elemental-ircd/modules/m_scan.c

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/*
* charybdis: an advanced Internet Relay Chat Daemon(ircd).
* m_scan.c: Provides information about various targets on various topics
*
* Copyright (c) 2006 William Pitcock <nenolod -at- 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.
*
* $Id: m_scan.c 1853 2006-08-24 18:30:52Z jilles $
*/
#include "stdinc.h"
#include "class.h"
#include "hook.h"
#include "client.h"
#include "hash.h"
#include "common.h"
#include "hash.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "s_serv.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "s_user.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
static int mo_scan(struct Client *, struct Client *, int, const char **);
static int scan_umodes(struct Client *, struct Client *, int, const char **);
/*static int scan_cmodes(struct Client *, struct Client *, int, const char **);*/
struct Message scan_msgtab = {
"SCAN", 0, 0, 0, MFLG_SLOW,
{mg_ignore, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_scan, 2}}
};
mapi_clist_av1 scan_clist[] = { &scan_msgtab, NULL };
DECLARE_MODULE_AV1(scan, NULL, NULL, scan_clist, NULL, NULL, "$Revision: 1853 $");
typedef int (*scan_handler)(struct Client *, struct Client *, int,
const char **);
struct scan_cmd {
const char *name;
int operlevel;
scan_handler handler;
} scan_cmds[] = {
{"UMODES", L_OPER, scan_umodes},
{NULL, 0, NULL}
};
static const char *empty_sockhost = "255.255.255.255";
static const char *spoofed_sockhost = "0";
/*
* m_scan
* parv[0] = sender prefix
* parv[1] = options [or target]
* parv[2] = [target]
*/
static int
mo_scan(struct Client *client_p, struct Client *source_p, int parc,
const char *parv[])
{
struct scan_cmd *sptr;
for (sptr = scan_cmds; sptr->name != NULL; sptr++)
{
if (!irccmp(sptr->name, parv[1]))
{
if (sptr->operlevel == L_ADMIN &&
!IsOperAdmin(source_p))
return -1;
else
return sptr->handler(client_p, source_p, parc, parv);
}
}
sendto_one_notice(source_p, ":*** %s is not an implemented SCAN target",
parv[1]);
return 0;
}
static int
scan_umodes(struct Client *client_p, struct Client *source_p, int parc,
const char *parv[])
{
unsigned int allowed_umodes = 0, disallowed_umodes = 0;
int what = MODE_ADD;
int mode;
int list_users = YES;
int list_max = 0;
int list_count = 0, count = 0;
const char *mask = NULL;
const char *c;
struct Client *target_p;
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rb_dlink_list *target_list = &lclient_list; /* local clients only by default */
rb_dlink_node *tn;
int i;
const char *sockhost;
char buf[512];
if (parc < 3)
{
if (MyClient(source_p))
sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
me.name, source_p->name, "SCAN UMODES");
return -1;
}
for (c = parv[2]; *c; c++)
{
switch(*c)
{
case '+':
what = MODE_ADD;
break;
case '-':
what = MODE_DEL;
break;
default:
if ((mode = user_modes[(unsigned char) *c]) != 0)
{
if (what == MODE_ADD)
allowed_umodes |= mode;
else
disallowed_umodes |= mode;
}
}
}
for (i = 3; i < parc; i++)
{
if (!irccmp(parv[i], "no-list"))
list_users = NO;
else if (!irccmp(parv[i], "list"))
list_users = YES;
else if (!irccmp(parv[i], "global"))
target_list = &global_client_list;
else if (i < (parc - 1))
{
if (!irccmp(parv[i], "list-max"))
list_max = atoi(parv[++i]);
else if (!irccmp(parv[i], "mask"))
mask = parv[++i];
}
}
if (target_list == &global_client_list && list_users)
{
if (IsOperSpy(source_p))
{
if (!ConfigFileEntry.operspy_dont_care_user_info)
{
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rb_strlcpy(buf, "UMODES", sizeof buf);
for (i = 2; i < parc; i++)
{
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rb_strlcat(buf, " ", sizeof buf);
rb_strlcat(buf, parv[i], sizeof buf);
}
report_operspy(source_p, "SCAN", buf);
}
}
else
{
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "oper_spy");
return -1;
}
}
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RB_DLINK_FOREACH(tn, target_list->head)
{
unsigned int working_umodes = 0;
char maskbuf[BUFSIZE];
target_p = tn->data;
if (!IsClient(target_p))
continue;
if(EmptyString(target_p->sockhost))
sockhost = empty_sockhost;
else if(!show_ip(source_p, target_p))
sockhost = spoofed_sockhost;
else
sockhost = target_p->sockhost;
working_umodes = target_p->umodes;
/* require that we have the allowed umodes... */
if ((working_umodes & allowed_umodes) != allowed_umodes)
continue;
/* require that we have NONE of the disallowed ones */
if ((working_umodes & disallowed_umodes) != 0)
continue;
if (mask != NULL)
{
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rb_snprintf(maskbuf, BUFSIZE, "%s!%s@%s",
target_p->name, target_p->username, target_p->host);
if (!match(mask, maskbuf))
continue;
}
if (list_users && (!list_max || (list_count < list_max)))
{
char modebuf[BUFSIZE];
char *m = modebuf;
*m++ = '+';
for (i = 0; i < 128; i++)
{
if (target_p->umodes & user_modes[i])
*m++ = (char) i;
}
*m++ = '\0';
list_count++;
sendto_one_numeric(source_p, RPL_SCANUMODES,
form_str(RPL_SCANUMODES),
target_p->name, target_p->username,
target_p->host, sockhost,
target_p->servptr->name, modebuf,
target_p->info);
}
count++;
}
sendto_one_numeric(source_p, RPL_SCANMATCHED,
form_str(RPL_SCANMATCHED), count);
return 0;
}