RadioControl v1.0.0 — KernelSU-Next module for radio engineering
Shannon 5400 AT command terminal, BCM4390 WiFi mode switching, carrier config override, debugfs browser, RF thermal monitoring, CP debug, Thread/Wonder radio, satellite/NTN test support. Verified on Pixel 10 Pro Fold (Tensor G5 / laguna).
This commit is contained in:
sssnake
22
common/kmod/Makefile
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22
common/kmod/Makefile
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@@ -0,0 +1,22 @@
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# RadioControl out-of-tree kernel modules
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# Build: make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- KERNEL_DIR=/path/to/kernel
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KERNEL_DIR ?= /lib/modules/$(shell uname -r)/build
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obj-$(CONFIG_RC_WIFI_MON) += rc_wifi_mon.o
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obj-$(CONFIG_RC_DIAG_BRIDGE) += rc_diag_bridge.o
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obj-$(CONFIG_RC_SHANNON_CMD) += rc_shannon_cmd.o
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# Default: build all
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CONFIG_RC_WIFI_MON ?= m
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CONFIG_RC_DIAG_BRIDGE ?= m
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CONFIG_RC_SHANNON_CMD ?= m
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all:
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$(MAKE) -C $(KERNEL_DIR) M=$(CURDIR) modules
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clean:
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$(MAKE) -C $(KERNEL_DIR) M=$(CURDIR) clean
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install:
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$(MAKE) -C $(KERNEL_DIR) M=$(CURDIR) modules_install
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54
common/kmod/README.md
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54
common/kmod/README.md
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@@ -0,0 +1,54 @@
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# RadioControl Kernel Modules
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Out-of-tree kernel modules for enabling hardware features that are
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compiled out of production Android kernels.
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## Build Requirements
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- Matching kernel headers for target device
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- ARM64 cross-compiler (aarch64-linux-gnu-gcc)
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- Device-specific kernel config
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## Modules
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### rc_wifi_mon.ko
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Patches the WiFi driver's nl80211 ops table at runtime to allow
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monitor mode and packet injection on chipsets that have the capability
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but disable it in their cfg80211 change_virtual_intf handler.
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Supports:
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- Samsung SCSC/SLSI (slsi_set_monitor_mode — re-enables compiled-out path)
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- Broadcom bcmdhd (patches cfg80211_ops to allow NL80211_IFTYPE_MONITOR)
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- Qualcomm ath11k/ath12k/cnss (typically already supports monitor, but
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this bypasses vendor restrictions)
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### rc_diag_bridge.ko
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Creates /dev/rc_diag — a simplified userspace interface to the Qualcomm
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DIAG subsystem that bypasses the standard diag driver's filtering.
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Allows reading/writing NV items and sending FTM commands from userspace.
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### rc_shannon_cmd.ko
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Creates /dev/rc_shannon — direct command interface to Samsung Shannon
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modem bypassing RIL. Allows raw AT command passthrough and IPC message
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injection for band locking, NR mode control, and diagnostic readout.
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## Building
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```bash
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# Set up cross-compilation
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export ARCH=arm64
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export CROSS_COMPILE=aarch64-linux-gnu-
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export KERNEL_DIR=/path/to/kernel/source
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# Build all modules
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make -C $KERNEL_DIR M=$(pwd) modules
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# Or build individually
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make -C $KERNEL_DIR M=$(pwd) CONFIG_RC_WIFI_MON=m modules
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```
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## Runtime Loading
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Modules are loaded by the RadioControl service.sh based on detected chipset.
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KernelSU module overlay places them in /vendor/lib/modules/ or loads
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directly via insmod.
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398
common/kmod/rc_diag_bridge.c
Normal file
398
common/kmod/rc_diag_bridge.c
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@@ -0,0 +1,398 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* rc_diag_bridge.ko — Qualcomm DIAG protocol bridge for userspace
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*
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* Creates /dev/rc_diag — a simplified interface to the Qualcomm
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* diagnostic subsystem for reading/writing NV items, sending FTM
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* (Factory Test Mode) commands, and accessing EFS.
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*
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* The standard /dev/diag interface requires complex multiplexing
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* with the diag driver. This module provides a clean request/response
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* interface that handles the DIAG protocol framing internally.
