OpenBSD-4.6/usr.bin/tftp/main.c
/* $OpenBSD: main.c,v 1.29 2007/05/11 01:47:48 ray Exp $ */
/* $NetBSD: main.c,v 1.6 1995/05/21 16:54:10 mycroft Exp $ */
/*
* 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. 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 /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$OpenBSD: main.c,v 1.29 2007/05/11 01:47:48 ray Exp $";
#endif /* not lint */
/*
* TFTP User Program -- Command Interface
*
* This version includes many modifications by Jim Guyton <guyton@rand-unix>
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/tftp.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <poll.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
#define LBUFLEN 200 /* size of input buffer */
#define MAXARGV 20
#define HELPINDENT (sizeof("connect"))
void get(int, char **);
void help(int, char **);
void modecmd(int, char **);
void put(int, char **);
void quit(int, char **);
void setascii(int, char **);
void setbinary(int, char **);
void setpeer(int, char **);
void setrexmt(int, char **);
void settimeout(int, char **);
void settrace(int, char **);
void setverbose(int, char **);
void settsize(int, char **);
void settout(int, char **);
void setblksize(int, char **);
void status(int, char **);
int readcmd(char *, int, FILE *);
static void getusage(char *);
static int makeargv(void);
static void putusage(char *);
static void settftpmode(char *);
static __dead void command(void);
struct cmd *getcmd(char *);
char *tail(char *);
struct sockaddr_in peeraddr;
int f;
short port;
int trace;
int verbose;
int connected;
char mode[32];
char line[LBUFLEN];
int margc;
char *margv[MAXARGV+1];
char *prompt = "tftp";
void intr(int);
struct servent *sp;
int rexmtval = TIMEOUT;
int maxtimeout = 5 * TIMEOUT;
char hostname[MAXHOSTNAMELEN];
FILE *file = NULL;
volatile sig_atomic_t intrflag = 0;
char *ackbuf;
int has_options = 0;
int opt_tsize = 0;
int opt_tout = 0;
int opt_blksize = 0;
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";
char oshelp[] = "toggle tsize option";
char othelp[] = "toggle timeout option";
char obhelp[] = "set alternative blksize option";
struct cmd {
char *name;
char *help;
void (*handler)(int, char **);
};
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 },
{ "tsize", oshelp, settsize },
{ "tout", othelp, settout },
{ "blksize", obhelp, setblksize },
{ "help", hhelp, help },
{ "?", hhelp, help },
{ NULL, NULL, NULL }
};
struct modes {
char *m_name;
char *m_mode;
} modes[] = {
{ "ascii", "netascii" },
{ "netascii", "netascii" },
{ "binary", "octet" },
{ "image", "octet" },
{ "octet", "octet" },
/* { "mail", "mail" }, */
{ NULL, NULL }
};
int
main(int argc, char *argv[])
{
struct sockaddr_in s_in;
/* socket, bind */
sp = getservbyname("tftp", "udp");
if (sp == 0)
errx(1, "udp/tftp: unknown service");
f = socket(AF_INET, SOCK_DGRAM, 0);
if (f < 0)
err(3, "socket");
bzero((char *)&s_in, sizeof(s_in));
s_in.sin_family = AF_INET;
if (bind(f, (struct sockaddr *)&s_in, sizeof(s_in)) < 0)
err(1, "bind");
/* set default transfer mode */
strlcpy(mode, "netascii", sizeof(mode));
/* set peer if given */
if (argc > 1)
setpeer(argc, argv);
/* catch SIGINT */
signal(SIGINT, intr);
/* allocate memory for packets */
if ((ackbuf = malloc(SEGSIZE_MAX + 4)) == NULL)
err(1, "malloc");
/* command prompt */
command();
return (0);
}
void
setpeer(int argc, char *argv[])
{
struct hostent *host;
const char *errstr;
if (argc < 2) {
strlcpy(line, "Connect ", sizeof(line));
printf("(to) ");
readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
if (makeargv())
return;
argc = margc;
argv = margv;
}
if ((argc < 2) || (argc > 3)) {
printf("usage: %s [host [port]]\n", argv[0]);
return;
}
if (inet_aton(argv[1], &peeraddr.sin_addr) != 0) {
peeraddr.sin_family = AF_INET;
(void)strncpy(hostname, argv[1], sizeof(hostname));
hostname[sizeof(hostname) - 1] = '\0';
} else {
host = gethostbyname(argv[1]);
if (host == 0) {
connected = 0;
printf("%s: unknown host\n", argv[1]);
return;
}
peeraddr.sin_family = host->h_addrtype;
bcopy(host->h_addr, &peeraddr.sin_addr, host->h_length);
(void)strlcpy(hostname, host->h_name, sizeof(hostname));
}
port = sp->s_port;
if (argc == 3) {
port = strtonum(argv[2], 1, 65535, &errstr);
if (errstr) {
printf("%s: port number is %s\n", argv[2], errstr);
connected = 0;
return;
}
port = htons(port);
}
connected = 1;
}
void
modecmd(int argc, char *argv[])
{
struct modes *p;
char *sep;
if (argc < 2) {
printf("Using %s mode to transfer files.\n", mode);
return;
}
if (argc == 2) {
for (p = modes; p->m_name != NULL; 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 != NULL; p++) {
printf("%s%s", sep, p->m_name);
if (*sep == ' ')
sep = " | ";
}
printf(" ]\n");
return;
}
/* ARGSUSED */
void
setbinary(int argc, char *argv[])
{
settftpmode("octet");
}
/* ARGSUSED */
void
setascii(int argc, char *argv[])
{
settftpmode("netascii");
}
static void
settftpmode(char *newmode)
{
strlcpy(mode, newmode, sizeof(mode));
if (verbose)
printf("mode set to %s\n", mode);
}
/*
* Send file(s).
