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🚗 Custom Drivers for Anti-Cheat Bypass

📋 Table of Contents

  1. Graphics Driver Bypass
  2. Input Driver Interception
  3. Network Driver Bypass
  4. Implementation Details
  5. Security Considerations

🎨 Graphics Driver Bypass

Concept Overview

Graphics driver bypass involves intercepting and modifying graphics operations at the driver level to capture screen content that anti-cheat systems try to protect. This technique allows us to:

  • Capture framebuffer data directly from GPU memory
  • Bypass anti-screenshot mechanisms
  • Intercept OpenGL/DirectX calls
  • Modify rendering pipeline

Technical Architecture

Application Layer
        │
        ▼
    Graphics API (OpenGL/DirectX)
        │
        ▼
    Graphics Driver ←─── Our Custom Driver
        │
        ▼
    GPU Hardware

Implementation Details

1. OpenGL Driver Bypass

// opengl_bypass.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/drm/drm.h>
#include <linux/drm/drm_drv.h>
#include <linux/drm/drm_gem.h>
#include <linux/drm/drm_framebuffer.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Tibia Bot Developer");
MODULE_DESCRIPTION("OpenGL Driver Bypass for Anti-Cheat");

// OpenGL function pointers
typedef void (*glSwapBuffers_t)(void);
typedef void (*glReadPixels_t)(GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, GLvoid*);
typedef void (*glBindFramebuffer_t)(GLenum, GLuint);

static glSwapBuffers_t original_glSwapBuffers = NULL;
static glReadPixels_t original_glReadPixels = NULL;
static glBindFramebuffer_t original_glBindFramebuffer = NULL;

// Framebuffer capture structure
struct framebuffer_capture {
    unsigned char *data;
    int width;
    int height;
    int format;
    size_t size;
    bool is_captured;
};

static struct framebuffer_capture fb_capture = {0};

// Hooked OpenGL functions
void hooked_glSwapBuffers(void) {
    // Capture framebuffer before swap
    if (fb_capture.is_captured) {
        // Read current framebuffer
        glReadPixels(0, 0, fb_capture.width, fb_capture.height,
                    GL_RGBA, GL_UNSIGNED_BYTE, fb_capture.data);
        
        printk(KERN_INFO "OPENGL: Framebuffer captured (%dx%d)\n", 
               fb_capture.width, fb_capture.height);
    }
    
    // Call original function
    original_glSwapBuffers();
}

void hooked_glReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
                        GLenum format, GLenum type, GLvoid *pixels) {
    // Intercept read operations
    printk(KERN_INFO "OPENGL: glReadPixels called (%dx%d)\n", width, height);
    
    // Check if this is an anti-cheat read
    if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) {
        // Modify data if needed
        // or log the operation
    }
    
    // Call original function
    original_glReadPixels(x, y, width, height, format, type, pixels);
}

void hooked_glBindFramebuffer(GLenum target, GLuint framebuffer) {
    // Track framebuffer binding
    printk(KERN_INFO "OPENGL: Framebuffer bound (target: %d, id: %d)\n", 
           target, framebuffer);
    
    // Call original function
    original_glBindFramebuffer(target, framebuffer);
}

// Initialize framebuffer capture
static int init_framebuffer_capture(int width, int height) {
    size_t size = width * height * 4; // RGBA
    
    fb_capture.data = kmalloc(size, GFP_KERNEL);
    if (!fb_capture.data) {
        return -ENOMEM;
    }
    
    fb_capture.width = width;
    fb_capture.height = height;
    fb_capture.format = GL_RGBA;
    fb_capture.size = size;
    fb_capture.is_captured = true;
    
    printk(KERN_INFO "OPENGL: Framebuffer capture initialized (%dx%d)\n", 
           width, height);
    return 0;
}

// Install OpenGL hooks
static int install_opengl_hooks(void) {
    // Find OpenGL function addresses
    original_glSwapBuffers = (glSwapBuffers_t)kallsyms_lookup_name("glSwapBuffers");
    original_glReadPixels = (glReadPixels_t)kallsyms_lookup_name("glReadPixels");
    original_glBindFramebuffer = (glBindFramebuffer_t)kallsyms_lookup_name("glBindFramebuffer");
    
    if (!original_glSwapBuffers || !original_glReadPixels || !original_glBindFramebuffer) {
        printk(KERN_ERR "OPENGL: Failed to find OpenGL functions\n");
        return -ENOENT;
    }
    
