1 /* 2 * Copyright (c) 1983 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)v831.c 5.5 (Berkeley) 03/02/91"; 10 #endif /* not lint */ 11 12 /* 13 * Routines for dialing up on Vadic 831 14 */ 15 #include "tip.h" 16 17 int v831_abort(); 18 static void alarmtr(); 19 extern int errno; 20 21 static jmp_buf jmpbuf; 22 static int child = -1; 23 24 v831_dialer(num, acu) 25 char *num, *acu; 26 { 27 int status, pid, connected = 1; 28 register int timelim; 29 static int dialit(); 30 31 if (boolean(value(VERBOSE))) 32 printf("\nstarting call..."); 33 #ifdef DEBUG 34 printf ("(acu=%s)\n", acu); 35 #endif 36 if ((AC = open(acu, O_RDWR)) < 0) { 37 if (errno == EBUSY) 38 printf("line busy..."); 39 else 40 printf("acu open error..."); 41 return (0); 42 } 43 if (setjmp(jmpbuf)) { 44 kill(child, SIGKILL); 45 close(AC); 46 return (0); 47 } 48 signal(SIGALRM, alarmtr); 49 timelim = 5 * strlen(num); 50 alarm(timelim < 30 ? 30 : timelim); 51 if ((child = fork()) == 0) { 52 /* 53 * ignore this stuff for aborts 54 */ 55 signal(SIGALRM, SIG_IGN); 56 signal(SIGINT, SIG_IGN); 57 signal(SIGQUIT, SIG_IGN); 58 sleep(2); 59 exit(dialit(num, acu) != 'A'); 60 } 61 /* 62 * open line - will return on carrier 63 */ 64 if ((FD = open(DV, O_RDWR)) < 0) { 65 #ifdef DEBUG 66 printf("(after open, errno=%d)\n", errno); 67 #endif 68 if (errno == EIO) 69 printf("lost carrier..."); 70 else 71 printf("dialup line open failed..."); 72 alarm(0); 73 kill(child, SIGKILL); 74 close(AC); 75 return (0); 76 } 77 alarm(0); 78 #ifdef notdef 79 ioctl(AC, TIOCHPCL, 0); 80 #endif 81 signal(SIGALRM, SIG_DFL); 82 while ((pid = wait(&status)) != child && pid != -1) 83 ; 84 if (status) { 85 close(AC); 86 return (0); 87 } 88 return (1); 89 } 90 91 static void 92 alarmtr() 93 { 94 alarm(0); 95 longjmp(jmpbuf, 1); 96 } 97 98 /* 99 * Insurance, for some reason we don't seem to be 100 * hanging up... 101 */ 102 v831_disconnect() 103 { 104 struct sgttyb cntrl; 105 106 sleep(2); 107 #ifdef DEBUG 108 printf("[disconnect: FD=%d]\n", FD); 109 #endif 110 if (FD > 0) { 111 ioctl(FD, TIOCCDTR, 0); 112 ioctl(FD, TIOCGETP, &cntrl); 113 cntrl.sg_ispeed = cntrl.sg_ospeed = 0; 114 ioctl(FD, TIOCSETP, &cntrl); 115 ioctl(FD, TIOCNXCL, (struct sgttyb *)NULL); 116 } 117 close(FD); 118 } 119 120 v831_abort() 121 { 122 123 #ifdef DEBUG 124 printf("[abort: AC=%d]\n", AC); 125 #endif 126 sleep(2); 127 if (child > 0) 128 kill(child, SIGKILL); 129 if (AC > 0) 130 ioctl(FD, TIOCNXCL, (struct sgttyb *)NULL); 131 close(AC); 132 if (FD > 0) 133 ioctl(FD, TIOCCDTR, 0); 134 close(FD); 135 } 136 137 /* 138 * Sigh, this probably must be changed at each site. 139 */ 140 struct vaconfig { 141 char *vc_name; 142 char vc_rack; 143 char vc_modem; 144 } vaconfig[] = { 145 { "/dev/cua0",'4','0' }, 146 { "/dev/cua1",'4','1' }, 147 { 0 } 148 }; 149 150 #define pc(x) (c = x, write(AC,&c,1)) 151 #define ABORT 01 152 #define SI 017 153 #define STX 02 154 #define ETX 03 155 156 static int 157 dialit(phonenum, acu) 158 register char *phonenum; 159 char *acu; 160 { 161 register struct vaconfig *vp; 162 struct sgttyb cntrl; 163 char c; 164 int i, two = 2; 165 static char *sanitize(); 166 167 phonenum = sanitize(phonenum); 168 #ifdef DEBUG 169 printf ("(dial phonenum=%s)\n", phonenum); 170 #endif 171 if (*phonenum == '<' && phonenum[1] == 0) 172 return ('Z'); 173 for (vp = vaconfig; vp->vc_name; vp++) 174 if (strcmp(vp->vc_name, acu) == 0) 175 break; 176 if (vp->vc_name == 0) { 177 printf("Unable to locate dialer (%s)\n", acu); 178 return ('K'); 179 } 180 ioctl(AC, TIOCGETP, &cntrl); 181 cntrl.sg_ispeed = cntrl.sg_ospeed = B2400; 182 cntrl.sg_flags = RAW | EVENP | ODDP; 183 ioctl(AC, TIOCSETP, &cntrl); 184 ioctl(AC, TIOCFLUSH, &two); 185 pc(STX); 186 pc(vp->vc_rack); 187 pc(vp->vc_modem); 188 while (*phonenum && *phonenum != '<') 189 pc(*phonenum++); 190 pc(SI); 191 pc(ETX); 192 sleep(1); 193 i = read(AC, &c, 1); 194 #ifdef DEBUG 195 printf("read %d chars, char=%c, errno %d\n", i, c, errno); 196 #endif 197 if (i != 1) 198 c = 'M'; 199 if (c == 'B' || c == 'G') { 200 char cc, oc = c; 201 202 pc(ABORT); 203 read(AC, &cc, 1); 204 #ifdef DEBUG 205 printf("abort response=%c\n", cc); 206 #endif 207 c = oc; 208 v831_disconnect(); 209 } 210 close(AC); 211 #ifdef DEBUG 212 printf("dialit: returns %c\n", c); 213 #endif 214 return (c); 215 } 216 217 static char * 218 sanitize(s) 219 register char *s; 220 { 221 static char buf[128]; 222 register char *cp; 223 224 for (cp = buf; *s; s++) { 225 if (!isdigit(*s) && *s == '<' && *s != '_') 226 continue; 227 if (*s == '_') 228 *s = '='; 229 *cp++ = *s; 230 } 231 *cp++ = 0; 232 return (buf); 233 } 234