1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #ifndef lint
33 static const char copyright[] =
34 "@(#) Copyright (c) 1983, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
36 #endif
37
38 #if 0
39 #ifndef lint
40 static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
41 #endif
42 #endif
43
44 #include <sys/cdefs.h>
45 /* Many bug fixes are from Jim Guyton <guyton@rand-unix> */
46
47 /*
48 * TFTP User Program -- Command Interface.
49 */
50 #include <sys/param.h>
51 #include <sys/file.h>
52 #include <sys/socket.h>
53 #include <sys/stat.h>
54 #include <sys/sysctl.h>
55
56 #include <netinet/in.h>
57 #include <arpa/inet.h>
58 #include <arpa/tftp.h>
59
60 #include <ctype.h>
61 #include <err.h>
62 #include <histedit.h>
63 #include <netdb.h>
64 #include <setjmp.h>
65 #include <signal.h>
66 #include <stdbool.h>
67 #include <stddef.h>
68 #include <stdio.h>
69 #include <stdlib.h>
70 #include <string.h>
71 #include <unistd.h>
72
73 #include "tftp-utils.h"
74 #include "tftp-io.h"
75 #include "tftp-options.h"
76 #include "tftp.h"
77
78 #define MAXLINE (2 * MAXPATHLEN)
79 #define TIMEOUT 5 /* secs between rexmt's */
80
81 typedef struct sockaddr_storage peeraddr;
82 static int connected;
83 static char mode[32];
84 static jmp_buf toplevel;
85 static int txrx_error;
86 static int peer;
87
88 #define MAX_MARGV 20
89 static int margc;
90 static char *margv[MAX_MARGV];
91
92 int verbose;
93 static char *port = NULL;
94
95 static void get(int, char **);
96 static void help(int, char **);
97 static void intr(int);
98 static void modecmd(int, char **);
99 static void put(int, char **);
100 static void quit(int, char **);
101 static void setascii(int, char **);
102 static void setbinary(int, char **);
103 static void setpeer0(char *, const char *);
104 static void setpeer(int, char **);
105 static void settimeoutpacket(int, char **);
106 static void settimeoutnetwork(int, char **);
107 static void setdebug(int, char **);
108 static void setverbose(int, char **);
109 static void showstatus(int, char **);
110 static void setblocksize(int, char **);
111 static void setblocksize2(int, char **);
112 static void setoptions(int, char **);
113 static void setrollover(int, char **);
114 static void setpacketdrop(int, char **);
115 static void setwindowsize(int, char **);
116
117 static void command(bool, EditLine *, History *, HistEvent *) __dead2;
118 static const char *command_prompt(void);
119
120 static void urihandling(char *URI);
121 static void getusage(char *);
122 static void makeargv(char *line);
123 static void putusage(char *);
124 static void settftpmode(const char *);
125
126 static char *tail(char *);
127 static const struct cmd *getcmd(const char *);
128
129 #define HELPINDENT (sizeof("connect"))
130
131 struct cmd {
132 const char *name;
133 void (*handler)(int, char **);
134 const char *help;
135 };
136
137 static struct cmd cmdtab[] = {
138 { "connect", setpeer, "connect to remote tftp" },
139 { "mode", modecmd, "set file transfer mode" },
140 { "put", put, "send file" },
141 { "get", get, "receive file" },
142 { "quit", quit, "exit tftp" },
143 { "verbose", setverbose, "toggle verbose mode" },
144 { "status", showstatus, "show current status" },
145 { "binary", setbinary, "set mode to octet" },
146 { "ascii", setascii, "set mode to netascii" },
147 { "rexmt", settimeoutpacket,
148 "set per-packet retransmission timeout[-]" },
149 { "timeout", settimeoutnetwork,
150 "set total retransmission timeout" },
