181cb6ddcSMark Murray /* 281cb6ddcSMark Murray * Copyright (c) 1988, 1990, 1993 381cb6ddcSMark Murray * The Regents of the University of California. All rights reserved. 481cb6ddcSMark Murray * 581cb6ddcSMark Murray * Redistribution and use in source and binary forms, with or without 681cb6ddcSMark Murray * modification, are permitted provided that the following conditions 781cb6ddcSMark Murray * are met: 881cb6ddcSMark Murray * 1. Redistributions of source code must retain the above copyright 981cb6ddcSMark Murray * notice, this list of conditions and the following disclaimer. 1081cb6ddcSMark Murray * 2. Redistributions in binary form must reproduce the above copyright 1181cb6ddcSMark Murray * notice, this list of conditions and the following disclaimer in the 1281cb6ddcSMark Murray * documentation and/or other materials provided with the distribution. 1383129c0bSEd Maste * 3. Neither the name of the University nor the names of its contributors 1481cb6ddcSMark Murray * may be used to endorse or promote products derived from this software 1581cb6ddcSMark Murray * without specific prior written permission. 1681cb6ddcSMark Murray * 1781cb6ddcSMark Murray * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1881cb6ddcSMark Murray * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1981cb6ddcSMark Murray * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2081cb6ddcSMark Murray * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2181cb6ddcSMark Murray * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2281cb6ddcSMark Murray * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2381cb6ddcSMark Murray * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2481cb6ddcSMark Murray * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2581cb6ddcSMark Murray * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2681cb6ddcSMark Murray * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2781cb6ddcSMark Murray * SUCH DAMAGE. 2881cb6ddcSMark Murray */ 2981cb6ddcSMark Murray 3077b7cdf1SDavid E. O'Brien #if 0 3181cb6ddcSMark Murray #ifndef lint 3204c426ccSMark Murray static const char sccsid[] = "@(#)telnet.c 8.4 (Berkeley) 5/30/95"; 33ecece7e3SPeter Wemm #endif 3477b7cdf1SDavid E. O'Brien #endif 3577b7cdf1SDavid E. O'Brien #include <sys/cdefs.h> 3677b7cdf1SDavid E. O'Brien __FBSDID("$FreeBSD$"); 3781cb6ddcSMark Murray 3881cb6ddcSMark Murray #include <sys/types.h> 3981cb6ddcSMark Murray 4081cb6ddcSMark Murray /* By the way, we need to include curses.h before telnet.h since, 4181cb6ddcSMark Murray * among other things, telnet.h #defines 'DO', which is a variable 4281cb6ddcSMark Murray * declared in curses.h. 4381cb6ddcSMark Murray */ 4481cb6ddcSMark Murray 4581cb6ddcSMark Murray #include <ctype.h> 468fa113e5SMark Murray #include <curses.h> 478fa113e5SMark Murray #include <signal.h> 4804c426ccSMark Murray #include <stdlib.h> 498fa113e5SMark Murray #include <term.h> 5004c426ccSMark Murray #include <unistd.h> 51ad11def5SEnji Cooper #include <arpa/inet.h> 528fa113e5SMark Murray #include <arpa/telnet.h> 5304c426ccSMark Murray 5481cb6ddcSMark Murray #include "ring.h" 5581cb6ddcSMark Murray 5681cb6ddcSMark Murray #include "defines.h" 5781cb6ddcSMark Murray #include "externs.h" 5881cb6ddcSMark Murray #include "types.h" 5981cb6ddcSMark Murray #include "general.h" 6081cb6ddcSMark Murray 618fa113e5SMark Murray #ifdef AUTHENTICATION 6204c426ccSMark Murray #include <libtelnet/auth.h> 6304c426ccSMark Murray #endif 648fa113e5SMark Murray #ifdef ENCRYPTION 6504c426ccSMark Murray #include <libtelnet/encrypt.h> 6604c426ccSMark Murray #endif 6704c426ccSMark Murray #include <libtelnet/misc.h> 68ad11def5SEnji Cooper 6981cb6ddcSMark Murray #define strip(x) ((my_want_state_is_wont(TELOPT_BINARY)) ? ((x)&0x7f) : (x)) 7081cb6ddcSMark Murray 7181cb6ddcSMark Murray static unsigned char subbuffer[SUBBUFSIZE], 7281cb6ddcSMark Murray *subpointer, *subend; /* buffer for sub-options */ 7381cb6ddcSMark Murray #define SB_CLEAR() subpointer = subbuffer; 7481cb6ddcSMark Murray #define SB_TERM() { subend = subpointer; SB_CLEAR(); } 7581cb6ddcSMark Murray #define SB_ACCUM(c) if (subpointer < (subbuffer+sizeof subbuffer)) { \ 7681cb6ddcSMark Murray *subpointer++ = (c); \ 7781cb6ddcSMark Murray } 7881cb6ddcSMark Murray 7981cb6ddcSMark Murray #define SB_GET() ((*subpointer++)&0xff) 8081cb6ddcSMark Murray #define SB_PEEK() ((*subpointer)&0xff) 8181cb6ddcSMark Murray #define SB_EOF() (subpointer >= subend) 8281cb6ddcSMark Murray #define SB_LEN() (subend - subpointer) 8381cb6ddcSMark Murray 8481cb6ddcSMark Murray char options[256]; /* The combined options */ 8581cb6ddcSMark Murray char do_dont_resp[256]; 8681cb6ddcSMark Murray char will_wont_resp[256]; 8781cb6ddcSMark Murray 8881cb6ddcSMark Murray int 8981cb6ddcSMark Murray eight = 0, 9081cb6ddcSMark Murray autologin = 0, /* Autologin anyone? */ 9181cb6ddcSMark Murray skiprc = 0, 9281cb6ddcSMark Murray connected, 9381cb6ddcSMark Murray showoptions, 9481cb6ddcSMark Murray ISend, /* trying to send network data in */ 95074e8e8eSMark Murray telnet_debug = 0, 9681cb6ddcSMark Murray crmod, 9781cb6ddcSMark Murray netdata, /* Print out network data flow */ 9881cb6ddcSMark Murray crlf, /* Should '\r' be mapped to <CR><LF> (or <CR><NUL>)? */ 9981cb6ddcSMark Murray telnetport, 10081cb6ddcSMark Murray SYNCHing, /* we are in TELNET SYNCH mode */ 10181cb6ddcSMark Murray flushout, /* flush output */ 10281cb6ddcSMark Murray autoflush = 0, /* flush output when interrupting? */ 10381cb6ddcSMark Murray autosynch, /* send interrupt characters with SYNCH? */ 10481cb6ddcSMark Murray localflow, /* we handle flow control locally */ 10581cb6ddcSMark Murray restartany, /* if flow control enabled, restart on any character */ 10681cb6ddcSMark Murray localchars, /* we recognize interrupt/quit */ 10781cb6ddcSMark Murray donelclchars, /* the user has set "localchars" */ 10881cb6ddcSMark Murray donebinarytoggle, /* the user has put us in binary */ 10981cb6ddcSMark Murray dontlecho, /* do we suppress local echoing right now? */ 11004c426ccSMark Murray globalmode, 11142cf8219SRuslan Ermilov doaddrlookup = 1, /* do a reverse address lookup? */ 11204c426ccSMark Murray clienteof = 0; 11381cb6ddcSMark Murray 11481cb6ddcSMark Murray char *prompt = 0; 11521f083c0SMark Murray #ifdef ENCRYPTION 116cd189e11SPeter Wemm char *line; /* hack around breakage in sra.c :-( !! */ 11721f083c0SMark Murray #endif 11881cb6ddcSMark Murray 11981cb6ddcSMark Murray cc_t escape; 12081cb6ddcSMark Murray cc_t rlogin; 12181cb6ddcSMark Murray #ifdef KLUDGELINEMODE 12281cb6ddcSMark Murray cc_t echoc; 12381cb6ddcSMark Murray #endif 12481cb6ddcSMark Murray 12581cb6ddcSMark Murray /* 12681cb6ddcSMark Murray * Telnet receiver states for fsm 12781cb6ddcSMark Murray */ 12881cb6ddcSMark Murray #define TS_DATA 0 12981cb6ddcSMark Murray #define TS_IAC 1 13081cb6ddcSMark Murray #define TS_WILL 2 13181cb6ddcSMark Murray #define TS_WONT 3 13281cb6ddcSMark Murray #define TS_DO 4 13381cb6ddcSMark Murray #define TS_DONT 5 13481cb6ddcSMark Murray #define TS_CR 6 13581cb6ddcSMark Murray #define TS_SB 7 /* sub-option collection */ 13681cb6ddcSMark Murray #define TS_SE 8 /* looking for sub-option end */ 13781cb6ddcSMark Murray 13881cb6ddcSMark Murray static int telrcv_state; 13981cb6ddcSMark Murray #ifdef OLD_ENVIRON 14081cb6ddcSMark Murray unsigned char telopt_environ = TELOPT_NEW_ENVIRON; 14181cb6ddcSMark Murray #else 14281cb6ddcSMark Murray # define telopt_environ TELOPT_NEW_ENVIRON 14381cb6ddcSMark Murray #endif 14481cb6ddcSMark Murray 1458fa113e5SMark Murray jmp_buf toplevel; 14681cb6ddcSMark Murray 14781cb6ddcSMark Murray int flushline; 14881cb6ddcSMark Murray int linemode; 14981cb6ddcSMark Murray 15081cb6ddcSMark Murray #ifdef KLUDGELINEMODE 15181cb6ddcSMark Murray int kludgelinemode = 1; 15281cb6ddcSMark Murray #endif 15381cb6ddcSMark Murray 1548fa113e5SMark Murray static int is_unique(char *, char **, char **); 1558fa113e5SMark Murray 15681cb6ddcSMark Murray /* 15781cb6ddcSMark Murray * The following are some clocks used to decide how to interpret 15881cb6ddcSMark Murray * the relationship between various variables. 15981cb6ddcSMark Murray */ 16081cb6ddcSMark Murray 16181cb6ddcSMark Murray Clocks clocks; 162ad11def5SEnji Cooper 16381cb6ddcSMark Murray /* 16481cb6ddcSMark Murray * Initialize telnet environment. 16581cb6ddcSMark Murray */ 16681cb6ddcSMark Murray 16781cb6ddcSMark Murray void 1688fa113e5SMark Murray init_telnet(void) 16981cb6ddcSMark Murray { 17081cb6ddcSMark Murray env_init(); 17181cb6ddcSMark Murray 17281cb6ddcSMark Murray SB_CLEAR(); 17381cb6ddcSMark Murray ClearArray(options); 17481cb6ddcSMark Murray 1758fa113e5SMark Murray connected = ISend = localflow = donebinarytoggle = 0; 1768fa113e5SMark Murray #ifdef AUTHENTICATION 1778fa113e5SMark Murray #ifdef ENCRYPTION 17881cb6ddcSMark Murray auth_encrypt_connect(connected); 1798fa113e5SMark Murray #endif 1808fa113e5SMark Murray #endif 18181cb6ddcSMark Murray restartany = -1; 18281cb6ddcSMark Murray 18381cb6ddcSMark Murray SYNCHing = 0; 18481cb6ddcSMark Murray 18581cb6ddcSMark Murray /* Don't change NetTrace */ 18681cb6ddcSMark Murray 18781cb6ddcSMark Murray escape = CONTROL(']'); 18881cb6ddcSMark Murray rlogin = _POSIX_VDISABLE; 18981cb6ddcSMark Murray #ifdef KLUDGELINEMODE 19081cb6ddcSMark Murray echoc = CONTROL('E'); 19181cb6ddcSMark Murray #endif 19281cb6ddcSMark Murray 19381cb6ddcSMark Murray flushline = 1; 19481cb6ddcSMark Murray telrcv_state = TS_DATA; 19581cb6ddcSMark Murray } 196ad11def5SEnji Cooper 19781cb6ddcSMark Murray 19881cb6ddcSMark Murray /* 19981cb6ddcSMark Murray * These routines are in charge of sending option negotiations 20081cb6ddcSMark Murray * to the other side. 20181cb6ddcSMark Murray * 20281cb6ddcSMark Murray * The basic idea is that we send the negotiation if either side 20381cb6ddcSMark Murray * is in disagreement as to what the current state should be. 20481cb6ddcSMark Murray */ 20581cb6ddcSMark Murray 206ad11def5SEnji Cooper unsigned char ComPortBaudRate[256]; 207ad11def5SEnji Cooper 208ad11def5SEnji Cooper void 209ad11def5SEnji Cooper DoBaudRate(char *arg) 210ad11def5SEnji Cooper { 211ad11def5SEnji Cooper char *temp, temp2[10]; 212ad11def5SEnji Cooper int i; 213ad11def5SEnji Cooper uint32_t baudrate; 214ad11def5SEnji Cooper 215ad11def5SEnji Cooper errno = 0; 216ad11def5SEnji Cooper baudrate = (uint32_t)strtol(arg, &temp, 10); 217ad11def5SEnji Cooper if (temp[0] != '\0' || (baudrate == 0 && errno != 0)) 218ad11def5SEnji Cooper ExitString("Invalid baud rate provided.\n", 1); 219ad11def5SEnji Cooper 220ad11def5SEnji Cooper for (i = 1; termspeeds[i].speed != -1; i++) 221ad11def5SEnji Cooper if (baudrate == termspeeds[i].speed) 222ad11def5SEnji Cooper break; 223ad11def5SEnji Cooper if (termspeeds[i].speed == -1) 224ad11def5SEnji Cooper ExitString("Invalid baud rate provided.\n", 1); 225ad11def5SEnji Cooper 226ad11def5SEnji Cooper strlcpy(ComPortBaudRate, arg, sizeof(ComPortBaudRate)); 227ad11def5SEnji Cooper 228ad11def5SEnji Cooper if (NETROOM() < sizeof(temp2)) { 229ad11def5SEnji Cooper ExitString("No room in buffer for baud rate.\n", 1); 230ad11def5SEnji Cooper /* NOTREACHED */ 231ad11def5SEnji Cooper } 232ad11def5SEnji Cooper 233ad11def5SEnji Cooper snprintf(temp2, sizeof(temp2), "%c%c%c%c....%c%c", IAC, SB, TELOPT_COMPORT, 234ad11def5SEnji Cooper COMPORT_SET_BAUDRATE, IAC, SE); 235ad11def5SEnji Cooper 236ad11def5SEnji Cooper baudrate = htonl(baudrate); 237ad11def5SEnji Cooper memcpy(&temp2[4], &baudrate, sizeof(baudrate)); 238ad11def5SEnji Cooper ring_supply_data(&netoring, temp2, sizeof(temp2)); 239ad11def5SEnji Cooper printsub('>', &temp[2], sizeof(temp2) - 2); 240ad11def5SEnji Cooper } 241ad11def5SEnji Cooper 24281cb6ddcSMark Murray void 2438fa113e5SMark Murray send_do(int c, int init) 24481cb6ddcSMark Murray { 24581cb6ddcSMark Murray if (init) { 24681cb6ddcSMark Murray if (((do_dont_resp[c] == 0) && my_state_is_do(c)) || 24781cb6ddcSMark Murray my_want_state_is_do(c)) 24881cb6ddcSMark Murray return; 24981cb6ddcSMark Murray set_my_want_state_do(c); 25081cb6ddcSMark Murray do_dont_resp[c]++; 25181cb6ddcSMark Murray } 2523a44a4c3SAnton Berezin if (telnetport < 0) 2533a44a4c3SAnton Berezin return; 25481cb6ddcSMark Murray NET2ADD(IAC, DO); 25581cb6ddcSMark Murray NETADD(c); 25681cb6ddcSMark Murray printoption("SENT", DO, c); 25781cb6ddcSMark Murray } 25881cb6ddcSMark Murray 25981cb6ddcSMark Murray void 2608fa113e5SMark Murray send_dont(int c, int init) 26181cb6ddcSMark Murray { 26281cb6ddcSMark Murray if (init) { 26381cb6ddcSMark Murray if (((do_dont_resp[c] == 0) && my_state_is_dont(c)) || 26481cb6ddcSMark Murray my_want_state_is_dont(c)) 26581cb6ddcSMark Murray return; 26681cb6ddcSMark Murray set_my_want_state_dont(c); 26781cb6ddcSMark Murray do_dont_resp[c]++; 26881cb6ddcSMark Murray } 2693a44a4c3SAnton Berezin if (telnetport < 0) 2703a44a4c3SAnton Berezin return; 27181cb6ddcSMark Murray NET2ADD(IAC, DONT); 27281cb6ddcSMark Murray NETADD(c); 27381cb6ddcSMark Murray printoption("SENT", DONT, c); 27481cb6ddcSMark Murray } 27581cb6ddcSMark Murray 27681cb6ddcSMark Murray void 2778fa113e5SMark Murray send_will(int c, int init) 27881cb6ddcSMark Murray { 27981cb6ddcSMark Murray if (init) { 28081cb6ddcSMark Murray if (((will_wont_resp[c] == 0) && my_state_is_will(c)) || 28181cb6ddcSMark