| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #ifndef NETDATA_LOCAL_SOCKETS_H |
| 4 | #define NETDATA_LOCAL_SOCKETS_H |
| 5 | |
| 6 | #include "libnetdata/libnetdata.h" |
| 7 | |
| 8 | #ifndef _countof |
| 9 | #define _countof(x) (sizeof(x) / sizeof(*(x))) |
| 10 | #endif |
| 11 | |
| 12 | // Network-namespace switching via setns() is Linux-only. |
| 13 | #if defined(OS_LINUX) |
| 14 | #define LOCAL_SOCKETS_USE_SETNS |
| 15 | #define USE_LIBMNL_AFTER_SETNS |
| 16 | #endif |
| 17 | |
| 18 | #if defined(HAVE_LIBMNL) |
| 19 | #include <linux/rtnetlink.h> |
| 20 | #include <linux/inet_diag.h> |
| 21 | #include <linux/sock_diag.h> |
| 22 | #include <linux/unix_diag.h> |
| 23 | #include <linux/netlink.h> |
| 24 | #include <libmnl/libmnl.h> |
| 25 | #endif |
| 26 | |
| 27 | #define UID_UNSET (uid_t)(UINT32_MAX) |
| 28 | |
| 29 | // FreeBSD uses TCPS_* values from tcp_fsm.h (different numbering from Linux). |
| 30 | // Define Linux-compatible TCP_* constants here so the rest of the code — |
| 31 | // direction detection (TCP_LISTEN check) and TCP_STATE_2str display — works |
| 32 | // unchanged on FreeBSD. The FreeBSD backend converts TCPS_* → TCP_* before |
| 33 | // storing the state in LOCAL_SOCKET.state. |
| 34 | #if defined(OS_FREEBSD) |
| 35 | #define TCP_ESTABLISHED 1 |
| 36 | #define TCP_SYN_SENT 2 |
| 37 | #define TCP_SYN_RECV 3 |
| 38 | #define TCP_FIN_WAIT1 4 |
| 39 | #define TCP_FIN_WAIT2 5 |
| 40 | #define TCP_TIME_WAIT 6 |
| 41 | #define TCP_CLOSE 7 |
| 42 | #define TCP_CLOSE_WAIT 8 |
| 43 | #define TCP_LAST_ACK 9 |
| 44 | #define TCP_LISTEN 10 |
| 45 | #define TCP_CLOSING 11 |
| 46 | #endif |
| 47 | |
| 48 | // max cmdline bytes read from /proc/<pid>/cmdline — reader-side guard must match |
| 49 | #define LOCAL_SOCKETS_CMDLINE_MAX 8192 |
| 50 | |
| 51 | // -------------------------------------------------------------------------------------------------------------------- |
| 52 | // hashtable for keeping the namespaces |
| 53 | // key and value is the namespace inode |
| 54 | |
| 55 | #define SIMPLE_HASHTABLE_KEY_TYPE uint64_t |
| 56 | #define SIMPLE_HASHTABLE_VALUE_TYPE_IS_NOT_POINTER |
| 57 | #define SIMPLE_HASHTABLE_VALUE_TYPE uint64_t |
| 58 | #define SIMPLE_HASHTABLE_NAME _NET_NS |
| 59 | #include "libnetdata/simple_hashtable/simple_hashtable.h" |
| 60 | |
| 61 | // -------------------------------------------------------------------------------------------------------------------- |
| 62 | // hashtable for keeping the sockets of PIDs |
| 63 | // key is the inode |
| 64 | |
| 65 | struct pid_socket; |
| 66 | #define SIMPLE_HASHTABLE_VALUE_TYPE struct pid_socket * |
| 67 | #define SIMPLE_HASHTABLE_NAME _PID_SOCKET |
| 68 | #include "libnetdata/simple_hashtable/simple_hashtable.h" |
| 69 | |
| 70 | // -------------------------------------------------------------------------------------------------------------------- |
| 71 | // hashtable for keeping all the sockets |
| 72 | // key is the inode |
| 73 | |
| 74 | struct local_socket; |
| 75 | #define SIMPLE_HASHTABLE_VALUE_TYPE struct local_socket * |
| 76 | #define SIMPLE_HASHTABLE_NAME _LOCAL_SOCKET |
| 77 | #include "libnetdata/simple_hashtable/simple_hashtable.h" |
| 78 | |
| 79 | // -------------------------------------------------------------------------------------------------------------------- |
| 80 | // hashtable for keeping all local IPs |
| 81 | // key is XXH3_64bits hash of the IP |
| 82 | |
| 83 | union ipv46; |
| 84 | #define SIMPLE_HASHTABLE_VALUE_TYPE union ipv46 * |
| 85 | #define SIMPLE_HASHTABLE_NAME _LOCAL_IP |
| 86 | #include "libnetdata/simple_hashtable/simple_hashtable.h" |
| 87 | |
| 88 | // -------------------------------------------------------------------------------------------------------------------- |
| 89 | // hashtable for keeping all listening ports |
| 90 | // key is XXH3_64bits hash of the family, protocol, port number, namespace |
| 91 | |
| 92 | struct local_port; |
| 93 | #define SIMPLE_HASHTABLE_VALUE_TYPE struct local_port * |
| 94 | #define SIMPLE_HASHTABLE_NAME _LISTENING_PORT |
| 95 | #include "libnetdata/simple_hashtable/simple_hashtable.h" |
| 96 | |
| 97 | // -------------------------------------------------------------------------------------------------------------------- |
| 98 | |
| 99 | struct local_socket_state; |
| 100 | typedef void (*local_sockets_cb_t)(struct local_socket_state *state, const struct local_socket *n, void *data); |
| 101 | |
| 102 | struct local_sockets_config { |
| 103 | bool listening; |
| 104 | bool inbound; |
| 105 | bool outbound; |
| 106 | bool local; |
| 107 | bool tcp4; |
| 108 | bool tcp6; |
| 109 | bool udp4; |
| 110 | bool udp6; |
| 111 | bool pid; |
| 112 | bool cmdline; |
| 113 | bool comm; |
| 114 | bool uid; |
| 115 | bool namespaces; |
| 116 | bool tcp_info; |
| 117 | bool no_mnl; |
| 118 | bool procfile; |
| 119 | bool report; |
| 120 | |
| 121 | size_t max_errors; |
| 122 | size_t max_concurrent_namespaces; |
| 123 | |
| 124 | local_sockets_cb_t cb; |
| 125 | void *data; |
| 126 | |
| 127 | const char *host_prefix; |
| 128 | }; |
| 129 | |
| 130 | struct local_sockets_state { |
| 131 | uint32_t nl_seq; |
| 132 | uint64_t net_ns_inode; |
| 133 | pid_t net_ns_pid; |
| 134 | }; |
| 135 | |
| 136 | struct timing_work { |
| 137 | usec_t start_ut; |
| 138 | usec_t end_ut; |
| 139 | const char *name; |
| 140 | }; |
| 141 | |
| 142 | struct local_sockets_ns_req { |
| 143 | struct local_sockets_config config; |
| 144 | struct local_sockets_state ns_state; |
| 145 | }; |
| 146 | |
| 147 | typedef struct local_socket_state { |
| 148 | struct local_sockets_config config; |
| 149 | struct local_sockets_state ns_state; |
| 150 | |
| 151 | struct { |
| 152 | size_t mnl_sends; |
| 153 | size_t tcp_info_received; |
| 154 | size_t pid_fds_processed; |
| 155 | size_t pid_fds_opendir_failed; |
| 156 | size_t pid_fds_readlink_failed; |
| 157 | size_t pid_fds_parse_failed; |
| 158 | size_t errors_encountered; |
| 159 | |
| 160 | size_t sockets_added; |
| 161 | |
| 162 | size_t namespaces_found; |
| 163 | size_t namespaces_absent; |
| 164 | size_t namespaces_invalid; |
| 165 | #if defined(LOCAL_SOCKETS_USE_SETNS) |
| 166 | size_t namespaces_forks_attempted; |
| 167 | size_t namespaces_forks_failed; |
| 168 | size_t namespaces_forks_unresponsive; |
| 169 | size_t namespaces_sockets_new; |
| 170 | size_t namespaces_sockets_existing; |
| 171 | #endif |
| 172 | |
| 173 | struct procfile_stats ff; |
| 174 | } stats; |
| 175 | |
| 176 | size_t timings_idx; |
| 177 | struct timing_work timings[30]; |
| 178 | |
| 179 | #if defined(LOCAL_SOCKETS_USE_SETNS) |
| 180 | bool spawn_server_is_mine; |
| 181 | SPAWN_SERVER *spawn_server; |
| 182 | #endif |
| 183 | |
| 184 | #if defined(HAVE_LIBMNL) |
| 185 | uint16_t tmp_protocol; |
| 186 | #endif |
| 187 | |
| 188 | procfile *ff; |
| 189 | |
| 190 | ARAL *local_socket_aral; |
| 191 | ARAL *pid_socket_aral; |
| 192 | SPINLOCK spinlock; // for namespaces |
| 193 | |
| 194 | uint64_t proc_self_net_ns_inode; |
| 195 | |
| 196 | SIMPLE_HASHTABLE_NET_NS ns_hashtable; |
| 197 | SIMPLE_HASHTABLE_PID_SOCKET pid_sockets_hashtable; |
| 198 | SIMPLE_HASHTABLE_LOCAL_SOCKET sockets_hashtable; |
| 199 | SIMPLE_HASHTABLE_LOCAL_IP local_ips_hashtable; |
| 200 | SIMPLE_HASHTABLE_LISTENING_PORT listening_ports_hashtable; |
| 201 | } LS_STATE; |
| 202 | |
| 203 | // -------------------------------------------------------------------------------------------------------------------- |
| 204 | |
| 205 | typedef enum __attribute__((packed)) { |
| 206 | SOCKET_DIRECTION_NONE = 0, |
| 207 | SOCKET_DIRECTION_LISTEN = (1 << 0), // a listening socket |
| 208 | SOCKET_DIRECTION_INBOUND = (1 << 1), // an inbound socket connecting a remote system to a local listening socket |
| 209 | SOCKET_DIRECTION_OUTBOUND = (1 << 2), // a socket initiated by this system, connecting to another system |
| 210 | SOCKET_DIRECTION_LOCAL_INBOUND = (1 << 3), // the socket connecting 2 localhost applications |
| 211 | SOCKET_DIRECTION_LOCAL_OUTBOUND = (1 << 4), // the socket connecting 2 localhost applications |
| 212 | } SOCKET_DIRECTION; |
| 213 | |
| 214 | #ifndef TASK_COMM_LEN |
| 215 | #define TASK_COMM_LEN 16 |
| 216 | #endif |
| 217 | |
| 218 | struct pid_socket { |
| 219 | uint64_t inode; |
| 220 | pid_t pid; |
| 221 | pid_t ppid; |
| 222 | uid_t uid; |
| 223 | uint64_t net_ns_inode; |
| 224 | char *cmdline; |
| 225 | char comm[TASK_COMM_LEN]; |
| 226 | }; |
| 227 | |
| 228 | struct local_port { |
| 229 | uint16_t protocol; |
| 230 | uint16_t family; |
| 231 | uint16_t port; |
| 232 | uint64_t net_ns_inode; |
| 233 | }; |
| 234 | |
| 235 | union ipv46 { |
| 236 | uint32_t ipv4; |
| 237 | struct in6_addr ipv6; |
| 238 | }; |
| 239 | |
| 240 | struct socket_endpoint { |
| 241 | uint16_t protocol; |
| 242 | uint16_t family; |
| 243 | uint16_t port; |
| 244 | union ipv46 ip; |
| 245 | }; |
| 246 | |
| 247 | static inline void ipv6_to_in6_addr(const char *ipv6_str, struct in6_addr *d) { |
| 248 | char buf[9]; |
| 249 | |
| 250 | for (size_t k = 0; k < 4; ++k) { |
| 251 | memcpy(buf, ipv6_str + (k * 8), 8); |
| 252 | buf[sizeof(buf) - 1] = '\0'; |
| 253 | d->s6_addr32[k] = str2uint32_hex(buf, NULL); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | typedef struct local_socket { |
| 258 | uint64_t inode; |
| 259 | uint64_t net_ns_inode; |
| 260 | |
| 261 | int state; |
| 262 | struct socket_endpoint local; |
| 263 | struct socket_endpoint remote; |
| 264 | pid_t pid; |
| 265 | pid_t ppid; |
| 266 | |
| 267 | SOCKET_DIRECTION direction; |
| 268 | |
| 269 | uint8_t timer; |
