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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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282
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23 /* Author: Oscar Figueiredo with lots of support from Hrvoje Niksic */
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259
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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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282
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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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259
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45 #else
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282
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46 # undef HAVE_LDAP_SET_OPTION
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47 # undef HAVE_LDAP_GET_ERRNO
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259
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48 #endif
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49
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276
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50 static int ldap_default_port;
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51 static Lisp_Object Vldap_default_base;
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52
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282
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53 /* Needed by the lrecord definition */
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54 Lisp_Object Qldapp;
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55
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276
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56 /* ldap-open plist keywords */
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280
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57 extern Lisp_Object Qport, Qauth, Qbinddn, Qpasswd, Qderef, Qtimelimit,
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276
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58 Qsizelimit;
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259
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59 /* Search scope limits */
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280
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60 extern Lisp_Object Qbase, Qonelevel, Qsubtree;
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259
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61 /* Authentication methods */
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282
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62 extern Lisp_Object Qkrbv41, Qkrbv42;
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259
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63 /* Deref policy */
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280
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64 extern Lisp_Object Qnever, Qalways, Qfind;
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276
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65
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66 /************************************************************************/
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67 /* Utility Functions */
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68 /************************************************************************/
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69
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70 static void
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71 signal_ldap_error (LDAP *ld)
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72 {
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282
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73 #ifdef HAVE_LDAP_GET_ERRNO
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276
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74 signal_simple_error
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75 ("LDAP error",
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76 build_string (ldap_err2string (ldap_get_lderrno (ld, NULL, NULL))));
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77 #else
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78 signal_simple_error ("LDAP error",
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79 build_string (ldap_err2string (ld->ld_errno)));
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80 #endif
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81 }
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82
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83
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84 /************************************************************************/
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85 /* The ldap Lisp object */
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86 /************************************************************************/
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87
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88 /*
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89 * Structure records pertinent information about an open LDAP connection.
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90 */
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91
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92 struct Lisp_LDAP
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93 {
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94 /* lcrecord header */
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95 struct lcrecord_header header;
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96 /* The LDAP connection handle used by the LDAP API */
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97 LDAP *ld;
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98 /* Name of the host we connected to */
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99 Lisp_Object host;
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282
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100 /* Status of the LDAP connection. */
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101 int livep;
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276
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102 };
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103
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104
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282
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105 static Lisp_Object
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106 make_ldap (struct Lisp_LDAP *ldap)
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107 {
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108 Lisp_Object lisp_ldap;
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109 XSETLDAP (lisp_ldap, ldap);
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110 return lisp_ldap;
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111 }
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276
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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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282
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116 return XLDAP (obj)->host;
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276
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117 }
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118
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119 static void
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120 print_ldap (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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121 {
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282
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122 char buf[32];
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276
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123
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124 struct Lisp_LDAP *ldap = XLDAP (obj);
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125
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126 if (print_readably)
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127 error ("printing unreadable object #<ldap %s>",
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128 XSTRING_DATA (ldap->host));
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129
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278
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130 write_c_string ("#<ldap ", printcharfun);
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131 print_internal (ldap->host, printcharfun, 1);
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282
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132 if (!ldap->livep)
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133 write_c_string ("(dead) ",printcharfun);
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278
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134 sprintf (buf, " 0x%x>", ldap);
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135 write_c_string (buf, printcharfun);
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276
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136 }
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137
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138 static struct Lisp_LDAP *
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139 allocate_ldap (void)
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140 {
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141 struct Lisp_LDAP *ldap =
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142 alloc_lcrecord_type (struct Lisp_LDAP, lrecord_ldap);
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143
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282
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144 ldap->ld = NULL;
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276
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145 ldap->host = Qnil;
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282
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146 ldap->livep = 0;
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276
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147 return ldap;
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148 }
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149
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280
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150 static void
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151 finalize_ldap (void *header, int for_disksave)
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152 {
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153 struct Lisp_LDAP *ldap = (struct Lisp_LDAP *) header;
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154
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155 if (for_disksave)
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282
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156 signal_simple_error ("Can't dump an emacs containing LDAP objects",
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157 make_ldap (ldap));
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158
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159 if (ldap->livep)
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280
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160 ldap_unbind (ldap->ld);
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161 }
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162
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276
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163 DEFINE_LRECORD_IMPLEMENTATION ("ldap", ldap,
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280
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164 mark_ldap, print_ldap, finalize_ldap,
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276
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165 NULL, NULL, struct Lisp_LDAP);
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166
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167
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168
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169
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170 /************************************************************************/
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171 /* Basic ldap accessors */
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172 /************************************************************************/
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173
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174 DEFUN ("ldapp", Fldapp, 1, 1, 0, /*
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175 Return t if OBJECT is a LDAP connection.
