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259
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1 /* LDAP client interface for XEmacs.
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265
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2 Copyright (C) 1998 Free Software Foundation, Inc.
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259
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not in FSF. */
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22
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23 /* Author: Oscar Figueiredo */
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24
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25 /* This file provides lisp primitives for access to an LDAP library
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26 conforming to the API defined in RFC 1823.
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27 It has been tested with:
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28 - UMich LDAP 3.3 (http://www.umich.edu/~dirsvcs/ldap/)
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29 - Netscape's LDAP SDK 1.0 (http://developer.netscape.com) */
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30
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31
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32 #include <config.h>
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33 #include "lisp.h"
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34
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265
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35 #include <errno.h>
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259
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36 #include <lber.h>
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37 #include <ldap.h>
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38
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276
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39 #include "eldap.h"
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40
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259
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41 #ifdef HAVE_NS_LDAP
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42 #define HAVE_LDAP_SET_OPTION 1
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43 #define HAVE_LDAP_GET_ERRNO 1
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44 #else
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45 #undef HAVE_LDAP_SET_OPTION
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46 #undef HAVE_LDAP_GET_ERRNO
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47 #endif
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48
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276
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49
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259
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50
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276
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51 static int ldap_default_port;
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52 static Lisp_Object Vldap_default_base;
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53
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54 /* ldap-open plist keywords */
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55 static Lisp_Object Qport, Qauth, Qbinddn, Qpasswd, Qderef, Qtimelimit,
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56 Qsizelimit;
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259
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57 /* Search scope limits */
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58 static Lisp_Object Qbase, Qonelevel, Qsubtree;
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59 /* Authentication methods */
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60 #ifdef LDAP_AUTH_KRBV41
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61 static Lisp_Object Qkrbv41;
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62 #endif
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63 #ifdef LDAP_AUTH_KRBV42
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64 static Lisp_Object Qkrbv42;
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65 #endif
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66 /* Deref policy */
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261
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67 static Lisp_Object Qnever, Qalways, Qfind;
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259
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68
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276
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69 static Lisp_Object Qldapp;
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70
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71
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72 /************************************************************************/
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73 /* Utility Functions */
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74 /************************************************************************/
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75
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76 static void
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77 signal_ldap_error (LDAP *ld)
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78 {
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79 #if HAVE_LDAP_GET_ERRNO
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80 signal_simple_error
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81 ("LDAP error",
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82 build_string (ldap_err2string (ldap_get_lderrno (ld, NULL, NULL))));
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83 #else
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84 signal_simple_error ("LDAP error",
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85 build_string (ldap_err2string (ld->ld_errno)));
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86 #endif
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87 }
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88
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89
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90 /************************************************************************/
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91 /* The ldap Lisp object */
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92 /************************************************************************/
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93
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94 /*
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95 * Structure records pertinent information about an open LDAP connection.
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96 */
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97
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98 struct Lisp_LDAP
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99 {
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100 /* lcrecord header */
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101 struct lcrecord_header header;
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102 /* The LDAP connection handle used by the LDAP API */
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103 LDAP *ld;
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104 /* Name of the host we connected to */
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105 Lisp_Object host;
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106 /* Status of the LDAP connection.
