through sub_800A678

include/link.h

@@ -2,6 +2,7 @@
 #define GUARD_LINK_H
 
 #define MAX_LINK_PLAYERS 4
+#define MAX_RFU_PLAYERS 5
 #define CMD_LENGTH 8
 #define QUEUE_CAPACITY 50
 #define BLOCK_BUFFER_SIZE 0x100
@@ -26,6 +27,18 @@
 #define EXTRACT_RECEIVED_NOTHING(status) \
 (((status) >> LINK_STAT_RECEIVED_NOTHING_SHIFT) & 1)
 
+struct LinkStatus
+{
+    u32 localId:2;
+    u32 playerCount:3;
+    u32 master:1;
+    u32 connEstablished:1;
+    u32 unused_7:1;
+    u32 receivedNothing:1;
+    u32 unused_9:7;
+    u32 errors:7;
+};
+
 #define MASTER_HANDSHAKE 0x8FFF
 #define SLAVE_HANDSHAKE  0xB9A0
 
@@ -138,7 +151,7 @@ extern u8 gUnknown_020228C4[BLOCK_BUFFER_SIZE]; // gBlockSendBuffer
 extern u8 gBlockSendBuffer[BLOCK_BUFFER_SIZE];
 extern u16 gLinkType;
 extern u32 gLinkStatus;
-extern u16 gBlockRecvBuffer[MAX_LINK_PLAYERS + 1][BLOCK_BUFFER_SIZE / 2];
+extern u16 gBlockRecvBuffer[MAX_RFU_PLAYERS][BLOCK_BUFFER_SIZE / 2];
 extern u16 gSendCmd[CMD_LENGTH];
 extern u8 gShouldAdvanceLinkState;
 extern struct LinkPlayer gLinkPlayers[];

include/link_rfu.h

@@ -9,16 +9,17 @@
 u32 sub_800BEC0(void);
 void sub_800E700(void);
 void sub_800EDD4(void);
+void sub_800F6FC(u8 who);
+void sub_800F728(u8 who);
 bool32 sub_800F7E4(void);
 void sub_800F804(void);
 void sub_800F850(void);
+u8 sub_800FCD8(void);
+bool32 sub_800FE84(const void *src, size_t size);
 void Rfu_set_zero(void);
 u8 sub_80104F4(void);
 u8 rfu_get_multiplayer_id(void);
-bool32 sub_800FE84(const void *src, size_t size);
 bool8 sub_8010100(u8 a0);
 bool8 sub_8010500(void);
-u8 sub_800FCD8(void);
-void sub_800F6FC(u8 who);
 
 #endif //GUARD_LINK_RFU_H