1 /* $NetBSD: hayes.c,v 1.4 1995/10/29 00:49:54 pk 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)hayes.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static char rcsid[] = "$NetBSD: hayes.c,v 1.4 1995/10/29 00:49:54 pk Exp $"; 41 #endif /* not lint */ 42 43 /* 44 * Routines for calling up on a Hayes Modem 45 * (based on the old VenTel driver). 46 * The modem is expected to be strapped for "echo". 47 * Also, the switches enabling the DTR and CD lines 48 * must be set correctly. 49 * NOTICE: 50 * The easy way to hang up a modem is always simply to 51 * clear the DTR signal. However, if the +++ sequence 52 * (which switches the modem back to local mode) is sent 53 * before modem is hung up, removal of the DTR signal 54 * has no effect (except that it prevents the modem from 55 * recognizing commands). 56 * (by Helge Skrivervik, Calma Company, Sunnyvale, CA. 1984) 57 */ 58 /* 59 * TODO: 60 * It is probably not a good idea to switch the modem 61 * state between 'verbose' and terse (status messages). 62 * This should be kicked out and we should use verbose 63 * mode only. This would make it consistent with normal 64 * interactive use thru the command 'tip dialer'. 65 */ 66 #include "tip.h" 67 68 #include <termios.h> 69 #include <sys/ioctl.h> 70 71 #define min(a,b) ((a < b) ? a : b) 72 73 static void sigALRM(); 74 static int timeout = 0; 75 static jmp_buf timeoutbuf; 76 static char gobble(); 77 #define DUMBUFLEN 40 78 static char dumbuf[DUMBUFLEN]; 79 80 #define DIALING 1 81 #define IDLE 2 82 #define CONNECTED 3 83 #define FAILED 4 84 static int state = IDLE; 85 86 hay_dialer(num, acu) 87 register char *num; 88 char *acu; 89 { 90 register char *cp; 91 register int connected = 0; 92 char dummy; 93 struct termios cntrl; 94 #ifdef ACULOG 95 char line[80]; 96 #endif 97 if (hay_sync() == 0) /* make sure we can talk to the modem */ 98 return(0); 99 if (boolean(value(VERBOSE))) 100 printf("\ndialing..."); 101 fflush(stdout); 102 tcgetattr(FD, &cntrl); 103 cntrl.c_cflag |= HUPCL; 104 tcsetattr(FD, TCSANOW, &cntrl); 105 tcflush(FD, TCIOFLUSH); 106 write(FD, "ATv0\r", 5); /* tell modem to use short status codes */ 107 gobble("\r"); 108 gobble("\r"); 109 write(FD, "ATTD", 4); /* send dial command */ 110 write(FD, num, strlen(num)); 111 state = DIALING; 112 write(FD, "\r", 1); 113 connected = 0; 114 if (gobble("\r")) { 115 if ((dummy = gobble("01234")) != '1') 116 error_rep(dummy); 117 else 118 connected = 1; 119 } 120 if (connected) 121 state = CONNECTED; 122 else { 123 state = FAILED; 124 return (connected); /* lets get out of here.. */ 125 } 126 tcflush(FD, TCIOFLUSH); 127 #ifdef ACULOG 128 if (timeout) { 129 sprintf(line, "%d second dial timeout", 130 number(value(DIALTIMEOUT))); 131 logent(value(HOST), num, "hayes", line); 132 } 133 #endif 134 if (timeout) 135 hay_disconnect(); /* insurance */ 136 return (connected); 137 } 138 139 140 hay_disconnect() 141 { 142 char c; 143 int len, rlen; 144 145 /* first hang up the modem*/ 146 #ifdef DEBUG 147 printf("\rdisconnecting modem....