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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">
<chapter>
<header>
<copyright>
<year>1997</year>
<year>2018</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
</legalnotice>
<title>Getting Started</title>
<prepared></prepared>
<docno></docno>
<approved></approved>
<date></date>
<rev></rev>
<file>getting_started.xml</file>
</header>
<section>
<title>General Information</title>
<p>The <seealso marker="tftp#start/1">start/1</seealso> function starts
a daemon process listening for UDP packets on a port. When it
receives a request for read or write, it spawns a temporary server
process handling the transfer.</p>
<p>On the client side,
function <seealso marker="tftp#read_file/3">read_file/3</seealso>
and <seealso marker="tftp#write_file/3">write_file/3</seealso>
spawn a temporary client process establishing
contact with a TFTP daemon and perform the file transfer.</p>
<p><c>tftp</c> uses a callback module to handle the file
transfer. Two such callback modules are provided,
<c>tftp_binary</c> and <c>tftp_file</c>. See
<seealso marker="tftp#read_file/3">read_file/3</seealso> and
<seealso marker="tftp#write_file/3">write_file/3</seealso> for details.
You can also implement your own callback modules, see
<seealso marker="tftp#tftp_callback">CALLBACK FUNCTIONS</seealso>.
A callback module provided by
the user is registered using option <c>callback</c>, see
<seealso marker="tftp#options">DATA TYPES</seealso>.</p>
</section>
<section>
<title>Using the TFTP client and server</title>
<p>This is a simple example of starting the TFTP server and reading the content
of a sample file using the TFTP client.</p>
<p><em>Step 1.</em> Create a sample file to be used for the transfer:</p>
<code>
$ echo "Erlang/OTP 21" > file.txt
</code>
<p><em>Step 2.</em> Start the TFTP server:</p>
<code type="erl" >
1> {ok, Pid} = tftp:start([{port, 19999}]).
<![CDATA[{ok,<0.65.0>}]]>
</code>
<p><em>Step 3.</em> Start the TFTP client (in another shell):</p>
<code type="erl" >
1> tftp:read_file("file.txt", binary, [{port, 19999}]).
<![CDATA[{ok,<<"Erlang/OTP 21\n">>}]]>
</code>
</section>
</chapter>
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