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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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278
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34 #include "opaque.h"
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259
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35
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265
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36 #include <errno.h>
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259
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37 #include <lber.h>
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38 #include <ldap.h>
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39
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276
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40 #include "eldap.h"
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41
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259
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42 #ifdef HAVE_NS_LDAP
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43 #define HAVE_LDAP_SET_OPTION 1
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44 #define HAVE_LDAP_GET_ERRNO 1
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45 #else
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46 #undef HAVE_LDAP_SET_OPTION
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47 #undef HAVE_LDAP_GET_ERRNO
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48 #endif
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49
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276
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50
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259
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51
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276
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52 static int ldap_default_port;
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53 static Lisp_Object Vldap_default_base;
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54
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55 /* ldap-open plist keywords */
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56 static Lisp_Object Qport, Qauth, Qbinddn, Qpasswd, Qderef, Qtimelimit,
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57 Qsizelimit;
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259
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58 /* Search scope limits */
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59 static Lisp_Object Qbase, Qonelevel, Qsubtree;
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60 /* Authentication methods */
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61 #ifdef LDAP_AUTH_KRBV41
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62 static Lisp_Object Qkrbv41;
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63 #endif
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64 #ifdef LDAP_AUTH_KRBV42
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65 static Lisp_Object Qkrbv42;
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66 #endif
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67 /* Deref policy */
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261
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68 static Lisp_Object Qnever, Qalways, Qfind;
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259
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69
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276
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70 static Lisp_Object Qldapp;
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71
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72
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73 /************************************************************************/
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74 /* Utility Functions */
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75 /************************************************************************/
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76
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77 static void
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78 signal_ldap_error (LDAP *ld)
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79 {
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80 #if HAVE_LDAP_GET_ERRNO
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81 signal_simple_error
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82 ("LDAP error",
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83 build_string (ldap_err2string (ldap_get_lderrno (ld, NULL, NULL))));
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84 #else
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85 signal_simple_error ("LDAP error",
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86 build_string (ldap_err2string (ld->ld_errno)));
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87 #endif
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88 }
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89
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90
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91 /************************************************************************/
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92 /* The ldap Lisp object */
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93 /************************************************************************/
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94
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95 /*
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96 * Structure records pertinent information about an open LDAP connection.
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97 */
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98
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99 struct Lisp_LDAP
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100 {
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101 /* lcrecord header */
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102 struct lcrecord_header header;
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103 /* The LDAP connection handle used by the LDAP API */
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104 LDAP *ld;
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105 /* Name of the host we connected to */
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106 Lisp_Object host;
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107 /* Status of the LDAP connection.
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108 This is a symbol: open or closed */
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109 Lisp_Object status_symbol;
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110 };
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111
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112
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113
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114 static Lisp_Object
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115 mark_ldap (Lisp_Object obj, void (*markobj) (Lisp_Object))
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116 {
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117 struct Lisp_LDAP *ldap = XLDAP (obj);
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118 ((markobj) (ldap->host));
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119 return ldap->status_symbol;
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120 }
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121
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122 static void
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123 print_ldap (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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124 {
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125 char buf[16];
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126
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127 struct Lisp_LDAP *ldap = XLDAP (obj);
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128
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129 if (print_readably)
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130 error ("printing unreadable object #<ldap %s>",
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131 XSTRING_DATA (ldap->host));
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132
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278
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133 write_c_string ("#<ldap ", printcharfun);
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134 print_internal (ldap->host, printcharfun, 1);
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135 write_c_string (" state:",printcharfun);
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136 print_internal (ldap->status_symbol, printcharfun, 1);
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137 sprintf (buf, " 0x%x>", ldap);
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138 write_c_string (buf, printcharfun);
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276
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139 }
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140
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141 static struct Lisp_LDAP *
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142 allocate_ldap (void)
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143 {
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144 struct Lisp_LDAP *ldap =
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145 alloc_lcrecord_type (struct Lisp_LDAP, lrecord_ldap);
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146
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147 ldap->ld = (LDAP *) NULL;
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148 ldap->host = Qnil;
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149 ldap->status_symbol = Qnil;
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150 return ldap;
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151 }
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152
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153 DEFINE_LRECORD_IMPLEMENTATION ("ldap", ldap,
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154 mark_ldap, print_ldap, NULL,
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155 NULL, NULL, struct Lisp_LDAP);
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156
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157
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158
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159
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160 /************************************************************************/
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161 /* Basic ldap accessors */
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162 /************************************************************************/
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163
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164 DEFUN ("ldapp", Fldapp, 1, 1, 0, /*
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165 Return t if OBJECT is a LDAP connection.
