Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 1 | #include <sys/resource.h> |
| 2 | #include <sys/select.h> |
| 3 | #include <sys/types.h> |
| 4 | #include <sys/socket.h> |
| 5 | #include <sys/stat.h> |
| 6 | #include <sys/time.h> |
| 7 | #include <sys/ioctl.h> |
Willy Tarreau | 95a6b78 | 2016-11-12 13:25:53 +0100 | [diff] [blame] | 8 | #include <sys/wait.h> |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 9 | #include <arpa/inet.h> |
| 10 | #include <netinet/in.h> |
| 11 | #include <netinet/tcp.h> |
| 12 | |
| 13 | #include <ctype.h> |
| 14 | #include <errno.h> |
| 15 | #include <fcntl.h> |
| 16 | #include <netdb.h> |
| 17 | #include <poll.h> |
| 18 | #include <signal.h> |
| 19 | #include <stdarg.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <time.h> |
| 24 | #include <unistd.h> |
| 25 | |
| 26 | |
| 27 | struct err_msg { |
| 28 | int size; |
| 29 | int len; |
| 30 | char msg[0]; |
| 31 | }; |
| 32 | |
| 33 | const int zero = 0; |
| 34 | const int one = 1; |
| 35 | const struct linger nolinger = { .l_onoff = 1, .l_linger = 0 }; |
| 36 | |
| 37 | #define TRASH_SIZE 65536 |
| 38 | static char trash[TRASH_SIZE]; |
| 39 | |
Willy Tarreau | 95a6b78 | 2016-11-12 13:25:53 +0100 | [diff] [blame] | 40 | volatile int nbproc = 0; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 41 | static struct timeval start_time; |
| 42 | static int showtime; |
| 43 | static int verbose; |
| 44 | static int pid; |
| 45 | |
Willy Tarreau | 95a6b78 | 2016-11-12 13:25:53 +0100 | [diff] [blame] | 46 | |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 47 | /* display the message and exit with the code */ |
| 48 | __attribute__((noreturn)) void die(int code, const char *format, ...) |
| 49 | { |
| 50 | va_list args; |
| 51 | |
| 52 | va_start(args, format); |
| 53 | vfprintf(stderr, format, args); |
| 54 | va_end(args); |
| 55 | exit(code); |
| 56 | } |
| 57 | |
| 58 | /* display the usage message and exit with the code */ |
| 59 | __attribute__((noreturn)) void usage(int code, const char *arg0) |
| 60 | { |
| 61 | die(code, "Usage: %s [<ip>:]port [action*]\n", arg0); |
| 62 | } |
| 63 | |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 64 | void dolog(const char *format, ...) |
| 65 | { |
| 66 | struct timeval date, tv; |
| 67 | int delay; |
| 68 | va_list args; |
| 69 | |
| 70 | if (!verbose) |
| 71 | return; |
| 72 | |
| 73 | if (showtime) { |
| 74 | gettimeofday(&date, NULL); |
| 75 | switch (showtime) { |
| 76 | case 1: // [msec] relative |
| 77 | delay = (date.tv_sec - start_time.tv_sec) * 1000000 + date.tv_usec - start_time.tv_usec; |
| 78 | fprintf(stderr, "[%d] ", delay / 1000); |
| 79 | break; |
| 80 | case 2: // [sec.usec] relative |
| 81 | tv.tv_usec = date.tv_usec - start_time.tv_usec; |
| 82 | tv.tv_sec = date.tv_sec - start_time.tv_sec; |
| 83 | if ((signed)tv.tv_sec > 0) { |
| 84 | if ((signed)tv.tv_usec < 0) { |
| 85 | tv.tv_usec += 1000000; |
| 86 | tv.tv_sec--; |
| 87 | } |
| 88 | } else if (tv.tv_sec == 0) { |
| 89 | if ((signed)tv.tv_usec < 0) |
| 90 | tv.tv_usec = 0; |
| 91 | } else { |
| 92 | tv.tv_sec = 0; |
| 93 | tv.tv_usec = 0; |
| 94 | } |
| 95 | fprintf(stderr, "[%d.%06d] ", tv.tv_sec, tv.tv_usec); |
| 96 | break; |
| 97 | default: // [sec.usec] absolute |
| 98 | fprintf(stderr, "[%d.%06d] ", date.tv_sec, date.tv_usec); |
