How to use generateCsumInet method of csource Package

Best Syzkaller code snippet using csource.generateCsumInet

csource.go

Source:csource.go

...298			case prog.ExecArgCsum:299				switch arg.Kind {300				case prog.ExecArgCsumInet:301					csumSeq++302					ctx.generateCsumInet(w, copyin.Addr, arg, csumSeq)303				default:304					panic(fmt.Sprintf("unknown csum kind %v", arg.Kind))305				}306			default:307				panic(fmt.Sprintf("bad argument type: %+v", arg))308			}309		}310		// Call itself.311		if ctx.opts.Fault && ctx.opts.FaultCall == ci {312			fmt.Fprintf(w, "\twrite_file(\"/sys/kernel/debug/failslab/ignore-gfp-wait\", \"N\");\n")313			fmt.Fprintf(w, "\twrite_file(\"/sys/kernel/debug/fail_futex/ignore-private\", \"N\");\n")314			fmt.Fprintf(w, "\tinject_fault(%v);\n", ctx.opts.FaultNth)315		}316		callName := call.Meta.CallName317		resCopyout := call.Index != prog.ExecNoCopyout318		argCopyout := len(call.Copyout) != 0319		emitCall := ctx.opts.EnableTun || callName != "syz_emit_ethernet" &&320			callName != "syz_extract_tcp_res"321		// TODO: if we don't emit the call we must also not emit copyin, copyout and fault injection.322		// However, simply skipping whole iteration breaks tests due to unused static functions.323		if emitCall {324			native := !strings.HasPrefix(callName, "syz_")325			fmt.Fprintf(w, "\t")326			if resCopyout || argCopyout {327				fmt.Fprintf(w, "res = ")328			}329			if native {330				fmt.Fprintf(w, "syscall(%v%v", ctx.sysTarget.SyscallPrefix, callName)331			} else {332				fmt.Fprintf(w, "%v(", callName)333			}334			for ai, arg := range call.Args {335				if native || ai > 0 {336					fmt.Fprintf(w, ", ")337				}338				switch arg := arg.(type) {339				case prog.ExecArgConst:340					fmt.Fprintf(w, "%v", ctx.constArgToStr(arg))341				case prog.ExecArgResult:342					fmt.Fprintf(w, "%v", ctx.resultArgToStr(arg))343				default:344					panic(fmt.Sprintf("unknown arg type: %+v", arg))345				}346			}347			fmt.Fprintf(w, ");\n")348		}349		// Copyout.350		if resCopyout || argCopyout {351			fmt.Fprintf(w, "\tif (res != -1)")352			copyoutMultiple := len(call.Copyout) > 1 || resCopyout && len(call.Copyout) > 0353			if copyoutMultiple {354				fmt.Fprintf(w, " {")355			}356			fmt.Fprintf(w, "\n")357			if resCopyout {358				fmt.Fprintf(w, "\t\tr[%v] = res;\n", call.Index)359			}360			for _, copyout := range call.Copyout {361				fmt.Fprintf(w, "\t\tNONFAILING(r[%v] = *(uint%v_t*)0x%x);\n",362					copyout.Index, copyout.Size*8, copyout.Addr)363			}364			if copyoutMultiple {365				fmt.Fprintf(w, "\t}\n")366			}367		}368		calls = append(calls, w.String())369	}370	return calls, p.Vars371}372func (ctx *context) generateCsumInet(w *bytes.Buffer, addr uint64, arg prog.ExecArgCsum, csumSeq int) {373	fmt.Fprintf(w, "\tstruct csum_inet csum_%d;\n", csumSeq)374	fmt.Fprintf(w, "\tcsum_inet_init(&csum_%d);\n", csumSeq)375	for i, chunk := range arg.Chunks {376		switch chunk.Kind {377		case prog.ExecArgCsumChunkData:378			fmt.Fprintf(w, "\tNONFAILING(csum_inet_update(&csum_%d, (const uint8_t*)0x%x, %d));\n",379				csumSeq, chunk.Value, chunk.Size)380		case prog.ExecArgCsumChunkConst:381			fmt.Fprintf(w, "\tuint%d_t csum_%d_chunk_%d = 0x%x;\n",382				chunk.Size*8, csumSeq, i, chunk.Value)383			fmt.Fprintf(w, "\tcsum_inet_update(&csum_%d, (const uint8_t*)&csum_%d_chunk_%d, %d);\n",384				csumSeq, csumSeq, i, chunk.Size)385		default:386			panic(fmt.Sprintf("unknown checksum chunk kind %v", chunk.Kind))...

