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solanum-vs-hackint-and-char.../modules/core/m_message.c

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/*
* ircd-ratbox: A slightly useful ircd.
* m_message.c: Sends a (PRIVMSG|NOTICE) message to a user or channel.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* 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
*/
#include "stdinc.h"
#include "client.h"
#include "ircd.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_serv.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "channel.h"
#include "match.h"
#include "hash.h"
#include "class.h"
#include "msg.h"
#include "packet.h"
#include "send.h"
#include "s_newconf.h"
#include "s_stats.h"
#include "tgchange.h"
#include "inline/stringops.h"
static const char message_desc[] =
"Provides the PRIVMSG and NOTICE commands to send messages to users and channels";
static void m_message(enum message_type, struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void m_privmsg(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void m_notice(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void m_echo(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void echo_msg(struct Client *, struct Client *, enum message_type, const char *);
static void expire_tgchange(void *unused);
static struct ev_entry *expire_tgchange_event;
static int
modinit(void)
{
expire_tgchange_event = rb_event_addish("expire_tgchange", expire_tgchange, NULL, 300);
expire_tgchange(NULL);
return 0;
}
static void
moddeinit(void)
{
rb_event_delete(expire_tgchange_event);
}
struct Message privmsg_msgtab = {
"PRIVMSG", 0, 0, 0, 0,
{mg_unreg, {m_privmsg, 0}, {m_privmsg, 0}, mg_ignore, mg_ignore, {m_privmsg, 0}}
};
struct Message notice_msgtab = {
"NOTICE", 0, 0, 0, 0,
{mg_unreg, {m_notice, 0}, {m_notice, 0}, {m_notice, 0}, mg_ignore, {m_notice, 0}}
};
struct Message echo_msgtab = {
"ECHO", 0, 0, 0, 0,
{mg_unreg, mg_ignore, {m_echo, 3}, mg_ignore, mg_ignore, mg_ignore}
};
mapi_clist_av1 message_clist[] = { &privmsg_msgtab, &notice_msgtab, &echo_msgtab, NULL };
DECLARE_MODULE_AV2(message, modinit, moddeinit, message_clist, NULL, NULL, NULL, NULL, message_desc);
struct entity
{
void *ptr;
int type;
int flags;
};
static int build_target_list(enum message_type msgtype,
struct Client *client_p,
struct Client *source_p, const char *nicks_channels, const char *text);
static bool flood_attack_client(enum message_type msgtype, struct Client *source_p, struct Client *target_p);
/* Fifteen seconds should be plenty for a client to reply a ctcp */
#define LARGE_CTCP_TIME 15
#define ENTITY_NONE 0
#define ENTITY_CHANNEL 1
#define ENTITY_CHANNEL_OPMOD 2
#define ENTITY_CHANOPS_ON_CHANNEL 3
#define ENTITY_CLIENT 4
static struct entity targets[512];
static int ntargets = 0;
static bool duplicate_ptr(void *);
static void msg_channel(enum message_type msgtype,
struct Client *client_p,
struct Client *source_p, struct Channel *chptr, const char *text);
static void msg_channel_opmod(enum message_type msgtype,
struct Client *client_p,
struct Client *source_p, struct Channel *chptr,
const char *text);
static void msg_channel_flags(enum message_type msgtype,
struct Client *client_p,
struct Client *source_p,
struct Channel *chptr, int flags, const char *text);
static void msg_client(enum message_type msgtype,
struct Client *source_p, struct Client *target_p, const char *text);
static void handle_special(enum message_type msgtype,
struct Client *client_p, struct Client *source_p, const char *nick,
const char *text);