| 270 | uint8_t retransmits; // the # of packets currently queued for retransmission (not yet acknowledged) |
| 271 | uint32_t expires; |
| 272 | uint32_t rqueue; |
| 273 | uint32_t wqueue; |
| 274 | uid_t uid; |
| 275 | |
| 276 | struct { |
| 277 | bool checked; |
| 278 | bool ipv46; |
| 279 | } ipv6ony; |
| 280 | |
| 281 | union { |
| 282 | struct tcp_info tcp; |
| 283 | } info; |
| 284 | |
| 285 | char comm[TASK_COMM_LEN]; |
| 286 | STRING *cmdline; |
| 287 | |
| 288 | struct local_port local_port_key; |
| 289 | |
| 290 | XXH64_hash_t local_ip_hash; |
| 291 | XXH64_hash_t remote_ip_hash; |
| 292 | XXH64_hash_t local_port_hash; |
| 293 | |
| 294 | #ifdef LOCAL_SOCKETS_EXTENDED_MEMBERS |
| 295 | LOCAL_SOCKETS_EXTENDED_MEMBERS |
| 296 | #endif |
| 297 | } LOCAL_SOCKET; |
| 298 | |
| 299 | #if defined(LOCAL_SOCKETS_USE_SETNS) |
| 300 | static inline int local_sockets_spawn_server_callback(SPAWN_REQUEST *request); |
| 301 | #endif |
| 302 | |
| 303 | // -------------------------------------------------------------------------------------------------------------------- |
| 304 | |
| 305 | static inline void local_sockets_log(LS_STATE *ls, const char *format, ...) PRINTFLIKE(2, 3); |
| 306 | static inline void local_sockets_log(LS_STATE *ls, const char *format, ...) { |
| 307 | if(ls && ++ls->stats.errors_encountered == ls->config.max_errors) { |
| 308 | nd_log(NDLS_COLLECTORS, NDLP_ERR, "LOCAL-SOCKETS: max number of logs reached. Not logging anymore"); |
| 309 | return; |
| 310 | } |
| 311 | |
| 312 | if(ls && ls->stats.errors_encountered > ls->config.max_errors) |
| 313 | return; |
| 314 | |
| 315 | char buf[16384]; |
| 316 | va_list args; |
| 317 | va_start(args, format); |
| 318 | vsnprintf(buf, sizeof(buf), format, args); |
| 319 | va_end(args); |
| 320 | |
| 321 | nd_log(NDLS_COLLECTORS, NDLP_ERR, "LOCAL-SOCKETS: %s", buf); |
| 322 | } |
| 323 | |
| 324 | // -------------------------------------------------------------------------------------------------------------------- |
| 325 | |
| 326 | static bool local_sockets_is_ipv4_mapped_ipv6_address(const struct in6_addr *addr) { |
| 327 | // An IPv4-mapped IPv6 address starts with 80 bits of zeros followed by 16 bits of ones |
| 328 | static const unsigned char ipv4_mapped_prefix[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF }; |
| 329 | return memcmp(addr->s6_addr, ipv4_mapped_prefix, 12) == 0; |
| 330 | } |
| 331 | |
| 332 | static bool local_sockets_is_loopback_address(const struct socket_endpoint *se) { |
| 333 | if (se->family == AF_INET) { |
| 334 | // For IPv4, loopback addresses are in the 127.0.0.0/8 range |
| 335 | return (ntohl(se->ip.ipv4) >> 24) == 127; // Check if the first byte is 127 |
| 336 | } else if (se->family == AF_INET6) { |
| 337 | // Check if the address is an IPv4-mapped IPv6 address |
| 338 | if (local_sockets_is_ipv4_mapped_ipv6_address(&se->ip.ipv6)) { |
| 339 | // Extract the last 32 bits (IPv4 address) and check if it's in the 127.0.0.0/8 range |
| 340 | uint8_t *ip6 = (uint8_t *)&se->ip.ipv6; |
| 341 | const uint32_t ipv4_addr = *((const uint32_t *)(ip6 + 12)); |
| 342 | return (ntohl(ipv4_addr) >> 24) == 127; |
| 343 | } |
| 344 | |
| 345 | // For IPv6, loopback address is ::1 |
| 346 | return memcmp(&se->ip.ipv6, &in6addr_loopback, sizeof(se->ip.ipv6)) == 0; |
| 347 | } |
| 348 | |
| 349 | return false; |
| 350 | } |
| 351 | |
| 352 | static inline bool local_sockets_is_ipv4_reserved_address(uint32_t ip) { |
| 353 | // Check for the reserved address ranges |
| 354 | ip = ntohl(ip); |
| 355 | return ( |
| 356 | (ip >> 24 == 10) || // Private IP range (A class) |
| 357 | (ip >> 20 == (172 << 4) + 1) || // Private IP range (B class) |
| 358 | (ip >> 16 == (192 << 8) + 168) || // Private IP range (C class) |
| 359 | (ip >> 24 == 127) || // Loopback address (127.0.0.0) |
| 360 | (ip >> 24 == 0) || // Reserved (0.0.0.0) |
| 361 | (ip >> 24 == 169 && (ip >> 16) == 254) || // Link-local address (169.254.0.0) |
| 362 | (ip >> 16 == (192 << 8) + 0) // Test-Net (192.0.0.0) |
| 363 | ); |
| 364 | } |
| 365 | |
| 366 | static inline bool local_sockets_is_private_address(const struct socket_endpoint *se) { |
| 367 | if (se->family == AF_INET) { |
| 368 | return local_sockets_is_ipv4_reserved_address(se->ip.ipv4); |
| 369 | } |
| 370 | else if (se->family == AF_INET6) { |
| 371 | uint8_t *ip6 = (uint8_t *)&se->ip.ipv6; |
| 372 | |
| 373 | // Check if the address is an IPv4-mapped IPv6 address |
| 374 | if (local_sockets_is_ipv4_mapped_ipv6_address(&se->ip.ipv6)) { |
| 375 | // Extract the last 32 bits (IPv4 address) and check if it's in the 127.0.0.0/8 range |
| 376 | const uint32_t ipv4_addr = *((const uint32_t *)(ip6 + 12)); |
| 377 | return local_sockets_is_ipv4_reserved_address(ipv4_addr); |
| 378 | } |
| 379 | |
| 380 | // Check for link-local addresses (fe80::/10) |
| 381 | if ((ip6[0] == 0xFE) && ((ip6[1] & 0xC0) == 0x80)) |
| 382 | return true; |
| 383 | |
| 384 | // Check for Unique Local Addresses (ULA) (fc00::/7) |
| 385 | if ((ip6[0] & 0xFE) == 0xFC) |
| 386 | return true; |
| 387 | |
| 388 | // Check for multicast addresses (ff00::/8) |
| 389 | if (ip6[0] == 0xFF) |
| 390 | return true; |
| 391 | |
| 392 | // For IPv6, loopback address is :: or ::1 |
| 393 | return memcmp(&se->ip.ipv6, &in6addr_any, sizeof(se->ip.ipv6)) == 0 || |
| 394 | memcmp(&se->ip.ipv6, &in6addr_loopback, sizeof(se->ip.ipv6)) == 0; |
| 395 | } |
| 396 | |
| 397 | return false; |
| 398 | } |
| 399 | |
| 400 | static bool local_sockets_is_multicast_address(const struct socket_endpoint *se) { |
| 401 | if (se->family == AF_INET) { |
| 402 | // For IPv4, check if the address is 0.0.0.0 |
| 403 | uint32_t ip = htonl(se->ip.ipv4); |
| 404 | return (ip >= 0xE0000000 && ip <= 0xEFFFFFFF); // Multicast address range (224.0.0.0/4) |
| 405 | } |
| 406 | else if (se->family == AF_INET6) { |
| 407 | // For IPv6, check if the address is ff00::/8 |
| 408 | uint8_t *ip6 = (uint8_t *)&se->ip.ipv6; |
| 409 | return ip6[0] == 0xff; |
| 410 | } |
| 411 | |
| 412 | return false; |
| 413 | } |
| 414 | |
| 415 | static bool local_sockets_is_zero_address(const struct socket_endpoint *se) { |
| 416 | if (se->family == AF_INET) { |
| 417 | // For IPv4, check if the address is 0.0.0.0 |
| 418 | return se->ip.ipv4 == 0; |
| 419 | } |
| 420 | else if (se->family == AF_INET6) { |
| 421 | // For IPv6, check if the address is :: |
| 422 | return memcmp(&se->ip.ipv6, &in6addr_any, sizeof(se->ip.ipv6)) == 0; |
| 423 | } |
| 424 | |
| 425 | return false; |
| 426 | } |
| 427 | |
| 428 | static inline const char *local_sockets_address_space(const struct socket_endpoint *se) { |
| 429 | if(local_sockets_is_zero_address(se)) |
| 430 | return "zero"; |
| 431 | else if(local_sockets_is_loopback_address(se)) |
| 432 | return "loopback"; |
| 433 | else if(local_sockets_is_multicast_address(se)) |
| 434 | return "multicast"; |
| 435 | else if(local_sockets_is_private_address(se)) |
| 436 | return "private"; |
| 437 | else |
| 438 | return "public"; |
| 439 | } |
| 440 | |
| 441 | static inline void ipv6_address_to_txt(const struct in6_addr *in6_addr, char *dst) { |
| 442 | struct sockaddr_in6 sa = { 0 }; |
| 443 | |
| 444 | sa.sin6_family = AF_INET6; |
| 445 | sa.sin6_port = htons(0); |
| 446 | sa.sin6_addr = *in6_addr; |
| 447 | |
| 448 | // Convert to human-readable format |
| 449 | if (inet_ntop(AF_INET6, &(sa.sin6_addr), dst, INET6_ADDRSTRLEN) == NULL) |
| 450 | *dst = '\0'; |
| 451 | } |
| 452 | |
| 453 | static inline void ipv4_address_to_txt(uint32_t ip, char *dst) { |
| 454 | uint8_t octets[4]; |
| 455 | octets[0] = ip & 0xFF; |
| 456 | octets[1] = (ip >> 8) & 0xFF; |
| 457 | octets[2] = (ip >> 16) & 0xFF; |
| 458 | octets[3] = (ip >> 24) & 0xFF; |
| 459 | sprintf(dst, "%u.%u.%u.%u", octets[0], octets[1], octets[2], octets[3]); |
| 460 | } |
| 461 | |
| 462 | static inline bool is_local_socket_ipv46(const LOCAL_SOCKET *n) { |
| 463 | return n->local.family == AF_INET6 && |
| 464 | n->direction == SOCKET_DIRECTION_LISTEN && |
| 465 | local_sockets_is_zero_address(&n->local) && |
| 466 | n->ipv6ony.checked && |
| 467 | n->ipv6ony.ipv46; |
| 468 | } |
| 469 | |
| 470 | static inline const char *local_sockets_protocol_name(LOCAL_SOCKET *n) { |
| 471 | if(n->local.family == AF_INET) { |
| 472 | if(n->local.protocol == IPPROTO_TCP) |
| 473 | return "TCP"; |
| 474 | else if(n->local.protocol == IPPROTO_UDP) |
| 475 | return "UDP"; |
| 476 | else |
| 477 | return "UNKNOWN_IPV4"; |
| 478 | } |
| 479 | else if(is_local_socket_ipv46(n)) { |
| 480 | if (n->local.protocol == IPPROTO_TCP) |
| 481 | return "TCP46"; |
| 482 | else if(n->local.protocol == IPPROTO_UDP) |
| 483 | return "UDP46"; |
| 484 | else |
| 485 | return "UNKNOWN_IPV46"; |
| 486 | } |
| 487 | else if(n->local.family == AF_INET6) { |
| 488 | if (n->local.protocol == IPPROTO_TCP) |
| 489 | return "TCP6"; |
| 490 | else if(n->local.protocol == IPPROTO_UDP) |
| 491 | return "UDP6"; |
| 492 | else |
| 493 | return "UNKNOWN_IPV6"; |
| 494 | } |
| 495 | else |
| 496 | return "UNKNOWN"; |
| 497 | } |
| 498 | |
| 499 | static inline void local_listeners_print_socket(LS_STATE *ls __maybe_unused, const LOCAL_SOCKET *nn, void *data __maybe_unused) { |
| 500 | LOCAL_SOCKET *n = (LOCAL_SOCKET *)nn; |
| 501 | |
| 502 | char local_address[INET6_ADDRSTRLEN] = ""; |
| 503 | char remote_address[INET6_ADDRSTRLEN] = ""; |
| 504 | |
| 505 | if(n->local.family == AF_INET) { |
| 506 | ipv4_address_to_txt(n->local.ip.ipv4, local_address); |
| 507 | ipv4_address_to_txt(n->remote.ip.ipv4, remote_address); |
| 508 | } |
| 509 | else if(n->local.family == AF_INET6) { |
| 510 | ipv6_address_to_txt(&n->local.ip.ipv6, local_address); |
