1045 lines
27 KiB
C
1045 lines
27 KiB
C
/*
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* ircd-ratbox: A slightly useful ircd.
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* m_message.c: Sends a (PRIVMSG|NOTICE) message to a user or channel.
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*
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* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
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* Copyright (C) 1996-2002 Hybrid Development Team
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* Copyright (C) 2002-2005 ircd-ratbox 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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* $Id: m_message.c 3173 2007-01-31 23:57:18Z jilles $
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*/
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#include "stdinc.h"
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#include "client.h"
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#include "ircd.h"
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#include "numeric.h"
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#include "common.h"
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#include "s_conf.h"
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#include "s_serv.h"
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#include "msg.h"
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#include "parse.h"
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#include "modules.h"
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#include "channel.h"
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#include "irc_string.h"
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#include "hash.h"
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#include "class.h"
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#include "msg.h"
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#include "packet.h"
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#include "send.h"
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#include "event.h"
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#include "patricia.h"
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#include "s_newconf.h"
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#include "s_stats.h"
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static int m_message(int, const char *, struct Client *, struct Client *, int, const char **);
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static int m_privmsg(struct Client *, struct Client *, int, const char **);
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static int m_notice(struct Client *, struct Client *, int, const char **);
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static void expire_tgchange(void *unused);
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static int
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modinit(void)
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{
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eventAddIsh("expire_tgchange", expire_tgchange, NULL, 300);
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expire_tgchange(NULL);
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return 0;
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}
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static void
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moddeinit(void)
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{
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eventDelete(expire_tgchange, NULL);
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}
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struct Message privmsg_msgtab = {
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"PRIVMSG", 0, 0, 0, MFLG_SLOW | MFLG_UNREG,
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{mg_unreg, {m_privmsg, 0}, {m_privmsg, 0}, mg_ignore, mg_ignore, {m_privmsg, 0}}
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};
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struct Message notice_msgtab = {
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"NOTICE", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, {m_notice, 0}, {m_notice, 0}, {m_notice, 0}, mg_ignore, {m_notice, 0}}
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};
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mapi_clist_av1 message_clist[] = { &privmsg_msgtab, ¬ice_msgtab, NULL };
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DECLARE_MODULE_AV1(message, modinit, moddeinit, message_clist, NULL, NULL, "$Revision: 3173 $");
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struct entity
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{
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void *ptr;
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int type;
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int flags;
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};
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static int build_target_list(int p_or_n, const char *command,
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struct Client *client_p,
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struct Client *source_p, const char *nicks_channels, const char *text);
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static int flood_attack_client(int p_or_n, struct Client *source_p, struct Client *target_p);
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static int flood_attack_channel(int p_or_n, struct Client *source_p,
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struct Channel *chptr, char *chname);
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static struct Client *find_userhost(const char *, const char *, int *);
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#define ENTITY_NONE 0
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#define ENTITY_CHANNEL 1
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#define ENTITY_CHANOPS_ON_CHANNEL 2
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#define ENTITY_CLIENT 3
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static struct entity targets[512];
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static int ntargets = 0;
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static int duplicate_ptr(void *);
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static void msg_channel(int p_or_n, const char *command,
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struct Client *client_p,
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struct Client *source_p, struct Channel *chptr, const char *text);
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static void msg_channel_flags(int p_or_n, const char *command,
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struct Client *client_p,
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struct Client *source_p,
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struct Channel *chptr, int flags, const char *text);
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static void msg_client(int p_or_n, const char *command,
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struct Client *source_p, struct Client *target_p, const char *text);
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static void handle_special(int p_or_n, const char *command,
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struct Client *client_p, struct Client *source_p, const char *nick,
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const char *text);
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/*
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** m_privmsg
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**
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** massive cleanup
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** rev argv 6/91
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**
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** Another massive cleanup Nov, 2000
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** (I don't think there is a single line left from 6/91. Maybe.)
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** m_privmsg and m_notice do basically the same thing.
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** in the original 2.8.2 code base, they were the same function
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** "m_message.c." When we did the great cleanup in conjuncton with bleep
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** of ircu fame, we split m_privmsg.c and m_notice.c.
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** I don't see the point of that now. Its harder to maintain, its
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** easier to introduce bugs into one version and not the other etc.
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** Really, the penalty of an extra function call isn't that big a deal folks.