/*
** m_privmsg
**
** massive cleanup
** rev argv 6/91
**
** Another massive cleanup Nov, 2000
** (I don't think there is a single line left from 6/91. Maybe.)
** m_privmsg and m_notice do basically the same thing.
** in the original 2.8.2 code base, they were the same function
** "m_message.c." When we did the great cleanup in conjuncton with bleep
** of ircu fame, we split m_privmsg.c and m_notice.c.
** I don't see the point of that now. Its harder to maintain, its
** easier to introduce bugs into one version and not the other etc.
** Really, the penalty of an extra function call isn't that big a deal folks.
** -db Nov 13, 2000
**
*/
const char *cmdname[MESSAGE_TYPE_COUNT] = {
[MESSAGE_TYPE_PRIVMSG] = "PRIVMSG",
[MESSAGE_TYPE_NOTICE] = "NOTICE",
};
static void
m_privmsg(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
m_message(MESSAGE_TYPE_PRIVMSG, msgbuf_p, client_p, source_p, parc, parv);
}
static void
m_notice(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
m_message(MESSAGE_TYPE_NOTICE, msgbuf_p, client_p, source_p, parc, parv);
}
/*
* inputs - flag privmsg or notice
* - pointer to client_p
* - pointer to source_p
* - pointer to channel
*/
static void
m_message(enum message_type msgtype, struct MsgBuf *msgbuf_p,
struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
int i;
if(parc < 2 || EmptyString(parv[1]))
{
if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one(source_p, form_str(ERR_NORECIPIENT), me.name,
source_p->name, cmdname[msgtype]);
return;
}
if(parc < 3 || EmptyString(parv[2]))
{
if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name);
return;
}
/* Finish the flood grace period if theyre not messaging themselves
* as some clients (ircN) do this as a "lag check"
*/
if(MyClient(source_p) && !IsFloodDone(source_p) && irccmp(source_p->name, parv[1]))
flood_endgrace(source_p);
if(build_target_list(msgtype, client_p, source_p, parv[1], parv[2]) < 0)
{
return;
}
for(i = 0; i < ntargets; i++)
{
switch (targets[i].type)
{
case ENTITY_CHANNEL:
msg_channel(msgtype, client_p, source_p,
(struct Channel *) targets[i].ptr, parv[2]);
break;
case ENTITY_CHANNEL_OPMOD:
msg_channel_opmod(msgtype, client_p, source_p,
(struct Channel *) targets[i].ptr, parv[2]);
break;
case ENTITY_CHANOPS_ON_CHANNEL:
msg_channel_flags(msgtype, client_p, source_p,
(struct Channel *) targets[i].ptr,
targets[i].flags, parv[2]);
break;
case ENTITY_CLIENT:
msg_client(msgtype, source_p,
(struct Client *) targets[i].ptr, parv[2]);
break;
}
}
}
static void
m_echo(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p,
int parc, const char *parv[])
{
struct Client *target_p = find_person(parv[2]);
enum message_type msgtype;
if (target_p == NULL)
return;
switch (parv[1][0])
{
case 'P': msgtype = MESSAGE_TYPE_PRIVMSG; break;
case 'N': msgtype = MESSAGE_TYPE_NOTICE; break;
default: return;
}
echo_msg(source_p, target_p, msgtype, parv[3]);
}
/*
* build_target_list
*
* inputs - pointer to given client_p (server)
* - pointer to given source (oper/client etc.)
* - pointer to list of nicks/channels
* - pointer to table to place results
* - pointer to text (only used if source_p is an oper)
* output - number of valid entities
* side effects - target_table is modified to contain a list of
* pointers to channels or clients
* if source client is an oper
* all the classic old bizzare oper privmsg tricks
* are parsed and sent as is, if prefixed with $
* to disambiguate.
*/
static int
build_target_list(enum message_type msgtype, struct Client *client_p,
struct Client *source_p, const char *nicks_channels, const char *text)
{
int type;
char *p, *nick, *target_list;
struct Channel *chptr = NULL;
struct Client *target_p;
target_list = LOCAL_COPY(nicks_channels); /* skip strcpy for non-lazyleafs */
ntargets = 0;
for(nick = rb_strtok_r(target_list, ",", &p); nick; nick = rb_strtok_r(NULL, ",", &p))
{
char *with_prefix;
/*
* channels are privmsg'd a lot more than other clients, moved up
* here plain old channel msg?
