checker

func ReceiveIPPacketInfo ¶

func ReceiveIPPacketInfo(want tcpip.IPPacketInfo) ControlMessagesChecker

ReceiveIPPacketInfo creates a checker that checks the PacketInfo field in ControlMessages.

func ReceiveIPv6PacketInfo ¶

func ReceiveIPv6PacketInfo(want tcpip.IPv6PacketInfo) ControlMessagesChecker

ReceiveIPv6PacketInfo creates a checker that checks the IPv6PacketInfo field in ControlMessages.

func ReceiveOriginalDstAddr ¶

func ReceiveOriginalDstAddr(want tcpip.FullAddress) ControlMessagesChecker

ReceiveOriginalDstAddr creates a checker that checks the OriginalDstAddress field in ControlMessages.

func ReceiveTClass ¶

func ReceiveTClass(want uint32) ControlMessagesChecker

ReceiveTClass creates a checker that checks the TCLASS field in ControlMessages.

func ReceiveTOS ¶

func ReceiveTOS(want uint8) ControlMessagesChecker

ReceiveTOS creates a checker that checks the TOS field in ControlMessages.

func IPv6HopByHopExtensionHeader ¶

func IPv6HopByHopExtensionHeader(checkers ...IPv6ExtHdrOptionChecker) IPv6ExtHdrChecker

IPv6HopByHopExtensionHeader checks the extension header is a Hop by Hop extension header and validates the containing options with checkers.

checkers must exhaustively contain all the expected options.

func IPv6RouterAlert ¶

func IPv6RouterAlert(want header.IPv6RouterAlertValue) IPv6ExtHdrOptionChecker

IPv6RouterAlert validates that an extension header option is the RouterAlert option and matches on its value.

func IPv6UnknownOption ¶

func IPv6UnknownOption() IPv6ExtHdrOptionChecker

IPv6UnknownOption validates that an extension header option is the unknown header option.

func DstAddr ¶

func DstAddr(addr tcpip.Address) NetworkChecker

DstAddr creates a checker that checks the destination address.

func FragmentFlags ¶

func FragmentFlags(flags uint8) NetworkChecker

FragmentFlags creates a checker that checks the fragment flags field.

func FragmentOffset ¶

func FragmentOffset(offset uint16) NetworkChecker

FragmentOffset creates a checker that checks the FragmentOffset field.

func ICMPv4 ¶

func ICMPv4(checkers ...TransportChecker) NetworkChecker

ICMPv4 creates a checker that checks that the transport protocol is ICMPv4 and potentially additional ICMPv4 header fields.

func ICMPv6 ¶

func ICMPv6(checkers ...TransportChecker) NetworkChecker

ICMPv6 creates a checker that checks that the transport protocol is ICMPv6 and potentially additional ICMPv6 header fields.

ICMPv6 will validate the checksum field before calling checkers.

func IGMP ¶

func IGMP(checkers ...TransportChecker) NetworkChecker

IGMP checks the validity and properties of the given IGMP packet. It is expected to be used in conjunction with other IGMP transport checkers for specific properties.

func IPFullLength ¶

func IPFullLength(packetLength uint16) NetworkChecker

IPFullLength creates a checker for the full IP packet length. The expected size is checked against both the Total Length in the header and the number of bytes received.

func IPPayload ¶

func IPPayload(payload []byte) NetworkChecker

IPPayload creates a checker that checks the payload.

func IPv4HeaderLength ¶

func IPv4HeaderLength(headerLength int) NetworkChecker

IPv4HeaderLength creates a checker that checks the IPv4 Header length.

func IPv4Options ¶

func IPv4Options(want header.IPv4Options) NetworkChecker

IPv4Options returns a checker that checks the options in an IPv4 packet.

func IPv4RouterAlert ¶

func IPv4RouterAlert() NetworkChecker

IPv4RouterAlert returns a checker that checks that the RouterAlert option is set in an IPv4 packet.

func IPv6ExtHdr ¶

func IPv6ExtHdr(headers ...IPv6ExtHdrChecker) NetworkChecker

IPv6ExtHdr checks for the presence of extension headers.

All the extension headers in headers will be checked exhaustively in the order provided.

func IPv6Fragment ¶

func IPv6Fragment(checkers ...NetworkChecker) NetworkChecker

IPv6Fragment creates a checker that validates an IPv6 fragment.

func MLD ¶

func MLD(msgType header.ICMPv6Type, minSize int, checkers ...TransportChecker) NetworkChecker

MLD creates a checker that checks that the packet contains a valid MLD message for type of mldType, with potentially additional checks specified by checkers.

Checkers may assume that a valid ICMPv6 is passed to it containing a valid MLD message as far as the size of the message (minSize) is concerned. The values within the message are up to checkers to validate.

func NDP ¶

func NDP(msgType header.ICMPv6Type, minSize int, checkers ...TransportChecker) NetworkChecker

NDP creates a checker that checks that the packet contains a valid NDP message for type of ty, with potentially additional checks specified by checkers.

