| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #include "ebpf.h" |
| 4 | #include "ebpf_functions.h" |
| 5 | #include "libbpf_api/ebpf_library.h" |
| 6 | |
| 7 | /***************************************************************** |
| 8 | * EBPF FUNCTION COMMON |
| 9 | *****************************************************************/ |
| 10 | |
| 11 | typedef struct ebpf_function_thread_start { |
| 12 | ebpf_module_t *em; |
| 13 | void (*start_routine)(void *); |
| 14 | bool ready; |
| 15 | bool run; |
| 16 | } ebpf_function_thread_start_t; |
| 17 | |
| 18 | static void ebpf_function_thread_start(void *ptr) |
| 19 | { |
| 20 | ebpf_function_thread_start_t *ctx = ptr; |
| 21 | |
| 22 | // Keep the new thread parked until its owner publishes the module state. |
| 23 | while (!__atomic_load_n(&ctx->ready, __ATOMIC_ACQUIRE)) |
| 24 | tinysleep(); |
| 25 | |
| 26 | bool run = __atomic_load_n(&ctx->run, __ATOMIC_ACQUIRE); |
| 27 | ebpf_module_t *em = ctx->em; |
| 28 | void (*start_routine)(void *) = ctx->start_routine; |
| 29 | freez(ctx); |
| 30 | |
| 31 | if (run) |
| 32 | start_routine(em); |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * Function Start thread |
| 37 | * |
| 38 | * Start a specific thread after user request. |
| 39 | * |
| 40 | * @param em The structure with thread information |
| 41 | * @param period |
| 42 | * @return |
| 43 | */ |
| 44 | static int ebpf_function_start_thread(ebpf_module_t *em, int period) |
| 45 | { |
| 46 | struct netdata_static_thread *st = em->thread; |
| 47 | // another request for thread that already ran, cleanup and restart |
| 48 | if (period <= 0) |
| 49 | period = EBPF_DEFAULT_LIFETIME; |
| 50 | |
| 51 | #ifdef NETDATA_INTERNAL_CHECKS |
| 52 | netdata_log_info("Starting thread %s with lifetime = %d", em->info.thread_name, period); |
| 53 | #endif |
| 54 | |
| 55 | ebpf_function_thread_start_t *ctx = callocz(1, sizeof(*ctx)); |
| 56 | ctx->em = em; |
| 57 | ctx->start_routine = st->start_routine; |
| 58 | |
| 59 | ND_THREAD *thread = nd_thread_create(st->name, NETDATA_THREAD_OPTION_DEFAULT, ebpf_function_thread_start, ctx); |
| 60 | if (!thread) { |
| 61 | freez(ctx); |
| 62 | return 1; |
| 63 | } |
| 64 | |
| 65 | bool run = true; |
| 66 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 67 | if (ebpf_plugin_stop()) |
| 68 | run = false; |
| 69 | else { |
| 70 | st->thread = thread; |
| 71 | ebpf_module_enabled_set(em, NETDATA_THREAD_EBPF_FUNCTION_RUNNING); |
| 72 | em->lifetime = period; |
| 73 | } |
| 74 | __atomic_store_n(&ctx->run, run, __ATOMIC_RELEASE); |
| 75 | __atomic_store_n(&ctx->ready, true, __ATOMIC_RELEASE); |
| 76 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 77 | |
| 78 | if (!run) { |
| 79 | nd_thread_signal_cancel(thread); |
| 80 | nd_thread_join(thread); |
| 81 | return 1; |
| 82 | } |
| 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | /***************************************************************** |
| 88 | * EBPF ERROR FUNCTIONS |
| 89 | *****************************************************************/ |
| 90 | |
| 91 | /** |
| 92 | * Function error |
| 93 | * |
| 94 | * Show error when a wrong function is given |
| 95 | * |
| 96 | * @param transaction the transaction id that Netdata sent for this function execution |
| 97 | * @param code the error code to show with the message. |
| 98 | * @param msg the error message |
| 99 | */ |
| 100 | static inline void ebpf_function_error(const char *transaction, int code, const char *msg) |
| 101 | { |
| 102 | pluginsd_function_json_error_to_stdout(transaction, code, msg); |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Thread Help |
| 107 | * |
| 108 | * Shows help with all options accepted by thread function. |
| 109 | * |
| 110 | * @param transaction the transaction id that Netdata sent for this function execution |
| 111 | */ |
| 112 | static inline void ebpf_function_help(const char *transaction, const char *message) |
| 113 | { |
| 114 | pluginsd_function_result_begin_to_stdout(transaction, HTTP_RESP_OK, "text/plain", now_realtime_sec() + 3600); |
| 115 | fprintf(stdout, "%s", message); |
| 116 | pluginsd_function_result_end_to_stdout(); |
| 117 | fflush(stdout); |
| 118 | } |
| 119 | |
| 120 | /***************************************************************** |