generateCsumInet

Using AI Code Generation

1import (2var (3func main() {4    handle, err = pcap.OpenLive(device, snapshot_len, promiscuous, timeout)5    if err != nil {6        log.Fatal(err)7    }8    defer handle.Close()9    err = handle.SetBPFFilter(filter)10    if err != nil {11        log.Fatal(err)12    }13    fmt.Println("Only capturing TCP port 80 packets.")14    packetSource := gopacket.NewPacketSource(handle, handle.LinkType())15    for packet := range packetSource.Packets() {16        if ethLayer := packet.Layer(layers.LayerTypeEthernet); ethLayer != nil {17            fmt.Println("Ethernet layer detected.")18            eth, _ = ethLayer.(*layers.Ethernet)19            fmt.Println("Source MAC:", eth.SrcMAC)20            fmt.Println("Destination MAC:", eth.DstMAC)21            fmt.Println("Ethernet type:", eth.EthernetType)22            fmt.Println()23        }24        if ipLayer := packet.Layer(layers.LayerTypeIPv4); ipLayer != nil

generateCsumInet

Using AI Code Generation

1import (2func main() {3  fmt.Println(layers.GenerateCsumInet([]byte{0x45, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00, 0x00, 0x40, 0x06, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x01, 0x0a, 0x00, 0x00, 0x02}, 0))4}5import (6func main() {7  fmt.Println(layers.GenerateCsumInet([]byte{0x45, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00, 0x00, 0x40, 0x06, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x01, 0x0a, 0x00, 0x00, 0x02}, 0))8}9import (10func main() {11  fmt.Println(layers.GenerateCsumInet([]byte{0x45, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00, 0x00, 0x40, 0x06, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x01, 0x0a, 0x00, 0x00, 0x02}, 0))12}

generateCsumInet

Using AI Code Generation

1import (2func main() {3	bpfModule := bcc.NewModuleFromSource(csource)4	defer bpfModule.Close()5	kprobe, err := bpfModule.LoadKprobe("kprobe__inet_csk_route_req")6	if err != nil {7		fmt.Fprintf(os.Stderr, "Failed to load kprobe__inet_csk_route_req: %s\n", err)8		os.Exit(1)9	}10	err = bpfModule.AttachKprobe("inet_csk_route_req", kprobe, -1)11	if err != nil {12		fmt.Fprintf(os.Stderr, "Failed to attach kprobe__inet_csk_route_req: %s\n", err)13		os.Exit(1)14	}15	table := bcc.NewTable(bpfModule.TableId("csum_inet"), bpfModule)16	channel := make(chan []byte)17	perfMap, err := bcc.InitPerfMap(table, channel, nil)18	if err != nil {19		fmt.Fprintf(os.Stderr, "Failed to init perf map: %s\n", err)20		os.Exit(1)21	}22	perfMap.Start()23	for {24		csum := *(*uint32)(unsafe.Pointer(&data[0]))25		fmt.Printf("inet_csk_route_req checksum: %x\n", csum)26	}27	perfMap.Stop()28}

generateCsumInet

Using AI Code Generation

1import (2func main() {3	data = []byte{0x45, 0x00, 0x00, 0x54, 0x00, 0x00, 0x40, 0x00, 0x40, 0x11, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x01, 0x0a, 0x00, 0x00, 0x02}4	csum = generateCsumInet(data, 0, len(data))5	fmt.Printf("Checksum is: 0x%x\n", csum)6}7func generateCsumInet(data []byte, offset int, length int) uint16 {8	p = unsafe.Pointer(&data[offset])9	for i = 0; i < length/2; i++ {10		val = *(*uint16)(p)11		csum += uint32(val)12		p = unsafe.Pointer(uintptr(p) + 2)13	}14	if length%2 != 0 {15		val = *(*uint16)(p)16		csum += uint32(val)17	}18	csum = (csum >> 16) + (csum & 0xffff)19	csum += (csum >> 16)20	return uint16(^csum)21}

generateCsumInet

Using AI Code Generation

1import (2func main() {3	handle, err := pcap.OpenLive("enp0s3", 1024, true, 30*time.Second)4	if err != nil {5		log.Fatal(err)6	}7	defer handle.Close()

generateCsumInet

Using AI Code Generation

1import (2import "C"3func main() {4	csource = C.csource_create()5	csum = C.csum_create()6	csum_inet = C.csum_inet_create()7	C.generateCsumInet(&csource, &csum, &csum_inet)8	fmt.Println("csum_inet: ", *(*C.uint16_t)(unsafe.Pointer(&csum_inet)))9}

generateCsumInet

Using AI Code Generation

1import (2func main() {3	csrc := NewCsource()4	csum, err := csrc.GenerateCsumInet(unsafe.Pointer(&[4]byte{1, 2, 3, 4}), 4)5	if err != nil {6		fmt.Println("Error: ", err)7	}8	fmt.Printf("Checksum: %x\n", csum)9}10import (11func main() {12	csrc := NewCsource()13	csum, err := csrc.CsumInet(unsafe.Pointer(&[4]byte{1, 2, 3, 4}), 4)14	if err != nil {15		fmt.Println("Error: ", err)16	}17	fmt.Printf("Checksum: %x\n", csum)18}19import (20func main() {21	csrc := NewCsource()22	csum, err := csrc.CsumInet(unsafe.Pointer(&[]byte{1, 2, 3, 4}[0]), 4)23	if err != nil {24		fmt.Println("Error: ", err)25	}26	fmt.Printf("Checksum: %x\n", csum)27}28import (29func main() {

generateCsumInet

Using AI Code Generation

1import (2func main() {3    var csource = new(csource.Csource)4    var checksum, err = csource.GenerateCsumInet("4500003c8e3a40008006000000000000ffffffff")5    if err == nil {6        fmt.Println(checksum)7    }8    if err != nil {9        fmt.Println(err)10    }11}12import (13func main() {

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