| 99 | break; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | fprintf(stderr, "%5d ", pid); |
| 104 | |
| 105 | va_start(args, format); |
| 106 | vfprintf(stderr, format, args); |
| 107 | va_end(args); |
| 108 | } |
| 109 | |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 110 | struct err_msg *alloc_err_msg(int size) |
| 111 | { |
| 112 | struct err_msg *err; |
| 113 | |
| 114 | err = malloc(sizeof(*err) + size); |
| 115 | if (err) { |
| 116 | err->len = 0; |
| 117 | err->size = size; |
| 118 | } |
| 119 | return err; |
| 120 | } |
| 121 | |
Willy Tarreau | 95a6b78 | 2016-11-12 13:25:53 +0100 | [diff] [blame] | 122 | void sig_handler(int sig) |
| 123 | { |
| 124 | if (sig == SIGCHLD) { |
| 125 | while (waitpid(-1, NULL, WNOHANG) > 0) |
| 126 | __sync_sub_and_fetch(&nbproc, 1); |
| 127 | } |
| 128 | } |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 129 | |
| 130 | /* converts str in the form [[<ipv4>|<ipv6>|<hostname>]:]port to struct sockaddr_storage. |
| 131 | * Returns < 0 with err set in case of error. |
| 132 | */ |
| 133 | int addr_to_ss(char *str, struct sockaddr_storage *ss, struct err_msg *err) |
| 134 | { |
| 135 | char *port_str; |
| 136 | int port; |
| 137 | |
| 138 | memset(ss, 0, sizeof(*ss)); |
| 139 | |
| 140 | /* look for the addr/port delimiter, it's the last colon. If there's no |
| 141 | * colon, it's 0:<port>. |
| 142 | */ |
| 143 | if ((port_str = strrchr(str, ':')) == NULL) { |
| 144 | port = atoi(str); |
| 145 | if (port <= 0 || port > 65535) { |
| 146 | err->len = snprintf(err->msg, err->size, "Missing/invalid port number: '%s'\n", str); |
| 147 | return -1; |
| 148 | } |
| 149 | |
| 150 | ss->ss_family = AF_INET; |
| 151 | ((struct sockaddr_in *)ss)->sin_port = htons(port); |
| 152 | ((struct sockaddr_in *)ss)->sin_addr.s_addr = INADDR_ANY; |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | *port_str++ = 0; |
| 157 | |
| 158 | if (strrchr(str, ':') != NULL) { |
| 159 | /* IPv6 address contains ':' */ |
| 160 | ss->ss_family = AF_INET6; |
| 161 | ((struct sockaddr_in6 *)ss)->sin6_port = htons(atoi(port_str)); |
| 162 | |
| 163 | if (!inet_pton(ss->ss_family, str, &((struct sockaddr_in6 *)ss)->sin6_addr)) { |
| 164 | err->len = snprintf(err->msg, err->size, "Invalid server address: '%s'\n", str); |
| 165 | return -1; |
| 166 | } |
| 167 | } |
| 168 | else { |
| 169 | ss->ss_family = AF_INET; |
| 170 | ((struct sockaddr_in *)ss)->sin_port = htons(atoi(port_str)); |
| 171 | |
| 172 | if (*str == '*' || *str == '\0') { /* INADDR_ANY */ |
| 173 | ((struct sockaddr_in *)ss)->sin_addr.s_addr = INADDR_ANY; |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | if (!inet_pton(ss->ss_family, str, &((struct sockaddr_in *)ss)->sin_addr)) { |
| 178 | struct hostent *he = gethostbyname(str); |
| 179 | |
| 180 | if (he == NULL) { |
| 181 | err->len = snprintf(err->msg, err->size, "Invalid server name: '%s'\n", str); |
| 182 | return -1; |
| 183 | } |
| 184 | ((struct sockaddr_in *)ss)->sin_addr = *(struct in_addr *) *(he->h_addr_list); |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | /* waits up to one second on fd <fd> for events <events> (POLLIN|POLLOUT). |
| 192 | * returns poll's status. |
| 193 | */ |
| 194 | int wait_on_fd(int fd, int events) |
| 195 | { |
| 196 | struct pollfd pollfd; |
| 197 | int ret; |
| 198 | |
| 199 | do { |
| 200 | pollfd.fd = fd; |
| 201 | pollfd.events = events; |
