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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/tftp/main.c	Lines:	0	330	0.0 %
Date:	2017-11-13	Branches:	0	218	0.0 %


/*	$OpenBSD: main.c,v 1.41 2017/01/21 11:32:04 guenther 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.
 */

/*
 * TFTP User Program -- Command Interface
 *
 * This version includes many modifications by Jim Guyton <guyton@rand-unix>
 */

#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 <limits.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(char *, char *);
void			 parsearg(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_storage	 peeraddr;
int			 f;
int			 trace;
int			 verbose;
int			 connected;
char			 mode[32];
char			 line[LBUFLEN];
int			 margc;
char			*margv[MAXARGV+1];
char			*prompt = "tftp";
void			 intr(int);
int	 		 rexmtval = TIMEOUT;
int	 		 maxtimeout = 5 * TIMEOUT;
char	 		 hostname[HOST_NAME_MAX+1];
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,	parsearg },
	{ "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[])
{
	f = -1;

	if (pledge("stdio rpath wpath cpath dns inet flock", NULL) == -1)
		err(1, "pledge");

	/* set default transfer mode */
	strlcpy(mode, "netascii", sizeof(mode));

	/* set peer if given */
	if (argc > 1)
		parsearg(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(char *host, char *port)
{
	struct addrinfo hints, *res0, *res;
	int error;
	struct sockaddr_storage ss;
	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;
		if (bind(f, (struct sockaddr *)&ss, res->ai_addrlen) < 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)strlcpy(hostname, res->ai_canonname,
			    sizeof(hostname));
		} else
			(void)strlcpy(hostname, host, sizeof(hostname));
			connected = 1;
	}
	freeaddrinfo(res0);
}

void
parsearg(int argc, char *argv[])
{
	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 (argc == 2)
		setpeer(argv[1], NULL);
	else
		setpeer(argv[1], argv[2]);
}

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, "put ", 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 (strrchr(argv[argc - 1], ':')) {

		for (n = 1; n < argc - 1; n++)
			if (strchr(argv[n], ':')) {
				putusage(argv[0]);
				return;
			}
		cp = argv[argc - 1];
		targ = strrchr(cp, ':');
		*targ++ = 0;
		if (cp[0] == '[' && cp[strlen(cp) - 1] == ']') {
			cp[strlen(cp) - 1] = '\0';
			cp++;
		}
		setpeer(cp, 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("open: %s", cp);
			return;
		}
		if (verbose)
			printf("putting %s to %s:%s [%s]\n",
			    cp, hostname, targ, mode);
		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);
		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 (strrchr(argv[n], ':') == 0) {
				getusage(argv[0]);
				return;
			}
	}
	for (n = 1; n < argc; n++) {
		src = strrchr(argv[n], ':');
		if (src == NULL)
			src = argv[n];
		else {
			char *cp;

			*src++ = 0;
			cp = argv[n];
			if (cp[0] == '[' && cp[strlen(cp) - 1] == ']') {
				cp[strlen(cp) - 1] = '\0';
				cp++;
			}
			setpeer(cp, NULL);
			if (!connected)
				continue;
		}
		if (argc < 4) {
			cp = argc == 3 ? argv[2] : tail(src);
			fd = open(cp, O_CREAT | O_TRUNC | O_WRONLY, 0644);
			if (fd < 0) {
				warn("create: %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 = open(cp, O_CREAT | O_TRUNC | O_WRONLY, 0644);
		if (fd < 0) {
			warn("create: %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(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((unsigned char)*cp))
			cp++;
		if (*cp == '\0')
			break;
		*argp++ = cp;
		margc += 1;
		while (*cp != '\0' && !isspace((unsigned char)*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 == NULL)
			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);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: main.c,v 1.41 2017/01/21 11:32:04 guenther Exp $ */
2			/* $NetBSD: main.c,v 1.6 1995/05/21 16:54:10 mycroft Exp $ */
3
4			/*
