Ethernet¶

This module implements a generic ethernet interface. To function correctly it needs an ethernet driver to be loaded, so that the module can use the driver to access the underlying hardware.

The link between the eth module and the ethernet driver is established without the programmer intervention by the driver itself.

gethostbyname(hostname)

Translate a host name to IPv4 address format. The IPv4 address is returned as a string, such as “192.168.0.5”.

select(rlist, wlist, xlist, timeout=None)

This is equivalent to the Unix select system call. The first three arguments are sequences of socket instances.

• rlist: wait until ready for reading

• wlist: wait until ready for writing

• xlist: wait for an “exceptional condition” (not supported by every wifi driver)

Empty sequences are allowed. The optional timeout argument specifies a time-out as an integer number in milliseconds. When the timeout argument is omitted the function blocks until at least one socket is ready. A timeout value of zero specifies a poll and never blocks.

The return value is a triple of lists of objects that are ready: subsets of the first three arguments. When the time-out is reached without a socket becoming ready, three empty lists are returned.

link()

Activate the Ethernet PHY and try to establish a link.

An exception can be raised if the link is not successful.

unlink()

Disable the Ethernet PHY and disconnect from the currently linked network.

is_linked()

Return True if linked

set_link_info(ip, mask, gw, dns)

Set desired eth interface parameters:

• ip, the static ipv4 address

• mask, the network mask

• gw, the default gateway

• dns, the default dns

If 0.0.0.0 is given, a default address will be used.

link_info()

Return information on the currently established link.

The result is a tuple where the elements are, in order:

• The assigned IP as a string

• The network mask as a string

• The gateway IP as a string

• The DNS IP as a string

• The MAC address of the eth interface as a sequence of 6 bytes