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107 This is a symbol: open or closed */
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108 Lisp_Object status_symbol;
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109 };
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110
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111
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112
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113 static Lisp_Object
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114 mark_ldap (Lisp_Object obj, void (*markobj) (Lisp_Object))
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115 {
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116 struct Lisp_LDAP *ldap = XLDAP (obj);
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117 ((markobj) (ldap->host));
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118 return ldap->status_symbol;
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119 }
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120
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121 static void
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122 print_ldap (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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123 {
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124 char buf[16];
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125
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126 struct Lisp_LDAP *ldap = XLDAP (obj);
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127
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128 if (print_readably)
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129 error ("printing unreadable object #<ldap %s>",
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130 XSTRING_DATA (ldap->host));
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131
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132 if (!escapeflag)
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133 {
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134 print_internal (ldap->host, printcharfun, 0);
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135 }
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136 else
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137 {
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138 write_c_string (GETTEXT ("#<ldap "), printcharfun);
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139 print_internal (ldap->host, printcharfun, 1);
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140 write_c_string (" state:",printcharfun);
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141 print_internal (ldap->status_symbol, printcharfun, 1);
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142 sprintf (buf, " 0x%x>", ldap);
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143 write_c_string (buf, printcharfun);
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144 }
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145 }
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146
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147 static struct Lisp_LDAP *
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148 allocate_ldap (void)
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149 {
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150 struct Lisp_LDAP *ldap =
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151 alloc_lcrecord_type (struct Lisp_LDAP, lrecord_ldap);
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152
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153 ldap->ld = (LDAP *) NULL;
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154 ldap->host = Qnil;
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155 ldap->status_symbol = Qnil;
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156 return ldap;
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157 }
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158
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159 DEFINE_LRECORD_IMPLEMENTATION ("ldap", ldap,
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160 mark_ldap, print_ldap, NULL,
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161 NULL, NULL, struct Lisp_LDAP);
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162
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163
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164
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165
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166 /************************************************************************/
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167 /* Basic ldap accessors */
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168 /************************************************************************/
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169
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170 DEFUN ("ldapp", Fldapp, 1, 1, 0, /*
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171 Return t if OBJECT is a LDAP connection.
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172 */
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173 (object))
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174 {
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175 return LDAPP (object) ? Qt : Qnil;
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176 }
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177
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178
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179 DEFUN ("ldap-host", Fldap_host, 1, 1, 0, /*
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180 Return the server host of the connection LDAP, as a string.
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181 */
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182 (ldap))
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183 {
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184 CHECK_LDAP (ldap);
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185 return (XLDAP (ldap))->host;
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186 }
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187
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188
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189
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190 DEFUN ("ldap-status", Fldap_status, 1, 1, 0, /*
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191 Return the status of the connection LDAP.
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192 This is a symbol, one of these:
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193
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194 open -- for a LDAP connection that is open.
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195 closed -- for a LDAP connection that is closed.
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196 */
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197 (ldap))
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198 {
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199 CHECK_LDAP (ldap);
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200 return (XLDAP (ldap))->status_symbol;
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201 }
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202
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203
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204
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205 /************************************************************************/
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206 /* Opening/Closing a LDAP connection */
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207 /************************************************************************/
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208
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209
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210 DEFUN ("ldap-open", Fldap_open, 1, 2, 0, /*
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211 Open a LDAP connection to HOST.
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212 PLIST is a plist containing additional parameters for the connection.
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259
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213 Valid keys in that list are:
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276
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214 `port' the TCP port to use for the connection if different from
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215 `ldap-default-port'.
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259
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216 `auth' is the authentication method to use, possible values depend on
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217 the LDAP library XEmacs was compiled with: `simple', `krbv41' and `krbv42'.
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218 `binddn' is the distinguished name of the user to bind as (in RFC 1779 syntax).
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219 `passwd' is the password to use for simple authentication.
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220 `deref' is one of the symbols `never', `always', `search' or `find'.
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221 `timelimit' is the timeout limit for the connection in seconds.
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222 `sizelimit' is the maximum number of matches to return.