Murray my_want_state_is_will(c)) 28281cb6ddcSMark Murray return; 28381cb6ddcSMark Murray set_my_want_state_will(c); 28481cb6ddcSMark Murray will_wont_resp[c]++; 28581cb6ddcSMark Murray } 2863a44a4c3SAnton Berezin if (telnetport < 0) 2873a44a4c3SAnton Berezin return; 28881cb6ddcSMark Murray NET2ADD(IAC, WILL); 28981cb6ddcSMark Murray NETADD(c); 29081cb6ddcSMark Murray printoption("SENT", WILL, c); 29181cb6ddcSMark Murray } 29281cb6ddcSMark Murray 29381cb6ddcSMark Murray void 2948fa113e5SMark Murray send_wont(int c, int init) 29581cb6ddcSMark Murray { 29681cb6ddcSMark Murray if (init) { 29781cb6ddcSMark Murray if (((will_wont_resp[c] == 0) && my_state_is_wont(c)) || 29881cb6ddcSMark Murray my_want_state_is_wont(c)) 29981cb6ddcSMark Murray return; 30081cb6ddcSMark Murray set_my_want_state_wont(c); 30181cb6ddcSMark Murray will_wont_resp[c]++; 30281cb6ddcSMark Murray } 3033a44a4c3SAnton Berezin if (telnetport < 0) 3043a44a4c3SAnton Berezin return; 30581cb6ddcSMark Murray NET2ADD(IAC, WONT); 30681cb6ddcSMark Murray NETADD(c); 30781cb6ddcSMark Murray printoption("SENT", WONT, c); 30881cb6ddcSMark Murray } 30981cb6ddcSMark Murray 31081cb6ddcSMark Murray void 3118fa113e5SMark Murray willoption(int option) 31281cb6ddcSMark Murray { 31381cb6ddcSMark Murray int new_state_ok = 0; 31481cb6ddcSMark Murray 31581cb6ddcSMark Murray if (do_dont_resp[option]) { 31681cb6ddcSMark Murray --do_dont_resp[option]; 31781cb6ddcSMark Murray if (do_dont_resp[option] && my_state_is_do(option)) 31881cb6ddcSMark Murray --do_dont_resp[option]; 31981cb6ddcSMark Murray } 32081cb6ddcSMark Murray 32181cb6ddcSMark Murray if ((do_dont_resp[option] == 0) && my_want_state_is_dont(option)) { 32281cb6ddcSMark Murray 32381cb6ddcSMark Murray switch (option) { 32481cb6ddcSMark Murray 32581cb6ddcSMark Murray case TELOPT_ECHO: 32681cb6ddcSMark Murray case TELOPT_BINARY: 32781cb6ddcSMark Murray case TELOPT_SGA: 32881cb6ddcSMark Murray settimer(modenegotiated); 32981cb6ddcSMark Murray /* FALLTHROUGH */ 33081cb6ddcSMark Murray case TELOPT_STATUS: 3318fa113e5SMark Murray #ifdef AUTHENTICATION 33281cb6ddcSMark Murray case TELOPT_AUTHENTICATION: 33381cb6ddcSMark Murray #endif 33481cb6ddcSMark Murray #ifdef ENCRYPTION 33581cb6ddcSMark Murray case TELOPT_ENCRYPT: 33681cb6ddcSMark Murray #endif /* ENCRYPTION */ 33781cb6ddcSMark Murray new_state_ok = 1; 33881cb6ddcSMark Murray break; 33981cb6ddcSMark Murray 34081cb6ddcSMark Murray case TELOPT_TM: 34181cb6ddcSMark Murray if (flushout) 34281cb6ddcSMark Murray flushout = 0; 34381cb6ddcSMark Murray /* 34481cb6ddcSMark Murray * Special case for TM. If we get back a WILL, 34581cb6ddcSMark Murray * pretend we got back a WONT. 34681cb6ddcSMark Murray */ 34781cb6ddcSMark Murray set_my_want_state_dont(option); 34881cb6ddcSMark Murray set_my_state_dont(option); 34981cb6ddcSMark Murray return; /* Never reply to TM will's/wont's */ 35081cb6ddcSMark Murray 35181cb6ddcSMark Murray case TELOPT_LINEMODE: 35281cb6ddcSMark Murray default: 35381cb6ddcSMark Murray break; 35481cb6ddcSMark Murray } 35581cb6ddcSMark Murray 35681cb6ddcSMark Murray if (new_state_ok) { 35781cb6ddcSMark Murray set_my_want_state_do(option); 35881cb6ddcSMark Murray send_do(option, 0); 35981cb6ddcSMark Murray setconnmode(0); /* possibly set new tty mode */ 36081cb6ddcSMark Murray } else { 36181cb6ddcSMark Murray do_dont_resp[option]++; 36281cb6ddcSMark Murray send_dont(option, 0); 36381cb6ddcSMark Murray } 36481cb6ddcSMark Murray } 36581cb6ddcSMark Murray set_my_state_do(option); 36681cb6ddcSMark Murray #ifdef ENCRYPTION 36781cb6ddcSMark Murray if (option == TELOPT_ENCRYPT) 36881cb6ddcSMark Murray encrypt_send_support(); 36981cb6ddcSMark Murray #endif /* ENCRYPTION */ 37081cb6ddcSMark Murray } 37181cb6ddcSMark Murray 37281cb6ddcSMark Murray void 3738fa113e5SMark Murray wontoption(int option) 37481cb6ddcSMark Murray { 37581cb6ddcSMark Murray if (do_dont_resp[option]) { 37681cb6ddcSMark Murray --do_dont_resp[option]; 37781cb6ddcSMark Murray if (do_dont_resp[option] && my_state_is_dont(option)) 37881cb6ddcSMark Murray --do_dont_resp[option]; 37981cb6ddcSMark Murray } 38081cb6ddcSMark Murray 38181cb6ddcSMark Murray if ((do_dont_resp[option] == 0) && my_want_state_is_do(option)) { 38281cb6ddcSMark Murray 38381cb6ddcSMark Murray switch (option) { 38481cb6ddcSMark Murray 38581cb6ddcSMark Murray #ifdef KLUDGELINEMODE 38681cb6ddcSMark Murray case TELOPT_SGA: 38781cb6ddcSMark Murray if (!kludgelinemode) 38881cb6ddcSMark Murray break; 38981cb6ddcSMark Murray /* FALLTHROUGH */ 39081cb6ddcSMark Murray #endif 39181cb6ddcSMark Murray case TELOPT_ECHO: 39281cb6ddcSMark Murray settimer(modenegotiated); 39381cb6ddcSMark Murray break; 39481cb6ddcSMark Murray 39581cb6ddcSMark Murray case TELOPT_TM: 39681cb6ddcSMark Murray if (flushout) 39781cb6ddcSMark Murray flushout = 0; 39881cb6ddcSMark Murray set_my_want_state_dont(option); 39981cb6ddcSMark Murray set_my_state_dont(option); 40081cb6ddcSMark Murray return; /* Never reply to TM will's/wont's */ 40181cb6ddcSMark Murray 40281cb6ddcSMark Murray default: 40381cb6ddcSMark Murray break; 40481cb6ddcSMark Murray } 40581cb6ddcSMark Murray set_my_want_state_dont(option); 40681cb6ddcSMark Murray if (my_state_is_do(option)) 40781cb6ddcSMark Murray send_dont(option, 0); 40881cb6ddcSMark Murray setconnmode(0); /* Set new tty mode */ 40981cb6ddcSMark Murray } else if (option == TELOPT_TM) { 41081cb6ddcSMark Murray /* 41181cb6ddcSMark Murray * Special case for TM. 41281cb6ddcSMark Murray */ 41381cb6ddcSMark Murray if (flushout) 41481cb6ddcSMark Murray flushout = 0; 41581cb6ddcSMark Murray set_my_want_state_dont(option); 41681cb6ddcSMark Murray } 41781cb6ddcSMark Murray set_my_state_dont(option); 41881cb6ddcSMark Murray } 41981cb6ddcSMark Murray 42081cb6ddcSMark Murray static void 4218fa113e5SMark Murray dooption(int option) 42281cb6ddcSMark Murray { 42381cb6ddcSMark Murray int new_state_ok = 0; 42481cb6ddcSMark Murray 42581cb6ddcSMark Murray if (will_wont_resp[option]) { 42681cb6ddcSMark Murray --will_wont_resp[option]; 42781cb6ddcSMark Murray if (will_wont_resp[option] && my_state_is_will(option)) 42881cb6ddcSMark Murray --will_wont_resp[option]; 42981cb6ddcSMark Murray } 43081cb6ddcSMark Murray 43181cb6ddcSMark Murray if (will_wont_resp[option] == 0) { 43281cb6ddcSMark Murray if (my_want_state_is_wont(option)) { 43381cb6ddcSMark Murray 43481cb6ddcSMark Murray switch (option) { 43581cb6ddcSMark Murray 43681cb6ddcSMark Murray case TELOPT_TM: 43781cb6ddcSMark Murray /* 43881cb6ddcSMark Murray * Special case for TM. We send a WILL, but pretend 43981cb6ddcSMark Murray * we sent WONT. 44081cb6ddcSMark Murray */ 44181cb6ddcSMark Murray send_will(option, 0); 44281cb6ddcSMark Murray set_my_want_state_wont(TELOPT_TM); 44381cb6ddcSMark Murray set_my_state_wont(TELOPT_TM); 44481cb6ddcSMark Murray return; 44581cb6ddcSMark Murray 44681cb6ddcSMark Murray case TELOPT_BINARY: /* binary mode */ 44781cb6ddcSMark Murray case TELOPT_NAWS: /* window size */ 44881cb6ddcSMark Murray case TELOPT_TSPEED: /* terminal speed */ 44981cb6ddcSMark Murray case TELOPT_LFLOW: /* local flow control */ 45081cb6ddcSMark Murray case TELOPT_TTYPE: /* terminal type option */ 45181cb6ddcSMark Murray case TELOPT_SGA: /* no big deal */ 45281cb6ddcSMark Murray #ifdef ENCRYPTION 45381cb6ddcSMark Murray case TELOPT_ENCRYPT: /* encryption variable option */ 45481cb6ddcSMark Murray #endif /* ENCRYPTION */ 45581cb6ddcSMark Murray new_state_ok = 1; 45681cb6ddcSMark Murray break; 45781cb6ddcSMark Murray 45881cb6ddcSMark Murray case TELOPT_NEW_ENVIRON: /* New environment variable option */ 45981cb6ddcSMark Murray #ifdef OLD_ENVIRON 46081cb6ddcSMark Murray if (my_state_is_will(TELOPT_OLD_ENVIRON)) 46181cb6ddcSMark Murray send_wont(TELOPT_OLD_ENVIRON, 1); /* turn off the old */ 46281cb6ddcSMark Murray goto env_common; 46381cb6ddcSMark Murray case TELOPT_OLD_ENVIRON: /* Old environment variable option */ 46481cb6ddcSMark Murray if (my_state_is_will(TELOPT_NEW_ENVIRON)) 46581cb6ddcSMark Murray break; /* Don't enable if new one is in use! */ 46681cb6ddcSMark Murray env_common: 46781cb6ddcSMark Murray telopt_environ = option; 46881cb6ddcSMark Murray #endif 46981cb6ddcSMark Murray new_state_ok = 1; 47081cb6ddcSMark Murray break; 47181cb6ddcSMark Murray 4728fa113e5SMark Murray #ifdef AUTHENTICATION 47381cb6ddcSMark Murray case TELOPT_AUTHENTICATION: 47481cb6ddcSMark Murray if (autologin) 47581cb6ddcSMark Murray new_state_ok = 1; 47681cb6ddcSMark Murray break; 47781cb6ddcSMark Murray #endif 47881cb6ddcSMark Murray 47981cb6ddcSMark Murray case TELOPT_XDISPLOC: /* X Display location */ 4808fa113e5SMark Murray if (env_getvalue("DISPLAY")) 48181cb6ddcSMark Murray new_state_ok = 1; 48281cb6ddcSMark Murray break; 48381cb6ddcSMark Murray 48481cb6ddcSMark Murray case TELOPT_LINEMODE: 48581cb6ddcSMark Murray #ifdef KLUDGELINEMODE 48681cb6ddcSMark Murray kludgelinemode = 0; 48781cb6ddcSMark Murray send_do(TELOPT_SGA, 1); 48881cb6ddcSMark Murray #endif 48981cb6ddcSMark Murray set_my_want_state_will(TELOPT_LINEMODE); 49081cb6ddcSMark Murray send_will(option, 0); 49181cb6ddcSMark Murray set_my_state_will(TELOPT_LINEMODE); 49281cb6ddcSMark Murray slc_init(); 49381cb6ddcSMark Murray return; 49481cb6ddcSMark Murray 49581cb6ddcSMark Murray case TELOPT_ECHO: /* We're never going to echo... */ 49681cb6ddcSMark Murray default: 49781cb6ddcSMark Murray break; 49881cb6ddcSMark Murray } 49981cb6ddcSMark Murray 50081cb6ddcSMark Murray if (new_state_ok) { 50181cb6ddcSMark Murray set_my_want_state_will(option); 50281cb6ddcSMark Murray send_will(option, 0); 50381cb6ddcSMark Murray setconnmode(0); /* Set new tty mode */ 50481cb6ddcSMark Murray } else { 50581cb6ddcSMark Murray will_wont_resp[option]++; 50681cb6ddcSMark Murray send_wont(option, 0); 50781cb6ddcSMark Murray } 50881cb6ddcSMark Murray } else { 50981cb6ddcSMark Murray /* 51081cb6ddcSMark Murray * Handle options that need more things done after the 51181cb6ddcSMark Murray * other side has acknowledged the option. 51281cb6ddcSMark Murray */ 51381cb6ddcSMark Murray switch (option) { 51481cb6ddcSMark Murray case TELOPT_LINEMODE: 51581cb6ddcSMark Murray #ifdef KLUDGELINEMODE 51681cb6ddcSMark Murray kludgelinemode = 0; 51781cb6ddcSMark Murray send_do(TELOPT_SGA, 1); 51881cb6ddcSMark Murray #endif 51981cb6ddcSMark Murray set_my_state_will(option); 52081cb6ddcSMark Murray slc_init(); 52181cb6ddcSMark Murray send_do(TELOPT_SGA, 0); 52281cb6ddcSMark Murray return; 52381cb6ddcSMark Murray } 52481cb6ddcSMark Murray } 52581cb6ddcSMark Murray } 52681cb6ddcSMark Murray set_my_state_will(option); 52781cb6ddcSMark Murray } 52881cb6ddcSMark Murray 52981cb6ddcSMark Murray static void 5308fa113e5SMark Murray dontoption(int option) 53181cb6ddcSMark Murray { 53281cb6ddcSMark Murray 53381cb6ddcSMark Murray if (will_wont_resp[option]) { 53481cb6ddcSMark Murray --will_wont_resp[option]; 53581cb6ddcSMark Murray if (will_wont_resp[option] && my_state_is_wont(option)) 53681cb6ddcSMark Murray --will_wont_resp[option]; 53781cb6ddcSMark Murray } 53881cb6ddcSMark Murray 53981cb6ddcSMark Murray if ((will_wont_resp[option] == 0) && my_want_state_is_will(option)) { 54081cb6ddcSMark Murray switch (option) { 54181cb6ddcSMark Murray case TELOPT_LINEMODE: 54281cb6ddcSMark Murray linemode = 0; /* put us back to the default state */ 54381cb6ddcSMark Murray break; 54481cb6ddcSMark Murray #ifdef OLD_ENVIRON 54581cb6ddcSMark Murray case TELOPT_NEW_ENVIRON: 54681cb6ddcSMark Murray /* 54781cb6ddcSMark Murray * The new environ option wasn't recognized, try 54881cb6ddcSMark Murray * the old one. 54981cb6ddcSMark Murray */ 55081cb6ddcSMark Murray send_will(TELOPT_OLD_ENVIRON, 1); 55181cb6ddcSMark Murray telopt_environ = TELOPT_OLD_ENVIRON; 55281cb6ddcSMark Murray break; 55381cb6ddcSMark Murray #endif 55481cb6ddcSMark Murray } 55581cb6ddcSMark Murray /* we always accept a DONT */ 55681cb6ddcSMark Murray set_my_want_state_wont(option); 55781cb6ddcSMark Murray if (my_state_is_will(option)) 55881cb6ddcSMark Murray send_wont(option, 0); 55981cb6ddcSMark Murray setconnmode(0); /* Set new tty mode */ 56081cb6ddcSMark Murray } 56181cb6ddcSMark Murray set_my_state_wont(option); 56281cb6ddcSMark Murray } 56381cb6ddcSMark Murray 56481cb6ddcSMark Murray /* 56581cb6ddcSMark Murray * Given a buffer returned by tgetent(), this routine will turn 5669a01d32bSJeroen Ruigrok van der Werven * the pipe separated list of names in the buffer into an array 56781cb6ddcSMark Murray * of pointers to null terminated names. We toss out any bad, 56881cb6ddcSMark Murray * duplicate, or verbose names (names with spaces). 56981cb6ddcSMark Murray */ 57081cb6ddcSMark Murray 5718fa113e5SMark Murray static const char *name_unknown = "UNKNOWN"; 5728fa113e5SMark Murray static const char *unknown[] = { NULL, NULL }; 57381cb6ddcSMark Murray 5748fa113e5SMark Murray static const char ** 5758fa113e5SMark Murray mklist(char *buf, char *name) 57681cb6ddcSMark Murray { 5778fa113e5SMark Murray int n; 5788fa113e5SMark Murray char c, *cp, **argvp, *cp2, **argv, **avt; 57981cb6ddcSMark Murray 58081cb6ddcSMark Murray if (name) { 58121f083c0SMark Murray if (strlen(name) > 40) { 58281cb6ddcSMark Murray name = 0; 58381cb6ddcSMark Murray unknown[0] = name_unknown; 58481cb6ddcSMark Murray } else { 58581cb6ddcSMark Murray unknown[0] = name; 58681cb6ddcSMark Murray upcase(name); 58781cb6ddcSMark Murray } 58881cb6ddcSMark Murray } else 58981cb6ddcSMark Murray unknown[0] = name_unknown; 59081cb6ddcSMark Murray /* 59181cb6ddcSMark Murray * Count up the number of names. 