| 202 | ret = poll(&pollfd, 1, 1000); |
| 203 | } while (ret == -1 && errno == EINTR); |
| 204 | |
| 205 | return ret; |
| 206 | } |
| 207 | |
| 208 | int tcp_set_nodelay(int sock, const char *arg) |
| 209 | { |
| 210 | return setsockopt(sock, SOL_TCP, TCP_NODELAY, &one, sizeof(one)); |
| 211 | } |
| 212 | |
| 213 | int tcp_set_nolinger(int sock, const char *arg) |
| 214 | { |
| 215 | return setsockopt(sock, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger)); |
| 216 | } |
| 217 | |
| 218 | int tcp_set_noquickack(int sock, const char *arg) |
| 219 | { |
| 220 | /* warning: do not use during connect if nothing is to be sent! */ |
| 221 | return setsockopt(sock, SOL_TCP, TCP_QUICKACK, &zero, sizeof(zero)); |
| 222 | } |
| 223 | |
| 224 | /* Try to listen to address <sa>. Return the fd or -1 in case of error */ |
| 225 | int tcp_listen(const struct sockaddr_storage *sa, const char *arg) |
| 226 | { |
| 227 | int sock; |
| 228 | int backlog; |
| 229 | |
| 230 | if (arg[1]) |
| 231 | backlog = atoi(arg + 1); |
| 232 | else |
| 233 | backlog = 1000; |
| 234 | |
| 235 | if (backlog < 0 || backlog > 65535) { |
| 236 | fprintf(stderr, "backlog must be between 0 and 65535 inclusive (was %d)\n", backlog); |
| 237 | return -1; |
| 238 | } |
| 239 | |
| 240 | sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 241 | if (sock < 0) { |
| 242 | perror("socket()"); |
| 243 | return -1; |
| 244 | } |
| 245 | |
| 246 | if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) { |
| 247 | perror("setsockopt(SO_REUSEADDR)"); |
| 248 | goto fail; |
| 249 | } |
| 250 | |
| 251 | #ifdef SO_REUSEPORT |
| 252 | if (setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, (char *) &one, sizeof(one)) == -1) { |
| 253 | perror("setsockopt(SO_REUSEPORT)"); |
| 254 | goto fail; |
| 255 | } |
| 256 | #endif |
| 257 | if (bind(sock, (struct sockaddr *)sa, sa->ss_family == AF_INET6 ? |
| 258 | sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in)) == -1) { |
| 259 | perror("bind"); |
| 260 | goto fail; |
| 261 | } |
| 262 | |
| 263 | if (listen(sock, backlog) == -1) { |
| 264 | perror("listen"); |
| 265 | goto fail; |
| 266 | } |
| 267 | |
| 268 | return sock; |
| 269 | fail: |
| 270 | close(sock); |
| 271 | return -1; |
| 272 | } |
| 273 | |
| 274 | /* accepts a socket from listening socket <sock>, and returns it (or -1 in case of error) */ |
| 275 | int tcp_accept(int sock, const char *arg) |
| 276 | { |
| 277 | int count; |
| 278 | int newsock; |
| 279 | |
| 280 | if (arg[1]) |
| 281 | count = atoi(arg + 1); |
| 282 | else |
| 283 | count = 1; |
| 284 | |
| 285 | if (count <= 0) { |
| 286 | fprintf(stderr, "accept count must be > 0 or unset (was %d)\n", count); |
| 287 | return -1; |
| 288 | } |
| 289 | |
| 290 | do { |
| 291 | newsock = accept(sock, NULL, NULL); |
| 292 | if (newsock < 0) { // TODO: improve error handling |
| 293 | if (errno == EINTR || errno == EAGAIN || errno == ECONNABORTED) |
| 294 | continue; |
| 295 | perror("accept()"); |
| 296 | break; |
| 297 | } |
| 298 | |
| 299 | if (count > 1) |
| 300 | close(newsock); |
| 301 | count--; |
| 302 | } while (count > 0); |
| 303 | |
| 304 | fcntl(newsock, F_SETFL, O_NONBLOCK); |
| 305 | return newsock; |
| 306 | } |
| 307 | |
| 308 | /* Try to establish a new connection to <sa>. Return the fd or -1 in case of error */ |
