diff options
Diffstat (limited to 'libexec/telnetd/termstat.c')
| -rw-r--r-- | libexec/telnetd/termstat.c | 610 |
1 files changed, 0 insertions, 610 deletions
diff --git a/libexec/telnetd/termstat.c b/libexec/telnetd/termstat.c deleted file mode 100644 index 8d8257d..0000000 --- a/libexec/telnetd/termstat.c +++ /dev/null @@ -1,610 +0,0 @@ -/* - * Copyright (c) 1989, 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. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. 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. - */ - -#if 0 -#ifndef lint -static const char sccsid[] = "@(#)termstat.c 8.2 (Berkeley) 5/30/95"; -#endif -#endif -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "telnetd.h" - - -/* - * local variables - */ -int def_tspeed = -1, def_rspeed = -1; -#ifdef TIOCSWINSZ -int def_row = 0, def_col = 0; -#endif -#ifdef LINEMODE -static int _terminit = 0; -#endif /* LINEMODE */ - -#ifdef LINEMODE -/* - * localstat - * - * This function handles all management of linemode. - * - * Linemode allows the client to do the local editing of data - * and send only complete lines to the server. Linemode state is - * based on the state of the pty driver. If the pty is set for - * external processing, then we can use linemode. Further, if we - * can use real linemode, then we can look at the edit control bits - * in the pty to determine what editing the client should do. - * - * Linemode support uses the following state flags to keep track of - * current and desired linemode state. - * alwayslinemode : true if -l was specified on the telnetd - * command line. It means to have linemode on as much as - * possible. - * - * lmodetype: signifies whether the client can - * handle real linemode, or if use of kludgeomatic linemode - * is preferred. It will be set to one of the following: - * REAL_LINEMODE : use linemode option - * NO_KLUDGE : don't initiate kludge linemode. - * KLUDGE_LINEMODE : use kludge linemode - * NO_LINEMODE : client is ignorant of linemode - * - * linemode, uselinemode : linemode is true if linemode - * is currently on, uselinemode is the state that we wish - * to be in. If another function wishes to turn linemode - * on or off, it sets or clears uselinemode. - * - * editmode, useeditmode : like linemode/uselinemode, but - * these contain the edit mode states (edit and trapsig). - * - * The state variables correspond to some of the state information - * in the pty. - * linemode: - * In real linemode, this corresponds to whether the pty - * expects external processing of incoming data. - * In kludge linemode, this more closely corresponds to the - * whether normal processing is on or not. (ICANON in - * system V, or COOKED mode in BSD.) - * If the -l option was specified (alwayslinemode), then - * an attempt is made to force external processing on at - * all times. - * - * The following heuristics are applied to determine linemode - * handling within the server. - * 1) Early on in starting up the server, an attempt is made - * to negotiate the linemode option. If this succeeds - * then lmodetype is set to REAL_LINEMODE and all linemode - * processing occurs in the context of the linemode option. - * 2) If the attempt to negotiate the linemode option failed, - * and the "-k" (don't initiate kludge linemode) isn't set, - * then we try to use kludge linemode. We test for this - * capability by sending "do Timing Mark". If a positive - * response comes back, then we assume that the client - * understands kludge linemode (ech!) and the - * lmodetype flag is set to KLUDGE_LINEMODE. - * 3) Otherwise, linemode is not supported at all and - * lmodetype remains set to NO_LINEMODE (which happens - * to be 0 for convenience). - * 4) At any time a command arrives that implies a higher - * state of linemode support in the client, we move to that - * linemode support. - * - * A short explanation of kludge linemode is in order here. - * 1) The heuristic to determine support for kludge linemode - * is to send a do timing mark. We assume that a client - * that supports timing marks also supports kludge linemode. - * A risky proposition at best. - * 2) Further negotiation of linemode is done by changing the - * the server's state regarding SGA. If server will SGA, - * then linemode is off, if server won't SGA, then linemode - * is on. - */ -void -localstat(void) -{ - int need_will_echo = 0; - - /* - * Check for changes to flow control if client supports it. - */ - flowstat(); - - /* - * Check linemode on/off state - */ - uselinemode = tty_linemode(); - - /* - * If alwayslinemode is on, and pty is changing to turn it off, then - * force linemode back on. - */ - if (alwayslinemode && linemode && !uselinemode) { - uselinemode = 1; - tty_setlinemode(uselinemode); - } - - if (uselinemode) { - /* - * Check for state of BINARY options. - * - * We only need to do the binary dance if we are actually going - * to use linemode. As this confuses some telnet clients - * that don't support linemode, and doesn't gain us - * anything, we don't do it unless we're doing linemode. - * -Crh (henrich@msu.edu) - */ - - if (tty_isbinaryin()) { - if (his_want_state_is_wont(TELOPT_BINARY)) - send_do(TELOPT_BINARY, 1); - } else { - if (his_want_state_is_will(TELOPT_BINARY)) - send_dont(TELOPT_BINARY, 1); - } - - if (tty_isbinaryout()) { - if (my_want_state_is_wont(TELOPT_BINARY)) - send_will(TELOPT_BINARY, 1); - } else { - if (my_want_state_is_will(TELOPT_BINARY)) - send_wont(TELOPT_BINARY, 1); - } - } - - - /* - * Do echo mode handling as soon as we know what the - * linemode is going to be. - * If the pty has echo turned off, then tell the client that - * the server will echo. If echo is on, then the server - * will echo if in character mode, but in linemode the - * client should do local echoing. The state machine will - * not send anything if it is unnecessary, so don't worry - * about that here. - * - * If we need to send the WILL ECHO (because echo is off), - * then delay that until after we have changed the MODE. - * This way, when the user is turning off both editing - * and echo, the client will get editing turned off first. - * This keeps the client from going into encryption mode - * and then right back out if it is doing auto-encryption - * when passwords are being typed. - */ - if (uselinemode) { - if (tty_isecho()) - send_wont(TELOPT_ECHO, 1); - else - need_will_echo = 1; -#ifdef KLUDGELINEMODE - if (lmodetype == KLUDGE_OK) - lmodetype = KLUDGE_LINEMODE; -#endif - } - - /* - * If linemode is being turned off, send appropriate - * command and then we're all done. - */ - if (!uselinemode && linemode) { -# ifdef KLUDGELINEMODE - if (lmodetype == REAL_LINEMODE) { -# endif /* KLUDGELINEMODE */ - send_dont(TELOPT_LINEMODE, 1); -# ifdef KLUDGELINEMODE - } else if (lmodetype == KLUDGE_LINEMODE) - send_will(TELOPT_SGA, 1); -# endif /* KLUDGELINEMODE */ - send_will(TELOPT_ECHO, 1); - linemode = uselinemode; - goto done; - } - -# ifdef KLUDGELINEMODE - /* - * If using real linemode check edit modes for possible later use. - * If we are in kludge linemode, do the SGA negotiation. - */ - if (lmodetype == REAL_LINEMODE) { -# endif /* KLUDGELINEMODE */ - useeditmode = 0; - if (tty_isediting()) - useeditmode |= MODE_EDIT; - if (tty_istrapsig()) - useeditmode |= MODE_TRAPSIG; - if (tty_issofttab()) - useeditmode |= MODE_SOFT_TAB; - if (tty_islitecho()) - useeditmode |= MODE_LIT_ECHO; -# ifdef KLUDGELINEMODE - } else if (lmodetype == KLUDGE_LINEMODE) { - if (tty_isediting() && uselinemode) - send_wont(TELOPT_SGA, 