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176 */
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177 (object))
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178 {
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179 return LDAPP (object) ? Qt : Qnil;
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180 }
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181
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182 DEFUN ("ldap-host", Fldap_host, 1, 1, 0, /*
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183 Return the server host of the connection LDAP, as a string.
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184 */
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185 (ldap))
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186 {
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187 CHECK_LDAP (ldap);
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188 return (XLDAP (ldap))->host;
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189 }
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190
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282
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191 DEFUN ("ldap-live-p", Fldap_status, 1, 1, 0, /*
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192 Return t if LDAP is an active LDAP connection.
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276
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193 */
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194 (ldap))
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195 {
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196 CHECK_LDAP (ldap);
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282
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197 return (XLDAP (ldap))->livep ? Qt : Qnil;
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276
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198 }
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199
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200 /************************************************************************/
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201 /* Opening/Closing a LDAP connection */
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202 /************************************************************************/
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203
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204
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205 DEFUN ("ldap-open", Fldap_open, 1, 2, 0, /*
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206 Open a LDAP connection to HOST.
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207 PLIST is a plist containing additional parameters for the connection.
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259
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208 Valid keys in that list are:
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276
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209 `port' the TCP port to use for the connection if different from
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210 `ldap-default-port'.
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259
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211 `auth' is the authentication method to use, possible values depend on
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212 the LDAP library XEmacs was compiled with: `simple', `krbv41' and `krbv42'.
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213 `binddn' is the distinguished name of the user to bind as (in RFC 1779 syntax).
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214 `passwd' is the password to use for simple authentication.
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215 `deref' is one of the symbols `never', `always', `search' or `find'.
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216 `timelimit' is the timeout limit for the connection in seconds.
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217 `sizelimit' is the maximum number of matches to return.
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218 */
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276
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219 (host, plist))
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259
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220 {
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282
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221 /* This function can GC */
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222 struct Lisp_LDAP *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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282
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233 Lisp_Object list, keyword, value;
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259
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234
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276
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235 CHECK_STRING (host);
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236
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282
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237 EXTERNAL_PROPERTY_LIST_LOOP (list, keyword, value, plist)
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276
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238 {
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239 /* TCP Port */
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240 if (EQ (keyword, Qport))
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259
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241 {
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276
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242 CHECK_INT (value);
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243 ldap_port = XINT (value);
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259
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244 }
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245 /* Authentication method */
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276
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246 if (EQ (keyword, Qauth))
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259
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247 {
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248 if (EQ (value, Qsimple))
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249 ldap_auth = LDAP_AUTH_SIMPLE;
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250 #ifdef LDAP_AUTH_KRBV41
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251 else if (EQ (value, Qkrbv41))
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252 ldap_auth = LDAP_AUTH_KRBV41;
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253 #endif
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254 #ifdef LDAP_AUTH_KRBV42
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255 else if (EQ (value, Qkrbv42))
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256 ldap_auth = LDAP_AUTH_KRBV42;
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257 #endif
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258 else
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259 signal_simple_error ("Invalid authentication method", value);
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260 }
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261 /* Bind DN */
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262 else if (EQ (keyword, Qbinddn))
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263 {
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276
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264 CHECK_STRING (value);
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265 ldap_binddn = alloca (XSTRING_LENGTH (value) + 1);
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266 strcpy (ldap_binddn, (char *)XSTRING_DATA (value));
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259
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267 }
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268 /* Password */
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269 else if (EQ (keyword, Qpasswd))
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270 {
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276
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271 CHECK_STRING (value);
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272 ldap_passwd = alloca (XSTRING_LENGTH (value) + 1);