| 121 | * EBPF SOCKET FUNCTION |
| 122 | *****************************************************************/ |
| 123 | |
| 124 | /** |
| 125 | * Fill Fake socket |
| 126 | * |
| 127 | * Fill socket with an invalid request. |
| 128 | * |
| 129 | * @param fake_values is the structure where we are storing the value. |
| 130 | */ |
| 131 | static inline void ebpf_socket_fill_fake_socket(netdata_socket_plus_t *fake_values) |
| 132 | { |
| 133 | snprintfz(fake_values->socket_string.src_ip, INET6_ADDRSTRLEN, "%s", "127.0.0.1"); |
| 134 | snprintfz(fake_values->socket_string.dst_ip, INET6_ADDRSTRLEN, "%s", "127.0.0.1"); |
| 135 | fake_values->pid = getpid(); |
| 136 | //fake_values->socket_string.src_port = 0; |
| 137 | fake_values->socket_string.dst_port[0] = 0; |
| 138 | snprintfz(fake_values->socket_string.dst_ip, NI_MAXSERV, "%s", "none"); |
| 139 | fake_values->data.family = AF_INET; |
| 140 | fake_values->data.protocol = AF_UNSPEC; |
| 141 | } |
| 142 | |
| 143 | static NETDATA_DOUBLE bytes_to_mb(uint64_t bytes) |
| 144 | { |
| 145 | return (NETDATA_DOUBLE)bytes / (1024 * 1024); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Fill function buffer |
| 150 | * |
| 151 | * Fill buffer with data to be shown on cloud. |
| 152 | * |
| 153 | * @param wb buffer where we store data. |
| 154 | * @param values data read from hash table |
| 155 | * @param name the process name |
| 156 | */ |
| 157 | static void ebpf_fill_function_buffer(BUFFER *wb, netdata_socket_plus_t *values, char *name) |
| 158 | { |
| 159 | buffer_json_add_array_item_array(wb); |
| 160 | |
| 161 | // IMPORTANT! |
| 162 | // THE ORDER SHOULD BE THE SAME WITH THE FIELDS! |
| 163 | |
| 164 | // PID |
| 165 | buffer_json_add_array_item_uint64(wb, (uint64_t)values->pid); |
| 166 | |
| 167 | // NAME |
| 168 | if (!values->data.name[0]) |
| 169 | buffer_json_add_array_item_string(wb, (name) ? name : "unknown"); |
| 170 | else |
| 171 | buffer_json_add_array_item_string(wb, values->data.name); |
| 172 | |
| 173 | // Origin |
| 174 | buffer_json_add_array_item_string(wb, (values->data.external_origin) ? "in" : "out"); |
| 175 | |
| 176 | // Source IP |
| 177 | buffer_json_add_array_item_string(wb, values->socket_string.src_ip); |
| 178 | |
| 179 | // SRC Port |
| 180 | //buffer_json_add_array_item_uint64(wb, (uint64_t) values->socket_string.src_port); |
| 181 | |
| 182 | // Destination IP |
| 183 | buffer_json_add_array_item_string(wb, values->socket_string.dst_ip); |
| 184 | |
| 185 | // DST Port |
| 186 | buffer_json_add_array_item_string(wb, values->socket_string.dst_port); |
| 187 | |
| 188 | uint64_t connections; |
| 189 | if (values->data.protocol == IPPROTO_TCP) { |
| 190 | buffer_json_add_array_item_string(wb, "TCP"); |
| 191 | buffer_json_add_array_item_double(wb, bytes_to_mb(values->data.tcp.tcp_bytes_received)); |
| 192 | buffer_json_add_array_item_double(wb, bytes_to_mb(values->data.tcp.tcp_bytes_sent)); |
| 193 | connections = values->data.tcp.ipv4_connect + values->data.tcp.ipv6_connect; |
| 194 | } else if (values->data.protocol == IPPROTO_UDP) { |
| 195 | buffer_json_add_array_item_string(wb, "UDP"); |
| 196 | buffer_json_add_array_item_double(wb, bytes_to_mb(values->data.udp.udp_bytes_received)); |
| 197 | buffer_json_add_array_item_double(wb, bytes_to_mb(values->data.udp.udp_bytes_sent)); |
| 198 | connections = values->data.udp.call_udp_sent + values->data.udp.call_udp_received; |
| 199 | } else { |
| 200 | buffer_json_add_array_item_string(wb, "UNSPEC"); |
| 201 | buffer_json_add_array_item_double(wb, 0); |
| 202 | buffer_json_add_array_item_double(wb, 0); |
| 203 | connections = 1; |
| 204 | } |
| 205 | |
| 206 | // Connections |
| 207 | if (values->flags & NETDATA_SOCKET_FLAGS_ALREADY_OPEN) { |
| 208 | connections++; |
| 209 | } else if (!connections) { |
| 210 | // If no connections, this means that we lost when connection was opened |
| 211 | values->flags |= NETDATA_SOCKET_FLAGS_ALREADY_OPEN; |
| 212 | connections++; |
| 213 | } |
| 214 | buffer_json_add_array_item_uint64(wb, connections); |
| 215 | |
| 216 | buffer_json_array_close(wb); |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * Clean Judy array unsafe |
| 221 | * |
| 222 | * Clean all Judy Array allocated to show table when a function is called. |
