How to use Fatal method of log Package

Best Syzkaller code snippet using log.Fatal

example_test.go

Source:example_test.go

...14)15func ExampleConn_markingTCP() {16	ln, err := net.Listen("tcp", "0.0.0.0:1024")17	if err != nil {18		log.Fatal(err)19	}20	defer ln.Close()21	for {22		c, err := ln.Accept()23		if err != nil {24			log.Fatal(err)25		}26		go func(c net.Conn) {27			defer c.Close()28			if c.RemoteAddr().(*net.TCPAddr).IP.To4() != nil {29				p := ipv4.NewConn(c)30				if err := p.SetTOS(0x28); err != nil { // DSCP AF1131					log.Fatal(err)32				}33				if err := p.SetTTL(128); err != nil {34					log.Fatal(err)35				}36			}37			if _, err := c.Write([]byte("HELLO-R-U-THERE-ACK")); err != nil {38				log.Fatal(err)39			}40		}(c)41	}42}43func ExamplePacketConn_servingOneShotMulticastDNS() {44	c, err := net.ListenPacket("udp4", "0.0.0.0:5353") // mDNS over UDP45	if err != nil {46		log.Fatal(err)47	}48	defer c.Close()49	p := ipv4.NewPacketConn(c)50	en0, err := net.InterfaceByName("en0")51	if err != nil {52		log.Fatal(err)53	}54	mDNSLinkLocal := net.UDPAddr{IP: net.IPv4(224, 0, 0, 251)}55	if err := p.JoinGroup(en0, &mDNSLinkLocal); err != nil {56		log.Fatal(err)57	}58	defer p.LeaveGroup(en0, &mDNSLinkLocal)59	if err := p.SetControlMessage(ipv4.FlagDst, true); err != nil {60		log.Fatal(err)61	}62	b := make([]byte, 1500)63	for {64		_, cm, peer, err := p.ReadFrom(b)65		if err != nil {66			log.Fatal(err)67		}68		if !cm.Dst.IsMulticast() || !cm.Dst.Equal(mDNSLinkLocal.IP) {69			continue70		}71		answers := []byte("FAKE-MDNS-ANSWERS") // fake mDNS answers, you need to implement this72		if _, err := p.WriteTo(answers, nil, peer); err != nil {73			log.Fatal(err)74		}75	}76}77func ExamplePacketConn_tracingIPPacketRoute() {78	// Tracing an IP packet route to www.google.com.79	const host = "www.google.com"80	ips, err := net.LookupIP(host)81	if err != nil {82		log.Fatal(err)83	}84	var dst net.IPAddr85	for _, ip := range ips {86		if ip.To4() != nil {87			dst.IP = ip88			fmt.Printf("using %v for tracing an IP packet route to %s\n", dst.IP, host)89			break90		}91	}92	if dst.IP == nil {93		log.Fatal("no A record found")94	}95	c, err := net.ListenPacket("ip4:1", "0.0.0.0") // ICMP for IPv496	if err != nil {97		log.Fatal(err)98	}99	defer c.Close()100	p := ipv4.NewPacketConn(c)101	if err := p.SetControlMessage(ipv4.FlagTTL|ipv4.FlagSrc|ipv4.FlagDst|ipv4.FlagInterface, true); err != nil {102		log.Fatal(err)103	}104	wm := icmp.Message{105		Type: ipv4.ICMPTypeEcho, Code: 0,106		Body: &icmp.Echo{107			ID:   os.Getpid() & 0xffff,108			Data: []byte("HELLO-R-U-THERE"),109		},110	}111	rb := make([]byte, 1500)112	for i := 1; i <= 64; i++ { // up to 64 hops113		wm.Body.(*icmp.Echo).Seq = i114		wb, err := wm.Marshal(nil)115		if err != nil {116			log.Fatal(err)117		}118		if err := p.SetTTL(i); err != nil {119			log.Fatal(err)120		}121		// In the real world usually there are several122		// multiple traffic-engineered paths for each hop.123		// You may need to probe a few times to each hop.124		begin := time.Now()125		if _, err := p.WriteTo(wb, nil, &dst); err != nil {126			log.Fatal(err)127		}128		if err := p.SetReadDeadline(time.Now().Add(3 * time.Second)); err != nil {129			log.Fatal(err)130		}131		n, cm, peer, err := p.ReadFrom(rb)132		if err != nil {133			if err, ok := err.