| 511 | ipv6_address_to_txt(&n->remote.ip.ipv6, remote_address); |
| 512 | } |
| 513 | |
| 514 | printf("%s, direction=%s%s%s%s%s pid=%d, ppid=%d, state=0x%0x, ns=%"PRIu64", local=%s[:%u], remote=%s[:%u], uid=%u, inode=%"PRIu64", comm=%s\n", |
| 515 | local_sockets_protocol_name(n), |
| 516 | (n->direction & SOCKET_DIRECTION_LISTEN) ? "LISTEN," : "", |
| 517 | (n->direction & SOCKET_DIRECTION_INBOUND) ? "INBOUND," : "", |
| 518 | (n->direction & SOCKET_DIRECTION_OUTBOUND) ? "OUTBOUND," : "", |
| 519 | (n->direction & (SOCKET_DIRECTION_LOCAL_INBOUND|SOCKET_DIRECTION_LOCAL_OUTBOUND)) ? "LOCAL," : "", |
| 520 | (n->direction == 0) ? "NONE," : "", |
| 521 | n->pid, |
| 522 | n->ppid, |
| 523 | (unsigned int)n->state, |
| 524 | n->net_ns_inode, |
| 525 | local_address, n->local.port, |
| 526 | remote_address, n->remote.port, |
| 527 | n->uid, |
| 528 | n->inode, |
| 529 | n->comm); |
| 530 | } |
| 531 | |
| 532 | // -------------------------------------------------------------------------------------------------------------------- |
| 533 | |
| 534 | static void local_sockets_foreach_local_socket_call_cb(LS_STATE *ls) { |
| 535 | for(SIMPLE_HASHTABLE_SLOT_LOCAL_SOCKET *sl = simple_hashtable_first_read_only_LOCAL_SOCKET(&ls->sockets_hashtable); |
| 536 | sl; |
| 537 | sl = simple_hashtable_next_read_only_LOCAL_SOCKET(&ls->sockets_hashtable, sl)) { |
| 538 | LOCAL_SOCKET *n = SIMPLE_HASHTABLE_SLOT_DATA(sl); |
| 539 | if(!n) continue; |
| 540 | |
| 541 | if((ls->config.listening && n->direction & SOCKET_DIRECTION_LISTEN) || |
| 542 | (ls->config.local && n->direction & (SOCKET_DIRECTION_LOCAL_INBOUND|SOCKET_DIRECTION_LOCAL_OUTBOUND)) || |
| 543 | (ls->config.inbound && n->direction & SOCKET_DIRECTION_INBOUND) || |
| 544 | (ls->config.outbound && n->direction & SOCKET_DIRECTION_OUTBOUND) |
| 545 | ) { |
| 546 | // we have to call the callback for this socket |
| 547 | if (ls->config.cb) |
| 548 | ls->config.cb(ls, n, ls->config.data); |
| 549 | } |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | // -------------------------------------------------------------------------------------------------------------------- |
| 554 | |
| 555 | static inline void local_sockets_fix_cmdline(char* str) { |
| 556 | char *s = str; |
| 557 | |
| 558 | // map invalid characters to underscores |
| 559 | while(*s) { |
| 560 | if(*s == '|' || iscntrl(*s)) *s = '_'; |
| 561 | s++; |
| 562 | } |
| 563 | } |
| 564 | |
| 565 | // -------------------------------------------------------------------------------------------------------------------- |
| 566 | |
| 567 | static inline bool |
| 568 | local_sockets_read_proc_inode_link(LS_STATE *ls, const char *filename, uint64_t *inode, const char *type) { |
| 569 | char link_target[FILENAME_MAX + 1]; |
| 570 | |
| 571 | *inode = 0; |
| 572 | |
| 573 | ssize_t len = readlink(filename, link_target, sizeof(link_target) - 1); |
| 574 | if (len == -1) { |
| 575 | local_sockets_log(ls, "cannot read '%s' link '%s'", type, filename); |
| 576 | |
| 577 | ls->stats.pid_fds_readlink_failed++; |
| 578 | return false; |
| 579 | } |
| 580 | link_target[len] = '\0'; |
| 581 | |
| 582 | len = strlen(type); |
| 583 | if(strncmp(link_target, type, len) == 0 && link_target[len] == ':' && link_target[len + 1] == '[' && isdigit(link_target[len + 2])) { |
| 584 | *inode = strtoull(&link_target[len + 2], NULL, 10); |
| 585 | // ll_log(ls, "read link of type '%s' '%s' from '%s', inode = %"PRIu64, type, link_target, filename, *inode); |
| 586 | return true; |
| 587 | } |
| 588 | else { |
| 589 | // ll_log(ls, "cannot read '%s' link '%s' from '%s'", type, link_target, filename); |
| 590 | ls->stats.pid_fds_processed++; |
| 591 | return false; |
| 592 | } |
| 593 | } |
| 594 | |
| 595 | #if !defined(OS_FREEBSD) // /proc-based PID + FD walking is Linux-only |
| 596 | |
| 597 | static inline bool local_sockets_is_path_a_pid(const char *s) { |
| 598 | if(!s || !*s) return false; |
| 599 | |
| 600 | while(*s) { |
| 601 | if(!isdigit(*s++)) |
| 602 | return false; |
| 603 | } |
| 604 | |
| 605 | return true; |
| 606 | } |
| 607 | |
| 608 | static inline bool local_sockets_find_all_sockets_in_proc(LS_STATE *ls, const char *proc_filename) { |
| 609 | DIR *proc_dir; |
| 610 | struct dirent *proc_entry; |
| 611 | char filename[FILENAME_MAX + 1]; |
| 612 | char comm[TASK_COMM_LEN]; |
| 613 | char cmdline[LOCAL_SOCKETS_CMDLINE_MAX]; |
| 614 | const char *cmdline_trimmed; |
| 615 | uint64_t net_ns_inode; |
| 616 | |
| 617 | proc_dir = opendir(proc_filename); |
| 618 | if (proc_dir == NULL) { |
| 619 | local_sockets_log(ls, "cannot opendir() '%s'", proc_filename); |
| 620 | ls->stats.pid_fds_readlink_failed++; |
| 621 | return false; |
| 622 | } |
| 623 | |
| 624 | while ((proc_entry = readdir(proc_dir)) != NULL) { |
| 625 | if(proc_entry->d_type != DT_DIR) |
| 626 | continue; |
| 627 | |
| 628 | if(!strcmp(proc_entry->d_name, ".") || !strcmp(proc_entry->d_name, "..")) |
| 629 | continue; |
| 630 | |
| 631 | if(!local_sockets_is_path_a_pid(proc_entry->d_name)) |
| 632 | continue; |
| 633 | |
| 634 | // Build the path to the fd directory of the process |
| 635 | snprintfz(filename, FILENAME_MAX, "%s/%s/fd/", proc_filename, proc_entry->d_name); |
| 636 | DIR *fd_dir = opendir(filename); |
| 637 | if (fd_dir == NULL) { |
| 638 | local_sockets_log(ls, "cannot opendir() '%s'", filename); |
| 639 | ls->stats.pid_fds_opendir_failed++; |
| 640 | continue; |
| 641 | } |
| 642 | |
| 643 | comm[0] = '\0'; |
| 644 | cmdline[0] = '\0'; |
| 645 | cmdline_trimmed = NULL; |
| 646 | pid_t pid = (pid_t)strtoul(proc_entry->d_name, NULL, 10); |
| 647 | if(!pid) { |
| 648 | local_sockets_log(ls, "cannot parse pid of '%s'", proc_entry->d_name); |
| 649 | closedir(fd_dir); |
| 650 | continue; |
| 651 | } |
| 652 | pid_t ppid = 0; |
| 653 | bool ppid_checked = false; |
| 654 | bool status_checked = false; |
| 655 | bool status_failed = false; |
| 656 | net_ns_inode = 0; |
| 657 | uid_t uid = UID_UNSET; |
| 658 | |
| 659 | struct dirent *fd_entry; |
| 660 | while ((fd_entry = readdir(fd_dir)) != NULL) { |
| 661 | if(fd_entry->d_type != DT_LNK) |
| 662 | continue; |
| 663 | |
| 664 | snprintfz(filename, sizeof(filename), "%s/%s/fd/%s", proc_filename, proc_entry->d_name, fd_entry->d_name); |
| 665 | uint64_t inode = 0; |
| 666 | if(!local_sockets_read_proc_inode_link(ls, filename, &inode, "socket")) |
| 667 | continue; |
| 668 | |
| 669 | // fprintf(stderr, "%d: PID %d is using socket inode %"PRIu64"\n", gettid_uncached(), pid, inode); |
| 670 | XXH64_hash_t inode_hash = XXH3_64bits(&inode, sizeof(inode)); |
| 671 | SIMPLE_HASHTABLE_SLOT_PID_SOCKET *sl = simple_hashtable_get_slot_PID_SOCKET(&ls->pid_sockets_hashtable, inode_hash, &inode, true); |
| 672 | struct pid_socket *ps = SIMPLE_HASHTABLE_SLOT_DATA(sl); |
| 673 | if(!ps || (ps->pid == 1 && pid != 1)) { |
| 674 | if(!status_checked && !status_failed && |
| 675 | ((uid == UID_UNSET && ls->config.uid) || (!ppid_checked && ls->config.pid))) { |
| 676 | char status_buf[512]; |
| 677 | |
| 678 | snprintfz(filename, sizeof(filename), "%s/%s/status", proc_filename, proc_entry->d_name); |
| 679 | if (read_txt_file(filename, status_buf, sizeof(status_buf))) { |
| 680 | status_failed = true; |
| 681 | local_sockets_log(ls, "cannot open file: %s\n", filename); |
| 682 | } |
| 683 | else { |
| 684 | status_checked = true; |
| 685 | if(ls->config.pid) |
| 686 | ppid_checked = true; |
| 687 | |
| 688 | if(ls->config.uid) { |
| 689 | char *u = strstr(status_buf, "Uid:"); |
| 690 | if(u) { |
| 691 | u += 4; |
| 692 | while(isspace((unsigned char)*u)) u++; // skip spaces |
| 693 | while(*u >= '0' && *u <= '9') u++; // skip the first number (real uid) |
| 694 | while(isspace((unsigned char)*u)) u++; // skip spaces again |
| 695 | uid = strtol(u, NULL, 10); // parse the 2nd number (effective uid) |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | if(ls->config.pid) { |
| 700 | char *p = strstr(status_buf, "PPid:"); |
| 701 | if(p) { |
| 702 | p += 5; |
| 703 | while(isspace((unsigned char)*p)) p++; // skip spaces |
| 704 | ppid = (pid_t)strtol(p, NULL, 10); // parse parent pid |
| 705 | } |
| 706 | } |
| 707 | } |
| 708 | } |
| 709 | if(!comm[0] && ls->config.comm) { |
| 710 | snprintfz(filename, sizeof(filename), "%s/%s/comm", proc_filename, proc_entry->d_name); |
| 711 | if (read_txt_file(filename, comm, sizeof(comm))) |
| 712 | local_sockets_log(ls, "cannot open file: %s\n", filename); |
| 713 | else { |
| 714 | size_t clen = strlen(comm); |
| 715 | if(comm[clen - 1] == '\n') |
| 716 | comm[clen - 1] = '\0'; |
| 717 | } |
| 718 | } |
| 719 | if(!cmdline[0] && ls->config.cmdline) { |
| 720 | snprintfz(filename, sizeof(filename), "%s/%s/cmdline", proc_filename, proc_entry->d_name); |
| 721 | if (read_proc_cmdline(filename, cmdline, sizeof(cmdline))) |
| 722 | local_sockets_log(ls, "cannot open file: %s\n", filename); |
| 723 | else { |
| 724 | local_sockets_fix_cmdline(cmdline); |
| 725 | cmdline_trimmed = trim(cmdline); |
| 726 | } |
| 727 | } |
| 728 | if(!net_ns_inode && ls->config.namespaces) { |
| 729 | snprintfz(filename, sizeof(filename), "%s/%s/ns/net", proc_filename, proc_entry->d_name); |
| 730 | if(local_sockets_read_proc_inode_link(ls, filename, &net_ns_inode, "net")) { |
| 731 | XXH64_hash_t net_ns_inode_hash = XXH3_64bits(&net_ns_inode, sizeof(net_ns_inode)); |
| 732 | SIMPLE_HASHTABLE_SLOT_NET_NS *sl_ns = simple_hashtable_get_slot_NET_NS(&ls->ns_hashtable, net_ns_inode_hash, &net_ns_inode, true); |
| 733 | simple_hashtable_set_slot_NET_NS(&ls->ns_hashtable, sl_ns, net_ns_inode, net_ns_inode); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | if(!ps) |