151 { "trace", setdebug, "enable 'debug packet'[-]" },
152 { "debug", setdebug, "enable verbose output" },
153 { "blocksize", setblocksize, "set blocksize[*]" },
154 { "blocksize2", setblocksize2, "set blocksize as a power of 2[**]" },
155 { "rollover", setrollover, "rollover after 64K packets[**]" },
156 { "options", setoptions,
157 "enable or disable RFC2347 style options" },
158 { "help", help, "print help information" },
159 { "packetdrop", setpacketdrop, "artificial packetloss feature" },
160 { "windowsize", setwindowsize, "set windowsize[*]" },
161 { "?", help, "print help information" },
162 { NULL, NULL, NULL }
163 };
164
165 static struct modes {
166 const char *m_name;
167 const char *m_mode;
168 } modes[] = {
169 { "ascii", "netascii" },
170 { "netascii", "netascii" },
171 { "binary", "octet" },
172 { "image", "octet" },
173 { "octet", "octet" },
174 { NULL, NULL }
175 };
176
177 int
main(int argc,char * argv[])178 main(int argc, char *argv[])
179 {
180 HistEvent he;
181 static EditLine *el;
182 static History *hist;
183 bool interactive;
184
185 acting_as_client = 1;
186 peer = -1;
187 strcpy(mode, "octet");
188 signal(SIGINT, intr);
189
190 interactive = isatty(STDIN_FILENO);
191 if (interactive) {
192 el = el_init("tftp", stdin, stdout, stderr);
193 hist = history_init();
194 history(hist, &he, H_SETSIZE, 100);
195 el_set(el, EL_HIST, history, hist);
196 el_set(el, EL_EDITOR, "emacs");
197 el_set(el, EL_PROMPT, command_prompt);
198 el_set(el, EL_SIGNAL, 1);
199 el_source(el, NULL);
200 }
201
202 if (argc > 1) {
203 if (setjmp(toplevel) != 0)
204 exit(txrx_error);
205
206 if (strncmp(argv[1], "tftp://", 7) == 0) {
207 urihandling(argv[1]);
208 exit(txrx_error);
209 }
210
211 setpeer(argc, argv);
212 }
213
214 if (setjmp(toplevel) != 0) {
215 if (interactive)
216 el_reset(el);
217 (void)putchar('\n');
218 }
219
220 init_options();
221 command(interactive, el, hist, &he);
222 }
223
224 /*
225 * RFC3617 handling of TFTP URIs:
226 *
227 * tftpURI = "tftp://" host "/" file [ mode ]
228 * mode = ";" "mode=" ( "netascii" / "octet" )
229 * file = *( unreserved / escaped )
230 * host = <as specified by RFC 2732>
231 * unreserved = <as specified in RFC 2396>
232 * escaped = <as specified in RFC 2396>
233 *
234 * We are cheating a little bit by allowing any mode as specified in the
235 * modes table defined earlier on in this file and mapping it on the real
236 * mode.
237 */
238 static void
urihandling(char * URI)239 urihandling(char *URI)
240 {
241 char uri[ARG_MAX];
242 char *host = NULL;
243 char *path = NULL;
244 char *opts = NULL;
245 const char *tmode = "octet";
246 char *s;
247 char line[MAXLINE];
248 int i;
249
250 strlcpy(uri, URI, ARG_MAX);
251 host = uri + 7;
252
253 if ((s = strchr(host, '/')) == NULL) {
254 fprintf(stderr,
255 "Invalid URI: Couldn't find / after hostname\n");
256 exit(1);
257 }
258 *s = '\0';
259 path = s + 1;
260
261 if ((s = strchr(path, ';')) != NULL) {
262 *s = '\0';
263 opts = s + 1;
264
265 if (strncmp(opts, "mode=", 5) == 0) {
266 tmode = opts;
267 tmode += 5;
268
269 for (i = 0; modes[i].m_name != NULL; i++) {
270 if (strcmp(modes[i].m_name, tmode) == 0)
271 break;
272 }
273 if (modes[i].m_name == NULL) {
274 fprintf(stderr, "Invalid mode: '%s'\n", mode);
275 exit(1);
276 }
277 settftpmode(modes[i].m_mode);
278 }
279 } else {
280 settftpmode("octet");
281 }
282
283 setpeer0(host, NULL);
284
285 sprintf(line, "get %s", path);
286 makeargv(line);