Checkers may assume that a valid ICMPv6 is passed to it containing a valid NDP message as far as the size of the message (minSize) is concerned. The values within the message are up to checkers to validate.

func NDPNA ¶

func NDPNA(checkers ...TransportChecker) NetworkChecker

NDPNA creates a checker that checks that the packet contains a valid NDP Neighbor Advertisement message (as per the raw wire format), with potentially additional checks specified by checkers.

Checkers may assume that a valid ICMPv6 is passed to it containing a valid NDPNA message as far as the size of the message is concerned. The values within the message are up to checkers to validate.

func NDPNS ¶

func NDPNS(checkers ...TransportChecker) NetworkChecker

NDPNS creates a checker that checks that the packet contains a valid NDP Neighbor Solicitation message (as per the raw wire format), with potentially additional checks specified by checkers.

Checkers may assume that a valid ICMPv6 is passed to it containing a valid NDPNS message as far as the size of the message is concerned. The values within the message are up to checkers to validate.

func NDPRS ¶

func NDPRS(checkers ...TransportChecker) NetworkChecker

NDPRS creates a checker that checks that the packet contains a valid NDP Router Solicitation message (as per the raw wire format).

Checkers may assume that a valid ICMPv6 is passed to it containing a valid NDPRS as far as the size of the message is concerned. The values within the message are up to checkers to validate.

func PayloadLen ¶

func PayloadLen(payloadLength int) NetworkChecker

PayloadLen creates a checker that checks the payload length.

func Raw ¶

func Raw(want []byte) NetworkChecker

Raw creates a checker that checks the bytes of payload. The checker always checks the payload of the last network header. For instance, in case of IPv6 fragments, the payload that will be checked is the one containing the actual data that the packet is carrying, without the bytes added by the IPv6 fragmentation.

func SrcAddr ¶

func SrcAddr(addr tcpip.Address) NetworkChecker

SrcAddr creates a checker that checks the source address.

func TCP ¶

func TCP(checkers ...TransportChecker) NetworkChecker

TCP creates a checker that checks that the transport protocol is TCP and potentially additional transport header fields.

func TOS ¶

func TOS(tos uint8, label uint32) NetworkChecker

TOS creates a checker that checks the TOS field.

func TTL ¶

func TTL(ttl uint8) NetworkChecker

TTL creates a checker that checks the TTL (ipv4) or HopLimit (ipv6).

func UDP ¶

func UDP(checkers ...TransportChecker) NetworkChecker

UDP creates a checker that checks that the transport protocol is UDP and potentially additional transport header fields.

func DstPort ¶

func DstPort(port uint16) TransportChecker

DstPort creates a checker that checks the destination port.

func ICMPv4Checksum ¶

func ICMPv4Checksum() TransportChecker

ICMPv4Checksum creates a checker that checks the ICMPv4 Checksum. This assumes that the payload exactly makes up the rest of the slice.

func ICMPv4Code ¶

func ICMPv4Code(want header.ICMPv4Code) TransportChecker

ICMPv4Code creates a checker that checks the ICMPv4 Code field.

func ICMPv4Ident ¶

func ICMPv4Ident(want uint16) TransportChecker

ICMPv4Ident creates a checker that checks the ICMPv4 echo Ident.

func ICMPv4Payload ¶

func ICMPv4Payload(want []byte) TransportChecker

ICMPv4Payload creates a checker that checks the payload in an ICMPv4 packet.

func ICMPv4Pointer ¶

func ICMPv4Pointer(want uint8) TransportChecker

ICMPv4Pointer creates a checker that checks the ICMPv4 Param Problem pointer.

func ICMPv4Seq ¶

func ICMPv4Seq(want uint16) TransportChecker

ICMPv4Seq creates a checker that checks the ICMPv4 echo Sequence.

func ICMPv4Type ¶

func ICMPv4Type(want header.ICMPv4Type) TransportChecker

ICMPv4Type creates a checker that checks the ICMPv4 Type field.

func ICMPv6Code ¶

func ICMPv6Code(want header.ICMPv6Code) TransportChecker

ICMPv6Code creates a checker that checks the ICMPv6 Code field.

func ICMPv6Payload ¶

func ICMPv6Payload(want []byte) TransportChecker

ICMPv6Payload creates a checker that checks the payload in an ICMPv6 packet.

func ICMPv6Type ¶

func ICMPv6Type(want header.ICMPv6Type) TransportChecker

ICMPv6Type creates a checker that checks the ICMPv6 Type field.

func ICMPv6TypeSpecific ¶

func ICMPv6TypeSpecific(want uint32) TransportChecker

ICMPv6TypeSpecific creates a checker that checks the ICMPv6 TypeSpecific field.

func IGMPGroupAddress ¶

func IGMPGroupAddress(want tcpip.Address) TransportChecker

IGMPGroupAddress creates a checker that checks the IGMP Group Address field.

func IGMPMaxRespTime ¶

func IGMPMaxRespTime(want time.Duration) TransportChecker

IGMPMaxRespTime creates a checker that checks the IGMP Max Resp Time field.

func IGMPType ¶

func IGMPType(want header.IGMPType) TransportChecker

IGMPType creates a checker that checks the IGMP Type field.

func MLDMaxRespDelay ¶

func MLDMaxRespDelay(want time.Duration) TransportChecker

MLDMaxRespDelay creates a checker that checks the Maximum Response Delay field of a MLD message.

