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/* |
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* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
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* |
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* Copyright (c) 1997-2020 ircd-hybrid development team |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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* USA |
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*/ |
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|
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/*! \file client.h |
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* \brief Header including structures, macros and prototypes for client handling |
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* \version $Id$ |
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*/ |
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|
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|
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#ifndef INCLUDED_client_h |
| 29 |
#define INCLUDED_client_h |
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|
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#include "list.h" |
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#include "fdlist.h" |
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#include "ircd_defs.h" |
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#include "dbuf.h" |
| 35 |
#include "auth.h" |
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|
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|
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/* |
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* status macros. |
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*/ |
| 41 |
enum |
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{ |
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STAT_CONNECTING = 1, |
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STAT_HANDSHAKE, |
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STAT_ME, |
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STAT_UNKNOWN, |
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STAT_SERVER, |
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STAT_CLIENT |
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}; |
| 50 |
|
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enum |
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{ |
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REG_NEED_USER = 1 << 0, /**< User must send USER command */ |
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REG_NEED_NICK = 1 << 1, /**< User must send NICK command */ |
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REG_NEED_CAP = 1 << 2, /**< In middle of CAP negotiations */ |
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REG_INIT = REG_NEED_USER | REG_NEED_NICK |
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}; |
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|
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#define ID_or_name(x,client_p) ((IsServer(client_p->from) && (x)->id[0]) ? (x)->id : (x)->name) |
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|
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#define IsConnecting(x) ((x)->status == STAT_CONNECTING) |
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#define IsHandshake(x) ((x)->status == STAT_HANDSHAKE) |
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#define IsMe(x) ((x)->status == STAT_ME) |
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#define IsUnknown(x) ((x)->status == STAT_UNKNOWN) |
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#define IsServer(x) ((x)->status == STAT_SERVER) |
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#define IsClient(x) ((x)->status == STAT_CLIENT) |
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|
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#define SetConnecting(x) {(x)->status = STAT_CONNECTING; \ |
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(x)->handler = UNREGISTERED_HANDLER; } |
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|
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#define SetHandshake(x) {(x)->status = STAT_HANDSHAKE; \ |
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(x)->handler = UNREGISTERED_HANDLER; } |
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|
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#define SetMe(x) {(x)->status = STAT_ME; \ |
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(x)->handler = UNREGISTERED_HANDLER; } |
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|
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#define SetUnknown(x) {(x)->status = STAT_UNKNOWN; \ |
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(x)->handler = UNREGISTERED_HANDLER; } |
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|
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#define SetServer(x) {(x)->status = STAT_SERVER; \ |
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(x)->handler = SERVER_HANDLER; } |
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|
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#define SetClient(x) {(x)->status = STAT_CLIENT; \ |
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(x)->handler = CLIENT_HANDLER; } |
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|
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#define MyConnect(x) ((x)->connection != NULL) |
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#define MyClient(x) (MyConnect(x) && IsClient(x)) |
