[cifs-protocol] [EXTERNAL] MS-SMB2: Create replay and Persistent Handle - TrackingID#2506160040006768

[Obaid Farooqi]

Hi Ralph:
Please find attached to this email a zip file of script t.cmd. Copy the t.cmd to Windows server and collect some traces for me

1. open cmd with admin permissions (Run as administrator)
2. start network trace
3. execute the following command
	>t.cmd srvon
4. reproduce the scenario (I would like all three scenarios)
5. One done reproducing, execute
	>t.cmd srvoff
6. stop and save network capture
7. zip all t.cmd outputs and networks captures and upload to the following link

File Transfer - Case 2506160040006768
https://support.microsoft.com/files?workspace=eyJhbGciOiJSUzI1NiIsImtpZCI6IjUwNjQwRTE0NEREODg5MzE5NzYzRTBFNjM5RjMzNjdFQUNDNzlBRDAiLCJ0eXAiOiJKV1QifQ.eyJ3c2lkIjoiODVjMDU5OGItZWIxMy00MGM1LWExNDEtNTI3NWQyOWQ4ZTJkIiwic3IiOiIyNTA2MTYwMDQwMDA2NzY4Iiwic3YiOiJ2MSIsInJzIjoiRXh0ZXJuYWwiLCJ3dGlkIjoiNjRjOThkOTktMTEzNC00NGFmLTg1ZGEtYWQ3YzI2NWNhODk1IiwiYXBwaWQiOiI0ZTc2ODkxZC04NDUwLTRlNWUtYmUzOC1lYTNiZDZlZjIxZTUiLCJuYmYiOjE3NTAxNDAwMjgsImV4cCI6MTc1NzkxNjAyOCwiaWF0IjoxNzUwMTQwMDI4LCJpc3MiOiJodHRwczovL2FwaS5kdG1uZWJ1bGEubWljcm9zb2Z0LmNvbSIsImF1ZCI6Imh0dHA6Ly9zbWMifQ.MVmO6CTCVg3jhpSxz-X2Krdr8qHbBQtBDRwAxXhTjtk0h99gS17eDoWocvh4nolgb27_KuDgYetiIyWUA5ClNdH1KaKjc053qITig8bsEgOgFIYK6hbyhSXZD1TXgufgCpCfBsGcIIM96Yo2VOWkSyMGEKle92rXIiOEwsXHFuMqXeUB-C0-67iaIZoACvH3rRL3OcGWMAgAc86naBRh_RsuzRs13xjZhQ29H6Bw8G5d1p6jJkXjtO9tWA7leCEGFGittjGMWpIcUK9gk2RFWoJknlCDyudDWv_89ze-HtApJSHUypoGjURmDVPKkcgwtt5Bf7WaGgH4upTbGmtH8g&wid=85c0598b-eb13-40c5-a141-5275d29d8e2d 

Regards,
Obaid Farooqi
Sr. Escalation Engineer | Microsoft

-----Original Message-----
From: Ralph Boehme <slow at samba.org> 
Sent: Monday, June 16, 2025 1:21 PM
To: Obaid Farooqi <obaidf at microsoft.com>
Cc: cifs-protocol at lists.samba.org
Subject: Re: [EXTERNAL] MS-SMB2: Create replay and Persistent Handle - TrackingID#2506160040006768

On 6/16/25 7:52 PM, Ralph Boehme wrote:
>> 2. What are you trying to accomplish here?
> 
> I'm implementing Persistent Handles in Samba and I'm fixing Samba's 
> incomplete Replay behaviour. Hence I'm taking a close look at spec in 
> order to implement things correctly. Currently I can't make sense of 
> the spec as a Windows server behaves differently.

iow I'm trying to understand how precisely the replay cache is managed, particularly when opens are "removed" from the cache (Open.ReplayEligible set to FALSE in MS-SMB2 parlance).

Thanks!
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