From f5ecd43473353ae18421f487284eee085c203052 Mon Sep 17 00:00:00 2001 From: Russ Dill Date: Thu, 31 Oct 2002 19:21:27 +0000 Subject: sync to udhcp 0.9.8 --- networking/udhcp/README.udhcpd | 59 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 networking/udhcp/README.udhcpd (limited to 'networking/udhcp/README.udhcpd') diff --git a/networking/udhcp/README.udhcpd b/networking/udhcp/README.udhcpd new file mode 100644 index 000000000..bc6137de3 --- /dev/null +++ b/networking/udhcp/README.udhcpd @@ -0,0 +1,59 @@ +udhcp server (udhcpd) +-------------------- + +The only command line argument to udhcpd is an optional specifed +config file. If no config file is specified, udhcpd uses the default +config file, /etc/udhcpd.conf. Ex: + +udhcpd /etc/udhcpd.eth1.conf + +The udhcp server employs a number of simple config files: + +udhcpd.leases +------------ + +The udhcpd.leases behavior is designed for an embedded system. The +file is written either every auto_time seconds, or when a SIGUSR1 +is received (the auto_time timer restarts if a SIGUSR1 is received). +If you send a SIGTERM to udhcpd directly after a SIGUSR1, udhcpd will +finish writing the leases file and wait for the aftermentioned script +to be executed and finish before quiting, so you do not need to sleep +between sending signals. When the file is written, a script can be +optionally called to commit the file to flash. Lease times are stored +in the file by time remaining in lease (for systems without clock +that works when there is no power), or by the absolute time that it +expires in seconds from epoch. In the remaining format, expired leases +are stored as zero. The file is of the format: + +16 byte MAC +4 byte ip address +u32 expire time +16 byte MAC +4 byte ip address +u32 expire time +. +etc. + +example: hexdump udhcpd.leases + +0000000 1000 c95a 27d9 0000 0000 0000 0000 0000 +0000010 a8c0 150a 0d00 2d29 5000 23fc 8566 0000 +0000020 0000 0000 0000 0000 a8c0 140a 0d00 4e29 +0000030 + + +udhcpd.conf +---------- + +The format is fairly simple, there is a sample file with all the +available options and comments describing them in samples/udhcpd.conf + +compile time options +------------------- + +dhcpd.h contains the other two compile time options: + + LEASE_TIME: The default lease time if not specified in the config + file. + + DHCPD_CONFIG_FILE: The defualt config file to use. -- cgit v1.2.3