390 lines
10 KiB
C
390 lines
10 KiB
C
/*
|
|
* charybdis: An advanced ircd.
|
|
* m_list_safelist.c: Version of /list that uses the safelist code.
|
|
*
|
|
* Copyright (c) 2006 William Pitcock <nenolod@nenolod.net>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#include "stdinc.h"
|
|
#include "channel.h"
|
|
#include "client.h"
|
|
#include "hash.h"
|
|
#include "match.h"
|
|
#include "ircd.h"
|
|
#include "numeric.h"
|
|
#include "s_conf.h"
|
|
#include "s_serv.h"
|
|
#include "send.h"
|
|
#include "msg.h"
|
|
#include "parse.h"
|
|
#include "modules.h"
|
|
|
|
static rb_dlink_list safelisting_clients = { NULL, NULL, 0 };
|
|
|
|
static int _modinit(void);
|
|
static void _moddeinit(void);
|
|
|
|
static int m_list(struct Client *, struct Client *, int, const char **);
|
|
static int mo_list(struct Client *, struct Client *, int, const char **);
|
|
|
|
static void safelist_check_cliexit(hook_data_client_exit * hdata);
|
|
static void safelist_client_instantiate(struct Client *, struct ListClient *);
|
|
static void safelist_client_release(struct Client *);
|
|
static void safelist_one_channel(struct Client *source_p, struct Channel *chptr);
|
|
static void safelist_iterate_client(struct Client *source_p);
|
|
static void safelist_iterate_clients(void *unused);
|
|
static void safelist_channel_named(struct Client *source_p, const char *name);
|
|
|
|
struct Message list_msgtab = {
|
|
"LIST", 0, 0, 0, MFLG_SLOW,
|
|
{mg_unreg, {m_list, 0}, mg_ignore, mg_ignore, mg_ignore, {mo_list, 0}}
|
|
};
|
|
|
|
mapi_clist_av1 list_clist[] = { &list_msgtab, NULL };
|
|
|
|
mapi_hfn_list_av1 list_hfnlist[] = {
|
|
{"client_exit", (hookfn) safelist_check_cliexit},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
DECLARE_MODULE_AV1(list, _modinit, _moddeinit, list_clist, NULL, list_hfnlist, "$Revision: 3372 $");
|
|
|
|
static struct ev_entry *iterate_clients_ev = NULL;
|
|
|
|
static int _modinit(void)
|
|
{
|
|
iterate_clients_ev = rb_event_add("safelist_iterate_clients", safelist_iterate_clients, NULL, 3);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void _moddeinit(void)
|
|
{
|
|
rb_event_delete(iterate_clients_ev);
|
|
}
|
|
|
|
static void safelist_check_cliexit(hook_data_client_exit * hdata)
|
|
{
|
|
/* Cancel the safelist request if we are disconnecting
|
|
* from the server. That way it doesn't core. :P --nenolod
|
|
*/
|
|
if (MyClient(hdata->target) && hdata->target->localClient->safelist_data != NULL)
|
|
{
|
|
safelist_client_release(hdata->target);
|
|
}
|
|
}
|
|
|
|
/* m_list()
|
|
* parv[1] = channel
|
|
*
|
|
* XXX - With SAFELIST, do we really need to continue pacing?