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223 */
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276
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224 (host, plist))
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259
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225 {
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276
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226 /* This function can call lisp */
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259
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227
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276
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228 struct Lisp_LDAP *lisp_ldap;
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259
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229 LDAP *ld;
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276
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230 int ldap_port = 0;
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259
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231 int ldap_auth = LDAP_AUTH_SIMPLE;
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232 char *ldap_binddn = NULL;
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233 char *ldap_passwd = NULL;
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234 int ldap_deref = LDAP_DEREF_NEVER;
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235 int ldap_timelimit = 0;
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236 int ldap_sizelimit = 0;
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276
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237 int err;
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259
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238
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276
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239 Lisp_Object ldap, list, keyword, value;
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240 struct gcpro gcpro1;
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259
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241
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276
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242 ldap = Qnil;
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243 GCPRO1 (ldap);
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259
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244
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276
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245 CHECK_STRING (host);
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246
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247 EXTERNAL_PROPERTY_LIST_LOOP(list, keyword, value, plist)
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248 {
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249 /* TCP Port */
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250 if (EQ (keyword, Qport))
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259
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251 {
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276
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252 CHECK_INT (value);
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253 ldap_port = XINT (value);
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259
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254 }
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255 /* Authentication method */
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276
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256 if (EQ (keyword, Qauth))
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259
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257 {
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258 CHECK_SYMBOL (value);
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259
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260 if (EQ (value, Qsimple))
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261 ldap_auth = LDAP_AUTH_SIMPLE;
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262 #ifdef LDAP_AUTH_KRBV41
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263 else if (EQ (value, Qkrbv41))
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264 ldap_auth = LDAP_AUTH_KRBV41;
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265 #endif
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266 #ifdef LDAP_AUTH_KRBV42
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267 else if (EQ (value, Qkrbv42))
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268 ldap_auth = LDAP_AUTH_KRBV42;
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269 #endif
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270 else
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271 signal_simple_error ("Invalid authentication method", value);
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272 }
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273 /* Bind DN */
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274 else if (EQ (keyword, Qbinddn))
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275 {
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276
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276 CHECK_STRING (value);
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277 ldap_binddn = alloca (XSTRING_LENGTH (value) + 1);
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278 strcpy (ldap_binddn, (char *)XSTRING_DATA (value));
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259
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279 }
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280 /* Password */
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281 else if (EQ (keyword, Qpasswd))
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282 {
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276
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283 CHECK_STRING (value);
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284 ldap_passwd = alloca (XSTRING_LENGTH (value) + 1);
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285 strcpy (ldap_passwd, (char *)XSTRING_DATA (value));
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259
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286 }
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287 /* Deref */
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288 else if (EQ (keyword, Qderef))
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289 {
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290 CHECK_SYMBOL (value);
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291 if (EQ (value, Qnever))
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292 ldap_deref = LDAP_DEREF_NEVER;
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293 else if (EQ (value, Qsearch))
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294 ldap_deref = LDAP_DEREF_SEARCHING;
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295 else if (EQ (value, Qfind))
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296 ldap_deref = LDAP_DEREF_FINDING;
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297 else if (EQ (value, Qalways))
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298 ldap_deref = LDAP_DEREF_ALWAYS;
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299 else
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300 signal_simple_error ("Invalid deref value", value);
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301 }
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302 /* Timelimit */
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303 else if (EQ (keyword, Qtimelimit))
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304 {
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276
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305 CHECK_INT (value);
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306 ldap_timelimit = XINT (value);
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259
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307 }
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308 /* Sizelimit */
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309 else if (EQ (keyword, Qsizelimit))
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310 {
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276
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311 CHECK_INT (value);
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312 ldap_sizelimit = XINT (value);
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259
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313 }
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314 }
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315