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** -db Nov 13, 2000
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**
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*/
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#define PRIVMSG 0
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#define NOTICE 1
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static int
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m_privmsg(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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return m_message(PRIVMSG, "PRIVMSG", client_p, source_p, parc, parv);
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}
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static int
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m_notice(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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return m_message(NOTICE, "NOTICE", client_p, source_p, parc, parv);
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}
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/*
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* inputs - flag privmsg or notice
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* - pointer to command "PRIVMSG" or "NOTICE"
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* - pointer to client_p
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* - pointer to source_p
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* - pointer to channel
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*/
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static int
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m_message(int p_or_n,
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const char *command,
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struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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int i;
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if(parc < 2 || EmptyString(parv[1]))
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{
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if(p_or_n != NOTICE)
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sendto_one(source_p, form_str(ERR_NORECIPIENT), me.name,
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source_p->name, command);
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return 0;
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}
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if(parc < 3 || EmptyString(parv[2]))
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{
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if(p_or_n != NOTICE)
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sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name);
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return 0;
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}
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/* Finish the flood grace period if theyre not messaging themselves
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* as some clients (ircN) do this as a "lag check"
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*/
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if(MyClient(source_p) && !IsFloodDone(source_p) && irccmp(source_p->name, parv[1]))
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flood_endgrace(source_p);
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if(build_target_list(p_or_n, command, client_p, source_p, parv[1], parv[2]) < 0)
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{
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return 0;
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}
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for(i = 0; i < ntargets; i++)
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{
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switch (targets[i].type)
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{
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case ENTITY_CHANNEL:
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msg_channel(p_or_n, command, client_p, source_p,
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(struct Channel *) targets[i].ptr, parv[2]);
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break;
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case ENTITY_CHANOPS_ON_CHANNEL:
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msg_channel_flags(p_or_n, command, client_p, source_p,
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(struct Channel *) targets[i].ptr,
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targets[i].flags, parv[2]);
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break;
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case ENTITY_CLIENT:
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msg_client(p_or_n, command, source_p,
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(struct Client *) targets[i].ptr, parv[2]);
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break;
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}
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}
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return 0;
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}
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/*
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* build_target_list
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*
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* inputs - pointer to given client_p (server)
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* - pointer to given source (oper/client etc.)
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* - pointer to list of nicks/channels
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* - pointer to table to place results
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* - pointer to text (only used if source_p is an oper)
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* output - number of valid entities
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* side effects - target_table is modified to contain a list of
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* pointers to channels or clients
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* if source client is an oper
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* all the classic old bizzare oper privmsg tricks
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* are parsed and sent as is, if prefixed with $
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* to disambiguate.
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*
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*/
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static int
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build_target_list(int p_or_n, const char *command, struct Client *client_p,
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struct Client *source_p, const char *nicks_channels, const char *text)
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{
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int type;
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char *p, *nick, *target_list;
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struct Channel *chptr = NULL;
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struct Client *target_p;
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target_list = LOCAL_COPY(nicks_channels); /* skip strcpy for non-lazyleafs */
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ntargets = 0;
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for(nick = strtoken(&p, target_list, ","); nick; nick = strtoken(&p, NULL, ","))
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{
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char *with_prefix;
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/*
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* channels are privmsg'd a lot more than other clients, moved up
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* here plain old channel msg?
