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pkg://klibc-1.4.10.tar.gz:580275/klibc-1.4.10/usr/kinit/ipconfig/  info  downloads


BOOTP/DHCP client for klibc


ipconfig [-c proto] [-d interface] [-n] [-p port] [-t timeout] [interface ...]

-c proto	Use PROTO as the configuration protocol for all
		interfaces, unless overridden by specific interfaces.
-d interface	Either the name of an interface, or a long spec.
-n		Do nothing - just print the configuration that would
		be performed.
-p port		Send bootp/dhcp broadcasts from PORT, to PORT - 1.
-t timeout	Give up on all unconfigured interfaces after TIMEOUT secs.

You can configure multiple interfaces by passing multiple interface
specs on the command line, or by using the special interface name
"all".  If you're autoconfiguring any interfaces, ipconfig will wait
until either all such interfaces have been configured, or the timeout

PROTO can be one of the following, which selects the autoconfiguration
protocol to use:

not specified	use all protocols (the default)
dhcp		use bootp and dhcp
bootp		use bootp only
rarp		use rarp (not currently supported)
none		no autoconfiguration - either static config, or none at all

An interface spec can be either short form, which is just the name of
an interface (eth0 or whatever), or long form.  The long form consists
of up to seven elements, separated by colons:


  <client-ip>	IP address of the client. If empty, the address will
                either be determined by RARP/BOOTP/DHCP. What protocol
                is used de- pends on the <autoconf> parameter. If this
                parameter is not empty, autoconf will be used.

  <server-ip>   IP address of the NFS server. If RARP is used to
                determine the client address and this parameter is NOT
                empty only replies from the specified server are
                accepted. To use different RARP and NFS server,
                specify your RARP server here (or leave it blank), and
                specify your NFS server in the `nfsroot' parameter
                (see above). If this entry is blank the address of the
                server is used which answered the RARP/BOOTP/DHCP

  <gw-ip>       IP address of a gateway if the server is on a different
                subnet. If this entry is empty no gateway is used and the
                server is assumed to be on the local network, unless a
                value has been received by BOOTP/DHCP.

  <netmask>     Netmask for local network interface. If this is empty,
                the netmask is derived from the client IP address assuming
                classful addressing, unless overridden in BOOTP/DHCP reply.

  <hostname>    Name of the client. If empty, the client IP address is
                used in ASCII notation, or the value received by

  <device>      Name of network device to use. If this is empty, all
                devices are used for RARP/BOOTP/DHCP requests, and the
                first one we receive a reply on is configured. If you
                have only one device, you can safely leave this blank.

  <autoconf>	Method to use for autoconfiguration. If this is either
                'rarp', 'bootp', or 'dhcp' the specified protocol is
                used.  If the value is 'both', 'all' or empty, all
                protocols are used.  'off', 'static' or 'none' means
                no autoconfiguration.

IP addresses and netmasks must be either absent (defaulting to zero)
or presented in dotted-quad notation.

An interface spec can be prefixed with either "ip=", "nfsaddrs=", both
of which are ignored.  These (along with the ugliness of the long
form) are present for compatibility with the in-kernel ipconfig code
from 2.4 and earlier kernels.

Here are a few examples of valid ipconfig command lines.

Enable the loopback interface:

Try to configure eth0 using bootp for up to 30 seconds:
    ipconfig -t 30 -c bootp eth0

Configure eth0 and eth1 using dhcp or bootp, and eth2 statically:
    ipconfig -c any eth0 eth1


From Russell's original README, and still true:

The code in main.c is yucky imho.  Needs cleaning.

Russell King (2002/10/22)
Bryan O'Sullivan (2003/04/29)
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