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276
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316 if (ldap_port == 0)
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259
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317 {
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276
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318 ldap_port = ldap_default_port;
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259
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319 }
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320
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276
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321 /* Connect to the server and bind */
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322 ld = ldap_open ((char *)XSTRING_DATA (host), ldap_port);
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323 if (ld == NULL )
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324 signal_simple_error_2 ("Failed connecting to host",
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325 host,
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326 lisp_strerror (errno));
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259
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327
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328
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329 #if HAVE_LDAP_SET_OPTION
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330 if (ldap_set_option (ld, LDAP_OPT_DEREF, (void *)&ldap_deref) != LDAP_SUCCESS)
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276
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331 signal_ldap_error (ld);
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332 if (ldap_set_option (ld, LDAP_OPT_TIMELIMIT,
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333 (void *)&ldap_timelimit) != LDAP_SUCCESS)
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334 signal_ldap_error (ld);
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335 if (ldap_set_option (ld, LDAP_OPT_SIZELIMIT,
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336 (void *)&ldap_sizelimit) != LDAP_SUCCESS)
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337 signal_ldap_error (ld);
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259
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338 if (ldap_set_option (ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON) != LDAP_SUCCESS)
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276
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339 signal_ldap_error (ld);
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259
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340 #else /* HAVE_LDAP_SET_OPTION */
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341 ld->ld_deref = ldap_deref;
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342 ld->ld_timelimit = ldap_timelimit;
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343 ld->ld_sizelimit = ldap_sizelimit;
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344 #ifdef LDAP_REFERRALS
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345 ld->ld_options = LDAP_OPT_REFERRALS;
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346 #else /* LDAP_REFERRALS */
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347 ld->ld_options = 0;
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348 #endif /* LDAP_REFERRALS */
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349 #endif /* HAVE_LDAP_SET_OPTION */
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350
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276
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351 /* ldap_bind_s calls select and may be wedged by spurious signals */
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352 slow_down_interrupts ();
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353 err = ldap_bind_s (ld, ldap_binddn, ldap_passwd, ldap_auth);
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354 speed_up_interrupts ();
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355 if (err != LDAP_SUCCESS)
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259
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356 signal_simple_error ("Failed binding to the server",
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357 build_string (ldap_err2string (err)));
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358
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276
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359 lisp_ldap = allocate_ldap ();
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360 lisp_ldap->ld = ld;
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361 lisp_ldap->host = host;
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362 lisp_ldap->status_symbol = Qopen;
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363 XSETLDAP (ldap,lisp_ldap);
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364
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365 UNGCPRO;
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366 return ldap;
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367 }
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368
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369
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370
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371 DEFUN ("ldap-close", Fldap_close, 1, 1, 0, /*
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372 Close an LDAP connection.
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|
373 Return t if the connection was actually closed or nil if
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374 it was already closed before the call
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375 */
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376 (ldap))
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377 {
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378 CHECK_LDAP (ldap);
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379 if ( EQ ((XLDAP (ldap))->status_symbol, Qopen) )
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259
|
380 {
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276
|
381 ldap_unbind ((XLDAP (ldap))->ld);
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382 (XLDAP (ldap))->status_symbol = Qclosed;
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|
383 return Qt;
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|
384 }
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|
385 return Qnil;
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|
386 }
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|
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387
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|
|
388
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|
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389
|
|
|
390 /************************************************************************/
|
|
|
391 /* Working on a LDAP connection */
|
|
|
392 /************************************************************************/
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|
|
393
|
|
|
394 DEFUN ("ldap-search-internal", Fldap_search_internal, 2, 6, 0, /*
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|
|
395 Perform a search on an open LDAP connection.
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|
|
396 LDAP is an LDAP connection object created with `ldap-open'.
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|
|
397 FILTER is a filter string for the search as described in RFC 1558
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|
|
398 BASE is the distinguished name at which to start the search
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|
|
399 SCOPE is an integer or a symbol indicating the scope of the search
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|
|
400 Possible values are `ldap-scope-base', `ldap-scope-onelevel' or
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|
|
401 `ldap-scope-subtree'
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|
|
402 ATTRS is a list of strings indicating which attributes to retrieve
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|
|
403 for each matching entry. If nil return all available attributes.
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|
|
404 If ATTRSONLY is non-nil then only the attributes are retrieved, not
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|
|
405 the associated values
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|
406 The function returns a list of matching entries. Each entry is itself
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|
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407 an alist of attribute/values.
