find-CBasePlayerController_SetPlayerName

Find CBasePlayerController_SetPlayerName

Locate CBasePlayerController_SetPlayerName in CS2 server.dll or server.so using IDA Pro MCP tools.

Method

1. Search for strings fov_desired and newname:

   mcp__ida-pro-mcp__find_regex pattern="fov_desired"
   mcp__ida-pro-mcp__find_regex pattern="newname"
   

2. Get cross-references to both strings:

   mcp__ida-pro-mcp__xrefs_to addrs=["<fov_desired_addr>", "<newname_addr>"]
   

3. Find the function that references both strings - this is the player info sync function.

4. Decompile that function and look for the call to CBasePlayerController_SetPlayerName:

   mcp__ida-pro-mcp__decompile addr="<function_addr>"
   

5. In the decompiled output, find the pattern:

   CBasePlayerController_SetPlayerName(a2, v6);  // after name comparison and event firing
   

6. Rename if needed:

   mcp__ida-pro-mcp__rename batch={"func": [{"addr": "<target_addr>", "name": "CBasePlayerController_SetPlayerName"}]}
   

7. Get function details for YAML:

   mcp__ida-pro-mcp__lookup_funcs queries="<target_addr>"
   

8. Generate and validate unique signature:

   ALWAYS Use SKILL /generate-signature-for-function to generate a robust and unique signature for the function.

9. Write IDA analysis output as YAML beside the binary:

   ALWAYS Use SKILL /write-func-as-yaml to write the analysis results.

   Required parameters:

   • func_name: CBasePlayerController_SetPlayerName
   • func_addr: The function address from step 7
   • func_sig: The validated signature from step 8

   Note: This is NOT a virtual function, so no vtable parameters are needed.

Signature Pattern

The function is called after:

• Creating CMsgPlayerInfo message
• Firing player_changename event with userid, oldname, newname fields
• Comparing old and new player names

The surrounding function also handles fov_desired cvar (clamps FOV between 1-135).

Function Characteristics

• Type: Regular member function (NOT virtual)
• Parameters: (CBasePlayerController* this, const char* name)
• Behavior:
  • Copies player name to this + 0x510 using V_strncpy with max length 128
  • Calls network state change notification

Hex Signature

Final signature: 41 B8 80 00 00 00 48 8D 99 10 05 00 00

Output YAML Format

The output YAML filename depends on the platform:

• server.dll → CBasePlayerController_SetPlayerName.windows.yaml
• server.so → CBasePlayerController_SetPlayerName.linux.yaml

func_va: 0x180A8CA10   # Virtual address of the function - This can change when game updates.
func_rva: 0xA8CA10     # Relative virtual address (VA - image base) - This can change when game updates.
func_size: 0x3F        # Function size in bytes - This can change when game updates.
func_sig: 41 B8 80 00 00 00 48 8D 99 10 05 00 00  # Unique byte signature for pattern scanning.

Note: This is NOT a virtual function, so there are no vfunc_* fields.