2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
33 static const char copyright[] =
34 "@(#) Copyright (c) 1983, 1993\n\
35 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
47 /* Many bug fixes are from Jim Guyton <guyton@rand-unix> */
50 * TFTP User Program -- Command Interface.
52 #include <sys/param.h>
53 #include <sys/types.h>
54 #include <sys/socket.h>
55 #include <sys/sysctl.h>
59 #include <netinet/in.h>
60 #include <arpa/inet.h>
61 #include <arpa/tftp.h>
74 #include "tftp-utils.h"
76 #include "tftp-options.h"
79 #define MAXLINE (2 * MAXPATHLEN)
80 #define TIMEOUT 5 /* secs between rexmt's */
82 typedef struct sockaddr_storage peeraddr;
85 static jmp_buf toplevel;
86 volatile int txrx_error;
91 static char *margv[MAX_MARGV];
94 static char *port = NULL;
96 static void get(int, char **);
97 static void help(int, char **);
98 static void intr(int);
99 static void modecmd(int, char **);
100 static void put(int, char **);
101 static void quit(int, char **);
102 static void setascii(int, char **);
103 static void setbinary(int, char **);
104 static void setpeer0(char *, const char *);
105 static void setpeer(int, char **);
106 static void settimeoutpacket(int, char **);
107 static void settimeoutnetwork(int, char **);
108 static void setdebug(int, char **);
109 static void setverbose(int, char **);
110 static void showstatus(int, char **);
111 static void setblocksize(int, char **);
112 static void setblocksize2(int, char **);
113 static void setoptions(int, char **);
114 static void setrollover(int, char **);
115 static void setpacketdrop(int, char **);
117 static void command(void) __dead2;
118 static const char *command_prompt(void);
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 *);
126 static char *tail(char *);
127 static struct cmd *getcmd(char *);
129 #define HELPINDENT (sizeof("connect"))
133 void (*handler)(int, char **);
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 { "?", help, "print help information" },
164 static struct modes {
168 { "ascii", "netascii" },
169 { "netascii", "netascii" },
170 { "binary", "octet" },
171 { "image", "octet" },
172 { "octet", "octet" },
177 main(int argc, char *argv[])
180 acting_as_client = 1;
182 strcpy(mode, "netascii");
183 signal(SIGINT, intr);
185 if (setjmp(toplevel) != 0)
188 if (strncmp(argv[1], "tftp://", 7) == 0) {
189 urihandling(argv[1]);
195 if (setjmp(toplevel) != 0)
203 * RFC3617 handling of TFTP URIs:
205 * tftpURI = "tftp://" host "/" file [ mode ]
206 * mode = ";" "mode=" ( "netascii" / "octet" )
207 * file = *( unreserved / escaped )
208 * host = <as specified by RFC 2732>
209 * unreserved = <as specified in RFC 2396>
210 * escaped = <as specified in RFC 2396>
212 * We are cheating a little bit by allowing any mode as specified in the
213 * modes table defined earlier on in this file and mapping it on the real
217 urihandling(char *URI)
223 const char *tmode = "octet";
228 strlcpy(uri, URI, ARG_MAX);
231 if ((s = strchr(host, '/')) == NULL) {
233 "Invalid URI: Couldn't find / after hostname\n");
239 if ((s = strchr(path, ';')) != NULL) {
243 if (strncmp(opts, "mode=", 5) == 0) {
247 for (i = 0; modes[i].m_name != NULL; i++) {
248 if (strcmp(modes[i].m_name, tmode) == 0)
251 if (modes[i].m_name == NULL) {
252 fprintf(stderr, "Invalid mode: '%s'\n", mode);
255 settftpmode(modes[i].m_mode);
258 settftpmode("octet");
261 setpeer0(host, NULL);
263 sprintf(line, "get %s", path);
268 static char hostname[MAXHOSTNAMELEN];
271 setpeer0(char *host, const char *lport)
273 struct addrinfo hints, *res0, *res;
275 const char *cause = "unknown";
283 memset(&hints, 0, sizeof(hints));
284 hints.ai_family = PF_UNSPEC;
285 hints.ai_socktype = SOCK_DGRAM;
286 hints.ai_protocol = IPPROTO_UDP;
287 hints.ai_flags = AI_CANONNAME;
290 error = getaddrinfo(host, lport, &hints, &res0);
292 warnx("%s", gai_strerror(error));