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408 */
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409 (ldap, filter, base, scope, attrs, attrsonly))
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410 {
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411 /* This function can call lisp */
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412
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413 /* Vars for query */
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414 LDAP *ld;
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415 LDAPMessage *res, *e;
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416 BerElement *ptr;
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417 char *a;
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418 int i, rc, err;
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419
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420 char **vals = NULL;
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421 int matches;
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422
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423 int ldap_scope = LDAP_SCOPE_SUBTREE;
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424 char **ldap_attributes = NULL;
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425
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426 Lisp_Object list, entry, result;
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427 struct gcpro gcpro1, gcpro2, gcpro3;
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428
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429 list = entry = result = Qnil;
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430 GCPRO3(list, entry, result);
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431
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432 /* Do all the parameter checking */
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433 CHECK_LIVE_LDAP (ldap);
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434 ld = (XLDAP (ldap))->ld;
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435
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436 /* Filter */
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437 CHECK_STRING (filter);
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438
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439 /* Search base */
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440 if (NILP (base))
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441 {
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442 base = Vldap_default_base;
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443 }
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444 if (!NILP (base))
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445 {
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446 CHECK_STRING (Vldap_default_base);
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447 }
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448
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449 /* Search scope */
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450 if (!NILP (scope))
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451 {
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452 CHECK_SYMBOL (scope);
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453 if (EQ (scope, Qbase))
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454 ldap_scope = LDAP_SCOPE_BASE;
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455 else if (EQ (scope, Qonelevel))
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456 ldap_scope = LDAP_SCOPE_ONELEVEL;
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457 else if (EQ (scope, Qsubtree))
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458 ldap_scope = LDAP_SCOPE_SUBTREE;
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459 else
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460 signal_simple_error ("Invalid scope", scope);
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461 }
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462
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|
463 /* Attributes to search */
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464 if (!NILP (attrs))
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|
465 {
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466 Lisp_Object attr_left = attrs;
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|
|
467 struct gcpro ngcpro1;
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|
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468
