elemental-ircd/modules/m_dline.c

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/*
* ircd-ratbox: A slightly useful ircd.
* m_dline.c: Bans/unbans a user.
*
* 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_dline.c 3225 2007-03-04 23:42:55Z jilles $
*/
#include "stdinc.h"
#include "channel.h"
#include "class.h"
#include "client.h"
#include "common.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "hostmask.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "s_log.h"
#include "send.h"
#include "hash.h"
#include "s_serv.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
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#include "reject.h"
static int mo_dline(struct Client *, struct Client *, int, const char **);
static int mo_undline(struct Client *, struct Client *, int, const char **);
struct Message dline_msgtab = {
"DLINE", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_dline, 2}}
};
struct Message undline_msgtab = {
"UNDLINE", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_undline, 2}}
};
mapi_clist_av1 dline_clist[] = { &dline_msgtab, &undline_msgtab, NULL };
DECLARE_MODULE_AV1(dline, NULL, NULL, dline_clist, NULL, NULL, "$Revision: 3225 $");
static int valid_comment(char *comment);
static int flush_write(struct Client *, FILE *, char *, char *);
static int remove_temp_dline(struct ConfItem *);
/* mo_dline()
*
* parv[1] - dline to add
* parv[2] - reason
*/
static int
mo_dline(struct Client *client_p, struct Client *source_p,
int parc, const char *parv[])
{
char def[] = "No Reason";
const char *dlhost;
char *oper_reason;
char *reason = def;
char cidr_form_host[HOSTLEN + 1];
struct ConfItem *aconf;
int bits;
char dlbuffer[IRCD_BUFSIZE];
const char *current_date;
int tdline_time = 0;
int loc = 1;
if(!IsOperK(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "kline");
return 0;
}
if((tdline_time = valid_temp_time(parv[loc])) >= 0)
loc++;
if(parc < loc + 1)
{
sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
me.name, source_p->name, "DLINE");
return 0;
}
dlhost = parv[loc];
strlcpy(cidr_form_host, dlhost, sizeof(cidr_form_host));
if(!parse_netmask(dlhost, NULL, &bits))
{
sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line",
me.name, source_p->name);
return 0;
}
loc++;
if(parc >= loc + 1) /* host :reason */
{
if(!EmptyString(parv[loc]))
reason = LOCAL_COPY(parv[loc]);
if(!valid_comment(reason))
{
sendto_one(source_p,
":%s NOTICE %s :Invalid character '\"' in comment",
me.name, source_p->name);
return 0;
}
}
if(IsOperAdmin(source_p))
{
if(bits < 8)
{
sendto_one(source_p,
":%s NOTICE %s :For safety, bitmasks less than 8 require conf access.",
me.name, parv[0]);
return 0;
}
}
else
{
if(bits < 16)
{
sendto_one(source_p,
":%s NOTICE %s :Dline bitmasks less than 16 are for admins only.",
me.name, parv[0]);
return 0;
}
}
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if(ConfigFileEntry.non_redundant_klines)
{
struct rb_sockaddr_storage daddr;
const char *creason;
int t = AF_INET, ty, b;
ty = parse_netmask(dlhost, (struct sockaddr *)&daddr, &b);
#ifdef IPV6
if(ty == HM_IPV6)
t = AF_INET6;
else
#endif
t = AF_INET;
if((aconf = find_dline((struct sockaddr *)&daddr)) != NULL)
{
int bx;
parse_netmask(aconf->host, NULL, &bx);
if(b >= bx)
{
creason = aconf->passwd ? aconf->passwd : "<No Reason>";
if(IsConfExemptKline(aconf))
sendto_one_notice(source_p,
":[%s] is (E)d-lined by [%s] - %s",
dlhost, aconf->host, creason);
else
sendto_one_notice(source_p,
