├── .gitignore ├── Cargo.toml ├── LICENSE ├── ORIGINAL_README.md ├── README.md └── src ├── framerate └── mod.rs ├── ldn ├── latency_slider │ └── mod.rs ├── mod.rs └── net │ ├── interface.rs │ └── mod.rs ├── lib.rs └── utils └── mod.rs /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | Cargo.lock 3 | yuzu_build.ps1 4 | ryujinx_build.ps1 -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "local-latency-slider" 3 | version = "3.1.0" 4 | authors = ["blu-dev", "saad-script"] 5 | edition = "2021" 6 | 7 | [package.metadata.skyline] 8 | titleid = "01006A800016E000" # Smash Ultimate 9 | 10 | [lib] 11 | crate-type = ["cdylib"] 12 | 13 | [dependencies] 14 | ninput = { git = "https://github.com/blu-dev/ninput" } 15 | skyline = { git = "https://github.com/ultimate-research/skyline-rs" } 16 | libc-nnsdk = { git = "https://github.com/ultimate-research/libc-nnsdk" } 17 | 18 | [profile.dev] 19 | panic = "abort" 20 | 21 | [profile.release] 22 | panic = "abort" 23 | lto = true 24 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. 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It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | -------------------------------------------------------------------------------- /ORIGINAL_README.md: -------------------------------------------------------------------------------- 1 | Well, I suppose that the cat is out of the bag, yeah? Someone has ported the input latency adjustment part of HDR to vanilla. 2 | 3 | Since I co-authored this feature, I think it is fair that I explain how it works so that misinformation about it being "fair" or anything like that doesn't spread. 4 | 5 | # Client Side Only 6 | Honestly, we aren't quite sure why the SSBU development team did not synchronize this between players, it should have been one of the key things they did synchronize to ensure fair play. 7 | 8 | The easiest way to explain this is: 9 | - Player A: Has the mod and has set their latency to 2 frames. 10 | - Player B: Does not have the mod, Smash Ultimate assigns them 5 frames by default. 11 | 12 | Assuming there is no stuttering in this game, Player A is about to play the *same exact game* as player B, but with 3 frames less (48 milliseconds) delay than player B. 13 | 14 | This is very problematic. It means that in any online situation, one player can have a very real and very influential advantage. 15 | 16 | 48ms is far less than the average human reaction time, for sure. However in vanilla Ultimate online, you are guaranteed a minimum of 10 frames of input delay: 2 frames from the game being triple buffered, 4 frames from the Nintendo Switch's input drivers being slow, and 4 frames as the bare minimum amount you can get online. When are dealing with a reference value of 10 frames, any single frame makes a big impact on both game feel and ability to react. This advantage is real, and will hurt competition. 17 | 18 | It is important to note, as much confusion has presented itself, that instead of the 10f base that you have in Vanilla Ultimate, you can now have a 7f base for input delay. The input slider value replaces the 4f provided by ultimate. 19 | 20 | # "How does it not lag?" 21 | This gets a little bit complex, but bare with me. 22 | 23 | It is not feasible, in a production environment, to synchronize enough information between all parties in order to properly get one-way ping. This means that when your ping is calculated, it is calculated as a round trip time between you and the other party. What does this mean? 24 | 25 | It means that the ping that you see is calculated via something like this: 26 | ``` 27 | roundtrip_ping = your_ping_to_them + their_ping_to_you 28 | ``` 29 | `your_ping_to_them` and `their_ping_to_you` we don't know the value of, only their sum. 30 | 31 | So we do the next best thing and average it, the ping you get reported is 32 | ``` 33 | your_ping = roundtrip_ping / 2 = (your_ping_to_them + their_ping_to_you) / 2 34 | ``` 35 | So let's think about what that means if your calculated ping to another player is supposedly 120ms 36 | ``` 37 | your_ping = 120ms 38 | 120ms = roundtrip_ping / 2 39 | 240ms = roundtrip_ping 40 | 240ms = your_ping_to_them + their_ping_to_you 41 | ``` 42 | 43 | With those last two values, anything that properly sums to 240ms are valid, meaning one player could have `40ms` one-way ping and the other could have `200ms` one-way ping. This allows players to have different input latency on client side. Ideally they would be synchronized online to whichever one is higher to ensure fair play, however it's a safe assumption on the Ultimate devs' side of things that the roundtrip ping would be the same between both players and therefore both values of input latency would be identical 44 | 45 | # So why does this matter? 46 | When we released this for HewDraw Remix (please just call it HDR guys I beg), there were a few things that we had going in our environment that we could, not necessarily safely, but fairly ignore the glaring issues with introducing something like this: 47 | - It was included in the HDR plugin, so it could not be disabled or enabled directly 48 | - HDR disables the quickplay button, meaning you cannot play quickplay at all. 49 | - HDR immediately desyncs if the other player in a battle arena does not have HDR installed. 50 | 51 | All of these combined ensure that in any situation where you are able to use the online latency adjuster, the other player(s) are able to use it as well. 52 | 53 | That's no longer the case. 54 | 55 | The released plugin (which, as a side note, violated HDR license by not including the modified source code. they also attributed the feature to the wrong plugin, good job random GameBanana user) was advertised to be able to work on quickplay as long as you set the latency in an arena first. You can play with literally anybody, whether that is MkLeo or little Timmy who just got a Switch for Christmas. Playing with *anybody* and giving yourself an advantage is the problem here. 56 | 57 | # "So you care about competitive integrity?" 58 | Hell no. I don't, basically none of the HDR team does (at least for WiFi tournaments). But you know who does? Nintendo. 59 | 60 | You know who hosts tournaments, even if they are basically for scraps, on WiFi? Nintendo. 61 | 62 | This kind of modding could also very easily be considered illegal in Japan, (where it would have a much bigger impact as their network infrastructure and geographical location is much better for this kind of mod), so it is entirely likely that if this gets spread around and used for illegitimate reasons, Nintendo will take action against the users, and if they update Smash again likely against the modding scene. 