FreeBSD-5.3/usr.bin/tftp/main.c
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#if 0
#ifndef lint
static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/tftp/main.c,v 1.21 2003/10/12 00:27:55 tjr Exp $");
/* Many bug fixes are from Jim Guyton <guyton@rand-unix> */
/*
* TFTP User Program -- Command Interface.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <histedit.h>
#include <netdb.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
#define MAXLINE 200
#define TIMEOUT 5 /* secs between rexmt's */
struct sockaddr_storage peeraddr;
int f;
int trace;
int verbose;
int connected;
char mode[32];
char line[MAXLINE];
int margc;
#define MAX_MARGV 20
char *margv[MAX_MARGV];
jmp_buf toplevel;
volatile int txrx_error;
void get(int, char **);
void help(int, char **);
void intr(int);
void modecmd(int, char **);
void put(int, char **);
void quit(int, char **);
void setascii(int, char **);
void setbinary(int, char **);
void setpeer0(char *, const char *);
void setpeer(int, char **);
void setrexmt(int, char **);
void settimeout(int, char **);
void settrace(int, char **);
void setverbose(int, char **);
void status(int, char **);
static void command(void) __dead2;
static const char *command_prompt(void);
static void getusage(char *);
static void makeargv(void);
static void putusage(char *);
static void settftpmode(const char *);
char *tail(char *);
struct cmd *getcmd(char *);
#define HELPINDENT (sizeof("connect"))
struct cmd {
const char *name;
char *help;
void (*handler)(int, char **);
};
char vhelp[] = "toggle verbose mode";
char thelp[] = "toggle packet tracing";
char chelp[] = "connect to remote tftp";
char qhelp[] = "exit tftp";
char hhelp[] = "print help information";
char shelp[] = "send file";
char rhelp[] = "receive file";
char mhelp[] = "set file transfer mode";
char sthelp[] = "show current status";
char xhelp[] = "set per-packet retransmission timeout";
char ihelp[] = "set total retransmission timeout";
char ashelp[] = "set mode to netascii";
char bnhelp[] = "set mode to octet";
struct cmd cmdtab[] = {
{ "connect", chelp, setpeer },
{ "mode", mhelp, modecmd },
{ "put", shelp, put },
{ "get", rhelp, get },
{ "quit", qhelp, quit },
{ "verbose", vhelp, setverbose },
{ "trace", thelp, settrace },
{ "status", sthelp, status },
{ "binary", bnhelp, setbinary },
{ "ascii", ashelp, setascii },
{ "rexmt", xhelp, setrexmt },
{ "timeout", ihelp, settimeout },
{ "?", hhelp, help },
{ NULL, NULL, NULL }
};
int
main(argc, argv)
int argc;
char *argv[];
{
f = -1;
strcpy(mode, "netascii");
signal(SIGINT, intr);
if (argc > 1) {
if (setjmp(toplevel) != 0)
exit(txrx_error);
setpeer(argc, argv);
}
if (setjmp(toplevel) != 0)
(void)putchar('\n');
command();
}
char hostname[MAXHOSTNAMELEN];
void
setpeer0(host, port)
char *host;
const char *port;
{
struct addrinfo hints, *res0, *res;
int error;
struct sockaddr_storage ss;
const char *cause = "unknown";
if (connected) {
close(f);
f = -1;
}
connected = 0;
memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
hints.ai_flags = AI_CANONNAME;
if (!port)
port = "tftp";
error = getaddrinfo(host, port, &hints, &res0);
if (error) {
warnx("%s", gai_strerror(error));
return;
}
for (res = res0; res; res = res->ai_next) {
if (res->ai_addrlen > sizeof(peeraddr))
continue;
f = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (f < 0) {
cause = "socket";
continue;
}
memset(&ss, 0, sizeof(ss));
ss.ss_family = res->ai_family;