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*
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* Supports:
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* - NV_READ (cmd 0x26) / NV_WRITE (cmd 0x27)
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* - EFS2 operations (subsys 0x4B, subsys_id 19)
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* - FTM commands (subsys 0x4B, subsys_id 11)
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* - Log mask / message mask configuration
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* - Raw DIAG passthrough for advanced use
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/cdev.h>
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#include <linux/device.h>
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#include <linux/uaccess.h>
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#include <linux/slab.h>
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#include <linux/mutex.h>
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#include <linux/wait.h>
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#include <linux/poll.h>
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#include <linux/ioctl.h>
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("RadioControl");
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MODULE_DESCRIPTION("Qualcomm DIAG protocol bridge for NV/EFS/FTM access");
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MODULE_VERSION("1.0");
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#define DEVICE_NAME "rc_diag"
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#define CLASS_NAME "radiocontrol"
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#define DIAG_BUF_SIZE 8192
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/* DIAG command codes */
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#define DIAG_NV_READ_F 0x26
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#define DIAG_NV_WRITE_F 0x27
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#define DIAG_SUBSYS_CMD_F 0x4B
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#define DIAG_LOG_CONFIG_F 0x73
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#define DIAG_MSG_CONFIG_F 0x7D
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/* DIAG subsystem IDs */
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#define DIAG_SUBSYS_FTM 11
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#define DIAG_SUBSYS_EFS2 19
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#define DIAG_SUBSYS_PARAMS 37
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/* IOCTL commands */
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#define RC_DIAG_MAGIC 'D'
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#define RC_DIAG_NV_READ _IOWR(RC_DIAG_MAGIC, 1, struct rc_nv_item)
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#define RC_DIAG_NV_WRITE _IOW(RC_DIAG_MAGIC, 2, struct rc_nv_item)
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#define RC_DIAG_RAW_CMD _IOWR(RC_DIAG_MAGIC, 3, struct rc_diag_raw)
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#define RC_DIAG_FTM_CMD _IOWR(RC_DIAG_MAGIC, 4, struct rc_diag_raw)
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#define RC_DIAG_EFS_READ _IOWR(RC_DIAG_MAGIC, 5, struct rc_efs_op)
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#define RC_DIAG_EFS_WRITE _IOW(RC_DIAG_MAGIC, 6, struct rc_efs_op)
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/* NV item structure */
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struct rc_nv_item {
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uint16_t id;
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uint16_t status; /* 0 = success on return */
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uint8_t data[128];
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uint32_t data_len;
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};
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/* Raw DIAG command */
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struct rc_diag_raw {
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uint8_t cmd[DIAG_BUF_SIZE];
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uint32_t cmd_len;
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uint8_t resp[DIAG_BUF_SIZE];
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uint32_t resp_len;
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};
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/* EFS operation */
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struct rc_efs_op {
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char path[256];
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uint8_t data[4096];
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uint32_t data_len;
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int32_t status;
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};
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/*
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* DIAG HDLC framing — the DIAG protocol uses async HDLC framing
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* with CRC-16 (CCITT). All messages are wrapped in:
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* [0x7E] [escaped payload] [CRC-16 LE] [0x7E]
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*
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* Escape: 0x7E -> 0x7D 0x5E, 0x7D -> 0x7D 0x5D
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*/
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#define HDLC_FLAG 0x7E
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#define HDLC_ESC 0x7D
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#define HDLC_ESC_MASK 0x20
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static const uint16_t crc16_table[256] = {
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0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
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0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
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0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
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0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
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0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
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0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
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0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
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0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
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0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
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0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
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0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
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0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
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0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
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0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
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0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
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0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
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0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
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0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
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0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
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0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
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0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
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0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
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0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
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0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
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0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
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0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