59281cb6ddcSMark Murray */ 59381cb6ddcSMark Murray for (n = 1, cp = buf; *cp && *cp != ':'; cp++) { 59481cb6ddcSMark Murray if (*cp == '|') 59581cb6ddcSMark Murray n++; 59681cb6ddcSMark Murray } 59781cb6ddcSMark Murray /* 59881cb6ddcSMark Murray * Allocate an array to put the name pointers into 59981cb6ddcSMark Murray */ 60081cb6ddcSMark Murray argv = (char **)malloc((n+3)*sizeof(char *)); 60181cb6ddcSMark Murray if (argv == 0) 60281cb6ddcSMark Murray return(unknown); 60381cb6ddcSMark Murray 60481cb6ddcSMark Murray /* 60581cb6ddcSMark Murray * Fill up the array of pointers to names. 60681cb6ddcSMark Murray */ 60781cb6ddcSMark Murray *argv = 0; 60881cb6ddcSMark Murray argvp = argv+1; 60981cb6ddcSMark Murray n = 0; 61081cb6ddcSMark Murray for (cp = cp2 = buf; (c = *cp); cp++) { 61181cb6ddcSMark Murray if (c == '|' || c == ':') { 61281cb6ddcSMark Murray *cp++ = '\0'; 61381cb6ddcSMark Murray /* 61481cb6ddcSMark Murray * Skip entries that have spaces or are over 40 61581cb6ddcSMark Murray * characters long. If this is our environment 61681cb6ddcSMark Murray * name, then put it up front. Otherwise, as 61781cb6ddcSMark Murray * long as this is not a duplicate name (case 61881cb6ddcSMark Murray * insensitive) add it to the list. 61981cb6ddcSMark Murray */ 62081cb6ddcSMark Murray if (n || (cp - cp2 > 41)) 62181cb6ddcSMark Murray ; 62281cb6ddcSMark Murray else if (name && (strncasecmp(name, cp2, cp-cp2) == 0)) 62381cb6ddcSMark Murray *argv = cp2; 62481cb6ddcSMark Murray else if (is_unique(cp2, argv+1, argvp)) 62581cb6ddcSMark Murray *argvp++ = cp2; 62681cb6ddcSMark Murray if (c == ':') 62781cb6ddcSMark Murray break; 62881cb6ddcSMark Murray /* 62981cb6ddcSMark Murray * Skip multiple delimiters. Reset cp2 to 63081cb6ddcSMark Murray * the beginning of the next name. Reset n, 63181cb6ddcSMark Murray * the flag for names with spaces. 63281cb6ddcSMark Murray */ 63381cb6ddcSMark Murray while ((c = *cp) == '|') 63481cb6ddcSMark Murray cp++; 63581cb6ddcSMark Murray cp2 = cp; 63681cb6ddcSMark Murray n = 0; 63781cb6ddcSMark Murray } 63881cb6ddcSMark Murray /* 63981cb6ddcSMark Murray * Skip entries with spaces or non-ascii values. 64081cb6ddcSMark Murray * Convert lower case letters to upper case. 64181cb6ddcSMark Murray */ 64281cb6ddcSMark Murray if ((c == ' ') || !isascii(c)) 64381cb6ddcSMark Murray n = 1; 64481cb6ddcSMark Murray else if (islower(c)) 64581cb6ddcSMark Murray *cp = toupper(c); 64681cb6ddcSMark Murray } 64781cb6ddcSMark Murray 64881cb6ddcSMark Murray /* 64981cb6ddcSMark Murray * Check for an old V6 2 character name. If the second 65081cb6ddcSMark Murray * name points to the beginning of the buffer, and is 65181cb6ddcSMark Murray * only 2 characters long, move it to the end of the array. 65281cb6ddcSMark Murray */ 65381cb6ddcSMark Murray if ((argv[1] == buf) && (strlen(argv[1]) == 2)) { 65481cb6ddcSMark Murray --argvp; 65581cb6ddcSMark Murray for (avt = &argv[1]; avt < argvp; avt++) 65681cb6ddcSMark Murray *avt = *(avt+1); 65781cb6ddcSMark Murray *argvp++ = buf; 65881cb6ddcSMark Murray } 65981cb6ddcSMark Murray 66081cb6ddcSMark Murray /* 66181cb6ddcSMark Murray * Duplicate last name, for TTYPE option, and null 66281cb6ddcSMark Murray * terminate the array. If we didn't find a match on 66381cb6ddcSMark Murray * our terminal name, put that name at the beginning. 66481cb6ddcSMark Murray */ 66581cb6ddcSMark Murray cp = *(argvp-1); 66681cb6ddcSMark Murray *argvp++ = cp; 66781cb6ddcSMark Murray *argvp = 0; 66881cb6ddcSMark Murray 66981cb6ddcSMark Murray if (*argv == 0) { 67081cb6ddcSMark Murray if (name) 67181cb6ddcSMark Murray *argv = name; 67281cb6ddcSMark Murray else { 67381cb6ddcSMark Murray --argvp; 67481cb6ddcSMark Murray for (avt = argv; avt < argvp; avt++) 67581cb6ddcSMark Murray *avt = *(avt+1); 67681cb6ddcSMark Murray } 67781cb6ddcSMark Murray } 67881cb6ddcSMark Murray if (*argv) 6798fa113e5SMark Murray return((const char **)argv); 68081cb6ddcSMark Murray else 68181cb6ddcSMark Murray return(unknown); 68281cb6ddcSMark Murray } 68381cb6ddcSMark Murray 6848fa113e5SMark Murray static int 6858fa113e5SMark Murray is_unique(char *name, char **as, char **ae) 68681cb6ddcSMark Murray { 6878fa113e5SMark Murray char **ap; 6888fa113e5SMark Murray int n; 68981cb6ddcSMark Murray 69081cb6ddcSMark Murray n = strlen(name) + 1; 69181cb6ddcSMark Murray for (ap = as; ap < ae; ap++) 69281cb6ddcSMark Murray if (strncasecmp(*ap, name, n) == 0) 69381cb6ddcSMark Murray return(0); 69481cb6ddcSMark Murray return (1); 69581cb6ddcSMark Murray } 69681cb6ddcSMark Murray 69781cb6ddcSMark Murray #ifdef TERMCAP 69881cb6ddcSMark Murray char termbuf[1024]; 69981cb6ddcSMark Murray 70081cb6ddcSMark Murray /*ARGSUSED*/ 7018fa113e5SMark Murray static int 7028fa113e5SMark Murray setupterm(char *tname, int fd, int *errp) 70381cb6ddcSMark Murray { 70481cb6ddcSMark Murray if (tgetent(termbuf, tname) == 1) { 70581cb6ddcSMark Murray termbuf[1023] = '\0'; 70681cb6ddcSMark Murray if (errp) 70781cb6ddcSMark Murray *errp = 1; 70881cb6ddcSMark Murray return(0); 70981cb6ddcSMark Murray } 71081cb6ddcSMark Murray if (errp) 71181cb6ddcSMark Murray *errp = 0; 71281cb6ddcSMark Murray return(-1); 71381cb6ddcSMark Murray } 71481cb6ddcSMark Murray #else 71581cb6ddcSMark Murray #define termbuf ttytype 71681cb6ddcSMark Murray extern char ttytype[]; 71781cb6ddcSMark Murray #endif 71881cb6ddcSMark Murray 71981cb6ddcSMark Murray int resettermname = 1; 72081cb6ddcSMark Murray 7218fa113e5SMark Murray static const char * 7228fa113e5SMark Murray gettermname(void) 72381cb6ddcSMark Murray { 72481cb6ddcSMark Murray char *tname; 7258fa113e5SMark Murray static const char **tnamep = 0; 7268fa113e5SMark Murray static const char **next; 72781cb6ddcSMark Murray int err; 72881cb6ddcSMark Murray 72981cb6ddcSMark Murray if (resettermname) { 73081cb6ddcSMark Murray resettermname = 0; 73181cb6ddcSMark Murray if (tnamep && tnamep != unknown) 73281cb6ddcSMark Murray free(tnamep); 7338fa113e5SMark Murray if ((tname = env_getvalue("TERM")) && 73481cb6ddcSMark Murray (setupterm(tname, 1, &err) == 0)) { 73581cb6ddcSMark Murray tnamep = mklist(termbuf, tname); 73681cb6ddcSMark Murray } else { 73721f083c0SMark Murray if (tname && (strlen(tname) <= 40)) { 73881cb6ddcSMark Murray unknown[0] = tname; 73981cb6ddcSMark Murray upcase(tname); 74081cb6ddcSMark Murray } else 74181cb6ddcSMark Murray unknown[0] = name_unknown; 74281cb6ddcSMark Murray tnamep = unknown; 74381cb6ddcSMark Murray } 74481cb6ddcSMark Murray next = tnamep; 74581cb6ddcSMark Murray } 74681cb6ddcSMark Murray if (*next == 0) 74781cb6ddcSMark Murray next = tnamep; 74881cb6ddcSMark Murray return(*next++); 74981cb6ddcSMark Murray } 75081cb6ddcSMark Murray /* 75181cb6ddcSMark Murray * suboption() 75281cb6ddcSMark Murray * 75381cb6ddcSMark Murray * Look at the sub-option buffer, and try to be helpful to the other 75481cb6ddcSMark Murray * side. 75581cb6ddcSMark Murray * 75681cb6ddcSMark Murray * Currently we recognize: 75781cb6ddcSMark Murray * 75881cb6ddcSMark Murray * Terminal type, send request. 75981cb6ddcSMark Murray * Terminal speed (send request). 76081cb6ddcSMark Murray * Local flow control (is request). 76181cb6ddcSMark Murray * Linemode 76281cb6ddcSMark Murray */ 76381cb6ddcSMark Murray 76481cb6ddcSMark Murray static void 7658fa113e5SMark Murray suboption(void) 76681cb6ddcSMark Murray { 76781cb6ddcSMark Murray unsigned char subchar; 76881cb6ddcSMark Murray 76981cb6ddcSMark Murray printsub('<', subbuffer, SB_LEN()+2); 77081cb6ddcSMark Murray switch (subchar = SB_GET()) { 77181cb6ddcSMark Murray case TELOPT_TTYPE: 77281cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_TTYPE)) 77381cb6ddcSMark Murray return; 77481cb6ddcSMark Murray if (SB_EOF() || SB_GET() != TELQUAL_SEND) { 77581cb6ddcSMark Murray return; 77681cb6ddcSMark Murray } else { 7778fa113e5SMark Murray const char *name; 77881cb6ddcSMark Murray unsigned char temp[50]; 77981cb6ddcSMark Murray int len; 78081cb6ddcSMark Murray 78181cb6ddcSMark Murray name = gettermname(); 78281cb6ddcSMark Murray len = strlen(name) + 4 + 2; 78381cb6ddcSMark Murray if (len < NETROOM()) { 784e68ce1ccSPhilip Paeps snprintf(temp, sizeof(temp), "%c%c%c%c%s%c%c", IAC, SB, TELOPT_TTYPE, 78581cb6ddcSMark Murray TELQUAL_IS, name, IAC, SE); 78681cb6ddcSMark Murray ring_supply_data(&netoring, temp, len); 78781cb6ddcSMark Murray printsub('>', &temp[2], len-2); 78881cb6ddcSMark Murray } else { 78981cb6ddcSMark Murray ExitString("No room in buffer for terminal type.\n", 1); 79081cb6ddcSMark Murray /*NOTREACHED*/ 79181cb6ddcSMark Murray } 79281cb6ddcSMark Murray } 79381cb6ddcSMark Murray break; 79481cb6ddcSMark Murray case TELOPT_TSPEED: 79581cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_TSPEED)) 79681cb6ddcSMark Murray return; 79781cb6ddcSMark Murray if (SB_EOF()) 79881cb6ddcSMark Murray return; 79981cb6ddcSMark Murray if (SB_GET() == TELQUAL_SEND) { 80081cb6ddcSMark Murray long ospeed, ispeed; 80181cb6ddcSMark Murray unsigned char temp[50]; 80281cb6ddcSMark Murray int len; 80381cb6ddcSMark Murray 80481cb6ddcSMark Murray TerminalSpeeds(&ispeed, &ospeed); 80581cb6ddcSMark Murray 806e68ce1ccSPhilip Paeps snprintf((char *)temp, sizeof(temp), "%c%c%c%c%ld,%ld%c%c", IAC, SB, TELOPT_TSPEED, 80781cb6ddcSMark Murray TELQUAL_IS, ospeed, ispeed, IAC, SE); 80881cb6ddcSMark Murray len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */ 80981cb6ddcSMark Murray 81081cb6ddcSMark Murray if (len < NETROOM()) { 81181cb6ddcSMark Murray ring_supply_data(&netoring, temp, len); 81281cb6ddcSMark Murray printsub('>', temp+2, len - 2); 81381cb6ddcSMark Murray } 81481cb6ddcSMark Murray /*@*/ else printf("lm_will: not enough room in buffer\n"); 81581cb6ddcSMark Murray } 81681cb6ddcSMark Murray break; 81781cb6ddcSMark Murray case TELOPT_LFLOW: 81881cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_LFLOW)) 81981cb6ddcSMark Murray return; 82081cb6ddcSMark Murray if (SB_EOF()) 82181cb6ddcSMark Murray return; 82281cb6ddcSMark Murray switch(SB_GET()) { 82381cb6ddcSMark Murray case LFLOW_RESTART_ANY: 82481cb6ddcSMark Murray restartany = 1; 82581cb6ddcSMark Murray break; 82681cb6ddcSMark Murray case LFLOW_RESTART_XON: 82781cb6ddcSMark Murray restartany = 0; 82881cb6ddcSMark Murray break; 82981cb6ddcSMark Murray case LFLOW_ON: 83081cb6ddcSMark Murray localflow = 1; 83181cb6ddcSMark Murray break; 83281cb6ddcSMark Murray case LFLOW_OFF: 83381cb6ddcSMark Murray localflow = 0; 83481cb6ddcSMark Murray break; 83581cb6ddcSMark Murray default: 83681cb6ddcSMark Murray return; 83781cb6ddcSMark Murray } 83881cb6ddcSMark Murray setcommandmode(); 83981cb6ddcSMark Murray setconnmode(0); 84081cb6ddcSMark Murray break; 84181cb6ddcSMark Murray 84281cb6ddcSMark Murray case TELOPT_LINEMODE: 84381cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_LINEMODE)) 84481cb6ddcSMark Murray return; 84581cb6ddcSMark Murray if (SB_EOF()) 84681cb6ddcSMark Murray return; 84781cb6ddcSMark Murray switch (SB_GET()) { 84881cb6ddcSMark Murray case WILL: 84981cb6ddcSMark Murray lm_will(subpointer, SB_LEN()); 85081cb6ddcSMark Murray break; 85181cb6ddcSMark Murray case WONT: 85281cb6ddcSMark Murray lm_wont(subpointer, SB_LEN()); 85381cb6ddcSMark Murray break; 85481cb6ddcSMark Murray case DO: 85581cb6ddcSMark Murray lm_do(subpointer, SB_LEN()); 85681cb6ddcSMark Murray break; 85781cb6ddcSMark Murray case DONT: 85881cb6ddcSMark Murray lm_dont(subpointer, SB_LEN()); 85981cb6ddcSMark Murray break; 86081cb6ddcSMark Murray case LM_SLC: 86181cb6ddcSMark Murray slc(subpointer, SB_LEN()); 86281cb6ddcSMark Murray break; 86381cb6ddcSMark Murray case LM_MODE: 86481cb6ddcSMark Murray lm_mode(subpointer, SB_LEN(), 0); 86581cb6ddcSMark Murray break; 86681cb6ddcSMark Murray default: 86781cb6ddcSMark Murray break; 86881cb6ddcSMark Murray } 86981cb6ddcSMark Murray break; 87081cb6ddcSMark Murray 87181cb6ddcSMark Murray #ifdef OLD_ENVIRON 87281cb6ddcSMark Murray case TELOPT_OLD_ENVIRON: 87381cb6ddcSMark Murray #endif 87481cb6ddcSMark Murray case TELOPT_NEW_ENVIRON: 87581cb6ddcSMark Murray if (SB_EOF()) 87681cb6ddcSMark Murray return; 87781cb6ddcSMark Murray switch(SB_PEEK()) { 87881cb6ddcSMark Murray case TELQUAL_IS: 87981cb6ddcSMark Murray case TELQUAL_INFO: 88081cb6ddcSMark Murray if (my_want_state_is_dont(subchar)) 88181cb6ddcSMark Murray return; 88281cb6ddcSMark Murray break; 88381cb6ddcSMark Murray case TELQUAL_SEND: 88481cb6ddcSMark Murray if (my_want_state_is_wont(subchar)) { 88581cb6ddcSMark Murray return; 88681cb6ddcSMark Murray } 88781cb6ddcSMark Murray break; 88881cb6ddcSMark Murray default: 88981cb6ddcSMark Murray return; 89081cb6ddcSMark Murray } 89181cb6ddcSMark Murray env_opt(subpointer, SB_LEN()); 89281cb6ddcSMark Murray break; 89381cb6ddcSMark Murray 89481cb6ddcSMark Murray case TELOPT_XDISPLOC: 89581cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_XDISPLOC)) 89681cb6ddcSMark Murray return; 89781cb6ddcSMark Murray if (SB_EOF()) 89881cb6ddcSMark Murray return; 89981cb6ddcSMark Murray if (SB_GET() == TELQUAL_SEND) { 90081cb6ddcSMark Murray unsigned char temp[50], *dp; 90181cb6ddcSMark Murray int len; 90281cb6ddcSMark Murray 9038fa113e5SMark Murray if ((dp = env_getvalue("DISPLAY")) == NULL || 904579c78c7SKris Kennaway strlen(dp) > sizeof(temp) - 7) { 90581cb6ddcSMark Murray /* 90681cb6ddcSMark Murray * Something happened, we no longer have a DISPLAY 907579c78c7SKris Kennaway * variable. Or it is too long. So, turn off the option. 