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166 */
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167 (object))
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168 {
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169 return LDAPP (object) ? Qt : Qnil;
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170 }
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171
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172
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173 DEFUN ("ldap-host", Fldap_host, 1, 1, 0, /*
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174 Return the server host of the connection LDAP, as a string.
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175 */
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176 (ldap))
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177 {
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178 CHECK_LDAP (ldap);
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179 return (XLDAP (ldap))->host;
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180 }
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181
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182
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183
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184 DEFUN ("ldap-status", Fldap_status, 1, 1, 0, /*
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185 Return the status of the connection LDAP.
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186 This is a symbol, one of these:
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187
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188 open -- for a LDAP connection that is open.
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189 closed -- for a LDAP connection that is closed.
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190 */
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191 (ldap))
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192 {
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193 CHECK_LDAP (ldap);
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194 return (XLDAP (ldap))->status_symbol;
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195 }
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196
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197
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198
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199 /************************************************************************/
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200 /* Opening/Closing a LDAP connection */
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201 /************************************************************************/
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202
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203
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204 DEFUN ("ldap-open", Fldap_open, 1, 2, 0, /*
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205 Open a LDAP connection to HOST.
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206 PLIST is a plist containing additional parameters for the connection.
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259
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207 Valid keys in that list are:
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276
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208 `port' the TCP port to use for the connection if different from
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209 `ldap-default-port'.
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259
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210 `auth' is the authentication method to use, possible values depend on
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211 the LDAP library XEmacs was compiled with: `simple', `krbv41' and `krbv42'.
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212 `binddn' is the distinguished name of the user to bind as (in RFC 1779 syntax).
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213 `passwd' is the password to use for simple authentication.
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214 `deref' is one of the symbols `never', `always', `search' or `find'.
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215 `timelimit' is the timeout limit for the connection in seconds.
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216 `sizelimit' is the maximum number of matches to return.
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217 */
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276
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218 (host, plist))
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259
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219 {
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276
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220 /* This function can call lisp */
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259
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221
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276
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222 struct Lisp_LDAP *lisp_ldap;
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259
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223 LDAP *ld;
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278
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224 int ldap_port = 0;
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259
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225 int ldap_auth = LDAP_AUTH_SIMPLE;
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226 char *ldap_binddn = NULL;
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227 char *ldap_passwd = NULL;
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228 int ldap_deref = LDAP_DEREF_NEVER;
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229 int ldap_timelimit = 0;
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230 int ldap_sizelimit = 0;
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278
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231 int err;
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259
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232
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276
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233 Lisp_Object ldap, list, keyword, value;
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234 struct gcpro gcpro1;
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259
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235
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276
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236 ldap = Qnil;
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237 GCPRO1 (ldap);
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259
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238
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276
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239 CHECK_STRING (host);
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240
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241 EXTERNAL_PROPERTY_LIST_LOOP(list, keyword, value, plist)
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242 {
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243 /* TCP Port */
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244 if (EQ (keyword, Qport))
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259
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245 {
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276
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246 CHECK_INT (value);
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247 ldap_port = XINT (value);
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259
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248 }
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249 /* Authentication method */
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276
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250 if (EQ (keyword, Qauth))
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259
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251 {
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252 CHECK_SYMBOL (value);
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253
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254 if (EQ (value, Qsimple))
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255 ldap_auth = LDAP_AUTH_SIMPLE;
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256 #ifdef LDAP_AUTH_KRBV41
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257 else if (EQ (value, Qkrbv41))
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258 ldap_auth = LDAP_AUTH_KRBV41;
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259 #endif
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260 #ifdef LDAP_AUTH_KRBV42
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261 else if (EQ (value, Qkrbv42))
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262 ldap_auth = LDAP_AUTH_KRBV42;
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263 #endif
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264 else
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265 signal_simple_error ("Invalid authentication method", value);
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266 }
