Horizon: Implement arp:r and arp:w services (#5802)

* Horizon: Implement arp:r and arp:w services

* Fix formatting

* Remove HLE arp services

* Revert "Remove HLE arp services"

This reverts commit c576fcccadb963db56b96bacabd1c1ac7abfb1ab.

* Keep LibHac impl since it's used in bcat

* Addresses gdkchan's feedback

* ArpApi in PrepoIpcServer and remove LmApi

* Fix 2

* Fixes ArpApi init

* Fix encoding

* Update PrepoService.cs

* Fix prepo

1 files changed, 6 insertions, 0 deletions

diff --git a/src/Ryujinx.Horizon/ServiceTable.cs b/src/Ryujinx.Horizon/ServiceTable.cs
index c79328a9..ee62ee84 100644
--- a/src/Ryujinx.Horizon/ServiceTable.cs
+++ b/src/Ryujinx.Horizon/ServiceTable.cs
@@ -1,3 +1,4 @@
+using Ryujinx.Horizon.Arp;
 using Ryujinx.Horizon.Bcat;
 using Ryujinx.Horizon.Hshl;
 using Ryujinx.Horizon.Ins;
@@ -8,6 +9,7 @@ using Ryujinx.Horizon.Ngc;
 using Ryujinx.Horizon.Ovln;
 using Ryujinx.Horizon.Prepo;
 using Ryujinx.Horizon.Psc;
+using Ryujinx.Horizon.Sdk.Arp;
 using Ryujinx.Horizon.Srepo;
 using Ryujinx.Horizon.Usb;
 using Ryujinx.Horizon.Wlan;
@@ -23,6 +25,9 @@ namespace Ryujinx.Horizon
 
         private readonly ManualResetEvent _servicesReadyEvent = new(false);
 
+        public IReader ArpReader { get; internal set; }
+        public IWriter ArpWriter { get; internal set; }
+
         public IEnumerable<ServiceEntry> GetServices(HorizonOptions options)
         {
             List<ServiceEntry> entries = new();
@@ -32,6 +37,7 @@ namespace Ryujinx.Horizon
                 entries.Add(new ServiceEntry(T.Main, this, options));
             }
 
+            RegisterService<ArpMain>();
             RegisterService<BcatMain>();
             RegisterService<HshlMain>();
             RegisterService<InsMain>();