90881cb6ddcSMark Murray */ 90981cb6ddcSMark Murray send_wont(TELOPT_XDISPLOC, 1); 91081cb6ddcSMark Murray break; 91181cb6ddcSMark Murray } 9128fa113e5SMark Murray snprintf(temp, sizeof(temp), "%c%c%c%c%s%c%c", IAC, SB, 913579c78c7SKris Kennaway TELOPT_XDISPLOC, TELQUAL_IS, dp, IAC, SE); 91481cb6ddcSMark Murray len = strlen((char *)temp+4) + 4; /* temp[3] is 0 ... */ 91581cb6ddcSMark Murray 91681cb6ddcSMark Murray if (len < NETROOM()) { 91781cb6ddcSMark Murray ring_supply_data(&netoring, temp, len); 91881cb6ddcSMark Murray printsub('>', temp+2, len - 2); 91981cb6ddcSMark Murray } 92081cb6ddcSMark Murray /*@*/ else printf("lm_will: not enough room in buffer\n"); 92181cb6ddcSMark Murray } 92281cb6ddcSMark Murray break; 92381cb6ddcSMark Murray 9248fa113e5SMark Murray #ifdef AUTHENTICATION 92581cb6ddcSMark Murray case TELOPT_AUTHENTICATION: { 92681cb6ddcSMark Murray if (!autologin) 92781cb6ddcSMark Murray break; 92881cb6ddcSMark Murray if (SB_EOF()) 92981cb6ddcSMark Murray return; 93081cb6ddcSMark Murray switch(SB_GET()) { 93181cb6ddcSMark Murray case TELQUAL_IS: 93281cb6ddcSMark Murray if (my_want_state_is_dont(TELOPT_AUTHENTICATION)) 93381cb6ddcSMark Murray return; 93481cb6ddcSMark Murray auth_is(subpointer, SB_LEN()); 93581cb6ddcSMark Murray break; 93681cb6ddcSMark Murray case TELQUAL_SEND: 93781cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_AUTHENTICATION)) 93881cb6ddcSMark Murray return; 93981cb6ddcSMark Murray auth_send(subpointer, SB_LEN()); 94081cb6ddcSMark Murray break; 94181cb6ddcSMark Murray case TELQUAL_REPLY: 94281cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_AUTHENTICATION)) 94381cb6ddcSMark Murray return; 94481cb6ddcSMark Murray auth_reply(subpointer, SB_LEN()); 94581cb6ddcSMark Murray break; 94681cb6ddcSMark Murray case TELQUAL_NAME: 94781cb6ddcSMark Murray if (my_want_state_is_dont(TELOPT_AUTHENTICATION)) 94881cb6ddcSMark Murray return; 94981cb6ddcSMark Murray auth_name(subpointer, SB_LEN()); 95081cb6ddcSMark Murray break; 95181cb6ddcSMark Murray } 95281cb6ddcSMark Murray } 95381cb6ddcSMark Murray break; 95481cb6ddcSMark Murray #endif 95581cb6ddcSMark Murray #ifdef ENCRYPTION 95681cb6ddcSMark Murray case TELOPT_ENCRYPT: 95781cb6ddcSMark Murray if (SB_EOF()) 95881cb6ddcSMark Murray return; 95981cb6ddcSMark Murray switch(SB_GET()) { 96081cb6ddcSMark Murray case ENCRYPT_START: 96181cb6ddcSMark Murray if (my_want_state_is_dont(TELOPT_ENCRYPT)) 96281cb6ddcSMark Murray return; 96381cb6ddcSMark Murray encrypt_start(subpointer, SB_LEN()); 96481cb6ddcSMark Murray break; 96581cb6ddcSMark Murray case ENCRYPT_END: 96681cb6ddcSMark Murray if (my_want_state_is_dont(TELOPT_ENCRYPT)) 96781cb6ddcSMark Murray return; 96881cb6ddcSMark Murray encrypt_end(); 96981cb6ddcSMark Murray break; 97081cb6ddcSMark Murray case ENCRYPT_SUPPORT: 97181cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_ENCRYPT)) 97281cb6ddcSMark Murray return; 97381cb6ddcSMark Murray encrypt_support(subpointer, SB_LEN()); 97481cb6ddcSMark Murray break; 97581cb6ddcSMark Murray case ENCRYPT_REQSTART: 97681cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_ENCRYPT)) 97781cb6ddcSMark Murray return; 97881cb6ddcSMark Murray encrypt_request_start(subpointer, SB_LEN()); 97981cb6ddcSMark Murray break; 98081cb6ddcSMark Murray case ENCRYPT_REQEND: 98181cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_ENCRYPT)) 98281cb6ddcSMark Murray return; 98381cb6ddcSMark Murray /* 98481cb6ddcSMark Murray * We can always send an REQEND so that we cannot 98581cb6ddcSMark Murray * get stuck encrypting. We should only get this 98681cb6ddcSMark Murray * if we have been able to get in the correct mode 98781cb6ddcSMark Murray * anyhow. 98881cb6ddcSMark Murray */ 98981cb6ddcSMark Murray encrypt_request_end(); 99081cb6ddcSMark Murray break; 99181cb6ddcSMark Murray case ENCRYPT_IS: 99281cb6ddcSMark Murray if (my_want_state_is_dont(TELOPT_ENCRYPT)) 99381cb6ddcSMark Murray return; 99481cb6ddcSMark Murray encrypt_is(subpointer, SB_LEN()); 99581cb6ddcSMark Murray break; 99681cb6ddcSMark Murray case ENCRYPT_REPLY: 99781cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_ENCRYPT)) 99881cb6ddcSMark Murray return; 99981cb6ddcSMark Murray encrypt_reply(subpointer, SB_LEN()); 100081cb6ddcSMark Murray break; 100181cb6ddcSMark Murray case ENCRYPT_ENC_KEYID: 100281cb6ddcSMark Murray if (my_want_state_is_dont(TELOPT_ENCRYPT)) 100381cb6ddcSMark Murray return; 100481cb6ddcSMark Murray encrypt_enc_keyid(subpointer, SB_LEN()); 100581cb6ddcSMark Murray break; 100681cb6ddcSMark Murray case ENCRYPT_DEC_KEYID: 100781cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_ENCRYPT)) 100881cb6ddcSMark Murray return; 100981cb6ddcSMark Murray encrypt_dec_keyid(subpointer, SB_LEN()); 101081cb6ddcSMark Murray break; 101181cb6ddcSMark Murray default: 101281cb6ddcSMark Murray break; 101381cb6ddcSMark Murray } 101481cb6ddcSMark Murray break; 101581cb6ddcSMark Murray #endif /* ENCRYPTION */ 101681cb6ddcSMark Murray default: 101781cb6ddcSMark Murray break; 101881cb6ddcSMark Murray } 101981cb6ddcSMark Murray } 102081cb6ddcSMark Murray 102181cb6ddcSMark Murray static unsigned char str_lm[] = { IAC, SB, TELOPT_LINEMODE, 0, 0, IAC, SE }; 102281cb6ddcSMark Murray 102381cb6ddcSMark Murray void 10248fa113e5SMark Murray lm_will(unsigned char *cmd, int len) 102581cb6ddcSMark Murray { 102681cb6ddcSMark Murray if (len < 1) { 102781cb6ddcSMark Murray /*@*/ printf("lm_will: no command!!!\n"); /* Should not happen... */ 102881cb6ddcSMark Murray return; 102981cb6ddcSMark Murray } 103081cb6ddcSMark Murray switch(cmd[0]) { 103181cb6ddcSMark Murray case LM_FORWARDMASK: /* We shouldn't ever get this... */ 103281cb6ddcSMark Murray default: 103381cb6ddcSMark Murray str_lm[3] = DONT; 103481cb6ddcSMark Murray str_lm[4] = cmd[0]; 10358fa113e5SMark Murray if (NETROOM() > (int)sizeof(str_lm)) { 103681cb6ddcSMark Murray ring_supply_data(&netoring, str_lm, sizeof(str_lm)); 103781cb6ddcSMark Murray printsub('>', &str_lm[2], sizeof(str_lm)-2); 103881cb6ddcSMark Murray } 103981cb6ddcSMark Murray /*@*/ else printf("lm_will: not enough room in buffer\n"); 104081cb6ddcSMark Murray break; 104181cb6ddcSMark Murray } 104281cb6ddcSMark Murray } 104381cb6ddcSMark Murray 104481cb6ddcSMark Murray void 10458fa113e5SMark Murray lm_wont(unsigned char *cmd, int len) 104681cb6ddcSMark Murray { 104781cb6ddcSMark Murray if (len < 1) { 104881cb6ddcSMark Murray /*@*/ printf("lm_wont: no command!!!\n"); /* Should not happen... */ 104981cb6ddcSMark Murray return; 105081cb6ddcSMark Murray } 105181cb6ddcSMark Murray switch(cmd[0]) { 105281cb6ddcSMark Murray case LM_FORWARDMASK: /* We shouldn't ever get this... */ 105381cb6ddcSMark Murray default: 105481cb6ddcSMark Murray /* We are always DONT, so don't respond */ 105581cb6ddcSMark Murray return; 105681cb6ddcSMark Murray } 105781cb6ddcSMark Murray } 105881cb6ddcSMark Murray 105981cb6ddcSMark Murray void 10608fa113e5SMark Murray lm_do(unsigned char *cmd, int len) 106181cb6ddcSMark Murray { 106281cb6ddcSMark Murray if (len < 1) { 106381cb6ddcSMark Murray /*@*/ printf("lm_do: no command!!!\n"); /* Should not happen... */ 106481cb6ddcSMark Murray return; 106581cb6ddcSMark Murray } 106681cb6ddcSMark Murray switch(cmd[0]) { 106781cb6ddcSMark Murray case LM_FORWARDMASK: 106881cb6ddcSMark Murray default: 106981cb6ddcSMark Murray str_lm[3] = WONT; 107081cb6ddcSMark Murray str_lm[4] = cmd[0]; 10718fa113e5SMark Murray if (NETROOM() > (int)sizeof(str_lm)) { 107281cb6ddcSMark Murray ring_supply_data(&netoring, str_lm, sizeof(str_lm)); 107381cb6ddcSMark Murray printsub('>', &str_lm[2], sizeof(str_lm)-2); 107481cb6ddcSMark Murray } 107581cb6ddcSMark Murray /*@*/ else printf("lm_do: not enough room in buffer\n"); 107681cb6ddcSMark Murray break; 107781cb6ddcSMark Murray } 107881cb6ddcSMark Murray } 107981cb6ddcSMark Murray 108081cb6ddcSMark Murray void 10818fa113e5SMark Murray lm_dont(unsigned char *cmd, int len) 108281cb6ddcSMark Murray { 108381cb6ddcSMark Murray if (len < 1) { 108481cb6ddcSMark Murray /*@*/ printf("lm_dont: no command!!!\n"); /* Should not happen... */ 108581cb6ddcSMark Murray return; 108681cb6ddcSMark Murray } 108781cb6ddcSMark Murray switch(cmd[0]) { 108881cb6ddcSMark Murray case LM_FORWARDMASK: 108981cb6ddcSMark Murray default: 109081cb6ddcSMark Murray /* we are always WONT, so don't respond */ 109181cb6ddcSMark Murray break; 109281cb6ddcSMark Murray } 109381cb6ddcSMark Murray } 109481cb6ddcSMark Murray 109581cb6ddcSMark Murray static unsigned char str_lm_mode[] = { 109681cb6ddcSMark Murray IAC, SB, TELOPT_LINEMODE, LM_MODE, 0, IAC, SE 109781cb6ddcSMark Murray }; 109881cb6ddcSMark Murray 109981cb6ddcSMark Murray void 11008fa113e5SMark Murray lm_mode(unsigned char *cmd, int len, int init) 110181cb6ddcSMark Murray { 110281cb6ddcSMark Murray if (len != 1) 110381cb6ddcSMark Murray return; 110481cb6ddcSMark Murray if ((linemode&MODE_MASK&~MODE_ACK) == *cmd) 110581cb6ddcSMark Murray return; 110681cb6ddcSMark Murray if (*cmd&MODE_ACK) 110781cb6ddcSMark Murray return; 110881cb6ddcSMark Murray linemode = *cmd&(MODE_MASK&~MODE_ACK); 110981cb6ddcSMark Murray str_lm_mode[4] = linemode; 111081cb6ddcSMark Murray if (!init) 111181cb6ddcSMark Murray str_lm_mode[4] |= MODE_ACK; 11128fa113e5SMark Murray if (NETROOM() > (int)sizeof(str_lm_mode)) { 111381cb6ddcSMark Murray ring_supply_data(&netoring, str_lm_mode, sizeof(str_lm_mode)); 111481cb6ddcSMark Murray printsub('>', &str_lm_mode[2], sizeof(str_lm_mode)-2); 111581cb6ddcSMark Murray } 111681cb6ddcSMark Murray /*@*/ else printf("lm_mode: not enough room in buffer\n"); 111781cb6ddcSMark Murray setconnmode(0); /* set changed mode */ 111881cb6ddcSMark Murray } 111981cb6ddcSMark Murray 1120ad11def5SEnji Cooper 112181cb6ddcSMark Murray 112281cb6ddcSMark Murray /* 112381cb6ddcSMark Murray * slc() 112481cb6ddcSMark Murray * Handle special character suboption of LINEMODE. 112581cb6ddcSMark Murray */ 112681cb6ddcSMark Murray 112781cb6ddcSMark Murray struct spc { 112881cb6ddcSMark Murray cc_t val; 112981cb6ddcSMark Murray cc_t *valp; 113081cb6ddcSMark Murray char flags; /* Current flags & level */ 113181cb6ddcSMark Murray char mylevel; /* Maximum level & flags */ 113281cb6ddcSMark Murray } spc_data[NSLC+1]; 113381cb6ddcSMark Murray 113481cb6ddcSMark Murray #define SLC_IMPORT 0 113581cb6ddcSMark Murray #define SLC_EXPORT 1 113681cb6ddcSMark Murray #define SLC_RVALUE 2 113781cb6ddcSMark Murray static int slc_mode = SLC_EXPORT; 113881cb6ddcSMark Murray 113981cb6ddcSMark Murray void 11408fa113e5SMark Murray slc_init(void) 114181cb6ddcSMark Murray { 11428fa113e5SMark Murray struct spc *spcp; 114381cb6ddcSMark Murray 114481cb6ddcSMark Murray localchars = 1; 114581cb6ddcSMark Murray for (spcp = spc_data; spcp < &spc_data[NSLC+1]; spcp++) { 114681cb6ddcSMark Murray spcp->val = 0; 114781cb6ddcSMark Murray spcp->valp = 0; 114881cb6ddcSMark Murray spcp->flags = spcp->mylevel = SLC_NOSUPPORT; 114981cb6ddcSMark Murray } 115081cb6ddcSMark Murray 115181cb6ddcSMark Murray #define initfunc(func, flags) { \ 115281cb6ddcSMark Murray spcp = &spc_data[func]; \ 115304c426ccSMark Murray if ((spcp->valp = tcval(func))) { \ 115481cb6ddcSMark Murray spcp->val = *spcp->valp; \ 115581cb6ddcSMark Murray spcp->mylevel = SLC_VARIABLE|flags; \ 115681cb6ddcSMark Murray } else { \ 115781cb6ddcSMark Murray spcp->val = 0; \ 115881cb6ddcSMark Murray spcp->mylevel = SLC_DEFAULT; \ 115981cb6ddcSMark Murray } \ 116081cb6ddcSMark Murray } 116181cb6ddcSMark Murray 116281cb6ddcSMark Murray initfunc(SLC_SYNCH, 0); 116381cb6ddcSMark Murray /* No BRK */ 116481cb6ddcSMark Murray initfunc(SLC_AO, 0); 116581cb6ddcSMark Murray initfunc(SLC_AYT, 0); 116681cb6ddcSMark Murray /* No EOR */ 116781cb6ddcSMark Murray initfunc(SLC_ABORT, SLC_FLUSHIN|SLC_FLUSHOUT); 116881cb6ddcSMark Murray initfunc(SLC_EOF, 0); 116981cb6ddcSMark Murray #ifndef SYSV_TERMIO 117081cb6ddcSMark Murray initfunc(SLC_SUSP, SLC_FLUSHIN); 117181cb6ddcSMark Murray #endif 117281cb6ddcSMark Murray initfunc(SLC_EC, 0); 117381cb6ddcSMark Murray initfunc(SLC_EL, 0); 117481cb6ddcSMark Murray #ifndef SYSV_TERMIO 117581cb6ddcSMark Murray initfunc(SLC_EW, 0); 117681cb6ddcSMark Murray initfunc(SLC_RP, 0); 117781cb6ddcSMark Murray initfunc(SLC_LNEXT, 0); 117881cb6ddcSMark Murray #endif 117981cb6ddcSMark Murray initfunc(SLC_XON, 0); 118081cb6ddcSMark Murray initfunc(SLC_XOFF, 0); 118181cb6ddcSMark Murray #ifdef SYSV_TERMIO 118281cb6ddcSMark Murray spc_data[SLC_XON].mylevel = SLC_CANTCHANGE; 118381cb6ddcSMark Murray spc_data[SLC_XOFF].mylevel = SLC_CANTCHANGE; 118481cb6ddcSMark Murray #endif 118581cb6ddcSMark Murray initfunc(SLC_FORW1, 0); 118681cb6ddcSMark Murray #ifdef USE_TERMIO 118781cb6ddcSMark Murray initfunc(SLC_FORW2, 0); 118881cb6ddcSMark Murray /* No FORW2 */ 118981cb6ddcSMark Murray #endif 119081cb6ddcSMark Murray 119181cb6ddcSMark Murray initfunc(SLC_IP, SLC_FLUSHIN|SLC_FLUSHOUT); 119281cb6ddcSMark Murray #undef initfunc 119381cb6ddcSMark Murray 119481cb6ddcSMark Murray if (slc_mode == SLC_EXPORT) 119581cb6ddcSMark Murray slc_export(); 