    // Install hooks (simplified - would need proper hooking mechanism)
    printk(KERN_INFO "OPENGL: Hooks installed\n");
    return 0;
}

2. DirectX Driver Bypass

// directx_bypass.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/drm/drm.h>

// DirectX function pointers
typedef HRESULT (*Present_t)(IDXGISwapChain*, UINT, UINT);
typedef HRESULT (*GetBuffer_t)(IDXGISwapChain*, UINT, REFIID, void**);
typedef HRESULT (*CreateTexture2D_t)(ID3D11Device*, const D3D11_TEXTURE2D_DESC*, 
                                    const D3D11_SUBRESOURCE_DATA*, ID3D11Texture2D**);

static Present_t original_Present = NULL;
static GetBuffer_t original_GetBuffer = NULL;
static CreateTexture2D_t original_CreateTexture2D = NULL;

// DirectX capture structure
struct directx_capture {
    ID3D11Texture2D *backbuffer;
    ID3D11Texture2D *staging_texture;
    D3D11_TEXTURE2D_DESC desc;
    bool is_captured;
};

static struct directx_capture dx_capture = {0};

// Hooked DirectX functions
HRESULT hooked_Present(IDXGISwapChain *swap_chain, UINT sync_interval, UINT flags) {
    HRESULT result;
    
    // Capture backbuffer before present
    if (dx_capture.is_captured) {
        ID3D11Texture2D *backbuffer = NULL;
        result = swap_chain->lpVtbl->GetBuffer(swap_chain, 0, 
                                              &IID_ID3D11Texture2D, (void**)&backbuffer);
        
        if (SUCCEEDED(result)) {
            // Copy to staging texture
            // This would require D3D11 device context
            printk(KERN_INFO "DIRECTX: Backbuffer captured\n");
            backbuffer->lpVtbl->Release(backbuffer);
        }
    }
    
    // Call original function
    result = original_Present(swap_chain, sync_interval, flags);
    
    return result;
}

HRESULT hooked_GetBuffer(IDXGISwapChain *swap_chain, UINT buffer, 
                        REFIID riid, void **pp_surface) {
    HRESULT result;
    
    // Intercept buffer access
    printk(KERN_INFO "DIRECTX: GetBuffer called (buffer: %d)\n", buffer);
    
    // Call original function
    result = original_GetBuffer(swap_chain, buffer, riid, pp_surface);
    
    return result;
}

// Install DirectX hooks
static int install_directx_hooks(void) {
    // Find DirectX function addresses
    original_Present = (Present_t)kallsyms_lookup_name("Present");
    original_GetBuffer = (GetBuffer_t)kallsyms_lookup_name("GetBuffer");
    
    if (!original_Present || !original_GetBuffer) {
        printk(KERN_ERR "DIRECTX: Failed to find DirectX functions\n");
        return -ENOENT;
    }
    
    printk(KERN_INFO "DIRECTX: Hooks installed\n");
    return 0;
}

3. DRM Driver Bypass

// drm_bypass.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/drm/drm.h>
#include <linux/drm/drm_drv.h>
#include <linux/drm/drm_gem.h>
#include <linux/drm/drm_framebuffer.h>

// DRM driver structure
struct drm_bypass_driver {
    struct drm_driver driver;
    struct drm_device *dev;
    struct drm_framebuffer *capture_fb;
    void *capture_data;
    size_t capture_size;
};

static struct drm_bypass_driver bypass_driver = {0};

// DRM driver operations
static int bypass_load(struct drm_device *dev, unsigned long flags) {
    printk(KERN_INFO "DRM: Bypass driver loaded\n");
    bypass_driver.dev = dev;
    return 0;
}

static void bypass_unload(struct drm_device *dev) {
    printk(KERN_INFO "DRM: Bypass driver unloaded\n");
}

static int bypass_open(struct drm_device *dev, struct drm_file *file_priv) {
    printk(KERN_INFO "DRM: Device opened\n");
    return 0;
}

static void bypass_postclose(struct drm_device *dev, struct drm_file *file_priv) {
    printk(KERN_INFO "DRM: Device closed\n");
}

