httpsdate_config/
httpsdate_config_rust_config_lib_source.rs

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1use fidl::unpersist;
2use fidl_cf_sc_internal_httpsdateconfig::Config as FidlConfig;
3use fuchsia_inspect::Node;
4use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
5#[derive(Debug)]
6pub struct Config {
7    pub first_rtt_time_factor: u16,
8    pub https_timeout_sec: u8,
9    pub max_attempts_urgency_high: u32,
10    pub max_attempts_urgency_low: u32,
11    pub max_attempts_urgency_medium: u32,
12    pub num_polls_urgency_high: u32,
13    pub num_polls_urgency_low: u32,
14    pub num_polls_urgency_medium: u32,
15    pub standard_deviation_bound_percentage: u8,
16    pub time_source_endpoint_url: String,
17    pub use_pull_api: bool,
18}
19impl Config {
20    pub fn take_from_startup_handle() -> Self {
21        let config_vmo: zx::Vmo =
22            take_startup_handle(HandleInfo::new(HandleType::ComponentConfigVmo, 0))
23                .expect("Config VMO handle must be provided and cannot already have been taken.")
24                .into();
25        let config_size =
26            config_vmo.get_content_size().expect("must be able to read config vmo content size");
27        assert_ne!(config_size, 0, "config vmo must be non-empty");
28        let config_bytes =
29            config_vmo.read_to_vec(0, config_size).expect("must be able to read config vmo");
30        let checksum_length = u16::from_le_bytes([config_bytes[0], config_bytes[1]]) as usize;
31        let fidl_start = 2 + checksum_length;
32        let observed_checksum = &config_bytes[2..fidl_start];
33        let expected_checksum = vec![
34            0x47, 0x9d, 0xa0, 0xef, 0x6a, 0xf6, 0xb8, 0xac, 0x91, 0xd9, 0x20, 0xb6, 0xe9, 0x78,
35            0x94, 0xb6, 0x0a, 0xbf, 0x2c, 0x4f, 0x88, 0x4e, 0xa1, 0xdc, 0x15, 0x86, 0xae, 0x9e,
36            0x97, 0x2f, 0x1c, 0x6f,
37        ];
38        assert_eq!(
39            observed_checksum, expected_checksum,
40            "checksum from config VMO does not match expected checksum"
41        );
42        let fidl_config: FidlConfig = unpersist(&config_bytes[fidl_start..])
43            .expect("must be able to parse bytes as config FIDL");
44        Self {
45            first_rtt_time_factor: fidl_config.first_rtt_time_factor,
46            https_timeout_sec: fidl_config.https_timeout_sec,
47            max_attempts_urgency_high: fidl_config.max_attempts_urgency_high,
48            max_attempts_urgency_low: fidl_config.max_attempts_urgency_low,
49            max_attempts_urgency_medium: fidl_config.max_attempts_urgency_medium,
50            num_polls_urgency_high: fidl_config.num_polls_urgency_high,
51            num_polls_urgency_low: fidl_config.num_polls_urgency_low,
52            num_polls_urgency_medium: fidl_config.num_polls_urgency_medium,
53            standard_deviation_bound_percentage: fidl_config.standard_deviation_bound_percentage,
54            time_source_endpoint_url: fidl_config.time_source_endpoint_url,
55            use_pull_api: fidl_config.use_pull_api,
56        }
57    }
58    pub fn record_inspect(&self, inspector_node: &Node) {
59        inspector_node.record_uint("first_rtt_time_factor", self.first_rtt_time_factor as u64);
60        inspector_node.record_uint("https_timeout_sec", self.https_timeout_sec as u64);
61        inspector_node
62            .record_uint("max_attempts_urgency_high", self.max_attempts_urgency_high as u64);
63        inspector_node
64            .record_uint("max_attempts_urgency_low", self.max_attempts_urgency_low as u64);
65        inspector_node
66            .record_uint("max_attempts_urgency_medium", self.max_attempts_urgency_medium as u64);
67        inspector_node.record_uint("num_polls_urgency_high", self.num_polls_urgency_high as u64);
68        inspector_node.record_uint("num_polls_urgency_low", self.num_polls_urgency_low as u64);
69        inspector_node
70            .record_uint("num_polls_urgency_medium", self.num_polls_urgency_medium as u64);
71        inspector_node.record_uint(
72            "standard_deviation_bound_percentage",
73            self.standard_deviation_bound_percentage as u64,
74        );
75        inspector_node.record_string("time_source_endpoint_url", &self.time_source_endpoint_url);
76        inspector_node.record_bool("use_pull_api", self.use_pull_api);
77    }
78}
httpsdate_config/httpsdate_config_rust_config_lib_source.rs

httpsdate_config/
httpsdate_config_rust_config_lib_source.rs