1); - else - send_will(TELOPT_SGA, 1); - } -# endif /* KLUDGELINEMODE */ - - /* - * Negotiate linemode on if pty state has changed to turn it on. - * Send appropriate command and send along edit mode, then all done. - */ - if (uselinemode && !linemode) { -# ifdef KLUDGELINEMODE - if (lmodetype == KLUDGE_LINEMODE) { - send_wont(TELOPT_SGA, 1); - } else if (lmodetype == REAL_LINEMODE) { -# endif /* KLUDGELINEMODE */ - send_do(TELOPT_LINEMODE, 1); - /* send along edit modes */ - output_data("%c%c%c%c%c%c%c", IAC, SB, - TELOPT_LINEMODE, LM_MODE, useeditmode, - IAC, SE); - editmode = useeditmode; -# ifdef KLUDGELINEMODE - } -# endif /* KLUDGELINEMODE */ - linemode = uselinemode; - goto done; - } - -# ifdef KLUDGELINEMODE - /* - * None of what follows is of any value if not using - * real linemode. - */ - if (lmodetype < REAL_LINEMODE) - goto done; -# endif /* KLUDGELINEMODE */ - - if (linemode && his_state_is_will(TELOPT_LINEMODE)) { - /* - * If edit mode changed, send edit mode. - */ - if (useeditmode != editmode) { - /* - * Send along appropriate edit mode mask. - */ - output_data("%c%c%c%c%c%c%c", IAC, SB, - TELOPT_LINEMODE, LM_MODE, useeditmode, - IAC, SE); - editmode = useeditmode; - } - - - /* - * Check for changes to special characters in use. - */ - start_slc(0); - check_slc(); - (void) end_slc(0); - } - -done: - if (need_will_echo) - send_will(TELOPT_ECHO, 1); - /* - * Some things should be deferred until after the pty state has - * been set by the local process. Do those things that have been - * deferred now. This only happens once. - */ - if (_terminit == 0) { - _terminit = 1; - defer_terminit(); - } - - netflush(); - set_termbuf(); - return; - -} /* end of localstat */ -#endif /* LINEMODE */ - -/* - * flowstat - * - * Check for changes to flow control - */ -void -flowstat(void) -{ - if (his_state_is_will(TELOPT_LFLOW)) { - if (tty_flowmode() != flowmode) { - flowmode = tty_flowmode(); - output_data("%c%c%c%c%c%c", - IAC, SB, TELOPT_LFLOW, - flowmode ? LFLOW_ON : LFLOW_OFF, - IAC, SE); - } - if (tty_restartany() != restartany) { - restartany = tty_restartany(); - output_data("%c%c%c%c%c%c", - IAC, SB, TELOPT_LFLOW, - restartany ? LFLOW_RESTART_ANY - : LFLOW_RESTART_XON, - IAC, SE); - } - } -} - -/* - * clientstat - * - * Process linemode related requests from the client. - * Client can request a change to only one of linemode, editmode or slc's - * at a time, and if using kludge linemode, then only linemode may be - * affected. - */ -void -clientstat(int code, int parm1, int parm2) -{ - - /* - * Get a copy of terminal characteristics. - */ - init_termbuf(); - - /* - * Process request from client. code tells what it is. - */ - switch (code) { -#ifdef LINEMODE - case TELOPT_LINEMODE: - /* - * Don't do anything unless client is asking us to change - * modes. - */ - uselinemode = (parm1 == WILL); - if (uselinemode != linemode) { -# ifdef KLUDGELINEMODE - /* - * If using kludge linemode, make sure that - * we can do what the client asks. - * We can not turn off linemode if alwayslinemode - * and the ICANON bit is set. - */ - if (lmodetype == KLUDGE_LINEMODE) { - if (alwayslinemode && tty_isediting()) { - uselinemode = 1; - } - } - - /* - * Quit now if we can't do it. - */ - if (uselinemode == linemode) - return; - - /* - * If using real linemode and linemode is being - * turned on, send along the edit mode mask. - */ - if (lmodetype == REAL_LINEMODE && uselinemode) -# else /* KLUDGELINEMODE */ - if (uselinemode) -# endif /* KLUDGELINEMODE */ - { - useeditmode = 0; - if (tty_isediting()) - useeditmode |= MODE_EDIT; - if (tty_istrapsig) - useeditmode |= MODE_TRAPSIG; - if (tty_issofttab()) - useeditmode |= MODE_SOFT_TAB; - if (tty_islitecho()) - useeditmode |= MODE_LIT_ECHO; - output_data("%c%c%c%c%c%c%c", IAC, - SB, TELOPT_LINEMODE, LM_MODE, - useeditmode, IAC, SE); - editmode = useeditmode; - } - - - tty_setlinemode(uselinemode); - - linemode = uselinemode; - - if (!linemode) - send_will(TELOPT_ECHO, 1); - } - break; - - case LM_MODE: - { - int ack, changed; - - /* - * Client has sent along a mode mask. If it agrees with - * what we are currently doing, ignore it; if not, it could - * be viewed as a request to change. Note that the server - * will change to the modes in an ack if it is different from - * what we currently have, but we will not ack the ack. - */ - useeditmode &= MODE_MASK; - ack = (useeditmode & MODE_ACK); - useeditmode &= ~MODE_ACK; - - if ((changed = (useeditmode ^ editmode))) { - /* - * This check is for a timing problem. If the - * state of the tty has changed (due to the user - * application) we need to process that info - * before we write in the state contained in the - * ack!!! This gets out the new MODE request, - * and when the ack to that command comes back - * we'll set it and be in the right mode. - */ - if (ack) - localstat(); - if (changed & MODE_EDIT) - tty_setedit(useeditmode & MODE_EDIT); - - if (changed & MODE_TRAPSIG) - tty_setsig(useeditmode & MODE_TRAPSIG); - - if (changed & MODE_SOFT_TAB) - tty_setsofttab(useeditmode & MODE_SOFT_TAB); - - if (changed & MODE_LIT_ECHO) - tty_setlitecho(useeditmode & MODE_LIT_ECHO); - - set_termbuf(); - - if (!ack) { - output_data("%c%c%c%c%c%c%c", IAC, - SB, TELOPT_LINEMODE, LM_MODE, - useeditmode|MODE_ACK, - IAC, SE); - } - - editmode = useeditmode; - } - - break; - - } /* end of case LM_MODE */ -#endif /* LINEMODE */ - - case TELOPT_NAWS: -#ifdef TIOCSWINSZ - { - struct winsize ws; - - def_col = parm1; - def_row = parm2; -#ifdef LINEMODE - /* - * Defer changing window size until after terminal is - * initialized. - */ - if (terminit() == 0) - return; -#endif /* LINEMODE */ - - /* - * Change window size as requested by client. - */ - - ws.ws_col = parm1; - ws.ws_row = parm2; - (void) ioctl(pty, TIOCSWINSZ, (char *)&ws); - } -#endif /* TIOCSWINSZ */ - - break; - - case TELOPT_TSPEED: - { - def_tspeed = parm1; - def_rspeed = parm2; -#ifdef LINEMODE - /* - * Defer changing the terminal speed. - */ - if (terminit() == 0) - return; -#endif /* LINEMODE */ - /* - * Change terminal speed as requested by client. - * We set the receive speed first, so that if we can't - * store separate receive and transmit speeds, the transmit - * speed will take precedence. - */ - tty_rspeed(parm2); - tty_tspeed(parm1); - set_termbuf(); - - break; - - } /* end of case TELOPT_TSPEED */ - - default: - /* What? */ - break; - } /* end of switch */ - - netflush(); - -} /* end of clientstat */ - -#ifdef LINEMODE -/* - * defer_terminit - * - * Some things should not be done until after the login process has started - * and all the pty modes are set to what they are supposed to be. This - * function is called when the pty state has been processed for the first time. - * It calls other functions that do things that were deferred in each module. - */ -void -defer_terminit(void) -{ - - /* - * local stuff that got deferred. - */ - if (def_tspeed != -1) { - clientstat(TELOPT_TSPEED, def_tspeed, def_rspeed); - def_tspeed = def_rspeed = 0; - } - -#ifdef TIOCSWINSZ - if (def_col || def_row) { - struct winsize ws; - - memset((char *)&ws, 0, sizeof(ws)); - ws.ws_col = def_col; - ws.ws_row = def_row; - (void) ioctl(pty, TIOCSWINSZ, (char *)&ws); - } -#endif - - /* - * The only other module that currently defers anything. - */ - deferslc(); - -} /* end of defer_terminit */ - -/* - * terminit - * - * Returns true if the pty state has been processed yet. - */ -int -terminit(void) -{ - return(_terminit); - -} /* end of terminit */ -#endif /* LINEMODE */ |
