Move to ratbox3 reject and throttle code.
Throttle replaces max_unknown_ip, reject is like before
(including the charybdis-specific unkline handling).
Both of these now apply before SSL negotiation.
This commit does not include the global_cidr and new dline code.
m_webirc is a bit nasty with throttling (unlike before
with max_unknown_ip), this may be fixed later (or
the webirc IP needs to be exempt{}ed).
This commit is contained in:
Jilles Tjoelker
parent
70747af524
commit
d1275a8fd6
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@ -1153,10 +1153,14 @@ general {
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/* reject duration: the amount of time to cache the rejection */
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reject_duration = 5 minutes;
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/* max_unknown_ip: maximum number of pending connections to the server
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* that are allowed per IP address
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/* throttle_duration: Amount of time that throttling will be applied to an IP
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* address.
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*/
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max_unknown_ip = 2;
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throttle_duration = 60;
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/* throttle_count: Number of connections within throttle_duration that it takes
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* for throttling to take effect */
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throttle_count = 4;
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};
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modules {
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@ -125,7 +125,6 @@ mr_webirc(struct Client *client_p, struct Client *source_p, int parc, const char
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else
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rb_strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host));
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del_unknown_ip(source_p);
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rb_inet_pton_sock(parv[4], (struct sockaddr *)&source_p->localClient->ip);
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/* Check dlines now, klines will be checked on registration */
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@ -3,7 +3,7 @@
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* reject.h: header to a file which rejects users with prejudice
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*
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* Copyright (C) 2003 Aaron Sethman <androsyn@ratbox.org>
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* Copyright (C) 2003-2004 ircd-ratbox development team
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* Copyright (C) 2003-2005 ircd-ratbox development team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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@ -17,11 +17,11 @@
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*
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*
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* $Id: reject.h 3446 2007-05-14 22:21:16Z jilles $
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* $Id: reject.h 25056 2008-02-06 20:47:40Z androsyn $
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*/
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#ifndef INCLUDED_reject_h
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#define INCLUDED_reject_h
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@ -29,17 +29,16 @@
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/* amount of time to delay a rejected clients exit */
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#define DELAYED_EXIT_TIME 10
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extern rb_dlink_list delay_exit;
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void init_reject(void);
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int check_reject(struct Client *);
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int check_reject(rb_fde_t *F, struct sockaddr *addr);
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void add_reject(struct Client *, const char *mask1, const char *mask2);
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void flush_reject(void);
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int remove_reject_ip(const char *ip);
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int remove_reject_mask(const char *mask1, const char *mask2);
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unsigned long delay_exit_length(void);
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int throttle_add(struct sockaddr *addr);
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int add_unknown_ip(struct Client *client_p);
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void del_unknown_ip(struct Client *client_p);
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#endif
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@ -210,12 +210,13 @@ struct config_file_entry
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int reject_ban_time;
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int reject_after_count;
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int reject_duration;
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int throttle_count;
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int throttle_duration;
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int target_change;
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int collision_fnc;
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int default_umodes;
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int global_snotices;
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int operspy_dont_care_user_info;
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int max_unknown_ip;
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};
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struct config_channel_entry
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@ -446,6 +446,18 @@ static struct InfoStruct info_table[] = {
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&ConfigFileEntry.stats_y_oper_only,
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"STATS Y is only shown to operators",
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},
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{
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"throttle_count",
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OUTPUT_DECIMAL,
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&ConfigFileEntry.throttle_count,
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"Connection throttle threshold",
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},
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{
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"throttle_duration",
