ventel.c revision 1.11
1 /* $NetBSD: ventel.c,v 1.11 2004/04/23 22:11:44 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)ventel.c 8.1 (Berkeley) 6/6/93"; 36 #endif 37 __RCSID("$NetBSD: ventel.c,v 1.11 2004/04/23 22:11:44 christos Exp $"); 38 #endif /* not lint */ 39 40 /* 41 * Routines for calling up on a Ventel Modem 42 * The Ventel is expected to be strapped for local echo (just like uucp) 43 */ 44 #include "tip.h" 45 46 #define MAXRETRY 5 47 48 static int timeout = 0; 49 static jmp_buf timeoutbuf; 50 51 static void echo __P((const char *)); 52 static int gobble __P((char, char *)); 53 static void sigALRM __P((int)); 54 static int vensync __P((int)); 55 56 /* 57 * some sleep calls have been replaced by usleep(DELAYUS) 58 * because some ventel modems require two <cr>s in less than 59 * a second in order to 'wake up' 60 */ 61 #define DELAYUS 100000 /* delay in microseconds */ 62 63 int 64 ven_dialer(num, acu) 65 char *num; 66 char *acu; 67 { 68 char *cp; 69 int connected = 0; 70 char *msg, line[80]; 71 struct termios cntrl; 72 73 /* 74 * Get in synch with a couple of carriage returns 75 */ 76 if (!vensync(FD)) { 77 printf("can't synchronize with ventel\n"); 78 #ifdef ACULOG 79 logent(value(HOST), num, "ventel", "can't synch up"); 80 #endif 81 return (0); 82 } 83 if (boolean(value(VERBOSE))) 84 printf("\ndialing..."); 85 fflush(stdout); 86 tcgetattr(FD, &cntrl); 87 cntrl.c_cflag |= HUPCL; 88 tcsetattr(FD, TCSANOW, &cntrl); 89 echo("#k$\r$\n$D$I$A$L$:$ "); 90 for (cp = num; *cp; cp++) { 91 usleep(DELAYUS); 92 write(FD, cp, 1); 93 } 94 usleep(DELAYUS); 95 write(FD, "\r", 1); 96 gobble('\n', line); 97 if (gobble('\n', line)) 98 connected = gobble('!', line); 99 tcflush(FD, TCIOFLUSH); 100 #ifdef ACULOG 101 if (timeout) { 102 (void)snprintf(line, sizeof line, "%d second dial timeout", 103 (int)number(value(DIALTIMEOUT))); 104 logent(value(HOST), num, "ventel", line); 105 } 106 #endif 107 if (timeout) 108 ven_disconnect(); /* insurance */ 109 if (connected || timeout || !boolean(value(VERBOSE))) 110 return (connected); 111 /* call failed, parse response for user */ 112 cp = strchr(line, '\r'); 113 if (cp) 114 *cp = '\0'; 115 for (cp = line; (cp = strchr(cp, ' ')) != NULL; cp++) 116 if (cp[1] == ' ') 117 break; 118 if (cp) { 119 while (*cp == ' ') 120 cp++; 121 msg = cp; 122 while (*cp) { 123 if (isupper((unsigned char)*cp)) 124 *cp = tolower(*cp); 125 cp++; 126 } 127 printf("%s...", msg); 128 } 129 return (connected); 130 } 131 132 void 133 ven_disconnect() 134 { 135 136 close(FD); 137 } 138 139 void 140 ven_abort() 141 { 142 143 write(FD, "\03", 1); 144 close(FD); 145 } 146 147 static void 148 echo(s) 149 const char *s; 150 { 151 char c; 152 153 while ((c = *s++) != 0) switch (c) { 154 155 case '$': 156 read(FD, &c, 1); 157 s++; 158 break; 159 160 case '#': 161 c = *s++; 162 write(FD, &c, 1); 163 break; 164 165 default: 166 write(FD, &c, 1); 167 read(FD, &c, 1); 168 } 169 } 170 171 static void 172 sigALRM(dummy) 173 int dummy; 174 { 175 176 printf("\07timeout waiting for reply\n"); 177 timeout = 1; 178 longjmp(timeoutbuf, 1); 179 } 180 181 static int 182 gobble(match, response) 183 char match; 184 char response[]; 185 { 186 char *cp = response; 187 sig_t f; 188 char c; 189 190 #if __GNUC__ /* XXX pacify gcc */ 191 (void)&cp; 192 #endif 193 194 f = signal(SIGALRM, sigALRM); 195 timeout = 0; 196 do { 197 if (setjmp(timeoutbuf)) { 198 signal(SIGALRM, f); 199 *cp = '\0'; 200 return (0); 201 } 202 alarm(number(value(DIALTIMEOUT))); 203 read(FD, cp, 1); 204 alarm(0); 205 c = (*cp++ &= 0177); 206 #ifdef notdef 207 if (boolean(value(VERBOSE))) 208 putchar(c); 209 #endif 210 } while (c != '\n' && c != match); 211 signal(SIGALRM, SIG_DFL); 212 *cp = '\0'; 213 return (c == match); 214 } 215 216 #define min(a,b) ((a)>(b)?(b):(a)) 217 /* 218 * This convoluted piece of code attempts to get 219 * the ventel in sync. If you don't have FIONREAD 220 * there are gory ways to simulate this. 221 */ 222 static int 223 vensync(fd) 224 int fd; 225 { 226 int already = 0, nread; 227 char buf[60]; 228 229 /* 230 * Toggle DTR to force anyone off that might have left 231 * the modem connected, and insure a consistent state 232 * to start from. 233 * 234 * If you don't have the ioctl calls to diddle directly 235 * with DTR, you can always try setting the baud rate to 0. 236 */ 237 ioctl(FD, TIOCCDTR, 0); 238 sleep(1); 239 ioctl(FD, TIOCSDTR, 0); 240 while (already < MAXRETRY) { 241 /* 242 * After reseting the modem, send it two \r's to 243 * autobaud on. Make sure to delay between them 244 * so the modem can frame the incoming characters. 245 */ 246 write(fd, "\r", 1); 247 usleep(DELAYUS); 248 write(fd, "\r", 1); 249 sleep(2); 250 if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) { 251 perror("tip: ioctl"); 252 continue; 253 } 254 while (nread > 0) { 255 read(fd, buf, min(nread, sizeof buf)); 256 if ((buf[min(nread, sizeof buf) - 1] & 0177) == '$') 257 return (1); 258 nread -= min(nread, 60); 259 } 260 sleep(1); 261 already++; 262 } 263 return (0); 264 } 265
Indexes created Tue Sep 30 11:09:46 GMT 2025