find-CBaseEntity_SetStateChanged

CBaseEntity_SetStateChanged Function Location Workflow

Overview

Locate the CBaseEntity::SetStateChanged virtual function in CS2 server binary. This function handles network state change notifications and is called when entity properties are modified and need to be synchronized across the network.

Location Steps

1. Search for Signature String

Use find_regex to search for the CNetworkTransmitComponent::StateChanged string:

mcp__ida-pro-mcp__find_regex(pattern="CNetworkTransmitComponent::StateChanged\\(%s\\)")

Expected result: Find string address containing CNetworkTransmitComponent::StateChanged(%s) @%s:%d

2. Find Cross-References

Use xrefs_to to find locations that reference this string:

mcp__ida-pro-mcp__xrefs_to(addrs="<string_addr>")

Expected result: Find the function that references the string

3. Rename Function

Use rename to give the function a meaningful name:

mcp__ida-pro-mcp__rename(batch={"func": {"addr": "<function_addr>", "name": "CBaseEntity_SetStateChanged"}})

4. Find VTable Index for CBaseEntity_SetStateChanged

ALWAYS Use SKILL /get-vtable-index to get vtable offset and index for the function CBaseEntity_SetStateChanged.

VTable class name: CBaseEntity

5. Generate and Validate Unique Signature for CBaseEntity_SetStateChanged

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

7. Write IDA Analysis Output as YAML

ALWAYS Use SKILL /write-vfunc-as-yaml to write the analysis results for CBaseEntity_SetStateChanged.

Required parameters:

• func_name: CBaseEntity_SetStateChanged
• func_addr: The function address from step 2
• func_sig: The validated signature from step 6

VTable parameters:

• vtable_name: CBaseEntity
• vfunc_offset: The offset from step 5
• vfunc_index: The index from step 5

Function Characteristics

The CBaseEntity::SetStateChanged function contains the following signature string:

• CNetworkTransmitComponent::StateChanged(%s) @%s:%d - Debug logging for state changes

Function Behavior

1. If the first parameter's DWORD value is non-zero, calls a sub-function with adjusted this pointer
2. Otherwise, checks entity flags and logs state change information
3. Updates internal state tracking fields

VTable Information

• VTable Name: CBaseEntity
• VTable Mangled Name:
  • Windows: ??_7CBaseEntity@@6B@
  • Linux: _ZTV11CBaseEntity
• VTable Offset: 0xD8 (may change with game updates)
• VTable Index: 27 (may change with game updates)

Output YAML Format

The output YAML filename depends on the platform:

• server.dll → CBaseEntity_SetStateChanged.windows.yaml
• server.so / libserver.so → CBaseEntity_SetStateChanged.linux.yaml

func_va: 0x180168DC0     # Virtual address - changes with game updates
func_rva: 0x168DC0       # Relative virtual address (VA - image base) - changes with game updates
func_size: 0x142         # Function size in bytes - changes with game updates
func_sig: 48 8B C4 56 48 81 EC 40 01 00 00 83 3A 00 48 8B F1 48 89 68 10 48 8B EA 48 89 78 18 74 ?? 4C 8B C2 48 8B D1 48 83 C1 40 E8 ?? ?? ?? ??
vtable_name: CBaseEntity
vfunc_offset: 0xD8       # Offset from vtable start - changes with game updates
vfunc_index: 27          # vtable index - changes with game updates

Related Functions

• CNetworkTransmitComponent::StateChanged - Internal state change handler
• NetworkStateChanged - Higher-level network state notification