mirror of
https://github.com/jwetzell/showbridge-go.git
synced 2026-04-27 05:15:47 +00:00
111 lines
2.3 KiB
Go
111 lines
2.3 KiB
Go
package module
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"log"
|
|
"log/slog"
|
|
"net"
|
|
"time"
|
|
|
|
"github.com/jwetzell/showbridge-go/internal/config"
|
|
"github.com/jwetzell/showbridge-go/internal/route"
|
|
)
|
|
|
|
type UDPServer struct {
|
|
Addr *net.UDPAddr
|
|
config config.ModuleConfig
|
|
ctx context.Context
|
|
router route.RouteIO
|
|
}
|
|
|
|
func init() {
|
|
RegisterModule(ModuleRegistration{
|
|
Type: "net.udp.server",
|
|
New: func(ctx context.Context, config config.ModuleConfig, router route.RouteIO) (Module, error) {
|
|
params := config.Params
|
|
port, ok := params["port"]
|
|
if !ok {
|
|
return nil, fmt.Errorf("net.udp.server requires a port parameter")
|
|
}
|
|
|
|
portNum, ok := port.(float64)
|
|
|
|
if !ok {
|
|
return nil, fmt.Errorf("net.udp.server port must be a number")
|
|
}
|
|
|
|
ipString := "0.0.0.0"
|
|
|
|
ip, ok := params["ip"]
|
|
if ok {
|
|
|
|
specificIpString, ok := ip.(string)
|
|
|
|
if !ok {
|
|
return nil, fmt.Errorf("net.udp.server ip must be a string")
|
|
}
|
|
ipString = specificIpString
|
|
}
|
|
|
|
addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", ipString, uint16(portNum)))
|
|
if err != nil {
|
|
log.Fatalf("error resolving UDP address: %v", err)
|
|
}
|
|
|
|
return &UDPServer{Addr: addr, config: config, ctx: ctx, router: router}, nil
|
|
},
|
|
})
|
|
}
|
|
|
|
func (us *UDPServer) Id() string {
|
|
return us.config.Id
|
|
}
|
|
|
|
func (us *UDPServer) Type() string {
|
|
return us.config.Id
|
|
}
|
|
|
|
func (us *UDPServer) Run() error {
|
|
|
|
listener, err := net.ListenUDP("udp", us.Addr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
defer listener.Close()
|
|
|
|
// TODO(jwetzell): make buffer size configurable
|
|
buffer := make([]byte, 65535)
|
|
for {
|
|
select {
|
|
case <-us.ctx.Done():
|
|
// TODO(jwetzell): cleanup?
|
|
slog.Debug("router context done in module", "id", us.Id())
|
|
return nil
|
|
default:
|
|
listener.SetDeadline(time.Now().Add(time.Millisecond * 200))
|
|
|
|
numBytes, _, err := listener.ReadFromUDP(buffer)
|
|
if err != nil {
|
|
//NOTE(jwetzell) we hit deadline
|
|
if opErr, ok := err.(*net.OpError); ok && opErr.Timeout() {
|
|
continue
|
|
}
|
|
return err
|
|
}
|
|
message := buffer[:numBytes]
|
|
if us.router != nil {
|
|
us.router.HandleInput(us.Id(), message)
|
|
} else {
|
|
slog.Error("net.udp.server has no router", "id", us.Id())
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
func (us *UDPServer) Output(payload any) error {
|
|
return fmt.Errorf("net.udp.server output is not implemented")
|
|
}
|