PayloadPayload
When
Listen mode
is enabled, the transmitter will await an external TCP
connection before the actual traffic frames are sent. This makes it possible to
pass a firewall/nat router from the other side (Remark: you must have
something establishing the TCP connection from the inner side e.g. Network
Master). In this mode the peers MAC, IP, and Port are taken from the incoming
TCP connection.
Src PortSrc Port
Source port
identifies the sending port.
Dst PortDst Port
Destination port
identifies the receiving port.
Seq numberSeq number
If the SYNSYN flag is present, this is the initial sequence number and the first data
byte is the sequence number plus 1.
If the SYNSYN flag is not present, then the first data byte is the sequence number.
The Auto incrementAuto increment check box may be selected in order for the Sequence
number to follow the number of data bytes sent (Remark: the first data byte will
be number zero in this mode, and not the number entered into the Seq numberSeq number
field).
Ack numberAck number
If the ACKACK flag is set then the value of this field is the sequence number that the
sender of the acknowledgment expects next.
Data offsetData offset
Data offset
specifies the size of the TCP header in 32-bit words. This is set
automatically.
ReservedReserved
Reserved for future use and should be set to zero.
FlagsFlags
Contains 8 bit flags (control bits). The flags may be programmed individually,
however when
Automatic TCP connect
is enabled, most of the flags are
controlled by the TCP state engine.
WindowWindow
Specifies the size of the
sliding window
(i.e. the maximum receiver buffer). The
window
defines the number of bytes that may be sent before waiting for an
acknowledgement from the receiver.
ChecksumChecksum
The 16-bit checksum field is used for error-checking of the header and data.
Urgent pointerUrgent pointer
If the URGURG flag is set then this 16-bit field is an offset from the sequence
number indicating the last urgent data byte.
The
Payload
layer allows you to set the pattern of the Payload of the
transmitted frames.
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