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|
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/* |
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* ts stuff |
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*/ |
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enum |
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{ |
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TS_CURRENT = 6, /**< Current TS protocol version */ |
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TS_MIN = 6 /**< Minimum supported TS protocol version */ |
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}; |
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|
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enum |
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{ |
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CAP_MULTI_PREFIX = 1 << 0, /**< ircv3.1 multi-prefix client capability */ |
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CAP_AWAY_NOTIFY = 1 << 1, /**< ircv3.1 away-notify client capability */ |
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CAP_UHNAMES = 1 << 2, /**< ircv3.2 userhost-in-names client capability */ |
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CAP_EXTENDED_JOIN = 1 << 3, /**< ircv3.1 extended-join client capability */ |
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CAP_ACCOUNT_NOTIFY = 1 << 4, /**< ircv3.1 account-notify client capability */ |
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CAP_INVITE_NOTIFY = 1 << 5, /**< ircv3.2 invite-notify client capability */ |
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CAP_CHGHOST = 1 << 6 /**< ircv3.2 chghost client capability */ |
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}; |
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|
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#define HasCap(x, y) ((x)->connection->cap_active & (y)) |
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|
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|
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/* housekeeping flags */ |
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enum |
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{ |
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FLAGS_PINGSENT = 1 << 0, /**< Unreplied ping sent */ |
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FLAGS_DEADSOCKET = 1 << 1, /**< Local socket is dead--Exiting soon */ |
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FLAGS_KILLED = 1 << 2, /**< Prevents "QUIT" from being sent for this */ |
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FLAGS_CLOSING = 1 << 3, /**< Set when closing to suppress errors */ |
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FLAGS_GOTID = 1 << 4, /**< Successful ident lookup achieved */ |
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FLAGS_SENDQEX = 1 << 5, /**< Sendq exceeded */ |
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FLAGS_IPHASH = 1 << 6, /**< Iphashed this client */ |
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FLAGS_MARK = 1 << 7, /**< Marked client */ |
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FLAGS_CANFLOOD = 1 << 8, /**< Client has the ability to flood */ |
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FLAGS_EXEMPTKLINE = 1 << 9, /**< Client is exempt from k-lines */ |
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FLAGS_NOLIMIT = 1 << 10, /**< Client is exempt from limits */ |
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FLAGS_PING_COOKIE = 1 << 11, /**< PING Cookie */ |
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FLAGS_FLOODDONE = 1 << 12, /**< Flood grace period has been ended. */ |
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FLAGS_EOB = 1 << 13, /**< Server has sent us an EOB */ |
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FLAGS_HIDDEN = 1 << 14, /**< A hidden server. Not shown in /links */ |
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FLAGS_BLOCKED = 1 << 15, /**< Must wait for COMM_SELECT_WRITE */ |
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FLAGS_EXEMPTRESV = 1 << 16, /**< Client is exempt from RESV */ |
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FLAGS_GOTUSER = 1 << 17, /**< If we received a USER command */ |
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FLAGS_FINISHED_AUTH = 1 << 18, /**< Client has been released from auth */ |
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FLAGS_FLOOD_NOTICED = 1 << 19, /**< Notice to opers about this flooder has been sent */ |
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FLAGS_SERVICE = 1 << 20, /**< Client/server is a network service */ |
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FLAGS_TLS = 1 << 21, /**< User is connected via TLS (Transport Layer Security) */ |
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FLAGS_SQUIT = 1 << 22, |
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FLAGS_EXEMPTXLINE = 1 << 23 /**< Client is exempt from x-lines */ |
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}; |
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|
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#define HasFlag(x, y) ((x)->flags & (y)) |
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#define AddFlag(x, y) ((x)->flags |= (y)) |
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#define DelFlag(x, y) ((x)->flags &= ~(y)) |
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|
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|
