1 // SPDX-License-Identifier: GPL-2.0 2 3 #define _GNU_SOURCE 4 5 #include <errno.h> 6 #include <limits.h> 7 #include <fcntl.h> 8 #include <string.h> 9 #include <stdarg.h> 10 #include <stdbool.h> 11 #include <stdint.h> 12 #include <stdio.h> 13 #include <stdlib.h> 14 #include <strings.h> 15 #include <signal.h> 16 #include <unistd.h> 17 #include <time.h> 18 19 #include <sys/ioctl.h> 20 #include <sys/poll.h> 21 #include <sys/random.h> 22 #include <sys/sendfile.h> 23 #include <sys/stat.h> 24 #include <sys/socket.h> 25 #include <sys/types.h> 26 #include <sys/mman.h> 27 28 #include <arpa/inet.h> 29 30 #include <netdb.h> 31 #include <netinet/in.h> 32 33 #include <linux/tcp.h> 34 #include <linux/time_types.h> 35 #include <linux/sockios.h> 36 #include <linux/compiler.h> 37 38 extern int optind; 39 40 #ifndef IPPROTO_MPTCP 41 #define IPPROTO_MPTCP 262 42 #endif 43 #ifndef TCP_ULP 44 #define TCP_ULP 31 45 #endif 46 47 static int poll_timeout = 10 * 1000; 48 static bool listen_mode; 49 static bool quit; 50 51 enum cfg_mode { 52 CFG_MODE_POLL, 53 CFG_MODE_MMAP, 54 CFG_MODE_SENDFILE, 55 CFG_MODE_SPLICE, 56 }; 57 58 enum cfg_peek { 59 CFG_NONE_PEEK, 60 CFG_WITH_PEEK, 61 CFG_AFTER_PEEK, 62 }; 63 64 static enum cfg_mode cfg_mode = CFG_MODE_POLL; 65 static enum cfg_peek cfg_peek = CFG_NONE_PEEK; 66 static const char *cfg_host; 67 static const char *cfg_port = "12000"; 68 static int cfg_sock_proto = IPPROTO_MPTCP; 69 static int pf = AF_INET; 70 static int cfg_sndbuf; 71 static int cfg_rcvbuf; 72 static bool cfg_join; 73 static bool cfg_remove; 74 static unsigned int cfg_time; 75 static unsigned int cfg_do_w; 76 static int cfg_wait; 77 static uint32_t cfg_mark; 78 static char *cfg_input; 79 static int cfg_repeat = 1; 80 static int cfg_truncate; 81 static int cfg_rcv_trunc; 82 83 struct cfg_cmsg_types { 84 unsigned int cmsg_enabled:1; 85 unsigned int timestampns:1; 86 unsigned int tcp_inq:1; 87 }; 88 89 struct cfg_sockopt_types { 90 unsigned int transparent:1; 91 unsigned int mptfo:1; 92 }; 93 94 struct tcp_inq_state { 95 unsigned int last; 96 bool expect_eof; 97 }; 98 99 struct wstate { 100 char buf[8192]; 101 unsigned int len; 102 unsigned int off; 103 unsigned int total_len; 104 }; 105 106 static struct tcp_inq_state tcp_inq; 107 108 static struct cfg_cmsg_types cfg_cmsg_types; 109 static struct cfg_sockopt_types cfg_sockopt_types; 110 111 static void die_usage(void) 112 { 113 fprintf(stderr, "Usage: mptcp_connect [-6] [-c cmsg] [-f offset] [-i file] [-I num] [-j] [-l] " 114 "[-m mode] [-M mark] [-o option] [-p port] [-P mode] [-r num] [-R num] " 115 "[-s MPTCP|TCP] [-S num] [-t num] [-T num] [-w sec] connect_address\n"); 116 fprintf(stderr, "\t-6 use ipv6\n"); 117 fprintf(stderr, "\t-c cmsg -- test cmsg type <cmsg>\n"); 118 fprintf(stderr, "\t-f offset -- stop the I/O after receiving and sending the specified amount " 119 "of bytes. If there are unread bytes in the receive queue, that will cause a MPTCP " 120 "fastclose at close/shutdown. If offset is negative, expect the peer to close before " 121 "all the local data as been sent, thus toleration errors on write and EPIPE signals\n"); 122 fprintf(stderr, "\t-i file -- read the data to send from the given file instead of stdin"); 123 fprintf(stderr, "\t-I num -- repeat the transfer 'num' times. In listen mode accepts num " 124 "incoming connections, in client mode, disconnect and reconnect to the server\n"); 125 fprintf(stderr, "\t-j -- add additional sleep at connection start and tear down " 126 "-- for MPJ tests\n"); 127 fprintf(stderr, "\t-l -- listens mode, accepts incoming connection\n"); 128 fprintf(stderr, "\t-m [poll|mmap|sendfile|splice] -- use poll(default)/mmap+write/sendfile/splice\n"); 129 fprintf(stderr, "\t-M mark -- set socket packet mark\n"); 130 fprintf(stderr, "\t-o option -- test sockopt <option>\n"); 131 fprintf(stderr, "\t-p num -- use port num\n"); 132 fprintf(stderr, 133 "\t-P [saveWithPeek|saveAfterPeek] -- save data with/after MSG_PEEK form tcp socket\n"); 134 fprintf(stderr, "\t-r num -- enable slow mode, limiting each write to num bytes " 135 "-- for remove addr tests\n"); 136 fprintf(stderr, "\t-R num -- set SO_RCVBUF to num\n"); 137 fprintf(stderr, "\t-s [MPTCP|TCP] -- use mptcp(default) or tcp sockets\n"); 138 fprintf(stderr, "\t-S num -- set SO_SNDBUF to num\n"); 139 fprintf(stderr, "\t-t num -- set poll timeout to num\n"); 140 fprintf(stderr, "\t-T num -- set expected runtime to num ms\n"); 141 fprintf(stderr, "\t-w num -- wait num sec before closing the socket\n"); 142 exit(1); 143 } 144 145 static void __noreturn xerror(const char *fmt, ...) 