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*/
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if(IsChanPrefix(*nick))
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{
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/* ignore send of local channel to a server (should not happen) */
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if(IsServer(client_p) && *nick == '&')
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continue;
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if((chptr = find_channel(nick)) != NULL)
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{
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if(!duplicate_ptr(chptr))
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{
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if(ntargets >= ConfigFileEntry.max_targets)
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{
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sendto_one(source_p, form_str(ERR_TOOMANYTARGETS),
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me.name, source_p->name, nick);
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return (1);
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}
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targets[ntargets].ptr = (void *) chptr;
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targets[ntargets++].type = ENTITY_CHANNEL;
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}
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}
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/* non existant channel */
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else if(p_or_n != NOTICE)
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sendto_one_numeric(source_p, ERR_NOSUCHNICK,
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form_str(ERR_NOSUCHNICK), nick);
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continue;
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}
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if(MyClient(source_p))
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target_p = find_named_person(nick);
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else
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target_p = find_person(nick);
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/* look for a privmsg to another client */
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if(target_p)
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{
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if(!duplicate_ptr(target_p))
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{
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if(ntargets >= ConfigFileEntry.max_targets)
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{
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sendto_one(source_p, form_str(ERR_TOOMANYTARGETS),
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me.name, source_p->name, nick);
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return (1);
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}
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targets[ntargets].ptr = (void *) target_p;
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targets[ntargets].type = ENTITY_CLIENT;
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targets[ntargets++].flags = 0;
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}
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continue;
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}
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/* @#channel or +#channel message ? */
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type = 0;
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with_prefix = nick;
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/* allow %+@ if someone wants to do that */
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for(;;)
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{
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if(*nick == '@')
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type |= CHFL_CHANOP;
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else if(*nick == '+')
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type |= CHFL_CHANOP | CHFL_VOICE;
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else
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break;
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nick++;
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}
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if(type != 0)
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{
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/* no recipient.. */
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if(EmptyString(nick))
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{
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sendto_one(source_p, form_str(ERR_NORECIPIENT),
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me.name, source_p->name, command);
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continue;
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}
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/* At this point, nick+1 should be a channel name i.e. #foo or &foo
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* if the channel is found, fine, if not report an error
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*/
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if((chptr = find_channel(nick)) != NULL)
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{
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struct membership *msptr;
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msptr = find_channel_membership(chptr, source_p);
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if(!IsServer(source_p) && !IsService(source_p) && !is_chanop_voiced(msptr))
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{
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sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
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me.name, source_p->name, with_prefix);
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return (-1);
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}
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if(!duplicate_ptr(chptr))
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{
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if(ntargets >= ConfigFileEntry.max_targets)
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{
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sendto_one(source_p, form_str(ERR_TOOMANYTARGETS),
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me.name, source_p->name, nick);
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return (1);
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}
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targets[ntargets].ptr = (void *) chptr;
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targets[ntargets].type = ENTITY_CHANOPS_ON_CHANNEL;
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targets[ntargets++].flags = type;
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}
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}
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else if(p_or_n != NOTICE)
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{
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sendto_one_numeric(source_p, ERR_NOSUCHNICK,
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form_str(ERR_NOSUCHNICK), nick);
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}
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continue;
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}
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if(strchr(nick, '@') || (IsOper(source_p) && (*nick == '$')))
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{
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handle_special(p_or_n, command, client_p, source_p, nick, text);
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continue;
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}
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/* no matching anything found - error if not NOTICE */
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if(p_or_n != NOTICE)
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{
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/* dont give this numeric when source is local,
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* because its misleading --anfl
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*/
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if(!MyClient(source_p) && IsDigit(*nick))
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sendto_one(source_p, ":%s %d %s * :Target left IRC. "
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"Failed to deliver: [%.20s]",
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get_id(&me, source_p), ERR_NOSUCHNICK,
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get_id(source_p, source_p), text);
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else
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sendto_one_numeric(source_p, ERR_NOSUCHNICK,
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form_str(ERR_NOSUCHNICK), nick);
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}
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}
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return (1);
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}
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/*
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* duplicate_ptr
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*
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* inputs - pointer to check
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* - pointer to table of entities
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* - number of valid entities so far
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* output - YES if duplicate pointer in table, NO if not.