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267 /* Bind DN */
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268 else if (EQ (keyword, Qbinddn))
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269 {
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276
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270 CHECK_STRING (value);
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271 ldap_binddn = alloca (XSTRING_LENGTH (value) + 1);
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272 strcpy (ldap_binddn, (char *)XSTRING_DATA (value));
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259
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273 }
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274 /* Password */
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275 else if (EQ (keyword, Qpasswd))
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276 {
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276
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277 CHECK_STRING (value);
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278 ldap_passwd = alloca (XSTRING_LENGTH (value) + 1);
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279 strcpy (ldap_passwd, (char *)XSTRING_DATA (value));
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259
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280 }
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281 /* Deref */
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282 else if (EQ (keyword, Qderef))
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283 {
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284 CHECK_SYMBOL (value);
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285 if (EQ (value, Qnever))
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286 ldap_deref = LDAP_DEREF_NEVER;
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287 else if (EQ (value, Qsearch))
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288 ldap_deref = LDAP_DEREF_SEARCHING;
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289 else if (EQ (value, Qfind))
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290 ldap_deref = LDAP_DEREF_FINDING;
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291 else if (EQ (value, Qalways))
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292 ldap_deref = LDAP_DEREF_ALWAYS;
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293 else
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294 signal_simple_error ("Invalid deref value", value);
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295 }
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296 /* Timelimit */
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297 else if (EQ (keyword, Qtimelimit))
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298 {
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276
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299 CHECK_INT (value);
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300 ldap_timelimit = XINT (value);
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259
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301 }
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302 /* Sizelimit */
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303 else if (EQ (keyword, Qsizelimit))
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304 {
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276
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305 CHECK_INT (value);
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306 ldap_sizelimit = XINT (value);
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259
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307 }
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308 }
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309
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276
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310 if (ldap_port == 0)
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259
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311 {
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276
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312 ldap_port = ldap_default_port;
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259
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313 }
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314
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276
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315 /* Connect to the server and bind */
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316 ld = ldap_open ((char *)XSTRING_DATA (host), ldap_port);
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317 if (ld == NULL )
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318 signal_simple_error_2 ("Failed connecting to host",
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319 host,
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320 lisp_strerror (errno));
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259
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321
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322
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323 #if HAVE_LDAP_SET_OPTION
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324 if (ldap_set_option (ld, LDAP_OPT_DEREF, (void *)&ldap_deref) != LDAP_SUCCESS)
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276
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325 signal_ldap_error (ld);
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326 if (ldap_set_option (ld, LDAP_OPT_TIMELIMIT,
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327 (void *)&ldap_timelimit) != LDAP_SUCCESS)
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328 signal_ldap_error (ld);
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329 if (ldap_set_option (ld, LDAP_OPT_SIZELIMIT,
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330 (void *)&ldap_sizelimit) != LDAP_SUCCESS)
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331 signal_ldap_error (ld);
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259
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332 if (ldap_set_option (ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON) != LDAP_SUCCESS)
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276
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333 signal_ldap_error (ld);
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259
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334 #else /* HAVE_LDAP_SET_OPTION */
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335 ld->ld_deref = ldap_deref;
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336 ld->ld_timelimit = ldap_timelimit;
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337 ld->ld_sizelimit = ldap_sizelimit;
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338 #ifdef LDAP_REFERRALS
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339 ld->ld_options = LDAP_OPT_REFERRALS;
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340 #else /* LDAP_REFERRALS */
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341 ld->ld_options = 0;
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342 #endif /* LDAP_REFERRALS */
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343 #endif /* HAVE_LDAP_SET_OPTION */
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344
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276
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345 /* ldap_bind_s calls select and may be wedged by spurious signals */
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346 slow_down_interrupts ();
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347 err = ldap_bind_s (ld, ldap_binddn, ldap_passwd, ldap_auth);
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348 speed_up_interrupts ();
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349 if (err != LDAP_SUCCESS)
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259
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350 signal_simple_error ("Failed binding to the server",
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351 build_string (ldap_err2string (err)));
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352
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276
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353 lisp_ldap = allocate_ldap ();
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354 lisp_ldap->ld = ld;
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355 lisp_ldap->host = host;
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356 lisp_ldap->status_symbol = Qopen;
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357 XSETLDAP (ldap,lisp_ldap);
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358
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359 UNGCPRO;
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360 return ldap;
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361 }
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362
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363
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364
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365 DEFUN ("ldap-close", Fldap_close, 1, 1, 0, /*
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366 Close an LDAP connection.