| 223 | * Before to call this function it is necessary to lock `ebpf_judy_pid.index.rw_spinlock`. |
| 224 | **/ |
| 225 | static void ebpf_socket_clean_judy_array_unsafe() |
| 226 | { |
| 227 | if (!ebpf_judy_pid.index.JudyLArray) |
| 228 | return; |
| 229 | |
| 230 | Pvoid_t *pid_value, *socket_value; |
| 231 | Word_t local_pid = 0, local_socket = 0; |
| 232 | bool first_pid = true, first_socket = true; |
| 233 | while ((pid_value = JudyLFirstThenNext(ebpf_judy_pid.index.JudyLArray, &local_pid, &first_pid))) { |
| 234 | netdata_ebpf_judy_pid_stats_t *pid_ptr = (netdata_ebpf_judy_pid_stats_t *)*pid_value; |
| 235 | rw_spinlock_write_lock(&pid_ptr->socket_stats.rw_spinlock); |
| 236 | if (pid_ptr->socket_stats.JudyLArray) { |
| 237 | while ( |
| 238 | (socket_value = JudyLFirstThenNext(pid_ptr->socket_stats.JudyLArray, &local_socket, &first_socket))) { |
| 239 | netdata_socket_plus_t *socket_clean = *socket_value; |
| 240 | aral_freez(aral_socket_table, socket_clean); |
| 241 | } |
| 242 | JudyLFreeArray(&pid_ptr->socket_stats.JudyLArray, PJE0); |
| 243 | pid_ptr->socket_stats.JudyLArray = NULL; |
| 244 | } |
| 245 | rw_spinlock_write_unlock(&pid_ptr->socket_stats.rw_spinlock); |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Fill function buffer unsafe |
| 251 | * |
| 252 | * Fill the function buffer with socket information. Before to call this function it is necessary to lock |
| 253 | * ebpf_judy_pid.index.rw_spinlock |
| 254 | * |
| 255 | * @param buf buffer used to store data to be shown by function. |
| 256 | * |
| 257 | * @return it returns 0 on success and -1 otherwise. |
| 258 | */ |
| 259 | static void ebpf_socket_fill_function_buffer_unsafe(BUFFER *buf) |
| 260 | { |
| 261 | int counter = 0; |
| 262 | |
| 263 | Pvoid_t *pid_value, *socket_value; |
| 264 | Word_t local_pid = 0; |
| 265 | bool first_pid = true; |
| 266 | while ((pid_value = JudyLFirstThenNext(ebpf_judy_pid.index.JudyLArray, &local_pid, &first_pid))) { |
| 267 | netdata_ebpf_judy_pid_stats_t *pid_ptr = (netdata_ebpf_judy_pid_stats_t *)*pid_value; |
| 268 | bool first_socket = true; |
| 269 | Word_t local_timestamp = 0; |
| 270 | rw_spinlock_read_lock(&pid_ptr->socket_stats.rw_spinlock); |
| 271 | if (pid_ptr->socket_stats.JudyLArray) { |
| 272 | while (( |
| 273 | socket_value = JudyLFirstThenNext(pid_ptr->socket_stats.JudyLArray, &local_timestamp, &first_socket))) { |
| 274 | netdata_socket_plus_t *values = (netdata_socket_plus_t *)*socket_value; |
| 275 | ebpf_fill_function_buffer(buf, values, pid_ptr->cmdline); |
| 276 | } |
| 277 | counter++; |
| 278 | } |
| 279 | rw_spinlock_read_unlock(&pid_ptr->socket_stats.rw_spinlock); |
| 280 | } |
| 281 | |
| 282 | if (!counter) { |
| 283 | netdata_socket_plus_t fake_values = {}; |
| 284 | ebpf_socket_fill_fake_socket(&fake_values); |
| 285 | ebpf_fill_function_buffer(buf, &fake_values, NULL); |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * Socket read hash |
| 291 | * |
| 292 | * This is the thread callback. |
| 293 | * This thread is necessary, because we cannot freeze the whole plugin to read the data on very busy socket. |
| 294 | * |
| 295 | * @param buf the buffer to store data; |
| 296 | * @param em the module main structure. |
| 297 | * |
| 298 | * @return It always returns NULL. |
| 299 | */ |
| 300 | void ebpf_socket_read_open_connections(BUFFER *buf, struct ebpf_module *em) |
| 301 | { |
| 302 | // thread was not initialized or Array was reset |
| 303 | rw_spinlock_read_lock(&ebpf_judy_pid.index.rw_spinlock); |
| 304 | if (!em->maps || (em->maps[NETDATA_SOCKET_OPEN_SOCKET].map_fd == ND_EBPF_MAP_FD_NOT_INITIALIZED) || |
| 305 | !ebpf_judy_pid.index.JudyLArray) { |
| 306 | netdata_socket_plus_t fake_values = {}; |
| 307 | |
| 308 | ebpf_socket_fill_fake_socket(&fake_values); |
| 309 | |
| 310 | ebpf_fill_function_buffer(buf, &fake_values, NULL); |
| 311 | rw_spinlock_read_unlock(&ebpf_judy_pid.index.rw_spinlock); |
| 312 | return; |
| 313 | } |
| 314 | |
| 315 | rw_spinlock_read_lock(&network_viewer_opt.rw_spinlock); |
| 316 | ebpf_socket_fill_function_buffer_unsafe(buf); |
| 317 | rw_spinlock_read_unlock(&network_viewer_opt.rw_spinlock); |
| 318 | rw_spinlock_read_unlock(&ebpf_judy_pid.index.rw_spinlock); |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * Function: Socket |