287 get(margc, margv);
288 }
289
290 static char hostname[MAXHOSTNAMELEN];
291
292 static void
setpeer0(char * host,const char * lport)293 setpeer0(char *host, const char *lport)
294 {
295 struct addrinfo hints, *res0, *res;
296 int error;
297 const char *cause = "unknown";
298
299 if (connected) {
300 close(peer);
301 peer = -1;
302 }
303 connected = 0;
304
305 memset(&hints, 0, sizeof(hints));
306 hints.ai_family = PF_UNSPEC;
307 hints.ai_socktype = SOCK_DGRAM;
308 hints.ai_protocol = IPPROTO_UDP;
309 hints.ai_flags = AI_CANONNAME;
310 if (!lport)
311 lport = "tftp";
312 error = getaddrinfo(host, lport, &hints, &res0);
313 if (error) {
314 warnx("%s", gai_strerror(error));
315 return;
316 }
317
318 for (res = res0; res; res = res->ai_next) {
319 if (res->ai_addrlen > sizeof(peeraddr))
320 continue;
321 peer = socket(res->ai_family, res->ai_socktype,
322 res->ai_protocol);
323 if (peer < 0) {
324 cause = "socket";
325 continue;
326 }
327
328 memset(&peer_sock, 0, sizeof(peer_sock));
329 peer_sock.ss_family = res->ai_family;
330 peer_sock.ss_len = res->ai_addrlen;
331 if (bind(peer, (struct sockaddr *)&peer_sock, peer_sock.ss_len) < 0) {
332 cause = "bind";
333 close(peer);
334 peer = -1;
335 continue;
336 }
337
338 break;
339 }
340
341 if (peer < 0)
342 warn("%s", cause);
343 else {
344 /* res->ai_addr <= sizeof(peeraddr) is guaranteed */
345 memcpy(&peer_sock, res->ai_addr, res->ai_addrlen);
346 if (res->ai_canonname) {
347 (void) strlcpy(hostname, res->ai_canonname,
348 sizeof(hostname));
349 } else
350 (void) strlcpy(hostname, host, sizeof(hostname));
351 connected = 1;
352 }
353
354 freeaddrinfo(res0);
355 }
356
357 static void
setpeer(int argc,char * argv[])358 setpeer(int argc, char *argv[])
359 {
360 char line[MAXLINE];
361
362 if (argc < 2) {
363 strcpy(line, "Connect ");
364 printf("(to) ");
365 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
366 makeargv(line);
367 argc = margc;
368 argv = margv;
369 }
370 if ((argc < 2) || (argc > 3)) {
371 printf("usage: %s [host [port]]\n", argv[0]);
372 return;
373 }
374 if (argc == 3) {
375 port = argv[2];
376 setpeer0(argv[1], argv[2]);
377 } else
378 setpeer0(argv[1], NULL);
379 }
380
381 static void
modecmd(int argc,char * argv[])382 modecmd(int argc, char *argv[])
383 {
384 struct modes *p;
385 const char *sep;
386
387 if (argc < 2) {
388 printf("Using %s mode to transfer files.\n", mode);
389 return;
390 }
391 if (argc == 2) {
392 for (p = modes; p->m_name; p++)
393 if (strcmp(argv[1], p->m_name) == 0)
394 break;
395 if (p->m_name) {
396 settftpmode(p->m_mode);
397 return;
398 }
399 printf("%s: unknown mode\n", argv[1]);
400 /* drop through and print usage message */
401 }
402
403 printf("usage: %s [", argv[0]);
404 sep = " ";
405 for (p = modes; p->m_name != NULL; p++) {
406 printf("%s%s", sep, p->m_name);
407 if (*sep == ' ')
408 sep = " | ";
409 }
410 printf(" ]\n");
411 return;
412 }
413
414 static void
setbinary(int argc __unused,char * argv[]__unused)415 setbinary(int argc __unused, char *argv[] __unused)
416 {
417
418 settftpmode("octet");
419 }
420
421 static void
setascii(int argc __unused,char * argv[]__unused)422 setascii(int argc __unused, char *argv[] __unused)
423 {
424
425 settftpmode("netascii");
426 }
427
428 static void
settftpmode(const char * newmode)429 settftpmode(const char *newmode)
430 {
431
432 strlcpy(mode, newmode, sizeof(mode));
433 if (verbose)
434 printf("mode set to %s\n", mode);
435 }
436
437
438 /*
439 * Send file(s).
