ns3_config/
config_lib_rust_config_lib_source.rs

Help
1use fidl::unpersist;
2use fidl_cf_sc_internal_ns3config::Config as FidlConfig;
3use fuchsia_inspect::Node;
4use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
5#[derive(Debug)]
6pub struct Config {
7    pub debug_logs: bool,
8    pub num_threads: u8,
9    pub opaque_iids: bool,
10    pub suspend_enabled: bool,
11}
12impl Config {
13    pub fn take_from_startup_handle() -> Self {
14        let config_vmo: zx::Vmo =
15            take_startup_handle(HandleInfo::new(HandleType::ComponentConfigVmo, 0))
16                .expect("Config VMO handle must be provided and cannot already have been taken.")
17                .into();
18        let config_size =
19            config_vmo.get_content_size().expect("must be able to read config vmo content size");
20        assert_ne!(config_size, 0, "config vmo must be non-empty");
21        let config_bytes =
22            config_vmo.read_to_vec(0, config_size).expect("must be able to read config vmo");
23        let checksum_length = u16::from_le_bytes([config_bytes[0], config_bytes[1]]) as usize;
24        let fidl_start = 2 + checksum_length;
25        let observed_checksum = &config_bytes[2..fidl_start];
26        let expected_checksum = vec![
27            0x1d, 0xa6, 0xb4, 0xe2, 0xe3, 0xab, 0x9c, 0x6e, 0xdb, 0x49, 0x2f, 0x8e, 0xe1, 0xff,
28            0xe2, 0x2b, 0x3d, 0xd6, 0x4c, 0xda, 0x7c, 0xd7, 0x77, 0x92, 0x12, 0xa2, 0x8d, 0xdc,
29            0x82, 0x57, 0x8e, 0xa1,
30        ];
31        assert_eq!(
32            observed_checksum, expected_checksum,
33            "checksum from config VMO does not match expected checksum"
34        );
35        let fidl_config: FidlConfig = unpersist(&config_bytes[fidl_start..])
36            .expect("must be able to parse bytes as config FIDL");
37        Self {
38            debug_logs: fidl_config.debug_logs,
39            num_threads: fidl_config.num_threads,
40            opaque_iids: fidl_config.opaque_iids,
41            suspend_enabled: fidl_config.suspend_enabled,
42        }
43    }
44    pub fn record_inspect(&self, inspector_node: &Node) {
45        inspector_node.record_bool("debug_logs", self.debug_logs);
46        inspector_node.record_uint("num_threads", self.num_threads as u64);
47        inspector_node.record_bool("opaque_iids", self.opaque_iids);
48        inspector_node.record_bool("suspend_enabled", self.suspend_enabled);
49    }
50}
ns3_config/config_lib_rust_config_lib_source.rs

ns3_config/
config_lib_rust_config_lib_source.rs