*/
if(IsChanPrefix(*nick))
{
/* ignore send of local channel to a server (should not happen) */
if(IsServer(client_p) && *nick == '&')
continue;
if((chptr = find_channel(nick)) != NULL)
{
if(!duplicate_ptr(chptr))
{
if(ntargets >= ConfigFileEntry.max_targets)
{
sendto_one(source_p, form_str(ERR_TOOMANYTARGETS),
me.name, source_p->name, nick);
return (1);
}
targets[ntargets].ptr = (void *) chptr;
targets[ntargets++].type = ENTITY_CHANNEL;
}
}
/* non existant channel */
else if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
continue;
}
if(MyClient(source_p))
target_p = find_named_person(nick);
else
target_p = find_person(nick);
/* look for a privmsg to another client */
if(target_p)
{
if(!duplicate_ptr(target_p))
{
if(ntargets >= ConfigFileEntry.max_targets)
{
sendto_one(source_p, form_str(ERR_TOOMANYTARGETS),
me.name, source_p->name, nick);
return (1);
}
targets[ntargets].ptr = (void *) target_p;
targets[ntargets].type = ENTITY_CLIENT;
targets[ntargets++].flags = 0;
}
continue;
}
/* @#channel or +#channel message ? */
type = 0;
with_prefix = nick;
/* allow %+@ if someone wants to do that */
for(;;)
{
if(*nick == '@')
type |= CHFL_CHANOP;
else if(*nick == '+')
type |= CHFL_CHANOP | CHFL_VOICE;
else
break;
nick++;
}
if(type != 0)
{
/* no recipient.. */
if(EmptyString(nick))
{
sendto_one(source_p, form_str(ERR_NORECIPIENT),
me.name, source_p->name, cmdname[msgtype]);
continue;
}
/* At this point, nick+1 should be a channel name i.e. #foo or &foo
* if the channel is found, fine, if not report an error
*/
if((chptr = find_channel(nick)) != NULL)
{
struct membership *msptr;
msptr = find_channel_membership(chptr, source_p);
if(!IsServer(source_p) && !IsService(source_p) && !is_chanop_voiced(msptr))
{
sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
get_id(&me, source_p),
get_id(source_p, source_p),
with_prefix);
continue;
}
if(!duplicate_ptr(chptr))
{
if(ntargets >= ConfigFileEntry.max_targets)
{
sendto_one(source_p, form_str(ERR_TOOMANYTARGETS),
me.name, source_p->name, nick);
return (1);
}
targets[ntargets].ptr = (void *) chptr;
targets[ntargets].type = ENTITY_CHANOPS_ON_CHANNEL;
targets[ntargets++].flags = type;
}
}
else if(msgtype != MESSAGE_TYPE_NOTICE)
{
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
}
continue;
}
if(IsServer(client_p) && *nick == '=' && nick[1] == '#')
{
nick++;
if((chptr = find_channel(nick)) != NULL)
{
if(!duplicate_ptr(chptr))
{
if(ntargets >= ConfigFileEntry.max_targets)
{
sendto_one(source_p, form_str(ERR_TOOMANYTARGETS),
me.name, source_p->name, nick);
return (1);
}
targets[ntargets].ptr = (void *) chptr;
targets[ntargets++].type = ENTITY_CHANNEL_OPMOD;
}
}
/* non existant channel */
else if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
continue;
}
if(strchr(nick, '@') || (IsOper(source_p) && (*nick == '$')))
{
handle_special(msgtype, client_p, source_p, nick, text);
continue;
}
/* no matching anything found - error if not NOTICE */
if(msgtype != MESSAGE_TYPE_NOTICE)
{
/* dont give this numeric when source is local,
* because its misleading --anfl
*/
if(!MyClient(source_p) && IsDigit(*nick))
sendto_one(source_p, ":%s %d %s * :Target left IRC. "
"Failed to deliver: [%.20s]",
get_id(&me, source_p), ERR_NOSUCHNICK,
get_id(source_p, source_p), text);
else
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
}
}
return (1);
}
/*
* duplicate_ptr
*
* inputs - pointer to check
* - pointer to table of entities
* - number of valid entities so far
* output - true if duplicate pointer in table, false if not.