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* note, this does the canonize using pointers
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* side effects - NONE
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*/
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static int
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duplicate_ptr(void *ptr)
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{
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int i;
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for(i = 0; i < ntargets; i++)
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if(targets[i].ptr == ptr)
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return YES;
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return NO;
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}
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|
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/*
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* msg_channel
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*
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* inputs - flag privmsg or notice
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* - pointer to command "PRIVMSG" or "NOTICE"
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* - pointer to client_p
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* - pointer to source_p
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* - pointer to channel
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* output - NONE
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* side effects - message given channel
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*
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* XXX - We need to rework this a bit, it's a tad ugly. --nenolod
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*/
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static void
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msg_channel(int p_or_n, const char *command,
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struct Client *client_p, struct Client *source_p, struct Channel *chptr,
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const char *text)
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{
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int result;
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char text2[BUFSIZE];
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if(MyClient(source_p))
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{
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/* idle time shouldnt be reset by notices --fl */
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if(p_or_n != NOTICE)
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source_p->localClient->last = CurrentTime;
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}
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if(chptr->mode.mode & MODE_NOCOLOR)
|
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{
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strlcpy(text2, text, BUFSIZE);
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strip_colour(text2);
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text = text2;
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if (EmptyString(text))
|
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{
|
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/* could be empty after colour stripping and
|
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* that would cause problems later */
|
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if(p_or_n != NOTICE)
|
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sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name);
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return;
|
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}
|
|
}
|
|
|
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/* chanops and voiced can flood their own channel with impunity */
|
|
if((result = can_send(chptr, source_p, NULL)))
|
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{
|
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if(result == CAN_SEND_OPV ||
|
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!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname))
|
|
{
|
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sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr,
|
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"%s %s :%s", command, chptr->chname, text);
|
|
}
|
|
}
|
|
else if(chptr->mode.mode & MODE_OPMODERATE &&
|
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chptr->mode.mode & MODE_MODERATED &&
|
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IsMember(source_p, chptr))
|
|
{
|
|
/* only do +z for +m channels for now, as bans/quiets
|
|
* aren't tested for remote clients -- jilles */
|
|
if(!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname))
|
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{
|
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sendto_channel_flags(client_p, ONLY_CHANOPS, source_p, chptr,
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"%s %s :%s", command, chptr->chname, text);
|
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}
|
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}
|
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else
|
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{
|
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if(p_or_n != NOTICE)
|
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sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN,
|
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form_str(ERR_CANNOTSENDTOCHAN), chptr->chname);
|
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}
|
|
}
|
|
|
|
/*
|
|
* msg_channel_flags
|
|
*
|
|
* inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
|
|
* say NOTICE must not auto reply
|
|
* - pointer to command, "PRIVMSG" or "NOTICE"
|
|
* - pointer to client_p
|
|
* - pointer to source_p
|
|
* - pointer to channel
|
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* - flags
|
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* - pointer to text to send
|
|
* output - NONE
|
|
* side effects - message given channel either chanop or voice
|
|
*/
|
|
static void
|
|
msg_channel_flags(int p_or_n, const char *command, struct Client *client_p,
|
|
struct Client *source_p, struct Channel *chptr, int flags, const char *text)
|
|
{
|
|
int type;
|
|
char c;
|
|
|
|
if(flags & CHFL_VOICE)
|
|
{
|
|
type = ONLY_CHANOPSVOICED;
|
|
c = '+';
|
|
}
|
|
else
|
|
{
|
|
type = ONLY_CHANOPS;
|
|
c = '@';
|
|
}
|
|
|
|
if(MyClient(source_p))
|
|
{
|
|
/* idletime shouldnt be reset by notice --fl */
|
|
if(p_or_n != NOTICE)
|
|
source_p->localClient->last = CurrentTime;
|
|
}
|
|
|
|
sendto_channel_flags(client_p, type, source_p, chptr, "%s %c%s :%s",
|
|
command, c, chptr->chname, text);
|
|
}
|
|
|
|
#define PREV_FREE_TARGET(x) ((FREE_TARGET(x) == 0) ? 9 : FREE_TARGET(x) - 1)
|
|
#define PREV_TARGET(i) ((i == 0) ? i = 9 : --i)
|
|
#define NEXT_TARGET(i) ((i == 9) ? i = 0 : ++i)
|
|
|
|
static void
|
|
expire_tgchange(void *unused)
|
|
{
|
|
tgchange *target;
|
|
dlink_node *ptr, *next_ptr;
|
|
|
|
DLINK_FOREACH_SAFE(ptr, next_ptr, tgchange_list.head)
|
|
{
|
|
target = ptr->data;
|
|
|
|
if(target->expiry < CurrentTime)
|
|
{
|
|
dlinkDelete(ptr, &tgchange_list);
|
|
patricia_remove(tgchange_tree, target->pnode);
|
|
MyFree(target->ip);
|
|
MyFree(target);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
add_target(struct Client *source_p, struct Client *target_p)
|
|
{
|
|
int i, j;
|
|
uint32_t hashv;
|
|
|
|
/* can msg themselves or services without using any target slots */
|
|
if(source_p == target_p || IsService(target_p))
|
|
return 1;
|
|
|
|
/* special condition for those who have had PRIVMSG crippled to allow them
|
|
* to talk to IRCops still.
