1 /* $NetBSD: biz31.c,v 1.12 2006/12/14 17:09:43 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[] = "@(#)biz31.c 8.1 (Berkeley) 6/6/93"; 36 #endif 37 __RCSID("$NetBSD: biz31.c,v 1.12 2006/12/14 17:09:43 christos Exp $"); 38 #endif /* not lint */ 39 40 #include "tip.h" 41 42 #define MAXRETRY 3 /* sync up retry count */ 43 #define DISCONNECT_CMD "\21\25\11\24" /* disconnection string */ 44 45 static void sigALRM(int); 46 static int timeout = 0; 47 static jmp_buf timeoutbuf; 48 49 static void echo(const char *); 50 static int detect(const char *); 51 static void flush(const char *); 52 static int bizsync(int); 53 54 /* 55 * Dial up on a BIZCOMP Model 1031 with either 56 * tone dialing (mod = "f") 57 * pulse dialing (mod = "w") 58 */ 59 static int 60 biz_dialer(char *num, const char *mod) 61 { 62 int connected = 0; 63 64 if (!bizsync(FD)) { 65 logent(value(HOST), "", "biz", "out of sync"); 66 (void)printf("bizcomp out of sync\n"); 67 exit(0); 68 } 69 if (boolean(value(VERBOSE))) 70 (void)printf("\nstarting call..."); 71 echo("#\rk$\r$\n"); /* disable auto-answer */ 72 echo("$>$.$ #\r"); /* tone/pulse dialing */ 73 echo(mod); 74 echo("$\r$\n"); 75 echo("$>$.$ #\re$ "); /* disconnection sequence */ 76 echo(DISCONNECT_CMD); 77 echo("\r$\n$\r$\n"); 78 echo("$>$.$ #\rr$ "); /* repeat dial */ 79 echo(num); 80 echo("\r$\n"); 81 if (boolean(value(VERBOSE))) 82 (void)printf("ringing..."); 83 /* 84 * The reply from the BIZCOMP should be: 85 * `^G NO CONNECTION\r\n^G\r\n' failure 86 * ` CONNECTION\r\n^G' success 87 */ 88 connected = detect(" "); 89 if (!connected) 90 flush(" NO CONNECTION\r\n\07\r\n"); 91 else 92 flush("CONNECTION\r\n\07"); 93 if (timeout) 94 biz31_disconnect(); /* insurance */ 95 return (connected); 96 } 97 98 int 99 /*ARGSUSED*/ 100 biz31w_dialer(char *num, char *acu __unused) 101 { 102 103 return (biz_dialer(num, "w")); 104 } 105 106 int 107 /*ARGSUSED*/ 108 biz31f_dialer(char *num, char *acu __unused) 109 { 110 111 return (biz_dialer(num, "f")); 112 } 113 114 void 115 biz31_disconnect(void) 116 { 117 118 (void)write(FD, DISCONNECT_CMD, 4); 119 (void)sleep(2); 120 (void)tcflush(FD, TCIOFLUSH); 121 } 122 123 void 124 biz31_abort(void) 125 { 126 127 (void)write(FD, "\33", 1); 128 } 129 130 static void 131 echo(const char *s) 132 { 133 char c; 134 135 while ((c = *s++) != '\0') 136 switch (c) { 137 case '$': 138 (void)read(FD, &c, 1); 139 s++; 140 break; 141 142 case '#': 143 c = *s++; 144 (void)write(FD, &c, 1); 145 break; 146 147 default: 148 (void)write(FD, &c, 1); 149 (void)read(FD, &c, 1); 150 } 151 } 152 153 static void 154 /*ARGSUSED*/ 155 sigALRM(int signo __unused) 156 { 157 158 timeout = 1; 159 longjmp(timeoutbuf, 1); 160 } 161 162 static int 163 detect(const char *s) 164 { 165 sig_t f; 166 char c; 167 168 f = signal(SIGALRM, sigALRM); 169 timeout = 0; 170 while (*s) { 171 if (setjmp(timeoutbuf)) { 172 (void)printf("\07timeout waiting for reply\n"); 173 biz31_abort(); 174 break; 175 } 176 (void)alarm((unsigned)number(value(DIALTIMEOUT))); 177 (void)read(FD, &c, 1); 178 (void)alarm(0); 179 if (c != *s++) 180 break; 181 } 182 (void)signal(SIGALRM, f); 183 return (timeout == 0); 184 } 185 186 static void 187 flush(const char *s) 188 { 189 sig_t f; 190 char c; 191 192 f = signal(SIGALRM, sigALRM); 193 while (*s++) { 194 if (setjmp(timeoutbuf)) 195 break; 196 (void)alarm(10); 197 (void)read(FD, &c, 1); 198 (void)alarm(0); 199 } 200 (void)signal(SIGALRM, f); 201 timeout = 0; /* guard against disconnection */ 202 } 203 204 /* 205 * This convoluted piece of code attempts to get 206 * the bizcomp in sync. If you don't have the capacity or nread 207 * call there are gory ways to simulate this. 208 */ 209 static int 210 bizsync(int fd) 211 { 212 #ifdef FIOCAPACITY 213 struct capacity b; 214 # define chars(b) ((b).cp_nbytes) 215 # define IOCTL FIOCAPACITY 216 #endif 217 #ifdef FIONREAD 218 long b; 219 # define chars(b) (b) 220 # define IOCTL FIONREAD 221 #endif 222 int already = 0; 223 char buf[10]; 224 225 retry: 226 if (ioctl(fd, IOCTL, &b) >= 0 && chars(b) > 0) 227 (void)tcflush(FD, TCIOFLUSH); 228 (void)write(fd, "\rp>\r", 4); 229 (void)sleep(1); 230 if (ioctl(fd, IOCTL, &b) >= 0) { 231 if (chars(b) != 10) { 232 nono: 233 if (already > MAXRETRY) 234 return (0); 235 (void)write(fd, DISCONNECT_CMD, 4); 236 (void)sleep(2); 237 already++; 238 goto retry; 239 } else { 240 (void)read(fd, buf, 10); 241 if (strncmp(buf, "p >\r\n\r\n>", 8)) 242 goto nono; 243 } 244 } 245 return (1); 246 } 247