How to use composePseudoCsumIPv4 method of prog Package

Best Syzkaller code snippet using prog.composePseudoCsumIPv4

checksum.go

Source:checksum.go

...84		csummedArg := findCsummedArg(arg, typ, parentsMap)85		protocol := uint8(typ.Protocol)86		var info CsumInfo87		if ipSrcAddr.Size() == 4 {88			info = composePseudoCsumIPv4(csummedArg, ipSrcAddr, ipDstAddr, protocol)89		} else {90			info = composePseudoCsumIPv6(csummedArg, ipSrcAddr, ipDstAddr, protocol)91		}92		csumMap[arg] = info93		csumUses[csummedArg] = struct{}{}94		csumUses[ipSrcAddr] = struct{}{}95		csumUses[ipDstAddr] = struct{}{}96	}97	return csumMap, csumUses98}99func findCsummedArg(arg Arg, typ *CsumType, parentsMap map[Arg]Arg) Arg {100	if typ.Buf == ParentRef {101		csummedArg := parentsMap[arg]102		if csummedArg == nil {103			panic(fmt.Sprintf("%q for %q is not in parents map", ParentRef, typ.Name()))104		}105		return csummedArg106	}107	for parent := parentsMap[arg]; parent != nil; parent = parentsMap[parent] {108		// TODO(dvyukov): support template argument names as in size calculation.109		if typ.Buf == parent.Type().Name() {110			return parent111		}112	}113	panic(fmt.Sprintf("csum field %q references non existent field %q", typ.Name(), typ.Buf))114}115func composePseudoCsumIPv4(tcpPacket, srcAddr, dstAddr Arg, protocol uint8) CsumInfo {116	info := CsumInfo{Kind: CsumInet}117	info.Chunks = append(info.Chunks, CsumChunk{CsumChunkArg, srcAddr, 0, 0})118	info.Chunks = append(info.Chunks, CsumChunk{CsumChunkArg, dstAddr, 0, 0})119	info.Chunks = append(info.Chunks, CsumChunk{CsumChunkConst, nil, uint64(swap16(uint16(protocol))), 2})120	info.Chunks = append(info.Chunks, CsumChunk{CsumChunkConst, nil, uint64(swap16(uint16(tcpPacket.Size()))), 2})121	info.Chunks = append(info.Chunks, CsumChunk{CsumChunkArg, tcpPacket, 0, 0})122	return info123}124func composePseudoCsumIPv6(tcpPacket, srcAddr, dstAddr Arg, protocol uint8) CsumInfo {125	info := CsumInfo{Kind: CsumInet}126	info.Chunks = append(info.Chunks, CsumChunk{CsumChunkArg, srcAddr, 0, 0})127	info.Chunks = append(info.Chunks, CsumChunk{CsumChunkArg, dstAddr, 0, 0})128	info.Chunks = append(info.Chunks, CsumChunk{CsumChunkConst, nil, uint64(swap32(uint32(tcpPacket.Size()))), 4})129	info.Chunks = append(info.Chunks, CsumChunk{CsumChunkConst, nil, uint64(swap32(uint32(protocol))), 4})...

composePseudoCsumIPv4

Using AI Code Generation

1import (2const (3func main() {4	prog, err := ebpf.LoadCollectionSpecFromReader(strings.NewReader(composePseudoCsumIPv4))5	if err != nil {6		log.Fatalf("Failed to load program: %v", err)7	}8	m := &ebpf.MapSpec{9	}10	prog.Maps = append(prog.Maps, m)11	objs, err := ebpf.NewCollectionWithOptions(prog, ebpf.CollectionOptions{12		Programs: ebpf.ProgramOptions{13		},14	})15	if err != nil {16		log.Fatalf("Failed to load objects: %v", err)17	}18	defer objs.Close()19	if !ok {20		log.Fatalf("Failed to find program %q", ProgName)21	}22	if !ok {23		log.Fatalf("Failed to find map %q", MapName)24	}25	rd, err := perf.NewReader(m, os.Getpagesize())26	if err != nil {27		log.Fatalf("Failed to create reader: %v", err)28	}29	defer rd.Close()

composePseudoCsumIPv4

Using AI Code Generation

1import (2func main() {3    module := bcc.NewModuleFromFile("./2.o")4    defer module.Close()5    prog, err := module.Load("prog", 1)6    if err != nil {7        fmt.Printf("Failed to load prog: %s8        os.Exit(1)9    }10    if err := netlink.LinkSetXdpFdByIndex(2, prog); err != nil {11        fmt.Printf("Failed to attach prog to interface: %s12        os.Exit(1)13    }14    ip := net.ParseIP("

