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 * 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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)ventel.c 8.1 (Berkeley) 6/6/93"; 39 static const char rcsid[] = "$OpenBSD: ventel.c,v 1.12 2006/03/17 19:17:13 moritz Exp $"; 40 #endif 41 #endif /* not lint */ 42 43 /* 44 * Routines for calling up on a Ventel Modem 45 * The Ventel is expected to be strapped for local echo (just like uucp) 46 */ 47 #include "tip.h" 48 #include <termios.h> 49 #include <sys/ioctl.h> 50 51 #define MAXRETRY 5 52 53 static int dialtimeout = 0; 54 static jmp_buf timeoutbuf; 55 56 static void echo(char *); 57 static void sigALRM(int); 58 static int gobble(char, char *); 59 static int vensync(int); 60 61 /* 62 * some sleep calls have been replaced by this macro 63 * because some ventel modems require two <cr>s in less than 64 * a second in order to 'wake up'... yes, it is dirty... 65 */ 66 #define delay(num,denom) busyloop(CPUSPEED*num/denom) 67 #define CPUSPEED 1000000 /* VAX 780 is 1MIPS */ 68 #define DELAY(n) do { long N = (n); while (--N > 0); } while (0) 69 #define busyloop(n) do { DELAY(n); } while (0) 70 71 int 72 ven_dialer(char *num, char *acu) 73 { 74 char *cp; 75 int connected = 0; 76 char *msg, line[80]; 77 struct termios cntrl; 78 79 /* 80 * Get in synch with a couple of carriage returns 81 */ 82 if (!vensync(FD)) { 83 printf("can't synchronize with ventel\n"); 84 #ifdef ACULOG 85 logent(value(HOST), num, "ventel", "can't synch up"); 86 #endif 87 return (0); 88 } 89 if (boolean(value(VERBOSE))) 90 printf("\ndialing..."); 91 fflush(stdout); 92 tcgetattr(FD, &cntrl); 93 cntrl.c_cflag |= HUPCL; 94 tcsetattr(FD, TCSANOW, &cntrl); 95 echo("#k$\r$\n$D$I$A$L$:$ "); 96 for (cp = num; *cp; cp++) { 97 delay(1, 10); 98 write(FD, cp, 1); 99 } 100 delay(1, 10); 101 write(FD, "\r", 1); 102 gobble('\n', line); 103 if (gobble('\n', line)) 104 connected = gobble('!', line); 105 tcflush(FD, TCIOFLUSH); 106 #ifdef ACULOG 107 if (dialtimeout) { 108 (void)snprintf(line, sizeof line, "%ld second dial timeout", 109 number(value(DIALTIMEOUT))); 110 logent(value(HOST), num, "ventel", line); 111 } 112 #endif 113 if (dialtimeout) 114 ven_disconnect(); /* insurance */ 115 if (connected || dialtimeout || !boolean(value(VERBOSE))) 116 return (connected); 117 /* call failed, parse response for user */ 118 cp = strchr(line, '\r'); 119 if (cp) 120 *cp = '\0'; 121 for (cp = line; (cp = strchr(cp, ' ')) != NULL; cp++) 122 if (cp[1] == ' ') 123 break; 124 if (cp) { 125 while (*cp == ' ') 126 cp++; 127 msg = cp; 128 while (*cp) { 129 if (isupper(*cp)) 130 *cp = tolower(*cp); 131 cp++; 132 } 133 printf("%s...", msg); 134 } 135 return (connected); 136 } 137 138 void 139 ven_disconnect(void) 140 { 141 close(FD); 142 } 143 144 void 145 ven_abort(void) 146 { 147 write(FD, "\03", 1); 148 close(FD); 149 } 150 151 static void 152 echo(char *s) 153 { 154 char c; 155 156 while ((c = *s++) != '\0') 157 switch (c) { 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 /*ARGSUSED*/ 175 static void 176 sigALRM(int signo) 177 { 178 printf("\07timeout waiting for reply\n"); 179 dialtimeout = 1; 180 longjmp(timeoutbuf, 1); 181 } 182 183 static int 184 gobble(char match, char response[]) 185 { 186 char *cp = response; 187 sig_t f; 188 char c; 189 190 f = signal(SIGALRM, sigALRM); 191 dialtimeout = 0; 192 do { 193 if (setjmp(timeoutbuf)) { 194 signal(SIGALRM, f); 195 *cp = '\0'; 196 return (0); 197 } 198 alarm(number(value(DIALTIMEOUT))); 199 read(FD, cp, 1); 200 alarm(0); 201 c = (*cp++ &= 0177); 202 #ifdef notdef 203 if (boolean(value(VERBOSE))) 204 putchar(c); 205 #endif 206 } while (c != '\n' && c != match); 207 signal(SIGALRM, SIG_DFL); 208 *cp = '\0'; 209 return (c == match); 210 } 211 212 #define min(a,b) ((a)>(b)?(b):(a)) 213 /* 214 * This convoluted piece of code attempts to get 215 * the ventel in sync. If you don't have FIONREAD 216 * there are gory ways to simulate this. 217 */ 218 static int 219 vensync(int fd) 220 { 221 int already = 0, nread; 222 char buf[60]; 223 224 /* 225 * Toggle DTR to force anyone off that might have left 226 * the modem connected, and insure a consistent state 227 * to start from. 228 * 229 * If you don't have the ioctl calls to diddle directly 230 * with DTR, you can always try setting the baud rate to 0. 231 */ 232 ioctl(FD, TIOCCDTR, 0); 233 sleep(1); 234 ioctl(FD, TIOCSDTR, 0); 235 while (already < MAXRETRY) { 236 /* 237 * After reseting the modem, send it two \r's to 238 * autobaud on. Make sure to delay between them 239 * so the modem can frame the incoming characters. 240 */ 241 write(fd, "\r", 1); 242 delay(1,10); 243 write(fd, "\r", 1); 244 sleep(2); 245 if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) { 246 perror("tip: ioctl"); 247 continue; 248 } 249 while (nread > 0) { 250 read(fd, buf, min(nread, 60)); 251 if ((buf[nread - 1] & 0177) == '$') 252 return (1); 253 nread -= min(nread, 60); 254 } 255 sleep(1); 256 already++; 257 } 258 return (0); 259 } 260