fastpair_provider_config/
fastpair_provider_config_rust_config_lib_source.rs

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1use fidl::unpersist;
2use fidl_cf_sc_internal_fastpairproviderconfig::Config as FidlConfig;
3use fuchsia_inspect::Node;
4use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
5#[derive(Debug)]
6pub struct Config {
7    pub firmware_revision: String,
8    pub model_id: u32,
9    pub private_key: String,
10}
11impl Config {
12    pub fn take_from_startup_handle() -> Self {
13        let config_vmo: zx::Vmo =
14            take_startup_handle(HandleInfo::new(HandleType::ComponentConfigVmo, 0))
15                .expect("Config VMO handle must be provided and cannot already have been taken.")
16                .into();
17        let config_size =
18            config_vmo.get_content_size().expect("must be able to read config vmo content size");
19        assert_ne!(config_size, 0, "config vmo must be non-empty");
20        let config_bytes =
21            config_vmo.read_to_vec(0, config_size).expect("must be able to read config vmo");
22        let checksum_length = u16::from_le_bytes([config_bytes[0], config_bytes[1]]) as usize;
23        let fidl_start = 2 + checksum_length;
24        let observed_checksum = &config_bytes[2..fidl_start];
25        let expected_checksum = vec![
26            0x02, 0x2c, 0xa3, 0x90, 0x02, 0x7d, 0x16, 0x4a, 0x52, 0x3c, 0x84, 0xef, 0xfa, 0x9a,
27            0xf6, 0xa0, 0x65, 0x19, 0xfa, 0x44, 0x07, 0xcf, 0x11, 0x61, 0x70, 0x5b, 0x7c, 0x2a,
28            0x07, 0xe9, 0x1c, 0x49,
29        ];
30        assert_eq!(
31            observed_checksum, expected_checksum,
32            "checksum from config VMO does not match expected checksum"
33        );
34        let fidl_config: FidlConfig = unpersist(&config_bytes[fidl_start..])
35            .expect("must be able to parse bytes as config FIDL");
36        Self {
37            firmware_revision: fidl_config.firmware_revision,
38            model_id: fidl_config.model_id,
39            private_key: fidl_config.private_key,
40        }
41    }
42    pub fn record_inspect(&self, inspector_node: &Node) {
43        inspector_node.record_string("firmware_revision", &self.firmware_revision);
44        inspector_node.record_uint("model_id", self.model_id as u64);
45        inspector_node.record_string("private_key", &self.private_key);
46    }
47}
fastpair_provider_config/fastpair_provider_config_rust_config_lib_source.rs

fastpair_provider_config/
fastpair_provider_config_rust_config_lib_source.rs