composePseudoCsumIPv4

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello, playground")4}5import (6func main() {7	fmt.Println("Hello, playground")8}9import (10func main() {11	fmt.Println("Hello, playground")12}13import (14func main() {15	fmt.Println("Hello, playground")16}17import (18func main() {19	fmt.Println("Hello, playground")20}21import (22func main() {23	fmt.Println("Hello, playground")24}25import (26func main() {27	fmt.Println("Hello, playground")28}29import (30func main() {31	fmt.Println("Hello, playground")32}33import (34func main() {35	fmt.Println("Hello, playground")36}37import (38func main() {39	fmt.Println("Hello, playground")40}41import (42func main() {43	fmt.Println("Hello, playground")44}45import (46func main() {

composePseudoCsumIPv4

Using AI Code Generation

1import (2func main() {3    prog := bcc.NewProgram("composePseudoCsumIPv4", "2.c")4    defer prog.Close()5    fmt.Println(prog.ComposePseudoCsumIPv4(0x01020304, 0x05060708, 0x090a0b0c, 0x0d0e0f10, 0x11121314))6}7import (8func main() {9    prog := bcc.NewProgram("composePseudoCsumIPv6", "2.c")10    defer prog.Close()11    fmt.Println(prog.ComposePseudoCsumIPv6([4]uint32{0x01020304, 0x05060708, 0x090a0b0c, 0x0d0e0f10}, 0x11121314, 0x15161718))12}13import (14func main() {15    prog := bcc.NewProgram("getStackId", "2.c")16    defer prog.Close()17    fmt.Println(prog.GetStackId(0, 0, 0, 0))18}19import (20func main() {21    prog := bcc.NewProgram("getStackId", "2.c")22    defer prog.Close()23    fmt.Println(prog.GetStackId(0, 0, 0, 0))24}

composePseudoCsumIPv4

Using AI Code Generation

1import (2func main() {3	if len(os.Args) != 3 {4		fmt.Printf("Usage: %v <interface> <ip>\n", os.Args[0])5		os.Exit(1)6	}7BPF_HASH(counts, u32, u64);8int count(struct __sk_buff *skb) {9	u32 saddr = 0;10	u32 daddr = 0;11	u16 dport = 0;12	u64 zero = 0, *val;13	struct iphdr *ip = (struct iphdr *)skb_network_header(skb);14	if (ip->protocol == IPPROTO_TCP) {15		struct tcphdr *tcp = (struct tcphdr *)skb_transport_header(skb);16		dport = tcp->dest;17	}18	saddr = ip->saddr;19	daddr = ip->daddr;20	u32 pseudoCsum = bpf_csum_diff(0, 0, &saddr, 4, 0);21	pseudoCsum = bpf_csum_diff(0, 0, &daddr, 4, pseudoCsum);22	pseudoCsum += IPPROTO_TCP;23	pseudoCsum += dport;24	val = counts.lookup_or_init(&pseudoCsum, &zero);25	(*val)++;26	return 0;27}28	bpf := bcc.NewModule(source, []string{})29	defer bpf.Close()30	fn, err := bpf.LoadFunc("count", bcc.XDP)31	if err != nil {32		fmt.Fprintf(os.Stderr, "Failed to load count: %s33		os.Exit(1)34	}35	if err := bpf.AttachXDP(device, fn); err != nil {36		fmt.Fprintf(os.Stderr, "Failed to attach count: %s37		os.Exit(1)38	}39	fmt.Printf("Successfully started40	fmt.Printf("Printing counts per IP pair41	ticker := bcc.GetTicker()42	for running {43		select {

composePseudoCsumIPv4

Using AI Code Generation

1func main() {2    prog := NewProg()3    fmt.Println("Pseudo checksum: ", prog.ComposePseudoCsumIPv4())4}5func main() {6    prog := NewProg()7    fmt.Println("Pseudo checksum: ", prog.ComposePseudoCsumIPv6())8}9func main() {10    prog := NewProg()11    fmt.Println("Pseudo checksum: ", prog.ComposePseudoCsumTCPv4())12}13func main() {14    prog := NewProg()15    fmt.Println("Pseudo checksum: ", prog.ComposePseudoCsumTCPv6())16}17func main() {18    prog := NewProg()19    fmt.Println("Pseudo checksum: ", prog.ComposePseudoCsumUDPv4())20}21func main() {22    prog := NewProg()23    fmt.Println("Pseudo checksum: ", prog.ComposePseudoCsumUDPv6())24}25func main() {26    prog := NewProg()27    fmt.Println("Pseudo checksum: ", prog.ComposePseudoCsumSCTPv4())28}

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