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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<!-- 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/).                           -->
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><HR
ALIGN="LEFT"
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><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 (&#0042;open)(const char &#0042;, int);
             int (&#0042;close)(int);
             int (&#0042;write)(int, const void &#0042;, int);
             int (&#0042;read)(int, void &#0042;, 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 &#0042;);</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
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>

Line No.	Rev	Author	Line
1	1254	phoenix	`<!-- Copyright (C) 2003 Red Hat, Inc. -->`
2			`<!-- This material may be distributed only subject to the terms -->`
3			`<!-- and conditions set forth in the Open Publication License, v1.0 -->`
4			`<!-- or later (the latest version is presently available at -->`
5			`<!-- http://www.opencontent.org/openpub/). -->`
6			`<!-- Distribution of the work or derivative of the work in any -->`
7			`<!-- standard (paper) book form is prohibited unless prior -->`
8			`<!-- permission is obtained from the copyright holder. -->`
9			`<HTML`
10			`><HEAD`
11			`><TITLE`
12			`>Support Features</TITLE`
13			`><meta name="MSSmartTagsPreventParsing" content="TRUE">`
14			`<META`
15			`NAME="GENERATOR"`
16			`CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+`
17			`"><LINK`
18			`REL="HOME"`
19			`TITLE="eCos Reference Manual"`
20			`HREF="ecos-ref.html"><LINK`
21			`REL="UP"`
22			`TITLE="TCP/IP Stack Support for eCos"`
23			`HREF="net-common-tcpip.html"><LINK`
24			`REL="PREVIOUS"`
25			`TITLE="Maintenance Tools "`
26			`HREF="net-common-maintenance-tools.html"><LINK`
27			`REL="NEXT"`
28			`TITLE="DHCP"`
29			`HREF="net-common-dhcp.html"></HEAD`
30			`><BODY`
31			`CLASS="CHAPTER"`
32			`BGCOLOR="#FFFFFF"`
33			`TEXT="#000000"`
34			`LINK="#0000FF"`
35			`VLINK="#840084"`
36			`ALINK="#0000FF"`
37			`><DIV`
38			`CLASS="NAVHEADER"`
39			`><TABLE`
40			`SUMMARY="Header navigation table"`
41			`WIDTH="100%"`
42			`BORDER="0"`
43			`CELLPADDING="0"`
44			`CELLSPACING="0"`
45			`><TR`
46			`><TH`
47			`COLSPAN="3"`
48			`ALIGN="center"`
49			`>eCos Reference Manual</TH`
50			`></TR`
51			`><TR`
52			`><TD`
53			`WIDTH="10%"`
54			`ALIGN="left"`
55			`VALIGN="bottom"`
56			`><A`
57			`HREF="net-common-maintenance-tools.html"`
58			`ACCESSKEY="P"`
59			`>Prev</A`
60			`></TD`
61			`><TD`
62			`WIDTH="80%"`
63			`ALIGN="center"`
64			`VALIGN="bottom"`
65			`></TD`
66			`><TD`
67			`WIDTH="10%"`
68			`ALIGN="right"`
69			`VALIGN="bottom"`
70			`><A`
71			`HREF="net-common-dhcp.html"`
72			`ACCESSKEY="N"`
73			`>Next</A`
74			`></TD`
75			`></TR`
76			`></TABLE`
77			`><HR`
78			`ALIGN="LEFT"`
79			`WIDTH="100%"></DIV`
80			`><DIV`
81			`CLASS="CHAPTER"`
82			`><H1`
83			`><A`
84			`NAME="NET-COMMON-SUPPORT">Chapter 37. Support Features</H1`
85			`><DIV`
86			`CLASS="TOC"`
87			`><DL`
88			`><DT`
89			`><B`
90			`>Table of Contents</B`
91			`></DT`
92			`><DT`
93			`><A`
94			`HREF="net-common-support.html#NET-COMMON-TFTP"`
95			`>TFTP</A`
96			`></DT`
97			`><DT`
