solanum-vs-hackint-and-char.../modules/m_gline.c
jilles 61569b65f2 [svn] Cut down quit/part/kick reasons to avoid quit reasons
overflowing the client exiting server notice (from
TOPICLEN to 260). kill reasons become shorter accordingly.
kline/dline/gline reasons become 390.
away messages stay at TOPICLEN for now.
2007-03-04 15:42:55 -08:00

730 lines
18 KiB
C

/*
* ircd-ratbox: A slightly useful ircd.
* m_gline.c: Votes towards globally banning a mask.
*
* 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_gline.c 3225 2007-03-04 23:42:55Z jilles $
*/
#include "stdinc.h"
#include "tools.h"
#include "s_gline.h"
#include "channel.h"
#include "client.h"
#include "common.h"
#include "config.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "hostmask.h"
#include "numeric.h"
#include "commio.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "scache.h"
#include "send.h"
#include "msg.h"
#include "s_serv.h"
#include "hash.h"
#include "parse.h"
#include "modules.h"
#include "s_log.h"
static int mo_gline(struct Client *, struct Client *, int, const char **);
static int mc_gline(struct Client *, struct Client *, int, const char **);
static int ms_gline(struct Client *, struct Client *, int, const char **);
static int mo_ungline(struct Client *, struct Client *, int, const char **);
struct Message gline_msgtab = {
"GLINE", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, {mc_gline, 3}, {ms_gline, 7}, mg_ignore, {mo_gline, 3}}
};
struct Message ungline_msgtab = {
"UNGLINE", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_ungline, 2}}
};
mapi_clist_av1 gline_clist[] = { &gline_msgtab, &ungline_msgtab, NULL };
DECLARE_MODULE_AV1(gline, NULL, NULL, gline_clist, NULL, NULL, "$Revision: 3225 $");
static int majority_gline(struct Client *source_p, const char *user,
const char *host, const char *reason);
static void set_local_gline(struct Client *source_p, const char *user,
const char *host, const char *reason);
static int check_wild_gline(const char *, const char *);
static int invalid_gline(struct Client *, const char *, const char *, char *);
static int remove_temp_gline(const char *, const char *);
/* mo_gline()
*
* inputs - The usual for a m_ function
* output -
* side effects - place a gline if 3 opers agree
*/
static int
mo_gline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
const char *user = NULL;
char *host = NULL; /* user and host of GLINE "victim" */
char *reason = NULL; /* reason for "victims" demise */
char splat[] = "*";
char *ptr;
if(!ConfigFileEntry.glines)
{
sendto_one_notice(source_p, ":GLINE disabled, perhaps you want a clustered or remote KLINE?");
return 0;
}
if(!IsOperGline(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "gline");
return 0;
}
host = strchr(parv[1], '@');
/* specific user@host */
if(host != NULL)
{
user = parv[1];
*(host++) = '\0';
/* gline for "@host", use *@host */
if(*user == '\0')
user = splat;
}
/* just a host? */
else
{
/* ok, its not a host.. abort */
if(strchr(parv[1], '.') == NULL)
{
sendto_one_notice(source_p, ":Invalid parameters");
return 0;
}
user = splat;
host = LOCAL_COPY(parv[1]);
}
reason = LOCAL_COPY(parv[2]);
if(invalid_gline(source_p, user, host, reason))
return 0;
/* Not enough non-wild characters were found, assume they are trying to gline *@*. */
if(check_wild_gline(user, host))
{
if(MyClient(source_p))
sendto_one_notice(source_p,
":Please include at least %d non-wildcard characters with the user@host",
ConfigFileEntry.min_nonwildcard);
return 0;
}
if((ptr = strchr(host, '/')) != NULL)
{
int bitlen;
bitlen = strtol(++ptr, NULL, 10);
/* ipv4? */
if(strchr(host, ':') == NULL)
{
if(bitlen < ConfigFileEntry.gline_min_cidr)
{
sendto_one_notice(source_p, ":Cannot set G-Lines with cidr length < %d",
ConfigFileEntry.gline_min_cidr);
return 0;
}
}
/* ipv6 */
else if(bitlen < ConfigFileEntry.gline_min_cidr6)
{
sendto_one_notice(source_p, ":Cannot set G-Lines with cidr length < %d",
ConfigFileEntry.gline_min_cidr6);
return 0;
}
}
/* inform users about the gline before we call majority_gline()
