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PPSSPP Networking Info Thread
02-03-2021, 02:06 AM (This post was last modified: 02-03-2021 02:10 AM by AdamN.)
Post: #211
RE: PPSSPP Ad-hoc general info thread
(02-02-2021 07:51 PM)Zinx777 Wrote:  Interesting thing I found AdamN that might help figure some issues with VPNs.
As you can see in this picture : https://media.discordapp.net/attachments...height=609
You see there is an MTU of 2800 applied to the VPN configuration.
What is the recommended MTU for a VPN in your opinion? If it could be modified.
Apparently the recommended MTU for playing over Xlink Kai on real PSPs is 2272 but I dont know if its similar to what PPSSPP needs.
I don't know what is the default MTU for other VPNs but I think its in the range of 1400-1500.
Maybe you can add an option on PPSSPP that modifies the MTU ? perhaps it could help some cases.

I don't think it's wise to change the MTU because MTU affects the whole system (more accurately affects an interface) so i won't affect just one program but any program that use the interface where the MTU is being changed, since VPN usually have it's own network interface (virtual network interface) the MTU settings on VPN probably only affects that virtual interface.

There is something similar to MTU and can be changed on per-socket basis, which is called MSS and it's the one i'm using for PPSSPP, and PSP seems to use 1444 for MSS so i'm using the same value for PPSSPP.
Code:
/* PDP Maximum Fragment Size */
#define PSP_ADHOC_PDP_MFS        1444

/* PDP Maximum Transfer Unit */
#define PSP_ADHOC_PDP_MTU        65523

/* PTP Maximum Segment Size */
#define PSP_ADHOC_PTP_MSS        1444
But according to this https://stackoverflow.com/questions/4134...th-winsock changing MSS doesn't works on Windows

My Modified PPSSPP :
==============
Win32&64: https://www.dropbox.com/s/2t3mtdhb0f045cn/PPSSPP_1.11-testbuild_Win32x64.zip?dl=0
Android(ARMv7): https://www.dropbox.com/s/b41bm43mtn1gpnn/PPSSPP_1.11-testbuild_ARMv7.apk?dl=0
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Messages In This Thread
PPSSPP Networking Info Thread - Zinx777 - 09-05-2020, 03:51 AM
RE: PPSSPP Ad-hoc general info thread - AdamN - 02-03-2021 02:06 AM
RE: PPSSPP Networking Info Thread - AdamN - 03-12-2021, 07:31 AM
RE: PPSSPP Networking Info Thread - AdamN - 03-06-2021, 12:08 PM
RE: PPSSPP Networking Info Thread - AdamN - 03-07-2021, 01:56 AM
RE: PPSSPP Networking Info Thread - AdamN - 03-11-2021, 01:43 AM
RE: PPSSPP Networking Info Thread - AdamN - 03-11-2021, 04:42 AM
RE: PPSSPP Networking Info Thread - AdamN - 03-11-2021, 06:26 AM
RE: PPSSPP Networking Info Thread - AdamN - 03-11-2021, 04:08 PM
RE: PPSSPP Networking Info Thread - AdamN - 03-12-2021, 01:21 PM
RE: PPSSPP Networking Info Thread - AdamN - 03-12-2021, 09:11 PM
RE: PPSSPP Networking Info Thread - AdamN - 03-13-2021, 06:01 AM
RE: PPSSPP Networking Info Thread - AdamN - 03-13-2021, 06:43 PM
RE: PPSSPP Networking Info Thread - AdamN - 03-13-2021, 07:55 PM
RE: PPSSPP Networking Info Thread - AdamN - 03-15-2021, 07:35 PM
RE: PPSSPP Networking Info Thread - AdamN - 03-16-2021, 06:23 AM
RE: PPSSPP Networking Info Thread - AdamN - 03-16-2021, 01:15 PM
RE: PPSSPP Networking Info Thread - AdamN - 03-26-2021, 09:00 AM
RE: PPSSPP Networking Info Thread - AdamN - 03-26-2021, 12:58 PM
RE: PPSSPP Networking Info Thread - AdamN - 03-26-2021, 05:01 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-01-2021, 06:53 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-02-2021, 05:13 AM
RE: PPSSPP Networking Info Thread - AdamN - 04-02-2021, 11:39 AM
RE: PPSSPP Networking Info Thread - AdamN - 04-02-2021, 12:26 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-03-2021, 06:40 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-04-2021, 12:08 AM
RE: PPSSPP Networking Info Thread - AdamN - 04-05-2021, 09:05 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-06-2021, 07:30 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-07-2021, 06:14 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-07-2021, 07:42 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-08-2021, 08:03 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-10-2021, 12:54 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-13-2021, 01:43 PM
RE: PPSSPP Networking Info Thread - AdamN - 04-13-2021, 08:13 PM

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