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0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
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0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
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0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
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0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
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0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
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0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78,
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};
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static uint16_t crc16_calc(const uint8_t *buf, int len)
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{
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uint16_t crc = 0xFFFF;
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while (len--)
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crc = crc16_table[(crc ^ *buf++) & 0xFF] ^ (crc >> 8);
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return ~crc & 0xFFFF;
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}
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/* Encode a DIAG message with HDLC framing */
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static int hdlc_encode(const uint8_t *src, int src_len,
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uint8_t *dst, int dst_size)
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{
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uint16_t crc;
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int pos = 0;
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int i;
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crc = crc16_calc(src, src_len);
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dst[pos++] = HDLC_FLAG;
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for (i = 0; i < src_len && pos < dst_size - 4; i++) {
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if (src[i] == HDLC_FLAG || src[i] == HDLC_ESC) {
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dst[pos++] = HDLC_ESC;
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dst[pos++] = src[i] ^ HDLC_ESC_MASK;
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} else {
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dst[pos++] = src[i];
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}
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}
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/* Append CRC (little-endian) with escaping */
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for (i = 0; i < 2 && pos < dst_size - 2; i++) {
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uint8_t b = (crc >> (i * 8)) & 0xFF;
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if (b == HDLC_FLAG || b == HDLC_ESC) {
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dst[pos++] = HDLC_ESC;
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dst[pos++] = b ^ HDLC_ESC_MASK;
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} else {
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dst[pos++] = b;
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}
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}
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dst[pos++] = HDLC_FLAG;
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return pos;
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}
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static int major;
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static struct class *rc_class;
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static struct cdev rc_cdev;
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static struct device *rc_device;
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static struct file *diag_filp;
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static DEFINE_MUTEX(diag_mutex);
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static struct file *open_diag_device(void)
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{
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struct file *f;
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f = filp_open("/dev/diag", O_RDWR | O_NONBLOCK, 0);
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if (!IS_ERR(f))
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return f;
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pr_info("rc_diag: /dev/diag not available (%ld)\n", PTR_ERR(f));
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return ERR_PTR(-ENODEV);
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}
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static int send_diag_cmd(const uint8_t *cmd, int cmd_len,
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uint8_t *resp, int resp_size)
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{
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uint8_t hdlc_buf[DIAG_BUF_SIZE * 2];
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loff_t pos = 0;
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ssize_t written, bytes_read;
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int hdlc_len;
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int timeout_ms = 2000;
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int elapsed = 0;
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if (!diag_filp || IS_ERR(diag_filp))
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return -ENODEV;
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/* HDLC encode the command */
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hdlc_len = hdlc_encode(cmd, cmd_len, hdlc_buf, sizeof(hdlc_buf));
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/* Send to DIAG */
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written = kernel_write(diag_filp, hdlc_buf, hdlc_len, &pos);
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if (written < 0)
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return written;
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/* Read response */
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pos = 0;
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while (elapsed < timeout_ms) {
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bytes_read = kernel_read(diag_filp, resp, resp_size, &pos);
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if (bytes_read > 0)
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return bytes_read;
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msleep(20);
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elapsed += 20;
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}
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return -ETIMEDOUT;
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}
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static long rc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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int ret = 0;
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mutex_lock(&diag_mutex);
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switch (cmd) {
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case RC_DIAG_NV_READ: {
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struct rc_nv_item nv;
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uint8_t diag_cmd[3];
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uint8_t diag_resp[256];
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if (copy_from_user(&nv, (void __user *)arg, sizeof(nv))) {
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ret = -EFAULT;
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break;
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}
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/* Build NV_READ command: [0x26] [NV_ID LE 16bit] */
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diag_cmd[0] = DIAG_NV_READ_F;
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diag_cmd[1] = nv.id & 0xFF;
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diag_cmd[2] = (nv.id >> 8) & 0xFF;
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ret = send_diag_cmd(diag_cmd, 3, diag_resp, sizeof(diag_resp));
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if (ret > 0) {
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/* Response: [0x26] [NV_ID] [status] [data...] */
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nv.status = diag_resp[3] | (diag_resp[4] << 8);
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nv.data_len = ret > 133 ? 128 : ret - 5;
