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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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384
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29 - OpenLDAP 1.0.3 (http://www.openldap.org/)
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388
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30 - Netscape's LDAP SDK 1.0 (http://developer.netscape.com/) */
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259
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31
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32
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33 #include <config.h>
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34 #include "lisp.h"
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278
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35 #include "opaque.h"
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286
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36 #include "sysdep.h"
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384
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37 #include "buffer.h"
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259
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38
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265
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39 #include <errno.h>
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259
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40
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276
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41 #include "eldap.h"
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42
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371
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43 #ifdef HAVE_NS_LDAP
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44 # define HAVE_LDAP_SET_OPTION 1
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45 # define HAVE_LDAP_GET_ERRNO 1
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46 #else
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47 # undef HAVE_LDAP_SET_OPTION
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48 # undef HAVE_LDAP_GET_ERRNO
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49 #endif
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50
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276
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51 static int ldap_default_port;
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52 static Lisp_Object Vldap_default_base;
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53
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282
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54 /* Needed by the lrecord definition */
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55 Lisp_Object Qldapp;
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56
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276
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57 /* ldap-open plist keywords */
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280
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58 extern Lisp_Object Qport, Qauth, Qbinddn, Qpasswd, Qderef, Qtimelimit,
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276
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59 Qsizelimit;
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259
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60 /* Search scope limits */
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280
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61 extern Lisp_Object Qbase, Qonelevel, Qsubtree;
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259
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62 /* Authentication methods */
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282
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63 extern Lisp_Object Qkrbv41, Qkrbv42;
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259
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64 /* Deref policy */
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280
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65 extern Lisp_Object Qnever, Qalways, Qfind;
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276
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66
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67 /************************************************************************/
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68 /* Utility Functions */
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69 /************************************************************************/
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70
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71 static void
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371
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72 signal_ldap_error (LDAP *ld)
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276
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73 {
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371
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74 #ifdef HAVE_LDAP_GET_ERRNO
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75 signal_simple_error
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76 ("LDAP error",
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77 build_string (ldap_err2string (ldap_get_lderrno (ld, NULL, NULL))));
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276
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78 #else
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371
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79 signal_simple_error ("LDAP error",
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80 build_string (ldap_err2string (ld->ld_errno)));
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361
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81 #endif
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276
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82 }
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83
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84
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85 /************************************************************************/
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286
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86 /* ldap lrecord basic functions */
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276
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87 /************************************************************************/
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88
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282
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89 static Lisp_Object
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90 make_ldap (struct Lisp_LDAP *ldap)
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91 {
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92 Lisp_Object lisp_ldap;
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93 XSETLDAP (lisp_ldap, ldap);
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94 return lisp_ldap;
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95 }
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276
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96
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97 static Lisp_Object
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98 mark_ldap (Lisp_Object obj, void (*markobj) (Lisp_Object))
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99 {
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282
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100 return XLDAP (obj)->host;
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276
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101 }
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102
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103 static void
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104 print_ldap (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
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105 {
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282
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106 char buf[32];
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276
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107
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108 struct Lisp_LDAP *ldap = XLDAP (obj);
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109
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110 if (print_readably)
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111 error ("printing unreadable object #<ldap %s>",
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112 XSTRING_DATA (ldap->host));
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113
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278
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114 write_c_string ("#<ldap ", printcharfun);
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115 print_internal (ldap->host, printcharfun, 1);
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371
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116 if (!ldap->livep)
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282
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117 write_c_string ("(dead) ",printcharfun);
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286
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118 sprintf (buf, " 0x%x>", (unsigned int)ldap);
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278
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119 write_c_string (buf, printcharfun);
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276
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120 }
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121
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122 static struct Lisp_LDAP *
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123 allocate_ldap (void)
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124 {
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125 struct Lisp_LDAP *ldap =
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126 alloc_lcrecord_type (struct Lisp_LDAP, lrecord_ldap);
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127
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282
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128 ldap->ld = NULL;
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276
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129 ldap->host = Qnil;
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371
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130 ldap->livep = 0;
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276
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131 return ldap;
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132 }
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133
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280
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134 static void
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135 finalize_ldap (void *header, int for_disksave)
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136 {
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137 struct Lisp_LDAP *ldap = (struct Lisp_LDAP *) header;
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138
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139 if (for_disksave)
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282
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140 signal_simple_error ("Can't dump an emacs containing LDAP objects",
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141 make_ldap (ldap));
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142
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371
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143 if (ldap->livep)
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280
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144 ldap_unbind (ldap->ld);
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145 }
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146
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276
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147 DEFINE_LRECORD_IMPLEMENTATION ("ldap", ldap,
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280
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148 mark_ldap, print_ldap, finalize_ldap,
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276
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149 NULL, NULL, struct Lisp_LDAP);
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150
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151
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152
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153
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154 /************************************************************************/
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155 /* Basic ldap accessors */
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156 /************************************************************************/
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157
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158 DEFUN ("ldapp", Fldapp, 1, 1, 0, /*
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159 Return t if OBJECT is a LDAP connection.
