November 2001 - WLUG - wlug.mailman3.com

Re: [Wlug] DCHP Private IP Hostname Resolution

by Gary J. Hanley

Hi Doug, And thanks for your input. Unfortunately I can't modify any DCHP config settings in the router (that I know of anyway), so I have to find a way to either get the Linux PCs to report their host names to the router or have the router find the hostname from the PC. When booted in Windows they do that but in Linux they do not. Of course I can always go back to a static IP and I might just ultimately do that, but I'd like to know if there is a way to make this work. Thanks again! -- Gary ----- Original Message ----- From: "doug waud" <douglas.waud(a)umassmed.edu> To: <wlug(a)mail.wlug.org> Sent: Saturday, November 10, 2001 3:32 PM Subject: Re: [Wlug] DCHP Private IP Hostname Resolution > Hi again (with a red face!) > > > Sure, but the IPs are dynamic so the hosts file is out, right? > > Missed that (another "senior moment")! :-( > Now I remember one reason I have been using static IP addresses :-) > > One way to cheat a bit would be to assign addresses but tie > them to the MAC address of the ethernet card of each box, i.e. add > something like > > host box1 { > hardware ethernet 00:A0:CC:E4:86:CD; > fixed-address 192.168.1.222; > } > > to /etc/dhcpd.conf > > Then you could use the /etc/hosts route. Not an elegant solution > but, what the hell, this is a rear-guard action :-) > > Unfortunately I have no dhcpd server running so I cannot test the > following, but include it as a potential more elegant solution > [and also as an attempt at face-saving :-) ] > > I believe there should be a file /etc/dhcpd.leases with sections like > > lease 192.168.1.25 { > starts 2 2001/07/31 15:23:47; > ends 3 2001/08/01 03:23:47; > hardware ethernet 00:a0:cc:e7:6a:b9; > uid 00:A0:CC:E4:86:CD; > client-hostname "box3"; > } > > If so with some cat|awk|grep|sed piping you should be able > automatically to extract the dotted quad which goes with each > host and give the former to ping to chew on. > > As I say, I can't test this. However, if you are masochistic > enough to want to continue this thread, feel free to send me > a sample copy of that /etc/dhcpd.leases file and I'll see > if I can get a short shell script you could try instead of ping. > > On the more positive side, at least you now know the dangers > of posting a query :-) > > doug > -- > Douglas R Waud, Professor Emeritus -- Pharmacology > University of Massachusetts Medical School > Mailing address: 17 Lantern Lane, Shrewsbury, MA 01545-2006 > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

Nov. 11, 2001

irda help

by Wesley T Allen

Hi gang, I've finally gotten the irDa stack working in my dell laptop (why, oh why is it disabled by default in the BIOS?). Here's my problem; I'm having trouble having the ppp connection being authenticated when a connection is made. My iPaq connects, has the host name of my laptop ok; but stalls there. I've followed the steps on the ir-howto, and it's what got me to this point, but there's no troubleshooting help for this particular problem. Here's the command I run to start the attachement... irattach /dev/ttyS2 -s 1 At this point my iPaq tries to authenticate, and then stalls. I would REALLY like to be able to transfer data between my iPaq and my laptop; and since I haven't heard of anyone being able to connect an iPaq to Linux via a USB cable, this looks like my best shot (besides, I really want to learn ir so I can control my TV from my laptop). Anyone got some ideas, if you help me solve it I'll try and submit something to the HOWTO so others can work around it. Wes

Nov. 10, 2001

Re: [Wlug] DCHP Private IP Hostname Resolution

by doug waud

Hi again (with a red face!) > Sure, but the IPs are dynamic so the hosts file is out, right? Missed that (another "senior moment")! :-( Now I remember one reason I have been using static IP addresses :-) One way to cheat a bit would be to assign addresses but tie them to the MAC address of the ethernet card of each box, i.e. add something like host box1 { hardware ethernet 00:A0:CC:E4:86:CD; fixed-address 192.168.1.222; } to /etc/dhcpd.conf Then you could use the /etc/hosts route. Not an elegant solution but, what the hell, this is a rear-guard action :-) Unfortunately I have no dhcpd server running so I cannot test the following, but include it as a potential more elegant solution [and also as an attempt at face-saving :-) ] I believe there should be a file /etc/dhcpd.leases with sections like lease 192.168.1.25 { starts 2 2001/07/31 15:23:47; ends 3 2001/08/01 03:23:47; hardware ethernet 00:a0:cc:e7:6a:b9; uid 00:A0:CC:E4:86:CD; client-hostname "box3"; } If so with some cat|awk|grep|sed piping you should be able automatically to extract the dotted quad which goes with each host and give the former to ping to chew on. As I say, I can't test this. However, if you are masochistic enough to want to continue this thread, feel free to send me a sample copy of that /etc/dhcpd.leases file and I'll see if I can get a short shell script you could try instead of ping. On the more positive side, at least you now know the dangers of posting a query :-) doug -- Douglas R Waud, Professor Emeritus -- Pharmacology University of Massachusetts Medical School Mailing address: 17 Lantern Lane, Shrewsbury, MA 01545-2006