* note, this does the canonize using pointers
* side effects - NONE
*/
static bool
duplicate_ptr(void *ptr)
{
int i;
for(i = 0; i < ntargets; i++)
if(targets[i].ptr == ptr)
return true;
return false;
}
/*
* msg_channel
*
* inputs - flag privmsg or notice
* - pointer to client_p
* - pointer to source_p
* - pointer to channel
* output - NONE
* side effects - message given channel
*
* XXX - We need to rework this a bit, it's a tad ugly. --nenolod
*/
static void
msg_channel(enum message_type msgtype,
struct Client *client_p, struct Client *source_p, struct Channel *chptr,
const char *text)
{
int result;
hook_data_privmsg_channel hdata;
if(MyClient(source_p))
{
/* idle time shouldnt be reset by notices --fl */
if(msgtype != MESSAGE_TYPE_NOTICE)
source_p->localClient->last = rb_current_time();
}
hdata.msgtype = msgtype;
hdata.source_p = source_p;
hdata.chptr = chptr;
hdata.text = text;
hdata.approved = 0;
call_hook(h_privmsg_channel, &hdata);
/* memory buffer address may have changed, update pointer */
text = hdata.text;
if (hdata.approved != 0)
return;
/* hook may have reduced the string to nothing. */
if (EmptyString(text))
{
/* could be empty after colour stripping and
* that would cause problems later */
if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name);
return;
}
/* chanops and voiced can flood their own channel with impunity */
if((result = can_send(chptr, source_p, NULL)))
{
if(result != CAN_SEND_OPV && MyClient(source_p) &&
!IsOperGeneral(source_p) &&
!add_channel_target(source_p, chptr))
{
sendto_one(source_p, form_str(ERR_TARGCHANGE),
me.name, source_p->name, chptr->chname);
return;
}
if(result == CAN_SEND_OPV ||
!flood_attack_channel(msgtype, source_p, chptr, chptr->chname))
{
sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr,
"%s %s :%s", cmdname[msgtype], chptr->chname, text);
}
}
else if(chptr->mode.mode & MODE_OPMODERATE &&
(!(chptr->mode.mode & MODE_NOPRIVMSGS) ||
IsMember(source_p, chptr)))
{
if(MyClient(source_p) && !IsOperGeneral(source_p) &&
!add_channel_target(source_p, chptr))
{
sendto_one(source_p, form_str(ERR_TARGCHANGE),
me.name, source_p->name, chptr->chname);
return;
}
if(!flood_attack_channel(msgtype, source_p, chptr, chptr->chname))
{
sendto_channel_opmod(client_p, source_p, chptr,
cmdname[msgtype], text);
}
}
else
{
if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN,
form_str(ERR_CANNOTSENDTOCHAN), chptr->chname);
}
}
/*
* msg_channel_opmod
*
* inputs - flag privmsg or notice
* - pointer to client_p
* - pointer to source_p
* - pointer to channel
* output - NONE
* side effects - message given channel ops
*
* XXX - We need to rework this a bit, it's a tad ugly. --nenolod
*/
static void
msg_channel_opmod(enum message_type msgtype,
struct Client *client_p, struct Client *source_p,
struct Channel *chptr, const char *text)
{
hook_data_privmsg_channel hdata;
hdata.msgtype = msgtype;
hdata.source_p = source_p;
hdata.chptr = chptr;
hdata.text = text;
hdata.approved = 0;
call_hook(h_privmsg_channel, &hdata);
/* memory buffer address may have changed, update pointer */
text = hdata.text;
if (hdata.approved != 0)
return;
/* hook may have reduced the string to nothing. */
if (EmptyString(text))
{
/* could be empty after colour stripping and
* that would cause problems later */
if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name);
return;
}
if(chptr->mode.mode & MODE_OPMODERATE &&
(!(chptr->mode.mode & MODE_NOPRIVMSGS) ||
IsMember(source_p, chptr)))
{
if(!flood_attack_channel(msgtype, source_p, chptr, chptr->chname))
{
sendto_channel_opmod(client_p, source_p, chptr,
cmdname[msgtype], text);
}
}
else
{
if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN,
form_str(ERR_CANNOTSENDTOCHAN), chptr->chname);
}
}
/*
* msg_channel_flags
*
* inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
* say NOTICE must not auto reply
* - pointer to client_p
* - pointer to source_p
* - pointer to channel
* - flags
* - pointer to text to send
* output - NONE
* side effects - message given channel either chanop or voice
*/
static void
msg_channel_flags(enum message_type msgtype, struct Client *client_p,
struct Client *source_p, struct Channel *chptr, int flags, const char *text)
{
int type;
char c;
