* Created: Thu Apr 7 13:29:41 1994 too
* Last modified: Fri Jun 9 14:34:24 2000 too
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*
* HISTORY
* Revision 3.1 1994/04/17 11:31:54 too
* initial revision
- * Modified 2000/06/13 for inclusion into BusyBox by Erik Andersen
- * <andersen@lineo.com>
+ * Modified 2000/06/13 for inclusion into BusyBox by Erik Andersen <andersen@codepoet.org>
* Modified 2001/05/07 to add ability to pass TTYPE to remote host by Jim McQuillan
* <jam@ltsp.org>
+ * Modified 2004/02/11 to add ability to pass the USER variable to remote host
+ * by Fernando Silveira <swrh@gmx.net>
*
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
-#include <netdb.h>
#include "busybox.h"
-#ifdef CONFIG_FEATURE_AUTOWIDTH
-# include <sys/ioctl.h>
-#endif
-
#if 0
-static const int DOTRACE = 1;
+enum { DOTRACE = 1 };
#endif
#ifdef DOTRACE
#include <arpa/inet.h> /* for inet_ntoa()... */
#define TRACE(x, y) do { if (x) printf y; } while (0)
#else
-#define TRACE(x, y)
-#endif
-
-#if 0
-#define USE_POLL
-#include <sys/poll.h>
-#else
-#include <sys/time.h>
+#define TRACE(x, y)
#endif
#define DATABUFSIZE 128
#define IACBUFSIZE 128
-static const int CHM_TRY = 0;
-static const int CHM_ON = 1;
-static const int CHM_OFF = 2;
+enum {
+ CHM_TRY = 0,
+ CHM_ON = 1,
+ CHM_OFF = 2,
-static const int UF_ECHO = 0x01;
-static const int UF_SGA = 0x02;
+ UF_ECHO = 0x01,
+ UF_SGA = 0x02,
-enum {
TS_0 = 1,
TS_IAC = 2,
TS_OPT = 3,
byte charmode;
byte telflags;
byte gotsig;
+ byte do_termios;
/* buffer to handle telnet negotiations */
char iacbuf[IACBUFSIZE];
short iaclen; /* could even use byte */
- struct termios termios_def;
- struct termios termios_raw;
+ struct termios termios_def;
+ struct termios termios_raw;
} G;
#define xUSE_GLOBALVAR_PTR /* xUSE... -> don't use :D (makes smaller code) */
#ifdef USE_GLOBALVAR_PTR
struct Globalvars * Gptr;
#define G (*Gptr)
-#else
-static struct Globalvars G;
#endif
static inline void iacflush(void)
}
/* Function prototypes */
-static int getport(char * p);
-static struct in_addr getserver(char * p);
-static void setup_sockaddr_in(struct sockaddr_in * addr, int port);
-static int remote_connect(struct in_addr addr, int port);
static void rawmode(void);
static void cookmode(void);
static void do_linemode(void);
static void will_charmode(void);
static void telopt(byte c);
static int subneg(byte c);
-#if 0
-static int local_bind(int port);
-#endif
/* Some globals */
static int one = 1;
static char *ttype;
#endif
+#ifdef CONFIG_FEATURE_TELNET_AUTOLOGIN
+static const char *autologin;
+#endif
+
#ifdef CONFIG_FEATURE_AUTOWIDTH
static int win_width, win_height;
#endif
{
cookmode();
exit(ev);
-}
+}
static void conescape(void)
{
if (G.gotsig)
cookmode();
-
+
rrturn:
G.gotsig = 0;
-
+
}
static void handlenetoutput(int len)
{
*/
int i, j;
- byte * p = G.buf;
+ byte * p = (byte*)G.buf;
byte outbuf[4*DATABUFSIZE];
for (i = len, j = 0; i > 0; i--, p++)
}
#endif
+#ifdef CONFIG_FEATURE_TELNET_AUTOLOGIN
+static void putiac_subopt_autologin(void)
+{