| 309 | int tcp_connect(const struct sockaddr_storage *sa, const char *arg) |
| 310 | { |
| 311 | int sock; |
| 312 | |
| 313 | sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| 314 | if (sock < 0) |
| 315 | return -1; |
| 316 | |
| 317 | if (fcntl(sock, F_SETFL, O_NONBLOCK) == -1) |
| 318 | goto fail; |
| 319 | |
| 320 | if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) |
| 321 | goto fail; |
| 322 | |
| 323 | if (connect(sock, (const struct sockaddr *)sa, sizeof(*sa)) < 0) { |
| 324 | if (errno != EINPROGRESS) |
| 325 | goto fail; |
| 326 | } |
| 327 | |
| 328 | return sock; |
| 329 | fail: |
| 330 | close(sock); |
| 331 | return -1; |
| 332 | } |
| 333 | |
| 334 | /* receives N bytes from the socket and returns 0 (or -1 in case of error). |
| 335 | * When no arg is passed, receives anything and stops. Otherwise reads the |
| 336 | * requested amount of data. 0 means read as much as possible. |
| 337 | */ |
| 338 | int tcp_recv(int sock, const char *arg) |
| 339 | { |
| 340 | int count = -1; // stop at first read |
| 341 | int ret; |
| 342 | |
| 343 | if (arg[1]) { |
| 344 | count = atoi(arg + 1); |
| 345 | if (count < 0) { |
| 346 | fprintf(stderr, "recv count must be >= 0 or unset (was %d)\n", count); |
| 347 | return -1; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | while (1) { |
| 352 | ret = recv(sock, NULL, (count > 0) ? count : INT_MAX, MSG_NOSIGNAL | MSG_TRUNC); |
| 353 | if (ret < 0) { |
| 354 | if (errno == EINTR) |
| 355 | continue; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 356 | if (errno != EAGAIN) { |
| 357 | dolog("recv %d\n", ret); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 358 | return -1; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 359 | } |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 360 | while (!wait_on_fd(sock, POLLIN)); |
| 361 | continue; |
| 362 | } |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 363 | dolog("recv %d\n", ret); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 364 | if (!ret) |
| 365 | break; |
| 366 | |
| 367 | if (!count) |
| 368 | continue; |
| 369 | else if (count > 0) |
| 370 | count -= ret; |
| 371 | |
| 372 | if (count <= 0) |
| 373 | break; |
| 374 | } |
| 375 | |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | /* sends N bytes to the socket and returns 0 (or -1 in case of error). If not |
| 380 | * set, sends only one block. Sending zero means try to send forever. |
| 381 | */ |
| 382 | int tcp_send(int sock, const char *arg) |
| 383 | { |
| 384 | int count = -1; // stop after first block |
| 385 | int ret; |
| 386 | |
| 387 | if (arg[1]) { |
| 388 | count = atoi(arg + 1); |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 389 | if (count < 0) { |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 390 | fprintf(stderr, "send count must be >= 0 or unset (was %d)\n", count); |
| 391 | return -1; |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | while (1) { |
| 396 | ret = send(sock, trash, |
| 397 | (count > 0) && (count < sizeof(trash)) ? count : sizeof(trash), |
| 398 | MSG_NOSIGNAL | ((count > sizeof(trash)) ? MSG_MORE : 0)); |
| 399 | if (ret < 0) { |
| 400 | if (errno == EINTR) |
| 401 | continue; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 402 | if (errno != EAGAIN) { |
