1 | /*- |
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2 | * Copyright (c) 1994, Garrett Wollman |
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3 | * |
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4 | * Redistribution and use in source and binary forms, with or without |
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5 | * modification, are permitted provided that the following conditions |
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6 | * are met: |
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7 | * 1. Redistributions of source code must retain the above copyright |
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8 | * notice, this list of conditions and the following disclaimer. |
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9 | * 2. Redistributions in binary form must reproduce the above copyright |
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10 | * notice, this list of conditions and the following disclaimer in the |
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11 | * documentation and/or other materials provided with the distribution. |
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12 | * |
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13 | * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND |
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14 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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16 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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17 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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18 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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19 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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20 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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21 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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22 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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23 | * SUCH DAMAGE. |
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24 | */ |
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25 | |
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26 | #if defined(LIBC_SCCS) && !defined(lint) |
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27 | static char sccsid[] = "@(#)$Id$"; |
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28 | static char rcsid[] = "$Id$"; |
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29 | #endif /* LIBC_SCCS and not lint */ |
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30 | |
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31 | #include <sys/param.h> |
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32 | #include <sys/socket.h> |
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33 | #include <netinet/in.h> |
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34 | #include <arpa/inet.h> |
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35 | #include <netdb.h> |
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36 | #include <stdio.h> |
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37 | #include <stdlib.h> |
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38 | #include <ctype.h> |
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39 | #include <errno.h> |
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40 | #include <string.h> |
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41 | #include <arpa/nameser.h> |
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42 | #ifdef YP |
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43 | #include <rpc/rpc.h> |
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44 | #include <rpcsvc/yp_prot.h> |
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45 | #include <rpcsvc/ypclnt.h> |
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46 | #endif |
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47 | |
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48 | #define MAXALIASES 35 |
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49 | #define MAXADDRS 35 |
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50 | |
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51 | #ifdef YP |
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52 | static char *host_aliases[MAXALIASES]; |
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53 | #endif /* YP */ |
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54 | |
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55 | static struct netent * |
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56 | _getnetbynis(name, map, af) |
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57 | const char *name; |
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58 | char *map; |
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59 | int af; |
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60 | { |
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61 | #ifdef YP |
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62 | register char *cp, **q; |
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63 | static char *result; |
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64 | int resultlen; |
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65 | static struct netent h; |
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66 | static char *domain = (char *)NULL; |
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67 | static char ypbuf[YPMAXRECORD + 2]; |
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68 | |
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69 | switch(af) { |
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70 | case AF_INET: |
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71 | break; |
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72 | default: |
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73 | case AF_INET6: |
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74 | errno = EAFNOSUPPORT; |
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75 | return NULL; |
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76 | } |
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77 | |
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78 | if (domain == (char *)NULL) |
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79 | if (yp_get_default_domain (&domain)) |
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80 | return (NULL); |
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81 | |
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82 | if (yp_match(domain, map, name, strlen(name), &result, &resultlen)) |
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83 | return (NULL); |
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84 | |
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85 | bcopy((char *)result, (char *)&ypbuf, resultlen); |
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86 | ypbuf[resultlen] = '\0'; |
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87 | free(result); |
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88 | result = (char *)&ypbuf; |
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89 | |
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90 | if ((cp = index(result, '\n'))) |
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91 | *cp = '\0'; |
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92 | |
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93 | cp = strpbrk(result, " \t"); |
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94 | *cp++ = '\0'; |
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95 | h.n_name = result; |
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96 | |
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97 | while (*cp == ' ' || *cp == '\t') |
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98 | cp++; |
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99 | |
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100 | h.n_net = inet_network(cp); |
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101 | h.n_addrtype = AF_INET; |
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102 | |
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103 | q = h.n_aliases = host_aliases; |
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104 | cp = strpbrk(cp, " \t"); |
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105 | if (cp != NULL) |
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106 | *cp++ = '\0'; |
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107 | while (cp && *cp) { |
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108 | if (*cp == ' ' || *cp == '\t') { |
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109 | cp++; |
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110 | continue; |
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111 | } |
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112 | if (q < &host_aliases[MAXALIASES - 1]) |
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113 | *q++ = cp; |
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114 | cp = strpbrk(cp, " \t"); |
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115 | if (cp != NULL) |
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116 | *cp++ = '\0'; |
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117 | } |
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118 | *q = NULL; |
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119 | return (&h); |
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120 | #else |
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121 | return (NULL); |
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122 | #endif |
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123 | } |
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124 | |
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125 | struct netent * |
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126 | _getnetbynisname(name) |
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127 | const char *name; |
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128 | { |
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129 | return _getnetbynis(name, "networks.byname", AF_INET); |
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130 | } |
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131 | |
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132 | struct netent * |
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133 | _getnetbynisaddr(addr, af) |
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134 | unsigned long addr; |
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135 | int af; |
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136 | { |
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137 | char *str, *cp; |
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138 | unsigned long net2; |
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139 | int nn; |
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140 | unsigned int netbr[4]; |
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141 | char buf[MAXDNAME]; |
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142 | |
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143 | if (af != AF_INET) { |
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144 | errno = EAFNOSUPPORT; |
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145 | return (NULL); |
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146 | } |
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147 | |
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148 | for (nn = 4, net2 = addr; net2; net2 >>= 8) { |
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149 | netbr[--nn] = net2 & 0xff; |
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150 | } |
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151 | |
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152 | switch (nn) { |
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153 | case 3: /* Class A */ |
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154 | sprintf(buf, "%u", netbr[3]); |
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155 | break; |
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156 | case 2: /* Class B */ |
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157 | sprintf(buf, "%u.%u", netbr[2], netbr[3]); |
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158 | break; |
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159 | case 1: /* Class C */ |
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160 | sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]); |
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161 | break; |
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162 | case 0: /* Class D - E */ |
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163 | sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1], |
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164 | netbr[2], netbr[3]); |
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165 | break; |
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166 | } |
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167 | |
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168 | str = (char *)&buf; |
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169 | cp = str + (strlen(str) - 2); |
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170 | |
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171 | while(!strcmp(cp, ".0")) { |
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172 | *cp = '\0'; |
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173 | cp = str + (strlen(str) - 2); |
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174 | } |
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175 | |
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176 | return _getnetbynis(str, "networks.byaddr", af); |
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177 | } |
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