// Framebuffer operations
static int bypass_fb_create(struct drm_device *dev, struct drm_file *file_priv,
                           struct drm_mode_fb_cmd2 *mode_cmd) {
    struct drm_framebuffer *fb;
    int ret;
    
    printk(KERN_INFO "DRM: Creating framebuffer (%dx%d)\n", 
           mode_cmd->width, mode_cmd->height);
    
    // Create framebuffer
    fb = drm_internal_framebuffer_create(dev, mode_cmd, file_priv);
    if (IS_ERR(fb)) {
        return PTR_ERR(fb);
    }
    
    // Store for capture
    bypass_driver.capture_fb = fb;
    
    return 0;
}

static void bypass_fb_destroy(struct drm_framebuffer *fb) {
    printk(KERN_INFO "DRM: Destroying framebuffer\n");
    drm_framebuffer_cleanup(fb);
    kfree(fb);
}

// IOCTL operations
static int bypass_ioctl(struct drm_device *dev, void *data,
                       struct drm_file *file_priv) {
    struct drm_mode_fb_cmd2 *fb_cmd = data;
    
    switch (fb_cmd->cmd) {
        case DRM_IOCTL_MODE_CREATE_FB:
            return bypass_fb_create(dev, file_priv, fb_cmd);
        default:
            return -EINVAL;
    }
}

// DRM driver definition
static struct drm_driver bypass_drm_driver = {
    .driver_features = DRIVER_MODESET | DRIVER_GEM,
    .load = bypass_load,
    .unload = bypass_unload,
    .open = bypass_open,
    .postclose = bypass_postclose,
    .ioctls = bypass_ioctl,
    .fops = &bypass_driver_fops,
    .name = "bypass_drm",
    .desc = "DRM Bypass Driver",
    .date = "2024",
    .major = 1,
    .minor = 0,
    .patchlevel = 0,
};

⌨️ Input Driver Interception

Concept Overview

Input driver interception involves capturing and modifying input events (keyboard, mouse) at the driver level to bypass anti-cheat input monitoring. This technique allows us to:

  • Intercept keyboard and mouse events
  • Modify input data before it reaches the application
  • Bypass input validation
  • Implement custom input handling

Technical Implementation

1. Keyboard Driver Interception

// keyboard_intercept.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/irq.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Tibia Bot Developer");
MODULE_DESCRIPTION("Keyboard Input Interception");

// Keyboard event structure
struct keyboard_event {
    unsigned int code;
    int value;
    unsigned long timestamp;
    bool is_modified;
};

// Interception data
struct keyboard_intercept {
    struct input_dev *dev;
    void (*original_event)(struct input_dev *, unsigned int, unsigned int, int);
    struct keyboard_event last_event;
    bool interception_enabled;
    pid_t target_pid;
};

static struct keyboard_intercept kbd_intercept = {0};

// Hooked keyboard event handler
static void hooked_keyboard_event(struct input_dev *dev,
                                 unsigned int type,
                                 unsigned int code,
                                 int value) {
    struct keyboard_event event;
    
    // Check if this is our target process
    if (current->pid == kbd_intercept.target_pid) {
        event.code = code;
        event.value = value;
        event.timestamp = jiffies;
        event.is_modified = false;
        
        // Log the event
        printk(KERN_INFO "KEYBOARD: Event (code: %d, value: %d, pid: %d)\n", 
               code, value, current->pid);
        
        // Modify event if needed
        if (code == KEY_W) {
            // Example: Modify W key press
            if (value == 1) {
                event.value = 0; // Suppress W key
                event.is_modified = true;
                printk(KERN_INFO "KEYBOARD: Suppressed W key\n");
            }
        }
        
        // Store last event
        kbd_intercept.last_event = event;
        
        // Call original handler with modified values
        if (event.is_modified) {
            kbd_intercept.original_event(dev, type, event.code, event.value);
        } else {
            kbd_intercept.original_event(dev, type, code, value);
        }
    } else {
        // Pass through for other processes
        kbd_intercept.original_event(dev, type, code, value);
    }
}

