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diff --git a/networking/udhcp/README.udhcpc b/networking/udhcp/README.udhcpc deleted file mode 100644 index 0417ff2ab..000000000 --- a/networking/udhcp/README.udhcpc +++ /dev/null @@ -1,144 +0,0 @@ -udhcp client (udhcpc) --------------------- - -The udhcp client negotiates a lease with the DHCP server and notifies -a set of scripts when a leases is obtained or lost. - - -command line options -------------------- - -The command line options for the udhcp client are: - --c, --clientid=CLIENTID Set client identifier. Type is first char. --C, --clientid-none Suppress default client identifier --V, --vendorclass=CLASSID Set vendor class identifier --H, --hostname=HOSTNAME Client hostname --h, Alias for -H --F, --fqdn=FQDN Client fully qualified domain name --f, --foreground Do not fork after getting lease --b, --background Fork to background if lease cannot be - immediately negotiated. --i, --interface=INTERFACE Interface to use (default: eth0) --n, --now Exit with failure if lease cannot be - immediately negotiated. --p, --pidfile=file Store process ID of daemon in file --q, --quit Quit after obtaining lease --r, --request=IP IP address to request (default: none) --s, --script=file Run file at dhcp events (default: - /usr/share/udhcpc/default.script) --v, --version Display version - - -If the requested IP address cannot be obtained, the client accepts the -address that the server offers. - - -udhcp client scripts -------------------- - -When an event occurs, udhcpc calls the action script. udhcpc never does -any configuration of the network interface itself, but instead relies on -a set of scripts. The script by default is -/usr/share/udhcpc/default.script but this can be changed via the command -line arguments. The three possible arguments to the script are: - - deconfig: This argument is used when udhcpc starts, and - when a leases is lost. The script must put the interface in an - up, but deconfigured state, ie: ifconfig $interface 0.0.0.0. - - bound: This argument is used when udhcpc moves from an - unbound, to a bound state. All of the paramaters are set in - enviromental variables, The script should configure the interface, - and set any other relavent parameters (default gateway, dns server, - etc). - - renew: This argument is used when a DHCP lease is renewed. All of - the paramaters are set in enviromental variables. This argument is - used when the interface is already configured, so the IP address, - will not change, however, the other DHCP paramaters, such as the - default gateway, subnet mask, and dns server may change. - - nak: This argument is used with udhcpc receives a NAK message. - The script with the deconfig argument will be called directly - afterwards, so no changes to the network interface are neccessary. - This hook is provided for purely informational purposes (the - message option may contain a reason for the NAK). - -The paramaters for enviromental variables are as follows: - - $HOME - The set $HOME env or "/" - $PATH - the set $PATH env or "/bin:/usr/bin:/sbin:/usr/sbin" - $1 - What action the script should perform - interface - The interface this was obtained on - ip - The obtained IP - mask - The number of bits in the netmask (ie: 24) - siaddr - The bootp next server option - sname - The bootp server name option - boot_file - The bootp boot file option - subnet - The assigend subnet mask - timezone - Offset in seconds from UTC - router - A list of routers - timesvr - A list of time servers - namesvr - A list of IEN 116 name servers - dns - A list of DNS server - logsvr - A list of MIT-LCS UDP log servers - cookiesvr - A list of RFC 865 cookie servers - lprsvr - A list of LPR servers - hostname - The assigned hostname - bootsize - The length in 512 octect blocks of the bootfile - domain - The domain name of the network - swapsvr - The IP address of the client's swap server - rootpath - The path name of the client's root disk - ipttl - The TTL to use for this network - mtu - The MTU to use for this network - broadcast - The broadcast address for this network - ntpsrv - A list of NTP servers - wins - A list of WINS servers - lease - The lease time, in seconds - dhcptype - DHCP message type (safely ignored) - serverid - The IP of the server - message - Reason for a DHCPNAK - tftp - The TFTP server name - bootfile - The bootfile name - -additional options are easily added in options.c. - - -note on udhcpc's random seed ---------------------------- - -udhcpc will seed its random number generator (used for generating xid's) -by reading /dev/urandom. If you have a lot of embedded systems on the same -network, with no entropy, you can either seed /dev/urandom by a method of -your own, or doing the following on startup: - -ifconfig eth0 > /dev/urandom - -in order to seed /dev/urandom with some data (mac address) unique to your -system. If reading /dev/urandom fails, udhcpc will fall back to its old -behavior of seeding with time(0). - - -signals accepted by udhcpc -------------------------- - -udhcpc also responds to SIGUSR1 and SIGUSR2. SIGUSR1 will force a renew state, -and SIGUSR2 will force a release of the current lease, and cause udhcpc to -go into an inactive state (until it is killed, or receives a SIGUSR1). You do -not need to sleep between sending signals, as signals received are processed -sequencially in the order they are received. - - -compile time options -------------------- - -options.c contains a set of dhcp options for the client: - - name[10]: The name of the option as it will appear in scripts - - flags: The type of option, as well as if it will be requested - by the client (OPTION_REQ) - - code: The DHCP code for this option - |