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** "Creator" jeremy
** "Creation Date" Sat Mar 29 12:14:11 1997
** "Revisor" jeremy
** "Last Modified" Mon Jan 28 19:54:00 2002
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ping them into POSIX ACLs."
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"\nInteroperability with winbindd - single sign-on."
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"manageable"
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"\n\tDon't create mappings that have no meaning to the underlyin
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"\nVFS layer in Samba 3.0 will provide \"pluggable\" mechanisms
to provide this kind of OEM customization [examples/VFS/skel.c].
Test version in 2.2.x"
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"\n\tSimilar to FAM on IRIX ((kernel interface)- this is now ava
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an, with no depth."
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log and by Win32 driver code."
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"\nPrinting (and printer administration) security done by associ
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"\n\tData spooled into job."
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"\n\tOn \"close\" then the print is started."
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"\nBackchannel notification very poorly done (reverse SMB connec
tion from server to client)."
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"\nStandard job commands (enumerate, delete) and queue commands
(pause, resume, purge)."
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NOTES
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T_PNTS (0,448)(0,0)(5773,0)(5773,462)(0,462)(0,448)(5773,448)
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"Samba Printer Code"
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"Implements Windows NT/2000/XP \"point and print\" interfaces."
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"\n\tProvides driver download."
.STR
"\n\tProvides remote store for capability data."
.STR
"\n\tMaps Windows \"printers\" onto UNIX print queues."
.STR
PARA <-500 500 -500 1 1000 31 2 108>
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"\nDepends on drivers doing the data translation (rasterization/
conversion to PS etc.) on the client (raw mode)."
.STR
"\nUses internal tdb database to store capabilities such as DEVI
CEMODE and key/value pair data."
.STR
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"\n\tCan fail with drivers that are expected to be run on the se
rver."
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"Samba Printer Code (continued)"
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T_PNTS (0,282)(0,0)(8753,0)(8753,5232)(0,5232)(0,282)(8753,282)
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"Printer tdb acts as a registry store for printer capabilities."
.STR
"\n"
.STR
"Print queue tdb keeps track of Win32 submitted jobs. Associates
Windows data with underlying UNIX spooling data (as returned fr
om lpq).\n"
.STR
"On job submission a job entry is created in the queue tdb."
.STR
"\nData then spooled into a tmp file."
.STR
"\nOn completion job submitted into UNIX print system using inte
rnal Samba vectored API."
.STR
"\nPolling used to report print status."
END PICTURE
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"Samba Interface to UNIX print system"
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"Kept as simple as possible. Consists of operations :"
.STR
PARA <-500 1000 -500 1 1000 31 2 108>
V_SPACE <28 333 69>
SIZE 240000
"\n\tget_queue"
.STR
"\n\tpause_queue"
.STR
"\n\tresume_queue"
.STR
"\n\tjob_delete"
.STR
"\n\tjob_pause"
.STR
"\n\tjob_resume"
.STR
"\n\tjob_submit"
.STR
PARA <-500 500 -500 1 1000 31 2 108>
V_SPACE <56 389 139>
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"\nCUPS currently only real API user. Others map UNIX commands (
lpq,lprm,lpc) under interface."
END PICTURE
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T_PNTS (0,437)(0,0)(8279,0)(8279,1062)(0,1062)(0,437)(8279,437)
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"Win32 Printer capabilities in Samba"
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T_PNTS (0,285)(0,0)(8908,0)(8908,5169)(0,5169)(0,285)(8908,285)
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"DEVICEMODE stored per printer object in tdb."
.STR
"\nSecurity : ACLs stored per printer in tdb."
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"\n\tAccessing user checked against stored ACL before allowing d
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.STR
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"\nGeneric key/value access provided by GetPrinterData()/SetPrin
terData()/EnumPrinterData() calls."
.STR
PARA <-500 1000 -500 1 1000 31 2 108>
V_SPACE <28 333 69>
SIZE 240000
"\n\tThese can set arbitrary capabilities and enumerate the list
"
.STR
"\n\tTreated as \"blobs\" of typed data and stored in the tdb."
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"\nNo mapping between UNIX capabilities and Win32."