| 738 | ps = aral_callocz(ls->pid_socket_aral); |
| 739 | |
| 740 | ps->inode = inode; |
| 741 | ps->pid = pid; |
| 742 | ps->ppid = ppid; |
| 743 | ps->uid = uid; |
| 744 | ps->net_ns_inode = net_ns_inode; |
| 745 | strncpyz(ps->comm, comm, sizeof(ps->comm) - 1); |
| 746 | |
| 747 | if(ps->cmdline) |
| 748 | freez(ps->cmdline); |
| 749 | |
| 750 | ps->cmdline = cmdline_trimmed ? strdupz(cmdline_trimmed) : NULL; |
| 751 | simple_hashtable_set_slot_PID_SOCKET(&ls->pid_sockets_hashtable, sl, inode_hash, ps); |
| 752 | // fprintf(stderr, "%d: PID %d indexed for using socket inode %"PRIu64"\n", gettid_uncached(), pid, inode); |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | closedir(fd_dir); |
| 757 | } |
| 758 | |
| 759 | closedir(proc_dir); |
| 760 | return true; |
| 761 | } |
| 762 | |
| 763 | #endif // !OS_FREEBSD |
| 764 | |
| 765 | // -------------------------------------------------------------------------------------------------------------------- |
| 766 | |
| 767 | static inline void local_sockets_index_listening_port(LS_STATE *ls, LOCAL_SOCKET *n) { |
| 768 | if(n->direction & SOCKET_DIRECTION_LISTEN) { |
| 769 | // for the listening sockets, keep a hashtable with all the local ports |
| 770 | // so that we will be able to detect INBOUND sockets |
| 771 | |
| 772 | SIMPLE_HASHTABLE_SLOT_LISTENING_PORT *sl_port = |
| 773 | simple_hashtable_get_slot_LISTENING_PORT(&ls->listening_ports_hashtable, n->local_port_hash, &n->local_port_key, true); |
| 774 | |
| 775 | struct local_port *port = SIMPLE_HASHTABLE_SLOT_DATA(sl_port); |
| 776 | if(!port) |
| 777 | simple_hashtable_set_slot_LISTENING_PORT(&ls->listening_ports_hashtable, sl_port, n->local_port_hash, &n->local_port_key); |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | static inline bool local_sockets_add_socket(LS_STATE *ls, LOCAL_SOCKET *tmp) { |
| 782 | if(!tmp->inode) return false; |
| 783 | |
| 784 | XXH64_hash_t inode_hash = XXH3_64bits(&tmp->inode, sizeof(tmp->inode)); |
| 785 | SIMPLE_HASHTABLE_SLOT_LOCAL_SOCKET *sl = simple_hashtable_get_slot_LOCAL_SOCKET(&ls->sockets_hashtable, inode_hash, &tmp->inode, true); |
| 786 | LOCAL_SOCKET *n = SIMPLE_HASHTABLE_SLOT_DATA(sl); |
| 787 | if(n) { |
| 788 | local_sockets_log(ls, "inode %" PRIu64" already exists in hashtable - ignoring duplicate", tmp->inode); |
| 789 | return false; |
| 790 | } |
| 791 | |
| 792 | ls->stats.sockets_added++; |
| 793 | |
| 794 | n = aral_mallocz(ls->local_socket_aral); |
| 795 | *n = *tmp; // copy all contents |
| 796 | |
| 797 | // fix the key |
| 798 | n->local_port_key.port = n->local.port; |
| 799 | n->local_port_key.family = n->local.family; |
| 800 | n->local_port_key.protocol = n->local.protocol; |
| 801 | n->local_port_key.net_ns_inode = ls->proc_self_net_ns_inode; |
| 802 | |
| 803 | n->local_ip_hash = XXH3_64bits(&n->local.ip, sizeof(n->local.ip)); |
| 804 | n->remote_ip_hash = XXH3_64bits(&n->remote.ip, sizeof(n->remote.ip)); |
| 805 | n->local_port_hash = XXH3_64bits(&n->local_port_key, sizeof(n->local_port_key)); |
| 806 | |
| 807 | // --- look up a pid for it ----------------------------------------------------------------------------------- |
| 808 | |
| 809 | SIMPLE_HASHTABLE_SLOT_PID_SOCKET *sl_pid = simple_hashtable_get_slot_PID_SOCKET(&ls->pid_sockets_hashtable, inode_hash, &n->inode, false); |
| 810 | struct pid_socket *ps = SIMPLE_HASHTABLE_SLOT_DATA(sl_pid); |
| 811 | if(ps) { |
| 812 | n->net_ns_inode = ps->net_ns_inode; |
| 813 | n->pid = ps->pid; |
| 814 | n->ppid = ps->ppid; |
| 815 | |
| 816 | if(ps->uid != UID_UNSET && n->uid == UID_UNSET) |
| 817 | n->uid = ps->uid; |
| 818 | |
| 819 | if(ps->cmdline) { |
| 820 | if(n->cmdline) string_freez(n->cmdline); |
| 821 | n->cmdline = string_strdupz(ps->cmdline); |
| 822 | } |
| 823 | |
| 824 | strncpyz(n->comm, ps->comm, sizeof(n->comm) - 1); |
| 825 | } |
| 826 | // else |
| 827 | // fprintf(stderr, "%d: No PID found for inode %"PRIu64"\n", gettid_uncached(), n->inode); |
| 828 | |
| 829 | // --- index it ----------------------------------------------------------------------------------------------- |
| 830 | |
| 831 | simple_hashtable_set_slot_LOCAL_SOCKET(&ls->sockets_hashtable, sl, inode_hash, n); |
| 832 | |
| 833 | if(!local_sockets_is_zero_address(&n->local)) { |
| 834 | // put all the local IPs into the local_ips hashtable |
| 835 | // so, we learn all local IPs the system has |
| 836 | |
| 837 | SIMPLE_HASHTABLE_SLOT_LOCAL_IP *sl_ip = |
| 838 | simple_hashtable_get_slot_LOCAL_IP(&ls->local_ips_hashtable, n->local_ip_hash, &n->local.ip, true); |
| 839 | |
| 840 | union ipv46 *ip = SIMPLE_HASHTABLE_SLOT_DATA(sl_ip); |
| 841 | if(!ip) |
| 842 | simple_hashtable_set_slot_LOCAL_IP(&ls->local_ips_hashtable, sl_ip, n->local_ip_hash, &n->local.ip); |
| 843 | } |
| 844 | |
| 845 | // --- 1st phase for direction detection ---------------------------------------------------------------------- |
| 846 | |
| 847 | if((n->local.protocol == IPPROTO_TCP && n->state == TCP_LISTEN) || |
| 848 | local_sockets_is_zero_address(&n->local) || |
| 849 | local_sockets_is_zero_address(&n->remote)) { |
| 850 | // the socket is either in a TCP LISTEN, or |
| 851 | // the remote address is zero |
| 852 | n->direction |= SOCKET_DIRECTION_LISTEN; |
| 853 | } |
| 854 | else { |
| 855 | // we can't say yet if it is inbound or outboud |
| 856 | // so, mark it as both inbound and outbound |
| 857 | n->direction |= SOCKET_DIRECTION_INBOUND | SOCKET_DIRECTION_OUTBOUND; |
| 858 | } |
| 859 | |
| 860 | // --- index it in LISTENING_PORT ----------------------------------------------------------------------------- |
| 861 | |
| 862 | local_sockets_index_listening_port(ls, n); |
| 863 | |
| 864 | return true; |
| 865 | } |
| 866 | |
| 867 | #if defined(HAVE_LIBMNL) |
| 868 | |
| 869 | static inline int local_sockets_libmnl_cb_data(const struct nlmsghdr *nlh, void *data) { |
| 870 | LS_STATE *ls = data; |
| 871 | |
| 872 | struct inet_diag_msg *diag_msg = mnl_nlmsg_get_payload(nlh); |
| 873 | |
| 874 | LOCAL_SOCKET n = { |
| 875 | .inode = diag_msg->idiag_inode, |
| 876 | .direction = SOCKET_DIRECTION_NONE, |
| 877 | .state = diag_msg->idiag_state, |
| 878 | .ipv6ony = { |
| 879 | .checked = false, |
| 880 | .ipv46 = false, |
| 881 | }, |
| 882 | .local = { |
| 883 | .protocol = ls->tmp_protocol, |
| 884 | .family = diag_msg->idiag_family, |
| 885 | .port = ntohs(diag_msg->id.idiag_sport), |
| 886 | }, |
| 887 | .remote = { |
| 888 | .protocol = ls->tmp_protocol, |
| 889 | .family = diag_msg->idiag_family, |
| 890 | .port = ntohs(diag_msg->id.idiag_dport), |
| 891 | }, |
| 892 | .timer = diag_msg->idiag_timer, |
| 893 | .retransmits = diag_msg->idiag_retrans, |
| 894 | .expires = diag_msg->idiag_expires, |
| 895 | .rqueue = diag_msg->idiag_rqueue, |
| 896 | .wqueue = diag_msg->idiag_wqueue, |
| 897 | .uid = diag_msg->idiag_uid, |
| 898 | }; |
| 899 | |
| 900 | if (diag_msg->idiag_family == AF_INET) { |
| 901 | memcpy(&n.local.ip.ipv4, diag_msg->id.idiag_src, sizeof(n.local.ip.ipv4)); |
| 902 | memcpy(&n.remote.ip.ipv4, diag_msg->id.idiag_dst, sizeof(n.remote.ip.ipv4)); |
| 903 | } |
| 904 | else if (diag_msg->idiag_family == AF_INET6) { |
| 905 | memcpy(&n.local.ip.ipv6, diag_msg->id.idiag_src, sizeof(n.local.ip.ipv6)); |
| 906 | memcpy(&n.remote.ip.ipv6, diag_msg->id.idiag_dst, sizeof(n.remote.ip.ipv6)); |
| 907 | } |
| 908 | |
| 909 | struct rtattr *attr = (struct rtattr *)(diag_msg + 1); |
| 910 | int rtattrlen = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*diag_msg)); |
| 911 | for (; !n.ipv6ony.checked && RTA_OK(attr, rtattrlen); attr = RTA_NEXT(attr, rtattrlen)) { |
| 912 | switch (attr->rta_type) { |
| 913 | case INET_DIAG_INFO: { |
| 914 | if(ls->tmp_protocol == IPPROTO_TCP) { |
| 915 | struct tcp_info *info = (struct tcp_info *)RTA_DATA(attr); |
| 916 | n.info.tcp = *info; |
| 917 | ls->stats.tcp_info_received++; |
| 918 | } |
| 919 | } |
| 920 | break; |
| 921 | |
| 922 | case INET_DIAG_SKV6ONLY: { |
| 923 | n.ipv6ony.checked = true; |
| 924 | int ipv6only = *(int *)RTA_DATA(attr); |
| 925 | n.ipv6ony.ipv46 = !ipv6only; |
| 926 | } |
| 927 | break; |
| 928 | |
| 929 | default: |
| 930 | break; |
| 931 | } |
| 932 | } |
| 933 | |
| 934 | local_sockets_add_socket(ls, &n); |
| 935 | |
| 936 | return MNL_CB_OK; |
| 937 | } |
| 938 | |
| 939 | static inline bool local_sockets_libmnl_get_sockets(LS_STATE *ls, uint16_t family, uint16_t protocol) { |
| 940 | ls->tmp_protocol = protocol; |
| 941 | |
| 942 | struct mnl_socket *nl = mnl_socket_open(NETLINK_INET_DIAG); |
| 943 | if (nl == NULL) { |
| 944 | local_sockets_log(ls, "mnl_socket_open() failed"); |
| 945 | return false; |
| 946 | } |
| 947 | |
| 948 | if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) { |
| 949 | local_sockets_log(ls, "mnl_socket_bind() failed"); |
| 950 | mnl_socket_close(nl); |
| 951 | return false; |
| 952 | } |
| 953 | |
| 954 | char buf[MNL_SOCKET_BUFFER_SIZE]; |
| 955 | struct nlmsghdr *nlh = mnl_nlmsg_put_header(buf); |
| 956 | nlh->nlmsg_type = SOCK_DIAG_BY_FAMILY; |
| 957 | nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; |
| 958 | nlh->nlmsg_seq = ls->ns_state.nl_seq ? ls->ns_state.nl_seq++ : (uint32_t)time(NULL); |
| 959 | |
| 960 | struct inet_diag_req_v2 req = { |
| 961 | .sdiag_family = family, |
| 962 | .sdiag_protocol = protocol, |
| 963 | .idiag_states = ~0, // Request all socket states |
| 964 | .idiag_ext = 0, |
| 965 | }; |
| 966 | |
| 967 | if(family == AF_INET6) |
| 968 | req.idiag_ext |= 1 << (INET_DIAG_SKV6ONLY - 1); |
| 969 | |
| 970 | if(protocol == IPPROTO_TCP && ls->config.tcp_info) |