440 */
441 static void
put(int argc,char * argv[])442 put(int argc, char *argv[])
443 {
444 int fd;
445 int n;
446 char *cp, *targ, *path;
447 char line[MAXLINE];
448 struct stat sb;
449
450 if (argc < 2) {
451 strcpy(line, "send ");
452 printf("(file) ");
453 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
454 makeargv(line);
455 argc = margc;
456 argv = margv;
457 }
458 if (argc < 2) {
459 putusage(argv[0]);
460 return;
461 }
462 targ = argv[argc - 1];
463 if (strrchr(argv[argc - 1], ':')) {
464 char *lcp;
465
466 for (n = 1; n < argc - 1; n++)
467 if (strchr(argv[n], ':')) {
468 putusage(argv[0]);
469 return;
470 }
471 lcp = argv[argc - 1];
472 targ = strrchr(lcp, ':');
473 *targ++ = 0;
474 if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
475 lcp[strlen(lcp) - 1] = '\0';
476 lcp++;
477 }
478 setpeer0(lcp, NULL);
479 }
480 if (!connected) {
481 printf("No target machine specified.\n");
482 return;
483 }
484 if (argc < 4) {
485 cp = argc == 2 ? tail(targ) : argv[1];
486 fd = open(cp, O_RDONLY);
487 if (fd < 0) {
488 warn("%s", cp);
489 return;
490 }
491
492 if (fstat(fd, &sb) < 0) {
493 warn("%s", cp);
494 close(fd);
495 return;
496 }
497 options_set_request(OPT_TSIZE, "%ju", (uintmax_t)sb.st_size);
498
499 if (verbose)
500 printf("putting %s to %s:%s [%s]\n",
501 cp, hostname, targ, mode);
502 if (xmitfile(peer, port, fd, targ, mode))
503 txrx_error = 1;
504 close(fd);
505 return;
506 }
507 /* this assumes the target is a directory */
508 /* on a remote unix system. hmmmm. */
509 for (n = 1; n < argc - 1; n++) {
510 if (asprintf(&path, "%s/%s", targ, tail(argv[n])) < 0)
511 err(1, "malloc");
512
513 fd = open(argv[n], O_RDONLY);
514 if (fd < 0) {
515 warn("%s", argv[n]);
516 free(path);
517 continue;
518 }
519
520 if (fstat(fd, &sb) < 0) {
521 warn("%s", argv[n]);
522 close(fd);
523 free(path);
524 continue;
525 }
526 options_set_request(OPT_TSIZE, "%ju", (uintmax_t)sb.st_size);
527
528 if (verbose)
529 printf("putting %s to %s:%s [%s]\n",
530 argv[n], hostname, path, mode);
531 if (xmitfile(peer, port, fd, path, mode) != 0)
532 txrx_error = 1;
533 close(fd);
534
535 free(path);
536 }
537 }
538
539 static void
putusage(char * s)540 putusage(char *s)
541 {
542
543 printf("usage: %s file [remotename]\n", s);
544 printf(" %s file host:remotename\n", s);
545 printf(" %s file1 file2 ... fileN [[host:]remote-directory]\n", s);
546 }
547
548 /*
549 * Receive file(s).