The returned TransportChecker assumes that a valid ICMPv6 is passed to it containing a valid MLD message as far as the size is concerned.

func MLDMulticastAddress ¶

func MLDMulticastAddress(want tcpip.Address) TransportChecker

MLDMulticastAddress creates a checker that checks the Multicast Address field of a MLD message.

The returned TransportChecker assumes that a valid ICMPv6 is passed to it containing a valid MLD message as far as the size is concerned.

func NDPNAOptions ¶

func NDPNAOptions(opts []header.NDPOption) TransportChecker

NDPNAOptions creates a checker that checks that the packet contains the provided NDP options within an NDP Neighbor Solicitation message.

The returned TransportChecker assumes that a valid ICMPv6 is passed to it containing a valid NDPNA message as far as the size is concerned.

func NDPNASolicitedFlag ¶

func NDPNASolicitedFlag(want bool) TransportChecker

NDPNASolicitedFlag creates a checker that checks the Solicited field of a header.NDPNeighborAdvert.

The returned TransportChecker assumes that a valid ICMPv6 is passed to it containing a valid NDPNA message as far as the size is concerned.

func NDPNATargetAddress ¶

func NDPNATargetAddress(want tcpip.Address) TransportChecker

NDPNATargetAddress creates a checker that checks the Target Address field of a header.NDPNeighborAdvert.

The returned TransportChecker assumes that a valid ICMPv6 is passed to it containing a valid NDPNA message as far as the size is concerned.

func NDPNSOptions ¶

func NDPNSOptions(opts []header.NDPOption) TransportChecker

NDPNSOptions creates a checker that checks that the packet contains the provided NDP options within an NDP Neighbor Solicitation message.

The returned TransportChecker assumes that a valid ICMPv6 is passed to it containing a valid NDPNS message as far as the size is concerned.

func NDPNSTargetAddress ¶

func NDPNSTargetAddress(want tcpip.Address) TransportChecker

NDPNSTargetAddress creates a checker that checks the Target Address field of a header.NDPNeighborSolicit.

The returned TransportChecker assumes that a valid ICMPv6 is passed to it containing a valid NDPNS message as far as the size is concerned.

func NDPRSOptions ¶

func NDPRSOptions(opts []header.NDPOption) TransportChecker

NDPRSOptions creates a checker that checks that the packet contains the provided NDP options within an NDP Router Solicitation message.

The returned TransportChecker assumes that a valid ICMPv6 is passed to it containing a valid NDPRS message as far as the size is concerned.

func NoChecksum ¶

func NoChecksum(noChecksum bool) TransportChecker

NoChecksum creates a checker that checks if the checksum is zero.

func Payload ¶

func Payload(want []byte) TransportChecker

Payload creates a checker that checks the payload.

func SrcPort ¶

func SrcPort(port uint16) TransportChecker

SrcPort creates a checker that checks the source port.

func TCPAckNum ¶

func TCPAckNum(seq uint32) TransportChecker

TCPAckNum creates a checker that checks the ack number.

func TCPFlags ¶

func TCPFlags(flags header.TCPFlags) TransportChecker

TCPFlags creates a checker that checks the tcp flags.

func TCPFlagsMatch ¶

func TCPFlagsMatch(flags, mask header.TCPFlags) TransportChecker

TCPFlagsMatch creates a checker that checks that the tcp flags, masked by the given mask, match the supplied flags.

func TCPSACKBlockChecker ¶

func TCPSACKBlockChecker(sackBlocks []header.SACKBlock) TransportChecker

TCPSACKBlockChecker creates a checker that verifies that the segment does contain the specified SACK blocks in the TCP options.

func TCPSeqNum ¶

func TCPSeqNum(seq uint32) TransportChecker

TCPSeqNum creates a checker that checks the sequence number.

func TCPSynOptions ¶

func TCPSynOptions(wantOpts header.TCPSynOptions) TransportChecker

TCPSynOptions creates a checker that checks the presence of TCP options in SYN segments.

If wndscale is negative, the window scale option must not be present.

func TCPTimestampChecker ¶

func TCPTimestampChecker(wantTS bool, wantTSVal uint32, wantTSEcr uint32) TransportChecker

TCPTimestampChecker creates a checker that validates that a TCP segment has a TCP Timestamp option if wantTS is true, it also compares the wantTSVal and wantTSEcr values with those in the TCP segment (if present).

If wantTSVal or wantTSEcr is zero then the corresponding comparison is skipped.

func TCPWindow ¶

func TCPWindow(window uint16) TransportChecker

TCPWindow creates a checker that checks the tcp window.

func TCPWindowGreaterThanEq ¶

func TCPWindowGreaterThanEq(window uint16) TransportChecker

TCPWindowGreaterThanEq creates a checker that checks that the TCP window is greater than or equal to the provided value.

func TCPWindowLessThanEq ¶

func TCPWindowLessThanEq(window uint16) TransportChecker

TCPWindowLessThanEq creates a checker that checks that the tcp window is less than or equal to the provided value.