":[%s] already D-lined by [%s] - %s",
dlhost, aconf->host, creason);
return 0;
}
}
}
set_time();
current_date = smalldate();
aconf = make_conf();
aconf->status = CONF_DLINE;
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aconf->host = rb_strdup(dlhost);
/* Look for an oper reason */
if((oper_reason = strchr(reason, '|')) != NULL)
{
*oper_reason = '\0';
oper_reason++;
if(!EmptyString(oper_reason))
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aconf->spasswd = rb_strdup(oper_reason);
}
if(tdline_time > 0)
{
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rb_snprintf(dlbuffer, sizeof(dlbuffer),
"Temporary D-line %d min. - %s (%s)",
(int) (tdline_time / 60), reason, current_date);
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aconf->passwd = rb_strdup(dlbuffer);
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aconf->hold = rb_current_time() + tdline_time;
add_temp_dline(aconf);
if(EmptyString(oper_reason))
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s added temporary %d min. D-Line for [%s] [%s]",
get_oper_name(source_p), tdline_time / 60,
aconf->host, reason);
ilog(L_KLINE, "D %s %d %s %s",
get_oper_name(source_p), tdline_time / 60,
aconf->host, reason);
}
else
{
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s added temporary %d min. D-Line for [%s] [%s|%s]",
get_oper_name(source_p), tdline_time / 60,
aconf->host, reason, oper_reason);
ilog(L_KLINE, "D %s %d %s %s|%s",
get_oper_name(source_p), tdline_time / 60,
aconf->host, reason, oper_reason);
}
sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line for [%s]",
me.name, source_p->name, tdline_time / 60, aconf->host);
}
else
{
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rb_snprintf(dlbuffer, sizeof(dlbuffer), "%s (%s)", reason, current_date);
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aconf->passwd = rb_strdup(dlbuffer);
add_conf_by_address(aconf->host, CONF_DLINE, NULL, aconf);
write_confitem(DLINE_TYPE, source_p, NULL, aconf->host, reason,
oper_reason, current_date, 0);
}
check_dlines();
return 0;
}
/* mo_undline()
*
* parv[1] = dline to remove
*/
static int
mo_undline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
FILE *in;
FILE *out;
char buf[BUFSIZE], buff[BUFSIZE], temppath[BUFSIZE], *p;
const char *filename, *found_cidr;
const char *cidr;
struct ConfItem *aconf;
int pairme = NO, error_on_write = NO;
mode_t oldumask;
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rb_snprintf(temppath, sizeof(temppath), "%s.tmp", ConfigFileEntry.dlinefile);
if(!IsOperUnkline(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "unkline");
return 0;
}
cidr = parv[1];
if(parse_netmask(cidr, NULL, NULL) == HM_HOST)
{
[svn] Backport from early 3.x: -- nenolod 2006/09/27 16:39:14 UTC (20060927-2178) Log: - remove "Processing connection to foobar.net" message Changes: Modified: +0 -3 trunk/src/s_auth.c (File Modified) nenolod 2006/09/27 16:34:26 UTC (20060927-2176) Log: - missed the processing connection one (actually, we can probably nuke this one) Changes: Modified: +1 -2 trunk/src/s_auth.c (File Modified) river 2006/09/27 16:33:05 UTC (20060927-2174) Log: get_client_name = stupid Changes: Modified: +10 -7 trunk/modules/core/m_kill.c (File Modified) nenolod 2006/09/27 16:32:37 UTC (20060927-2172) Log: - remove excessive arguments Changes: Modified: +1 -2 trunk/src/s_conf.c (File Modified) +1 -1 trunk/src/s_user.c (File Modified) nenolod 2006/09/27 16:30:59 UTC (20060927-2170) Log: - use sendto_one_notice() for