296 for (res = res0; res; res = res->ai_next) {
297 if (res->ai_addrlen > sizeof(peeraddr))
299 peer = socket(res->ai_family, res->ai_socktype,
306 memset(&peer_sock, 0, sizeof(peer_sock));
307 peer_sock.ss_family = res->ai_family;
308 peer_sock.ss_len = res->ai_addrlen;
309 if (bind(peer, (struct sockaddr *)&peer_sock, peer_sock.ss_len) < 0) {
322 /* res->ai_addr <= sizeof(peeraddr) is guaranteed */
323 memcpy(&peer_sock, res->ai_addr, res->ai_addrlen);
324 if (res->ai_canonname) {
325 (void) strlcpy(hostname, res->ai_canonname,
328 (void) strlcpy(hostname, host, sizeof(hostname));
336 setpeer(int argc, char *argv[])
341 strcpy(line, "Connect ");
343 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
348 if ((argc < 2) || (argc > 3)) {
349 printf("usage: %s [host [port]]\n", argv[0]);
354 setpeer0(argv[1], argv[2]);
356 setpeer0(argv[1], NULL);
360 modecmd(int argc, char *argv[])
366 printf("Using %s mode to transfer files.\n", mode);
370 for (p = modes; p->m_name; p++)
371 if (strcmp(argv[1], p->m_name) == 0)
374 settftpmode(p->m_mode);
377 printf("%s: unknown mode\n", argv[1]);
378 /* drop through and print usage message */
381 printf("usage: %s [", argv[0]);
383 for (p = modes; p->m_name != NULL; p++) {
384 printf("%s%s", sep, p->m_name);
393 setbinary(int argc __unused, char *argv[] __unused)
396 settftpmode("octet");
400 setascii(int argc __unused, char *argv[] __unused)
403 settftpmode("netascii");
407 settftpmode(const char *newmode)
410 strcpy(mode, newmode);
412 printf("mode set to %s\n", mode);
420 put(int argc, char *argv[])
429 strcpy(line, "send ");
431 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
440 targ = argv[argc - 1];
441 if (strrchr(argv[argc - 1], ':')) {
444 for (n = 1; n < argc - 1; n++)
445 if (strchr(argv[n], ':')) {
449 lcp = argv[argc - 1];
450 targ = strrchr(lcp, ':');
452 if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
453 lcp[strlen(lcp) - 1] = '\0';
459 printf("No target machine specified.\n");
463 cp = argc == 2 ? tail(targ) : argv[1];
464 fd = open(cp, O_RDONLY);
471 asprintf(&options[OPT_TSIZE].o_request, "%ju", sb.st_size);
474 printf("putting %s to %s:%s [%s]\n",
475 cp, hostname, targ, mode);
476 xmitfile(peer, port, fd, targ, mode);
479 /* this assumes the target is a directory */
480 /* on a remote unix system. hmmmm. */
481 cp = strchr(targ, '\0');
483 for (n = 1; n < argc - 1; n++) {
484 strcpy(cp, tail(argv[n]));
485 fd = open(argv[n], O_RDONLY);
492 asprintf(&options[OPT_TSIZE].o_request, "%ju", sb.st_size);
495 printf("putting %s to %s:%s [%s]\n",
496 argv[n], hostname, targ, mode);
497 xmitfile(peer, port, fd, targ, mode);
505 printf("usage: %s file [remotename]\n", s);
506 printf(" %s file host:remotename\n", s);
507 printf(" %s file1 file2 ... fileN [[host:]remote-directory]\n", s);
514 get(int argc, char *argv[])
523 strcpy(line, "get ");
525 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
535 for (n = 1; n < argc ; n++)
536 if (strrchr(argv[n], ':') == 0) {
537 printf("No remote host specified and "
538 "no host given for file '%s'\n", argv[n]);
543 for (n = 1; n < argc ; n++) {
544 src = strrchr(argv[n], ':');
552 if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
553 lcp[strlen(lcp) - 1] = '\0';
561 cp = argc == 3 ? argv[2] : tail(src);
562 fd = creat(cp, 0644);
568 printf("getting from %s:%s to %s [%s]\n",
569 hostname, src, cp, mode);
570 recvfile(peer, port, fd, src, mode);
573 cp = tail(src); /* new .. jdg */
574 fd = creat(cp, 0644);
580 printf("getting from %s:%s to %s [%s]\n",
581 hostname, src, cp, mode);
582 recvfile(peer, port, fd, src, mode);
590 printf("usage: %s file [localname]\n", s);
591 printf(" %s [host:]file [localname]\n", s);
592 printf(" %s [host1:]file1 [host2:]file2 ... [hostN:]fileN\n", s);
596 settimeoutpacket(int argc, char *argv[])
602 strcpy(line, "Packet timeout ");
604 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
