May 2004 - Darwin-kernel - lists.apple.com

Re: cpu_to_le16 and le16_to_cpu
by Dan Christiansen 27 May '04

27 May '04

Lalit Chandivade wrote: >What is the equivalent of Linux apis cpu_to_le16 and le16_to_cpu on Mac OS >X? > I believe they are in <architecture/byte_order.h> and are called NXSwapHostShortToLittle() and NXSwapLittleShortToHost(). - Dan Christiansen [demime 0.98b removed an attachment of type application/x-pkcs7-signature which had a name of smime.p7s] _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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cpu_to_le16 and le16_to_cpu
by Lalit Chandivade 27 May '04

27 May '04

Hi, What is the equivalent of Linux apis cpu_to_le16 and le16_to_cpu on Mac OS X? Thanks, Lalit. _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: ?? SSH Terminal Sessions unexpectedly pausing/freezing ??
by OpenMacNews 26 May '04

26 May '04

Most people use ethereal for pretty gui packet dissection. It's under the GPL, so it's FSF flavored Free. ethereal can read your tcpdump capture, or can do the capture itself. If you capture with tcpdump, I'd recommend doing the capture with -s 0 to get a full recording of the traffic. OK, so I've built ethereal (that took awhile!) from source, and it now runs (nicely!) under X11, as expected. My next comment it ... arrrrgh! Short of RTFM'ing (which I'm doing ...), what the %&^% am I looking for? Should I simply capture tcpdump output on both "ends" of the suspect SSH transaction, and import them into ethereal? richard _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: ?? SSH Terminal Sessions unexpectedly pausing/freezing ??
by Adam Lazur 25 May '04

25 May '04

Michael Cashwell (mboards(a)prograde.net) said: > Checkout FrameSeer: http://www.lgosys.com/products/frameseer.html > > It's a reasonably-priced shareware app that puts a good GUI around > tcpdump. It decodes header fields, offers several kinds of graphical > traffic maps and is really helpful in presenting tcpdump's output in a > useful fashion. Most people use ethereal for pretty gui packet dissection. It's under the GPL, so it's FSF flavored Free. ethereal can read your tcpdump capture, or can do the capture itself. If you capture with tcpdump, I'd recommend doing the capture with -s 0 to get a full recording of the traffic. -- Adam Lazur, Cluster Monkey _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: ?? SSH Terminal Sessions unexpectedly pausing/freezing ??
by Michael Cashwell 25 May '04

25 May '04

On May 24, 2004, at 5:47 PM, OpenMacNews wrote: ... if no joy, then I'll trouble you for some godlike analysis of tcpdump output (yech!) Checkout FrameSeer: http://www.lgosys.com/products/frameseer.html It's a reasonably-priced shareware app that puts a good GUI around tcpdump. It decodes header fields, offers several kinds of graphical traffic maps and is really helpful in presenting tcpdump's output in a useful fashion. I normally look askance at paying for products that are largely free (tcpdump is doing the heavy lifting) but in this case there is real added value. This app is a godsend for someone like me who needs tcpdump only occasionally and thus finds it impossible to remain fluent in its CLI use or to justify the cost of the commercial alternatives. Best of luck with your adaptor problem. -Mike PS: I have no association with this company other than being a happy user of the product. _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Justified commentary
by Sam Vaughan 25 May '04

25 May '04

// // To the programmer who penned all the carefully justified comments // in IOMediaBSDClient.cpp, thanks for a smile on a quiet afternoon! // You cheated once or twice by throwing in an extra space in places // but the flawless 13 line job at the start of MinorTable::update() // is pure gold! // // Flicking through a couple more files, I get the impression you're // running some kind of source code beautifier over all of the IOKit // source. How'd you like to do us all a favour and let it loose on // the rest of Darwin some day? You could start with vfs_cluster.c! // :-) Sam _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: ?? SSH Terminal Sessions unexpectedly pausing/freezing ?? (darwin-kernel: addressed to exclusive sender for this address)
by Douglas Stetner 25 May '04