550 */
551 static void
get(int argc,char * argv[])552 get(int argc, char *argv[])
553 {
554 int fd;
555 int n;
556 char *cp;
557 char *src;
558 char line[MAXLINE];
559
560 if (argc < 2) {
561 strcpy(line, "get ");
562 printf("(files) ");
563 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
564 makeargv(line);
565 argc = margc;
566 argv = margv;
567 }
568 if (argc < 2) {
569 getusage(argv[0]);
570 return;
571 }
572 if (!connected) {
573 for (n = 1; n < argc ; n++)
574 if (strrchr(argv[n], ':') == 0) {
575 printf("No remote host specified and "
576 "no host given for file '%s'\n", argv[n]);
577 getusage(argv[0]);
578 return;
579 }
580 }
581 for (n = 1; n < argc ; n++) {
582 src = strrchr(argv[n], ':');
583 if (src == NULL)
584 src = argv[n];
585 else {
586 char *lcp;
587
588 *src++ = 0;
589 lcp = argv[n];
590 if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
591 lcp[strlen(lcp) - 1] = '\0';
592 lcp++;
593 }
594 setpeer0(lcp, NULL);
595 if (!connected)
596 continue;
597 }
598 if (argc < 4) {
599 cp = argc == 3 ? argv[2] : tail(src);
600 fd = creat(cp, 0644);
601 if (fd < 0) {
602 warn("%s", cp);
603 return;
604 }
605 if (verbose)
606 printf("getting from %s:%s to %s [%s]\n",
607 hostname, src, cp, mode);
608 if (recvfile(peer, port, fd, src, mode) != 0)
609 txrx_error = 1;
610 break;
611 }
612 cp = tail(src); /* new .. jdg */
613 fd = creat(cp, 0644);
614 if (fd < 0) {
615 warn("%s", cp);
616 continue;
617 }
618 if (verbose)
619 printf("getting from %s:%s to %s [%s]\n",
620 hostname, src, cp, mode);
621 if (recvfile(peer, port, fd, src, mode) != 0)
622 txrx_error = 1;
623 }
624 }
625
626 static void
getusage(char * s)627 getusage(char *s)
628 {
629
630 printf("usage: %s file [localname]\n", s);
631 printf(" %s [host:]file [localname]\n", s);
632 printf(" %s [host1:]file1 [host2:]file2 ... [hostN:]fileN\n", s);
633 }
634
635 static void
settimeoutpacket(int argc,char * argv[])636 settimeoutpacket(int argc, char *argv[])
637 {
638 int t;
639 char line[MAXLINE];
640
641 if (argc < 2) {
642 strcpy(line, "Packet timeout ");
643 printf("(value) ");
644 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
645 makeargv(line);
646 argc = margc;
647 argv = margv;
648 }
649 if (argc != 2) {
650 printf("usage: %s value\n", argv[0]);
651 return;
652 }
653 t = atoi(argv[1]);
654 if (t < 0) {
655 printf("%s: bad value\n", argv[1]);
656 return;
657 }
658
659 settimeouts(t, timeoutnetwork, maxtimeouts);
660 }
661
662 static void
settimeoutnetwork(int argc,char * argv[])663 settimeoutnetwork(int argc, char *argv[])
664 {
665 int t;
666 char line[MAXLINE];
667
668 if (argc < 2) {
669 strcpy(line, "Network timeout ");
670 printf("(value) ");
671 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
672 makeargv(line);
673 argc = margc;
674 argv = margv;
675 }
676 if (argc != 2) {
677 printf("usage: %s value\n", argv[0]);
678 return;
679 }
680 t = atoi(argv[1]);
681 if (t < 0) {
682 printf("%s: bad value\n", argv[1]);
683 return;
684 }
685
686 settimeouts(timeoutpacket, t, maxtimeouts);
687 }
688
689 static void
showstatus(int argc __unused,char * argv[]__unused)690 showstatus(int argc __unused, char *argv[] __unused)
691 {
692
693 printf("Remote host: %s\n",
694 connected ? hostname : "none specified yet");
695 printf("RFC2347 Options support: %s\n",
696 options_rfc_enabled ? "enabled" : "disabled");
697 printf("Non-RFC defined options support: %s\n",
698 options_extra_enabled ? "enabled" : "disabled");
699 printf("Mode: %s\n", mode);
700 printf("Verbose: %s\n", verbose ? "on" : "off");
701 printf("Debug: %s\n", debug_show(debug));
702 printf("Artificial packetloss: %d in 100 packets\n",
703 packetdroppercentage);
704 printf("Segment size: %d bytes\n", segsize);
705 printf("Network timeout: %d seconds\n", timeoutpacket);
706 printf("Maximum network timeout: %d seconds\n", timeoutnetwork);
707 printf("Maximum timeouts: %d \n", maxtimeouts);
708 }
709
710 static void
intr(int dummy __unused)711 intr(int dummy __unused)
712 {
713
714 signal(SIGALRM, SIG_IGN);
715 alarm(0);
716 longjmp(toplevel, -1);
717 }
718
719 static char *
tail(char * filename)720 tail(char *filename)
721 {
722 char *s;
723
724 while (*filename) {
725 s = strrchr(filename, '/');
726 if (s == NULL)
727 break;
728 if (s[1])
729 return (s + 1);
730 *s = '\0';
731 }
732 return (filename);
733 }
734
735 static const char *
command_prompt(void)736 command_prompt(void)
737 {
738
739 return ("tftp> ");
740 }
741
742 /*
743 * Command parser.