| 971 | req.idiag_ext |= 1 << (INET_DIAG_INFO - 1); |
| 972 | |
| 973 | mnl_nlmsg_put_extra_header(nlh, sizeof(req)); |
| 974 | memcpy(mnl_nlmsg_get_payload(nlh), &req, sizeof(req)); |
| 975 | |
| 976 | ls->stats.mnl_sends++; |
| 977 | if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { |
| 978 | local_sockets_log(ls, "mnl_socket_sendto() failed"); |
| 979 | mnl_socket_close(nl); |
| 980 | return false; |
| 981 | } |
| 982 | |
| 983 | bool rc = true; |
| 984 | size_t received = 0; |
| 985 | ssize_t ret; |
| 986 | while ((ret = mnl_socket_recvfrom(nl, buf, sizeof(buf))) > 0) { |
| 987 | ret = mnl_cb_run(buf, ret, 0, 0, local_sockets_libmnl_cb_data, ls); |
| 988 | if (ret == MNL_CB_ERROR) { |
| 989 | local_sockets_log(ls, "mnl_cb_run() failed"); |
| 990 | rc = false; |
| 991 | break; |
| 992 | } |
| 993 | else if (ret <= MNL_CB_STOP) |
| 994 | break; |
| 995 | |
| 996 | received++; |
| 997 | } |
| 998 | mnl_socket_close(nl); |
| 999 | |
| 1000 | if (ret == -1) { |
| 1001 | local_sockets_log(ls, "mnl_socket_recvfrom() failed"); |
| 1002 | rc = false; |
| 1003 | } |
| 1004 | |
| 1005 | return rc; |
| 1006 | } |
| 1007 | #endif // HAVE_LIBMNL |
| 1008 | |
| 1009 | #if !defined(OS_FREEBSD) // /proc-based socket tables and pcblist reading is Linux-only |
| 1010 | |
| 1011 | static inline bool local_sockets_process_proc_line(LS_STATE *ls, const char *filename, uint16_t family, uint16_t protocol, size_t line, char **words, size_t num_words) { |
| 1012 | // char *sl_txt = get_word(words, num_words, 0); |
| 1013 | char *local_ip_txt = get_word(words, num_words, 1); |
| 1014 | char *local_port_txt = get_word(words, num_words, 2); |
| 1015 | char *remote_ip_txt = get_word(words, num_words, 3); |
| 1016 | char *remote_port_txt = get_word(words, num_words, 4); |
| 1017 | char *state_txt = get_word(words, num_words, 5); |
| 1018 | char *tx_queue_txt = get_word(words, num_words, 6); |
| 1019 | char *rx_queue_txt = get_word(words, num_words, 7); |
| 1020 | char *tr_txt = get_word(words, num_words, 8); |
| 1021 | char *tm_when_txt = get_word(words, num_words, 9); |
| 1022 | char *retrans_txt = get_word(words, num_words, 10); |
| 1023 | char *uid_txt = get_word(words, num_words, 11); |
| 1024 | // char *timeout_txt = get_word(words, num_words, 12); |
| 1025 | char *inode_txt = get_word(words, num_words, 13); |
| 1026 | |
| 1027 | if(!local_ip_txt || !local_port_txt || !remote_ip_txt || !remote_port_txt || !state_txt || |
| 1028 | !tx_queue_txt || !rx_queue_txt || !tr_txt || !tm_when_txt || !retrans_txt || !uid_txt || !inode_txt) { |
| 1029 | local_sockets_log(ls, "cannot parse ipv4 line No %zu of filename '%s'", line, filename); |
| 1030 | return false; |
| 1031 | } |
| 1032 | |
| 1033 | LOCAL_SOCKET n = { |
| 1034 | .direction = SOCKET_DIRECTION_NONE, |
| 1035 | .ipv6ony = { |
| 1036 | .checked = false, |
| 1037 | .ipv46 = false, |
| 1038 | }, |
| 1039 | .local = { |
| 1040 | .family = family, |
| 1041 | .protocol = protocol, |
| 1042 | }, |
| 1043 | .remote = { |
| 1044 | .family = family, |
| 1045 | .protocol = protocol, |
| 1046 | }, |
| 1047 | .uid = UID_UNSET, |
| 1048 | }; |
| 1049 | |
| 1050 | n.local.port = str2uint32_hex(local_port_txt, NULL); |
| 1051 | n.remote.port = str2uint32_hex(remote_port_txt, NULL); |
| 1052 | n.state = str2uint32_hex(state_txt, NULL); |
| 1053 | n.wqueue = str2uint32_hex(tx_queue_txt, NULL); |
| 1054 | n.rqueue = str2uint32_hex(rx_queue_txt, NULL); |
| 1055 | n.timer = str2uint32_hex(tr_txt, NULL); |
| 1056 | n.expires = str2uint32_hex(tm_when_txt, NULL); |
| 1057 | n.retransmits = str2uint32_hex(retrans_txt, NULL); |
| 1058 | n.uid = str2uint32_t(uid_txt, NULL); |
| 1059 | n.inode = str2uint64_t(inode_txt, NULL); |
| 1060 | |
| 1061 | if(family == AF_INET) { |
| 1062 | n.local.ip.ipv4 = str2uint32_hex(local_ip_txt, NULL); |
| 1063 | n.remote.ip.ipv4 = str2uint32_hex(remote_ip_txt, NULL); |
| 1064 | } |
| 1065 | else if(family == AF_INET6) { |
| 1066 | ipv6_to_in6_addr(local_ip_txt, &n.local.ip.ipv6); |
| 1067 | ipv6_to_in6_addr(remote_ip_txt, &n.remote.ip.ipv6); |
| 1068 | } |
| 1069 | |
| 1070 | local_sockets_add_socket(ls, &n); |
| 1071 | return true; |
| 1072 | } |
| 1073 | |
| 1074 | static inline bool local_sockets_read_proc_net_x_getline(LS_STATE *ls, const char *filename, uint16_t family, uint16_t protocol) { |
| 1075 | static bool is_space[256] = { |
| 1076 | [':'] = true, |
| 1077 | [' '] = true, |
| 1078 | }; |
| 1079 | |
| 1080 | if(family != AF_INET && family != AF_INET6) |
| 1081 | return false; |
| 1082 | |
| 1083 | FILE *fp = fopen(filename, "r"); |
| 1084 | if (fp == NULL) |
| 1085 | return false; |
| 1086 | |
| 1087 | char *line = malloc(1024); // no mallocz() here because getline() may resize |
| 1088 | if(!line) { |
| 1089 | fclose(fp); |
| 1090 | return false; |
| 1091 | } |
| 1092 | |
| 1093 | size_t len = 1024; |
| 1094 | ssize_t read; |
| 1095 | |
| 1096 | ssize_t min_line_length = (family == AF_INET) ? 105 : 155; |
| 1097 | size_t counter = 0; |
| 1098 | |
| 1099 | // Read line by line |
| 1100 | while ((read = getline(&line, &len, fp)) != -1) { |
| 1101 | if(counter++ == 0) continue; // skip the first line |
| 1102 | |
| 1103 | if(read < min_line_length) { |
| 1104 | local_sockets_log(ls, "too small line No %zu of filename '%s': %s", counter, filename, line); |
| 1105 | continue; |
| 1106 | } |
| 1107 | |
| 1108 | char *words[32]; |
| 1109 | size_t num_words = quoted_strings_splitter(line, words, 32, is_space); |
| 1110 | local_sockets_process_proc_line(ls, filename, family, protocol, counter, words, num_words); |
| 1111 | } |
| 1112 | |
| 1113 | fclose(fp); |
| 1114 | |
| 1115 | if (line) |
| 1116 | free(line); // no freez() here because getline() may resize |
| 1117 | |
| 1118 | return true; |
| 1119 | } |
| 1120 | |
| 1121 | #define INITIALLY_EXPECTED_PROC_NET_LINES 16384 |
| 1122 | #define PROC_NET_BYTES_PER_LINE 155 // 105 for IPv4, 155 for IPv6 |
| 1123 | #define PROC_NET_WORDS_PER_LINE 22 |
| 1124 | #define INITIALLY_EXPECTED_PROC_NET_WORDS (INITIALLY_EXPECTED_PROC_NET_LINES * PROC_NET_WORDS_PER_LINE) |
| 1125 | #define INITIALLY_EXPECTED_PROC_NET_BYTES (INITIALLY_EXPECTED_PROC_NET_LINES * PROC_NET_BYTES_PER_LINE) |
| 1126 | |
| 1127 | static inline bool local_sockets_read_proc_net_x_procfile(LS_STATE *ls, const char *filename, uint16_t family, uint16_t protocol) { |
| 1128 | if(family != AF_INET && family != AF_INET6) |
| 1129 | return false; |
| 1130 | |
| 1131 | procfile_set_adaptive_allocation(true, INITIALLY_EXPECTED_PROC_NET_BYTES, INITIALLY_EXPECTED_PROC_NET_LINES, INITIALLY_EXPECTED_PROC_NET_WORDS); |
| 1132 | |
| 1133 | bool copy_initial_ff_stats = ls->ff == NULL && ls->stats.ff.memory > 0; |
| 1134 | ls->ff = procfile_reopen(ls->ff, filename, ls->ff ? NULL :" :", PROCFILE_FLAG_DEFAULT); |
| 1135 | |
| 1136 | // we just created ff, copy our old stats to it |
| 1137 | if(ls->ff && copy_initial_ff_stats) ls->ff->stats = ls->stats.ff; |
| 1138 | |
| 1139 | ls->ff = procfile_readall(ls->ff); |
| 1140 | if(!ls->ff) return false; |
| 1141 | |
| 1142 | // get the latest stats from ff; |
| 1143 | ls->stats.ff = ls->ff->stats; |
| 1144 | |
| 1145 | for(size_t l = 1; l < procfile_lines(ls->ff) ;l++) { |
| 1146 | size_t w = procfile_linewords(ls->ff, l); |
| 1147 | if(!w) continue; |
| 1148 | if(w < 14) { |
| 1149 | local_sockets_log(ls, "too small line No %zu of filename '%s' (has %zu words)", l, filename, w); |
| 1150 | continue; |
| 1151 | } |
| 1152 | |
| 1153 | char *words[14] = { 0 }; |
| 1154 | words[0] = procfile_lineword(ls->ff, l, 0); |
| 1155 | words[1] = procfile_lineword(ls->ff, l, 1); |
| 1156 | words[2] = procfile_lineword(ls->ff, l, 2); |
| 1157 | words[3] = procfile_lineword(ls->ff, l, 3); |
| 1158 | words[4] = procfile_lineword(ls->ff, l, 4); |
| 1159 | words[5] = procfile_lineword(ls->ff, l, 5); |
| 1160 | words[6] = procfile_lineword(ls->ff, l, 6); |
| 1161 | words[7] = procfile_lineword(ls->ff, l, 7); |
| 1162 | words[8] = procfile_lineword(ls->ff, l, 8); |
| 1163 | words[9] = procfile_lineword(ls->ff, l, 9); |
| 1164 | words[10] = procfile_lineword(ls->ff, l, 10); |
| 1165 | words[11] = procfile_lineword(ls->ff, l, 11); |
| 1166 | words[12] = procfile_lineword(ls->ff, l, 12); |
| 1167 | words[13] = procfile_lineword(ls->ff, l, 13); |
| 1168 | local_sockets_process_proc_line(ls, filename, family, protocol, l, words, _countof(words)); |
| 1169 | } |
| 1170 | |
| 1171 | return true; |
| 1172 | } |
| 1173 | |
| 1174 | #endif // !OS_FREEBSD |
| 1175 | |
| 1176 | // -------------------------------------------------------------------------------------------------------------------- |
| 1177 | // Generic helpers – compiled on all platforms. |
| 1178 | |
| 1179 | static inline void local_sockets_detect_directions(LS_STATE *ls) { |
| 1180 | for(SIMPLE_HASHTABLE_SLOT_LOCAL_SOCKET *sl = simple_hashtable_first_read_only_LOCAL_SOCKET(&ls->sockets_hashtable); |
| 1181 | sl ; |
| 1182 | sl = simple_hashtable_next_read_only_LOCAL_SOCKET(&ls->sockets_hashtable, sl)) { |
| 1183 | LOCAL_SOCKET *n = SIMPLE_HASHTABLE_SLOT_DATA(sl); |
| 1184 | if (!n) continue; |
| 1185 | |
| 1186 | if ((n->direction & (SOCKET_DIRECTION_INBOUND|SOCKET_DIRECTION_OUTBOUND)) != |
| 1187 | (SOCKET_DIRECTION_INBOUND|SOCKET_DIRECTION_OUTBOUND)) |
| 1188 | continue; |
| 1189 | |
| 1190 | // check if the local port is one of our listening ports |
| 1191 | { |
| 1192 | SIMPLE_HASHTABLE_SLOT_LISTENING_PORT *sl_port = |
| 1193 | simple_hashtable_get_slot_LISTENING_PORT(&ls->listening_ports_hashtable, n->local_port_hash, &n->local_port_key, false); |
| 1194 | |
