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# TCP/UDP service
The framework provides the ability to create `TCP/UDP` services by default. You only need to perform a simple configuration, you can use it.
## Using TCP service
### Create TcpServer class
```php
< ?php
declare(strict_types=1);
namespace App\Controller;
use Hyperf\Contract\OnReceiveInterface;
class TcpServer implements OnReceiveInterface
{
public function onReceive($server, int $fd, int $reactorId, string $data): void
{
$server->send($fd, 'recv:' . $data);
}
}
```
### Create corresponding configuration
```php
< ?php
declare(strict_types=1);
use Hyperf\Server\Server;
use Hyperf\Server\Event;
return [
// The following has removed other irrelevant configuration items
'servers' => [
[
'name' => 'tcp',
'type' => Server::SERVER_BASE,
'host' => '0.0.0.0',
'port' => 9504,
'sock_type' => SWOOLE_SOCK_TCP,
'callbacks' => [
Event::ON_RECEIVE => [App\Controller\TcpServer::class, 'onReceive'],
],
'settings' => [
// Configure on demand
],
],
],
];
```
### Implement the client
```php
< ?php
$client = new \Swoole\Client(SWOOLE_SOCK_TCP);
$client->connect('127.0.0.1', 9504);
$client->send('Hello World.');
$ret = $client->recv(); // recv:Hello World.
```
## Using UDP service
### Create UdpServer class
> If there is no OnPacketInterface interface file, you can not implement this interface, and the running result is consistent with the implemented interface, as long as the configuration is correct.
```php
< ?php
declare(strict_types=1);
namespace App\Controller;
use Hyperf\Contract\OnPacketInterface;
class UdpServer implements OnPacketInterface
{
public function onPacket($server, $data, $clientInfo): void
{
var_dump($clientInfo);
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$server->sendto($clientInfo['address'], $clientInfo['port'], 'Server:' . $data);
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}
}
```
### Create corresponding configuration
```php
< ?php
declare(strict_types=1);
use Hyperf\Server\Server;
use Hyperf\Server\Event;
return [
// The following has removed other irrelevant configuration items
'servers' => [
[
'name' => 'udp',
'type' => Server::SERVER_BASE,
'host' => '0.0.0.0',
'port' => 9505,
'sock_type' => SWOOLE_SOCK_UDP,
'callbacks' => [
Event::ON_PACKET => [App\Controller\UdpServer::class, 'onPacket'],
],
'settings' => [
// Configure on demand
],
],
],
];
```
## event
| Events | Notes |
| :---------------: | :---------------: |
| Event::ON_CONNECT | Listen for connection incoming events |
| Event::ON_RECEIVE | Monitor data reception event |
| Event::ON_CLOSE | Listen for connection close events |
| Event::ON_PACKET | UDP data receiving event |