5			* Copyright (c) 1983, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			/*
34			* TFTP User Program -- Command Interface
35			*
36			* This version includes many modifications by Jim Guyton <guyton@rand-unix>
37			*/
38
39			#include <sys/socket.h>
40			#include <sys/file.h>
41
42			#include <netinet/in.h>
43			#include <arpa/inet.h>
44			#include <arpa/tftp.h>
45
46			#include <ctype.h>
47			#include <err.h>
48			#include <errno.h>
49			#include <netdb.h>
50			#include <poll.h>
51			#include <signal.h>
52			#include <stdio.h>
53			#include <stdlib.h>
54			#include <string.h>
55			#include <unistd.h>
56			#include <limits.h>
57
58			#include "extern.h"
59
60			#define LBUFLEN 200 /* size of input buffer */
61			#define MAXARGV 20
62			#define HELPINDENT (sizeof("connect"))
63
64			void get(int, char **);
65			void help(int, char **);
66			void modecmd(int, char **);
67			void put(int, char **);
68			void quit(int, char **);
69			void setascii(int, char **);
70			void setbinary(int, char **);
71			void setpeer(char , char );
72			void parsearg(int, char **);
73			void setrexmt(int, char **);
74			void settimeout(int, char **);
75			void settrace(int, char **);
76			void setverbose(int, char **);
77			void settsize(int, char **);
78			void settout(int, char **);
79			void setblksize(int, char **);
80			void status(int, char **);
81			int readcmd(char , int, FILE );
82			static void getusage(char *);
83			static int makeargv(void);
84			static void putusage(char *);
85			static void settftpmode(char *);
86			static __dead void command(void);
87			struct cmd getcmd(char );
88			char tail(char );
89
90			struct sockaddr_storage peeraddr;
91			int f;
92			int trace;
93			int verbose;
94			int connected;
95			char mode[32];
96			char line[LBUFLEN];
97			int margc;
98			char *margv[MAXARGV+1];
99			char *prompt = "tftp";
100			void intr(int);
101			int rexmtval = TIMEOUT;
102			int maxtimeout = 5 * TIMEOUT;
103			char hostname[HOST_NAME_MAX+1];
104			FILE *file = NULL;
105			volatile sig_atomic_t intrflag = 0;
106			char *ackbuf;
107			int has_options = 0;
108			int opt_tsize = 0;
109			int opt_tout = 0;
110			int opt_blksize = 0;
111
112			char vhelp[] = "toggle verbose mode";
113			char thelp[] = "toggle packet tracing";
114			char chelp[] = "connect to remote tftp";
115			char qhelp[] = "exit tftp";
116			char hhelp[] = "print help information";
117			char shelp[] = "send file";
118			char rhelp[] = "receive file";
119			char mhelp[] = "set file transfer mode";
120			char sthelp[] = "show current status";
121			char xhelp[] = "set per-packet retransmission timeout";
122			char ihelp[] = "set total retransmission timeout";
123			char ashelp[] = "set mode to netascii";
124			char bnhelp[] = "set mode to octet";
125			char oshelp[] = "toggle tsize option";
126			char othelp[] = "toggle timeout option";
127			char obhelp[] = "set alternative blksize option";
128
129			struct cmd {
130			char *name;
131			char *help;
132			void (handler)(int, char *);
133			};
134
135			struct cmd cmdtab[] = {
136			{ "connect", chelp, parsearg },
137			{ "mode", mhelp, modecmd },
138			{ "put", shelp, put },
139			{ "get", rhelp, get },
140			{ "quit", qhelp, quit },
141			{ "verbose", vhelp, setverbose },
142			{ "trace", thelp, settrace },
143			{ "status", sthelp, status },
144			{ "binary", bnhelp, setbinary },
145			{ "ascii", ashelp, setascii },
146			{ "rexmt", xhelp, setrexmt },
147			{ "timeout", ihelp, settimeout },
148			{ "tsize", oshelp, settsize },
149			{ "tout", othelp, settout },
150			{ "blksize", obhelp, setblksize },
151			{ "help", hhelp, help },
152			{ "?", hhelp, help },
153			{ NULL, NULL, NULL }
154			};
155
156			struct modes {
157			char *m_name;
158			char *m_mode;
159			} modes[] = {
160			{ "ascii", "netascii" },
161			{ "netascii", "netascii" },
162			{ "binary", "octet" },
163			{ "image", "octet" },
164			{ "octet", "octet" },
