1 /* $NetBSD: ventel.c,v 1.3 1994/12/08 09:31:52 jtc Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)ventel.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static char rcsid[] = "$NetBSD: ventel.c,v 1.3 1994/12/08 09:31:52 jtc Exp $"; 41 #endif /* not lint */ 42 43 /* 44 * Routines for calling up on a Ventel Modem 45 * The Ventel is expected to be strapped for local echo (just like uucp) 46 */ 47 #include "tip.h" 48 49 #define MAXRETRY 5 50 51 static void sigALRM(); 52 static int timeout = 0; 53 static jmp_buf timeoutbuf; 54 55 /* 56 * some sleep calls have been replaced by this macro 57 * because some ventel modems require two <cr>s in less than 58 * a second in order to 'wake up'... yes, it is dirty... 59 */ 60 #define delay(num,denom) busyloop(CPUSPEED*num/denom) 61 #define CPUSPEED 1000000 /* VAX 780 is 1MIPS */ 62 #define DELAY(n) { register long N = (n); while (--N > 0); } 63 busyloop(n) { DELAY(n); } 64 65 ven_dialer(num, acu) 66 register char *num; 67 char *acu; 68 { 69 register char *cp; 70 register int connected = 0; 71 char *msg, *index(), line[80]; 72 static int gobble(), vensync(); 73 static void echo(); 74 75 /* 76 * Get in synch with a couple of carriage returns 77 */ 78 if (!vensync(FD)) { 79 printf("can't synchronize with ventel\n"); 80 #ifdef ACULOG 81 logent(value(HOST), num, "ventel", "can't synch up"); 82 #endif 83 return (0); 84 } 85 if (boolean(value(VERBOSE))) 86 printf("\ndialing..."); 87 fflush(stdout); 88 ioctl(FD, TIOCHPCL, 0); 89 echo("#k$\r$\n$D$I$A$L$:$ "); 90 for (cp = num; *cp; cp++) { 91 delay(1, 10); 92 write(FD, cp, 1); 93 } 94 delay(1, 10); 95 write(FD, "\r", 1); 96 gobble('\n', line); 97 if (gobble('\n', line)) 98 connected = gobble('!', line); 99 ioctl(FD, TIOCFLUSH); 100 #ifdef ACULOG 101 if (timeout) { 102 sprintf(line, "%d second dial timeout", 103 number(value(DIALTIMEOUT))); 104 logent(value(HOST), num, "ventel", line); 105 } 106 #endif 107 if (timeout) 108 ven_disconnect(); /* insurance */ 109 if (connected || timeout || !boolean(value(VERBOSE))) 110 return (connected); 111 /* call failed, parse response for user */ 112 cp = index(line, '\r'); 113 if (cp) 114 *cp = '\0'; 115 for (cp = line; cp = index(cp, ' '); cp++) 116 if (cp[1] == ' ') 117 break; 118 if (cp) { 119 while (*cp == ' ') 120 cp++; 121 msg = cp; 122 while (*cp) { 123 if (isupper(*cp)) 124 *cp = tolower(*cp); 125 cp++; 126 } 127 printf("%s...", msg); 128 } 129 return (connected); 130 } 131 132 ven_disconnect() 133 { 134 135 close(FD); 136 } 137 138 ven_abort() 139 { 140 141 write(FD, "\03", 1); 142 close(FD); 143 } 144 145 static void 146 echo(s) 147 register char *s; 148 { 149 char c; 150 151 while (c = *s++) switch (c) { 152 153 case '$': 154 read(FD, &c, 1); 155 s++; 156 break; 157 158 case '#': 159 c = *s++; 160 write(FD, &c, 1); 161 break; 162 163 default: 164 write(FD, &c, 1); 165 read(FD, &c, 1); 166 } 167 } 168 169 static void 170 sigALRM() 171 { 172 printf("\07timeout waiting for reply\n"); 173 timeout = 1; 174 longjmp(timeoutbuf, 1); 175 } 176 177 static int 178 gobble(match, response) 179 register char match; 180 char response[]; 181 { 182 register char *cp = response; 183 sig_t f; 184 char c; 185 186 f = signal(SIGALRM, sigALRM); 187 timeout = 0; 188 do { 189 if (setjmp(timeoutbuf)) { 190 signal(SIGALRM, f); 191 *cp = '\0'; 192 return (0); 193 } 194 alarm(number(value(DIALTIMEOUT))); 195 read(FD, cp, 1); 196 alarm(0); 197 c = (*cp++ &= 0177); 198 #ifdef notdef 199 if (boolean(value(VERBOSE))) 200 putchar(c); 201 #endif 202 } while (c != '\n' && c != match); 203 signal(SIGALRM, SIG_DFL); 204 *cp = '\0'; 205 return (c == match); 206 } 207 208 #define min(a,b) ((a)>(b)?(b):(a)) 209 /* 210 * This convoluted piece of code attempts to get 211 * the ventel in sync. If you don't have FIONREAD 212 * there are gory ways to simulate this. 213 */ 214 static int 215 vensync(fd) 216 { 217 int already = 0, nread; 218 char buf[60]; 219 220 /* 221 * Toggle DTR to force anyone off that might have left 222 * the modem connected, and insure a consistent state 223 * to start from. 224 * 225 * If you don't have the ioctl calls to diddle directly 226 * with DTR, you can always try setting the baud rate to 0. 227 */ 228 ioctl(FD, TIOCCDTR, 0); 229 sleep(1); 230 ioctl(FD, TIOCSDTR, 0); 231 while (already < MAXRETRY) { 232 /* 233 * After reseting the modem, send it two \r's to 234 * autobaud on. Make sure to delay between them 235 * so the modem can frame the incoming characters. 236 */ 237 write(fd, "\r", 1); 238 delay(1,10); 239 write(fd, "\r", 1); 240 sleep(2); 241 if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) { 242 perror("tip: ioctl"); 243 continue; 244 } 245 while (nread > 0) { 246 read(fd, buf, min(nread, 60)); 247 if ((buf[nread - 1] & 0177) == '$') 248 return (1); 249 nread -= min(nread, 60); 250 } 251 sleep(1); 252 already++; 253 } 254 return (0); 255 } 256 257