/* * charybdis: A useful ircd. * client.h: The ircd client header. * * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center * Copyright (C) 1996-2002 Hybrid Development Team * Copyright (C) 2002-2004 ircd-ratbox development team * Copyright (C) 2005 William Pitcock and Jilles Tjoelker * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA * * $Id: client.h 3446 2007-05-14 22:21:16Z jilles $ */ #ifndef INCLUDED_client_h #define INCLUDED_client_h #include "config.h" #if !defined(CONFIG_RATBOX_LEVEL_1) #error Incorrect config.h for this revision of ircd. #endif #include "ircd_defs.h" #include "channel.h" #include "res.h" #include "snomask.h" #include "irc_string.h" #include "sprintf_irc.h" #include "ircd.h" /* other structs */ struct Blacklist; /* we store ipv6 ips for remote clients, so this needs to be v6 always */ #define HOSTIPLEN 53 /* sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255.ipv6") */ #define PASSWDLEN 128 #define CIPHERKEYLEN 64 /* 512bit */ #define CLIENT_BUFSIZE 512 /* must be at least 512 bytes */ #define IDLEN 10 /* * pre declare structs */ struct ConfItem; struct Whowas; struct DNSReply; struct Listener; struct Client; struct User; struct Server; struct LocalUser; struct AuthRequest; struct PreClient; struct ListClient; struct scache_entry; /* * Atheme's coding standards require that we use BSD-style user-defined types * for stuff. Fun! --nenolod */ typedef struct User user_t; typedef struct Server server_t; typedef struct Client client_t; typedef struct LocalUser local_user_t; typedef struct Listener listener_t; typedef struct DNSReply dns_reply_t; typedef struct Whowas whowas_entry_t; typedef struct ConfItem conf_item_t; typedef struct AuthRequest auth_request_t; typedef struct PreClient pre_client_t; typedef struct ListClient list_client_t; /* * Client structures */ struct User { rb_dlink_list channel; /* chain of channel pointer blocks */ rb_dlink_list invited; /* chain of invite pointer blocks */ char *away; /* pointer to away message */ int refcnt; /* Number of times this block is referenced */ char suser[NICKLEN+1]; }; struct Server { user_t *user; /* who activated this connection */ char by[NICKLEN]; rb_dlink_list servers; rb_dlink_list users; int caps; /* capabilities bit-field */ char *fullcaps; struct scache_entry *nameinfo; }; struct ZipStats { unsigned long in; unsigned long in_wire; unsigned long out; unsigned long out_wire; unsigned long inK; unsigned long inK_wire; unsigned long outK; unsigned long outK_wire; double in_ratio; double out_ratio; }; struct Client { rb_dlink_node node; rb_dlink_node lnode; user_t *user; /* ...defined, if this is a User */ server_t *serv; /* ...defined, if this is a server */ client_t *servptr; /* Points to server this Client is on */ client_t *from; /* == self, if Local Client, *NEVER* NULL! */ whowas_entry_t *whowas; /* Pointers to whowas structs */ time_t tsinfo; /* TS on the nick, SVINFO on server */ unsigned int umodes; /* opers, normal users subset */ unsigned int flags; /* client flags */ unsigned int flags2; /* ugh. overflow */ unsigned int snomask; /* server notice mask */ int hopcount; /* number of servers to this 0 = local */ unsigned short status; /* Client type */ unsigned char handler; /* Handler index */ unsigned long serial; /* used to enforce 1 send per nick */ /* client->name is the unique name for a client nick or host */ char name[HOSTLEN + 1]; /* * client->username is the username from ident or the USER