|
|
*
|
|
* XXX: is this controversial?
|
|
*/
|
|
if(source_p->localClient->target_last > CurrentTime && IsOper(target_p))
|
|
return 1;
|
|
|
|
hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32);
|
|
|
|
if(USED_TARGETS(source_p))
|
|
{
|
|
/* hunt for an existing target */
|
|
for(i = PREV_FREE_TARGET(source_p), j = USED_TARGETS(source_p);
|
|
j; --j, PREV_TARGET(i))
|
|
{
|
|
if(source_p->localClient->targets[i] == hashv)
|
|
return 1;
|
|
}
|
|
|
|
/* first message after connect, we may only start clearing
|
|
* slots after this message --anfl
|
|
*/
|
|
if(!IsTGChange(source_p))
|
|
{
|
|
SetTGChange(source_p);
|
|
source_p->localClient->target_last = CurrentTime;
|
|
}
|
|
/* clear as many targets as we can */
|
|
else if((i = (CurrentTime - source_p->localClient->target_last) / 60))
|
|
{
|
|
if(i > USED_TARGETS(source_p))
|
|
USED_TARGETS(source_p) = 0;
|
|
else
|
|
USED_TARGETS(source_p) -= i;
|
|
|
|
source_p->localClient->target_last = CurrentTime;
|
|
}
|
|
/* cant clear any, full target list */
|
|
else if(USED_TARGETS(source_p) == 10)
|
|
{
|
|
ServerStats->is_tgch++;
|
|
add_tgchange(source_p->sockhost);
|
|
return 0;
|
|
}
|
|
}
|
|
/* no targets in use, reset their target_last so that they cant
|
|
* abuse a long idle to get targets back more quickly
|
|
*/
|
|
else
|
|
{
|
|
source_p->localClient->target_last = CurrentTime;
|
|
SetTGChange(source_p);
|
|
}
|
|
|
|
source_p->localClient->targets[FREE_TARGET(source_p)] = hashv;
|
|
NEXT_TARGET(FREE_TARGET(source_p));
|
|
++USED_TARGETS(source_p);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* msg_client
|
|
*
|
|
* inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
|
|
* say NOTICE must not auto reply
|
|
* - pointer to command, "PRIVMSG" or "NOTICE"
|
|
* - pointer to source_p source (struct Client *)
|
|
* - pointer to target_p target (struct Client *)
|
|
* - pointer to text
|
|
* output - NONE
|
|
* side effects - message given channel either chanop or voice
|
|
*/
|
|
static void
|
|
msg_client(int p_or_n, const char *command,
|
|
struct Client *source_p, struct Client *target_p, const char *text)
|
|
{
|
|
if(MyClient(source_p))
|
|
{
|
|
/* reset idle time for message only if its not to self
|
|
* and its not a notice */
|
|
if(p_or_n != NOTICE)
|
|
source_p->localClient->last = CurrentTime;
|
|
|
|
/* target change stuff, dont limit ctcp replies as that
|
|
* would allow people to start filling up random users
|
|
* targets just by ctcping them
|
|
*/
|
|
if((p_or_n != NOTICE || *text != '\001') &&
|
|
ConfigFileEntry.target_change && !IsOper(source_p))
|
|
{
|
|
if(!add_target(source_p, target_p))
|
|
{
|
|
sendto_one(source_p, form_str(ERR_TARGCHANGE),
|
|
me.name, source_p->name, target_p->name);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
else if(source_p->from == target_p->from)
|
|
{
|
|
sendto_realops_snomask(SNO_DEBUG, L_ALL,
|
|
"Send message to %s[%s] dropped from %s(Fake Dir)",
|
|
target_p->name, target_p->from->name, source_p->name);
|
|
return;
|
|
}
|
|
|
|
if(MyConnect(source_p) && (p_or_n != NOTICE) && target_p->user && target_p->user->away)
|
|
sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
|
|
target_p->name, target_p->user->away);
|
|
|
|
if(MyClient(target_p))
|
|
{
|
|
/* XXX Controversial? allow opers always to send through a +g */
|
|
if(!IsServer(source_p) && (IsSetCallerId(target_p) ||
|
|
(IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0])))
|
|
{
|
|
/* Here is the anti-flood bot/spambot code -db */
|
|
if(accept_message(source_p, target_p) || IsOper(source_p))
|
|
{
|
|
sendto_one(target_p, ":%s!%s@%s %s %s :%s",
|
|
source_p->name,
|
|
source_p->username,
|
|
source_p->host, command, target_p->name, text);
|
|
}
|