| 323 | * |
| 324 | * Show information for sockets stored in hash tables. |
| 325 | * |
| 326 | * @param transaction the transaction id that Netdata sent for this function execution |
| 327 | * @param function function name and arguments given to thread. |
| 328 | * @param timeout The function timeout |
| 329 | * @param cancelled Variable used to store function status. |
| 330 | */ |
| 331 | static void ebpf_function_socket_manipulation( |
| 332 | const char *transaction, |
| 333 | char *function __maybe_unused, |
| 334 | usec_t *stop_monotonic_ut __maybe_unused, |
| 335 | bool *cancelled __maybe_unused, |
| 336 | BUFFER *payload __maybe_unused, |
| 337 | HTTP_ACCESS access __maybe_unused, |
| 338 | const char *source __maybe_unused, |
| 339 | void *data __maybe_unused) |
| 340 | { |
| 341 | ebpf_module_t *em = &ebpf_modules[EBPF_MODULE_SOCKET_IDX]; |
| 342 | |
| 343 | char *words[PLUGINSD_MAX_WORDS] = {NULL}; |
| 344 | size_t num_words = quoted_strings_splitter_whitespace(function, words, PLUGINSD_MAX_WORDS); |
| 345 | const char *name; |
| 346 | int period = -1; |
| 347 | rw_spinlock_write_lock(&ebpf_judy_pid.index.rw_spinlock); |
| 348 | network_viewer_opt.enabled = CONFIG_BOOLEAN_YES; |
| 349 | uint32_t previous; |
| 350 | bool info = false; |
| 351 | time_t now_s = now_realtime_sec(); |
| 352 | |
| 353 | static const char *socket_help = { |
| 354 | "ebpf.plugin / socket\n" |
| 355 | "\n" |
| 356 | "Function `socket` display information for all open sockets during ebpf.plugin runtime.\n" |
| 357 | "During thread runtime the plugin is always collecting data, but when an option is modified, the plugin\n" |
| 358 | "resets completely the previous table and can show a clean data for the first request before to bring the\n" |
| 359 | "modified request.\n" |
| 360 | "\n" |
| 361 | "The following filters are supported:\n" |
| 362 | "\n" |
| 363 | " family:FAMILY\n" |
| 364 | " Shows information for the FAMILY specified. Option accepts IPV4, IPV6 and all, that is the default.\n" |
| 365 | "\n" |
| 366 | " period:PERIOD\n" |
| 367 | " Enable socket to run a specific PERIOD in seconds. When PERIOD is not\n" |
| 368 | " specified plugin will use the default 300 seconds\n" |
| 369 | "\n" |
| 370 | " resolve:BOOL\n" |
| 371 | " Resolve service name, default value is YES.\n" |
| 372 | "\n" |
| 373 | " range:CIDR\n" |
| 374 | " Show sockets that have only a specific destination. Default all addresses.\n" |
| 375 | "\n" |
| 376 | " port:range\n" |
| 377 | " Show sockets that have only a specific destination.\n" |
| 378 | "\n" |
| 379 | " reset\n" |
| 380 | " Send a reset to collector. When a collector receives this command, it uses everything defined in configuration file.\n" |
| 381 | "\n" |
| 382 | " interfaces\n" |
| 383 | " When the collector receives this command, it read all available interfaces on host.\n" |
| 384 | "\n" |
| 385 | "Filters can be combined. Each filter can be given only one time. Default all ports\n"}; |
| 386 | |
| 387 | for (int i = 1; i < PLUGINSD_MAX_WORDS; i++) { |
| 388 | const char *keyword = get_word(words, num_words, i); |
| 389 | if (!keyword) |
| 390 | break; |
| 391 | |
| 392 | if (strncmp(keyword, EBPF_FUNCTION_SOCKET_FAMILY, sizeof(EBPF_FUNCTION_SOCKET_FAMILY) - 1) == 0) { |
| 393 | name = &keyword[sizeof(EBPF_FUNCTION_SOCKET_FAMILY) - 1]; |
| 394 | previous = network_viewer_opt.family; |
| 395 | uint32_t family = AF_UNSPEC; |
| 396 | if (!strcmp(name, "IPV4")) |
| 397 | family = AF_INET; |
| 398 | else if (!strcmp(name, "IPV6")) |
| 399 | family = AF_INET6; |
| 400 | |
| 401 | if (family != previous) { |
| 402 | rw_spinlock_write_lock(&network_viewer_opt.rw_spinlock); |
| 403 | network_viewer_opt.family = family; |
| 404 | rw_spinlock_write_unlock(&network_viewer_opt.rw_spinlock); |
| 405 | ebpf_socket_clean_judy_array_unsafe(); |
| 406 | } |
| 407 | } else if (strncmp(keyword, EBPF_FUNCTION_SOCKET_PERIOD, sizeof(EBPF_FUNCTION_SOCKET_PERIOD) - 1) == 0) { |
| 408 | name = &keyword[sizeof(EBPF_FUNCTION_SOCKET_PERIOD) - 1]; |
| 409 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 410 | period = str2i(name); |
| 411 | if (period > 0) { |
| 412 | em->lifetime = period; |
| 413 | } else |