Nov. 10, 2001

Re: [Wlug] DCHP Private IP Hostname Resolution

by Gary J. Hanley

Sure, but the IPs are dynamic so the hosts file is out, right? -- Gary ----- Original Message ----- From: "doug waud" <douglas.waud(a)umassmed.edu> To: <wlug(a)mail.wlug.org> Sent: Saturday, November 10, 2001 11:49 AM Subject: Re: [Wlug] DCHP Private IP Hostname Resolution > Hi > > I just installed a Netgear RP114 DSL router and I'm letting it set my > > private IPs with DCHP. My problem is that I need to resolve the hostnames > > between the 3 Linux machines on my private lan and the router isn't doing > > that. > > > > When they are booted in Windows the DCHP table shows the IP and hostname of > > each PC, but when booted in Linux the router doesn't resolve the hostname to > > IP...so when I ping a hostname I get nothing. > > The easiest way to do this is simply to add those three hosts > to your /etc/hosts file (this is simplest since you have only > three boxes to deal with) > > Just add lines like > 192.168.1.5 box1.localdomain box1 > 192.168.1.32 box2.localdomain box2 > to /etc/hosts > > doug > > -- > Douglas R Waud, Professor Emeritus -- Pharmacology > University of Massachusetts Medical School > Mailing address: 17 Lantern Lane, Shrewsbury, MA 01545-2006 > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

Nov. 10, 2001

Re: [Wlug] DCHP Private IP Hostname Resolution

by doug waud

Hi > I just installed a Netgear RP114 DSL router and I'm letting it set my > private IPs with DCHP. My problem is that I need to resolve the hostnames > between the 3 Linux machines on my private lan and the router isn't doing > that. > > When they are booted in Windows the DCHP table shows the IP and hostname of > each PC, but when booted in Linux the router doesn't resolve the hostname to > IP...so when I ping a hostname I get nothing. The easiest way to do this is simply to add those three hosts to your /etc/hosts file (this is simplest since you have only three boxes to deal with) Just add lines like 192.168.1.5 box1.localdomain box1 192.168.1.32 box2.localdomain box2 to /etc/hosts doug -- Douglas R Waud, Professor Emeritus -- Pharmacology University of Massachusetts Medical School Mailing address: 17 Lantern Lane, Shrewsbury, MA 01545-2006

Nov. 10, 2001

DCHP Private IP Hostname Resolution

by Gary J. Hanley

Greetings, I suspect this is an easy fix but somehow I can't find it.... I just installed a Netgear RP114 DSL router and I'm letting it set my private IPs with DCHP. My problem is that I need to resolve the hostnames between the 3 Linux machines on my private lan and the router isn't doing that. When they are booted in Windows the DCHP table shows the IP and hostname of each PC, but when booted in Linux the router doesn't resolve the hostname to IP...so when I ping a hostname I get nothing. Any ideas? Thanks! -- Gary

Nov. 10, 2001

Re: [Wlug] Raw IO Howto

by Skip Gaede

On Friday 09 November 2001 10:31 pm, you wrote: > Can you do a > > bash$raw -qa > > as root and post the output. root:/usr/src/linux# raw /dev/raw1 /dev/hdc1 /dev/raw/raw1: bound to major 22, minor 1 root:/usr/src/linux# raw -qa /dev/raw/raw1: bound to major 22, minor 1 I don't understand why the output says /dev/*raw*/raw1 is bound when I said /dev/raw1? NOTE: root:/usr/src/linux# ls -R /dev/raw* /dev/raw1 /dev/raw2 /dev/raw3 /dev/raw4 /dev/raw5 /dev/rawctl (There's nothing there that looks like /dev/raw/raw1!) > > I assume that you used the "raw" command to bind the > block device for raw I/O such as > > bash$raw /dev/raw/raw1 /dev/hdc1 > Is it necessary to use the devfs for this to work? > > On another note you may also want to check the permissions > on the device file(s). This would cause the open to fail! I'm doing this as root. Permissions shouldn't be an issue, should they? > > Skip Gaede wrote: > > On Friday 09 November 2001 04:05 pm, Brad Noyes wrote: > > > Just a quick suggestion; open() sets perror(). try calling perror after > > > your open() call, it might give you (and us) some insite to why you > > > can't open the device. > > > > Sorry about that! > > > > I get "No such file or device", which I also get if I do "ls > > /dev/raw/raw1" > > > > I have in /dev/{raw1,raw2...} > > > > If I change the code to open /dev/raw1, the open succeeds but the reads > > and writes then fail. > > > > Should I be able to see this mythical device in the /proc filesystem > > somewhere, cause I can't seem to find it... > > > > Thanks, Skip > > > > > On Fri, Nov 09, 2001 at 03:08:50PM -0500, Skip Gaede wrote: > > > > Folks, > > > > > > > > I'd like to be able to queue read/write request to my Zip drive and > > > > bypass the buffering that goes on in the kernel. From what I've read, > > > > you can do this by binding the raw device (/dev/raw) to /dev/hdc1 for > > > > example. > > > > > > > > When I do that, I get a message that /dev/raw/raw1 has ben bound to > > > > char major 22 1. When I try > > > > > > > > open("/dev/raw/raw1",O_RDWR|O_CREAT,S_IREAD|S_IWRITE); > > > > > > > > it fails. Can someone tell me how to do this please? > > > > > > > > Thanks, > > > > Skip > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

