/*+-------------------------------------------------------------------------	dceHA24.c - DCE-specific portion of generic SCO UUCP dialer	Driver for generic Hayes-style 2400 baud modem	wht@n4hgf.Mt-Park.GA.US Necessary DCE switch setting or other configuration:   enable onhook upon loss of DTR--------------------------------------------------------------------------*//*+:EDITS:*//*:09-10-1992-13:59-wht@n4hgf-ECU release 3.20 *//*:08-22-1992-15:38-wht@n4hgf-ECU release 3.20 BETA *//*:02-02-1992-18:01-root@n4hgf-proper ordering of DCE_result entries *//*:01-26-1992-15:30-wht@n4hgf-gendial 1.2 for ecu 3.20- better hangup *//*:07-25-1991-12:58-wht@n4hgf-ECU release 3.10 *//*:04-16-1991-18:18-wht@n4hgf-creation from template */#include "dialer.h"/* * DCE_DTR_low_msec - milliseconds to hold DTR low to ensure DCE *                    sees the transition; this value may be changed *                    as necessary before each call to lflash_DTR(), * but, generally, a constant value will do. */long DCE_DTR_low_msec = 750L;/* * DCE_DTR_high_msec - milliseconds DTR must remain high before the *                     DCE may be expected to be ready to be commanded */long DCE_DTR_high_msec = 1500L;/* * DCE_write_pace_msec - milliseconds to pause between each character *                       sent to the DCE (zero if streaming I/O is *                       permitted); this value may be changed as * necessary before each call to lwrite(), but, generally, a constant * value will do.  Note that this value is used to feed a value to Nap(), * which has a granularity of .010 seconds on UNIX/386, .020 on XENIX/286 * and .050 seconds on XENIX/86. */long DCE_write_pace_msec = 40;/* * DCE_name     - short name for DCE * DCE_revision - revision number for this module */char *DCE_name = "generic AT-cmd 2400";char *DCE_revision = "1.21";/* * DCE_hangup_CBAUD - baud rate to use for hanging up DCE *                    and readying it for dial in access *                    (BXXX mask); use a value of zero if the speed *                    specified by the invoker is to be used. * This value is useful for DCEs such as the early Hayes 2400 * which are so unfortunately compatible with their 1200 predecessor * that they refuse to answer at 2400 baud unless you last spoke to * them at that rate. For such bad boys, use B2400 below. */int DCE_hangup_CBAUD = B2400;/* * DCE_results - a table of DCE response strings and a token *               code for each; when you call lread() or lread_ignore(), *               if the read routine detects one of the strings, * the appropriate code is returned.  If no string matches, then * lread()/lread_ignore examines the DCE result string for a * numeric value; if one is found, the numeric value or'd with * 0x4000 is returned (in this way, e.g., you can read "modem * S registers."  If nothing agrees with this search, lread() * will abort the program with RC|FAIL|RCE_TIMOUT, lread_ignore() * will return -1.  You may use any value between 0 and 0x3FFFFFFF. * This module is the only consumer  of the codes, although they * are decoded by gendial.c's _lread(). * * If one possible result is an "early substring" of another, like * "CONNECT" is of "CONNECT 1200", then put such results later in the * table than the larger result. * */#define rfConnect		0x00400000#define rfMASK			0x000000FF#define rOk				0#define rNoCarrier		1#define rError			2#define rNoDialTone		3#define rBusy			4#define rNoAnswer		5#define rConnect300		(7 | rfConnect)#define rConnect1200	(8 | rfConnect)#define rConnect2400	(9 | rfConnect)DCE_RESULT DCE_results[] ={	{ "OK",						rOk,			},	{ "NO CARRIER",				rNoCarrier,		},	{ "ERROR",					rError			},	{ "NO DIALTONE",			rNoDialTone,	},	{ "BUSY",					rBusy			},	{ "NO ANSWER",				rNoAnswer		},	{ "CONNECT 1200",			rConnect1200	},	{ "CONNECT 2400",			rConnect2400	},	{ "CONNECT",				rConnect300		},	{ (char *)0,				-1				}		/* end table */};/*+-------------------------------------------------------------------------	DCE_baud_to_CBAUD(baud) - check for valid baud rates supported by DCE  DCE dependent function must validate baud rates