*/
void
put(int argc, char *argv[])
{
int fd;
int n;
char *cp, *targ;
if (argc < 2) {
strlcpy(line, "send ", sizeof(line));
printf("(file) ");
readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
if (makeargv())
return;
argc = margc;
argv = margv;
}
if (argc < 2) {
putusage(argv[0]);
return;
}
targ = argv[argc - 1];
if (strchr(argv[argc - 1], ':')) {
struct hostent *hp;
for (n = 1; n < argc - 1; n++)
if (strchr(argv[n], ':')) {
putusage(argv[0]);
return;
}
cp = argv[argc - 1];
targ = strchr(cp, ':');
*targ++ = 0;
hp = gethostbyname(cp);
if (hp == NULL) {
warnx("%s: %s", cp, hstrerror(h_errno));
return;
}
bcopy(hp->h_addr, (caddr_t)&peeraddr.sin_addr, hp->h_length);
peeraddr.sin_family = hp->h_addrtype;
connected = 1;
port = sp->s_port;
strlcpy(hostname, hp->h_name, sizeof(hostname));
}
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("open: %s", cp);
return;
}
if (verbose)
printf("putting %s to %s:%s [%s]\n",
cp, hostname, targ, mode);
peeraddr.sin_port = port;
sendfile(fd, targ, mode);
return;
}
/*
* this assumes the target is a directory on
* on a remote unix system. hmmmm.
*/
for (n = 1; n < argc - 1; n++) {
if (asprintf(&cp, "%s/%s", targ, tail(argv[n])) == -1)
err(1, "asprintf");
fd = open(argv[n], O_RDONLY);
if (fd < 0) {
warn("open: %s", argv[n]);
free(cp);
continue;
}
if (verbose)
printf("putting %s to %s:%s [%s]\n",
argv[n], hostname, cp, mode);
peeraddr.sin_port = port;
sendfile(fd, cp, mode);
free(cp);
}
}
static void
putusage(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(int argc, char *argv[])
{
int fd;
int n;
char *cp;
char *src;
if (argc < 2) {
strlcpy(line, "get ", sizeof(line));
printf("(files) ");
readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
if (makeargv())
return;
argc = margc;
argv = margv;
}
if (argc < 2) {
getusage(argv[0]);
return;
}
if (!connected) {
for (n = 1; n < argc; n++)
if (strchr(argv[n], ':') == 0) {
getusage(argv[0]);
return;
}
}
for (n = 1; n < argc; n++) {
src = strchr(argv[n], ':');
if (src == NULL)
src = argv[n];
else {
struct hostent *hp;
*src++ = 0;
hp = gethostbyname(argv[n]);
if (hp == NULL) {
warnx("%s: %s", argv[n], hstrerror(h_errno));
continue;
}
bcopy(hp->h_addr, (caddr_t)&peeraddr.sin_addr,
hp->h_length);
peeraddr.sin_family = hp->h_addrtype;
connected = 1;
strlcpy(hostname, hp->h_name, sizeof(hostname));
}
if (argc < 4) {
cp = argc == 3 ? argv[2] : tail(src);
fd = creat(cp, 0644);
if (fd < 0) {
warn("create: %s", cp);
return;
}
if (verbose)
printf("getting from %s:%s to %s [%s]\n",
hostname, src, cp, mode);
peeraddr.sin_port = port;
recvfile(fd, src, mode);
break;
}
cp = tail(src); /* new .. jdg */
fd = creat(cp, 0644);
if (fd < 0) {
warn("create: %s", cp);
continue;
}
if (verbose)
printf("getting from %s:%s to %s [%s]\n",
hostname, src, cp, mode);
peeraddr.sin_port = port;
recvfile(fd, src, mode);
}
}
static void
getusage(char *s)
{
printf("usage: %s [host:]file [localname]\n", s);
printf(" %s [host1:]file1 [host2:]file2 ... [hostN:]fileN\n", s);
}
void
setrexmt(int argc, char *argv[])
{
int t;
const char *errstr;
if (argc < 2) {
strlcpy(line, "Rexmt-timeout ", sizeof(line));
printf("(value) ");
readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
if (makeargv())
return;
argc = margc;
argv = margv;
}
if (argc != 2) {
printf("usage: %s value\n", argv[0]);
return;
}
t = strtonum(argv[1], TIMEOUT_MIN, TIMEOUT_MAX, &errstr);
if (errstr)