// Install keyboard hook
static int install_keyboard_hook(struct input_dev *dev) {
    if (!dev) {
        return -EINVAL;
    }
    
    // Store original event handler
    kbd_intercept.original_event = dev->event;
    kbd_intercept.dev = dev;
    kbd_intercept.interception_enabled = true;
    
    // Install hook
    dev->event = hooked_keyboard_event;
    
    printk(KERN_INFO "KEYBOARD: Hook installed on device %s\n", dev->name);
    return 0;
}

// Remove keyboard hook
static void remove_keyboard_hook(void) {
    if (kbd_intercept.dev && kbd_intercept.original_event) {
        kbd_intercept.dev->event = kbd_intercept.original_event;
        kbd_intercept.interception_enabled = false;
        printk(KERN_INFO "KEYBOARD: Hook removed\n");
    }
}

2. Mouse Driver Interception

// mouse_intercept.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/input/mt.h>

// Mouse event structure
struct mouse_event {
    int x;
    int y;
    int buttons;
    int wheel;
    unsigned long timestamp;
    bool is_modified;
};

// Mouse interception data
struct mouse_intercept {
    struct input_dev *dev;
    void (*original_event)(struct input_dev *, unsigned int, unsigned int, int);
    struct mouse_event last_event;
    bool interception_enabled;
    pid_t target_pid;
    int sensitivity_multiplier;
};

static struct mouse_intercept mouse_intercept = {0};

// Hooked mouse event handler
static void hooked_mouse_event(struct input_dev *dev,
                              unsigned int type,
                              unsigned int code,
                              int value) {
    struct mouse_event event;
    
    // Check if this is our target process
    if (current->pid == mouse_intercept.target_pid) {
        event.timestamp = jiffies;
        event.is_modified = false;
        
        // Handle different mouse events
        switch (type) {
            case EV_REL:
                switch (code) {
                    case REL_X:
                        event.x = value * mouse_intercept.sensitivity_multiplier;
                        event.is_modified = true;
                        printk(KERN_INFO "MOUSE: X movement %d -> %d\n", 
                               value, event.x);
                        break;
                    case REL_Y:
                        event.y = value * mouse_intercept.sensitivity_multiplier;
                        event.is_modified = true;
                        printk(KERN_INFO "MOUSE: Y movement %d -> %d\n", 
                               value, event.y);
                        break;
                    case REL_WHEEL:
                        event.wheel = value;
                        break;
                }
                break;
                
            case EV_KEY:
                switch (code) {
                    case BTN_LEFT:
                    case BTN_RIGHT:
                    case BTN_MIDDLE:
                        event.buttons = value;
                        printk(KERN_INFO "MOUSE: Button %d = %d\n", code, value);
                        break;
                }
                break;
        }
        
        // Store last event
        mouse_intercept.last_event = event;
        
        // Call original handler with modified values
        if (event.is_modified) {
            if (type == EV_REL && code == REL_X) {
                mouse_intercept.original_event(dev, type, code, event.x);
            } else if (type == EV_REL && code == REL_Y) {
                mouse_intercept.original_event(dev, type, code, event.y);
            } else {
                mouse_intercept.original_event(dev, type, code, value);
            }
        } else {
            mouse_intercept.original_event(dev, type, code, value);
        }
    } else {
        // Pass through for other processes
        mouse_intercept.original_event(dev, type, code, value);
    }
}

// Install mouse hook
static int install_mouse_hook(struct input_dev *dev) {
    if (!dev) {
        return -EINVAL;
    }
    
    // Store original event handler
    mouse_intercept.original_event = dev->event;
    mouse_intercept.dev = dev;
    mouse_intercept.interception_enabled = true;
    mouse_intercept.sensitivity_multiplier = 2; // 2x sensitivity
    
    // Install hook
    dev->event = hooked_mouse_event;
    
    printk(KERN_INFO "MOUSE: Hook installed on device %s\n", dev->name);
    return 0;
}

// Remove mouse hook
static void remove_mouse_hook(void) {
    if (mouse_intercept.dev && mouse_intercept.original_event) {
        mouse_intercept.dev->event = mouse_intercept.original_event;
        mouse_intercept.interception_enabled = false;
        printk(KERN_INFO "MOUSE: Hook removed\n");
    }
}

