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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<HTML
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><HEAD
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><TITLE
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>Support Features</TITLE
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><meta name="MSSmartTagsPreventParsing" content="TRUE">
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<META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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"><LINK
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REL="HOME"
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TITLE="eCos Reference Manual"
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HREF="ecos-ref.html"><LINK
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REL="UP"
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TITLE="TCP/IP Stack Support for eCos"
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HREF="net-common-tcpip.html"><LINK
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REL="PREVIOUS"
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TITLE="Maintenance Tools "
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HREF="net-common-maintenance-tools.html"><LINK
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REL="NEXT"
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TITLE="DHCP"
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HREF="net-common-dhcp.html"></HEAD
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><BODY
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CLASS="CHAPTER"
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SUMMARY="Header navigation table"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>eCos Reference Manual</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="net-common-maintenance-tools.html"
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>Prev</A
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WIDTH="10%"
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HREF="net-common-dhcp.html"
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>Next</A
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></TD
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><HR
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WIDTH="100%"></DIV
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><DIV
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CLASS="CHAPTER"
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><H1
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><A
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NAME="NET-COMMON-SUPPORT">Chapter 37. Support Features</H1
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><DIV
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CLASS="TOC"
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><DL
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><DT
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><B
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>Table of Contents</B
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></DT
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><DT
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><A
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HREF="net-common-support.html#NET-COMMON-TFTP"
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>TFTP</A
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></DT
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><DT
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><A
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HREF="net-common-dhcp.html"
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>DHCP</A
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></DT
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></DL
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></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="NET-COMMON-TFTP">TFTP</H1
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><P
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>The TFTP client and server are described in
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<TT
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CLASS="FILENAME"
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>tftp_support.h</TT
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>;
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the client API is simple and can be easily understood by reading
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<TT
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CLASS="FILENAME"
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>tftp_client_test.c</TT
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>.</P
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><P
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>The server is more complex.  It requires a filesystem implementation
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to be supplied by the user, and attached to the tftp server by means
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of a vector of function pointers:</P
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><TABLE
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>struct tftpd_fileops {
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             int (&#0042;open)(const char &#0042;, int);
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             int (&#0042;close)(int);
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             int (&#0042;write)(int, const void &#0042;, int);
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             int (&#0042;read)(int, void &#0042;, int);
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};</PRE
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></TD
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></TR
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></TABLE
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><P
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>These functions have the obvious semantics.  The structure
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describing the filesystem is an argument to the <TT
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CLASS="FUNCTION"
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>tftpd_start(int,
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struct tftpd_fileops &#0042;);</TT
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> call.
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 The first argument is the port to use for the server.</P
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><P
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>As discussed in the description of the tftp_server_test
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above, an example filesystem is provided in
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<TT
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CLASS="FILENAME"
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>net/common/<TT
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CLASS="REPLACEABLE"
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><I
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>VERSION</I
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></TT
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>/src/tftp_dummy_file.c</TT
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>
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for
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use by the tftp server test.  The dummy filesystem is not a supported
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part of the network stack, it exists purely for demonstration purposes.</P
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></DIV
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HREF="net-common-maintenance-tools.html"
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>Prev</A
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WIDTH="34%"
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ALIGN="center"
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HREF="ecos-ref.html"
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>Home</A
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HREF="net-common-dhcp.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Maintenance Tools</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="net-common-tcpip.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>DHCP</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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>

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