printf("%s: value is %s\n", argv[1], errstr);
else
rexmtval = t;
}
void
settimeout(int argc, char *argv[])
{
int t;
const char *errstr;
if (argc < 2) {
strlcpy(line, "Maximum-timeout ", sizeof(line));
printf("(value) ");
readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
if (makeargv())
return;
argc = margc;
argv = margv;
}
if (argc != 2) {
printf("usage: %s value\n", argv[0]);
return;
}
t = strtonum(argv[1], TIMEOUT_MIN, TIMEOUT_MAX, &errstr);
if (errstr)
printf("%s: value is %s\n", argv[1], errstr);
else
maxtimeout = t;
}
/* ARGSUSED */
void
status(int argc, char *argv[])
{
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);
}
/* ARGSUSED */
void
intr(int signo)
{
intrflag = 1;
}
char *
tail(char *filename)
{
char *s;
while (*filename) {
s = strrchr(filename, '/');
if (s == NULL)
break;
if (s[1])
return (s + 1);
*s = '\0';
}
return (filename);
}
/*
* Command parser.
*/
static __dead void
command(void)
{
struct cmd *c;
for (;;) {
printf("%s> ", prompt);
if (readcmd(line, LBUFLEN, stdin) < 1)
continue;
if ((line[0] == 0) || (line[0] == '\n'))
continue;
if (makeargv())
continue;
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(char *name)
{
char *p, *q;
struct cmd *c, *found;
int nmatches, longest;
longest = 0;
nmatches = 0;
found = 0;
intrflag = 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 int
makeargv(void)
{
char *cp;
char **argp = margv;
int ret = 0;
margc = 0;
for (cp = line; *cp;) {
if (margc >= MAXARGV) {
printf("too many arguments\n");
ret = 1;
break;
}
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;
return (ret);
}
/* ARGSUSED */
void
quit(int argc, char *argv[])
{
exit(0);
}
/*
* Help command.
*/
void
help(int argc, char *argv[])
{
struct cmd *c;
if (argc == 1) {
printf("Commands may be abbreviated. Commands are:\n\n");
for (c = cmdtab; c->name != NULL; 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);
}
}
/* ARGSUSED */
void
settrace(int argc, char *argv[])
{
trace = !trace;
printf("Packet tracing %s.\n", trace ? "on" : "off");
}
/* ARGSUSED */
void
setverbose(int argc, char *argv[])
{
verbose = !verbose;
printf("Verbose mode %s.\n", verbose ? "on" : "off");
}
/* ARGSUSED */
void
settsize(int argc, char *argv[])
{
opt_tsize = !opt_tsize;
printf("Tsize option %s.\n", opt_tsize ? "on" : "off");
if (opt_tsize)
has_options++;
else
has_options--;
}
/* ARGSUSED */
void
settout(int argc, char *argv[])
{
opt_tout = !opt_tout;
printf("Timeout option %s.\n", opt_tout ? "on" : "off");
if (opt_tout)
has_options++;
else
has_options--;
}
void
setblksize(int argc, char *argv[])
{
int t;
const char *errstr;
if (argc < 2) {
strlcpy(line, "Blocksize ", sizeof(line));
printf("(value) ");
readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
if (makeargv())
return;
argc = margc;
argv = margv;
}
if (argc != 2) {
printf("usage: %s value\n", argv[0]);
return;
}
t = strtonum(argv[1], SEGSIZE_MIN, SEGSIZE_MAX, &errstr);
if (errstr)
printf("%s: value is %s\n", argv[1], errstr);
else {
if (opt_blksize == 0)
has_options++;
opt_blksize = t;
}
}
int
readcmd(char *input, int len, FILE *stream)
{
int nfds;
struct pollfd pfd[1];
fflush(stdout);
pfd[0].fd = 0;
pfd[0].events = POLLIN;
nfds = poll(pfd, 1, INFTIM);
if (nfds == -1) {
if (intrflag) {
intrflag = 0;
putchar('\n');
return (0);
}
exit(1);
}
if (fgets(input, len, stream) == NULL) {
if (feof(stdin))
exit(0);
else
return (-1);
}
return (1);
}