1 | /* |
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2 | * Copyright (c) 1983, 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 | |
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34 | /* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro |
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35 | * Dep. Matematica Universidade de Coimbra, Portugal, Europe |
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36 | * |
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37 | * Permission to use, copy, modify, and distribute this software for any |
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38 | * purpose with or without fee is hereby granted, provided that the above |
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39 | * copyright notice and this permission notice appear in all copies. |
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40 | * |
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41 | * from getnetent.c 1.1 (Coimbra) 93/06/02 |
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42 | */ |
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43 | |
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44 | #if defined(LIBC_SCCS) && !defined(lint) |
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45 | static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93"; |
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46 | static char orig_rcsid[] = "From: Id: getnetent.c,v 8.4 1997/06/01 20:34:37 vixie Exp"; |
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47 | static chat rcsid[] = "$Id$"; |
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48 | #endif /* LIBC_SCCS and not lint */ |
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49 | |
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50 | #include <sys/types.h> |
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51 | #include <sys/socket.h> |
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52 | #include <netinet/in.h> |
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53 | #include <arpa/inet.h> |
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54 | #include <arpa/nameser.h> |
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55 | #include <netdb.h> |
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56 | #include <stdio.h> |
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57 | #include <string.h> |
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58 | |
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59 | #define MAXALIASES 35 |
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60 | |
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61 | static FILE *netf; |
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62 | static char line[BUFSIZ+1]; |
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63 | static struct netent net; |
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64 | static char *net_aliases[MAXALIASES]; |
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65 | static int _net_stayopen; |
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66 | |
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67 | void |
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68 | _setnethtent(f) |
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69 | int f; |
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70 | { |
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71 | |
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72 | if (netf == NULL) |
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73 | netf = fopen(_PATH_NETWORKS, "r" ); |
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74 | else |
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75 | rewind(netf); |
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76 | _net_stayopen |= f; |
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77 | } |
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78 | |
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79 | void |
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80 | _endnethtent() |
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81 | { |
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82 | |
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83 | if (netf) { |
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84 | fclose(netf); |
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85 | netf = NULL; |
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86 | } |
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87 | _net_stayopen = 0; |
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88 | } |
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89 | |
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90 | struct netent * |
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91 | getnetent() |
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92 | { |
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93 | char *p; |
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94 | register char *cp, **q; |
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95 | |
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96 | if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) |
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97 | return (NULL); |
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98 | again: |
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99 | p = fgets(line, sizeof line, netf); |
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100 | if (p == NULL) |
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101 | return (NULL); |
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102 | if (*p == '#') |
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103 | goto again; |
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104 | cp = strpbrk(p, "#\n"); |
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105 | if (cp == NULL) |
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106 | goto again; |
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107 | *cp = '\0'; |
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108 | net.n_name = p; |
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109 | cp = strpbrk(p, " \t"); |
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110 | if (cp == NULL) |
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111 | goto again; |
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112 | *cp++ = '\0'; |
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113 | while (*cp == ' ' || *cp == '\t') |
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114 | cp++; |
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115 | p = strpbrk(cp, " \t"); |
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116 | if (p != NULL) |
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117 | *p++ = '\0'; |
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118 | net.n_net = inet_network(cp); |
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119 | net.n_addrtype = AF_INET; |
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120 | q = net.n_aliases = net_aliases; |
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121 | if (p != NULL) |
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122 | cp = p; |
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123 | while (cp && *cp) { |
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124 | if (*cp == ' ' || *cp == '\t') { |
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125 | cp++; |
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126 | continue; |
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127 | } |
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128 | if (q < &net_aliases[MAXALIASES - 1]) |
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129 | *q++ = cp; |
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130 | cp = strpbrk(cp, " \t"); |
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131 | if (cp != NULL) |
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132 | *cp++ = '\0'; |
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133 | } |
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134 | *q = NULL; |
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135 | return (&net); |
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136 | } |
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137 | |
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138 | struct netent * |
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139 | _getnetbyhtname(name) |
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140 | register const char *name; |
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141 | { |
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142 | register struct netent *p; |
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143 | register char **cp; |
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144 | |
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145 | setnetent(_net_stayopen); |
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146 | while ( (p = getnetent()) ) { |
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147 | if (strcasecmp(p->n_name, name) == 0) |
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148 | break; |
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149 | for (cp = p->n_aliases; *cp != 0; cp++) |
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150 | if (strcasecmp(*cp, name) == 0) |
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151 | goto found; |
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152 | } |
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153 | found: |
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154 | if (!_net_stayopen) |
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155 | endnetent(); |
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156 | return (p); |
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157 | } |
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158 | |
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159 | struct netent * |
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160 | _getnetbyhtaddr(net, type) |
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161 | register unsigned long net; |
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162 | register int type; |
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163 | { |
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164 | register struct netent *p; |
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165 | |
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166 | setnetent(_net_stayopen); |
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167 | while ( (p = getnetent()) ) |
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168 | if (p->n_addrtype == type && p->n_net == net) |
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169 | break; |
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170 | if (!_net_stayopen) |
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171 | endnetent(); |
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172 | return (p); |
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173 | } |
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