Wireshark · Display Filter Reference: Constrained Application Protocol

Field name	Description	Type	Versions
coap.block	Block	Frame number	3.4.0 to 4.4.2
coap.block.count	Block count	Unsigned integer (32 bits)	3.4.0 to 4.4.2
coap.block.error	Block defragmentation error	Frame number	3.4.0 to 4.4.2
coap.block.multiple_tails	Block has multiple tails	Boolean	3.4.0 to 4.4.2
coap.block.overlap	Block overlap	Boolean	3.4.0 to 4.4.2
coap.block.overlap.conflicts	Block overlapping with conflicting data	Boolean	3.4.0 to 4.4.2
coap.block.reassembled.in	Reassembled in	Frame number	3.4.0 to 4.4.2
coap.block.reassembled.length	Reassembled block length	Unsigned integer (32 bits)	3.4.0 to 4.4.2
coap.block.too_long	Block too long	Boolean	3.4.0 to 4.4.2
coap.block_length	Block Length	Unsigned integer (32 bits)	3.4.0 to 4.4.2
coap.block_payload	Block Payload	Byte sequence	3.4.0 to 4.4.2
coap.blocks	Blocks	Label	3.4.0 to 4.4.2
coap.code	Code	Unsigned integer (8 bits)	1.6.0 to 4.4.2
coap.invalid_option_number	Invalid Option Number	Label	1.12.0 to 4.4.2
coap.invalid_option_range	Invalid Option Range	Label	1.12.0 to 4.4.2
coap.length	Length	Unsigned integer (32 bits)	3.2.0 to 4.4.2
coap.mid	Message ID	Unsigned integer (16 bits)	1.12.0 to 4.4.2
coap.ocount	Opt Count	Unsigned integer (8 bits)	1.10.0 to 1.10.14
coap.opt.accept	Accept	Character string	1.8.0 to 4.4.2
coap.opt.block_mflag	More Flag	Unsigned integer (8 bits)	1.6.0 to 4.4.2
coap.opt.block_number	Block Number	Unsigned integer (32 bits)	1.6.0 to 4.4.2
coap.opt.block_size	Encoded Block Size	Unsigned integer (8 bits)	1.6.0 to 4.4.2
coap.opt.ctype	Content-type	Character string	1.6.0 to 4.4.2
coap.opt.delta	Opt Delta	Unsigned integer (8 bits)	1.6.0 to 4.4.2
coap.opt.delta_ext	Opt Delta extended	Unsigned integer (16 bits)	1.12.0 to 4.4.2
coap.opt.desc	Opt Desc	Character string	1.10.0 to 4.4.2
coap.opt.end_marker	End of options marker	Unsigned integer (8 bits)	1.12.0 to 4.4.2
coap.opt.etag	Etag	Byte sequence	1.6.0 to 4.4.2
coap.opt.hop_limit	Hop Limit	Unsigned integer (8 bits)	3.4.0 to 4.4.2
coap.opt.if_match	If-Match	Byte sequence	1.8.0 to 4.4.2
coap.opt.if_none_match	If-None-Match	Byte sequence	1.8.0 to 1.8.15
coap.opt.jump	Opt Jump	Unsigned integer (8 bits)	1.10.0 to 1.10.14
coap.opt.length	Opt Length	Unsigned integer (8 bits)	1.6.0 to 4.4.2
coap.opt.length_ext	Opt Length extended	Unsigned integer (16 bits)	1.12.0 to 4.4.2
coap.opt.location	Location	Character string	1.6.0 to 1.6.16
coap.opt.location_path	Location-Path	Character string	1.8.0 to 4.4.2
coap.opt.location_query	Location-Query	Character string	1.8.0 to 4.4.2
coap.opt.max_age	Max-age	Unsigned integer (32 bits)	1.6.0 to 4.4.2
coap.opt.name	Opt Name	Character string	1.10.0 to 4.4.2
coap.opt.object_security_expand	Expanded Flag Byte	Boolean	2.6.0 to 3.2.18
coap.opt.object_security_kid	Key ID	Byte sequence	2.6.0 to 4.4.2
coap.opt.object_security_kid_context	Key ID Context	Byte sequence	2.6.0 to 4.4.2
coap.opt.object_security_kid_context_len	Key ID Context Length	Unsigned integer (8 bits)	2.6.0 to 4.4.2
coap.opt.object_security_kid_context_present	Key ID Context Present	Boolean	2.6.0 to 4.4.2
