user-directory.h   [plain text]

#ifndef USER_DIRECTORY_H
#define USER_DIRECTORY_H

struct user {
	/* sorted by time */
	struct user *prev, *next;

	/* first 32 bits of MD5(username). collisions are quite unlikely, but
	   even if they happen it doesn't matter - the users are just
	   redirected to same server */
	unsigned int username_hash;
	unsigned int timestamp;

	struct mail_host *host;
};

/* Create a new directory. Users are dropped if their time gets older
   than timeout_secs. */
struct user_directory *user_directory_init(unsigned int timeout_secs);
void user_directory_deinit(struct user_directory **dir);

/* Look up username from directory. Returns NULL if not found. */
struct user *user_directory_lookup(struct user_directory *dir,
				   unsigned int username_hash);
/* Add a user to directory and return it. */
struct user *
user_directory_add(struct user_directory *dir, unsigned int username_hash,
		   struct mail_host *host, time_t timestamp);
/* Refresh user's timestamp */
void user_directory_refresh(struct user_directory *dir, struct user *user);

/* Remove all users that have pointers to given host */
void user_directory_remove_host(struct user_directory *dir,
				struct mail_host *host);

unsigned int user_directory_get_username_hash(const char *username);

/* Returns TRUE if user still potentially has connections. */
bool user_directory_user_has_connections(struct user_directory *dir,
					 struct user *user);

struct user_directory_iter *
user_directory_iter_init(struct user_directory *dir);
struct user *user_directory_iter_next(struct user_directory_iter *iter);
void user_directory_iter_deinit(struct user_directory_iter **iter);

#endif