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273 strcpy (ldap_passwd, (char *)XSTRING_DATA (value));
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259
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274 }
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275 /* Deref */
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276 else if (EQ (keyword, Qderef))
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277 {
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278 if (EQ (value, Qnever))
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279 ldap_deref = LDAP_DEREF_NEVER;
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280 else if (EQ (value, Qsearch))
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281 ldap_deref = LDAP_DEREF_SEARCHING;
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282 else if (EQ (value, Qfind))
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283 ldap_deref = LDAP_DEREF_FINDING;
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284 else if (EQ (value, Qalways))
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285 ldap_deref = LDAP_DEREF_ALWAYS;
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286 else
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287 signal_simple_error ("Invalid deref value", value);
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288 }
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289 /* Timelimit */
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290 else if (EQ (keyword, Qtimelimit))
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291 {
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276
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292 CHECK_INT (value);
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293 ldap_timelimit = XINT (value);
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259
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294 }
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295 /* Sizelimit */
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296 else if (EQ (keyword, Qsizelimit))
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297 {
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276
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298 CHECK_INT (value);
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299 ldap_sizelimit = XINT (value);
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259
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300 }
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301 }
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302
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276
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303 if (ldap_port == 0)
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259
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304 {
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276
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305 ldap_port = ldap_default_port;
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259
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306 }
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307
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276
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308 /* Connect to the server and bind */
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309 ld = ldap_open ((char *)XSTRING_DATA (host), ldap_port);
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310 if (ld == NULL )
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311 signal_simple_error_2 ("Failed connecting to host",
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312 host,
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313 lisp_strerror (errno));
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259
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314
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315
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280
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316 #ifdef HAVE_LDAP_SET_OPTION
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259
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317 if (ldap_set_option (ld, LDAP_OPT_DEREF, (void *)&ldap_deref) != LDAP_SUCCESS)
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276
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318 signal_ldap_error (ld);
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319 if (ldap_set_option (ld, LDAP_OPT_TIMELIMIT,
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320 (void *)&ldap_timelimit) != LDAP_SUCCESS)
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321 signal_ldap_error (ld);
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322 if (ldap_set_option (ld, LDAP_OPT_SIZELIMIT,
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323 (void *)&ldap_sizelimit) != LDAP_SUCCESS)
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324 signal_ldap_error (ld);
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259
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325 if (ldap_set_option (ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON) != LDAP_SUCCESS)
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276
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326 signal_ldap_error (ld);
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280
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327 #else /* not HAVE_LDAP_SET_OPTION */
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259
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328 ld->ld_deref = ldap_deref;
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329 ld->ld_timelimit = ldap_timelimit;
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330 ld->ld_sizelimit = ldap_sizelimit;
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331 #ifdef LDAP_REFERRALS
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332 ld->ld_options = LDAP_OPT_REFERRALS;
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280
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333 #else /* not LDAP_REFERRALS */
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259
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334 ld->ld_options = 0;
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280
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335 #endif /* not LDAP_REFERRALS */
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336 #endif /* not HAVE_LDAP_SET_OPTION */
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259
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337
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282
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338 /* ldap_bind_s calls select and may be wedged by SIGIO. */
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276
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339 slow_down_interrupts ();
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340 err = ldap_bind_s (ld, ldap_binddn, ldap_passwd, ldap_auth);
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341 speed_up_interrupts ();
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342 if (err != LDAP_SUCCESS)
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259
|
343 signal_simple_error ("Failed binding to the server",
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344 build_string (ldap_err2string (err)));
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345
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282
|
346 ldap = allocate_ldap ();
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347 ldap->ld = ld;
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348 ldap->host = host;
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349 ldap->livep = 1;
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|
276
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350
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282
|
351 return make_ldap (ldap);
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|
276
|
352 }
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|
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353
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|
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354
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|
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355
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356 DEFUN ("ldap-close", Fldap_close, 1, 1, 0, /*
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357 Close an LDAP connection.