on-connect notices too. Changes: Modified: +10 -10 trunk/src/s_auth.c (File Modified) nenolod 2006/09/27 16:27:01 UTC (20060927-2168) Log: - use sendto_one_notice() in the core, too. Changes: Modified: +2 -2 trunk/src/chmode.c (File Modified) +8 -15 trunk/src/modules.c (File Modified) +3 -5 trunk/src/s_conf.c (File Modified) +1 -2 trunk/src/s_newconf.c (File Modified) +20 -57 trunk/src/s_user.c (File Modified) river 2006/09/27 16:19:25 UTC (20060927-2166) Log: the KILL command will use get_client_name(, SHOW_IP) instead of target->name, and will show a more useful error for local opers Changes: Modified: +6 -4 trunk/modules/core/m_kill.c (File Modified) nenolod 2006/09/27 16:09:48 UTC (20060927-2164) Log: - fix bugs in sendto_one_notice()/sendto_one_numeric() where a client identifier won't be sent to unregistered clients Changes: Modified: +4 -2 trunk/src/send.c (File Modified) nenolod 2006/09/27 16:05:46 UTC (20060927-2161) Log: - back out r2159 Changes: Modified: +1 -1 trunk/include/client.h (File Modified) nenolod 2006/09/27 16:04:05 UTC (20060927-2159) Log: - get_id(): fall back to "*" if client has no known name Changes: Modified: +1 -1 trunk/include/client.h (File Modified) nenolod 2006/09/27 16:01:29 UTC (20060927-2157) Log: - convert to sendto_one_notice(). Changes: Modified: +2 -3 trunk/unsupported/m_clearchan.c (File Modified) +4 -6 trunk/unsupported/m_force.c (File Modified) nenolod 2006/09/27 15:57:11 UTC (20060927-2155) Log: - use sendto_one_notice() in many places instead of sendto_one(source_p, ":%s NOTICE %s :", ...); Changes: Modified: +10 -25 trunk/extensions/example_module.c (File Modified) +5 -14 trunk/extensions/hurt.c (File Modified) +1 -2 trunk/extensions/m_42.c (File Modified) +7 -12 trunk/extensions/m_mkpasswd.c (File Modified) +1 -2 trunk/extensions/m_ojoin.c (File Modified) +1 -2 trunk/extensions/m_opme.c (File Modified) +3 -3 trunk/extensions/spy_whois_notice.c (File Modified) +3 -3 trunk/extensions/spy_whois_notice_global.c (File Modified) +3 -7 trunk/modules/core/m_die.c (File Modified) +2 -4 trunk/modules/core/m_kill.c (File Modified) +2 -2 trunk/modules/core/m_squit.c (File Modified) +1 -2 trunk/modules/m_challenge.c (File Modified) +11 -15 trunk/modules/m_connect.c (File Modified) +20 -28 trunk/modules/m_dline.c (File Modified) +2 -2 trunk/modules/m_etrace.c (File Modified) +11 -21 trunk/modules/m_gline.c (File Modified) +2 -4 trunk/modules/m_kline.c (File Modified) +1 -2 trunk/modules/m_rehash.c (File Modified) +3 -7 trunk/modules/m_restart.c (File Modified) +31 -45 trunk/modules/m_set.c (File Modified) +2 -4 trunk/modules/m_testmask.c (File Modified) +5 -8 trunk/modules/m_unreject.c (File Modified) +2 -5 trunk/modules/m_xline.c (File Modified) --
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sendto_one_notice(source_p, ":Invalid D-Line");
return 0;
}
aconf = find_exact_conf_by_address(cidr, CONF_DLINE, NULL);
if(aconf == NULL)
{
sendto_one_notice(source_p, ":No D-Line for %s", cidr);
return 0;
}
strlcpy(buf, aconf->host, sizeof buf);
if(remove_temp_dline(aconf))
{
sendto_one(source_p,
":%s NOTICE %s :Un-dlined [%s] from temporary D-lines",
me.name, parv[0], buf);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s has removed the temporary D-Line for: [%s]",
get_oper_name(source_p), buf);
ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), buf);
return 0;
}
filename = get_conf_name(DLINE_TYPE);
if((in = fopen(filename, "r")) == 0)
{
