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Clamp position precision on public / known-keys (#10665)

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* Clamp position precision on public / known-keys (Compliance)

* Fix review comments: bounds check, all-channel precision clamp, disabled channel guard

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Refactor position precision comments for clarity and update channel configuration handling in AdminModule

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Ben Meadors
2026-06-14 18:53:18 -05:00
committed by GitHub
co-authored by Copilot Autofix powered by AI copilot-swe-agent[bot]
parent 8a0c7592cc
commit d878c81ce8
7 changed files with 180 additions and 1 deletions
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src/mesh/PositionPrecision.h
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@@ -4,7 +4,16 @@
#include "meshtastic/mesh.pb.h"
#include <stdint.h>
// Max precision on a publicly-decryptable channel. CCPA "precise geolocation" = within a ~564m (1,850ft) radius.
// Precision is bit-truncation of latitude_i/longitude_i: the latitude cell stays ~constant in meters worldwide
// (~700m at 15 bits), while only the longitude cell varies — widest at the equator, narrowing toward the poles.
// 15 also matches the MQTT map-report public precision ceiling.
#define MAX_POSITION_PRECISION_PUBLIC_KEY 15
// Configured precision as-is; does NOT apply the public-key clamp -- use the channelIndex overload for the on-wire value.
uint32_t getPositionPrecisionForChannel(const meshtastic_Channel &channel);
// Configured precision, clamped to MAX_POSITION_PRECISION_PUBLIC_KEY when the channel's effective key is publicly decryptable.
uint32_t getPositionPrecisionForChannel(uint8_t channelIndex);
void applyPositionPrecision(meshtastic_Position &position, uint32_t precision);
bool applyPositionPrecision(meshtastic_MeshPacket &packet, uint32_t precision);