|
|
* In theory, the server cannot be lagged by this. --nenolod
|
|
*/
|
|
static int m_list(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
|
|
{
|
|
static time_t last_used = 0L;
|
|
|
|
if (source_p->localClient->safelist_data != NULL)
|
|
{
|
|
sendto_one_notice(source_p, ":/LIST aborted");
|
|
sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
|
|
safelist_client_release(source_p);
|
|
return 0;
|
|
}
|
|
|
|
if (parc < 2 || !IsChannelName(parv[1]))
|
|
{
|
|
/* pace this due to the sheer traffic involved */
|
|
if (((last_used + ConfigFileEntry.pace_wait) > rb_current_time()))
|
|
{
|
|
sendto_one(source_p, form_str(RPL_LOAD2HI), me.name, source_p->name, "LIST");
|
|
sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
|
|
return 0;
|
|
}
|
|
else
|
|
last_used = rb_current_time();
|
|
}
|
|
|
|
return mo_list(client_p, source_p, parc, parv);
|
|
}
|
|
|
|
/* mo_list()
|
|
* parv[1] = channel
|
|
*/
|
|
static int mo_list(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
|
|
{
|
|
struct ListClient params;
|
|
char *p, *args;
|
|
int i;
|
|
|
|
if (source_p->localClient->safelist_data != NULL)
|
|
{
|
|
sendto_one_notice(source_p, ":/LIST aborted");
|
|
sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
|
|
safelist_client_release(source_p);
|
|
return 0;
|
|
}
|
|
|
|
/* XXX rather arbitrary -- jilles */
|
|
params.users_min = 3;
|
|
params.users_max = INT_MAX;
|
|
|
|
if (parc > 1 && parv[1] != NULL && !IsChannelName(parv[1]))
|
|
{
|
|
args = LOCAL_COPY(parv[1]);
|
|
/* Make any specification cancel out defaults */
|
|
if (*args == '<')
|
|
params.users_min = 0;
|
|
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
if ((p = strchr(args, ',')) != NULL)
|
|
*p++ = '\0';
|
|
|
|
if (*args == '<')
|
|
{
|
|
args++;
|
|
if (IsDigit(*args))
|
|
{
|
|
params.users_max = atoi(args);
|
|
if (params.users_max == 0)
|
|
params.users_max = INT_MAX;
|
|
else
|
|
params.users_max--;
|
|
}
|
|
else
|
|
params.users_max = INT_MAX;
|
|
}
|
|
else if (*args == '>')
|
|
{
|
|
args++;
|
|
if (IsDigit(*args))
|
|
params.users_min = atoi(args) + 1;
|
|
else
|
|
params.users_min = 0;
|
|
}
|
|
|
|
if (EmptyString(p))
|
|
break;
|
|
else
|
|
args = p;
|
|
}
|
|
}
|
|
else if (parc > 1 && IsChannelName(parv[1]))
|
|
{
|
|
safelist_channel_named(source_p, parv[1]);
|
|
return 0;
|
|
}
|
|
|
|
safelist_client_instantiate(source_p, ¶ms);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* safelist_sendq_exceeded()
|
|
*
|
|
* inputs - pointer to client that needs checking
|
|
* outputs - 1 if a client has exceeded the reserved
|
|
* sendq limit, 0 if not
|
|
* side effects - none
|
|
*
|
|
* When safelisting, we only use half of the SendQ at any
|
|
* given time.
|
|
*/
|
|
static int safelist_sendq_exceeded(struct Client *client_p)
|
|
{
|
|
if (rb_linebuf_len(&client_p->localClient->buf_sendq) > (get_sendq(client_p) / 2))
|
|
return YES;
|
|
else
|
|
return NO;
|
|
}
|
|
|
|
/*
|
|
* safelist_client_instantiate()
|
|
*
|
|
* inputs - pointer to Client to be listed,
|
|
* struct ListClient to copy for params
|
|
* outputs - none
|
|
* side effects - the safelist process begins for a
|
|
* client.
|
|
*
|
|
* Please do not ever call this on a non-local client.
|
|
* If you do, you will get SIGSEGV.
|
|
*/
|
|
static void safelist_client_instantiate(struct Client *client_p, struct ListClient *params)
|
|
{
|
|
struct ListClient *self;
|
|
|
|
s_assert(MyClient(client_p));
|
|
s_assert(params != NULL);
|
|
|
|
self = rb_malloc(sizeof(struct ListClient));
|
|
|
|
self->hash_indice = 0;
|
|
self->users_min = params->users_min;
|
|
self->users_max = params->users_max;
|
|
|
|
client_p->localClient->safelist_data = self;
|
|
|
|
sendto_one(client_p, form_str(RPL_LISTSTART), me.name, client_p->name);
|
|
|
|
/* pop the client onto the queue for processing */
|
|
rb_dlinkAddAlloc(client_p, &safelisting_clients);
|
|
|
|
/* give the user some initial data to work with */
|
|
safelist_iterate_client(client_p);
|
|
}
|
|
|
|
/*
|
|
* safelist_client_release()
|
|
*
|
|
* inputs - pointer to Client being listed on
|
|
* outputs - none
|
|
* side effects - the client is no longer being
|
|
* listed
|
|
*
|
|
* Please do not ever call this on a non-local client.
