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 /* 36 * Routines for calling up on a Ventel Modem 37 * The Ventel is expected to be strapped for local echo (just like uucp) 38 */ 39 #include "tip.h" 40 #include <termios.h> 41 #include <sys/ioctl.h> 42 43 #define MAXRETRY 5 44 45 static int dialtimeout = 0; 46 static jmp_buf timeoutbuf; 47 48 static void echo(char *); 49 static void sigALRM(int); 50 static int gobble(char, char *); 51 static int vensync(int); 52 53 /* 54 * some sleep calls have been replaced by this macro 55 * because some ventel modems require two <cr>s in less than 56 * a second in order to 'wake up'... yes, it is dirty... 57 */ 58 #define delay(num,denom) busyloop(CPUSPEED*num/denom) 59 #define CPUSPEED 1000000 /* VAX 780 is 1MIPS */ 60 #define DELAY(n) do { long N = (n); while (--N > 0); } while (0) 61 #define busyloop(n) do { DELAY(n); } while (0) 62 63 int 64 ven_dialer(char *num, char *acu) 65 { 66 char *cp; 67 int connected = 0; 68 char *msg, line[80]; 69 struct termios cntrl; 70 71 /* 72 * Get in synch with a couple of carriage returns 73 */ 74 if (!vensync(FD)) { 75 printf("can't synchronize with ventel\n"); 76 #ifdef ACULOG 77 logent(value(HOST), num, "ventel", "can't synch up"); 78 #endif 79 return (0); 80 } 81 if (boolean(value(VERBOSE))) 82 printf("\ndialing..."); 83 fflush(stdout); 84 tcgetattr(FD, &cntrl); 85 cntrl.c_cflag |= HUPCL; 86 tcsetattr(FD, TCSANOW, &cntrl); 87 echo("#k$\r$\n$D$I$A$L$:$ "); 88 for (cp = num; *cp; cp++) { 89 delay(1, 10); 90 write(FD, cp, 1); 91 } 92 delay(1, 10); 93 write(FD, "\r", 1); 94 gobble('\n', line); 95 if (gobble('\n', line)) 96 connected = gobble('!', line); 97 tcflush(FD, TCIOFLUSH); 98 #ifdef ACULOG 99 if (dialtimeout) { 100 (void)snprintf(line, sizeof line, "%ld second dial timeout", 101 number(value(DIALTIMEOUT))); 102 logent(value(HOST), num, "ventel", line); 103 } 104 #endif 105 if (dialtimeout) 106 ven_disconnect(); /* insurance */ 107 if (connected || dialtimeout || !boolean(value(VERBOSE))) 108 return (connected); 109 /* call failed, parse response for user */ 110 cp = strchr(line, '\r'); 111 if (cp) 112 *cp = '\0'; 113 for (cp = line; (cp = strchr(cp, ' ')) != NULL; cp++) 114 if (cp[1] == ' ') 115 break; 116 if (cp) { 117 while (*cp == ' ') 118 cp++; 119 msg = cp; 120 while (*cp) { 121 if (isupper(*cp)) 122 *cp = tolower(*cp); 123 cp++; 124 } 125 printf("%s...", msg); 126 } 127 return (connected); 128 } 129 130 void 131 ven_disconnect(void) 132 { 133 close(FD); 134 } 135 136 void 137 ven_abort(void) 138 { 139 write(FD, "\03", 1); 140 close(FD); 141 } 142 143 static void 144 echo(char *s) 145 { 146 char c; 147 148 while ((c = *s++) != '\0') 149 switch (c) { 150 case '$': 151 read(FD, &c, 1); 152 s++; 153 break; 154 155 case '#': 156 c = *s++; 157 write(FD, &c, 1); 158 break; 159 160 default: 161 write(FD, &c, 1); 162 read(FD, &c, 1); 163 } 164 } 165 166 /*ARGSUSED*/ 167 static void 168 sigALRM(int signo) 169 { 170 printf("\07timeout waiting for reply\n"); 171 dialtimeout = 1; 172 longjmp(timeoutbuf, 1); 173 } 174 175 static int 176 gobble(char match, char response[]) 177 { 178 char *cp = response; 179 sig_t f; 180 char c; 181 182 f = signal(SIGALRM, sigALRM); 183 dialtimeout = 0; 184 do { 185 if (setjmp(timeoutbuf)) { 186 signal(SIGALRM, f); 187 *cp = '\0'; 188 return (0); 189 } 190 alarm(number(value(DIALTIMEOUT))); 191 read(FD, cp, 1); 192 alarm(0); 193 c = (*cp++ &= 0177); 194 #ifdef notdef 195 if (boolean(value(VERBOSE))) 196 putchar(c); 197 #endif 198 } while (c != '\n' && c != match); 199 signal(SIGALRM, SIG_DFL); 200 *cp = '\0'; 201 return (c == match); 202 } 203 204 #define min(a,b) ((a)>(b)?(b):(a)) 205 /* 206 * This convoluted piece of code attempts to get 207 * the ventel in sync. If you don't have FIONREAD 208 * there are gory ways to simulate this. 209 */ 210 static int 211 vensync(int fd) 212 { 213 int already = 0, nread; 214 char buf[60]; 215 216 /* 217 * Toggle DTR to force anyone off that might have left 218 * the modem connected, and insure a consistent state 219 * to start from. 220 * 221 * If you don't have the ioctl calls to diddle directly 222 * with DTR, you can always try setting the baud rate to 0. 223 */ 224 ioctl(FD, TIOCCDTR, 0); 225 sleep(1); 226 ioctl(FD, TIOCSDTR, 0); 227 while (already < MAXRETRY) { 228 /* 229 * After reseting the modem, send it two \r's to 230 * autobaud on. Make sure to delay between them 231 * so the modem can frame the incoming characters. 232 */ 233 write(fd, "\r", 1); 234 delay(1,10); 235 write(fd, "\r", 1); 236 sleep(2); 237 if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) { 238 perror("tip: ioctl"); 239 continue; 240 } 241 while (nread > 0) { 242 read(fd, buf, min(nread, 60)); 243 if ((buf[nread - 1] & 0177) == '$') 244 return (1); 245 nread -= min(nread, 60); 246 } 247 sleep(1); 248 already++; 249 } 250 return (0); 251 } 252