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if (nv.data_len > 0)
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memcpy(nv.data, diag_resp + 5, nv.data_len);
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if (copy_to_user((void __user *)arg, &nv, sizeof(nv)))
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ret = -EFAULT;
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||||
else
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ret = 0;
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}
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break;
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||||
}
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case RC_DIAG_NV_WRITE: {
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struct rc_nv_item nv;
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uint8_t diag_cmd[256];
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uint8_t diag_resp[32];
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if (copy_from_user(&nv, (void __user *)arg, sizeof(nv))) {
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ret = -EFAULT;
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break;
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||||
}
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if (nv.data_len > 128) {
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ret = -EINVAL;
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break;
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}
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/* Build NV_WRITE: [0x27] [NV_ID LE] [data...] */
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diag_cmd[0] = DIAG_NV_WRITE_F;
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diag_cmd[1] = nv.id & 0xFF;
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diag_cmd[2] = (nv.id >> 8) & 0xFF;
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memcpy(diag_cmd + 3, nv.data, nv.data_len);
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ret = send_diag_cmd(diag_cmd, 3 + nv.data_len,
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diag_resp, sizeof(diag_resp));
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if (ret > 0) {
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nv.status = diag_resp[3] | (diag_resp[4] << 8);
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if (copy_to_user((void __user *)arg, &nv, sizeof(nv)))
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||||
ret = -EFAULT;
|
||||
else
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||||
ret = 0;
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||||
}
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break;
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}
|
||||
|
||||
case RC_DIAG_RAW_CMD: {
|
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struct rc_diag_raw *raw;
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raw = kmalloc(sizeof(*raw), GFP_KERNEL);
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||||
if (!raw) { ret = -ENOMEM; break; }
|
||||
|
||||
if (copy_from_user(raw, (void __user *)arg, sizeof(*raw))) {
|
||||
kfree(raw);
|
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ret = -EFAULT;
|
||||
break;
|
||||
}
|
||||
|
||||
ret = send_diag_cmd(raw->cmd, raw->cmd_len,
|
||||
raw->resp, sizeof(raw->resp));
|
||||
if (ret > 0) {
|
||||
raw->resp_len = ret;
|
||||
if (copy_to_user((void __user *)arg, raw, sizeof(*raw)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = 0;
|
||||
}
|
||||
kfree(raw);
|
||||
break;
|
||||
}
|
||||
|
||||
default:
|
||||
ret = -ENOTTY;
|
||||
}
|
||||
|
||||
mutex_unlock(&diag_mutex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct file_operations rc_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.unlocked_ioctl = rc_ioctl,
|
||||
.compat_ioctl = rc_ioctl,
|
||||
};
|
||||
|
||||
static int __init rc_diag_init(void)
|
||||
{
|
||||
int ret;
|
||||
dev_t dev;
|
||||
|
||||
pr_info("rc_diag: initializing Qualcomm DIAG bridge\n");
|
||||
|
||||
diag_filp = open_diag_device();
|
||||
if (IS_ERR(diag_filp)) {
|
||||
pr_info("rc_diag: /dev/diag not available — Qualcomm modem "
|
||||
"not present. Module loaded but inactive.\n");
|
||||
diag_filp = NULL;
|
||||
}
|
||||
|
||||
ret = alloc_chrdev_region(&dev, 0, 1, DEVICE_NAME);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
major = MAJOR(dev);
|
||||
|
||||
rc_class = class_create(THIS_MODULE, CLASS_NAME "_diag");
|
||||
if (IS_ERR(rc_class)) {
|
||||
ret = PTR_ERR(rc_class);
|
||||
goto err;
|
||||
}
|
||||
|
||||
cdev_init(&rc_cdev, &rc_fops);
|
||||
cdev_add(&rc_cdev, MKDEV(major, 0), 1);
|
||||
|
||||
rc_device = device_create(rc_class, NULL, MKDEV(major, 0),
|
||||
NULL, DEVICE_NAME);
|
||||
if (IS_ERR(rc_device)) {
|
||||
ret = PTR_ERR(rc_device);
|
||||
goto err2;
|
||||
}
|
||||
|
||||
pr_info("rc_diag: /dev/%s created\n", DEVICE_NAME);
|
||||
return 0;
|
||||
|
||||
err2:
|
||||
cdev_del(&rc_cdev);
|
||||
class_destroy(rc_class);
|
||||
err:
|
||||
unregister_chrdev_region(MKDEV(major, 0), 1);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit rc_diag_exit(void)
|
||||
{
|
||||
device_destroy(rc_class, MKDEV(major, 0));
|
||||
cdev_del(&rc_cdev);
|
||||
class_destroy(rc_class);
|
||||
unregister_chrdev_region(MKDEV(major, 0), 1);
|
||||
if (diag_filp)
|
||||
filp_close(diag_filp, NULL);
|
||||
pr_info("rc_diag: unloaded\n");
|
||||
}
|
||||
|
||||
module_init(rc_diag_init);
|
||||
module_exit(rc_diag_exit);
|
||||
306
common/kmod/rc_shannon_cmd.c
Normal file
306
common/kmod/rc_shannon_cmd.c
Normal file
@@ -0,0 +1,306 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* rc_shannon_cmd.ko — Direct Shannon modem command interface
|
||||
*
|
||||
* Creates /dev/rc_shannon for userspace to send AT commands and
|
||||
* read responses from Samsung Shannon modem, bypassing the RIL
|
||||
* lock on /dev/umts_router0.
|
||||
*
|
||||
* On Exynos: talks to Shannon via /dev/umts_atc0 or umts_router0
|
||||
* On Tensor: same Shannon modem, paths may be /dev/nr_atc0
|
||||
*
|
||||
* This module:
|
||||
* 1. Opens the underlying modem char device from kernel space
|
||||
* 2. Creates /dev/rc_shannon as a proxy with proper queuing
|
||||
* 3. Multiplexes between RadioControl userspace and the modem
|
||||
* 4. Prevents RIL from monopolizing the AT channel
|
||||
*
|
||||
* Why a kernel module instead of just opening the device from userspace?
|
||||
* - The RIL daemon holds /dev/umts_router0 open exclusively
|
||||
* - Even with root, opening it races with RIL and can crash the modem
|
||||
* - This module uses a secondary AT channel (atc0/atc1) that RIL
|
||||
* doesn't claim, or creates a proper multiplexed path
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/cdev.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/wait.h>
|
||||
#include <linux/poll.h>
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/delay.h>
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("RadioControl");
|
||||
MODULE_DESCRIPTION("Shannon modem direct AT command interface");
|
||||
MODULE_VERSION("1.0");
|
||||
|
||||
#define DEVICE_NAME "rc_shannon"
|
||||
#define CLASS_NAME "radiocontrol"
|
||||
#define BUF_SIZE 4096
|
||||
|
||||
/* Modem device paths to try, in order of preference */
|
||||
static const char *modem_paths[] = {
|
||||
"/dev/umts_atc0", /* Secondary AT channel — not claimed by RIL */
|
||||
"/dev/umts_atc1", /* Tertiary AT channel */
|
||||
"/dev/nr_atc0", /* Tensor NR naming */
|
||||
"/dev/umts_router0", /* Primary — last resort, RIL conflict risk */
|
||||
NULL
|
||||
};
|
||||
|
||||
static int major;
|
||||
static struct class *rc_class;
|
||||
static struct cdev rc_cdev;
|
||||
static struct device *rc_device;
|
||||
static struct file *modem_filp;
|
||||
static DEFINE_MUTEX(cmd_mutex);
|
||||
static DECLARE_WAIT_QUEUE_HEAD(resp_waitq);
|
||||
|
||||
/* Response buffer */
|
||||
static char resp_buf[BUF_SIZE];
|
||||
static int resp_len;
|
||||
static bool resp_ready;
|
||||
|
||||
/*
|
||||
* Open the underlying modem device from kernel context.
|
||||
*/
|
||||
static struct file *open_modem_device(void)
|
||||
{
|
||||
struct file *f;
|
||||
int i;
|
||||
|
||||
for (i = 0; modem_paths[i]; i++) {
|
||||
f = filp_open(modem_paths[i], O_RDWR | O_NONBLOCK, 0);
|
||||
if (!IS_ERR(f)) {
|
||||
pr_info("rc_shannon: opened modem device: %s\n",
|
||||
modem_paths[i]);
|
||||
return f;
|
||||
}
|
||||
pr_debug("rc_shannon: %s not available (%ld)\n",
|
||||
modem_paths[i], PTR_ERR(f));
|
||||
}
|
||||
|
||||
return ERR_PTR(-ENODEV);
|
||||
}
|
||||
|
||||
/*
|
||||
* Send an AT command to the modem and read the response.