3. Input Device Enumeration

// input_enumeration.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/input/mt.h>

// Input device info
struct input_device_info {
    char name[64];
    char phys[64];
    char uniq[64];
    unsigned long evbit[NLONGS(EV_CNT)];
    unsigned long keybit[NLONGS(KEY_CNT)];
    unsigned long relbit[NLONGS(REL_CNT)];
    unsigned long absbit[NLONGS(ABS_CNT)];
    unsigned long mscbit[NLONGS(MSC_CNT)];
    unsigned long ledbit[NLONGS(LED_CNT)];
    unsigned long sndbit[NLONGS(SND_CNT)];
    unsigned long ffbit[NLONGS(FF_CNT)];
    unsigned long swbit[NLONGS(SW_CNT)];
    unsigned int keycodemax;
    unsigned int keycodesize;
    void *keycode;
    int abs[ABS_CNT][2];
    int rep[REP_CNT];
    unsigned long ff_effects_max;
    struct timer_list timer;
    int sync;
    struct input_mt_slot *mt;
    int mtsize;
    int slot;
    int trkid;
    struct input_handle *grab;
    spinlock_t event_lock;
    struct mutex mutex;
    unsigned int users;
    bool going_away;
    struct device dev;
    struct list_head h_list;
    struct list_head node;
};

// Enumerate input devices
static void enumerate_input_devices(void) {
    struct input_dev *dev;
    int count = 0;
    
    printk(KERN_INFO "INPUT: Enumerating input devices...\n");
    
    list_for_each_entry(dev, &input_dev_list, node) {
        printk(KERN_INFO "INPUT: Device %d: %s\n", count, dev->name);
        printk(KERN_INFO "INPUT:   Phys: %s\n", dev->phys);
        printk(KERN_INFO "INPUT:   Uniq: %s\n", dev->uniq);
        
        // Check device capabilities
        if (test_bit(EV_KEY, dev->evbit)) {
            printk(KERN_INFO "INPUT:   Supports keys\n");
        }
        if (test_bit(EV_REL, dev->evbit)) {
            printk(KERN_INFO "INPUT:   Supports relative motion\n");
        }
        if (test_bit(EV_ABS, dev->evbit)) {
            printk(KERN_INFO "INPUT:   Supports absolute motion\n");
        }
        
        count++;
    }
    
    printk(KERN_INFO "INPUT: Found %d input devices\n", count);
}

// Find specific input device
static struct input_dev *find_input_device(const char *name) {
    struct input_dev *dev;
    
    list_for_each_entry(dev, &input_dev_list, node) {
        if (strstr(dev->name, name)) {
            printk(KERN_INFO "INPUT: Found device: %s\n", dev->name);
            return dev;
        }
    }
    
    return NULL;
}

🌐 Network Driver Bypass

Concept Overview

Network driver bypass involves intercepting and modifying network traffic at the driver level to bypass anti-cheat network monitoring. This technique allows us to:

  • Intercept network packets
  • Modify packet data
  • Bypass packet validation
  • Implement custom network handling

Technical Implementation

1. Network Packet Interception

// network_intercept.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Tibia Bot Developer");
MODULE_DESCRIPTION("Network Packet Interception");

// Network packet structure
struct network_packet {
    unsigned char *data;
    size_t size;
    struct sockaddr_in src_addr;
    struct sockaddr_in dst_addr;
    unsigned short protocol;
    bool is_modified;
};

// Network interception data
struct network_intercept {
    struct nf_hook_ops nfho;
    struct network_packet last_packet;
    bool interception_enabled;
    unsigned int target_port;
    char target_ip[16];
};

static struct network_intercept net_intercept = {0};

// Hooked network function
static unsigned int hooked_net_hook(void *priv, struct sk_buff *skb,
                                   const struct nf_hook_state *state) {
    struct iphdr *iph;
    struct tcphdr *tcph;
    struct udphdr *udph;
    struct network_packet packet;
    
    if (!skb) {
        return NF_ACCEPT;
    }
    
    // Get IP header
    iph = ip_hdr(skb);
    if (!iph) {
        return NF_ACCEPT;
    }
    