| 403 | dolog("send %d\n", ret); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 404 | return -1; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 405 | } |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 406 | while (!wait_on_fd(sock, POLLOUT)); |
| 407 | continue; |
| 408 | } |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 409 | dolog("send %d\n", ret); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 410 | if (!count) |
| 411 | continue; |
| 412 | else if (count > 0) |
| 413 | count -= ret; |
| 414 | |
| 415 | if (count <= 0) |
| 416 | break; |
| 417 | } |
| 418 | |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | /* echoes N bytes to the socket and returns 0 (or -1 in case of error). If not |
| 423 | * set, echoes only the first block. Zero means forward forever. |
| 424 | */ |
| 425 | int tcp_echo(int sock, const char *arg) |
| 426 | { |
| 427 | int count = -1; // echo forever |
| 428 | int ret; |
| 429 | int rcvd; |
| 430 | |
| 431 | if (arg[1]) { |
| 432 | count = atoi(arg + 1); |
| 433 | if (count < 0) { |
| 434 | fprintf(stderr, "send count must be >= 0 or unset (was %d)\n", count); |
| 435 | return -1; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | rcvd = 0; |
| 440 | while (1) { |
| 441 | if (rcvd <= 0) { |
| 442 | /* no data pending */ |
| 443 | rcvd = recv(sock, trash, (count > 0) && (count < sizeof(trash)) ? count : sizeof(trash), MSG_NOSIGNAL); |
| 444 | if (rcvd < 0) { |
| 445 | if (errno == EINTR) |
| 446 | continue; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 447 | if (errno != EAGAIN) { |
| 448 | dolog("recv %d\n", rcvd); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 449 | return -1; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 450 | } |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 451 | while (!wait_on_fd(sock, POLLIN)); |
| 452 | continue; |
| 453 | } |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 454 | dolog("recv %d\n", rcvd); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 455 | if (!rcvd) |
| 456 | break; |
| 457 | } |
| 458 | else { |
| 459 | /* some data still pending */ |
| 460 | ret = send(sock, trash, rcvd, MSG_NOSIGNAL | ((count > rcvd) ? MSG_MORE : 0)); |
| 461 | if (ret < 0) { |
| 462 | if (errno == EINTR) |
| 463 | continue; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 464 | if (errno != EAGAIN) { |
| 465 | dolog("send %d\n", ret); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 466 | return -1; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 467 | } |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 468 | while (!wait_on_fd(sock, POLLOUT)); |
| 469 | continue; |
| 470 | } |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 471 | dolog("send %d\n", ret); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 472 | rcvd -= ret; |
| 473 | if (rcvd) |
| 474 | continue; |
| 475 | |
| 476 | if (!count) |
| 477 | continue; |
| 478 | else if (count > 0) |
| 479 | count -= ret; |
| 480 | |
| 481 | if (count <= 0) |
| 482 | break; |
| 483 | } |
| 484 | } |
| 485 | return 0; |
| 486 | } |
| 487 | |
| 488 | /* waits for an event on the socket, usually indicates an accept for a |
| 489 | * listening socket and a connect for an outgoing socket. |
| 490 | */ |
| 491 | int tcp_wait(int sock, const char *arg) |
| 492 | { |
| 493 | struct pollfd pollfd; |
| 494 | int delay = -1; // wait forever |
| 495 | int ret; |
| 496 | |
| 497 | if (arg[1]) { |