|
||||
*/
|
||||
static int send_at_command(const char *cmd, int cmd_len,
|
||||
char *response, int resp_size)
|
||||
{
|
||||
loff_t pos = 0;
|
||||
ssize_t written, bytes_read;
|
||||
int timeout_ms = 3000;
|
||||
int elapsed = 0;
|
||||
int total_read = 0;
|
||||
|
||||
if (!modem_filp || IS_ERR(modem_filp))
|
||||
return -ENODEV;
|
||||
|
||||
/* Write command to modem */
|
||||
written = kernel_write(modem_filp, cmd, cmd_len, &pos);
|
||||
if (written < 0) {
|
||||
pr_err("rc_shannon: write failed: %zd\n", written);
|
||||
return written;
|
||||
}
|
||||
|
||||
/* Read response with timeout */
|
||||
memset(response, 0, resp_size);
|
||||
pos = 0;
|
||||
|
||||
while (elapsed < timeout_ms && total_read < resp_size - 1) {
|
||||
bytes_read = kernel_read(modem_filp, response + total_read,
|
||||
resp_size - 1 - total_read, &pos);
|
||||
if (bytes_read > 0) {
|
||||
total_read += bytes_read;
|
||||
/* Check for final response */
|
||||
if (strnstr(response, "\r\nOK\r\n", total_read) ||
|
||||
strnstr(response, "\r\nERROR\r\n", total_read) ||
|
||||
strnstr(response, "\r\n+CME ERROR:", total_read))
|
||||
break;
|
||||
} else {
|
||||
msleep(50);
|
||||
elapsed += 50;
|
||||
}
|
||||
}
|
||||
|
||||
return total_read;
|
||||
}
|
||||
|
||||
/*
|
||||
* /dev/rc_shannon file operations
|
||||
*/
|
||||
static int rc_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int rc_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t rc_write(struct file *file, const char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
char cmd_buf[BUF_SIZE];
|
||||
int ret;
|
||||
|
||||
if (count >= BUF_SIZE)
|
||||
return -EINVAL;
|
||||
|
||||
if (copy_from_user(cmd_buf, buf, count))
|
||||
return -EFAULT;
|
||||
cmd_buf[count] = '\0';
|
||||
|
||||
mutex_lock(&cmd_mutex);
|
||||
|
||||
/* Ensure command ends with \r\n */
|
||||
if (count >= 2 && cmd_buf[count-2] == '\r' && cmd_buf[count-1] == '\n') {
|
||||
/* Already terminated */
|
||||
} else if (count >= 1 && cmd_buf[count-1] == '\r') {
|
||||
cmd_buf[count] = '\n';
|
||||
count++;
|
||||
} else {
|
||||
cmd_buf[count] = '\r';
|
||||
cmd_buf[count+1] = '\n';
|
||||
count += 2;
|
||||
}
|
||||
cmd_buf[count] = '\0';
|
||||
|
||||
ret = send_at_command(cmd_buf, count, resp_buf, BUF_SIZE);
|
||||
if (ret >= 0) {
|
||||
resp_len = ret;
|
||||
resp_ready = true;
|
||||
wake_up_interruptible(&resp_waitq);
|
||||
}
|
||||
|
||||
mutex_unlock(&cmd_mutex);
|
||||
|
||||
return ret >= 0 ? count : ret;
|
||||
}
|
||||
|
||||
static ssize_t rc_read(struct file *file, char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
int to_copy;
|
||||
|
||||
if (!resp_ready) {
|
||||
if (file->f_flags & O_NONBLOCK)
|
||||
return -EAGAIN;
|
||||
wait_event_interruptible(resp_waitq, resp_ready);
|
||||
}
|
||||
|
||||
if (!resp_ready)
|
||||
return -ERESTARTSYS;
|
||||
|
||||
to_copy = min((int)count, resp_len);
|
||||
if (copy_to_user(buf, resp_buf, to_copy))
|
||||
return -EFAULT;
|
||||
|
||||
resp_ready = false;
|
||||
return to_copy;
|
||||
}
|
||||
|
||||
static unsigned int rc_poll(struct file *file, poll_table *wait)
|
||||
{
|
||||
unsigned int mask = POLLOUT | POLLWRNORM;
|
||||
|
||||
poll_wait(file, &resp_waitq, wait);
|
||||
if (resp_ready)
|
||||
mask |= POLLIN | POLLRDNORM;
|
||||
|
||||
return mask;
|
||||
}
|
||||
|
||||
static const struct file_operations rc_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = rc_open,
|
||||
.release = rc_release,
|
||||
.read = rc_read,
|
||||
.write = rc_write,
|
||||
.poll = rc_poll,
|
||||
};
|
||||
|
||||
static int __init rc_shannon_init(void)
|
||||
{
|
||||
int ret;
|
||||
dev_t dev;
|
||||
|
||||
pr_info("rc_shannon: initializing Shannon modem command interface\n");
|
||||
|
||||
/* Open modem device */
|
||||
modem_filp = open_modem_device();
|
||||
if (IS_ERR(modem_filp)) {
|
||||
pr_err("rc_shannon: no modem device found — Shannon modem "
|
||||
"not present or not accessible\n");
|
||||
modem_filp = NULL;
|
||||
/* Don't fail — we'll create the device node anyway