message, * If the client is idented the USER message is ignored, otherwise * the username part of the USER message is put here prefixed with a * tilde depending on the I:line, Once a client has registered, this * field should be considered read-only. */ char username[USERLEN + 1]; /* client's username */ /* * client->host contains the resolved name or ip address * as a string for the user, it may be fiddled with for oper spoofing etc. */ char host[HOSTLEN + 1]; /* client's hostname */ char orighost[HOSTLEN + 1]; /* original hostname (before dynamic spoofing) */ char sockhost[HOSTIPLEN + 1]; /* clients ip */ char info[REALLEN + 1]; /* Free form additional client info */ char id[IDLEN]; /* UID/SID, unique on the network */ /* list of who has this client on their allow list, its counterpart * is in LocalUser */ rb_dlink_list on_allow_list; local_user_t *localClient; pre_client_t *preClient; }; struct LocalUser { rb_dlink_node tnode; /* This is the node for the local list type the client is on*/ /* * The following fields are allocated only for local clients * (directly connected to *this* server with a socket. */ /* Anti flooding part, all because of lamers... */ time_t last_join_time; /* when this client last joined a channel */ time_t last_leave_time; /* when this client last * left a channel */ int join_leave_count; /* count of JOIN/LEAVE in less than MIN_JOIN_LEAVE_TIME seconds */ int oper_warn_count_down; /* warn opers of this possible spambot every time this gets to 0 */ time_t last_caller_id_time; time_t first_received_message_time; int received_number_of_privmsgs; int flood_noticed; time_t lasttime; /* last time we parsed something */ time_t firsttime; /* time client was created */ /* Send and receive linebuf queues .. */ buf_head_t buf_sendq; buf_head_t buf_recvq; /* * we want to use unsigned int here so the sizes have a better chance of * staying the same on 64 bit machines. The current trend is to use * I32LP64, (32 bit ints, 64 bit longs and pointers) and since ircd * will NEVER run on an operating system where ints are less than 32 bits, * it's a relatively safe bet to use ints. Since right shift operations are * performed on these, it's not safe to allow them to become negative, * which is possible for long running server connections. Unsigned values * generally overflow gracefully. --Bleep */ unsigned int sendM; /* Statistics: protocol messages send */ unsigned int sendK; /* Statistics: total k-bytes send */ unsigned int receiveM; /* Statistics: protocol messages received */ unsigned int receiveK; /* Statistics: total k-bytes received */ unsigned short sendB; /* counters to count upto 1-k lots of bytes */ unsigned short receiveB; /* sent and received. */ listener_t *listener; /* listener accepted from */ conf_item_t *att_conf; /* attached conf */ struct server_conf *att_sconf; struct rb_sockaddr_storage ip; time_t last_nick_change; int number_of_nick_changes; /* * XXX - there is no reason to save this, it should be checked when it's * received and not stored, this is not used after registration * * agreed. lets get rid of it someday! --nenolod */ char *passwd; char *opername; /* name of operator{} block being used or tried (challenge) */ char *challenge; char *fullcaps; int caps; /* capabilities bit-field */ rb_fde_t *F; /* >= 0, for local clients */ /* time challenge response is valid for */ time_t chal_time; struct DNSQuery *dnsquery; /* for outgoing server's name lookup */ time_t last_away; /* Away