char *connv = "CONNECT Command for DG AOS/VS, 5A(044) 10 Oct 92"; /* C K D C O N -- Dumb terminal connection to remote system, for AOS/VS */ /* Author: Frank da Cruz (fdc@columbia.edu, FDCCU@CUVMA.BITNET), Columbia University Center for Computing Activities. First released January 1985. Copyright (C) 1985, 1992, Trustees of Columbia University in the City of New York. Permission is granted to any individual or institution to use, copy, or redistribute this software so long as it is not sold for profit, provided this copyright notice is retained. */ /* This module brought up to 5A by Eugenia Harris at Data General. */ #nolist #include "ckcdeb.h" /* Common things first */ #include /* Signals */ #include /* Error numbers */ #include /* Kermit-specific includes */ #include "ckcasc.h" /* ASCII characters */ #include "ckcker.h" /* Kermit things */ #include "ckucmd.h" /* For xxesc() prototype */ #include "ckcnet.h" /* Network symbols */ #ifndef NOCSETS #include "ckcxla.h" /* Character set translation */ #endif /* NOCSETS */ #ifdef datageneral #include #include #include #list extern short idel_tbl[7] = {0x4,0,0,0,0,0,0}; /* delimiter table -- */ /* defaults to CR only*/ /* Globals and defines for DG multi-tasking connect command */ void readfromcommline(); /* listener sub-task */ extern int ttyfd,ttyfdout; #define TASKID 17 /* task id of readfromcommline task */ #define TASKPRI 200 /* priority of readfromcommline (was 2) */ #define STACK 02000 /* default stack size (was 0) */ #define MAXINBUF 2048 static int inbufsize = MAXINBUF; extern long times(); #endif /* datageneral */ /* Internal function prototypes */ _PROTOTYP( VOID doesc, (char) ); _PROTOTYP( VOID logchar, (char) ); _PROTOTYP( int hconne, (void) ); #ifndef SIGUSR1 /* User-defined signals */ #define SIGUSR1 30 #endif /* SIGUSR1 */ #ifndef SIGUSR2 #define SIGUSR2 31 #endif /* SIGUSR2 */ /* External variables */ extern int local, escape, duplex, parity, flow, seslog, sessft, debses, mdmtyp, ttnproto, cmask, cmdmsk, network, nettype, deblog, sosi, tnlm, xitsta, what, ttyfd, quiet, backgrd, tt_crd, tn_nlm; extern long speed; extern char ttname[], sesfil[], myhost[],*ccntab[]; #ifdef NETCONN extern int tn_init; #endif /* NETCONN */ #ifndef NOSETKEY /* Keyboard mapping */ extern KEY *keymap; /* Single-character key map */ extern MACRO *macrotab; /* Key macro pointer table */ static MACRO kmptr = NULL; /* Pointer to current key macro */ #endif /* NOSETKEY */ /* Global variables local to this module */ static int quitnow = 0, /* Q was typed */ dohangup = 0, /* H was typed */ sjval = 0, /* Setjump return value */ goterr = 0, /* I/O error flag */ active = 0, /* Lower fork active flag */ inshift = 0; /* SO/SI shift state */ outshift = 0; static char kbuf[10], *kbp; /* Keyboard buffer & pointer */ static PID_T parent_id = (PID_T)0; /* Process id of main task */ static char *ibp; /* Input buffer pointer */ static int ibc = 0; /* Input buffer count */ #define IBUFL 4096 /* Input buffer length */ static char *obp; /* Output buffer pointer */ static int obc = 0; /* Output buffer count */ #define OBUFL 1024 /* Output buffer length */ #define TMPLEN 200 /* Temp buffer length */ #ifdef DYNAMIC static char *ibuf, *obuf, *temp; /* Input, output, & temp buffers */ #else static char ibuf[IBUFL], obuf[OBUFL], temp[TMPLEN]; #endif /* DYNAMIC */ /* Character-set items */ #ifndef NOCSETS #ifdef CK_ANSIC /* ANSI C prototypes... */ extern CHAR (*xls[MAXTCSETS+1][MAXFCSETS+1])(CHAR); /* Character set */ extern CHAR (*xlr[MAXTCSETS+1][MAXFCSETS+1])(CHAR); /* translation functions */ static CHAR (*sxo)(CHAR); /* Local translation functions */ static CHAR (*rxo)(CHAR); /* for output (sending) terminal chars */ static CHAR (*sxi)(CHAR); /* and for input (receiving) terminal chars. */ static CHAR (*rxi)(CHAR); #else /* Not ANSI C... */ extern CHAR (*xls[MAXTCSETS+1][MAXFCSETS+1])(); /* Character set */ extern CHAR (*xlr[MAXTCSETS+1][MAXFCSETS+1])(); /* translation functions. */ static CHAR (*sxo)(); /* Local translation functions */ static CHAR (*rxo)(); /* for output (sending) terminal chars */ static