mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-11-22 15:20:30 +00:00
79 lines
1.7 KiB
Go
79 lines
1.7 KiB
Go
package main
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import "fmt"
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import "net"
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import "time"
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// TODO look into netmap + libpcap to bypass the kernel as much as possible
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func basic_test() {
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// TODO need a way to look up who our link-local neighbors are for each iface!
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var ip *net.IP
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ifaces, err := net.Interfaces()
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if err != nil { panic(err) }
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var zone string
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for _, iface := range ifaces {
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addrs, err := iface.Addrs()
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if err != nil { panic(err) }
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for _, addr := range addrs {
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addrIP, _, _ := net.ParseCIDR(addr.String())
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if addrIP.To4() != nil { continue } // IPv6 only
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if !addrIP.IsLinkLocalUnicast() { continue }
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zone = iface.Name
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ip = &addrIP
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}
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addrs, err = iface.MulticastAddrs()
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if err != nil { panic(err) }
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for _, addr := range addrs {
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fmt.Println(addr.String())
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}
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}
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if ip == nil { panic("No link-local IPv6 found") }
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fmt.Println("Using address:", *ip)
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addr := net.UDPAddr{IP: *ip, Port: 9001, Zone: zone}
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saddr := net.UDPAddr{IP: *ip, Port: 9002, Zone: zone}
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send, err := net.ListenUDP("udp", &saddr)
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defer send.Close()
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if err != nil { panic(err) }
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sock, err := net.ListenUDP("udp", &addr)
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defer sock.Close()
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if err != nil { panic(err) }
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const buffSize = 1048576*100
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send.SetWriteBuffer(buffSize)
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sock.SetReadBuffer(buffSize)
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sock.SetWriteBuffer(buffSize)
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go func () {
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msg := make([]byte, 1280)
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for {
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send.WriteTo(msg, &addr)
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}
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}()
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numPackets := 100000
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start := time.Now()
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msg := make([]byte, 2000)
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for i := 0 ; i < numPackets ; i++ {
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_, addr, _ := sock.ReadFrom(msg)
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sock.WriteTo(msg, addr)
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}
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timed := time.Since(start)
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fmt.Printf("%f packets per second\n", float64(numPackets)/timed.Seconds())
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}
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func main () {
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basic_test()
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}
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