1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)ventel.c 8.1 (Berkeley) 6/6/93"; 37 #endif 38 static const char rcsid[] = 39 "$Id$"; 40 #endif /* not lint */ 41 42 /* 43 * Routines for calling up on a Ventel Modem 44 * The Ventel is expected to be strapped for local echo (just like uucp) 45 */ 46 #include "tipconf.h" 47 #include "tip.h" 48 #include <err.h> 49 50 #define MAXRETRY 5 51 52 static void sigALRM(); 53 static int timeout = 0; 54 static jmp_buf timeoutbuf; 55 56 /* 57 * some sleep calls have been replaced by this macro 58 * because some ventel modems require two <cr>s in less than 59 * a second in order to 'wake up'... yes, it is dirty... 60 */ 61 #define delay(num,denom) busyloop(CPUSPEED*num/denom) 62 #define CPUSPEED 1000000 /* VAX 780 is 1MIPS */ 63 #define DELAY(n) { register long N = (n); while (--N > 0); } 64 busyloop(n) { DELAY(n); } 65 66 ven_dialer(num, acu) 67 register char *num; 68 char *acu; 69 { 70 register char *cp; 71 register int connected = 0; 72 char *msg, *index(), line[80]; 73 static int gobble(), vensync(); 74 static void echo(); 75 76 /* 77 * Get in synch with a couple of carriage returns 78 */ 79 if (!vensync(FD)) { 80 printf("can't synchronize with ventel\n"); 81 #if ACULOG 82 logent(value(HOST), num, "ventel", "can't synch up"); 83 #endif 84 return (0); 85 } 86 if (boolean(value(VERBOSE))) 87 printf("\ndialing..."); 88 fflush(stdout); 89 acu_hupcl (); 90 echo("#k$\r$\n$D$I$A$L$:$ "); 91 for (cp = num; *cp; cp++) { 92 delay(1, 10); 93 write(FD, cp, 1); 94 } 95 delay(1, 10); 96 write(FD, "\r", 1); 97 gobble('\n', line); 98 if (gobble('\n', line)) 99 connected = gobble('!', line); 100 acu_flush (); 101 #if ACULOG 102 if (timeout) { 103 sprintf(line, "%d second dial timeout", 104 number(value(DIALTIMEOUT))); 105 logent(value(HOST), num, "ventel", line); 106 } 107 #endif 108 if (timeout) 109 ven_disconnect(); /* insurance */ 110 if (connected || timeout || !boolean(value(VERBOSE))) 111 return (connected); 112 /* call failed, parse response for user */ 113 cp = index(line, '\r'); 114 if (cp) 115 *cp = '\0'; 116 for (cp = line; cp = index(cp, ' '); cp++) 117 if (cp[1] == ' ') 118 break; 119 if (cp) { 120 while (*cp == ' ') 121 cp++; 122 msg = cp; 123 while (*cp) { 124 if (isupper(*cp)) 125 *cp = tolower(*cp); 126 cp++; 127 } 128 printf("%s...", msg); 129 } 130 return (connected); 131 } 132 133 ven_disconnect() 134 { 135 136 close(FD); 137 } 138 139 ven_abort() 140 { 141 142 write(FD, "\03", 1); 143 close(FD); 144 } 145 146 static void 147 echo(s) 148 register char *s; 149 { 150 char c; 151 152 while (c = *s++) switch (c) { 153 154 case '$': 155 read(FD, &c, 1); 156 s++; 157 break; 158 159 case '#': 160 c = *s++; 161 write(FD, &c, 1); 162 break; 163 164 default: 165 write(FD, &c, 1); 166 read(FD, &c, 1); 167 } 168 } 169 170 static void 171 sigALRM() 172 { 173 printf("\07timeout waiting for reply\n"); 174 timeout = 1; 175 longjmp(timeoutbuf, 1); 176 } 177 178 static int 179 gobble(match, response) 180 register char match; 181 char response[]; 182 { 183 register char *cp = response; 184 sig_t f; 185 char c; 186 187 f = signal(SIGALRM, sigALRM); 188 timeout = 0; 189 do { 190 if (setjmp(timeoutbuf)) { 191 signal(SIGALRM, f); 192 *cp = '\0'; 193 return (0); 194 } 195 alarm(number(value(DIALTIMEOUT))); 196 read(FD, cp, 1); 197 alarm(0); 198 c = (*cp++ &= 0177); 199 #ifdef notdef 200 if (boolean(value(VERBOSE))) 201 putchar(c); 202 #endif 203 } while (c != '\n' && c != match); 204 signal(SIGALRM, SIG_DFL); 205 *cp = '\0'; 206 return (c == match); 207 } 208 209 #define min(a,b) ((a)>(b)?(b):(a)) 210 /* 211 * This convoluted piece of code attempts to get 212 * the ventel in sync. If you don't have FIONREAD 213 * there are gory ways to simulate this. 214 */ 215 static int 216 vensync(fd) 217 { 218 int already = 0, nread; 219 char buf[60]; 220 221 /* 222 * Toggle DTR to force anyone off that might have left 223 * the modem connected, and insure a consistent state 224 * to start from. 225 * 226 * If you don't have the ioctl calls to diddle directly 227 * with DTR, you can always try setting the baud rate to 0. 228 */ 229 ioctl(FD, TIOCCDTR, 0); 230 sleep(1); 231 ioctl(FD, TIOCSDTR, 0); 232 while (already < MAXRETRY) { 233 /* 234 * After reseting the modem, send it two \r's to 235 * autobaud on. Make sure to delay between them 236 * so the modem can frame the incoming characters. 237 */ 238 write(fd, "\r", 1); 239 delay(1,10); 240 write(fd, "\r", 1); 241 sleep(2); 242 if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) { 243 warn("ioctl"); 244 continue; 245 } 246 while (nread > 0) { 247 read(fd, buf, min(nread, 60)); 248 if ((buf[nread - 1] & 0177) == '$') 249 return (1); 250 nread -= min(nread, 60); 251 } 252 sleep(1); 253 already++; 254 } 255 return (0); 256 } 257 258