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"Setting up a Samba Printer"
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T_PNTS (0,282)(0,0)(8992,0)(8992,4538)(0,4538)(0,282)(8992,282)
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V_SPACE <56 389 139>
"A driver needs to be bound to the client view of a printer."
.STR
"\n\"Printer\" administrator must bind a driver to a UNIX print
queue."
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"\n\tClients then transparently download and install this code."
.STR
"\n\tUsers don't need to know printer type or how it is configur
ed."
.STR
PARA <-500 500 -500 1 1000 31 2 108>
V_SPACE <56 389 139>
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"\nDriver takes care of GUI dialog capabilities. Changes are sto
red on Samba server and sent via notification to other clients."
END PICTURE
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.STR
"Known Problems"
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V_SPACE <56 389 139>
"No way to ensure Win32 printer driver associated with a printer
by the printer Admin is correct."
.STR
"\n"
.STR
"No way to ensure capabilites set from Win32 match to capabiliti
es set under UNIX (must trust print admin).\nEven with perfect U
NIX API, transition to use extra features will be slow as Samba
must compile on many older systems."
.STR
"\nWin32 printer status decoupled from UNIX printer status (must
pass through narrow API) and error codes don't always match."
END PICTURE
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"Samba Integration with Active Directory"
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V_SPACE <56 389 139>
"In Samba 2.2.x we act as an NT4.x (downlevel) member server."
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"\n\tDCE/RPC functions used to logon/enumerate users."
.STR
"\n\tNo kerberos logon integration."
.STR
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"\nSamba 3.0 (already in alpha) corrects these problems."
.STR
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V_SPACE <28 333 69>
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"\n\tFull SPNEGO/Kerberos 5 logon integration."
.STR
"\n\tUses Windows 2000 KDC"
.STR
"\n\tNew \"net\" command allows Samba server to be added into Wi
ndows 2000 Active Directory using kerberized LDAP calls."
END PICTURE
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"Single Sign-On: Winbindd"
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T_PNTS (0,281)(0,0)(8908,0)(8908,5048)(0,5048)(0,281)(8908,281)
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"Modern UNIXs (and Linux) use a \"name service switch\" to look
up accounts and groups."
.STR
V_SPACE <56 306 139>
"\nConfigurable via /etc/nsswitch.conf this allows any backend a
ccount database to be used to provide user and group lists and i
d's."
.STR
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V_SPACE <28 333 69>
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"\n\tWindows theoretically has a similar client side API, the LS
A API, but this has never been documented by Microsoft (this is
what people mean when they talk about hidden API's :-)."
.STR
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V_SPACE <56 389 139>
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"\nwinbindd is a daemon that uses the trust account with a PDC/A
DS to convert user/group names into SIDs and dynamically map the
m to UNIX user and group id's."
END PICTURE
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"Single Sign-on\n(continued)."
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V_SPACE <56 389 139>
"winbindd allows UNIX/Linux users to log onto their desktop with
DOMAIN\\username and their Windows password."
.STR
PARA <-500 1000 -500 1 1000 31 2 108>
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"\n\tThis is done by a combination of nsswitch changes to extend
the user and group enumeration to include Windows accounts, and
pam modules to replace the standard UNIX authentication."
.STR
PARA <-500 500 -500 1 1000 31 2 108>
V_SPACE <56 389 139>
SIZE 280000
"\nListing the file system can show files owned by remote users.
"
.STR
"\nwinbindd has been tested in 65,000 user Windows 2000 domains,
and caches most information locally. "
END PICTURE
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T_PNTS (0,448)(0,0)(6696,0)(6696,580)(0,580)(0,448)(6696,448)
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"Single Sign-On futures."
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TXTXYOFF <6 285>
T_PNTS (0,285)(0,0)(8756,0)(8756,4456)(0,4456)(0,285)(8756,285)
.STR
V_SPACE <56 389 139>
"In Samba 2.2.x, DCE RPC calls are used to get the user and grou
p info."
.STR
"\nIn Samba 3.0.x, an ADS, kerberized LDAP backend is used (no d
ownlevel calls needed)."
.STR
"\nLDAP backend query allows several bug fixes (correct assignme
nt of primary group) and is more efficient than the RPC method."
.STR
"\nwinbindd is already shipping in production appliances from ma
jor vendors (your next NAS box may include it :-)."
END PICTURE
NOTES
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