| 1195 | struct local_port *port = SIMPLE_HASHTABLE_SLOT_DATA(sl_port); // do not reference this pointer - is invalid |
| 1196 | if(port) { |
| 1197 | // the local port of this socket is a port we listen to |
| 1198 | n->direction &= ~SOCKET_DIRECTION_OUTBOUND; |
| 1199 | } |
| 1200 | else |
| 1201 | n->direction &= ~SOCKET_DIRECTION_INBOUND; |
| 1202 | } |
| 1203 | |
| 1204 | // check if the remote IP is one of our local IPs |
| 1205 | { |
| 1206 | SIMPLE_HASHTABLE_SLOT_LOCAL_IP *sl_ip = |
| 1207 | simple_hashtable_get_slot_LOCAL_IP(&ls->local_ips_hashtable, n->remote_ip_hash, &n->remote.ip, false); |
| 1208 | |
| 1209 | union ipv46 *d = SIMPLE_HASHTABLE_SLOT_DATA(sl_ip); |
| 1210 | if (d) { |
| 1211 | // the remote IP of this socket is one of our local IPs |
| 1212 | if(n->direction & SOCKET_DIRECTION_INBOUND) { |
| 1213 | n->direction &= ~SOCKET_DIRECTION_INBOUND; |
| 1214 | n->direction |= SOCKET_DIRECTION_LOCAL_INBOUND; |
| 1215 | } |
| 1216 | else if(n->direction & SOCKET_DIRECTION_OUTBOUND) { |
| 1217 | n->direction &= ~SOCKET_DIRECTION_OUTBOUND; |
| 1218 | n->direction |= SOCKET_DIRECTION_LOCAL_OUTBOUND; |
| 1219 | } |
| 1220 | continue; |
| 1221 | } |
| 1222 | } |
| 1223 | |
| 1224 | if (local_sockets_is_loopback_address(&n->local) || |
| 1225 | local_sockets_is_loopback_address(&n->remote)) { |
| 1226 | // both IP addresses are loopback |
| 1227 | if(n->direction & SOCKET_DIRECTION_INBOUND) { |
| 1228 | n->direction &= ~SOCKET_DIRECTION_INBOUND; |
| 1229 | n->direction |= SOCKET_DIRECTION_LOCAL_INBOUND; |
| 1230 | } |
| 1231 | else if(n->direction & SOCKET_DIRECTION_OUTBOUND) { |
| 1232 | n->direction &= ~SOCKET_DIRECTION_OUTBOUND; |
| 1233 | n->direction |= SOCKET_DIRECTION_LOCAL_OUTBOUND; |
| 1234 | } |
| 1235 | } |
| 1236 | } |
| 1237 | } |
| 1238 | |
| 1239 | // -------------------------------------------------------------------------------------------------------------------- |
| 1240 | |
| 1241 | static inline void local_sockets_init(LS_STATE *ls) { |
| 1242 | ls->config.host_prefix = netdata_configured_host_prefix; |
| 1243 | |
| 1244 | spinlock_init(&ls->spinlock); |
| 1245 | |
| 1246 | simple_hashtable_init_NET_NS(&ls->ns_hashtable, 1024); |
| 1247 | simple_hashtable_init_PID_SOCKET(&ls->pid_sockets_hashtable, 65535); |
| 1248 | simple_hashtable_init_LOCAL_SOCKET(&ls->sockets_hashtable, 65535); |
| 1249 | simple_hashtable_init_LOCAL_IP(&ls->local_ips_hashtable, 4096); |
| 1250 | simple_hashtable_init_LISTENING_PORT(&ls->listening_ports_hashtable, 4096); |
| 1251 | |
| 1252 | ls->local_socket_aral = aral_create( |
| 1253 | "local-sockets", |
| 1254 | sizeof(LOCAL_SOCKET), |
| 1255 | 65536 / sizeof(LOCAL_SOCKET), |
| 1256 | 65536, |
| 1257 | NULL, NULL, NULL, false, true, true); |
| 1258 | |
| 1259 | ls->pid_socket_aral = aral_create( |
| 1260 | "pid-sockets", |
| 1261 | sizeof(struct pid_socket), |
| 1262 | 65536 / sizeof(struct pid_socket), |
| 1263 | 65536, |
| 1264 | NULL, NULL, NULL, false, true, true); |
| 1265 | |
| 1266 | memset(&ls->stats, 0, sizeof(ls->stats)); |
| 1267 | |
| 1268 | #if defined(HAVE_LIBMNL) |
| 1269 | ls->tmp_protocol = 0; |
| 1270 | #endif |
| 1271 | |
| 1272 | #if defined(LOCAL_SOCKETS_USE_SETNS) |
| 1273 | if(ls->config.namespaces && ls->spawn_server == NULL) { |
| 1274 | ls->spawn_server = spawn_server_create(SPAWN_SERVER_OPTION_CALLBACK, NULL, local_sockets_spawn_server_callback, 0, NULL); |
| 1275 | ls->spawn_server_is_mine = true; |
| 1276 | } |
| 1277 | else |
| 1278 | ls->spawn_server_is_mine = false; |
| 1279 | #endif |
| 1280 | } |
| 1281 | |
| 1282 | static inline void local_sockets_cleanup(LS_STATE *ls) { |
| 1283 | if(ls->ff) { |
| 1284 | ls->stats.ff = ls->ff->stats; |
| 1285 | procfile_close(ls->ff); |
| 1286 | ls->ff = NULL; |
| 1287 | } |
| 1288 | |
| 1289 | #if defined(LOCAL_SOCKETS_USE_SETNS) |
| 1290 | if(ls->spawn_server_is_mine) { |
| 1291 | spawn_server_destroy(ls->spawn_server); |
| 1292 | ls->spawn_server = NULL; |
| 1293 | ls->spawn_server_is_mine = false; |
| 1294 | } |
| 1295 | #endif |
| 1296 | |
| 1297 | // free the sockets hashtable data |
| 1298 | for(SIMPLE_HASHTABLE_SLOT_LOCAL_SOCKET *sl = simple_hashtable_first_read_only_LOCAL_SOCKET(&ls->sockets_hashtable); |
| 1299 | sl; |
| 1300 | sl = simple_hashtable_next_read_only_LOCAL_SOCKET(&ls->sockets_hashtable, sl)) { |
| 1301 | LOCAL_SOCKET *n = SIMPLE_HASHTABLE_SLOT_DATA(sl); |
| 1302 | if(!n) continue; |
| 1303 | |
| 1304 | string_freez(n->cmdline); |
| 1305 | aral_freez(ls->local_socket_aral, n); |
| 1306 | } |
| 1307 | |
| 1308 | // free the pid_socket hashtable data |
| 1309 | for(SIMPLE_HASHTABLE_SLOT_PID_SOCKET *sl = simple_hashtable_first_read_only_PID_SOCKET(&ls->pid_sockets_hashtable); |
| 1310 | sl; |
| 1311 | sl = simple_hashtable_next_read_only_PID_SOCKET(&ls->pid_sockets_hashtable, sl)) { |
| 1312 | struct pid_socket *ps = SIMPLE_HASHTABLE_SLOT_DATA(sl); |
| 1313 | if(!ps) continue; |
| 1314 | |
| 1315 | freez(ps->cmdline); |
| 1316 | aral_freez(ls->pid_socket_aral, ps); |
| 1317 | } |
| 1318 | |
| 1319 | // free the hashtable |
| 1320 | simple_hashtable_destroy_NET_NS(&ls->ns_hashtable); |
| 1321 | simple_hashtable_destroy_PID_SOCKET(&ls->pid_sockets_hashtable); |
| 1322 | simple_hashtable_destroy_LISTENING_PORT(&ls->listening_ports_hashtable); |
| 1323 | simple_hashtable_destroy_LOCAL_IP(&ls->local_ips_hashtable); |
| 1324 | simple_hashtable_destroy_LOCAL_SOCKET(&ls->sockets_hashtable); |
| 1325 | |
| 1326 | aral_destroy(ls->local_socket_aral); |
| 1327 | aral_destroy(ls->pid_socket_aral); |
| 1328 | } |
| 1329 | |
| 1330 | // -------------------------------------------------------------------------------------------------------------------- |
| 1331 | |
| 1332 | static inline void local_sockets_track_time(LS_STATE *ls, const char *name) { |
| 1333 | if(!ls->config.report || ls->timings_idx >= _countof(ls->timings)) |
| 1334 | return; |
| 1335 | |
| 1336 | usec_t now_ut = now_monotonic_usec(); |
| 1337 | |
| 1338 | if(ls->timings_idx == 0 && !ls->timings[0].start_ut) { |
| 1339 | ls->timings[0].start_ut = now_ut; |
| 1340 | ls->timings[0].name = name; |
| 1341 | } |
| 1342 | else if(ls->timings_idx + 1 < _countof(ls->timings)) { |
| 1343 | ls->timings[ls->timings_idx].end_ut = now_ut; |
| 1344 | ls->timings_idx++; |
| 1345 | ls->timings[ls->timings_idx].start_ut = now_ut; |
| 1346 | ls->timings[ls->timings_idx].name = name; |
| 1347 | } |
| 1348 | else if(ls->timings_idx + 1 == _countof(ls->timings)) { |
| 1349 | ls->timings[ls->timings_idx].end_ut = now_ut; |
| 1350 | ls->timings_idx++; // out of bounds |
| 1351 | } |
| 1352 | } |
| 1353 | |
| 1354 | static void local_sockets_track_time_by_protocol(LS_STATE *ls, bool mnl, uint16_t family, uint16_t protocol) { |
| 1355 | if(mnl) { |
| 1356 | if(family == AF_INET) { |
| 1357 | if(protocol == IPPROTO_TCP) |
| 1358 | local_sockets_track_time(ls, "mnl_read_tcp4"); |
| 1359 | else if(protocol == IPPROTO_UDP) |
| 1360 | local_sockets_track_time(ls, "mnl_read_udp4"); |
| 1361 | } |
| 1362 | else if(family == AF_INET6) { |
| 1363 | if(protocol == IPPROTO_TCP) |
| 1364 | local_sockets_track_time(ls, "mnl_read_tcp6"); |
| 1365 | else if(protocol == IPPROTO_UDP) |
| 1366 | local_sockets_track_time(ls, "mnl_read_udp6"); |
| 1367 | } |
| 1368 | else |
| 1369 | local_sockets_track_time(ls, "mnl_read_unknown"); |
| 1370 | } |
| 1371 | else { |
| 1372 | if(family == AF_INET) { |
| 1373 | if(protocol == IPPROTO_TCP) |
| 1374 | local_sockets_track_time(ls, "proc_read_tcp4"); |
| 1375 | else if(protocol == IPPROTO_UDP) |
| 1376 | local_sockets_track_time(ls, "proc_read_udp4"); |
| 1377 | } |
| 1378 | else if(family == AF_INET6) { |
| 1379 | if(protocol == IPPROTO_TCP) |
| 1380 | local_sockets_track_time(ls, "proc_read_tcp6"); |
| 1381 | else if(protocol == IPPROTO_UDP) |
| 1382 | local_sockets_track_time(ls, "proc_read_udp6"); |
| 1383 | } |
| 1384 | else |
| 1385 | local_sockets_track_time(ls, "proc_read_unknown"); |
| 1386 | } |
| 1387 | } |
| 1388 | |
| 1389 | #if !defined(OS_FREEBSD) // /proc-based socket reading is Linux-only |
| 1390 | |
| 1391 | static inline void local_sockets_do_family_protocol(LS_STATE *ls, const char *filename, uint16_t family, uint16_t protocol) { |
| 1392 | #if defined(HAVE_LIBMNL) |
| 1393 | if(!ls->config.no_mnl) { |
| 1394 | local_sockets_track_time_by_protocol(ls, true, family, protocol); |
| 1395 | if(local_sockets_libmnl_get_sockets(ls, family, protocol)) |
| 1396 | return; |
| 1397 | |
| 1398 | // else, do proc |
| 1399 | } |
| 1400 | #endif |
| 1401 | |
| 1402 | local_sockets_track_time_by_protocol(ls, false, family, protocol); |
| 1403 | |
| 1404 | if(ls->config.procfile) |
| 1405 | local_sockets_read_proc_net_x_procfile(ls, filename, family, protocol); |
| 1406 | else |
| 1407 | local_sockets_read_proc_net_x_getline(ls, filename, family, protocol); |
| 1408 | } |
| 1409 | |
| 1410 | static inline void local_sockets_read_all_system_sockets(LS_STATE *ls) { |
| 1411 | char path[FILENAME_MAX + 1]; |
| 1412 | |
| 1413 | if(ls->config.namespaces) { |
| 1414 | local_sockets_track_time(ls, "read_namespaces"); |
| 1415 | snprintfz(path, sizeof(path), "%s/proc/self/ns/net", ls->config.host_prefix); |
| 1416 | local_sockets_read_proc_inode_link(ls, path, &ls->proc_self_net_ns_inode, "net"); |
| 1417 | } |
| 1418 | |
| 1419 | if(ls->config.cmdline || ls->config.comm || ls->config.pid || ls->config.namespaces) { |
| 1420 | local_sockets_track_time(ls, "proc_read_pids"); |
| 1421 | snprintfz(path, sizeof(path), "%s/proc", ls->config.host_prefix); |
| 1422 | local_sockets_find_all_sockets_in_proc(ls, path); |
| 1423 | } |
| 1424 | |
| 1425 | if(ls->config.tcp4) { |
