1 | #include "port_before.h" |
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2 | |
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3 | /*- |
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4 | * Copyright (c) 1994, Garrett Wollman |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions |
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8 | * are met: |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * |
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15 | * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND |
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16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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25 | * SUCH DAMAGE. |
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26 | */ |
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27 | |
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28 | #include <sys/cdefs.h> |
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29 | __FBSDID("$FreeBSD$"); |
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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 <resolv.h> |
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37 | #include <stdio.h> |
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38 | #include <stdlib.h> |
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39 | #include <ctype.h> |
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40 | #include <errno.h> |
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41 | #include <string.h> |
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42 | #include <stdarg.h> |
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43 | #include <nsswitch.h> |
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44 | #include <arpa/nameser.h> |
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45 | #ifdef YP |
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46 | #include <rpc/rpc.h> |
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47 | #include <rpcsvc/yp_prot.h> |
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48 | #include <rpcsvc/ypclnt.h> |
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49 | #endif |
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50 | #include "netdb_private.h" |
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51 | |
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52 | #ifdef YP |
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53 | static int |
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54 | _getnetbynis(const char *name, char *map, int af, struct netent *ne, |
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55 | struct netent_data *ned) |
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56 | { |
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57 | char *p, *bp, *ep; |
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58 | char *cp, **q; |
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59 | char *result; |
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60 | int resultlen, len; |
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61 | char ypbuf[YPMAXRECORD + 2]; |
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62 | |
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63 | switch(af) { |
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64 | case AF_INET: |
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65 | break; |
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66 | default: |
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67 | case AF_INET6: |
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68 | errno = EAFNOSUPPORT; |
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69 | return (-1); |
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70 | } |
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71 | |
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72 | if (ned->yp_domain == (char *)NULL) |
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73 | if (yp_get_default_domain (&ned->yp_domain)) |
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74 | return (-1); |
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75 | |
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76 | if (yp_match(ned->yp_domain, map, name, strlen(name), &result, |
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77 | &resultlen)) |
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78 | return (-1); |
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79 | |
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80 | bcopy((char *)result, (char *)&ypbuf, resultlen); |
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81 | ypbuf[resultlen] = '\0'; |
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82 | free(result); |
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83 | result = (char *)&ypbuf; |
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84 | |
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85 | if ((cp = index(result, '\n'))) |
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86 | *cp = '\0'; |
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87 | |
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88 | cp = strpbrk(result, " \t"); |
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89 | *cp++ = '\0'; |
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90 | bp = ned->netbuf; |
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91 | ep = ned->netbuf + sizeof ned->netbuf; |
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92 | len = strlen(result) + 1; |
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93 | if (ep - bp < len) { |
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94 | RES_SET_H_ERRNO(__res_state(), NO_RECOVERY); |
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95 | return (-1); |
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96 | } |
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97 | strlcpy(bp, result, ep - bp); |
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98 | ne->n_name = bp; |
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99 | bp += len; |
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100 | |
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101 | while (*cp == ' ' || *cp == '\t') |
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102 | cp++; |
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103 | |
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104 | ne->n_net = inet_network(cp); |
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105 | ne->n_addrtype = AF_INET; |
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106 | |
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107 | q = ne->n_aliases = ned->net_aliases; |
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108 | cp = strpbrk(cp, " \t"); |
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109 | if (cp != NULL) |
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110 | *cp++ = '\0'; |
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111 | while (cp && *cp) { |
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112 | if (*cp == ' ' || *cp == '\t') { |
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113 | cp++; |
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114 | continue; |
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115 | } |
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116 | if (q > &ned->net_aliases[_MAXALIASES - 1]) |
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117 | break; |
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118 | p = strpbrk(cp, " \t"); |
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119 | if (p != NULL) |
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120 | *p++ = '\0'; |
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121 | len = strlen(cp) + 1; |
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122 | if (ep - bp < len) |
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123 | break; |
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124 | strlcpy(bp, cp, ep - bp); |
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125 | *q++ = bp; |
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126 | bp += len; |
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127 | cp = p; |
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128 | } |
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129 | *q = NULL; |
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130 | return (0); |
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131 | } |
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132 | #endif /* YP */ |
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133 | |
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134 | int |
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135 | _nis_getnetbyname(void *rval, void *cb_data, va_list ap) |
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136 | { |
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137 | #ifdef YP |
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138 | const char *name; |
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139 | char *buffer; |
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140 | size_t buflen; |
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141 | int *errnop, *h_errnop; |
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142 | struct netent *nptr, ne; |
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143 | struct netent_data *ned; |
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144 | res_state statp; |
