char *(*inet_toa)(unsigned long addr);
sessionidt (*get_session_by_username)(char *username);
sessiont *(*get_session_by_id)(sessionidt s);
sessionidt (*get_id_by_session)(sessiont *s);
void (*sessionkill)(sessionidt s, char *reason);
char *(*inet_toa)(unsigned long addr);
sessionidt (*get_session_by_username)(char *username);
sessiont *(*get_session_by_id)(sessionidt s);
sessionidt (*get_id_by_session)(sessiont *s);
void (*sessionkill)(sessionidt s, char *reason);