CHAR (*sxi)(); /* and for input (receiving) terminal chars. */ static CHAR (*rxi)(); #endif /* CK_ANSIC */ extern int language; /* Current language. */ static int langsv; /* For remembering language setting. */ extern struct csinfo fcsinfo[]; /* File character set info. */ extern int tcsr, tcsl; /* Terminal character sets, remote & local. */ static int tcs; /* Intermediate ("transfer") character set. */ #ifndef NOESCSEQ /* As of edit 178, the CONNECT command will skip past ANSI escape sequences to avoid translating the characters within them. This allows the CONNECT command to work correctly when connected to a remote host that uses a 7-bit ISO 646 national character set, in which characters like '[' would normally be translated into accented characters, ruining the terminal's interpretation (and generation) of escape sequences. Escape sequences of non-ANSI/ISO-compliant terminals are not handled. */ #ifndef SKIPESC #define SKIPESC #endif /* SKIPESC */ /* States for the escape-sequence recognizer. */ #define ES_NORMAL 0 /* Normal, not in escape sequence */ #define ES_GOTESC 1 /* Current character is ESC */ #define ES_ESCSEQ 2 /* Inside an escape sequence */ #define ES_GOTCSI 3 /* Inside a control sequence */ #define ES_STRING 4 /* Inside DCS,OSC,PM, or APC string */ #define ES_TERMIN 5 /* 1st char of string terminator */ static int skipesc = 0, /* Skip over ANSI escape sequences */ inesc = ES_NORMAL; /* State of sequence recognizer */ /* ANSI escape sequence handling. Only the 7-bit form is treated, because translation is not a problem in the 8-bit environment, in which all GL characters are ASCII and no translation takes place. So we don't check for the 8-bit single-character versions of CSI, DCS, OSC, APC, or ST. Here is the ANSI sequence recognizer state table, followed by the code that implements it. Definitions: CAN = Cancel 01/08 Ctrl-X SUB = Substitute 01/10 Ctrl-Z DCS = Device Control Sequence 01/11 05/00 ESC P CSI = Control Sequence Introducer 01/11 05/11 ESC [ ST = String Terminator 01/11 05/12 ESC \ OSC = Operating System Command 01/11 05/13 ESC ] PM = Privacy Message 01/11 05/14 ESC ^ APC = Application Program Command 01/11 05/15 ESC _ ANSI escape sequence recognizer: State Input New State ; Commentary NORMAL (start) ; Start in NORMAL state (any) CAN NORMAL ; ^X cancels (any) SUB NORMAL ; ^Z cancels NORMAL ESC GOTESC ; Begin escape sequence NORMAL other ; NORMAL control or graphic character GOTESC ESC ; Start again GOTESC [ GOTCSI ; CSI GOTESC P STRING ; DCS introducer, consume through ST GOTESC ] STRING ; OSC introducer, consume through ST GOTESC ^ STRING ; PM introducer, consume through ST GOTESC _ STRING ; APC introducer, consume through ST GOTESC 0..~ NORMAL ; 03/00 through 17/14 = Final character GOTESC other ESCSEQ ; Intermediate or ignored control character ESCSEQ ESC GOTESC ; Start again ESCSEQ 0..~ NORMAL ; 03/00 through 17/14 = Final character ESCSEQ other ; Intermediate or ignored control character GOTCSI ESC GOTESC ; Start again GOTCSI @..~ NORMAL ; 04/00 through 17/14 = Final character GOTCSI other ; Intermediate char or ignored control char STRING ESC TERMIN ; Maybe have ST STRING other ; Consume all else TERMIN \ NORMAL ; End of string TERMIN other STRING ; Still in string */ /* chkaes() -- Check ANSI Escape Sequence. Call with EACH character in input stream. Sets global inesc variable according to escape sequence state. */ VOID #ifdef CK_ANSIC chkaes(char c) #else chkaes(c) char c; #endif /* CK_ANSIC */ /* chkaes */ { if (c == CAN || c == SUB) /* CAN and SUB cancel any sequence */ inesc = ES_NORMAL; else /* Otherwise */ switch (inesc) { /* enter state switcher */ case ES_NORMAL: /* NORMAL state */ if (c == ESC) /* Got an ESC */ inesc = ES_GOTESC; /* Change state to GOTESC */ break; /* Otherwise stay in NORMAL state */ case ES_GOTESC: /* GOTESC state */ if (c == '[') /* Left bracket after ESC is CSI */ inesc = ES_GOTCSI; /* Change to GOTCSI state */ else if (c > 057 && c < 0177) /* Final character '0' thru '~' */ inesc = ES_NORMAL; /* Back to normal */ else if (c == 'P' || (c > 0134 && c < 