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/* umodes, settable flags */ |
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enum |
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{ |
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UMODE_SERVNOTICE = 1 << 0, /**< Server notices such as kill */ |
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UMODE_CCONN = 1 << 1, /**< Can see client connection notices */ |
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UMODE_REJ = 1 << 2, /**< Bot Rejections */ |
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UMODE_SKILL = 1 << 3, /**< Server Killed */ |
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UMODE_FULL = 1 << 4, /**< Full messages */ |
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UMODE_SPY = 1 << 5, /**< See STATS / LINKS */ |
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UMODE_DEBUG = 1 << 6, /**< 'debugging' info */ |
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UMODE_NCHANGE = 1 << 7, /**< Nick change notice */ |
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UMODE_WALLOP = 1 << 8, /**< Send wallops to them */ |
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UMODE_INVISIBLE = 1 << 9, /**< Makes user invisible */ |
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UMODE_BOTS = 1 << 10, /**< Shows bots */ |
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UMODE_EXTERNAL = 1 << 11, /**< Show servers introduced and splitting */ |
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UMODE_CALLERID = 1 << 12, /**< Block unless caller id's */ |
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UMODE_SOFTCALLERID = 1 << 13, /**< Block unless on common channel */ |
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UMODE_UNAUTH = 1 << 14, /**< Show unauth connects here */ |
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UMODE_LOCOPS = 1 << 15, /**< Can see LOCOPS messages */ |
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UMODE_DEAF = 1 << 16, /**< Don't receive channel messages */ |
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UMODE_REGISTERED = 1 << 17, /**< User has identified for that nick. */ |
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UMODE_REGONLY = 1 << 18, /**< Only registered nicks may PM */ |
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UMODE_HIDDEN = 1 << 19, /**< IRC operator status is hidden */ |
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UMODE_OPER = 1 << 20, /**< IRC operator */ |
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UMODE_ADMIN = 1 << 21, /**< Admin on server */ |
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UMODE_FARCONNECT = 1 << 22, /**< Can see remote client connects/exits */ |
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UMODE_SECURE = 1 << 23, /**< User is connected via TLS */ |
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UMODE_WEBIRC = 1 << 24, /**< User connected via a webirc gateway */ |
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UMODE_HIDEIDLE = 1 << 25, /**< Hides idle and signon time in WHOIS */ |
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UMODE_HIDECHANS = 1 << 26, /**< Hides channel list in WHOIS */ |
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UMODE_EXPIRATION = 1 << 27 /**< Receives *LINE expiration notices */ |
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}; |
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|
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#define HasUMode(x, y) ((x)->umodes & (y)) |
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#define AddUMode(x, y) ((x)->umodes |= (y)) |
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#define DelUMode(x, y) ((x)->umodes &= ~(y)) |
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|
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|
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/** irc-operator privilege flags */ |
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enum |
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{ |
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OPER_FLAG_ADMIN = 1 << 0, /**< Oper can set user mode +a */ |
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OPER_FLAG_CLOSE = 1 << 1, /**< Oper can use CLOSE command */ |
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OPER_FLAG_CONNECT = 1 << 2, /**< Oper can do local CONNECT */ |
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OPER_FLAG_CONNECT_REMOTE = 1 << 3, /**< Oper can do remote CONNECT */ |
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OPER_FLAG_DIE = 1 << 4, /**< Oper can use DIE command */ |
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OPER_FLAG_DLINE = 1 << 5, /**< Oper can use DLINE command */ |
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OPER_FLAG_GLOBOPS = 1 << 6, /**< Oper can use GLOBOPS command */ |
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OPER_FLAG_JOIN_RESV = 1 << 7, /**< Oper can use JOIN on resv {} channels */ |
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OPER_FLAG_KILL = 1 << 8, /**< Oper can KILL local users */ |
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OPER_FLAG_KILL_REMOTE = 1 << 9, /**< Oper can KILL remote users */ |
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OPER_FLAG_KLINE = 1 << 10, /**< Oper can use KLINE command */ |
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OPER_FLAG_LOCOPS = 1 << 11, /**< Oper can use LOCOPS command */ |
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OPER_FLAG_MODULE = 1 << 12, /**< Oper can use MODULE command */ |
