1 /*- 2 * Copyright (c) 1990 The 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[] = "@(#)linkaddr.c 5.2 (Berkeley) 02/24/91"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/types.h> 13 #include <sys/socket.h> 14 #include <net/if_dl.h> 15 #include <string.h> 16 17 /* States*/ 18 #define NAMING 0 19 #define GOTONE 1 20 #define GOTTWO 2 21 #define RESET 3 22 /* Inputs */ 23 #define DIGIT (4*0) 24 #define END (4*1) 25 #define DELIM (4*2) 26 #define LETTER (4*3) 27 28 void 29 link_addr(addr, sdl) 30 register const char *addr; 31 register struct sockaddr_dl *sdl; 32 { 33 register char *cp = sdl->sdl_data; 34 char *cplim = sdl->sdl_len + (char *)sdl; 35 register int byte = 0, state = NAMING, new; 36 37 bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1); 38 sdl->sdl_family = AF_LINK; 39 do { 40 state &= ~LETTER; 41 if ((*addr >= '0') && (*addr <= '9')) { 42 new = *addr - '0'; 43 } else if ((*addr >= 'a') && (*addr <= 'f')) { 44 new = *addr - 'a' + 10; 45 } else if ((*addr >= 'A') && (*addr <= 'F')) { 46 new = *addr - 'A' + 10; 47 } else if (*addr == 0) { 48 state |= END; 49 } else if (state == NAMING && 50 (((*addr >= 'A') && (*addr <= 'Z')) || 51 ((*addr >= 'a') && (*addr <= 'z')))) 52 state |= LETTER; 53 else 54 state |= DELIM; 55 addr++; 56 switch (state /* | INPUT */) { 57 case NAMING | DIGIT: 58 case NAMING | LETTER: 59 *cp++ = addr[-1]; continue; 60 case NAMING | DELIM: 61 state = RESET; sdl->sdl_nlen = cp - sdl->sdl_data; continue; 62 case GOTTWO | DIGIT: 63 *cp++ = byte; /*FALLTHROUGH*/ 64 case RESET | DIGIT: 65 state = GOTONE; byte = new; continue; 66 case GOTONE | DIGIT: 67 state = GOTTWO; byte = new + (byte << 4); continue; 68 default: /* | DELIM */ 69 state = RESET; *cp++ = byte; byte = 0; continue; 70 case GOTONE | END: 71 case GOTTWO | END: 72 *cp++ = byte; /* FALLTHROUGH */ 73 case RESET | END: 74 break; 75 } 76 break; 77 } while (cp < cplim); 78 sdl->sdl_alen = cp - LLADDR(sdl); 79 new = cp - (char *)sdl; 80 if (new > sizeof(*sdl)) 81 sdl->sdl_len = new; 82 return; 83 } 84 85 static char hexlist[] = "0123456789abcdef"; 86 87 char * 88 link_ntoa(sdl) 89 register const struct sockaddr_dl *sdl; 90 { 91 static char obuf[64]; 92 register char *out = obuf; 93 register int i; 94 register u_char *in = (u_char *)LLADDR(sdl); 95 u_char *inlim = in + sdl->sdl_nlen; 96 int firsttime = 1; 97 98 if (sdl->sdl_nlen) { 99 bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen); 100 out += sdl->sdl_nlen; 101 *out++ = ':'; 102 } 103 while (in < inlim) { 104 if (firsttime) firsttime = 0; else *out++ = '.'; 105 i = *in++; 106 if (i > 0xf) { 107 out[1] = hexlist[i & 0xf]; 108 i >>= 4; 109 out[0] = hexlist[i]; 110 out += 2; 111 } else 112 *out++ = hexlist[i]; 113 } 114 *out = 0; 115 return(obuf); 116 } 117