1use fidl::unpersist;
2use fidl_cf_sc_internal_receiverconfig::Config as FidlConfig;
3use fuchsia_inspect::{ArithmeticArrayProperty, ArrayProperty, Node};
4use fuchsia_runtime::{take_startup_handle, HandleInfo, HandleType};
5use std::convert::TryInto;
6const EXPECTED_CHECKSUM: &[u8] = &[
7 0xcd, 0x57, 0xb2, 0xa2, 0x89, 0xbb, 0xb6, 0x11, 0xcf, 0x81, 0x50, 0xec, 0x06, 0xc5, 0x06, 0x4c,
8 0x7c, 0xae, 0x79, 0x0f, 0xaa, 0x73, 0x0b, 0x6f, 0xa1, 0x02, 0xc3, 0x53, 0x7b, 0x94, 0xee, 0x1a,
9];
10#[derive(Debug)]
11pub struct Config {
12 pub my_flag: bool,
13 pub my_int16: i16,
14 pub my_int32: i32,
15 pub my_int64: i64,
16 pub my_int8: i8,
17 pub my_string: String,
18 pub my_uint16: u16,
19 pub my_uint32: u32,
20 pub my_uint64: u64,
21 pub my_uint8: u8,
22 pub my_vector_of_flag: Vec<bool>,
23 pub my_vector_of_int16: Vec<i16>,
24 pub my_vector_of_int32: Vec<i32>,
25 pub my_vector_of_int64: Vec<i64>,
26 pub my_vector_of_int8: Vec<i8>,
27 pub my_vector_of_string: Vec<String>,
28 pub my_vector_of_uint16: Vec<u16>,
29 pub my_vector_of_uint32: Vec<u32>,
30 pub my_vector_of_uint64: Vec<u64>,
31 pub my_vector_of_uint8: Vec<u8>,
32}
33impl Config {
34 #[doc = r" Take the config startup handle and parse its contents."]
35 #[doc = r""]
36 #[doc = r" # Panics"]
37 #[doc = r""]
38 #[doc = r" If the config startup handle was already taken or if it is not valid."]
39 pub fn take_from_startup_handle() -> Self {
40 let handle_info = HandleInfo::new(HandleType::ComponentConfigVmo, 0);
41 let config_vmo: zx::Vmo =
42 take_startup_handle(handle_info).expect("Config VMO handle must be present.").into();
43 Self::from_vmo(&config_vmo).expect("Config VMO handle must be valid.")
44 }
45 #[doc = r" Parse `Self` from `vmo`."]
46 pub fn from_vmo(vmo: &zx::Vmo) -> Result<Self, Error> {
47 let config_size = vmo.get_content_size().map_err(Error::GettingContentSize)?;
48 let config_bytes = vmo.read_to_vec(0, config_size).map_err(Error::ReadingConfigBytes)?;
49 Self::from_bytes(&config_bytes)
50 }
51 #[doc = r" Parse `Self` from `bytes`."]
52 pub fn from_bytes(bytes: &[u8]) -> Result<Self, Error> {
53 let (checksum_len_bytes, bytes) = bytes.split_at_checked(2).ok_or(Error::TooFewBytes)?;
54 let checksum_len_bytes: [u8; 2] =
55 checksum_len_bytes.try_into().expect("previous call guaranteed 2 element slice");
56 let checksum_length = u16::from_le_bytes(checksum_len_bytes) as usize;
57 let (observed_checksum, bytes) =
58 bytes.split_at_checked(checksum_length).ok_or(Error::TooFewBytes)?;
59 if observed_checksum != EXPECTED_CHECKSUM {
60 return Err(Error::ChecksumMismatch { observed_checksum: observed_checksum.to_vec() });
61 }
62 let fidl_config: FidlConfig = unpersist(bytes).map_err(Error::Unpersist)?;
63 Ok(Self {
64 my_flag: fidl_config.my_flag,
65 my_int16: fidl_config.my_int16,
66 my_int32: fidl_config.my_int32,
67 my_int64: fidl_config.my_int64,
68 my_int8: fidl_config.my_int8,
69 my_string: fidl_config.my_string,
70 my_uint16: fidl_config.my_uint16,
71 my_uint32: fidl_config.my_uint32,
72 my_uint64: fidl_config.my_uint64,
73 my_uint8: fidl_config.my_uint8,
74 my_vector_of_flag: fidl_config.my_vector_of_flag,
75 my_vector_of_int16: fidl_config.my_vector_of_int16,
76 my_vector_of_int32: fidl_config.my_vector_of_int32,
77 my_vector_of_int64: fidl_config.my_vector_of_int64,
78 my_vector_of_int8: fidl_config.my_vector_of_int8,
79 my_vector_of_string: fidl_config.my_vector_of_string,
80 my_vector_of_uint16: fidl_config.my_vector_of_uint16,
81 my_vector_of_uint32: fidl_config.my_vector_of_uint32,
82 my_vector_of_uint64: fidl_config.my_vector_of_uint64,
83 my_vector_of_uint8: fidl_config.my_vector_of_uint8,
84 })
85 }
86 pub fn record_inspect(&self, inspector_node: &Node) {
87 inspector_node.record_bool("my_flag", self.my_flag);
88 inspector_node.record_int("my_int16", self.my_int16 as i64);
89 inspector_node.record_int("my_int32", self.my_int32 as i64);
90 inspector_node.record_int("my_int64", self.my_int64);
91 inspector_node.record_int("my_int8", self.my_int8 as i64);
92 inspector_node.record_string("my_string", &self.my_string);
93 inspector_node.record_uint("my_uint16", self.my_uint16 as u64);
94 inspector_node.record_uint("my_uint32", self.my_uint32 as u64);
95 inspector_node.record_uint("my_uint64", self.my_uint64);
96 inspector_node.record_uint("my_uint8", self.my_uint8 as u64);
97 let arr =
98 inspector_node.create_uint_array("my_vector_of_flag", self.my_vector_of_flag.len());
