protocols

package
v0.0.4 Latest Latest
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 Go to latest Published: May 26, 2025 License: MIT Imports: 5 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	BitsPerByte     byte = 8
	BitsPerHalfByte byte = BitsPerByte / 2
)
View Source 
const (
	ICMPHDR_TYPE     = HeaderOffset(byte(0) * BitsPerByte)
	ICMPHDR_CODE     = HeaderOffset(byte(1) * BitsPerByte)
	ICMPHDR_CHECKSUM = HeaderOffset(byte(2) * BitsPerByte)
	ICMPHDR_ID       = HeaderOffset(byte(4) * BitsPerByte)
	ICMPHDR_SEQ      = HeaderOffset(byte(6) * BitsPerByte)
	ICMPHDR_GATEWAY  = HeaderOffset(byte(8) * BitsPerByte)
	ICMPHDR_MTU      = HeaderOffset(byte(14) * BitsPerByte)
)
View Source 
const (
	ICMP6HDR_TYPE     = HeaderOffset(byte(0) * BitsPerByte)
	ICMP6HDR_CODE     = HeaderOffset(byte(1) * BitsPerByte)
	ICMP6HDR_CHECKSUM = HeaderOffset(byte(2) * BitsPerByte)
	ICMP6HDR_PPTR     = HeaderOffset(byte(4) * BitsPerByte)
	ICMP6HDR_MTU      = HeaderOffset(byte(8) * BitsPerByte)
)
View Source 
const (
	UDPHDR_SPORT    = HeaderOffset(byte(0) * BitsPerByte)
	UDPHDR_DPORT    = HeaderOffset(byte(2) * BitsPerByte)
	UDPHDR_LENGTH   = HeaderOffset(byte(4) * BitsPerByte)
	UDPHDR_CHECKSUM = HeaderOffset(byte(6) * BitsPerByte)
)
View Source 
const (
	TCPHDR_SPORT    = HeaderOffset(byte(0) * BitsPerByte)
	TCPHDR_DPORT    = HeaderOffset(byte(2) * BitsPerByte)
	TCPHDR_SEQ      = HeaderOffset(byte(4) * BitsPerByte)
	TCPHDR_ACKSEQ   = HeaderOffset(byte(8) * BitsPerByte)
	TCPHDR_RESERVED = HeaderOffset(byte(12) * BitsPerByte)
	TCPHDR_DOFF     = HeaderOffset(byte(TCPHDR_RESERVED) + BitsPerHalfByte)
	TCPHDR_FLAGS    = HeaderOffset(byte(13) * BitsPerByte)
	TCPHDR_WINDOW   = HeaderOffset(byte(14) * BitsPerByte)
	TCPHDR_CHECKSUM = HeaderOffset(byte(16) * BitsPerByte)
	TCPHDR_URGPTR   = HeaderOffset(byte(18) * BitsPerByte)
)
View Source 
const (
	IPHDR_HDRLENGTH = HeaderOffset(byte(0) * BitsPerHalfByte)
	IPHDR_VERSION   = HeaderOffset(byte(IPHDR_HDRLENGTH) + BitsPerHalfByte)
	IPHDR_ECN       = HeaderOffset(byte(IPHDR_VERSION) + BitsPerHalfByte)
	IPHDR_DSCP      = HeaderOffset(byte(IPHDR_ECN) + BitsPerHalfByte)
	IPHDR_LENGTH    = HeaderOffset(byte(IPHDR_DSCP) + BitsPerHalfByte)
	IPHDR_ID        = HeaderOffset(byte(IPHDR_LENGTH) + 2*BitsPerByte)
	IPHDR_FRAG_OFF  = HeaderOffset(byte(IPHDR_ID) + 2*BitsPerByte)
	IPHDR_TTL       = HeaderOffset(byte(8) * BitsPerByte)
	IPHDR_PROTOCOL  = HeaderOffset(byte(9) * BitsPerByte)
	IPHDR_CHECKSUM  = HeaderOffset(byte(10) * BitsPerByte)
	IPHDR_SADDR     = HeaderOffset(byte(12) * BitsPerByte)
	IPHDR_DADDR     = HeaderOffset(byte(16) * BitsPerByte)
)
View Source 
const (
	IP6HDR_VERSION   = HeaderOffset(byte(0) * BitsPerByte)
	IP6HDR_FLOWLABEL = HeaderOffset(byte(1) * BitsPerByte)
	IP6HDR_LENGTH    = HeaderOffset(byte(4) * BitsPerByte)
	IP6HDR_NEXTHDR   = HeaderOffset(byte(6) * BitsPerByte)
	IP6HDR_HOPLIMIT  = HeaderOffset(byte(7) * BitsPerByte)
	IP6HDR_SADDR     = HeaderOffset(byte(8) * BitsPerByte)
	IP6HDR_DADDR     = HeaderOffset(byte(24) * BitsPerByte)
)

