protos

type DHCP struct {
	Operation    layers.DHCPOp
	HardwareType layers.LinkType
	HardwareLen  uint8
	HardwareOpts uint8
	Xid          uint32
	Secs         uint16
	Flags        uint16
	ClientIP     net.IP
	YourClientIP net.IP
	NextServerIP net.IP
	RelayAgentIP net.IP
	ClientHWAddr net.HardwareAddr
	ServerName   []byte
	File         []byte
	Options      layers.DHCPOptions
}

type DNS struct {
	ID     uint16           `json:"id"`
	QR     bool             `json:"qr"`
	OpCode layers.DNSOpCode `json:"opcode"`

	AA bool  `json:"aa"` // Authoritative answer
	TC bool  `json:"tc"` // Truncated
	RD bool  `json:"rd"` // Recursion desired
	RA bool  `json:"ra"` // Recursion available
	Z  uint8 `json:"z"`  // For future use

	ResponseCode layers.DNSResponseCode `json:"rescode"`
	QDCount      uint16                 `json:"qdc"` // Expected questions
	ANCount      uint16                 `json:"anc"` // Expected answers
	NSCount      uint16                 `json:"nsc"` // Expected authorities
	ARCount      uint16                 `json:"arc"` // Expected additional records

	Questions []DNSQuestion       `json:"questions,omitempty"`
	Answers   []DNSResourceRecord `json:"answers,omitempty"`
}

type DNSQuestion struct {
	Name  string          `json:"name"`
	Type  layers.DNSType  `json:"type"`
	Class layers.DNSClass `json:"class"`
}

type DNSResourceRecord struct {
	Name  string          `json:"name"`
	Type  layers.DNSType  `json:"type"`
	Class layers.DNSClass `json:"class"`
	TTL   uint32          `json:"ttl"`

	IP    net.IP `json:"ip,omitempty"`
	NS    string `json:"ns,omitempty"`
	CNAME string `json:"cname,omitempty"`
}

type IPv4 struct {
	Version    uint8               `json:"version"`
	IHL        uint8               `json:"ihl"`
	TOS        uint8               `json:"tos"`
	Length     uint16              `json:"len"`
	Id         uint16              `json:"id"`
	Flags      layers.IPv4Flag     `json:"flags"`
	FragOffset uint16              `json:"offset"`
	TTL        uint8               `json:"ttl"`
	Protocol   layers.IPProtocol   `json:"proto"`
	Checksum   uint16              `json:"checksum"`
	SrcIP      net.IP              `json:"srcip"`
	DstIP      net.IP              `json:"dstip"`
	Options    []layers.IPv4Option `json:"-"`
	Padding    []byte              `json:"padding,omitempty"`
}

type IPv6 struct {
	Version      uint8                `json:"version"`
	TrafficClass uint8                `json:"tc"`
	FlowLabel    uint32               `json:"flow"`
	Length       uint16               `json:"len"`
	NextHeader   layers.IPProtocol    `json:"proto"`
	HopLimit     uint8                `json:"hoplimit"`
	SrcIP        net.IP               `json:"srcip"`
	DstIP        net.IP               `json:"dstip"`
	HopByHop     *layers.IPv6HopByHop `json:"-"`
}

type RTCP_Packet struct {
	SenderInformation struct {
		Ntp_timestamp_MSW uint32 `json:"ntp_timestamp_sec"`
		Ntp_timestamp_LSW uint32 `json:"ntp_timestamp_usec"`
		Rtp_timestamp     uint32 `json:"rtp_timestamp"`
		Pkt_count         uint32 `json:"packets"`
		Octet_count       uint32 `json:"octets"`
	} `json:"sender_information"`
	Ssrc           uint32               `json:"ssrc"`
	Type           uint8                `json:"type"`
	ReportCount    uint8                `json:"report_count"`
	ReportBlocks   []RTCP_report_block  `json:"report_blocks"`
	ReportBlocksXr RTCP_report_block_xr `json:"report_blocks_xr"`
	Sdes_ssrc      uint32               `json:"sdes_ssrc"`
}

type RTCP_header struct {
	Version     uint8  `json:"version"`      // 2 bit
	Padding     uint8  `json:"padding"`      // 1 bit
	ReportCount uint8  `json:"report_count"` // 5 bit
	RTCPType    uint8  `json:"type"`
	Length      uint16 `json:"length"`
}

type RTCP_report_block struct {
	SourceSsrc      uint32 `json:"source_ssrc"`
	Fraction_lost   uint8  `json:"fraction_lost"`
	Cumulative_lost uint32 `json:"packets_lost"` // 24 bit
	Highest_seq_no  uint32 `json:"highest_seq_no"`
	Jitter          uint32 `json:"ia_jitter"`
	LastSR          uint32 `json:"lsr"`
	Delay_last_SR   uint32 `json:"dlsr"`
}

type RTCP_report_block_xr struct {
	Type             uint8  `json:"type"`
	ID               uint32 `json:"id"`
	Fraction_lost    uint8  `json:"fraction_lost"`
	Fraction_discard uint8  `json:"fraction_discard"`
	Burst_density    uint8  `json:"burst_density"`
	Gap_density      uint8  `json:"gap_density"`
	Burst_duration   uint16 `json:"burst_duration"`
	Gap_duration     uint16 `json:"gap_duration"`
	Round_trip_delay uint16 `json:"round_trip_delay"`
	End_system_delay uint16 `json:"end_system_delay"`
}

type TCP struct {
	SrcPort layers.TCPPort `json:"srcport"`
	DstPort layers.TCPPort `json:"dstport"`
	Payload []byte         `json:"payload,omitempty"`
}

type UDP struct {
	SrcPort layers.UDPPort `json:"srcport"`
	DstPort layers.UDPPort `json:"dstport"`
	Payload []byte         `json:"payload,omitempty"`
}

type WSHeader struct {
	Fin    bool
	Rsv    byte
	OpCode WSOpCode
	Masked bool
	Mask   [4]byte
	Length int64
	Offset int
}

type WSOpCode byte