4.3BSD-Reno/src/usr.bin/tftp/main.c
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)main.c 5.9 (Berkeley) 6/1/90";
#endif /* not lint */
/* Many bug fixes are from Jim Guyton <guyton@rand-unix> */
/*
* TFTP User Program -- Command Interface.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <netinet/in.h>
#include <signal.h>
#include <stdio.h>
#include <errno.h>
#include <setjmp.h>
#include <ctype.h>
#include <netdb.h>
#define TIMEOUT 5 /* secs between rexmt's */
struct sockaddr_in sin;
int f;
short port;
int trace;
int verbose;
int connected;
char mode[32];
char line[200];
int margc;
char *margv[20];
char *prompt = "tftp";
jmp_buf toplevel;
int intr();
struct servent *sp;
int quit(), help(), setverbose(), settrace(), status();
int get(), put(), setpeer(), modecmd(), setrexmt(), settimeout();
int setbinary(), setascii();
#define HELPINDENT (sizeof("connect"))
struct cmd {
char *name;
char *help;
int (*handler)();
};
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 },
0
};
struct cmd *getcmd();
char *tail();
char *index();
char *rindex();
main(argc, argv)
char *argv[];
{
struct sockaddr_in sin;
int top;
sp = getservbyname("tftp", "udp");
if (sp == 0) {
fprintf(stderr, "tftp: udp/tftp: unknown service\n");
exit(1);
}
f = socket(AF_INET, SOCK_DGRAM, 0);
if (f < 0) {
perror("tftp: socket");
exit(3);
}
bzero((char *)&sin, sizeof (sin));
sin.sin_family = AF_INET;
if (bind(f, &sin, sizeof (sin)) < 0) {
perror("tftp: bind");
exit(1);
}
strcpy(mode, "netascii");
signal(SIGINT, intr);
if (argc > 1) {
if (setjmp(toplevel) != 0)
exit(0);
setpeer(argc, argv);
}
top = setjmp(toplevel) == 0;
for (;;)
command(top);
}
char hostname[100];
setpeer(argc, argv)
int argc;
char *argv[];
{
struct hostent *host;
if (argc < 2) {
strcpy(line, "Connect ");
printf("(to) ");
gets(&line[strlen(line)]);
makeargv();
argc = margc;
argv = margv;
}
if (argc > 3) {
printf("usage: %s host-name [port]\n", argv[0]);
return;
}
host = gethostbyname(argv[1]);
if (host) {
sin.sin_family = host->h_addrtype;
bcopy(host->h_addr, &sin.sin_addr, host->h_length);
strcpy(hostname, host->h_name);
} else {
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = inet_addr(argv[1]);
if (sin.sin_addr.s_addr == -1) {
connected = 0;
printf("%s: unknown host\n", argv[1]);
return;
}
strcpy(hostname, argv[1]);
}
port = sp->s_port;
if (argc == 3) {
port = atoi(argv[2]);
if (port < 0) {
printf("%s: bad port number\n", argv[2]);
connected = 0;
return;
}
port = htons(port);
}
connected = 1;
}
struct modes {
char *m_name;
char *m_mode;
} modes[] = {
{ "ascii", "netascii" },
{ "netascii", "netascii" },
{ "binary", "octet" },
{ "image", "octet" },
{ "octet", "octet" },
/* { "mail", "mail" }, */
{ 0, 0 }
};
modecmd(argc, argv)
char *argv[];
{
register 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; p++)
if (strcmp(argv[1], p->m_name) == 0)
break;
if (p->m_name) {
setmode(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;
}
setbinary(argc, argv)
char *argv[];
{ setmode("octet");
}
setascii(argc, argv)
char *argv[];
{ setmode("netascii");
}
setmode(newmode)
char *newmode;
{
strcpy(mode, newmode);
if (verbose)
printf("mode set to %s\n", mode);
}
/*
* Send file(s).
*/
put(argc, argv)
char *argv[];
{
int fd;
register int n;
register char *cp, *targ;
if (argc < 2) {
strcpy(line, "send ");
printf("(file) ");
gets(&line[strlen(line)]);
makeargv();
argc = margc;
argv = margv;
}
if (argc < 2) {
putusage(argv[0]);
return;
}
targ = argv[argc - 1];
if (index(argv[argc - 1], ':')) {
char *cp;
struct hostent *hp;
for (n = 1; n < argc - 1; n++)
if (index(argv[n], ':')) {
putusage(argv[0]);
return;
}
cp = argv[argc - 1];
targ = index(cp, ':');
*targ++ = 0;
hp = gethostbyname(cp);
if (hp == NULL) {
fprintf(stderr, "tftp: %s: ", cp);
herror((char *)NULL);
return;
}
bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
sin.sin_family = hp->h_addrtype;
connected = 1;
strcpy(hostname, hp->h_name);
}
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) {
fprintf(stderr, "tftp: "); perror(cp);
return;
}
if (verbose)
printf("putting %s to %s:%s [%s]\n",
cp, hostname, targ, mode);
sin.sin_port = port;
sendfile(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) {
fprintf(stderr, "tftp: "); perror(argv[n]);
continue;
}
if (verbose)
printf("putting %s to %s:%s [%s]\n",
argv[n], hostname, targ, mode);
sin.sin_port = port;
sendfile(fd, targ, mode);
}
}
putusage(s)
char *s;
{
printf("usage: %s file ... host:target, or\n", s);
printf(" %s file ... target (when already connected)\n", s);
}
/*
* Receive file(s).
