| 1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char sccsid[] = "@(#)biz31.c 5.1 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | #include "tip.h" |
| 12 | |
| 13 | #define MAXRETRY 3 /* sync up retry count */ |
| 14 | #define DISCONNECT_CMD "\21\25\11\24" /* disconnection string */ |
| 15 | |
| 16 | static int sigALRM(); |
| 17 | static int timeout = 0; |
| 18 | static jmp_buf timeoutbuf; |
| 19 | |
| 20 | /* |
| 21 | * Dial up on a BIZCOMP Model 1031 with either |
| 22 | * tone dialing (mod = "f") |
| 23 | * pulse dialing (mod = "w") |
| 24 | */ |
| 25 | static int |
| 26 | biz_dialer(num, mod) |
| 27 | char *num, *mod; |
| 28 | { |
| 29 | register int connected = 0; |
| 30 | |
| 31 | if (!bizsync(FD)) { |
| 32 | logent(value(HOST), "", "biz", "out of sync"); |
| 33 | printf("bizcomp out of sync\n"); |
| 34 | delock(uucplock); |
| 35 | exit(0); |
| 36 | } |
| 37 | if (boolean(value(VERBOSE))) |
| 38 | printf("\nstarting call..."); |
| 39 | echo("#\rk$\r$\n"); /* disable auto-answer */ |
| 40 | echo("$>$.$ #\r"); /* tone/pulse dialing */ |
| 41 | echo(mod); |
| 42 | echo("$\r$\n"); |
| 43 | echo("$>$.$ #\re$ "); /* disconnection sequence */ |
| 44 | echo(DISCONNECT_CMD); |
| 45 | echo("\r$\n$\r$\n"); |
| 46 | echo("$>$.$ #\rr$ "); /* repeat dial */ |
| 47 | echo(num); |
| 48 | echo("\r$\n"); |
| 49 | if (boolean(value(VERBOSE))) |
| 50 | printf("ringing..."); |
| 51 | /* |
| 52 | * The reply from the BIZCOMP should be: |
| 53 | * `^G NO CONNECTION\r\n^G\r\n' failure |
| 54 | * ` CONNECTION\r\n^G' success |
| 55 | */ |
| 56 | connected = detect(" "); |
| 57 | #ifdef ACULOG |
| 58 | if (timeout) { |
| 59 | char line[80]; |
| 60 | |
| 61 | sprintf(line, "%d second dial timeout", |
| 62 | number(value(DIALTIMEOUT))); |
| 63 | logent(value(HOST), num, "biz", line); |
| 64 | } |
| 65 | #endif |
| 66 | if (!connected) |
| 67 | flush(" NO CONNECTION\r\n\07\r\n"); |
| 68 | else |
| 69 | flush("CONNECTION\r\n\07"); |
| 70 | if (timeout) |
| 71 | biz31_disconnect(); /* insurance */ |
| 72 | return (connected); |
| 73 | } |
| 74 | |
| 75 | biz31w_dialer(num, acu) |
| 76 | char *num, *acu; |
| 77 | { |
| 78 | |
| 79 | return (biz_dialer(num, "w")); |
| 80 | } |
| 81 | |
| 82 | biz31f_dialer(num, acu) |
| 83 | char *num, *acu; |
| 84 | { |
| 85 | |
| 86 | return (biz_dialer(num, "f")); |
| 87 | } |
| 88 | |
| 89 | biz31_disconnect() |
| 90 | { |
| 91 | |
| 92 | write(FD, DISCONNECT_CMD, 4); |
| 93 | sleep(2); |
| 94 | ioctl(FD, TIOCFLUSH); |
| 95 | } |
| 96 | |
| 97 | biz31_abort() |
| 98 | { |
| 99 | |
| 100 | write(FD, "\33", 1); |
| 101 | } |
| 102 | |
| 103 | static int |
| 104 | echo(s) |
| 105 | register char *s; |
| 106 | { |
| 107 | char c; |
| 108 | |
| 109 | while (c = *s++) switch (c) { |
| 110 | |
| 111 | case '$': |
| 112 | read(FD, &c, 1); |
| 113 | s++; |
| 114 | break; |
| 115 | |
| 116 | case '#': |
| 117 | c = *s++; |
| 118 | write(FD, &c, 1); |
| 119 | break; |
| 120 | |
| 121 | default: |
| 122 | write(FD, &c, 1); |
| 123 | read(FD, &c, 1); |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | static int |
| 128 | sigALRM() |
| 129 | { |
| 130 | |
| 131 | timeout = 1; |
| 132 | longjmp(timeoutbuf, 1); |
| 133 | } |
| 134 | |
| 135 | static int |
| 136 | detect(s) |
| 137 | register char *s; |
| 138 | { |
| 139 | char c; |
| 140 | int (*f)(); |
| 141 | |
| 142 | f = signal(SIGALRM, sigALRM); |
| 143 | timeout = 0; |
| 144 | while (*s) { |
| 145 | if (setjmp(timeoutbuf)) { |
| 146 | printf("\07timeout waiting for reply\n"); |
| 147 | biz31_abort(); |
| 148 | break; |
| 149 | } |
| 150 | alarm(number(value(DIALTIMEOUT))); |
| 151 | read(FD, &c, 1); |
| 152 | alarm(0); |
| 153 | if (c != *s++) |
| 154 | break; |
| 155 | } |
| 156 | signal(SIGALRM, f); |
| 157 | return (timeout == 0); |
| 158 | } |
| 159 | |
| 160 | static int |
| 161 | flush(s) |
| 162 | register char *s; |
| 163 | { |
| 164 | char c; |
| 165 | int (*f)(); |
| 166 | |
| 167 | f = signal(SIGALRM, sigALRM); |
| 168 | while (*s++) { |
| 169 | if (setjmp(timeoutbuf)) |
| 170 | break; |
| 171 | alarm(10); |
| 172 | read(FD, &c, 1); |
| 173 | alarm(0); |
| 174 | } |
| 175 | signal(SIGALRM, f); |
| 176 | timeout = 0; /* guard against disconnection */ |
| 177 | } |
| 178 | |
| 179 | /* |
| 180 | * This convoluted piece of code attempts to get |
| 181 | * the bizcomp in sync. If you don't have the capacity or nread |
| 182 | * call there are gory ways to simulate this. |
| 183 | */ |
| 184 | static int |
| 185 | bizsync(fd) |
| 186 | { |
| 187 | #ifdef FIOCAPACITY |
| 188 | struct capacity b; |
| 189 | # define chars(b) ((b).cp_nbytes) |
| 190 | # define IOCTL FIOCAPACITY |
| 191 | #endif |
| 192 | #ifdef FIONREAD |
| 193 | long b; |
| 194 | # define chars(b) (b) |
| 195 | # define IOCTL FIONREAD |
| 196 | #endif |
| 197 | register int already = 0; |
| 198 | char buf[10]; |
| 199 | |
| 200 | retry: |
| 201 | if (ioctl(fd, IOCTL, (caddr_t)&b) >= 0 && chars(b) > 0) |
| 202 | ioctl(fd, TIOCFLUSH); |
| 203 | write(fd, "\rp>\r", 4); |
| 204 | sleep(1); |
| 205 | if (ioctl(fd, IOCTL, (caddr_t)&b) >= 0) { |
| 206 | if (chars(b) != 10) { |
| 207 | nono: |
| 208 | if (already > MAXRETRY) |
| 209 | return (0); |
| 210 | write(fd, DISCONNECT_CMD, 4); |
| 211 | sleep(2); |
| 212 | already++; |
| 213 | goto retry; |
| 214 | } else { |
| 215 | read(fd, buf, 10); |
| 216 | if (strncmp(buf, "p >\r\n\r\n>", 8)) |
| 217 | goto nono; |
| 218 | } |
| 219 | } |
| 220 | return (1); |
| 221 | } |