63 | 64 | It's frustrating that something I've worked on even has the potential to bring about this result but it is what it is, there's no going back at this point. 65 | 66 | This Twitter thread does a great job explaining what I am too emotionally exhausted to present: https://twitter.com/willy_crescent/status/1602701257365389312 67 | 68 | # "How many frames does it actually save?" 69 | In offline Ultimate, there are 6 frames of input delay on a good monitor. 2 of those are from the game's graphics pipeline being triple-buffered, and the other 4 are from the Nintendo Switch's input drivers. 70 | 71 | When playing online, Ultimate assigns you a bare minimum of 4 frames of additional input delay, with more being added on depending on the ping (see above) you have to the other player(s) you are playing with. 72 | 73 | The mod allows you to pick any number for those additional frames, between 0 and 25. If both players have a good connection, i.e. fiber + LAN or something equivalent, and are somewhat close geographically, you can set that number down to 2f consistently, sometimes 1f. I (AZ) can play with someone else (CA) consistently on 2f and then when my internet is having a good day I can play on 1f. 74 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | I took blue-dev's code for the original arena latency slider mod and modified it so that it only works with local online. I also added in options to change the game's framerate to get even lower input delay. You can see the [original readme](./ORIGINAL_README.md) to get details as to how exactly the mod changes the online latency. 2 | 3 | ## Installation 4 | 5 | 1) Make sure you have the latest [skyline](https://github.com/skyline-dev/skyline/releases) installed on yuzu: 6 | ``` 7 | %yuzu_folder%/sdmc/atmosphere/contents/01006A800016E000/exefs/ 8 | ├── subsdk9 9 | └── main.npdm 10 | ``` 11 | 2) Download the latest `liblocal_latency_slider.nro` from the [releases](https://github.com/saad-script/local-latency-slider/releases) page. 12 | Place it in the corresponding folder. This is how it should look: 13 | ``` 14 | %yuzu_folder%/sdmc/atmosphere/contents/01006A800016E000/romfs/skyline/plugins/liblocal_latency_slider.nro 15 | ``` 16 | 17 | ## Usage 18 | 19 | - This mod is intended for use with the yuzu emulator. Some functionality like the framerate options may not work on a real switch or other emulators. 20 | - This mod will only work in local online modes. It is intended to be used with yuzu's LDN capabilities to provide an online experience that is very close to the feel of playing offline (and sometimes even identical to offline!) 21 | - Make sure that yuzu's speed limit is set to 100%. Make sure the previous 120 fps cheat is disabled/removed. 22 | - Due to a current yuzu bug, make sure to connect to LDN **after** launching smash. Otherwise yuzu will crash when loading the game. 23 | - As a QOL feature, new smash LDN rooms will be set to have 2 players by default. (You can increase/decrease this yourself) 24 | - The top of the character select screen will display your selected framerate and delay. It will also show the ping of the room (determined by the average ping of all opponent players). Red = Unstable Connection, Yellow = Playable Connection, Green = Stable Connection. 25 | - Under each player you can see their selected framerate and delay. You can also see the ping of each individual players (see bullet point below). 26 | - In the character select screen, you can do any of the following: 27 | - Use DPAD left/right to change the online delay set by the game. 28 | - Use DPAD up/down to change the target framerate. 120 fps removes 3f of delay, 180 fps removes 4 frames of delay, and 240 fps removes 4.5 frames of delay. 29 | - Press X to toggle VSYNC on/off (only available when playing on 60 fps). This is useful if you dont have a PC capable of reaching higher framerates like 120 fps, but still want to enjoy the lower delay. This can remove upto 3 frames of delay. 30 | - Press either the left or right control stick to view the individual pings of opponent players. Altervatively, if you are playing on a gamecube controller you can press L + R at the same time to show the individual pings. (Displayed under each connected player) 31 | 32 | ## Troubleshooting & FAQ 33 | 34 | - "I can't enter the local online menu" 35 | - Ensure that you have the latest skyline is installed. Previous versions had a bug that did not allow you to enter to local wireless menu. 36 | - "Yuzu crashes when launching the game" 37 | - Make sure to connect to LDN **after** launching smash. If the issue still persists you may have to delete your shaders. 38 | - "I set the online delay to a low value but the game still feels very slow and stuttery" 39 | - Setting the delay too low will cause that. Set the delay based on your proximity to your opponent. Also, both of you should be wired to ethernet on a good network/IPS. You should never set the delay lower than 2f, as that has never worked even on computers wired directly to the same network. 40 | - "The game seems to speeds up randomly" 41 | - Make sure your computer is actually capable of reaching the target framerate. If you have the target framerate set to 120 fps, your PC should be able to maintain a solid 120 fps in game. Also make sure that yuzu's speed limit is set to 100% and that you are not using the previous 120 fps cheat. 42 | - "There are random stutters that occur in game" 43 | - Shader stutters will happen the first time you do a move/action in yuzu. Yuzu will compile and store these shaders so the next time you do the move, it won't stutter. The more you play the less these stutter will happen. It is recommended that you dedicate a game where you and your opponent will hit each other with all of your moves, so in subsequent games these stutters won't occur. 44 | 45 | Check out the [NA](https://discord.gg/jE9hTsmbjD) or [EU](https://discord.gg/yuzu-smash-meet-up-1051577844318339172) yuzu smash discord for more information and also matchmaking! 46 | 47 | 48 | ## Known Issues 49 | - If a players yuzu crashes, or disconnects unexpectedly, the room ping and opponent info (framerate, delay, ping) may not show the correct values or may show under the wrong person. To fix this, the room host will have to exit the room by backing out into the local online menu and create a room again. 50 | - If 2 or more players are playing on the same yuzu, the opponent info (framerate, delay, ping) may show under the wrong person or not show at all. 51 | - If you notice any other issues, you can report them here or in the discord servers mentioned above. 52 | - If you know how to solve these issues, contributions are always welcome. 