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OUTPUT_DECIMAL,
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&ConfigFileEntry.throttle_duration,
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"Connection throttle duration",
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},
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{
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"tkline_expire_notices",
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OUTPUT_BOOLEAN,
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@ -875,7 +875,7 @@ stats_tstats (struct Client *source_p)
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"T :accepts %u refused %u", sp.is_ac, sp.is_ref);
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sendto_one_numeric(source_p, RPL_STATSDEBUG,
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"T :rejected %u delaying %lu",
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sp.is_rej, rb_dlink_list_length(&delay_exit));
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sp.is_rej, delay_exit_length());
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sendto_one_numeric(source_p, RPL_STATSDEBUG,
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"T :nicks being delayed %lu",
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get_nd_count());
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@ -1280,7 +1280,6 @@ exit_unknown_client(struct Client *client_p, struct Client *source_p, struct Cli
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delete_resolver_queries(source_p->localClient->dnsquery);
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rb_free(source_p->localClient->dnsquery);
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}
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del_unknown_ip(source_p);
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rb_dlinkDelete(&source_p->localClient->tnode, &unknown_list);
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if(!IsIOError(source_p))
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@ -438,7 +438,6 @@ static void
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add_connection(struct Listener *listener, rb_fde_t *F, struct sockaddr *sai, void *ssl_ctl)
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{
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struct Client *new_client;
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struct ConfItem *aconf;
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s_assert(NULL != listener);
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/*
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@ -468,19 +467,11 @@ add_connection(struct Listener *listener, rb_fde_t *F, struct sockaddr *sai, voi
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++listener->ref_count;
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/* XXX these should be done in accept_precallback */
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aconf = find_dline(sai, sai->sa_family);
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if(aconf == NULL || aconf->status & CONF_EXEMPTDLINE)
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{
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if(check_reject(new_client))
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return;
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if(add_unknown_ip(new_client))
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return;
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}
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start_auth(new_client);
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}
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static const char *toofast = "ERROR :Reconnecting too fast, throttled.\r\n";
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static int
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accept_precallback(rb_fde_t *F, struct sockaddr *addr, rb_socklen_t addrlen, void *data)
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{
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@ -542,6 +533,16 @@ accept_precallback(rb_fde_t *F, struct sockaddr *addr, rb_socklen_t addrlen, voi
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return 0;
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}
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if(check_reject(F, addr))
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return 0;
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if(throttle_add(addr))
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{
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rb_write(F, toofast, strlen(toofast));
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rb_close(F);
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return 0;
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}
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return 1;
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}
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@ -2064,7 +2064,6 @@ static struct ConfEntry conf_general_table[] =
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{ "max_nick_time", CF_TIME, NULL, 0, &ConfigFileEntry.max_nick_time },
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{ "max_nick_changes", CF_INT, NULL, 0, &ConfigFileEntry.max_nick_changes },
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{ "max_targets", CF_INT, NULL, 0, &ConfigFileEntry.max_targets },
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{ "max_unknown_ip", CF_INT, NULL, 0, &ConfigFileEntry.max_unknown_ip },
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{ "min_nonwildcard", CF_INT, NULL, 0, &ConfigFileEntry.min_nonwildcard },
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{ "nick_delay", CF_TIME, NULL, 0, &ConfigFileEntry.nick_delay },
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{ "no_oper_flood", CF_YESNO, NULL, 0, &ConfigFileEntry.no_oper_flood },
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@ -2076,6 +2075,8 @@ static struct ConfEntry conf_general_table[] =
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{ "reject_after_count", CF_INT, NULL, 0, &ConfigFileEntry.reject_after_count },
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{ "reject_ban_time", CF_TIME, NULL, 0, &ConfigFileEntry.reject_ban_time },
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{ "reject_duration", CF_TIME, NULL, 0, &ConfigFileEntry.reject_duration },
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{ "throttle_count", CF_INT, NULL, 0, &ConfigFileEntry.throttle_count },
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{ "throttle_duration", CF_TIME, NULL, 0, &ConfigFileEntry.throttle_duration },
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{ "short_motd", CF_YESNO, NULL, 0, &ConfigFileEntry.short_motd },
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{ "stats_c_oper_only", CF_YESNO, NULL, 0, &ConfigFileEntry.stats_c_oper_only },
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{ "stats_e_disabled", CF_YESNO, NULL, 0, &ConfigFileEntry.stats_e_disabled },
