Lecture Sheets / file comparison
comparison: ldapint/whatisldap.txt
ldapint/whatisldap.txt
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| 1 LDAP integration, 15 minute presentation | |
| 2 Lightweight Directory Access Protocol | |
| 3 Audience: Network and software engineers | |
| 4 | |
| 5 Author and speaker | |
| 6 ------------------ | |
| 7 Michael Schloh von Bennewitz, Europalab Networks | |
| 8 web: http://michael.schloh.com/ | |
| 9 email: michael@schloh.com | |
| 10 isdn: +49(89)44239885 | |
| 11 voip: sips:michael@schloh.com | |
| 12 | |
| 13 What is LDAP? | |
| 14 ------------- | |
| 15 IP technology providing fast directory read access. +-------------------+ | |
| 16 Part of most (if not all) Unix and Linux distros. | ISO Model LDAP | | |
| 17 Good integration in Blackberry, Android, and IPhone. | Transport TCP | | |
| 18 Standardized by the IETF in RFC 4510 and many others. +-------------------+ | |
| 19 | |
| 20 Typical use cases | |
| 21 ----------------- | |
| 22 1) Telephone directory. | |
| 23 2) Corporate address book. | |
| 24 3) Employee ID card directory. | |
| 25 4) Password directory. | |
| 26 5) Recipe collection? | |
| 27 X) Utility crosses boundary of SQL technology. | |
| 28 | |
| 29 Comparing LDAP with SQL | |
| 30 ----------------------- | |
| 31 LPAP is a protocol, SQL is a language. | |
| 32 Tuned for reading, tuned for balanced use. | |
| 33 SQL provides transactions, consistency, LDAP doesn't. | |
| 34 | |
| 35 LDAP and SQL round trip comparison (UML sequence diagrams) | |
| 36 ---------------------------------------------------------- | |
| 37 LDAP client binds to a LDAP server and stores the connection. | |
| 38 client uses the LDAP connection to send queries to the server. | |
| 39 The server searches a LDAP directory for the specified attributes. | |
| 40 The server replies with the matched attributes along with values. | |
| 41 | |
| 42 LDAP Mainstream acceptance | |
| 43 -------------------------- | |
| 44 Most are enterprise use cases | |
| 45 1) Suse makes widespred use of LDAP | |
| 46 2) MS Active Directory based on LDAP | |
| 47 3) Apple ease of use LDAP in Addressbook | |
| 48 4) Email address autocompletion | |
| 49 Kontact, Evolution, Thunderbird, iMail, Outlook | |
| 50 5) IP hardphones and softphones (Nokia is missing) | |
| 51 Snom, Polycom, Cisco, Ekiga, SFLPhone | |
| 52 | |
| 53 LDAP Popular implementations | |
| 54 ---------------------------- | |
| 55 OpenLDAP (GPLv2) | |
| 56 Mozilla C/Java | |
| 57 Alcatel-Lucent | |
| 58 Alot of others | |
| 59 | |
| 60 ------------------------ Technical chapter ------------------------ | |
| 61 | |
| 62 OpenLDAP Helloworld | |
| 63 ------------------- | |
| 64 int main(int argc, char *argv[]) { | |
| 65 ldap_initialize(&ld, "ldaps://name.host.com:636/"); | |
| 66 ldap_simple_bind_s(ld, "uid=username,ou=people,dc=host,dc=com", "mypasswordhere"); | |
| 67 ldap_search_s(ld, "dc=intern,dc=host,dc=com", LDAP_SCOPE_SUBTREE, "(sn=Chambe-Eng)", NULL, 0, &result); | |
| 68 dn = ldap_get_dn(ld, ldap_first_entry(ld, result)); | |
| 69 printf("dn: %s\n", dn); | |
| 70 ldap_memfree(dn); | |
| 71 ldap_msgfree(result); | |
| 72 ldap_unbind(ld); | |
| 73 } | |
| 74 | |
| 75 $ cc -c helloldap.c && cc helloldap.o -lldap -llber && ./a.out | |
| 76 dn: uid=Chambe-Eng,ou=scandinavia,ou=people,dc=intern,dc=host,dc=com | |
| 77 | |
| 78 Typical LDAP attrbutes in an addressbook | |
| 79 ---------------------------------------- | |
| 80 Dn (Distinguished name) | |
| 81 Cn (common name) | |
| 82 Uid | |
| 83 Givenname | |
| 84 Surname | |
| 85 Displayname | |
| 86 ... | |
| 87 | |
| 88 LDAP Glossary | |
| 89 ------------- | |
| 90 Directory ~= SQL database | |
| 91 Attribute ~= SQL column | |
| 92 Value ~= SQL value | |
| 93 Distinguished name (DN) = The fixed primary key of any directory entry | |
| 94 Root distinguished name (Root DN) | |
| 95 Schema | |
| 96 BER = Basic Encoding Rules (like ASN.1) | |
| 97 Ldap.conf (Client part) | |
| 98 Slapd.conf (Server part) | |
| 99 SLAPd (OpenLDAP Server) | |
| 100 | |
| 101 Links | |
| 102 ----- | |
| 103 This presentation | |
| 104 Wikipedia | |
| 105 IETF RFCs | |
| 106 OpenLDAP | |
| 107 | |
| 108 ------------------------ Nokia Qt specific ------------------------ | |
| 109 | |
| 110 Assumptions | |
| 111 ----------- | |
| 112 Class called QLdap (QSql), QLdapconnection (QSqlDatabase), ... | |
| 113 | |
| 114 Problems | |
| 115 -------- | |
| 116 In which Qt<Libname> module do the LDAP classes belong? | |
| 117 1) In their own module. | |
| 118 2) In libQtSQL. |