Variables

View Source 
var Protocols = ProtoLayerHolder{
	expr.PayloadBaseTransportHeader: {
		unix.IPPROTO_ICMP: ProtoDesc{
			Name:          "icmp",
			Id:            unix.IPPROTO_ICMP,
			Base:          expr.PayloadBaseTransportHeader,
			CurrentOffset: ICMPHDR_TYPE,
			Offsets: ProtoHdrHolder{
				ICMPHDR_TYPE:     ProtoHdrDesc{Name: "type", Desc: BytesToIcmpType},
				ICMPHDR_CODE:     ProtoHdrDesc{Name: "code", Desc: BytesToIcmpCode},
				ICMPHDR_CHECKSUM: ProtoHdrDesc{Name: "checksum", Desc: bytes.BytesToDecimalString},
				ICMPHDR_ID:       ProtoHdrDesc{Name: "id", Desc: bytes.BytesToDecimalString},
				ICMPHDR_SEQ:      ProtoHdrDesc{Name: "sequence", Desc: bytes.BytesToDecimalString},
				ICMPHDR_GATEWAY:  ProtoHdrDesc{Name: "gateway", Desc: bytes.BytesToDecimalString},
				ICMPHDR_MTU:      ProtoHdrDesc{Name: "mtu", Desc: bytes.BytesToDecimalString},
			},
		},
		unix.IPPROTO_ICMPV6: ProtoDesc{
			Name:          "icmpv6",
			Id:            unix.IPPROTO_ICMPV6,
			Base:          expr.PayloadBaseTransportHeader,
			CurrentOffset: ICMP6HDR_TYPE,
			Offsets: ProtoHdrHolder{
				ICMP6HDR_TYPE:     ProtoHdrDesc{Name: "type", Desc: BytesToIcmp6Type},
				ICMP6HDR_CODE:     ProtoHdrDesc{Name: "code", Desc: BytesToIcmp6Code},
				ICMP6HDR_CHECKSUM: ProtoHdrDesc{Name: "checksum", Desc: bytes.BytesToDecimalString},
				ICMP6HDR_PPTR:     ProtoHdrDesc{Name: "parameter-problem", Desc: bytes.BytesToDecimalString},
				ICMP6HDR_MTU:      ProtoHdrDesc{Name: "mtu", Desc: bytes.BytesToDecimalString},
			},
		},
		unix.IPPROTO_UDP: ProtoDesc{
			Name:          "udp",
			Id:            unix.IPPROTO_UDP,
			Base:          expr.PayloadBaseTransportHeader,
			CurrentOffset: UDPHDR_SPORT,
			Offsets: ProtoHdrHolder{
				UDPHDR_SPORT:    ProtoHdrDesc{Name: "sport", Desc: bytes.BytesToDecimalString},
				UDPHDR_DPORT:    ProtoHdrDesc{Name: "dport", Desc: bytes.BytesToDecimalString},
				UDPHDR_LENGTH:   ProtoHdrDesc{Name: "length", Desc: bytes.BytesToDecimalString},
				UDPHDR_CHECKSUM: ProtoHdrDesc{Name: "checksum", Desc: bytes.BytesToDecimalString},
			},
		},
		unix.IPPROTO_TCP: ProtoDesc{
			Name:          "tcp",
			Id:            unix.IPPROTO_TCP,
			Base:          expr.PayloadBaseTransportHeader,
			CurrentOffset: TCPHDR_SPORT,
			Offsets: ProtoHdrHolder{
				TCPHDR_SPORT:    ProtoHdrDesc{Name: "sport", Desc: bytes.BytesToDecimalString},
				TCPHDR_DPORT:    ProtoHdrDesc{Name: "dport", Desc: bytes.BytesToDecimalString},
				TCPHDR_SEQ:      ProtoHdrDesc{Name: "sequence", Desc: bytes.BytesToDecimalString},
				TCPHDR_ACKSEQ:   ProtoHdrDesc{Name: "ackseq", Desc: bytes.BytesToDecimalString},
				TCPHDR_RESERVED: ProtoHdrDesc{Name: "rederved", Desc: bytes.BytesToDecimalString},
				TCPHDR_DOFF:     ProtoHdrDesc{Name: "doff", Desc: bytes.BytesToDecimalString},