119681cb6ddcSMark Murray else 119781cb6ddcSMark Murray slc_import(1); 119881cb6ddcSMark Murray 119981cb6ddcSMark Murray } 120081cb6ddcSMark Murray 120181cb6ddcSMark Murray void 12028fa113e5SMark Murray slcstate(void) 120381cb6ddcSMark Murray { 120481cb6ddcSMark Murray printf("Special characters are %s values\n", 120581cb6ddcSMark Murray slc_mode == SLC_IMPORT ? "remote default" : 120681cb6ddcSMark Murray slc_mode == SLC_EXPORT ? "local" : 120781cb6ddcSMark Murray "remote"); 120881cb6ddcSMark Murray } 120981cb6ddcSMark Murray 121081cb6ddcSMark Murray void 12118fa113e5SMark Murray slc_mode_export(void) 121281cb6ddcSMark Murray { 121381cb6ddcSMark Murray slc_mode = SLC_EXPORT; 121481cb6ddcSMark Murray if (my_state_is_will(TELOPT_LINEMODE)) 121581cb6ddcSMark Murray slc_export(); 121681cb6ddcSMark Murray } 121781cb6ddcSMark Murray 121881cb6ddcSMark Murray void 12198fa113e5SMark Murray slc_mode_import(int def) 122081cb6ddcSMark Murray { 122181cb6ddcSMark Murray slc_mode = def ? SLC_IMPORT : SLC_RVALUE; 122281cb6ddcSMark Murray if (my_state_is_will(TELOPT_LINEMODE)) 122381cb6ddcSMark Murray slc_import(def); 122481cb6ddcSMark Murray } 122581cb6ddcSMark Murray 122681cb6ddcSMark Murray unsigned char slc_import_val[] = { 122781cb6ddcSMark Murray IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_VARIABLE, 0, IAC, SE 122881cb6ddcSMark Murray }; 122981cb6ddcSMark Murray unsigned char slc_import_def[] = { 123081cb6ddcSMark Murray IAC, SB, TELOPT_LINEMODE, LM_SLC, 0, SLC_DEFAULT, 0, IAC, SE 123181cb6ddcSMark Murray }; 123281cb6ddcSMark Murray 123381cb6ddcSMark Murray void 12348fa113e5SMark Murray slc_import(int def) 123581cb6ddcSMark Murray { 12368fa113e5SMark Murray if (NETROOM() > (int)sizeof(slc_import_val)) { 123781cb6ddcSMark Murray if (def) { 123881cb6ddcSMark Murray ring_supply_data(&netoring, slc_import_def, sizeof(slc_import_def)); 123981cb6ddcSMark Murray printsub('>', &slc_import_def[2], sizeof(slc_import_def)-2); 124081cb6ddcSMark Murray } else { 124181cb6ddcSMark Murray ring_supply_data(&netoring, slc_import_val, sizeof(slc_import_val)); 124281cb6ddcSMark Murray printsub('>', &slc_import_val[2], sizeof(slc_import_val)-2); 124381cb6ddcSMark Murray } 124481cb6ddcSMark Murray } 124581cb6ddcSMark Murray /*@*/ else printf("slc_import: not enough room\n"); 124681cb6ddcSMark Murray } 124781cb6ddcSMark Murray 124881cb6ddcSMark Murray void 12498fa113e5SMark Murray slc_export(void) 125081cb6ddcSMark Murray { 12518fa113e5SMark Murray struct spc *spcp; 125281cb6ddcSMark Murray 125381cb6ddcSMark Murray TerminalDefaultChars(); 125481cb6ddcSMark Murray 125581cb6ddcSMark Murray slc_start_reply(); 125681cb6ddcSMark Murray for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) { 125781cb6ddcSMark Murray if (spcp->mylevel != SLC_NOSUPPORT) { 125881cb6ddcSMark Murray if (spcp->val == (cc_t)(_POSIX_VDISABLE)) 125981cb6ddcSMark Murray spcp->flags = SLC_NOSUPPORT; 126081cb6ddcSMark Murray else 126181cb6ddcSMark Murray spcp->flags = spcp->mylevel; 126281cb6ddcSMark Murray if (spcp->valp) 126381cb6ddcSMark Murray spcp->val = *spcp->valp; 126481cb6ddcSMark Murray slc_add_reply(spcp - spc_data, spcp->flags, spcp->val); 126581cb6ddcSMark Murray } 126681cb6ddcSMark Murray } 126781cb6ddcSMark Murray slc_end_reply(); 126881cb6ddcSMark Murray (void)slc_update(); 126981cb6ddcSMark Murray setconnmode(1); /* Make sure the character values are set */ 127081cb6ddcSMark Murray } 127181cb6ddcSMark Murray 127281cb6ddcSMark Murray void 12738fa113e5SMark Murray slc(unsigned char *cp, int len) 127481cb6ddcSMark Murray { 12758fa113e5SMark Murray struct spc *spcp; 12768fa113e5SMark Murray int func,level; 127781cb6ddcSMark Murray 127881cb6ddcSMark Murray slc_start_reply(); 127981cb6ddcSMark Murray 128081cb6ddcSMark Murray for (; len >= 3; len -=3, cp +=3) { 128181cb6ddcSMark Murray 128281cb6ddcSMark Murray func = cp[SLC_FUNC]; 128381cb6ddcSMark Murray 128481cb6ddcSMark Murray if (func == 0) { 128581cb6ddcSMark Murray /* 128681cb6ddcSMark Murray * Client side: always ignore 0 function. 128781cb6ddcSMark Murray */ 128881cb6ddcSMark Murray continue; 128981cb6ddcSMark Murray } 129081cb6ddcSMark Murray if (func > NSLC) { 129181cb6ddcSMark Murray if ((cp[SLC_FLAGS] & SLC_LEVELBITS) != SLC_NOSUPPORT) 129281cb6ddcSMark Murray slc_add_reply(func, SLC_NOSUPPORT, 0); 129381cb6ddcSMark Murray continue; 129481cb6ddcSMark Murray } 129581cb6ddcSMark Murray 129681cb6ddcSMark Murray spcp = &spc_data[func]; 129781cb6ddcSMark Murray 129881cb6ddcSMark Murray level = cp[SLC_FLAGS]&(SLC_LEVELBITS|SLC_ACK); 129981cb6ddcSMark Murray 130081cb6ddcSMark Murray if ((cp[SLC_VALUE] == (unsigned char)spcp->val) && 130181cb6ddcSMark Murray ((level&SLC_LEVELBITS) == (spcp->flags&SLC_LEVELBITS))) { 130281cb6ddcSMark Murray continue; 130381cb6ddcSMark Murray } 130481cb6ddcSMark Murray 130581cb6ddcSMark Murray if (level == (SLC_DEFAULT|SLC_ACK)) { 130681cb6ddcSMark Murray /* 130781cb6ddcSMark Murray * This is an error condition, the SLC_ACK 130881cb6ddcSMark Murray * bit should never be set for the SLC_DEFAULT 130981cb6ddcSMark Murray * level. Our best guess to recover is to 131081cb6ddcSMark Murray * ignore the SLC_ACK bit. 131181cb6ddcSMark Murray */ 131281cb6ddcSMark Murray cp[SLC_FLAGS] &= ~SLC_ACK; 131381cb6ddcSMark Murray } 131481cb6ddcSMark Murray 131581cb6ddcSMark Murray if (level == ((spcp->flags&SLC_LEVELBITS)|SLC_ACK)) { 131681cb6ddcSMark Murray spcp->val = (cc_t)cp[SLC_VALUE]; 131781cb6ddcSMark Murray spcp->flags = cp[SLC_FLAGS]; /* include SLC_ACK */ 131881cb6ddcSMark Murray continue; 131981cb6ddcSMark Murray } 132081cb6ddcSMark Murray 132181cb6ddcSMark Murray level &= ~SLC_ACK; 132281cb6ddcSMark Murray 132381cb6ddcSMark Murray if (level <= (spcp->mylevel&SLC_LEVELBITS)) { 132481cb6ddcSMark Murray spcp->flags = cp[SLC_FLAGS]|SLC_ACK; 132581cb6ddcSMark Murray spcp->val = (cc_t)cp[SLC_VALUE]; 132681cb6ddcSMark Murray } 132781cb6ddcSMark Murray if (level == SLC_DEFAULT) { 132881cb6ddcSMark Murray if ((spcp->mylevel&SLC_LEVELBITS) != SLC_DEFAULT) 132981cb6ddcSMark Murray spcp->flags = spcp->mylevel; 133081cb6ddcSMark Murray else 133181cb6ddcSMark Murray spcp->flags = SLC_NOSUPPORT; 133281cb6ddcSMark Murray } 133381cb6ddcSMark Murray slc_add_reply(func, spcp->flags, spcp->val); 133481cb6ddcSMark Murray } 133581cb6ddcSMark Murray slc_end_reply(); 133681cb6ddcSMark Murray if (slc_update()) 133781cb6ddcSMark Murray setconnmode(1); /* set the new character values */ 133881cb6ddcSMark Murray } 133981cb6ddcSMark Murray 134081cb6ddcSMark Murray void 13418fa113e5SMark Murray slc_check(void) 134281cb6ddcSMark Murray { 13438fa113e5SMark Murray struct spc *spcp; 134481cb6ddcSMark Murray 134581cb6ddcSMark Murray slc_start_reply(); 134681cb6ddcSMark Murray for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) { 134781cb6ddcSMark Murray if (spcp->valp && spcp->val != *spcp->valp) { 134881cb6ddcSMark Murray spcp->val = *spcp->valp; 134981cb6ddcSMark Murray if (spcp->val == (cc_t)(_POSIX_VDISABLE)) 135081cb6ddcSMark Murray spcp->flags = SLC_NOSUPPORT; 135181cb6ddcSMark Murray else 135281cb6ddcSMark Murray spcp->flags = spcp->mylevel; 135381cb6ddcSMark Murray slc_add_reply(spcp - spc_data, spcp->flags, spcp->val); 135481cb6ddcSMark Murray } 135581cb6ddcSMark Murray } 135681cb6ddcSMark Murray slc_end_reply(); 135781cb6ddcSMark Murray setconnmode(1); 135881cb6ddcSMark Murray } 135981cb6ddcSMark Murray 136081cb6ddcSMark Murray unsigned char slc_reply[128]; 136114aab889SJacques Vidrine unsigned char const * const slc_reply_eom = &slc_reply[sizeof(slc_reply)]; 136281cb6ddcSMark Murray unsigned char *slc_replyp; 136381cb6ddcSMark Murray 136481cb6ddcSMark Murray void 13658fa113e5SMark Murray slc_start_reply(void) 136681cb6ddcSMark Murray { 136781cb6ddcSMark Murray slc_replyp = slc_reply; 136881cb6ddcSMark Murray *slc_replyp++ = IAC; 136981cb6ddcSMark Murray *slc_replyp++ = SB; 137081cb6ddcSMark Murray *slc_replyp++ = TELOPT_LINEMODE; 137181cb6ddcSMark Murray *slc_replyp++ = LM_SLC; 137281cb6ddcSMark Murray } 137381cb6ddcSMark Murray 137481cb6ddcSMark Murray void 13758fa113e5SMark Murray slc_add_reply(unsigned char func, unsigned char flags, cc_t value) 137681cb6ddcSMark Murray { 137714aab889SJacques Vidrine /* A sequence of up to 6 bytes my be written for this member of the SLC 137814aab889SJacques Vidrine * suboption list by this function. The end of negotiation command, 137914aab889SJacques Vidrine * which is written by slc_end_reply(), will require 2 additional 138014aab889SJacques Vidrine * bytes. Do not proceed unless there is sufficient space for these 138114aab889SJacques Vidrine * items. 138214aab889SJacques Vidrine */ 138314aab889SJacques Vidrine if (&slc_replyp[6+2] > slc_reply_eom) 138414aab889SJacques Vidrine return; 138581cb6ddcSMark Murray if ((*slc_replyp++ = func) == IAC) 138681cb6ddcSMark Murray *slc_replyp++ = IAC; 138781cb6ddcSMark Murray if ((*slc_replyp++ = flags) == IAC) 138881cb6ddcSMark Murray *slc_replyp++ = IAC; 138981cb6ddcSMark Murray if ((*slc_replyp++ = (unsigned char)value) == IAC) 139081cb6ddcSMark Murray *slc_replyp++ = IAC; 139181cb6ddcSMark Murray } 139281cb6ddcSMark Murray 139381cb6ddcSMark Murray void 13948fa113e5SMark Murray slc_end_reply(void) 139581cb6ddcSMark Murray { 13968fa113e5SMark Murray int len; 139781cb6ddcSMark Murray 139814aab889SJacques Vidrine /* The end of negotiation command requires 2 bytes. */ 139914aab889SJacques Vidrine if (&slc_replyp[2] > slc_reply_eom) 140014aab889SJacques Vidrine return; 140181cb6ddcSMark Murray *slc_replyp++ = IAC; 140281cb6ddcSMark Murray *slc_replyp++ = SE; 140381cb6ddcSMark Murray len = slc_replyp - slc_reply; 140481cb6ddcSMark Murray if (len <= 6) 140581cb6ddcSMark Murray return; 140681cb6ddcSMark Murray if (NETROOM() > len) { 140781cb6ddcSMark Murray ring_supply_data(&netoring, slc_reply, slc_replyp - slc_reply); 140881cb6ddcSMark Murray printsub('>', &slc_reply[2], slc_replyp - slc_reply - 2); 140981cb6ddcSMark Murray } 141081cb6ddcSMark Murray /*@*/else printf("slc_end_reply: not enough room\n"); 141181cb6ddcSMark Murray } 141281cb6ddcSMark Murray 141381cb6ddcSMark Murray int 14148fa113e5SMark Murray slc_update(void) 141581cb6ddcSMark Murray { 14168fa113e5SMark Murray struct spc *spcp; 141781cb6ddcSMark Murray int need_update = 0; 141881cb6ddcSMark Murray 141981cb6ddcSMark Murray for (spcp = &spc_data[1]; spcp < &spc_data[NSLC+1]; spcp++) { 142081cb6ddcSMark Murray if (!(spcp->flags&SLC_ACK)) 142181cb6ddcSMark Murray continue; 142281cb6ddcSMark Murray spcp->flags &= ~SLC_ACK; 142381cb6ddcSMark Murray if (spcp->valp && (*spcp->valp != spcp->val)) { 142481cb6ddcSMark Murray *spcp->valp = spcp->val; 142581cb6ddcSMark Murray need_update = 1; 142681cb6ddcSMark Murray } 142781cb6ddcSMark Murray } 142881cb6ddcSMark Murray return(need_update); 142981cb6ddcSMark Murray } 143081cb6ddcSMark Murray 143181cb6ddcSMark Murray #ifdef OLD_ENVIRON 143281cb6ddcSMark Murray # ifdef ENV_HACK 143381cb6ddcSMark Murray /* 143481cb6ddcSMark Murray * Earlier version of telnet/telnetd from the BSD code had 143581cb6ddcSMark Murray * the definitions of VALUE and VAR reversed. To ensure 143681cb6ddcSMark Murray * maximum interoperability, we assume that the server is 143781cb6ddcSMark Murray * an older BSD server, until proven otherwise. The newer 143881cb6ddcSMark Murray * BSD servers should be able to handle either definition, 143981cb6ddcSMark Murray * so it is better to use the wrong values if we don't 144081cb6ddcSMark Murray * know what type of server it is. 144181cb6ddcSMark Murray */ 144281cb6ddcSMark Murray int env_auto = 1; 144381cb6ddcSMark Murray int old_env_var = OLD_ENV_VAR; 144481cb6ddcSMark Murray int old_env_value = OLD_ENV_VALUE; 144581cb6ddcSMark Murray # else 144681cb6ddcSMark Murray # define old_env_var OLD_ENV_VAR 144781cb6ddcSMark Murray # define old_env_value OLD_ENV_VALUE 144881cb6ddcSMark Murray # endif 144981cb6ddcSMark Murray #endif 145081cb6ddcSMark Murray 145181cb6ddcSMark Murray void 14528fa113e5SMark Murray env_opt(unsigned char *buf, int len) 145381cb6ddcSMark Murray { 14548fa113e5SMark Murray unsigned char *ep = 0, *epc = 0; 14558fa113e5SMark Murray int i; 145681cb6ddcSMark Murray 145781cb6ddcSMark Murray switch(buf[0]&0xff) { 145881cb6ddcSMark Murray case TELQUAL_SEND: 145981cb6ddcSMark Murray env_opt_start(); 146081cb6ddcSMark Murray if (len == 1) { 146181cb6ddcSMark Murray env_opt_add(NULL); 146281cb6ddcSMark Murray } else for (i = 1; i < len; i++) { 146381cb6ddcSMark Murray switch (buf[i]&0xff) { 146481cb6ddcSMark Murray #ifdef OLD_ENVIRON 146581cb6ddcSMark Murray case OLD_ENV_VAR: 146681cb6ddcSMark Murray # ifdef ENV_HACK 146781cb6ddcSMark Murray if (telopt_environ == TELOPT_OLD_ENVIRON 146881cb6ddcSMark Murray && env_auto) { 146981cb6ddcSMark Murray /* Server has the same definitions */ 147081cb6ddcSMark Murray old_env_var = OLD_ENV_VAR; 147181cb6ddcSMark Murray old_env_value = OLD_ENV_VALUE; 147281cb6ddcSMark Murray } 147381cb6ddcSMark Murray /* FALLTHROUGH */ 147481cb6ddcSMark Murray # endif 147581cb6ddcSMark Murray case OLD_ENV_VALUE: 147681cb6ddcSMark Murray /* 147781cb6ddcSMark Murray * Although OLD_ENV_VALUE is not legal, we will 147881cb6ddcSMark Murray * still recognize it, just in case it is an 147981cb6ddcSMark Murray * old server that has VAR & VALUE mixed up... 148081cb6ddcSMark