\n\r"); 148 #endif 149 ioctl(FD, TIOCCDTR, 0); 150 sleep(1); 151 ioctl(FD, TIOCSDTR, 0); 152 goodbye(); 153 } 154 155 hay_abort() 156 { 157 158 char c; 159 160 write(FD, "\r", 1); /* send anything to abort the call */ 161 hay_disconnect(); 162 } 163 164 static void 165 sigALRM() 166 { 167 168 printf("\07timeout waiting for reply\n\r"); 169 timeout = 1; 170 longjmp(timeoutbuf, 1); 171 } 172 173 static char 174 gobble(match) 175 register char *match; 176 { 177 char c; 178 sig_t f; 179 int i, status = 0; 180 181 f = signal(SIGALRM, sigALRM); 182 timeout = 0; 183 #ifdef DEBUG 184 printf("\ngobble: waiting for %s\n", match); 185 #endif 186 do { 187 if (setjmp(timeoutbuf)) { 188 signal(SIGALRM, f); 189 return (0); 190 } 191 alarm(number(value(DIALTIMEOUT))); 192 read(FD, &c, 1); 193 alarm(0); 194 c &= 0177; 195 #ifdef DEBUG 196 printf("%c 0x%x ", c, c); 197 #endif 198 for (i = 0; i < strlen(match); i++) 199 if (c == match[i]) 200 status = c; 201 } while (status == 0); 202 signal(SIGALRM, SIG_DFL); 203 #ifdef DEBUG 204 printf("\n"); 205 #endif 206 return (status); 207 } 208 209 error_rep(c) 210 register char c; 211 { 212 printf("\n\r"); 213 switch (c) { 214 215 case '0': 216 printf("OK"); 217 break; 218 219 case '1': 220 printf("CONNECT"); 221 break; 222 223 case '2': 224 printf("RING"); 225 break; 226 227 case '3': 228 printf("NO CARRIER"); 229 break; 230 231 case '4': 232 printf("ERROR in input"); 233 break; 234 235 case '5': 236 printf("CONNECT 1200"); 237 break; 238 239 default: 240 printf("Unknown Modem error: %c (0x%x)", c, c); 241 } 242 printf("\n\r"); 243 return; 244 } 245 246 /* 247 * set modem back to normal verbose status codes. 248 */ 249 goodbye() 250 { 251 int len, rlen; 252 char c; 253 254 tcflush(FD, TCIOFLUSH); 255 if (hay_sync()) { 256 sleep(1); 257 #ifndef DEBUG 258 tcflush(FD, TCIOFLUSH); 259 #endif 260 write(FD, "ATH0\r", 5); /* insurance */ 261 #ifndef DEBUG 262 c = gobble("03"); 263 if (c != '0' && c != '3') { 264 printf("cannot hang up modem\n\r"); 265 printf("please use 'tip dialer' to make sure the line is hung up\n\r"); 266 } 267 #endif 268 sleep(1); 269 ioctl(FD, FIONREAD, &len); 270 #ifdef DEBUG 271 printf("goodbye1: len=%d -- ", len); 272 rlen = read(FD, dumbuf, min(len, DUMBUFLEN)); 273 dumbuf[rlen] = '\0'; 274 printf("read (%d): %s\r\n", rlen, dumbuf); 275 #endif 276 write(FD, "ATv1\r", 5); 277 sleep(1); 278 #ifdef DEBUG 279 ioctl(FD, FIONREAD, &len); 280 printf("goodbye2: len=%d -- ", len); 281 rlen = read(FD, dumbuf, min(len, DUMBUFLEN)); 282 dumbuf[rlen] = '\0'; 283 printf("read (%d): %s\r\n", rlen, dumbuf); 284 #endif 285 } 286 tcflush(FD, TCIOFLUSH); 287 ioctl(FD, TIOCCDTR, 0); /* clear DTR (insurance) */ 288 close(FD); 289 } 290 291 #define MAXRETRY 5 292 293 hay_sync() 294 { 295 int len, retry = 0; 296 297 while (retry++ <= MAXRETRY) { 298 write(FD, "AT\r", 3); 299 sleep(1); 300 ioctl(FD, FIONREAD, &len); 301 if (len) { 302 len = read(FD, dumbuf, min(len, DUMBUFLEN)); 303 if (index(dumbuf, '0') || 304 (index(dumbuf, 'O') && index(dumbuf, 'K'))) 305 return(1); 306 #ifdef DEBUG 307 dumbuf[len] = '\0'; 308 printf("hay_sync: (\"%s\") %d\n\r", dumbuf, retry); 309 #endif 310 } 311 ioctl(FD, TIOCCDTR, 0); 312 ioctl(FD, TIOCSDTR, 0); 313 } 314 printf("Cannot synchronize with hayes...\n\r"); 315 return(0); 316 } 317