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>
75 #include "tftp-utils.h"
77 #include "tftp-options.h"
80 #define MAXLINE (2 * MAXPATHLEN)
81 #define TIMEOUT 5 /* secs between rexmt's */
83 typedef struct sockaddr_storage peeraddr;
86 static jmp_buf toplevel;
87 volatile int txrx_error;
92 static char *margv[MAX_MARGV];
95 static char *port = NULL;
97 static void get(int, char **);
98 static void help(int, char **);
99 static void intr(int);
100 static void modecmd(int, char **);
101 static void put(int, char **);
102 static void quit(int, char **);
103 static void setascii(int, char **);
104 static void setbinary(int, char **);
105 static void setpeer0(char *, const char *);
106 static void setpeer(int, char **);
107 static void settimeoutpacket(int, char **);
108 static void settimeoutnetwork(int, char **);
109 static void setdebug(int, char **);
110 static void setverbose(int, char **);
111 static void showstatus(int, char **);
112 static void setblocksize(int, char **);
113 static void setblocksize2(int, char **);
114 static void setoptions(int, char **);
115 static void setrollover(int, char **);
116 static void setpacketdrop(int, char **);
118 static void command(bool, EditLine *, History *, HistEvent *) __dead2;
119 static const char *command_prompt(void);
121 static void urihandling(char *URI);
122 static void getusage(char *);
123 static void makeargv(char *line);
124 static void putusage(char *);
125 static void settftpmode(const char *);
127 static char *tail(char *);
128 static struct cmd *getcmd(char *);
130 #define HELPINDENT (sizeof("connect"))
134 void (*handler)(int, char **);
138 static struct cmd cmdtab[] = {
139 { "connect", setpeer, "connect to remote tftp" },
140 { "mode", modecmd, "set file transfer mode" },
141 { "put", put, "send file" },
142 { "get", get, "receive file" },
143 { "quit", quit, "exit tftp" },
144 { "verbose", setverbose, "toggle verbose mode" },
145 { "status", showstatus, "show current status" },
146 { "binary", setbinary, "set mode to octet" },
147 { "ascii", setascii, "set mode to netascii" },
148 { "rexmt", settimeoutpacket,
149 "set per-packet retransmission timeout[-]" },
150 { "timeout", settimeoutnetwork,
151 "set total retransmission timeout" },
152 { "trace", setdebug, "enable 'debug packet'[-]" },
153 { "debug", setdebug, "enable verbose output" },
154 { "blocksize", setblocksize, "set blocksize[*]" },
155 { "blocksize2", setblocksize2, "set blocksize as a power of 2[**]" },
156 { "rollover", setrollover, "rollover after 64K packets[**]" },
157 { "options", setoptions,
158 "enable or disable RFC2347 style options" },
159 { "help", help, "print help information" },
160 { "packetdrop", setpacketdrop, "artificial packetloss feature" },
161 { "?", help, "print help information" },
165 static struct modes {
169 { "ascii", "netascii" },
170 { "netascii", "netascii" },
171 { "binary", "octet" },
172 { "image", "octet" },
173 { "octet", "octet" },
178 main(int argc, char *argv[])
182 static History *hist;
185 acting_as_client = 1;
187 strcpy(mode, "octet");
188 signal(SIGINT, intr);
190 interactive = isatty(STDIN_FILENO);
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);
203 if (setjmp(toplevel) != 0)
206 if (strncmp(argv[1], "tftp://", 7) == 0) {
207 urihandling(argv[1]);
214 if (setjmp(toplevel) != 0) {
221 command(interactive, el, hist, &he);
225 * RFC3617 handling of TFTP URIs:
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>
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
239 urihandling(char *URI)
245 const char *tmode = "octet";
250 strlcpy(uri, URI, ARG_MAX);
253 if ((s = strchr(host, '/')) == NULL) {
255 "Invalid URI: Couldn't find / after hostname\n");
261 if ((s = strchr(path, ';')) != NULL) {
265 if (strncmp(opts, "mode=", 5) == 0) {
269 for (i = 0; modes[i].m_name != NULL; i++) {
270 if (strcmp(modes[i].m_name, tmode) == 0)
273 if (modes[i].m_name == NULL) {