744 */
745 static void
command(bool interactive,EditLine * el,History * hist,HistEvent * hep)746 command(bool interactive, EditLine *el, History *hist, HistEvent *hep)
747 {
748 const struct cmd *c;
749 const char *bp;
750 char *cp;
751 int len, num;
752 char line[MAXLINE];
753
754 for (;;) {
755 if (interactive) {
756 if ((bp = el_gets(el, &num)) == NULL || num == 0)
757 exit(0);
758 len = MIN(MAXLINE, num);
759 memcpy(line, bp, len);
760 line[len - 1] = '\0';
761 history(hist, hep, H_ENTER, bp);
762 } else {
763 line[0] = 0;
764 if (fgets(line, sizeof line , stdin) == NULL) {
765 if (feof(stdin)) {
766 exit(txrx_error);
767 } else {
768 continue;
769 }
770 }
771 }
772 if ((cp = strchr(line, '\n')))
773 *cp = '\0';
774 if (line[0] == 0)
775 continue;
776 makeargv(line);
777 if (margc == 0)
778 continue;
779 c = getcmd(margv[0]);
780 if (c == (struct cmd *)-1) {
781 printf("?Ambiguous command\n");
782 continue;
783 }
784 if (c == NULL) {
785 printf("?Invalid command\n");
786 continue;
787 }
788 (*c->handler)(margc, margv);
789 }
790 }
791
792 static const struct cmd *
getcmd(const char * name)793 getcmd(const char *name)
794 {
795 const char *p, *q;
796 const struct cmd *c, *found;
797 ptrdiff_t longest;
798 int nmatches;
799
800 longest = 0;
801 nmatches = 0;
802 found = 0;
803 for (c = cmdtab; (p = c->name) != NULL; c++) {
804 for (q = name; *q == *p++; q++)
805 if (*q == '\0') /* exact match? */
806 return (c);
807 if (*q == '\0') { /* the name was a prefix */
808 if (q - name > longest) {
809 longest = q - name;
810 nmatches = 1;
811 found = c;
812 } else if (q - name == longest)
813 nmatches++;
814 }
815 }
816 if (nmatches > 1)
817 return ((struct cmd *)-1);
818 return (found);
819 }
820
821 /*
822 * Slice a string up into argc/argv.
823 */
824 static void
makeargv(char * line)825 makeargv(char *line)
826 {
827 char *cp;
828 char **argp = margv;
829
830 margc = 0;
831 if ((cp = strchr(line, '\n')) != NULL)
832 *cp = '\0';
833 for (cp = line; margc < MAX_MARGV - 1 && *cp != '\0';) {
834 while (isspace(*cp))
835 cp++;
836 if (*cp == '\0')
837 break;
838 *argp++ = cp;
839 margc += 1;
840 while (*cp != '\0' && !isspace(*cp))
841 cp++;
842 if (*cp == '\0')
843 break;
844 *cp++ = '\0';
845 }
846 *argp++ = 0;
847 }
848
849 static void
quit(int argc __unused,char * argv[]__unused)850 quit(int argc __unused, char *argv[] __unused)
851 {
852
853 exit(txrx_error);
854 }
855
856 /*
857 * Help command.
