/* * 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(spty, TIOCSWINSZ, (char *)&ws); } #endif /* * The only other module that currently defers anything. */ deferslc(); } /* end of defer_terminit */
void dontoption(int option) { /* * Process client input. */ DIAG(TD_OPTIONS, printoption("td: recv dont", option)); if (will_wont_resp[option]) { will_wont_resp[option]--; if (will_wont_resp[option] && my_state_is_wont(option)) will_wont_resp[option]--; } if ((will_wont_resp[option] == 0) && (my_want_state_is_will(option))) { switch (option) { case TELOPT_BINARY: init_termbuf(); tty_binaryout(0); set_termbuf(); break; case TELOPT_ECHO: /* we should stop echoing */ #ifdef LINEMODE #ifdef KLUDGELINEMODE if (lmodetype == NO_LINEMODE) #else if (his_state_is_wont(TELOPT_LINEMODE)) #endif #endif { init_termbuf(); tty_setecho(0); set_termbuf(); } break; case TELOPT_SGA: #if defined(LINEMODE) && defined(KLUDGELINEMODE) /* * If kludge linemode is in use, then we * must process an incoming do SGA for * linemode purposes. */ if (lmodetype == KLUDGE_LINEMODE) { /* * The client is asking us to turn * linemode on. */ clientstat(TELOPT_LINEMODE, WILL, 0); /* * If we did not turn line mode on, * then what do we say? Will SGA? * This violates design of telnet. * Gross. Very Gross. */ } break; #else set_my_want_state_wont(option); if (my_state_is_will(option)) send_wont(option, 0); set_my_state_wont(option); if (turn_on_sga ^= 1) send_will(option,1); return; #endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ default: break; } set_my_want_state_wont(option); if (my_state_is_will(option)) send_wont(option, 0); } set_my_state_wont(option); }
void wontoption(int option) { /* * Process client input. */ DIAG(TD_OPTIONS, printoption("td: recv wont", option)); if (do_dont_resp[option]) { do_dont_resp[option]--; if (do_dont_resp[option] && his_state_is_wont(option)) do_dont_resp[option]--; } if (do_dont_resp[option] == 0) { if (his_want_state_is_will(option)) { /* it is always ok to change to negative state */ switch (option) { case TELOPT_ECHO: not42 = 1; /* doesn't seem to be a 4.2 system */ break; case TELOPT_BINARY: init_termbuf(); tty_binaryin(0); set_termbuf(); break; #ifdef LINEMODE case TELOPT_LINEMODE: #ifdef KLUDGELINEMODE /* * If real linemode is supported, then client is * asking to turn linemode off. */ if (lmodetype != REAL_LINEMODE) break; lmodetype = KLUDGE_LINEMODE; # endif /* KLUDGELINEMODE */ clientstat(TELOPT_LINEMODE, WONT, 0); break; #endif /* LINEMODE */ case TELOPT_TM: /* * If we get a WONT TM, and had sent a DO TM, * don't respond with a DONT TM, just leave it * as is. Short circut the state machine to * achive this. */ set_his_want_state_wont(TELOPT_TM); return; case TELOPT_LFLOW: /* * If we are not going to support flow control * option, then let peer know that we can't * change the flow control characters. */ slctab[SLC_XON].defset.flag &= ~SLC_LEVELBITS; slctab[SLC_XON].defset.flag |= SLC_CANTCHANGE; slctab[SLC_XOFF].defset.flag &= ~SLC_LEVELBITS; slctab[SLC_XOFF].defset.flag |= SLC_CANTCHANGE; break; #if defined(AUTHENTICATE) case TELOPT_AUTHENTICATION: auth_finished(0, AUTH_REJECT); break; #endif /* * For options that we might spin waiting for * sub-negotiation, if the client turns off the * option rather than responding to the request, * we have to treat it here as if we got a response * to the sub-negotiation, (by updating the timers) * so that we'll break out of the