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- BOOTP/DHCP client for klibc
- ---------------------------
- Usage:
- ipconfig [-c proto] [-d interface] [-i identifier]
- [-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.
- -i identifier DHCP vendor class identifier. The default is
- "Linux ipconfig".
- -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
- passes.
- 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>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>
- <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
- request.
- <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
- BOOTP/DHCP.
- <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:
- ipconfig 127.0.0.1:::::lo:none
- 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 192.168.1.1:::::eth2:none
- --
- 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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