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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="GENERATOR" content="Mozilla/4.7 [en] (X11; U; Linux 2.2.10 i686) [Netscape]">
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</head>
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<body>
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<center>
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<h1>
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TCP/IP Networking for eCos</h1></center>
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eCos now provides a complete TCP/IP networking stack. This package
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was derived from the latest stable release of <a href="http://www.openbsd.org/">OpenBSD</a>.
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At this time, the networking support is considered "beta" quality although
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it is already fully featured and well tested within the eCos environment.
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<p>Ethernet drivers are provided for these standard supported platforms:
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<blockquote>
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<li>
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Motorola PowerPC MBX/860</li>
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<li>
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Cirrus Logic EDB72xx</li>
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</blockquote>
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Other drivers for supported platforms are planned or underway.
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<h4>
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Networking Stack Features</h4>
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Since this networking package is based on the venerable BSD code, it is
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very complete and robust. The eCos implementation includes support
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for these protocols:
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<blockquote>
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<li>
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IPv4</li>
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<li>
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UDP</li>
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<li>
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TCP</li>
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<li>
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ICMP</li>
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<li>
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raw packet interface</li>
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</blockquote>
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These additional features are also present in the package. However
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they are not yet supported:
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<blockquote>
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<li>
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Berkeley Packet Filter</li>
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<li>
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Multi-cast and uni-cast support, including multi-casting routing</li>
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<li>
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IPv6</li>
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</blockquote>
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<h4>
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Provided Documentation</h4>
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Since the networking package is "beta", documentation is still a bit thin.
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However, you will find a complete set of pages documenting the supported
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networking functions (user code API) <a href="tcpip_library.html">here</a>.
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<h4>
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Ethernet Driver Design</h4>
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Note: Currently, the networking stack only supports ethernet based networking.
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<p>The network drivers use a two-layer design. One layer is hardware
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independent but contains all the stack specific code. The other layer
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is platform dependent and communicates with the hardware independent layer
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via a very simple API. In this way, hardware device drivers can actually
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be used with other stacks, if the same API can be provided by that stack.
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We designed the drivers this way to encourage the development of other
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stacks in eCos while allowing reuse of the actual hardware specific code.
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<p>Complete documentation of the ethernet device driver and the associated
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API can be found in the file <tt>net/drivers/eth/common/<i>version</i>/doc/driver_doc</tt>.
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<h4>
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Sample Code</h4>
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Many examples using the networking support are provided. These are
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arranged as eCos test programs, primarily for us to verify the package,
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but also can serve as useful frameworks for program design. We have
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taken a <i>KISS </i>approach to building programs which use the network.
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A single include file <tt><network.h></tt> is all that is required to
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access the stack. A complete, annotated test program can be found
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<a href="sample_program.html">here</a>.
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<br>
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<br>
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</body>
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</html>
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