53 | -------------------------------------------------------------------------------- /src/framerate/mod.rs: -------------------------------------------------------------------------------- 1 | use std::sync::atomic::{AtomicBool, AtomicU32, Ordering}; 2 | 3 | use crate::ldn; 4 | use crate::utils; 5 | use skyline::hooks::InlineCtx; 6 | 7 | const DEFAULT_TARGET_FRAMERATE: u32 = 60; 8 | const MAX_TARGET_FRAMERATE: u32 = 240; 9 | const TARGET_FRAMERATE_INC: u32 = 60; 10 | 11 | #[derive(Debug)] 12 | pub struct FramerateConfig { 13 | target_framerate: AtomicU32, 14 | is_vsync_enabled: AtomicBool, 15 | } 16 | 17 | impl FramerateConfig { 18 | pub fn load_from(&self, framerate_config: &FramerateConfig) { 19 | self.target_framerate.store( 20 | framerate_config.target_framerate.load(Ordering::SeqCst), 21 | Ordering::SeqCst, 22 | ); 23 | self.is_vsync_enabled.store( 24 | framerate_config.is_vsync_enabled.load(Ordering::SeqCst), 25 | Ordering::SeqCst, 26 | ); 27 | } 28 | pub const fn default() -> Self { 29 | FramerateConfig { 30 | target_framerate: AtomicU32::new(60), 31 | is_vsync_enabled: AtomicBool::new(true), 32 | } 33 | } 34 | } 35 | 36 | impl Clone for FramerateConfig { 37 | fn clone(&self) -> Self { 38 | FramerateConfig { 39 | target_framerate: AtomicU32::new(self.target_framerate.load(Ordering::SeqCst)), 40 | is_vsync_enabled: AtomicBool::new(self.is_vsync_enabled.load(Ordering::SeqCst)), 41 | } 42 | } 43 | } 44 | 45 | impl ToString for FramerateConfig { 46 | fn to_string(&self) -> String { 47 | let vsync_indicator = match self.is_vsync_enabled.load(Ordering::SeqCst) { 48 | true => "", 49 | false => "++", 50 | }; 51 | format!( 52 | "{} FPS{}", 53 | self.target_framerate.load(Ordering::SeqCst), 54 | vsync_indicator 55 | ) 56 | } 57 | } 58 | 59 | static FRAMERATE_CONFIG: FramerateConfig = FramerateConfig::default(); 60 | 61 | #[skyline::hook(offset = 0x135caf8, inline)] 62 | unsafe fn on_game_speed_calc(_: &InlineCtx) { 63 | if !ldn::is_local_online() { 64 | return; 65 | } 66 | set_internal_framerate(3600 / FRAMERATE_CONFIG.target_framerate.load(Ordering::SeqCst)); 67 | } 68 | 69 | #[skyline::hook(offset = 0x374779c, inline)] 70 | unsafe fn scene_update(_: &InlineCtx) { 71 | static mut PREV_TICK: Option = None; 72 | if !ldn::is_local_online() { 73 | return; 74 | } 75 | let target_framerate = FRAMERATE_CONFIG.target_framerate.load(Ordering::SeqCst); 76 | let vsync_enabled = FRAMERATE_CONFIG.is_vsync_enabled.load(Ordering::SeqCst); 77 | set_framerate_target(target_framerate); 78 | set_vsync_enabled(vsync_enabled); 79 | if vsync_enabled { 80 | return; 81 | } 82 | let target_ticks = utils::get_tick_freq() / target_framerate as u64; 83 | if let Some(prev_tick) = PREV_TICK { 84 | loop { 85 | let elapsed_ticks = skyline::nn::os::GetSystemTick() - prev_tick; 86 | if elapsed_ticks >= target_ticks { 87 | break; 88 | } 89 | } 90 | } 91 | PREV_TICK = Some(skyline::nn::os::GetSystemTick()); 92 | } 93 | 94 | unsafe fn set_swap_interval(swap_interval: i32) { 95 | let base_addr = skyline::hooks::getRegionAddress(skyline::hooks::Region::Text) as u64; 96 | let r = *((base_addr + 0x6d43430) as *const u64); 97 | let r = *((r + 0x10) as *const u64); 98 | let r = (r + 0xF14) as *mut i32; 99 | *r = swap_interval; 100 | } 101 | 102 | unsafe fn set_internal_framerate(internal_framerate: u32) { 103 | let base_addr = skyline::hooks::getRegionAddress(skyline::hooks::Region::Text) as u64; 104 | let internal_frame_rate_addr = base_addr + 0x523d004; 105 | *(internal_frame_rate_addr as *mut u32) = internal_framerate 106 | } 107 | 108 | pub fn set_framerate_target(target_framerate: u32) { 109 | unsafe { 110 | FRAMERATE_CONFIG 111 | .target_framerate 112 | .store(target_framerate, Ordering::SeqCst); 113 | set_internal_framerate(3600 / target_framerate); 114 | } 115 | } 116 | 117 | pub fn set_vsync_enabled(vsync_enabled: bool) { 118 | unsafe { 119 | let target_framerate = FRAMERATE_CONFIG.target_framerate.load(Ordering::SeqCst); 120 | FRAMERATE_CONFIG 121 | .is_vsync_enabled 122 | .store(vsync_enabled, Ordering::SeqCst); 123 | match (vsync_enabled, target_framerate == 60) { 124 | (true, false) => set_swap_interval(((target_framerate as f64 / 60.0) * 100.0) as i32), 125 | (false, _) => set_swap_interval(10000), 126 | _ => set_swap_interval(1), 127 | } 128 | } 129 | } 130 | 131 | pub fn get_framerate_config() -> &'static FramerateConfig { 132 | &FRAMERATE_CONFIG 133 | } 134 | 135 | pub fn poll() { 136 | let pressed_buttons = utils::poll_buttons(&[ 137 | ninput::Buttons::UP, 138 | ninput::Buttons::DOWN, 139 | ninput::Buttons::X, 140 | ]); 141 | let mut target_framerate = FRAMERATE_CONFIG.target_framerate.load(Ordering::SeqCst); 142 | let vsync_enabled = FRAMERATE_CONFIG.is_vsync_enabled.load(Ordering::SeqCst); 143 | match pressed_buttons { 144 | ninput::Buttons::UP => { 145 | if vsync_enabled { 146 | target_framerate += TARGET_FRAMERATE_INC; 147 | } 148 | } 149 | ninput::Buttons::DOWN => { 150 | if vsync_enabled { 151 | target_framerate -= TARGET_FRAMERATE_INC; 152 | } 153 | } 154 | ninput::Buttons::X => { 155 | if target_framerate == DEFAULT_TARGET_FRAMERATE { 156 | FRAMERATE_CONFIG 157 | .is_vsync_enabled 158 | .store(!vsync_enabled, Ordering::SeqCst); 159 | } 160 | } 161 | _ => (), 162 | } 163 | let new_target_framerate = 164 | target_framerate.clamp(DEFAULT_TARGET_FRAMERATE, MAX_TARGET_FRAMERATE); 165 | FRAMERATE_CONFIG 166 | .target_framerate 167 | .store(new_target_framerate, Ordering::SeqCst); 168 | } 169 | 170 | pub fn install() { 171 | skyline::install_hooks!(scene_update, on_game_speed_calc); 172 | } 173 | -------------------------------------------------------------------------------- /src/ldn/latency_slider/mod.rs: -------------------------------------------------------------------------------- 1 | use std::sync::atomic::{AtomicI8, Ordering}; 2 | 3 | use skyline::hooks::InlineCtx; 4 | 5 | use crate::ldn; 6 | use crate::utils; 7 | 8 | const MAX_INPUT_BUFFER: u8 = 25; 9 | 10 | #[derive(Debug)] 11 | pub struct Delay { 12 | buffer: AtomicI8, 13 | last_auto: AtomicI8, 14 | } 15 | 16 | impl Delay { 17 | fn next(&self) { 18 | let prev_delay = self.buffer.load(Ordering::SeqCst); 19 | self.buffer.store( 20 | (prev_delay + 1).min(MAX_INPUT_BUFFER as i8), 21 | Ordering::SeqCst, 22 | ); 23 | } 24 | fn prev(&self) { 25 | let prev_delay = self.buffer.load(Ordering::SeqCst); 26 | self.buffer 27 | .store((prev_delay - 1).max(-1), Ordering::SeqCst); 28 | } 29 | pub fn load_from(&self, delay: &Delay) { 30 | self.buffer 31 | .store(delay.buffer.load(Ordering::SeqCst), Ordering::SeqCst); 32 | self.last_auto 33 | .store(delay.last_auto.load(Ordering::SeqCst), Ordering::SeqCst); 34 | } 35 | pub const fn default() -> Self { 36 | Delay { 37 | buffer: AtomicI8::new(4), 38 | last_auto: AtomicI8::new(-1), 39 | } 40 | } 41 | } 42 | 43 | impl Clone for Delay { 44 | fn clone(&self) -> Self { 45 | Delay { 46 | buffer: AtomicI8::new(self.buffer.load(Ordering::SeqCst)), 47 | last_auto: AtomicI8::new(self.last_auto.load(Ordering::SeqCst)), 48 | } 49 | } 50 | } 51 | 52 | impl ToString for Delay { 53 | fn to_string(&self) -> String { 54 | let buffer = self.buffer.load(Ordering::SeqCst); 55 | let last_auto = self.last_auto.load(Ordering::SeqCst); 56 | match (buffer >= 0, last_auto >= 0) { 57 | (false, false) => String::from("Auto"), 58 | (false, true) => format!