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160 */
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161 (object))
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162 {
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163 return LDAPP (object) ? Qt : Qnil;
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164 }
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165
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166 DEFUN ("ldap-host", Fldap_host, 1, 1, 0, /*
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167 Return the server host of the connection LDAP, as a string.
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168 */
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169 (ldap))
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170 {
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171 CHECK_LDAP (ldap);
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172 return (XLDAP (ldap))->host;
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173 }
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174
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282
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175 DEFUN ("ldap-live-p", Fldap_status, 1, 1, 0, /*
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176 Return t if LDAP is an active LDAP connection.
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276
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177 */
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178 (ldap))
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179 {
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180 CHECK_LDAP (ldap);
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371
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181 return (XLDAP (ldap))->livep ? Qt : Qnil;
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276
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182 }
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183
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184 /************************************************************************/
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185 /* Opening/Closing a LDAP connection */
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186 /************************************************************************/
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187
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188
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189 DEFUN ("ldap-open", Fldap_open, 1, 2, 0, /*
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190 Open a LDAP connection to HOST.
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191 PLIST is a plist containing additional parameters for the connection.
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259
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192 Valid keys in that list are:
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276
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193 `port' the TCP port to use for the connection if different from
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194 `ldap-default-port'.
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259
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195 `auth' is the authentication method to use, possible values depend on
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196 the LDAP library XEmacs was compiled with: `simple', `krbv41' and `krbv42'.
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197 `binddn' is the distinguished name of the user to bind as (in RFC 1779 syntax).
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198 `passwd' is the password to use for simple authentication.
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199 `deref' is one of the symbols `never', `always', `search' or `find'.
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200 `timelimit' is the timeout limit for the connection in seconds.
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201 `sizelimit' is the maximum number of matches to return.