since... */ time_t last; /* clients allowed to talk through +g */ rb_dlink_list allow_list; /* nicknames theyre monitoring */ rb_dlink_list monitor_list; /* * Anti-flood stuff. We track how many messages were parsed and how * many we were allowed in the current second, and apply a simple decay * to avoid flooding. * -- adrian */ int allow_read; /* how many we're allowed to read in this second */ int actually_read; /* how many we've actually read in this second */ int sent_parsed; /* how many messages we've parsed in this second */ time_t last_knock; /* time of last knock */ unsigned long random_ping; auth_request_t *auth_request; /* target change stuff */ uint32_t targets[10]; /* targets were aware of (fnv32(use_id(target_p))) */ unsigned int targinfo[2]; /* cyclic array, no in use */ time_t target_last; /* last time we cleared a slot */ list_client_t *safelist_data; char *mangledhost; /* non-NULL if host mangling module loaded and applicable to this client */ struct _ssl_ctl *ssl_ctl; /* which ssl daemon we're associate with */ rb_uint32_t localflags; struct ZipStats *zipstats; /* zipstats */ rb_uint16_t cork_count; /* used for corking/uncorking connections */ struct ev_entry *event; /* used for associated events */ }; struct PreClient { char spoofnick[NICKLEN + 1]; char spoofuser[USERLEN + 1]; char spoofhost[HOSTLEN + 1]; char sasl_agent[IDLEN]; unsigned char sasl_out; unsigned char sasl_complete; rb_dlink_list dnsbl_queries; /* list of struct BlacklistClient * */ struct Blacklist *dnsbl_listed; /* first dnsbl where it's listed */ }; struct ListClient { unsigned int hash_indice; unsigned int users_min, users_max; /* It would be nice to add other modifiers, * but not for 1.1 --nenolod */ }; struct exit_client_hook { struct Client *client_p; char exit_message[TOPICLEN]; }; /* * status macros. */ #define STAT_CONNECTING 0x01 #define STAT_HANDSHAKE 0x02 #define STAT_ME 0x04 #define STAT_UNKNOWN 0x08 #define STAT_REJECT 0x10 #define STAT_SERVER 0x20 #define STAT_CLIENT 0x40 #define IsRegisteredUser(x) ((x)->status == STAT_CLIENT) #define IsRegistered(x) (((x)->status > STAT_UNKNOWN) && ((x)->status != STAT_REJECT)) #define IsConnecting(x) ((x)->status == STAT_CONNECTING) #define IsHandshake(x) ((x)->status == STAT_HANDSHAKE) #define IsMe(x) ((x)->status == STAT_ME) #define IsUnknown(x) ((x)->status == STAT_UNKNOWN) #define IsServer(x) ((x)->status == STAT_SERVER) #define IsClient(x) ((x)->status == STAT_CLIENT) #define IsReject(x) ((x)->status == STAT_REJECT) #define IsAnyServer(x) (IsServer(x) || IsHandshake(x) || IsConnecting(x)) #define IsOper(x) ((x)->umodes & UMODE_OPER) #define IsAdmin(x) ((x)->umodes & UMODE_ADMIN) #define SetReject(x) {(x)->status = STAT_REJECT; \ (x)->handler = UNREGISTERED_HANDLER; } #define SetConnecting(x) {(x)->status = STAT_CONNECTING; \ (x)->handler = UNREGISTERED_HANDLER; } #define SetHandshake(x) {(x)->status = STAT_HANDSHAKE; \ (x)->handler = UNREGISTERED_HANDLER; } #define SetMe(x) {(x)->status = STAT_ME; \ (x)->handler = UNREGISTERED_HANDLER; } #define SetUnknown(x) {(x)->status = STAT_UNKNOWN; \ (x)->handler = UNREGISTERED_HANDLER; } #define SetServer(x) {(x)->status = STAT_SERVER; \ (x)->handler = SERVER_HANDLER; } #define SetClient(x) {(x)->status = STAT_CLIENT; \ (x)->handler = IsOper((x)) ? \ OPER_HANDLER : CLIENT_HANDLER; } #define SetRemoteClient(x) {(x)->status = STAT_CLIENT; \ (x)->handler = RCLIENT_HANDLER; } #define STAT_CLIENT_PARSE (STAT_UNKNOWN | STAT_CLIENT) #define STAT_SERVER_PARSE (STAT_CONNECTING | STAT_HANDSHAKE | STAT_SERVER) #define PARSE_AS_CLIENT(x) ((x)->status & STAT_CLIENT_PARSE) #define PARSE_AS_SERVER(x) ((x)->status & STAT_SERVER_PARSE) /* * ts stuff */ #define TS_CURRENT 6 #ifdef TS6_ONLY #define TS_MIN 6 #else #define TS_MIN 3 #endif #define TS_DOESTS 0x10000000 #define DoesTS(x) ((x)->tsinfo & TS_DOESTS) #define has_id(source) ((source)->id[0] != '\0') #define use_id(source) ((source)->id[0] != '\0' ? (source)->id : (source)->name) /* if target is TS6, use id if it has one, else name */ #define get_id(source, target) ((IsServer(target->from) && has_id(target->from)) ? \ use_id(source) : (source)->name) /* housekeeping flags */ #define FLAGS_PINGSENT 0x0001 /* Unreplied ping sent */ #define FLAGS_DEAD 0x0002 /* Local socket is dead--Exiting soon */ #define FLAGS_KILLED 0x0004 /* Prevents "QUIT" from being sent for this */ #define FLAGS_SENTUSER 0x0008 /* Client sent a USER command. */ #define FLAGS_CLICAP 0x0010 /* In CAP negotiation, wait for CAP END */ #define FLAGS_CLOSING 0x0020 /* set when closing to suppress errors */ #define FLAGS_PING_COOKIE 0x0040 /* has sent ping cookie */ #define FLAGS_GOTID 0x0080 /* successful ident lookup achieved */ #define FLAGS_FLOODDONE 0x0100 /* flood grace period over / reported */ #define FLAGS_NORMALEX 0x0400 /* Client exited normally */ #define FLAGS_SENDQEX 0x0800 /* Sendq exceeded */ #define FLAGS_SERVLINK 0x10000 /* servlink has servlink process */ #define FLAGS_MARK 0x20000 /* marked client */ #define FLAGS_HIDDEN 0x40000 /* hidden server */ #define FLAGS_EOB 0x80000 /* EOB */ #define FLAGS_MYCONNECT 0x100000 /* MyConnect */ #define FLAGS_IOERROR 0x200000 /* IO error */ #define FLAGS_SERVICE 0x400000 /* network service */ #define FLAGS_TGCHANGE 0x800000 /* we're allowed to clear something */ #define FLAGS_DYNSPOOF 0x1000000 /* dynamic spoof, only opers see ip */ #define FLAGS_EXUNKNOWN 0x2000000 /* too many unknowns exit.. */ /* flags for local clients, this needs stuff moved from above to here at some point */ #define LFLAGS_SSL 0x00000001 #define LFLAGS_FLUSH 0x00000002 #define LFLAGS_CORK 0x00000004 /* umodes, settable flags */ /* lots of this moved to snomask -- jilles */ #define UMODE_SERVNOTICE 0x0001 /* server notices */ #define UMODE_WALLOP 0x0100 /* send wallops to them */ #define UMODE_OPERWALL 0x0200 /* Operwalls */ #define UMODE_INVISIBLE 0x0400 /* makes user invisible */ #define UMODE_CALLERID 0x2000 /* block unless caller id's */ #define UMODE_LOCOPS 0x8000 /* show locops */ #define UMODE_SERVICE 0x40000 #define UMODE_DEAF 0x80000 #define UMODE_NOFORWARD 0x400000 /* don't forward */ #define UMODE_REGONLYMSG 0x800000 /* only allow logged in users to msg */ /* user information flags, only settable by remote mode or local oper */ #define UMODE_OPER 0x100000 /* Operator */ #define UMODE_ADMIN 0x200000 /* Admin on server */ #define UMODE_SSLCLIENT 0x1000000 /* using SSL */ #define UMODE_ALL UMODE_SERVNOTICE /* overflow flags */ /* EARLIER FLAGS ARE IN s_newconf.h */ #define FLAGS2_EXEMPTRESV 0x00400000 #define FLAGS2_EXEMPTGLINE 0x00800000 #define FLAGS2_EXEMPTKLINE 0x01000000 #define FLAGS2_EXEMPTFLOOD 0x02000000 #define FLAGS2_IP_SPOOFING 0x10000000 #define FLAGS2_EXEMPTSPAMBOT 0x20000000 #define FLAGS2_EXEMPTSHIDE 0x40000000 #define FLAGS2_EXEMPTJUPE 0x80000000 #define DEFAULT_OPER_UMODES (UMODE_SERVNOTICE | UMODE_OPERWALL | \ UMODE_WALLOP | UMODE_LOCOPS) #define