146 { 147 va_list ap; 148 149 va_start(ap, fmt); 150 vfprintf(stderr, fmt, ap); 151 va_end(ap); 152 exit(1); 153 } 154 155 static void handle_signal(int nr) 156 { 157 quit = true; 158 } 159 160 static const char *getxinfo_strerr(int err) 161 { 162 if (err == EAI_SYSTEM) 163 return strerror(errno); 164 165 return gai_strerror(err); 166 } 167 168 static void xgetnameinfo(const struct sockaddr *addr, socklen_t addrlen, 169 char *host, socklen_t hostlen, 170 char *serv, socklen_t servlen) 171 { 172 int flags = NI_NUMERICHOST | NI_NUMERICSERV; 173 int err = getnameinfo(addr, addrlen, host, hostlen, serv, servlen, 174 flags); 175 176 if (err) { 177 const char *errstr = getxinfo_strerr(err); 178 179 fprintf(stderr, "Fatal: getnameinfo: %s\n", errstr); 180 exit(1); 181 } 182 } 183 184 static void xgetaddrinfo(const char *node, const char *service, 185 struct addrinfo *hints, 186 struct addrinfo **res) 187 { 188 int err; 189 190 again: 191 err = getaddrinfo(node, service, hints, res); 192 if (err) { 193 const char *errstr; 194 195 /* glibc starts to support MPTCP since v2.42. 196 * For older versions, use IPPROTO_TCP to resolve, 197 * and use TCP/MPTCP to create socket. 198 * Link: https://sourceware.org/git/?p=glibc.git;a=commit;h=a8e9022e0f82 199 */ 200 if (err == EAI_SOCKTYPE) { 201 hints->ai_protocol = IPPROTO_TCP; 202 goto again; 203 } 204 205 errstr = getxinfo_strerr(err); 206 207 fprintf(stderr, "Fatal: getaddrinfo(%s:%s): %s\n", 208 node ? node : "", service ? service : "", errstr); 209 exit(1); 210 } 211 } 212 213 static void set_rcvbuf(int fd, unsigned int size) 214 { 215 int err; 216 217 err = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &size, sizeof(size)); 218 if (err) { 219 perror("set SO_RCVBUF"); 220 exit(1); 221 } 222 } 223 224 static void set_sndbuf(int fd, unsigned int size) 225 { 226 int err; 227 228 err = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &size, sizeof(size)); 229 if (err) { 230 perror("set SO_SNDBUF"); 231 exit(1); 232 } 233 } 234 235 static void set_mark(int fd, uint32_t mark) 236 { 237 int err; 238 239 err = setsockopt(fd, SOL_SOCKET, SO_MARK, &mark, sizeof(mark)); 240 if (err) { 241 perror("set SO_MARK"); 242 exit(1); 243 } 244 } 245 246 static void set_transparent(int fd, int pf) 247 { 248 int one = 1; 249 250 switch (pf) { 251 case AF_INET: 252 if (-1 == setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one))) 253 perror("IP_TRANSPARENT"); 254 break; 255 case AF_INET6: 256 if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_TRANSPARENT, &one, sizeof(one))) 257 perror("IPV6_TRANSPARENT"); 258 break; 259 } 260 } 261 262 static void set_mptfo(int fd) 263 { 264 int qlen = 25; 265 266 if (setsockopt(fd, IPPROTO_TCP, TCP_FASTOPEN, &qlen, sizeof(qlen)) == -1) 267 perror("TCP_FASTOPEN"); 268 } 269 270 static int do_ulp_so(int sock, const char *name) 271 { 272 return setsockopt(sock, IPPROTO_TCP, TCP_ULP, name, strlen(name)); 273 } 274 275 #define X(m) xerror("%s:%u: %s: failed for proto %d at line %u", __FILE__, __LINE__, (m), proto, line) 276 static void sock_test_tcpulp(int sock, int proto, unsigned int line) 277 { 278 socklen_t buflen = 8; 279 char buf[8] = ""; 280 int ret = getsockopt(sock, IPPROTO_TCP, TCP_ULP, buf, &buflen); 281 282 if (ret != 0) 283 X("getsockopt"); 284 285 if (buflen > 0) { 286 if (strcmp(buf, "mptcp") != 0) 287 xerror("unexpected ULP '%s' for proto %d at line %u", buf, proto, line); 288 ret = do_ulp_so(sock, "tls"); 289 if (ret == 0) 290 X("setsockopt"); 291 } else if (proto == IPPROTO_MPTCP) { 292 ret = do_ulp_so(sock, "tls"); 293 if (ret != -1) 294 X("setsockopt"); 295 } 296 297 ret = do_ulp_so(sock, "mptcp"); 298 if (ret != -1) 299 X("setsockopt"); 300 301 #undef X 302 } 303 304 #define SOCK_TEST_TCPULP(s, p) sock_test_tcpulp((s), (p), __LINE__) 305 306 static int sock_listen_mptcp(const char * const listenaddr, 307 const char * const port) 308 { 309 int sock = -1; 310 struct addrinfo hints = { 311 .ai_protocol = IPPROTO_MPTCP, 312 .ai_socktype = SOCK_STREAM, 313 .ai_flags = AI_PASSIVE | AI_NUMERICHOST 314 }; 315 316 hints.ai_family = pf; 317 318 struct addrinfo *a, *addr; 319 int one = 1; 320 321 xgetaddrinfo(listenaddr, port, &hints, &addr); 322 hints.ai_family = pf; 323 324 for (a = addr; a; a = a->ai_next) { 325 sock = socket(a->ai_family, a->ai_socktype, cfg_sock_proto); 326 if (sock < 0) 327 continue; 328 329 SOCK_TEST_TCPULP(sock, cfg_sock_proto); 330 331 if (-1 == setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, 332 sizeof(one))) 333 perror("setsockopt"); 334 335 if (cfg_sockopt_types.transparent) 336 set_transparent(sock, pf); 337 338 if (cfg_sockopt_types.mptfo) 339 set_mptfo(sock); 340 341 if (bind(sock, a->ai_addr, a->ai_addrlen) == 0) 342 break; /* success */ 343 344 perror("bind"); 345 close(sock); 346 sock = -1; 347 } 348 349 freeaddrinfo(addr); 350 351 if (sock < 0) { 352 fprintf(stderr, "Could not create listen socket\n"); 353 return sock; 354 } 355 356 SOCK_TEST_TCPULP(sock, cfg_sock_proto); 357 358 if (listen(sock, 20)) { 359 perror("listen"); 360 close(sock); 361 return -1; 362 } 363 364 SOCK_TEST_TCPULP(sock, cfg_sock_proto); 365 366 return sock; 367 } 368 369 static int sock_connect_mptcp(const char * const remoteaddr, 370 const char * const port, int proto, 371 struct addrinfo **peer, 372 int infd, struct wstate *winfo) 373 { 374 struct addrinfo hints = { 375 .ai_protocol = IPPROTO_MPTCP, 376 .ai_socktype = SOCK_STREAM, 377 }; 378 struct addrinfo *a, *addr; 379 int syn_copied = 0; 380 int sock = -1; 381 382 hints.ai_family = pf; 383 384 /* Keep the resolved address alive for the whole execution: it is 385 * used again when reconnecting, and will be released at exit time. 386 */ 387 xgetaddrinfo(remoteaddr, port, &hints, &addr); 388 for (a = addr; a; a = a->ai_next) { 389 sock = socket(a->ai_family, a->ai_socktype, proto); 390 if (sock < 0) { 391 perror("socket"); 392 continue; 393 } 394 395 SOCK_TEST_TCPULP(sock, proto); 396 397 if (cfg_mark) 398 set_mark(sock, cfg_mark); 399 400 if (cfg_sockopt_types.mptfo) { 401 if (!winfo->total_len) 402 winfo->total_len = winfo->len = read(infd, winfo->buf, 403 sizeof(winfo->buf)); 404 405 syn_copied = sendto(sock, winfo->buf, winfo->len, MSG_FASTOPEN, 406 a->ai_addr, a->ai_addrlen); 407 if (syn_copied >= 0) { 408 winfo->off = syn_copied; 409 winfo->len -= syn_copied; 410 *peer = a; 411 break; /* success */ 412 } 413 perror("sendto()"); 414 } else { 415 if (connect(sock, a->ai_addr, a->ai_addrlen) == 0) { 416 *peer = a; 417 break; /* success */ 418 } 419 perror("connect()"); 420 } 421 422 /* error */ 423 close(sock); 424 sock = -1; 425 } 426 427 if (sock != -1) 428 SOCK_TEST_TCPULP(sock, proto); 429 return sock; 430 } 431 432 static size_t do_rnd_write(const int fd, char *buf, const size_t len) 433 { 434 static bool first = true; 435 unsigned int do_w; 436 ssize_t bw; 437 438 do_w = rand() & 0xffff; 439 if (do_w == 0 || do_w > len) 440 do_w = len; 441 442 if (cfg_join && first && do_w > 100) 443 do_w = 100; 444 445 if (cfg_remove && do_w > cfg_do_w) 446 do_w = cfg_do_w; 447 448 bw = write(fd, buf, do_w); 449 if (bw < 0) 450 return bw; 451 452 /* let the join handshake complete, before going on */ 453 if (cfg_join && first) { 454 usleep(200000); 455 first = false; 456 } 457 458 if (cfg_remove) 459 usleep(200000); 460 461 return bw; 462 } 463 464 static size_t do_write(const int fd, char *buf, const size_t len) 465 { 466 size_t offset = 0; 467 468 while (offset < len) { 469 size_t written; 470 ssize_t bw; 471 472 bw = write(fd, buf + offset, len - offset); 473 if (bw < 0) { 474 perror("write"); 475 return 0; 476 } 477 478 written = (size_t)bw; 479 offset += written; 480 } 481 482 return offset; 483 } 484 485 static void process_cmsg(struct msghdr *msgh) 486 { 487 struct __kernel_timespec ts; 488 bool inq_found = false; 489 bool ts_found = false; 490 unsigned int inq = 0; 491 struct cmsghdr *cmsg; 492 493 for (cmsg = CMSG_FIRSTHDR(msgh); cmsg ; cmsg = CMSG_NXTHDR(msgh, cmsg)) { 494 if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SO_TIMESTAMPNS_NEW) { 495 memcpy(&ts, CMSG_DATA(cmsg), sizeof(ts)); 496 ts_found = true; 497 continue; 498 } 499 if (cmsg->cmsg_level == IPPROTO_TCP && cmsg->cmsg_type == TCP_CM_INQ) { 500 memcpy(&inq, CMSG_DATA(cmsg), sizeof(inq)); 501 inq_found = true; 502 continue; 503 } 504 505 } 506 507 if (cfg_cmsg_types.timestampns) { 508 if (!ts_found) 509 xerror("TIMESTAMPNS not present\n"); 510 } 511 512 if (cfg_cmsg_types.tcp_inq) { 513 if (!inq_found) 514 xerror("TCP_INQ not present\n"); 515 516 if (inq > 1024) 517 xerror("tcp_inq %u is larger than one kbyte\n", inq); 518 tcp_inq.last = inq; 519 } 520 } 521 522 static ssize_t do_recvmsg_cmsg(const int fd, char *buf, const size_t len) 523 { 524 char msg_buf[8192]; 525 struct iovec iov = { 526 .iov_base = buf, 527 .iov_len = len, 528 }; 529 struct msghdr msg = { 530 .msg_iov = &iov, 531 .msg_iovlen = 1, 532 .msg_control = msg_buf, 533 .msg_controllen = sizeof(msg_buf), 534 }; 535 int flags = 0; 536 unsigned int last_hint = tcp_inq.last; 537 int ret = recvmsg(fd, &msg, flags); 538 539 if (ret <= 0) { 540 if (ret == 0 && tcp_inq.expect_eof) 541 return ret; 542 543 if (ret == 0 && cfg_cmsg_types.tcp_inq) 544 if (last_hint != 1 && last_hint != 0) 545 xerror("EOF but last tcp_inq hint was %u\n", last_hint); 546 547 return ret; 548 } 549 550 if (tcp_inq.expect_eof) 551 xerror("expected EOF, last_hint %u, now %u\n", 552 last_hint, tcp_inq.last); 553 554 if (msg.msg_controllen && !cfg_cmsg_types.cmsg_enabled) 555 xerror("got %lu bytes of cmsg data, expected 0\n", 556 (unsigned long)msg.msg_controllen); 557 558 if (msg.msg_controllen == 0 && cfg_cmsg_types.cmsg_enabled) 559 xerror("%s\n", "got no cmsg data"); 560 561 if (msg.msg_controllen) 562 process_cmsg(&msg); 563 564 if (cfg_cmsg_types.tcp_inq) { 565 if ((size_t)ret < len && last_hint > (unsigned int)ret) { 566 if (ret + 1 != (int)last_hint) { 567 int next = read(fd, msg_buf, sizeof(msg_buf)); 568 569 xerror("read %u of %u, last_hint was %u tcp_inq hint now %u next_read returned %d/%m\n", 570 ret, (unsigned int)len, last_hint, tcp_inq.last, next); 571 } else { 572 tcp_inq.expect_eof = true; 573 } 574 } 575 } 576 577 return ret; 578 } 579 580 static ssize_t do_rnd_read(const int fd, char *buf, const size_t len) 581 { 