| 498 | delay = atoi(arg + 1); |
| 499 | if (delay < 0) { |
| 500 | fprintf(stderr, "wait time must be >= 0 or unset (was %d)\n", delay); |
| 501 | return -1; |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | /* FIXME: this doesn't take into account delivered signals */ |
| 506 | do { |
| 507 | pollfd.fd = sock; |
| 508 | pollfd.events = POLLIN | POLLOUT; |
| 509 | ret = poll(&pollfd, 1, delay); |
| 510 | } while (ret == -1 && errno == EINTR); |
| 511 | |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 512 | if (ret > 0 && pollfd.revents & POLLERR) |
| 513 | return -1; |
| 514 | |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | /* waits for the input data to be present */ |
| 519 | int tcp_wait_in(int sock, const char *arg) |
| 520 | { |
| 521 | struct pollfd pollfd; |
| 522 | int ret; |
| 523 | |
| 524 | do { |
| 525 | pollfd.fd = sock; |
| 526 | pollfd.events = POLLIN; |
| 527 | ret = poll(&pollfd, 1, 1000); |
| 528 | } while (ret == -1 && errno == EINTR); |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 529 | |
| 530 | if (ret > 0 && pollfd.revents & POLLERR) |
| 531 | return -1; |
| 532 | |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 533 | return 0; |
| 534 | } |
| 535 | |
| 536 | /* waits for the output queue to be empty */ |
| 537 | int tcp_wait_out(int sock, const char *arg) |
| 538 | { |
| 539 | struct pollfd pollfd; |
| 540 | int ret; |
| 541 | |
| 542 | do { |
| 543 | pollfd.fd = sock; |
| 544 | pollfd.events = POLLOUT; |
| 545 | ret = poll(&pollfd, 1, 1000); |
| 546 | } while (ret == -1 && errno == EINTR); |
| 547 | |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 548 | if (ret > 0 && pollfd.revents & POLLERR) |
| 549 | return -1; |
| 550 | |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 551 | /* Now wait for data to leave the socket */ |
| 552 | do { |
| 553 | if (ioctl(sock, TIOCOUTQ, &ret) < 0) |
| 554 | return -1; |
| 555 | } while (ret > 0); |
| 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | /* delays processing for <time> milliseconds, 100 by default */ |
| 560 | int tcp_pause(int sock, const char *arg) |
| 561 | { |
| 562 | struct pollfd pollfd; |
| 563 | int delay = 100; |
| 564 | int ret; |
| 565 | |
| 566 | if (arg[1]) { |
| 567 | delay = atoi(arg + 1); |
| 568 | if (delay < 0) { |
| 569 | fprintf(stderr, "wait time must be >= 0 or unset (was %d)\n", delay); |
| 570 | return -1; |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | usleep(delay * 1000); |
| 575 | return 0; |
| 576 | } |
| 577 | |
Willy Tarreau | 95a6b78 | 2016-11-12 13:25:53 +0100 | [diff] [blame] | 578 | /* forks another process while respecting the limit imposed in argument (1 by |
| 579 | * default). Will wait for another process to exit before creating a new one. |
| 580 | * Returns the value of the fork() syscall, ie 0 for the child, non-zero for |
| 581 | * the parent, -1 for an error. |
| 582 | */ |
| 583 | int tcp_fork(int sock, const char *arg) |
| 584 | { |
| 585 | int max = 1; |
| 586 | int ret; |
| 587 | |
| 588 | if (arg[1]) { |
| 589 | max = atoi(arg + 1); |
| 590 | if (max <= 0) { |
| 591 | fprintf(stderr, "max process must be > 0 or unset (was %d)\n", max); |
| 592 | return -1; |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | while (nbproc >= max) |
| 597 | poll(NULL, 0, 1000); |
| 598 | |
| 599 | ret = fork(); |
| 600 | if (ret > 0) |