DEFAULT_OPER_SNOMASK SNO_GENERAL #define CLICAP_MULTI_PREFIX 0x0001 #define CLICAP_SASL 0x0002 /* * flags macros. */ #define IsPerson(x) (IsClient(x) && (x)->user != NULL) #define HasServlink(x) ((x)->flags & FLAGS_SERVLINK) #define SetServlink(x) ((x)->flags |= FLAGS_SERVLINK) #define MyConnect(x) ((x)->flags & FLAGS_MYCONNECT) #define SetMyConnect(x) ((x)->flags |= FLAGS_MYCONNECT) #define ClearMyConnect(x) ((x)->flags &= ~FLAGS_MYCONNECT) #define MyClient(x) (MyConnect(x) && IsClient(x)) #define SetMark(x) ((x)->flags |= FLAGS_MARK) #define ClearMark(x) ((x)->flags &= ~FLAGS_MARK) #define IsMarked(x) ((x)->flags & FLAGS_MARK) #define SetHidden(x) ((x)->flags |= FLAGS_HIDDEN) #define ClearHidden(x) ((x)->flags &= ~FLAGS_HIDDEN) #define IsHidden(x) ((x)->flags & FLAGS_HIDDEN) #define ClearEob(x) ((x)->flags &= ~FLAGS_EOB) #define SetEob(x) ((x)->flags |= FLAGS_EOB) #define HasSentEob(x) ((x)->flags & FLAGS_EOB) #define IsDead(x) ((x)->flags & FLAGS_DEAD) #define SetDead(x) ((x)->flags |= FLAGS_DEAD) #define IsClosing(x) ((x)->flags & FLAGS_CLOSING) #define SetClosing(x) ((x)->flags |= FLAGS_CLOSING) #define IsIOError(x) ((x)->flags & FLAGS_IOERROR) #define SetIOError(x) ((x)->flags |= FLAGS_IOERROR) #define IsAnyDead(x) (IsIOError(x) || IsDead(x) || IsClosing(x)) #define IsTGChange(x) ((x)->flags & FLAGS_TGCHANGE) #define SetTGChange(x) ((x)->flags |= FLAGS_TGCHANGE) #define ClearTGChange(x) ((x)->flags &= ~FLAGS_TGCHANGE) #define IsDynSpoof(x) ((x)->flags & FLAGS_DYNSPOOF) #define SetDynSpoof(x) ((x)->flags |= FLAGS_DYNSPOOF) #define ClearDynSpoof(x) ((x)->flags &= ~FLAGS_DYNSPOOF) #define IsExUnknown(x) ((x)->flags & FLAGS_EXUNKNOWN) #define SetExUnknown(x) ((x)->flags |= FLAGS_EXUNKNOWN) /* local flags */ #define IsSSL(x) ((x)->localClient->localflags & LFLAGS_SSL) #define SetSSL(x) ((x)->localClient->localflags |= LFLAGS_SSL) #define ClearSSL(x) ((x)->localClient->localflags &= ~LFLAGS_SSL) #define IsFlush(x) ((x)->localClient->localflags & LFLAGS_FLUSH) #define SetFlush(x) ((x)->localClient->localflags |= LFLAGS_FLUSH) #define ClearFlush(x) ((x)->localClient->localflags &= ~LFLAGS_FLUSH) /* oper flags */ #define MyOper(x) (MyConnect(x) && IsOper(x)) #define SetOper(x) {(x)->umodes |= UMODE_OPER; \ if (MyClient((x))) (x)->handler = OPER_HANDLER;} #define ClearOper(x) {(x)->umodes &= ~(UMODE_OPER|UMODE_ADMIN); \ if (MyClient((x)) && !IsOper((x)) && !IsServer((x))) \ (x)->handler = CLIENT_HANDLER; } /* umode flags */ #define IsInvisible(x) ((x)->umodes & UMODE_INVISIBLE) #define SetInvisible(x) ((x)->umodes |= UMODE_INVISIBLE) #define ClearInvisible(x) ((x)->umodes &= ~UMODE_INVISIBLE) #define IsSSLClient(x) ((x)->umodes & UMODE_SSLCLIENT) #define SetSSLClient(x) ((x)->umodes |= UMODE_SSLCLIENT) #define ClearSSLClient(x) ((x)->umodes &= ~UMODE_SSLCLIENT) #define SendWallops(x) ((x)->umodes & UMODE_WALLOP) #define SendLocops(x) ((x)->umodes & UMODE_LOCOPS) #define SendServNotice(x) ((x)->umodes & UMODE_SERVNOTICE) #define SendOperwall(x) ((x)->umodes & UMODE_OPERWALL) #define IsSetCallerId(x) ((x)->umodes & UMODE_CALLERID) #define IsService(x) ((x)->umodes & UMODE_SERVICE) #define IsDeaf(x) ((x)->umodes & UMODE_DEAF) #define IsNoForward(x) ((x)->umodes & UMODE_NOFORWARD) #define IsSetRegOnlyMsg(x) ((x)->umodes & UMODE_REGONLYMSG) #define SetGotId(x) ((x)->flags |= FLAGS_GOTID) #define IsGotId(x) (((x)->flags & FLAGS_GOTID) != 0) /* * flags2 macros. */ #define IsExemptKline(x) ((x)->flags2 & FLAGS2_EXEMPTKLINE) #define