0140)) /* P, [, ^, or _ */ inesc = ES_STRING; /* Switch to STRING-absorption state */ else if (c != ESC) /* ESC in an escape sequence... */ inesc = ES_ESCSEQ; /* starts a new escape sequence */ break; /* Intermediate or ignored ctrl char */ case ES_ESCSEQ: /* ESCSEQ -- in an escape sequence */ if (c > 057 && c < 0177) /* Final character '0' thru '~' */ inesc = ES_NORMAL; /* Return to NORMAL state. */ else if (c == ESC) /* ESC ... */ inesc = ES_GOTESC; /* starts a new escape sequence */ break; /* Intermediate or ignored ctrl char */ case ES_GOTCSI: /* GOTCSI -- In a control sequence */ if (c > 077 && c < 0177) /* Final character '@' thru '~' */ inesc = ES_NORMAL; /* Return to NORMAL. */ else if (c == ESC) /* ESC ... */ inesc = ES_GOTESC; /* starts over. */ break; /* Intermediate or ignored ctrl char */ case ES_STRING: /* Inside a string */ if (c == ESC) /* ESC may be 1st char of terminator */ inesc = ES_TERMIN; /* Go see. */ break; /* Absorb all other characters. */ case ES_TERMIN: /* May have a string terminator */ if (c == '\\') /* which must be backslash */ inesc = ES_NORMAL; /* If so, back to NORMAL */ else /* Otherwise */ inesc = ES_STRING; /* Back to string absorption. */ } } #endif /* NOESCSEQ */ #endif /* NOCSETS */ /* Connect state parent/child communication signal handlers */ static jmp_buf con_env; /* Environment pointer for connect errors */ /* Note: Some C compilers (e.g. Cray UNICOS) interpret the ANSI C standard about setjmp() in a way that disallows constructions like: if ((var = setjmp(env)) == 0) ... which prevents the value returned by longjmp() from being used at all. So the following handlers set a global variable instead. */ static SIGTYP conn_int(foo) int foo; { /* Modem read failure handler, */ signal(SIGUSR1,SIG_IGN); /* Disarm the interrupt */ sjval = 1; /* Set global variable */ longjmp(con_env,sjval); /* Notifies parent process to stop */ } static SIGTYP mode_chg(foo) int foo; { signal(SIGUSR2,mode_chg); /* Re-arm the signal. */ duplex = 1 - duplex; /* Toggle duplex mode. */ debug(F101,"mode_chg duplex","",duplex); } /* C K C P U T F -- C-Kermit CONNECT Put Character to Screen */ /* Output is buffered to avoid slow screen writes on fast connections. */ int ckcputf() { /* Dump the output buffer */ int x = 0; if (obc > 0) /* If we have any characters, */ x = conxo(obc,obuf); /* dump them, */ obp = obuf; /* reset the pointer */ obc = 0; /* and the counter. */ return(x); /* Return conxo's return code */ } /* C K C P U T C -- C-Kermit CONNECT Put Character to Screen */ /* Output is buffered to avoid slow screen writes on fast connections. */ int ckcputc(c) int c; { int x; *obp++ = c & 0xff; /* Deposit the character */ obc++; /* Count it */ if (ibc == 0 || /* If input buffer empty */ obc == OBUFL) { /* or output buffer full */ debug(F101,"CKCPUTC obc","",obc); x = conxo(obc,obuf); /* dump the buffer, */ obp = obuf; /* reset the pointer */ obc = 0; /* and the counter. */ return(x); /* Return conxo's return code */ } else return(0); } /* C K C G E T C -- C-Kermit CONNECT Get Character */ /* Buffered read from communication device. Returns the next character, refilling the buffer if necessary. On error, returns ttinc's return code (see ttinc() description). Dummy argument for compatible calling conventions with ttinc(). */ int ckcgetc(dummy) int dummy; { int c, n; debug(F101,"CKCGETC 1 ibc","",ibc); /* Log */ if (ibc < 1) { /* Need to refill buffer? */ ibc = 0; /* Yes, reset count */ ibp = ibuf; /* and buffer pointer */ debug(F100,"CKCGETC 1 calling ttinc(0)","",0); /* Log */ c = ttinc(0); /* Read one character, blocking */ debug(F101,"CKCGETC 1 ttinc(0)","",c); /* Log */ if (c < 0) { /* If error, return error code */ return(c); } else { /* Otherwise, got one character */ *ibp++ = c; /* Advance buffer pointer */ ibc++; /* and count. */ } /* Now quickly read any more that might have arrived */ if ((n = ttchk()) > 0) { /* Any more waiting? */ if (n > (IBUFL - ibc)) /* Get them all at once. */ n = IBUFL - ibc; /* Don't overflow buffer */ if ((n = ttxin(n,(CHAR *)ibp)) > 0) { ibp += n; /* Advance pointer */ ibc += n; /* and counter */ } else return (-1); } debug(F101,"CKCGETC 2 ibc","",ibc); /* Log how many */ ibp = ibuf; } c = *ibp++ & 0xff; /* Get next character from buffer */ ibc--; /* Reduce buffer count */ return(c); /* Return the character */ } /* C O N E C T -- Perform terminal connection */ int conect() { PID_T pid; /* Process id of child (modem reader) */ int n; /* General purpose counter */ int c; /* c is a character, but must be signed integer to pass thru -1, which is the modem disconnection signal, and is different from the character 0377 */ int c2; /* A copy of c */ int csave; /* Another copy of c */ int num; /* Another counter - used with dgncinb() */ char ch; /* Ditto here */ #ifdef DYNAMIC if (!(ibuf = malloc(IBUFL+1))) { /* Allocate input line buffer */ printf("Sorry, CONNECT input buffer can't be allocated\n"); return(0); } if (!(obuf = malloc(OBUFL+1))) { /* Allocate input line buffer */ printf("Sorry, CONNECT output buffer can't be allocated\n"); free(ibuf); ibuf = 0; return(0); } if (!(temp = malloc(TMPLEN+1))) { /* Allocate temporary buffer */ printf("Sorry, CONNECT temporary buffer can't be allocated\n"); free(ibuf); ibuf = 0; free(obuf); obuf = 0; return(0); } #endif /* DYNAMIC */ if (!local) { #ifdef NETCONN printf("Sorry, you must SET LINE or SET HOST first\n"); #else printf("Sorry, you must SET LINE first\n"); #endif /* NETCONN */ return(0); } if (backgrd) { printf( "\r\nSorry, Kermit's CONNECT command can be used only in the foreground\r\n"); return(0); } if (speed < 0L && network == 0) { printf("Sorry, you must SET SPEED first\n"); return(0); } #ifdef TCPSOCKET if (network && (nettype != NET_TCPB)) { printf("Sorry, network type not supported\n"); return(0); } #endif /* TCPSOCKET */ if (ttyfd < 0) { /* If communication device not open */ debug(F111,"ckdcon opening",ttname,0); /* Open it now */ if (ttopen(ttname,&local,mdmtyp,0) < 0) { sprintf(temp,"Sorry, can't open %s",ttname); perror(temp); debug(F110,"ckdcon open failure",temp,0); #ifdef DYNAMIC if (ibuf) free(ibuf); ibuf = 0; if (obuf) free(obuf); obuf = 0; if (temp) free(temp); temp = 0; #endif /* DYNAMIC */ return(0); } } dohangup = 0; /* Hangup not requested yet */ if (!quiet) { #ifdef NETCONN if (network) { printf("Connecting to host %s",ttname); } else { #endif /* NETCONN */ printf("Connecting to %s",ttname); if (speed > -1L) printf(", speed %ld",speed); #ifdef NETCONN } #endif /* NETCONN */ printf(".\r\nThe escape character is %s (ASCII %d).\r\n", dbchr(escape),escape); printf("Type the escape character followed by C to get back,\r\n"); printf("or followed by ? to see other options.\r\n"); if (seslog) { printf("(Session logged to %s, ",sesfil); printf("%s)\r\n", sessft ? "binary" : "text"); } if (debses) printf("Debugging Display...)\r\n"); } /* Condition console terminal and communication line */ if (conbin(escape) < 0) { printf("Sorry, can't condition console terminal\n"); #ifdef DYNAMIC if (ibuf) free(ibuf); ibuf = 0; if (obuf) free(obuf); obuf = 0; if (temp) free(temp); temp = 0; #endif /* DYNAMIC */ return(0); } debug(F101,"connect cmask","",cmask); debug(F101,"connect cmdmsk","",cmdmsk); goterr = 0; if ((n = ttvt(speed,flow)) < 0) { /* Enter "virtual terminal" mode */ debug(F101,"CONNECT ttvt","",n); goterr = 1; /* Error recovery... */ tthang(); /* Hang up and close the device. */ ttclos(0); if (ttopen(ttname,&local,mdmtyp,0) < 0) { /* Open it again... */ sprintf(temp,"Sorry, can't reopen %s",ttname); perror(temp); #ifdef DYNAMIC if (ibuf) free(ibuf); ibuf = 0; if (obuf) free(obuf); obuf = 0; if (temp) free(temp); temp = 0; #endif /* DYNAMIC */ return(0); } if (ttvt(speed,flow) < 0) { /* Try virtual terminal mode again. */ conres(); /* Failure this time is fatal. */ printf("Sorry, Can't condition communication line\n"); #ifdef DYNAMIC if (ibuf) free(ibuf); ibuf = 0; if (obuf) free(obuf); obuf = 0; if (temp) free(temp); temp = 0; #endif /* DYNAMIC */ return(0); } #ifdef NETCONN if (network && ttnproto == NP_TELNET) tn_ini(); /* Just in case ttopen didn't... */ #endif /* NETCONN */ } debug(F101,"connect ttvt ok, escape","",escape); #ifndef