| 414 | em->lifetime = EBPF_NON_FUNCTION_LIFE_TIME; |
| 415 | |
| 416 | #ifdef NETDATA_DEV_MODE |
| 417 | collector_info("Lifetime modified for %u", em->lifetime); |
| 418 | #endif |
| 419 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 420 | } else if (strncmp(keyword, EBPF_FUNCTION_SOCKET_RESOLVE, sizeof(EBPF_FUNCTION_SOCKET_RESOLVE) - 1) == 0) { |
| 421 | previous = network_viewer_opt.service_resolution_enabled; |
| 422 | uint32_t resolution; |
| 423 | name = &keyword[sizeof(EBPF_FUNCTION_SOCKET_RESOLVE) - 1]; |
| 424 | resolution = (!strcasecmp(name, "YES")) ? CONFIG_BOOLEAN_YES : CONFIG_BOOLEAN_NO; |
| 425 | |
| 426 | if (previous != resolution) { |
| 427 | rw_spinlock_write_lock(&network_viewer_opt.rw_spinlock); |
| 428 | network_viewer_opt.service_resolution_enabled = resolution; |
| 429 | rw_spinlock_write_unlock(&network_viewer_opt.rw_spinlock); |
| 430 | |
| 431 | ebpf_socket_clean_judy_array_unsafe(); |
| 432 | } |
| 433 | } else if (strncmp(keyword, EBPF_FUNCTION_SOCKET_RANGE, sizeof(EBPF_FUNCTION_SOCKET_RANGE) - 1) == 0) { |
| 434 | name = &keyword[sizeof(EBPF_FUNCTION_SOCKET_RANGE) - 1]; |
| 435 | rw_spinlock_write_lock(&network_viewer_opt.rw_spinlock); |
| 436 | ebpf_clean_ip_structure(&network_viewer_opt.included_ips); |
| 437 | ebpf_clean_ip_structure(&network_viewer_opt.excluded_ips); |
| 438 | ebpf_parse_ips_unsafe((char *)name); |
| 439 | rw_spinlock_write_unlock(&network_viewer_opt.rw_spinlock); |
| 440 | |
| 441 | ebpf_socket_clean_judy_array_unsafe(); |
| 442 | } else if (strncmp(keyword, EBPF_FUNCTION_SOCKET_PORT, sizeof(EBPF_FUNCTION_SOCKET_PORT) - 1) == 0) { |
| 443 | name = &keyword[sizeof(EBPF_FUNCTION_SOCKET_PORT) - 1]; |
| 444 | rw_spinlock_write_lock(&network_viewer_opt.rw_spinlock); |
| 445 | ebpf_clean_port_structure(&network_viewer_opt.included_port); |
| 446 | ebpf_clean_port_structure(&network_viewer_opt.excluded_port); |
| 447 | ebpf_parse_ports((char *)name); |
| 448 | rw_spinlock_write_unlock(&network_viewer_opt.rw_spinlock); |
| 449 | |
| 450 | ebpf_socket_clean_judy_array_unsafe(); |
| 451 | } else if (strncmp(keyword, EBPF_FUNCTION_SOCKET_RESET, sizeof(EBPF_FUNCTION_SOCKET_RESET) - 1) == 0) { |
| 452 | rw_spinlock_write_lock(&network_viewer_opt.rw_spinlock); |
| 453 | ebpf_clean_port_structure(&network_viewer_opt.included_port); |
| 454 | ebpf_clean_port_structure(&network_viewer_opt.excluded_port); |
| 455 | |
| 456 | ebpf_clean_ip_structure(&network_viewer_opt.included_ips); |
| 457 | ebpf_clean_ip_structure(&network_viewer_opt.excluded_ips); |
| 458 | ebpf_clean_ip_structure(&network_viewer_opt.ipv4_local_ip); |
| 459 | ebpf_clean_ip_structure(&network_viewer_opt.ipv6_local_ip); |
| 460 | |
| 461 | parse_network_viewer_section(&socket_config); |
| 462 | ebpf_read_local_addresses_unsafe(); |
| 463 | network_viewer_opt.enabled = CONFIG_BOOLEAN_YES; |
| 464 | rw_spinlock_write_unlock(&network_viewer_opt.rw_spinlock); |
| 465 | } else if (strncmp(keyword, EBPF_FUNCTION_SOCKET_INTERFACES, sizeof(EBPF_FUNCTION_SOCKET_INTERFACES) - 1) == 0) { |
| 466 | rw_spinlock_write_lock(&network_viewer_opt.rw_spinlock); |
| 467 | ebpf_read_local_addresses_unsafe(); |
| 468 | rw_spinlock_write_unlock(&network_viewer_opt.rw_spinlock); |
| 469 | } else if (strncmp(keyword, "help", 4) == 0) { |
| 470 | ebpf_function_help(transaction, socket_help); |
| 471 | rw_spinlock_write_unlock(&ebpf_judy_pid.index.rw_spinlock); |
| 472 | return; |
| 473 | } else if (strncmp(keyword, "info", 4) == 0) |
| 474 | info = true; |
| 475 | } |
| 476 | rw_spinlock_write_unlock(&ebpf_judy_pid.index.rw_spinlock); |
| 477 | |
| 478 | if (ebpf_module_enabled_get(em) > NETDATA_THREAD_EBPF_FUNCTION_RUNNING) { |
| 479 | // Cleanup when we already had a thread running |
| 480 | rw_spinlock_write_lock(&ebpf_judy_pid.index.rw_spinlock); |
| 481 | ebpf_socket_clean_judy_array_unsafe(); |
| 482 | rw_spinlock_write_unlock(&ebpf_judy_pid.index.rw_spinlock); |
| 483 | |
| 484 | collect_pids |= 1 << EBPF_MODULE_SOCKET_IDX; |
| 485 | if (ebpf_function_start_thread(em, period)) { |
| 486 | ebpf_function_error(transaction, HTTP_RESP_INTERNAL_SERVER_ERROR, "Cannot start thread."); |
| 487 | return; |
| 488 | } |
| 489 | } else { |
| 490 | netdata_mutex_lock(&ebpf_exit_cleanup); |
| 491 | if (period < 0) |