165			/* { "mail", "mail" }, */
166			{ NULL, NULL }
167			};
168
169			int
170			main(int argc, char *argv[])
171			{
172			f = -1;
173
174			if (pledge("stdio rpath wpath cpath dns inet flock", NULL) == -1)
175			err(1, "pledge");
176
177			/* set default transfer mode */
178			strlcpy(mode, "netascii", sizeof(mode));
179
180			/* set peer if given */
181			if (argc > 1)
182			parsearg(argc, argv);
183
184			/* catch SIGINT */
185			signal(SIGINT, intr);
186
187			/* allocate memory for packets */
188			if ((ackbuf = malloc(SEGSIZE_MAX + 4)) == NULL)
189			err(1, "malloc");
190
191			/* command prompt */
192			command();
193
194			return (0);
195			}
196
197			void
198			setpeer(char host, char port)
199			{
200			struct addrinfo hints, res0, res;
201			int error;
202			struct sockaddr_storage ss;
203			char *cause = "unknown";
204
205			if (connected) {
206			close(f);
207			f = -1;
208			}
209			connected = 0;
210
211			memset(&hints, 0, sizeof(hints));
212			hints.ai_family = PF_UNSPEC;
213			hints.ai_socktype = SOCK_DGRAM;
214			hints.ai_protocol = IPPROTO_UDP;
215			hints.ai_flags = AI_CANONNAME;
216			if (!port)
217			port = "tftp";
218			error = getaddrinfo(host, port, &hints, &res0);
219			if (error) {
220			warnx("%s", gai_strerror(error));
221			return;
222			}
223
224			for (res = res0; res; res = res->ai_next) {
225			if (res->ai_addrlen > sizeof(peeraddr))
226			continue;
227			f = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
228			if (f < 0) {
229			cause = "socket";
230			continue;
231			}
232
233			memset(&ss, 0, sizeof(ss));
234			ss.ss_family = res->ai_family;
235			if (bind(f, (struct sockaddr *)&ss, res->ai_addrlen) < 0) {
236			cause = "bind";
237			close(f);
238			f = -1;
239			continue;
240			}
241
242			break;
243			}
244
245			if (f < 0)
246			warn("%s", cause);
247			else {
248			/* res->ai_addr <= sizeof(peeraddr) is guaranteed */
249			memcpy(&peeraddr, res->ai_addr, res->ai_addrlen);
250			if (res->ai_canonname) {
251			(void)strlcpy(hostname, res->ai_canonname,
252			sizeof(hostname));
253			} else
254			(void)strlcpy(hostname, host, sizeof(hostname));
255			connected = 1;
256			}
257			freeaddrinfo(res0);
258			}
259
260			void
261			parsearg(int argc, char *argv[])
262			{
263			if (argc < 2) {
264			strlcpy(line, "Connect ", sizeof(line));
265			printf("(to) ");
266			readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
267			if (makeargv())
268			return;
269			argc = margc;
270			argv = margv;
271			}
272			if ((argc < 2) \|\| (argc > 3)) {
273			printf("usage: %s [host [port]]\n", argv[0]);
274			return;
275			}
276			if (argc == 2)
277			setpeer(argv[1], NULL);
278			else
279			setpeer(argv[1], argv[2]);
280			}
281
282			void
283			modecmd(int argc, char *argv[])
284			{
285			struct modes *p;
286			char *sep;
287
288			if (argc < 2) {
289			printf("Using %s mode to transfer files.\n", mode);
290			return;
291			}
292			if (argc == 2) {
293			for (p = modes; p->m_name != NULL; p++)
294			if (strcmp(argv[1], p->m_name) == 0)
295			break;
296			if (p->m_name) {
297			settftpmode(p->m_mode);
298			return;
299			}
300			printf("%s: unknown mode\n", argv[1]);
301			/* drop through and print usage message */
302			}
303
304			printf("usage: %s [", argv[0]);
305			sep = " ";
306			for (p = modes; p->m_name != NULL; p++) {
307			printf("%s%s", sep, p->m_name);
308			if (*sep == ' ')
309			sep = " \| ";
310			}
311			printf(" ]\n");
312
313			return;
314			}
315
316			/* ARGSUSED */
317			void
318			setbinary(int argc, char *argv[])
319			{
320			settftpmode("octet");
321			}
322
323			/* ARGSUSED */
324			void
325			setascii(int argc, char *argv[])
326			{
327			settftpmode("netascii");
328			}
329
330			static void
331			settftpmode(char *newmode)
332			{
333			strlcpy(mode, newmode, sizeof(mode));
334			if (verbose)
335			printf("mode set to %s\n", mode);
336			}
337
338			/*
339			* Send file(s).