582 int ret = 0; 583 char tmp[16384]; 584 size_t cap = rand(); 585 586 cap &= 0xffff; 587 588 if (cap == 0) 589 cap = 1; 590 else if (cap > len) 591 cap = len; 592 593 if (cfg_peek == CFG_WITH_PEEK) { 594 ret = recv(fd, buf, cap, MSG_PEEK); 595 ret = (ret < 0) ? ret : read(fd, tmp, ret); 596 } else if (cfg_peek == CFG_AFTER_PEEK) { 597 ret = recv(fd, buf, cap, MSG_PEEK); 598 ret = (ret < 0) ? ret : read(fd, buf, cap); 599 } else if (cfg_cmsg_types.cmsg_enabled) { 600 ret = do_recvmsg_cmsg(fd, buf, cap); 601 } else { 602 ret = read(fd, buf, cap); 603 } 604 605 return ret; 606 } 607 608 static void set_nonblock(int fd, bool nonblock) 609 { 610 int flags = fcntl(fd, F_GETFL); 611 612 if (flags == -1) 613 return; 614 615 if (nonblock) 616 fcntl(fd, F_SETFL, flags | O_NONBLOCK); 617 else 618 fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); 619 } 620 621 static void shut_wr(int fd) 622 { 623 /* Close our write side, ev. give some time 624 * for address notification and/or checking 625 * the current status 626 */ 627 if (cfg_wait) 628 usleep(cfg_wait); 629 630 shutdown(fd, SHUT_WR); 631 } 632 633 static int copyfd_io_poll(int infd, int peerfd, int outfd, 634 bool *in_closed_after_out, struct wstate *winfo) 635 { 636 struct pollfd fds = { 637 .fd = peerfd, 638 .events = POLLIN | POLLOUT, 639 }; 640 unsigned int total_wlen = 0, total_rlen = 0; 641 642 set_nonblock(peerfd, true); 643 644 for (;;) { 645 char rbuf[8192]; 646 ssize_t len; 647 648 if (fds.events == 0 || quit) 649 break; 650 651 switch (poll(&fds, 1, poll_timeout)) { 652 case -1: 653 if (errno == EINTR) 654 continue; 655 perror("poll"); 656 return 1; 657 case 0: 658 fprintf(stderr, "%s: poll timed out (events: " 659 "POLLIN %u, POLLOUT %u)\n", __func__, 660 fds.events & POLLIN, fds.events & POLLOUT); 661 return 2; 662 } 663 664 if (fds.revents & POLLIN) { 665 ssize_t rb = sizeof(rbuf); 666 667 /* limit the total amount of read data to the trunc value*/ 668 if (cfg_truncate > 0) { 669 if (rb + total_rlen > cfg_truncate) 670 rb = cfg_truncate - total_rlen; 671 len = read(peerfd, rbuf, rb); 672 } else { 673 len = do_rnd_read(peerfd, rbuf, sizeof(rbuf)); 674 } 675 if (len == 0) { 676 /* no more data to receive: 677 * peer has closed its write side 678 */ 679 fds.events &= ~POLLIN; 680 681 if ((fds.events & POLLOUT) == 0) { 682 *in_closed_after_out = true; 683 /* and nothing more to send */ 684 break; 685 } 686 687 /* Else, still have data to transmit */ 688 } else if (len < 0) { 689 if (cfg_rcv_trunc) 690 return 0; 691 perror("read"); 692 return 3; 693 } 694 695 total_rlen += len; 696 do_write(outfd, rbuf, len); 697 } 698 699 if (fds.revents & POLLOUT) { 700 if (winfo->len == 0) { 701 winfo->off = 0; 702 winfo->len = read(infd, winfo->buf, sizeof(winfo->buf)); 703 } 704 705 if (winfo->len > 0) { 706 ssize_t bw; 707 708 /* limit the total amount of written data to the trunc value */ 709 if (cfg_truncate > 0 && winfo->len + total_wlen > cfg_truncate) 710 winfo->len = cfg_truncate - total_wlen; 711 712 bw = do_rnd_write(peerfd, winfo->buf + winfo->off, winfo->len); 713 if (bw < 0) { 714 /* expected reset, continue to read */ 715 if (cfg_rcv_trunc && 716 (errno == ECONNRESET || 717 errno == EPIPE)) { 718 fds.events &= ~POLLOUT; 719 continue; 720 } 721 722 perror("write"); 723 return 111; 724 } 725 726 winfo->off += bw; 727 winfo->len -= bw; 728 total_wlen += bw; 729 } else if (winfo->len == 0) { 730 /* We have no more data to send. */ 731 fds.events &= ~POLLOUT; 732 733 if ((fds.events & POLLIN) == 0) 734 /* ... and peer also closed already */ 735 break; 736 737 shut_wr(peerfd); 738 } else { 739 if (errno == EINTR) 740 continue; 741 perror("read"); 742 return 4; 743 } 744 } 745 746 if (fds.revents & (POLLERR | POLLNVAL)) { 747 if (cfg_rcv_trunc) { 748 fds.events &= ~(POLLERR | POLLNVAL); 749 continue; 750 } 751 fprintf(stderr, "Unexpected revents: " 752 "POLLERR/POLLNVAL(%x)\n", fds.revents); 753 return 5; 754 } 755 756 if (cfg_truncate > 0 && total_wlen >= cfg_truncate && 757 total_rlen >= cfg_truncate) 758 break; 759 } 760 761 /* leave some time for late join/announce */ 762 if (cfg_remove && !quit) 763 usleep(cfg_wait); 764 765 return 0; 766 } 767 768 static int do_recvfile(int infd, int outfd) 769 { 770 ssize_t r; 771 772 do { 773 char buf[16384]; 774 775 r = do_rnd_read(infd, buf, sizeof(buf)); 776 if (r > 0) { 777 if (write(outfd, buf, r) != r) 778 break; 779 } else if (r < 0) { 780 perror("read"); 781 } 782 } while (r > 0); 783 784 return (int)r; 785 } 786 787 static int spool_buf(int fd, struct wstate *winfo) 788 { 789 while (winfo->len) { 790 int ret = write(fd, winfo->buf + winfo->off, winfo->len); 791 792 if (ret < 0) { 793 perror("write"); 794 return 4; 795 } 796 winfo->off += ret; 797 winfo->len -= ret; 798 } 799 return 0; 800 } 801 802 static int do_mmap(int infd, int outfd, unsigned int size, 803 struct wstate *winfo) 804 { 805 char *inbuf = mmap(NULL, size, PROT_READ, MAP_SHARED, infd, 0); 806 