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367 Return t if the connection was actually closed or nil if
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368 it was already closed before the call
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369 */
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370 (ldap))
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371 {
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|
372 CHECK_LDAP (ldap);
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373 if ( EQ ((XLDAP (ldap))->status_symbol, Qopen) )
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259
|
374 {
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276
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375 ldap_unbind ((XLDAP (ldap))->ld);
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|
376 (XLDAP (ldap))->status_symbol = Qclosed;
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377 return Qt;
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|
|
378 }
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|
379 return Qnil;
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|
|
380 }
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|
|
381
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|
|
382
|
|
|
383
|
|
|
384 /************************************************************************/
|
|
|
385 /* Working on a LDAP connection */
|
|
|
386 /************************************************************************/
|
|
278
|
387 struct ldap_unwind_struct
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|
|
388 {
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|
|
389 LDAPMessage *res;
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|
|
390 char **vals;
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|
|
391 };
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|
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392
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|
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393
|
|
|
394 static Lisp_Object
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|
395 ldap_search_unwind (Lisp_Object unwind_obj)
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|
|
396 {
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|
|
397 struct ldap_unwind_struct *unwind =
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|
398 (struct ldap_unwind_struct *) get_opaque_ptr (unwind_obj);
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|
|
399 if (unwind->res != (LDAPMessage *)NULL)
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|
|
400 ldap_msgfree (unwind->res);
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|
|
401 if (unwind->vals != (char **)NULL)
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|
|
402 ldap_value_free (unwind->vals);
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|
|
403 }
|
|
276
|
404
|
|
|
405 DEFUN ("ldap-search-internal", Fldap_search_internal, 2, 6, 0, /*
|
|
|
406 Perform a search on an open LDAP connection.
|
|
|
407 LDAP is an LDAP connection object created with `ldap-open'.
|
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|
408 FILTER is a filter string for the search as described in RFC 1558
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409 BASE is the distinguished name at which to start the search
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410 SCOPE is an integer or a symbol indicating the scope of the search
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411 Possible values are `ldap-scope-base', `ldap-scope-onelevel' or
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412 `ldap-scope-subtree'
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413 ATTRS is a list of strings indicating which attributes to retrieve
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414 for each matching entry. If nil return all available attributes.
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415 If ATTRSONLY is non-nil then only the attributes are retrieved, not
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416 the associated values
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417 The function returns a list of matching entries. Each entry is itself
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418 an alist of attribute/values.
