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Constants ¶
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const ( TCPFlagFIN = 1 // 0000 0001 TCPFlagSYN = 2 // 0000 0010 TCPFlagRST = 4 // 0000 0100 TCPFlagPSH = 8 // 0000 1000 TCPFlagACK = 16 // 0001 0000 TCPFlagURG = 32 // 0010 0000 )
TCP flags
Variables ¶
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var ( ErrInvalidIdentifier = errors.New("invalid tcp packet identifier") ErrCreateSocket = errors.New("failed to create socket") ErrApplyFilter = errors.New("failed to apply bpf filter") ErrMessageTooShort = errors.New("input message is too short") )
Possible return errors
Functions ¶
This section is empty.
Types ¶
type TCPPacket ¶
type TCPPacket struct {
// Header fields
Source uint16
Destination uint16
SeqNum uint32
AckNum uint32
DataOffset uint8 // 4 bits
Reserved uint8 // 3 bits
ECN uint8 // 3 bits
Ctrl uint8 // 6 bits
Window uint16
Checksum uint16 // Kernel will set this if it's 0
Urgent uint16
}
TCPPacket describes a tcp packet
type TCPPacketIdentifier ¶
TCPPacketIdentifier provides instructions for filtering the packets
type TCPPacketSniffer ¶
type TCPPacketSniffer interface {
Capture(identifier *TCPPacketIdentifier) (<-chan *TCPPacket, error)
Stop()
}
TCPPacketSniffer supports capturing tcp packets following designated pattern
func NewTCPPacketSniffer ¶
func NewTCPPacketSniffer() TCPPacketSniffer
NewTCPPacketSniffer returns a new TCP packet sniffer
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