610 printf("usage: %s value\n", argv[0]);
615 printf("%s: bad value\n", argv[1]);
619 settimeouts(t, timeoutnetwork, maxtimeouts);
623 settimeoutnetwork(int argc, char *argv[])
629 strcpy(line, "Network timeout ");
631 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
637 printf("usage: %s value\n", argv[0]);
642 printf("%s: bad value\n", argv[1]);
646 settimeouts(timeoutpacket, t, maxtimeouts);
650 showstatus(int argc __unused, char *argv[] __unused)
653 printf("Remote host: %s\n",
654 connected ? hostname : "none specified yet");
655 printf("RFC2347 Options support: %s\n",
656 options_rfc_enabled ? "enabled" : "disabled");
657 printf("Non-RFC defined options support: %s\n",
658 options_extra_enabled ? "enabled" : "disabled");
659 printf("Mode: %s\n", mode);
660 printf("Verbose: %s\n", verbose ? "on" : "off");
661 printf("Debug: %s\n", debug_show(debug));
662 printf("Artificial packetloss: %d in 100 packets\n",
663 packetdroppercentage);
664 printf("Segment size: %d bytes\n", segsize);
665 printf("Network timeout: %d seconds\n", timeoutpacket);
666 printf("Maximum network timeout: %d seconds\n", timeoutnetwork);
667 printf("Maximum timeouts: %d \n", maxtimeouts);
671 intr(int dummy __unused)
674 signal(SIGALRM, SIG_IGN);
676 longjmp(toplevel, -1);
685 s = strrchr(filename, '/');
711 static History *hist;
714 int len, num, vrbose;
719 el = el_init("tftp", stdin, stdout, stderr);
720 hist = history_init();
721 history(hist, &he, H_SETSIZE, 100);
722 el_set(el, EL_HIST, history, hist);
723 el_set(el, EL_EDITOR, "emacs");
724 el_set(el, EL_PROMPT, command_prompt);
725 el_set(el, EL_SIGNAL, 1);
730 if ((bp = el_gets(el, &num)) == NULL || num == 0)
732 len = MIN(MAXLINE, num);
733 memcpy(line, bp, len);
735 history(hist, &he, H_ENTER, bp);
738 if (fgets(line, sizeof line , stdin) == NULL) {
746 if ((cp = strchr(line, '\n')))
753 c = getcmd(margv[0]);
754 if (c == (struct cmd *)-1) {
755 printf("?Ambiguous command\n");
759 printf("?Invalid command\n");
762 (*c->handler)(margc, margv);
770 struct cmd *c, *found;
771 int nmatches, longest;
776 for (c = cmdtab; (p = c->name) != NULL; c++) {
777 for (q = name; *q == *p++; q++)
778 if (*q == 0) /* exact match? */
780 if (!*q) { /* the name was a prefix */
781 if (q - name > longest) {
785 } else if (q - name == longest)
790 return ((struct cmd *)-1);
795 * Slice a string up into argc/argv.
804 if ((cp = strchr(line, '\n')) != NULL)
806 for (cp = line; margc < MAX_MARGV - 1 && *cp != '\0';) {
813 while (*cp != '\0' && !isspace(*cp))
823 quit(int argc __unused, char *argv[] __unused)
833 help(int argc, char *argv[])
838 printf("Commands may be abbreviated. Commands are:\n\n");
839 for (c = cmdtab; c->name; c++)
840 printf("%-*s\t%s\n", (int)HELPINDENT, c->name, c->help);
842 printf("\n[-] : You shouldn't use these ones anymore.\n");
843 printf("[*] : RFC2347 options support required.\n");
844 printf("[**] : Non-standard RFC2347 option.\n");
851 if (c == (struct cmd *)-1)
852 printf("?Ambiguous help command: %s\n", arg);
853 else if (c == (struct cmd *)0)
854 printf("?Invalid help command: %s\n", arg);
856 printf("%s\n", c->help);
861 setverbose(int argc __unused, char *argv[] __unused)
865 printf("Verbose mode %s.\n", verbose ? "on" : "off");
869 setoptions(int argc, char *argv[])
873 if (strcasecmp(argv[1], "enable") == 0 ||
874 strcasecmp(argv[1], "on") == 0) {
875 options_extra_enabled = 1;
876 options_rfc_enabled = 1;
878 if (strcasecmp(argv[1], "disable") == 0 ||
879 strcasecmp(argv[1], "off") == 0) {
880 options_extra_enabled = 0;
881 options_rfc_enabled = 0;
883 if (strcasecmp(argv[1], "extra") == 0)
884 options_extra_enabled = !options_extra_enabled;
886 printf("Support for RFC2347 style options are now %s.\n",
887 options_rfc_enabled ? "enabled" : "disabled");
888 printf("Support for non-RFC defined options are now %s.\n",
