Add inventory modification packet

The size isn't quite right yet, but whatever.

resources/opcodes.json

@@ -256,6 +256,11 @@
             "name": "Unk19",
             "opcode": 379,
             "size": 16
+        },
+        {
+            "name": "InventoryModify",
+            "opcode": 318,
+            "size": 112
         }
     ],
     "ServerLobbyIpcType": [

src/bin/kawari-world.rs

@@ -813,6 +813,9 @@ async fn client_loop(
                                     ClientZoneIpcData::Unk19 { .. } => {
                                         tracing::info!("Recieved Unk19!");
                                     }
+                                    ClientZoneIpcData::InventoryModify(action) => {
+                                        tracing::info!("Client is modifying inventory! {action:#?}");
+                                    }
                                 }
                             }
                             SegmentType::KeepAlive { id, timestamp } => {

src/world/ipc/inventory_modify.rs

@@ -0,0 +1,53 @@
+use binrw::binrw;
+
+#[binrw]
+#[derive(Debug, Clone, Default)]
+pub struct InventoryModify {
+    context_id: u32,
+    operation_type: u8,
+    #[brw(pad_before = 3)]
+    src_actor_id: u32,
+    src_storage_id: u32,
+    src_container_index: i16,
+    #[brw(pad_before = 4)]
+    src_stack: u32,
+    src_catalog_id: u32,
+    dst_actor_id: u32,
+    dst_storage_id: u32,
+    dst_container_index: i16,
+    #[brw(pad_before = 2)]
+    dst_stack: u32,
+    dst_catalog_id: u32,
+}
+
+#[cfg(test)]
+mod tests {
+    use std::{fs::read, io::Cursor, path::PathBuf};
+
+    use binrw::BinRead;
+
+    use super::*;
+
+    #[test]
+    fn read_inventory_modify() {
+        let mut d = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+        d.push("resources/tests/inventory_modify.bin");
+
+        let buffer = read(d).unwrap();
+        let mut buffer = Cursor::new(&buffer);
+
+        let modify_inventory = InventoryModify::read_le(&mut buffer).unwrap();
+        assert_eq!(modify_inventory.context_id, 0x10000002);
+        assert_eq!(modify_inventory.operation_type, 70);
+        assert_eq!(modify_inventory.src_actor_id, 0);
+        assert_eq!(modify_inventory.src_storage_id, 1000);
+        assert_eq!(modify_inventory.src_container_index, 4);
+        assert_eq!(modify_inventory.src_stack, 0);
+        assert_eq!(modify_inventory.src_catalog_id, 0);
+        assert_eq!(modify_inventory.dst_actor_id, 209911808);
+        assert_eq!(modify_inventory.dst_storage_id, 0);
+        assert_eq!(modify_inventory.dst_container_index, 96);
+        assert_eq!(modify_inventory.dst_stack, 0);
+        assert_eq!(modify_inventory.dst_catalog_id, 4194304);
+    }
+}

src/world/ipc/mod.rs

@@ -68,6 +68,9 @@ pub use actor_move::ActorMove;
 mod actor_set_pos;
 pub use actor_set_pos::ActorSetPos;
 
+mod inventory_modify;
+pub use inventory_modify::InventoryModify;
+
 use crate::common::Position;
 use crate::common::read_string;
 use crate::common::write_string;
@@ -334,6 +337,8 @@ pub enum ClientZoneIpcData {
     Unk19 {
         unk: [u8; 16], // TODO: unknown
     },
+    #[br(pre_assert(*magic == ClientZoneIpcType::InventoryModify))]
+    InventoryModify(InventoryModify),
 }
 
 #[cfg(test)]