MirrorHub/construct
0
0
Fork 0
mirror of https://github.com/matrix-construct/construct synced 2024-11-30 02:32:43 +01:00
Code Issues Releases Wiki Activity
construct/modules/core/m_message.c

1094 lines
29 KiB
C
Raw Blame History

/*
* 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
*
* $Id: m_message.c 3173 2007-01-31 23:57:18Z jilles $
*/
#include "stdinc.h"
#include "client.h"
#include "ircd.h"
#include "numeric.h"
#include "common.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 "inline/stringops.h"
static int m_message(int, const char *, struct Client *, struct Client *, int, const char **);
static int m_privmsg(struct Client *, struct Client *, int, const char **);
static int m_notice(struct Client *, struct Client *, int, 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, MFLG_SLOW | MFLG_UNREG,
{mg_unreg, {m_privmsg, 0}, {m_privmsg, 0}, mg_ignore, mg_ignore, {m_privmsg, 0}}
};
struct Message notice_msgtab = {
"NOTICE", 0, 0, 0, MFLG_SLOW,
{mg_unreg, {m_notice, 0}, {m_notice, 0}, {m_notice, 0}, mg_ignore, {m_notice, 0}}
};
mapi_clist_av1 message_clist[] = { &privmsg_msgtab, &notice_msgtab, NULL };
DECLARE_MODULE_AV1(message, modinit, moddeinit, message_clist, NULL, NULL, "$Revision: 3173 $");
struct entity
{
void *ptr;
int type;
int flags;
};
static int build_target_list(int p_or_n, const char *command,
struct Client *client_p,
struct Client *source_p, const char *nicks_channels, const char *text);
static struct Channel *find_allowing_channel(struct Client *source_p, struct Client *target_p);
static int flood_attack_client(int p_or_n, struct Client *source_p, struct Client *target_p);
static int flood_attack_channel(int p_or_n, struct Client *source_p,
struct Channel *chptr, char *chname);
#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 int duplicate_ptr(void *);
static void msg_channel(int p_or_n, const char *command,
struct Client *client_p,
struct Client *source_p, struct Channel *chptr, const char *text);
static void msg_channel_opmod(int p_or_n, const char *command,
struct Client *client_p,
struct Client *source_p, struct Channel *chptr,
const char *text);
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);
static void msg_client(int p_or_n, const char *command,
struct Client *source_p, struct Client *target_p, const char *text);
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);
/*
** 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
**
*/
#define PRIVMSG 0
#define NOTICE 1
static int
m_privmsg(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
return m_message(PRIVMSG, "PRIVMSG", client_p, source_p, parc, parv);
}
static int
m_notice(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
return m_message(NOTICE, "NOTICE", client_p, source_p, parc, parv);
}
/*
* inputs - flag privmsg or notice
* - pointer to command "PRIVMSG" or "NOTICE"
* - pointer to client_p
* - pointer to source_p
* - pointer to channel
*/
static int
m_message(int p_or_n,
const char *command,
struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
int i;
if(parc < 2 || EmptyString(parv[1]))
{
if(p_or_n != NOTICE)
sendto_one(source_p, form_str(ERR_NORECIPIENT), me.name,
source_p->name, command);
return 0;
}
if(parc < 3 || EmptyString(parv[2]))
{
if(p_or_n != NOTICE)
sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name);
return 0;
}
/* 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(p_or_n, command, client_p, source_p, parv[1], parv[2]) < 0)
{
return 0;
}
for(i = 0; i < ntargets; i++)
{
switch (targets[i].type)
{
case ENTITY_CHANNEL:
msg_channel(p_or_n, command, client_p, source_p,
(struct Channel *) targets[i].ptr, parv[2]);
break;
case ENTITY_CHANNEL_OPMOD:
msg_channel_opmod(p_or_n, command, client_p, source_p,
(struct Channel *) targets[i].ptr, parv[2]);
break;
case ENTITY_CHANOPS_ON_CHANNEL:
msg_channel_flags(p_or_n, command, client_p, source_p,
(struct Channel *) targets[i].ptr,
targets[i].flags, parv[2]);
break;
case ENTITY_CLIENT:
msg_client(p_or_n, command, source_p,
(struct Client *) targets[i].ptr, parv[2]);
break;
}
}
return 0;
}
/*
* 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(int p_or_n, const char *command, 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(p_or_n != 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, command);
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);
return (-1);
}
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(p_or_n != NOTICE)
{
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
}
continue;
}
if(strchr(nick, '@') || (IsOper(source_p) && (*nick == '$')))
{
handle_special(p_or_n, command, client_p, source_p, nick, text);
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(p_or_n != NOTICE)
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
continue;
}
/* no matching anything found - error if not NOTICE */
if(p_or_n != 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 - YES if duplicate pointer in table, NO if not.