(net.Error); ok && err.Timeout() {134				fmt.Printf("%v\t*\n", i)135				continue136			}137			log.Fatal(err)138		}139		rm, err := icmp.ParseMessage(1, rb[:n])140		if err != nil {141			log.Fatal(err)142		}143		rtt := time.Since(begin)144		// In the real world you need to determine whether the145		// received message is yours using ControlMessage.Src,146		// ControlMessage.Dst, icmp.Echo.ID and icmp.Echo.Seq.147		switch rm.Type {148		case ipv4.ICMPTypeTimeExceeded:149			names, _ := net.LookupAddr(peer.String())150			fmt.Printf("%d\t%v %+v %v\n\t%+v\n", i, peer, names, rtt, cm)151		case ipv4.ICMPTypeEchoReply:152			names, _ := net.LookupAddr(peer.String())153			fmt.Printf("%d\t%v %+v %v\n\t%+v\n", i, peer, names, rtt, cm)154			return155		default:156			log.Printf("unknown ICMP message: %+v\n", rm)157		}158	}159}160func ExampleRawConn_advertisingOSPFHello() {161	c, err := net.ListenPacket("ip4:89", "0.0.0.0") // OSPF for IPv4162	if err != nil {163		log.Fatal(err)164	}165	defer c.Close()166	r, err := ipv4.NewRawConn(c)167	if err != nil {168		log.Fatal(err)169	}170	en0, err := net.InterfaceByName("en0")171	if err != nil {172		log.Fatal(err)173	}174	allSPFRouters := net.IPAddr{IP: net.IPv4(224, 0, 0, 5)}175	if err := r.JoinGroup(en0, &allSPFRouters); err != nil {176		log.Fatal(err)177	}178	defer r.LeaveGroup(en0, &allSPFRouters)179	hello := make([]byte, 24) // fake hello data, you need to implement this180	ospf := make([]byte, 24)  // fake ospf header, you need to implement this181	ospf[0] = 2               // version 2182	ospf[1] = 1               // hello packet183	ospf = append(ospf, hello...)184	iph := &ipv4.Header{185		Version:  ipv4.Version,186		Len:      ipv4.HeaderLen,187		TOS:      0xc0, // DSCP CS6188		TotalLen: ipv4.HeaderLen + len(ospf),189		TTL:      1,190		Protocol: 89,191		Dst:      allSPFRouters.IP.To4(),192	}193	var cm *ipv4.ControlMessage194	switch runtime.GOOS {195	case "darwin", "linux":196		cm = &ipv4.ControlMessage{IfIndex: en0.Index}197	default:198		if err := r.SetMulticastInterface(en0); err != nil {199			log.Fatal(err)200		}201	}202	if err := r.WriteTo(iph, ospf, cm); err != nil {203		log.Fatal(err)204	}205}...

Fatal

Using AI Code Generation

1import (2func main() {3	log.Fatal("This is a Fatal message")4	fmt.Println("This is a message")5}6import (7func main() {8	log.Panic("This is a Panic message")9	fmt.Println("This is a message")10}11import (12func main() {13	log.Panicf("This is a %s message", "Panicf")14	fmt.Println("This is a message")15}16import (17func main() {18	log.Panicln("This is a Panicln message")19	fmt.Println("This is a message")20}21import (22func main() {23	log.Print("This is a Print message")24	fmt.Println("This is a message")25}26import (27func main() {28	log.Printf("This is a %s message", "Printf")29	fmt.Println("This is a message")30}31import (32func main() {33	log.Println("This is

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