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