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195
src/reject.c
195
src/reject.c
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@ -17,70 +17,79 @@
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*
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* $Id: reject.c 3456 2007-05-18 19:14:18Z jilles $
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* $Id: reject.c 25119 2008-03-13 16:57:05Z androsyn $
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*/
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#include "stdinc.h"
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#include "config.h"
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#include "client.h"
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#include "s_conf.h"
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#include "reject.h"
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#include "s_stats.h"
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#include "msg.h"
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#include "ircd.h"
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#include "send.h"
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#include "numeric.h"
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#include "parse.h"
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#include "hostmask.h"
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#include "match.h"
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#include "hash.h"
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static rb_patricia_tree_t *global_tree;
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static rb_patricia_tree_t *reject_tree;
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rb_dlink_list delay_exit;
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static rb_dlink_list delay_exit;
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static rb_dlink_list reject_list;
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static rb_dlink_list throttle_list;
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static rb_patricia_tree_t *throttle_tree;
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static void throttle_expires(void *unused);
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static rb_patricia_tree_t *unknown_tree;
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struct reject_data
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typedef struct _reject_data
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{
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rb_dlink_node rnode;
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time_t time;
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unsigned int count;
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uint32_t mask_hashv;
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};
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} reject_t;
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typedef struct _delay_data
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{
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rb_dlink_node node;
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rb_fde_t *F;
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} delay_t;
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typedef struct _throttle
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{
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rb_dlink_node node;
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time_t last;
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int count;
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} throttle_t;
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unsigned long
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delay_exit_length(void)
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{
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return rb_dlink_list_length(&delay_exit);
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}
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static void
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reject_exit(void *unused)
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{
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struct Client *client_p;
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rb_dlink_node *ptr, *ptr_next;
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delay_t *ddata;
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static const char *errbuf = "ERROR :Closing Link: (*** Banned (cache))\r\n";
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RB_DLINK_FOREACH_SAFE(ptr, ptr_next, delay_exit.head)
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{
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client_p = ptr->data;
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if(IsDead(client_p))
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continue;
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ddata = ptr->data;
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/* this MUST be here, to prevent the possibility
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* sendto_one() generates a write error, and then a client
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* ends up on the dead_list and the abort_list --fl
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*
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* new disconnect notice stolen from ircu --nenolod
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* no, this only happens when someone's IP has some
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* ban on it and rejects them rather longer than the
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* ircu message suggests --jilles
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*/
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if(!IsIOError(client_p))
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{
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if(IsExUnknown(client_p))
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sendto_one(client_p, "ERROR :Closing Link: %s (*** Too many unknown connections)", client_p->host);
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else
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sendto_one(client_p, "ERROR :Closing Link: %s (*** Banned (cache))", client_p->host);
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}
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close_connection(client_p);
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SetDead(client_p);
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rb_dlinkAddAlloc(client_p, &dead_list);
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rb_write(ddata->F, errbuf, strlen(errbuf));
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rb_close(ddata->F);
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rb_free(ddata);
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}
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delay_exit.head = delay_exit.tail = NULL;