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OPER_FLAG_NICK_RESV = 1 << 13, /**< Oper can use NICK on resv {} nicks */ |
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OPER_FLAG_OPME = 1 << 14, /**< Oper can use OPME command */ |
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OPER_FLAG_REHASH = 1 << 15, /**< Oper can use REHASH command */ |
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OPER_FLAG_REHASH_REMOTE = 1 << 16, /**< Oper can do remote REHASH command */ |
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OPER_FLAG_REMOTEBAN = 1 << 17, /**< Oper can set remote bans */ |
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OPER_FLAG_RESTART = 1 << 18, /**< Oper can use RESTART command */ |
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OPER_FLAG_RESV = 1 << 19, /**< Oper can use RESV command */ |
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OPER_FLAG_SET = 1 << 20, /**< Oper can use SET command */ |
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OPER_FLAG_SQUIT = 1 << 21, /**< Oper can do local SQUIT */ |
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OPER_FLAG_SQUIT_REMOTE = 1 << 22, /**< Oper can do remote SQUIT */ |
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OPER_FLAG_UNDLINE = 1 << 23, /**< Oper can use UNDLINE command */ |
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OPER_FLAG_UNKLINE = 1 << 24, /**< Oper can use UNKLINE command */ |
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OPER_FLAG_UNRESV = 1 << 25, /**< Oper can use UNRESV command */ |
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OPER_FLAG_UNXLINE = 1 << 26, /**< Oper can use UNXLINE command */ |
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OPER_FLAG_WALLOPS = 1 << 27, /**< Oper can use WALLOPS command */ |
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OPER_FLAG_XLINE = 1 << 28 /**< Oper can use XLINE command */ |
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}; |
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|
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#define HasOFlag(x, y) ((x)->connection->operflags & (y)) |
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#define AddOFlag(x, y) ((x)->connection->operflags |= (y)) |
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#define DelOFlag(x, y) ((x)->connection->operflags &= ~(y)) |
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#define ClrOFlag(x) ((x)->connection->operflags = 0) |
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|
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|
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|
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/* flags macros. */ |
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#define IsDead(x) ((x)->flags & FLAGS_DEADSOCKET) |
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#define SetDead(x) ((x)->flags |= FLAGS_DEADSOCKET) |
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#define IsDefunct(x) ((x)->flags & (FLAGS_DEADSOCKET|FLAGS_CLOSING|FLAGS_KILLED)) |
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|
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/* oper flags */ |
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#define SetOper(x) {(x)->umodes |= UMODE_OPER; \ |
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if (MyClient((x))) (x)->handler = OPER_HANDLER;} |
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|
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#define ClearOper(x) {(x)->umodes &= ~(UMODE_OPER|UMODE_ADMIN); \ |
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if (MyClient((x))) \ |
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(x)->handler = CLIENT_HANDLER; } |
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|
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#define IsFloodDone(x) ((x)->flags & FLAGS_FLOODDONE) |
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#define IsHidden(x) ((x)->flags & FLAGS_HIDDEN) |
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|
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|
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/*! \brief server ban types */ |
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enum |
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{ |
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CLIENT_BAN_KLINE, |
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CLIENT_BAN_DLINE, |
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CLIENT_BAN_XLINE |
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}; |
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|
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/*! \brief addr_mask_type enumeration */ |
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enum addr_mask_type |
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{ |
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HIDE_IP, /**< IP is hidden. Resolved hostname is shown instead */ |
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SHOW_IP, /**< IP is shown. No parts of it are hidden or masked */ |
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MASK_IP /**< IP is masked. 255.255.255.255 is shown instead */ |
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}; |
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|
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/*! \brief Server structure */ |
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struct Server |
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{ |
