ventel.c revision 1.6
1 /* $NetBSD: ventel.c,v 1.6 1997/02/11 09:24:21 mrg 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 1.6 1997/02/11 09:24:21 mrg Exp $"; 41 #endif /* not lint */ 42 43 /* 44 * Routines for calling up on a Ventel Modem 45 * The Ventel is expected to be strapped for local echo (just like uucp) 46 */ 47 #include "tip.h" 48 #include <termios.h> 49 #include <sys/ioctl.h> 50 51 #define MAXRETRY 5 52 53 static void sigALRM(); 54 static int timeout = 0; 55 static jmp_buf timeoutbuf; 56 57 static int gobble(), vensync(); 58 static void echo(); 59 60 /* 61 * some sleep calls have been replaced by this macro 62 * because some ventel modems require two <cr>s in less than 63 * a second in order to 'wake up'... yes, it is dirty... 64 */ 65 #define delay(num,denom) busyloop(CPUSPEED*num/denom) 66 #define CPUSPEED 1000000 /* VAX 780 is 1MIPS */ 67 #define DELAY(n) { register long N = (n); while (--N > 0); } 68 busyloop(n) { DELAY(n); } 69 70 ven_dialer(num, acu) 71 register char *num; 72 char *acu; 73 { 74 register char *cp; 75 register int connected = 0; 76 char *msg, *index(), line[80]; 77 struct termios cntrl; 78 79 /* 80 * Get in synch with a couple of carriage returns 81 */ 82 if (!vensync(FD)) { 83 printf("can't synchronize with ventel\n"); 84 #ifdef ACULOG 85 logent(value(HOST), num, "ventel", "can't synch up"); 86 #endif 87 return (0); 88 } 89 if (boolean(value(VERBOSE))) 90 printf("\ndialing..."); 91 fflush(stdout); 92 tcgetattr(FD, &cntrl); 93 cntrl.c_cflag |= HUPCL; 94 tcsetattr(FD, TCSANOW, &cntrl); 95 echo("#k$\r$\n$D$I$A$L$:$ "); 96 for (cp = num; *cp; cp++) { 97 delay(1, 10); 98 write(FD, cp, 1); 99 } 100 delay(1, 10); 101 write(FD, "\r", 1); 102 gobble('\n', line); 103 if (gobble('\n', line)) 104 connected = gobble('!', line); 105 tcflush(FD, TCIOFLUSH); 106 #ifdef ACULOG 107 if (timeout) { 108 (void)snprintf(line, sizeof line, "%d second dial timeout", 109 number(value(DIALTIMEOUT))); 110 logent(value(HOST), num, "ventel", line); 111 } 112 #endif 113 if (timeout) 114 ven_disconnect(); /* insurance */ 115 if (connected || timeout || !boolean(value(VERBOSE))) 116 return (connected); 117 /* call failed, parse response for user */ 118 cp = index(line, '\r'); 119 if (cp) 120 *cp = '\0'; 121 for (cp = line; cp = index(cp, ' '); cp++) 122 if (cp[1] == ' ') 123 break; 124 if (cp) { 125 while (*cp == ' ') 126 cp++; 127 msg = cp; 128 while (*cp) { 129 if (isupper(*cp)) 130 *cp = tolower(*cp); 131 cp++; 132 } 133 printf("%s...", msg); 134 } 135 return (connected); 136 } 137 138 ven_disconnect() 139 { 140 141 close(FD); 142 } 143 144 ven_abort() 145 { 146 147 write(FD, "\03", 1); 148 close(FD); 149 } 150 151 static void 152 echo(s) 153 register char *s; 154 { 155 char c; 156 157 while (c = *s++) switch (c) { 158 159 case '$': 160 read(FD, &c, 1); 161 s++; 162 break; 163 164 case '#': 165 c = *s++; 166 write(FD, &c, 1); 167 break; 168 169 default: 170 write(FD, &c, 1); 171 read(FD, &c, 1); 172 } 173 } 174 175 static void 176 sigALRM() 177 { 178 printf("\07timeout waiting for reply\n"); 179 timeout = 1; 180 longjmp(timeoutbuf, 1); 181 } 182 183 static int 184 gobble(match, response) 185 register char match; 186 char response[]; 187 { 188 register char *cp = response; 189 sig_t f; 190 char c; 191 192 f = signal(SIGALRM, sigALRM); 193 timeout = 0; 194 do { 195 if (setjmp(timeoutbuf)) { 196 signal(SIGALRM, f); 197 *cp = '\0'; 198 return (0); 199 } 200 alarm(number(value(DIALTIMEOUT))); 201 read(FD, cp, 1); 202 alarm(0); 203 c = (*cp++ &= 0177); 204 #ifdef notdef 205 if (boolean(value(VERBOSE))) 206 putchar(c); 207 #endif 208 } while (c != '\n' && c != match); 209 signal(SIGALRM, SIG_DFL); 210 *cp = '\0'; 211 return (c == match); 212 } 213 214 #define min(a,b) ((a)>(b)?(b):(a)) 215 /* 216 * This convoluted piece of code attempts to get 217 * the ventel in sync. If you don't have FIONREAD 218 * there are gory ways to simulate this. 219 */ 220 static int 221 vensync(fd) 222 { 223 int already = 0, nread; 224 char buf[60]; 225 226 /* 227 * Toggle DTR to force anyone off that might have left 228 * the modem connected, and insure a consistent state 229 * to start from. 230 * 231 * If you don't have the ioctl calls to diddle directly 232 * with DTR, you can always try setting the baud rate to 0. 233 */ 234 ioctl(FD, TIOCCDTR, 0); 235 sleep(1); 236 ioctl(FD, TIOCSDTR, 0); 237 while (already < MAXRETRY) { 238 /* 239 * After reseting the modem, send it two \r's to 240 * autobaud on. Make sure to delay between them 241 * so the modem can frame the incoming characters. 242 */ 243 write(fd, "\r", 1); 244 delay(1,10); 245 write(fd, "\r", 1); 246 sleep(2); 247 if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) { 248 perror("tip: ioctl"); 249 continue; 250 } 251 while (nread > 0) { 252 read(fd, buf, min(nread, 60)); 253 if ((buf[nread - 1] & 0177) == '$') 254 return (1); 255 nread -= min(nread, 60); 256 } 257 sleep(1); 258 already++; 259 } 260 return (0); 261 } 262 263
Indexes created Tue Sep 30 17:09:57 GMT 2025