| 1426 | snprintfz(path, sizeof(path), "%s/proc/net/tcp", ls->config.host_prefix); |
| 1427 | local_sockets_do_family_protocol(ls, path, AF_INET, IPPROTO_TCP); |
| 1428 | } |
| 1429 | |
| 1430 | if(ls->config.udp4) { |
| 1431 | snprintfz(path, sizeof(path), "%s/proc/net/udp", ls->config.host_prefix); |
| 1432 | local_sockets_do_family_protocol(ls, path, AF_INET, IPPROTO_UDP); |
| 1433 | } |
| 1434 | |
| 1435 | if(ls->config.tcp6) { |
| 1436 | snprintfz(path, sizeof(path), "%s/proc/net/tcp6", ls->config.host_prefix); |
| 1437 | local_sockets_do_family_protocol(ls, path, AF_INET6, IPPROTO_TCP); |
| 1438 | } |
| 1439 | |
| 1440 | if(ls->config.udp6) { |
| 1441 | snprintfz(path, sizeof(path), "%s/proc/net/udp6", ls->config.host_prefix); |
| 1442 | local_sockets_do_family_protocol(ls, path, AF_INET6, IPPROTO_UDP); |
| 1443 | } |
| 1444 | } |
| 1445 | |
| 1446 | #elif defined(OS_FREEBSD) |
| 1447 | // FreeBSD: local_sockets_read_all_system_sockets() is provided by the FreeBSD backend. |
| 1448 | #include "local-sockets-freebsd.h" |
| 1449 | #endif // !OS_FREEBSD |
| 1450 | |
| 1451 | // -------------------------------------------------------------------------------------------------------------------- |
| 1452 | // switch namespaces to read namespace sockets (Linux/setns only) |
| 1453 | |
| 1454 | #if defined(LOCAL_SOCKETS_USE_SETNS) |
| 1455 | |
| 1456 | struct local_sockets_child_work { |
| 1457 | int fd; |
| 1458 | uint64_t net_ns_inode; |
| 1459 | }; |
| 1460 | |
| 1461 | #define LOCAL_SOCKET_TERMINATOR (struct local_socket) { \ |
| 1462 | .expires = UINT32_MAX, \ |
| 1463 | .timer = UINT8_MAX, \ |
| 1464 | .inode = UINT64_MAX, \ |
| 1465 | .net_ns_inode = UINT64_MAX, \ |
| 1466 | } |
| 1467 | |
| 1468 | static inline bool local_socket_is_terminator(const struct local_socket *n) { |
| 1469 | static const struct local_socket t = LOCAL_SOCKET_TERMINATOR; |
| 1470 | return (n->expires == t.expires && |
| 1471 | n->timer == t.timer && |
| 1472 | n->inode == t.inode && |
| 1473 | n->net_ns_inode == t.net_ns_inode); |
| 1474 | } |
| 1475 | |
| 1476 | static inline void local_sockets_send_to_parent(struct local_socket_state *ls, const struct local_socket *n, void *data) { |
| 1477 | struct local_sockets_child_work *cw = data; |
| 1478 | int fd = cw->fd; |
| 1479 | |
| 1480 | if(!local_socket_is_terminator(n)) { |
| 1481 | ls->stats.errors_encountered = 0; |
| 1482 | // local_sockets_log( |
| 1483 | // ls, |
| 1484 | // "child is sending inode %"PRIu64" of namespace %"PRIu64", from namespace %"PRIu64" for pid %d", |
| 1485 | // n->inode, n->net_ns_inode, ls->proc_self_net_ns_inode, ls->ns_state.net_ns_pid); |
| 1486 | } |
| 1487 | |
| 1488 | if(write(fd, n, sizeof(*n)) != sizeof(*n)) |
| 1489 | local_sockets_log(ls, "failed to write local socket to pipe"); |
| 1490 | |
| 1491 | size_t len = n->cmdline ? string_strlen(n->cmdline) + 1 : 0; |
| 1492 | if(write(fd, &len, sizeof(len)) != sizeof(len)) |
| 1493 | local_sockets_log(ls, "failed to write cmdline length to pipe"); |
| 1494 | |
| 1495 | if(len) |
| 1496 | if(write(fd, string2str(n->cmdline), len) != (ssize_t)len) |
| 1497 | local_sockets_log(ls, "failed to write cmdline to pipe"); |
| 1498 | } |
| 1499 | |
| 1500 | static inline int local_sockets_spawn_server_callback(SPAWN_REQUEST *request) { |
| 1501 | static const struct local_socket terminator = LOCAL_SOCKET_TERMINATOR; |
| 1502 | |
| 1503 | struct local_sockets_ns_req *req = (struct local_sockets_ns_req *)request->data; |
| 1504 | |
| 1505 | LS_STATE ls = { 0 }; |
| 1506 | ls.config = req->config; |
| 1507 | ls.ns_state = req->ns_state; |
| 1508 | ls.ns_state.nl_seq += gettid_uncached() * 10; |
| 1509 | |
| 1510 | // we don't need these inside namespaces |
| 1511 | ls.config.cmdline = false; |
| 1512 | ls.config.comm = false; |
| 1513 | ls.config.pid = false; |
| 1514 | ls.config.namespaces = false; |
| 1515 | |
| 1516 | #if !defined(USE_LIBMNL_AFTER_SETNS) |
| 1517 | ls.config.no_mnl = true; // disable mnl since this collects all sockets from the entire system |
| 1518 | #endif |
| 1519 | |
| 1520 | // initialize local sockets |
| 1521 | local_sockets_init(&ls); |
| 1522 | ls.proc_self_net_ns_inode = ls.ns_state.net_ns_inode; |
| 1523 | ls.config.host_prefix = ""; // we need the /proc of the container |
| 1524 | |
| 1525 | struct local_sockets_child_work cw = { |
| 1526 | .net_ns_inode = ls.proc_self_net_ns_inode, |
| 1527 | .fd = request->fds[1], // stdout |
| 1528 | }; |
| 1529 | |
| 1530 | ls.config.cb = local_sockets_send_to_parent; |
| 1531 | ls.config.data = &cw; |
| 1532 | |
| 1533 | // switch namespace using the custom fd passed via the spawn server |
| 1534 | if (setns(request->fds[3], CLONE_NEWNET) == -1) { |
| 1535 | local_sockets_log(&ls, "failed to switch network namespace at child process using fd %d", request->fds[3]); |
| 1536 | return EXIT_FAILURE; |
| 1537 | } |
| 1538 | |
| 1539 | // close the custom fd |
| 1540 | close(request->fds[3]); request->fds[3] = -1; |
| 1541 | |
| 1542 | // read all sockets from /proc |
| 1543 | local_sockets_read_all_system_sockets(&ls); |
| 1544 | |
| 1545 | // send all sockets to parent |
| 1546 | local_sockets_foreach_local_socket_call_cb(&ls); |
| 1547 | |
| 1548 | // send the terminating socket |
| 1549 | local_sockets_send_to_parent(&ls, &terminator, &cw); |
| 1550 | |
| 1551 | local_sockets_cleanup(&ls); |
| 1552 | |
| 1553 | return EXIT_SUCCESS; |
| 1554 | } |
| 1555 | |
| 1556 | static inline bool local_sockets_get_namespace_sockets_with_pid(LS_STATE *ls, struct pid_socket *ps) { |
| 1557 | char filename[1024]; |
| 1558 | snprintfz(filename, sizeof(filename), "%s/proc/%d/ns/net", ls->config.host_prefix, ps->pid); |
| 1559 | |
| 1560 | // verify the pid is in the target namespace |
| 1561 | int fd = open(filename, O_RDONLY | O_CLOEXEC); |
| 1562 | if (fd == -1) { |
| 1563 | local_sockets_log(ls, "cannot open file '%s'", filename); |
| 1564 | if(ls->config.report) |
| 1565 | __atomic_add_fetch(&ls->stats.namespaces_absent, 1, __ATOMIC_RELAXED); |
| 1566 | return false; |
| 1567 | } |
| 1568 | |
| 1569 | struct stat statbuf; |
| 1570 | if (fstat(fd, &statbuf) == -1) { |
| 1571 | close(fd); |
| 1572 | local_sockets_log(ls, "failed to get file statistics for '%s'", filename); |
| 1573 | if(ls->config.report) |
| 1574 | __atomic_add_fetch(&ls->stats.namespaces_absent, 1, __ATOMIC_RELAXED); |
| 1575 | return false; |
| 1576 | } |
| 1577 | |
| 1578 | if (statbuf.st_ino != ps->net_ns_inode) { |
| 1579 | close(fd); |
| 1580 | local_sockets_log(ls, "pid %d is not in the wanted network namespace", ps->pid); |
| 1581 | if(ls->config.report) |
| 1582 | __atomic_add_fetch(&ls->stats.namespaces_invalid, 1, __ATOMIC_RELAXED); |
| 1583 | return false; |
| 1584 | } |
| 1585 | |
| 1586 | if(ls->spawn_server == NULL) { |
| 1587 | close(fd); |
| 1588 | local_sockets_log(ls, "spawn server is not available"); |
| 1589 | if(ls->config.report) |
| 1590 | __atomic_add_fetch(&ls->stats.namespaces_forks_failed, 1, __ATOMIC_RELAXED); |
| 1591 | return false; |
| 1592 | } |
| 1593 | |
| 1594 | struct local_sockets_ns_req req = { |
| 1595 | .config = ls->config, |
| 1596 | .ns_state = ls->ns_state, |
| 1597 | }; |
| 1598 | req.ns_state.net_ns_pid = ps->pid; |
| 1599 | req.ns_state.net_ns_inode = ps->net_ns_inode; |
| 1600 | |
| 1601 | SPAWN_INSTANCE *si = spawn_server_exec(ls->spawn_server, STDERR_FILENO, fd, NULL, &req, sizeof(req), SPAWN_INSTANCE_TYPE_CALLBACK); |
| 1602 | close(fd); fd = -1; |
| 1603 | |
| 1604 | if(ls->config.report) |
| 1605 | __atomic_add_fetch(&ls->stats.namespaces_forks_attempted, 1, __ATOMIC_RELAXED); |
| 1606 | |
| 1607 | if(si == NULL) { |
| 1608 | local_sockets_log(ls, "cannot create spawn instance"); |
| 1609 | |
| 1610 | if(ls->config.report) |
| 1611 | __atomic_add_fetch(&ls->stats.namespaces_forks_failed, 1, __ATOMIC_RELAXED); |
| 1612 | |
| 1613 | return false; |
| 1614 | } |
| 1615 | |
| 1616 | size_t received = 0; |
| 1617 | struct local_socket buf; |
| 1618 | while(read(spawn_server_instance_read_fd(si), &buf, sizeof(buf)) == sizeof(buf)) { |
| 1619 | size_t len = 0; |
| 1620 | if(read(spawn_server_instance_read_fd(si), &len, sizeof(len)) != sizeof(len)) |
| 1621 | local_sockets_log(ls, "failed to read cmdline length from pipe"); |
| 1622 | |
| 1623 | if(len > LOCAL_SOCKETS_CMDLINE_MAX) { |
| 1624 | // broken pipe protocol: writer caps at LOCAL_SOCKETS_CMDLINE_MAX bytes |
| 1625 | local_sockets_log(ls, "cmdline length %zu from child exceeds limit (%d), aborting namespace socket collection", len, LOCAL_SOCKETS_CMDLINE_MAX); |
| 1626 | break; |
| 1627 | } |
| 1628 | |
| 1629 | if(len) { |
| 1630 | CLEAN_CHAR_P *cmdline = mallocz(len + 1); |
| 1631 | if(read(spawn_server_instance_read_fd(si), cmdline, len) != (ssize_t)len) |
| 1632 | local_sockets_log(ls, "failed to read cmdline from pipe"); |
| 1633 | else { |
| 1634 | cmdline[len] = '\0'; |
| 1635 | buf.cmdline = string_strdupz(cmdline); |
| 1636 | } |
| 1637 | } |
| 1638 | else |
| 1639 | buf.cmdline = NULL; |
| 1640 | |
| 1641 | received++; |
| 1642 | |
| 1643 | if(local_socket_is_terminator(&buf)) |
| 1644 | // the child finished |
| 1645 | break; |
| 1646 | |
| 1647 | // overwrite the net_ns_inode we receive |
| 1648 | buf.net_ns_inode = ps->net_ns_inode; |
| 1649 | |
| 1650 | spinlock_lock(&ls->spinlock); |
| 1651 | |
| 1652 | if(!local_sockets_add_socket(ls, &buf)) { |
| 1653 | // fprintf(stderr, "Failed to add duplicate namespace socket inode %"PRIu64"\n", buf.inode); |
| 1654 | string_freez(buf.cmdline); |
| 1655 | if(ls->config.report) |
| 1656 | __atomic_add_fetch(&ls->stats.namespaces_sockets_existing, 1, __ATOMIC_RELAXED); |
