_fragment_head Struct Reference

Represents the head of a fragment reassembly chain, tracking overall reassembly state across all contributing fragments. More...

#include <reassemble.h>

Public Attributes
struct _fragment_item *	next
struct _fragment_item *	first_gap
unsigned	ref_count
uint32_t	contiguous_len
uint32_t	frame
uint32_t	len
uint32_t	fragment_nr_offset
uint32_t	datalen
uint32_t	reassembled_in
uint8_t	reas_in_layer_num
uint32_t	flags
tvbuff_t *	tvb_data
const char *	error

Detailed Description

Represents the head of a fragment reassembly chain, tracking overall reassembly state across all contributing fragments.

Member Data Documentation

contiguous_len

uint32_t _fragment_head::contiguous_len

Number of contiguous bytes received from offset 0 up to the first gap.

datalen

uint32_t _fragment_head::datalen

For FD_BLOCKSEQUENCE: index of the last block (total segments + 1); otherwise the total byte length of the full datagram. Valid only in the first fragment_item when FD_DATALEN is set.

error

const char* _fragment_head::error

NULL if reassembly completed without error; otherwise a string describing the reassembly error that occurred.

first_gap

struct _fragment_item* _fragment_head::first_gap

Pointer to the last fragment before the first gap in the sequence; NULL if no fragment starting at offset 0 has been received.

flags

uint32_t _fragment_head::flags

Bitmask of FD_* flags describing the overall reassembly state.

fragment_nr_offset

uint32_t _fragment_head::fragment_nr_offset

Offset applied to fragment sequence numbers to normalize the first fragment's number to zero when it does not start at 0.

frame

uint32_t _fragment_head::frame

Maximum frame number among all fragments added to this reassembly.

len

uint32_t _fragment_head::len

Total byte length of the fully reassembled datagram; valid only when both FD_BLOCKSEQUENCE and FD_DEFRAGMENTED flags are set.

next

struct _fragment_item* _fragment_head::next

Pointer to the first fragment_item in the reassembly chain.

reas_in_layer_num

uint8_t _fragment_head::reas_in_layer_num

Dissection layer depth at which reassembly completed within the reassembled_in frame; used by protocols such as SCTP where multiple data chunks may appear in one frame.

reassembled_in

uint32_t _fragment_head::reassembled_in

Frame number in which this PDU was fully reassembled; valid only when FD_DEFRAGMENTED is set.

ref_count

unsigned _fragment_head::ref_count

Reference count of this head entry in the reassembled_table.

tvb_data

tvbuff_t* _fragment_head::tvb_data

Tvbuff containing the reassembled payload once reassembly is complete.

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The documentation for this struct was generated from the following file:

• /builds/wireshark/wireshark/epan/reassemble.h