source: binary-improvements/assembly-patcher/Main.cs@ 142

Last change on this file since 142 was 142, checked in by alloc, 10 years ago

Fixes: Fixed #49
File size: 5.6 KB
Line 
1using System;
2using System.Collections.Generic;
3using System.Reflection;
4using Mono.Cecil;
5using Mono.Cecil.Cil;
6
7namespace dtdfixer
8{
9 class MainClass
10 {
11 public static void Main (string[] args)
12 {
13 ModuleDefinition module = ModuleDefinition.ReadModule ("Assembly-CSharp.dll");
14
15 TypeDefinition type = module.GetType ("GameManager");
16 if (isPatched (type)) {
17 Console.WriteLine ("Assembly already patched");
18 return;
19 }
20 markTypePatched (module, type);
21
22 mappingPatch (module);
23 consoleOutputPatch (module);
24 telnetPatch (module);
25 connectLogPatch (module);
26 publicCommandPermissionsPatch (module);
27 playerDataPatch (module);
28
29 module.Write ("Assembly-CSharp.patched.dll");
30 Console.WriteLine ("Done");
31
32 }
33
34 private static void mappingPatch (ModuleDefinition module)
35 {
36 TypeDefinition type = module.GetType ("Chunk");
37 addHook (type, "CalcMapColors", true, 0, true, typeof(AllocsFixes.MapRendering.MapRendering).GetMethod ("RenderSingleChunk"));
38 }
39
40 private static void consoleOutputPatch (ModuleDefinition module)
41 {
42 TypeDefinition type = module.GetType ("ConsoleSdtd");
43 replaceMethod (type, "ExecuteCmdFromClient", true, 3, typeof(AllocsFixes.NetConnections.ConsoleOutputSeparator).GetMethod ("C_ExecuteCmdFromClient"));
44 addHook (type, "Run", true, 0, true, typeof(AllocsFixes.NetConnections.ConsoleOutputSeparator).GetMethod ("C_Run"));
45 replaceMethod (type, "SendResult", true, 1, typeof(AllocsFixes.NetConnections.ConsoleOutputSeparator).GetMethod ("C_SendResult"));
46 }
47
48 private static void playerDataPatch (ModuleDefinition module)
49 {
50 TypeDefinition type = module.GetType ("GameManager");
51 addHook (type, "SavePlayerData", true, 2, true, typeof(AllocsFixes.PlayerDataStuff).GetMethod ("GM_SavePlayerData"));
52 addHook (type, "Awake", true, 0, true, typeof(AllocsFixes.StateManager).GetMethod ("Awake"));
53 addHook (type, "Shutdown", true, 0, false, typeof(AllocsFixes.StateManager).GetMethod ("Shutdown"));
54 }
55
56 private static void publicCommandPermissionsPatch (ModuleDefinition module)
57 {
58 TypeDefinition type = module.GetType ("AdminTools");
59 replaceMethod (type, "GetAllowedCommandsList", true, 1, typeof(AllocsFixes.AdminToolsStuff).GetMethod ("GetAllowedCommandsList"));
60 }
61
62 private static void connectLogPatch (ModuleDefinition module)
63 {
64 TypeDefinition type = module.GetType ("GameManager");
65 addHook (type, "RequestToSpawnPlayer", true, 5, true, typeof(AllocsFixes.AllocsLogFunctions).GetMethod ("RequestToSpawnPlayer"));
66 }
67
68 private static void telnetPatch (ModuleDefinition module)
69 {
70 TypeDefinition type = module.GetType ("NetTelnetServer");
71 replaceMethod (type, ".ctor", false, 1, typeof(AllocsFixes.NetConnections.NetTelnetServer).GetMethod ("init"));
72 replaceMethod (type, "Disconnect", false, 0, typeof(AllocsFixes.NetConnections.NetTelnetServer).GetMethod ("Disconnect"));
73 replaceMethod (type, "SetConsole", false, 1, typeof(AllocsFixes.NetConnections.NetTelnetServer).GetMethod ("SetConsole"));
74 replaceMethod (type, "WriteToClient", false, 1, typeof(AllocsFixes.NetConnections.NetTelnetServer).GetMethod ("WriteToClient"));
75 }
76
77 private static void markTypePatched (ModuleDefinition module, TypeDefinition type)
78 {
79 type.Fields.Add (new FieldDefinition ("AllocsPatch", Mono.Cecil.FieldAttributes.Private | Mono.Cecil.FieldAttributes.SpecialName, module.Import (typeof(int))));
80 }
81
82 private static void addHook (TypeDefinition type, string methodName, bool addThisRef, int opCount, bool atEnd, MethodBase targetMethod)
83 {
84 foreach (MethodDefinition method in type.Methods) {
85 if (method.Name.Equals (methodName)) {
86 var il = method.Body.GetILProcessor ();
87 var call = il.Create (OpCodes.Call, method.Module.Import (targetMethod));
88 if (atEnd) {
89 int insBefore = method.Body.Instructions.Count;
90 if (addThisRef)
91 il.Append (il.Create (OpCodes.Ldarg, 0));
92 for (int op = 0; op < opCount; op++) {
93 il.Append (il.Create (OpCodes.Ldarg, op + 1));
94 }
95 il.Append (call);
96 il.Remove (method.Body.Instructions [insBefore - 1]);
97 il.Append (il.Create (OpCodes.Ret));
98 } else {
99 var i = 0;
100 if (addThisRef)
101 il.InsertBefore (method.Body.Instructions [i++], il.Create (OpCodes.Ldarg, 0));
102 for (int op = 0; op < opCount; op++) {
103 il.InsertBefore (method.Body.Instructions [i++], il.Create (OpCodes.Ldarg, op + 1));
104 }
105 il.InsertBefore (method.Body.Instructions [i++], call);
106 }
107 return;
108 }
109 }
110 Console.WriteLine ("ERROR: Did not find " + type.Name + "." + methodName + "()");
111 }
112
113 private static void replaceMethod (TypeDefinition type, string methodName, bool addThisRef, int opCount, MethodBase targetMethod)
114 {
115 foreach (MethodDefinition method in type.Methods) {
116 if (method.Name.Equals (methodName)) {
117 var il = method.Body.GetILProcessor ();
118 var call = il.Create (OpCodes.Call, method.Module.Import (targetMethod));
119 var i = 0;
120 if (addThisRef)
121 il.InsertBefore (method.Body.Instructions [i++], il.Create (OpCodes.Ldarg, 0));
122 for (int op = 0; op < opCount; op++) {
123 il.InsertBefore (method.Body.Instructions [i++], il.Create (OpCodes.Ldarg, op + 1));
124 }
125 il.InsertBefore (method.Body.Instructions [i++], call);
126 il.InsertBefore (method.Body.Instructions [i++], il.Create (OpCodes.Ret));
127 return;
128 }
129 }
130 Console.WriteLine ("ERROR: Did not find " + type.Name + "." + methodName + "()");
131 }
132
133 private static bool isPatched (TypeDefinition type)
134 {
135 foreach (FieldDefinition fd in type.Fields) {
136 if (fd.Name.Equals ("AllocsPatch")) {
137 return true;
138 }
139 }
140 return false;
141 }
142 }
143}
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