination of child process"); |
| 619 | goto error; |
| 620 | } |
| 621 | if (!WIFEXITED(child_status) || WEXITSTATUS(child_status)) { |
| 622 | diag("Child process reported an error, test failed"); |
| 623 | goto error; |
| 624 | } |
| 625 | |
| 626 | ok(expected_creds.euid == received_creds.uid, |
| 627 | "Received the expected effective uid (%d == %d)", |
| 628 | expected_creds.euid, received_creds.uid); |
| 629 | ok(expected_creds.egid == received_creds.gid, |
| 630 | "Received the expected effective gid (%d == %d)", |
| 631 | expected_creds.egid, received_creds.gid); |
| 632 | ok(expected_creds.pid == received_creds.pid, |
| 633 | "Received the expected pid (%d == %d)", |
| 634 | expected_creds.pid, received_creds.pid); |
| 635 | } |
| 636 | |
| 637 | error: |
| 638 | if (parent_socket >= 0) { |
| 639 | ret = close(parent_socket); |
| 640 | if (ret) { |
| 641 | PERROR("Failed to close parent socket"); |
| 642 | } |
| 643 | } |
| 644 | |
| 645 | if (fork_ret == 0) { |
| 646 | /* Prevent libtap from printing a result for the child. */ |
| 647 | fclose(stdout); |
| 648 | fclose(stderr); |
| 649 | |
| 650 | /* Child exits at the end of this test. */ |
| 651 | exit(0); |
| 652 | } else if (parent_socket >= 0) { |
| 653 | if (child_connection_socket >= 0) { |
| 654 | ret = close(child_connection_socket); |
| 655 | if (ret) { |
| 656 | PERROR("Failed to close child connection socket"); |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | ret = unlink(socket_path); |
| 661 | if (ret) { |
| 662 | PERROR("Failed to unlink socket at path `%s`", |
| 663 | socket_path); |
| 664 | } |
| 665 | |
| 666 | ret = rmdir(socket_dir_path); |
| 667 | if (ret) { |
| 668 | PERROR("Failed to remove test directory at `%s`", |
| 669 | socket_dir_path); |
| 670 | } |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | int main(void) |
| 675 | { |
| 676 | plan_tests(TEST_COUNT); |
| 677 | |
| 678 | test_high_fd_count(HIGH_FD_COUNT); |
| 679 | test_one_fd_per_message(MESSAGE_COUNT); |
| 680 | test_receive_in_chunks(LARGE_PAYLOAD_SIZE, LARGE_PAYLOAD_RECV_SIZE); |
| 681 | test_creds_passing(); |
| 682 | |
| 683 | return exit_status(); |
| 684 | } |