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Annotation of 43BSDReno/usr.bin/tip/aculib/ventel.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)ventel.c   5.3 (Berkeley) 6/1/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: /*
        !            25:  * Routines for calling up on a Ventel Modem
        !            26:  * The Ventel is expected to be strapped for local echo (just like uucp)
        !            27:  */
        !            28: #include "tip.h"
        !            29: 
        !            30: #define        MAXRETRY        5
        !            31: 
        !            32: static int sigALRM();
        !            33: static int timeout = 0;
        !            34: static jmp_buf timeoutbuf;
        !            35: 
        !            36: /*
        !            37:  * some sleep calls have been replaced by this macro
        !            38:  * because some ventel modems require two <cr>s in less than
        !            39:  * a second in order to 'wake up'... yes, it is dirty...
        !            40:  */
        !            41: #define delay(num,denom) busyloop(CPUSPEED*num/denom)
        !            42: #define CPUSPEED 1000000       /* VAX 780 is 1MIPS */
        !            43: #define        DELAY(n)        { register long N = (n); while (--N > 0); }
        !            44: busyloop(n) { DELAY(n); }
        !            45: 
        !            46: ven_dialer(num, acu)
        !            47:        register char *num;
        !            48:        char *acu;
        !            49: {
        !            50:        register char *cp;
        !            51:        register int connected = 0;
        !            52:        char *msg, *index(), line[80];
        !            53: 
        !            54:        /*
        !            55:         * Get in synch with a couple of carriage returns
        !            56:         */
        !            57:        if (!vensync(FD)) {
        !            58:                printf("can't synchronize with ventel\n");
        !            59: #ifdef ACULOG
        !            60:                logent(value(HOST), num, "ventel", "can't synch up");
        !            61: #endif
        !            62:                return (0);
        !            63:        }
        !            64:        if (boolean(value(VERBOSE)))
        !            65:                printf("\ndialing...");
        !            66:        fflush(stdout);
        !            67:        ioctl(FD, TIOCHPCL, 0);
        !            68:        echo("#k$\r$\n$D$I$A$L$:$ ");
        !            69:        for (cp = num; *cp; cp++) {
        !            70:                delay(1, 10);
        !            71:                write(FD, cp, 1);
        !            72:        }
        !            73:        delay(1, 10);
        !            74:        write(FD, "\r", 1);
        !            75:        gobble('\n', line);
        !            76:        if (gobble('\n', line))
        !            77:                connected = gobble('!', line);
        !            78:        ioctl(FD, TIOCFLUSH);
        !            79: #ifdef ACULOG
        !            80:        if (timeout) {
        !            81:                sprintf(line, "%d second dial timeout",
        !            82:                        number(value(DIALTIMEOUT)));
        !            83:                logent(value(HOST), num, "ventel", line);
        !            84:        }
        !            85: #endif
        !            86:        if (timeout)
        !            87:                ven_disconnect();       /* insurance */
        !            88:        if (connected || timeout || !boolean(value(VERBOSE)))
        !            89:                return (connected);
        !            90:        /* call failed, parse response for user */
        !            91:        cp = index(line, '\r');
        !            92:        if (cp)
        !            93:                *cp = '\0';
        !            94:        for (cp = line; cp = index(cp, ' '); cp++)
        !            95:                if (cp[1] == ' ')
        !            96:                        break;
        !            97:        if (cp) {
        !            98:                while (*cp == ' ')
        !            99:                        cp++;
        !           100:                msg = cp;
        !           101:                while (*cp) {
        !           102:                        if (isupper(*cp))
        !           103:                                *cp = tolower(*cp);
        !           104:                        cp++;
        !           105:                }
        !           106:                printf("%s...", msg);
        !           107:        }
        !           108:        return (connected);
        !           109: }
        !           110: 
        !           111: ven_disconnect()
        !           112: {
        !           113: 
        !           114:        close(FD);
        !           115: }
        !           116: 
        !           117: ven_abort()
        !           118: {
        !           119: 
        !           120:        write(FD, "\03", 1);
        !           121:        close(FD);
        !           122: }
        !           123: 
        !           124: static int
        !           125: echo(s)
        !           126:        register char *s;
        !           127: {
        !           128:        char c;