ssize_t ret = 0, off = winfo->total_len; 807 size_t rem; 808 809 if (inbuf == MAP_FAILED) { 810 perror("mmap"); 811 return 1; 812 } 813 814 ret = spool_buf(outfd, winfo); 815 if (ret < 0) 816 return ret; 817 818 rem = size - winfo->total_len; 819 820 while (rem > 0) { 821 ret = write(outfd, inbuf + off, rem); 822 823 if (ret < 0) { 824 perror("write"); 825 break; 826 } 827 828 off += ret; 829 rem -= ret; 830 } 831 832 munmap(inbuf, size); 833 return rem; 834 } 835 836 static int get_infd_size(int fd) 837 { 838 struct stat sb; 839 ssize_t count; 840 int err; 841 842 err = fstat(fd, &sb); 843 if (err < 0) { 844 perror("fstat"); 845 return -1; 846 } 847 848 if ((sb.st_mode & S_IFMT) != S_IFREG) { 849 fprintf(stderr, "%s: stdin is not a regular file\n", __func__); 850 return -2; 851 } 852 853 count = sb.st_size; 854 if (count > INT_MAX) { 855 fprintf(stderr, "File too large: %zu\n", count); 856 return -3; 857 } 858 859 return (int)count; 860 } 861 862 static int do_sendfile(int infd, int outfd, unsigned int count, 863 struct wstate *winfo) 864 { 865 int ret = spool_buf(outfd, winfo); 866 867 if (ret < 0) 868 return ret; 869 870 count -= winfo->total_len; 871 872 while (count > 0) { 873 ssize_t r; 874 875 r = sendfile(outfd, infd, NULL, count); 876 if (r < 0) { 877 perror("sendfile"); 878 return 3; 879 } 880 881 count -= r; 882 } 883 884 return 0; 885 } 886 887 static int copyfd_io_mmap(int infd, int peerfd, int outfd, 888 unsigned int size, bool *in_closed_after_out, 889 struct wstate *winfo) 890 { 891 int err; 892 893 if (listen_mode) { 894 err = do_recvfile(peerfd, outfd); 895 if (err) 896 return err; 897 898 err = do_mmap(infd, peerfd, size, winfo); 899 } else { 900 err = do_mmap(infd, peerfd, size, winfo); 901 if (err) 902 return err; 903 904 shut_wr(peerfd); 905 906 err = do_recvfile(peerfd, outfd); 907 *in_closed_after_out = true; 908 } 909 910 return err; 911 } 912 913 static int copyfd_io_sendfile(int infd, int peerfd, int outfd, 914 unsigned int size, bool *in_closed_after_out, struct wstate *winfo) 915 { 916 int err; 917 918 if (listen_mode) { 919 err = do_recvfile(peerfd, outfd); 920 if (err) 921 return err; 922 923 err = do_sendfile(infd, peerfd, size, winfo); 924 } else { 925 err = do_sendfile(infd, peerfd, size, winfo); 926 if (err) 927 return err; 928 929 shut_wr(peerfd); 930 931 err = do_recvfile(peerfd, outfd); 932 *in_closed_after_out = true; 933 } 934 935 return err; 936 } 937 938 static int do_splice(const int infd, const int outfd, const size_t len, 939 struct wstate *winfo) 940 { 941 ssize_t in_bytes, out_bytes; 942 int pipefd[2]; 943 int err; 944 945 err = pipe(pipefd); 946 if (err) { 947 perror("pipe"); 948 return 2; 949 } 950 951 again: 952 in_bytes = splice(infd, NULL, pipefd[1], NULL, len - winfo->total_len, 953 SPLICE_F_MOVE | SPLICE_F_MORE); 954 if (in_bytes < 0) { 955 perror("splice in"); 956 err = 3; 957 } else if (in_bytes > 0) { 958 out_bytes = splice(pipefd[0], NULL, outfd, NULL, in_bytes, 959 SPLICE_F_MOVE | SPLICE_F_MORE); 960 if (out_bytes < 0) { 961 perror("splice out"); 962 err = 4; 963 } else if (in_bytes != out_bytes) { 964 fprintf(stderr, "Unexpected transfer: %zu vs %zu\n", 965 in_bytes, out_bytes); 966 err = 5; 967 } else { 968 goto again; 969 } 970 } 971 972 close(pipefd[0]); 973 close(pipefd[1]); 974 975 return err; 976 } 977 978 static int copyfd_io_splice(int infd, int peerfd, int outfd, unsigned int size, 979 bool *in_closed_after_out, struct wstate *winfo) 980 { 981 int err; 982 983 if (listen_mode) { 984 err = do_splice(peerfd, outfd, size, winfo); 985 if (err) 986 return err; 987 988 err = do_splice(infd, peerfd, size, winfo); 989 } else { 990 err = do_splice(infd, peerfd, size, winfo); 991 if (err) 992 return err; 993 994 shut_wr(peerfd); 995 996 err = do_splice(peerfd, outfd, size, winfo); 997 *in_closed_after_out = true; 998 } 999 1000 return err; 1001 } 1002 1003 static int copyfd_io(int infd, int peerfd, int outfd, bool close_peerfd, struct wstate *winfo) 1004 { 1005 bool in_closed_after_out = false; 1006 struct timespec start, end; 1007 int file_size; 1008 int ret; 1009 1010 if (cfg_time && (clock_gettime(CLOCK_MONOTONIC, &start) < 0)) 1011 xerror("can not fetch start time %d", errno); 1012 1013 switch (cfg_mode) { 1014 case CFG_MODE_POLL: 1015 ret = copyfd_io_poll(infd, peerfd, outfd, &in_closed_after_out, 1016 winfo); 1017 break; 1018 1019 case CFG_MODE_MMAP: 1020 file_size = get_infd_size(infd); 1021 if (file_size < 0) 1022 return file_size; 1023 ret = copyfd_io_mmap(infd, peerfd, outfd, file_size, 1024 &in_closed_after_out, winfo); 1025 break; 1026 1027 case CFG_MODE_SENDFILE: 1028 file_size = get_infd_size(infd); 1029 if (file_size < 0) 1030 return file_size; 1031 ret = copyfd_io_sendfile(infd, peerfd, outfd, file_size, 1032 &in_closed_after_out, winfo); 1033 break; 1034 1035 case CFG_MODE_SPLICE: 1036 file_size = get_infd_size(infd); 1037 if (file_size < 0) 1038 return file_size; 1039 ret = copyfd_io_splice(infd, peerfd, outfd, file_size, 1040 &in_closed_after_out, winfo); 1041 break; 1042 1043 default: 1044 fprintf(stderr, "Invalid mode %d\n", cfg_mode); 1045 1046 die_usage(); 1047 return 1; 1048 } 1049 1050 if (ret) 1051 return ret; 1052 1053 if (close_peerfd) 1054 close(peerfd); 1055 1056 if (cfg_time) { 1057 unsigned int delta_ms; 1058 1059 if (clock_gettime(CLOCK_MONOTONIC, &end) < 0) 1060 xerror("can not fetch end time %d", errno); 1061 delta_ms = (end.tv_sec - start.tv_sec) * 1000 + (end.tv_nsec - start.tv_nsec) / 1000000; 1062 if (delta_ms > cfg_time) { 1063 xerror("transfer slower than expected! runtime %d ms, expected %d ms", 1064 delta_ms, cfg_time); 1065 } 1066 1067 /* show the runtime only if this end shutdown(wr) before receiving the EOF, 1068 * (that is, if this end got the longer runtime) 1069 */ 1070 if (in_closed_after_out) 1071 fprintf(stderr, "%d", delta_ms); 1072 } 1073 1074 return 0; 1075 } 1076 1077 static void check_sockaddr(int pf, struct sockaddr_storage *ss, 1078 socklen_t salen) 1079 { 1080 struct sockaddr_in6 *sin6; 1081 struct sockaddr_in *sin; 1082 socklen_t wanted_size = 0; 1083 1084 switch (pf) { 1085 case AF_INET: 1086 wanted_size = sizeof(*sin); 1087 sin = (void *)ss; 1088 if (!sin->sin_port) 1089 fprintf(stderr, "accept: something wrong: ip connection from port 0"); 1090 break; 1091 case AF_INET6: 1092 wanted_size = sizeof(*sin6); 1093 sin6 = (void *)ss; 1094 if (!sin6->sin6_port) 1095 fprintf(stderr, "accept: something wrong: ipv6 connection from port 0"); 1096 break; 1097 default: 1098 fprintf(stderr, "accept: Unknown pf %d, salen %u\n", pf, salen); 1099 return; 1100 } 1101 1102 if (salen != wanted_size) 1103 fprintf(stderr, "accept: size mismatch, got %d expected %d\n", 1104 (int)salen, wanted_size); 1105 1106 if (ss->ss_family != pf) 1107 fprintf(stderr, "accept: pf mismatch, expect %d, ss_family is %d\n", 1108 (int)ss->ss_family, pf); 1109 } 1110 1111 static void check_getpeername(int fd, struct sockaddr_storage *ss, socklen_t salen) 1112 { 1113 struct sockaddr_storage peerss; 1114 socklen_t peersalen = sizeof(peerss); 1115 1116 if (getpeername(fd, (struct sockaddr *)&peerss, &peersalen) < 0) { 1117 perror("getpeername"); 1118 return; 1119 } 1120 1121 if (peersalen != salen) { 1122 fprintf(stderr, "%s: %d vs %d\n", __func__, peersalen, salen); 1123 return; 1124 } 1125 1126 if (memcmp(ss, &peerss, peersalen)) { 1127 char a[INET6_ADDRSTRLEN]; 1128 char b[INET6_ADDRSTRLEN]; 1129 char c[INET6_ADDRSTRLEN]; 1130 char d[INET6_ADDRSTRLEN]; 1131 1132 xgetnameinfo((struct sockaddr *)ss, salen, 1133 a, sizeof(a), b, sizeof(b)); 1134 1135 xgetnameinfo((struct sockaddr *)&peerss, peersalen, 1136 c, sizeof(c), d, sizeof(d)); 1137 1138 fprintf(stderr, "%s: memcmp failure: accept %s vs peername %s, %s vs %s salen %d vs %d\n", 1139 __func__, a, c, b, d, peersalen, salen); 1140 } 1141 } 1142 1143 static void check_getpeername_connect(int fd) 1144 { 1145 struct sockaddr_storage ss; 1146 socklen_t salen = sizeof(ss); 1147 char a[INET6_ADDRSTRLEN]; 1148 char b[INET6_ADDRSTRLEN]; 1149 const char *iface; 1150 size_t len; 1151 1152 if (getpeername(fd, (struct sockaddr *)&ss, &salen) < 0) { 1153 perror("getpeername"); 1154 return; 1155 } 1156 1157 xgetnameinfo((struct sockaddr *)&ss, salen, 1158 a, sizeof(a), b, sizeof(b)); 1159 1160 iface = strchr(cfg_host, '%'); 1161 if (iface) 1162 len = iface - cfg_host; 1163 else 1164 len = strlen(cfg_host) + 1; 1165 1166 if (strncmp(cfg_host, a, len) || strcmp(cfg_port, b)) 1167 fprintf(stderr, "%s: %s vs %s, %s vs %s\n", __func__, 1168 cfg_host, a, cfg_port, b); 1169 } 1170 1171 static void maybe_close(int fd) 1172 { 1173 unsigned int r = rand(); 1174 1175 if (!(cfg_join || cfg_remove || cfg_repeat > 1) && (r & 1)) 1176 close(fd); 1177 } 1178 1179 int main_loop_s(int listensock) 1180 { 1181 struct sockaddr_storage ss; 1182 struct wstate winfo; 1183 struct pollfd polls; 1184 socklen_t salen; 1185 int remotesock; 1186 int err = 0; 1187 int fd = 0; 1188 1189 again: 1190 polls.fd = listensock; 1191 polls.events = POLLIN; 1192 1193 switch (poll(&polls, 1, poll_timeout)) { 1194 case -1: 1195 perror("poll"); 1196 return 1; 1197 case 0: 1198 fprintf(stderr, "%s: timed out\n", __func__); 1199 close(listensock); 1200 return 2; 1201 } 1202 1203 salen = sizeof(ss); 1204 remotesock = accept(listensock, (struct sockaddr *)&ss, &salen); 1205 if (remotesock >= 0) { 1206 maybe_close(listensock); 1207 check_sockaddr(pf, &ss, salen); 1208 check_getpeername(remotesock, &ss, salen); 1209 1210 if (cfg_input) { 1211 fd = open(cfg_input, O_RDONLY); 1212 if (fd < 0) 1213 xerror("can't open %s: %d", cfg_input, errno); 1214 } 1215 1216 SOCK_TEST_TCPULP(remotesock, 0); 1217 1218 memset(&winfo, 0, sizeof(winfo)); 1219 err = copyfd_io(fd, remotesock, 1, true, &winfo); 1220 } else { 1221 perror("accept"); 1222 return 1; 1223 } 1224 1225 if (cfg_input) 1226 close(fd); 1227 1228 if (!err && --cfg_repeat > 0) 1229 goto again; 1230 1231 return