("Auto ({}f)", last_auto).to_string(), 59 | (true, _) => format!("{}f", buffer).to_string(), 60 | } 61 | } 62 | } 63 | 64 | static CURRENT_INPUT_DELAY: Delay = Delay::default(); 65 | 66 | #[skyline::hook(offset = 0x16ccc58, inline)] 67 | unsafe fn set_online_latency(ctx: &InlineCtx) { 68 | if ldn::is_local_online() { 69 | let auto = *(*ctx.registers[19].x.as_ref() as *mut u8); 70 | let buffer = CURRENT_INPUT_DELAY.buffer.load(Ordering::SeqCst); 71 | CURRENT_INPUT_DELAY 72 | .last_auto 73 | .store(auto as i8, Ordering::SeqCst); 74 | if buffer >= 0 { 75 | *(*ctx.registers[19].x.as_ref() as *mut u8) = buffer as u8; 76 | } 77 | } 78 | } 79 | 80 | pub fn current_input_delay() -> &'static Delay { 81 | &CURRENT_INPUT_DELAY 82 | } 83 | 84 | pub fn poll() { 85 | let pressed_buttons = utils::poll_buttons(&[ninput::Buttons::LEFT, ninput::Buttons::RIGHT]); 86 | match pressed_buttons { 87 | ninput::Buttons::LEFT => CURRENT_INPUT_DELAY.prev(), 88 | ninput::Buttons::RIGHT => CURRENT_INPUT_DELAY.next(), 89 | _ => (), 90 | } 91 | } 92 | 93 | pub(super) fn install() { 94 | skyline::install_hook!(set_online_latency); 95 | } 96 | -------------------------------------------------------------------------------- /src/ldn/mod.rs: -------------------------------------------------------------------------------- 1 | pub mod latency_slider; 2 | pub mod net; 3 | 4 | use std::sync::atomic::{AtomicBool, AtomicU64, Ordering}; 5 | 6 | use crate::framerate; 7 | use crate::ldn::net::interface::{get_network_role, NetworkRole}; 8 | use crate::utils::TextBoxExt; 9 | use skyline::hooks::InlineCtx; 10 | use skyline::nn::ui2d::Pane; 11 | 12 | static mut CUSTOM_CSS_NUM_PLAYERS_FLAG: bool = false; 13 | 14 | static LOCAL_ROOM_PANE_HANDLE: AtomicU64 = AtomicU64::new(0); 15 | // workaround for sv_information::is_ready_go() being unreliable for ldn in some cases 16 | static IN_GAME: AtomicBool = AtomicBool::new(false); 17 | 18 | #[skyline::hook(offset = 0x22d9d10, inline)] 19 | unsafe fn online_melee_any_scene_create(_: &InlineCtx) { 20 | LOCAL_ROOM_PANE_HANDLE.store(0, Ordering::SeqCst); 21 | framerate::set_framerate_target(60); 22 | framerate::set_vsync_enabled(true); 23 | } 24 | 25 | #[skyline::hook(offset = 0x22d9c40, inline)] 26 | unsafe fn bg_matchmaking_seq(_: &InlineCtx) { 27 | LOCAL_ROOM_PANE_HANDLE.store(0, Ordering::SeqCst); 28 | framerate::set_framerate_target(60); 29 | framerate::set_vsync_enabled(true); 30 | } 31 | 32 | #[skyline::hook(offset = 0x235a650, inline)] 33 | unsafe fn main_menu(_: &InlineCtx) { 34 | LOCAL_ROOM_PANE_HANDLE.store(0, Ordering::SeqCst); 35 | framerate::set_framerate_target(60); 36 | framerate::set_vsync_enabled(true); 37 | } 38 | 39 | // called on local online menu init 40 | #[skyline::hook(offset = 0x1bd45e0, inline)] 41 | unsafe fn store_local_menu_pane(ctx: &InlineCtx) { 42 | update_in_game_flag(false); 43 | CUSTOM_CSS_NUM_PLAYERS_FLAG = true; 44 | let handle = *((*((*ctx.registers[0].x.as_ref() + 8) as *const u64) + 0x10) as *const u64); 45 | LOCAL_ROOM_PANE_HANDLE.store(handle, Ordering::SeqCst); 46 | } 47 | 48 | #[skyline::hook(offset = 0x1bd7a80, inline)] 49 | unsafe fn update_local_menu(_: &InlineCtx) { 50 | let pane_handle = LOCAL_ROOM_PANE_HANDLE.load(Ordering::SeqCst) as *mut u64 as *mut Pane; 51 | if !pane_handle.is_null() { 52 | latency_slider::poll(); 53 | let delay_str = latency_slider::current_input_delay().to_string(); 54 | (*pane_handle) 55 | .as_textbox() 56 | .set_text_string(&format!("{}", delay_str)); 57 | } 58 | } 59 | 60 | #[skyline::hook(offset = 0x1a26200)] 61 | unsafe fn css_player_pane_num_changed(param_1: i64, prev_num: i32, changed_by_player: u32) { 62 | if is_local_online() 63 | && CUSTOM_CSS_NUM_PLAYERS_FLAG 64 | && changed_by_player == 0 65 | && get_network_role() == NetworkRole::Host 66 | { 67 | CUSTOM_CSS_NUM_PLAYERS_FLAG = false; 68 | *((param_1 + 0x160) as *mut i32) = 2; 69 | } 70 | call_original!(param_1, prev_num, changed_by_player); 71 | } 72 | 73 | #[skyline::hook(offset = 0x1345558, inline)] 74 | unsafe fn on_match_start(_: &InlineCtx) { 75 | if !is_local_online() { 76 | return; 77 | } 78 | update_in_game_flag(true); 79 | } 80 | 81 | #[skyline::hook(offset = 0x1d68b94, inline)] 82 | unsafe fn on_match_end(_: &InlineCtx) { 83 | if !is_local_online() { 84 | return; 85 | } 86 | update_in_game_flag(false); 87 | } 88 | 89 | fn update_in_game_flag(new_in_game_flag: bool) { 90 | let _ = IN_GAME.compare_exchange( 91 | !new_in_game_flag, 92 | new_in_game_flag, 93 | Ordering::SeqCst, 94 | Ordering::SeqCst, 95 | ); 96 | } 97 | 98 | pub fn is_local_online() -> bool { 99 | return LOCAL_ROOM_PANE_HANDLE.load(Ordering::SeqCst) > 0; 100 | } 101 | 102 | pub fn is_in_game() -> bool { 103 | IN_GAME.load(Ordering::SeqCst) 104 | } 105 | 106 | pub fn install() { 107 | skyline::install_hooks!( 108 | online_melee_any_scene_create, 109 | bg_matchmaking_seq, 110 | main_menu, 111 | store_local_menu_pane, 112 | update_local_menu, 113 | css_player_pane_num_changed, 114 | on_match_start, 115 | on_match_end, 116 | ); 117 | latency_slider::install(); 118 | net::install(); 119 | } 120 | -------------------------------------------------------------------------------- /src/ldn/net/interface.rs: -------------------------------------------------------------------------------- 1 | use std::net::{IpAddr, Ipv4Addr, SocketAddr, UdpSocket}; 2 | use std::sync::atomic::{AtomicBool, Ordering}; 3 | use std::sync::Mutex; 4 | use std::time::Duration; 5 | 6 | use crate::framerate::{self, FramerateConfig}; 7 | use crate::ldn::latency_slider::{self, Delay}; 8 | use crate::utils; 9 | 10 | extern "C" { 11 | #[link_name = "\u{1}_ZN2nn3ldn14GetNetworkInfoEPNS0_11NetworkInfoE"] 12 | pub fn get_network_info(out_buffer_ptr: *mut NetworkInfo); 13 | } 14 | 15 | extern "C" { 16 | #[link_name = "\u{1}_ZN2nn3ldn13CreateNetworkERKNS0_13NetworkConfigERKNS0_14SecurityConfigERKNS0_10UserConfigE"] 17 | pub fn create_network(network_config: u64, security_config: u64, user_config: u64); 18 | } 19 | 20 | extern "C" { 21 | #[link_name = "\u{1}_ZN2nn3ldn7ConnectERKNS0_11NetworkInfoERKNS0_14SecurityConfigERKNS0_10UserConfigEiNS0_13ConnectOptionE"] 22 | pub fn connect_network( 23 | network_info: *mut NetworkInfo, 24 | security_config: u64, 25 | user_config: u64, 26 | local_comm_ver: i32, 27 | connect_option: u32, 28 | ); 29 | } 30 | 31 | extern "C" { 32 | #[link_name = "\u{1}_ZN2nn3ldn10DisconnectEv"] 33 | pub fn disconnect_network(); 34 | } 35 | 36 | extern "C" { 37 | #[link_name = "\u{1}_ZN2nn3ldn14DestroyNetworkEv"] 38 | pub fn destroy_network(); 39 | } 40 | 41 | extern "C" { 42 | #[link_name = "\u{1}_ZN2nn3ldn8GetStateEv"] 43 | pub fn get_network_state() -> NetworkState; 44 | } 45 | 46 | extern "C" { 47 | #[link_name = "\u{1}_ZN2nn3ldn4ScanEPNS0_11NetworkInfoEPiiRKNS0_10ScanFilterEi"] 48 | pub fn scan_network( 49 | network_info: *mut NetworkInfo, 50 | num_networks_found: *mut i32, 51 | max_num_networks: i32, 52 | scan_filter: u64, 53 | _param_5: i32, 54 | ); 55 | 56 | } 57 | 58 | extern "C" { 59 | #[link_name = "\u{1}_ZN2nn3ldn14GetIpv4AddressEPNS0_11Ipv4AddressEPNS0_10SubnetMaskE"] 60 | pub fn get_ipv4_address(ip_address: *mut RawIPv4Address, subnet_mask: *mut RawIPv4Address); 61 | } 62 | 63 | pub fn get_network_address(port: u16) -> SocketAddr { 64 | let ip_buffer = [0; 4].as_mut_ptr() as *mut RawIPv4Address; 65 | let subnet_buffer = [0; 4].as_mut_ptr() as *mut RawIPv4Address; 66 | unsafe { 67 | get_ipv4_address(ip_buffer, subnet_buffer); 68 | let ip = (*ip_buffer).to_socket_address(port); 69 | return ip; 70 | } 71 | } 72 | 73 | #[repr(C, align(4))] 74 | #[derive(Debug, Clone)] 75 | pub struct RawIPv4Address(pub [u8; 4]); 76 | 77 | impl RawIPv4Address { 78 | pub fn to_socket_address(&self, port: u16) -> SocketAddr { 79 | SocketAddr::new( 80 | IpAddr::V4(Ipv4Addr::new(self.0[3], self.0[2], self.0[1], self.0[0])), 81 | port, 82 | ) 83 | } 84 | } 85 | 86 | pub fn try_get_network_info() -> std::io::Result> { 87 | unsafe { 88 | let state = get_network_state(); 89 | match state { 90 | NetworkState::AccessPointCreated | NetworkState::StationConnected => { 91 | let mut network_info_buffer: [u8; 0x480] = [0; 0x480]; 92 | let network_info_buffer = network_info_buffer.as_mut_ptr() as *mut NetworkInfo; 93 | 94 | get_network_info(network_info_buffer); 95 | Ok(Box::from_raw(network_info_buffer)) 96 | } 97 | _ => Err(std::io::Error::new( 98 | std::io::ErrorKind::NotConnected, 99 | "Unable to get network info", 100 | )), 101 | } 102 | } 103 | } 104 | 105 | pub fn get_network_role() -> NetworkRole { 106 | unsafe { 107 | let state = get_network_state(); 108 | match state { 109 | NetworkState::AccessPointCreated => NetworkRole::Host, 110 | NetworkState::StationConnected => NetworkRole::Client, 111 | _ => NetworkRole::None, 112 | } 113 | } 114 | } 115 | 116 | #[repr(C)] 117 | #[derive(Debug, Clone)] 118 | pub struct NodeInfo { 119 | pub ipv4_address: [u8; 4], // 0x0, 4 bytes 120 | pub mac_address: [u8; 6], // 0x4, 6 bytes 121 | pub node_id: u8, // 0xA, 1 byte 122 | pub is_connected: u8, // 0xB, 1 byte 123 | pub user_name: [u8; 33], // 0xC, 33 bytes (0x21 in decimal) 124 | _reserved_1: u8, // 0x2D, 1 byte 125 | pub local_communication_version: u16, // 0x2E, 2 bytes 126 | _reserved_2: [u8; 16], // 0x30, 16 bytes 127 | } 128 | #[repr(C)] 129 | #[derive(Debug, Clone)] 130 | pub struct NetworkInfo { 131 | pub local_communication_id: u64, // 0x0, 8 bytes 132 | _reserved_1: u16, // 0x8, 2 bytes 133 | pub arbitrary_user_data: u16, // 0xA, 2 bytes 134 | _reserved_2: u32, // 0xC, 4 bytes 135 | pub security_parameter_last: [u8; 16], // 0x10, 16 bytes 136 | pub mac_address: [u8; 6], // 0x20, 6 bytes 137 | pub ssid: [u8; 34], // 0x26, 34 bytes (0x22 in decimal) 138 | pub network_channel: i16, // 0x48, 2 bytes 139 | pub link_level: i8, // 0x4A, 1 byte 140 | pub action_frame_indicator: u8, // 0x4B, 1 byte 141 | _padding_1: [u8; 4], // 0x4C, 4 bytes 142 | pub security_parameter_first: [u8; 16], // 0x50, 16 bytes 143 | pub same_as_security_config: u16, // 0x60, 2 bytes 144 | pub accept_policy: u8, // 0x62, 1 byte 145 | pub action_frame_set: u8, // 0x63, 1 byte 146 | _padding_2: [u8; 2], // 0x64, 2 bytes 147 | pub maximum_participants: u8, // 0x66, 1 byte 148 | pub participant_num: u8, // 0x67, 1 byte 149 | pub node_info_array: [NodeInfo; 8], // 0x68, 0x200 (512 bytes, 8 * 64 bytes each) 150 | _reserved_3: [u8; 2], // 0x268, 2 bytes 151 | pub advertise_data_size: u16, // 0x26A, 2 bytes 152 | pub advertise_data: [u8; 384], // 0x26C, 0x180 (384 bytes) 153 | _reserved_4: [u8; 140], // 0x3EC, 140 bytes 154 | pub random_authentication_id: [u8; 8], // 0x478, 8 bytes 155 | } 156 | 157 | #[repr(u32)] 158 | #[derive(Debug)] 159 | #[allow(dead_code)] 160 | pub enum NetworkState { 161 | None = 0, 162 | Initialized = 1, 163 | AccessPoint = 2, 164 | AccessPointCreated = 3, 165 | Station = 4, 166 | StationConnected = 5, 167 | Error = 6, 168 | } 169 | 170 | #[derive(Debug, Clone, PartialEq)] 171 | pub enum NetworkRole { 172 | None, 173 | Host, 174 | Client, 175 | } 176 | 177 | #[derive(Debug, Clone, PartialEq)] 178 | pub enum NetworkThreadType { 179 | Listener, 180 | Sender, 181 | } 182 | 183 | #[repr(u8)] 184 | #[derive(Debug, Clone, PartialEq)] 185 | pub enum NetworkPacketType { 186 | Ping = 0, 187 | Pong = 1, 188 | } 189 | 190 | #[derive(Debug, Clone)] 191 | pub struct NetworkPacket { 192 | pub packet_type: NetworkPacketType, 193 | pub delay: Delay, 194 | pub framerate_config: FramerateConfig, 195 | timestamp: u64, 196 | } 197 | 198 | impl NetworkPacket { 199 | pub fn create_ping_packet() -> Self { 200 | let timestamp: u64; 201 | unsafe { 202 | timestamp = skyline::nn::os::GetSystemTick() as u64; 203 | } 204 | NetworkPacket { 205 | packet_type: NetworkPacketType::Ping, 206 | delay: latency_slider::current_input_delay().clone(), 207 | framerate_config: framerate::get_framerate_config().clone(), 208 | timestamp, 209 | } 210 | } 211 | 212 | pub fn create_pong_packet(packet: &NetworkPacket) -> Self { 213 | NetworkPacket { 214 | packet_type: NetworkPacketType::Pong, 215 | delay: latency_slider::current_input_delay().clone(), 216 | framerate_config: framerate::get_framerate_config().clone(), 217 | timestamp: packet.timestamp, 218 | } 219 | } 220 | 221 | pub fn get_time_elapsed(&self) -> Duration { 222 | utils::duration_since_tick(self.timestamp) 223 | } 224 | 225 | pub fn to_bytes(&self) -> &[u8] { 226 | unsafe { 227 | core::slice::from_raw_parts( 228 | self as *const Self as *const u8, 229 | core::mem::size_of::(), 230 | ) 231 | } 232 | } 233 | 234 | pub fn from_bytes(bytes: &[u8]) -> Self { 235 | unsafe { std::ptr::read(bytes.as_ptr() as *const Self) } 236 | } 237 | } 238 | 239 | pub enum NetworkStability { 240 | Stable, 241 | Inconsistent, 242 | Unstable, 243 | } 244 | 245 | #[derive(Debug, Clone)] 246 | pub struct NetworkDiagnostics { 247 | pings: [u64; 100], 248 | counter: usize, 249 | sum: u64, 250 | filled: bool, 251 | } 252 | 253 | impl NetworkDiagnostics { 254 | pub const fn new() -> Self { 255 | NetworkDiagnostics { 256 | pings: [0; 100], 257 | counter: 0, 258 | sum: 0, 259 | filled: false, 260 | } 