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delay_exit.length = 0;
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delay_exit.head = delay_exit.tail = NULL;
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delay_exit.length = 0;
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}
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static void
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@ -88,7 +97,7 @@ reject_expires(void *unused)
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{
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rb_dlink_node *ptr, *next;
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rb_patricia_node_t *pnode;
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struct reject_data *rdata;
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reject_t *rdata;
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RB_DLINK_FOREACH_SAFE(ptr, next, reject_list.head)
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{
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@ -108,9 +117,10 @@ void
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init_reject(void)
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{
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reject_tree = rb_new_patricia(PATRICIA_BITS);
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unknown_tree = rb_new_patricia(PATRICIA_BITS);
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throttle_tree = rb_new_patricia(PATRICIA_BITS);
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rb_event_add("reject_exit", reject_exit, NULL, DELAYED_EXIT_TIME);
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rb_event_add("reject_expires", reject_expires, NULL, 60);
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rb_event_add("throttle_expires", throttle_expires, NULL, 10);
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}
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@ -118,18 +128,18 @@ void
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add_reject(struct Client *client_p, const char *mask1, const char *mask2)
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{
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rb_patricia_node_t *pnode;
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struct reject_data *rdata;
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reject_t *rdata;
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uint32_t hashv;
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/* Reject is disabled */
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if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_ban_time == 0)
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if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_duration == 0)
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return;
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hashv = 0;
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if (mask1 != NULL)
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hashv ^= fnv_hash_upper(mask1, 32);
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hashv ^= fnv_hash_upper((const unsigned char *)mask1, 32);
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if (mask2 != NULL)
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hashv ^= fnv_hash_upper(mask2, 32);
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hashv ^= fnv_hash_upper((const unsigned char *)mask2, 32);
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if((pnode = rb_match_ip(reject_tree, (struct sockaddr *)&client_p->localClient->ip)) != NULL)
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{
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@ -141,11 +151,11 @@ add_reject(struct Client *client_p, const char *mask1, const char *mask2)
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{
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int bitlen = 32;
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#ifdef RB_IPV6
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if(client_p->localClient->ip.ss_family == AF_INET6)
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if(GET_SS_FAMILY(&client_p->localClient->ip) == AF_INET6)
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bitlen = 128;
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#endif
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pnode = make_and_lookup_ip(reject_tree, (struct sockaddr *)&client_p->localClient->ip, bitlen);
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pnode->data = rdata = rb_malloc(sizeof(struct reject_data));
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pnode->data = rdata = rb_malloc(sizeof(reject_t));
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rb_dlinkAddTail(pnode, &rdata->rnode, &reject_list);
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rdata->time = rb_current_time();
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rdata->count = 1;
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@ -154,29 +164,28 @@ add_reject(struct Client *client_p, const char *mask1, const char *mask2)
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}
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int
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check_reject(struct Client *client_p)
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check_reject(rb_fde_t *F, struct sockaddr *addr)
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{
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rb_patricia_node_t *pnode;
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struct reject_data *rdata;
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reject_t *rdata;
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delay_t *ddata;
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/* Reject is disabled */
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if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_ban_time == 0 ||
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ConfigFileEntry.reject_duration == 0)
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if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_duration == 0)
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return 0;
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pnode = rb_match_ip(reject_tree, (struct sockaddr *)&client_p->localClient->ip);
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pnode = rb_match_ip(reject_tree, addr);
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if(pnode != NULL)
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{
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rdata = pnode->data;
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rdata->time = rb_current_time();
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if(rdata->count > ConfigFileEntry.reject_after_count)
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if(rdata->count > (unsigned long)ConfigFileEntry.reject_after_count)
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{
