443 lines
12 KiB
C
443 lines
12 KiB
C
/* modules/m_signon.c
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* Copyright (C) 2006 Michael Tharp <gxti@partiallystapled.com>
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* Copyright (C) 2006 charybdis development team
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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_signon.c 1192 2006-04-21 16:21:02Z jilles $
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*/
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#include "stdinc.h"
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#include "send.h"
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#include "channel.h"
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#include "client.h"
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#include "common.h"
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#include "config.h"
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#include "ircd.h"
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#include "numeric.h"
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#include "s_conf.h"
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#include "s_serv.h"
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#include "hash.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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#include "sprintf_irc.h"
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#include "whowas.h"
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#include "monitor.h"
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#include "s_stats.h"
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#include "snomask.h"
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#include "irc_string.h"
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#include "s_user.h"
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static int me_svslogin(struct Client *, struct Client *, int, const char **);
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static int ms_signon(struct Client *, struct Client *, int, const char **);
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static void send_signon(struct Client *, struct Client *, const char *, const char *, const char *, unsigned int, const char *);
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struct Message svslogin_msgtab = {
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"SVSLOGIN", 0, 0, 0, MFLG_SLOW,
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{mg_ignore, mg_ignore, mg_ignore, mg_ignore, {me_svslogin, 6}, mg_ignore}
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};
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struct Message signon_msgtab = {
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"SIGNON", 0, 0, 0, MFLG_SLOW,
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{mg_ignore, mg_ignore, {ms_signon, 6}, mg_ignore, mg_ignore, mg_ignore}
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};
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mapi_clist_av1 signon_clist[] = {
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&svslogin_msgtab, &signon_msgtab, NULL
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};
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DECLARE_MODULE_AV1(signon, NULL, NULL, signon_clist, NULL, NULL, "$Revision: 1192 $");
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#define NICK_VALID 1
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#define USER_VALID 2
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#define HOST_VALID 4
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static int
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clean_nick(const char *nick)
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{
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int len = 0;
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if(*nick == '-')
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return 0;
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/* This is used to check logins, which are often
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* numeric. Don't check for leading digits, if
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* services wants to set someone's nick to something
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* starting with a number, let it try.
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* --gxti
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*/
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for (; *nick; nick++)
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{
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len++;
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if(!IsNickChar(*nick))
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return 0;
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}
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/* nicklen is +1 */
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if(len >= NICKLEN)
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return 0;
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return 1;
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}
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static int
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clean_username(const char *username)
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{
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int len = 0;
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for (; *username; username++)
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{
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len++;
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if(!IsUserChar(*username))
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return 0;
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}
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if(len > USERLEN)
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return 0;
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return 1;
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}
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static int
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clean_host(const char *host)
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{
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int len = 0;
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for (; *host; host++)
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{
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len++;
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if(!IsHostChar(*host))
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return 0;
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}
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if(len > HOSTLEN)
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return 0;
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return 1;
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}
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static int
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me_svslogin(struct Client *client_p, struct Client *source_p,
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int parc, const char *parv[])
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{
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struct Client *target_p, *exist_p;
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char nick[NICKLEN+1], login[NICKLEN+1];
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char user[USERLEN+1], host[HOSTLEN+1];
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int valid = 0;
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if(!(source_p->flags & FLAGS_SERVICE))
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return 0;
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if((target_p = find_client(parv[1])) == NULL)
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return 0;
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if(!MyClient(target_p) && !IsUnknown(target_p))
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return 0;
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if(clean_nick(parv[2]))
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{
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rb_strlcpy(nick, parv[2], NICKLEN + 1);
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valid |= NICK_VALID;
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}
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else if(*target_p->name)
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rb_strlcpy(nick, target_p->name, NICKLEN + 1);
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else
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strcpy(nick, "*");
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if(clean_username(parv[3]))
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{
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rb_strlcpy(user, parv[3], USERLEN + 1);
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valid |= USER_VALID;
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}