261 | } 262 | 263 | pub fn register_ping(&mut self, ping: u64) { 264 | self.sum -= self.pings[self.counter]; 265 | self.sum += ping; 266 | self.pings[self.counter] = ping; 267 | self.counter = (self.counter + 1) % 100; 268 | if self.counter == 0 { 269 | self.filled = true; 270 | } 271 | } 272 | 273 | pub fn get_avg_ping(&self) -> Option { 274 | match (self.filled, self.counter == 0) { 275 | (true, _) => Some(self.sum / 100), 276 | (false, false) => Some(self.sum / self.counter as u64), 277 | (false, true) => None, 278 | } 279 | } 280 | 281 | pub fn get_network_stability(&self) -> NetworkStability { 282 | let avg = match self.get_avg_ping() { 283 | Some(a) => a, 284 | None => { 285 | return NetworkStability::Stable; 286 | } 287 | }; 288 | 289 | let mut var_sum: u64 = 0; 290 | let end = if self.filled { 100 } else { self.counter + 1 }; 291 | for i in 0..end { 292 | var_sum += (self.pings[i] - avg) * (self.pings[i] - avg) 293 | } 294 | 295 | let variance = if self.filled { 296 | var_sum as f64 / 99.0 297 | } else { 298 | var_sum as f64 / self.counter as f64 299 | }; 300 | 301 | if variance <= 25.0 { 302 | return NetworkStability::Stable; 303 | } else if variance <= 100.0 { 304 | return NetworkStability::Inconsistent; 305 | } else { 306 | return NetworkStability::Unstable; 307 | } 308 | } 309 | 310 | pub fn reset(&mut self) { 311 | self.pings = [0; 100]; 312 | self.counter = 0; 313 | self.sum = 0; 314 | self.filled = false; 315 | } 316 | } 317 | 318 | #[derive(Debug)] 319 | pub struct PlayerNetInfo { 320 | connected: AtomicBool, 321 | pub delay: Delay, 322 | pub framerate_config: FramerateConfig, 323 | pub net_diagnostics: Mutex, 324 | } 325 | 326 | impl PlayerNetInfo { 327 | pub const fn default() -> Self { 328 | PlayerNetInfo { 329 | connected: AtomicBool::new(false), 330 | delay: Delay::default(), 331 | framerate_config: FramerateConfig::default(), 332 | net_diagnostics: Mutex::new(NetworkDiagnostics::new()), 333 | } 334 | } 335 | 336 | pub fn set_connected(&self, connected: bool) { 337 | if let Ok(_updated) = self.connected.compare_exchange( 338 | !connected, 339 | connected, 340 | Ordering::SeqCst, 341 | Ordering::SeqCst, 342 | ) { 343 | if !connected { 344 | self.net_diagnostics.lock().unwrap().reset(); 345 | } 346 | } 347 | } 348 | 349 | pub fn is_connected(&self) -> bool { 350 | return self.connected.load(Ordering::SeqCst); 351 | } 352 | } 353 | 354 | pub trait UdpSocketExt { 355 | fn read(&self, buf: &mut [u8], blocking: bool) -> std::io::Result<(NetworkPacket, SocketAddr)>; 356 | fn write(&self, addr: &SocketAddr, packet: NetworkPacket) -> std::io::Result; 357 | } 358 | 359 | impl UdpSocketExt for UdpSocket { 360 | fn read( 361 | &self, 362 | buf: &mut [u8], 363 | blocking: bool, 364 | ) -> std::io::Result<(NetworkPacket, std::net::SocketAddr)> { 365 | self.set_nonblocking(!blocking)?; 366 | let (num_bytes, src_addr) = match self.recv_from(buf) { 367 | Ok((num_bytes, src_addr)) => (num_bytes, src_addr), 368 | Err(e) => { 369 | if e.raw_os_error() == Some(11) { 370 | return Err(std::io::ErrorKind::WouldBlock.into()); 371 | } else { 372 | return Err(e); 373 | } 374 | } 375 | }; 376 | 377 | Ok((NetworkPacket::from_bytes(&buf[0..num_bytes]), src_addr)) 378 | } 379 | 380 | fn write(&self, addr: &SocketAddr, packet: NetworkPacket) -> std::io::Result { 381 | self.send_to(packet.to_bytes(), addr) 382 | } 383 | } 384 | -------------------------------------------------------------------------------- /src/ldn/net/mod.rs: -------------------------------------------------------------------------------- 1 | pub mod interface; 2 | 3 | use interface::*; 4 | use std::net::{SocketAddr, UdpSocket}; 5 | use std::sync::Mutex; 6 | use std::thread; 7 | use std::time::{Duration, Instant}; 8 | 9 | use crate::ldn; 10 | 11 | const SEND_PORT: u16 = 3070; 12 | const LISTEN_PORT: u16 = 3080; 13 | 14 | static ROOM_NET_DIAGNOSTICS: Mutex = Mutex::new(NetworkDiagnostics::new()); 15 | static PLAYER_NET_STATS: [PlayerNetInfo; 8] = [ 16 | PlayerNetInfo::default(), 17 | PlayerNetInfo::default(), 18 | PlayerNetInfo::default(), 19 | PlayerNetInfo::default(), 20 | PlayerNetInfo::default(), 21 | PlayerNetInfo::default(), 22 | PlayerNetInfo::default(), 23 | PlayerNetInfo::default(), 24 | ]; 25 | 26 | #[skyline::hook(replace = scan_network)] 27 | unsafe fn on_network_scan( 28 | network_info: *mut NetworkInfo, 29 | num_networks_found: *mut i32, 30 | max_num_networks: i32, 31 | scan_filter: u64, 32 | _param_5: i32, 33 | ) { 34 | println!("Scanning network..."); 35 | call_original!( 36 | network_info, 37 | num_networks_found, 38 | max_num_networks, 39 | scan_filter, 40 | _param_5 41 | ); 42 | println!( 43 | "Found: {}, Max: {}, ?: {}", 44 | *num_networks_found, max_num_networks, _param_5 45 | ); 46 | } 47 | 48 | fn poll_listener(socket: &UdpSocket, buf: &mut [u8]) -> std::io::Result<()> { 49 | let (packet, mut src_addr) = match socket.read(buf, true) { 50 | Ok(p) => p, 51 | Err(e) => { 52 | return Err(e); 53 | } 54 | }; 55 | 56 | match packet.packet_type { 57 | NetworkPacketType::Ping => { 58 | println!("Responding to Ping packet from {}...", src_addr.to_string()); 59 | src_addr.set_port(LISTEN_PORT); 60 | let res_packet = NetworkPacket::create_pong_packet(&packet); 61 | socket.write(&src_addr, res_packet)?; 62 | } 63 | NetworkPacketType::Pong => { 64 | let curr_ping = packet.get_time_elapsed().as_millis(); 65 | ROOM_NET_DIAGNOSTICS 66 | .lock() 67 | .unwrap() 68 | .register_ping(curr_ping as u64); 69 | println!("Got Pong packet ({}): {}", src_addr.to_string(), curr_ping); 70 | 71 | let network_info = try_get_network_info()?; 72 | // Check which player sent the packet and update the ping 73 | let (player_index, _node) = 74 | match network_info 75 | .node_info_array 76 | .iter() 77 | .enumerate() 78 | .find(|(_i, n)| { 79 | RawIPv4Address(n.ipv4_address).to_socket_address(LISTEN_PORT) == src_addr 80 | }) { 81 | Some(v) => v, 82 | None => { 83 | return Err(std::io::Error::new( 84 | std::io::ErrorKind::NotFound, 85 | "Unable to identify sender address", 86 | )) 87 | } 88 | }; 89 | 90 | let player_net_info = &PLAYER_NET_STATS[player_index]; 91 | player_net_info.set_connected(true); 92 | player_net_info.delay.load_from(&packet.delay); 93 | player_net_info 94 | .framerate_config 95 | .load_from(&packet.framerate_config); 96 | player_net_info 97 | .net_diagnostics 98 | .lock() 99 | .unwrap() 100 | .register_ping(curr_ping as u64); 101 | } 102 | } 103 | 104 | Ok(()) 105 | } 106 | 107 | fn poll_sender(addr: &SocketAddr, socket: &UdpSocket) -> std::io::Result<()> { 108 | let network_info = try_get_network_info()?; 109 | let mut sent = false; 110 | for (i, node) in network_info.node_info_array.iter().enumerate() { 111 | if node.is_connected == 0 { 112 | PLAYER_NET_STATS[i].set_connected(false); 113 | continue; 114 | } 115 | let ping_addr = RawIPv4Address(node.ipv4_address).to_socket_address(LISTEN_PORT); 116 | if ping_addr.ip() == addr.ip() { 117 | continue; 118 | } 119 | let packet = NetworkPacket::create_ping_packet(); 120 | if let Err(e) = socket.write(&ping_addr, packet) { 121 | eprintln!