Murray */ 148181cb6ddcSMark Murray /* FALLTHROUGH */ 148281cb6ddcSMark Murray #else 148381cb6ddcSMark Murray case NEW_ENV_VAR: 148481cb6ddcSMark Murray #endif 148581cb6ddcSMark Murray case ENV_USERVAR: 148681cb6ddcSMark Murray if (ep) { 148781cb6ddcSMark Murray *epc = 0; 148881cb6ddcSMark Murray env_opt_add(ep); 148981cb6ddcSMark Murray } 149081cb6ddcSMark Murray ep = epc = &buf[i+1]; 149181cb6ddcSMark Murray break; 149281cb6ddcSMark Murray case ENV_ESC: 149381cb6ddcSMark Murray i++; 149481cb6ddcSMark Murray /*FALLTHROUGH*/ 149581cb6ddcSMark Murray default: 149681cb6ddcSMark Murray if (epc) 149781cb6ddcSMark Murray *epc++ = buf[i]; 149881cb6ddcSMark Murray break; 149981cb6ddcSMark Murray } 150081cb6ddcSMark Murray } 150181cb6ddcSMark Murray if (ep) { 150281cb6ddcSMark Murray *epc = 0; 150381cb6ddcSMark Murray env_opt_add(ep); 150481cb6ddcSMark Murray } 150581cb6ddcSMark Murray env_opt_end(1); 150681cb6ddcSMark Murray break; 150781cb6ddcSMark Murray 150881cb6ddcSMark Murray case TELQUAL_IS: 150981cb6ddcSMark Murray case TELQUAL_INFO: 151081cb6ddcSMark Murray /* Ignore for now. We shouldn't get it anyway. */ 151181cb6ddcSMark Murray break; 151281cb6ddcSMark Murray 151381cb6ddcSMark Murray default: 151481cb6ddcSMark Murray break; 151581cb6ddcSMark Murray } 151681cb6ddcSMark Murray } 151781cb6ddcSMark Murray 151814aab889SJacques Vidrine #define OPT_REPLY_SIZE (2 * SUBBUFSIZE) 151914aab889SJacques Vidrine unsigned char *opt_reply = NULL; 152081cb6ddcSMark Murray unsigned char *opt_replyp; 152181cb6ddcSMark Murray unsigned char *opt_replyend; 152281cb6ddcSMark Murray 152381cb6ddcSMark Murray void 15248fa113e5SMark Murray env_opt_start(void) 152581cb6ddcSMark Murray { 152681cb6ddcSMark Murray if (opt_reply) 152781cb6ddcSMark Murray opt_reply = (unsigned char *)realloc(opt_reply, OPT_REPLY_SIZE); 152881cb6ddcSMark Murray else 152981cb6ddcSMark Murray opt_reply = (unsigned char *)malloc(OPT_REPLY_SIZE); 153081cb6ddcSMark Murray if (opt_reply == NULL) { 153181cb6ddcSMark Murray /*@*/ printf("env_opt_start: malloc()/realloc() failed!!!\n"); 153281cb6ddcSMark Murray opt_reply = opt_replyp = opt_replyend = NULL; 153381cb6ddcSMark Murray return; 153481cb6ddcSMark Murray } 153581cb6ddcSMark Murray opt_replyp = opt_reply; 153681cb6ddcSMark Murray opt_replyend = opt_reply + OPT_REPLY_SIZE; 153781cb6ddcSMark Murray *opt_replyp++ = IAC; 153881cb6ddcSMark Murray *opt_replyp++ = SB; 153981cb6ddcSMark Murray *opt_replyp++ = telopt_environ; 154081cb6ddcSMark Murray *opt_replyp++ = TELQUAL_IS; 154181cb6ddcSMark Murray } 154281cb6ddcSMark Murray 154381cb6ddcSMark Murray void 15448fa113e5SMark Murray env_opt_start_info(void) 154581cb6ddcSMark Murray { 154681cb6ddcSMark Murray env_opt_start(); 154781cb6ddcSMark Murray if (opt_replyp) 154881cb6ddcSMark Murray opt_replyp[-1] = TELQUAL_INFO; 154981cb6ddcSMark Murray } 155081cb6ddcSMark Murray 155181cb6ddcSMark Murray void 15528fa113e5SMark Murray env_opt_add(unsigned char *ep) 155381cb6ddcSMark Murray { 15548fa113e5SMark Murray unsigned char *vp, c; 155581cb6ddcSMark Murray 155681cb6ddcSMark Murray if (opt_reply == NULL) /*XXX*/ 155781cb6ddcSMark Murray return; /*XXX*/ 155881cb6ddcSMark Murray 155981cb6ddcSMark Murray if (ep == NULL || *ep == '\0') { 156081cb6ddcSMark Murray /* Send user defined variables first. */ 156181cb6ddcSMark Murray env_default(1, 0); 156204c426ccSMark Murray while ((ep = env_default(0, 0))) 156381cb6ddcSMark Murray env_opt_add(ep); 156481cb6ddcSMark Murray 156581cb6ddcSMark Murray /* Now add the list of well know variables. */ 156681cb6ddcSMark Murray env_default(1, 1); 156704c426ccSMark Murray while ((ep = env_default(0, 1))) 156881cb6ddcSMark Murray env_opt_add(ep); 156981cb6ddcSMark Murray return; 157081cb6ddcSMark Murray } 157181cb6ddcSMark Murray vp = env_getvalue(ep); 157214aab889SJacques Vidrine if (opt_replyp + (vp ? 2 * strlen((char *)vp) : 0) + 157314aab889SJacques Vidrine 2 * strlen((char *)ep) + 6 > opt_replyend) 157481cb6ddcSMark Murray { 15758fa113e5SMark Murray int len; 157681cb6ddcSMark Murray opt_replyend += OPT_REPLY_SIZE; 157781cb6ddcSMark Murray len = opt_replyend - opt_reply; 157881cb6ddcSMark Murray opt_reply = (unsigned char *)realloc(opt_reply, len); 157981cb6ddcSMark Murray if (opt_reply == NULL) { 158081cb6ddcSMark Murray /*@*/ printf("env_opt_add: realloc() failed!!!\n"); 158181cb6ddcSMark Murray opt_reply = opt_replyp = opt_replyend = NULL; 158281cb6ddcSMark Murray return; 158381cb6ddcSMark Murray } 158481cb6ddcSMark Murray opt_replyp = opt_reply + len - (opt_replyend - opt_replyp); 158581cb6ddcSMark Murray opt_replyend = opt_reply + len; 158681cb6ddcSMark Murray } 158781cb6ddcSMark Murray if (opt_welldefined(ep)) 158881cb6ddcSMark Murray #ifdef OLD_ENVIRON 158981cb6ddcSMark Murray if (telopt_environ == TELOPT_OLD_ENVIRON) 159081cb6ddcSMark Murray *opt_replyp++ = old_env_var; 159181cb6ddcSMark Murray else 159281cb6ddcSMark Murray #endif 159381cb6ddcSMark Murray *opt_replyp++ = NEW_ENV_VAR; 159481cb6ddcSMark Murray else 159581cb6ddcSMark Murray *opt_replyp++ = ENV_USERVAR; 159681cb6ddcSMark Murray for (;;) { 159704c426ccSMark Murray while ((c = *ep++)) { 159814aab889SJacques Vidrine if (opt_replyp + (2 + 2) > opt_replyend) 159914aab889SJacques Vidrine return; 160081cb6ddcSMark Murray switch(c&0xff) { 160181cb6ddcSMark Murray case IAC: 160281cb6ddcSMark Murray *opt_replyp++ = IAC; 160381cb6ddcSMark Murray break; 160481cb6ddcSMark Murray case NEW_ENV_VAR: 160581cb6ddcSMark Murray case NEW_ENV_VALUE: 160681cb6ddcSMark Murray case ENV_ESC: 160781cb6ddcSMark Murray case ENV_USERVAR: 160881cb6ddcSMark Murray *opt_replyp++ = ENV_ESC; 160981cb6ddcSMark Murray break; 161081cb6ddcSMark Murray } 161181cb6ddcSMark Murray *opt_replyp++ = c; 161281cb6ddcSMark Murray } 161304c426ccSMark Murray if ((ep = vp)) { 161414aab889SJacques Vidrine if (opt_replyp + (1 + 2 + 2) > opt_replyend) 161514aab889SJacques Vidrine return; 161681cb6ddcSMark Murray #ifdef OLD_ENVIRON 161781cb6ddcSMark Murray if (telopt_environ == TELOPT_OLD_ENVIRON) 161881cb6ddcSMark Murray *opt_replyp++ = old_env_value; 161981cb6ddcSMark Murray else 162081cb6ddcSMark Murray #endif 162181cb6ddcSMark Murray *opt_replyp++ = NEW_ENV_VALUE; 162281cb6ddcSMark Murray vp = NULL; 162381cb6ddcSMark Murray } else 162481cb6ddcSMark Murray break; 162581cb6ddcSMark Murray } 162681cb6ddcSMark Murray } 162781cb6ddcSMark Murray 162881cb6ddcSMark Murray int 16298fa113e5SMark Murray opt_welldefined(const char *ep) 163081cb6ddcSMark Murray { 163181cb6ddcSMark Murray if ((strcmp(ep, "USER") == 0) || 163281cb6ddcSMark Murray (strcmp(ep, "DISPLAY") == 0) || 163381cb6ddcSMark Murray (strcmp(ep, "PRINTER") == 0) || 163481cb6ddcSMark Murray (strcmp(ep, "SYSTEMTYPE") == 0) || 163581cb6ddcSMark Murray (strcmp(ep, "JOB") == 0) || 163681cb6ddcSMark Murray (strcmp(ep, "ACCT") == 0)) 163781cb6ddcSMark Murray return(1); 163881cb6ddcSMark Murray return(0); 163981cb6ddcSMark Murray } 16408fa113e5SMark Murray 164181cb6ddcSMark Murray void 16428fa113e5SMark Murray env_opt_end(int emptyok) 164381cb6ddcSMark Murray { 16448fa113e5SMark Murray int len; 164581cb6ddcSMark Murray 164614aab889SJacques Vidrine if (opt_replyp + 2 > opt_replyend) 164714aab889SJacques Vidrine return; 164814aab889SJacques Vidrine len = opt_replyp + 2 - opt_reply; 164981cb6ddcSMark Murray if (emptyok || len > 6) { 165081cb6ddcSMark Murray *opt_replyp++ = IAC; 165181cb6ddcSMark Murray *opt_replyp++ = SE; 165281cb6ddcSMark Murray if (NETROOM() > len) { 165381cb6ddcSMark Murray ring_supply_data(&netoring, opt_reply, len); 165481cb6ddcSMark Murray printsub('>', &opt_reply[2], len - 2); 165581cb6ddcSMark Murray } 165681cb6ddcSMark Murray /*@*/ else printf("slc_end_reply: not enough room\n"); 165781cb6ddcSMark Murray } 165881cb6ddcSMark Murray if (opt_reply) { 165981cb6ddcSMark Murray free(opt_reply); 166081cb6ddcSMark Murray opt_reply = opt_replyp = opt_replyend = NULL; 166181cb6ddcSMark Murray } 166281cb6ddcSMark Murray } 166381cb6ddcSMark Murray 1664ad11def5SEnji Cooper 166581cb6ddcSMark Murray 166681cb6ddcSMark Murray int 16678fa113e5SMark Murray telrcv(void) 166881cb6ddcSMark Murray { 16698fa113e5SMark Murray int c; 16708fa113e5SMark Murray int scc; 16718fa113e5SMark Murray unsigned char *sbp; 167281cb6ddcSMark Murray int count; 167381cb6ddcSMark Murray int returnValue = 0; 167481cb6ddcSMark Murray 167581cb6ddcSMark Murray scc = 0; 167681cb6ddcSMark Murray count = 0; 167781cb6ddcSMark Murray while (TTYROOM() > 2) { 167881cb6ddcSMark Murray if (scc == 0) { 167981cb6ddcSMark Murray if (count) { 168081cb6ddcSMark Murray ring_consumed(&netiring, count); 168181cb6ddcSMark Murray returnValue = 1; 168281cb6ddcSMark Murray count = 0; 168381cb6ddcSMark Murray } 168481cb6ddcSMark Murray sbp = netiring.consume; 168581cb6ddcSMark Murray scc = ring_full_consecutive(&netiring); 168681cb6ddcSMark Murray if (scc == 0) { 168781cb6ddcSMark Murray /* No more data coming in */ 168881cb6ddcSMark Murray break; 168981cb6ddcSMark Murray } 169081cb6ddcSMark Murray } 169181cb6ddcSMark Murray 169281cb6ddcSMark Murray c = *sbp++ & 0xff, scc--; count++; 169381cb6ddcSMark Murray #ifdef ENCRYPTION 169481cb6ddcSMark Murray if (decrypt_input) 169581cb6ddcSMark Murray c = (*decrypt_input)(c); 169681cb6ddcSMark Murray #endif /* ENCRYPTION */ 169781cb6ddcSMark Murray 169881cb6ddcSMark Murray switch (telrcv_state) { 169981cb6ddcSMark Murray 170081cb6ddcSMark Murray case TS_CR: 170181cb6ddcSMark Murray telrcv_state = TS_DATA; 170281cb6ddcSMark Murray if (c == '\0') { 170381cb6ddcSMark Murray break; /* Ignore \0 after CR */ 170481cb6ddcSMark Murray } 170581cb6ddcSMark Murray else if ((c == '\n') && my_want_state_is_dont(TELOPT_ECHO) && !crmod) { 170681cb6ddcSMark Murray TTYADD(c); 170781cb6ddcSMark Murray break; 170881cb6ddcSMark Murray } 170986953b02SMark Murray /* FALLTHROUGH */ 171081cb6ddcSMark Murray 171181cb6ddcSMark Murray case TS_DATA: 17123a44a4c3SAnton Berezin if (c == IAC && telnetport >= 0) { 171381cb6ddcSMark Murray telrcv_state = TS_IAC; 171481cb6ddcSMark Murray break; 171581cb6ddcSMark Murray } 171681cb6ddcSMark Murray /* 171781cb6ddcSMark Murray * The 'crmod' hack (see following) is needed 171881cb6ddcSMark Murray * since we can't * set CRMOD on output only. 171981cb6ddcSMark Murray * Machines like MULTICS like to send \r without 172081cb6ddcSMark Murray * \n; since we must turn off CRMOD to get proper 172181cb6ddcSMark Murray * input, the mapping is done here (sigh). 172281cb6ddcSMark Murray */ 172381cb6ddcSMark Murray if ((c == '\r') && my_want_state_is_dont(TELOPT_BINARY)) { 172481cb6ddcSMark Murray if (scc > 0) { 172581cb6ddcSMark Murray c = *sbp&0xff; 172681cb6ddcSMark Murray #ifdef ENCRYPTION 172781cb6ddcSMark Murray if (decrypt_input) 172881cb6ddcSMark Murray c = (*decrypt_input)(c); 172981cb6ddcSMark Murray #endif /* ENCRYPTION */ 173081cb6ddcSMark Murray if (c == 0) { 173181cb6ddcSMark Murray sbp++, scc--; count++; 173281cb6ddcSMark Murray /* a "true" CR */ 173381cb6ddcSMark Murray TTYADD('\r'); 173481cb6ddcSMark Murray } else if (my_want_state_is_dont(TELOPT_ECHO) && 173581cb6ddcSMark Murray (c == '\n')) { 173681cb6ddcSMark Murray sbp++, scc--; count++; 173781cb6ddcSMark Murray TTYADD('\n'); 173881cb6ddcSMark Murray } else { 173981cb6ddcSMark Murray #ifdef ENCRYPTION 174081cb6ddcSMark Murray if (decrypt_input) 174181cb6ddcSMark Murray (*decrypt_input)(-1); 174281cb6ddcSMark Murray #endif /* ENCRYPTION */ 174381cb6ddcSMark Murray 174481cb6ddcSMark Murray TTYADD('\r'); 174581cb6ddcSMark Murray if (crmod) { 174681cb6ddcSMark Murray TTYADD('\n'); 174781cb6ddcSMark Murray } 174881cb6ddcSMark Murray } 174981cb6ddcSMark Murray } else { 175081cb6ddcSMark Murray telrcv_state = TS_CR; 175181cb6ddcSMark Murray TTYADD('\r'); 175281cb6ddcSMark Murray if (crmod) { 175381cb6ddcSMark Murray TTYADD('\n'); 175481cb6ddcSMark Murray } 175581cb6ddcSMark Murray } 175681cb6ddcSMark Murray } else { 175781cb6ddcSMark Murray TTYADD(c); 175881cb6ddcSMark Murray } 175981cb6ddcSMark Murray continue; 176081cb6ddcSMark Murray 176181cb6ddcSMark Murray case TS_IAC: 176281cb6ddcSMark Murray process_iac: 176381cb6ddcSMark Murray switch (c) { 176481cb6ddcSMark Murray 176581cb6ddcSMark Murray case WILL: 176681cb6ddcSMark Murray telrcv_state = TS_WILL; 176781cb6ddcSMark Murray continue; 176881cb6ddcSMark Murray 176981cb6ddcSMark Murray case WONT: 177081cb6ddcSMark Murray telrcv_state = TS_WONT; 177181cb6ddcSMark Murray continue; 177281cb6ddcSMark Murray 177381cb6ddcSMark Murray case DO: 177481cb6ddcSMark Murray telrcv_state = TS_DO; 177581cb6ddcSMark Murray continue; 177681cb6ddcSMark Murray 177781cb6ddcSMark Murray case DONT: 177881cb6ddcSMark Murray telrcv_state = TS_DONT; 177981cb6ddcSMark Murray continue; 178081cb6ddcSMark Murray 178181cb6ddcSMark Murray case DM: 178281cb6ddcSMark Murray /* 178381cb6ddcSMark Murray * We may have missed an urgent notification, 178481cb6ddcSMark Murray * so make sure we flush whatever is in the 178581cb6ddcSMark Murray * buffer currently. 