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handle deallocation request in native_resolve_cb #13

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Jan 31, 2024
Merged

handle deallocation request in native_resolve_cb #13

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9 changes: 9 additions & 0 deletions src/client.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -525,6 +525,15 @@ pub(crate) unsafe extern "C" fn native_resolve_cb<C: ClientContext>(
res: *mut *mut addrinfo,
opaque: *mut c_void,
) -> i32 {
if node.is_null() {
// If `node`` is `NULL`, we expect `service` and `hints` to also be
// `NULL`, and altogether this indicates a request to free `res`.
assert!(service.is_null());
assert!(hints.is_null());
unsafe { libc::freeaddrinfo(*res) }
return 0; // NOTE: this return code is ignored by librdkafka in this code path
}

// Convert host and port to Rust strings.
let host = match CStr::from_ptr(node).to_str() {
Ok(host) => host.into(),
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