hook_data_privmsg_channel hdata;
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(msgtype != MESSAGE_TYPE_NOTICE)
source_p->localClient->last = rb_current_time();
}
hdata.msgtype = msgtype;
hdata.source_p = source_p;
hdata.chptr = chptr;
hdata.text = text;
hdata.approved = 0;
call_hook(h_privmsg_channel, &hdata);
/* memory buffer address may have changed, update pointer */
text = hdata.text;
if (hdata.approved != 0)
return;
if (EmptyString(text))
{
/* could be empty after colour stripping and
* that would cause problems later */
if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name);
return;
}
sendto_channel_flags(client_p, type, source_p, chptr, "%s %c%s :%s",
cmdname[msgtype], c, chptr->chname, text);
}
static void
expire_tgchange(void *unused)
{
tgchange *target;
rb_dlink_node *ptr, *next_ptr;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, tgchange_list.head)
{
target = ptr->data;
if(target->expiry < rb_current_time())
{
rb_dlinkDelete(ptr, &tgchange_list);
rb_patricia_remove(tgchange_tree, target->pnode);
rb_free(target->ip);
rb_free(target);
}
}
}
static void
echo_msg(struct Client *source_p, struct Client *target_p,
enum message_type msgtype, const char *text)
{
if (MyClient(target_p))
{
if (!IsCapable(target_p, CLICAP_ECHO_MESSAGE))
return;
sendto_one(target_p, ":%s!%s@%s %s %s :%s",
target_p->name, target_p->username, target_p->host,
cmdname[msgtype],
source_p->name,
text);
return;
}
sendto_one(target_p, ":%s ECHO %c %s :%s",
use_id(source_p),
msgtype == MESSAGE_TYPE_PRIVMSG ? 'P' : 'N',
use_id(target_p),
text);
}
/*
* msg_client
*
* inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
* say NOTICE must not auto reply
* - 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(enum message_type msgtype,
struct Client *source_p, struct Client *target_p, const char *text)
{
int do_floodcount = 0;
hook_data_privmsg_user hdata;
if(MyClient(source_p))
{
/* reset idle time for message only if its not to self
* and its not a notice */
if(msgtype != MESSAGE_TYPE_NOTICE)
source_p->localClient->last = rb_current_time();
/* auto cprivmsg/cnotice */
do_floodcount = !IsOperGeneral(source_p) &&
!find_allowing_channel(source_p, target_p);
/* target change stuff, dont limit ctcp replies as that
* would allow people to start filling up random users
* targets just by ctcping them
*/
if((msgtype != MESSAGE_TYPE_NOTICE || *text != '\001') &&
ConfigFileEntry.target_change && do_floodcount)
{
if(!add_target(source_p, target_p))
{
sendto_one(source_p, form_str(ERR_TARGCHANGE),
me.name, source_p->name, target_p->name);
return;
}
}
if (do_floodcount && msgtype == MESSAGE_TYPE_NOTICE && *text == '\001' &&
target_p->large_ctcp_sent + LARGE_CTCP_TIME >= rb_current_time())
do_floodcount = 0;
if (do_floodcount &&
flood_attack_client(msgtype, source_p, target_p))
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) && (msgtype != MESSAGE_TYPE_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);
hdata.msgtype = msgtype;
hdata.source_p = source_p;
hdata.target_p = target_p;
hdata.text = text;
hdata.approved = 0;
call_hook(h_privmsg_user, &hdata);
/* buffer location may have changed. */
text = hdata.text;
if (hdata.approved != 0)
return;
if(MyClient(target_p))
{
if (EmptyString(text))
{
/* could be empty after colour stripping and
* that would cause problems later */
if(msgtype != MESSAGE_TYPE_NOTICE)
sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name);
return;
}
add_reply_target(target_p, source_p);
sendto_anywhere(target_p, source_p, cmdname[msgtype], ":%s", text);
echo_msg(target_p, source_p, msgtype, text);
}
else
sendto_anywhere(target_p, source_p, cmdname[msgtype], ":%s", text);
return;
}
/*
* flood_attack_client
* inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
* says NOTICE must not auto reply
* - pointer to source Client
* - pointer to target Client
* output - true if target is under flood attack
* side effects - check for flood attack on target target_p
*/
static bool
flood_attack_client(enum message_type msgtype, struct Client *source_p, struct Client *target_p)
{
int delta;
/* Services could get many messages legitimately and
* can be messaged without rate limiting via aliases
* and msg user@server.
