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Dominic Grimm 2024-11-14 20:44:02 +01:00
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/target

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Cargo.toml Normal file
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[package]
name = "openlipc_dyn"
version = "0.1.0"
authors = ["Dominic Grimm <dominic@dergrimm.net>"]
edition = "2021"
[dependencies]
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dlopen = "0.1.8"
dlopen_derive = "0.1.4"

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use anyhow::{bail, Result};
use dlopen::wrapper::{Container, WrapperApi};
use dlopen_derive::WrapperApi;
use std::ffi::{CStr, CString};
use std::os::raw::{c_char, c_int, c_uint, c_void};
type LipcType = c_void;
type LipcCode = c_uint;
const LIPC_CODE_LIPC_OK: LipcCode = 0;
// const LIPC_CODE_LIPC_ERROR_UNKNOWN: LIPCcode = 1;
// const LIPC_CODE_LIPC_ERROR_INTERNAL: LIPCcode = 2;
// const LIPC_CODE_LIPC_ERROR_NO_SUCH_SOURCE: LIPCcode = 3;
// const LIPC_CODE_LIPC_ERROR_OPERATION_NOT_SUPPORTED: LIPCcode = 4;
// const LIPC_CODE_LIPC_ERROR_OUT_OF_MEMORY: LIPCcode = 5;
// const LIPC_CODE_LIPC_ERROR_SUBSCRIPTION_FAILED: LIPCcode = 6;
// const LIPC_CODE_LIPC_ERROR_NO_SUCH_PARAM: LIPCcode = 7;
// const LIPC_CODE_LIPC_ERROR_NO_SUCH_PROPERTY: LIPCcode = 8;
// const LIPC_CODE_LIPC_ERROR_ACCESS_NOT_ALLOWED: LIPCcode = 9;
// const LIPC_CODE_LIPC_ERROR_BUFFER_TOO_SMALL: LIPCcode = 10;
// const LIPC_CODE_LIPC_ERROR_INVALID_HANDLE: LIPCcode = 11;
// const LIPC_CODE_LIPC_ERROR_INVALID_ARG: LIPCcode = 12;
// const LIPC_CODE_LIPC_ERROR_OPERATION_NOT_ALLOWED: LIPCcode = 13;
// const LIPC_CODE_LIPC_ERROR_PARAMS_SIZE_EXCEEDED: LIPCcode = 14;
// const LIPC_CODE_LIPC_ERROR_TIMED_OUT: LIPCcode = 15;
// const LIPC_CODE_LIPC_ERROR_SERVICE_NAME_TOO_LONG: LIPCcode = 16;
// const LIPC_CODE_LIPC_ERROR_DUPLICATE_SERVICE_NAME: LIPCcode = 17;
// const LIPC_CODE_LIPC_ERROR_INIT_DBUS: LIPCcode = 18;
// const LIPC_CODE_LIPC_PROP_ERROR_INVALID_STATE: LIPCcode = 256;
// const LIPC_CODE_LIPC_PROP_ERROR_NOT_INITIALIZED: LIPCcode = 257;
// const LIPC_CODE_LIPC_PROP_ERROR_INTERNAL: LIPCcode = 258;
#[derive(WrapperApi)]
pub struct LipcApi {
#[dlopen_name = "LipcOpenNoName"]
lipc_open_no_name: unsafe extern "C" fn() -> *mut LipcType,
#[dlopen_name = "LipcClose"]
lipc_close: unsafe extern "C" fn(lipc: *mut LipcType),
#[dlopen_name = "LipcGetErrorString"]
lipc_get_error_string: unsafe extern "C" fn(code: LipcCode) -> *const c_char,
#[dlopen_name = "LipcFreeString"]
lipc_free_string: unsafe extern "C" fn(string: *mut c_char),
#[dlopen_name = "LipcGetStringProperty"]
lipc_get_string_property: unsafe extern "C" fn(
lipc: *mut LipcType,
service: *const c_char,
property: *const c_char,
value: *mut *mut c_char,
) -> LipcCode,
#[dlopen_name = "LipcSetStringProperty"]
lipc_set_string_property: unsafe extern "C" fn(
lipc: *mut LipcType,
service: *const c_char,
property: *const c_char,
value: *const c_char,
) -> LipcCode,