178681cb6ddcSMark Murray */ 178781cb6ddcSMark Murray printoption("RCVD", IAC, DM); 178881cb6ddcSMark Murray SYNCHing = 1; 178981cb6ddcSMark Murray (void) ttyflush(1); 179081cb6ddcSMark Murray SYNCHing = stilloob(); 179181cb6ddcSMark Murray settimer(gotDM); 179281cb6ddcSMark Murray break; 179381cb6ddcSMark Murray 179481cb6ddcSMark Murray case SB: 179581cb6ddcSMark Murray SB_CLEAR(); 179681cb6ddcSMark Murray telrcv_state = TS_SB; 179781cb6ddcSMark Murray continue; 179881cb6ddcSMark Murray 179981cb6ddcSMark Murray case IAC: 180081cb6ddcSMark Murray TTYADD(IAC); 180181cb6ddcSMark Murray break; 180281cb6ddcSMark Murray 180381cb6ddcSMark Murray case NOP: 180481cb6ddcSMark Murray case GA: 180581cb6ddcSMark Murray default: 180681cb6ddcSMark Murray printoption("RCVD", IAC, c); 180781cb6ddcSMark Murray break; 180881cb6ddcSMark Murray } 180981cb6ddcSMark Murray telrcv_state = TS_DATA; 181081cb6ddcSMark Murray continue; 181181cb6ddcSMark Murray 181281cb6ddcSMark Murray case TS_WILL: 181381cb6ddcSMark Murray printoption("RCVD", WILL, c); 181481cb6ddcSMark Murray willoption(c); 181581cb6ddcSMark Murray telrcv_state = TS_DATA; 181681cb6ddcSMark Murray continue; 181781cb6ddcSMark Murray 181881cb6ddcSMark Murray case TS_WONT: 181981cb6ddcSMark Murray printoption("RCVD", WONT, c); 182081cb6ddcSMark Murray wontoption(c); 182181cb6ddcSMark Murray telrcv_state = TS_DATA; 182281cb6ddcSMark Murray continue; 182381cb6ddcSMark Murray 182481cb6ddcSMark Murray case TS_DO: 182581cb6ddcSMark Murray printoption("RCVD", DO, c); 182681cb6ddcSMark Murray dooption(c); 182781cb6ddcSMark Murray if (c == TELOPT_NAWS) { 182881cb6ddcSMark Murray sendnaws(); 182981cb6ddcSMark Murray } else if (c == TELOPT_LFLOW) { 183081cb6ddcSMark Murray localflow = 1; 183181cb6ddcSMark Murray setcommandmode(); 183281cb6ddcSMark Murray setconnmode(0); 183381cb6ddcSMark Murray } 183481cb6ddcSMark Murray telrcv_state = TS_DATA; 183581cb6ddcSMark Murray continue; 183681cb6ddcSMark Murray 183781cb6ddcSMark Murray case TS_DONT: 183881cb6ddcSMark Murray printoption("RCVD", DONT, c); 183981cb6ddcSMark Murray dontoption(c); 184081cb6ddcSMark Murray flushline = 1; 184181cb6ddcSMark Murray setconnmode(0); /* set new tty mode (maybe) */ 184281cb6ddcSMark Murray telrcv_state = TS_DATA; 184381cb6ddcSMark Murray continue; 184481cb6ddcSMark Murray 184581cb6ddcSMark Murray case TS_SB: 184681cb6ddcSMark Murray if (c == IAC) { 184781cb6ddcSMark Murray telrcv_state = TS_SE; 184881cb6ddcSMark Murray } else { 184981cb6ddcSMark Murray SB_ACCUM(c); 185081cb6ddcSMark Murray } 185181cb6ddcSMark Murray continue; 185281cb6ddcSMark Murray 185381cb6ddcSMark Murray case TS_SE: 185481cb6ddcSMark Murray if (c != SE) { 185581cb6ddcSMark Murray if (c != IAC) { 185681cb6ddcSMark Murray /* 185781cb6ddcSMark Murray * This is an error. We only expect to get 185881cb6ddcSMark Murray * "IAC IAC" or "IAC SE". Several things may 185981cb6ddcSMark Murray * have happend. An IAC was not doubled, the 186081cb6ddcSMark Murray * IAC SE was left off, or another option got 186181cb6ddcSMark Murray * inserted into the suboption are all possibilities. 186281cb6ddcSMark Murray * If we assume that the IAC was not doubled, 186381cb6ddcSMark Murray * and really the IAC SE was left off, we could 186481cb6ddcSMark Murray * get into an infinate loop here. So, instead, 186581cb6ddcSMark Murray * we terminate the suboption, and process the 186681cb6ddcSMark Murray * partial suboption if we can. 186781cb6ddcSMark Murray */ 186881cb6ddcSMark Murray SB_ACCUM(IAC); 186981cb6ddcSMark Murray SB_ACCUM(c); 187081cb6ddcSMark Murray subpointer -= 2; 187181cb6ddcSMark Murray SB_TERM(); 187281cb6ddcSMark Murray 187381cb6ddcSMark Murray printoption("In SUBOPTION processing, RCVD", IAC, c); 187481cb6ddcSMark Murray suboption(); /* handle sub-option */ 187581cb6ddcSMark Murray telrcv_state = TS_IAC; 187681cb6ddcSMark Murray goto process_iac; 187781cb6ddcSMark Murray } 187881cb6ddcSMark Murray SB_ACCUM(c); 187981cb6ddcSMark Murray telrcv_state = TS_SB; 188081cb6ddcSMark Murray } else { 188181cb6ddcSMark Murray SB_ACCUM(IAC); 188281cb6ddcSMark Murray SB_ACCUM(SE); 188381cb6ddcSMark Murray subpointer -= 2; 188481cb6ddcSMark Murray SB_TERM(); 188581cb6ddcSMark Murray suboption(); /* handle sub-option */ 188681cb6ddcSMark Murray telrcv_state = TS_DATA; 188781cb6ddcSMark Murray } 188881cb6ddcSMark Murray } 188981cb6ddcSMark Murray } 189081cb6ddcSMark Murray if (count) 189181cb6ddcSMark Murray ring_consumed(&netiring, count); 189281cb6ddcSMark Murray return returnValue||count; 189381cb6ddcSMark Murray } 189481cb6ddcSMark Murray 189581cb6ddcSMark Murray static int bol = 1, local = 0; 189681cb6ddcSMark Murray 189781cb6ddcSMark Murray int 18988fa113e5SMark Murray rlogin_susp(void) 189981cb6ddcSMark Murray { 190081cb6ddcSMark Murray if (local) { 190181cb6ddcSMark Murray local = 0; 190281cb6ddcSMark Murray bol = 1; 190381cb6ddcSMark Murray command(0, "z\n", 2); 190481cb6ddcSMark Murray return(1); 190581cb6ddcSMark Murray } 190681cb6ddcSMark Murray return(0); 190781cb6ddcSMark Murray } 190881cb6ddcSMark Murray 190981cb6ddcSMark Murray static int 19108fa113e5SMark Murray telsnd(void) 191181cb6ddcSMark Murray { 191281cb6ddcSMark Murray int tcc; 191381cb6ddcSMark Murray int count; 191481cb6ddcSMark Murray int returnValue = 0; 191581cb6ddcSMark Murray unsigned char *tbp; 191681cb6ddcSMark Murray 191781cb6ddcSMark Murray tcc = 0; 191881cb6ddcSMark Murray count = 0; 191981cb6ddcSMark Murray while (NETROOM() > 2) { 19208fa113e5SMark Murray int sc; 19218fa113e5SMark Murray int c; 192281cb6ddcSMark Murray 192381cb6ddcSMark Murray if (tcc == 0) { 192481cb6ddcSMark Murray if (count) { 192581cb6ddcSMark Murray ring_consumed(&ttyiring, count); 192681cb6ddcSMark Murray returnValue = 1; 192781cb6ddcSMark Murray count = 0; 192881cb6ddcSMark Murray } 192981cb6ddcSMark Murray tbp = ttyiring.consume; 193081cb6ddcSMark Murray tcc = ring_full_consecutive(&ttyiring); 193181cb6ddcSMark Murray if (tcc == 0) { 193281cb6ddcSMark Murray break; 193381cb6ddcSMark Murray } 193481cb6ddcSMark Murray } 193581cb6ddcSMark Murray c = *tbp++ & 0xff, sc = strip(c), tcc--; count++; 193681cb6ddcSMark Murray if (rlogin != _POSIX_VDISABLE) { 193781cb6ddcSMark Murray if (bol) { 193881cb6ddcSMark Murray bol = 0; 193981cb6ddcSMark Murray if (sc == rlogin) { 194081cb6ddcSMark Murray local = 1; 194181cb6ddcSMark Murray continue; 194281cb6ddcSMark Murray } 194381cb6ddcSMark Murray } else if (local) { 194481cb6ddcSMark Murray local = 0; 194581cb6ddcSMark Murray if (sc == '.' || c == termEofChar) { 194681cb6ddcSMark Murray bol = 1; 194781cb6ddcSMark Murray command(0, "close\n", 6); 194881cb6ddcSMark Murray continue; 194981cb6ddcSMark Murray } 195081cb6ddcSMark Murray if (sc == termSuspChar) { 195181cb6ddcSMark Murray bol = 1; 195281cb6ddcSMark Murray command(0, "z\n", 2); 195381cb6ddcSMark Murray continue; 195481cb6ddcSMark Murray } 195581cb6ddcSMark Murray if (sc == escape) { 19568fa113e5SMark Murray command(0, tbp, tcc); 195781cb6ddcSMark Murray bol = 1; 195881cb6ddcSMark Murray count += tcc; 195981cb6ddcSMark Murray tcc = 0; 196081cb6ddcSMark Murray flushline = 1; 196181cb6ddcSMark Murray break; 196281cb6ddcSMark Murray } 196381cb6ddcSMark Murray if (sc != rlogin) { 196481cb6ddcSMark Murray ++tcc; 196581cb6ddcSMark Murray --tbp; 196681cb6ddcSMark Murray --count; 196781cb6ddcSMark Murray c = sc = rlogin; 196881cb6ddcSMark Murray } 196981cb6ddcSMark Murray } 197081cb6ddcSMark Murray if ((sc == '\n') || (sc == '\r')) 197181cb6ddcSMark Murray bol = 1; 197242cf8219SRuslan Ermilov } else if (escape != _POSIX_VDISABLE && sc == escape) { 197381cb6ddcSMark Murray /* 197481cb6ddcSMark Murray * Double escape is a pass through of a single escape character. 197581cb6ddcSMark Murray */ 197681cb6ddcSMark Murray if (tcc && strip(*tbp) == escape) { 197781cb6ddcSMark Murray tbp++; 197881cb6ddcSMark Murray tcc--; 197981cb6ddcSMark Murray count++; 198081cb6ddcSMark Murray bol = 0; 198181cb6ddcSMark Murray } else { 198281cb6ddcSMark Murray command(0, (char *)tbp, tcc); 198381cb6ddcSMark Murray bol = 1; 198481cb6ddcSMark Murray count += tcc; 198581cb6ddcSMark Murray tcc = 0; 198681cb6ddcSMark Murray flushline = 1; 198781cb6ddcSMark Murray break; 198881cb6ddcSMark Murray } 198981cb6ddcSMark Murray } else 199081cb6ddcSMark Murray bol = 0; 199181cb6ddcSMark Murray #ifdef KLUDGELINEMODE 199281cb6ddcSMark Murray if (kludgelinemode && (globalmode&MODE_EDIT) && (sc == echoc)) { 199381cb6ddcSMark Murray if (tcc > 0 && strip(*tbp) == echoc) { 199481cb6ddcSMark Murray tcc--; tbp++; count++; 199581cb6ddcSMark Murray } else { 199681cb6ddcSMark Murray dontlecho = !dontlecho; 199781cb6ddcSMark Murray settimer(echotoggle); 199881cb6ddcSMark Murray setconnmode(0); 199981cb6ddcSMark Murray flushline = 1; 200081cb6ddcSMark Murray break; 200181cb6ddcSMark Murray } 200281cb6ddcSMark Murray } 200381cb6ddcSMark Murray #endif 200481cb6ddcSMark Murray if (MODE_LOCAL_CHARS(globalmode)) { 200581cb6ddcSMark Murray if (TerminalSpecialChars(sc) == 0) { 200681cb6ddcSMark Murray bol = 1; 200781cb6ddcSMark Murray break; 200881cb6ddcSMark Murray } 200981cb6ddcSMark Murray } 201081cb6ddcSMark Murray if (my_want_state_is_wont(TELOPT_BINARY)) { 201181cb6ddcSMark Murray switch (c) { 201281cb6ddcSMark Murray case '\n': 201381cb6ddcSMark Murray /* 201481cb6ddcSMark Murray * If we are in CRMOD mode (\r ==> \n) 201581cb6ddcSMark Murray * on our local machine, then probably 201681cb6ddcSMark Murray * a newline (unix) is CRLF (TELNET). 201781cb6ddcSMark Murray */ 201881cb6ddcSMark Murray if (MODE_LOCAL_CHARS(globalmode)) { 201981cb6ddcSMark Murray NETADD('\r'); 202081cb6ddcSMark Murray } 202181cb6ddcSMark Murray NETADD('\n'); 202281cb6ddcSMark Murray bol = flushline = 1; 202381cb6ddcSMark Murray break; 202481cb6ddcSMark Murray case '\r': 202581cb6ddcSMark Murray if (!crlf) { 202681cb6ddcSMark Murray NET2ADD('\r', '\0'); 202781cb6ddcSMark Murray } else { 202881cb6ddcSMark Murray NET2ADD('\r', '\n'); 202981cb6ddcSMark Murray } 203081cb6ddcSMark Murray bol = flushline = 1; 203181cb6ddcSMark Murray break; 203281cb6ddcSMark Murray case IAC: 203381cb6ddcSMark Murray NET2ADD(IAC, IAC); 203481cb6ddcSMark Murray break; 203581cb6ddcSMark Murray default: 203681cb6ddcSMark Murray NETADD(c); 203781cb6ddcSMark Murray break; 203881cb6ddcSMark Murray } 203981cb6ddcSMark Murray } else if (c == IAC) { 204081cb6ddcSMark Murray NET2ADD(IAC, IAC); 204181cb6ddcSMark Murray } else { 204281cb6ddcSMark Murray NETADD(c); 204381cb6ddcSMark Murray } 204481cb6ddcSMark Murray } 204581cb6ddcSMark Murray if (count) 204681cb6ddcSMark Murray ring_consumed(&ttyiring, count); 204781cb6ddcSMark Murray return returnValue||count; /* Non-zero if we did anything */ 204881cb6ddcSMark Murray } 2049ad11def5SEnji Cooper 205081cb6ddcSMark Murray /* 205181cb6ddcSMark Murray * Scheduler() 205281cb6ddcSMark Murray * 205381cb6ddcSMark Murray * Try to do something. 205481cb6ddcSMark Murray * 205581cb6ddcSMark Murray * If we do something useful, return 1; else return 0. 205681cb6ddcSMark Murray * 205781cb6ddcSMark Murray */ 205881cb6ddcSMark Murray 20598fa113e5SMark Murray static int 20608fa113e5SMark Murray Scheduler(int block) 206181cb6ddcSMark Murray { 206281cb6ddcSMark Murray /* One wants to be a bit careful about setting returnValue 206381cb6ddcSMark Murray * to one, since a one implies we did some useful work, 206481cb6ddcSMark Murray * and therefore probably won't be called to block next 206581cb6ddcSMark Murray */ 206681cb6ddcSMark Murray int returnValue; 206781cb6ddcSMark Murray int netin, netout, netex, ttyin, ttyout; 206881cb6ddcSMark Murray 206981cb6ddcSMark Murray /* Decide which rings should be processed */ 207081cb6ddcSMark Murray 207181cb6ddcSMark Murray netout = ring_full_count(&netoring) && 207281cb6ddcSMark Murray (flushline || 207381cb6ddcSMark Murray (my_want_state_is_wont(TELOPT_LINEMODE) 207481cb6ddcSMark Murray #ifdef KLUDGELINEMODE 207581cb6ddcSMark Murray && (!kludgelinemode || my_want_state_is_do(TELOPT_SGA)) 207681cb6ddcSMark Murray #endif 207781cb6ddcSMark Murray ) || 207881cb6ddcSMark Murray my_want_state_is_will(TELOPT_BINARY)); 207981cb6ddcSMark Murray ttyout = ring_full_count(&ttyoring); 208081cb6ddcSMark Murray 208104c426ccSMark Murray ttyin = ring_empty_count(&ttyiring) && (clienteof == 0); 208281cb6ddcSMark Murray 208381cb6ddcSMark Murray netin = !ISend && ring_empty_count(&netiring); 208481cb6ddcSMark Murray 208581cb6ddcSMark Murray netex = !SYNCHing; 208681cb6ddcSMark Murray 208781cb6ddcSMark Murray /* Call to system code to process rings */ 208881cb6ddcSMark Murray 208981cb6ddcSMark Murray returnValue = process_rings(netin, netout, netex, ttyin, ttyout, !block); 209081cb6ddcSMark Murray 209181cb6ddcSMark Murray /* Now, look at the input rings, looking for work to do. */ 209281cb6ddcSMark Murray 209381cb6ddcSMark Murray if (ring_full_count(&ttyiring)) { 209481cb6ddcSMark Murray returnValue |= telsnd(); 209581cb6ddcSMark Murray } 209681cb6ddcSMark Murray 209781cb6ddcSMark Murray if (ring_full_count(&netiring)) { 209881cb6ddcSMark Murray returnValue |= telrcv(); 209981cb6ddcSMark Murray } 210081cb6ddcSMark Murray return returnValue; 210181cb6ddcSMark Murray } 210281cb6ddcSMark Murray 21038fa113e5SMark Murray #ifdef AUTHENTICATION 21048fa113e5SMark Murray #define __unusedhere 21058fa113e5SMark Murray #else 21068fa113e5SMark Murray #define __unusedhere __unused 21078fa113e5SMark Murray #endif 210881cb6ddcSMark Murray /* 210981cb6ddcSMark Murray * Select from tty and network... 