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145 | |
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146 | name = va_arg(ap, const char *); |
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147 | nptr = va_arg(ap, struct netent *); |
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148 | buffer = va_arg(ap, char *); |
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149 | buflen = va_arg(ap, size_t); |
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150 | errnop = va_arg(ap, int *); |
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151 | h_errnop = va_arg(ap, int *); |
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152 | |
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153 | statp = __res_state(); |
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154 | if ((ned = __netent_data_init()) == NULL) { |
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155 | RES_SET_H_ERRNO(statp, NETDB_INTERNAL); |
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156 | *h_errnop = statp->res_h_errno; |
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157 | return (NS_UNAVAIL); |
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158 | } |
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159 | |
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160 | if (_getnetbynis(name, "networks.byname", AF_INET, &ne, ned) != 0) { |
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161 | *h_errnop = statp->res_h_errno; |
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162 | return (NS_NOTFOUND); |
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163 | } |
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164 | if (__copy_netent(&ne, nptr, buffer, buflen) != 0) { |
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165 | *errnop = errno; |
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166 | RES_SET_H_ERRNO(statp, NETDB_INTERNAL); |
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167 | *h_errnop = statp->res_h_errno; |
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168 | return (NS_RETURN); |
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169 | } |
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170 | *((struct netent **)rval) = nptr; |
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171 | return (NS_SUCCESS); |
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172 | #else |
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173 | return (NS_UNAVAIL); |
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174 | #endif |
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175 | |
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176 | } |
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177 | |
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178 | int |
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179 | _nis_getnetbyaddr(void *rval, void *cb_data, va_list ap) |
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180 | { |
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181 | #ifdef YP |
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182 | uint32_t addr; |
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183 | int af; |
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184 | char *buffer; |
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185 | size_t buflen; |
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186 | int *errnop, *h_errnop; |
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187 | struct netent *nptr, ne; |
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188 | struct netent_data *ned; |
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189 | char *str, *cp; |
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190 | uint32_t net2; |
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191 | int nn; |
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192 | unsigned int netbr[4]; |
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193 | char buf[MAXDNAME]; |
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194 | res_state statp; |
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195 | |
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196 | addr = va_arg(ap, uint32_t); |
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197 | af = va_arg(ap, int); |
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198 | nptr = va_arg(ap, struct netent *); |
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199 | buffer = va_arg(ap, char *); |
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200 | buflen = va_arg(ap, size_t); |
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201 | errnop = va_arg(ap, int *); |
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202 | h_errnop = va_arg(ap, int *); |
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203 | |
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204 | statp = __res_state(); |
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205 | if ((ned = __netent_data_init()) == NULL) { |
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206 | RES_SET_H_ERRNO(statp, NETDB_INTERNAL); |
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207 | *h_errnop = statp->res_h_errno; |
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208 | return (NS_UNAVAIL); |
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209 | } |
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210 | |
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211 | if (af != AF_INET) { |
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212 | RES_SET_H_ERRNO(statp, NETDB_INTERNAL); |
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213 | *h_errnop = statp->res_h_errno; |
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214 | errno = EAFNOSUPPORT; |
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215 | return (NS_UNAVAIL); |
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216 | } |
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217 | |
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218 | for (nn = 4, net2 = addr; net2; net2 >>= 8) { |
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219 | netbr[--nn] = net2 & 0xff; |
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220 | } |
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221 | |
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222 | switch (nn) { |
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223 | case 3: /* Class A */ |
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224 | sprintf(buf, "%u", netbr[3]); |
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225 | break; |
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226 | case 2: /* Class B */ |
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227 | sprintf(buf, "%u.%u", netbr[2], netbr[3]); |
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228 | break; |
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229 | case 1: /* Class C */ |
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230 | sprintf(buf, "%u.%u.%u", netbr[1], netbr[2], netbr[3]); |
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231 | break; |
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232 | case 0: /* Class D - E */ |
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233 | sprintf(buf, "%u.%u.%u.%u", netbr[0], netbr[1], |
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234 | netbr[2], netbr[3]); |
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235 | break; |
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236 | } |
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237 | |
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238 | str = (char *)&buf; |
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239 | cp = str + (strlen(str) - 2); |
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240 | |
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241 | while(!strcmp(cp, ".0")) { |
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242 | *cp = '\0'; |
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243 | cp = str + (strlen(str) - 2); |
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244 | } |
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245 | |
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246 | if (_getnetbynis(str, "networks.byaddr", af, &ne, ned) != 0) { |
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247 | *h_errnop = statp->res_h_errno; |
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248 | return (NS_NOTFOUND); |
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249 | } |
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250 | if (__copy_netent(&ne, nptr, buffer, buflen) != 0) { |
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251 | *errnop = errno; |
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252 | RES_SET_H_ERRNO(statp, NETDB_INTERNAL); |
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253 | *h_errnop = statp->res_h_errno; |
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254 | return (NS_RETURN); |
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255 | } |
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256 | *((struct netent **)rval) = nptr; |
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257 | return (NS_SUCCESS); |
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258 | #else |
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259 | return (NS_UNAVAIL); |
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260 | #endif /* YP */ |
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261 | } |
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