25 May '04

On 24/5/04 at 21:53 (-0700), OpenMacNews <darwin-kernel.20.openmacnews(a)spamgourmet.com> wrote: >Doug, >Question 4 you: if this were an issue, shouldn't I expect to see the >same behavior/problem with/between all my machines? Why would this >affect only one 'pair', and in one direction? > >Richard Well, I only have the freezing problem between my home mac and my uni mac, both can ssh to other boxes with no problem. It is finicky, without the afore mentioned settings I see freezes after anywhere between 2-20Mb are transferred. The only info I have been able to find is something about dropped acks causing the freeze, but it only affects ssh protocol. Since I have not seen any resolution to the problem, and since info on ssh hangs is fairly hard to come by, I am only throwing my experience out the in hopes it helps someone. Cheers, Doug -- Douglas Stetner stetner AT stetner DOT org I love deadlines. I especially like the whooshing sound they make as they go flying by. - Douglas Adams _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: ?? SSH Terminal Sessions unexpectedly pausing/freezing ?? (darwin-kernel: addressed to exclusive sender for this address)
by OpenMacNews 25 May '04

25 May '04

Doug, I have a similar problem with ssh between two Macs and found that as well as setting the MTU down to 576 I needed to ensure that I set: net.inet.tcp.delayed_ack: 1 with sysctl. My problem only seemed to start after I replaced my ADSL modem at home. i set MTU globally back to 576, and "sysctl -w net.inet.tcp.delayed_ack=1". alas, to no avail ... Question 4 you: if this were an issue, shouldn't I expect to see the same behavior/problem with/between all my machines? Why would this affect only one 'pair', and in one direction? Richard _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: ?? SSH Terminal Sessions unexpectedly pausing/freezing ??
by Douglas Stetner 25 May '04

25 May '04

On 24/5/04 at 10:57 (-0700), darwin-kernel.20.openmacnews(a)spamgourmet.com (OpenMacNews) wrote: >Specifically, once an SSH session is open/active, any task requiring a >"lot" of data (example: "ls -al" of a large DIR) to be >transferred via terminal session pauses (always) after a fraction of >the expected data is transferred and (frequently) hangs the session. > >Again, this ONLY happens in sessions TO machine (4) from OTHER >machines. Sessions opened: (a) between other machines (b) from (4) to >other machines (c) from (4) to itself ... ALL operate at "full speed" >with NO apparent pauses/hangs in the terminal sessions. > >So far, in efforts to remediate, I've: (a) changed Ehternet MTU >settings from 1500 to 576, both in pair combinations and 'en masse' >(b) varied Client, Server and TCP timeouts in ssh_config & sshd_config >(c) Turned session Compression "off" (c) turned off xinetd service of >sshd, and reverted to standard daemon mode > >NONE of these effort changed/improved the session behavior TO (4). I have a similar problem with ssh between two Macs and found that as well as setting the MTU down to 576 I needed to ensure that I set: net.inet.tcp.delayed_ack: 1 with sysctl. My problem only seemed to start after I replaced my ADSL modem at home. Cheers, Doug -- Douglas Stetner stetner AT stetner DOT org "Out of register space (ugh)" -- vi _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: HFS, HFS+ , HFS Journaled
by Shawn Erickson 25 May '04

25 May '04

On May 24, 2004, at 6:04 PM, Matt Jaffa wrote: Hi, I was wondering if there was some sort of whitesheet, datasheet, whatever they are called, that explains how these file systems are arranged, Like for FAT, Microsoft released a PDF on how FAT12,FAT16, and FAT32 work, with diagrams and everything, explaining the boot sector and how free space is kept track of and the directory structure. Anything like this exist for Apples Filesystems? do they release that info? <http://developer.apple.com/technotes/tn/tn1150.html> -Shawn _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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