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dlink_list server_list; /**< Servers on this server */ |
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dlink_list client_list; /**< Clients on this server */ |
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char by[NICKLEN + 1]; /**< Who activated this connection */ |
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}; |
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|
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/*! \brief ListTask structure */ |
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struct ListTask |
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{ |
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dlink_node node; /**< Embedded list node used to link into listing_client_list */ |
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dlink_list show_mask; /**< Channels to show */ |
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dlink_list hide_mask; /**< Channels to hide */ |
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|
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unsigned int hash_index; /**< The hash bucket we are currently in */ |
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unsigned int users_min; |
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unsigned int users_max; |
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unsigned int created_min; /**< Real time */ |
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unsigned int created_max; /**< Real time */ |
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unsigned int topicts_min; /**< Real time */ |
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unsigned int topicts_max; /**< Real time */ |
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char topic[TOPICLEN + 1]; |
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}; |
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|
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/*! \brief Connection structure |
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* |
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* Allocated only for local clients, that are directly connected |
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* to \b this server with a socket. |
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*/ |
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struct Connection |
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{ |
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dlink_node lclient_node; |
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|
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unsigned int registration; |
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unsigned int cap_client; /**< Client capabilities (from us) */ |
| 294 |
unsigned int cap_active; /**< Active capabilities (to us) */ |
| 295 |
unsigned int caps; /**< Capabilities bit-field */ |
| 296 |
|
| 297 |
unsigned int operflags; /**< IRC Operator privilege flags */ |
| 298 |
unsigned int random_ping; /**< Holding a 32bit value used for PING cookies */ |
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|
| 300 |
uintmax_t serial; /**< Used to enforce 1 send per nick */ |
| 301 |
uintmax_t last_data; /**< Last time data read from socket; monotonic time */ |
| 302 |
uintmax_t last_ping; /**< Last time data read from socket; currently this is a copy of last_data |
| 303 |
which can be modified by check_pings_list; monotonic time */ |
| 304 |
uintmax_t created_real; /**< Time client was created; real time */ |
| 305 |
uintmax_t created_monotonic; /**< Time client was created; monotonic time */ |
| 306 |
uintmax_t last_caller_id_time; /**< Monotonic time */ |
| 307 |
uintmax_t first_received_message_time; /**< Monotonic time */ |
| 308 |
uintmax_t last_privmsg; /**< Last time we got a PRIVMSG; monotonic time */ |
| 309 |
uintmax_t last_join_time; /**< When this client last joined a channel; monotonic time */ |
| 310 |
uintmax_t last_leave_time; /**< When this client last left a channel; monotonic time */ |
| 311 |
|
| 312 |
unsigned int join_leave_count; /**< Count of JOIN/LEAVE in less than MIN_JOIN_LEAVE_TIME seconds */ |
| 313 |
unsigned int oper_warn_count_down; /**< Warn opers of this possible spambot every time this gets to 0 */ |
| 314 |
unsigned int received_number_of_privmsgs; |
| 315 |
|
| 316 |
struct ListTask *list_task; |
| 317 |
|
| 318 |
struct dbuf_queue buf_sendq; |
| 319 |
struct dbuf_queue buf_recvq; |
| 320 |
|
| 321 |
struct |
| 322 |
{ |
| 323 |
unsigned int messages; /**< Statistics: protocol messages sent/received */ |
| 324 |
uintmax_t bytes; /**< Statistics: total bytes sent/received */ |
| 325 |
} recv, send; |
| 326 |
|
| 327 |
struct |
| 328 |
{ |
| 329 |
unsigned int count; /**< How many AWAY/INVITE/KNOCK/NICK requests client has sent */ |
| 330 |
uintmax_t last_attempt; /**< Last time the AWAY/INVITE/KNOCK/NICK request was issued; monotonic time */ |
| 331 |
} away, invite, knock, nick; |
| 332 |
|
| 333 |
struct AuthRequest *auth; |
| 334 |
struct Listener *listener; /**< Listener accepted from */ |
| 335 |
dlink_list acceptlist; /**< Clients I'll allow to talk to me */ |
| 336 |
dlink_list watches; /**< Chain of Watch pointer blocks */ |
| 337 |
dlink_list confs; /**< Configuration record associated */ |
| 338 |
dlink_list invited; /**< Chain of invite pointer blocks */ |
| 339 |
|
| 340 |
fde_t *fd; /**< Pointer to fdlist.c:fd_table[] */ |
| 341 |
|
| 342 |
/* Anti-flood stuff. We track how many messages were parsed and how |
| 343 |
* many we were allowed in the current second, and apply a simple |