* -- jilles
*/
if(GlobalSetOptions.floodcount && IsClient(source_p) && source_p != target_p && !IsService(target_p))
{
if((target_p->first_received_message_time + 1) < rb_current_time())
{
delta = rb_current_time() - target_p->first_received_message_time;
target_p->received_number_of_privmsgs -= delta;
target_p->first_received_message_time = rb_current_time();
if(target_p->received_number_of_privmsgs <= 0)
{
target_p->received_number_of_privmsgs = 0;
target_p->flood_noticed = 0;
}
}
if((target_p->received_number_of_privmsgs >=
GlobalSetOptions.floodcount) || target_p->flood_noticed)
{
if(target_p->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->flood_noticed = 1;
/* add a bit of penalty */
target_p->received_number_of_privmsgs += 2;
}
if(MyClient(source_p) && (msgtype != MESSAGE_TYPE_NOTICE))
sendto_one(source_p,
":%s NOTICE %s :*** Message to %s throttled due to flooding",
me.name, source_p->name, target_p->name);
return true;
}
else
target_p->received_number_of_privmsgs++;
}
return false;
}
/*
* 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 $some.server.mask" remains
* This disambiguates the syntax.
*/
static void
handle_special(enum message_type msgtype, struct Client *client_p,
struct Client *source_p, const char *nick, const char *text)
{
struct Client *target_p;
char *server;
/* user[%host]@server addressed?
* NOTE: users can send to user@server, but not user%host@server
* or opers@server
*/
if((server = strchr(nick, '@')) != NULL)
{
if((target_p = find_server(source_p, server + 1)) == NULL)
{
sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
form_str(ERR_NOSUCHSERVER), server + 1);
return;
}
if(!IsOper(source_p))
{
if(strchr(nick, '%') || (strncmp(nick, "opers", 5) == 0))
{
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
return;
}
}
/* somewhere else.. */
if(!IsMe(target_p))
{
sendto_one(target_p, ":%s %s %s :%s",
get_id(source_p, target_p), cmdname[msgtype], nick, text);
return;
}
/* Check if someones msg'ing opers@our.server */
if(strncmp(nick, "opers@", 6) == 0)
{
sendto_realops_snomask(SNO_GENERAL, L_ALL, "To opers: From: %s: %s",
source_p->name, text);
return;
}
/* This was not very useful except for bypassing certain
* restrictions. Note that we still allow sending to
* remote servers this way, for messaging pseudoservers
* securely whether they have a service{} block or not.
* -- jilles
*/
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
return;
}
/*
* the following two cases allow masks in NOTICEs
* (for OPERs only)
*
* Armin, 8Jun90 (gruner@informatik.tu-muenchen.de)
*/
if(IsOper(source_p) && *nick == '$')
{
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, cmdname[msgtype], 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(MyClient(source_p))
{
sendto_realops_snomask(SNO_GENERAL, L_ALL | L_NETWIDE, "%s sent mass-%s to %s: %s",
get_oper_name(source_p),
msgtype == MESSAGE_TYPE_PRIVMSG ? "privmsg" : "notice",
nick, text);
}
sendto_match_butone(IsServer(client_p) ? client_p : NULL, source_p,
nick + 1,
(*nick == '#') ? MATCH_HOST : MATCH_SERVER,
"%s $%s :%s", cmdname[msgtype], nick, text);
if (msgtype != MESSAGE_TYPE_NOTICE && *text == '\001')
source_p->large_ctcp_sent = rb_current_time();
return;
}
}
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