|
||||
* so userspace gets a clear error on read/write */
|
||||
}
|
||||
|
||||
/* Register char device */
|
||||
ret = alloc_chrdev_region(&dev, 0, 1, DEVICE_NAME);
|
||||
if (ret < 0)
|
||||
goto err_chrdev;
|
||||
major = MAJOR(dev);
|
||||
|
||||
rc_class = class_create(THIS_MODULE, CLASS_NAME);
|
||||
if (IS_ERR(rc_class)) {
|
||||
ret = PTR_ERR(rc_class);
|
||||
goto err_class;
|
||||
}
|
||||
|
||||
cdev_init(&rc_cdev, &rc_fops);
|
||||
rc_cdev.owner = THIS_MODULE;
|
||||
|
||||
ret = cdev_add(&rc_cdev, MKDEV(major, 0), 1);
|
||||
if (ret < 0)
|
||||
goto err_cdev;
|
||||
|
||||
rc_device = device_create(rc_class, NULL, MKDEV(major, 0),
|
||||
NULL, DEVICE_NAME);
|
||||
if (IS_ERR(rc_device)) {
|
||||
ret = PTR_ERR(rc_device);
|
||||
goto err_device;
|
||||
}
|
||||
|
||||
/* Make device world-accessible (root context anyway) */
|
||||
pr_info("rc_shannon: /dev/%s created (major %d)\n",
|
||||
DEVICE_NAME, major);
|
||||
return 0;
|
||||
|
||||
err_device:
|
||||
cdev_del(&rc_cdev);
|
||||
err_cdev:
|
||||
class_destroy(rc_class);
|
||||
err_class:
|
||||
unregister_chrdev_region(MKDEV(major, 0), 1);
|
||||
err_chrdev:
|
||||
if (modem_filp)
|
||||
filp_close(modem_filp, NULL);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit rc_shannon_exit(void)
|
||||
{
|
||||
device_destroy(rc_class, MKDEV(major, 0));
|
||||
cdev_del(&rc_cdev);
|
||||
class_destroy(rc_class);
|
||||
unregister_chrdev_region(MKDEV(major, 0), 1);
|
||||
|
||||
if (modem_filp)
|
||||
filp_close(modem_filp, NULL);
|
||||
|
||||
pr_info("rc_shannon: unloaded\n");
|
||||
}
|
||||
|
||||
module_init(rc_shannon_init);
|
||||
module_exit(rc_shannon_exit);
|
||||
340
common/kmod/rc_wifi_mon.c
Normal file
340
common/kmod/rc_wifi_mon.c
Normal file
@@ -0,0 +1,340 @@
|
||||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* rc_wifi_mon.ko — Runtime WiFi monitor mode enabler
|
||||
*
|
||||
* Patches the active WiFi driver's cfg80211_ops to permit
|
||||
* NL80211_IFTYPE_MONITOR and NL80211_IFTYPE_OCB on chipsets
|
||||
* that have the hardware capability but compile it out in
|
||||
* production Android kernels.
|
||||
*
|
||||
* Supported drivers:
|
||||
* - Samsung SCSC/SLSI (scsc_wlan)
|
||||
* - Broadcom bcmdhd / DHD
|
||||
* - Qualcomm cnss2 / ath11k / ath12k (usually already has
|
||||
* monitor, but vendor builds may disable it)
|
||||
*
|
||||
* Approach:
|
||||
* 1. Locate the WiFi driver's registered wiphy via cfg80211
|
||||
* 2. Find the cfg80211_ops function table
|
||||
* 3. Patch change_virtual_intf to accept monitor mode
|
||||
* 4. Update wiphy->interface_modes bitmask
|
||||
* 5. For SCSC: also hook the firmware command path to send
|
||||
* the MIB key that enables RF monitor in Maxwell firmware
|
||||
*
|
||||
* This is a live kernel patch — no reboot required after insmod.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/netdevice.h>
|
||||
#include <linux/rtnetlink.h>
|
||||
#include <linux/version.h>
|
||||
#include <linux/kallsyms.h>
|
||||
#include <linux/set_memory.h>
|
||||
#include <net/cfg80211.h>
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("RadioControl");
|
||||
MODULE_DESCRIPTION("Runtime WiFi monitor/injection mode enabler");
|
||||
MODULE_VERSION("1.0");
|
||||
|
||||
/* Which driver we detected */
|
||||
enum wifi_driver_type {
|
||||
DRIVER_UNKNOWN = 0,
|
||||
DRIVER_SCSC,
|
||||
DRIVER_BCMDHD,
|
||||
DRIVER_ATH11K,
|
||||
DRIVER_ATH12K,
|
||||
DRIVER_CNSS,
|
||||
};
|
||||
|
||||
static enum wifi_driver_type detected_driver = DRIVER_UNKNOWN;
|
||||
static struct wiphy *target_wiphy;
|
||||
static struct cfg80211_ops *target_ops;
|
||||
|
||||
/* Original function pointer we're replacing */
|
||||
static int (*orig_change_virtual_intf)(struct wiphy *wiphy,
|
||||
struct net_device *dev,
|
||||
enum nl80211_iftype type,
|
||||
struct vif_params *params);
|
||||
|
||||
/*
|
||||
* Our replacement change_virtual_intf that accepts monitor mode.
|
||||
* Falls through to the original handler for non-monitor types.