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358 */
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|
359 (ldap))
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|
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360 {
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280
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361 struct Lisp_LDAP *lldap;
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|
362 CHECK_LIVE_LDAP (ldap);
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363 lldap = XLDAP (ldap);
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|
364 ldap_unbind (lldap->ld);
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282
|
365 lldap->livep = 0;
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276
|
366 return Qnil;
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|
|
367 }
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|
|
368
|
|
|
369
|
|
|
370
|
|
|
371 /************************************************************************/
|
|
|
372 /* Working on a LDAP connection */
|
|
|
373 /************************************************************************/
|
|
278
|
374 struct ldap_unwind_struct
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|
|
375 {
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|
|
376 LDAPMessage *res;
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|
|
377 char **vals;
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|
378 };
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|
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379
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|
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380
|
|
|
381 static Lisp_Object
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382 ldap_search_unwind (Lisp_Object unwind_obj)
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|
|
383 {
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|
|
384 struct ldap_unwind_struct *unwind =
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|
|
385 (struct ldap_unwind_struct *) get_opaque_ptr (unwind_obj);
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|
282
|
386 if (unwind->res)
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|
278
|
387 ldap_msgfree (unwind->res);
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|
282
|
388 if (unwind->vals)
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|
278
|
389 ldap_value_free (unwind->vals);
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|
|
390 }
|
|
276
|
391
|
|
|
392 DEFUN ("ldap-search-internal", Fldap_search_internal, 2, 6, 0, /*
|
|
|
393 Perform a search on an open LDAP connection.
|
|
|
394 LDAP is an LDAP connection object created with `ldap-open'.
|
|
|
395 FILTER is a filter string for the search as described in RFC 1558
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|
|
396 BASE is the distinguished name at which to start the search
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397 SCOPE is an integer or a symbol indicating the scope of the search
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398 Possible values are `ldap-scope-base', `ldap-scope-onelevel' or
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399 `ldap-scope-subtree'
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400 ATTRS is a list of strings indicating which attributes to retrieve
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401 for each matching entry. If nil return all available attributes.
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402 If ATTRSONLY is non-nil then only the attributes are retrieved, not
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403 the associated values
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404 The function returns a list of matching entries. Each entry is itself
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405 an alist of attribute/values.
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406 */
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407 (ldap, filter, base, scope, attrs, attrsonly))
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408 {
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282
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409 /* This function can GC */
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276
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410
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411 /* Vars for query */
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412 LDAP *ld;
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278