211081cb6ddcSMark Murray */ 211181cb6ddcSMark Murray void 21128fa113e5SMark Murray telnet(char *user __unusedhere) 211381cb6ddcSMark Murray { 211481cb6ddcSMark Murray sys_telnet_init(); 211581cb6ddcSMark Murray 21168fa113e5SMark Murray #ifdef AUTHENTICATION 21178fa113e5SMark Murray #ifdef ENCRYPTION 211881cb6ddcSMark Murray { 211981cb6ddcSMark Murray static char local_host[256] = { 0 }; 212081cb6ddcSMark Murray 212181cb6ddcSMark Murray if (!local_host[0]) { 212281cb6ddcSMark Murray gethostname(local_host, sizeof(local_host)); 212381cb6ddcSMark Murray local_host[sizeof(local_host)-1] = 0; 212481cb6ddcSMark Murray } 212581cb6ddcSMark Murray auth_encrypt_init(local_host, hostname, "TELNET", 0); 212681cb6ddcSMark Murray auth_encrypt_user(user); 212781cb6ddcSMark Murray } 21288fa113e5SMark Murray #endif 21298fa113e5SMark Murray #endif 21303a44a4c3SAnton Berezin if (telnetport > 0) { 21318fa113e5SMark Murray #ifdef AUTHENTICATION 213281cb6ddcSMark Murray if (autologin) 213381cb6ddcSMark Murray send_will(TELOPT_AUTHENTICATION, 1); 213481cb6ddcSMark Murray #endif 213581cb6ddcSMark Murray #ifdef ENCRYPTION 213681cb6ddcSMark Murray send_do(TELOPT_ENCRYPT, 1); 213781cb6ddcSMark Murray send_will(TELOPT_ENCRYPT, 1); 213881cb6ddcSMark Murray #endif /* ENCRYPTION */ 213981cb6ddcSMark Murray send_do(TELOPT_SGA, 1); 214081cb6ddcSMark Murray send_will(TELOPT_TTYPE, 1); 214181cb6ddcSMark Murray send_will(TELOPT_NAWS, 1); 214281cb6ddcSMark Murray send_will(TELOPT_TSPEED, 1); 214381cb6ddcSMark Murray send_will(TELOPT_LFLOW, 1); 214481cb6ddcSMark Murray send_will(TELOPT_LINEMODE, 1); 214581cb6ddcSMark Murray send_will(TELOPT_NEW_ENVIRON, 1); 214681cb6ddcSMark Murray send_do(TELOPT_STATUS, 1); 21478fa113e5SMark Murray if (env_getvalue("DISPLAY")) 214881cb6ddcSMark Murray send_will(TELOPT_XDISPLOC, 1); 214981cb6ddcSMark Murray if (eight) 215081cb6ddcSMark Murray tel_enter_binary(eight); 215181cb6ddcSMark Murray } 215281cb6ddcSMark Murray 215381cb6ddcSMark Murray for (;;) { 215481cb6ddcSMark Murray int schedValue; 215581cb6ddcSMark Murray 215681cb6ddcSMark Murray while ((schedValue = Scheduler(0)) != 0) { 215781cb6ddcSMark Murray if (schedValue == -1) { 215881cb6ddcSMark Murray setcommandmode(); 215981cb6ddcSMark Murray return; 216081cb6ddcSMark Murray } 216181cb6ddcSMark Murray } 216281cb6ddcSMark Murray 216381cb6ddcSMark Murray if (Scheduler(1) == -1) { 216481cb6ddcSMark Murray setcommandmode(); 216581cb6ddcSMark Murray return; 216681cb6ddcSMark Murray } 216781cb6ddcSMark Murray } 216881cb6ddcSMark Murray } 216981cb6ddcSMark Murray 217081cb6ddcSMark Murray #if 0 /* XXX - this not being in is a bug */ 217181cb6ddcSMark Murray /* 217281cb6ddcSMark Murray * nextitem() 217381cb6ddcSMark Murray * 217481cb6ddcSMark Murray * Return the address of the next "item" in the TELNET data 217581cb6ddcSMark Murray * stream. This will be the address of the next character if 217681cb6ddcSMark Murray * the current address is a user data character, or it will 217781cb6ddcSMark Murray * be the address of the character following the TELNET command 217881cb6ddcSMark Murray * if the current address is a TELNET IAC ("I Am a Command") 217981cb6ddcSMark Murray * character. 218081cb6ddcSMark Murray */ 218181cb6ddcSMark Murray 218281cb6ddcSMark Murray static char * 21838fa113e5SMark Murray nextitem(char *current) 218481cb6ddcSMark Murray { 218581cb6ddcSMark Murray if ((*current&0xff) != IAC) { 218681cb6ddcSMark Murray return current+1; 218781cb6ddcSMark Murray } 218881cb6ddcSMark Murray switch (*(current+1)&0xff) { 218981cb6ddcSMark Murray case DO: 219081cb6ddcSMark Murray case DONT: 219181cb6ddcSMark Murray case WILL: 219281cb6ddcSMark Murray case WONT: 219381cb6ddcSMark Murray return current+3; 219481cb6ddcSMark Murray case SB: /* loop forever looking for the SE */ 219581cb6ddcSMark Murray { 21968fa113e5SMark Murray char *look = current+2; 219781cb6ddcSMark Murray 219881cb6ddcSMark Murray for (;;) { 219981cb6ddcSMark Murray if ((*look++&0xff) == IAC) { 220081cb6ddcSMark Murray if ((*look++&0xff) == SE) { 220181cb6ddcSMark Murray return look; 220281cb6ddcSMark Murray } 220381cb6ddcSMark Murray } 220481cb6ddcSMark Murray } 220581cb6ddcSMark Murray } 220681cb6ddcSMark Murray default: 220781cb6ddcSMark Murray return current+2; 220881cb6ddcSMark Murray } 220981cb6ddcSMark Murray } 221081cb6ddcSMark Murray #endif /* 0 */ 221181cb6ddcSMark Murray 221281cb6ddcSMark Murray /* 221381cb6ddcSMark Murray * netclear() 221481cb6ddcSMark Murray * 221581cb6ddcSMark Murray * We are about to do a TELNET SYNCH operation. Clear 221681cb6ddcSMark Murray * the path to the network. 221781cb6ddcSMark Murray * 221881cb6ddcSMark Murray * Things are a bit tricky since we may have sent the first 221981cb6ddcSMark Murray * byte or so of a previous TELNET command into the network. 222081cb6ddcSMark Murray * So, we have to scan the network buffer from the beginning 222181cb6ddcSMark Murray * until we are up to where we want to be. 222281cb6ddcSMark Murray * 222381cb6ddcSMark Murray * A side effect of what we do, just to keep things 222481cb6ddcSMark Murray * simple, is to clear the urgent data pointer. The principal 222581cb6ddcSMark Murray * caller should be setting the urgent data pointer AFTER calling 222681cb6ddcSMark Murray * us in any case. 222781cb6ddcSMark Murray */ 222881cb6ddcSMark Murray 222981cb6ddcSMark Murray static void 22308fa113e5SMark Murray netclear(void) 223181cb6ddcSMark Murray { 22328fa113e5SMark Murray /* Deleted */ 223381cb6ddcSMark Murray } 223481cb6ddcSMark Murray 223581cb6ddcSMark Murray /* 223681cb6ddcSMark Murray * These routines add various telnet commands to the data stream. 223781cb6ddcSMark Murray */ 223881cb6ddcSMark Murray 223981cb6ddcSMark Murray static void 22408fa113e5SMark Murray doflush(void) 224181cb6ddcSMark Murray { 224281cb6ddcSMark Murray NET2ADD(IAC, DO); 224381cb6ddcSMark Murray NETADD(TELOPT_TM); 224481cb6ddcSMark Murray flushline = 1; 224581cb6ddcSMark Murray flushout = 1; 224681cb6ddcSMark Murray (void) ttyflush(1); /* Flush/drop output */ 224781cb6ddcSMark Murray /* do printoption AFTER flush, otherwise the output gets tossed... */ 224881cb6ddcSMark Murray printoption("SENT", DO, TELOPT_TM); 224981cb6ddcSMark Murray } 225081cb6ddcSMark Murray 225181cb6ddcSMark Murray void 22528fa113e5SMark Murray xmitAO(void) 225381cb6ddcSMark Murray { 225481cb6ddcSMark Murray NET2ADD(IAC, AO); 225581cb6ddcSMark Murray printoption("SENT", IAC, AO); 225681cb6ddcSMark Murray if (autoflush) { 225781cb6ddcSMark Murray doflush(); 225881cb6ddcSMark Murray } 225981cb6ddcSMark Murray } 226081cb6ddcSMark Murray 226181cb6ddcSMark Murray void 22628fa113e5SMark Murray xmitEL(void) 226381cb6ddcSMark Murray { 226481cb6ddcSMark Murray NET2ADD(IAC, EL); 226581cb6ddcSMark Murray printoption("SENT", IAC, EL); 226681cb6ddcSMark Murray } 226781cb6ddcSMark Murray 226881cb6ddcSMark Murray void 22698fa113e5SMark Murray xmitEC(void) 227081cb6ddcSMark Murray { 227181cb6ddcSMark Murray NET2ADD(IAC, EC); 227281cb6ddcSMark Murray printoption("SENT", IAC, EC); 227381cb6ddcSMark Murray } 227481cb6ddcSMark Murray 227581cb6ddcSMark Murray int 22768fa113e5SMark Murray dosynch(char *ch __unused) 227781cb6ddcSMark Murray { 227881cb6ddcSMark Murray netclear(); /* clear the path to the network */ 227981cb6ddcSMark Murray NETADD(IAC); 228081cb6ddcSMark Murray setneturg(); 228181cb6ddcSMark Murray NETADD(DM); 228281cb6ddcSMark Murray printoption("SENT", IAC, DM); 228381cb6ddcSMark Murray return 1; 228481cb6ddcSMark Murray } 228581cb6ddcSMark Murray 228681cb6ddcSMark Murray int want_status_response = 0; 228781cb6ddcSMark Murray 228881cb6ddcSMark Murray int 22898fa113e5SMark Murray get_status(char *ch __unused) 229081cb6ddcSMark Murray { 229181cb6ddcSMark Murray unsigned char tmp[16]; 22928fa113e5SMark Murray unsigned char *cp; 229381cb6ddcSMark Murray 229481cb6ddcSMark Murray if (my_want_state_is_dont(TELOPT_STATUS)) { 229581cb6ddcSMark Murray printf("Remote side does not support STATUS option\n"); 229681cb6ddcSMark Murray return 0; 229781cb6ddcSMark Murray } 229881cb6ddcSMark Murray cp = tmp; 229981cb6ddcSMark Murray 230081cb6ddcSMark Murray *cp++ = IAC; 230181cb6ddcSMark Murray *cp++ = SB; 230281cb6ddcSMark Murray *cp++ = TELOPT_STATUS; 230381cb6ddcSMark Murray *cp++ = TELQUAL_SEND; 230481cb6ddcSMark Murray *cp++ = IAC; 230581cb6ddcSMark Murray *cp++ = SE; 230681cb6ddcSMark Murray if (NETROOM() >= cp - tmp) { 230781cb6ddcSMark Murray ring_supply_data(&netoring, tmp, cp-tmp); 230881cb6ddcSMark Murray printsub('>', tmp+2, cp - tmp - 2); 230981cb6ddcSMark Murray } 231081cb6ddcSMark Murray ++want_status_response; 231181cb6ddcSMark Murray return 1; 231281cb6ddcSMark Murray } 231381cb6ddcSMark Murray 231481cb6ddcSMark Murray void 23158fa113e5SMark Murray intp(void) 231681cb6ddcSMark Murray { 231781cb6ddcSMark Murray NET2ADD(IAC, IP); 231881cb6ddcSMark Murray printoption("SENT", IAC, IP); 231981cb6ddcSMark Murray flushline = 1; 232081cb6ddcSMark Murray if (autoflush) { 232181cb6ddcSMark Murray doflush(); 232281cb6ddcSMark Murray } 232381cb6ddcSMark Murray if (autosynch) { 23248fa113e5SMark Murray dosynch(NULL); 232581cb6ddcSMark Murray } 232681cb6ddcSMark Murray } 232781cb6ddcSMark Murray 232881cb6ddcSMark Murray void 23298fa113e5SMark Murray sendbrk(void) 233081cb6ddcSMark Murray { 233181cb6ddcSMark Murray NET2ADD(IAC, BREAK); 233281cb6ddcSMark Murray printoption("SENT", IAC, BREAK); 233381cb6ddcSMark Murray flushline = 1; 233481cb6ddcSMark Murray if (autoflush) { 233581cb6ddcSMark Murray doflush(); 233681cb6ddcSMark Murray } 233781cb6ddcSMark Murray if (autosynch) { 23388fa113e5SMark Murray dosynch(NULL); 233981cb6ddcSMark Murray } 234081cb6ddcSMark Murray } 234181cb6ddcSMark Murray 234281cb6ddcSMark Murray void 23438fa113e5SMark Murray sendabort(void) 234481cb6ddcSMark Murray { 234581cb6ddcSMark Murray NET2ADD(IAC, ABORT); 234681cb6ddcSMark Murray printoption("SENT", IAC, ABORT); 234781cb6ddcSMark Murray flushline = 1; 234881cb6ddcSMark Murray if (autoflush) { 234981cb6ddcSMark Murray doflush(); 235081cb6ddcSMark Murray } 235181cb6ddcSMark Murray if (autosynch) { 23528fa113e5SMark Murray dosynch(NULL); 235381cb6ddcSMark Murray } 235481cb6ddcSMark Murray } 235581cb6ddcSMark Murray 235681cb6ddcSMark Murray void 23578fa113e5SMark Murray sendsusp(void) 235881cb6ddcSMark Murray { 235981cb6ddcSMark Murray NET2ADD(IAC, SUSP); 236081cb6ddcSMark Murray printoption("SENT", IAC, SUSP); 236181cb6ddcSMark Murray flushline = 1; 236281cb6ddcSMark Murray if (autoflush) { 236381cb6ddcSMark Murray doflush(); 236481cb6ddcSMark Murray } 236581cb6ddcSMark Murray if (autosynch) { 23668fa113e5SMark Murray dosynch(NULL); 236781cb6ddcSMark Murray } 236881cb6ddcSMark Murray } 236981cb6ddcSMark Murray 237081cb6ddcSMark Murray void 23718fa113e5SMark Murray sendeof(void) 237281cb6ddcSMark Murray { 237381cb6ddcSMark Murray NET2ADD(IAC, xEOF); 237481cb6ddcSMark Murray printoption("SENT", IAC, xEOF); 237581cb6ddcSMark Murray } 237681cb6ddcSMark Murray 237781cb6ddcSMark Murray void 23788fa113e5SMark Murray sendayt(void) 237981cb6ddcSMark Murray { 238081cb6ddcSMark Murray NET2ADD(IAC, AYT); 238181cb6ddcSMark Murray printoption("SENT", IAC, AYT); 238281cb6ddcSMark Murray } 238381cb6ddcSMark Murray 238481cb6ddcSMark Murray /* 238581cb6ddcSMark Murray * Send a window size update to the remote system. 238681cb6ddcSMark Murray */ 238781cb6ddcSMark Murray 238881cb6ddcSMark Murray void 23898fa113e5SMark Murray sendnaws(void) 239081cb6ddcSMark Murray { 239181cb6ddcSMark Murray long rows, cols; 239281cb6ddcSMark Murray unsigned char tmp[16]; 23938fa113e5SMark Murray unsigned char *cp; 239481cb6ddcSMark Murray 239581cb6ddcSMark Murray if (my_state_is_wont(TELOPT_NAWS)) 239681cb6ddcSMark Murray return; 239781cb6ddcSMark Murray 239881cb6ddcSMark Murray #define PUTSHORT(cp, x) { if ((*cp++ = ((x)>>8)&0xff) == IAC) *cp++ = IAC; \ 239981cb6ddcSMark Murray if ((*cp++ = ((x))&0xff) == IAC) *cp++ = IAC; } 240081cb6ddcSMark Murray 240181cb6ddcSMark Murray if (TerminalWindowSize(&rows, &cols) == 0) { /* Failed */ 240281cb6ddcSMark Murray return; 240381cb6ddcSMark Murray } 240481cb6ddcSMark Murray 240581cb6ddcSMark Murray cp = tmp; 240681cb6ddcSMark Murray 240781cb6ddcSMark Murray *cp++ = IAC; 240881cb6ddcSMark Murray *cp++ = SB; 240981cb6ddcSMark Murray *cp++ = TELOPT_NAWS; 241081cb6ddcSMark Murray PUTSHORT(cp, cols); 241181cb6ddcSMark Murray PUTSHORT(cp, rows); 241281cb6ddcSMark Murray *cp++ = IAC; 241381cb6ddcSMark Murray *cp++ = SE; 241481cb6ddcSMark Murray if (NETROOM() >= cp - tmp) { 241581cb6ddcSMark Murray ring_supply_data(&netoring, tmp, cp-tmp); 241681cb6ddcSMark Murray printsub('>', tmp+2, cp - tmp - 2); 241781cb6ddcSMark Murray } 241881cb6ddcSMark Murray } 241981cb6ddcSMark Murray 242081cb6ddcSMark Murray void 24218fa113e5SMark Murray tel_enter_binary(int rw) 242281cb6ddcSMark Murray { 242381cb6ddcSMark Murray if (rw&1) 242481cb6ddcSMark Murray send_do(TELOPT_BINARY, 1); 242581cb6ddcSMark Murray if (rw&2) 242681cb6ddcSMark Murray send_will(TELOPT_BINARY, 1); 242781cb6ddcSMark Murray } 242881cb6ddcSMark Murray 242981cb6ddcSMark Murray void 24308fa113e5SMark Murray tel_leave_binary(int rw) 243181cb6ddcSMark Murray { 243281cb6ddcSMark Murray if (rw&1) 243381cb6ddcSMark Murray send_dont(TELOPT_BINARY, 1); 243481cb6ddcSMark Murray if (rw&2) 243581cb6ddcSMark Murray send_wont(TELOPT_BINARY, 1); 243681cb6ddcSMark Murray } 2437