| 1657 | } |
| 1658 | else { |
| 1659 | // fprintf(stderr, "Added namespace socket inode %"PRIu64"\n", buf.inode); |
| 1660 | if(ls->config.report) |
| 1661 | __atomic_add_fetch(&ls->stats.namespaces_sockets_new, 1, __ATOMIC_RELAXED); |
| 1662 | } |
| 1663 | |
| 1664 | spinlock_unlock(&ls->spinlock); |
| 1665 | } |
| 1666 | |
| 1667 | spawn_server_exec_kill(ls->spawn_server, si, 0); |
| 1668 | |
| 1669 | if(ls->config.report && received == 0) |
| 1670 | __atomic_add_fetch(&ls->stats.namespaces_forks_unresponsive, 1, __ATOMIC_RELAXED); |
| 1671 | |
| 1672 | return received > 0; |
| 1673 | } |
| 1674 | |
| 1675 | struct local_sockets_namespace_worker { |
| 1676 | LS_STATE *ls; |
| 1677 | uint64_t inode; |
| 1678 | }; |
| 1679 | |
| 1680 | static inline void local_sockets_get_namespace_sockets_worker(void *arg) { |
| 1681 | struct local_sockets_namespace_worker *data = arg; |
| 1682 | LS_STATE *ls = data->ls; |
| 1683 | const uint64_t inode = data->inode; |
| 1684 | |
| 1685 | spinlock_lock(&ls->spinlock); |
| 1686 | |
| 1687 | // find a pid_socket that has this namespace |
| 1688 | for(SIMPLE_HASHTABLE_SLOT_PID_SOCKET *sl_pid = simple_hashtable_first_read_only_PID_SOCKET(&ls->pid_sockets_hashtable) ; |
| 1689 | sl_pid ; |
| 1690 | sl_pid = simple_hashtable_next_read_only_PID_SOCKET(&ls->pid_sockets_hashtable, sl_pid)) { |
| 1691 | struct pid_socket *ps = SIMPLE_HASHTABLE_SLOT_DATA(sl_pid); |
| 1692 | if(!ps || ps->net_ns_inode != inode) continue; |
| 1693 | |
| 1694 | // now we have a pid that has the same namespace inode |
| 1695 | |
| 1696 | spinlock_unlock(&ls->spinlock); |
| 1697 | const bool worked = local_sockets_get_namespace_sockets_with_pid(ls, ps); |
| 1698 | spinlock_lock(&ls->spinlock); |
| 1699 | |
| 1700 | if(worked) |
| 1701 | break; |
| 1702 | } |
| 1703 | |
| 1704 | spinlock_unlock(&ls->spinlock); |
| 1705 | } |
| 1706 | |
| 1707 | static inline void local_sockets_namespaces(LS_STATE *ls) { |
| 1708 | size_t threads = ls->config.max_concurrent_namespaces; |
| 1709 | if(threads == 0) threads = 5; |
| 1710 | if(threads > 100) threads = 100; |
| 1711 | |
| 1712 | size_t last_thread = 0; |
| 1713 | ND_THREAD **workers = callocz(threads, sizeof(*workers)); |
| 1714 | struct local_sockets_namespace_worker *workers_data = callocz(threads, sizeof(*workers_data)); |
| 1715 | |
| 1716 | spinlock_lock(&ls->spinlock); |
| 1717 | |
| 1718 | for(SIMPLE_HASHTABLE_SLOT_NET_NS *sl = simple_hashtable_first_read_only_NET_NS(&ls->ns_hashtable); |
| 1719 | sl; |
| 1720 | sl = simple_hashtable_next_read_only_NET_NS(&ls->ns_hashtable, sl)) { |
| 1721 | const uint64_t inode = (uint64_t)SIMPLE_HASHTABLE_SLOT_DATA(sl); |
| 1722 | |
| 1723 | if(inode == ls->proc_self_net_ns_inode) |
| 1724 | // skip our own namespace, we already have them |
| 1725 | continue; |
| 1726 | |
| 1727 | spinlock_unlock(&ls->spinlock); |
| 1728 | |
| 1729 | ls->stats.namespaces_found++; |
| 1730 | |
| 1731 | if(workers[last_thread] != NULL) { |
| 1732 | if(++last_thread >= threads) |
| 1733 | last_thread = 0; |
| 1734 | |
| 1735 | if(workers[last_thread]) { |
| 1736 | nd_thread_join(workers[last_thread]); |
| 1737 | workers[last_thread] = NULL; |
| 1738 | } |
| 1739 | } |
| 1740 | |
| 1741 | workers_data[last_thread].ls = ls; |
| 1742 | workers_data[last_thread].inode = inode; |
| 1743 | workers[last_thread] = nd_thread_create( |
| 1744 | "local-sockets-worker", |
| 1745 | NETDATA_THREAD_OPTION_DEFAULT, |
| 1746 | local_sockets_get_namespace_sockets_worker, |
| 1747 | &workers_data[last_thread]); |
| 1748 | |
| 1749 | spinlock_lock(&ls->spinlock); |
| 1750 | } |
| 1751 | |
| 1752 | spinlock_unlock(&ls->spinlock); |
| 1753 | |
| 1754 | // wait all the threads running |
| 1755 | for(size_t i = 0; i < threads ;i++) { |
| 1756 | if(workers[i]) |
| 1757 | nd_thread_join(workers[i]); |
| 1758 | } |
| 1759 | |
| 1760 | freez(workers_data); |
| 1761 | freez(workers); |
| 1762 | } |
| 1763 | |
| 1764 | #endif // LOCAL_SOCKETS_USE_SETNS |
| 1765 | |
| 1766 | // -------------------------------------------------------------------------------------------------------------------- |
| 1767 | // read namespace sockets from the host's /proc (Linux without setns only) |
| 1768 | |
| 1769 | #if !defined(LOCAL_SOCKETS_USE_SETNS) && !defined(OS_FREEBSD) |
| 1770 | |
| 1771 | static inline bool local_sockets_namespaces_from_proc_with_pid(LS_STATE *ls, struct pid_socket *ps) { |
| 1772 | char filename[1024]; |
| 1773 | snprintfz(filename, sizeof(filename), "%s/proc/%d/ns/net", ls->config.host_prefix, ps->pid); |
| 1774 | |
| 1775 | // verify the pid is in the target namespace |
| 1776 | int fd = open(filename, O_RDONLY | O_CLOEXEC); |
| 1777 | if (fd == -1) { |
| 1778 | local_sockets_log(ls, "cannot open file '%s'", filename); |
| 1779 | if(ls->config.report) |
| 1780 | __atomic_add_fetch(&ls->stats.namespaces_absent, 1, __ATOMIC_RELAXED); |
| 1781 | return false; |
| 1782 | } |
| 1783 | |
| 1784 | struct stat statbuf; |
| 1785 | if (fstat(fd, &statbuf) == -1) { |
| 1786 | close(fd); |
| 1787 | local_sockets_log(ls, "failed to get file statistics for '%s'", filename); |
| 1788 | if(ls->config.report) |
| 1789 | __atomic_add_fetch(&ls->stats.namespaces_absent, 1, __ATOMIC_RELAXED); |
| 1790 | return false; |
| 1791 | } |
| 1792 | |
| 1793 | if (statbuf.st_ino != ps->net_ns_inode) { |
| 1794 | close(fd); |
| 1795 | local_sockets_log(ls, "pid %d is not in the wanted network namespace", ps->pid); |
| 1796 | if(ls->config.report) |
| 1797 | __atomic_add_fetch(&ls->stats.namespaces_invalid, 1, __ATOMIC_RELAXED); |
| 1798 | return false; |
| 1799 | } |
| 1800 | |
| 1801 | char path[FILENAME_MAX + 1]; |
| 1802 | |
| 1803 | if(ls->config.tcp4) { |
| 1804 | snprintfz(path, sizeof(path), "%s/proc/%d/net/tcp", ls->config.host_prefix, ps->pid); |
| 1805 | if(!local_sockets_read_proc_net_x(ls, path, AF_INET, IPPROTO_TCP)) |
| 1806 | return false; |
| 1807 | } |
| 1808 | |
| 1809 | if(ls->config.udp4) { |
| 1810 | snprintfz(path, sizeof(path), "%s/proc/%d/net/udp", ls->config.host_prefix, ps->pid); |
| 1811 | if(!local_sockets_read_proc_net_x(ls, path, AF_INET, IPPROTO_UDP)) |
| 1812 | return false; |
| 1813 | } |
| 1814 | |
| 1815 | if(ls->config.tcp6) { |
| 1816 | snprintfz(path, sizeof(path), "%s/proc/%d/net/tcp6", ls->config.host_prefix, ps->pid); |
| 1817 | if(!local_sockets_read_proc_net_x(ls, path, AF_INET6, IPPROTO_TCP)) |
| 1818 | return false; |
| 1819 | } |
| 1820 | |
| 1821 | if(ls->config.udp6) { |
| 1822 | snprintfz(path, sizeof(path), "%s/proc/%d/net/udp6", ls->config.host_prefix, ps->pid); |
| 1823 | if(!local_sockets_read_proc_net_x(ls, path, AF_INET6, IPPROTO_UDP)) |
| 1824 | return false; |
| 1825 | } |
| 1826 | |
| 1827 | return true; |
| 1828 | } |
| 1829 | |
| 1830 | static inline void local_sockets_namespaces_from_proc(LS_STATE *ls) { |
| 1831 | for(SIMPLE_HASHTABLE_SLOT_NET_NS *sl = simple_hashtable_first_read_only_NET_NS(&ls->ns_hashtable); |
| 1832 | sl; |
| 1833 | sl = simple_hashtable_next_read_only_NET_NS(&ls->ns_hashtable, sl)) { |
| 1834 | const uint64_t inode = (uint64_t)SIMPLE_HASHTABLE_SLOT_DATA(sl); |
| 1835 | |
| 1836 | if (inode == ls->proc_self_net_ns_inode) |
| 1837 | // skip our own namespace, we already have them |
| 1838 | continue; |
| 1839 | |
| 1840 | ls->stats.namespaces_found++; |
| 1841 | |
| 1842 | for(SIMPLE_HASHTABLE_SLOT_PID_SOCKET *sl_pid = simple_hashtable_first_read_only_PID_SOCKET(&ls->pid_sockets_hashtable) ; |
| 1843 | sl_pid ; |
| 1844 | sl_pid = simple_hashtable_next_read_only_PID_SOCKET(&ls->pid_sockets_hashtable, sl_pid)) { |
| 1845 | struct pid_socket *ps = SIMPLE_HASHTABLE_SLOT_DATA(sl_pid); |
| 1846 | if(!ps || ps->net_ns_inode != inode) continue; |
| 1847 | |
| 1848 | // now we have a pid that has the same namespace inode |
| 1849 | |
| 1850 | if(local_sockets_namespaces_from_proc_with_pid(ls, ps)) |
| 1851 | break; |
| 1852 | } |
| 1853 | } |
| 1854 | } |
| 1855 | |
| 1856 | #endif |
| 1857 | |
| 1858 | // -------------------------------------------------------------------------------------------------------------------- |
| 1859 | |
| 1860 | static inline void local_sockets_process(LS_STATE *ls) { |
| 1861 | ls->timings_idx = 0; |
| 1862 | local_sockets_track_time(ls, "init"); |
| 1863 | |
| 1864 | // initialize our hashtables |
| 1865 | local_sockets_init(ls); |
| 1866 | |
| 1867 | local_sockets_track_time(ls, "all_sockets"); |
| 1868 | |
| 1869 | // read all sockets from /proc |
| 1870 | local_sockets_read_all_system_sockets(ls); |
| 1871 | |
| 1872 | // check all socket namespaces |
| 1873 | if(ls->config.namespaces) { |
| 1874 | local_sockets_track_time(ls, "switch_namespaces"); |
| 1875 | #if defined(LOCAL_SOCKETS_USE_SETNS) |
| 1876 | local_sockets_namespaces(ls); |
| 1877 | #elif !defined(OS_FREEBSD) |
| 1878 | local_sockets_namespaces_from_proc(ls); |
| 1879 | #endif |
| 1880 | // FreeBSD: jails are a different isolation model; namespace switching not supported. |
| 1881 | } |
| 1882 | |
| 1883 | // detect the directions of the sockets |
| 1884 | if(ls->config.inbound || ls->config.outbound || ls->config.local) { |
| 1885 | local_sockets_track_time(ls, "detect_direction"); |
| 1886 | local_sockets_detect_directions(ls); |
| 1887 | } |
| 1888 | |
| 1889 | // call the callback for each socket |
| 1890 | local_sockets_track_time(ls, "output"); |
| 1891 | local_sockets_foreach_local_socket_call_cb(ls); |
| 1892 | |
| 1893 | // free all memory |
| 1894 | local_sockets_track_time(ls, "cleanup"); |
| 1895 | local_sockets_cleanup(ls); |
| 1896 | } |
| 1897 | |
| 1898 | #endif //NETDATA_LOCAL_SOCKETS_H |