diff --git a/lib/common b/lib/common
index 1c4d306..30c34ca 160000
--- a/lib/common
+++ b/lib/common
@@ -1 +1 @@
-Subproject commit 1c4d306a7fea3cb1ea0a3226da78fcf01324e498
+Subproject commit 30c34ca015c860fb156b79ca26938b7251db2ce0
diff --git a/src/net/grunt/ClientLink.cpp b/src/net/grunt/ClientLink.cpp
index 6c2d94d..2a58ce1 100644
--- a/src/net/grunt/ClientLink.cpp
+++ b/src/net/grunt/ClientLink.cpp
@@ -1,11 +1,21 @@
 #include "net/grunt/ClientLink.hpp"
 #include "net/connection/WowConnection.hpp"
 #include "net/grunt/ClientResponse.hpp"
+#include "net/grunt/Command.hpp"
 #include <new>
-#include <common/DataStore.hpp>
 #include <storm/Memory.hpp>
 #include <storm/String.hpp>
 
+Grunt::Command<Grunt::ClientLink> Grunt::s_clientCommands[] = {
+    { Grunt::ClientLink::CMD_AUTH_LOGON_CHALLENGE, "ClientLink::CMD_AUTH_LOGON_CHALLENGE", &Grunt::ClientLink::CmdAuthLogonChallenge, 0 },
+    { Grunt::ClientLink::CMD_AUTH_LOGON_PROOF, "ClientLink::CMD_AUTH_LOGON_PROOF", &Grunt::ClientLink::CmdAuthLogonProof, 0 },
+    { Grunt::ClientLink::CMD_AUTH_RECONNECT_CHALLENGE, "ClientLink::CMD_AUTH_RECONNECT_CHALLENGE", &Grunt::ClientLink::CmdAuthReconnectChallenge, 0 },
+    { Grunt::ClientLink::CMD_AUTH_RECONNECT_PROOF, "ClientLink::CMD_AUTH_RECONNECT_PROOF", &Grunt::ClientLink::CmdAuthReconnectProof, 0 },
+    { Grunt::ClientLink::CMD_REALM_LIST, "ClientLink::CMD_REALM_LIST", &Grunt::ClientLink::CmdRealmList, 0 },
+    { Grunt::ClientLink::CMD_XFER_INITIATE, "ClientLink::CMD_XFER_INITIATE", &Grunt::ClientLink::CmdXferInitiate, 0 },
+    { Grunt::ClientLink::CMD_XFER_DATA, "ClientLink::CMD_XFER_DATA", &Grunt::ClientLink::CmdXferData, 0 },
+};
+
 Grunt::ClientLink::ClientLink(Grunt::ClientResponse& clientResponse) {
     // TODO
 
@@ -34,6 +44,41 @@ void Grunt::ClientLink::Call() {
     this->m_critSect.Leave();
 }
 
+int32_t Grunt::ClientLink::CmdAuthLogonChallenge(CDataStore& msg) {
+    // TODO
+    return 0;
+}
+
+int32_t Grunt::ClientLink::CmdAuthLogonProof(CDataStore& msg) {
+    // TODO
+    return 0;
+}
+
+int32_t Grunt::ClientLink::CmdAuthReconnectChallenge(CDataStore& msg) {
+    // TODO
+    return 0;
+}
+
+int32_t Grunt::ClientLink::CmdAuthReconnectProof(CDataStore& msg) {
+    // TODO
+    return 0;
+}
+
+int32_t Grunt::ClientLink::CmdRealmList(CDataStore& msg) {
+    // TODO
+    return 0;
+}
+
+int32_t Grunt::ClientLink::CmdXferData(CDataStore& msg) {
+    // TODO
+    return 0;
+}
+
+int32_t Grunt::ClientLink::CmdXferInitiate(CDataStore& msg) {
+    // TODO
+    return 0;
+}
+
 void Grunt::ClientLink::Connect(const char* a2) {
     if (this->m_state) {
         return;
@@ -163,3 +208,23 @@ void Grunt::ClientLink::WCConnected(WowConnection* conn, WowConnection* inbound,
         this->Disconnect();
     }
 }
+
+void Grunt::ClientLink::WCDataReady(WowConnection* conn, uint32_t timeStamp, uint8_t* data, int32_t len) {
+    this->m_datastore1B0.PutArray(data, len);
+    this->m_datastore1B0.Finalize();
+
+    uint32_t pos = 0;
+    if (Grunt::Command<Grunt::ClientLink>::Process(this->m_datastore1B0, Grunt::s_clientCommands, 7u, *this, pos)) {
+        auto remainingBytes = this->m_datastore1B0.m_size - pos;
+        this->m_datastore1B0.m_read = pos;
+        void* remainingData;
+        this->m_datastore1B0.GetDataInSitu(remainingData, remainingBytes);
+        this->m_datastore1B0.m_read = -1;
+        this->m_datastore1B0.Reset();
+        this->m_datastore1B0.PutData(remainingData, remainingBytes);
+    } else {
+        this->m_datastore1B0.m_read = -1;
+        this->m_datastore1B0.Reset();
+        this->Disconnect();
+    }
+}
diff --git a/src/net/grunt/ClientLink.hpp b/src/net/grunt/ClientLink.hpp
index c405e0d..2717c53 100644
--- a/src/net/grunt/ClientLink.hpp
+++ b/src/net/grunt/ClientLink.hpp
@@ -7,14 +7,24 @@
 #include "net/grunt/Timer.hpp"
 #include "net/srp/SRP6_Client.hpp"
 #include "net/Types.hpp"
+#include <common/DataStore.hpp>
 #include <storm/Thread.hpp>
 