coap.opt.object_security_kid_present	Key ID Present	Boolean	3.0.0 to 4.4.2
coap.opt.object_security_non_compressed	Non-compressed COSE message	Boolean	2.6.0 to 3.2.18
coap.opt.object_security_piv	Partial IV	Byte sequence	2.6.0 to 4.4.2
coap.opt.object_security_piv_len	Partial IV Length	Unsigned integer (8 bits)	2.6.0 to 4.4.2
coap.opt.object_security_reserved	Reserved	Boolean	3.4.0 to 4.4.2
coap.opt.object_security_signature	Signature Present	Boolean	2.6.0 to 3.2.18
coap.opt.observe	Observe	Unsigned integer (32 bits)	2.0.0 to 4.4.2
coap.opt.opt_echo	Echo	Byte sequence	4.2.0 to 4.4.2
coap.opt.opt_no_response	No-Response	Unsigned integer (8 bits)	4.2.0 to 4.4.2
coap.opt.opt_ocf_accept_version	OCF-Accept-Content-Format-Version	Unsigned integer (8 bits)	4.2.0 to 4.4.2
coap.opt.opt_ocf_version	OCF-Content-Format-Version	Unsigned integer (8 bits)	4.2.0 to 4.4.2
coap.opt.opt_request_tag	Request-Tag	Byte sequence	4.2.0 to 4.4.2
coap.opt.payload_desc	Payload Desc	Character string	1.10.0 to 2.2.17
coap.opt.proxy_scheme	Proxy-Scheme	Character string	2.0.0 to 4.4.2
coap.opt.proxy_uri	Proxy-Uri	Character string	1.8.0 to 4.4.2
coap.opt.size1	Size1	Unsigned integer (32 bits)	2.0.0 to 4.4.2
coap.opt.subscr_lifetime	Lifetime	Unsigned integer (32 bits)	1.6.0 to 1.12.13
coap.opt.token	Token	Character string	1.6.0 to 1.10.14
coap.opt.unknown	Unknown	Byte sequence	1.10.0 to 4.4.2
coap.opt.uri_auth	Uri-Authority	Character string	1.6.0 to 1.6.16
coap.opt.uri_host	Uri-Host	Character string	1.8.0 to 4.4.2
coap.opt.uri_path	Uri-Path	Character string	1.6.0 to 4.4.2
coap.opt.uri_path_recon	Uri-Path	Character string	2.4.0 to 4.4.2
coap.opt.uri_port	Uri-Port	Unsigned integer (16 bits)	1.8.0 to 4.4.2
coap.opt.uri_query	Uri-Query	Character string	1.6.0 to 4.4.2
coap.optcount	Option Count	Unsigned integer (8 bits)	1.6.0 to 1.8.15
coap.option_length_bad	Option length bad	Label	1.12.0 to 4.4.2
coap.option_object_security_bad	Invalid Object-Security Option Format	Label	2.6.0 to 3.2.2
coap.option_oscore_bad	Invalid OSCORE Option Format	Label	3.2.3 to 4.4.2
coap.oscore_kid	OSCORE Key ID	Byte sequence	2.6.0 to 4.4.2
coap.oscore_kid_context	OSCORE Key ID Context	Byte sequence	2.6.0 to 4.4.2
coap.oscore_piv	OSCORE Partial IV	Byte sequence	2.6.0 to 4.4.2
coap.payload	Payload	Character string	1.12.0 to 4.4.2
coap.payload_desc	Payload Desc	Character string	2.4.0 to 4.4.2
coap.payload_length	Payload Length	Unsigned integer (32 bits)	2.4.0 to 4.4.2
coap.request_first_in	Retransmission of request in	Frame number	3.2.0 to 4.4.2
coap.response_first_in	Retransmission of response in	Frame number	3.2.0 to 4.4.2
coap.response_in	Response In	Frame number	2.2.0 to 4.4.2
coap.response_time	Response Time	Time offset	2.2.0 to 4.4.2
coap.response_to	Request In	Frame number	2.2.0 to 4.4.2
coap.retransmitted	Retransmitted	Label	3.2.0 to 4.4.2
coap.tid	Transaction ID	Unsigned integer (16 bits)	1.6.0 to 1.10.14
coap.token	Token	Byte sequence	1.12.0 to 4.4.2
coap.token_len	Token Length	Unsigned integer (8 bits)	1.12.0 to 4.4.2
coap.type	Type	Unsigned integer (8 bits)	1.6.0 to 4.4.2
coap.unknown_option_number	Unknown Option Number	Label	3.2.5 to 4.4.2
coap.version	Version	Unsigned integer (8 bits)	1.6.0 to 4.4.2