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rUv
915943cef4
* feat: add MAC address filter for ESP32 CSI collection In multi-AP environments, CSI frames from different access points get mixed together, corrupting the sensing signal. Add transmitter MAC filtering so only frames from a specified AP are processed. Implementation: - csi_collector: filter in wifi_csi_callback by comparing info->mac against configured MAC; log transmitter MAC in periodic debug output - csi_collector_set_filter_mac(): runtime API to enable/disable filter - Kconfig: CSI_FILTER_MAC option (format "AA:BB:CC:DD:EE:FF") - NVS: "filter_mac" 6-byte blob overrides Kconfig at runtime - nvs_config: parse Kconfig MAC string at boot, load NVS override - main: apply filter from config after csi_collector_init() When no filter is configured (default), behavior is unchanged — all transmitter MACs are accepted for backward compatibility. Fixes #98 Co-Authored-By: claude-flow <ruv@ruv.net> * chore: add CLAUDE.local.md to .gitignore Local machine configuration (ESP-IDF paths, COM port, build instructions) should not be committed to the repository. Co-Authored-By: claude-flow <ruv@ruv.net>
101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/**
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* @file csi_collector.h
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* @brief CSI data collection and ADR-018 binary frame serialization.
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*/
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#ifndef CSI_COLLECTOR_H
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#define CSI_COLLECTOR_H
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#include <stdint.h>
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#include <stddef.h>
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#include "esp_wifi_types.h"
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/** ADR-018 magic number. */
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#define CSI_MAGIC 0xC5110001
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/** ADR-018 header size in bytes. */
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#define CSI_HEADER_SIZE 20
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/** Maximum frame buffer size (header + 4 antennas * 256 subcarriers * 2 bytes). */
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#define CSI_MAX_FRAME_SIZE (CSI_HEADER_SIZE + 4 * 256 * 2)
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/** Maximum number of channels in the hop table (ADR-029). */
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#define CSI_HOP_CHANNELS_MAX 6
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/** Length of a MAC address in bytes. */
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#define CSI_MAC_LEN 6
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/**
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* Initialize CSI collection.
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* Registers the WiFi CSI callback.
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*/
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void csi_collector_init(void);
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/**
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* Set a MAC address filter for CSI collection.
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*
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* When set, only CSI frames from the specified transmitter MAC are processed;
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* all others are silently dropped. This prevents signal mixing in multi-AP
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* environments.
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*
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* Pass NULL to disable filtering (accept CSI from all transmitters).
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*
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* @param mac 6-byte MAC address to accept, or NULL to disable filtering.
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*/
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void csi_collector_set_filter_mac(const uint8_t *mac);
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/**
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* Serialize CSI data into ADR-018 binary frame format.
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*
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* @param info WiFi CSI info from the ESP-IDF callback.
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* @param buf Output buffer (must be at least CSI_MAX_FRAME_SIZE bytes).
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* @param buf_len Size of the output buffer.
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* @return Number of bytes written, or 0 on error.
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*/
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size_t csi_serialize_frame(const wifi_csi_info_t *info, uint8_t *buf, size_t buf_len);
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/**
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* Configure the channel-hop table for multi-band sensing (ADR-029).
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*
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* When hop_count == 1 the collector stays on the single configured channel
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* (backward-compatible with the original single-channel mode).
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*
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* @param channels Array of WiFi channel numbers (1-14 for 2.4 GHz, 36-177 for 5 GHz).
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* @param hop_count Number of entries in the channels array (1..CSI_HOP_CHANNELS_MAX).
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* @param dwell_ms Dwell time per channel in milliseconds (>= 10).
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*/
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void csi_collector_set_hop_table(const uint8_t *channels, uint8_t hop_count, uint32_t dwell_ms);
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/**
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* Advance to the next channel in the hop table.
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*
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* Called by the hop timer callback. If hop_count <= 1 this is a no-op.
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* Calls esp_wifi_set_channel() internally.
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*/
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void csi_hop_next_channel(void);
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/**
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* Start the channel-hop timer.
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*
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* Creates an esp_timer periodic callback that fires every dwell_ms
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* milliseconds, calling csi_hop_next_channel(). If hop_count <= 1
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* the timer is not started (single-channel backward-compatible mode).
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*/
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void csi_collector_start_hop_timer(void);
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/**
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* Inject an NDP (Null Data Packet) frame for sensing.
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*
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* Uses esp_wifi_80211_tx() to send a preamble-only frame (~24 us airtime)
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* that triggers CSI measurement at all receivers. This is the "sensing-first"
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* TX mechanism described in ADR-029.
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*
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* @return ESP_OK on success, or an error code.
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*
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* @note TODO: Full NDP frame construction. Currently sends a minimal
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* null-data frame as a placeholder.
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*/
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esp_err_t csi_inject_ndp_frame(void);
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#endif /* CSI_COLLECTOR_H */
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