Nov. 10, 2001

Re: [Wlug] Raw IO Howto

by Tom Guilderson

Can you do a bash$raw -qa as root and post the output. I assume that you used the "raw" command to bind the block device for raw I/O such as bash$raw /dev/raw/raw1 /dev/hdc1 On another note you may also want to check the permissions on the device file(s). This would cause the open to fail! Skip Gaede wrote: > > On Friday 09 November 2001 04:05 pm, Brad Noyes wrote: > > Just a quick suggestion; open() sets perror(). try calling perror after > > your open() call, it might give you (and us) some insite to why you can't > > open the device. > > > Sorry about that! > > I get "No such file or device", which I also get if I do "ls /dev/raw/raw1" > > I have in /dev/{raw1,raw2...} > > If I change the code to open /dev/raw1, the open succeeds but the reads and > writes then fail. > > Should I be able to see this mythical device in the /proc filesystem > somewhere, cause I can't seem to find it... > > Thanks, Skip > > > On Fri, Nov 09, 2001 at 03:08:50PM -0500, Skip Gaede wrote: > > > Folks, > > > > > > I'd like to be able to queue read/write request to my Zip drive and > > > bypass the buffering that goes on in the kernel. From what I've read, you > > > can do this by binding the raw device (/dev/raw) to /dev/hdc1 for > > > example. > > > > > > When I do that, I get a message that /dev/raw/raw1 has ben bound to char > > > major 22 1. When I try > > > > > > open("/dev/raw/raw1",O_RDWR|O_CREAT,S_IREAD|S_IWRITE); > > > > > > it fails. Can someone tell me how to do this please? > > > > > > Thanks, > > > Skip > > >

Nov. 10, 2001

Re: [Wlug] Raw IO Howto

by Skip Gaede

On Friday 09 November 2001 04:05 pm, Brad Noyes wrote: > Just a quick suggestion; open() sets perror(). try calling perror after > your open() call, it might give you (and us) some insite to why you can't > open the device. > Sorry about that! I get "No such file or device", which I also get if I do "ls /dev/raw/raw1" I have in /dev/{raw1,raw2...} If I change the code to open /dev/raw1, the open succeeds but the reads and writes then fail. Should I be able to see this mythical device in the /proc filesystem somewhere, cause I can't seem to find it... Thanks, Skip > On Fri, Nov 09, 2001 at 03:08:50PM -0500, Skip Gaede wrote: > > Folks, > > > > I'd like to be able to queue read/write request to my Zip drive and > > bypass the buffering that goes on in the kernel. From what I've read, you > > can do this by binding the raw device (/dev/raw) to /dev/hdc1 for > > example. > > > > When I do that, I get a message that /dev/raw/raw1 has ben bound to char > > major 22 1. When I try > > > > open("/dev/raw/raw1",O_RDWR|O_CREAT,S_IREAD|S_IWRITE); > > > > it fails. Can someone tell me how to do this please? > > > > Thanks, > > Skip > > > > > > > > > > > > _______________________________________________ > > Wlug mailing list > > Wlug(a)mail.wlug.org > > http://mail.wlug.org/mailman/listinfo/wlug > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

Nov. 9, 2001

Re: [Wlug] Raw IO Howto

by Brad Noyes

Just a quick suggestion; open() sets perror(). try calling perror after your open() call, it might give you (and us) some insite to why you can't open the device. On Fri, Nov 09, 2001 at 03:08:50PM -0500, Skip Gaede wrote: > Folks, > > I'd like to be able to queue read/write request to my Zip drive and bypass > the buffering that goes on in the kernel. From what I've read, you can do > this by binding the raw device (/dev/raw) to /dev/hdc1 for example. > > When I do that, I get a message that /dev/raw/raw1 has ben bound to char > major 22 1. When I try > > open("/dev/raw/raw1",O_RDWR|O_CREAT,S_IREAD|S_IWRITE); > > it fails. Can someone tell me how to do this please? > > Thanks, > Skip > > > > > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug

Nov. 9, 2001