Hi,
I'd like to change the ip display of the column to some text with lua.
Start by looking at the sections on Column and Columns in the WS Lua API reference portion of the Developer's Guide. Those are the functions you should use. There are API calls for converting a field that you already added as a IP address to that form, or you can do it in Lua. Both approaches are shown to get a string in the example here.
YMMV when trying to set columns from lua - WSDG: 11.5.3. Columns
Some columns cannot be modified, and no error is raised if attempted. The columns that are known to allow modification are "info" and "protocol".
There is a way to do it, but it's somewhat complicated. The details:
The default source and destination columns, which are not just for IP but for the last set address type in the frame - you can have custom columns for ip.src and ip.dst, which would work differently - at the end of packet processing they always replace what is in the column by a string obtained from whatever address is in the frame, unless it is address type NONE in which case nothing happens.
So the correct way to do it is to set pinfo->src and pinfo->dst, which can be done from Lua. If you are using a built in address type like IPv4 that should be straightforward. There are also some built-in generic string and numeric types. For some situations, the right thing would be to register a new address type in the dissector, but I ...
I tried it in a sample script and could not update src.
Don't have access to dev system at the moment to see why it get passed over.
Code here (epan/wslua/wslua_column.c):
===== Example
pinfo.cols['info'] = 'foo bar'
-- syntactic sugar (equivalent to above)
pinfo.cols.info = 'foo bar'
*/
#define WSLUA_ARG_Columns__newindex_TEXT 3 /* The text for the column. */
Columns cols = checkColumns(L,1);
const struct col_names_t* cn;
const char* colname;
const char* text;
if (!cols) return 0;
...
Asked: 2024-08-22 08:16:55 +0000
Seen: 68 times
Last updated: Aug 22