1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 /*static char *sccsid = "from: @(#)linkaddr.c 5.2 (Berkeley) 2/24/91";*/ 36 static char *rcsid = "$Id: linkaddr.c,v 1.3 1993/08/26 00:46:09 jtc Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <net/if_dl.h> 42 #include <string.h> 43 44 /* States*/ 45 #define NAMING 0 46 #define GOTONE 1 47 #define GOTTWO 2 48 #define RESET 3 49 /* Inputs */ 50 #define DIGIT (4*0) 51 #define END (4*1) 52 #define DELIM (4*2) 53 #define LETTER (4*3) 54 55 void 56 link_addr(addr, sdl) 57 register const char *addr; 58 register struct sockaddr_dl *sdl; 59 { 60 register char *cp = sdl->sdl_data; 61 char *cplim = sdl->sdl_len + (char *)sdl; 62 register int byte = 0, state = NAMING, new; 63 64 bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1); 65 sdl->sdl_family = AF_LINK; 66 do { 67 state &= ~LETTER; 68 if ((*addr >= '0') && (*addr <= '9')) { 69 new = *addr - '0'; 70 } else if ((*addr >= 'a') && (*addr <= 'f')) { 71 new = *addr - 'a' + 10; 72 } else if ((*addr >= 'A') && (*addr <= 'F')) { 73 new = *addr - 'A' + 10; 74 } else if (*addr == 0) { 75 state |= END; 76 } else if (state == NAMING && 77 (((*addr >= 'A') && (*addr <= 'Z')) || 78 ((*addr >= 'a') && (*addr <= 'z')))) 79 state |= LETTER; 80 else 81 state |= DELIM; 82 addr++; 83 switch (state /* | INPUT */) { 84 case NAMING | DIGIT: 85 case NAMING | LETTER: 86 *cp++ = addr[-1]; continue; 87 case NAMING | DELIM: 88 state = RESET; sdl->sdl_nlen = cp - sdl->sdl_data; continue; 89 case GOTTWO | DIGIT: 90 *cp++ = byte; /*FALLTHROUGH*/ 91 case RESET | DIGIT: 92 state = GOTONE; byte = new; continue; 93 case GOTONE | DIGIT: 94 state = GOTTWO; byte = new + (byte << 4); continue; 95 default: /* | DELIM */ 96 state = RESET; *cp++ = byte; byte = 0; continue; 97 case GOTONE | END: 98 case GOTTWO | END: 99 *cp++ = byte; /* FALLTHROUGH */ 100 case RESET | END: 101 break; 102 } 103 break; 104 } while (cp < cplim); 105 sdl->sdl_alen = cp - LLADDR(sdl); 106 new = cp - (char *)sdl; 107 if (new > sizeof(*sdl)) 108 sdl->sdl_len = new; 109 return; 110 } 111 112 static char hexlist[] = "0123456789abcdef"; 113 114 char * 115 link_ntoa(sdl) 116 register const struct sockaddr_dl *sdl; 117 { 118 static char obuf[64]; 119 register char *out = obuf; 120 register int i; 121 register u_char *in = (u_char *)LLADDR(sdl); 122 u_char *inlim = in + sdl->sdl_nlen; 123 int firsttime = 1; 124 125 if (sdl->sdl_nlen) { 126 bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen); 127 out += sdl->sdl_nlen; 128 *out++ = ':'; 129 } 130 while (in < inlim) { 131 if (firsttime) firsttime = 0; else *out++ = '.'; 132 i = *in++; 133 if (i > 0xf) { 134 out[1] = hexlist[i & 0xf]; 135 i >>= 4; 136 out[0] = hexlist[i]; 137 out += 2; 138 } else 139 *out++ = hexlist[i]; 140 } 141 *out = 0; 142 return(obuf); 143 } 144