281 lines
6.9 KiB
C
281 lines
6.9 KiB
C
/*
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* charybdis: an advanced Internet Relay Chat Daemon(ircd).
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* m_scan.c: Provides information about various targets on various topics
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*
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* Copyright (c) 2006 William Pitcock <nenolod -at- nenolod.net>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1.Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2.Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3.The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: m_scan.c 1853 2006-08-24 18:30:52Z jilles $
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*/
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#include "stdinc.h"
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#include "class.h"
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#include "hook.h"
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#include "client.h"
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#include "hash.h"
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#include "common.h"
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#include "hash.h"
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#include "match.h"
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#include "ircd.h"
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#include "numeric.h"
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#include "s_serv.h"
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#include "s_conf.h"
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#include "s_newconf.h"
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#include "s_user.h"
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#include "send.h"
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#include "msg.h"
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#include "parse.h"
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#include "modules.h"
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static int mo_scan(struct Client *, struct Client *, int, const char **);
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static int scan_umodes(struct Client *, struct Client *, int, const char **);
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/*static int scan_cmodes(struct Client *, struct Client *, int, const char **);*/
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struct Message scan_msgtab = {
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"SCAN", 0, 0, 0, MFLG_SLOW,
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{mg_ignore, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_scan, 2}}
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};
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mapi_clist_av1 scan_clist[] = { &scan_msgtab, NULL };
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DECLARE_MODULE_AV1(scan, NULL, NULL, scan_clist, NULL, NULL, "$Revision: 1853 $");
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typedef int (*scan_handler)(struct Client *, struct Client *, int,
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const char **);
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struct scan_cmd {
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const char *name;
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int operlevel;
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scan_handler handler;
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} scan_cmds[] = {
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{"UMODES", L_OPER, scan_umodes},
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{NULL, 0, NULL}
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};
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static const char *empty_sockhost = "255.255.255.255";
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static const char *spoofed_sockhost = "0";
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/*
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* m_scan
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* parv[0] = sender prefix
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* parv[1] = options [or target]
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* parv[2] = [target]
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*/
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static int
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mo_scan(struct Client *client_p, struct Client *source_p, int parc,
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const char *parv[])
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{
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struct scan_cmd *sptr;
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for (sptr = scan_cmds; sptr->name != NULL; sptr++)
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{
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if (!irccmp(sptr->name, parv[1]))
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{
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if (sptr->operlevel == L_ADMIN &&
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!IsOperAdmin(source_p))
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return -1;
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else
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return sptr->handler(client_p, source_p, parc, parv);
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}
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}
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sendto_one_notice(source_p, ":*** %s is not an implemented SCAN target",
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parv[1]);
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return 0;
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}
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static int
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scan_umodes(struct Client *client_p, struct Client *source_p, int parc,
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const char *parv[])
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{
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unsigned int allowed_umodes = 0, disallowed_umodes = 0;
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int what = MODE_ADD;
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int mode;
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int list_users = YES;
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int list_max = 0;
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int list_count = 0, count = 0;
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const char *mask = NULL;
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const char *c;
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struct Client *target_p;
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rb_dlink_list *target_list = &lclient_list; /* local clients only by default */
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rb_dlink_node *tn;
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int i;
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const char *sockhost;
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char buf[512];
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if (parc < 3)
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{
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if (MyClient(source_p))
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sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
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me.name, source_p->name, "SCAN UMODES");
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return -1;
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}
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if (parv[2][0] != '+' && parv[2][0] != '-')
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{
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sendto_one_notice(source_p, ":SCAN UMODES: umodes parameter must start with '+' or '-'");
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return -1;
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}
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for (c = parv[2]; *c; c++)
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{
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switch(*c)
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{
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case '+':
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what = MODE_ADD;
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break;
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case '-':
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what = MODE_DEL;
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break;
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default:
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if ((mode = user_modes[(unsigned char) *c]) != 0)
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{
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if (what == MODE_ADD)
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allowed_umodes |= mode;
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else
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disallowed_umodes |= mode;
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}
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}
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}
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for (i = 3; i < parc; i++)
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{
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if (!irccmp(parv[i], "no-list"))
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list_users = NO;
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else if (!irccmp(parv[i], "list"))
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list_users = YES;
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else if (!irccmp(parv[i], "global"))
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target_list = &global_client_list;
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else if (i < (parc - 1))
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{
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if (!irccmp(parv[i], "list-max"))
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list_max = atoi(parv[++i]);
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else if (!irccmp(parv[i], "mask"))
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mask = parv[++i];
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else
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{
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sendto_one_notice(source_p, ":SCAN UMODES: invalid parameters");
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return -1;
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}
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}
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else
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{
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sendto_one_notice(source_p, ":SCAN UMODES: invalid parameters");
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return -1;
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}
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}
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if (target_list == &global_client_list && list_users)
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{
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if (IsOperSpy(source_p))
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{
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if (!ConfigFileEntry.operspy_dont_care_user_info)
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{
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rb_strlcpy(buf, "UMODES", sizeof buf);
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for (i = 2; i < parc; i++)
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{
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rb_strlcat(buf, " ", sizeof buf);
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rb_strlcat(buf, parv[i], sizeof buf);
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}
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report_operspy(source_p, "SCAN", buf);
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}
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}
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else
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{
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sendto_one(source_p, form_str(ERR_NOPRIVS),
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me.name, source_p->name, "oper_spy");
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return -1;
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}
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}
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RB_DLINK_FOREACH(tn, target_list->head)
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{
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unsigned int working_umodes = 0;
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char maskbuf[BUFSIZE];
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target_p = tn->data;
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if (!IsClient(target_p))
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continue;
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if(EmptyString(target_p->sockhost))
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sockhost = empty_sockhost;
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else if(!show_ip(source_p, target_p))
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sockhost = spoofed_sockhost;
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else
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sockhost = target_p->sockhost;
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working_umodes = target_p->umodes;
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/* require that we have the allowed umodes... */
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if ((working_umodes & allowed_umodes) != allowed_umodes)
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continue;
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/* require that we have NONE of the disallowed ones */
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if ((working_umodes & disallowed_umodes) != 0)
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continue;
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if (mask != NULL)
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{
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rb_snprintf(maskbuf, BUFSIZE, "%s!%s@%s",
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target_p->name, target_p->username, target_p->host);
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if (!match(mask, maskbuf))
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continue;
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}
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if (list_users && (!list_max || (list_count < list_max)))
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{
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char modebuf[BUFSIZE];
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char *m = modebuf;
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*m++ = '+';
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for (i = 0; i < 128; i++)
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{
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if (target_p->umodes & user_modes[i])
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*m++ = (char) i;
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}
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*m++ = '\0';
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list_count++;
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sendto_one_numeric(source_p, RPL_SCANUMODES,
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form_str(RPL_SCANUMODES),
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target_p->name, target_p->username,
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target_p->host, sockhost,
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target_p->servptr->name, modebuf,
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target_p->info);
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}
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count++;
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}
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sendto_one_numeric(source_p, RPL_SCANMATCHED,
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form_str(RPL_SCANMATCHED), count);
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return 0;
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}
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