Hi,
I'm writing a dissector for a new block type. I register a block read function
for my new block type, and when Wireshark detects one of these blocks, my block
read function is called with the following parameters:
gboolean tdb_read_block(FILE_T fh, guint32 block_data_len, gboolean c,
wtapng_block_t *wtapng_block, int *err, gchar **err_info)
This function then reads the block content like this:
/* read block content */
if (!wtap_read_bytes(fh, wtapng_block->frame_buffer->data, block_data_len,
err, err_info)) {
wmem_strdup_printf(wmem_file_scope(), "tdb_read_block: failed to read
TDB");
return FALSE;
}
Later I need to parse the serialised data in wtapng_block->frame_buffer->data.
I have been writing my own accessors but I realised I am just duplicating
existing TVB accessors. I've looked through README.dissector which describes
in detail how to use the TVB accessors, but not about creating a TVB. There is
a section on TVBUFF_SUBSET but that doesn't seem relevant.
How do I get the block data into a TVB, preferably without having to copy it?
Thanks and regards...Paul
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