yggdrasil-go/misc/tests/multicast.go
2017-12-28 22:16:20 -06:00

50 lines
1.1 KiB
Go

package main
import "fmt"
import "net"
import "time"
// TODO look into netmap + libpcap to bypass the kernel as much as possible
func basic_test() {
// TODO need a way to look up who our link-local neighbors are for each iface!
//addr, err := net.ResolveUDPAddr("udp", "[ff02::1%veth0]:9001")
addr, err := net.ResolveUDPAddr("udp", "[ff02::1]:9001")
if err != nil { panic(err) }
sock, err := net.ListenMulticastUDP("udp", nil, addr)
if err != nil { panic(err) }
defer sock.Close()
go func () {
saddr, err := net.ResolveUDPAddr("udp", "[::]:0")
if err != nil { panic(err) }
send, err := net.ListenUDP("udp", saddr)
if err != nil { panic(err) }
defer send.Close()
msg := make([]byte, 1280)
for {
//fmt.Println("Sending...")
send.WriteTo(msg, addr)
}
}()
numPackets := 1000
start := time.Now()
msg := make([]byte, 2000)
for i := 0 ; i < numPackets ; i++ {
//fmt.Println("Reading:", i)
sock.ReadFromUDP(msg)
}
timed := time.Since(start)
fmt.Printf("%f packets per second\n", float64(numPackets)/timed.Seconds())
}
func main () {
basic_test()
}