98			`><A`
99			`HREF="net-common-dhcp.html"`
100			`>DHCP</A`
101			`></DT`
102			`></DL`
103			`></DIV`
104			`><DIV`
105			`CLASS="SECT1"`
106			`><H1`
107			`CLASS="SECT1"`
108			`><A`
109			`NAME="NET-COMMON-TFTP">TFTP</H1`
110			`><P`
111			`>The TFTP client and server are described in`
112			`<TT`
113			`CLASS="FILENAME"`
114			`>tftp_support.h</TT`
115			`>;`
116			`the client API is simple and can be easily understood by reading`
117			`<TT`
118			`CLASS="FILENAME"`
119			`>tftp_client_test.c</TT`
120			`>.</P`
121			`><P`
122			`>The server is more complex. It requires a filesystem implementation`
123			`to be supplied by the user, and attached to the tftp server by means`
124			`of a vector of function pointers:</P`
125			`><TABLE`
126			`BORDER="5"`
127			`BGCOLOR="#E0E0F0"`
128			`WIDTH="70%"`
129			`><TR`
130			`><TD`
131			`><PRE`
132			`CLASS="PROGRAMLISTING"`
133			`>struct tftpd_fileops {`
134			`int (open)(const char , int);`
135			`int (*close)(int);`
136			`int (write)(int, const void , int);`
137			`int (read)(int, void , int);`
138			`};</PRE`
139			`></TD`
140			`></TR`
141			`></TABLE`
142			`><P`
143			`>These functions have the obvious semantics. The structure`
144			`describing the filesystem is an argument to the <TT`
145			`CLASS="FUNCTION"`
146			`>tftpd_start(int,`
147			`struct tftpd_fileops *);</TT`
148			`> call.`
149			`The first argument is the port to use for the server.</P`
150			`><P`
151			`>As discussed in the description of the tftp_server_test`
152			`above, an example filesystem is provided in`
153			`<TT`
154			`CLASS="FILENAME"`
155			`>net/common/<TT`
156			`CLASS="REPLACEABLE"`
157			`><I`
158			`>VERSION</I`
159			`></TT`
160			`>/src/tftp_dummy_file.c</TT`
161			`>`
162			`for`
163			`use by the tftp server test. The dummy filesystem is not a supported`
164			`part of the network stack, it exists purely for demonstration purposes.</P`
165			`></DIV`
166			`></DIV`
167			`><DIV`
168			`CLASS="NAVFOOTER"`
169			`><HR`
170			`ALIGN="LEFT"`
171			`WIDTH="100%"><TABLE`
172			`SUMMARY="Footer navigation table"`
173			`WIDTH="100%"`
174			`BORDER="0"`
175			`CELLPADDING="0"`
176			`CELLSPACING="0"`
177			`><TR`
178			`><TD`
179			`WIDTH="33%"`
180			`ALIGN="left"`
181			`VALIGN="top"`
182			`><A`
183			`HREF="net-common-maintenance-tools.html"`
184			`ACCESSKEY="P"`
185			`>Prev</A`
186			`></TD`
187			`><TD`
188			`WIDTH="34%"`
189			`ALIGN="center"`
190			`VALIGN="top"`
191			`><A`
192			`HREF="ecos-ref.html"`
193			`ACCESSKEY="H"`
194			`>Home</A`
195			`></TD`
196			`><TD`
197			`WIDTH="33%"`
198			`ALIGN="right"`
199			`VALIGN="top"`
200			`><A`
201			`HREF="net-common-dhcp.html"`
202			`ACCESSKEY="N"`
203			`>Next</A`
204			`></TD`
205			`></TR`
206			`><TR`
207			`><TD`
208			`WIDTH="33%"`
209			`ALIGN="left"`
210			`VALIGN="top"`
211			`>Maintenance Tools</TD`
212			`><TD`
213			`WIDTH="34%"`
214			`ALIGN="center"`
215			`VALIGN="top"`
216			`><A`
217			`HREF="net-common-tcpip.html"`
218			`ACCESSKEY="U"`
219			`>Up</A`
220			`></TD`
221			`><TD`
222			`WIDTH="33%"`
223			`ALIGN="right"`
224			`VALIGN="top"`
225			`>DHCP</TD`
226			`></TR`
227			`></TABLE`
228			`></DIV`
229			`></BODY`
230			`></HTML`
231			`>`

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