274 fprintf(stderr, "Invalid mode: '%s'\n", mode);
277 settftpmode(modes[i].m_mode);
280 settftpmode("octet");
283 setpeer0(host, NULL);
285 sprintf(line, "get %s", path);
290 static char hostname[MAXHOSTNAMELEN];
293 setpeer0(char *host, const char *lport)
295 struct addrinfo hints, *res0, *res;
297 const char *cause = "unknown";
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;
312 error = getaddrinfo(host, lport, &hints, &res0);
314 warnx("%s", gai_strerror(error));
318 for (res = res0; res; res = res->ai_next) {
319 if (res->ai_addrlen > sizeof(peeraddr))
321 peer = socket(res->ai_family, res->ai_socktype,
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) {
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,
350 (void) strlcpy(hostname, host, sizeof(hostname));
358 setpeer(int argc, char *argv[])
363 strcpy(line, "Connect ");
365 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
370 if ((argc < 2) || (argc > 3)) {
371 printf("usage: %s [host [port]]\n", argv[0]);
376 setpeer0(argv[1], argv[2]);
378 setpeer0(argv[1], NULL);
382 modecmd(int argc, char *argv[])
388 printf("Using %s mode to transfer files.\n", mode);
392 for (p = modes; p->m_name; p++)
393 if (strcmp(argv[1], p->m_name) == 0)
396 settftpmode(p->m_mode);
399 printf("%s: unknown mode\n", argv[1]);
400 /* drop through and print usage message */
403 printf("usage: %s [", argv[0]);
405 for (p = modes; p->m_name != NULL; p++) {
406 printf("%s%s", sep, p->m_name);
415 setbinary(int argc __unused, char *argv[] __unused)
418 settftpmode("octet");
422 setascii(int argc __unused, char *argv[] __unused)
425 settftpmode("netascii");
429 settftpmode(const char *newmode)
432 strlcpy(mode, newmode, sizeof(mode));
434 printf("mode set to %s\n", mode);
442 put(int argc, char *argv[])
451 strcpy(line, "send ");
453 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
462 targ = argv[argc - 1];
463 if (strrchr(argv[argc - 1], ':')) {
466 for (n = 1; n < argc - 1; n++)
467 if (strchr(argv[n], ':')) {
471 lcp = argv[argc - 1];
472 targ = strrchr(lcp, ':');
474 if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
475 lcp[strlen(lcp) - 1] = '\0';
481 printf("No target machine specified.\n");
485 cp = argc == 2 ? tail(targ) : argv[1];
486 fd = open(cp, O_RDONLY);
492 if (fstat(fd, &sb) < 0) {
496 asprintf(&options[OPT_TSIZE].o_request, "%ju", sb.st_size);
499 printf("putting %s to %s:%s [%s]\n",
500 cp, hostname, targ, mode);
501 xmitfile(peer, port, fd, targ, mode);
505 /* this assumes the target is a directory */
506 /* on a remote unix system. hmmmm. */
507 cp = strchr(targ, '\0');
509 for (n = 1; n < argc - 1; n++) {
510 strcpy(cp, tail(argv[n]));
511 fd = open(argv[n], O_RDONLY);
517 if (fstat(fd, &sb) < 0) {
521 asprintf(&options[OPT_TSIZE].o_request, "%ju", sb.st_size);
524 printf("putting %s to %s:%s [%s]\n",
525 argv[n], hostname, targ, mode);
526 xmitfile(peer, port, fd, targ, mode);
534 printf("usage: %s file [remotename]\n", s);
535 printf(" %s file host:remotename\n", s);
536 printf(" %s file1 file2 ... fileN [[host:]remote-directory]\n", s);
543 get(int argc, char *argv[])
552 strcpy(line, "get ");
554 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
564 for (n = 1; n < argc ; n++)
565 if (strrchr(argv[n], ':') == 0) {
566 printf("No remote host specified and "
567 "no host given for file '%s'\n", argv[n]);
572 for (n = 1; n < argc ; n++) {
573 src = strrchr(argv[n], ':');
581 if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
582 lcp[strlen(lcp) - 1] = '\0';
590 cp = argc == 3 ? argv[2] : tail(src);
591 fd = creat(cp, 0644);
597 printf("getting from %s:%s to %s [%s]\n",
598 hostname, src, cp, mode);
599 recvfile(peer, port, fd, src, mode);
602 cp = tail(src); /* new .. jdg */
603 fd = creat(cp, 0644);
609 printf("getting from %s:%s to %s [%s]\n",
610 hostname, src, cp, mode);
611 recvfile(peer, port, fd, src, mode);
