1 /* 2 * Copyright (c) 1989 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)iso_addr.c 5.3 (Berkeley) 06/01/90"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/types.h> 13 #include <netiso/iso.h> 14 /* States*/ 15 #define VIRGIN 0 16 #define GOTONE 1 17 #define GOTTWO 2 18 /* Inputs */ 19 #define DIGIT (4*0) 20 #define END (4*1) 21 #define DELIM (4*2) 22 23 struct iso_addr * 24 iso_addr(addr) 25 register char *addr; 26 { 27 static struct iso_addr out_addr; 28 register char *cp = out_addr.isoa_genaddr; 29 char *cplim = cp + sizeof(out_addr.isoa_genaddr); 30 register int byte = 0, state = VIRGIN, new; 31 32 bzero((char *)&out_addr, sizeof(out_addr)); 33 do { 34 if ((*addr >= '0') && (*addr <= '9')) { 35 new = *addr - '0'; 36 } else if ((*addr >= 'a') && (*addr <= 'f')) { 37 new = *addr - 'a' + 10; 38 } else if ((*addr >= 'A') && (*addr <= 'F')) { 39 new = *addr - 'A' + 10; 40 } else if (*addr == 0) 41 state |= END; 42 else 43 state |= DELIM; 44 addr++; 45 switch (state /* | INPUT */) { 46 case GOTTWO | DIGIT: 47 *cp++ = byte; /*FALLTHROUGH*/ 48 case VIRGIN | DIGIT: 49 state = GOTONE; byte = new; continue; 50 case GOTONE | DIGIT: 51 state = GOTTWO; byte = new + (byte << 4); continue; 52 default: /* | DELIM */ 53 state = VIRGIN; *cp++ = byte; byte = 0; continue; 54 case GOTONE | END: 55 case GOTTWO | END: 56 *cp++ = byte; /* FALLTHROUGH */ 57 case VIRGIN | END: 58 break; 59 } 60 break; 61 } while (cp < cplim); 62 out_addr.isoa_len = cp - out_addr.isoa_genaddr; 63 return (&out_addr); 64 } 65 static char hexlist[] = "0123456789abcdef"; 66 67 char * 68 iso_ntoa(isoa) 69 struct iso_addr *isoa; 70 { 71 static char obuf[64]; 72 register char *out = obuf; 73 register int i; 74 register u_char *in = (u_char *)isoa->isoa_genaddr; 75 u_char *inlim = in + isoa->isoa_len; 76 77 out[1] = 0; 78 while (in < inlim) { 79 i = *in++; 80 *out++ = '.'; 81 if (i > 0xf) { 82 out[1] = hexlist[i & 0xf]; 83 i >>= 4; 84 out[0] = hexlist[i]; 85 out += 2; 86 } else 87 *out++ = hexlist[i]; 88 } 89 *out = 0; 90 return(obuf + 1); 91 } 92