1 /* $NetBSD: biz31.c,v 1.11 2006/04/03 02:25:27 perry 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 1.11 2006/04/03 02:25:27 perry Exp $"); 38 #endif /* not lint */ 39 40 #include "tip.h" 41 42 #define MAXRETRY 3 /* sync up retry count */ 43 #define DISCONNECT_CMD "\21\25\11\24" /* disconnection string */ 44 45 static void sigALRM(); 46 static int timeout = 0; 47 static jmp_buf timeoutbuf; 48 49 /* 50 * Dial up on a BIZCOMP Model 1031 with either 51 * tone dialing (mod = "f") 52 * pulse dialing (mod = "w") 53 */ 54 static int 55 biz_dialer(char *num, char *mod) 56 { 57 int connected = 0; 58 59 if (!bizsync(FD)) { 60 logent(value(HOST), "", "biz", "out of sync"); 61 printf("bizcomp out of sync\n"); 62 exit(0); 63 } 64 if (boolean(value(VERBOSE))) 65 printf("\nstarting call..."); 66 echo("#\rk$\r$\n"); /* disable auto-answer */ 67 echo("$>$.$ #\r"); /* tone/pulse dialing */ 68 echo(mod); 69 echo("$\r$\n"); 70 echo("$>$.$ #\re$ "); /* disconnection sequence */ 71 echo(DISCONNECT_CMD); 72 echo("\r$\n$\r$\n"); 73 echo("$>$.$ #\rr$ "); /* repeat dial */ 74 echo(num); 75 echo("\r$\n"); 76 if (boolean(value(VERBOSE))) 77 printf("ringing..."); 78 /* 79 * The reply from the BIZCOMP should be: 80 * `^G NO CONNECTION\r\n^G\r\n' failure 81 * ` CONNECTION\r\n^G' success 82 */ 83 connected = detect(" "); 84 if (!connected) 85 flush(" NO CONNECTION\r\n\07\r\n"); 86 else 87 flush("CONNECTION\r\n\07"); 88 if (timeout) 89 biz31_disconnect(); /* insurance */ 90 return (connected); 91 } 92 93 biz31w_dialer(char *num, char *acu) 94 { 95 96 return (biz_dialer(num, "w")); 97 } 98 99 biz31f_dialer(char *num, char *acu) 100 { 101 102 return (biz_dialer(num, "f")); 103 } 104 105 biz31_disconnect(void) 106 { 107 108 write(FD, DISCONNECT_CMD, 4); 109 sleep(2); 110 tcflush(FD, TCIOFLUSH); 111 } 112 113 biz31_abort(void) 114 { 115 116 write(FD, "\33", 1); 117 } 118 119 static int 120 echo(char *s) 121 { 122 char c; 123 124 while (c = *s++) switch (c) { 125 case '$': 126 read(FD, &c, 1); 127 s++; 128 break; 129 130 case '#': 131 c = *s++; 132 write(FD, &c, 1); 133 break; 134 135 default: 136 write(FD, &c, 1); 137 read(FD, &c, 1); 138 } 139 } 140 141 static void 142 sigALRM(void) 143 { 144 145 timeout = 1; 146 longjmp(timeoutbuf, 1); 147 } 148 149 static int 150 detect(char *s) 151 { 152 sig_t f; 153 char c; 154 155 f = signal(SIGALRM, sigALRM); 156 timeout = 0; 157 while (*s) { 158 if (setjmp(timeoutbuf)) { 159 printf("\07timeout waiting for reply\n"); 160 biz31_abort(); 161 break; 162 } 163 alarm(number(value(DIALTIMEOUT))); 164 read(FD, &c, 1); 165 alarm(0); 166 if (c != *s++) 167 break; 168 } 169 signal(SIGALRM, f); 170 return (timeout == 0); 171 } 172 173 static int 174 flush(char *s) 175 { 176 sig_t f; 177 char c; 178 179 f = signal(SIGALRM, sigALRM); 180 while (*s++) { 181 if (setjmp(timeoutbuf)) 182 break; 183 alarm(10); 184 read(FD, &c, 1); 185 alarm(0); 186 } 187 signal(SIGALRM, f); 188 timeout = 0; /* guard against disconnection */ 189 } 190 191 /* 192 * This convoluted piece of code attempts to get 193 * the bizcomp in sync. If you don't have the capacity or nread 194 * call there are gory ways to simulate this. 195 */ 196 static int 197 bizsync(int fd) 198 { 199 #ifdef FIOCAPACITY 200 struct capacity b; 201 # define chars(b) ((b).cp_nbytes) 202 # define IOCTL FIOCAPACITY 203 #endif 204 #ifdef FIONREAD 205 long b; 206 # define chars(b) (b) 207 # define IOCTL FIONREAD 208 #endif 209 int already = 0; 210 char buf[10]; 211 212 retry: 213 if (ioctl(fd, IOCTL, (caddr_t)&b) >= 0 && chars(b) > 0) 214 tcflush(FD, TCIOFLUSH); 215 write(fd, "\rp>\r", 4); 216 sleep(1); 217 if (ioctl(fd, IOCTL, (caddr_t)&b) >= 0) { 218 if (chars(b) != 10) { 219 nono: 220 if (already > MAXRETRY) 221 return (0); 222 write(fd, DISCONNECT_CMD, 4); 223 sleep(2); 224 already++; 225 goto retry; 226 } else { 227 read(fd, buf, 10); 228 if (strncmp(buf, "p >\r\n\r\n>", 8)) 229 goto nono; 230 } 231 } 232 return (1); 233 } 234