1 /* $OpenBSD: ventel.c,v 1.7 2001/11/19 19:02:16 mpech Exp $ */ 2 /* $NetBSD: ventel.c,v 1.6 1997/02/11 09:24:21 mrg Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)ventel.c 8.1 (Berkeley) 6/6/93"; 43 static char rcsid[] = "$OpenBSD: ventel.c,v 1.7 2001/11/19 19:02:16 mpech Exp $"; 44 #endif 45 #endif /* not lint */ 46 47 /* 48 * Routines for calling up on a Ventel Modem 49 * The Ventel is expected to be strapped for local echo (just like uucp) 50 */ 51 #include "tip.h" 52 #include <termios.h> 53 #include <sys/ioctl.h> 54 55 #define MAXRETRY 5 56 57 static void sigALRM(); 58 static int timeout = 0; 59 static jmp_buf timeoutbuf; 60 61 static int gobble(), vensync(); 62 static void echo(); 63 64 /* 65 * some sleep calls have been replaced by this macro 66 * because some ventel modems require two <cr>s in less than 67 * a second in order to 'wake up'... yes, it is dirty... 68 */ 69 #define delay(num,denom) busyloop(CPUSPEED*num/denom) 70 #define CPUSPEED 1000000 /* VAX 780 is 1MIPS */ 71 #define DELAY(n) do { long N = (n); while (--N > 0); } while (0) 72 #define busyloop(n) do { DELAY(n); } while (0) 73 74 int 75 ven_dialer(num, acu) 76 char *num; 77 char *acu; 78 { 79 char *cp; 80 int connected = 0; 81 char *msg, line[80]; 82 struct termios cntrl; 83 84 /* 85 * Get in synch with a couple of carriage returns 86 */ 87 if (!vensync(FD)) { 88 printf("can't synchronize with ventel\n"); 89 #ifdef ACULOG 90 logent(value(HOST), num, "ventel", "can't synch up"); 91 #endif 92 return (0); 93 } 94 if (boolean(value(VERBOSE))) 95 printf("\ndialing..."); 96 fflush(stdout); 97 tcgetattr(FD, &cntrl); 98 cntrl.c_cflag |= HUPCL; 99 tcsetattr(FD, TCSANOW, &cntrl); 100 echo("#k$\r$\n$D$I$A$L$:$ "); 101 for (cp = num; *cp; cp++) { 102 delay(1, 10); 103 write(FD, cp, 1); 104 } 105 delay(1, 10); 106 write(FD, "\r", 1); 107 gobble('\n', line); 108 if (gobble('\n', line)) 109 connected = gobble('!', line); 110 tcflush(FD, TCIOFLUSH); 111 #ifdef ACULOG 112 if (timeout) { 113 (void)sprintf(line, "%ld second dial timeout", 114 number(value(DIALTIMEOUT))); 115 logent(value(HOST), num, "ventel", line); 116 } 117 #endif 118 if (timeout) 119 ven_disconnect(); /* insurance */ 120 if (connected || timeout || !boolean(value(VERBOSE))) 121 return (connected); 122 /* call failed, parse response for user */ 123 cp = strchr(line, '\r'); 124 if (cp) 125 *cp = '\0'; 126 for (cp = line; cp = strchr(cp, ' '); cp++) 127 if (cp[1] == ' ') 128 break; 129 if (cp) { 130 while (*cp == ' ') 131 cp++; 132 msg = cp; 133 while (*cp) { 134 if (isupper(*cp)) 135 *cp = tolower(*cp); 136 cp++; 137 } 138 printf("%s...", msg); 139 } 140 return (connected); 141 } 142 143 void 144 ven_disconnect() 145 { 146 147 close(FD); 148 } 149 150 void 151 ven_abort() 152 { 153 154 write(FD, "\03", 1); 155 close(FD); 156 } 157 158 static void 159 echo(s) 160 char *s; 161 { 162 char c; 163 164 while (c = *s++) switch (c) { 165 166 case '$': 167 read(FD, &c, 1); 168 s++; 169 break; 170 171 case '#': 172 c = *s++; 173 write(FD, &c, 1); 174 break; 175 176 default: 177 write(FD, &c, 1); 178 read(FD, &c, 1); 179 } 180 } 181 182 static void 183 sigALRM() 184 { 185 printf("\07timeout waiting for reply\n"); 186 timeout = 1; 187 longjmp(timeoutbuf, 1); 188 } 189 190 static int 191 gobble(match, response) 192 char match; 193 char response[]; 194 { 195 char *cp = response; 196 sig_t f; 197 char c; 198 199 f = signal(SIGALRM, sigALRM); 200 timeout = 0; 201 do { 202 if (setjmp(timeoutbuf)) { 203 signal(SIGALRM, f); 204 *cp = '\0'; 205 return (0); 206 } 207 alarm(number(value(DIALTIMEOUT))); 208 read(FD, cp, 1); 209 alarm(0); 210 c = (*cp++ &= 0177); 211 #ifdef notdef 212 if (boolean(value(VERBOSE))) 213 putchar(c); 214 #endif 215 } while (c != '\n' && c != match); 216 signal(SIGALRM, SIG_DFL); 217 *cp = '\0'; 218 return (c == match); 219 } 220 221 #define min(a,b) ((a)>(b)?(b):(a)) 222 /* 223 * This convoluted piece of code attempts to get 224 * the ventel in sync. If you don't have FIONREAD 225 * there are gory ways to simulate this. 226 */ 227 static int 228 vensync(fd) 229 { 230 int already = 0, nread; 231 char buf[60]; 232 233 /* 234 * Toggle DTR to force anyone off that might have left 235 * the modem connected, and insure a consistent state 236 * to start from. 237 * 238 * If you don't have the ioctl calls to diddle directly 239 * with DTR, you can always try setting the baud rate to 0. 240 */ 241 ioctl(FD, TIOCCDTR, 0); 242 sleep(1); 243 ioctl(FD, TIOCSDTR, 0); 244 while (already < MAXRETRY) { 245 /* 246 * After reseting the modem, send it two \r's to 247 * autobaud on. Make sure to delay between them 248 * so the modem can frame the incoming characters. 249 */ 250 write(fd, "\r", 1); 251 delay(1,10); 252 write(fd, "\r", 1); 253 sleep(2); 254 if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) { 255 perror("tip: ioctl"); 256 continue; 257 } 258 while (nread > 0) { 259 read(fd, buf, min(nread, 60)); 260 if ((buf[nread - 1] & 0177) == '$') 261 return (1); 262 nread -= min(nread, 60); 263 } 264 sleep(1); 265 already++; 266 } 267 return (0); 268 } 269 270