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Equivalent Wireshark' statistics-conversations in tshark

asked 2022-05-27 14:54:50 +0000

insilicium gravatar image

updated 2022-05-28 11:07:17 +0000

grahamb gravatar image

In Wireshark, after clicking Statistics - Conversations, TCP tab, we obtain the head below:

"Address A","Port A","Address B","Port B","Packets","Bytes","Packets A → B","Bytes A → B","Packets B → A","Bytes B → A","Rel Start","Duration","Bits/s A → B","Bits/s B → A"

We get similar results by tshark using the command line:

tshark -qtu -z conv,tcp -r <file> -Tfields -E header=y -E separator="," -e ip.src -e tcp.srcport -e ip.dst -e tcp.dstport

The filter "ip.src" in the tshark gives the equivalent "Address A" in the Wireshark, "tcp.srcport", "the Port A", and so on.

How can we find the other fields like "Rel Start", "Duration", etc.? The tshark's man page does not present any filter list.

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answered 2022-05-28 15:13:17 +0000

Chuckc gravatar image

updated 2022-05-28 15:13:52 +0000

The data displayed in Statistics->Conversations or the tshark -z conv,.. tables is calculated and stored in the conversation_table.h and printed by tap-iousers.c:

/** Conversation information */
typedef struct _conversation_item_t {
    ct_dissector_info_t *dissector_info; /** conversation information provided by dissector */
    address             src_address;    /** source address */
    address             dst_address;    /** destination address */
    endpoint_type       etype;          /** endpoint_type (e.g. ENDPOINT_TCP) */
    guint32             src_port;       /** source port */
    guint32             dst_port;       /** destination port */
    conv_id_t           conv_id;        /** conversation id */

    guint64             rx_frames;      /** number of received packets */
    guint64             tx_frames;      /** number of transmitted packets */
    guint64             rx_bytes;       /** number of received bytes */
    guint64             tx_bytes;       /** number of transmitted bytes */

    nstime_t            start_time;     /** relative start time for the conversation */
    nstime_t            stop_time;      /** relative stop time for the conversation */
    nstime_t            start_abs_time; /** absolute start time for the conversation */
} conv_item_t;

Some of the items happen to align with Wireshark display fields but it's not a one-to-one match.

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Asked: 2022-05-27 14:54:50 +0000

Seen: 287 times

Last updated: May 28 '22