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