Chapter 4. Interfaces: Ethernet
4.1. Introduction
In Chapter 3 we discussed the data structures used by all interfaces and the initialization of those data structures. In this chapter we show how the Ethernet device driver operates once it has been initialized and is receiving and transmitting frames. The second half of this chapter covers the generic ioctl commands for configuring network devices. Chapter 5 covers the SLIP and loopback drivers.
We won’t go through the entire source code for the Ethernet driver, since it is around 1,000 lines of C code (half of which is concerned with the hardware details of one particular interface card), but we do look at the device-independent Ethernet code and how the driver interfaces ...
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