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package p2p
import (
"fmt"
"math/rand"
"net"
"github.com/boozec/rahanna/internal/logger"
)
// Connect a DNS to get the address
func GetOutboundIP() net.IP {
log, _ := logger.GetLogger()
conn, err := net.Dial("udp", "8.8.8.8:80")
if err != nil {
log.Sugar().Error("err", err)
}
defer conn.Close()
localAddr := conn.LocalAddr().(*net.UDPAddr)
return localAddr.IP
}
// Returns a random available port on the node
func GetRandomAvailablePort() (int, error) {
for i := 0; i < 100; i += 1 {
port := rand.Intn(65535-1024) + 1024
addr := fmt.Sprintf(":%d", port)
ln, err := net.Listen("tcp", addr)
if err == nil {
defer ln.Close()
return port, nil
}
}
return 0, fmt.Errorf("failed to find an available port after multiple attempts")
}
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