| 492 | em->lifetime = (ebpf_module_enabled_get(em) != NETDATA_THREAD_EBPF_FUNCTION_RUNNING) ? |
| 493 | EBPF_NON_FUNCTION_LIFE_TIME : |
| 494 | EBPF_DEFAULT_LIFETIME; |
| 495 | netdata_mutex_unlock(&ebpf_exit_cleanup); |
| 496 | } |
| 497 | |
| 498 | BUFFER *wb = buffer_create(4096, NULL); |
| 499 | buffer_json_initialize(wb, "\"", "\"", 0, true, BUFFER_JSON_OPTIONS_NEWLINE_ON_ARRAY_ITEMS); |
| 500 | buffer_json_member_add_uint64(wb, "status", HTTP_RESP_OK); |
| 501 | buffer_json_member_add_string(wb, "type", "table"); |
| 502 | buffer_json_member_add_time_t(wb, "update_every", em->update_every); |
| 503 | buffer_json_member_add_boolean(wb, "has_history", false); |
| 504 | buffer_json_member_add_string(wb, "help", EBPF_PLUGIN_SOCKET_FUNCTION_DESCRIPTION); |
| 505 | |
| 506 | if (info) |
| 507 | goto close_and_send; |
| 508 | |
| 509 | // Collect data |
| 510 | buffer_json_member_add_array(wb, "data"); |
| 511 | ebpf_socket_read_open_connections(wb, em); |
| 512 | buffer_json_array_close(wb); // data |
| 513 | |
| 514 | buffer_json_member_add_object(wb, "columns"); |
| 515 | { |
| 516 | int fields_id = 0; |
| 517 | |
| 518 | // IMPORTANT! |
| 519 | // THE ORDER SHOULD BE THE SAME WITH THE VALUES! |
| 520 | buffer_rrdf_table_add_field( |
| 521 | wb, |
| 522 | fields_id++, |
| 523 | "PID", |
| 524 | "Process ID", |
| 525 | RRDF_FIELD_TYPE_INTEGER, |
| 526 | RRDF_FIELD_VISUAL_VALUE, |
| 527 | RRDF_FIELD_TRANSFORM_NUMBER, |
| 528 | 0, |
| 529 | NULL, |
| 530 | NAN, |
| 531 | RRDF_FIELD_SORT_ASCENDING, |
| 532 | NULL, |
| 533 | RRDF_FIELD_SUMMARY_COUNT, |
| 534 | RRDF_FIELD_FILTER_MULTISELECT, |
| 535 | RRDF_FIELD_OPTS_VISIBLE | RRDF_FIELD_OPTS_STICKY, |
| 536 | NULL); |
| 537 | |
| 538 | buffer_rrdf_table_add_field( |
| 539 | wb, |
| 540 | fields_id++, |
| 541 | "Name", |
| 542 | "Process Name", |
| 543 | RRDF_FIELD_TYPE_STRING, |
| 544 | RRDF_FIELD_VISUAL_VALUE, |
| 545 | RRDF_FIELD_TRANSFORM_NONE, |
| 546 | 0, |
| 547 | NULL, |
| 548 | NAN, |
| 549 | RRDF_FIELD_SORT_ASCENDING, |
| 550 | NULL, |
| 551 | RRDF_FIELD_SUMMARY_COUNT, |
| 552 | RRDF_FIELD_FILTER_MULTISELECT, |
| 553 | RRDF_FIELD_OPTS_VISIBLE | RRDF_FIELD_OPTS_UNIQUE_KEY | RRDF_FIELD_OPTS_STICKY | RRDF_FIELD_OPTS_FULL_WIDTH, |
| 554 | NULL); |
| 555 | |
| 556 | buffer_rrdf_table_add_field( |
| 557 | wb, |
| 558 | fields_id++, |
| 559 | "Origin", |
| 560 | "Connection Origin", |
| 561 | RRDF_FIELD_TYPE_STRING, |
| 562 | RRDF_FIELD_VISUAL_VALUE, |
| 563 | RRDF_FIELD_TRANSFORM_NONE, |
| 564 | 0, |
| 565 | NULL, |
| 566 | NAN, |
| 567 | RRDF_FIELD_SORT_ASCENDING, |
| 568 | NULL, |
| 569 | RRDF_FIELD_SUMMARY_COUNT, |
| 570 | RRDF_FIELD_FILTER_MULTISELECT, |
| 571 | RRDF_FIELD_OPTS_VISIBLE | RRDF_FIELD_OPTS_UNIQUE_KEY | RRDF_FIELD_OPTS_STICKY, |
| 572 | NULL); |
| 573 | |
| 574 | buffer_rrdf_table_add_field( |
| 575 | wb, |
| 576 | fields_id++, |
| 577 | "Src", |
| 578 | "Source IP Address", |
| 579 | RRDF_FIELD_TYPE_STRING, |
| 580 | RRDF_FIELD_VISUAL_VALUE, |
| 581 | RRDF_FIELD_TRANSFORM_NONE, |
| 582 | 0, |
| 583 | NULL, |
| 584 | NAN, |
| 585 | RRDF_FIELD_SORT_ASCENDING, |
| 586 | NULL, |
| 587 | RRDF_FIELD_SUMMARY_COUNT, |
| 588 | RRDF_FIELD_FILTER_MULTISELECT, |
| 589 | RRDF_FIELD_OPTS_VISIBLE | RRDF_FIELD_OPTS_UNIQUE_KEY | RRDF_FIELD_OPTS_STICKY, |
| 590 | NULL); |
| 591 | |
| 592 | /* |
| 593 | buffer_rrdf_table_add_field(wb, fields_id++, "SrcPort", "Source Port", RRDF_FIELD_TYPE_INTEGER, |
| 594 | RRDF_FIELD_VISUAL_VALUE, RRDF_FIELD_TRANSFORM_NUMBER, 0, NULL, NAN, |
| 595 | RRDF_FIELD_SORT_ASCENDING, NULL, RRDF_FIELD_SUMMARY_COUNT, |
| 596 | RRDF_FIELD_FILTER_MULTISELECT, |
| 597 | RRDF_FIELD_OPTS_VISIBLE | RRDF_FIELD_OPTS_STICKY, |
| 598 | NULL); |
| 599 | */ |
| 600 | |
| 601 | buffer_rrdf_table_add_field( |
| 602 | wb, |
| 603 | fields_id++, |
| 604 | "Dst", |
| 605 | "Destination IP Address", |
| 606 | RRDF_FIELD_TYPE_STRING, |
| 607 | RRDF_FIELD_VISUAL_VALUE, |
| 608 | RRDF_FIELD_TRANSFORM_NONE, |
| 609 | 0, |
| 610 | NULL, |
| 611 | NAN, |
| 612 | RRDF_FIELD_SORT_ASCENDING, |
| 613 | NULL, |
| 614 | RRDF_FIELD_SUMMARY_COUNT, |
| 615 | RRDF_FIELD_FILTER_MULTISELECT, |
| 616 | RRDF_FIELD_OPTS_VISIBLE | RRDF_FIELD_OPTS_UNIQUE_KEY | RRDF_FIELD_OPTS_STICKY, |
| 617 | NULL); |
| 618 | |
| 619 | buffer_rrdf_table_add_field( |
