2 Getting Started
2.1 General Information
The start/1 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.
On the client side, function read_file/3 and write_file/3 spawn a temporary client process establishing contact with a TFTP daemon and perform the file transfer.
tftp uses a callback module to handle the file transfer. Two such callback modules are provided, tftp_binary and tftp_file. See read_file/3 and write_file/3 for details. You can also implement your own callback modules, see CALLBACK FUNCTIONS. A callback module provided by the user is registered using option callback, see DATA TYPES.
2.2 Using the TFTP client and server
This is a simple example of starting the TFTP server and reading the content of a sample file using the TFTP client.
Step 1. Create a sample file to be used for the transfer:
$ echo "Erlang/OTP 21" > file.txt
Step 2. Start the TFTP server:
1> {ok, Pid} = tftp:start([{port, 19999}]).
{ok,<0.65.0>}Step 3. Start the TFTP client (in another shell):
1> tftp:read_file("file.txt", binary, [{port, 19999}]).
{ok,<<"Erlang/OTP 21\n">>}