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202 */
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276
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203 (host, plist))
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259
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204 {
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282
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205 /* This function can GC */
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206 struct Lisp_LDAP *ldap;
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259
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207 LDAP *ld;
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278
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208 int ldap_port = 0;
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259
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209 int ldap_auth = LDAP_AUTH_SIMPLE;
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210 char *ldap_binddn = NULL;
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211 char *ldap_passwd = NULL;
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212 int ldap_deref = LDAP_DEREF_NEVER;
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213 int ldap_timelimit = 0;
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214 int ldap_sizelimit = 0;
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278
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215 int err;
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259
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216
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282
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217 Lisp_Object list, keyword, value;
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259
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218
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276
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219 CHECK_STRING (host);
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220
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282
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221 EXTERNAL_PROPERTY_LIST_LOOP (list, keyword, value, plist)
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276
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222 {
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223 /* TCP Port */
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224 if (EQ (keyword, Qport))
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259
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225 {
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276
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226 CHECK_INT (value);
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227 ldap_port = XINT (value);
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259
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228 }
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229 /* Authentication method */
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276
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230 if (EQ (keyword, Qauth))
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259
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231 {
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232 if (EQ (value, Qsimple))
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233 ldap_auth = LDAP_AUTH_SIMPLE;
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234 #ifdef LDAP_AUTH_KRBV41
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235 else if (EQ (value, Qkrbv41))
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236 ldap_auth = LDAP_AUTH_KRBV41;
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237 #endif
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238 #ifdef LDAP_AUTH_KRBV42
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239 else if (EQ (value, Qkrbv42))
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240 ldap_auth = LDAP_AUTH_KRBV42;
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241 #endif
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242 else
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243 signal_simple_error ("Invalid authentication method", value);
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244 }
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245 /* Bind DN */
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246 else if (EQ (keyword, Qbinddn))
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247 {
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276
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248 CHECK_STRING (value);
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384
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249 GET_C_STRING_OS_DATA_ALLOCA (value, ldap_binddn);
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259
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250 }
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251 /* Password */
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252 else if (EQ (keyword, Qpasswd))
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253 {
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276
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254 CHECK_STRING (value);
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384
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255 GET_C_STRING_OS_DATA_ALLOCA (value, ldap_passwd);
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259
|
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
|
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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388
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291 slow_down_interrupts ();
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276
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292 ld = ldap_open ((char *)XSTRING_DATA (host), ldap_port);
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388
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293 speed_up_interrupts ();
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294
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276
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295 if (ld == NULL )
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296 signal_simple_error_2 ("Failed connecting to host",
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297 host,
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298 lisp_strerror (errno));
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259
|
299
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|
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300
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280
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301 #ifdef HAVE_LDAP_SET_OPTION
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371
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302 if (ldap_set_option (ld, LDAP_OPT_DEREF, (void *)&ldap_deref) != LDAP_SUCCESS)
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303 signal_ldap_error (ld);
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304 if (ldap_set_option (ld, LDAP_OPT_TIMELIMIT,
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305 (void *)&ldap_timelimit) != LDAP_SUCCESS)
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306 signal_ldap_error (ld);
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307 if (ldap_set_option (ld, LDAP_OPT_SIZELIMIT,
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308 (void *)&ldap_sizelimit) != LDAP_SUCCESS)
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309 signal_ldap_error (ld);
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310 if (ldap_set_option (ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON) != LDAP_SUCCESS)
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311 signal_ldap_error (ld);
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280
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312 #else /* not HAVE_LDAP_SET_OPTION */
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259
|
313 ld->ld_deref = ldap_deref;
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314 ld->ld_timelimit = ldap_timelimit;
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315 ld->ld_sizelimit = ldap_sizelimit;
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316 #ifdef LDAP_REFERRALS
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317 ld->ld_options = LDAP_OPT_REFERRALS;
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280
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318 #else /* not LDAP_REFERRALS */
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259
|
319 ld->ld_options = 0;
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280
|
320 #endif /* not LDAP_REFERRALS */
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|
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321 #endif /* not HAVE_LDAP_SET_OPTION */
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|
259
|
322
|
|
371
|
323 /* ldap_bind_s calls select and may be wedged by SIGIO. */
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324 slow_down_interrupts ();
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|
276
|
325 err = ldap_bind_s (ld, ldap_binddn, ldap_passwd, ldap_auth);
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371
|
326 speed_up_interrupts ();
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|
276
|
327 if (err != LDAP_SUCCESS)
|
|
259
|
328 signal_simple_error ("Failed binding to the server",
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|
329 build_string (ldap_err2string (err)));
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|
|
330
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|
282
|
331 ldap = allocate_ldap ();
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332 ldap->ld = ld;
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333 ldap->host = host;
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|
371
|
334 ldap->livep = 1;
|
|
276
|
335
|
|
282
|
336 return make_ldap (ldap);
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|
276
|
337 }
|
|
|
338
|
|
|
339
|
|
|
340
|
|
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341 DEFUN ("ldap-close", Fldap_close, 1, 1, 0, /*