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413 LDAPMessage *e;
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276
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414 BerElement *ptr;
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415 char *a;
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416 int i, rc, err;
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417 int matches;
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278
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418 struct ldap_unwind_struct unwind;
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276
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419
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420 int ldap_scope = LDAP_SCOPE_SUBTREE;
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421 char **ldap_attributes = NULL;
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422
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278
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423 int speccount = specpdl_depth ();
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424
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276
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425 Lisp_Object list, entry, result;
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426 struct gcpro gcpro1, gcpro2, gcpro3;
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427
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428 list = entry = result = Qnil;
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282
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429 GCPRO3 (list, entry, result);
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276
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430
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282
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431 unwind.res = NULL;
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432 unwind.vals = NULL;
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278
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433
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276
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434 /* Do all the parameter checking */
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435 CHECK_LIVE_LDAP (ldap);
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282
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436 ld = XLDAP (ldap)->ld;
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276
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437
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438 /* Filter */
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439 CHECK_STRING (filter);
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440
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441 /* Search base */
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442 if (NILP (base))
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443 {
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444 base = Vldap_default_base;
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445 }
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|
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446 if (!NILP (base))
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447 {
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448 CHECK_STRING (Vldap_default_base);
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449 }
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450
|
|
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451 /* Search scope */
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|
|
452 if (!NILP (scope))
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|
|
453 {
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454 if (EQ (scope, Qbase))
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|
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455 ldap_scope = LDAP_SCOPE_BASE;
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456 else if (EQ (scope, Qonelevel))
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457 ldap_scope = LDAP_SCOPE_ONELEVEL;
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|
|
458 else if (EQ (scope, Qsubtree))
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|
|
459 ldap_scope = LDAP_SCOPE_SUBTREE;
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|
|
460 else
|
|
|
461 signal_simple_error ("Invalid scope", scope);
|
|
|
462 }
|
|
|
463
|
|
|
464 /* Attributes to search */
|
|
|
465 if (!NILP (attrs))
|
|
|
466 {
|
|
|
467 CHECK_CONS (attrs);
|
|
278
|
468 ldap_attributes = alloca_array (char *, 1 + XINT (Flength (attrs)));