340			*/
341			void
342			put(int argc, char *argv[])
343			{
344			int fd;
345			int n;
346			char cp, targ;
347
348			if (argc < 2) {
349			strlcpy(line, "put ", sizeof(line));
350			printf("(file) ");
351			readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
352			if (makeargv())
353			return;
354			argc = margc;
355			argv = margv;
356			}
357			if (argc < 2) {
358			putusage(argv[0]);
359			return;
360			}
361			targ = argv[argc - 1];
362			if (strrchr(argv[argc - 1], ':')) {
363
364			for (n = 1; n < argc - 1; n++)
365			if (strchr(argv[n], ':')) {
366			putusage(argv[0]);
367			return;
368			}
369			cp = argv[argc - 1];
370			targ = strrchr(cp, ':');
371			*targ++ = 0;
372			if (cp[0] == '[' && cp[strlen(cp) - 1] == ']') {
373			cp[strlen(cp) - 1] = '\0';
374			cp++;
375			}
376			setpeer(cp, NULL);
377			}
378			if (!connected) {
379			printf("No target machine specified.\n");
380			return;
381			}
382			if (argc < 4) {
383			cp = argc == 2 ? tail(targ) : argv[1];
384			fd = open(cp, O_RDONLY);
385			if (fd < 0) {
386			warn("open: %s", cp);
387			return;
388			}
389			if (verbose)
390			printf("putting %s to %s:%s [%s]\n",
391			cp, hostname, targ, mode);
392			sendfile(fd, targ, mode);
393			return;
394			}
395
396			/*
397			* this assumes the target is a directory on
398			* on a remote unix system. hmmmm.
399			*/
400			for (n = 1; n < argc - 1; n++) {
401			if (asprintf(&cp, "%s/%s", targ, tail(argv[n])) == -1)
402			err(1, "asprintf");
403			fd = open(argv[n], O_RDONLY);
404			if (fd < 0) {
405			warn("open: %s", argv[n]);
406			free(cp);
407			continue;
408			}
409			if (verbose)
410			printf("putting %s to %s:%s [%s]\n",
411			argv[n], hostname, cp, mode);
412			sendfile(fd, cp, mode);
413			free(cp);
414			}
415			}
416
417			static void
418			putusage(char *s)
419			{
420			printf("usage: %s file [[host:]remotename]\n", s);
421			printf(" %s file1 file2 ... fileN [[host:]remote-directory]\n",
422			s);
423			}
424
425			/*
426			* Receive file(s).
427			*/
428			void
429			get(int argc, char *argv[])
430			{
431			int fd;
432			int n;
433			char *cp;
434			char *src;
435
436			if (argc < 2) {
437			strlcpy(line, "get ", sizeof(line));
438			printf("(files) ");
439			readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
440			if (makeargv())
441			return;
442			argc = margc;
443			argv = margv;
444			}
445			if (argc < 2) {
446			getusage(argv[0]);
447			return;
448			}
449			if (!connected) {
450			for (n = 1; n < argc; n++)
451			if (strrchr(argv[n], ':') == 0) {
452			getusage(argv[0]);
453			return;
454			}
455			}
456			for (n = 1; n < argc; n++) {
457			src = strrchr(argv[n], ':');
458			if (src == NULL)
459			src = argv[n];
460			else {
461			char *cp;
462
463			*src++ = 0;
464			cp = argv[n];
465			if (cp[0] == '[' && cp[strlen(cp) - 1] == ']') {
466			cp[strlen(cp) - 1] = '\0';
467			cp++;
468			}
469			setpeer(cp, NULL);
470			if (!connected)
471			continue;
472			}
473			if (argc < 4) {
474			cp = argc == 3 ? argv[2] : tail(src);
475			fd = open(cp, O_CREAT \| O_TRUNC \| O_WRONLY, 0644);
476			if (fd < 0) {
477			warn("create: %s", cp);
478			return;
479			}
480			if (verbose)
481			printf("getting from %s:%s to %s [%s]\n",
482			hostname, src, cp, mode);
483			recvfile(fd, src, mode);
484			break;
485			}
486			cp = tail(src); /* new .. jdg */
487			fd = open(cp, O_CREAT \| O_TRUNC \| O_WRONLY, 0644);
488			if (fd < 0) {
489			warn("create: %s", cp);
490			continue;
491			}
492			if (verbose)
493			printf("getting from %s:%s to %s [%s]\n",
494			hostname, src, cp, mode);