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else
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rb_strlcpy(user, target_p->username, USERLEN + 1);
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if(clean_host(parv[4]))
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{
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rb_strlcpy(host, parv[4], HOSTLEN + 1);
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valid |= HOST_VALID;
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}
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else
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rb_strlcpy(host, target_p->host, HOSTLEN + 1);
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if(*parv[5] == '*')
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{
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if(target_p->user)
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rb_strlcpy(login, target_p->user->suser, NICKLEN + 1);
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else
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login[0] = '\0';
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}
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else if(!strcmp(parv[5], "0"))
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login[0] = '\0';
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else
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rb_strlcpy(login, parv[5], NICKLEN + 1);
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/* Login (mostly) follows nick rules. */
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if(*login && !clean_nick(login))
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return 0;
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if((exist_p = find_person(nick)) && target_p != exist_p)
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{
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char buf[BUFSIZE];
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if(MyClient(exist_p))
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sendto_one(exist_p, ":%s KILL %s :(Nickname regained by services)",
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me.name, exist_p->name);
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exist_p->flags |= FLAGS_KILLED;
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kill_client_serv_butone(NULL, exist_p, "%s (Nickname regained by services)",
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me.name);
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snprintf(buf, sizeof(buf), "Killed (%s (Nickname regained by services))",
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me.name);
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exit_client(NULL, exist_p, &me, buf);
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}else if((exist_p = find_client(nick)) && IsUnknown(exist_p) && exist_p != target_p) {
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exit_client(NULL, exist_p, &me, "Overridden");
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}
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if(*login)
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{
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/* Strip leading digits, unless it's purely numeric. */
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const char *p = login;
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while(IsDigit(*p))
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p++;
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if(!*p)
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p = login;
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sendto_one(target_p, form_str(RPL_LOGGEDIN), me.name, EmptyString(target_p->name) ? "*" : target_p->name,
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nick, user, host, p, p);
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}
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else
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sendto_one(target_p, form_str(RPL_LOGGEDOUT), me.name, EmptyString(target_p->name) ? "*" : target_p->name,
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nick, user, host);
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if(IsUnknown(target_p))
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{
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struct User *user_p = make_user(target_p);
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if(valid & NICK_VALID)
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strcpy(target_p->preClient->spoofnick, nick);
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if(valid & USER_VALID)
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strcpy(target_p->preClient->spoofuser, user);
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if(valid & HOST_VALID)
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strcpy(target_p->preClient->spoofhost, host);
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rb_strlcpy(user_p->suser, login, NICKLEN + 1);
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}
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else
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{
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char note[NICKLEN + 10];
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send_signon(NULL, target_p, nick, user, host, rb_current_time(), login);
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rb_snprintf(note, NICKLEN + 10, "Nick: %s", target_p->name);
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rb_note(target_p->localClient->F, note);
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}
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return 0;
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}
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static int
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ms_signon(struct Client *client_p, struct Client *source_p,
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int parc, const char *parv[])
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{
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struct Client *target_p;
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int newts, sameuser;
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char login[NICKLEN+1];
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if(!clean_nick(parv[1]))
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{
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ServerStats.is_kill++;
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sendto_realops_snomask(SNO_DEBUG, L_ALL,
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"Bad Nick from SIGNON: %s From: %s(via %s)",
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parv[1], source_p->servptr->name, client_p->name);
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/* if source_p has an id, kill_client_serv_butone() will
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* send a kill to client_p, otherwise do it here */
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if (!has_id(source_p))
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sendto_one(client_p, ":%s KILL %s :%s (Bad nickname from SIGNON)",
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get_id(&me, client_p), parv[1], me.name);
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kill_client_serv_butone(client_p, source_p, "%s (Bad nickname from SIGNON)",
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me.name);
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source_p->flags |= FLAGS_KILLED;
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exit_client(NULL, source_p, &me, "Bad nickname from SIGNON");
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return 0;
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}
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if(!clean_username(parv[2]) || !clean_host(parv[3]))
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{
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ServerStats.is_kill++;
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sendto_realops_snomask(SNO_DEBUG, L_ALL,
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"Bad user@host from SIGNON: %s@%s From: %s(via %s)",
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parv[2], parv[3], source_p->servptr->name, client_p->name);
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/* if source_p has an id, kill_client_serv_butone() will
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* send a kill to client_p, otherwise do it here */
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if (!has_id(source_p))
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sendto_one(client_p, ":%s KILL %s :%s (Bad user@host from SIGNON)",
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get_id(&me, client_p), parv[1], me.name);
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kill_client_serv_butone(client_p, source_p, "%s (Bad user@host from SIGNON)",
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me.name);
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source_p->flags |= FLAGS_KILLED;