619 printf("usage: %s file [localname]\n", s);
620 printf(" %s [host:]file [localname]\n", s);
621 printf(" %s [host1:]file1 [host2:]file2 ... [hostN:]fileN\n", s);
625 settimeoutpacket(int argc, char *argv[])
631 strcpy(line, "Packet timeout ");
633 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
639 printf("usage: %s value\n", argv[0]);
644 printf("%s: bad value\n", argv[1]);
648 settimeouts(t, timeoutnetwork, maxtimeouts);
652 settimeoutnetwork(int argc, char *argv[])
658 strcpy(line, "Network timeout ");
660 fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
666 printf("usage: %s value\n", argv[0]);
671 printf("%s: bad value\n", argv[1]);
675 settimeouts(timeoutpacket, t, maxtimeouts);
679 showstatus(int argc __unused, char *argv[] __unused)
682 printf("Remote host: %s\n",
683 connected ? hostname : "none specified yet");
684 printf("RFC2347 Options support: %s\n",
685 options_rfc_enabled ? "enabled" : "disabled");
686 printf("Non-RFC defined options support: %s\n",
687 options_extra_enabled ? "enabled" : "disabled");
688 printf("Mode: %s\n", mode);
689 printf("Verbose: %s\n", verbose ? "on" : "off");
690 printf("Debug: %s\n", debug_show(debug));
691 printf("Artificial packetloss: %d in 100 packets\n",
692 packetdroppercentage);
693 printf("Segment size: %d bytes\n", segsize);
694 printf("Network timeout: %d seconds\n", timeoutpacket);
695 printf("Maximum network timeout: %d seconds\n", timeoutnetwork);
696 printf("Maximum timeouts: %d \n", maxtimeouts);
700 intr(int dummy __unused)
703 signal(SIGALRM, SIG_IGN);
705 longjmp(toplevel, -1);
714 s = strrchr(filename, '/');
735 command(bool interactive, EditLine *el, History *hist, HistEvent *hep)
745 if ((bp = el_gets(el, &num)) == NULL || num == 0)
747 len = MIN(MAXLINE, num);
748 memcpy(line, bp, len);
750 history(hist, hep, H_ENTER, bp);
753 if (fgets(line, sizeof line , stdin) == NULL) {
761 if ((cp = strchr(line, '\n')))
768 c = getcmd(margv[0]);
769 if (c == (struct cmd *)-1) {
770 printf("?Ambiguous command\n");
774 printf("?Invalid command\n");
777 (*c->handler)(margc, margv);
785 struct cmd *c, *found;
786 int nmatches, longest;
791 for (c = cmdtab; (p = c->name) != NULL; c++) {
792 for (q = name; *q == *p++; q++)
793 if (*q == 0) /* exact match? */
795 if (!*q) { /* the name was a prefix */
796 if (q - name > longest) {
800 } else if (q - name == longest)
805 return ((struct cmd *)-1);
810 * Slice a string up into argc/argv.
819 if ((cp = strchr(line, '\n')) != NULL)
821 for (cp = line; margc < MAX_MARGV - 1 && *cp != '\0';) {
828 while (*cp != '\0' && !isspace(*cp))
838 quit(int argc __unused, char *argv[] __unused)
848 help(int argc, char *argv[])
853 printf("Commands may be abbreviated. Commands are:\n\n");
854 for (c = cmdtab; c->name; c++)
855 printf("%-*s\t%s\n", (int)HELPINDENT, c->name, c->help);
857 printf("\n[-] : You shouldn't use these ones anymore.\n");
858 printf("[*] : RFC2347 options support required.\n");
859 printf("[**] : Non-standard RFC2347 option.\n");
866 if (c == (struct cmd *)-1)
867 printf("?Ambiguous help command: %s\n", arg);
868 else if (c == (struct cmd *)0)
869 printf("?Invalid help command: %s\n", arg);
871 printf("%s\n", c->help);
876 setverbose(int argc __unused, char *argv[] __unused)
880 printf("Verbose mode %s.\n", verbose ? "on" : "off");
884 setoptions(int argc, char *argv[])
888 if (strcasecmp(argv[1], "enable") == 0 ||
889 strcasecmp(argv[1], "on") == 0) {
890 options_extra_enabled = 1;
891 options_rfc_enabled = 1;
893 if (strcasecmp(argv[1], "disable") == 0 ||
894 strcasecmp(argv[1], "off") == 0) {
895 options_extra_enabled = 0;
896 options_rfc_enabled = 0;
898 if (strcasecmp(argv[1], "extra") == 0)
899 options_extra_enabled = !options_extra_enabled;
901 printf("Support for RFC2347 style options are now %s.\n",
902 options_rfc_enabled ? "enabled" : "disabled");
903 printf("Support for non-RFC defined options are now %s.\n",
904 options_extra_enabled ? "enabled" : "disabled");
906 printf("\nThe following options are available:\n"
907 "\toptions on : enable support for RFC2347 style options\n"
908 "\toptions off : disable support for RFC2347 style options\n"
909 "\toptions extra : toggle support for non-RFC defined options\n"
914 setrollover(int argc, char *argv[])
918 if (strcasecmp(argv[1], "never") == 0 ||
919 strcasecmp(argv[1], "none") == 0) {
920 free(options[OPT_ROLLOVER].o_request);
921 options[OPT_ROLLOVER].o_request = NULL;
923 if (strcasecmp(argv[1], "1") == 0) {
924 free(options[OPT_ROLLOVER].o_request);
925 options[OPT_ROLLOVER].o_request = strdup("1");
927 if (strcasecmp(argv[1], "0") == 0) {
928 free(options[OPT_ROLLOVER].o_request);
929 options[OPT_ROLLOVER].o_request = strdup("0");
932 printf("Support for the rollover options is %s.\n",
933 options[OPT_ROLLOVER].o_request != NULL ? "enabled" : "disabled");
934 if (options[OPT_ROLLOVER].o_request != NULL)
935 printf("Block rollover will be to block %s.\n",
936 options[OPT_ROLLOVER].o_request);
939 printf("\nThe following rollover options are available:\n"
940 "\trollover 0 : rollover to block zero (default)\n"
941 "\trollover 1 : rollover to block one\n"
942 "\trollover never : do not support the rollover option\n"
943 "\trollover none : do not support the rollover option\n"
948 setdebug(int argc, char *argv[])
955 debug ^= debug_find(argv[i++]);
957 printf("The following debugging is enabled: %s\n", debug_show(debug));
959 printf("\nThe following debugs are available:\n");
961 while (debugs[i].name != NULL) {
962 printf("\t%s\t%s\n", debugs[i].name, debugs[i].desc);
968 setblocksize(int argc, char *argv[])
971 if (!options_rfc_enabled)
972 printf("RFC2347 style options are not enabled "
973 "(but proceeding anyway)\n");
976 int size = atoi(argv[1]);
980 max = sizeof(maxdgram);
981 if (sysctlbyname("net.inet.udp.maxdgram",
982 &maxdgram, &max, NULL, 0) < 0) {
983 perror("sysctl: net.inet.udp.maxdgram");
987 if (size < BLKSIZE_MIN || size > BLKSIZE_MAX) {
988 printf("Blocksize should be between %d and %d bytes.\n",
989 BLKSIZE_MIN, BLKSIZE_MAX);
991 } else if (size > (int)maxdgram - 4) {
992 printf("Blocksize can't be bigger than %ld bytes due "
993 "to the net.inet.udp.maxdgram sysctl limitation.\n",
995 asprintf(&options[OPT_BLKSIZE].o_request,
996 "%ld", maxdgram - 4);
998 asprintf(&options[OPT_BLKSIZE].o_request, "%d", size);
1001 printf("Blocksize is now %s bytes.\n", options[OPT_BLKSIZE].o_request);
1005 setblocksize2(int argc, char *argv[])
1008 if (!options_rfc_enabled || !options_extra_enabled)
1010 "RFC2347 style or non-RFC defined options are not enabled "
1011 "(but proceeding anyway)\n");
1014 int size = atoi(argv[1]);
1020 8, 16, 32, 64, 128, 256, 512, 1024,
1021 2048, 4096, 8192, 16384, 32768, 0
1024 max = sizeof(maxdgram);
1025 if (sysctlbyname("net.inet.udp.maxdgram",
1026 &maxdgram, &max, NULL, 0) < 0) {
1027 perror("sysctl: net.inet.udp.maxdgram");
1031 for (i = 0; sizes[i] != 0; i++) {
1032 if (sizes[i] == size) break;
1034 if (sizes[i] == 0) {
1035 printf("Blocksize2 should be a power of two between "
1040 if (size < BLKSIZE_MIN || size > BLKSIZE_MAX) {
1041 printf("Blocksize2 should be between "
1042 "%d and %d bytes.\n", BLKSIZE_MIN, BLKSIZE_MAX);
1044 } else if (size > (int)maxdgram - 4) {
1045 printf("Blocksize2 can't be bigger than %ld bytes due "
1046 "to the net.inet.udp.maxdgram sysctl limitation.\n",
1048 for (i = 0; sizes[i+1] != 0; i++) {
1049 if ((int)maxdgram < sizes[i+1]) break;
1051 asprintf(&options[OPT_BLKSIZE2].o_request,
1054 asprintf(&options[OPT_BLKSIZE2].o_request, "%d", size);
1057 printf("Blocksize2 is now %s bytes.\n",
1058 options[OPT_BLKSIZE2].o_request);
1062 setpacketdrop(int argc, char *argv[])
1066 packetdroppercentage = atoi(argv[1]);
1068 printf("Randomly %d in 100 packets will be dropped\n",
1069 packetdroppercentage);