858 */
859 static void
help(int argc,char * argv[])860 help(int argc, char *argv[])
861 {
862 const struct cmd *c;
863
864 if (argc == 1) {
865 printf("Commands may be abbreviated. Commands are:\n\n");
866 for (c = cmdtab; c->name; c++)
867 printf("%-*s\t%s\n", (int)HELPINDENT, c->name, c->help);
868
869 printf("\n[-] : You shouldn't use these ones anymore.\n");
870 printf("[*] : RFC2347 options support required.\n");
871 printf("[**] : Non-standard RFC2347 option.\n");
872 return;
873 }
874 while (--argc > 0) {
875 char *arg;
876 arg = *++argv;
877 c = getcmd(arg);
878 if (c == (struct cmd *)-1)
879 printf("?Ambiguous help command: %s\n", arg);
880 else if (c == (struct cmd *)0)
881 printf("?Invalid help command: %s\n", arg);
882 else
883 printf("%s\n", c->help);
884 }
885 }
886
887 static void
setverbose(int argc __unused,char * argv[]__unused)888 setverbose(int argc __unused, char *argv[] __unused)
889 {
890
891 verbose = !verbose;
892 printf("Verbose mode %s.\n", verbose ? "on" : "off");
893 }
894
895 static void
setoptions(int argc,char * argv[])896 setoptions(int argc, char *argv[])
897 {
898
899 if (argc == 2) {
900 if (strcasecmp(argv[1], "enable") == 0 ||
901 strcasecmp(argv[1], "on") == 0) {
902 options_extra_enabled = 1;
903 options_rfc_enabled = 1;
904 }
905 if (strcasecmp(argv[1], "disable") == 0 ||
906 strcasecmp(argv[1], "off") == 0) {
907 options_extra_enabled = 0;
908 options_rfc_enabled = 0;
909 }
910 if (strcasecmp(argv[1], "extra") == 0)
911 options_extra_enabled = !options_extra_enabled;
912 }
913 printf("Support for RFC2347 style options are now %s.\n",
914 options_rfc_enabled ? "enabled" : "disabled");
915 printf("Support for non-RFC defined options are now %s.\n",
916 options_extra_enabled ? "enabled" : "disabled");
917
918 printf("\nThe following options are available:\n"
919 "\toptions on : enable support for RFC2347 style options\n"
920 "\toptions off : disable support for RFC2347 style options\n"
921 "\toptions extra : toggle support for non-RFC defined options\n"
922 );
923 }
924
925 static void
setrollover(int argc,char * argv[])926 setrollover(int argc, char *argv[])
927 {
928
929 if (argc == 2) {
930 if (strcasecmp(argv[1], "never") == 0 ||
931 strcasecmp(argv[1], "none") == 0) {
932 options_set_request(OPT_ROLLOVER, NULL);
933 }
934 if (strcasecmp(argv[1], "1") == 0) {
935 options_set_request(OPT_ROLLOVER, "1");
936 }
937 if (strcasecmp(argv[1], "0") == 0) {
938 options_set_request(OPT_ROLLOVER, "0");
939 }
940 }
941 printf("Support for the rollover options is %s.\n",
942 options[OPT_ROLLOVER].o_request != NULL ? "enabled" : "disabled");
943 if (options[OPT_ROLLOVER].o_request != NULL)
944 printf("Block rollover will be to block %s.\n",
945 options[OPT_ROLLOVER].o_request);
946
947
948 printf("\nThe following rollover options are available:\n"
949 "\trollover 0 : rollover to block zero (default)\n"
950 "\trollover 1 : rollover to block one\n"
951 "\trollover never : do not support the rollover option\n"
952 "\trollover none : do not support the rollover option\n"
953 );
954 }
955
956 static void
setdebug(int argc,char * argv[])957 setdebug(int argc, char *argv[])
958 {
959 int i;
960
961 if (argc != 1) {
962 i = 1;
963 while (i < argc)
964 debug ^= debug_find(argv[i++]);
965 }
966 printf("The following debugging is enabled: %s\n", debug_show(debug));
967
968 printf("\nThe following debugs are available:\n");
969 i = 0;
970 while (debugs[i].name != NULL) {
971 printf("\t%s\t%s\n", debugs[i].name, debugs[i].desc);
972 i++;
973 }
974 }
975
976 static void
