[Bug 46940] New: GTA 5 clients cannot connect to each other behind home router

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=46940

            Bug ID: 46940
           Summary: GTA 5 clients cannot connect to each other behind home
                    router
           Product: Wine
           Version: 4.5
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: electrodexsnet at gmail.com
      Distribution: ---

When the game is running, it seems to be unable to do anything that requires
the ability to host a direct connection. In most circumstances this is not
noticeable as the game will fall back to using rockstar servers when direct is
not available.

However, if you have multiple players behind the same home router, they will
experience symptoms of this issue, as the game expects to be able to use
p2p/direct connectivity between clients on a home network.

This includes:

* Inability to join an invite-only or friend-only session hosted by either

* Inability to join a public (or hosted by another player) session if either
player is already in it; as soon as one connects, the other cannot join, and
vice-versa. This can be worked around consistently by disabling UPnP on the
home router. Workaround only works for joining public sessions.

* Inability to join a heist hosted by either (even when started from a public
or 3rd-party hosted session)


These were tested and confirmed with 4 accounts at 4 computers at 2 locations.
Tested with respective firewalls enabled/disabled. Players at different
locations could connect to each other without issue; players at the same
location could not.


This issue does not manifest if one of the computers is Windows [tested W10
build 1803]. It can join or be joined to local friend-only/private sessions as
you'd expect.




====Steps used to produce logs (on Majaro Linux)====

(Did steps on 2 computers running separate instances of GTA 5)

sudo pacman -S --needed --noconfirm wine-staging wine-mono wine_gecko
winetricks lib32-gtk3 lib32-mpg123 mpg123 yay
WINEPREFIX=~/.wine_vulkan winetricks -q allfonts steam
yay -S --noconfirm dxvk-bin
WINEPREFIX=~/.wine_vulkan setup_dxvk install
WINEDLLOVERRIDES=winedbg.exe=d WINEPREFIX=~/.wine_vulkan wine Steam.exe

Launch game in Story Mode, then launch a Friend-only Online session.
Once both are at this point, try connecting either of them to the other.


GTA On-screen Messages:
Alert: Getting GTA Online session details
Alert: Unable to connect to game session.




========================

This affects both wine and wine-staging, but I could not get logs from vanilla
wine as GTA 5 in recent versions does not get past the socialclub launcher. 

This also affects Proton. I've limited the logs scope to just wine for this
report, but you can find the related Proton reports here:
https://github.com/ValveSoftware/Proton/issues/37#issuecomment-445510575
https://github.com/ValveSoftware/Proton/issues/37#issuecomment-478411346

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