Bug#606654: Busybox should include arping applet
A Sexta 10 Dezembro 2010 20:08:58 Ferenc Wagner você escreveu: Floris Bos b...@je-eigen-domein.nl writes: On Friday, December 10, 2010 05:12:39 pm Ferenc Wagner wrote: Floris Bos b...@je-eigen-domein.nl writes: I think the arping applet should be enabled in the Busybox build. It helps a great deal in debugging general network issues and could be helpful to create a solution for some other bugs like: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=537271 (network may not be usable as soon as link is up) http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606515 (Preseed installation does not wait for network to be ready) Please read http://wiki.debian.org/DebianInstaller/FAQ#Q.3AWhyispingnotavailableinth ede bugshell Roughly the same applies to arping. After all, you can cat /proc/net/arp to check whether the gateway has a complete entry. But wouldn't you need to initiate network communication before an entry in /proc/net/arp for the gateway appears? Yes, sure. Right now PXE preseed installations are broken, making Debian unsuitable for use by dedicated server providers. The Debian installer does not wait for the network link to come up (can take about 3 seconds on some NICs connected to a standard Gigabit switch), nor does it take into account that it can take 30 seconds before network activity is possible in spanning tree configurations. I agree that this is a problem, I've been bitten by this recently. A simply 1-line fix if we had arping might be executing between netcfg and network-preseed: arping -f -c 35 $GATEWAY_IP (wait until you get an ARP reply from the gateway, timeout after 35 seconds/tries). Something like that should go *into* netcfg, between configuring the network statically and querying the DNS for the name of the configured IP address. For DHCP, udhcpc should be invoked with -t 20 or similar, so that it doesn't just sleep most of the time but actually tries to get a license during the time allowed by the dialog timeout. I don't think calling wget 35 times, and grepping /proc/net/arp is a clean alternative, just to save 4 KB of space. wget isn't pretty, but one could do something like while [ $i -lt 30 ] ! nc -w 1 GATEWAY 80 -e /bin/true; do i=$(($i + 1)); done grep ^GATEWAY .* 00:00:00:00:00:00 /proc/net/arp echo fail for example. But netcfg is written in C, and this stuff belongs to there, where one could do even better. So should this BR be reassigned to netcfg as wishlist? -- Melhores cumprimentos/Best regards, Miguel Figueiredo http://www.DebianPT.org -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#606654: Busybox should include arping applet
Package: busybox-udeb Version: 1.10.2-2 I think the arping applet should be enabled in the Busybox build. It helps a great deal in debugging general network issues and could be helpful to create a solution for some other bugs like: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=537271 (network may not be usable as soon as link is up) http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606515 (Preseed installation does not wait for network to be ready) Yours sincerely, Floris Bos --- busybox-1.10.2/debian/config/config.udeb.orig 2010-12-10 16:13:59.0 +0100 +++ busybox-1.10.2/debian/config/config.udeb 2010-12-10 16:14:28.0 +0100 @@ -589,7 +589,7 @@ # CONFIG_FEATURE_PREFER_IPV4_ADDRESS is not set # CONFIG_VERBOSE_RESOLUTION_ERRORS is not set # CONFIG_ARP is not set -# CONFIG_ARPING is not set +CONFIG_ARPING=y # CONFIG_BRCTL is not set # CONFIG_FEATURE_BRCTL_FANCY is not set # CONFIG_DNSD is not set
Bug#606654: Busybox should include arping applet
Floris Bos b...@je-eigen-domein.nl writes: I think the arping applet should be enabled in the Busybox build. It helps a great deal in debugging general network issues and could be helpful to create a solution for some other bugs like: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=537271 (network may not be usable as soon as link is up) http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606515 (Preseed installation does not wait for network to be ready) Hi, Please read http://wiki.debian.org/DebianInstaller/FAQ#Q.3AWhyispingnotavailableinthedebugshell Roughly the same applies to arping. After all, you can cat /proc/net/arp to check whether the gateway has a complete entry. -- Cheers, Feri. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#606654: Busybox should include arping applet
Hi, On Friday, December 10, 2010 05:12:39 pm Ferenc Wagner wrote: Floris Bos b...@je-eigen-domein.nl writes: I think the arping applet should be enabled in the Busybox build. It helps a great deal in debugging general network issues and could be helpful to create a solution for some other bugs like: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=537271 (network may not be usable as soon as link is up) http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606515 (Preseed installation does not wait for network to be ready) Please read http://wiki.debian.org/DebianInstaller/FAQ#Q.3AWhyispingnotavailableinthede bugshell Roughly the same applies to arping. After all, you can cat /proc/net/arp to check whether the gateway has a complete entry. But wouldn't you need to initiate network communication before an entry in /proc/net/arp for the gateway appears? Right now PXE preseed installations are broken, making Debian unsuitable for use by dedicated server providers. The Debian installer does not wait for the network link to come up (can take about 3 seconds on some NICs connected to a standard Gigabit switch), nor does it take into account that it can take 30 seconds before network activity is possible in spanning tree configurations. A simply 1-line fix if we had arping might be executing between netcfg and network-preseed: arping -f -c 35 $GATEWAY_IP (wait until you get an ARP reply from the gateway, timeout after 35 seconds/tries). I don't think calling wget 35 times, and grepping /proc/net/arp is a clean alternative, just to save 4 KB of space. -- Yours sincerely, Floris Bos -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
Bug#606654: Busybox should include arping applet
Floris Bos b...@je-eigen-domein.nl writes: On Friday, December 10, 2010 05:12:39 pm Ferenc Wagner wrote: Floris Bos b...@je-eigen-domein.nl writes: I think the arping applet should be enabled in the Busybox build. It helps a great deal in debugging general network issues and could be helpful to create a solution for some other bugs like: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=537271 (network may not be usable as soon as link is up) http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606515 (Preseed installation does not wait for network to be ready) Please read http://wiki.debian.org/DebianInstaller/FAQ#Q.3AWhyispingnotavailableinthede bugshell Roughly the same applies to arping. After all, you can cat /proc/net/arp to check whether the gateway has a complete entry. But wouldn't you need to initiate network communication before an entry in /proc/net/arp for the gateway appears? Yes, sure. Right now PXE preseed installations are broken, making Debian unsuitable for use by dedicated server providers. The Debian installer does not wait for the network link to come up (can take about 3 seconds on some NICs connected to a standard Gigabit switch), nor does it take into account that it can take 30 seconds before network activity is possible in spanning tree configurations. I agree that this is a problem, I've been bitten by this recently. A simply 1-line fix if we had arping might be executing between netcfg and network-preseed: arping -f -c 35 $GATEWAY_IP (wait until you get an ARP reply from the gateway, timeout after 35 seconds/tries). Something like that should go *into* netcfg, between configuring the network statically and querying the DNS for the name of the configured IP address. For DHCP, udhcpc should be invoked with -t 20 or similar, so that it doesn't just sleep most of the time but actually tries to get a license during the time allowed by the dialog timeout. I don't think calling wget 35 times, and grepping /proc/net/arp is a clean alternative, just to save 4 KB of space. wget isn't pretty, but one could do something like while [ $i -lt 30 ] ! nc -w 1 GATEWAY 80 -e /bin/true; do i=$(($i + 1)); done grep ^GATEWAY .* 00:00:00:00:00:00 /proc/net/arp echo fail for example. But netcfg is written in C, and this stuff belongs to there, where one could do even better. -- Cheers, Feri. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of unsubscribe. Trouble? Contact listmas...@lists.debian.org