setblocksize(int argc,char * argv[])977 setblocksize(int argc, char *argv[])
978 {
979
980 if (!options_rfc_enabled)
981 printf("RFC2347 style options are not enabled "
982 "(but proceeding anyway)\n");
983
984 if (argc != 1) {
985 int size = atoi(argv[1]);
986 size_t max;
987 u_long maxdgram;
988
989 max = sizeof(maxdgram);
990 if (sysctlbyname("net.inet.udp.maxdgram",
991 &maxdgram, &max, NULL, 0) < 0) {
992 perror("sysctl: net.inet.udp.maxdgram");
993 return;
994 }
995
996 if (size < BLKSIZE_MIN || size > BLKSIZE_MAX) {
997 printf("Blocksize should be between %d and %d bytes.\n",
998 BLKSIZE_MIN, BLKSIZE_MAX);
999 return;
1000 } else if (size > (int)maxdgram - 4) {
1001 printf("Blocksize can't be bigger than %ld bytes due "
1002 "to the net.inet.udp.maxdgram sysctl limitation.\n",
1003 maxdgram - 4);
1004 options_set_request(OPT_BLKSIZE, "%ld", maxdgram - 4);
1005 } else {
1006 options_set_request(OPT_BLKSIZE, "%d", size);
1007 }
1008 }
1009 printf("Blocksize is now %s bytes.\n", options[OPT_BLKSIZE].o_request);
1010 }
1011
1012 static void
setblocksize2(int argc,char * argv[])1013 setblocksize2(int argc, char *argv[])
1014 {
1015
1016 if (!options_rfc_enabled || !options_extra_enabled)
1017 printf(
1018 "RFC2347 style or non-RFC defined options are not enabled "
1019 "(but proceeding anyway)\n");
1020
1021 if (argc != 1) {
1022 int size = atoi(argv[1]);
1023 int i;
1024 size_t max;
1025 u_long maxdgram;
1026
1027 int sizes[] = {
1028 8, 16, 32, 64, 128, 256, 512, 1024,
1029 2048, 4096, 8192, 16384, 32768, 0
1030 };
1031
1032 max = sizeof(maxdgram);
1033 if (sysctlbyname("net.inet.udp.maxdgram",
1034 &maxdgram, &max, NULL, 0) < 0) {
1035 perror("sysctl: net.inet.udp.maxdgram");
1036 return;
1037 }
1038
1039 for (i = 0; sizes[i] != 0; i++) {
1040 if (sizes[i] == size) break;
1041 }
1042 if (sizes[i] == 0) {
1043 printf("Blocksize2 should be a power of two between "
1044 "8 and 32768.\n");
1045 return;
1046 }
1047
1048 if (size < BLKSIZE_MIN || size > BLKSIZE_MAX) {
1049 printf("Blocksize2 should be between "
1050 "%d and %d bytes.\n", BLKSIZE_MIN, BLKSIZE_MAX);
1051 return;
1052 } else if (size > (int)maxdgram - 4) {
1053 printf("Blocksize2 can't be bigger than %ld bytes due "
1054 "to the net.inet.udp.maxdgram sysctl limitation.\n",
1055 maxdgram - 4);
1056 for (i = 0; sizes[i+1] != 0; i++) {
1057 if ((int)maxdgram < sizes[i+1]) break;
1058 }
1059 options_set_request(OPT_BLKSIZE2, "%d", sizes[i]);
1060 } else {
1061 options_set_request(OPT_BLKSIZE2, "%d", size);
1062 }
1063 }
1064 printf("Blocksize2 is now %s bytes.\n",
1065 options[OPT_BLKSIZE2].o_request);
1066 }
1067
1068 static void
setpacketdrop(int argc,char * argv[])1069 setpacketdrop(int argc, char *argv[])
1070 {
1071
1072 if (argc != 1)
1073 packetdroppercentage = atoi(argv[1]);
1074
1075 printf("Randomly %d in 100 packets will be dropped\n",
1076 packetdroppercentage);
1077 }
1078
1079 static void
setwindowsize(int argc,char * argv[])1080 setwindowsize(int argc, char *argv[])
1081 {
1082
1083 if (!options_rfc_enabled)
1084 printf("RFC2347 style options are not enabled "
1085 "(but proceeding anyway)\n");
1086
1087 if (argc != 1) {
1088 int size = atoi(argv[1]);
1089
1090 if (size < WINDOWSIZE_MIN || size > WINDOWSIZE_MAX) {
1091 printf("Windowsize should be between %d and %d "
1092 "blocks.\n", WINDOWSIZE_MIN, WINDOWSIZE_MAX);
1093 return;
1094 } else {
1095 options_set_request(OPT_WINDOWSIZE, "%d", size);
1096 }
1097 }
1098 printf("Windowsize is now %s blocks.\n",
1099 options[OPT_WINDOWSIZE].o_request);
1100 }
1101