| 601 | __sync_add_and_fetch(&nbproc, 1); |
| 602 | return ret; |
| 603 | } |
| 604 | |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 605 | int main(int argc, char **argv) |
| 606 | { |
| 607 | struct sockaddr_storage ss; |
| 608 | struct err_msg err; |
| 609 | const char *arg0; |
| 610 | int arg; |
Willy Tarreau | 95a6b78 | 2016-11-12 13:25:53 +0100 | [diff] [blame] | 611 | int ret; |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 612 | int sock; |
| 613 | |
| 614 | arg0 = argv[0]; |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 615 | |
| 616 | while (argc > 1 && argv[1][0] == '-') { |
| 617 | argc--; argv++; |
| 618 | if (strcmp(argv[0], "-t") == 0) |
| 619 | showtime++; |
| 620 | else if (strcmp(argv[0], "-tt") == 0) |
| 621 | showtime += 2; |
| 622 | else if (strcmp(argv[0], "-ttt") == 0) |
| 623 | showtime += 3; |
| 624 | else if (strcmp(argv[0], "-v") == 0) |
| 625 | verbose ++; |
| 626 | else if (strcmp(argv[0], "--") == 0) |
| 627 | break; |
| 628 | else |
| 629 | usage(1, arg0); |
| 630 | } |
| 631 | |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 632 | if (argc < 2) |
| 633 | usage(1, arg0); |
| 634 | |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 635 | pid = getpid(); |
Willy Tarreau | 95a6b78 | 2016-11-12 13:25:53 +0100 | [diff] [blame] | 636 | signal(SIGCHLD, sig_handler); |
| 637 | |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 638 | if (addr_to_ss(argv[1], &ss, &err) < 0) |
| 639 | die(1, "%s\n", err.msg); |
| 640 | |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 641 | gettimeofday(&start_time, NULL); |
| 642 | |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 643 | sock = -1; |
| 644 | for (arg = 2; arg < argc; arg++) { |
| 645 | switch (argv[arg][0]) { |
| 646 | case 'L': |
| 647 | /* silently ignore existing connections */ |
| 648 | if (sock == -1) |
| 649 | sock = tcp_listen(&ss, argv[arg]); |
| 650 | if (sock < 0) |
| 651 | die(1, "Fatal: tcp_listen() failed.\n"); |
| 652 | break; |
| 653 | |
| 654 | case 'C': |
| 655 | /* silently ignore existing connections */ |
| 656 | if (sock == -1) |
| 657 | sock = tcp_connect(&ss, argv[arg]); |
| 658 | if (sock < 0) |
| 659 | die(1, "Fatal: tcp_connect() failed.\n"); |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 660 | dolog("connect\n"); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 661 | break; |
| 662 | |
| 663 | case 'A': |
| 664 | if (sock < 0) |
| 665 | die(1, "Fatal: tcp_accept() on non-socket.\n"); |
| 666 | sock = tcp_accept(sock, argv[arg]); |
| 667 | if (sock < 0) |
| 668 | die(1, "Fatal: tcp_accept() failed.\n"); |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 669 | dolog("accept\n"); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 670 | break; |
| 671 | |
| 672 | case 'T': |
| 673 | if (sock < 0) |
| 674 | die(1, "Fatal: tcp_set_nodelay() on non-socket.\n"); |
| 675 | if (tcp_set_nodelay(sock, argv[arg]) < 0) |
| 676 | die(1, "Fatal: tcp_set_nodelay() failed.\n"); |
| 677 | break; |
| 678 | |
| 679 | case 'G': |
| 680 | if (sock < 0) |
| 681 | die(1, "Fatal: tcp_set_nolinger() on non-socket.\n"); |
| 682 | if (tcp_set_nolinger(sock, argv[arg]) < 0) |
| 683 | die(1, "Fatal: tcp_set_nolinger() failed.\n"); |
| 684 | break; |
| 685 | |
| 686 | case 'Q': |
| 687 | if (sock < 0) |
| 688 | die(1, "Fatal: tcp_set_noquickack() on non-socket.\n"); |