+ int len = strlen(autologin) + 6; // (2 + 1 + 1 + strlen + 2)
+ char *user = "USER";
+
+ if (G.iaclen + len > IACBUFSIZE)
+ iacflush();
+
+ putiac(IAC);
+ putiac(SB);
+ putiac(TELOPT_NEW_ENVIRON);
+ putiac(TELQUAL_IS);
+ putiac(NEW_ENV_VAR);
+
+ while(*user)
+ putiac(*user++);
+
+ putiac(NEW_ENV_VALUE);
+
+ while(*autologin)
+ putiac(*autologin++);
+
+ putiac(IAC);
+ putiac(SE);
+}
+#endif
+
#ifdef CONFIG_FEATURE_AUTOWIDTH
static void putiac_naws(byte c, int x, int y)
{
G.charmode = CHM_TRY;
G.telflags |= (UF_ECHO | UF_SGA);
setConMode();
-
+
putiac2(DO, TELOPT_ECHO);
putiac2(DO, TELOPT_SGA);
iacflush();
/* if server requests ECHO, don't agree */
if (G.telwish == DO) { putiac2(WONT, TELOPT_ECHO); return; }
else if (G.telwish == DONT) return;
-
+
if (G.telflags & UF_ECHO)
{
if (G.telwish == WILL)
else
if (G.telwish == WONT)
return;
-
+
if ((G.telflags ^= UF_SGA) & UF_SGA) /* toggle */
putiac2(DO, TELOPT_SGA);
else
}
#endif
+#ifdef CONFIG_FEATURE_TELNET_AUTOLOGIN
+static inline void to_new_environ(void)
+{
+ /* Tell server we will (or will not) do AUTOLOGIN */
+
+ if (autologin)
+ putiac2(WILL, TELOPT_NEW_ENVIRON);
+ else
+ putiac2(WONT, TELOPT_NEW_ENVIRON);
+
+ return;
+}
+#endif
+
#ifdef CONFIG_FEATURE_AUTOWIDTH
static inline void to_naws(void)
-{
+{
/* Tell server we will do NAWS */
putiac2(WILL, TELOPT_NAWS);
return;
-}
+}
#endif
static void telopt(byte c)
#ifdef CONFIG_FEATURE_TELNET_TTYPE
case TELOPT_TTYPE: to_ttype();break;
#endif
+#ifdef CONFIG_FEATURE_TELNET_AUTOLOGIN
+ case TELOPT_NEW_ENVIRON: to_new_environ(); break;
+#endif
#ifdef CONFIG_FEATURE_AUTOWIDTH
case TELOPT_NAWS: to_naws();
putiac_naws(c, win_width, win_height);
else
if (c == TELOPT_TTYPE)
putiac_subopt(TELOPT_TTYPE,ttype);
+#endif
+#ifdef CONFIG_FEATURE_TELNET_AUTOLOGIN
+ else
+ if (c == TELOPT_NEW_ENVIRON)
+ putiac_subopt_autologin();
#endif
break;
case TS_SUB2:
static void rawmode(void)
{
- tcsetattr(0, TCSADRAIN, &G.termios_raw);
-}
+ if (G.do_termios) tcsetattr(0, TCSADRAIN, &G.termios_raw);
+}
static void cookmode(void)
{
- tcsetattr(0, TCSADRAIN, &G.termios_def);
+ if (G.do_termios) tcsetattr(0, TCSADRAIN, &G.termios_def);
}
-extern int telnet_main(int argc, char** argv)
+int telnet_main(int argc, char** argv)
{
- struct in_addr host;
- int port;
int len;
+ struct sockaddr_in s_in;
#ifdef USE_POLL
struct pollfd ufds[2];
-#else
+#else
fd_set readfds;
int maxfd;
-#endif
+#endif
#ifdef CONFIG_FEATURE_AUTOWIDTH
- struct winsize winp;
- if( ioctl(0, TIOCGWINSZ, &winp) == 0 ) {
- win_width = winp.ws_col;
- win_height = winp.ws_row;
- }
+ get_terminal_width_height(0, &win_width, &win_height);
#endif
#ifdef CONFIG_FEATURE_TELNET_TTYPE
memset(&G, 0, sizeof G);
- if (tcgetattr(0, &G.termios_def) < 0)
- exit(1);
-
- G.termios_raw = G.termios_def;
- cfmakeraw(&G.termios_raw);
-
- if (argc < 2) show_usage();
- port = (argc > 2)? getport(argv[2]): 23;
-
- host = getserver(argv[1]);
+ if (tcgetattr(0, &G.termios_def) >= 0) {
+ G.do_termios = 1;
+
+ G.termios_raw = G.termios_def;
+ cfmakeraw(&G.termios_raw);
+ }
+
+ if (argc < 2)