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419 */
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420 (ldap, filter, base, scope, attrs, attrsonly))
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421 {
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422 /* This function can call lisp */
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423
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424 /* Vars for query */
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425 LDAP *ld;
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278
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426 LDAPMessage *e;
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276
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427 BerElement *ptr;
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428 char *a;
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429 int i, rc, err;
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430 int matches;
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278
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431 struct ldap_unwind_struct unwind;
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276
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432
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433 int ldap_scope = LDAP_SCOPE_SUBTREE;
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434 char **ldap_attributes = NULL;
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435
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278
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436 int speccount = specpdl_depth ();
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437
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276
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438 Lisp_Object list, entry, result;
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439 struct gcpro gcpro1, gcpro2, gcpro3;
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440
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441 list = entry = result = Qnil;
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442 GCPRO3(list, entry, result);
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443
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278
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444 unwind.res = (LDAPMessage *)NULL;
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445 unwind.vals = (char **)NULL;
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446
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276
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447 /* Do all the parameter checking */
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448 CHECK_LIVE_LDAP (ldap);
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449 ld = (XLDAP (ldap))->ld;
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450
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451 /* Filter */
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452 CHECK_STRING (filter);
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453
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454 /* Search base */
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455 if (NILP (base))
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456 {
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457 base = Vldap_default_base;
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458 }
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459 if (!NILP (base))
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460 {
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461 CHECK_STRING (Vldap_default_base);
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462 }
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463
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464 /* Search scope */
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465 if (!NILP (scope))
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466 {
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467 CHECK_SYMBOL (scope);
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468 if (EQ (scope, Qbase))
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469 ldap_scope = LDAP_SCOPE_BASE;
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470 else if (EQ (scope, Qonelevel))
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471 ldap_scope = LDAP_SCOPE_ONELEVEL;
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472 else if (EQ (scope, Qsubtree))
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473 ldap_scope = LDAP_SCOPE_SUBTREE;
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474 else
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|
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475 signal_simple_error ("Invalid scope", scope);
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476 }
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477
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|
478 /* Attributes to search */
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479 if (!NILP (attrs))
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480 {
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|
|
481 CHECK_CONS (attrs);