|
|
276
|
469
|
|
278
|
470 i = 0;
|
|
|
471 EXTERNAL_LIST_LOOP (attrs, attrs)
|
|
|
472 {
|
|
|
473 Lisp_Object current = XCAR (attrs);
|
|
|
474 CHECK_STRING (current);
|
|
|
475 ldap_attributes[i] =
|
|
|
476 alloca_array (char, 1 + XSTRING_LENGTH (current));
|
|
|
477 memcpy (ldap_attributes[i],
|
|
|
478 XSTRING_DATA (current), XSTRING_LENGTH (current));
|
|
|
479 ++i;
|
|
|
480 }
|
|
276
|
481 ldap_attributes[i] = NULL;
|
|
|
482 }
|
|
|
483
|
|
|
484 /* Attributes only ? */
|
|
|
485 CHECK_SYMBOL (attrsonly);
|
|
|
486
|
|
|
487 /* Perform the search */
|
|
|
488 if (ldap_search (ld,
|
|
|
489 NILP (base) ? "" : (char *) XSTRING_DATA (base),
|
|
|
490 ldap_scope,
|
|
|
491 NILP (filter) ? "" : (char *) XSTRING_DATA (filter),
|
|
|
492 ldap_attributes,
|
|
|
493 NILP (attrsonly) ? 0 : 1)
|
|
|
494 == -1)
|
|
|
495 {
|
|
|
496 signal_ldap_error (ld);
|
|
259
|
497 }
|
|
|
498
|
|
278
|
499 /* Ensure we don't exit without cleaning up */
|
|
|
500 record_unwind_protect (ldap_search_unwind,
|
|
|
501 make_opaque_ptr (&unwind));
|
|
|
502
|
|
259
|
503 /* Build the results list */
|
|
|
504 matches = 0;
|
|
|
505
|
|
276
|
506 /* ldap_result calls select() and can get wedged by EINTR signals */
|
|
|
507 slow_down_interrupts ();
|
|
282
|
508 rc = ldap_result (ld, LDAP_RES_ANY, 0, NULL, &unwind.res);
|
|
276
|
509 speed_up_interrupts ();
|
|
282
|
510 while (rc == LDAP_RES_SEARCH_ENTRY)
|
|
259
|
511 {
|
|
278
|
512 QUIT;
|
|
259
|
513 matches ++;
|
|
278
|
514 e = ldap_first_entry (ld, unwind.res);
|
|
282
|
515 /* #### This call to message() is pretty fascist, because it
|
|
|
516 destroys the current echo area contents, even when invoked
|
|
|
517 from Lisp. It should use echo_area_message() instead, and
|
|
|
518 restore the old echo area contents later. */
|
|
|
519 message ("Parsing ldap results... %d", matches);
|
|
259
|
520 entry = Qnil;
|
|
|
521 for (a= ldap_first_attribute (ld, e, &ptr);
|
|
|
522 a != NULL;
|
|
|
523 a= ldap_next_attribute (ld, e, ptr) )
|
|
|
524 {
|
|
|
525 list = Fcons (build_string (a), Qnil);
|
|
278
|
526 unwind.vals = ldap_get_values (ld, e, a);
|
|
|
527 if (unwind.vals != NULL)
|
|
259
|
528 {
|
|
282
|
529 for (i = 0; unwind.vals[i] != NULL; i++)
|
|
259
|
530 {
|
|
278
|
531 list = Fcons (build_string (unwind.vals[i]),
|
|
259
|
532 list);
|
|
|
533 }
|
|
|
534 }
|
|
|
535 entry = Fcons (Fnreverse (list),
|
|
|
536 entry);
|
|
278
|
537 ldap_value_free (unwind.vals);
|
|
282
|
538 unwind.vals = NULL;
|
|
259
|
539 }
|
|
|
540 result = Fcons (Fnreverse (entry),
|
|
|
541 result);
|
|
278
|
542 ldap_msgfree (unwind.res);
|
|
282
|
543 unwind.res = NULL;
|
|
276
|
544
|
|
|
545 slow_down_interrupts ();
|
|
278
|
546 rc = ldap_result (ld, LDAP_RES_ANY, 0, NULL, &(unwind.res));
|
|
276
|
547 speed_up_interrupts ();
|
|
259
|
548 }
|
|
|
549
|
|
|
550 if (rc == -1)
|
|
|
551 {
|
|
276
|
552 signal_ldap_error (ld);
|
|
259
|
553 }
|
|
280
|
554 rc = ldap_result2error (ld, unwind.res, 0);
|
|
|
555 if ((rc != LDAP_SUCCESS) &&
|
|
|
556 (rc != LDAP_SIZELIMIT_EXCEEDED))
|
|
259
|
557 {
|
|
276
|
558 signal_ldap_error (ld);
|
|
259
|
559 }
|
|
|
560
|
|
278
|
561 ldap_msgfree (unwind.res);
|
|
|
562 unwind.res = (LDAPMessage *)NULL;
|
|
282
|
563 /* #### See above for calling message(). */
|
|
|
564 message ("Parsing ldap results... done");
|
|
259
|
565
|
|
278
|
566 unbind_to (speccount, Qnil);
|
|
259
|
567 UNGCPRO;
|
|
282
|
568 return Fnreverse (result);
|
|
259
|
569 }
|
|
|
570
|
|
|
571
|
|
|
572 void
|
|
|
573 syms_of_eldap (void)
|
|
|
574 {
|
|
276
|
575 defsymbol (&Qldapp, "ldapp");
|
|
|
576 DEFSUBR (Fldapp);
|
|
|
577 DEFSUBR (Fldap_host);
|
|
|
578 DEFSUBR (Fldap_status);
|
|
|
579 DEFSUBR (Fldap_open);
|
|
|
580 DEFSUBR (Fldap_close);
|
|
|
581 DEFSUBR (Fldap_search_internal);
|
|
259
|
582 }
|
|
|
583
|
|
|
584 void
|
|
|
585 vars_of_eldap (void)
|
|
|
586 {
|
|
276
|
587 Fprovide (intern ("ldap"));
|
|
259
|
588
|
|
276
|
589 ldap_default_port = LDAP_PORT;
|
|
|
590 Vldap_default_base = Qnil;
|
|
|
591
|
|
|
592 DEFVAR_INT ("ldap-default-port", &ldap_default_port /*
|
|
|
593 Default TCP port for LDAP connections.
|
|
|
594 Initialized from the LDAP library. Default value is 389.
|
|
259
|
595 */ );
|
|
|
596
|
|
|
597 DEFVAR_LISP ("ldap-default-base", &Vldap_default_base /*
|
|
|
598 Default base for LDAP searches.
|
|
|
599 This is a string using the syntax of RFC 1779.
|
|
|
600 For instance, "o=ACME, c=US" limits the search to the
|
|
|
601 Acme organization in the United States.
|
|
|
602 */ );
|
|
|
603
|
|
|
604 }
|
|
276
|
605
|
|
|
606
|