NOCSETS /* Set up character set translations */ tcs = gettcs(tcsr,tcsl); if (tcsr == tcsl) { /* Remote and local sets the same? */ sxo = rxo = NULL; /* If so, no translation. */ sxi = rxi = NULL; } else { /* Otherwise, set up */ sxo = xls[tcs][tcsl]; /* translation function */ rxo = xlr[tcs][tcsr]; /* pointers for output functions */ sxi = xls[tcs][tcsr]; /* and for input functions. */ rxi = xlr[tcs][tcsl]; } /* This is to prevent use of zmstuff() and zdstuff() by translation functions. They only work with disk i/o, not with communication i/o. Luckily Russian translation functions don't do any stuffing... */ langsv = language; #ifndef NOCYRIL if (language != L_RUSSIAN) #endif /* NOCYRIL */ language = L_USASCII; #ifdef SKIPESC /* We need to activate the "skip escape sequence" feature when: (a) translation is elected, and (b) the local and/or remote set is 7-bit set other than US ASCII. */ skipesc = (tcs != TC_TRANSP) && /* Not transparent */ (fcsinfo[tcsl].size == 128 || fcsinfo[tcsr].size == 128) && /* 7 bits */ (fcsinfo[tcsl].code != FC_USASCII); /* But not ASCII */ inesc = ES_NORMAL; /* Initial state of recognizer */ #ifdef COMMENT debug(F101,"tcs","",tcs); debug(F101,"tcsl","",tcsl); debug(F101,"tcsr","",tcsr); debug(F101,"fcsinfo[tcsl].size","",fcsinfo[tcsl].size); debug(F101,"fcsinfo[tcsr].size","",fcsinfo[tcsr].size); #endif /* COMMENT */ debug(F101,"skipesc","",skipesc); #endif /* SKIPESC */ #endif /* NOCSETS */ /* This is a label we jump back to when the lower fork senses the need to change modes. */ newfork: debug(F100,"CONNECT starting readfromcommline task","",0); parent_id = getpid(); /* Get pid for signalling */ signal(SIGUSR1,SIG_IGN); /* Don't kill myself */ /* ENH - DG specifics inserted here - we do an mtask instead of a vfork */ /* of the code that listens to the comm line and writes to the console */ /* -- that task is called readfromcommline */ /* ENH - commented next because timeouts should be handled with signals now */ /* setto(channel(ttyfdout),60); */ /* Set output timeouts to 60 seconds */ /* setto(channel(ttyfd),2); */ /* Set input timeouts to 2 seconds */ mfinit(stdout,1); /* Protect output to terminal screen */ if (mtask(readfromcommline, STACK, TASKID, TASKPRI) != 0) { conres(); /* Reset the console. */ perror("Can't create readfromcommline fork"); if (!quiet) { printf("\r\nCommunications disconnect (Back at %s)\r\n", *myhost ? myhost : "local MV system"); } printf("\n"); what = W_NOTHING; /* So console modes are set right. */ #ifndef NOCSETS language = langsv; /* Restore language */ #endif /* NOCSETS */ parent_id = (PID_T) 0; /* Clean up */ #ifdef DYNAMIC if (ibuf) free(ibuf); ibuf = 0; if (obuf) free(obuf); obuf = 0; if (temp) free(temp); temp = 0; #endif /* DYNAMIC */ return(1); } else { /* otherwise start reading from the keyboard (or script) */ what = W_CONNECT; /* Keep track of what we're doing */ active = 1; debug(F101,"CONNECT mtask succeeded, duplex:","",duplex); /* Catch communication errors or mode changes in lower fork */ if (setjmp(con_env) == 0) { /* Normal entry... */ sjval = 0; /* Initialize setjmp return code. */ signal(SIGUSR1,conn_int); /* Routine for child process exit. */ signal(SIGUSR2,mode_chg); /* Routine for mode change. */ } /* Here is the big loop that gets characters from the keyboard and sends them out the communication device. There are two components to the communication path: the connection from the keyboard to C-Kermit, and from C-Kermit to the remote computer. The treatment of the 8th bit of keyboard characters is governed by SET COMMAND BYTESIZE (cmdmsk). The treatment of the 8th bit of characters sent to the remote is governed by SET TERMINAL BYTESIZE (cmask). This distinction was introduced in edit 5A(164). */ while (active) { #ifndef NOSETKEY if (kmptr) { /* Have current macro? */ debug(F100,"kmptr non NULL","",0); if ((c = (CHAR) *kmptr++) == NUL) { /* Get char from it */ kmptr = NULL; /* If no more chars, */ debug(F100,"macro empty, continuing","",0); continue; /* reset pointer and continue */ } debug(F000,"char from macro","",c); } else /* No macro... */ #endif /* NOSETKEY */ setto(channel(0),2); /* Set device timeout to 2 secs */ while (active) { /* Make sure connection still there */ /* terrible kludge calling dgncinb() directly -- we do it so we can set the device timeout and thus prevent this read from hanging forever when the remote has disconnected -- all so that we'll pop back to the prompt when the disconnect occurs */ num = dgncinb(0,&ch,1); /* Get one keyboard char */ if (num != 1) { if ((num == 0) || (num == -2)) /* Keep trying on */ continue; /* timeout or none */ else { /* Otherwise it's a*/ c == -1; /* VS error or EOF */ break; /* dealt w/ in a sec */ } } else { c = ch & 0377; /* Got a good one */ break; /* Get out of here */ } } resto(channel(0)); /* Undo the device timeout */ if (!active) /* If remote disconnected */ break; /* Get out */ if (c == -1) { /* If read() got an error... */ conoc(BEL); /* Beep */ break; /* and terminate the read loop */ } /* debug(F111,"** KEYB",dbchr(c),c); */ c &= cmdmsk; /* Do any requested masking */ #ifndef NOSETKEY /* Note: kmptr is NULL if we got character c from the keyboard, and it is not NULL if it came from a macro. In the latter case, we must avoid expanding it again. */ if (!kmptr && macrotab[c]) { /* Macro definition for c? */ kmptr = macrotab[c]; /* Yes, set up macro pointer */ continue; /* and restart the loop, */ } else c = keymap[c]; /* else use single-char keymap */ #endif /* NOSETKEY */ if ( #ifndef NOSETKEY !kmptr && #endif /* NOSETKEY */ ((c & 0x7f) == escape)) { /* Escape character? */ debug(F000,"connect got escape","",c); c = congks(0) & 0177; /* Got esc, get its arg */ /* No key mapping here */ doesc(c); /* Now process it */ } else { /* It's not the escape character */ csave = c; /* Save it before translation */ /* for local echoing. */ #ifndef NOCSETS #ifndef SKIPESC /* Translate character sets */ if (sxo) c = (*sxo)(c); /* From local to intermediate. */ if (rxo) c = (*rxo)(c); /* From intermediate to remote. */ #else if (inesc == ES_NORMAL) { /* If not inside escape seq.. */ /* Translate character sets */ if (sxo) c = (*sxo)(c); /* Local to intermediate. */ if (rxo) c = (*rxo)(c); /* Intermediate to remote. */ } if (skipesc) chkaes(c); /* Check escape sequence status */ #endif /* SKIPESC */ #endif /* NOCSETS */ /* If Shift-In/Shift-Out is selected and we have a 7-bit connection, handle shifting here. */ if (sosi) { /* Shift-In/Out selected? */ if (cmask == 0177) { /* In 7-bit environment? */ if (c & 0200) { /* 8-bit character? */ if (outshift == 0) { /* If not shifted, */ ttoc(dopar(SO)); /* shift. */ outshift = 1; } } else { if (outshift == 1) { /* 7-bit character */ ttoc(dopar(SI)); /* If shifted, */ outshift = 0; /* unshift. */ } } } if (c == SO) outshift = 1; /* User typed SO */ if (c == SI) outshift = 0; /* User typed SI */ } c &= cmask; /* Apply Kermit-to-host mask now. */ if (c == '\015') { if (tnlm /* TEMINAL NEWLINE ON */ #ifdef TNCODE /* And for TELNET... */ || (network && ttnproto == NP_TELNET) #endif /* TNCODE */ ) { ttoc(dopar('\015')); /* Send CR */ if (duplex) conoc('\015'); /* Maybe echo CR */ #ifdef TNCODE if (network && !tn_nlm && ttnproto == NP_TELNET) c = '\0'; /* Stuff NUL */ else #endif /* TNCODE */ c = '\012'; /* Stuff LF */ csave = c; } } /* Now go on to process LF or NUL */ #ifdef TNCODE /* If user types the 0xff character (TELNET IAC), it must be doubled. */ else if (c == IAC && network && ttnproto == NP_TELNET) { /* Send one copy now */ ttoc(IAC); /* and the other one just below. */ } #endif /* TNCODE */ /* Send the character */ if (ttoc(dopar(c)) > -1) { if (duplex) { /* If half duplex, must echo */ if (debses) conol(dbchr(csave)); /* the original char */ else /* not the translated one */ conoc(csave); if (seslog) { /* And maybe log it too */ c2 = csave; if (sessft == 0 && csave == '\r') c2 = '\n'; logchar(c2); } } } else if (active){ /* UNIX doesn't check for active */ perror("\r\nCan't send character"); break; /* UNIX clears active flag instead */ } } } midkill(TASKID); /* kill comm line reader task */ if (sjval == 1) { /* Read error on comm device */ dohangup = 1; #ifdef NETCONN if (network) { ttclos(0); } #endif /* NETCONN */ } if (sjval == 2) /* If it was a mode change, go back */ goto newfork; /* and coordinate with other fork. */ conres(); /* Reset the console. */ if (quitnow) doexit(GOOD_EXIT,xitsta); /* Exit now if requested. */ if (dohangup > 0) { #ifndef NODIAL if (dohangup > 1) /* If hangup requested, do that. */ if (mdmhup() < 1) /* Try via modem first */ #endif /* NODIAL */ tthang(); /* And make sure we don't hang up */ dohangup = 0; /* again unless requested again. */ } mfinit(stdout,0); /* Un-protect output to screen */ what = W_NOTHING; /* So console modes set right. */ #ifndef NOCSETS language = langsv; /* Restore language */ #endif /* NOCSETS */ parent_id = (PID_T) 0; #ifdef DYNAMIC if (ibuf) free(ibuf); ibuf = 0; if (obuf) free(obuf); obuf = 0; if (temp) free(temp); temp = 0; #endif /* DYNAMIC */ return(1); } /* else */ } void readfromcommline() { int c; int i; int n; int tx,x; /* variables needed for tn_doop code */ if (priv_can()) { /* Cancel all privs */ printf("?setuid error - fatal\n"); doexit(BAD_EXIT,-1); } signal(SIGINT, SIG_IGN); /* In case these haven't been */ signal(SIGQUIT, SIG_IGN); /* inherited from above... */ inshift = outshift = 0; /* Initial shift state. */ sleep(1); /* Wait for parent's handler setup. */ ibp = ibuf; /* Initialize input buffering */ ibc = 0; /* And output buffering. */ obp = obuf; obc = 0; debug(F100,"CONNECT starting port task (readfromcommline)","",0); while (active) { /* Fresh read, wait for a character. */ /* Get the next communication line character from our internal buffer. If the buffer is empty, refill it. */ c = ckcgetc(0); /* Get next character */ /* debug(F101,"CONNECT c","",c); */ if (c < 0) { active = 0; /* deviation from unix code */ if (!quiet) { /* Failed... */ printf("\r\nCommunications disconnect (Back at %s)\r\n", *myhost ? myhost : "local MV system"); if ( c == -3) perror("\r\nCan't read character"); } #ifndef NODIAL if (mdmhup() < 1) #endif /* NODIAL */ tthang(); /* Hang up our side. */ sjval = 1; /* Notify parent - kludge */ for (;;) pause(); /* Wait to be killed */ } debug(F111,"** PORT",dbchr(c),c); #ifdef TNCODE /* Handle TELNET negotiations here */ if (c == IAC && network && ttnproto == NP_TELNET) { debug(F111,"got IAC from port",dbchr(c),c); ckcputf(); /* Dump output buffer */ tx = tn_doop((c & 0xff),duplex,ckcgetc); debug(F111,"tn_doop returns ","",tx); if (tx == 0) continue; else if (tx == -1) { /* I/O error */ if (active && !quiet) printf("\r\nCommunications disconnect (Back at %s)\r\n", *myhost ? myhost : "local MV system"); active = 0; sjval = 1; /* Notify parent - kludge */ for (;;) pause(); /* Wait to be killed. */ } else if ((tx == 1) && (!duplex)) { /* ECHO change */ if (parent_id) kill(parent_id,SIGUSR2); /* Tell the parent */ duplex = 1; } else if ((tx == 2) && (duplex)) { /* ECHO change */ if (parent_id) kill(parent_id,SIGUSR2); duplex = 0; } else if (tx == 3) { /* Quoted IAC */ c = 255; } else continue; /* Negotiation OK, get next char. */ } #endif /* TNCODE */ if (debses) { /* Output character to screen */ char *s; /* Debugging display... */ s = dbchr(c); while (*s) ckcputc(*s++); } else { /* or regular display ... */ c &= cmask; /* Apply Kermit-to-remote mask */ if (sosi) { /* Handle SI/SO */ if (c == SO) { /* Shift Out */ inshift = 1; continue; } else if (c == SI) { /* Shift In */ inshift = 0; continue; } if (inshift) c |= 0200; } #ifndef NOCSETS #ifndef SKIPESC /* Translate character sets */ if (sxi) c = (*sxi)(c); if (rxi) c = (*rxi)(c); #else if (inesc == ES_NORMAL) { /* Translate character sets */ if (sxi) c = (*sxi)(c); if (rxi) c = (*rxi)(c); } if (skipesc) chkaes(c); /* Adjust escape sequence status */ #endif /* SKIPESC */ #endif /* NOCSETS */ c &= cmdmsk; /* Apply command mask. */ if (c == CR && tt_crd) { /* SET TERM CR-DISPLAY CRLF ? */ ckcputc(c); /* Yes, output CR */ if (seslog) logchar(c); c = LF; /* and insert a linefeed */ } ckcputc(c); /* Output to screen */ if (seslog) logchar(c); /* Take care of session log */ } } } /* H C O N N E -- Give help message for