mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-12-01 11:41:36 +00:00
100 lines
2.5 KiB
Go
100 lines
2.5 KiB
Go
package main
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import "flag"
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import "fmt"
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import "net"
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import "os"
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import "runtime/pprof"
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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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fmt.Println(iface.Name, addrIP)
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zone = iface.Name
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ip = &addrIP
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}
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if ip != nil { break }
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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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}
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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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laddr, err := net.ResolveUDPAddr("udp", "[::]:9001")
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if err != nil { panic(err) }
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sock, err := net.ListenUDP("udp", laddr)
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if err != nil { panic(err) }
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defer sock.Close()
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go func () {
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send, err := net.DialUDP("udp", nil, &addr)
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//send, err := net.ListenUDP("udp", nil)
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if err != nil { panic(err) }
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defer send.Close()
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msg := make([]byte, 1280)
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for {
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send.Write(msg)
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//send.WriteToUDP(msg, &addr)
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}
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}()
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numPackets := 1000000
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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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sock.ReadFromUDP(msg)
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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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var cpuprofile = flag.String("cpuprofile", "", "write cpu profile `file`")
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var memprofile = flag.String("memprofile", "", "write memory profile to this file")
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func main () {
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flag.Parse()
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if *cpuprofile != "" {
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f, err := os.Create(*cpuprofile)
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if err != nil {
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panic(fmt.Sprintf("could not create CPU profile: ", err))
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}
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if err := pprof.StartCPUProfile(f); err != nil {
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panic(fmt.Sprintf("could not start CPU profile: ", err))
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}
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defer pprof.StopCPUProfile()
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}
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if *memprofile != "" {
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f, err := os.Create(*memprofile)
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if err != nil {
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panic(fmt.Sprintf("could not create memory profile: ", err))
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}
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defer func () { pprof.WriteHeapProfile(f) ; f.Close() }()
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}
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basic_test()
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}
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