				TCPHDR_FLAGS:    ProtoHdrDesc{Name: "flags", Desc: BytesToTcpFlags},
				TCPHDR_WINDOW:   ProtoHdrDesc{Name: "window", Desc: bytes.BytesToDecimalString},
				TCPHDR_CHECKSUM: ProtoHdrDesc{Name: "checksum", Desc: bytes.BytesToDecimalString},
				TCPHDR_URGPTR:   ProtoHdrDesc{Name: "urgptr", Desc: bytes.BytesToDecimalString},
			},
		},
		unix.IPPROTO_NONE: ProtoDesc{
			Name:          "th",
			Id:            unix.IPPROTO_NONE,
			Base:          expr.PayloadBaseTransportHeader,
			CurrentOffset: THDR_SPORT,
			Offsets: ProtoHdrHolder{
				THDR_SPORT: ProtoHdrDesc{Name: "sport", Desc: bytes.BytesToDecimalString},
				THDR_DPORT: ProtoHdrDesc{Name: "dport", Desc: bytes.BytesToDecimalString},
			},
		},
	},
	expr.PayloadBaseNetworkHeader: {
		unix.IPPROTO_IP: ProtoDesc{
			Name:          "ip",
			Id:            unix.IPPROTO_IP,
			Base:          expr.PayloadBaseNetworkHeader,
			CurrentOffset: IPHDR_HDRLENGTH,
			Offsets: ProtoHdrHolder{
				IPHDR_HDRLENGTH: ProtoHdrDesc{Name: "hdrlength", Desc: bytes.BytesToDecimalString},
				IPHDR_VERSION:   ProtoHdrDesc{Name: "version", Desc: bytes.BytesToIPVer},
				IPHDR_ECN:       ProtoHdrDesc{Name: "ecn", Desc: bytes.BytesToEcn},
				IPHDR_DSCP:      ProtoHdrDesc{Name: "dscp", Desc: bytes.BytesToDscp},
				IPHDR_LENGTH:    ProtoHdrDesc{Name: "length", Desc: bytes.BytesToDecimalString},
				IPHDR_ID:        ProtoHdrDesc{Name: "id", Desc: bytes.BytesToDecimalString},
				IPHDR_FRAG_OFF:  ProtoHdrDesc{Name: "frag-off", Desc: bytes.BytesToHexString},
				IPHDR_TTL:       ProtoHdrDesc{Name: "ttl", Desc: bytes.BytesToDecimalString},
				IPHDR_PROTOCOL:  ProtoHdrDesc{Name: "protocol", Desc: BytesToProtoString},
				IPHDR_CHECKSUM:  ProtoHdrDesc{Name: "checksum", Desc: bytes.BytesToDecimalString},
				IPHDR_SADDR:     ProtoHdrDesc{Name: "saddr", Desc: bytes.BytesToAddrString},
				IPHDR_DADDR:     ProtoHdrDesc{Name: "daddr", Desc: bytes.BytesToAddrString},
			},
		},
		unix.IPPROTO_IPV6: ProtoDesc{
			Name:          "ip6",
			Id:            unix.IPPROTO_IPV6,
			Base:          expr.PayloadBaseNetworkHeader,
			CurrentOffset: IP6HDR_VERSION,
			Offsets: ProtoHdrHolder{
				IP6HDR_VERSION:   ProtoHdrDesc{Name: "version", Desc: bytes.BytesToDecimalString},
				IP6HDR_FLOWLABEL: ProtoHdrDesc{Name: "flowlabel", Desc: bytes.BytesToDecimalString},
				IP6HDR_LENGTH:    ProtoHdrDesc{Name: "length", Desc: bytes.BytesToDecimalString},
				IP6HDR_NEXTHDR:   ProtoHdrDesc{Name: "nexthdr", Desc: bytes.BytesToDecimalString},
				IP6HDR_HOPLIMIT:  ProtoHdrDesc{Name: "hoplimit", Desc: bytes.BytesToDecimalString},
				IP6HDR_SADDR:     ProtoHdrDesc{Name: "saddr", Desc: bytes.BytesToAddrString},
				IP6HDR_DADDR:     ProtoHdrDesc{Name: "daddr", Desc: bytes.BytesToAddrString},
			},
		},
	},
}