|
|
* If you do, you will get SIGSEGV.
|
|
*/
|
|
static void safelist_client_release(struct Client *client_p)
|
|
{
|
|
s_assert(MyClient(client_p));
|
|
|
|
rb_dlinkFindDestroy(client_p, &safelisting_clients);
|
|
|
|
rb_free(client_p->localClient->safelist_data);
|
|
|
|
client_p->localClient->safelist_data = NULL;
|
|
|
|
sendto_one(client_p, form_str(RPL_LISTEND), me.name, client_p->name);
|
|
}
|
|
|
|
/*
|
|
* safelist_channel_named()
|
|
*
|
|
* inputs - client pointer, channel name
|
|
* outputs - none
|
|
* side effects - a named channel is listed
|
|
*/
|
|
static void safelist_channel_named(struct Client *source_p, const char *name)
|
|
{
|
|
struct Channel *chptr;
|
|
char *p;
|
|
char *n = LOCAL_COPY(name);
|
|
|
|
sendto_one(source_p, form_str(RPL_LISTSTART), me.name, source_p->name);
|
|
|
|
if ((p = strchr(n, ',')))
|
|
*p = '\0';
|
|
|
|
if (*n == '\0')
|
|
{
|
|
sendto_one_numeric(source_p, ERR_NOSUCHNICK, form_str(ERR_NOSUCHNICK), name);
|
|
sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
|
|
return;
|
|
}
|
|
|
|
chptr = find_channel(n);
|
|
|
|
if (chptr == NULL)
|
|
{
|
|
sendto_one_numeric(source_p, ERR_NOSUCHNICK, form_str(ERR_NOSUCHNICK), n);
|
|
sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
|
|
return;
|
|
}
|
|
|
|
if (!SecretChannel(chptr) || IsMember(source_p, chptr))
|
|
sendto_one(source_p, form_str(RPL_LIST), me.name, source_p->name, chptr->chname,
|
|
rb_dlink_list_length(&chptr->members),
|
|
chptr->topic == NULL ? "" : chptr->topic);
|
|
|
|
sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* safelist_one_channel()
|
|
*
|
|
* inputs - client pointer and channel pointer
|
|
* outputs - none
|
|
* side effects - a channel is listed if it meets the
|
|
* requirements
|
|
*/
|
|
static void safelist_one_channel(struct Client *source_p, struct Channel *chptr)
|
|
{
|
|
struct ListClient *safelist_data = source_p->localClient->safelist_data;
|
|
|
|
if (SecretChannel(chptr) && !IsMember(source_p, chptr))
|
|
return;
|
|
|
|
if ((unsigned int)chptr->members.length < safelist_data->users_min
|
|
|| (unsigned int)chptr->members.length > safelist_data->users_max)
|
|
return;
|
|
|
|
sendto_one(source_p, form_str(RPL_LIST), me.name, source_p->name, chptr->chname,
|
|
chptr->members.length, chptr->topic == NULL ? "" : chptr->topic);
|
|
}
|
|
|
|
/*
|
|
* safelist_iterate_client()
|
|
*
|
|
* inputs - client pointer
|
|
* outputs - none
|
|
* side effects - the client's sendq is filled up again
|
|
*/
|
|
static void safelist_iterate_client(struct Client *source_p)
|
|
{
|
|
rb_dlink_node *ptr;
|
|
int iter;
|
|
|
|
for (iter = source_p->localClient->safelist_data->hash_indice; iter < CH_MAX; iter++)
|
|
{
|
|
if (safelist_sendq_exceeded(source_p->from) == YES)
|
|
{
|
|
source_p->localClient->safelist_data->hash_indice = iter;
|
|
return;
|
|
}
|
|
|
|
RB_DLINK_FOREACH(ptr, channelTable[iter].head)
|
|
safelist_one_channel(source_p, (struct Channel *) ptr->data);
|
|
}
|
|
|
|
safelist_client_release(source_p);
|
|
}
|
|
|
|
static void safelist_iterate_clients(void *unused)
|
|
{
|
|
rb_dlink_node *n, *n2;
|
|
|
|
RB_DLINK_FOREACH_SAFE(n, n2, safelisting_clients.head)
|
|
safelist_iterate_client((struct Client *)n->data);
|
|
}
|