1 /* $OpenBSD: biz31.c,v 1.10 2006/03/17 19:17:13 moritz Exp $ */
2 /* $NetBSD: biz31.c,v 1.5 1997/02/11 09:24:14 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 #include "tip.h"
36
37 #define MAXRETRY 3 /* sync up retry count */
38 #define DISCONNECT_CMD "\21\25\11\24" /* disconnection string */
39
40 static int biz_dialer(char *, char *);
41 static int bizsync(int);
42 static int echo(char *);
43 static void sigALRM(int);
44 static int detect(char *);
45 static int flush(char *);
46 static int bizsync(int);
47
48 static int timeout = 0;
49 static jmp_buf timeoutbuf;
50
51 /*
52 * Dial up on a BIZCOMP Model 1031 with either
53 * tone dialing (mod = "f")
54 * pulse dialing (mod = "w")
55 */
56 static int
biz_dialer(char * num,char * mod)57 biz_dialer(char *num, char *mod)
58 {
59 int connected = 0;
60
61 if (!bizsync(FD)) {
62 logent(value(HOST), "", "biz", "out of sync");
63 printf("bizcomp out of sync\n");
64 delock(uucplock);
65 exit(0);
66 }
67 if (boolean(value(VERBOSE)))
68 printf("\nstarting call...");
69 echo("#\rk$\r$\n"); /* disable auto-answer */
70 echo("$>$.$ #\r"); /* tone/pulse dialing */
71 echo(mod);
72 echo("$\r$\n");
73 echo("$>$.$ #\re$ "); /* disconnection sequence */
74 echo(DISCONNECT_CMD);
75 echo("\r$\n$\r$\n");
76 echo("$>$.$ #\rr$ "); /* repeat dial */
77 echo(num);
78 echo("\r$\n");
79 if (boolean(value(VERBOSE)))
80 printf("ringing...");
81 /*
82 * The reply from the BIZCOMP should be:
83 * `^G NO CONNECTION\r\n^G\r\n' failure
84 * ` CONNECTION\r\n^G' success
85 */
86 connected = detect(" ");
87 #ifdef ACULOG
88 if (timeout) {
89 char line[80];
90
91 (void)snprintf(line, sizeof line, "%ld second dial timeout",
92 number(value(DIALTIMEOUT)));
93 logent(value(HOST), num, "biz", line);
94 }
95 #endif
96 if (!connected)
97 flush(" NO CONNECTION\r\n\07\r\n");
98 else
99 flush("CONNECTION\r\n\07");
100 if (timeout)
101 biz31_disconnect(); /* insurance */
102 return (connected);
103 }
104
105 int
biz31w_dialer(char * num,char * acu)106 biz31w_dialer(char *num, char *acu)
107 {
108 return (biz_dialer(num, "w"));
109 }
110
111 int
biz31f_dialer(char * num,char * acu)112 biz31f_dialer(char *num, char *acu)
113 {
114 return (biz_dialer(num, "f"));
115 }
116
117 void
biz31_disconnect(void)118 biz31_disconnect(void)
119 {
120 write(FD, DISCONNECT_CMD, sizeof(DISCONNECT_CMD)-1);
121 sleep(2);
122 tcflush(FD, TCIOFLUSH);
123 }
124
125 void
biz31_abort(void)126 biz31_abort(void)
127 {
128 write(FD, "\33", 1);
129 }
130
131 static int
echo(char * s)132 echo(char *s)
133 {
134 char c;
135
136 while (c = *s++) switch (c) {
137
138 case '$':
139 read(FD, &c, 1);
140 s++;
141 break;
142
143 case '#':
144 c = *s++;
145 write(FD, &c, 1);
146 break;
147
148 default:
149 write(FD, &c, 1);
150 read(FD, &c, 1);
151 }
152 }
153
154 /*ARGSUSED*/
155 static void
sigALRM(int signo)156 sigALRM(int signo)
157 {
158 timeout = 1;
159 longjmp(timeoutbuf, 1);
160 }
161
162 static int
detect(char * s)163 detect(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 printf("\07timeout waiting for reply\n");
173 biz31_abort();
174 break;
175 }
176 alarm(number(value(DIALTIMEOUT)));
177 read(FD, &c, 1);
178 alarm(0);
179 if (c != *s++)
180 break;
181 }
182 signal(SIGALRM, f);
183 return (timeout == 0);
184 }
185
186 static int
flush(char * s)187 flush(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 alarm(10);
197 read(FD, &c, 1);
198 alarm(0);
199 }
200 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
bizsync(int fd)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, (caddr_t)&b) >= 0 && chars(b) > 0)
227 tcflush(FD, TCIOFLUSH);
228 write(fd, "\rp>\r", 4);
229 sleep(1);
230 if (ioctl(fd, IOCTL, (caddr_t)&b) >= 0) {
231 if (chars(b) != 10) {
232 nono:
233 if (already > MAXRETRY)
234 return (0);
235 write(fd, DISCONNECT_CMD, 4);
236 sleep(2);
237 already++;
238 goto retry;
239 } else {
240 read(fd, buf, 10);
241 if (strncmp(buf, "p >\r\n\r\n>", 8))
242 goto nono;
243 }
244 }
245 return (1);
246 }
247