+struct ChanUser* addChanUser(struct ChanNode *chan, struct UserNode *user);
+struct ChanUser* addInvisibleChanUser(struct ChanNode *chan, struct UserNode *user);
+int isUserOnChan(struct UserNode *user, struct ChanNode *chan);
+struct ChanUser* getChanUser(struct UserNode *user, struct ChanNode *chan);
+struct ChanUser* getChannelUsers(struct ChanNode *chan, struct ChanUser *last);
+struct ChanUser* getUserChannels(struct UserNode *user, struct ChanUser *last);
+void delChanUser(struct ChanUser *chanuser, int freeChanUser);
+void removeChanUserFromLists(struct ChanUser *chanuser, int remove_from_userlist, int remove_from_channellist, int freeChanUser);
+