*/
get(argc, argv)
char *argv[];
{
int fd;
register int n;
register char *cp;
char *src;
if (argc < 2) {
strcpy(line, "get ");
printf("(files) ");
gets(&line[strlen(line)]);
makeargv();
argc = margc;
argv = margv;
}
if (argc < 2) {
getusage(argv[0]);
return;
}
if (!connected) {
for (n = 1; n < argc ; n++)
if (index(argv[n], ':') == 0) {
getusage(argv[0]);
return;
}
}
for (n = 1; n < argc ; n++) {
src = index(argv[n], ':');
if (src == NULL)
src = argv[n];
else {
struct hostent *hp;
*src++ = 0;
hp = gethostbyname(argv[n]);
if (hp == NULL) {
fprintf(stderr, "tftp: %s: ", argv[n]);
herror((char *)NULL);
continue;
}
bcopy(hp->h_addr, (caddr_t)&sin.sin_addr, hp->h_length);
sin.sin_family = hp->h_addrtype;
connected = 1;
strcpy(hostname, hp->h_name);
}
if (argc < 4) {
cp = argc == 3 ? argv[2] : tail(src);
fd = creat(cp, 0644);
if (fd < 0) {
fprintf(stderr, "tftp: "); perror(cp);
return;
}
if (verbose)
printf("getting from %s:%s to %s [%s]\n",
hostname, src, cp, mode);
sin.sin_port = port;
recvfile(fd, src, mode);
break;
}
cp = tail(src); /* new .. jdg */
fd = creat(cp, 0644);
if (fd < 0) {
fprintf(stderr, "tftp: "); perror(cp);
continue;
}
if (verbose)
printf("getting from %s:%s to %s [%s]\n",
hostname, src, cp, mode);
sin.sin_port = port;
recvfile(fd, src, mode);
}
}
getusage(s)
char * s;
{
printf("usage: %s host:file host:file ... file, or\n", s);
printf(" %s file file ... file if connected\n", s);
}
int rexmtval = TIMEOUT;
setrexmt(argc, argv)
char *argv[];
{
int t;
if (argc < 2) {
strcpy(line, "Rexmt-timeout ");
printf("(value) ");
gets(&line[strlen(line)]);
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", t);
else
rexmtval = t;
}
int maxtimeout = 5 * TIMEOUT;
settimeout(argc, argv)
char *argv[];
{
int t;
if (argc < 2) {
strcpy(line, "Maximum-timeout ");
printf("(value) ");
gets(&line[strlen(line)]);
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", t);
else
maxtimeout = t;
}
status(argc, argv)
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);
}
intr()
{
signal(SIGALRM, SIG_IGN);
alarm(0);
longjmp(toplevel, -1);
}
char *
tail(filename)
char *filename;
{
register char *s;
while (*filename) {
s = rindex(filename, '/');
if (s == NULL)
break;
if (s[1])
return (s + 1);
*s = '\0';
}
return (filename);
}
/*
* Command parser.
*/
command(top)
int top;
{
register struct cmd *c;
if (!top)
putchar('\n');
for (;;) {
printf("%s> ", prompt);
if (gets(line) == 0) {
if (feof(stdin)) {
quit();
} else {
continue;
}
}
if (line[0] == 0)
continue;
makeargv();
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)
register char *name;
{
register char *p, *q;
register struct cmd *c, *found;
register int nmatches, longest;
longest = 0;
nmatches = 0;
found = 0;
for (c = cmdtab; p = c->name; 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.
*/
makeargv()
{
register char *cp;
register char **argp = margv;
margc = 0;
for (cp = line; *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;
}
/*VARARGS*/
quit()
{
exit(0);
}
/*
* Help command.
*/
help(argc, argv)
int argc;
char *argv[];
{
register 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", HELPINDENT, c->name, c->help);
return;
}
while (--argc > 0) {
register 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);
}
}
/*VARARGS*/
settrace()
{
trace = !trace;
printf("Packet tracing %s.\n", trace ? "on" : "off");
}
/*VARARGS*/
setverbose()
{
verbose = !verbose;
printf("Verbose mode %s.\n", verbose ? "on" : "off");
}