supported by DCE  returns baud rate in struct termio c_cflag fashion  or terminates program with error--------------------------------------------------------------------------*/intDCE_baud_to_CBAUD(baud)unsigned int baud;{	switch(baud)	{		case 50:   return(B50);		/* delete the ones you dont handle */		case 75:   return(B75);		case 110:  return(B110);		case 134:  return(B134);		case 150:  return(B150);		case 300:  return(B300);		case 1200: return(B1200);		case 2400: return(B2400);		case 4800: return(B4800);		case 9600: return(B9600);#if defined(B19200)		case 19200: return(B19200);#else#ifdef EXTA		case 19200: return(EXTA);#endif#endif#if defined(B38400)		case 38400: return(B38400);#else#ifdef EXTB		case 38400: return(EXTB);#endif#endif	}	myexit(RC_FAIL | RCE_SPEED);#if defined(OPTIMIZE) || defined(__OPTIMIZE__)	/* don't complain */	return(0);	/* keep gcc from complaining about no rtn at end */#endif}	/* end of DCE_baud_to_CBAUD *//*+-------------------------------------------------------------------------	DCE_hangup() - issue hangup command to DCEThis function should do whatever is necessary to ensure1) any active connection is terminated2) the DCE is ready to receive an incoming call if DTR is asserted3) the DCE will not accept an incoming call if DTR is falseThe function should return when done.You must set any switches necessary to make modem hang up on loss of DTR--------------------------------------------------------------------------*/voidDCE_hangup(){int itmp;int maxretry = 4;	DEBUG(1,"--> hanging up %s\n",dce_name);	lflash_DTR();	/*	 * set up modem	 */	for(itmp = 0; itmp < maxretry; itmp++)	{		lwrite("ATS0=1M0Q0V1X3\r");		if(lread(5) == rOk)			break;	}	if(itmp == maxretry)	{		DEBUG(1,"failed to reset modem\n",0);		myexit(RC_FAIL | RCE_TIMOUT);	}	/*	 * shut up - no result codes	 */	lwrite("ATQ1\r");}	/* end of DCE_hangup *//*+-------------------------------------------------------------------------	DCE_dial(telno) - dial a remote DCEThis function should connect to the remote DCE and use any successindication to modify the tty baud rate if necessary before returning.Upon successful connection, return 0.Upon unsuccessful connection, return RC_FAIL or'd with an appropriateRCE_XXX value from dialer.h.lwrite() is used to write to the DCE.lread() and lread_ignore() are used to read from the DCE.  Read timeoutsfrom calling lread() will result automatically in the proper errortermination of the program.  Read timeouts from calling lread_ignore()return -1; you handle the execption here.Any necessary coding of phone numbers, switch settings or otherconfiguration necessary for this function to succeed should bedocumented at the top of the module.--------------------------------------------------------------------------*/intDCE_dial(telno_str)char *telno_str;{char cmd[128];char phone[50];int timeout;int result;char *cptr;char *dialout_default = "ATS0=0S7=40S2=43Q0V1E0X3\r";#define MDVALID	 "0123456789NnSs*#,!/()-"int itmp;int maxretry = 4;	translate("=,-,",telno_str);	if(strspn(telno_str,MDVALID) != strlen(telno_str))	{		DEBUG(1,"phone number has invalid characters\n",0);		return(RC_FAIL | RCE_PHNO);	}	if(decode_phone_number(telno_str,phone,sizeof(phone)))	{		DEBUG(1,"phone number too long\n",0);		return(RC_FAIL | RCE_PHNO);	}	/*	 * wake up modem	 */	DEBUG(6,"--> waking up modem\n",0);	for(itmp = 0; itmp < maxretry; itmp++)	{		lwrite(dialout_default);		if(lread(5) == rOk)			break;	}	if(itmp == maxretry)	{		DEBUG(1,"DIAL INIT FAILED\n",0);		myexit(RC_FAIL | RCE_TIMOUT);	}	/*	 * calculate a timeout for the connect	 * allow a minimum of 40 seconds	 * if long distance (North American calculation here)	 * make it 132 (S7 is calculated as timeout * .9)	 */	timeout = 40;	if((phone[0] == '1') && (phone[0] != '0'))		timeout = 132;	if((timeout < 90) && (dialer_codes['V' - 'A'] || dialer_codes['P' - 'A']))		timeout = 90;	for(cptr = phone; cptr = strchr(cptr,','); cptr++)		timeout += 2;	/* add extra time for pause characters */	DEBUG(6,"wait for connect = %d seconds\n",timeout);/* indicate non-root should not see DTE->DCE traffic */	secure = 1;/* * build and issue the actual dialing command * if root, let him see number, otherwise just say "remote system" */	DEBUG(1,"--> dialing %s\n", (!ecu_calling & uid)		? "remote system" : telno_str);#ifdef WHT	if(!strncmp(*gargv,"ECU",3))		dialer_codes['S' - 'A'] = 1;#endif	sprintf(cmd,"ATM%dS7=%dDT%s\r",		((dialer_codes['S' - 'A']) && !