SetExemptKline(x) ((x)->flags2 |= FLAGS2_EXEMPTKLINE) #define IsExemptGline(x) ((x)->flags2 & FLAGS2_EXEMPTGLINE) #define SetExemptGline(x) ((x)->flags2 |= FLAGS2_EXEMPTGLINE) #define IsExemptFlood(x) ((x)->flags2 & FLAGS2_EXEMPTFLOOD) #define SetExemptFlood(x) ((x)->flags2 |= FLAGS2_EXEMPTFLOOD) #define IsExemptSpambot(x) ((x)->flags2 & FLAGS2_EXEMPTSPAMBOT) #define SetExemptSpambot(x) ((x)->flags2 |= FLAGS2_EXEMPTSPAMBOT) #define IsExemptShide(x) ((x)->flags2 & FLAGS2_EXEMPTSHIDE) #define SetExemptShide(x) ((x)->flags2 |= FLAGS2_EXEMPTSHIDE) #define IsExemptJupe(x) ((x)->flags2 & FLAGS2_EXEMPTJUPE) #define SetExemptJupe(x) ((x)->flags2 |= FLAGS2_EXEMPTJUPE) #define IsExemptResv(x) ((x)->flags2 & FLAGS2_EXEMPTRESV) #define SetExemptResv(x) ((x)->flags2 |= FLAGS2_EXEMPTRESV) #define IsIPSpoof(x) ((x)->flags2 & FLAGS2_IP_SPOOFING) #define SetIPSpoof(x) ((x)->flags2 |= FLAGS2_IP_SPOOFING) /* for local users: flood grace period is over * for servers: mentioned in networknotice.c notice */ #define IsFloodDone(x) ((x)->flags & FLAGS_FLOODDONE) #define SetFloodDone(x) ((x)->flags |= FLAGS_FLOODDONE) /* These also operate on the uplink from which it came */ #define IsCork(x) (MyConnect(x) ? (x)->localClient->cork_count : (x)->from->localClient->cork_count) #define SetCork(x) (MyConnect(x) ? (x)->localClient->cork_count++ : (x)->from->localClient->cork_count++ ) #define ClearCork(x) (MyConnect(x) ? (x)->localClient->cork_count-- : (x)->from->localClient->cork_count--) /* * definitions for get_client_name */ #define HIDE_IP 0 #define SHOW_IP 1 #define MASK_IP 2 extern void check_banned_lines(void); extern void check_klines_event(void *unused); extern void check_klines(void); extern void check_glines(void); extern void check_dlines(void); extern void check_xlines(void); extern const char *get_client_name(struct Client *client, int show_ip); extern const char *get_server_name(struct Client *client, int show_ip); extern const char *log_client_name(struct Client *, int); extern int is_remote_connect(struct Client *); extern void init_client(void); extern client_t *make_client(struct Client *from); extern void free_pre_client(struct Client *client); extern void free_client(struct Client *client); extern int exit_client(struct Client *, struct Client *, struct Client *, const char *); extern void error_exit_client(struct Client *, int); extern void count_local_client_memory(size_t * count, size_t * memory); extern void count_remote_client_memory(size_t * count, size_t * memory); extern client_t *find_chasing(struct Client *, const char *, int *); extern client_t *find_person(const char *); extern client_t *find_named_person(const char *); extern client_t *next_client(struct Client *, const char *); #define accept_message(s, t) ((s) == (t) || (rb_dlinkFind((s), &((t)->localClient->allow_list)))) extern void del_all_accepts(struct Client *client_p); extern void dead_link(struct Client *client_p); extern int show_ip(struct Client *source_p, struct Client *target_p); extern int show_ip_conf(struct ConfItem *aconf, struct Client *target_p); extern void initUser(void); extern void free_user(struct User *, struct Client *); extern user_t *make_user(struct Client *); extern server_t *make_server(struct Client *); extern void close_connection(struct Client *); extern void init_uid(void); extern char *generate_uid(void); void allocate_away(struct Client *); void free_away(struct Client *); #endif /* INCLUDED_client_h */