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|
|
342 Close an LDAP connection.
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|
|
343 */
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|
|
344 (ldap))
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|
|
345 {
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|
280
|
346 struct Lisp_LDAP *lldap;
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|
|
347 CHECK_LIVE_LDAP (ldap);
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|
|
348 lldap = XLDAP (ldap);
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|
|
349 ldap_unbind (lldap->ld);
|
|
371
|
350 lldap->livep = 0;
|
|
276
|
351 return Qnil;
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|
|
352 }
|
|
|
353
|
|
|
354
|
|
|
355
|
|
|
356 /************************************************************************/
|
|
|
357 /* Working on a LDAP connection */
|
|
|
358 /************************************************************************/
|
|
278
|
359 struct ldap_unwind_struct
|
|
|
360 {
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|
|
361 LDAPMessage *res;
|
|
371
|
362 char **vals;
|
|
278
|
363 };
|
|
|
364
|
|
371
|
365
|
|
278
|
366 static Lisp_Object
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|
|
367 ldap_search_unwind (Lisp_Object unwind_obj)
|
|
|
368 {
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|
|
369 struct ldap_unwind_struct *unwind =
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|
|
370 (struct ldap_unwind_struct *) get_opaque_ptr (unwind_obj);
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|
282
|
371 if (unwind->res)
|
|
278
|
372 ldap_msgfree (unwind->res);
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|
282
|
373 if (unwind->vals)
|
|
371
|
374 ldap_value_free (unwind->vals);
|
|
286
|
375 return Qnil;
|
|
278
|
376 }
|
|
276
|
377
|
|
|
378 DEFUN ("ldap-search-internal", Fldap_search_internal, 2, 6, 0, /*
|
|
|
379 Perform a search on an open LDAP connection.
|
|
|
380 LDAP is an LDAP connection object created with `ldap-open'.
|
|
298
|
381 FILTER is a filter string for the search as described in RFC 1558.
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|
|
382 BASE is the distinguished name at which to start the search.
|
|
|
383 SCOPE is one of the symbols `base', `onelevel' or `subtree' indicating
|
|
|
384 the scope of the search.
|
|
276
|
385 ATTRS is a list of strings indicating which attributes to retrieve
|
|
|
386 for each matching entry. If nil return all available attributes.
|
|
|
387 If ATTRSONLY is non-nil then only the attributes are retrieved, not
|
|
298
|
388 the associated values.
|
|
276
|
389 The function returns a list of matching entries. Each entry is itself
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390 an alist of attribute/values.
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391 */
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392 (ldap, filter, base, scope, attrs, attrsonly))
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393 {
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282
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394 /* This function can GC */
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276
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395
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396 /* Vars for query */
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397 LDAP *ld;
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278
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398 LDAPMessage *e;
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276
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399 BerElement *ptr;
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400 char *a;
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371
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401 int i, rc;
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276
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402 int matches;
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278
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403 struct ldap_unwind_struct unwind;
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276
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404