    // Check if this is our target traffic
    if (iph->protocol == IPPROTO_TCP) {
        tcph = tcp_hdr(skb);
        if (tcph && ntohs(tcph->dest) == net_intercept.target_port) {
            // Intercept TCP packet
            packet.data = skb->data;
            packet.size = skb->len;
            packet.src_addr.sin_addr.s_addr = iph->saddr;
            packet.dst_addr.sin_addr.s_addr = iph->daddr;
            packet.src_addr.sin_port = tcph->source;
            packet.dst_addr.sin_port = tcph->dest;
            packet.protocol = IPPROTO_TCP;
            packet.is_modified = false;
            
            printk(KERN_INFO "NETWORK: TCP packet intercepted (size: %zu)\n", 
                   packet.size);
            
            // Modify packet if needed
            if (packet.size > 0) {
                // Example: Modify packet data
                // packet.data[0] = 0xAA;
                // packet.is_modified = true;
            }
            
            // Store last packet
            net_intercept.last_packet = packet;
        }
    } else if (iph->protocol == IPPROTO_UDP) {
        udph = udp_hdr(skb);
        if (udph && ntohs(udph->dest) == net_intercept.target_port) {
            // Intercept UDP packet
            packet.data = skb->data;
            packet.size = skb->len;
            packet.src_addr.sin_addr.s_addr = iph->saddr;
            packet.dst_addr.sin_addr.s_addr = iph->daddr;
            packet.src_addr.sin_port = udph->source;
            packet.dst_addr.sin_port = udph->dest;
            packet.protocol = IPPROTO_UDP;
            packet.is_modified = false;
            
            printk(KERN_INFO "NETWORK: UDP packet intercepted (size: %zu)\n", 
                   packet.size);
            
            // Store last packet
            net_intercept.last_packet = packet;
        }
    }
    
    return NF_ACCEPT;
}

// Install network hook
static int install_network_hook(void) {
    net_intercept.nfho.hook = hooked_net_hook;
    net_intercept.nfho.hooknum = NF_INET_PRE_ROUTING;
    net_intercept.nfho.pf = PF_INET;
    net_intercept.nfho.priority = NF_IP_PRI_FIRST;
    
    net_intercept.interception_enabled = true;
    net_intercept.target_port = 7171; // Tibia default port
    strcpy(net_intercept.target_ip, "127.0.0.1");
    
    if (nf_register_net_hook(&init_net, &net_intercept.nfho)) {
        printk(KERN_ERR "NETWORK: Failed to register hook\n");
        return -ENOENT;
    }
    
    printk(KERN_INFO "NETWORK: Hook installed (port: %d)\n", 
           net_intercept.target_port);
    return 0;
}

// Remove network hook
static void remove_network_hook(void) {
    if (net_intercept.interception_enabled) {
        nf_unregister_net_hook(&init_net, &net_intercept.nfho);
        net_intercept.interception_enabled = false;
        printk(KERN_INFO "NETWORK: Hook removed\n");
    }
}

2. Socket Interception

// socket_intercept.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/net.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/in.h>
#include <linux/inet.h>

// Socket operation hooks
typedef int (*sys_socket_t)(int, int, int);
typedef int (*sys_connect_t)(int, struct sockaddr *, int);
typedef int (*sys_send_t)(int, const void *, size_t, int);
typedef int (*sys_recv_t)(int, void *, size_t, int);

static sys_socket_t original_socket = NULL;
static sys_connect_t original_connect = NULL;
static sys_send_t original_send = NULL;
static sys_recv_t original_recv = NULL;

// Hooked socket functions
int hooked_socket(int domain, int type, int protocol) {
    int sock = original_socket(domain, type, protocol);
    
    printk(KERN_INFO "SOCKET: Socket created (fd: %d, domain: %d, type: %d)\n", 
           sock, domain, type);
    
    return sock;
}

int hooked_connect(int sockfd, struct sockaddr *addr, int addrlen) {
    struct sockaddr_in *sin = (struct sockaddr_in *)addr;
    int ret;
    
    if (sin->sin_family == AF_INET) {
        printk(KERN_INFO "SOCKET: Connect to %pI4:%d\n", 
               &sin->sin_addr, ntohs(sin->sin_port));
    }
    
    ret = original_connect(sockfd, addr, addrlen);
    
    return ret;
}

int hooked_send(int sockfd, const void *buf, size_t len, int flags) {
    int ret;
    
    printk(KERN_INFO "SOCKET: Send %zu bytes on fd %d\n", len, sockfd);
    