| 620 | wb, |
| 621 | fields_id++, |
| 622 | "DstPort", |
| 623 | "Destination Port", |
| 624 | RRDF_FIELD_TYPE_STRING, |
| 625 | RRDF_FIELD_VISUAL_VALUE, |
| 626 | RRDF_FIELD_TRANSFORM_NONE, |
| 627 | 0, |
| 628 | NULL, |
| 629 | NAN, |
| 630 | RRDF_FIELD_SORT_ASCENDING, |
| 631 | NULL, |
| 632 | RRDF_FIELD_SUMMARY_COUNT, |
| 633 | RRDF_FIELD_FILTER_MULTISELECT, |
| 634 | RRDF_FIELD_OPTS_VISIBLE | RRDF_FIELD_OPTS_UNIQUE_KEY | RRDF_FIELD_OPTS_STICKY, |
| 635 | NULL); |
| 636 | |
| 637 | buffer_rrdf_table_add_field( |
| 638 | wb, |
| 639 | fields_id++, |
| 640 | "Protocol", |
| 641 | "Transport Layer Protocol", |
| 642 | RRDF_FIELD_TYPE_STRING, |
| 643 | RRDF_FIELD_VISUAL_VALUE, |
| 644 | RRDF_FIELD_TRANSFORM_NONE, |
| 645 | 0, |
| 646 | NULL, |
| 647 | NAN, |
| 648 | RRDF_FIELD_SORT_ASCENDING, |
| 649 | NULL, |
| 650 | RRDF_FIELD_SUMMARY_COUNT, |
| 651 | RRDF_FIELD_FILTER_MULTISELECT, |
| 652 | RRDF_FIELD_OPTS_NONE | RRDF_FIELD_OPTS_UNIQUE_KEY | RRDF_FIELD_OPTS_STICKY, |
| 653 | NULL); |
| 654 | |
| 655 | buffer_rrdf_table_add_field( |
| 656 | wb, |
| 657 | fields_id++, |
| 658 | "Rcvd", |
| 659 | "Traffic Received", |
| 660 | RRDF_FIELD_TYPE_INTEGER, |
| 661 | RRDF_FIELD_VISUAL_VALUE, |
| 662 | RRDF_FIELD_TRANSFORM_NUMBER, |
| 663 | 3, |
| 664 | "MB", |
| 665 | NAN, |
| 666 | RRDF_FIELD_SORT_DESCENDING, |
| 667 | NULL, |
| 668 | RRDF_FIELD_SUMMARY_SUM, |
| 669 | RRDF_FIELD_FILTER_NONE, |
| 670 | RRDF_FIELD_OPTS_VISIBLE, |
| 671 | NULL); |
| 672 | |
| 673 | buffer_rrdf_table_add_field( |
| 674 | wb, |
| 675 | fields_id++, |
| 676 | "Sent", |
| 677 | "Traffic Sent", |
| 678 | RRDF_FIELD_TYPE_INTEGER, |
| 679 | RRDF_FIELD_VISUAL_VALUE, |
| 680 | RRDF_FIELD_TRANSFORM_NUMBER, |
| 681 | 3, |
| 682 | "MB", |
| 683 | NAN, |
| 684 | RRDF_FIELD_SORT_DESCENDING, |
| 685 | NULL, |
| 686 | RRDF_FIELD_SUMMARY_SUM, |
| 687 | RRDF_FIELD_FILTER_NONE, |
| 688 | RRDF_FIELD_OPTS_VISIBLE, |
| 689 | NULL); |
| 690 | |
| 691 | buffer_rrdf_table_add_field( |
| 692 | wb, |
| 693 | fields_id, |
| 694 | "Conns", |
| 695 | "Connections", |
| 696 | RRDF_FIELD_TYPE_INTEGER, |
| 697 | RRDF_FIELD_VISUAL_VALUE, |
| 698 | RRDF_FIELD_TRANSFORM_NUMBER, |
| 699 | 0, |
| 700 | "connections", |
| 701 | NAN, |
| 702 | RRDF_FIELD_SORT_DESCENDING, |
| 703 | NULL, |
| 704 | RRDF_FIELD_SUMMARY_SUM, |
| 705 | RRDF_FIELD_FILTER_NONE, |
| 706 | RRDF_FIELD_OPTS_VISIBLE, |
| 707 | NULL); |
| 708 | } |
| 709 | buffer_json_object_close(wb); // columns |
| 710 | |
| 711 | buffer_json_member_add_string(wb, "default_sort_column", "Rcvd"); |
| 712 | |
| 713 | buffer_json_member_add_object(wb, "charts"); |
| 714 | { |
| 715 | buffer_json_member_add_object(wb, "Traffic"); |
| 716 | { |
| 717 | buffer_json_member_add_string(wb, "name", "Traffic"); |
| 718 | buffer_json_member_add_string(wb, "type", "stacked-bar"); |
| 719 | buffer_json_member_add_array(wb, "columns"); |
| 720 | { |
| 721 | buffer_json_add_array_item_string(wb, "Rcvd"); |
| 722 | buffer_json_add_array_item_string(wb, "Sent"); |
| 723 | } |
| 724 | buffer_json_array_close(wb); |
| 725 | } |
| 726 | buffer_json_object_close(wb); |
| 727 | |
| 728 | buffer_json_member_add_object(wb, "Connections"); |
| 729 | { |
| 730 | buffer_json_member_add_string(wb, "name", "Connections"); |
| 731 | buffer_json_member_add_string(wb, "type", "stacked-bar"); |
| 732 | buffer_json_member_add_array(wb, "columns"); |
| 733 | { |
| 734 | buffer_json_add_array_item_string(wb, "Conns"); |
| 735 | } |
| 736 | buffer_json_array_close(wb); |
| 737 | } |
| 738 | buffer_json_object_close(wb); |
| 739 | } |
| 740 | buffer_json_object_close(wb); // charts |
| 741 | |
| 742 | buffer_json_member_add_array(wb, "default_charts"); |
| 743 | { |
| 744 | buffer_json_add_array_item_array(wb); |
| 745 | buffer_json_add_array_item_string(wb, "Traffic"); |
| 746 | buffer_json_add_array_item_string(wb, "Name"); |
| 747 | buffer_json_array_close(wb); |
| 748 | |
| 749 | buffer_json_add_array_item_array(wb); |
| 750 | buffer_json_add_array_item_string(wb, "Connections"); |
| 751 | buffer_json_add_array_item_string(wb, "Name"); |
| 752 | buffer_json_array_close(wb); |
| 753 | } |
| 754 | buffer_json_array_close(wb); |
| 755 | |
| 756 | buffer_json_member_add_object(wb, "group_by"); |
| 757 | { |
| 758 | buffer_json_member_add_object(wb, "Name"); |