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|
|
469 NGCPRO1 (attr_left);
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|
|
470 CHECK_CONS (attrs);
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471
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472 ldap_attributes = alloca ((XINT (Flength (attrs)) + 1)*sizeof (char *));
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|
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473
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474 for (i=0; !NILP (attr_left); i++) {
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|
|
475 CHECK_STRING (XCAR (attr_left));
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|
|
476 ldap_attributes[i] = alloca (XSTRING_LENGTH (XCAR (attr_left)) + 1);
|
|
|
477 strcpy(ldap_attributes[i],
|
|
|
478 (char *)(XSTRING_DATA( XCAR (attr_left))));
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|
|
479 attr_left = XCDR (attr_left);
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|
|
480 }
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|
|
481 ldap_attributes[i] = NULL;
|
|
|
482 NUNGCPRO;
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|
|
483 }
|
|
|
484
|
|
|
485 /* Attributes only ? */
|
|
|
486 CHECK_SYMBOL (attrsonly);
|
|
|
487
|
|
|
488
|
|
|
489 /* Perform the search */
|
|
|
490 if (ldap_search (ld,
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|
|
491 NILP (base) ? "" : (char *) XSTRING_DATA (base),
|
|
|
492 ldap_scope,
|
|
|
493 NILP (filter) ? "" : (char *) XSTRING_DATA (filter),
|
|
|
494 ldap_attributes,
|
|
|
495 NILP (attrsonly) ? 0 : 1)
|
|
|
496 == -1)
|
|
|
497 {
|
|
|
498 signal_ldap_error (ld);
|
|
259
|
499 }
|
|
|
500
|
|
|
501 /* Build the results list */
|
|
|
502 matches = 0;
|
|
|
503
|
|
276
|
504 /* ldap_result calls select() and can get wedged by EINTR signals */
|
|
|
505 slow_down_interrupts ();
|
|
|
506 rc = ldap_result (ld, LDAP_RES_ANY, 0, NULL, &res);
|
|
|
507 speed_up_interrupts ();
|
|
|
508 while ( rc == LDAP_RES_SEARCH_ENTRY )
|
|
259
|
509 {
|
|
|
510 matches ++;
|
|
|
511 e = ldap_first_entry (ld, res);
|
|
|
512 message ("Parsing results... %d", matches);
|
|
|
513 entry = Qnil;
|
|
|
514 for (a= ldap_first_attribute (ld, e, &ptr);
|
|
|
515 a != NULL;
|
|
|
516 a= ldap_next_attribute (ld, e, ptr) )
|
|
|
517 {
|
|
|
518 list = Fcons (build_string (a), Qnil);
|
|
|
519 vals = ldap_get_values (ld, e, a);
|
|
|
520 if (vals != NULL)
|
|
|
521 {
|
|
|
522 for (i=0; vals[i]!=NULL; i++)
|
|
|
523 {
|
|
|
524 list = Fcons (build_string (vals[i]),
|
|
|
525 list);
|
|
|
526 }
|
|
|
527 }
|
|
|
528 entry = Fcons (Fnreverse (list),
|
|
|
529 entry);
|
|
|
530 ldap_value_free (vals);
|
|
|
531 }
|
|
|
532 result = Fcons (Fnreverse (entry),
|
|
|
533 result);
|
|
|
534 ldap_msgfree (res);
|
|
276
|
535
|
|
|
536 slow_down_interrupts ();
|
|
|
537 rc = ldap_result (ld, LDAP_RES_ANY, 0, NULL, &res);
|
|
|
538 speed_up_interrupts ();
|
|
259
|
539 }
|
|
|
540
|
|
|
541 if (rc == -1)
|
|
|
542 {
|
|
276
|
543 signal_ldap_error (ld);
|
|
259
|
544 }
|
|
|
545
|
|
|
546 if ((rc = ldap_result2error (ld, res, 0)) != LDAP_SUCCESS)
|
|
|
547 {
|
|
276
|
548 signal_ldap_error (ld);
|
|
259
|
549 }
|
|
|
550
|
|
|
551 ldap_msgfree (res);
|
|
|
552 message ("Done.");
|
|
|
553
|
|
|
554 result = Fnreverse (result);
|
|
|
555 clear_message ();
|
|
|
556
|
|
|
557 UNGCPRO;
|
|
|
558 return result;
|
|
|
559 }
|
|
|
560
|
|
|
561
|
|
|
562 void
|
|
|
563 syms_of_eldap (void)
|
|
|
564 {
|
|
276
|
565 defsymbol (&Qldapp, "ldapp");
|
|
259
|
566
|
|
276
|
567 DEFSUBR (Fldapp);
|
|
|
568 DEFSUBR (Fldap_host);
|
|
|
569 DEFSUBR (Fldap_status);
|
|
|
570 DEFSUBR (Fldap_open);
|
|
|
571 DEFSUBR (Fldap_close);
|
|
|
572 DEFSUBR (Fldap_search_internal);
|
|
259
|
573 }
|
|
|
574
|
|
|
575 void
|
|
|
576 vars_of_eldap (void)
|
|
|
577 {
|
|
276
|
578 Fprovide (intern ("ldap"));
|
|
259
|
579
|
|
276
|
580 ldap_default_port = LDAP_PORT;
|
|
|
581 Vldap_default_base = Qnil;
|
|
|
582
|
|
|
583 DEFVAR_INT ("ldap-default-port", &ldap_default_port /*
|
|
|
584 Default TCP port for LDAP connections.
|
|
|
585 Initialized from the LDAP library. Default value is 389.
|
|
259
|
586 */ );
|
|
|
587
|
|
|
588 DEFVAR_LISP ("ldap-default-base", &Vldap_default_base /*
|
|
|
589 Default base for LDAP searches.
|
|
|
590 This is a string using the syntax of RFC 1779.
|
|
|
591 For instance, "o=ACME, c=US" limits the search to the
|
|
|
592 Acme organization in the United States.
|
|
|
593 */ );
|
|
|
594
|
|
|
595 }
|
|
276
|
596
|
|
|
597
|