    // Log first few bytes
    if (len > 0) {
        printk(KERN_INFO "SOCKET: Data: %02x %02x %02x %02x...\n", 
               ((unsigned char *)buf)[0], ((unsigned char *)buf)[1],
               ((unsigned char *)buf)[2], ((unsigned char *)buf)[3]);
    }
    
    ret = original_send(sockfd, buf, len, flags);
    
    return ret;
}

int hooked_recv(int sockfd, void *buf, size_t len, int flags) {
    int ret;
    
    ret = original_recv(sockfd, buf, len, flags);
    
    if (ret > 0) {
        printk(KERN_INFO "SOCKET: Received %d bytes on fd %d\n", ret, sockfd);
        
        // Log first few bytes
        if (ret > 0) {
            printk(KERN_INFO "SOCKET: Data: %02x %02x %02x %02x...\n", 
                   ((unsigned char *)buf)[0], ((unsigned char *)buf)[1],
                   ((unsigned char *)buf)[2], ((unsigned char *)buf)[3]);
        }
    }
    
    return ret;
}

// Install socket hooks
static int install_socket_hooks(void) {
    // Find original functions
    original_socket = (sys_socket_t)kallsyms_lookup_name("sys_socket");
    original_connect = (sys_connect_t)kallsyms_lookup_name("sys_connect");
    original_send = (sys_send_t)kallsyms_lookup_name("sys_send");
    original_recv = (sys_recv_t)kallsyms_lookup_name("sys_recv");
    
    if (!original_socket || !original_connect || !original_send || !original_recv) {
        printk(KERN_ERR "SOCKET: Failed to find socket functions\n");
        return -ENOENT;
    }
    
    printk(KERN_INFO "SOCKET: Hooks installed\n");
    return 0;
}

🛠️ Implementation Details

Build System

1. Complete Makefile

# Makefile for custom drivers
obj-m += opengl_bypass.o
obj-m += directx_bypass.o
obj-m += drm_bypass.o
obj-m += keyboard_intercept.o
obj-m += mouse_intercept.o
obj-m += input_enumeration.o
obj-m += network_intercept.o
obj-m += socket_intercept.o

KDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)

# Compiler flags
ccflags-y := -DDEBUG -g -O2 -I$(KDIR)/include

all: modules user_tools

modules:
	$(MAKE) -C $(KDIR) M=$(PWD) modules

user_tools: driver_control input_monitor network_monitor

driver_control: driver_control.c
	gcc -o driver_control driver_control.c

input_monitor: input_monitor.c
	gcc -o input_monitor input_monitor.c

network_monitor: network_monitor.c
	gcc -o network_monitor network_monitor.c

clean:
	$(MAKE) -C $(KDIR) M=$(PWD) clean
	rm -f driver_control input_monitor network_monitor

install:
	$(MAKE) -C $(KDIR) M=$(PWD) modules_install
	depmod -a

load_all:
	sudo insmod opengl_bypass.ko
	sudo insmod directx_bypass.ko
	sudo insmod drm_bypass.ko
	sudo insmod keyboard_intercept.ko
	sudo insmod mouse_intercept.ko
	sudo insmod network_intercept.ko
	sudo insmod socket_intercept.ko

unload_all:
	sudo rmmod socket_intercept
	sudo rmmod network_intercept
	sudo rmmod mouse_intercept
	sudo rmmod keyboard_intercept
	sudo rmmod drm_bypass
	sudo rmmod directx_bypass
	sudo rmmod opengl_bypass

test:
	sudo dmesg | grep -E "(OPENGL|DIRECTX|DRM|KEYBOARD|MOUSE|NETWORK|SOCKET)"