495			recvfile(fd, src, mode);
496			}
497			}
498
499			static void
500			getusage(char *s)
501			{
502			printf("usage: %s [host:]file [localname]\n", s);
503			printf(" %s [host1:]file1 [host2:]file2 ... [hostN:]fileN\n", s);
504			}
505
506			void
507			setrexmt(int argc, char *argv[])
508			{
509			int t;
510			const char *errstr;
511
512			if (argc < 2) {
513			strlcpy(line, "Rexmt-timeout ", sizeof(line));
514			printf("(value) ");
515			readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
516			if (makeargv())
517			return;
518			argc = margc;
519			argv = margv;
520			}
521			if (argc != 2) {
522			printf("usage: %s value\n", argv[0]);
523			return;
524			}
525			t = strtonum(argv[1], TIMEOUT_MIN, TIMEOUT_MAX, &errstr);
526			if (errstr)
527			printf("%s: value is %s\n", argv[1], errstr);
528			else
529			rexmtval = t;
530			}
531
532			void
533			settimeout(int argc, char *argv[])
534			{
535			int t;
536			const char *errstr;
537
538			if (argc < 2) {
539			strlcpy(line, "Maximum-timeout ", sizeof(line));
540			printf("(value) ");
541			readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
542			if (makeargv())
543			return;
544			argc = margc;
545			argv = margv;
546			}
547			if (argc != 2) {
548			printf("usage: %s value\n", argv[0]);
549			return;
550			}
551			t = strtonum(argv[1], TIMEOUT_MIN, TIMEOUT_MAX, &errstr);
552			if (errstr)
553			printf("%s: value is %s\n", argv[1], errstr);
554			else
555			maxtimeout = t;
556			}
557
558			/* ARGSUSED */
559			void
560			status(int argc, char *argv[])
561			{
562			if (connected)
563			printf("Connected to %s.\n", hostname);
564			else
565			printf("Not connected.\n");
566			printf("Mode: %s Verbose: %s Tracing: %s\n",
567			mode, verbose ? "on" : "off", trace ? "on" : "off");
568			printf("Rexmt-interval: %d seconds, Max-timeout: %d seconds\n",
569			rexmtval, maxtimeout);
570			}
571
572			/* ARGSUSED */
573			void
574			intr(int signo)
575			{
576			intrflag = 1;
577			}
578
579			char *
580			tail(char *filename)
581			{
582			char *s;
583
584			while (*filename) {
585			s = strrchr(filename, '/');
586			if (s == NULL)
587			break;
588			if (s[1])
589			return (s + 1);
590			*s = '\0';
591			}
592
593			return (filename);
594			}
595
596			/*
597			* Command parser.
598			*/
599			static __dead void
600			command(void)
601			{
602			struct cmd *c;
603
604			for (;;) {
605			printf("%s> ", prompt);
606			if (readcmd(line, LBUFLEN, stdin) < 1)
607			continue;
608			if ((line[0] == 0) \|\| (line[0] == '\n'))
609			continue;
610			if (makeargv())
611			continue;
612			if (margc == 0)
613			continue;
614			c = getcmd(margv[0]);
615			if (c == (struct cmd *) - 1) {
616			printf("?Ambiguous command\n");
617			continue;
618			}
619			if (c == 0) {
620			printf("?Invalid command\n");
621			continue;
622			}
623			(*c->handler)(margc, margv);
624			}
625			}
626
627			struct cmd *
628			getcmd(char *name)
629			{
630			char p, q;
631			struct cmd c, found;
632			int nmatches, longest;
633
634			longest = 0;
635			nmatches = 0;
636			found = 0;
637			intrflag = 0;
638			for (c = cmdtab; (p = c->name) != NULL; c++) {
639			for (q = name; q == p++; q++)
640			if (q == 0) / exact match? */
641			return (c);
642			if (!q) { / the name was a prefix */
643			if (q - name > longest) {
644			longest = q - name;
645			nmatches = 1;
646			found = c;
647			} else if (q - name == longest)
648			nmatches++;
649			}
650			}
651			if (nmatches > 1)
652			return ((struct cmd *) - 1);
653
654			return (found);
655			}
656
657			/*
658			* Slice a string up into argc/argv.
