#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.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
struct sockaddr_storage peeraddr;
int f;
int tftp_trace;
int verbose;
int connected;
char mode[32];
char line[MAXLINE];
int margc;
#define MAX_MARGV 20
char *margv[MAX_MARGV];
extern jmp_buf toplevel;
volatile int txrx_error;
void intr(int) __dead2;
void get(int, char **);
void help(int, char **);
void modecmd(int, char **);
void put(int, char **);
void quit(int, char **) __dead2;
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 *);
#define HELPINDENT (sizeof("connect"))
struct cmd {
const char *name;
const char *help;
void (*handler)(int, char **);
};
const char vhelp[] = "toggle verbose mode";
const char thelp[] = "toggle packet tracing";
const char chelp[] = "connect to remote tftp";
const char qhelp[] = "exit tftp";
const char hhelp[] = "print help information";
const char shelp[] = "send file";
const char rhelp[] = "receive file";
const char mhelp[] = "set file transfer mode";
const char sthelp[] = "show current status";
const char xhelp[] = "set per-packet retransmission timeout";
const char ihelp[] = "set total retransmission timeout";
const char ashelp[] = "set mode to netascii";
const 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 },
{ .name = NULL }
};
struct cmd *getcmd(char *);
char *tail(char *);
int
main(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(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 {
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(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-name [port]\n", argv[0]);
return;
}
if (argc == 3)
setpeer0(argv[1], NULL);
else
setpeer0(argv[1], argv[2]);
}
struct modes {
const char *m_name;
const char *m_mode;
} modes[] = {
{ "ascii", "netascii" },
{ "netascii", "netascii" },
{ "binary", "octet" },
{ "image", "octet" },
{ "octet", "octet" },
{ NULL, NULL }
};
void
modecmd(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]);
}
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(int argc __unused, char **argv __unused)
{
settftpmode("octet");
}
void
setascii(int argc __unused, char **argv __unused)
{
settftpmode("netascii");
}
static void
settftpmode(const char *newmode)
{
strcpy(mode, newmode);
if (verbose)
printf("mode set to %s\n", mode);
}
void
put(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 (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++;
}
setpeer0(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("%s", cp);
return;
}
if (verbose)
printf("putting %s to %s:%s [%s]\n",
cp, hostname, targ, mode);
xmitfile(fd, targ, mode);
return;
}
cp = strchr(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(char *s)
{
printf("usage: %s file ... host:target, or\n", s);
printf(" %s file ... target (when already connected)\n", s);
}
void
get(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 (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 {
*src++ = 0;
cp = argv[n];
if (cp[0] == '[' && cp[strlen(cp) - 1] == ']') {
cp[strlen(cp) - 1] = '\0';
cp++;
}
setpeer0(cp, 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);
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(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;
void
setrexmt(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(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(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", tftp_trace ? "on" : "off");
printf("Rexmt-interval: %d seconds, Max-timeout: %d seconds\n",
rexmtval, maxtimeout);
}
void
intr(int signo __unused)
{
signal(SIGALRM, SIG_IGN);
alarm(0);
longjmp(toplevel, -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);
}
static const char *
command_prompt(void)
{
return ("tftp> ");
}
static void
command(void)
{
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_SETSIZE, 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(txrx_error);
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 == NULL) {
printf("?Invalid command\n");
continue;
}
(*c->handler)(margc, margv);
}
}
struct cmd *
getcmd(char *name)
{
const char *p;
char *q;
struct cmd *c, *found;
int nmatches, longest;
longest = 0;
nmatches = 0;
found = NULL;
for (c = cmdtab; (p = c->name) != NULL; c++) {
for (q = name; *q == *p++; q++)
if (*q == 0)
return (c);
if (!*q) {
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);
}
static void
makeargv(void)
{
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++ = NULL;
}
void
quit(int argc __unused, char **argv __unused)
{
exit(txrx_error);
}
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; 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);
}
}
void
settrace(int argc __unused, char **argv __unused)
{
tftp_trace = !tftp_trace;
printf("Packet tracing %s.\n", tftp_trace ? "on" : "off");
}
void
setverbose(int argc __unused, char **argv __unused)
{
verbose = !verbose;
printf("Verbose mode %s.\n", verbose ? "on" : "off");
}