        !           129: 
        !           130:        while (c = *s++) switch (c) {
        !           131: 
        !           132:        case '$':
        !           133:                read(FD, &c, 1);
        !           134:                s++;
        !           135:                break;
        !           136: 
        !           137:        case '#':
        !           138:                c = *s++;
        !           139:                write(FD, &c, 1);
        !           140:                break;
        !           141: 
        !           142:        default:
        !           143:                write(FD, &c, 1);
        !           144:                read(FD, &c, 1);
        !           145:        }
        !           146: }
        !           147: 
        !           148: static int
        !           149: sigALRM()
        !           150: {
        !           151: 
        !           152:        printf("\07timeout waiting for reply\n");
        !           153:        timeout = 1;
        !           154:        longjmp(timeoutbuf, 1);
        !           155: }
        !           156: 
        !           157: static int
        !           158: gobble(match, response)
        !           159:        register char match;
        !           160:        char response[];
        !           161: {
        !           162:        register char *cp = response;
        !           163:        char c;
        !           164:        int (*f)();
        !           165: 
        !           166:        signal(SIGALRM, sigALRM);
        !           167:        timeout = 0;
        !           168:        do {
        !           169:                if (setjmp(timeoutbuf)) {
        !           170:                        signal(SIGALRM, f);
        !           171:                        *cp = '\0';
        !           172:                        return (0);
        !           173:                }
        !           174:                alarm(number(value(DIALTIMEOUT)));
        !           175:                read(FD, cp, 1);
        !           176:                alarm(0);
        !           177:                c = (*cp++ &= 0177);
        !           178: #ifdef notdef
        !           179:                if (boolean(value(VERBOSE)))
        !           180:                        putchar(c);
        !           181: #endif
        !           182:        } while (c != '\n' && c != match);
        !           183:        signal(SIGALRM, SIG_DFL);
        !           184:        *cp = '\0';
        !           185:        return (c == match);
        !           186: }
        !           187: 
        !           188: #define min(a,b)       ((a)>(b)?(b):(a))
        !           189: /*
        !           190:  * This convoluted piece of code attempts to get
        !           191:  * the ventel in sync.  If you don't have FIONREAD
        !           192:  * there are gory ways to simulate this.
        !           193:  */
        !           194: static int
        !           195: vensync(fd)
        !           196: {
        !           197:        int already = 0, nread;
        !           198:        char buf[60];
        !           199: 
        !           200:        /*
        !           201:         * Toggle DTR to force anyone off that might have left
        !           202:         * the modem connected, and insure a consistent state
        !           203:         * to start from.
        !           204:         *
        !           205:         * If you don't have the ioctl calls to diddle directly
        !           206:         * with DTR, you can always try setting the baud rate to 0.
        !           207:         */
        !           208:        ioctl(FD, TIOCCDTR, 0);
        !           209:        sleep(1);
        !           210:        ioctl(FD, TIOCSDTR, 0);
        !           211:        while (already < MAXRETRY) {
        !           212:                /*
        !           213:                 * After reseting the modem, send it two \r's to
        !           214:                 * autobaud on. Make sure to delay between them
        !           215:                 * so the modem can frame the incoming characters.
        !           216:                 */
        !           217:                write(fd, "\r", 1);
        !           218:                delay(1,10);
        !           219:                write(fd, "\r", 1);
        !           220:                sleep(2);
        !           221:                if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) {
        !           222:                        perror("tip: ioctl");
        !           223:                        continue;
        !           224:                }
        !           225:                while (nread > 0) {
        !           226:                        read(fd, buf, min(nread, 60));
        !           227:                        if ((buf[nread - 1] & 0177) == '$')
        !           228:                                return (1);
        !           229:                        nread -= min(nread, 60);
        !           230:                }
        !           231:                sleep(1);
        !           232:                already++;
        !           233:        }
        !           234:        return (0);
        !           235: }
        !           236: 

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