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use frida_gum_sys as gum_sys;
use std::marker::PhantomData;
#[cfg(feature = "invocation-listener")]
use std::os::raw::c_void;
#[cfg(feature = "invocation-listener")]
use std::ptr;
use crate::NativePointer;
use crate::{Error, Gum, Result};
#[cfg(feature = "invocation-listener")]
mod invocation_listener;
#[cfg(feature = "invocation-listener")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "invocation-listener")))]
pub use invocation_listener::*;
pub struct Interceptor<'a> {
interceptor: *mut gum_sys::GumInterceptor,
phantom: PhantomData<&'a gum_sys::GumInterceptor>,
}
impl<'a> Interceptor<'a> {
pub fn obtain<'b>(_gum: &'b Gum) -> Interceptor
where
'b: 'a,
{
Interceptor {
interceptor: unsafe { gum_sys::gum_interceptor_obtain() },
phantom: PhantomData,
}
}
#[cfg(feature = "invocation-listener")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "invocation-listener")))]
pub fn attach<I: InvocationListener>(
&mut self,
f: NativePointer,
listener: &mut I,
) -> NativePointer {
let listener = invocation_listener_transform(listener);
unsafe {
gum_sys::gum_interceptor_attach(self.interceptor, f.0, listener, ptr::null_mut())
};
NativePointer(listener as *mut c_void)
}
#[cfg(feature = "invocation-listener")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "invocation-listener")))]
pub fn detach(&mut self, listener: NativePointer) {
unsafe {
gum_sys::gum_interceptor_detach(
self.interceptor,
listener.0 as *mut gum_sys::GumInvocationListener,
)
};
}
pub fn replace(
&mut self,
function: NativePointer,
replacement: NativePointer,
replacement_data: NativePointer,
) -> Result<()> {
unsafe {
match gum_sys::gum_interceptor_replace(
self.interceptor,
function.0,
replacement.0,
replacement_data.0,
) {
gum_sys::GumReplaceReturn_GUM_REPLACE_OK => Ok(()),
gum_sys::GumReplaceReturn_GUM_REPLACE_WRONG_SIGNATURE => {
Err(Error::InterceptorBadSignature)
}
gum_sys::GumReplaceReturn_GUM_REPLACE_ALREADY_REPLACED => {
Err(Error::InterceptorAlreadyReplaced)
}
gum_sys::GumReplaceReturn_GUM_REPLACE_POLICY_VIOLATION => {
Err(Error::PolicyViolation)
}
_ => Err(Error::InterceptorError),
}
}
}
pub fn revert(&mut self, function: NativePointer) {
unsafe {
gum_sys::gum_interceptor_revert(self.interceptor, function.0);
}
}
#[cfg(feature = "invocation-listener")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "invocation-listener")))]
pub fn current_invocation() -> InvocationContext<'a> {
InvocationContext::from_raw(unsafe { gum_sys::gum_interceptor_get_current_invocation() })
}
pub fn begin_transaction(&mut self) {
unsafe { gum_sys::gum_interceptor_begin_transaction(self.interceptor) };
}
pub fn end_transaction(&mut self) {
unsafe { gum_sys::gum_interceptor_end_transaction(self.interceptor) };
}
}