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<!-- Copyright (C) 2003 Red Hat, Inc. --> <!-- This material may be distributed only subject to the terms --> <!-- and conditions set forth in the Open Publication License, v1.0 --> <!-- or later (the latest version is presently available at --> <!-- http://www.opencontent.org/openpub/). --> <!-- Distribution of the work or derivative of the work in any --> <!-- standard (paper) book form is prohibited unless prior --> <!-- permission is obtained from the copyright holder. --> <HTML ><HEAD ><TITLE >Support Features</TITLE ><meta name="MSSmartTagsPreventParsing" content="TRUE"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="eCos Reference Manual" HREF="ecos-ref.html"><LINK REL="UP" TITLE="TCP/IP Stack Support for eCos" HREF="net-common-tcpip.html"><LINK REL="PREVIOUS" TITLE="Maintenance Tools " HREF="net-common-maintenance-tools.html"><LINK REL="NEXT" TITLE="DHCP" HREF="net-common-dhcp.html"></HEAD ><BODY CLASS="CHAPTER" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >eCos Reference Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="net-common-maintenance-tools.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="net-common-dhcp.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="CHAPTER" ><H1 ><A NAME="NET-COMMON-SUPPORT">Chapter 37. Support Features</H1 ><DIV CLASS="TOC" ><DL ><DT ><B >Table of Contents</B ></DT ><DT ><A HREF="net-common-support.html#NET-COMMON-TFTP" >TFTP</A ></DT ><DT ><A HREF="net-common-dhcp.html" >DHCP</A ></DT ></DL ></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="NET-COMMON-TFTP">TFTP</H1 ><P >The TFTP client and server are described in <TT CLASS="FILENAME" >tftp_support.h</TT >; the client API is simple and can be easily understood by reading <TT CLASS="FILENAME" >tftp_client_test.c</TT >.</P ><P >The server is more complex. It requires a filesystem implementation to be supplied by the user, and attached to the tftp server by means of a vector of function pointers:</P ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >struct tftpd_fileops { int (*open)(const char *, int); int (*close)(int); int (*write)(int, const void *, int); int (*read)(int, void *, int); };</PRE ></TD ></TR ></TABLE ><P >These functions have the obvious semantics. The structure describing the filesystem is an argument to the <TT CLASS="FUNCTION" >tftpd_start(int, struct tftpd_fileops *);</TT > call. The first argument is the port to use for the server.</P ><P >As discussed in the description of the tftp_server_test above, an example filesystem is provided in <TT CLASS="FILENAME" >net/common/<TT CLASS="REPLACEABLE" ><I >VERSION</I ></TT >/src/tftp_dummy_file.c</TT > for use by the tftp server test. The dummy filesystem is not a supported part of the network stack, it exists purely for demonstration purposes.</P ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="net-common-maintenance-tools.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ecos-ref.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="net-common-dhcp.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Maintenance Tools</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="net-common-tcpip.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >DHCP</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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