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ddata = rb_malloc(sizeof(delay_t));
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ServerStats.is_rej++;
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SetReject(client_p);
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rb_setselect(client_p->localClient->F, RB_SELECT_WRITE | RB_SELECT_READ, NULL, NULL);
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SetClosing(client_p);
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rb_dlinkMoveNode(&client_p->localClient->tnode, &unknown_list, &delay_exit);
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rb_setselect(F, RB_SELECT_WRITE | RB_SELECT_READ, NULL, NULL);
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ddata->F = F;
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rb_dlinkAdd(ddata, &ddata->node, &delay_exit);
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return 1;
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}
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}
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@ -189,7 +198,7 @@ flush_reject(void)
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{
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rb_dlink_node *ptr, *next;
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rb_patricia_node_t *pnode;
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struct reject_data *rdata;
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reject_t *rdata;
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RB_DLINK_FOREACH_SAFE(ptr, next, reject_list.head)
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{
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@ -207,13 +216,12 @@ remove_reject_ip(const char *ip)
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rb_patricia_node_t *pnode;
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/* Reject is disabled */
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if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_ban_time == 0 ||
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ConfigFileEntry.reject_duration == 0)
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if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_duration == 0)
|
||||
return -1;
|
||||
|
||||
if((pnode = rb_match_string(reject_tree, ip)) != NULL)
|
||||
{
|
||||
struct reject_data *rdata = pnode->data;
|
||||
reject_t *rdata = pnode->data;
|
||||
rb_dlinkDelete(&rdata->rnode, &reject_list);
|
||||
rb_free(rdata);
|
||||
rb_patricia_remove(reject_tree, pnode);
|
||||
|
|
@ -227,15 +235,15 @@ remove_reject_mask(const char *mask1, const char *mask2)
|
|||
{
|
||||
rb_dlink_node *ptr, *next;
|
||||
rb_patricia_node_t *pnode;
|
||||
struct reject_data *rdata;
|
||||
reject_t *rdata;
|
||||
uint32_t hashv;
|
||||
int n = 0;
|
||||
|
||||
hashv = 0;
|
||||
if (mask1 != NULL)
|
||||
hashv ^= fnv_hash_upper(mask1, 32);
|
||||
hashv ^= fnv_hash_upper((const unsigned char *)mask1, 32);
|
||||
if (mask2 != NULL)
|
||||
hashv ^= fnv_hash_upper(mask2, 32);
|
||||
hashv ^= fnv_hash_upper((const unsigned char *)mask2, 32);
|
||||
RB_DLINK_FOREACH_SAFE(ptr, next, reject_list.head)
|
||||
{
|
||||
pnode = ptr->data;
|
||||
|
|
@ -251,50 +259,57 @@ remove_reject_mask(const char *mask1, const char *mask2)
|
|||
return n;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
add_unknown_ip(struct Client *client_p)
|
||||
throttle_add(struct sockaddr *addr)
|
||||
{
|
||||
throttle_t *t;
|
||||
rb_patricia_node_t *pnode;
|
||||
|
||||
if((pnode = rb_match_ip(unknown_tree, (struct sockaddr *)&client_p->localClient->ip)) == NULL)
|
||||
if((pnode = rb_match_ip(throttle_tree, addr)) != NULL)
|
||||
{
|
||||
t = pnode->data;
|
||||
|
||||
if(t->count > ConfigFileEntry.throttle_count)
|
||||
return 1;
|
||||
|
||||
/* Stop penalizing them after they've been throttled */
|
||||
t->last = rb_current_time();
|
||||
t->count++;
|
||||
|
||||
} else {
|
||||
int bitlen = 32;
|
||||
#ifdef RB_IPV6
|
||||
if(client_p->localClient->ip.ss_family == AF_INET6)
|
||||
if(GET_SS_FAMILY(addr) == AF_INET6)
|
||||
bitlen = 128;
|
||||
#endif
|
||||
pnode = make_and_lookup_ip(unknown_tree, (struct sockaddr *)&client_p->localClient->ip, bitlen);
|
||||
pnode->data = (void *)0;
|
||||
}
|
||||
|
||||
if((unsigned long)pnode->data >= ConfigFileEntry.max_unknown_ip)
|
||||
{
|
||||
SetExUnknown(client_p);
|
||||
SetReject(client_p);
|
||||
rb_setselect(client_p->localClient->F, RB_SELECT_WRITE | RB_SELECT_READ, NULL, NULL);
|
||||
SetClosing(client_p);
|
||||
rb_dlinkMoveNode(&client_p->localClient->tnode, &unknown_list, &delay_exit);
|
||||
return 1;
|
||||
}
|
||||
|
||||
pnode->data = (void *)((unsigned long)pnode->data + 1);
|
||||
|
||||
t = rb_malloc(sizeof(throttle_t));
|
||||
t->last = rb_current_time();
|
||||
t->count = 1;
|
||||
pnode = make_and_lookup_ip(throttle_tree, addr, bitlen);
|
||||
pnode->data = t;
|
||||
rb_dlinkAdd(pnode, &t->node, &throttle_list);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
del_unknown_ip(struct Client *client_p)
|
||||
static void
|
||||
throttle_expires(void *unused)
|
||||
{
|
||||
rb_dlink_node *ptr, *next;
|
||||
rb_patricia_node_t *pnode;
|
||||
|
||||
if((pnode = rb_match_ip(unknown_tree, (struct sockaddr *)&client_p->localClient->ip)) != NULL)
|
||||
throttle_t *t;
|
||||
|
||||
RB_DLINK_FOREACH_SAFE(ptr, next, throttle_list.head)
|
||||
{
|
||||
pnode->data = (void *)((unsigned long)pnode->data - 1);
|
||||
if((unsigned long)pnode->data <= 0)
|
||||
{
|
||||
rb_patricia_remove(unknown_tree, pnode);
|
||||
}
|
||||
pnode = ptr->data;
|
||||
t = pnode->data;
|
||||
|
||||
if(t->last + ConfigFileEntry.throttle_duration > rb_current_time())
|
||||
continue;
|
||||
|
||||
rb_dlinkDelete(ptr, &throttle_list);
|
||||
rb_free(t);
|
||||
rb_patricia_remove(throttle_tree, pnode);
|
||||
}
|
||||
/* this can happen due to m_webirc.c's manipulations, for example */
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -820,7 +820,8 @@ set_default_conf(void)
|
|||
ConfigFileEntry.reject_after_count = 5;
|
||||
ConfigFileEntry.reject_ban_time = 300;
|
||||
ConfigFileEntry.reject_duration = 120;
|
||||
ConfigFileEntry.max_unknown_ip = 2;
|
||||
ConfigFileEntry.throttle_count = 4;
|
||||
ConfigFileEntry.throttle_duration = 60;
|
||||
|
||||
ServerInfo.default_max_clients = MAXCONNECTIONS;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -760,7 +760,6 @@ server_estab(struct Client *client_p)
|
|||
set_chcap_usage_counts(client_p);
|
||||
|
||||
rb_dlinkAdd(client_p, &client_p->lnode, &me.serv->servers);
|
||||
del_unknown_ip(client_p);
|
||||
rb_dlinkMoveNode(&client_p->localClient->tnode, &unknown_list, &serv_list);
|
||||
rb_dlinkAddTailAlloc(client_p, &global_serv_list);
|
||||
|
||||
|
|
|
|||
|
|
@ -527,7 +527,6 @@ register_local_user(struct Client *client_p, struct Client *source_p, const char
|
|||
Count.invisi++;
|
||||
|
||||
s_assert(!IsClient(source_p));
|
||||
del_unknown_ip(source_p);
|
||||
rb_dlinkMoveNode(&source_p->localClient->tnode, &unknown_list, &lclient_list);
|
||||
SetClient(source_p);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue