[user/henk/code/inspircd.git] / include / users.h

/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
 *                       E-mail:
 *                <brain@chatspike.net>
 *                <Craig@chatspike.net>
 *     
 * Written by Craig Edwards, Craig McLure, and others.
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

#ifndef __USERS_H__ 
#define __USERS_H__ 

#include <string>
#include "inspircd_config.h" 
#include "socket.h"
#include "channels.h"
#include "inspstring.h"
#include "connection.h"
#include "hashcomp.h"
#include "dns.h"
#include "cull_list.h"

enum ChanStatus {
        STATUS_OP     = 4,
        STATUS_HOP    = 2,
        STATUS_VOICE  = 1,
        STATUS_NORMAL = 0
};

enum ClassTypes {
        CC_ALLOW = 0,
        CC_DENY  = 1
};

/** RFC1459 channel modes
 *  */
enum UserModes {
        UM_SERVERNOTICE = 's'-65,
        UM_WALLOPS = 'w'-65,
        UM_INVISIBLE = 'i'-65,
        UM_OPERATOR = 'o'-65,
};

enum RegistrationState {
        REG_NONE = 0,           /* Has sent nothing */
        REG_USER = 1,           /* Has sent USER */
        REG_NICK = 2,           /* Has sent NICK */
        REG_NICKUSER = 3,       /* Bitwise combination of REG_NICK and REG_USER */
        REG_ALL = 7             /* REG_NICKUSER plus next bit along */
};

/** Holds a channel name to which a user has been invited.
 */
class Invited : public classbase
{
 public:
         irc::string channel;
};



/** Derived from Resolver, and performs user forward/reverse lookups.
 */
class UserResolver : public Resolver
{
 private:
        /** User this class is 'attached' to.
         */
        userrec* bound_user;
        int bound_fd;
        bool fwd;
 public:
        UserResolver(userrec* user, std::string to_resolve, bool forward);

        void OnLookupComplete(const std::string &result);
        void OnError(ResolverError e, const std::string &errormessage);
};


/** Holds information relevent to &lt;connect allow&gt; and &lt;connect deny&gt; tags in the config file.
 */
class ConnectClass : public classbase
{
 public:
        /** Type of line, either CC_ALLOW or CC_DENY
         */
        char type;
        /** Max time to register the connection in seconds
         */
        int registration_timeout;
        /** Number of lines in buffer before excess flood is triggered
         */
        int flood;
        /** Host mask for this line
         */
        std::string host;
        /** Number of seconds between pings for this line
         */
        int pingtime;
        /** (Optional) Password for this line
         */
        std::string pass;

        /** Threshold value for flood disconnect
         */
        int threshold;

        /** Maximum size of sendq for users in this class (bytes)
         */
        long sendqmax;

        /** Maximum size of recvq for users in this class (bytes)
         */
        long recvqmax;

        /** Local max when connecting by this connection class
         */
        long maxlocal;

        /** Global max when connecting by this connection class
         */
        long maxglobal;
        
        ConnectClass() : registration_timeout(0), flood(0), host(""), pingtime(0), pass(""), threshold(0), sendqmax(0), recvqmax(0)
        {
        }
};

/** Holds a complete list of all channels to which a user has been invited and has not yet joined.
 */
typedef std::vector<Invited> InvitedList;



/** Holds a complete list of all allow and deny tags from the configuration file (connection classes)
 */
typedef std::vector<ConnectClass> ClassVector;

/** Typedef for the list of user-channel records for a user
 */
typedef std::vector<ucrec*> UserChanList;

/** Holds all information about a user
 * This class stores all information about a user connected to the irc server. Everything about a
 * connection is stored here primarily, from the user's socket ID (file descriptor) through to the
 * user's nickname and hostname. Use the Find method of the server class to locate a specific user
 * by nickname.
 */
class userrec : public connection
{
 private:

        /** A list of channels the user has a pending invite to.
         */
        InvitedList invites;
 public:
        /** Resolvers for looking up this users hostname
         */
        UserResolver* res_forward;
        UserResolver* res_reverse;
        std::string stored_host;

        void StartDNSLookup();
        
        /** The users nickname.
         * An invalid nickname indicates an unregistered connection prior to the NICK command.
         */
        
        char nick[NICKMAX];
        
        /** The users ident reply.
         * Two characters are added to the user-defined limit to compensate for the tilde etc.
         */
        char ident[IDENTMAX+2];

        /** The host displayed to non-opers (used for cloaking etc).
         * This usually matches the value of userrec::host.
         */
        char dhost[65];
        
        /** The users full name.
         */
        char fullname[MAXGECOS+1];
        
        /** The user's mode list.
         * This is NOT a null terminated string! In the 1.1 version of InspIRCd
         * this is an array of values in a similar way to channel modes.
         * A value of 1 in field (modeletter-65) indicates that the mode is
         * set, for example, to work out if mode +s is set, we  check the field
         * userrec::modes['s'-65] != 0.
         * The following RFC characters o, w, s, i have constants defined via an
         * enum, such as UM_SERVERNOTICE and UM_OPETATOR.
         */
        char modes[64];

        /** What snomasks are set on this user.
         * This functions the same as the above modes.
         */
        char snomasks[64];

        UserChanList chans;
        
        /** The server the user is connected to.
         */
        const char* server;
        
        /** The user's away message.
         * If this string is empty, the user is not marked as away.
         */
        char awaymsg[MAXAWAY+1];
        
        /** Number of lines the user can place into the buffer
         * (up to the global NetBufferSize bytes) before they
         * are disconnected for excess flood
         */
        int flood;
        
        /** Number of seconds this user is given to send USER/NICK
         * If they do not send their details in this time limit they
         * will be disconnected
         */
        unsigned int timeout;
        
        /** The oper type they logged in as, if they are an oper.
         * This is used to check permissions in operclasses, so that
         * we can say 'yay' or 'nay' to any commands they issue.
         * The value of this is the value of a valid 'type name=' tag.
         */
        char oper[NICKMAX];

        /** True when DNS lookups are completed.
         */
        bool dns_done;

        /** Number of seconds between PINGs for this user (set from &lt;connect:allow&gt; tag
         */
        unsigned int pingmax;

        /** Password specified by the user when they registered.
         * This is stored even if the <connect> block doesnt need a password, so that
         * modules may check it.
         */
        char password[64];

        /** User's receive queue.
         * Lines from the IRCd awaiting processing are stored here.
         * Upgraded april 2005, old system a bit hairy.
         */
        std::string recvq;

        /** User's send queue.
         * Lines waiting to be sent are stored here until their buffer is flushed.
         */
        std::string sendq;

        /** Flood counters
         */
        int lines_in;
        time_t reset_due;
        long threshold;

        /** IPV4 ip address
         */
        sockaddr* ip;

        /** Initialize the clients sockaddr
         */
        void SetSockAddr(int protocol_family, const char* ip, int port);

        /** Get port number from sockaddr
         */
        int GetPort();

        /** Get protocol family from sockaddr
         */
        int GetProtocolFamily();

        /** Get IP string from sockaddr
         */
        const char* GetIPString();

        /* Write error string
         */
        std::string WriteError;

        /** Maximum size this user's sendq can become
         */
        long sendqmax;

        /** Maximum size this user's recvq can become
         */
        long recvqmax;

        /** Default constructor
         */
        userrec();
        
        /** Returns the full displayed host of the user
         * This member function returns the hostname of the user as seen by other users
         * on the server, in nick!ident&at;host form.
         */
        virtual char* GetFullHost();
        
        /** Returns the full real host of the user
         * This member function returns the hostname of the user as seen by other users
         * on the server, in nick!ident&at;host form. If any form of hostname cloaking is in operation,
         * e.g. through a module, then this method will ignore it and return the true hostname.
         */
        virtual char* GetFullRealHost();

        /*
         * Create a displayable mode string for this users umodes
         */
        const char* FormatNoticeMasks();

        bool userrec::ProcessNoticeMasks(const char *sm);

        bool IsNoticeMaskSet(unsigned char sm);

        void SetNoticeMask(unsigned char sm, bool value);

        /*
         * Create a displayable mode string for this users umodes
         */
        const char* FormatModes();

        bool IsModeSet(unsigned char m);

        void SetMode(unsigned char m, bool value);
        
        /** Returns true if a user is invited to a channel.
         */
        virtual bool IsInvited(irc::string &channel);
        
        /** Adds a channel to a users invite list (invites them to a channel)
         */
        virtual void InviteTo(irc::string &channel);
        
