ftdm_io_interface 187 src/include/ftdm_declare.h typedef struct ftdm_io_interface ftdm_io_interface_t; ftdm_io_interface 429 src/include/private/ftdm_core.h struct ftdm_io_interface *fio; ftdm_io_interface 451 src/include/private/ftdm_core.h struct ftdm_io_interface *fio;