("Error sending ping packet to {}: {}", ping_addr, e); 122 | continue; 123 | } 124 | sent = true; 125 | } 126 | match sent { 127 | true => Ok(()), 128 | false => { 129 | ROOM_NET_DIAGNOSTICS.lock().unwrap().reset(); 130 | Err(std::io::Error::new( 131 | std::io::ErrorKind::NotConnected, 132 | "No network nodes found", 133 | )) 134 | } 135 | } 136 | } 137 | 138 | fn network_loop(network_role: NetworkRole, thread_type: NetworkThreadType) { 139 | let port = match thread_type { 140 | NetworkThreadType::Listener => LISTEN_PORT, 141 | NetworkThreadType::Sender => SEND_PORT, 142 | }; 143 | let addr = get_network_address(port); 144 | let socket = UdpSocket::bind(addr).expect("Unable to bind to socket"); 145 | let mut buf = [0; 1024]; 146 | while get_network_role() == network_role { 147 | let poll_start_timestamp = Instant::now(); 148 | let r = match thread_type { 149 | NetworkThreadType::Listener => poll_listener(&socket, &mut buf), 150 | NetworkThreadType::Sender => poll_sender(&addr, &socket), 151 | }; 152 | if let Err(e) = r { 153 | eprintln!("Error in {:?} thread: {:?}", thread_type, e); 154 | } 155 | 156 | //limit the rate the sender thread sends out packets 157 | if thread_type == NetworkThreadType::Sender { 158 | let packet_interval = match ldn::is_in_game() { 159 | true => Duration::from_secs_f64(0.5), 160 | false => Duration::from_secs_f64(0.1), 161 | }; 162 | if poll_start_timestamp.elapsed() < packet_interval { 163 | thread::sleep(packet_interval - poll_start_timestamp.elapsed()); 164 | } 165 | } 166 | } 167 | for player_net_stat in PLAYER_NET_STATS.iter() { 168 | player_net_stat.set_connected(false); 169 | } 170 | } 171 | 172 | unsafe fn spawn_network_threads(network_role: NetworkRole) { 173 | let network_role_clone = network_role.clone(); 174 | thread::spawn(move || { 175 | skyline::nn::os::ChangeThreadPriority(skyline::nn::os::GetCurrentThread(), 5); 176 | network_loop(network_role, NetworkThreadType::Listener); 177 | println!( 178 | "Listener Network loop exited, with Network State: {:?}", 179 | get_network_state() 180 | ); 181 | skyline::nn::os::ChangeThreadPriority(skyline::nn::os::GetCurrentThread(), 24); 182 | }); 183 | thread::spawn(move || { 184 | skyline::nn::os::ChangeThreadPriority(skyline::nn::os::GetCurrentThread(), 5); 185 | network_loop(network_role_clone, NetworkThreadType::Sender); 186 | println!( 187 | "Sender Network loop exited, with Network State: {:?}", 188 | get_network_state() 189 | ); 190 | skyline::nn::os::ChangeThreadPriority(skyline::nn::os::GetCurrentThread(), 24); 191 | }); 192 | } 193 | 194 | #[skyline::hook(replace = create_network)] 195 | unsafe fn on_network_created(network_config: u64, security_config: u64, user_config: u64) { 196 | println!("Creating network..."); 197 | call_original!(network_config, security_config, user_config); 198 | spawn_network_threads(NetworkRole::Host); 199 | } 200 | 201 | #[skyline::hook(replace = connect_network)] 202 | unsafe fn on_network_connected( 203 | network_info: *mut NetworkInfo, 204 | security_config: u64, 205 | user_config: u64, 206 | local_comm_ver: i32, 207 | connect_option: u32, 208 | ) { 209 | println!("Connecting to network..."); 210 | call_original!( 211 | network_info, 212 | security_config, 213 | user_config, 214 | local_comm_ver, 215 | connect_option 216 | ); 217 | spawn_network_threads(NetworkRole::Client); 218 | } 219 | 220 | #[skyline::hook(replace = disconnect_network)] 221 | unsafe fn on_network_disconnected() { 222 | call_original!(); 223 | println!("Network Disconnected"); 224 | } 225 | 226 | #[skyline::hook(replace = destroy_network)] 227 | unsafe fn on_network_destroyed() { 228 | call_original!(); 229 | println!("Network Destroyed"); 230 | } 231 | 232 | pub fn get_player_net_info<'a>(player_index: usize) -> &'static PlayerNetInfo { 233 | &PLAYER_NET_STATS[player_index] 234 | } 235 | 236 | pub fn get_room_net_diag<'a>() -> std::sync::MutexGuard<'a, NetworkDiagnostics> { 237 | ROOM_NET_DIAGNOSTICS.lock().unwrap() 238 | } 239 | 240 | pub(super) fn install() { 241 | skyline::install_hooks!( 242 | on_network_scan, 243 | on_network_created, 244 | on_network_connected, 245 | on_network_disconnected, 246 | on_network_destroyed 247 | ); 248 | } 249 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | mod framerate; 2 | mod ldn; 3 | mod utils; 4 | 5 | use skyline::nn::ui2d::Pane; 6 | 7 | use utils::{PaneExt, TextBoxExt}; 8 | 9 | #[skyline::hook(offset = 0x1a12f60)] 10 | unsafe fn update_css(arg: u64) { 11 | if ldn::is_local_online() { 12 | ldn::latency_slider::poll(); 13 | framerate::poll(); 14 | let delay_str = ldn::latency_slider::current_input_delay().to_string(); 15 | let framerate_config = framerate::get_framerate_config(); 16 | let room_net_diag = ldn::net::get_room_net_diag(); 17 | let ping_str = match room_net_diag.get_avg_ping() { 18 | Some(ping) => format!(" {}ms", ping), 19 | None => String::from(""), 20 | }; 21 | let banner_display_str = format!( 22 | "Buffer: {} [{}]{}\0", 23 | delay_str, 24 | framerate_config.to_string(), 25 | ping_str 26 | ); 27 | let (r, g, b, a) = match room_net_diag.get_network_stability() { 28 | ldn::net::interface::NetworkStability::Stable => (0, 255, 0, 255), 29 | ldn::net::interface::NetworkStability::Inconsistent => (255, 255, 0, 255), 30 | ldn::net::interface::NetworkStability::Unstable => (255, 0, 0, 255), 31 | }; 32 | drop(room_net_diag); 33 | 34 | // pointer to p1's title text pane 35 | let p1_pane = (*((*((arg + 0xe58) as *const u64) + 0x10) as *const u64)) as *mut Pane; 36 | let p1_pane = &mut *p1_pane; 37 | p1_pane.as_textbox().set_default_material_colors(); 38 | p1_pane.as_textbox().set_color(r, g, b, a); 39 | p1_pane.as_textbox().set_text_string(&banner_display_str); 40 | 41 | let p1_pane_bg = p1_pane.parent().unwrap().traverse_backward(2).unwrap(); 42 | p1_pane_bg.set_visible(false); 43 | 44 | let p2_pane = p1_pane_bg 45 | .parent() 46 | .unwrap() 47 | .parent() 48 | .unwrap() 49 | .prev() 50 | .unwrap(); 51 | p2_pane.as_textbox().set_default_material_colors(); 52 | p2_pane.as_textbox().set_color(r, g, b, a); 53 | p2_pane.as_textbox().set_text_string(&banner_display_str); 54 | 55 | let panel_root = p2_pane.parent().unwrap().traverse_forward(4).unwrap(); 56 | 57 | for player_index in 0..8 { 58 | let player_panel_root = panel_root 59 | .get_child(&format!("set_panel_{}p", player_index + 1), false) 60 | .unwrap(); 61 | 62 | let player_panel = player_panel_root.children().unwrap(); 63 | 64 | let player_panel_name = player_panel 65 | .get_child(&format!