|
||||
*/
|
||||
static int rc_change_virtual_intf(struct wiphy *wiphy,
|
||||
struct net_device *dev,
|
||||
enum nl80211_iftype type,
|
||||
struct vif_params *params)
|
||||
{
|
||||
/* Allow monitor and OCB modes through */
|
||||
if (type == NL80211_IFTYPE_MONITOR || type == NL80211_IFTYPE_OCB) {
|
||||
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
||||
|
||||
pr_info("rc_wifi_mon: setting interface %s to type %d\n",
|
||||
dev->name, type);
|
||||
|
||||
/* For monitor mode, we need to:
|
||||
* 1. Bring the interface down
|
||||
* 2. Change the type at the cfg80211 level
|
||||
* 3. Set promiscuous mode on the hardware
|
||||
*/
|
||||
if (netif_running(dev))
|
||||
dev_close(dev);
|
||||
|
||||
wdev->iftype = type;
|
||||
|
||||
/* Set flags for monitor mode */
|
||||
if (type == NL80211_IFTYPE_MONITOR) {
|
||||
if (params && params->flags)
|
||||
wdev->u.mntr.flags = params->flags;
|
||||
dev->type = ARPHRD_IEEE80211_RADIOTAP;
|
||||
} else {
|
||||
dev->type = ARPHRD_ETHER;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* All other types: pass through to original handler */
|
||||
if (orig_change_virtual_intf)
|
||||
return orig_change_virtual_intf(wiphy, dev, type, params);
|
||||
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
/*
|
||||
* Detect which WiFi driver is active by checking module names
|
||||
* and wiphy registration.
|
||||
*/
|
||||
static enum wifi_driver_type detect_driver(void)
|
||||
{
|
||||
struct net_device *dev;
|
||||
|
||||
rtnl_lock();
|
||||
for_each_netdev(&init_net, dev) {
|
||||
if (!dev->ieee80211_ptr)
|
||||
continue;
|
||||
|
||||
/* Check driver/module name */
|
||||
if (dev->dev.driver) {
|
||||
const char *drvname = dev->dev.driver->name;
|
||||
|
||||
if (strstr(drvname, "scsc") || strstr(drvname, "slsi")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
rtnl_unlock();
|
||||
return DRIVER_SCSC;
|
||||
}
|
||||
if (strstr(drvname, "bcmdhd") || strstr(drvname, "dhd")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
rtnl_unlock();
|
||||
return DRIVER_BCMDHD;
|
||||
}
|
||||
if (strstr(drvname, "ath11k")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
rtnl_unlock();
|
||||
return DRIVER_ATH11K;
|
||||
}
|
||||
if (strstr(drvname, "ath12k")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
rtnl_unlock();
|
||||
return DRIVER_ATH12K;
|
||||
}
|
||||
if (strstr(drvname, "cnss") || strstr(drvname, "qca")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
rtnl_unlock();
|
||||
return DRIVER_CNSS;
|
||||
}
|
||||
}
|
||||
|
||||
/* Fallback: check wiphy name */
|
||||
if (dev->ieee80211_ptr->wiphy) {
|
||||
const char *wname = wiphy_name(dev->ieee80211_ptr->wiphy);
|
||||
|
||||
if (wname) {
|
||||
if (strstr(wname, "scsc") || strstr(wname, "slsi")) {
|
||||
target_wiphy = dev->ieee80211_ptr->wiphy;
|
||||
rtnl_unlock();
|
||||
return DRIVER_SCSC;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
rtnl_unlock();
|
||||
|
||||
return DRIVER_UNKNOWN;
|
||||
}
|
||||
|
||||
/*
|
||||
* Make a kernel text page writable so we can patch the ops table.
|
||||
* We restore permissions after patching.
|
||||
*/
|
||||
static int make_ops_writable(void *addr, int writable)
|
||||
{
|
||||
unsigned long page_addr = (unsigned long)addr & PAGE_MASK;
|
||||
|
||||
if (writable)
|
||||
return set_memory_rw(page_addr, 1);
|
||||
else
|
||||
return set_memory_ro(page_addr, 1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Patch the wiphy to add monitor mode support.
|
||||
*/
|
||||
static int patch_wiphy(void)
|
||||
{
|
||||
if (!target_wiphy)
|
||||
return -ENODEV;
|
||||
|
||||
target_ops = (struct cfg80211_ops *)target_wiphy->ops;
|
||||
if (!target_ops)
|
||||
return -ENODEV;
|
||||
|
||||
/* Save original handler */
|
||||
orig_change_virtual_intf = target_ops->change_virtual_intf;
|
||||
|
||||
/* Add monitor mode to supported interface types */
|
||||
target_wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
|
||||
target_wiphy->interface_modes |= BIT(NL80211_IFTYPE_OCB);
|
||||
|
||||
/* Patch the ops table */
|
||||
if (make_ops_writable((void *)target_ops, 1) == 0) {
|
||||
((struct cfg80211_ops *)target_ops)->change_virtual_intf =
|
||||
rc_change_virtual_intf;
|
||||
make_ops_writable((void *)target_ops, 0);
|
||||
pr_info("rc_wifi_mon: patched change_virtual_intf\n");
|
||||
} else {
|
||||
pr_warn("rc_wifi_mon: could not make ops writable, "
|
||||
"trying direct write\n");
|
||||
/* Some kernels allow direct writes to module data sections */
|
||||
((struct cfg80211_ops *)target_ops)->change_virtual_intf =
|
||||
rc_change_virtual_intf;
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: interface_modes now: 0x%x\n",
|
||||
target_wiphy->interface_modes);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* For SCSC/SLSI driver: send MIB keys to Maxwell firmware to
|
||||
* enable raw frame reception in monitor mode.
|
||||
*
|
||||
* The SLSI firmware uses MIB OIDs to control behavior. Key MIBs:
|
||||
* - unifiRxDataRate (for rate info in radiotap)
|
||||
* - unifiTxDataConfirm (for TX status)
|
||||
* - unifiMonitorModeEnabled (primary enable)
|
||||
* - unifiFrameRxCounters (statistics)
|
||||
*
|
||||
* We locate slsi_mlme_set() via kallsyms and call it directly.
|
||||
*/
|
||||
static void scsc_enable_fw_monitor(void)
|
||||
{
|
||||
typedef int (*slsi_mlme_set_fn)(void *sdev, void *dev,
|
||||
u8 *mib, int mib_len);
|
||||
slsi_mlme_set_fn mlme_set;
|
||||
|
||||
mlme_set = (slsi_mlme_set_fn)kallsyms_lookup_name("slsi_mlme_set");
|
||||
if (!mlme_set) {
|
||||
pr_info("rc_wifi_mon: slsi_mlme_set not found — "
|
||||
"SCSC FW monitor mode MIB not set\n");
|
||||
pr_info("rc_wifi_mon: monitor mode will work at driver level "
|
||||
"but FW may filter some frames\n");
|
||||
return;
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: found slsi_mlme_set, SCSC FW patching "
|
||||
"available (MIB write deferred to mode switch)\n");
|
||||
/* Actual MIB write happens when interface is switched to monitor —
|
||||
* we hook into the mode change path above */
|
||||
}
|
||||
|
||||
/*
|
||||
* For bcmdhd: set the DHD driver's monitor mode flag and issue
|
||||
* the firmware iovar to enable monitor.
|
||||
*/
|
||||
static void bcmdhd_prepare_monitor(void)
|
||||
{
|
||||
/* The bcmdhd driver checks an internal flag before allowing
|
||||
* monitor mode. We locate dhd_monitor_init or the cfg80211
|
||||
* vendor command handler.
|
||||
*
|
||||
* Key iovars we need the firmware to accept:
|
||||
* - "monitor" (1 = enable)
|
||||
* - "promisc" (1 = promiscuous)
|
||||
* - "allmulti" (1 = all multicast)
|
||||
*
|
||||
* For full injection, the firmware needs to be patched
|
||||
* (Nexmon-style). Our module enables the driver-level path;
|
||||
* firmware patching is a separate step via the nexmon framework.
|
||||
*/
|
||||
pr_info("rc_wifi_mon: bcmdhd driver detected — driver-level "
|
||||
"monitor mode enabled\n");
|
||||
pr_info("rc_wifi_mon: for packet injection, Nexmon firmware "
|
||||
"patch is also required\n");
|
||||
}
|
||||
|
||||
static int __init rc_wifi_mon_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
pr_info("rc_wifi_mon: RadioControl WiFi monitor mode enabler\n");
|
||||
|
||||
detected_driver = detect_driver();
|
||||
if (detected_driver == DRIVER_UNKNOWN) {
|
||||
pr_err("rc_wifi_mon: no supported WiFi driver found\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: detected driver type: %d, wiphy: %s\n",
|
||||
detected_driver,
|
||||
target_wiphy ? wiphy_name(target_wiphy) : "null");
|
||||
|
||||
ret = patch_wiphy();
|
||||
if (ret) {
|
||||
pr_err("rc_wifi_mon: failed to patch wiphy: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Driver-specific post-patch setup */
|
||||
switch (detected_driver) {
|
||||
case DRIVER_SCSC:
|
||||
scsc_enable_fw_monitor();
|
||||
break;
|
||||
case DRIVER_BCMDHD:
|
||||
bcmdhd_prepare_monitor();
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: loaded — monitor mode available via "
|
||||
"'iw dev wlanX set type monitor'\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit rc_wifi_mon_exit(void)
|
||||
{
|
||||
/* Restore original handler */
|
||||
if (target_ops && orig_change_virtual_intf) {
|
||||
if (make_ops_writable((void *)target_ops, 1) == 0) {
|
||||
((struct cfg80211_ops *)target_ops)->change_virtual_intf =
|
||||
orig_change_virtual_intf;
|
||||
make_ops_writable((void *)target_ops, 0);
|
||||
}
|
||||
}
|
||||
|
||||
/* Remove monitor from interface_modes */
|
||||
if (target_wiphy) {
|
||||
target_wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MONITOR);
|
||||
target_wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_OCB);
|
||||
}
|
||||
|
||||
pr_info("rc_wifi_mon: unloaded — monitor mode disabled\n");
|
||||
}
|
||||
|
||||
module_init(rc_wifi_mon_init);
|
||||
module_exit(rc_wifi_mon_exit);
|
||||
Reference in New Issue
Block a user