InterfaceEnumerator.cxx

// cosmos
#include <cosmos/error/ApiError.hxx>
#include <cosmos/net/InterfaceEnumerator.hxx>
 
namespace cosmos {
 
// this type is only supposed to be a thin C++ wrapper that can be casted
// directory to the plain C struct
static_assert(sizeof(InterfaceInfo) == sizeof(struct if_nameindex));
 
void InterfaceEnumerator::clear() {
        if (m_list) {
                ::if_freenameindex(m_list);
                m_list = nullptr;
        }
}
 
void InterfaceEnumerator::fetch() {
        clear();
        m_list = reinterpret_cast<InterfaceInfo*>(::if_nameindex());
 
        if (!m_list) {
                cosmos_throw(ApiError("ifnameindex()"));
        }
}
 
} // end ns