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278
|
482 ldap_attributes = alloca_array (char *, 1 + XINT (Flength (attrs)));
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|
276
|
483
|
|
278
|
484 i = 0;
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|
|
485 EXTERNAL_LIST_LOOP (attrs, attrs)
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|
|
486 {
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|
|
487 Lisp_Object current = XCAR (attrs);
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|
|
488 CHECK_STRING (current);
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|
|
489 ldap_attributes[i] =
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|
|
490 alloca_array (char, 1 + XSTRING_LENGTH (current));
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|
|
491 memcpy (ldap_attributes[i],
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|
|
492 XSTRING_DATA (current), XSTRING_LENGTH (current));
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|
|
493 ++i;
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|
|
494 }
|
|
276
|
495 ldap_attributes[i] = NULL;
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|
|
496 }
|
|
|
497
|
|
|
498 /* Attributes only ? */
|
|
|
499 CHECK_SYMBOL (attrsonly);
|
|
|
500
|
|
|
501
|
|
|
502 /* Perform the search */
|
|
|
503 if (ldap_search (ld,
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|
|
504 NILP (base) ? "" : (char *) XSTRING_DATA (base),
|
|
|
505 ldap_scope,
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|
|
506 NILP (filter) ? "" : (char *) XSTRING_DATA (filter),
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|
|
507 ldap_attributes,
|
|
|
508 NILP (attrsonly) ? 0 : 1)
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|
|
509 == -1)
|
|
|
510 {
|
|
|
511 signal_ldap_error (ld);
|
|
259
|
512 }
|
|
|
513
|
|
278
|
514 /* Ensure we don't exit without cleaning up */
|
|
|
515 record_unwind_protect (ldap_search_unwind,
|
|
|
516 make_opaque_ptr (&unwind));
|
|
|
517
|
|
259
|
518 /* Build the results list */
|
|
|
519 matches = 0;
|
|
|
520
|
|
276
|
521 /* ldap_result calls select() and can get wedged by EINTR signals */
|
|
|
522 slow_down_interrupts ();
|
|
278
|
523 rc = ldap_result (ld, LDAP_RES_ANY, 0, NULL, &(unwind.res));
|
|
276
|
524 speed_up_interrupts ();
|
|
|
525 while ( rc == LDAP_RES_SEARCH_ENTRY )
|
|
259
|
526 {
|
|
278
|
527 QUIT;
|
|
259
|
528 matches ++;
|
|
278
|
529 e = ldap_first_entry (ld, unwind.res);
|
|
259
|
530 message ("Parsing results... %d", matches);
|
|
|
531 entry = Qnil;
|
|
|
532 for (a= ldap_first_attribute (ld, e, &ptr);
|
|
|
533 a != NULL;
|
|
|
534 a= ldap_next_attribute (ld, e, ptr) )
|
|
|
535 {
|
|
|
536 list = Fcons (build_string (a), Qnil);
|
|
278
|
537 unwind.vals = ldap_get_values (ld, e, a);
|
|
|
538 if (unwind.vals != NULL)
|
|
259
|
539 {
|
|
278
|
540 for (i=0; unwind.vals[i]!=NULL; i++)
|
|
259
|
541 {
|
|
278
|
542 list = Fcons (build_string (unwind.vals[i]),
|
|
259
|
543 list);
|
|
|
544 }
|
|
|
545 }
|
|
|
546 entry = Fcons (Fnreverse (list),
|
|
|
547 entry);
|
|
278
|
548 ldap_value_free (unwind.vals);
|
|
|
549 unwind.vals = (char **)NULL;
|
|
259
|
550 }
|
|
|
551 result = Fcons (Fnreverse (entry),
|
|
|
552 result);
|
|
278
|
553 ldap_msgfree (unwind.res);
|
|
|
554 unwind.res = (LDAPMessage *)NULL;
|
|
276
|
555
|
|
|
556 slow_down_interrupts ();
|
|
278
|
557 rc = ldap_result (ld, LDAP_RES_ANY, 0, NULL, &(unwind.res));
|
|
276
|
558 speed_up_interrupts ();
|
|
259
|
559 }
|
|
|
560
|
|
|
561 if (rc == -1)
|
|
|
562 {
|
|
276
|
563 signal_ldap_error (ld);
|
|
259
|
564 }
|
|
|
565
|
|
278
|
566 if ((rc = ldap_result2error (ld, unwind.res, 0)) != LDAP_SUCCESS)
|
|
259
|
567 {
|
|
276
|
568 signal_ldap_error (ld);
|
|
259
|
569 }
|
|
|
570
|
|
278
|
571 ldap_msgfree (unwind.res);
|
|
|
572 unwind.res = (LDAPMessage *)NULL;
|
|
259
|
573 message ("Done.");
|
|
|
574
|
|
|
575 result = Fnreverse (result);
|
|
|
576 clear_message ();
|
|
|
577
|
|
278
|
578 unbind_to (speccount, Qnil);
|
|
259
|
579 UNGCPRO;
|
|
|
580 return result;
|
|
|
581 }
|
|
|
582
|
|
|
583
|
|
|
584 void
|
|
|
585 syms_of_eldap (void)
|
|
|
586 {
|
|
276
|
587 defsymbol (&Qldapp, "ldapp");
|
|
259
|
588
|
|
276
|
589 DEFSUBR (Fldapp);
|
|
|
590 DEFSUBR (Fldap_host);
|
|
|
591 DEFSUBR (Fldap_status);
|
|
|
592 DEFSUBR (Fldap_open);
|
|
|
593 DEFSUBR (Fldap_close);
|
|
|
594 DEFSUBR (Fldap_search_internal);
|
|
259
|
595 }
|
|
|
596
|
|
|
597 void
|
|
|
598 vars_of_eldap (void)
|
|
|
599 {
|
|
276
|
600 Fprovide (intern ("ldap"));
|
|
259
|
601
|
|
276
|
602 ldap_default_port = LDAP_PORT;
|
|
|
603 Vldap_default_base = Qnil;
|
|
|
604
|
|
|
605 DEFVAR_INT ("ldap-default-port", &ldap_default_port /*
|
|
|
606 Default TCP port for LDAP connections.
|
|
|
607 Initialized from the LDAP library. Default value is 389.
|
|
259
|
608 */ );
|
|
|
609
|
|
|
610 DEFVAR_LISP ("ldap-default-base", &Vldap_default_base /*
|
|
|
611 Default base for LDAP searches.
|
|
|
612 This is a string using the syntax of RFC 1779.
|
|
|
613 For instance, "o=ACME, c=US" limits the search to the
|
|
|
614 Acme organization in the United States.
|
|
|
615 */ );
|
|
|
616
|
|
|
617 }
|
|
276
|
618
|
|
|
619
|
