1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. 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[] = "@(#)linkaddr.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/types.h> 41 #include <sys/socket.h> 42 #include <net/if_dl.h> 43 #include <string.h> 44 45 /* States*/ 46 #define NAMING 0 47 #define GOTONE 1 48 #define GOTTWO 2 49 #define RESET 3 50 /* Inputs */ 51 #define DIGIT (4*0) 52 #define END (4*1) 53 #define DELIM (4*2) 54 #define LETTER (4*3) 55 56 void 57 link_addr(addr, sdl) 58 const char *addr; 59 struct sockaddr_dl *sdl; 60 { 61 char *cp = sdl->sdl_data; 62 char *cplim = sdl->sdl_len + (char *)sdl; 63 int byte = 0, state = NAMING, new; 64 65 bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1); 66 sdl->sdl_family = AF_LINK; 67 do { 68 state &= ~LETTER; 69 if ((*addr >= '0') && (*addr <= '9')) { 70 new = *addr - '0'; 71 } else if ((*addr >= 'a') && (*addr <= 'f')) { 72 new = *addr - 'a' + 10; 73 } else if ((*addr >= 'A') && (*addr <= 'F')) { 74 new = *addr - 'A' + 10; 75 } else if (*addr == 0) { 76 state |= END; 77 } else if (state == NAMING && 78 (((*addr >= 'A') && (*addr <= 'Z')) || 79 ((*addr >= 'a') && (*addr <= 'z')))) 80 state |= LETTER; 81 else 82 state |= DELIM; 83 addr++; 84 switch (state /* | INPUT */) { 85 case NAMING | DIGIT: 86 case NAMING | LETTER: 87 *cp++ = addr[-1]; 88 continue; 89 case NAMING | DELIM: 90 state = RESET; 91 sdl->sdl_nlen = cp - sdl->sdl_data; 92 continue; 93 case GOTTWO | DIGIT: 94 *cp++ = byte; 95 /* FALLTHROUGH */ 96 case RESET | DIGIT: 97 state = GOTONE; 98 byte = new; 99 continue; 100 case GOTONE | DIGIT: 101 state = GOTTWO; 102 byte = new + (byte << 4); 103 continue; 104 default: /* | DELIM */ 105 state = RESET; 106 *cp++ = byte; 107 byte = 0; 108 continue; 109 case GOTONE | END: 110 case GOTTWO | END: 111 *cp++ = byte; 112 /* FALLTHROUGH */ 113 case RESET | END: 114 break; 115 } 116 break; 117 } while (cp < cplim); 118 sdl->sdl_alen = cp - LLADDR(sdl); 119 new = cp - (char *)sdl; 120 if (new > sizeof(*sdl)) 121 sdl->sdl_len = new; 122 return; 123 } 124 125 static char hexlist[] = "0123456789abcdef"; 126 127 char * 128 link_ntoa(sdl) 129 const struct sockaddr_dl *sdl; 130 { 131 static char obuf[64]; 132 char *out = obuf; 133 int i; 134 u_char *in = (u_char *)LLADDR(sdl); 135 u_char *inlim = in + sdl->sdl_alen; 136 int firsttime = 1; 137 138 if (sdl->sdl_nlen) { 139 bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen); 140 out += sdl->sdl_nlen; 141 if (sdl->sdl_alen) 142 *out++ = ':'; 143 } 144 while (in < inlim) { 145 if (firsttime) 146 firsttime = 0; 147 else 148 *out++ = '.'; 149 i = *in++; 150 if (i > 0xf) { 151 out[1] = hexlist[i & 0xf]; 152 i >>= 4; 153 out[0] = hexlist[i]; 154 out += 2; 155 } else 156 *out++ = hexlist[i]; 157 } 158 *out = 0; 159 return (obuf); 160 } 161