loop. */ case TELOPT_TTYPE: settimer(ttypesubopt); break; case TELOPT_TSPEED: settimer(tspeedsubopt); break; case TELOPT_XDISPLOC: settimer(xdisplocsubopt); break; case TELOPT_ENVIRON: settimer(environsubopt); break; default: break; } set_his_want_state_wont(option); if (his_state_is_will(option)) send_dont(option, 0); } else { switch (option) { case TELOPT_TM: #if defined(LINEMODE) && defined(KLUDGELINEMODE) if (lmodetype < REAL_LINEMODE) { lmodetype = NO_LINEMODE; clientstat(TELOPT_LINEMODE, WONT, 0); send_will(TELOPT_SGA, 1); send_will(TELOPT_ECHO, 1); } #endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ break; #if defined(AUTHENTICATE) case TELOPT_AUTHENTICATION: auth_finished(0, AUTH_REJECT); break; #endif default: break; } } } } /* end of wontoption */
void dooption(int option) { int changeok = 0; /* * Process client input. */ DIAG(TD_OPTIONS, printoption("td: recv do", option)); if (will_wont_resp[option]) { will_wont_resp[option]--; if (will_wont_resp[option] && my_state_is_will(option)) will_wont_resp[option]--; } if ((will_wont_resp[option] == 0) && (my_want_state_is_wont(option))) { switch (option) { case TELOPT_ECHO: #ifdef LINEMODE #ifdef KLUDGELINEMODE if (lmodetype == NO_LINEMODE) #else if (his_state_is_wont(TELOPT_LINEMODE)) #endif #endif { init_termbuf(); tty_setecho(1); set_termbuf(); } changeok++; break; case TELOPT_BINARY: init_termbuf(); tty_binaryout(1); set_termbuf(); changeok++; break; case TELOPT_SGA: #if defined(LINEMODE) && defined(KLUDGELINEMODE) /* * If kludge linemode is in use, then we must * process an incoming do SGA for linemode * purposes. */ if (lmodetype == KLUDGE_LINEMODE) { /* * Receipt of "do SGA" in kludge * linemode is the peer asking us to * turn off linemode. Make note of * the request. */ clientstat(TELOPT_LINEMODE, WONT, 0); /* * If linemode did not get turned off * then don't tell peer that we did. * Breaking here forces a wont SGA to * be returned. */ if (linemode) break; } #else turn_on_sga = 0; #endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ changeok++; break; case TELOPT_STATUS: changeok++; break; case TELOPT_TM: /* * Special case for TM. We send a WILL, but * pretend we sent a WONT. */ send_will(option, 0); set_my_want_state_wont(option); set_my_state_wont(option); return; case TELOPT_LOGOUT: /* * When we get a LOGOUT option, respond * with a WILL LOGOUT, make sure that * it gets written out to the network, * and then just go away... */ set_my_want_state_will(TELOPT_LOGOUT); send_will(TELOPT_LOGOUT, 0); set_my_state_will(TELOPT_LOGOUT); (void)netflush(); cleanup(0); /* NOT REACHED */ break; #if defined(ENCRYPT) case TELOPT_ENCRYPT: changeok++; break; #endif case TELOPT_LINEMODE: case TELOPT_TTYPE: case TELOPT_NAWS: case TELOPT_TSPEED: case TELOPT_LFLOW: case TELOPT_XDISPLOC: case TELOPT_ENVIRON: default: break; } if (changeok) { set_my_want_state_will(option); send_will(option, 0); } else { will_wont_resp[option]++; send_wont(option, 0); } } set_my_state_will(option); }