ss.ss_len = res->ai_addrlen;
if (bind(f, (struct sockaddr *)&ss, ss.ss_len) < 0) {
cause = "bind";
close(f);
f = -1;
continue;
}
break;
}
if (f < 0)
warn("%s", cause);
else {
/* res->ai_addr <= sizeof(peeraddr) is guaranteed */
memcpy(&peeraddr, res->ai_addr, res->ai_addrlen);
if (res->ai_canonname) {
(void) strncpy(hostname, res->ai_canonname,
sizeof(hostname));
} else
(void) strncpy(hostname, host, sizeof(hostname));
hostname[sizeof(hostname)-1] = 0;
connected = 1;
}
freeaddrinfo(res0);
}
void
setpeer(argc, argv)
int argc;
char *argv[];
{
if (argc < 2) {
strcpy(line, "Connect ");
printf("(to) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv();
argc = margc;
argv = margv;
}
if ((argc < 2) || (argc > 3)) {
printf("usage: %s [host [port]]\n", argv[0]);
return;
}
if (argc == 3)
setpeer0(argv[1], argv[2]);
else
setpeer0(argv[1], NULL);
}
struct modes {
const char *m_name;
const char *m_mode;
} modes[] = {
{ "ascii", "netascii" },
{ "netascii", "netascii" },
{ "binary", "octet" },
{ "image", "octet" },
{ "octet", "octet" },
/* { "mail", "mail" }, */
{ 0, 0 }
};
void
modecmd(argc, argv)
int argc;
char *argv[];
{
struct modes *p;
const char *sep;
if (argc < 2) {
printf("Using %s mode to transfer files.\n", mode);
return;
}
if (argc == 2) {
for (p = modes; p->m_name; p++)
if (strcmp(argv[1], p->m_name) == 0)
break;
if (p->m_name) {
settftpmode(p->m_mode);
return;
}
printf("%s: unknown mode\n", argv[1]);
/* drop through and print usage message */
}
printf("usage: %s [", argv[0]);
sep = " ";
for (p = modes; p->m_name; p++) {
printf("%s%s", sep, p->m_name);
if (*sep == ' ')
sep = " | ";
}
printf(" ]\n");
return;
}
void
setbinary(argc, argv)
int argc __unused;
char *argv[] __unused;
{
settftpmode("octet");
}
void
setascii(argc, argv)
int argc __unused;
char *argv[] __unused;
{
settftpmode("netascii");
}
static void
settftpmode(newmode)
const char *newmode;
{
strcpy(mode, newmode);
if (verbose)
printf("mode set to %s\n", mode);
}
/*
* Send file(s).
*/
void
put(argc, argv)
int argc;
char *argv[];
{
int fd;
int n;
char *cp, *targ;
if (argc < 2) {
strcpy(line, "send ");
printf("(file) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv();
argc = margc;
argv = margv;
}
if (argc < 2) {
putusage(argv[0]);
return;
}
targ = argv[argc - 1];
if (rindex(argv[argc - 1], ':')) {
char *lcp;
for (n = 1; n < argc - 1; n++)
if (index(argv[n], ':')) {
putusage(argv[0]);
return;
}
lcp = argv[argc - 1];
targ = rindex(lcp, ':');
*targ++ = 0;
if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
lcp[strlen(lcp) - 1] = '\0';
lcp++;
}
setpeer0(lcp, NULL);
}
if (!connected) {
printf("No target machine specified.\n");
return;
}
if (argc < 4) {
cp = argc == 2 ? tail(targ) : argv[1];
fd = open(cp, O_RDONLY);
if (fd < 0) {
warn("%s", cp);
return;
}
if (verbose)
printf("putting %s to %s:%s [%s]\n",
cp, hostname, targ, mode);
xmitfile(fd, targ, mode);
return;
}
/* this assumes the target is a directory */
/* on a remote unix system. hmmmm. */
cp = index(targ, '\0');
*cp++ = '/';
for (n = 1; n < argc - 1; n++) {
strcpy(cp, tail(argv[n]));
fd = open(argv[n], O_RDONLY);
if (fd < 0) {
warn("%s", argv[n]);
continue;
}
if (verbose)
printf("putting %s to %s:%s [%s]\n",
argv[n], hostname, targ, mode);
xmitfile(fd, targ, mode);
}
}
static void
putusage(s)
char *s;
{
printf("usage: %s file [[host:]remotename]\n", s);
printf(" %s file1 file2 ... fileN [[host:]remote-directory]\n", s);
}
/*
* Receive file(s).
*/
void
get(argc, argv)
int argc;
char *argv[];
{
int fd;
int n;
char *cp;
char *src;
if (argc < 2) {
strcpy(line, "get ");
printf("(files) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv();
argc = margc;
argv = margv;
}
if (argc < 2) {
getusage(argv[0]);
return;
}
if (!connected) {
for (n = 1; n < argc ; n++)
if (rindex(argv[n], ':') == 0) {
getusage(argv[0]);
return;
}
}
for (n = 1; n < argc ; n++) {
src = rindex(argv[n], ':');
if (src == NULL)
src = argv[n];
else {
char *lcp;
*src++ = 0;
lcp = argv[n];
if (lcp[0] == '[' && lcp[strlen(lcp) - 1] == ']') {
lcp[strlen(lcp) - 1] = '\0';
lcp++;
}
setpeer0(lcp, NULL);
if (!connected)
continue;
}
if (argc < 4) {
cp = argc == 3 ? argv[2] : tail(src);
fd = creat(cp, 0644);
if (fd < 0) {
warn("%s", cp);
return;
}
if (verbose)
printf("getting from %s:%s to %s [%s]\n",
hostname, src, cp, mode);
recvfile(fd, src, mode);
break;
}
cp = tail(src); /* new .. jdg */
fd = creat(cp, 0644);
if (fd < 0) {
warn("%s", cp);
continue;
}
if (verbose)
printf("getting from %s:%s to %s [%s]\n",
hostname, src, cp, mode);
recvfile(fd, src, mode);
}
}
static void
getusage(s)
char *s;
{
printf("usage: %s [host:]file [localname]\n", s);
printf(" %s [host1:]file1 [host2:]file2 ... [hostN:]fileN\n", s);
}
int rexmtval = TIMEOUT;
void
setrexmt(argc, argv)
int argc;
char *argv[];
{
int t;
if (argc < 2) {
strcpy(line, "Rexmt-timeout ");
printf("(value) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv();
argc = margc;
argv = margv;
}
if (argc != 2) {
printf("usage: %s value\n", argv[0]);
return;
}
t = atoi(argv[1]);
if (t < 0)
printf("%s: bad value\n", argv[1]);
else
rexmtval = t;
}
int maxtimeout = 5 * TIMEOUT;
void
settimeout(argc, argv)
int argc;
char *argv[];
{
int t;
if (argc < 2) {
strcpy(line, "Maximum-timeout ");
printf("(value) ");
fgets(&line[strlen(line)], sizeof line - strlen(line), stdin);
makeargv();
argc = margc;
argv = margv;
}
if (argc != 2) {
printf("usage: %s value\n", argv[0]);
return;
}
t = atoi(argv[1]);
if (t < 0)
printf("%s: bad value\n", argv[1]);
else
maxtimeout = t;
}
void
status(argc, argv)
int argc __unused;
char *argv[] __unused;
{
if (connected)
printf("Connected to %s.\n", hostname);
else
printf("Not connected.\n");
printf("Mode: %s Verbose: %s Tracing: %s\n", mode,
verbose ? "on" : "off", trace ? "on" : "off");
printf("Rexmt-interval: %d seconds, Max-timeout: %d seconds\n",
rexmtval, maxtimeout);
}
void
intr(dummy)
int dummy __unused;
{
signal(SIGALRM, SIG_IGN);
alarm(0);
longjmp(toplevel, -1);
}
char *
tail(filename)
char *filename;
{
char *s;
while (*filename) {
s = rindex(filename, '/');
if (s == NULL)
break;
if (s[1])
return (s + 1);
*s = '\0';
}
return (filename);
}
static const char *
command_prompt()
{
return ("tftp> ");
}
/*
* Command parser.