99 for i in 0..self.my_vector_of_flag.len() {
100 arr.add(i, self.my_vector_of_flag[i] as u64);
101 }
102 inspector_node.record(arr);
103 let arr =
104 inspector_node.create_int_array("my_vector_of_int16", self.my_vector_of_int16.len());
105 for i in 0..self.my_vector_of_int16.len() {
106 arr.add(i, self.my_vector_of_int16[i] as i64);
107 }
108 inspector_node.record(arr);
109 let arr =
110 inspector_node.create_int_array("my_vector_of_int32", self.my_vector_of_int32.len());
111 for i in 0..self.my_vector_of_int32.len() {
112 arr.add(i, self.my_vector_of_int32[i] as i64);
113 }
114 inspector_node.record(arr);
115 let arr =
116 inspector_node.create_int_array("my_vector_of_int64", self.my_vector_of_int64.len());
117 for i in 0..self.my_vector_of_int64.len() {
118 arr.add(i, self.my_vector_of_int64[i]);
119 }
120 inspector_node.record(arr);
121 let arr =
122 inspector_node.create_int_array("my_vector_of_int8", self.my_vector_of_int8.len());
123 for i in 0..self.my_vector_of_int8.len() {
124 arr.add(i, self.my_vector_of_int8[i] as i64);
125 }
126 inspector_node.record(arr);
127 let arr = inspector_node
128 .create_string_array("my_vector_of_string", self.my_vector_of_string.len());
129 for i in 0..self.my_vector_of_string.len() {
130 arr.set(i, &self.my_vector_of_string[i]);
131 }
132 inspector_node.record(arr);
133 let arr =
134 inspector_node.create_uint_array("my_vector_of_uint16", self.my_vector_of_uint16.len());
135 for i in 0..self.my_vector_of_uint16.len() {
136 arr.add(i, self.my_vector_of_uint16[i] as u64);
137 }
138 inspector_node.record(arr);
139 let arr =
140 inspector_node.create_uint_array("my_vector_of_uint32", self.my_vector_of_uint32.len());
141 for i in 0..self.my_vector_of_uint32.len() {
142 arr.add(i, self.my_vector_of_uint32[i] as u64);
143 }
144 inspector_node.record(arr);
145 let arr =
146 inspector_node.create_uint_array("my_vector_of_uint64", self.my_vector_of_uint64.len());
147 for i in 0..self.my_vector_of_uint64.len() {
148 arr.add(i, self.my_vector_of_uint64[i]);
149 }
150 inspector_node.record(arr);
151 let arr =
152 inspector_node.create_uint_array("my_vector_of_uint8", self.my_vector_of_uint8.len());
153 for i in 0..self.my_vector_of_uint8.len() {
154 arr.add(i, self.my_vector_of_uint8[i] as u64);
155 }
156 inspector_node.record(arr);
157 }
158}
159#[derive(Debug)]
160pub enum Error {
161 #[doc = r" Failed to read the content size of the VMO."]
162 GettingContentSize(zx::Status),
163 #[doc = r" Failed to read the content of the VMO."]
164 ReadingConfigBytes(zx::Status),
165 #[doc = r" The VMO was too small for this config library."]
166 TooFewBytes,
167 #[doc = r" The VMO's config ABI checksum did not match this library's."]
168 ChecksumMismatch { observed_checksum: Vec<u8> },
169 #[doc = r" Failed to parse the non-checksum bytes of the VMO as this library's FIDL type."]
170 Unpersist(fidl::Error),
171}
172impl std::fmt::Display for Error {
173 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
174 match self {
175 Self::GettingContentSize(status) => {
176 write!(f, "Failed to get content size: {status}")
177 }
178 Self::ReadingConfigBytes(status) => {
179 write!(f, "Failed to read VMO content: {status}")
180 }
181 Self::TooFewBytes => {
182 write!(f, "VMO content is not large enough for this config library.")
183 }
184 Self::ChecksumMismatch { observed_checksum } => {
185 write!(
186 f,
187 "ABI checksum mismatch, expected {:?}, got {:?}",
188 EXPECTED_CHECKSUM, observed_checksum,
189 )
190 }
191 Self::Unpersist(fidl_error) => {
192 write!(f, "Failed to parse contents of config VMO: {fidl_error}")
193 }
194 }
195 }
196}
197impl std::error::Error for Error {
198 #[allow(unused_parens, reason = "rustfmt errors without parens here")]
199 fn source(&self) -> Option<(&'_ (dyn std::error::Error + 'static))> {
200 match self {
201 Self::GettingContentSize(ref status) | Self::ReadingConfigBytes(ref status) => {
202 Some(status)
203 }
204 Self::TooFewBytes => None,
205 Self::ChecksumMismatch { .. } => None,
206 Self::Unpersist(ref fidl_error) => Some(fidl_error),
207 }
208 }
209 fn description(&self) -> &str {
210 match self {
211 Self::GettingContentSize(_) => "getting content size",
212 Self::ReadingConfigBytes(_) => "reading VMO contents",
213 Self::TooFewBytes => "VMO contents too small",
214 Self::ChecksumMismatch { .. } => "ABI checksum mismatch",
215 Self::Unpersist(_) => "FIDL parsing error",
216 }
217 }
218}