1. main函数测试libusb传输功能；

2. liusbmod目前可以打印抓取到传输的数据是什么；打印只能打印16个字节

Makefile

@@ -3,8 +3,30 @@ obj-m += libusbMod.o
 KDIR := /lib/modules/$(shell uname -r)/build
 PWD  := $(shell pwd)
 
-all:
+CC := gcc
+CFLAGS := -Wall -O2
+LIBS := -lusb-1.0
+
+# 默认目标：同时编译内核模块和用户程序
+all: libusbMod.ko main
+
+# 编译内核模块
+libusbMod.ko:
 	make -C $(KDIR) M=$(PWD) modules
 
+# 编译用户态程序 main
+main: main.c
+	$(CC) $(CFLAGS) -o $@ $< $(LIBS)
+
+# 清理所有生成文件
 clean:
-	make -C $(KDIR) M=$(PWD) clean
+	make -C $(KDIR) M=$(PWD) clean
+	$(RM) main
+
+# 加载模块
+load:
+	sudo insmod libusbMod.ko
+
+# 卸载模块
+unload:
+	sudo rmmod libusbMod

libusbMod.c

@@ -3,6 +3,7 @@
 #include <linux/usbdevice_fs.h>
 #include <linux/kprobes.h>
 #include <linux/sched.h>
+#include <linux/uaccess.h> // for copy_from_user
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Leo");
@@ -13,11 +14,36 @@ static struct kprobe kp;
 static int handler_pre(struct kprobe *p, struct pt_regs *regs)
 {
     unsigned int cmd = 0;
+    struct usbdevfs_urb urb_kern;
+    struct usbdevfs_urb __user *urb_user;
 
     cmd = (unsigned int)regs->regs[1]; // ioctl 的第二个参数
 
     if (cmd == USBDEVFS_SUBMITURB) {
-        pr_info("[usbFilter] process: %s, pid: %d, called USBDEVFS_SUBMITURB ioctl\n", current->comm, current->pid);
+        urb_user = (struct usbdevfs_urb __user *)regs->regs[2]; // 第三个参数
+        if (urb_user) {
+            if (copy_from_user(&urb_kern, urb_user, sizeof(struct usbdevfs_urb)) == 0) {
+                pr_info("[usbFilter] process: %s, pid: %d, ep: 0x%x, len: %d\n",
+                        current->comm, current->pid,
+                        urb_kern.endpoint, urb_kern.buffer_length);
+
+                if (urb_kern.buffer && urb_kern.buffer_length > 0) {
+                    unsigned char data[16] = {0};
+                    unsigned int to_copy = urb_kern.buffer_length > 16 ? 16 : urb_kern.buffer_length;
+                    if (copy_from_user(data, urb_kern.buffer, to_copy) == 0) {
+                        char hex[3 * 16 + 1] = {0};
+                        int i;
+                        for (i = 0; i < to_copy; ++i)
+                            snprintf(hex + i * 3, 4, "%02X ", data[i]);
+                        pr_info("[usbFilter] first %u bytes (hex): %s\n", to_copy, hex);
+                    } else {
+                        pr_warn("[usbFilter] copy_from_user buffer failed\n");
+                    }
+                }
+            } else {
+                pr_warn("[usbFilter] copy_from_user failed\n");
+            }
+        }
     }
     return 0;
 }

main.c

@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <libusb-1.0/libusb.h>
+
+#define VENDOR_ID  0x1a86   // 替换为你的设备 VID
+#define PRODUCT_ID 0x55de   // 替换为你的设备 PID
+#define BULK_EP_OUT 0x06    // OUT端点地址（低位为0表示OUT）
+#define INTERFACE_NUMBER 4  // USB接口编号
+
+int main(void) {
+    libusb_device_handle *handle = NULL;
+    int r;
+    int transferred;
+    unsigned char send_data[] = {0x01, 0x02, 0x03, 0x04, 0x05}; // 要发送的数据
+
+    // 初始化libusb
+    r = libusb_init(NULL);
+    if (r < 0) {
+        fprintf(stderr, "Failed to init libusb: %s\n", libusb_error_name(r));
+        return EXIT_FAILURE;
+    }
+
+    // 打开设备
+    handle = libusb_open_device_with_vid_pid(NULL, VENDOR_ID, PRODUCT_ID);
+    if (!handle) {
+        fprintf(stderr, "Failed to open device\n");
+        libusb_exit(NULL);
+        return EXIT_FAILURE;
+    }
+
+    // 获取接口权限（可选，部分系统如Linux必须）
+    if (libusb_kernel_driver_active(handle, INTERFACE_NUMBER)) {
+        libusb_detach_kernel_driver(handle, INTERFACE_NUMBER);
+    }
+
+    r = libusb_claim_interface(handle, INTERFACE_NUMBER);
+    if (r < 0) {
+        fprintf(stderr, "Failed to claim interface: %s\n", libusb_error_name(r));
+        libusb_close(handle);
+        libusb_exit(NULL);
+        return EXIT_FAILURE;
+    }
+
+    // 发送数据（Bulk OUT）
+    r = libusb_bulk_transfer(handle, BULK_EP_OUT, send_data, sizeof(send_data), &transferred, 1000);
+    if (r == 0) {
+        printf("Sent %d\n", transferred);
+        if (transferred != sizeof(send_data)) {
+            fprintf(stderr, "Warning: Only %d of %zu bytes sent\n", transferred, sizeof(send_data));
+        }
+    } else {
+        fprintf(stderr, "Failed to send data: %s\n", libusb_error_name(r));
+    }
+
+    // 释放接口 & 关闭
+    libusb_release_interface(handle, INTERFACE_NUMBER);
+    libusb_close(handle);
+    libusb_exit(NULL);
+
+    return EXIT_SUCCESS;
+}