err; 1232 } 1233 1234 static void init_rng(void) 1235 { 1236 unsigned int foo; 1237 1238 if (getrandom(&foo, sizeof(foo), 0) == -1) { 1239 perror("getrandom"); 1240 exit(1); 1241 } 1242 1243 srand(foo); 1244 } 1245 1246 static void xsetsockopt(int fd, int level, int optname, const void *optval, socklen_t optlen) 1247 { 1248 int err; 1249 1250 err = setsockopt(fd, level, optname, optval, optlen); 1251 if (err) { 1252 perror("setsockopt"); 1253 exit(1); 1254 } 1255 } 1256 1257 static void apply_cmsg_types(int fd, const struct cfg_cmsg_types *cmsg) 1258 { 1259 static const unsigned int on = 1; 1260 1261 if (cmsg->timestampns) 1262 xsetsockopt(fd, SOL_SOCKET, SO_TIMESTAMPNS_NEW, &on, sizeof(on)); 1263 if (cmsg->tcp_inq) 1264 xsetsockopt(fd, IPPROTO_TCP, TCP_INQ, &on, sizeof(on)); 1265 } 1266 1267 static void parse_cmsg_types(const char *type) 1268 { 1269 const char *next = strchr(type, ','); 1270 unsigned int len = 0; 1271 1272 cfg_cmsg_types.cmsg_enabled = 1; 1273 1274 if (next) { 1275 parse_cmsg_types(next + 1); 1276 len = next - type; 1277 } else { 1278 len = strlen(type); 1279 } 1280 1281 if (strncmp(type, "TIMESTAMPNS", len) == 0) { 1282 cfg_cmsg_types.timestampns = 1; 1283 return; 1284 } 1285 1286 if (strncmp(type, "TCPINQ", len) == 0) { 1287 cfg_cmsg_types.tcp_inq = 1; 1288 return; 1289 } 1290 1291 fprintf(stderr, "Unrecognized cmsg option %s\n", type); 1292 exit(1); 1293 } 1294 1295 static void parse_setsock_options(const char *name) 1296 { 1297 const char *next = strchr(name, ','); 1298 unsigned int len = 0; 1299 1300 if (next) { 1301 parse_setsock_options(next + 1); 1302 len = next - name; 1303 } else { 1304 len = strlen(name); 1305 } 1306 1307 if (strncmp(name, "TRANSPARENT", len) == 0) { 1308 cfg_sockopt_types.transparent = 1; 1309 return; 1310 } 1311 1312 if (strncmp(name, "MPTFO", len) == 0) { 1313 cfg_sockopt_types.mptfo = 1; 1314 return; 1315 } 1316 1317 fprintf(stderr, "Unrecognized setsockopt option %s\n", name); 1318 exit(1); 1319 } 1320 1321 void xdisconnect(int fd) 1322 { 1323 socklen_t addrlen = sizeof(struct sockaddr_storage); 1324 struct sockaddr_storage addr, empty; 1325 int msec_sleep = 10; 1326 void *raw_addr; 1327 int i, cmdlen; 1328 char cmd[128]; 1329 1330 /* get the local address and convert it to string */ 1331 if (getsockname(fd, (struct sockaddr *)&addr, &addrlen) < 0) 1332 xerror("getsockname"); 1333 1334 if (addr.ss_family == AF_INET) 1335 raw_addr = &(((struct sockaddr_in *)&addr)->sin_addr); 1336 else if (addr.ss_family == AF_INET6) 1337 raw_addr = &(((struct sockaddr_in6 *)&addr)->sin6_addr); 1338 else 1339 xerror("bad family"); 1340 1341 strcpy(cmd, "ss -Mnt | grep -q "); 1342 cmdlen = strlen(cmd); 1343 if (!inet_ntop(addr.ss_family, raw_addr, &cmd[cmdlen], 1344 sizeof(cmd) - cmdlen)) 1345 xerror("inet_ntop"); 1346 1347 shutdown(fd, SHUT_WR); 1348 1349 /* 1350 * wait until the pending data is completely flushed and all 1351 * the sockets reached the closed status. 1352 * disconnect will bypass/ignore/drop any pending data. 1353 */ 1354 for (i = 0; ; i += msec_sleep) { 1355 /* closed socket are not listed by 'ss' */ 1356 if (system(cmd) != 0) 1357 break; 1358 1359 if (i > poll_timeout) 1360 xerror("timeout while waiting for spool to complete"); 1361 usleep(msec_sleep * 1000); 1362 } 1363 1364 memset(&empty, 0, sizeof(empty)); 1365 empty.ss_family = AF_UNSPEC; 1366 if (connect(fd, (struct sockaddr *)&empty, addrlen) < 0) 1367 xerror("can't disconnect: %d", errno); 1368 } 1369 1370 int main_loop(void) 1371 { 1372 struct addrinfo *peer = NULL; 1373 int fd = 0, ret, fd_in = 0; 1374 struct wstate winfo; 1375 1376 if (cfg_input && cfg_sockopt_types.mptfo) { 1377 fd_in = open(cfg_input, O_RDONLY); 1378 if (fd_in < 0) 1379 xerror("can't open %s:%d", cfg_input, errno); 1380 } 1381 1382 memset(&winfo, 0, sizeof(winfo)); 1383 fd = sock_connect_mptcp(cfg_host, cfg_port, cfg_sock_proto, &peer, fd_in, &winfo); 1384 if (fd < 0) 1385 return 2; 1386 1387 again: 1388 check_getpeername_connect(fd); 1389 1390 SOCK_TEST_TCPULP(fd, cfg_sock_proto); 1391 1392 if (cfg_rcvbuf) 1393 set_rcvbuf(fd, cfg_rcvbuf); 1394 if (cfg_sndbuf) 1395 set_sndbuf(fd, cfg_sndbuf); 1396 if (cfg_cmsg_types.cmsg_enabled) 1397 apply_cmsg_types(fd, &cfg_cmsg_types); 1398 1399 if (cfg_input && !cfg_sockopt_types.mptfo) { 1400 fd_in = open(cfg_input, O_RDONLY); 1401 if (fd_in < 0) 1402 xerror("can't open %s:%d", cfg_input, errno); 1403 } 1404 1405 ret = copyfd_io(fd_in, fd, 1, 0, &winfo); 1406 if (ret) 1407 goto out; 1408 1409 if (cfg_truncate > 0) { 1410 shutdown(fd, SHUT_WR); 1411 } else if (--cfg_repeat > 0) { 1412 xdisconnect(fd); 1413 1414 /* the socket could be unblocking at this point, we need the 1415 * connect to be blocking 1416 */ 1417 set_nonblock(fd, false); 1418 if (connect(fd, peer->ai_addr, peer->ai_addrlen)) 1419 xerror("can't reconnect: %d", errno); 1420 if (cfg_input) 1421 close(fd_in); 1422 memset(&winfo, 0, sizeof(winfo)); 1423 goto again; 1424 } else { 1425 