#[dlopen_name = "LipcGetIntProperty"]
lipc_get_int_property: unsafe extern "C" fn(
lipc: *mut LipcType,
service: *const c_char,
property: *const c_char,
value: *mut c_int,
) -> LipcCode,
#[dlopen_name = "LipcSetIntProperty"]
lipc_set_int_property: unsafe extern "C" fn(
lipc: *mut LipcType,
service: *const c_char,
property: *const c_char,
value: c_int,
) -> LipcCode,
}
impl LipcApi {
const DEFAULT_NAME: &str = "liblipc.so";
pub fn load(path: Option<&str>) -> Result<Container<Self>> {
let name = match path {
Some(x) => x,
None => Self::DEFAULT_NAME,
};
let cont: Container<Self> = unsafe { Container::load(name) }?;
Ok(cont)
}
}
pub struct Lipc {
api: Container<LipcApi>,
conn: *mut LipcType,
}
impl Lipc {
pub fn new(api: Container<LipcApi>) -> Result<Self> {
let lipc = unsafe { (api.lipc_open_no_name)() };
if lipc == (std::ptr::null_mut() as *mut c_void) {
bail!("Failed to create connection!");
}
Ok(Self { api, conn: lipc })
}
pub fn load(name: Option<&str>) -> Result<Self> {
let api = LipcApi::load(name)?;
Self::new(api)
}
fn code_to_result(&self, code: LipcCode) -> Result<()> {
if code == LIPC_CODE_LIPC_OK {
Ok(())
} else {
bail!("LIPC error code: {} ({})", self.code_to_string(code)?, code);
}
}
fn code_to_string(&self, code: LipcCode) -> Result<String> {
let cstr = unsafe {
let str_ptr = (self.api.lipc_get_error_string)(code);
CStr::from_ptr(str_ptr)
};
Ok(String::from(cstr.to_str()?))
}
pub fn get_int_prop(&self, service: &str, prop: &str) -> Result<c_int> {
let mut val: c_int = 0;
let service = CString::new(service)?;
let prop = CString::new(prop)?;
let code = unsafe {
(self.api.lipc_get_int_property)(self.conn, service.as_ptr(), prop.as_ptr(), &mut val)
};
self.code_to_result(code)?;
Ok(val)
}
pub fn set_int_prop(&self, service: &str, prop: &str, value: c_int) -> Result<()> {
let service = CString::new(service)?;
let prop = CString::new(prop)?;
let code = unsafe {
(self.api.lipc_set_int_property)(self.conn, service.as_ptr(), prop.as_ptr(), value)
};
self.code_to_result(code)?;
Ok(())
}
pub fn get_str_prop(&self, service: &str, prop: &str) -> Result<String> {
let mut handle: *mut c_char = std::ptr::null_mut();
let handle_ptr: *mut *mut c_char = &mut handle;
let service = CString::new(service)?;
let prop = CString::new(prop)?;
let code = unsafe {
(self.api.lipc_get_string_property)(
self.conn,
service.as_ptr(),
prop.as_ptr(),
handle_ptr,
)
};
self.code_to_result(code)?;
let val: String;
unsafe {
val = CStr::from_ptr(handle).to_str()?.to_string();
(self.api.lipc_free_string)(handle);
}
Ok(val)
}
pub fn set_str_prop(&self, service: &str, prop: &str, value: &str) -> Result<()> {
let service = CString::new(service)?;
let prop = CString::new(prop)?;
let value = CString::new(value)?;
let code = unsafe {
(self.api.lipc_set_string_property)(
self.conn,
service.as_ptr(),
prop.as_ptr(),
value.as_ptr(),
)
};
self.code_to_result(code)?;
Ok(())
}
}
impl Drop for Lipc {
fn drop(&mut self) {
unsafe {
(self.api.lipc_close)(self.conn);
}
}
}