659			*/
660			static int
661			makeargv(void)
662			{
663			char *cp;
664			char **argp = margv;
665			int ret = 0;
666
667			margc = 0;
668			for (cp = line; *cp;) {
669			if (margc >= MAXARGV) {
670			printf("too many arguments\n");
671			ret = 1;
672			break;
673			}
674			while (isspace((unsigned char)*cp))
675			cp++;
676			if (*cp == '\0')
677			break;
678			*argp++ = cp;
679			margc += 1;
680			while (cp != '\0' && !isspace((unsigned char)cp))
681			cp++;
682			if (*cp == '\0')
683			break;
684			*cp++ = '\0';
685			}
686			*argp++ = 0;
687
688			return (ret);
689			}
690
691			/* ARGSUSED */
692			void
693			quit(int argc, char *argv[])
694			{
695			exit(0);
696			}
697
698			/*
699			* Help command.
700			*/
701			void
702			help(int argc, char *argv[])
703			{
704			struct cmd *c;
705
706			if (argc == 1) {
707			printf("Commands may be abbreviated. Commands are:\n\n");
708			for (c = cmdtab; c->name != NULL; c++)
709			printf("%-*s\t%s\n", (int)HELPINDENT, c->name, c->help);
710			return;
711			}
712			while (--argc > 0) {
713			char *arg;
714			arg = *++argv;
715			c = getcmd(arg);
716			if (c == (struct cmd *) - 1)
717			printf("?Ambiguous help command %s\n", arg);
718			else if (c == NULL)
719			printf("?Invalid help command %s\n", arg);
720			else
721			printf("%s\n", c->help);
722			}
723			}
724
725			/* ARGSUSED */
726			void
727			settrace(int argc, char *argv[])
728			{
729			trace = !trace;
730			printf("Packet tracing %s.\n", trace ? "on" : "off");
731			}
732
733			/* ARGSUSED */
734			void
735			setverbose(int argc, char *argv[])
736			{
737			verbose = !verbose;
738			printf("Verbose mode %s.\n", verbose ? "on" : "off");
739			}
740
741			/* ARGSUSED */
742			void
743			settsize(int argc, char *argv[])
744			{
745			opt_tsize = !opt_tsize;
746			printf("Tsize option %s.\n", opt_tsize ? "on" : "off");
747			if (opt_tsize)
748			has_options++;
749			else
750			has_options--;
751			}
752
753			/* ARGSUSED */
754			void
755			settout(int argc, char *argv[])
756			{
757			opt_tout = !opt_tout;
758			printf("Timeout option %s.\n", opt_tout ? "on" : "off");
759			if (opt_tout)
760			has_options++;
761			else
762			has_options--;
763			}
764
765			void
766			setblksize(int argc, char *argv[])
767			{
768			int t;
769			const char *errstr;
770
771			if (argc < 2) {
772			strlcpy(line, "Blocksize ", sizeof(line));
773			printf("(value) ");
774			readcmd(&line[strlen(line)], LBUFLEN - strlen(line), stdin);
775			if (makeargv())
776			return;
777			argc = margc;
778			argv = margv;
779			}
780			if (argc != 2) {
781			printf("usage: %s value\n", argv[0]);
782			return;
783			}
784			t = strtonum(argv[1], SEGSIZE_MIN, SEGSIZE_MAX, &errstr);
785			if (errstr)
786			printf("%s: value is %s\n", argv[1], errstr);
787			else {
788			if (opt_blksize == 0)
789			has_options++;
790			opt_blksize = t;
791			}
792			}
793
794			int
795			readcmd(char input, int len, FILE stream)
796			{
797			int nfds;
798			struct pollfd pfd[1];
799
800			fflush(stdout);
801
802			pfd[0].fd = 0;
803			pfd[0].events = POLLIN;
804			nfds = poll(pfd, 1, INFTIM);
805			if (nfds == -1) {
806			if (intrflag) {
807			intrflag = 0;
808			putchar('\n');
809			return (0);
810			}
811			exit(1);
812			}
813
814			if (fgets(input, len, stream) == NULL) {
815			if (feof(stdin))
816			exit(0);
817			else
818			return (-1);
819			}
820
821			return (1);
822			}