|
else if (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0])
|
|
{
|
|
if (p_or_n != NOTICE)
|
|
sendto_one_numeric(source_p, ERR_NONONREG,
|
|
form_str(ERR_NONONREG),
|
|
target_p->name);
|
|
/* Only so opers can watch for floods */
|
|
(void) flood_attack_client(p_or_n, source_p, target_p);
|
|
}
|
|
else
|
|
{
|
|
/* check for accept, flag recipient incoming message */
|
|
if(p_or_n != NOTICE)
|
|
{
|
|
sendto_one_numeric(source_p, ERR_TARGUMODEG,
|
|
form_str(ERR_TARGUMODEG),
|
|
target_p->name);
|
|
}
|
|
|
|
if((target_p->localClient->last_caller_id_time +
|
|
ConfigFileEntry.caller_id_wait) < CurrentTime)
|
|
{
|
|
if(p_or_n != NOTICE)
|
|
sendto_one_numeric(source_p, RPL_TARGNOTIFY,
|
|
form_str(RPL_TARGNOTIFY),
|
|
target_p->name);
|
|
|
|
sendto_one(target_p, form_str(RPL_UMODEGMSG),
|
|
me.name, target_p->name, source_p->name,
|
|
source_p->username, source_p->host);
|
|
|
|
target_p->localClient->last_caller_id_time = CurrentTime;
|
|
}
|
|
/* Only so opers can watch for floods */
|
|
(void) flood_attack_client(p_or_n, source_p, target_p);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* If the client is remote, we dont perform a special check for
|
|
* flooding.. as we wouldnt block their message anyway.. this means
|
|
* we dont give warnings.. we then check if theyre opered
|
|
* (to avoid flood warnings), lastly if theyre our client
|
|
* and flooding -- fl */
|
|
if(!MyClient(source_p) || IsOper(source_p) ||
|
|
!flood_attack_client(p_or_n, source_p, target_p))
|
|
sendto_anywhere(target_p, source_p, command, ":%s", text);
|
|
}
|
|
}
|
|
else if(!MyClient(source_p) || IsOper(source_p) ||
|
|
!flood_attack_client(p_or_n, source_p, target_p))
|
|
sendto_anywhere(target_p, source_p, command, ":%s", text);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* flood_attack_client
|
|
* inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
|
|
* say NOTICE must not auto reply
|
|
* - pointer to source Client
|
|
* - pointer to target Client
|
|
* output - 1 if target is under flood attack
|
|
* side effects - check for flood attack on target target_p
|
|
*/
|
|
static int
|
|
flood_attack_client(int p_or_n, struct Client *source_p, struct Client *target_p)
|
|
{
|
|
int delta;
|
|
|
|
if(GlobalSetOptions.floodcount && MyConnect(target_p) && IsClient(source_p))
|
|
{
|
|
if((target_p->localClient->first_received_message_time + 1) < CurrentTime)
|
|
{
|
|
delta = CurrentTime - target_p->localClient->first_received_message_time;
|
|
target_p->localClient->received_number_of_privmsgs -= delta;
|
|
target_p->localClient->first_received_message_time = CurrentTime;
|
|
if(target_p->localClient->received_number_of_privmsgs <= 0)
|
|
{
|
|
target_p->localClient->received_number_of_privmsgs = 0;
|
|
target_p->localClient->flood_noticed = 0;
|
|
}
|
|
}
|
|
|
|
if((target_p->localClient->received_number_of_privmsgs >=
|
|
GlobalSetOptions.floodcount) || target_p->localClient->flood_noticed)
|
|
{
|
|
if(target_p->localClient->flood_noticed == 0)
|
|
{
|
|
sendto_realops_snomask(SNO_BOTS, L_NETWIDE,
|
|
"Possible Flooder %s[%s@%s] on %s target: %s",
|
|
source_p->name, source_p->username,
|
|
source_p->orighost,
|
|
source_p->servptr->name, target_p->name);
|
|
target_p->localClient->flood_noticed = 1;
|
|
/* add a bit of penalty */
|
|
target_p->localClient->received_number_of_privmsgs += 2;
|
|
}
|
|
if(MyClient(source_p) && (p_or_n != NOTICE))
|
|
sendto_one(source_p,
|
|
":%s NOTICE %s :*** Message to %s throttled due to flooding",
|
|
me.name, source_p->name, target_p->name);
|
|
return 1;
|
|
}
|
|
else
|
|
target_p->localClient->received_number_of_privmsgs++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* flood_attack_channel
|
|
* inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
|
|
* says NOTICE must not auto reply
|
|
* - pointer to source Client
|
|
* - pointer to target channel
|
|
* output - 1 if target is under flood attack
|
|
* side effects - check for flood attack on target chptr
|
|
*/
|
|
static int
|
|
flood_attack_channel(int p_or_n, struct Client *source_p, struct Channel *chptr, char *chname)
|
|
{
|
|
int delta;
|
|
|
|
if(GlobalSetOptions.floodcount && MyClient(source_p))
|
|
{
|
|
if((chptr->first_received_message_time + 1) < CurrentTime)
|
|
{
|
|
delta = CurrentTime - chptr->first_received_message_time;
|
|
chptr->received_number_of_privmsgs -= delta;
|
|
chptr->first_received_message_time = CurrentTime;
|
|
if(chptr->received_number_of_privmsgs <= 0)
|
|
{
|
|
chptr->received_number_of_privmsgs = 0;
|
|
chptr->flood_noticed = 0;
|
|
}
|
|
}
|
|
|
|
if((chptr->received_number_of_privmsgs >= GlobalSetOptions.floodcount)
|
|
|| chptr->flood_noticed)
|
|
{
|
|
if(chptr->flood_noticed == 0)
|
|
{
|
|
sendto_realops_snomask(SNO_BOTS, *chptr->chname == '&' ? L_ALL : L_NETWIDE,
|
|
"Possible Flooder %s[%s@%s] on %s target: %s",
|
|
source_p->name, source_p->username,
|
|
source_p->orighost,
|
|
source_p->servptr->name, chptr->chname);
|
|
chptr->flood_noticed = 1;
|
|
|
|
/* Add a bit of penalty */
|
|
chptr->received_number_of_privmsgs += 2;
|
|
}
|
|
if(MyClient(source_p) && (p_or_n != NOTICE))
|
|
sendto_one(source_p,
|
|
":%s NOTICE %s :*** Message to %s throttled due to flooding",
|
|
me.name, source_p->name, chptr->chname);
|
|
return 1;
|
|
}
|
|
else
|
|
chptr->received_number_of_privmsgs++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* handle_special
|
|
*
|
|
* inputs - server pointer
|
|
* - client pointer
|
|
* - nick stuff to grok for opers
|
|
* - text to send if grok
|
|
* output - none
|
|
* side effects - all the traditional oper type messages are parsed here.
|
|
* i.e. "/msg #some.host."
|
|
* However, syntax has been changed.
|
|
* previous syntax "/msg #some.host.mask"
|
|
* now becomes "/msg $#some.host.mask"
|
|
* previous syntax of: "/msg $some.server.mask" remains
|
|
* This disambiguates the syntax.
|
|
*/
|
|
static void
|
|
handle_special(int p_or_n, const char *command, struct Client *client_p,
|
|
struct Client *source_p, const char *nick, const char *text)
|
|
{
|
|
struct Client *target_p;
|
|
char *host;
|
|
char *server;
|
|
char *s;
|
|
int count;
|
|
|
|
/* user[%host]@server addressed?
|
|
* NOTE: users can send to user@server, but not user%host@server
|
|
* or opers@server
|
|
*/
|
|
if((server = strchr(nick, '@')) != NULL)
|
|
{
|
|
if((target_p = find_server(source_p, server + 1)) == NULL)
|
|
{
|
|
sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
|
|
form_str(ERR_NOSUCHSERVER), server + 1);
|
|
return;
|
|
}
|
|
|
|
count = 0;
|
|
|
|
if(!IsOper(source_p))
|
|
{
|
|
if(strchr(nick, '%') || (strncmp(nick, "opers", 5) == 0))
|
|
{
|
|
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
|
|
form_str(ERR_NOSUCHNICK), nick);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* somewhere else.. */
|
|
if(!IsMe(target_p))
|
|
{
|
|
sendto_one(target_p, ":%s %s %s :%s",
|
|
get_id(source_p, target_p), command, nick, text);
|
|
return;
|
|
}
|
|
|
|
*server = '\0';
|
|
|
|
if((host = strchr(nick, '%')) != NULL)
|
|
*host++ = '\0';
|
|
|
|
/* Check if someones msg'ing opers@our.server */
|
|
if(strcmp(nick, "opers") == 0)
|
|
{
|
|
sendto_realops_snomask(SNO_GENERAL, L_ALL, "To opers: From: %s: %s",
|
|
source_p->name, text);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Look for users which match the destination host
|
|
* (no host == wildcard) and if one and one only is
|
|
* found connected to me, deliver message!
