session_manager_config/
session_manager_config_rust_config_lib_source.rs

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1use fidl::unpersist;
2use fidl_cf_sc_internal_sessionmanagerconfig::Config as FidlConfig;
3use fuchsia_inspect::Node;
4use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
5#[derive(Debug)]
6pub struct Config {
7    pub autolaunch: bool,
8    pub session_url: String,
9    pub suspend_enabled: bool,
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            0xd7, 0x0f, 0x8b, 0x49, 0x3a, 0xd0, 0xea, 0x30, 0x79, 0x81, 0x0c, 0x1f, 0x69, 0x52,
27            0xdd, 0xb1, 0x38, 0x84, 0x29, 0xc1, 0x66, 0x04, 0x87, 0xee, 0xc1, 0x73, 0x8d, 0x9d,
28            0xbe, 0x6a, 0xd4, 0xc5,
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            autolaunch: fidl_config.autolaunch,
38            session_url: fidl_config.session_url,
39            suspend_enabled: fidl_config.suspend_enabled,
40        }
41    }
42    pub fn record_inspect(&self, inspector_node: &Node) {
43        inspector_node.record_bool("autolaunch", self.autolaunch);
44        inspector_node.record_string("session_url", &self.session_url);
45        inspector_node.record_bool("suspend_enabled", self.suspend_enabled);
46    }
47}
session_manager_config/session_manager_config_rust_config_lib_source.rs

session_manager_config/
session_manager_config_rust_config_lib_source.rs
