1 | /*- |
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2 | * Copyright (c) 1990, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | * |
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33 | * $Id$ |
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34 | */ |
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35 | |
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36 | #if defined(LIBC_SCCS) && !defined(lint) |
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37 | static char sccsid[] = "@(#)linkaddr.c 8.1 (Berkeley) 6/4/93"; |
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38 | #endif /* LIBC_SCCS and not lint */ |
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39 | |
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40 | #include <sys/types.h> |
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41 | #include <sys/socket.h> |
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42 | #include <net/if_dl.h> |
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43 | #include <string.h> |
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44 | |
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45 | /* States*/ |
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46 | #define NAMING 0 |
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47 | #define GOTONE 1 |
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48 | #define GOTTWO 2 |
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49 | #define RESET 3 |
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50 | /* Inputs */ |
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51 | #define DIGIT (4*0) |
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52 | #define END (4*1) |
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53 | #define DELIM (4*2) |
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54 | #define LETTER (4*3) |
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55 | |
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56 | void |
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57 | link_addr(addr, sdl) |
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58 | register const char *addr; |
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59 | register struct sockaddr_dl *sdl; |
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60 | { |
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61 | register char *cp = sdl->sdl_data; |
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62 | char *cplim = sdl->sdl_len + (char *)sdl; |
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63 | register int byte = 0, state = NAMING, |
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64 | new=0; /* new=0 to avoid warning */ |
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65 | |
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66 | bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1); |
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67 | sdl->sdl_family = AF_LINK; |
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68 | do { |
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69 | state &= ~LETTER; |
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70 | if ((*addr >= '0') && (*addr <= '9')) { |
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71 | new = *addr - '0'; |
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72 | } else if ((*addr >= 'a') && (*addr <= 'f')) { |
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73 | new = *addr - 'a' + 10; |
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74 | } else if ((*addr >= 'A') && (*addr <= 'F')) { |
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75 | new = *addr - 'A' + 10; |
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76 | } else if (*addr == 0) { |
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77 | state |= END; |
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78 | } else if (state == NAMING && |
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79 | (((*addr >= 'A') && (*addr <= 'Z')) || |
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80 | ((*addr >= 'a') && (*addr <= 'z')))) |
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81 | state |= LETTER; |
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82 | else |
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83 | state |= DELIM; |
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84 | addr++; |
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85 | switch (state /* | INPUT */) { |
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86 | case NAMING | DIGIT: |
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87 | case NAMING | LETTER: |
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88 | *cp++ = addr[-1]; |
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89 | continue; |
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90 | case NAMING | DELIM: |
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91 | state = RESET; |
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92 | sdl->sdl_nlen = cp - sdl->sdl_data; |
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93 | continue; |
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94 | case GOTTWO | DIGIT: |
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95 | *cp++ = byte; |
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96 | /* FALLTHROUGH */ |
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97 | case RESET | DIGIT: |
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98 | state = GOTONE; |
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99 | byte = new; |
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100 | continue; |
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101 | case GOTONE | DIGIT: |
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102 | state = GOTTWO; |
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103 | byte = new + (byte << 4); |
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104 | continue; |
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105 | default: /* | DELIM */ |
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106 | state = RESET; |
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107 | *cp++ = byte; |
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108 | byte = 0; |
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109 | continue; |
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110 | case GOTONE | END: |
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111 | case GOTTWO | END: |
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112 | *cp++ = byte; |
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113 | /* FALLTHROUGH */ |
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114 | case RESET | END: |
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115 | break; |
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116 | } |
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117 | break; |
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118 | } while (cp < cplim); |
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119 | sdl->sdl_alen = cp - LLADDR(sdl); |
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120 | new = cp - (char *)sdl; |
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121 | if (new > sizeof(*sdl)) |
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122 | sdl->sdl_len = new; |
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123 | return; |
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124 | } |
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125 | |
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126 | static char hexlist[] = "0123456789abcdef"; |
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127 | |
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128 | char * |
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129 | link_ntoa(sdl) |
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130 | register const struct sockaddr_dl *sdl; |
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131 | { |
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132 | static char obuf[64]; |
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133 | register char *out = obuf; |
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134 | register int i; |
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135 | register u_char *in = (u_char *)LLADDR(sdl); |
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136 | u_char *inlim = in + sdl->sdl_alen; |
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137 | int firsttime = 1; |
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138 | |
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139 | if (sdl->sdl_nlen) { |
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140 | bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen); |
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141 | out += sdl->sdl_nlen; |
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142 | if (sdl->sdl_alen) |
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143 | *out++ = ':'; |
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144 | } |
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145 | while (in < inlim) { |
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146 | if (firsttime) |
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147 | firsttime = 0; |
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148 | else |
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149 | *out++ = '.'; |
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150 | i = *in++; |
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151 | if (i > 0xf) { |
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152 | out[1] = hexlist[i & 0xf]; |
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153 | i >>= 4; |
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154 | out[0] = hexlist[i]; |
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155 | out += 2; |
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156 | } else |
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157 | *out++ = hexlist[i]; |
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158 | } |
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159 | *out = 0; |
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160 | return (obuf); |
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161 | } |
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