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405 int ldap_scope = LDAP_SCOPE_SUBTREE;
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406 char **ldap_attributes = NULL;
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407
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278
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408 int speccount = specpdl_depth ();
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409
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276
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410 Lisp_Object list, entry, result;
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411 struct gcpro gcpro1, gcpro2, gcpro3;
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412
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413 list = entry = result = Qnil;
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282
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414 GCPRO3 (list, entry, result);
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276
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415
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282
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416 unwind.res = NULL;
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417 unwind.vals = NULL;
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278
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418
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276
|
419 /* Do all the parameter checking */
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420 CHECK_LIVE_LDAP (ldap);
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282
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421 ld = XLDAP (ldap)->ld;
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276
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422
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423 /* Filter */
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424 CHECK_STRING (filter);
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425
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426 /* Search base */
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427 if (NILP (base))
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428 {
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429 base = Vldap_default_base;
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430 }
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431 if (!NILP (base))
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432 {
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304
|
433 CHECK_STRING (base);
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276
|
434 }
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435
|
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436 /* Search scope */
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|
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437 if (!NILP (scope))
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438 {
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439 if (EQ (scope, Qbase))
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440 ldap_scope = LDAP_SCOPE_BASE;
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441 else if (EQ (scope, Qonelevel))
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442 ldap_scope = LDAP_SCOPE_ONELEVEL;
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443 else if (EQ (scope, Qsubtree))
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444 ldap_scope = LDAP_SCOPE_SUBTREE;
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445 else
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|
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446 signal_simple_error ("Invalid scope", scope);
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|
|
447 }
|
|
|
448
|
|
|
449 /* Attributes to search */
|
|
|
450 if (!NILP (attrs))
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|
|
451 {
|
|
|
452 CHECK_CONS (attrs);
|
|
278
|
453 ldap_attributes = alloca_array (char *, 1 + XINT (Flength (attrs)));
|
|
276
|
454
|
|
278
|
455 i = 0;
|
|
|
456 EXTERNAL_LIST_LOOP (attrs, attrs)
|
|
|
457 {
|
|
|
458 Lisp_Object current = XCAR (attrs);
|
|
|
459 CHECK_STRING (current);
|
|
384
|
