1 files changed, 198 insertions, 0 deletions
diff --git a/include/link.h b/include/link.h
new file mode 100644
index 000000000..1f91ebfeb
--- /dev/null
+++ b/include/link.h
@@ -0,0 +1,198 @@
+#ifndef GUARD_LINK_H
+#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
+
+#define LINK_STAT_LOCAL_ID               0x00000003
+#define LINK_STAT_PLAYER_COUNT           0x0000001C
+#define LINK_STAT_PLAYER_COUNT_SHIFT     2
+#define LINK_STAT_MASTER                 0x00000020
+#define LINK_STAT_MASTER_SHIFT           5
+#define LINK_STAT_CONN_ESTABLISHED       0x00000040
+#define LINK_STAT_CONN_ESTABLISHED_SHIFT 6
+#define LINK_STAT_RECEIVED_NOTHING       0x00000100
+#define LINK_STAT_RECEIVED_NOTHING_SHIFT 8
+#define LINK_STAT_ERRORS                 0x0007F000
+
+#define EXTRACT_PLAYER_COUNT(status) \
+(((status) & LINK_STAT_PLAYER_COUNT) >> LINK_STAT_PLAYER_COUNT_SHIFT)
+#define EXTRACT_MASTER(status) \
+(((status) >> LINK_STAT_MASTER_SHIFT) & 1)
+#define EXTRACT_CONN_ESTABLISHED(status) \
+(((status) >> LINK_STAT_CONN_ESTABLISHED_SHIFT) & 1)
+#define EXTRACT_RECEIVED_NOTHING(status) \
+(((status) >> LINK_STAT_RECEIVED_NOTHING_SHIFT) & 1)
+
+#define MASTER_HANDSHAKE 0x8FFF
+#define SLAVE_HANDSHAKE  0xB9A0
+
+enum
+{
+    LINK_STATE_START0,
+    LINK_STATE_START1,
+    LINK_STATE_HANDSHAKE,
+    LINK_STATE_INIT_TIMER,
+    LINK_STATE_CONN_ESTABLISHED,
+};
+
+enum
+{
+    EXCHANGE_NOT_STARTED,
+    EXCHANGE_COMPLETE,
+    EXCHANGE_TIMED_OUT,
+    EXCHANGE_IN_PROGRESS,
+};
+
+enum
+{
+    QUEUE_FULL_NONE,
+    QUEUE_FULL_SEND,
+    QUEUE_FULL_RECV,
+};
+
+enum
+{
+    LAG_NONE,
+    LAG_MASTER,
+    LAG_SLAVE,
+};
+
+struct LinkPlayer
+{
+    /* 0x00 */ u16 version;
+    /* 0x02 */ u16 lp_field_2;
+    /* 0x04 */ u32 trainerId;
+    /* 0x08 */ u8 name[11];
+    /* 0x13 */ u8 gender;
+    /* 0x14 */ u32 linkType;
+    /* 0x18 */ u16 lp_field_18; // battle bank in battles
+    /* 0x1A */ u16 language;
+};
+
+struct LinkPlayerBlock
+{
+    u8 magic1[16];
+    struct LinkPlayer linkPlayer;
+    u8 magic2[16];
+};
+
+// circular queues
+
+struct SendQueue
+{
+    u16 data[CMD_LENGTH][QUEUE_CAPACITY];
+    u8 pos;
+    u8 count;
+};
+
+struct RecvQueue
+{
+    u16 data[MAX_LINK_PLAYERS][CMD_LENGTH][QUEUE_CAPACITY];
+    u8 pos;
+    u8 count;
+};
+
+struct Link
+{
+    u8 isMaster; // 0: slave, 8: master
+    u8 state;
+    u8 localId; // local multi-player ID
+    u8 playerCount;
+    u16 tempRecvBuffer[4];
+    bool8 receivedNothing;
+    s8 serialIntrCounter;
+    bool8 handshakeAsMaster;
+    u8 link_field_F;
+
+    // error conditions
+    bool8 hardwareError; // hardware reported an error
+    bool8 badChecksum; // checksum didn't match between devices
+    u8 queueFull; // send or recv queue out of space
+    u8 lag; // connection is lagging
+
+    u16 checksum;
+
+    u8 sendCmdIndex;
+    u8 recvCmdIndex;
+
+    struct SendQueue sendQueue;
+    struct RecvQueue recvQueue;
+};
+
+struct BlockRequest
+{
+    void * address;
+    u32 size;
+};
+
+extern const struct BlockRequest sBlockRequestLookupTable[5];
+
+extern struct Link gLink;
+extern u16 gRecvCmds[MAX_RFU_PLAYERS][CMD_LENGTH];
+extern u8 gBlockSendBuffer[BLOCK_BUFFER_SIZE];
+extern u16 gLinkType;
+extern u32 gLinkStatus;
+extern u16 gBlockRecvBuffer[MAX_LINK_PLAYERS][BLOCK_BUFFER_SIZE / 2];
+extern u16 gSendCmd[CMD_LENGTH];
+extern u8 gShouldAdvanceLinkState;
+extern struct LinkPlayer gLinkPlayers[];
+extern u16 word_3002910[];
+extern bool8 gReceivedRemoteLinkPlayers;
+extern bool8 gLinkVSyncDisabled;
+
+void Task_DestroySelf(u8);
+void OpenLink(void);
+void CloseLink(void);
+u16 LinkMain2(u16 *);
+void sub_8007B14(void);
+bool32 sub_8007B24(void);
+void ClearLinkCallback(void);
+void ClearLinkCallback_2(void);
+u8 GetLinkPlayerCount(void);
+void OpenLinkTimed(void);
+u8 GetLinkPlayerDataExchangeStatusTimed(void);
+bool8 IsLinkPlayerDataExchangeComplete(void);
+u32 GetLinkPlayerTrainerId(u8);
+void ResetLinkPlayers(void);
+void sub_8007E24(void);
+void sub_8007E4C(void);
+u8 GetMultiplayerId(void);
+u8 bitmask_all_link_players_but_self(void);
+bool8 SendBlock(u8, void *, u16);
+u8 GetBlockReceivedStatus(void);
+void ResetBlockReceivedFlags(void);
+void ResetBlockReceivedFlag(u8);
+void SetLinkDebugValues(u32, u32);
+u8 GetLinkPlayerCount_2(void);
+bool8 IsLinkMaster(void);
+void CB2_LinkError(void);
+u8 GetSioMultiSI(void);
+bool8 IsLinkConnectionEstablished(void);
+void SetSuppressLinkErrorMessage(bool8);
+bool8 HasLinkErrorOccurred(void);
+void ResetSerial(void);
+u32 LinkMain1(u8 *, u16 *, u16[CMD_LENGTH][MAX_LINK_PLAYERS]);
+void RFUVSync(void);
+void Timer3Intr(void);
+void SerialCB(void);
+u8 GetLinkPlayerCount(void);
+bool32 InUnionRoom(void);
+
+void sub_800E0E8(void);
+bool8 sub_800A520(void);
+bool8 sub_8010500(void);
+void sub_800DFB4(u8, u8);
+void sub_800ADF8(void);
+void sub_800B488(void);
+void sub_8009734(void);
+void sub_800A620(void);
+void sub_8011BD0(void);
+u8 sub_800ABAC(void);
+u8 sub_800ABBC(void);
+void sub_800AC34(void);
+
+#endif // GUARD_LINK_H