1 /* $OpenBSD: ventel.c,v 1.12 2006/03/17 19:17:13 moritz Exp $ */ 2 /* $NetBSD: ventel.c,v 1.6 1997/02/11 09:24:21 mrg Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-3-Clause 6 * 7 * Copyright (c) 1983, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)ventel.c 8.1 (Berkeley) 6/6/93"; 41 static const char rcsid[] = "$OpenBSD: ventel.c,v 1.12 2006/03/17 19:17:13 moritz Exp $"; 42 #endif 43 #endif /* not lint */ 44 45 /* 46 * Routines for calling up on a Ventel Modem 47 * The Ventel is expected to be strapped for local echo (just like uucp) 48 */ 49 #include "tip.h" 50 #include <termios.h> 51 #include <sys/ioctl.h> 52 53 #define MAXRETRY 5 54 55 static int dialtimeout = 0; 56 static jmp_buf timeoutbuf; 57 58 static void echo(char *); 59 static void sigALRM(int); 60 static int gobble(char, char *); 61 static int vensync(int); 62 63 /* 64 * some sleep calls have been replaced by this macro 65 * because some ventel modems require two <cr>s in less than 66 * a second in order to 'wake up'... yes, it is dirty... 67 */ 68 #define delay(num,denom) busyloop(CPUSPEED*num/denom) 69 #define CPUSPEED 1000000 /* VAX 780 is 1MIPS */ 70 #define DELAY(n) do { long N = (n); while (--N > 0); } while (0) 71 #define busyloop(n) do { DELAY(n); } while (0) 72 73 int 74 ven_dialer(char *num, char *acu) 75 { 76 char *cp; 77 int connected = 0; 78 char *msg, line[80]; 79 struct termios cntrl; 80 81 /* 82 * Get in synch with a couple of carriage returns 83 */ 84 if (!vensync(FD)) { 85 printf("can't synchronize with ventel\n"); 86 #ifdef ACULOG 87 logent(value(HOST), num, "ventel", "can't synch up"); 88 #endif 89 return (0); 90 } 91 if (boolean(value(VERBOSE))) 92 printf("\ndialing..."); 93 fflush(stdout); 94 tcgetattr(FD, &cntrl); 95 cntrl.c_cflag |= HUPCL; 96 tcsetattr(FD, TCSANOW, &cntrl); 97 echo("#k$\r$\n$D$I$A$L$:$ "); 98 for (cp = num; *cp; cp++) { 99 delay(1, 10); 100 write(FD, cp, 1); 101 } 102 delay(1, 10); 103 write(FD, "\r", 1); 104 gobble('\n', line); 105 if (gobble('\n', line)) 106 connected = gobble('!', line); 107 tcflush(FD, TCIOFLUSH); 108 #ifdef ACULOG 109 if (dialtimeout) { 110 (void)snprintf(line, sizeof line, "%ld second dial timeout", 111 number(value(DIALTIMEOUT))); 112 logent(value(HOST), num, "ventel", line); 113 } 114 #endif 115 if (dialtimeout) 116 ven_disconnect(); /* insurance */ 117 if (connected || dialtimeout || !boolean(value(VERBOSE))) 118 return (connected); 119 /* call failed, parse response for user */ 120 cp = strchr(line, '\r'); 121 if (cp) 122 *cp = '\0'; 123 for (cp = line; (cp = strchr(cp, ' ')) != NULL; cp++) 124 if (cp[1] == ' ') 125 break; 126 if (cp) { 127 while (*cp == ' ') 128 cp++; 129 msg = cp; 130 while (*cp) { 131 if (isupper(*cp)) 132 *cp = tolower(*cp); 133 cp++; 134 } 135 printf("%s...", msg); 136 } 137 return (connected); 138 } 139 140 void 141 ven_disconnect(void) 142 { 143 close(FD); 144 } 145 146 void 147 ven_abort(void) 148 { 149 write(FD, "\03", 1); 150 close(FD); 151 } 152 153 static void 154 echo(char *s) 155 { 156 char c; 157 158 while ((c = *s++) != '\0') 159 switch (c) { 160 case '$': 161 read(FD, &c, 1); 162 s++; 163 break; 164 165 case '#': 166 c = *s++; 167 write(FD, &c, 1); 168 break; 169 170 default: 171 write(FD, &c, 1); 172 read(FD, &c, 1); 173 } 174 } 175 176 /*ARGSUSED*/ 177 static void 178 sigALRM(int signo) 179 { 180 printf("\07timeout waiting for reply\n"); 181 dialtimeout = 1; 182 longjmp(timeoutbuf, 1); 183 } 184 185 static int 186 gobble(char match, char response[]) 187 { 188 char *cp = response; 189 sig_t f; 190 char c; 191 192 f = signal(SIGALRM, sigALRM); 193 dialtimeout = 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(int 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