| 689 | if (tcp_set_noquickack(sock, argv[arg]) < 0) |
| 690 | die(1, "Fatal: tcp_set_noquickack() failed.\n"); |
| 691 | break; |
| 692 | |
| 693 | case 'R': |
| 694 | if (sock < 0) |
| 695 | die(1, "Fatal: tcp_recv() on non-socket.\n"); |
| 696 | if (tcp_recv(sock, argv[arg]) < 0) |
| 697 | die(1, "Fatal: tcp_recv() failed.\n"); |
| 698 | break; |
| 699 | |
| 700 | case 'S': |
| 701 | if (sock < 0) |
| 702 | die(1, "Fatal: tcp_send() on non-socket.\n"); |
| 703 | if (tcp_send(sock, argv[arg]) < 0) |
| 704 | die(1, "Fatal: tcp_send() failed.\n"); |
| 705 | break; |
| 706 | |
| 707 | case 'E': |
| 708 | if (sock < 0) |
| 709 | die(1, "Fatal: tcp_echo() on non-socket.\n"); |
| 710 | if (tcp_echo(sock, argv[arg]) < 0) |
| 711 | die(1, "Fatal: tcp_echo() failed.\n"); |
| 712 | break; |
| 713 | |
| 714 | case 'P': |
| 715 | if (tcp_pause(sock, argv[arg]) < 0) |
| 716 | die(1, "Fatal: tcp_pause() failed.\n"); |
| 717 | break; |
| 718 | |
| 719 | case 'W': |
| 720 | if (sock < 0) |
| 721 | die(1, "Fatal: tcp_wait() on non-socket.\n"); |
| 722 | if (tcp_wait(sock, argv[arg]) < 0) |
| 723 | die(1, "Fatal: tcp_wait() failed.\n"); |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 724 | dolog("ready_any\n"); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 725 | break; |
| 726 | |
| 727 | case 'I': |
| 728 | if (sock < 0) |
| 729 | die(1, "Fatal: tcp_wait_in() on non-socket.\n"); |
| 730 | if (tcp_wait_in(sock, argv[arg]) < 0) |
| 731 | die(1, "Fatal: tcp_wait_in() failed.\n"); |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 732 | dolog("ready_in\n"); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 733 | break; |
| 734 | |
| 735 | case 'O': |
| 736 | if (sock < 0) |
| 737 | die(1, "Fatal: tcp_wait_out() on non-socket.\n"); |
| 738 | if (tcp_wait_out(sock, argv[arg]) < 0) |
| 739 | die(1, "Fatal: tcp_wait_out() failed.\n"); |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 740 | dolog("ready_out\n"); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 741 | break; |
| 742 | |
| 743 | case 'K': |
| 744 | if (sock < 0 || close(sock) < 0) |
| 745 | die(1, "Fatal: close() on non-socket.\n"); |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 746 | dolog("close\n"); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 747 | sock = -1; |
| 748 | break; |
| 749 | |
| 750 | case 'F': |
| 751 | /* ignore errors on shutdown() as they are common */ |
| 752 | if (sock >= 0) |
| 753 | shutdown(sock, SHUT_WR); |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 754 | dolog("shutdown\n"); |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 755 | break; |
| 756 | |
Willy Tarreau | 95a6b78 | 2016-11-12 13:25:53 +0100 | [diff] [blame] | 757 | case 'N': |
| 758 | ret = tcp_fork(sock, argv[arg]); |
| 759 | if (ret < 0) |
| 760 | die(1, "Fatal: fork() failed.\n"); |
| 761 | if (ret > 0) { |
| 762 | /* loop back to first arg */ |
| 763 | arg = 1; |
| 764 | continue; |
| 765 | } |
| 766 | /* OK we're in the child, let's continue */ |
Willy Tarreau | 869c759 | 2016-11-12 17:50:57 +0100 | [diff] [blame^] | 767 | pid = getpid(); |
Willy Tarreau | 95a6b78 | 2016-11-12 13:25:53 +0100 | [diff] [blame] | 768 | break; |
Willy Tarreau | 84393aa | 2016-11-12 11:29:46 +0100 | [diff] [blame] | 769 | default: |
| 770 | usage(1, arg0); |
| 771 | } |
| 772 | } |
| 773 | return 0; |
| 774 | } |