| 344 |
* decay to avoid flooding. |
| 345 |
* -- adrian |
| 346 |
*/ |
| 347 |
int sent_parsed; /**< How many messages we've parsed in this second */ |
| 348 |
|
| 349 |
char *password; /**< Password supplied by the client/server */ |
| 350 |
}; |
| 351 |
|
| 352 |
/*! \brief Client structure */ |
| 353 |
struct Client |
| 354 |
{ |
| 355 |
dlink_node node; |
| 356 |
dlink_node lnode; /**< Used for Server->servers/users */ |
| 357 |
|
| 358 |
struct Connection *connection; /**< Connection structure associated with this client */ |
| 359 |
struct Client *hnext; /**< For client hash table lookups by name */ |
| 360 |
struct Client *idhnext; /**< For SID hash table lookups by sid */ |
| 361 |
struct Server *serv; /**< ...defined, if this is a server */ |
| 362 |
struct Client *servptr; /**< Points to server this Client is on */ |
| 363 |
struct Client *from; /**< == self, if Local Client, *NEVER* NULL! */ |
| 364 |
|
| 365 |
uintmax_t tsinfo; /**< Timestamp on this nick; real time */ |
| 366 |
|
| 367 |
unsigned int flags; /**< Client flags */ |
| 368 |
unsigned int umodes; /**< User modes this client has set */ |
| 369 |
unsigned int hopcount; /**< Number of servers to this 0 = local */ |
| 370 |
unsigned int status; /**< Client type */ |
| 371 |
unsigned int handler; /**< Handler index */ |
| 372 |
|
| 373 |
dlink_list whowas_list; |
| 374 |
dlink_list channel; /**< Chain of channel pointer blocks */ |
| 375 |
dlink_list svstags; /**< List of ServicesTag items */ |
| 376 |
|
| 377 |
struct irc_ssaddr ip; /**< Real IP address */ |
| 378 |
|
| 379 |
char *certfp; /**< TLS certificate fingerprint */ |
| 380 |
|
| 381 |
char away[AWAYLEN + 1]; /**< Client's AWAY message. Can be set/unset via AWAY command */ |
| 382 |
char name[HOSTLEN + 1]; /**< Unique name for a client nick or host */ |
| 383 |
char id[IDLEN + 1]; /**< Client ID, unique ID per client */ |
| 384 |
char account[ACCOUNTLEN + 1]; /**< Services account */ |
| 385 |
|
| 386 |
/* |
| 387 |
* client->username is the username from ident or the USER message, |
| 388 |
* If the client is idented the USER message is ignored, otherwise |
| 389 |
* the username part of the USER message is put here prefixed with a |
| 390 |
* tilde depending on the auth{} block. Once a client has registered, |
| 391 |
* this field should be considered read-only. |
| 392 |
*/ |
| 393 |
char username[USERLEN + 1]; /**< client's username */ |
| 394 |
|
| 395 |
/* |
| 396 |
* client->host contains the resolved name or ip address as a string |
| 397 |
* for the user, it may be fiddled with for oper spoofing etc. |
| 398 |
* once it's changed the *real* address goes away. |
| 399 |
*/ |
| 400 |
char host[HOSTLEN + 1]; /**< Client's hostname. Can be faked/spoofed */ |
| 401 |
|
| 402 |
/* |
| 403 |
* client->realhost contains the resolved name or ip address as a string |
| 404 |
* for the user. Once a client has registered, this field should be |
| 405 |
* considered read-only. |
| 406 |
*/ |
| 407 |
char realhost[HOSTLEN + 1]; /**< Client's real hostname */ |
| 408 |
|
| 409 |
|
| 410 |
/* |
| 411 |
* client->info for unix clients will normally contain the info from the |
| 412 |
* gcos field in /etc/passwd but anything can go here. |
| 413 |
*/ |
| 414 |
char info[REALLEN + 1]; /**< Free form additional client info */ |
| 415 |
|
| 416 |
/* |
| 417 |
* client->sockhost contains the ip address gotten from the socket as a |
| 418 |
* string, this field should be considered read-only once the connection |
| 419 |
* has been made. (set in s_bsd.c only) |
| 420 |
*/ |
| 421 |
char sockhost[HOSTIPLEN + 1]; /**< This is the host name from the socket ip address as string */ |
| 422 |
}; |
| 423 |
|
| 424 |
|
| 425 |
extern struct Client me; |
| 426 |
extern dlink_list listing_client_list; |
| 427 |
extern dlink_list global_client_list; |
| 428 |
extern dlink_list global_server_list; /* global servers on the network */ |
| 429 |
extern dlink_list local_client_list; /* local clients only ON this server */ |
| 430 |
extern dlink_list local_server_list; /* local servers to this server ONLY */ |
| 431 |
extern dlink_list unknown_list; /* unknown clients ON this server only */ |
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extern dlink_list oper_list; /* our opers, duplicated in local_client_list */ |
| 433 |
|
| 434 |
extern bool accept_message(struct Client *, struct Client *); |
| 435 |
extern unsigned int client_get_idle_time(const struct Client *, const struct Client *); |
| 436 |
extern struct split_nuh_item *find_accept(const char *, const char *, |
| 437 |
const char *, struct Client *, |
| 438 |
int (*)(const char *, const char *)); |
| 439 |
extern void del_accept(struct split_nuh_item *, struct Client *); |
| 440 |
extern void del_all_accepts(struct Client *); |
| 441 |
extern void exit_client(struct Client *, const char *); |
| 442 |
extern void conf_try_ban(struct Client *, int, const char *); |
| 443 |
extern void check_conf_klines(void); |
| 444 |
extern void client_init(void); |
| 445 |
extern void dead_link_on_write(struct Client *, int); |
| 446 |
extern void dead_link_on_read(struct Client *, int); |
| 447 |
extern void exit_aborted_clients(void); |
| 448 |
extern void free_exited_clients(void); |
| 449 |
extern struct Client *client_make(struct Client *); |
| 450 |
extern struct Client *find_chasing(struct Client *, const char *); |
| 451 |
extern struct Client *find_person(const struct Client *, const char *); |
| 452 |
extern const char *client_get_name(const struct Client *, enum addr_mask_type); |
| 453 |
#endif /* INCLUDED_client_h */ |