|
|
*/
|
|
target_p = find_userhost(nick, host, &count);
|
|
|
|
if(target_p != NULL)
|
|
{
|
|
if(server != NULL)
|
|
*server = '@';
|
|
if(host != NULL)
|
|
*--host = '%';
|
|
|
|
if(count == 1)
|
|
sendto_anywhere(target_p, source_p, command, ":%s", text);
|
|
else
|
|
sendto_one(source_p, form_str(ERR_TOOMANYTARGETS),
|
|
get_id(&me, source_p), get_id(source_p, source_p), nick);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* the following two cases allow masks in NOTICEs
|
|
* (for OPERs only)
|
|
*
|
|
* Armin, 8Jun90 (gruner@informatik.tu-muenchen.de)
|
|
*/
|
|
if(IsOper(source_p) && *nick == '$')
|
|
{
|
|
if((*(nick + 1) == '$' || *(nick + 1) == '#'))
|
|
nick++;
|
|
else if(MyOper(source_p))
|
|
{
|
|
sendto_one(source_p,
|
|
":%s NOTICE %s :The command %s %s is no longer supported, please use $%s",
|
|
me.name, source_p->name, command, nick, nick);
|
|
return;
|
|
}
|
|
|
|
if(MyClient(source_p) && !IsOperMassNotice(source_p))
|
|
{
|
|
sendto_one(source_p, form_str(ERR_NOPRIVS),
|
|
me.name, source_p->name, "mass_notice");
|
|
return;
|
|
}
|
|
|
|
if((s = strrchr(nick, '.')) == NULL)
|
|
{
|
|
sendto_one_numeric(source_p, ERR_NOTOPLEVEL,
|
|
form_str(ERR_NOTOPLEVEL), nick);
|
|
return;
|
|
}
|
|
while(*++s)
|
|
if(*s == '.' || *s == '*' || *s == '?')
|
|
break;
|
|
if(*s == '*' || *s == '?')
|
|
{
|
|
sendto_one_numeric(source_p, ERR_WILDTOPLEVEL,
|
|
form_str(ERR_WILDTOPLEVEL), nick);
|
|
return;
|
|
}
|
|
|
|
sendto_match_butone(IsServer(client_p) ? client_p : NULL, source_p,
|
|
nick + 1,
|
|
(*nick == '#') ? MATCH_HOST : MATCH_SERVER,
|
|
"%s $%s :%s", command, nick, text);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* find_userhost - find a user@host (server or user).
|
|
* inputs - user name to look for
|
|
* - host name to look for
|
|
* - pointer to count of number of matches found
|
|
* outputs - pointer to client if found
|
|
* - count is updated
|
|
* side effects - none
|
|
*
|
|
*/
|
|
static struct Client *
|
|
find_userhost(const char *user, const char *host, int *count)
|
|
{
|
|
struct Client *c2ptr;
|
|
struct Client *res = NULL;
|
|
char *u = LOCAL_COPY(user);
|
|
dlink_node *ptr;
|
|
*count = 0;
|
|
if(collapse(u) != NULL)
|
|
{
|
|
DLINK_FOREACH(ptr, global_client_list.head)
|
|
{
|
|
c2ptr = ptr->data;
|
|
if(!MyClient(c2ptr)) /* implies mine and an user */
|
|
continue;
|
|
if((!host || match(host, c2ptr->host)) && irccmp(u, c2ptr->username) == 0)
|
|
{
|
|
(*count)++;
|
|
res = c2ptr;
|
|
}
|
|
}
|
|
}
|
|
return (res);
|
|
}
|