ventel.c revision 1.4
1 /* $NetBSD: ventel.c,v 1.4 1995/10/29 00:50:04 pk 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 1.4 1995/10/29 00:50:04 pk Exp $"; 41 #endif /* not lint */ 42 43 /* 44 * Routines for calling up on a Ventel Modem 45 * The Ventel is expected to be strapped for local echo (just like uucp) 46 */ 47 #include "tip.h" 48 #include <termios.h> 49 #include <sys/ioctl.h> 50 51 #define MAXRETRY 5 52 53 static void sigALRM(); 54 static int timeout = 0; 55 static jmp_buf timeoutbuf; 56 57 /* 58 * some sleep calls have been replaced by this macro 59 * because some ventel modems require two <cr>s in less than 60 * a second in order to 'wake up'... yes, it is dirty... 61 */ 62 #define delay(num,denom) busyloop(CPUSPEED*num/denom) 63 #define CPUSPEED 1000000 /* VAX 780 is 1MIPS */ 64 #define DELAY(n) { register long N = (n); while (--N > 0); } 65 busyloop(n) { DELAY(n); } 66 67 ven_dialer(num, acu) 68 register char *num; 69 char *acu; 70 { 71 register char *cp; 72 register int connected = 0; 73 char *msg, *index(), line[80]; 74 static int gobble(), vensync(); 75 static void echo(); 76 struct termios cntrl; 77 78 /* 79 * Get in synch with a couple of carriage returns 80 */ 81 if (!vensync(FD)) { 82 printf("can't synchronize with ventel\n"); 83 #ifdef ACULOG 84 logent(value(HOST), num, "ventel", "can't synch up"); 85 #endif 86 return (0); 87 } 88 if (boolean(value(VERBOSE))) 89 printf("\ndialing..."); 90 fflush(stdout); 91 tcgetattr(FD, &cntrl); 92 cntrl.c_cflag |= HUPCL; 93 tcsetattr(FD, TCSANOW, &cntrl); 94 echo("#k$\r$\n$D$I$A$L$:$ "); 95 for (cp = num; *cp; cp++) { 96 delay(1, 10); 97 write(FD, cp, 1); 98 } 99 delay(1, 10); 100 write(FD, "\r", 1); 101 gobble('\n', line); 102 if (gobble('\n', line)) 103 connected = gobble('!', line); 104 tcflush(FD, TCIOFLUSH); 105 #ifdef ACULOG 106 if (timeout) { 107 sprintf(line, "%d second dial timeout", 108 number(value(DIALTIMEOUT))); 109 logent(value(HOST), num, "ventel", line); 110 } 111 #endif 112 if (timeout) 113 ven_disconnect(); /* insurance */ 114 if (connected || timeout || !boolean(value(VERBOSE))) 115 return (connected); 116 /* call failed, parse response for user */ 117 cp = index(line, '\r'); 118 if (cp) 119 *cp = '\0'; 120 for (cp = line; cp = index(cp, ' '); cp++) 121 if (cp[1] == ' ') 122 break; 123 if (cp) { 124 while (*cp == ' ') 125 cp++; 126 msg = cp; 127 while (*cp) { 128 if (isupper(*cp)) 129 *cp = tolower(*cp); 130 cp++; 131 } 132 printf("%s...", msg); 133 } 134 return (connected); 135 } 136 137 ven_disconnect() 138 { 139 140 close(FD); 141 } 142 143 ven_abort() 144 { 145 146 write(FD, "\03", 1); 147 close(FD); 148 } 149 150 static void 151 echo(s) 152 register char *s; 153 { 154 char c; 155 156 while (c = *s++) switch (c) { 157 158 case '$': 159 read(FD, &c, 1); 160 s++; 161 break; 162 163 case '#': 164 c = *s++; 165 write(FD, &c, 1); 166 break; 167 168 default: 169 write(FD, &c, 1); 170 read(FD, &c, 1); 171 } 172 } 173 174 static void 175 sigALRM() 176 { 177 printf("\07timeout waiting for reply\n"); 178 timeout = 1; 179 longjmp(timeoutbuf, 1); 180 } 181 182 static int 183 gobble(match, response) 184 register char match; 185 char response[]; 186 { 187 register char *cp = response; 188 sig_t f; 189 char c; 190 191 f = signal(SIGALRM, sigALRM); 192 timeout = 0; 193 do { 194 if (setjmp(timeoutbuf)) { 195 signal(SIGALRM, f); 196 *cp = '\0'; 197 return (0); 198 } 199 alarm(number(value(DIALTIMEOUT))); 200 read(FD, cp, 1); 201 alarm(0); 202 c = (*cp++ &= 0177); 203 #ifdef notdef 204 if (boolean(value(VERBOSE))) 205 putchar(c); 206 #endif 207 } while (c != '\n' && c != match); 208 signal(SIGALRM, SIG_DFL); 209 *cp = '\0'; 210 return (c == match); 211 } 212 213 #define min(a,b) ((a)>(b)?(b):(a)) 214 /* 215 * This convoluted piece of code attempts to get 216 * the ventel in sync. If you don't have FIONREAD 217 * there are gory ways to simulate this. 218 */ 219 static int 220 vensync(fd) 221 { 222 int already = 0, nread; 223 char buf[60]; 224 225 /* 226 * Toggle DTR to force anyone off that might have left 227 * the modem connected, and insure a consistent state 228 * to start from. 229 * 230 * If you don't have the ioctl calls to diddle directly 231 * with DTR, you can always try setting the baud rate to 0. 232 */ 233 ioctl(FD, TIOCCDTR, 0); 234 sleep(1); 235 ioctl(FD, TIOCSDTR, 0); 236 while (already < MAXRETRY) { 237 /* 238 * After reseting the modem, send it two \r's to 239 * autobaud on. Make sure to delay between them 240 * so the modem can frame the incoming characters. 241 */ 242 write(fd, "\r", 1); 243 delay(1,10); 244 write(fd, "\r", 1); 245 sleep(2); 246 if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) { 247 perror("tip: ioctl"); 248 continue; 249 } 250 while (nread > 0) { 251 read(fd, buf, min(nread, 60)); 252 if ((buf[nread - 1] & 0177) == '$') 253 return (1); 254 nread -= min(nread, 60); 255 } 256 sleep(1); 257 already++; 258 } 259 return (0); 260 } 261 262
Indexes created Mon Sep 29 21:09:56 GMT 2025