        /** Removes a channel from a users invite list.
         * This member function is called on successfully joining an invite only channel
         * to which the user has previously been invited, to clear the invitation.
         */
        virtual void RemoveInvite(irc::string &channel);
        
        /** Returns true or false for if a user can execute a privilaged oper command.
         * This is done by looking up their oper type from userrec::oper, then referencing
         * this to their oper classes and checking the commands they can execute.
         */
        bool HasPermission(const std::string &command);

        /** Calls read() to read some data for this user using their fd.
         */
        int ReadData(void* buffer, size_t size);

        /** This method adds data to the buffer of the user.
         * The buffer can grow to any size within limits of the available memory,
         * managed by the size of a std::string, however if any individual line in
         * the buffer grows over 600 bytes in length (which is 88 chars over the
         * RFC-specified limit per line) then the method will return false and the
         * text will not be inserted.
         */
        bool AddBuffer(const std::string &a);

        /** This method returns true if the buffer contains at least one carriage return
         * character (e.g. one complete line may be read)
         */
        bool BufferIsReady();

        /** This function clears the entire buffer by setting it to an empty string.
         */
        void ClearBuffer();

        /** This method returns the first available string at the tail end of the buffer
         * and advances the tail end of the buffer past the string. This means it is
         * a one way operation in a similar way to strtok(), and multiple calls return
         * multiple lines if they are available. The results of this function if there
         * are no lines to be read are unknown, always use BufferIsReady() to check if
         * it is ok to read the buffer before calling GetBuffer().
         */
        std::string GetBuffer();

        /** Sets the write error for a connection. This is done because the actual disconnect
         * of a client may occur at an inopportune time such as half way through /LIST output.
         * The WriteErrors of clients are checked at a more ideal time (in the mainloop) and
         * errored clients purged.
         */
        void SetWriteError(const std::string &error);

        /** Returns the write error which last occured on this connection or an empty string
         * if none occured.
         */
        const char* GetWriteError();

        /** Adds to the user's write buffer.
         * You may add any amount of text up to this users sendq value, if you exceed the
         * sendq value, SetWriteError() will be called to set the users error string to
         * "SendQ exceeded", and further buffer adds will be dropped.
         */
        void AddWriteBuf(const std::string &data);

        /** Flushes as much of the user's buffer to the file descriptor as possible.
         * This function may not always flush the entire buffer, rather instead as much of it
         * as it possibly can. If the send() call fails to send the entire buffer, the buffer
         * position is advanced forwards and the rest of the data sent at the next call to
         * this method.
         */
        void FlushWriteBuf();

        /** Returns the list of channels this user has been invited to but has not yet joined.
         */
        InvitedList* GetInviteList();

        /** Creates a wildcard host.
         * Takes a buffer to use and fills the given buffer with the host in the format *!*@hostname
         */
        char* MakeWildHost();

        /** Creates a host.
         * Takes a buffer to use and fills the given buffer with the host in the format nick!user@host
         */
        void MakeHost(char* nhost);

        /** Shuts down and closes the user's socket
         */
        void CloseSocket();

        /** Default destructor
         */
        virtual ~userrec();
};

/** Used to hold WHOWAS information
 */
class WhoWasGroup : public classbase
{
 public:
        char* host;
        char* dhost;
        char* ident;
        const char* server;
        char* gecos;
        time_t signon;

        WhoWasGroup(userrec* user);
        ~WhoWasGroup();
};

typedef std::deque<WhoWasGroup*> whowas_set;
typedef std::map<irc::string,whowas_set*> whowas_users;

void AddOper(userrec* user);
void DeleteOper(userrec* user);
void kill_link(userrec *user,const char* r);
void kill_link_silent(userrec *user,const char* r);
void AddWhoWas(userrec* u);
void MaintainWhoWas(time_t TIME);
void AddClient(int socket, int port, bool iscached, insp_inaddr ip4);
void FullConnectUser(userrec* user, CullList* Goners);
userrec* ReHashNick(const char* Old, const char* New);
void force_nickchange(userrec* user,const char* newnick);

/* Configuration callbacks */
bool InitTypes(const char* tag);
bool InitClasses(const char* tag);
bool DoType(const char* tag, char** entries, void** values, int* types);
bool DoClass(const char* tag, char** entries, void** values, int* types);
bool DoneClassesAndTypes(const char* tag);

long FindMatchingGlobal(userrec* user);
long FindMatchingLocal(userrec* user);

#endif