(dialer_codes['N' - 'A'])) ? 1 : 0,		(timeout * 9) / 10,		phone);	/* cmd string can only be 40 characters including "AT" */	if(strlen(cmd) > 40)	{		DEBUG(1,"phone number string too long\n",0);		cleanup(RC_FAIL | RCE_PHNO);	}	lwrite(cmd);/* indicate non-root can see DTE->DCE traffic */	secure = 0;/* wait for connect */	result = lread(timeout);	if(!(result & rfConnect))	{		switch(result & rfMASK)		{		case rNoCarrier:			return(RC_FAIL | RCE_NOCARR);		case rNoDialTone:			return(RC_FAIL | RCE_NOTONE);		case rBusy:			return(RC_FAIL | RCE_BUSY);		case rNoAnswer:			return(RC_FAIL | RCE_ANSWER);		case rError:		default:			return(RC_FAIL | RCE_NULL);		}	}/* indicate non-root can see DTE->DCE traffic */	secure = 0;	return(0);		/* succeeded */}	/* end of DCE_dial *//***********************************************************  You probably do not need to modify the code below here ***********************************************************//*+-------------------------------------------------------------------------	DCE_abort(sig) - dial attempt aborted sig =  0 if non-signal abort (read timeout, most likely)     != 0 if non-SIGALRM signal caught extern int dialing set  1 if dialing request was active,                    else 0 if hangup request was activeThis is a chance for the DCE-specific code to do anything itneeds to cl,ean up after a failure.  Note that if a dialingcall fails, it is the responsibility of the higher-levelprogram calling the dialer to call it again with a hangup request, sothis function is usually a no-op.--------------------------------------------------------------------------*/voidDCE_abort(sig)int sig;{	DEBUG(10,"DCE_abort(%d);\n",sig);}	/* end of DCE_abort *//*+-------------------------------------------------------------------------	DCE_exit(exitcode) - "last chance for gas" in this incarnationThe independent portion of the dialer program calls this routine inlieu of exit() in every case except one (see DCE_argv_hook() below).Normally, this function just passes it's argument to exit(), butany necessary post-processing can be done.  The function must,however, eventually call exit(exitcode);--------------------------------------------------------------------------*/voidDCE_exit(exitcode)int exitcode;{	DEBUG(10,"DCE_exit(%d);\n",exitcode);	exit(exitcode);}	/* end of DCE_exit *//*+-------------------------------------------------------------------------	DCE_argv_hook(argc,argv,optind,unrecognized_switches)This hook gives DCE-specific code a chance to look over the entirecommand line, such as for -z Telebit processing.argc andf argv are the same values passed to main(),optind is the value of optind at the end of normal getopt processing.unrecognized_switches is the count of switches not handled by main().Specifically, -h and -x are standard switches.Normally, this function should just return RC_FAIL|RCE_ARGS if there areany unrecognized switches, otherwise zero.  If you keep your nose cleanthough, you can do anything you need to do here and exit the program.Note: only simple switches (with no argument) may be used with thisfacility if the functrion is to return,' since main()'s getopt() willstop processing switches if it runs into an unrecognized switch with anargument.If the function returns a non-zero value, then the value will be passedDIRECTLY to exit() with no further ado.  Thus, a non-zero value must beof the format expected by dialer program callers, with RC_FAIL set as aminimum.--------------------------------------------------------------------------*/intDCE_argv_hook(argc,argv,optind,unrecognized_switches)int argc;char **argv;int optind;int unrecognized_switches;{	if(unrecognized_switches)		return(RC_FAIL | RCE_ARGS);	return(0);}	/* end of DCE_argv_hook *//* vi: set tabstop=4 shiftwidth=4: */