vsock_service_config/
vsock_service_config_rust_config_lib_source.rs

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1use fidl::unpersist;
2use fidl_cf_sc_internal_vsockserviceconfig::Config as FidlConfig;
3use fuchsia_inspect::Node;
4use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
5#[derive(Debug)]
6pub struct Config {
7    pub guest_to_host_supported: bool,
8    pub loopback_supported: bool,
9}
10impl Config {
11    pub fn take_from_startup_handle() -> Self {
12        let config_vmo: zx::Vmo =
13            take_startup_handle(HandleInfo::new(HandleType::ComponentConfigVmo, 0))
14                .expect("Config VMO handle must be provided and cannot already have been taken.")
15                .into();
16        let config_size =
17            config_vmo.get_content_size().expect("must be able to read config vmo content size");
18        assert_ne!(config_size, 0, "config vmo must be non-empty");
19        let config_bytes =
20            config_vmo.read_to_vec(0, config_size).expect("must be able to read config vmo");
21        let checksum_length = u16::from_le_bytes([config_bytes[0], config_bytes[1]]) as usize;
22        let fidl_start = 2 + checksum_length;
23        let observed_checksum = &config_bytes[2..fidl_start];
24        let expected_checksum = vec![
25            0xc0, 0x8e, 0xcc, 0x50, 0xce, 0x45, 0x9d, 0xc9, 0x44, 0x27, 0x6d, 0x69, 0x69, 0x6a,
26            0x9f, 0xd5, 0x9a, 0x1d, 0x83, 0x71, 0xf9, 0x8e, 0x7b, 0xa3, 0xcb, 0x37, 0x93, 0x8f,
27            0x0b, 0x3c, 0xbd, 0x95,
28        ];
29        assert_eq!(
30            observed_checksum, expected_checksum,
31            "checksum from config VMO does not match expected checksum"
32        );
33        let fidl_config: FidlConfig = unpersist(&config_bytes[fidl_start..])
34            .expect("must be able to parse bytes as config FIDL");
35        Self {
36            guest_to_host_supported: fidl_config.guest_to_host_supported,
37            loopback_supported: fidl_config.loopback_supported,
38        }
39    }
40    pub fn record_inspect(&self, inspector_node: &Node) {
41        inspector_node.record_bool("guest_to_host_supported", self.guest_to_host_supported);
42        inspector_node.record_bool("loopback_supported", self.loopback_supported);
43    }
44}
vsock_service_config/vsock_service_config_rust_config_lib_source.rs

vsock_service_config/
vsock_service_config_rust_config_lib_source.rs