("set_btn_panel"), false) 66 | .unwrap(); 67 | let player_panel_name = player_panel_name.children().unwrap().next().unwrap(); 68 | let player_panel_name = player_panel_name 69 | .get_child(&format!("set_txt_00"), true) 70 | .unwrap(); 71 | 72 | let player_net_info = ldn::net::get_player_net_info(player_index); 73 | match player_net_info.is_connected() { 74 | true => { 75 | let is_stick_pressed = ninput::any::is_press(ninput::Buttons::STICK_L) 76 | || ninput::any::is_press(ninput::Buttons::STICK_R); 77 | let is_triggers_pressed = ninput::any::is_press(ninput::Buttons::L) 78 | && ninput::any::is_press(ninput::Buttons::R); 79 | if is_stick_pressed || is_triggers_pressed { 80 | let avg_ping = match player_net_info 81 | .net_diagnostics 82 | .lock() 83 | .unwrap() 84 | .get_avg_ping() 85 | { 86 | Some(p) => format!("{}ms", p), 87 | None => String::from("???"), 88 | }; 89 | player_panel_name 90 | .as_textbox() 91 | .set_text_string(&format!("{}", avg_ping)); 92 | } else { 93 | player_panel_name.as_textbox().set_text_string(&format!( 94 | "{}, {}", 95 | player_net_info.framerate_config.to_string(), 96 | player_net_info.delay.to_string() 97 | )); 98 | } 99 | } 100 | false => { 101 | player_panel_name 102 | .as_textbox() 103 | .set_text_string(&format!("P{}", player_index + 1)); 104 | } 105 | } 106 | } 107 | } 108 | call_original!(arg); 109 | } 110 | 111 | #[skyline::main(name = "local-latency-slider")] 112 | pub fn main() { 113 | if !utils::is_yuzu_emulator() { 114 | skyline::error::show_error( 115 | 1, 116 | "Compatibility Error", 117 | "Local Latency Slider mod is currently only supported on yuzu emulator", 118 | ); 119 | return; 120 | } 121 | 122 | framerate::install(); 123 | ldn::install(); 124 | skyline::install_hook!(update_css); 125 | } 126 | -------------------------------------------------------------------------------- /src/utils/mod.rs: -------------------------------------------------------------------------------- 1 | use skyline::nn::os::Tick; 2 | use skyline::nn::ui2d::{Pane, TextBox}; 3 | use std::time::{Duration, Instant}; 4 | 5 | extern "C" { 6 | #[link_name = "\u{1}_ZN2nn2os22GetSystemTickFrequencyEv"] 7 | pub fn get_tick_freq() -> u64; 8 | } 9 | 10 | #[inline] 11 | pub fn duration_since_tick(tick: Tick) -> Duration { 12 | let elapsed_ticks = unsafe { skyline::nn::os::GetSystemTick() } - tick; 13 | Duration::from_secs_f64(elapsed_ticks as f64 / unsafe { get_tick_freq() } as f64) 14 | } 15 | 16 | pub fn is_yuzu_emulator() -> bool { 17 | unsafe { 18 | let base_address = skyline::hooks::getRegionAddress(skyline::hooks::Region::Text) as u64; 19 | return base_address == 0x80004000; 20 | } 21 | } 22 | 23 | pub fn poll_buttons(buttons: &[ninput::Buttons]) -> ninput::Buttons { 24 | static mut PRESS_COOLDOWN: Option = None; 25 | for button in buttons { 26 | let is_pressed = ninput::any::is_press(*button); 27 | unsafe { 28 | match (PRESS_COOLDOWN, is_pressed) { 29 | (Some(t), _) => { 30 | if t.elapsed().as_millis() > 167 { 31 | PRESS_COOLDOWN = None; 32 | } 33 | } 34 | (None, true) => { 35 | PRESS_COOLDOWN = Some(Instant::now()); 36 | return *button; 37 | } 38 | _ => PRESS_COOLDOWN = None, 39 | } 40 | } 41 | } 42 | return ninput::Buttons::empty(); 43 | } 44 | 45 | #[skyline::from_offset(0x37a1f10)] 46 | fn set_text_string(pane: *mut Pane, string: *const u8); 47 | 48 | #[skyline::from_offset(0x59970)] 49 | fn find_pane_by_name_recursive(pane: *const Pane, s: *const u8) -> *mut Pane; 50 | 51 | pub trait PaneExt { 52 | fn next(&self) -> Option<&mut Pane>; 53 | fn prev(&self) -> Option<&mut Pane>; 54 | fn parent(&self) -> Option<&mut Pane>; 55 | fn children(&self) -> Option<&mut Pane>; 56 | fn traverse_forward(&self, steps: usize) -> Option<&mut Pane>; 57 | fn traverse_backward(&self, steps: usize) -> Option<&mut Pane>; 58 | fn get_child(&self, name: &str, recursive: bool) -> Option<&mut Pane>; 59 | } 60 | 61 | impl PaneExt for Pane { 62 | fn next(&self) -> Option<&mut Pane> { 63 | unsafe { 64 | let node = self.link.next; 65 | let pane = ((node as *mut u64).sub(1)) as *mut Pane; 66 | match pane.is_null() 67 | || ((*pane).children_list.next.is_null() && (*pane).children_list.prev.is_null()) 68 | { 69 | true => None, 70 | false => Some(&mut *pane), 71 | } 72 | } 73 | } 74 | 75 | fn prev(&self) -> Option<&mut Pane> { 76 | unsafe { 77 | let node = self.link.prev; 78 | let pane = ((node as *mut u64).sub(1)) as *mut Pane; 79 | match pane.is_null() 80 | || ((*pane).children_list.next.is_null() && (*pane).children_list.prev.is_null()) 81 | { 82 | true => None, 83 | false => Some(&mut *pane), 84 | } 85 | } 86 | } 87 | 88 | fn parent(&self) -> Option<&mut Pane> { 89 | unsafe { 90 | let p = self.parent; 91 | match p.is_null() { 92 | true => None, 93 | false => Some(&mut *p), 94 | } 95 | } 96 | } 97 | 98 | fn children(&self) -> Option<&mut Pane> { 99 | unsafe { 100 | let node = self.children_list.next; 101 | let pane = ((node as *mut u64).sub(1)) as *mut Pane; 102 | match pane.is_null() 103 | || ((*pane).children_list.next.is_null() && (*pane).children_list.prev.is_null()) 104 | { 105 | true => None, 106 | false => Some(&mut *pane), 107 | } 108 | } 109 | } 110 | 111 | fn traverse_forward(&self, steps: usize) -> Option<&mut Pane> { 112 | let mut i = 0; 113 | let mut current = self.next(); 114 | while let Some(p) = current { 115 | i += 1; 116 | if i == steps { 117 | return Some(p); 118 | } 119 | current = p.next(); 120 | } 121 | return None; 122 | } 123 | 124 | fn traverse_backward(&self, steps: usize) -> Option<&mut Pane> { 125 | let mut i = 0; 126 | let mut current = self.prev(); 127 | while let Some(p) = current { 128 | i += 1; 129 | if i == steps { 130 | return Some(p); 131 | } 132 | current = p.prev(); 133 | } 134 | return None; 135 | } 136 | 137 | fn get_child(&self, name: &str, recursive: bool) -> Option<&mut Pane> { 138 | if recursive { 139 | let child = unsafe { 140 | find_pane_by_name_recursive(self as *const Pane, format!("{}\0", name).as_ptr()) 141 | }; 142 | match child.is_null() { 143 | true => return None, 144 | false => return unsafe { Some(&mut *child) }, 145 | } 146 | } 147 | 148 | let mut current = self.children(); 149 | while let Some(p) = current { 150 | if p.get_name() == name { 151 | return Some(p); 152 | } 153 | current = p.next(); 154 | } 155 | return None; 156 | } 157 | } 158 | 159 | pub trait TextBoxExt { 160 | fn set_text_string(&mut self, text: &str); 161 | } 162 | 163 | impl TextBoxExt for TextBox { 164 | fn set_text_string(&mut self, text: &str) { 165 | unsafe { 166 | set_text_string( 167 | self as *mut TextBox as *mut Pane, 168 | format!("{}\0", text).as_ptr(), 169 | ); 170 | } 171 | } 172 | } 173 | --------------------------------------------------------------------------------