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 static char sccsid[] = "@(#)ventel.c 8.1 (Berkeley) 6/6/93"; 36 #endif /* not lint */ 37 38 /* 39 * Routines for calling up on a Ventel Modem 40 * The Ventel is expected to be strapped for local echo (just like uucp) 41 */ 42 #include "tipconf.h" 43 #include "tip.h" 44 45 #define MAXRETRY 5 46 47 static void sigALRM(); 48 static int timeout = 0; 49 static jmp_buf timeoutbuf; 50 51 /* 52 * some sleep calls have been replaced by this macro 53 * because some ventel modems require two <cr>s in less than 54 * a second in order to 'wake up'... yes, it is dirty... 55 */ 56 #define delay(num,denom) busyloop(CPUSPEED*num/denom) 57 #define CPUSPEED 1000000 /* VAX 780 is 1MIPS */ 58 #define DELAY(n) { register long N = (n); while (--N > 0); } 59 busyloop(n) { DELAY(n); } 60 61 ven_dialer(num, acu) 62 register char *num; 63 char *acu; 64 { 65 register char *cp; 66 register int connected = 0; 67 char *msg, *index(), line[80]; 68 static int gobble(), vensync(); 69 static void echo(); 70 71 /* 72 * Get in synch with a couple of carriage returns 73 */ 74 if (!vensync(FD)) { 75 printf("can't synchronize with ventel\n"); 76 #if ACULOG 77 logent(value(HOST), num, "ventel", "can't synch up"); 78 #endif 79 return (0); 80 } 81 if (boolean(value(VERBOSE))) 82 printf("\ndialing..."); 83 fflush(stdout); 84 acu_hupcl (); 85 echo("#k$\r$\n$D$I$A$L$:$ "); 86 for (cp = num; *cp; cp++) { 87 delay(1, 10); 88 write(FD, cp, 1); 89 } 90 delay(1, 10); 91 write(FD, "\r", 1); 92 gobble('\n', line); 93 if (gobble('\n', line)) 94 connected = gobble('!', line); 95 acu_flush (); 96 #if ACULOG 97 if (timeout) { 98 sprintf(line, "%d second dial timeout", 99 number(value(DIALTIMEOUT))); 100 logent(value(HOST), num, "ventel", line); 101 } 102 #endif 103 if (timeout) 104 ven_disconnect(); /* insurance */ 105 if (connected || timeout || !boolean(value(VERBOSE))) 106 return (connected); 107 /* call failed, parse response for user */ 108 cp = index(line, '\r'); 109 if (cp) 110 *cp = '\0'; 111 for (cp = line; cp = index(cp, ' '); cp++) 112 if (cp[1] == ' ') 113 break; 114 if (cp) { 115 while (*cp == ' ') 116 cp++; 117 msg = cp; 118 while (*cp) { 119 if (isupper(*cp)) 120 *cp = tolower(*cp); 121 cp++; 122 } 123 printf("%s...", msg); 124 } 125 return (connected); 126 } 127 128 ven_disconnect() 129 { 130 131 close(FD); 132 } 133 134 ven_abort() 135 { 136 137 write(FD, "\03", 1); 138 close(FD); 139 } 140 141 static void 142 echo(s) 143 register char *s; 144 { 145 char c; 146 147 while (c = *s++) switch (c) { 148 149 case '$': 150 read(FD, &c, 1); 151 s++; 152 break; 153 154 case '#': 155 c = *s++; 156 write(FD, &c, 1); 157 break; 158 159 default: 160 write(FD, &c, 1); 161 read(FD, &c, 1); 162 } 163 } 164 165 static void 166 sigALRM() 167 { 168 printf("\07timeout waiting for reply\n"); 169 timeout = 1; 170 longjmp(timeoutbuf, 1); 171 } 172 173 static int 174 gobble(match, response) 175 register char match; 176 char response[]; 177 { 178 register char *cp = response; 179 sig_t f; 180 char c; 181 182 f = signal(SIGALRM, sigALRM); 183 timeout = 0; 184 do { 185 if (setjmp(timeoutbuf)) { 186 signal(SIGALRM, f); 187 *cp = '\0'; 188 return (0); 189 } 190 alarm(number(value(DIALTIMEOUT))); 191 read(FD, cp, 1); 192 alarm(0); 193 c = (*cp++ &= 0177); 194 #ifdef notdef 195 if (boolean(value(VERBOSE))) 196 putchar(c); 197 #endif 198 } while (c != '\n' && c != match); 199 signal(SIGALRM, SIG_DFL); 200 *cp = '\0'; 201 return (c == match); 202 } 203 204 #define min(a,b) ((a)>(b)?(b):(a)) 205 /* 206 * This convoluted piece of code attempts to get 207 * the ventel in sync. If you don't have FIONREAD 208 * there are gory ways to simulate this. 209 */ 210 static int 211 vensync(fd) 212 { 213 int already = 0, nread; 214 char buf[60]; 215 216 /* 217 * Toggle DTR to force anyone off that might have left 218 * the modem connected, and insure a consistent state 219 * to start from. 220 * 221 * If you don't have the ioctl calls to diddle directly 222 * with DTR, you can always try setting the baud rate to 0. 223 */ 224 ioctl(FD, TIOCCDTR, 0); 225 sleep(1); 226 ioctl(FD, TIOCSDTR, 0); 227 while (already < MAXRETRY) { 228 /* 229 * After reseting the modem, send it two \r's to 230 * autobaud on. Make sure to delay between them 231 * so the modem can frame the incoming characters. 232 */ 233 write(fd, "\r", 1); 234 delay(1,10); 235 write(fd, "\r", 1); 236 sleep(2); 237 if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) { 238 perror("tip: ioctl"); 239 continue; 240 } 241 while (nread > 0) { 242 read(fd, buf, min(nread, 60)); 243 if ((buf[nread - 1] & 0177) == '$') 244 return (1); 245 nread -= min(nread, 60); 246 } 247 sleep(1); 248 already++; 249 } 250 return (0); 251 } 252 253