Hi Aurélien, Le lun. 24 févr. 2020 à 15:40, Aurélien Aptel <aap...@suse.com> a écrit :
> Hi, > > I'm working on the SMB2 dissector (packet-smb2.c) and I'd like to have > better support for multichannel where an authenticated session is shared > across TCP sessions. > > So at the moment, we store a hashtable in the conversation. That table > maps SessionId => Session Data > > When a new channel is opened for that session it will share the same ID > but since it's a different TCP connection, it will be in a different > conversation so we won't be able to lookup the existing Session Data. > > The solution would be to make the SessionID=>SessionData hashtable > global per-capture instead of per-conversation. > > How is this usually done in a Wireshark dissector? > > I was thinking of having a global static hashtable in the dissector but > then I would need to reset it when the capture is opened/closed... > You can have a look at the dissectors using wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), ...) which defines a hash table that is automatically reset each time you open a new file (or reload the current one). Best regards, Pascal.
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