+ bb_show_usage();
+
+#ifdef CONFIG_FEATURE_TELNET_AUTOLOGIN
+ if (1 & bb_getopt_ulflags(argc, argv, "al:", &autologin))
+ autologin = getenv("USER");
+
+ if (optind < argc) {
+ bb_lookup_host(&s_in, argv[optind++]);
+ s_in.sin_port = bb_lookup_port((optind < argc) ? argv[optind++] :
+ "telnet", "tcp", 23);
+ if (optind < argc)
+ bb_show_usage();
+ } else
+ bb_show_usage();
+#else
+ bb_lookup_host(&s_in, argv[1]);
+ s_in.sin_port = bb_lookup_port((argc == 3) ? argv[2] : "telnet", "tcp", 23);
+#endif
- G.netfd = remote_connect(host, port);
+ G.netfd = xconnect(&s_in);
+
+ setsockopt(G.netfd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof one);
signal(SIGINT, fgotsig);
#ifdef USE_POLL
ufds[0].fd = 0; ufds[1].fd = G.netfd;
ufds[0].events = ufds[1].events = POLLIN;
-#else
+#else
FD_ZERO(&readfds);
FD_SET(0, &readfds);
FD_SET(G.netfd, &readfds);
maxfd = G.netfd + 1;
#endif
-
+
while (1)
{
#ifndef USE_POLL
fd_set rfds = readfds;
-
+
switch (select(maxfd, &rfds, NULL, NULL, NULL))
#else
switch (poll(ufds, 2, -1))
-#endif
+#endif
{
case 0:
/* timeout */
#ifdef USE_POLL
if (ufds[0].revents) /* well, should check POLLIN, but ... */
-#else
+#else
if (FD_ISSET(0, &rfds))
-#endif
+#endif
{
len = read(0, G.buf, DATABUFSIZE);
doexit(0);
TRACE(0, ("Read con: %d\n", len));
-
+
handlenetoutput(len);
}
#ifdef USE_POLL
if (ufds[1].revents) /* well, should check POLLIN, but ... */
-#else
+#else
if (FD_ISSET(G.netfd, &rfds))
-#endif
+#endif
{
len = read(G.netfd, G.buf, DATABUFSIZE);
}
}
}
-
-static int getport(char * p)
-{
- unsigned int port = atoi(p);
-
- if ((unsigned)(port - 1 ) > 65534)
- {
- error_msg_and_die("%s: bad port number", p);
- }
- return port;
-}
-
-static struct in_addr getserver(char * host)
-{
- struct in_addr addr;
-
- struct hostent * he;
- he = xgethostbyname(host);
- memcpy(&addr, he->h_addr, sizeof addr);
-
- TRACE(1, ("addr: %s\n", inet_ntoa(addr)));
-
- return addr;
-}
-
-static int create_socket(void)
-{
- return socket(AF_INET, SOCK_STREAM, 0);
-}
-
-static void setup_sockaddr_in(struct sockaddr_in * addr, int port)
-{
- memset(addr, 0, sizeof(struct sockaddr_in));
- addr->sin_family = AF_INET;
- addr->sin_port = htons(port);
-}
-
-#if 0
-static int local_bind(int port)
-{
- struct sockaddr_in s_addr;
- int s = create_socket();
-
- setup_sockaddr_in(&s_addr, port);
-
- setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
-
- if (bind(s, &s_addr, sizeof s_addr) < 0)
- {
- char * e = sys_errlist[errno];
- syserrorexit("bind");
- exit(1);
- }
- listen(s, 1);
-
- return s;
-}
-#endif
-
-static int remote_connect(struct in_addr addr, int port)
-{
- struct sockaddr_in s_addr;
- int s = create_socket();
-
- setup_sockaddr_in(&s_addr, port);
- s_addr.sin_addr = addr;
-
- setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof one);
-
- if (connect(s, (struct sockaddr *)&s_addr, sizeof s_addr) < 0)
- {
- perror_msg_and_die("Unable to connect to remote host");
- }
- return s;
-}
-
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
projects / oweals / busybox.git / blobdiff