* note, this does the canonize using pointers
* side effects - NONE
*/
static int
duplicate_ptr(void *ptr)
{
int i;
for(i = 0; i < ntargets; i++)
if(targets[i].ptr == ptr)
return YES;
return NO;
}
/*
* msg_channel
*
* inputs - flag privmsg or notice
* - pointer to command "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(int p_or_n, const char *command,
struct Client *client_p, struct Client *source_p, struct Channel *chptr,
const char *text)
{
int result;
char text2[BUFSIZE];
if(MyClient(source_p))
{
/* idle time shouldnt be reset by notices --fl */
if(p_or_n != NOTICE)
source_p->localClient->last = rb_current_time();
}
if(chptr->mode.mode & MODE_NOCOLOR)
{
rb_strlcpy(text2, text, BUFSIZE);
strip_colour(text2);
text = text2;
if (EmptyString(text))
{
/* could be empty after colour stripping and
* that would cause problems later */
if(p_or_n != 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 ||
!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname))
{
sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr,
"%s %s :%s", command, chptr->chname, text);
}
}
else if(chptr->mode.mode & MODE_OPMODERATE &&
(!(chptr->mode.mode & MODE_NOPRIVMSGS) ||
IsMember(source_p, chptr)))
{
if(!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname))
{
sendto_channel_opmod(client_p, source_p, chptr,
command, text);
}
}
else
{
if(p_or_n != NOTICE)
sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN,
form_str(ERR_CANNOTSENDTOCHAN), chptr->chname);
}
}
/*
* msg_channel_opmod
*
* inputs - flag privmsg or notice
* - pointer to command "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(int p_or_n, const char *command,
struct Client *client_p, struct Client *source_p,
struct Channel *chptr, const char *text)
{
char text2[BUFSIZE];
if(chptr->mode.mode & MODE_NOCOLOR)
{
rb_strlcpy(text2, text, BUFSIZE);
strip_colour(text2);
text = text2;
if (EmptyString(text))
{
/* could be empty after colour stripping and
* that would cause problems later */
if(p_or_n != 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(p_or_n, source_p, chptr, chptr->chname))
{
sendto_channel_opmod(client_p, source_p, chptr,
command, text);
}
}
else
{
if(p_or_n != 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 command, "PRIVMSG" or "NOTICE"
* - 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(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 = rb_current_time();
}
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;
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 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 > rb_current_time() && 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 = rb_current_time();
}
/* clear as many targets as we can */
else if((i = (rb_current_time() - 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 = rb_current_time();
}
/* 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 = rb_current_time();
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)
{
int do_floodcount = 0;
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 = rb_current_time();
/* auto cprivmsg/cnotice */
do_floodcount = !IsOper(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((p_or_n != 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 &&
flood_attack_client(p_or_n, 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) && (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);
}
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) < rb_current_time())
{
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 = rb_current_time();
}
}
}
else
sendto_anywhere(target_p, source_p, command, ":%s", text);
}
else
sendto_anywhere(target_p, source_p, command, ":%s", text);
return;
}
static struct Channel *
find_allowing_channel(struct Client *source_p, struct Client *target_p)
{
rb_dlink_node *ptr;
struct membership *msptr;
RB_DLINK_FOREACH(ptr, source_p->user->channel.head)
{
msptr = ptr->data;
if (is_chanop_voiced(msptr) && IsMember(target_p, msptr->chptr))
return msptr->chptr;
}
return NULL;
}
/*
* 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;
/* 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) && (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->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) < rb_current_time())
{
delta = rb_current_time() - chptr->first_received_message_time;
chptr->received_number_of_privmsgs -= delta;
chptr->first_received_message_time = rb_current_time();
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 $some.server.mask" remains
* This disambiguates the syntax.
*/
static void
handle_special(int p_or_n, const char *command, struct Client *client_p,
struct Client *source_p, const char *nick, const char *text)
{
struct Client *target_p;
char *server;
char *s;
/* user[%host]@server addressed?
* NOTE: users can send to user@server, but not user%host@server
* or opers@server
*/
if((server = strchr(nick, '@')) != NULL)
{
if((target_p = find_server(source_p, server + 1)) == NULL)
{
sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
form_str(ERR_NOSUCHSERVER), server + 1);
return;
}
if(!IsOper(source_p))
{
if(strchr(nick, '%') || (strncmp(nick, "opers", 5) == 0))
{
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
return;
}
}
/* somewhere else.. */
if(!IsMe(target_p))
{
sendto_one(target_p, ":%s %s %s :%s",
get_id(source_p, target_p), command, nick, text);
return;
}
/* Check if someones msg'ing opers@our.server */
if(strncmp(nick, "opers@", 6) == 0)
{
sendto_realops_snomask(SNO_GENERAL, L_ALL, "To opers: From: %s: %s",
source_p->name, text);
return;
}
/* This was not very useful except for bypassing certain
* restrictions. Note that we still allow sending to
* remote servers this way, for messaging pseudoservers
* securely whether they have a service{} block or not.
* -- jilles
*/
sendto_one_numeric(source_p, ERR_NOSUCHNICK,
form_str(ERR_NOSUCHNICK), nick);
return;
}
/*
* the following two cases allow masks in NOTICEs
* (for OPERs only)
*
* Armin, 8Jun90 (gruner@informatik.tu-muenchen.de)
*/
if(IsOper(source_p) && *nick == '$')
{
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, 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;
}
}
Reference in a new issue View git blame Copy permalink