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exit_client(NULL, source_p, &me, "Bad user@host from SIGNON");
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return 0;
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}
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newts = atol(parv[4]);
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if(!strcmp(parv[5], "0"))
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login[0] = '\0';
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else if(*parv[5] != '*')
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{
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if (clean_nick(parv[5]))
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rb_strlcpy(login, parv[5], NICKLEN + 1);
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else
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return 0;
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}
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target_p = find_named_client(parv[1]);
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if(target_p != NULL && target_p != source_p)
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{
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/* In case of collision, follow NICK rules. */
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/* XXX this is duplicated code and does not do SAVE */
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if(IsUnknown(target_p))
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exit_client(NULL, target_p, &me, "Overridden");
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else
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{
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if(!newts || !target_p->tsinfo || (newts == target_p->tsinfo) || !source_p->user)
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{
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Nick change collision from SIGNON from %s to %s(%s <- %s)(both killed)",
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source_p->name, target_p->name, target_p->from->name,
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client_p->name);
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ServerStats.is_kill++;
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sendto_one_numeric(target_p, ERR_NICKCOLLISION,
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form_str(ERR_NICKCOLLISION), target_p->name);
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kill_client_serv_butone(NULL, source_p, "%s (Nick change collision)", me.name);
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ServerStats.is_kill++;
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kill_client_serv_butone(NULL, target_p, "%s (Nick change collision)", me.name);
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target_p->flags |= FLAGS_KILLED;
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exit_client(NULL, target_p, &me, "Nick collision(new)");
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source_p->flags |= FLAGS_KILLED;
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exit_client(client_p, source_p, &me, "Nick collision(old)");
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return 0;
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}
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else
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{
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sameuser = !irccmp(target_p->username, source_p->username) &&
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!irccmp(target_p->host, source_p->host);
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if((sameuser && newts < target_p->tsinfo) ||
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(!sameuser && newts > target_p->tsinfo))
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{
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if(sameuser)
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Nick change collision from SIGNON from %s to %s(%s <- %s)(older killed)",
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source_p->name, target_p->name,
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target_p->from->name, client_p->name);
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else
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Nick change collision from SIGNON from %s to %s(%s <- %s)(newer killed)",
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source_p->name, target_p->name,
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target_p->from->name, client_p->name);
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ServerStats.is_kill++;
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sendto_one_numeric(target_p, ERR_NICKCOLLISION,
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form_str(ERR_NICKCOLLISION), target_p->name);
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/* kill the client issuing the nickchange */
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kill_client_serv_butone(client_p, source_p,
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"%s (Nick change collision)", me.name);
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source_p->flags |= FLAGS_KILLED;
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if(sameuser)
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exit_client(client_p, source_p, &me, "Nick collision(old)");
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else
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exit_client(client_p, source_p, &me, "Nick collision(new)");
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return 0;
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}
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else
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{
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if(sameuser)
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Nick collision from SIGNON on %s(%s <- %s)(older killed)",
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target_p->name, target_p->from->name,
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client_p->name);
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else
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Nick collision from SIGNON on %s(%s <- %s)(newer killed)",
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target_p->name, target_p->from->name,
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client_p->name);
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sendto_one_numeric(target_p, ERR_NICKCOLLISION,
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form_str(ERR_NICKCOLLISION), target_p->name);
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/* kill the client who existed before hand */
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kill_client_serv_butone(client_p, target_p,
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"%s (Nick collision)", me.name);
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ServerStats.is_kill++;
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target_p->flags |= FLAGS_KILLED;
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(void) exit_client(client_p, target_p, &me, "Nick collision");
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}
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}
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}
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}
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send_signon(client_p, source_p, parv[1], parv[2], parv[3], newts, login);
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return 0;
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}
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static void
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send_signon(struct Client *client_p, struct Client *target_p,
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const char *nick, const char *user, const char *host,
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unsigned int newts, const char *login)
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{
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sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s SIGNON %s %s %s %ld %s",
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use_id(target_p), nick, user, host,
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(long) target_p->tsinfo, *login ? login : "0");
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sendto_server(client_p, NULL, NOCAPS, CAP_TS6, ":%s SIGNON %s %s %s %ld %s",
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target_p->name, nick, user, host,
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(long) target_p->tsinfo, *login ? login : "0");
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strcpy(target_p->user->suser, login);
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change_nick_user_host(target_p, nick, user, host, newts, "Signing %s (%s)", *login ? "in" : "out", nick);
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}
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