Functions

func BytesToIcmp6Code 

func BytesToIcmp6Code(b []byte) string

func BytesToIcmp6Type 

func BytesToIcmp6Type(b []byte) string

func BytesToIcmpCode 

func BytesToIcmpCode(b []byte) string

func BytesToIcmpType 

func BytesToIcmpType(b []byte) string

func BytesToProtoString 

func BytesToProtoString(b []byte) string

func BytesToTcpFlags 

func BytesToTcpFlags(b []byte) string

Types

type HeaderOffset 

type HeaderOffset uint32
const (
	THDR_SPORT HeaderOffset = HeaderOffset(byte(0) * BitsPerByte)
	THDR_DPORT HeaderOffset = HeaderOffset(byte(2) * BitsPerByte)
)

func (HeaderOffset) BytesToBits 

func (nbytes HeaderOffset) BytesToBits() HeaderOffset

func (HeaderOffset) WithBitMask 

func (offset HeaderOffset) WithBitMask(mask uint32) HeaderOffset

type Icmp6Code 

type Icmp6Code int
const (
	ICMPV6_NOROUTE        Icmp6Code = 0
	ICMPV6_ADM_PROHIBITED Icmp6Code = 1
	ICMPV6_ADDR_UNREACH   Icmp6Code = 3
	ICMPV6_PORT_UNREACH   Icmp6Code = 4
	ICMPV6_POLICY_FAIL    Icmp6Code = 5
	ICMPV6_REJECT_ROUTE   Icmp6Code = 6
)

