client.go

package osc

import (
	"fmt"
	"net"
)

// Client enables you to send OSC packets. It sends OSC messages and bundles to
// the given IP address and port.
type Client struct {
	IP    string
	Port  int
	laddr *net.UDPAddr
}

// NewClient creates a new OSC client. The Client is used to send OSC
// messages and OSC bundles over an UDP network connection. The `ip` argument
// specifies the IP address and `port` defines the target port where the
// messages and bundles will be send to.
func NewClient(ip string, port int) *Client {
	return &Client{
		IP:    ip,
		Port:  port,
		laddr: nil,
	}
}

// SetLocalAddr sets the local address.
func (c *Client) SetLocalAddr(ip string, port int) error {
	laddr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", ip, port))
	if err != nil {
		return err
	}

	c.laddr = laddr

	return nil
}

// Send sends an OSC Bundle or an OSC Message.
func (c *Client) Send(packet Packet) error {
	addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", c.IP, c.Port))
	if err != nil {
		return err
	}

	conn, err := net.DialUDP("udp", c.laddr, addr)
	if err != nil {
		return err
	}

	defer conn.Close()

	data, err := packet.MarshalBinary()
	if err != nil {
		return err
	}

	_, err = conn.Write(data)

	return err
}