-class CDataStore;
 class WowConnection;
 
 class Grunt::ClientLink : public WowConnectionResponse, Grunt::Pending, Grunt::Timer::Event {
     public:
         // Types
+        enum COMMAND {
+            CMD_AUTH_LOGON_CHALLENGE        = 0,
+            CMD_AUTH_LOGON_PROOF            = 1,
+            CMD_AUTH_RECONNECT_CHALLENGE    = 2,
+            CMD_AUTH_RECONNECT_PROOF        = 3,
+            CMD_REALM_LIST                  = 16,
+            CMD_XFER_INITIATE               = 48,
+            CMD_XFER_DATA                   = 49,
+        };
+
         struct Logon {
             const char* accountName;
             const char* password;
@@ -34,6 +44,7 @@ class Grunt::ClientLink : public WowConnectionResponse, Grunt::Pending, Grunt::T
         int32_t m_state;
         SRP6_Client m_srpClient;
         SCritSect m_critSect;
+        CDataStore m_datastore1B0;
         WowConnection* m_connection = nullptr;
         ClientResponse* m_clientResponse;
         char m_accountName[1280];
@@ -41,10 +52,18 @@ class Grunt::ClientLink : public WowConnectionResponse, Grunt::Pending, Grunt::T
         // Virtual member functions
         virtual void WCConnected(WowConnection* conn, WowConnection* inbound, uint32_t timeStamp, const NETCONNADDR* addr);
         virtual void WCCantConnect(WowConnection* conn, uint32_t timeStamp, NETCONNADDR* addr);
+        virtual void WCDataReady(WowConnection* conn, uint32_t timeStamp, uint8_t* data, int32_t len);
         virtual void Call();
 
         // Member functions
         ClientLink(Grunt::ClientResponse& clientResponse);
+        int32_t CmdAuthLogonChallenge(CDataStore& msg);
+        int32_t CmdAuthLogonProof(CDataStore& msg);
+        int32_t CmdAuthReconnectChallenge(CDataStore& msg);
+        int32_t CmdAuthReconnectProof(CDataStore& msg);
+        int32_t CmdRealmList(CDataStore& msg);
+        int32_t CmdXferData(CDataStore& msg);
+        int32_t CmdXferInitiate(CDataStore& msg);
         void Connect(const char* a2);
         void Disconnect();
         void LogonNewSession(const Logon& logon);
diff --git a/src/net/grunt/Command.hpp b/src/net/grunt/Command.hpp
new file mode 100644
index 0000000..e07ad0d
--- /dev/null
+++ b/src/net/grunt/Command.hpp
@@ -0,0 +1,45 @@
+#ifndef NET_GRUNT_COMMAND_HPP
+#define NET_GRUNT_COMMAND_HPP
+
+#include "net/Grunt.hpp"
+
+template <class T>
+class Grunt::Command {
+    public:
+    // Static members
+    static int32_t Process(CDataStore& msg, Command<T>* commands, uint32_t commandCount, T& a4, uint32_t& pos);
+
+    // Member variables
+    int32_t cmd;
+    const char* name;
+    int32_t (T::*callback)(CDataStore& msg);
+    uint32_t unk;
+};
+
+template <class T>
+int32_t Grunt::Command<T>::Process(CDataStore& msg, Command<T>* commands, uint32_t commandCount, T& a4, uint32_t& pos) {
+    uint8_t cmd;
+    msg.Get(cmd);
+
+    for (uint32_t i = 0; i < commandCount; i++) {
+        auto& command = commands[i];
+
+        if (command.cmd == cmd) {
+            auto callback = command.callback;
+            auto result = (a4.*callback)(msg);
+
+            if (result == 0) {
+                return 1;
+            } else {
+                // TODO
+                return 0;
+            }
+        }
+    }
+
+    // TODO
+
+    return 0;
+}
+
+#endif
diff --git a/src/net/grunt/Grunt.hpp b/src/net/grunt/Grunt.hpp
index f78b013..8c0dc77 100644
--- a/src/net/grunt/Grunt.hpp
+++ b/src/net/grunt/Grunt.hpp
@@ -4,8 +4,12 @@
 namespace Grunt {
     class ClientLink;
     class ClientResponse;
+    template <class>
+    class Command;
     class Pending;
     class Timer;
+
+    extern Command<ClientLink> s_clientCommands[];
 }
 
 #endif