* so already voted comes below gline request --fl
*/
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s!%s@%s on %s is requesting gline for [%s@%s] [%s]",
source_p->name, source_p->username,
source_p->host, me.name, user, host, reason);
ilog(L_GLINE, "R %s %s %s %s %s %s %s",
source_p->name, source_p->username, source_p->host,
source_p->user->server, user, host, reason);
/* If at least 3 opers agree this user should be G lined then do it */
majority_gline(source_p, user, host, reason);
/* 4 param version for hyb-7 servers */
sendto_server(NULL, NULL, CAP_GLN|CAP_TS6, NOCAPS,
":%s GLINE %s %s :%s",
use_id(source_p), user, host, reason);
sendto_server(NULL, NULL, CAP_GLN, CAP_TS6,
":%s GLINE %s %s :%s",
source_p->name, user, host, reason);
/* 8 param for hyb-6 */
sendto_server(NULL, NULL, NOCAPS, CAP_GLN,
":%s GLINE %s %s %s %s %s %s :%s",
me.name, source_p->name, source_p->username,
source_p->host, source_p->user->server,
user, host, reason);
return 0;
}
/* mc_gline()
*/
static int
mc_gline(struct Client *client_p, struct Client *source_p,
int parc, const char *parv[])
{
struct Client *acptr;
const char *user;
const char *host;
char *reason;
char *ptr;
/* hyb6 allows empty gline reasons */
if(parc < 4 || EmptyString(parv[3]))
return 0;
acptr = source_p;
user = parv[1];
host = parv[2];
reason = LOCAL_COPY(parv[3]);
if(invalid_gline(acptr, user, host, reason))
return 0;
sendto_server(client_p, NULL, CAP_GLN|CAP_TS6, NOCAPS,
":%s GLINE %s %s :%s",
use_id(acptr), user, host, reason);
sendto_server(client_p, NULL, CAP_GLN, CAP_TS6,
":%s GLINE %s %s :%s",
acptr->name, user, host, reason);
sendto_server(client_p, NULL, NOCAPS, CAP_GLN,
":%s GLINE %s %s %s %s %s %s :%s",
acptr->user->server, acptr->name,
acptr->username, acptr->host,
acptr->user->server, user, host, reason);
if(!ConfigFileEntry.glines)
return 0;
/* check theres enough non-wildcard chars */
if(check_wild_gline(user, host))
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s!%s@%s on %s is requesting a gline without "
"%d non-wildcard characters for [%s@%s] [%s]",
acptr->name, acptr->username,
acptr->host, acptr->user->server,
ConfigFileEntry.min_nonwildcard,
user, host, reason);
return 0;
}
if((ptr = strchr(host, '/')) != NULL)
{
int bitlen;
bitlen = strtol(++ptr, NULL, 10);
/* ipv4? */
if(strchr(host, ':') == NULL)
{
if(bitlen < ConfigFileEntry.gline_min_cidr)
{
sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s!%s@%s on %s is requesting a "
"gline with a cidr mask < %d for [%s@%s] [%s]",
acptr->name, acptr->username, acptr->host,
acptr->user->server,
ConfigFileEntry.gline_min_cidr,
user, host, reason);
return 0;
}
}
/* ipv6 */
else if(bitlen < ConfigFileEntry.gline_min_cidr6)
{
sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s!%s@%s on %s is requesting a "
"gline with a cidr mask < %d for [%s@%s] [%s]",
acptr->name, acptr->username, acptr->host,
acptr->user->server,
ConfigFileEntry.gline_min_cidr6,
user, host, reason);
return 0;
}
}
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s!%s@%s on %s is requesting gline for [%s@%s] [%s]",
acptr->name, acptr->username, acptr->host,
acptr->user->server, user, host, reason);
ilog(L_GLINE, "R %s %s %s %s %s %s %s",
source_p->name, source_p->username, source_p->host,
source_p->user->server, user, host, reason);
/* If at least 3 opers agree this user should be G lined then do it */
majority_gline(acptr, user, host, reason);
return 0;
}
/* ms_gline()
*
* inputs - The usual for a m_ function
* output -
* side effects - attempts to place a gline, if 3 opers agree
*/
static int
ms_gline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
struct Client *acptr;
const char *user;
const char *host;
char *reason;
/* hyb6 allows empty gline reasons */
if(parc < 8 || EmptyString(parv[7]))
return 0;
/* client doesnt exist.. someones messing */
if((acptr = find_client(parv[1])) == NULL)
return 0;
/* client that sent the gline, isnt on the server that sent
* the gline out. somethings fucked.