close(fd); 1426 } 1427 1428 out: 1429 if (cfg_input) 1430 close(fd_in); 1431 return ret; 1432 } 1433 1434 int parse_proto(const char *proto) 1435 { 1436 if (!strcasecmp(proto, "MPTCP")) 1437 return IPPROTO_MPTCP; 1438 if (!strcasecmp(proto, "TCP")) 1439 return IPPROTO_TCP; 1440 1441 fprintf(stderr, "Unknown protocol: %s\n.", proto); 1442 die_usage(); 1443 1444 /* silence compiler warning */ 1445 return 0; 1446 } 1447 1448 int parse_mode(const char *mode) 1449 { 1450 if (!strcasecmp(mode, "poll")) 1451 return CFG_MODE_POLL; 1452 if (!strcasecmp(mode, "mmap")) 1453 return CFG_MODE_MMAP; 1454 if (!strcasecmp(mode, "sendfile")) 1455 return CFG_MODE_SENDFILE; 1456 if (!strcasecmp(mode, "splice")) 1457 return CFG_MODE_SPLICE; 1458 1459 fprintf(stderr, "Unknown test mode: %s\n", mode); 1460 fprintf(stderr, "Supported modes are:\n"); 1461 fprintf(stderr, "\t\t\"poll\" - interleaved read/write using poll()\n"); 1462 fprintf(stderr, "\t\t\"mmap\" - send entire input file (mmap+write), then read response (-l will read input first)\n"); 1463 fprintf(stderr, "\t\t\"sendfile\" - send entire input file (sendfile), then read response (-l will read input first)\n"); 1464 fprintf(stderr, "\t\t\"splice\" - send entire input file (splice), then read response (-l will read input first)\n"); 1465 1466 die_usage(); 1467 1468 /* silence compiler warning */ 1469 return 0; 1470 } 1471 1472 int parse_peek(const char *mode) 1473 { 1474 if (!strcasecmp(mode, "saveWithPeek")) 1475 return CFG_WITH_PEEK; 1476 if (!strcasecmp(mode, "saveAfterPeek")) 1477 return CFG_AFTER_PEEK; 1478 1479 fprintf(stderr, "Unknown: %s\n", mode); 1480 fprintf(stderr, "Supported MSG_PEEK mode are:\n"); 1481 fprintf(stderr, 1482 "\t\t\"saveWithPeek\" - recv data with flags 'MSG_PEEK' and save the peek data into file\n"); 1483 fprintf(stderr, 1484 "\t\t\"saveAfterPeek\" - read and save data into file after recv with flags 'MSG_PEEK'\n"); 1485 1486 die_usage(); 1487 1488 /* silence compiler warning */ 1489 return 0; 1490 } 1491 1492 static int parse_int(const char *size) 1493 { 1494 unsigned long s; 1495 1496 errno = 0; 1497 1498 s = strtoul(size, NULL, 0); 1499 1500 if (errno) { 1501 fprintf(stderr, "Invalid sndbuf size %s (%s)\n", 1502 size, strerror(errno)); 1503 die_usage(); 1504 } 1505 1506 if (s > INT_MAX) { 1507 fprintf(stderr, "Invalid sndbuf size %s (%s)\n", 1508 size, strerror(ERANGE)); 1509 die_usage(); 1510 } 1511 1512 return (int)s; 1513 } 1514 1515 static void parse_opts(int argc, char **argv) 1516 { 1517 int c; 1518 1519 while ((c = getopt(argc, argv, "6c:f:hi:I:jlm:M:o:p:P:r:R:s:S:t:T:w:")) != -1) { 1520 switch (c) { 1521 case 'f': 1522 cfg_truncate = atoi(optarg); 1523 1524 /* when receiving a fastclose, ignore PIPE signals and 1525 * all the I/O errors later in the code 1526 */ 1527 if (cfg_truncate < 0) { 1528 cfg_rcv_trunc = true; 1529 signal(SIGPIPE, SIG_IGN); 1530 } 1531 break; 1532 case 'j': 1533 cfg_join = true; 1534 cfg_mode = CFG_MODE_POLL; 1535 break; 1536 case 'r': 1537 cfg_remove = true; 1538 cfg_mode = CFG_MODE_POLL; 1539 cfg_wait = 400000; 1540 cfg_do_w = atoi(optarg); 1541 if (cfg_do_w <= 0) 1542 cfg_do_w = 50; 1543 break; 1544 case 'i': 1545 cfg_input = optarg; 1546 break; 1547 case 'I': 1548 cfg_repeat = atoi(optarg); 1549 break; 1550 case 'l': 1551 listen_mode = true; 1552 break; 1553 case 'p': 1554 cfg_port = optarg; 1555 break; 1556 case 's': 1557 cfg_sock_proto = parse_proto(optarg); 1558 break; 1559 case 'h': 1560 die_usage(); 1561 break; 1562 case '6': 1563 pf = AF_INET6; 1564 break; 1565 case 't': 1566 poll_timeout = atoi(optarg) * 1000; 1567 if (poll_timeout <= 0) 1568 poll_timeout = -1; 1569 break; 1570 case 'T': 1571 cfg_time = atoi(optarg); 1572 break; 1573 case 'm': 1574 cfg_mode = parse_mode(optarg); 1575 break; 1576 case 'S': 1577 cfg_sndbuf = parse_int(optarg); 1578 break; 1579 case 'R': 1580 cfg_rcvbuf = parse_int(optarg); 1581 break; 1582 case 'w': 1583 cfg_wait = atoi(optarg)*1000000; 1584 break; 1585 case 'M': 1586 cfg_mark = strtol(optarg, NULL, 0); 1587 break; 1588 case 'P': 1589 cfg_peek = parse_peek(optarg); 1590 break; 1591 case 'c': 1592 parse_cmsg_types(optarg); 1593 break; 1594 case 'o': 1595 parse_setsock_options(optarg); 1596 break; 1597 } 1598 } 1599 1600 if (optind + 1 != argc) 1601 die_usage(); 1602 cfg_host = argv[optind]; 1603 1604 if (strchr(cfg_host, ':')) 1605 pf = AF_INET6; 1606 } 1607 1608 int main(int argc, char *argv[]) 1609 { 1610 init_rng(); 1611 1612 signal(SIGUSR1, handle_signal); 1613 parse_opts(argc, argv); 1614 1615 if (listen_mode) { 1616 int fd = sock_listen_mptcp(cfg_host, cfg_port); 1617 1618 if (fd < 0) 1619 return 1; 1620 1621 if (cfg_rcvbuf) 1622 set_rcvbuf(fd, cfg_rcvbuf); 1623 if (cfg_sndbuf) 1624 set_sndbuf(fd, cfg_sndbuf); 1625 if (cfg_mark) 1626 set_mark(fd, cfg_mark); 1627 if (cfg_cmsg_types.cmsg_enabled) 1628 apply_cmsg_types(fd, &cfg_cmsg_types); 1629 1630 return main_loop_s(fd); 1631 } 1632 1633 return main_loop(); 1634 } 1635