460 GET_C_STRING_OS_DATA_ALLOCA (current, ldap_attributes[i]);
|
|
278
|
461 ++i;
|
|
|
462 }
|
|
276
|
463 ldap_attributes[i] = NULL;
|
|
|
464 }
|
|
|
465
|
|
|
466 /* Attributes only ? */
|
|
|
467 CHECK_SYMBOL (attrsonly);
|
|
|
468
|
|
|
469 /* Perform the search */
|
|
|
470 if (ldap_search (ld,
|
|
|
471 NILP (base) ? "" : (char *) XSTRING_DATA (base),
|
|
|
472 ldap_scope,
|
|
|
473 NILP (filter) ? "" : (char *) XSTRING_DATA (filter),
|
|
|
474 ldap_attributes,
|
|
|
475 NILP (attrsonly) ? 0 : 1)
|
|
371
|
476 == -1)
|
|
276
|
477 {
|
|
371
|
478 signal_ldap_error (ld);
|
|
259
|
479 }
|
|
|
480
|
|
278
|
481 /* Ensure we don't exit without cleaning up */
|
|
|
482 record_unwind_protect (ldap_search_unwind,
|
|
|
483 make_opaque_ptr (&unwind));
|
|
|
484
|
|
259
|
485 /* Build the results list */
|
|
|
486 matches = 0;
|
|
|
487
|
|
371
|
488 /* ldap_result calls select() and can get wedged by EINTR signals */
|
|
|
489 slow_down_interrupts ();
|
|
282
|
490 rc = ldap_result (ld, LDAP_RES_ANY, 0, NULL, &unwind.res);
|
|
371
|
491 speed_up_interrupts ();
|
|
282
|
492 while (rc == LDAP_RES_SEARCH_ENTRY)
|
|
259
|
493 {
|
|
278
|
494 QUIT;
|
|
259
|
495 matches ++;
|
|
278
|
496 e = ldap_first_entry (ld, unwind.res);
|
|
282
|
497 /* #### This call to message() is pretty fascist, because it
|
|
|
498 destroys the current echo area contents, even when invoked
|
|
|
499 from Lisp. It should use echo_area_message() instead, and
|
|
|
500 restore the old echo area contents later. */
|
|
|
501 message ("Parsing ldap results... %d", matches);
|
|
259
|
502 entry = Qnil;
|
|
|
503 for (a= ldap_first_attribute (ld, e, &ptr);
|
|
|
504 a != NULL;
|
|
371
|
505 a= ldap_next_attribute (ld, e, ptr) )
|
|
259
|
506 {
|
|
292
|
507 list = Fcons (build_ext_string (a, FORMAT_OS), Qnil);
|
|
371
|
508 unwind.vals = ldap_get_values (ld, e, a);
|
|
278
|
509 if (unwind.vals != NULL)
|
|
259
|
510 {
|
|
282
|
511 for (i = 0; unwind.vals[i] != NULL; i++)
|
|
259
|
512 {
|
|
371
|
513 list = Fcons (build_ext_string (unwind.vals[i], FORMAT_OS),
|
|
259
|
514 list);
|
|
|
515 }
|
|
|
516 }
|
|
|
517 entry = Fcons (Fnreverse (list),
|
|
|
518 entry);
|
|
371
|
519 ldap_value_free (unwind.vals);
|
|
282
|
520 unwind.vals = NULL;
|
|
259
|
521 }
|
|
|
522 result = Fcons (Fnreverse (entry),
|
|
|
523 result);
|
|
278
|
524 ldap_msgfree (unwind.res);
|
|
282
|
525 unwind.res = NULL;
|
|
276
|
526
|
|
371
|
527 slow_down_interrupts ();
|
|
278
|
528 rc = ldap_result (ld, LDAP_RES_ANY, 0, NULL, &(unwind.res));
|
|
371
|
529 speed_up_interrupts ();
|
|
259
|
530 }
|
|
|
531
|
|
|
532 if (rc == -1)
|
|
371
|
533 {
|
|
|
534 signal_ldap_error (ld);
|
|
|
535 }
|
|
280
|
536 rc = ldap_result2error (ld, unwind.res, 0);
|
|
371
|
537 if ((rc != LDAP_SUCCESS) &&
|
|
|
538 (rc != LDAP_SIZELIMIT_EXCEEDED))
|
|
|
539 {
|
|
|
540 signal_ldap_error (ld);
|
|
|
541 }
|
|
259
|
542
|
|
278
|
543 ldap_msgfree (unwind.res);
|
|
|
544 unwind.res = (LDAPMessage *)NULL;
|
|
282
|
545 /* #### See above for calling message(). */
|
|
|
546 message ("Parsing ldap results... done");
|
|
259
|
547
|
|
278
|
548 unbind_to (speccount, Qnil);
|
|
259
|
549 UNGCPRO;
|
|
282
|
550 return Fnreverse (result);
|
|
259
|
551 }
|
|
|
552
|
|
|
553
|
|
|
554 void
|
|
|
555 syms_of_eldap (void)
|
|
|
556 {
|
|
276
|
557 defsymbol (&Qldapp, "ldapp");
|
|
|
558 DEFSUBR (Fldapp);
|
|
|
559 DEFSUBR (Fldap_host);
|
|
|
560 DEFSUBR (Fldap_status);
|
|
|
561 DEFSUBR (Fldap_open);
|
|
|
562 DEFSUBR (Fldap_close);
|
|
|
563 DEFSUBR (Fldap_search_internal);
|
|
259
|
564 }
|
|
|
565
|
|
|
566 void
|
|
|
567 vars_of_eldap (void)
|
|
|
568 {
|
|
|
569
|
|
276
|
570 ldap_default_port = LDAP_PORT;
|
|
|
571 Vldap_default_base = Qnil;
|
|
|
572
|
|
|
573 DEFVAR_INT ("ldap-default-port", &ldap_default_port /*
|
|
|
574 Default TCP port for LDAP connections.
|
|
|
575 Initialized from the LDAP library. Default value is 389.
|
|
259
|
576 */ );
|
|
|
577
|
|
|
578 DEFVAR_LISP ("ldap-default-base", &Vldap_default_base /*
|
|
|
579 Default base for LDAP searches.
|
|
|
580 This is a string using the syntax of RFC 1779.
|
|
|
581 For instance, "o=ACME, c=US" limits the search to the
|
|
|
582 Acme organization in the United States.
|
|
|
583 */ );
|
|
|
584
|
|
|
585 }
|
|
276
|
586
|
|
|
587
|
