1 /* $NetBSD: biz22.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[] = "@(#)biz22.c 8.1 (Berkeley) 6/6/93"; 36 #endif 37 __RCSID("$NetBSD: biz22.c,v 1.11 2006/04/03 02:25:27 perry 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 printf("\nstarting call..."); 65 /* 66 * Disable auto-answer and configure for tone/pulse 67 * dialing 68 */ 69 if (cmd("\02K\r")) { 70 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 printf("can't set dialing mode..."); 77 return (0); 78 } 79 (void)snprintf(cbuf, sizeof cbuf, "\02D%s\r", num); 80 write(FD, cbuf, strlen(cbuf)); 81 if (!detect("7\r")) { 82 printf("can't get dial tone..."); 83 return (0); 84 } 85 if (boolean(value(VERBOSE))) 86 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 biz22w_dialer(char *num, char *acu) 100 { 101 102 return (biz_dialer(num, "W")); 103 } 104 105 int 106 biz22f_dialer(char *num, char *acu) 107 { 108 109 return (biz_dialer(num, "V")); 110 } 111 112 void 113 biz22_disconnect(void) 114 { 115 116 write(FD, DISCONNECT_CMD, 4); 117 sleep(2); 118 tcflush(FD, TCIOFLUSH); 119 } 120 121 void 122 biz22_abort(void) 123 { 124 125 write(FD, "\02", 1); 126 } 127 128 static void 129 sigALRM(int dummy) 130 { 131 132 btimeout = 1; 133 longjmp(timeoutbuf, 1); 134 } 135 136 static int 137 cmd(const char *s) 138 { 139 sig_t f; 140 char c; 141 142 write(FD, s, strlen(s)); 143 f = signal(SIGALRM, sigALRM); 144 if (setjmp(timeoutbuf)) { 145 biz22_abort(); 146 signal(SIGALRM, f); 147 return (1); 148 } 149 alarm(number(value(DIALTIMEOUT))); 150 read(FD, &c, 1); 151 alarm(0); 152 signal(SIGALRM, f); 153 c &= 0177; 154 return (c != '\r'); 155 } 156 157 static int 158 detect(const char *s) 159 { 160 sig_t f; 161 char c; 162 163 #if __GNUC__ /* XXX pacify gcc */ 164 (void)&s; 165 #endif 166 167 f = signal(SIGALRM, sigALRM); 168 btimeout = 0; 169 while (*s) { 170 if (setjmp(timeoutbuf)) { 171 biz22_abort(); 172 break; 173 } 174 alarm(number(value(DIALTIMEOUT))); 175 read(FD, &c, 1); 176 alarm(0); 177 c &= 0177; 178 if (c != *s++) 179 return (0); 180 } 181 signal(SIGALRM, f); 182 return (btimeout == 0); 183 } 184