Implement clone for RsdHandshake

cpp/include/idevice++/rsd.hpp

@@ -40,8 +40,10 @@ class RsdHandshake {
     ~RsdHandshake() noexcept                         = default;
     RsdHandshake(RsdHandshake&&) noexcept            = default;
     RsdHandshake& operator=(RsdHandshake&&) noexcept = default;
-    RsdHandshake(const RsdHandshake&)                  = delete;
+
-    RsdHandshake&       operator=(const RsdHandshake&) = delete;
+    // Enable Copying
+    RsdHandshake(const RsdHandshake& other);
+    RsdHandshake&       operator=(const RsdHandshake& other);
 
     RsdHandshakeHandle* raw() const noexcept { return handle_.get(); }
     static RsdHandshake adopt(RsdHandshakeHandle* h) noexcept { return RsdHandshake(h); }

cpp/src/rsd.cpp

@@ -61,6 +61,24 @@ static std::vector<RsdService> to_cpp_and_free(CRsdServiceArray* arr) {
     return out;
 }
 
+RsdHandshake::RsdHandshake(const RsdHandshake& other) {
+    if (other.handle_) {
+        // Call the Rust FFI to clone the underlying handle
+        handle_.reset(rsd_handshake_clone(other.handle_.get()));
+    }
+    // If other.handle_ is null, our new handle_ will also be null, which is correct.
+}
+
+RsdHandshake& RsdHandshake::operator=(const RsdHandshake& other) {
+    // Check for self-assignment
+    if (this != &other) {
+        // Create a temporary copy, then swap ownership
+        RsdHandshake temp(other);
+        std::swap(handle_, temp.handle_);
+    }
+    return *this;
+}
+
 // ---------- factory ----------
 std::optional<RsdHandshake> RsdHandshake::from_socket(ReadWrite&& rw, FfiError& err) {
     RsdHandshakeHandle* out = nullptr;

ffi/src/rsd.rs

@@ -10,6 +10,7 @@ use idevice::rsd::RsdHandshake;
 use crate::{IdeviceFfiError, RUNTIME, ReadWriteOpaque, ffi_err};
 
 /// Opaque handle to an RsdHandshake
+#[derive(Clone)]
 pub struct RsdHandshakeHandle(pub RsdHandshake);
 
 /// C-compatible representation of an RSD service
@@ -370,6 +371,22 @@ pub unsafe extern "C" fn rsd_get_service_info(
     null_mut()
 }
 
+/// Clones an RSD handshake
+///
+/// # Safety
+/// Pass a valid pointer allocated by this library
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn rsd_handshake_clone(
+    handshake: *mut RsdHandshakeHandle,
+) -> *mut RsdHandshakeHandle {
+    if handshake.is_null() {
+        return null_mut();
+    }
+    let handshake = unsafe { &mut *handshake };
+    let new_handshake = handshake.clone();
+    Box::into_raw(Box::new(new_handshake))
+}
+
 /// Frees a string returned by RSD functions
 ///
 /// # Arguments

idevice/src/services/rsd.rs

@@ -23,6 +23,7 @@ pub struct RsdService {
     pub service_version: Option<i64>,
 }
 
+#[derive(Debug, Clone)]
 pub struct RsdHandshake {
     pub services: HashMap<String, RsdService>,
     pub protocol_version: usize,