889 options_extra_enabled ? "enabled" : "disabled");
891 printf("\nThe following options are available:\n"
892 "\toptions on : enable support for RFC2347 style options\n"
893 "\toptions off : disable support for RFC2347 style options\n"
894 "\toptions extra : toggle support for non-RFC defined options\n"
899 setrollover(int argc, char *argv[])
903 if (strcasecmp(argv[1], "never") == 0 ||
904 strcasecmp(argv[1], "none") == 0) {
905 free(options[OPT_ROLLOVER].o_request);
906 options[OPT_ROLLOVER].o_request = NULL;
908 if (strcasecmp(argv[1], "1") == 0) {
909 free(options[OPT_ROLLOVER].o_request);
910 options[OPT_ROLLOVER].o_request = strdup("1");
912 if (strcasecmp(argv[1], "0") == 0) {
913 free(options[OPT_ROLLOVER].o_request);
914 options[OPT_ROLLOVER].o_request = strdup("0");
917 printf("Support for the rollover options is %s.\n",
918 options[OPT_ROLLOVER].o_request != NULL ? "enabled" : "disabled");
919 if (options[OPT_ROLLOVER].o_request != NULL)
920 printf("Block rollover will be to block %s.\n",
921 options[OPT_ROLLOVER].o_request);
924 printf("\nThe following rollover options are available:\n"
925 "\trollover 0 : rollover to block zero (default)\n"
926 "\trollover 1 : rollover to block one\n"
927 "\trollover never : do not support the rollover option\n"
928 "\trollover none : do not support the rollover option\n"
933 setdebug(int argc, char *argv[])
940 debug ^= debug_find(argv[i++]);
942 printf("The following debugging is enabled: %s\n", debug_show(debug));
944 printf("\nThe following debugs are available:\n");
946 while (debugs[i].name != NULL) {
947 printf("\t%s\t%s\n", debugs[i].name, debugs[i].desc);
953 setblocksize(int argc, char *argv[])
956 if (!options_rfc_enabled)
957 printf("RFC2347 style options are not enabled "
958 "(but proceeding anyway)\n");
961 int size = atoi(argv[1]);
965 max = sizeof(maxdgram);
966 if (sysctlbyname("net.inet.udp.maxdgram",
967 &maxdgram, &max, NULL, 0) < 0) {
968 perror("sysctl: net.inet.udp.maxdgram");
972 if (size < BLKSIZE_MIN || size > BLKSIZE_MAX) {
973 printf("Blocksize should be between %d and %d bytes.\n",
974 BLKSIZE_MIN, BLKSIZE_MAX);
976 } else if (size > (int)maxdgram - 4) {
977 printf("Blocksize can't be bigger than %ld bytes due "
978 "to the net.inet.udp.maxdgram sysctl limitation.\n",
980 asprintf(&options[OPT_BLKSIZE].o_request,
981 "%ld", maxdgram - 4);
983 asprintf(&options[OPT_BLKSIZE].o_request, "%d", size);
986 printf("Blocksize is now %s bytes.\n", options[OPT_BLKSIZE].o_request);
990 setblocksize2(int argc, char *argv[])
993 if (!options_rfc_enabled || !options_extra_enabled)
995 "RFC2347 style or non-RFC defined options are not enabled "
996 "(but proceeding anyway)\n");
999 int size = atoi(argv[1]);
1005 8, 16, 32, 64, 128, 256, 512, 1024,
1006 2048, 4096, 8192, 16384, 32768, 0
1009 max = sizeof(maxdgram);
1010 if (sysctlbyname("net.inet.udp.maxdgram",
1011 &maxdgram, &max, NULL, 0) < 0) {
1012 perror("sysctl: net.inet.udp.maxdgram");
1016 for (i = 0; sizes[i] != 0; i++) {
1017 if (sizes[i] == size) break;
1019 if (sizes[i] == 0) {
1020 printf("Blocksize2 should be a power of two between "
1025 if (size < BLKSIZE_MIN || size > BLKSIZE_MAX) {
1026 printf("Blocksize2 should be between "
1027 "%d and %d bytes.\n", BLKSIZE_MIN, BLKSIZE_MAX);
1029 } else if (size > (int)maxdgram - 4) {
1030 printf("Blocksize2 can't be bigger than %ld bytes due "
1031 "to the net.inet.udp.maxdgram sysctl limitation.\n",
1033 for (i = 0; sizes[i+1] != 0; i++) {
1034 if ((int)maxdgram < sizes[i+1]) break;
1036 asprintf(&options[OPT_BLKSIZE2].o_request,
1039 asprintf(&options[OPT_BLKSIZE2].o_request, "%d", size);
1042 printf("Blocksize2 is now %s bytes.\n",
1043 options[OPT_BLKSIZE2].o_request);
1047 setpacketdrop(int argc, char *argv[])
1051 packetdroppercentage = atoi(argv[1]);
1053 printf("Randomly %d in 100 packets will be dropped\n",
1054 packetdroppercentage);