2. Driver Control Interface

// driver_control.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>

#define DRIVER_IOCTL_ENABLE _IOR('D', 1, int)
#define DRIVER_IOCTL_DISABLE _IOR('D', 2, int)
#define DRIVER_IOCTL_SET_TARGET _IOR('D', 3, int)
#define DRIVER_IOCTL_GET_STATUS _IOR('D', 4, int)

int main(int argc, char *argv[]) {
    int fd;
    int cmd;
    int target_pid;
    
    if (argc < 2) {
        printf("Usage: %s <command> [pid]\n", argv[0]);
        printf("Commands: enable, disable, set_target, status\n");
        return 1;
    }
    
    // Open driver control interface
    fd = open("/proc/driver_control", O_RDWR);
    if (fd < 0) {
        perror("Failed to open driver control");
        return 1;
    }
    
    if (strcmp(argv[1], "enable") == 0) {
        cmd = DRIVER_IOCTL_ENABLE;
        if (ioctl(fd, cmd, 0) < 0) {
            perror("Failed to enable driver");
        } else {
            printf("Driver enabled\n");
        }
    } else if (strcmp(argv[1], "disable") == 0) {
        cmd = DRIVER_IOCTL_DISABLE;
        if (ioctl(fd, cmd, 0) < 0) {
            perror("Failed to disable driver");
        } else {
            printf("Driver disabled\n");
        }
    } else if (strcmp(argv[1], "set_target") == 0) {
        if (argc < 3) {
            printf("Please specify target PID\n");
            return 1;
        }
        target_pid = atoi(argv[2]);
        cmd = DRIVER_IOCTL_SET_TARGET;
        if (ioctl(fd, cmd, &target_pid) < 0) {
            perror("Failed to set target PID");
        } else {
            printf("Target PID set to %d\n", target_pid);
        }
    } else if (strcmp(argv[1], "status") == 0) {
        int status;
        cmd = DRIVER_IOCTL_GET_STATUS;
        if (ioctl(fd, cmd, &status) < 0) {
            perror("Failed to get status");
        } else {
            printf("Driver status: %d\n", status);
        }
    } else {
        printf("Unknown command: %s\n", argv[1]);
    }
    
    close(fd);
    return 0;
}

🔒 Security Considerations

Detection Avoidance

1. Driver Stealth

// driver_stealth.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>

// Hide driver from system
static void hide_driver(struct module *mod) {
    // Remove from module list
    list_del(&mod->list);
    
    // Hide from /proc/modules
    // Hide from sysfs
    // Remove module references
}

// Encrypt driver data
static void encrypt_driver_data(void *data, size_t size) {
    // XOR encryption with random key
    unsigned char key = 0x55;
    unsigned char *ptr = (unsigned char *)data;
    int i;
    
    for (i = 0; i < size; i++) {
        ptr[i] ^= key;
    }
}

2. Anti-Detection

// anti_detection.c
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>

// Bypass driver detection
static void bypass_driver_detection(void) {
    // Hook detection functions
    // Modify detection results
    // Hide driver signatures
}

// Randomize driver behavior
static void randomize_behavior(void) {
    // Add random delays
    // Vary hook behavior
    // Randomize data patterns
}

📊 Performance Metrics

Benchmarking

// performance_benchmark.c
#include <linux/module.h>
#include <linux/time.h>

struct driver_performance {
    unsigned long graphics_time;
    unsigned long input_time;
    unsigned long network_time;
    int total_operations;
};

static struct driver_performance perf = {0};

// Measure driver performance
static void measure_performance(void (*func)(void), unsigned long *time) {
    struct timespec start, end;
    
    getnstimeofday(&start);
    func();
    getnstimeofday(&end);
    
    *time = (end.tv_sec - start.tv_sec) * 1000000000ULL +
            (end.tv_nsec - start.tv_nsec);
}

// Performance report
static void print_performance_report(void) {
    printk(KERN_INFO "PERFORMANCE: Graphics avg: %lu ns\n", 
           perf.graphics_time / perf.total_operations);
    printk(KERN_INFO "PERFORMANCE: Input avg: %lu ns\n", 
           perf.input_time / perf.total_operations);
    printk(KERN_INFO "PERFORMANCE: Network avg: %lu ns\n", 
           perf.network_time / perf.total_operations);
}

This document provides a comprehensive technical overview of custom drivers for anti-cheat bypass. Implementation requires deep driver programming knowledge and should be used responsibly.