View Raw Network Packets

The actual network packets received over the various interfaces opened by YAAC can be seen in the Raw Network Packets window. The window displays the date and time when each message was received, the transmitting radio station's callsign, the intended destination and any stations and aliases the packet was relayed through, and the actual content of the message.

The data can be sorted in any order by clicking on the column heading you wish to sort by.

The message contents can be displayed in three formats:

• Raw ASCII or UTF-8 text (some characters may appear as blocks or other non-standard symbols because they are non-printable control characters)
• Hexadecimal representation of each byte of the message
• an ASCII protocol decoding of the message (particularly useful for binary-encoded messages such as compressed and Mic-E format APRS positions, or OpenTRAC messages).

The text may appear in different colors than the normal black text on white background (or vice versa if you have YAAC in the night display mode). The other non-standard color combinations are:

• magenta (pinkish) text on white background indicates a packet with some sort of error, either from erroneous manual entry (or software error), or because somebody's TNC was configured to pass through AX.25 packets with invalid checksums (which probably means the packet was garbled to cause the checksum failure).
• white text on a red background indicates a packet reporting EMERGENCY status (to make it easier to find this critically important packet).
• dark green text on white indicating an APRS text message with a successful digital cryptographic signature.
• gray (not black) text on white indicating an old packet more than 80 minutes out of date.