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Diffstat (limited to 'source/namebrowse.doc')
| -rw-r--r-- | source/namebrowse.doc | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/source/namebrowse.doc b/source/namebrowse.doc deleted file mode 100644 index 82713d85708..00000000000 --- a/source/namebrowse.doc +++ /dev/null @@ -1,149 +0,0 @@ -/* - Unix SMB/Netbios documentation. - Version 0.1 - Copyright (C) Luke Leighton Andrew Tridgell 1996 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - Document name: namebrowse.doc - - Revision History: - - 0.0 - 02jul96 : lkcl@pires.co.uk - created - - 0.1 - 22jul96 Andrew.Tridgell@anu.edu.au - tridge's comments on first revision -*/ - -this module deals with queueing servers that samba must sync browse -lists with. it will always issue a name query immediately before -actually carrying out the NetServerEnum call, to ensure that time -is not wasted by a remote server's failure. - -this module was created to minimise the amount of NetServerEnum calls -that samba may be asked to perform, by maintaining the name of a server -for up to a minute after the NetServerEnum call was issued, and -disallowing further NetServerEnum calls to this remote server until -the entry is removed. - -samba can ask for a NetServerEnum call to be issued to grab a remote -server's list of servers and workgroups either in its capacity as -a domain master browser, as a local master browser. - -samba does not deal with becoming a backup master browser properly -at present. - -------------- -NOTE FROM TRIDGE: - -Yes, samba can send these either in its capacity as a DMB or as a -MB. There are only two situations: - -- If samba is a DMB then it should sync with the "local only" bit set -with any master browser that has sent it a "master announce". - -- if samba is not a DMB then it can only sync with the DMB, and should -not set the "local only" bit. - -Note that samba should never sync with other non-DMB servers when it -is not a DMB. - -Try to do a sync under any other circumstances is dangerous without a -multi-threaded nmbd. I have a print server at home that knows some SMB -and NBT, but if you try to sync browse lists with it then it clogs up, -and also clogs up nmbd while it times out the connection. If we -follow the above two rules then we can't get into this sort of -trouble as: - -- if we are a DMB and a master browser sends us a "master announce" -then it is expecting to receive a NetServerEnum SMB connection soon, -and must be capabable of handling it. - -- if we are not a DMB then we will only sync with the DMB, which must -be capable of doing this stuff or things are really in a mess :-) --------------- - - -/************************************************************************* - do_browser_lists() - *************************************************************************/ - -this function is responsible for finding an appropriate entry in the -sync browser cache, initiating a name query (which results in a -NetServerEnum call if there is a positive response), and then -removing all entries that have been actioned and have been around -for over a minute. - - -/************************************************************************* - start_sync_browse_entry() - *************************************************************************/ - -this function is responsible for initiating a name query. if a -positive response is received, then this will result in a -NetServerEnum api call. - -samba will only initiate this process if it is a master browser -for this workgroup. - ------------ -NOTE FROM TRIDGE: - -I'd actually prefer to skip the name query completely if we can -resolve the DMBs name via gethostbyname(). For the name query to work -we either have to have WINS working, or we need to know the broadcast -address of the network that the DMB is on. This makes us too dependent -on too many thing being right. - -If the gethostbyname() fails then sure, go for a normal name query, -but if it works then we have saved ourselves a lot of trouble and -gained a lot of robustness. - -This is best handled by a generic "resolve netbios name" routine that -tries DNS first then resorts to WINS or bcast if that fails. It also -needs to cache the results. -------------- - - -/************************************************************************* - add_browser_entry() - *************************************************************************/ - -this function is responsible for adding a browser into the list of -servers to sync browse lists with. if the server entry has already -been added and syncing browse lists has already been initiated, it -will not be added again. - - -/************************************************************************* - expire_browse_cache() - *************************************************************************/ - -this function is responsible for removing entries that have had the -sync browse list initiated (whether that succeeded or not is beyond -this function's scope) and have been in the cache for a while. - - -/************************************************************************* - add_browse_entry() - *************************************************************************/ - -this function is responsible for adding a new entry into the list -of servers to sync browse lists with at some point in the near future. - - - - |