1: #ifndef lint
   2: static char sccsid[] = "@(#)rvmacs.c	4.4 (Berkeley) 6/7/86";
   3: #endif
   4: 
   5: #include "../condevs.h"
   6: #ifdef  RVMACS
   7: 
   8: /*
   9:  * Racal-Vadic 'RV820' MACS system with 831 adaptor.
  10:  * A typical 300 baud L-devices entry is
  11:  *	ACU tty10 tty11,48 300 rvmacs
  12:  * where tty10 is the communication line (D_Line),
  13:  * tty11 is the dialer line (D_calldev),
  14:  * the '4' is the dialer address + modem type (viz. dialer 0, Bell 103),
  15:  * the '8' is the communication port,
  16:  * We assume the dialer speed is 1200 baud unless MULTISPEED is defined.
  17:  * We extended the semantics of the L-devices entry to allow you
  18:  * to set the speed at which the computer talks to the dialer:
  19:  *	ACU cul0 cua0,0<,2400 1200 rvmacs
  20:  * This is interpreted as above, except that the number following the second
  21:  * comma in the third field is taken to be the speed at which the computer
  22:  * must communicate with the dialer.  (If omitted, it defaults to the value
  23:  * in the fourth field.)  Note -- just after the call completes and you get
  24:  * carrier, the line speed is reset to the speed indicated in the fourth field.
  25:  * To get this ability, define "MULTISPEED", as below.
  26:  *
  27:  */
  28: #define MULTISPEED      /* for dialers which work at various speeds */
  29: 
  30: #define STX 02  /* Access Adaptor */
  31: #define ETX 03  /* Transfer to Dialer */
  32: #define SI  017 /* Buffer Empty (end of phone number) */
  33: #define ABORT   01  /* Abort */
  34: 
  35: #define pc(fd, x)   (c = x, write(fd, &c, 1))
  36: 
  37: rvmacsopn(ph, flds, dev)
  38: char *ph, *flds[];
  39: struct Devices *dev;
  40: {
  41:     register int va, i, child;
  42:     register char *p;
  43:     char c, acu[20], com[20];
  44:     int baudrate;
  45:     int timelim;
  46:     int pid, status;
  47:     int zero = 0;
  48: #ifdef MULTISPEED
  49:     char *pp;
  50: #else !MULTISPEED
  51:     struct sgttyb sg;
  52: #endif MULTISPEED
  53: 
  54:     child = -1;
  55:     sprintf(com, "/dev/%s", dev->D_line);
  56:     sprintf(acu, "/dev/%s", dev->D_calldev);
  57:     if ((p = index(acu, ',')) == NULL) {
  58:         DEBUG(2, "No dialer/modem specification\n", 0);
  59:         return CF_DIAL;
  60:     }
  61:     *p++ = '\0';
  62: #ifdef MULTISPEED
  63:     baudrate = dev->D_speed;
  64:     if ((pp = index(p, ',')) != NULL){
  65:         baudrate = atoi(pp+1);
  66:         DEBUG(5, "Using speed %d baud\n", baudrate);
  67:     }
  68: #endif MULTISPEED
  69:     if (setjmp(Sjbuf)) {
  70:         logent("rvmacsopn", "TIMEOUT");
  71:         goto failret;
  72:     }
  73:     DEBUG(4, "STARTING CALL\n", 0);
  74:     getnextfd();
  75:     signal(SIGALRM, alarmtr);
  76:     timelim = 5 * strlen(ph);
  77:     alarm(timelim < 45 ? 45 : timelim);
  78: 
  79:     if ((va = open(acu, 2)) < 0) {
  80:         logent(acu, "CAN'T OPEN");
  81:         alarm(0);
  82:         return CF_DIAL;
  83:     }
  84: 
  85:     /* rti!trt: avoid passing acu file descriptor to children */
  86:     next_fd = -1;
  87:     fioclex(va);
  88: 
  89:     if ((child = fork()) == 0) {
  90:         /* create child to do dialing */
  91:         sleep(2);
  92:         fclose(stdin);
  93:         fclose(stdout);
  94: #ifdef MULTISPEED
  95:         fixline(va, baudrate);
  96: #else !MULTISPEED
  97:         sg.sg_flags = RAW|ANYP;
  98:         sg.sg_ispeed = sg.sg_ospeed = B1200;
  99:         ioctl(va, TIOCSETP, &sg);
 100: #endif MULTISPEED
 101:         pc(va, ABORT);
 102:         sleep(1);
 103:         ioctl(va, TIOCFLUSH, &zero);
 104:         pc(va, STX);    /* access adaptor */
 105:         pc(va, *p++);   /* Send Dialer Address Digit */
 106:         pc(va, *p); /* Send Modem Address Digit */
 107:         while (*ph && *ph != '<') {
 108:             switch (*ph) {
 109:             case '_':
 110:             case '-':
 111:             case '=':
 112:                 pc(va, '=');
 113:                 break;
 114:             default:
 115:                 if (*ph >= '0' && *ph <= '9')
 116:                     pc(va, *ph);
 117:                 break;
 118:             }
 119:             ph++;
 120:         }
 121:         pc(va, '<');    /* Transfer Control to Modem (sigh) */
 122:         pc(va, SI); /* Send Buffer Empty */
 123:         pc(va, ETX);    /* Initiate Call */
 124:         sleep(1);
 125: 
 126:         if (read(va, &c, 1) != 1) {
 127:             close(va);
 128:             logent("ACU READ", _FAILED);
 129:             exit(1);
 130:         }
 131:         if (c == 'B' || c == 'G') {
 132:             char cc;
 133:             pc(va, ABORT);
 134:             read(va, &cc, 1);
 135:         }
 136:         DEBUG(4, "Dialer returned %c\n", c);
 137:         close(va);
 138:         exit(c != 'A');
 139:     }
 140:     /*
 141: 	 * open line - will return on carrier
 142: 	 */
 143:     if ((i = open(com, 2)) < 0) {
 144:         if (errno == EIO)
 145:             logent("carrier", "LOST");
 146:         else
 147:             logent("dialup open", _FAILED);
 148:         goto failret;
 149:     }
 150:     while ((pid = wait(&status)) != child && pid != -1)
 151:         ;
 152:     alarm(0);
 153:     if (status) {
 154:         close(i);
 155:         close(va);      /* XXX */
 156:         return CF_DIAL;
 157:     }
 158:     fixline(i, dev->D_speed);
 159:     return i;
 160: 
 161: failret:
 162:     alarm(0);
 163:     close(va);
 164:     if (child != -1)
 165:         kill(child, SIGKILL);
 166:     return CF_DIAL;
 167: }
 168: 
 169: rvmacscls(fd)
 170: register int fd;
 171: {
 172:     if (fd > 0) {
 173:         char c;
 174: 
 175:         pc(fd, ABORT);
 176:         ioctl(fd, TIOCCDTR, STBNULL);
 177:         sleep(1);
 178:         ioctl(fd, TIOCNXCL, STBNULL);
 179:         close(fd);
 180:         delock(devSel);
 181:     }
 182: }
 183: #endif

Defined functions

rvmacscls defined in line 169; never used
rvmacsopn defined in line 37; never used

Defined variables

sccsid defined in line 2; never used

Defined macros

ABORT defined in line 33; used 3 times
ETX defined in line 31; used 1 times
MULTISPEED defined in line 28; used 5 times
SI defined in line 32; used 1 times
STX defined in line 30; used 1 times
pc defined in line 35; used 11 times
Last modified: 1987-02-17
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