src/event_neonspam_join.c

   1 /* event_neonspam_join.c - NeonServ v5.1
   2  * Copyright (C) 2011  Philipp Kreil (pk910)
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 static USERAUTH_CALLBACK(neonspam_event_join_nick_lookup);
  19 static void neonspam_event_join_punish(struct ClientSocket *client, struct ChanUser *chanuser, struct NeonSpamSettings *settings, int action, char *reason, char *reaction);
  20 static int neonspam_joinfloodscan(struct NeonSpamSettings *settings, struct ChanUser *chanuser);
  21
  22 struct neonspam_event_join_cache {
  23     struct ClientSocket *client;
  24     struct ChanUser *chanuser;
  25     struct NeonSpamSettings *settings;
  26     int action;
  27     char *reason;
  28     char *reaction;
  29 };
  30
  31 static void neonspam_event_join(struct ChanUser *chanuser) {
  32     struct ClientSocket *client = getChannelBot(chanuser->chan, BOTID);
  33     if(!client) return; //we can't "see" this event
  34     loadNeonSpamSettings(chanuser->chan);
  35     struct NeonSpamSettings *settings = chanuser->chan->spam_settings;
  36     if(!settings) return;
  37     if(settings->exceptlevel == 0) return;
  38     //scan the message
  39     int result = 0;
  40     int action = SPAMSERV_CHECK_IGNORE;
  41     char reason[MAXLEN];
  42     char *reaction = NULL;
  43     if(action != SPAMSERV_CHECK_PUNISH && (settings->flags & SPAMSETTINGS_JOINSCAN)) {
  44         result = neonspam_joinfloodscan(settings, chanuser);
  45         switch(result) {
  46             case SPAMSERV_CHECK_IGNORE:
  47                 break;
  48             case SPAMSERV_CHECK_WARN:
  49                 if(action == SPAMSERV_CHECK_IGNORE) {
  50                     action = result;
  51                     sprintf(reason, SPAMSERV_MSG_WARNING, SPAMSERV_MSG_JOINFLOOD);
  52                 }
  53                 break;
  54             case SPAMSERV_CHECK_PUNISH:
  55                 if(action != SPAMSERV_CHECK_PUNISH) {
  56                     action = result;
  57                     sprintf(reason, SPAMSERV_MSG_WARNING, SPAMSERV_MSG_JOINFLOOD);
  58                     reaction = "channel_joinreaction";
  59                 }
  60                 break;
  61         }
  62     }
  63     //some other checks?
  64     if(action != SPAMSERV_CHECK_IGNORE) {
  65         //whois the user to check against exceptlevel
  66         if((chanuser->user->flags & USERFLAG_ISAUTHED) || settings->exceptlevel == 501) {
  67             neonspam_event_join_punish(client, chanuser, settings, action, reason, reaction);
  68         } else {
  69             struct neonspam_event_join_cache *cache = malloc(sizeof(*cache));
  70             if (!cache) {
  71                 perror("malloc() failed");
  72                 return;
  73             }
  74             cache->client = client;
  75             cache->chanuser = chanuser;
  76             cache->settings = settings;
  77             cache->action = action;
  78             cache->reason = strdup(reason);
  79             cache->reaction = reaction;
  80             get_userauth(chanuser->user, neonspam_event_join_nick_lookup, cache);
  81         }
  82
  83     }
  84 }
  85
  86 static USERAUTH_CALLBACK(neonspam_event_join_nick_lookup) {
  87     struct neonspam_event_join_cache *cache = data;
  88     neonspam_event_join_punish(cache->client, cache->chanuser, cache->settings, cache->action, cache->reason, cache->reaction);
  89     free(cache->reason);
  90     free(cache);
  91 }
  92
  93 static void neonspam_event_join_punish(struct ClientSocket *client, struct ChanUser *chanuser, struct NeonSpamSettings *settings, int action, char *reason, char *reaction) {
  94     int uaccess = 0;
  95     if(chanuser->user->flags & USERFLAG_ISAUTHED)
  96         uaccess = getChannelAccess(chanuser->user, chanuser->chan, 0);
  97     if(uaccess >= settings->exceptlevel) return;
  98     //scanops / scanvoiced