void willoption(int option) { int changeok = 0; void (*func)(void) = 0; /* * process input from peer. */ DIAG(TD_OPTIONS, printoption("td: recv will", option)); if (do_dont_resp[option]) { do_dont_resp[option]--; if (do_dont_resp[option] && his_state_is_will(option)) do_dont_resp[option]--; } if (do_dont_resp[option] == 0) { if (his_want_state_is_wont(option)) { switch (option) { case TELOPT_BINARY: init_termbuf(); tty_binaryin(1); set_termbuf(); changeok++; break; case TELOPT_ECHO: /* * See comments below for more info. */ not42 = 0; /* looks like a 4.2 system */ break; case TELOPT_TM: #if defined(LINEMODE) && defined(KLUDGELINEMODE) /* * This telnetd implementation does not really * support timing marks, it just uses them to * support the kludge linemode stuff. If we * receive a will or wont TM in response to our * do TM request that may have been sent to * determine kludge linemode support, process * it, otherwise TM should get a negative * response back. */ /* * Handle the linemode kludge stuff. * If we are not currently supporting any * linemode at all, then we assume that this * is the client telling us to use kludge * linemode in response to our query. Set the * linemode type that is to be supported, note * that the client wishes to use linemode, and * eat the will TM as though it never arrived. */ if (lmodetype < KLUDGE_LINEMODE) { lmodetype = KLUDGE_LINEMODE; clientstat(TELOPT_LINEMODE, WILL, 0); send_wont(TELOPT_SGA, 1); } #endif /* defined(LINEMODE) && defined(KLUDGELINEMODE) */ /* * We never respond to a WILL TM, and * we leave the state WONT. */ return; case TELOPT_LFLOW: /* * If we are going to support flow control * option, then don't worry peer that we can't * change the flow control characters. */ slctab[SLC_XON].defset.flag &= ~SLC_LEVELBITS; slctab[SLC_XON].defset.flag |= SLC_DEFAULT; slctab[SLC_XOFF].defset.flag &= ~SLC_LEVELBITS; slctab[SLC_XOFF].defset.flag |= SLC_DEFAULT; case TELOPT_TTYPE: case TELOPT_SGA: case TELOPT_NAWS: case TELOPT_TSPEED: case TELOPT_XDISPLOC: case TELOPT_ENVIRON: changeok++; break; #ifdef LINEMODE case TELOPT_LINEMODE: #ifdef KLUDGELINEMODE /* * Note client's desire to use linemode. */ lmodetype = REAL_LINEMODE; #endif /* KLUDGELINEMODE */ func = doclientstat; changeok++; break; #endif /* LINEMODE */ #ifdef AUTHENTICATE case TELOPT_AUTHENTICATION: func = auth_request; changeok++; break; #endif #ifdef ENCRYPT case TELOPT_ENCRYPT: func = encrypt_send_support; changeok++; break; #endif default: break; } if (changeok) { set_his_want_state_will(option); send_do(option, 0); } else { do_dont_resp[option]++; send_dont(option, 0); } } else { /* * Option processing that should happen when * we receive conformation of a change in * state that we had requested. */ switch (option) { case TELOPT_ECHO: not42 = 0; /* looks like a 4.2 system */ /* * Egads, he responded "WILL ECHO". Turn * it off right now! */ send_dont(option, 1); /* * "WILL ECHO". Kludge upon kludge! * A 4.2 client is now echoing user input at * the tty. This is probably undesireable and * it should be stopped. The client will * respond WONT TM to the DO TM that we send to * check for kludge linemode. When the WONT TM * arrives, linemode will be turned off and a * change propogated to the pty. This change * will cause us to process the new pty state * in localstat(), which will notice that * linemode is off and send a WILL ECHO * so that we are properly in character mode and * all is well. */ break; #ifdef LINEMODE case TELOPT_LINEMODE: # ifdef KLUDGELINEMODE /* * Note client's desire to use linemode. */ lmodetype = REAL_LINEMODE; # endif /* KLUDGELINEMODE */ func = doclientstat; break; #endif /* LINEMODE */ #ifdef AUTHENTICATE case TELOPT_AUTHENTICATION: func = auth_request; break; #endif #ifdef ENCRYPT case TELOPT_ENCRYPT: func = encrypt_send_support; break; #endif } } } set_his_state_will(option); if (func) (*func)(); }