*/
if(acptr->servptr != source_p)
return 0;
user = parv[5];
host = parv[6];
reason = LOCAL_COPY(parv[7]);
if(invalid_gline(acptr, user, host, reason))
return 0;
sendto_server(client_p, NULL, CAP_GLN|CAP_TS6, NOCAPS,
":%s GLINE %s %s :%s",
use_id(acptr), user, host, reason);
sendto_server(client_p, NULL, CAP_GLN, CAP_TS6,
":%s GLINE %s %s :%s",
acptr->name, user, host, reason);
sendto_server(client_p, NULL, NOCAPS, CAP_GLN,
":%s GLINE %s %s %s %s %s %s :%s",
acptr->user->server, acptr->name,
acptr->username, acptr->host,
acptr->user->server, user, host, reason);
if(!ConfigFileEntry.glines)
return 0;
/* check theres enough non-wildcard chars */
if(check_wild_gline(user, host))
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s!%s@%s on %s is requesting a gline without "
"%d non-wildcard characters for [%s@%s] [%s]",
acptr->name, acptr->username,
acptr->host, acptr->user->server,
ConfigFileEntry.min_nonwildcard,
user, host, reason);
return 0;
}
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s!%s@%s on %s is requesting gline for [%s@%s] [%s]",
acptr->name, acptr->username, acptr->host,
acptr->user->server, user, host, reason);
ilog(L_GLINE, "R %s %s %s %s %s %s %s",
acptr->name, acptr->username, acptr->host,
acptr->user->server, user, host, reason);
/* If at least 3 opers agree this user should be G lined then do it */
majority_gline(acptr, user, host, reason);
return 0;
}
/* mo_ungline()
*
* parv[0] = sender nick
* parv[1] = gline to remove
*/
static int
mo_ungline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
const char *user;
char *h = LOCAL_COPY(parv[1]);
char *host;
char splat[] = "*";
if(!ConfigFileEntry.glines)
{
sendto_one_notice(source_p, ":UNGLINE disabled, perhaps you want UNKLINE?");
return 0;
}
if(!IsOperUnkline(source_p) || !IsOperGline(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "unkline");
return 0;
}
if((host = strchr(h, '@')) || *h == '*')
{
/* Explicit user@host mask given */
if(host)
{
*host++ = '\0';
/* check for @host */
if(*h)
user = h;
else
user = splat;
if(!*host)
host = splat;
}
else
{
user = splat;
host = h;
}
}
else
{
sendto_one_notice(source_p, ":Invalid parameters");
return 0;
}
if(remove_temp_gline(user, host))
{
sendto_one_notice(source_p, ":Un-glined [%s@%s]", user, host);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s has removed the G-Line for: [%s@%s]",
get_oper_name(source_p), user, host);
ilog(L_GLINE, "U %s %s %s %s %s %s",
source_p->name, source_p->username, source_p->host,
source_p->user->server, user, host);
}
else
{
sendto_one_notice(source_p, ":No G-Line for %s@%s", user, host);
}
return 0;
}
/*
* check_wild_gline
*
* inputs - user, host of gline
* output - 1 if not enough non-wildchar char's, 0 if ok
* side effects - NONE
*/
static int
check_wild_gline(const char *user, const char *host)
{
const char *p;
char tmpch;
int nonwild;
nonwild = 0;
p = user;
while ((tmpch = *p++))
{
if(!IsKWildChar(tmpch))
{
/* enough of them, break */
if(++nonwild >= ConfigFileEntry.min_nonwildcard)
break;
}
}
if(nonwild < ConfigFileEntry.min_nonwildcard)
{
/* user doesnt, try host */
p = host;
while ((tmpch = *p++))
{
if(!IsKWildChar(tmpch))
if(++nonwild >= ConfigFileEntry.min_nonwildcard)
break;
}
}
if(nonwild < ConfigFileEntry.min_nonwildcard)
return 1;
else
return 0;
}
/* invalid_gline
*
* inputs - pointer to source client, ident, host and reason
* outputs - 1 if invalid, 0 if valid
* side effects -
*/
static int
invalid_gline(struct Client *source_p, const char *luser,
const char *lhost, char *lreason)
{
if(strchr(luser, '!'))