ICMP6_CODE

func (Icmp6Code) String 

func (i Icmp6Code) String() string

type Icmp6Type 

type Icmp6Type int
const (
	ICMP6_DST_UNREACH        Icmp6Type = 1
	ICMP6_PACKET_TOO_BIG     Icmp6Type = 2
	ICMP6_TIME_EXCEEDED      Icmp6Type = 3
	ICMP6_PARAM_PROB         Icmp6Type = 4
	ICMP6_ECHO_REQUEST       Icmp6Type = 128
	ICMP6_ECHO_REPLY         Icmp6Type = 129
	MLD_LISTENER_QUERY       Icmp6Type = 130
	MLD_LISTENER_REPORT      Icmp6Type = 131
	MLD_LISTENER_REDUCTION   Icmp6Type = 132
	ND_NEIGHBOR_SOLICIT      Icmp6Type = 133
	ND_NEIGHBOR_ADVERT       Icmp6Type = 134
	ND_REDIRECT              Icmp6Type = 137
	ICMP6_ROUTER_RENUMBERING Icmp6Type = 138
	IND_NEIGHBOR_SOLICIT     Icmp6Type = 141
	IND_NEIGHBOR_ADVERT      Icmp6Type = 142
	ICMPV6_MLD2_REPORT       Icmp6Type = 143
)

ICMP6_TYPE

func (Icmp6Type) String 

func (i Icmp6Type) String() string

type IcmpCode 

type IcmpCode int
const (
	ICMP_NET_UNREACH  IcmpCode = 0
	ICMP_HOST_UNREACH IcmpCode = 1
	ICMP_PROT_UNREACH IcmpCode = 2
	ICMP_PORT_UNREACH IcmpCode = 3
	ICMP_NET_ANO      IcmpCode = 9
	ICMP_HOST_ANO     IcmpCode = 10
	ICMP_PKT_FILTERED IcmpCode = 13
	ICMP_FRAG_NEEDED  IcmpCode = 4
)

ICMP_CODE

func (IcmpCode) String 

func (i IcmpCode) String() string

type IcmpType 

type IcmpType int
const (
	ICMP_ECHOREPLY      IcmpType = 0
	ICMP_DEST_UNREACH   IcmpType = 3
	ICMP_SOURCE_QUENCH  IcmpType = 4
	ICMP_REDIRECT       IcmpType = 5
	ICMP_ECHO           IcmpType = 8
	ICMP_ROUTERADVERT   IcmpType = 9
	ICMP_ROUTERSOLICIT  IcmpType = 10
	ICMP_TIME_EXCEEDED  IcmpType = 11
	ICMP_PARAMETERPROB  IcmpType = 12
	ICMP_TIMESTAMP      IcmpType = 13
	ICMP_TIMESTAMPREPLY IcmpType = 14
	ICMP_INFO_REQUEST   IcmpType = 15
	ICMP_INFO_REPLY     IcmpType = 16
	ICMP_ADDRESS        IcmpType = 17
	ICMP_ADDRESSREPLY   IcmpType = 18
)

ICMP_TYPE

func (IcmpType) String 

func (i IcmpType) String() string

type ProtoDesc 

type ProtoDesc struct {
	Name          string
	Id            ProtoType
	Base          expr.PayloadBase
	CurrentOffset HeaderOffset
	Offsets       ProtoHdrHolder
}

type ProtoDescPtr 

type ProtoDescPtr *ProtoDesc

type ProtoHdrDesc 

type ProtoHdrDesc struct {
	Name string
	Desc func(b []byte) string
}

type ProtoHdrHolder 

type ProtoHdrHolder map[HeaderOffset]ProtoHdrDesc

type ProtoLayerHolder 

type ProtoLayerHolder map[expr.PayloadBase]ProtoTypeHolder

type ProtoType 

type ProtoType uint8

func (ProtoType) String 

func (p ProtoType) String() string

type ProtoTypeHolder 

type ProtoTypeHolder map[ProtoType]ProtoDesc

type TcpFlagType 

type TcpFlagType int
const (
	TCP_FLAG_FIN TcpFlagType = 1 << iota
	TCP_FLAG_SYN
	TCP_FLAG_RST
	TCP_FLAG_PSH
	TCP_FLAG_ACK
	TCP_FLAG_URG
	TCP_FLAG_ECN
	TCP_FLAG_CWR
)

TCP_FLAG_TYPE

func (TcpFlagType) String 

func (t TcpFlagType) String() string

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