| 759 | { |
| 760 | buffer_json_member_add_string(wb, "name", "Process Name"); |
| 761 | buffer_json_member_add_array(wb, "columns"); |
| 762 | { |
| 763 | buffer_json_add_array_item_string(wb, "Name"); |
| 764 | } |
| 765 | buffer_json_array_close(wb); |
| 766 | } |
| 767 | buffer_json_object_close(wb); |
| 768 | |
| 769 | buffer_json_member_add_object(wb, "Origin"); |
| 770 | { |
| 771 | buffer_json_member_add_string(wb, "name", "Origin"); |
| 772 | buffer_json_member_add_array(wb, "columns"); |
| 773 | { |
| 774 | buffer_json_add_array_item_string(wb, "Origin"); |
| 775 | } |
| 776 | buffer_json_array_close(wb); |
| 777 | } |
| 778 | buffer_json_object_close(wb); |
| 779 | |
| 780 | buffer_json_member_add_object(wb, "Src"); |
| 781 | { |
| 782 | buffer_json_member_add_string(wb, "name", "Source IP"); |
| 783 | buffer_json_member_add_array(wb, "columns"); |
| 784 | { |
| 785 | buffer_json_add_array_item_string(wb, "Src"); |
| 786 | } |
| 787 | buffer_json_array_close(wb); |
| 788 | } |
| 789 | buffer_json_object_close(wb); |
| 790 | |
| 791 | buffer_json_member_add_object(wb, "Dst"); |
| 792 | { |
| 793 | buffer_json_member_add_string(wb, "name", "Destination IP"); |
| 794 | buffer_json_member_add_array(wb, "columns"); |
| 795 | { |
| 796 | buffer_json_add_array_item_string(wb, "Dst"); |
| 797 | } |
| 798 | buffer_json_array_close(wb); |
| 799 | } |
| 800 | buffer_json_object_close(wb); |
| 801 | |
| 802 | buffer_json_member_add_object(wb, "DstPort"); |
| 803 | { |
| 804 | buffer_json_member_add_string(wb, "name", "Destination Port"); |
| 805 | buffer_json_member_add_array(wb, "columns"); |
| 806 | { |
| 807 | buffer_json_add_array_item_string(wb, "DstPort"); |
| 808 | } |
| 809 | buffer_json_array_close(wb); |
| 810 | } |
| 811 | buffer_json_object_close(wb); |
| 812 | |
| 813 | buffer_json_member_add_object(wb, "Protocol"); |
| 814 | { |
| 815 | buffer_json_member_add_string(wb, "name", "Protocol"); |
| 816 | buffer_json_member_add_array(wb, "columns"); |
| 817 | { |
| 818 | buffer_json_add_array_item_string(wb, "Protocol"); |
| 819 | } |
| 820 | buffer_json_array_close(wb); |
| 821 | } |
| 822 | buffer_json_object_close(wb); |
| 823 | } |
| 824 | buffer_json_object_close(wb); // group_by |
| 825 | |
| 826 | close_and_send: |
| 827 | buffer_json_member_add_time_t(wb, "expires", now_s + em->update_every); |
| 828 | buffer_json_finalize(wb); |
| 829 | |
| 830 | // Lock necessary to avoid race condition |
| 831 | pluginsd_function_result_begin_to_stdout(transaction, HTTP_RESP_OK, "application/json", now_s + em->update_every); |
| 832 | |
| 833 | fwrite(buffer_tostring(wb), buffer_strlen(wb), 1, stdout); |
| 834 | |
| 835 | pluginsd_function_result_end_to_stdout(); |
| 836 | fflush(stdout); |
| 837 | |
| 838 | buffer_free(wb); |
| 839 | } |
| 840 | |
| 841 | /***************************************************************** |
| 842 | * EBPF FUNCTION THREAD |
| 843 | *****************************************************************/ |
| 844 | |
| 845 | /** |
| 846 | * FUNCTION thread. |
| 847 | * |
| 848 | * @param ptr a `ebpf_module_t *`. |
| 849 | * |
| 850 | * @return always NULL. |
| 851 | */ |
| 852 | void ebpf_function_thread(void *ptr) |
| 853 | { |
| 854 | (void)ptr; |
| 855 | |
| 856 | struct functions_evloop_globals *wg = functions_evloop_init(1, "EBPF", &lock, &ebpf_plugin_exit, NULL); |
| 857 | |
| 858 | functions_evloop_add_function( |
| 859 | wg, EBPF_FUNCTION_SOCKET, ebpf_function_socket_manipulation, PLUGINS_FUNCTIONS_TIMEOUT_DEFAULT, NULL); |
| 860 | |
| 861 | netdata_mutex_lock(&lock); |
| 862 | int i; |
| 863 | for (i = 0; i < EBPF_MODULE_FUNCTION_IDX; i++) { |
| 864 | ebpf_module_t *em = &ebpf_modules[i]; |
| 865 | if (!em->functions.fnct_routine) |
| 866 | continue; |
| 867 | |
| 868 | EBPF_PLUGIN_FUNCTIONS(em->functions.fcnt_name, em->functions.fcnt_desc, em->update_every); |
| 869 | } |
| 870 | netdata_mutex_unlock(&lock); |
| 871 | |
| 872 | heartbeat_t hb; |
| 873 | heartbeat_init(&hb, USEC_PER_SEC); |
| 874 | while (!ebpf_plugin_stop()) { |
| 875 | if (ebpf_plugin_stop()) { |
| 876 | break; |
| 877 | } |
| 878 | |
| 879 | heartbeat_next(&hb); |
| 880 | |
| 881 | if (ebpf_plugin_stop()) { |
| 882 | break; |
| 883 | } |
| 884 | } |
| 885 | } |