{
sendto_one_notice(source_p, ":Invalid character '!' in gline");
return 1;
}
if(strlen(lreason) > BANREASONLEN)
lreason[BANREASONLEN] = '\0';
return 0;
}
/*
* set_local_gline
*
* inputs - pointer to oper nick/username/host/server,
* victim user/host and reason
* output - NONE
* side effects -
*/
static void
set_local_gline(struct Client *source_p, const char *user,
const char *host, const char *reason)
{
char buffer[IRCD_BUFSIZE];
struct ConfItem *aconf;
const char *current_date;
char *my_reason;
char *oper_reason;
current_date = smalldate();
my_reason = LOCAL_COPY(reason);
aconf = make_conf();
aconf->status = CONF_GLINE;
aconf->flags |= CONF_FLAGS_TEMPORARY;
if(strlen(my_reason) > BANREASONLEN)
my_reason[BANREASONLEN-1] = '\0';
if((oper_reason = strchr(my_reason, '|')) != NULL)
{
*oper_reason = '\0';
oper_reason++;
if(!EmptyString(oper_reason))
DupString(aconf->spasswd, oper_reason);
}
ircsnprintf(buffer, sizeof(buffer), "%s (%s)", reason, current_date);
DupString(aconf->passwd, buffer);
DupString(aconf->user, user);
DupString(aconf->host, host);
aconf->hold = CurrentTime + ConfigFileEntry.gline_time;
add_gline(aconf);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s!%s@%s on %s has triggered gline for [%s@%s] [%s]",
source_p->name, source_p->username,
source_p->host, source_p->user->server,
user, host, reason);
ilog(L_GLINE, "T %s %s %s %s %s %s %s",
source_p->name, source_p->username, source_p->host,
source_p->user->server, user, host, reason);
check_glines();
}
/* majority_gline()
*
* input - client doing gline, user, host and reason of gline
* output - YES if there are 3 different opers/servers agree, else NO
* side effects -
*/
static int
majority_gline(struct Client *source_p, const char *user,
const char *host, const char *reason)
{
dlink_node *pending_node;
struct gline_pending *pending;
/* to avoid desync.. --fl */
cleanup_glines(NULL);
/* if its already glined, why bother? :) -- fl_ */
if(find_is_glined(host, user))
return NO;
DLINK_FOREACH(pending_node, pending_glines.head)
{
pending = pending_node->data;
if((irccmp(pending->user, user) == 0) &&
(irccmp(pending->host, host) == 0))
{
/* check oper or server hasnt already voted */
if(((irccmp(pending->oper_user1, source_p->username) == 0) ||
(irccmp(pending->oper_host1, source_p->host) == 0)))
{
sendto_realops_snomask(SNO_GENERAL, L_ALL, "oper has already voted");
return NO;
}
else if(irccmp(pending->oper_server1, source_p->user->server) == 0)
{
sendto_realops_snomask(SNO_GENERAL, L_ALL, "server has already voted");
return NO;
}
if(pending->oper_user2[0] != '\0')
{
/* if two other opers on two different servers have voted yes */
if(((irccmp(pending->oper_user2, source_p->username) == 0) ||
(irccmp(pending->oper_host2, source_p->host) == 0)))
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"oper has already voted");
return NO;
}
else if(irccmp(pending->oper_server2, source_p->user->server) == 0)
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"server has already voted");
return NO;
}
/* trigger the gline using the original reason --fl */
set_local_gline(source_p, user, host,
pending->reason1);
cleanup_glines(NULL);
return YES;
}
else
{
strlcpy(pending->oper_nick2, source_p->name,
sizeof(pending->oper_nick2));
strlcpy(pending->oper_user2, source_p->username,
sizeof(pending->oper_user2));
strlcpy(pending->oper_host2, source_p->host,
sizeof(pending->oper_host2));
DupString(pending->reason2, reason);
pending->oper_server2 = find_or_add(source_p->user->server);
pending->last_gline_time = CurrentTime;
pending->time_request2 = CurrentTime;
return NO;
}
}
}
/* no pending gline, create a new one */
pending = (struct gline_pending *)
MyMalloc(sizeof(struct gline_pending));
strlcpy(pending->oper_nick1, source_p->name,
sizeof(pending->oper_nick1));
strlcpy(pending->oper_user1, source_p->username,
sizeof(pending->oper_user1));
strlcpy(pending->oper_host1, source_p->host,
sizeof(pending->oper_host1));
pending->oper_server1 = find_or_add(source_p->user->server);
strlcpy(pending->user, user, sizeof(pending->user));
strlcpy(pending->host, host, sizeof(pending->host));
DupString(pending->reason1, reason);
pending->reason2 = NULL;
pending->last_gline_time = CurrentTime;
pending->time_request1 = CurrentTime;
dlinkAddAlloc(pending, &pending_glines);
return NO;
}
/* remove_temp_gline()
*
* inputs - username, hostname to ungline
* outputs -
* side effects - tries to ungline anything that matches
*/
static int
remove_temp_gline(const char *user, const char *host)
{
struct ConfItem *aconf;
dlink_node *ptr;
struct irc_sockaddr_storage addr, caddr;
int bits, cbits;
int mtype, gtype;
mtype = parse_netmask(host, (struct sockaddr *)&addr, &bits);
DLINK_FOREACH(ptr, glines.head)
{
aconf = ptr->data;
gtype = parse_netmask(aconf->host, (struct sockaddr *)&caddr, &cbits);
if(gtype != mtype || (user && irccmp(user, aconf->user)))
continue;
if(gtype == HM_HOST)
{
if(irccmp(aconf->host, host))
continue;
}
else if(bits != cbits ||
!comp_with_mask_sock((struct sockaddr *)&addr,
(struct sockaddr *)&caddr, bits))
continue;
dlinkDestroy(ptr, &glines);
delete_one_address_conf(aconf->host, aconf);
return YES;
}
return NO;
}