  99     MYSQL_RES *res;
 100     MYSQL_ROW row, defaults = NULL;
 101     loadChannelSettings(chanuser->chan);
 102     printf_mysql_query("SELECT `%s`, `channel_getop`, `channel_getvoice` FROM `channels` WHERE `channel_id` = '%d'", reaction, chanuser->chan->channel_id);
 103     res = mysql_use();
 104     row = mysql_fetch_row(res);
 105     if(!row[0] || !row[1] || !row[2]) {
 106         printf_mysql_query("SELECT `%s`, `channel_getop`, `channel_getvoice` FROM `channels` WHERE `channel_name` = 'defaults'", reaction);
 107         res = mysql_use();
 108         defaults = mysql_fetch_row(res);
 109     }
 110     if(!(settings->flags & SPAMSETTINGS_SCANOPS) && uaccess >= atoi((row[1] ? row[1] : defaults[1]))) return;
 111     if(!(settings->flags & SPAMSETTINGS_SCANVOICE) && uaccess >= atoi((row[2] ? row[2] : defaults[2]))) return;
 112     if(action == SPAMSERV_CHECK_WARN) {
 113         reply(client, chanuser->user, "%s", reason);
 114     } else if(action == SPAMSERV_CHECK_PUNISH) {
 115         int duration = 0;
 116         char banmaskBuf[NICKLEN+USERLEN+HOSTLEN+3];
 117         char *banmask = NULL;
 118         switch (atoi((row[0] ? row[0] : defaults[0]))) {
 119             case 2: //TIMEBAN: 3min
 120                 duration = 180;
 121             case 3: //TIMEBAN: 1h
 122                 if(!duration)
 123                     duration = 3600;
 124                 banmask = generate_banmask(chanuser->user, banmaskBuf);
 125                 printf_mysql_query("INSERT INTO `bans` (`ban_channel`, `ban_mask`, `ban_triggered`, `ban_timeout`, `ban_owner`, `ban_reason`) VALUES ('%d', '%s', UNIX_TIMESTAMP(), '%lu', '%d', '%s')", chanuser->chan->channel_id, escape_string(banmask), (unsigned long) (time(0) + duration), 0, escape_string(reason));
 126                 int banid = (int) mysql_insert_id(mysql_conn);
 127                 char nameBuf[MAXLEN];
 128                 char banidBuf[20];
 129                 sprintf(nameBuf, "ban_%d", banid);
 130                 sprintf(banidBuf, "%d", banid);
 131                 timeq_add_name(nameBuf, duration, channel_ban_timeout, strdup(banidBuf));
 132             case 1: //KICKBAN
 133                 if(!banmask)
 134                     banmask = generate_banmask(chanuser->user, banmaskBuf);
 135                 putsock(client, "MODE %s +b %s", chanuser->chan->name, banmask);
 136             case 0: //KICK
 137                 putsock(client, "KICK %s %s :%s", chanuser->chan->name, chanuser->user->nick, reason);
 138                 break;
 139         }
 140     }
 141 }
 142
 143 static int neonspam_update_join_penalty(struct NeonSpamSettings *settings, struct NeonSpamJoinNode *joinnode, int addjoin) {
 144     int last_update = time(0) - joinnode->last_penalty_update;
 145     if(last_update) {
 146         if(last_update < MAX_JOIN_TIME && joinnode->joinpenalty) {
 147             joinnode->joinpenalty -= last_update * (MAX_JOIN_TIME / settings->join_time);
 148             if(joinnode->joinpenalty < 0)
 149                 joinnode->joinpenalty = 0;
 150         } else
 151             joinnode->joinpenalty = 0;
 152         joinnode->last_penalty_update = time(0);
 153     }
 154     joinnode->joinpenalty += MAX_JOIN_TIME * addjoin;
 155     return joinnode->joinpenalty / MAX_JOIN_TIME + ((joinnode->joinpenalty % MAX_JOIN_TIME) ? 1 : 0);
 156 }
 157
 158 static int neonspam_joinfloodscan(struct NeonSpamSettings *settings, struct ChanUser *chanuser) {
 159     if(!chanuser->spamnode)
 160         createSpamNode(chanuser);
 161     int joins_pending = neonspam_update_join_penalty(settings, getNeonSpamJoinNode(chanuser), 1);
 162     if(joins_pending == settings->join_amount)
 163         return SPAMSERV_CHECK_WARN;
 164     else if(joins_pending > settings->join_amount)
 165         return SPAMSERV_CHECK_PUNISH;
 166     else
 167         return SPAMSERV_CHECK_IGNORE;
 168 }
 169
 170