1 /* $NetBSD: biz22.c,v 1.13 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[] = "@(#)biz22.c 8.1 (Berkeley) 6/6/93"; 36 #endif 37 __RCSID("$NetBSD: biz22.c,v 1.13 2006/12/14 17:09:43 christos Exp $"); 38 #endif /* not lint */ 39 40 #include "tip.h" 41 42 #define DISCONNECT_CMD "\20\04" /* disconnection string */ 43 44 static int btimeout = 0; 45 static jmp_buf timeoutbuf; 46 47 static int biz_dialer(char *, const char *); 48 static int cmd(const char *); 49 static int detect(const char *); 50 static void sigALRM(int); 51 52 /* 53 * Dial up on a BIZCOMP Model 1022 with either 54 * tone dialing (mod = "V") 55 * pulse dialing (mod = "W") 56 */ 57 static int 58 biz_dialer(char *num, const char *mod) 59 { 60 int connected = 0; 61 char cbuf[40]; 62 63 if (boolean(value(VERBOSE))) 64 (void)printf("\nstarting call..."); 65 /* 66 * Disable auto-answer and configure for tone/pulse 67 * dialing 68 */ 69 if (cmd("\02K\r")) { 70 (void)printf("can't initialize bizcomp..."); 71 return (0); 72 } 73 (void)strncpy(cbuf, "\02.\r", sizeof(cbuf) - 1); 74 cbuf[1] = *mod; 75 if (cmd(cbuf)) { 76 (void)printf("can't set dialing mode..."); 77 return (0); 78 } 79 (void)snprintf(cbuf, sizeof cbuf, "\02D%s\r", num); 80 (void)write(FD, cbuf, strlen(cbuf)); 81 if (!detect("7\r")) { 82 (void)printf("can't get dial tone..."); 83 return (0); 84 } 85 if (boolean(value(VERBOSE))) 86 (void)printf("ringing..."); 87 /* 88 * The reply from the BIZCOMP should be: 89 * 2 \r or 7 \r failure 90 * 1 \r success 91 */ 92 connected = detect("1\r"); 93 if (btimeout) 94 biz22_disconnect(); /* insurance */ 95 return (connected); 96 } 97 98 int 99 /*ARGSUSED*/ 100 biz22w_dialer(char *num, char *acu __unused) 101 { 102 103 return (biz_dialer(num, "W")); 104 } 105 106 int 107 /*ARGSUSED*/ 108 biz22f_dialer(char *num, char *acu __unused) 109 { 110 111 return (biz_dialer(num, "V")); 112 } 113 114 void 115 biz22_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 biz22_abort(void) 125 { 126 127 (void)write(FD, "\02", 1); 128 } 129 130 static void 131 /*ARGSUSED*/ 132 sigALRM(int dummy __unused) 133 { 134 135 btimeout = 1; 136 longjmp(timeoutbuf, 1); 137 } 138 139 static int 140 cmd(const char *s) 141 { 142 sig_t f; 143 char c; 144 145 (void)write(FD, s, strlen(s)); 146 f = signal(SIGALRM, sigALRM); 147 if (setjmp(timeoutbuf)) { 148 biz22_abort(); 149 (void)signal(SIGALRM, f); 150 return (1); 151 } 152 (void)alarm((unsigned)number(value(DIALTIMEOUT))); 153 (void)read(FD, &c, 1); 154 (void)alarm(0); 155 (void)signal(SIGALRM, f); 156 c &= 0177; 157 return (c != '\r'); 158 } 159 160 static int 161 detect(const char * volatile s) 162 { 163 sig_t f; 164 char c; 165 166 f = signal(SIGALRM, sigALRM); 167 btimeout = 0; 168 while (*s) { 169 if (setjmp(timeoutbuf)) { 170 biz22_abort(); 171 break; 172 } 173 (void)alarm((unsigned)number(value(DIALTIMEOUT))); 174 (void)read(FD, &c, 1); 175 (void)alarm(0); 176 c &= 0177; 177 if (c != *s++) 178 return (0); 179 } 180 (void)signal(SIGALRM, f); 181 return (btimeout == 0); 182 } 183