sendto_one(source_p, ":%s NOTICE %s :Cannot open %s", me.name, parv[0], filename);
return 0;
}
oldumask = umask(0);
if((out = fopen(temppath, "w")) == 0)
{
sendto_one(source_p, ":%s NOTICE %s :Cannot open %s", me.name, parv[0], temppath);
fclose(in);
umask(oldumask);
return 0;
}
umask(oldumask);
while (fgets(buf, sizeof(buf), in))
{
strlcpy(buff, buf, sizeof(buff));
if((p = strchr(buff, '\n')) != NULL)
*p = '\0';
if((*buff == '\0') || (*buff == '#'))
{
if(!error_on_write)
flush_write(source_p, out, buf, temppath);
continue;
}
if((found_cidr = getfield(buff)) == NULL)
{
if(!error_on_write)
flush_write(source_p, out, buf, temppath);
continue;
}
if(irccmp(found_cidr, aconf->host) == 0)
{
pairme++;
}
else
{
if(!error_on_write)
flush_write(source_p, out, buf, temppath);
continue;
}
}
fclose(in);
if (fclose(out))
error_on_write = YES;
if(error_on_write)
{
sendto_one(source_p,
":%s NOTICE %s :Couldn't write D-line file, aborted",
me.name, parv[0]);
return 0;
}
else if(!pairme)
{
sendto_one_notice(source_p, ":Cannot find D-Line for %s in file",
aconf->host);
if(temppath != NULL)
(void) unlink(temppath);
return 0;
}
if (rename(temppath, filename))
{
sendto_one_notice(source_p, ":Couldn't rename temp file, aborted");
return 0;
}
sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed", me.name, parv[0], aconf->host);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s has removed the D-Line for: [%s]", get_oper_name(source_p), aconf->host);
ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), aconf->host);
delete_one_address_conf(aconf->host, aconf);
return 0;
}
/*
* valid_comment
* inputs - pointer to client
* - pointer to comment
* output - 0 if no valid comment, 1 if valid
* side effects - NONE
*/
static int
valid_comment(char *comment)
{
if(strchr(comment, '"'))
return 0;
if(strlen(comment) > BANREASONLEN)
comment[BANREASONLEN] = '\0';
return 1;
}
/*
* flush_write()
*
* inputs - pointer to client structure of oper requesting unkline
* - out is the file descriptor
* - buf is the buffer to write
* - ntowrite is the expected number of character to be written
* - temppath is the temporary file name to be written
* output - YES for error on write
* - NO for success
* side effects - if successful, the buf is written to output file
* if a write failure happesn, and the file pointed to
* by temppath, if its non NULL, is removed.
*
* The idea here is, to be as robust as possible when writing to the
* kline file.
*
* -Dianora
*/
static int
flush_write(struct Client *source_p, FILE * out, char *buf, char *temppath)
{
int error_on_write = (fputs(buf, out) < 0) ? YES : NO;
if(error_on_write)
{
[svn] Backport from early 3.x: -- nenolod 2006/09/27 16:39:14 UTC (20060927-2178) Log: - remove "Processing connection to foobar.net" message Changes: Modified: +0 -3 trunk/src/s_auth.c (File Modified) nenolod 2006/09/27 16:34:26 UTC (20060927-2176) Log: - missed the processing connection one (actually, we can probably nuke this one) Changes: Modified: +1 -2 trunk/src/s_auth.c (File Modified) river 2006/09/27 16:33:05 UTC (20060927-2174) Log: get_client_name = stupid Changes: Modified: +10 -7 trunk/modules/core/m_kill.c (File Modified) nenolod 2006/09/27 16:32:37 UTC (20060927-2172) Log: - remove excessive arguments Changes: Modified: +1 -2 trunk/src/s_conf.c (File Modified) +1 -1 trunk/src/s_user.c (File Modified) nenolod 2006/09/27 16:30:59 UTC (20060927-2170) Log: - use sendto_one_notice() for on-connect notices too. Changes: Modified: +10 -10 trunk/src/s_auth.c (File Modified) nenolod 2006/09/27 16:27:01 UTC (20060927-2168) Log: - use sendto_one_notice() in the core, too. Changes: Modified: +2 -2 trunk/src/chmode.c (File Modified) +8 -15 trunk/src/modules.c (File Modified) +3 -5 trunk/src/s_conf.c (File Modified) +1 -2 trunk/src/s_newconf.c (File Modified) +20 -57 trunk/src/s_user.c (File Modified) river 2006/09/27 16:19:25 UTC (20060927-2166) Log: the KILL command will use get_client_name(, SHOW_IP) instead of target->name, and will show a more useful error for local opers Changes: Modified: +6 -4 trunk/modules/core/m_kill.c (File Modified) nenolod 2006/09/27 16:09:48 UTC (20060927-2164) Log: - fix bugs in sendto_one_notice()/sendto_one_numeric() where a client identifier won't be sent to unregistered clients Changes: Modified: +4 -2 trunk/src/send.c (File Modified) nenolod 2006/09/27 16:05:46 UTC (20060927-2161) Log: - back out r2159 Changes: Modified: +1 -1 trunk/include/client.h (File Modified) nenolod 2006/09/27 16:04:05 UTC (20060927-2159) Log: - get_id(): fall back to "*" if client has no known name Changes: Modified: +1 -1 trunk/include/client.h (File Modified) nenolod 2006/09/27 16:01:29 UTC (20060927-2157) Log: - convert to sendto_one_notice(). Changes: Modified: +2 -3 trunk/unsupported/m_clearchan.c (File Modified) +4 -6 trunk/unsupported/m_force.c (File Modified) nenolod 2006/09/27 15:57:11 UTC (20060927-2155) Log: - use sendto_one_notice() in many places instead of sendto_one(source_p, ":%s NOTICE %s :", ...); Changes: Modified: +10 -25 trunk/extensions/example_module.c (File Modified) +5 -14 trunk/extensions/hurt.c (File Modified) +1 -2 trunk/extensions/m_42.c (File Modified) +7 -12 trunk/extensions/m_mkpasswd.c (File Modified) +1 -2 trunk/extensions/m_ojoin.c (File Modified) +1 -2 trunk/extensions/m_opme.c (File Modified) +3 -3 trunk/extensions/spy_whois_notice.c (File Modified) +3 -3 trunk/extensions/spy_whois_notice_global.c (File Modified) +3 -7 trunk/modules/core/m_die.c (File Modified) +2 -4 trunk/modules/core/m_kill.c (File Modified) +2 -2 trunk/modules/core/m_squit.c (File Modified) +1 -2 trunk/modules/m_challenge.c (File Modified) +11 -15 trunk/modules/m_connect.c (File Modified) +20 -28 trunk/modules/m_dline.c (File Modified) +2 -2 trunk/modules/m_etrace.c (File Modified) +11 -21 trunk/modules/m_gline.c (File Modified) +2 -4 trunk/modules/m_kline.c (File Modified) +1 -2 trunk/modules/m_rehash.c (File Modified) +3 -7 trunk/modules/m_restart.c (File Modified) +31 -45 trunk/modules/m_set.c (File Modified) +2 -4 trunk/modules/m_testmask.c (File Modified) +5 -8 trunk/modules/m_unreject.c (File Modified) +2 -5 trunk/modules/m_xline.c (File Modified) --
2007-01-25 07:23:01 +00:00
sendto_one_notice(source_p, ":Unable to write to %s", temppath);
fclose(out);
if(temppath != NULL)
(void) unlink(temppath);
}
return (error_on_write);
}
/* remove_temp_dline()
*
* inputs - confitem to undline
* outputs -
* side effects - tries to undline anything that matches
*/
static int
remove_temp_dline(struct ConfItem *aconf)
{
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rb_dlink_node *ptr;
int i;
for (i = 0; i < LAST_TEMP_TYPE; i++)
{
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RB_DLINK_FOREACH(ptr, temp_dlines[i].head)
{
if (aconf == ptr->data)
{
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rb_dlinkDestroy(ptr, &temp_dlines[i]);
delete_one_address_conf(aconf->host, aconf);
return YES;
}
}
}
return NO;
}