/* ... */
#ifndef EXT_PASSWORD_I_H
#define EXT_PASSWORD_I_H
#include "ext_password.h"
struct ext_password_backend {
const char *name;
void * (*init)(const char *params);
void (*deinit)(void *ctx);
struct wpabuf * (*get)(void *ctx, const char *name);
}{ ... };
struct wpabuf * ext_password_alloc(size_t len);
/* ... */
#endif