*/
static void
command()
{
HistEvent he;
struct cmd *c;
static EditLine *el;
static History *hist;
const char *bp;
char *cp;
int len, num, vrbose;
vrbose = isatty(0);
if (vrbose) {
el = el_init("tftp", stdin, stdout, stderr);
hist = history_init();
history(hist, &he, H_EVENT, 100);
el_set(el, EL_HIST, history, hist);
el_set(el, EL_EDITOR, "emacs");
el_set(el, EL_PROMPT, command_prompt);
el_set(el, EL_SIGNAL, 1);
el_source(el, NULL);
}
for (;;) {
if (vrbose) {
if ((bp = el_gets(el, &num)) == NULL || num == 0)
exit(0);
len = (num > MAXLINE) ? MAXLINE : num;
memcpy(line, bp, len);
line[len] = '\0';
history(hist, &he, H_ENTER, bp);
} else {
if (fgets(line, sizeof line , stdin) == 0) {
if (feof(stdin)) {
exit(txrx_error);
} else {
continue;
}
}
}
if ((cp = strchr(line, '\n')))
*cp = '\0';
if (line[0] == 0)
continue;
makeargv();
if (margc == 0)
continue;
c = getcmd(margv[0]);
if (c == (struct cmd *)-1) {
printf("?Ambiguous command\n");
continue;
}
if (c == 0) {
printf("?Invalid command\n");
continue;
}
(*c->handler)(margc, margv);
}
}
struct cmd *
getcmd(name)
char *name;
{
const char *p, *q;
struct cmd *c, *found;
int nmatches, longest;
longest = 0;
nmatches = 0;
found = 0;
for (c = cmdtab; (p = c->name) != NULL; c++) {
for (q = name; *q == *p++; q++)
if (*q == 0) /* exact match? */
return (c);
if (!*q) { /* the name was a prefix */
if (q - name > longest) {
longest = q - name;
nmatches = 1;
found = c;
} else if (q - name == longest)
nmatches++;
}
}
if (nmatches > 1)
return ((struct cmd *)-1);
return (found);
}
/*
* Slice a string up into argc/argv.
*/
static void
makeargv()
{
char *cp;
char **argp = margv;
margc = 0;
if ((cp = strchr(line, '\n')))
*cp = '\0';
for (cp = line; margc < MAX_MARGV - 1 && *cp;) {
while (isspace(*cp))
cp++;
if (*cp == '\0')
break;
*argp++ = cp;
margc += 1;
while (*cp != '\0' && !isspace(*cp))
cp++;
if (*cp == '\0')
break;
*cp++ = '\0';
}
*argp++ = 0;
}
void
quit(argc, argv)
int argc __unused;
char *argv[] __unused;
{
exit(txrx_error);
}
/*
* Help command.
*/
void
help(argc, argv)
int argc;
char *argv[];
{
struct cmd *c;
if (argc == 1) {
printf("Commands may be abbreviated. Commands are:\n\n");
for (c = cmdtab; c->name; c++)
printf("%-*s\t%s\n", (int)HELPINDENT, c->name, c->help);
return;
}
while (--argc > 0) {
char *arg;
arg = *++argv;
c = getcmd(arg);
if (c == (struct cmd *)-1)
printf("?Ambiguous help command %s\n", arg);
else if (c == (struct cmd *)0)
printf("?Invalid help command %s\n", arg);
else
printf("%s\n", c->help);
}
}
void
settrace(argc, argv)
int argc __unused;
char **argv __unused;
{
trace = !trace;
printf("Packet tracing %s.\n", trace ? "on" : "off");
}
void
setverbose(argc, argv)
int argc __unused;
char **argv __unused;
{
verbose = !verbose;
printf("Verbose mode %s.\n", verbose ? "on" : "off");
}