pub unsafe extern "C" fn coap_proxy_forward_request(
session: *mut coap_session_t,
request: *const coap_pdu_t,
response: *mut coap_pdu_t,
resource: *mut coap_resource_t,
cache_key: *mut coap_cache_key_t,
server_list: *mut coap_proxy_server_list_t,
) -> c_int