connect. */ int hconne() { int c; static char *hlpmsg[] = { "\r\n ? for this message", "\r\n 0 (zero) to send a null", "\r\n B to send a BREAK", #ifdef NETCONN "\r\n I to send a network interrupt packet", #ifdef TCPSOCKET "\r\n A to send Are You There?", #endif /* TCPSOCKET */ #endif /* NETCONN */ "\r\n H to hangup and close the connection", "\r\n Q to hangup and quit Kermit", "\r\n S for status", "\r\n ! to push to local shell", "\r\n \\ backslash code:", "\r\n \\nnn decimal character code", "\r\n \\Onnn octal character code", "\r\n \\Xhh hexadecimal character code", "\r\n terminate with carriage return.", "\r\n type the escape character twice to send the escape character", "\r\n space-bar to resume the CONNECT command\r\n\r\n", "" }; conol("\r\nPress C to return to "); conol(*myhost ? myhost : "the C-Kermit prompt"); conol(", or:"); conola(hlpmsg); /* Print the help message. */ conol("Command>"); /* Prompt for command. */ c = congks(0) & 0177; /* Get character, strip any parity. */ /* No key mapping or translation here */ if (c != CMDQ) conoll(""); return(c); /* Return it. */ } /* D O E S C -- Process an escape character argument */ VOID #ifdef CK_ANSIC doesc(char c) #else doesc(c) char c; #endif /* CK_ANSIC */ /* doesc */ { CHAR d, buf[3]; while (1) { if (c == escape) { /* Send escape character */ d = dopar(c); ttoc(d); return; } else /* Or else look it up below. */ if (isupper(c)) c = tolower(c); switch(c) { case 'c': /* Close connection */ case '\03': active = 0; conol("\r\n"); return; case 'b': /* Send a BREAK signal */ case '\02': ttsndb(); return; #ifdef NETCONN case 'i': /* Send Interrupt */ case '\011': #ifdef TCPSOCKET #ifndef IP #define IP 244 #endif /* IP */ if (network && ttnproto == NP_TELNET) { /* TELNET */ buf[0] = (CHAR) IAC; /* I Am a Command */ buf[1] = (CHAR) IP; /* Interrupt Process */ ttol(buf,2); } else #endif /* TCPSOCKET */ conoc(BEL); return; #ifdef TCPSOCKET case 'a': /* "Are You There?" */ case '\01': #ifndef AYT #define AYT 246 #endif /* AYT */ if (network && ttnproto == NP_TELNET) { buf[0] = (CHAR) IAC; /* I Am a Command */ buf[1] = (CHAR) AYT; /* Are You There? */ ttol(buf,2); } else conoc(BEL); return; #endif /* TCPSOCKET */ #endif /* NETCONN */ case 'h': /* Hangup */ /* case '\010': */ /* Too dangerous */ dohangup = 2; active = 0; conol("\r\nHanging up "); return; case 'q': quitnow = 1; active = 0; conol("\r\n"); return; case 's': /* Status */ sprintf(temp, "\r\nConnected %s %s", network ? "to" : "through", ttname); conol(temp); if (speed >= 0L) { sprintf(temp,", speed %ld",speed); conol(temp); } sprintf(temp,", %d terminal bits",(cmask == 0177) ? 7 : 8); conol(temp); if (parity) { conol(", "); switch (parity) { case 'e': conol("even"); break; case 'o': conol("odd"); break; case 's': conol("space"); break; case 'm': conol("mark"); break; } conol(" parity"); } if (seslog) { conol(", logging to "); conol(sesfil); } conoll(""); if (!network) shomdm(); return; case '?': /* Help */ c = hconne(); continue; case '0': /* Send a null */ c = '\0'; d = dopar(c); ttoc(d); return; #ifndef NOPUSH case '@': /* Start inferior command processor */ case '!': conres(); /* Put console back to normal */ zshcmd(""); /* Fork a shell. */ if (conbin(escape) < 0) { printf("Error resuming CONNECT session\n"); active = 0; } return; #endif /* NOPUSH */ case SP: /* Space, ignore */ return; default: /* Other */ if (c == CMDQ) { /* Backslash escape */ int x; kbp = kbuf; *kbp++ = c; while (((c = (congks(0) & cmdmsk)) != '\r') && (c != '\n')) *kbp++ = c; *kbp = NUL; kbp = kbuf; x = xxesc(&kbp); /* Interpret it */ if (x >= 0) { /* No key mapping here */ c = dopar(x); ttoc(c); return; } else { /* Invalid backslash code. */ conoc(BEL); return; } } conoc(BEL); return; /* Invalid esc arg, beep */ } } } VOID #ifdef CK_ANSIC logchar(char c) #else logchar(c) char c; #endif /* CK_ANSIC */ /* logchar */ { /* Log character c to session log */ if (seslog) if ((sessft != 0) || (c != '\r' && c != '\0' && c != XON && c != XOFF)) if (zchout(ZSFILE,c) < 0) { conoll(""); conoll("ERROR WRITING SESSION LOG, LOG CLOSED!"); seslog = 0; } }