rename src to ircd, libcore to libircd
This commit is contained in:
William Pitcock
parent
df317d705b
commit
ff12cc9479
55 changed files with 9 additions and 9 deletions
369
ircd/packet.c
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369
ircd/packet.c
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/*
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* ircd-ratbox: A slightly useful ircd.
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* packet.c: Packet handlers.
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*
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* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
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* Copyright (C) 1996-2002 Hybrid Development Team
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* Copyright (C) 2002-2005 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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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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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* USA
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*
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* $Id: packet.c 3446 2007-05-14 22:21:16Z jilles $
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*/
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#include "stdinc.h"
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#include "s_conf.h"
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#include "s_serv.h"
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#include "client.h"
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#include "common.h"
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#include "ircd.h"
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#include "parse.h"
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#include "packet.h"
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#include "match.h"
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#include "hook.h"
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#include "send.h"
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#include "s_assert.h"
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static char readBuf[READBUF_SIZE];
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static void client_dopacket(struct Client *client_p, char *buffer, size_t length);
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/*
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* parse_client_queued - parse client queued messages
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*/
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static void
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parse_client_queued(struct Client *client_p)
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{
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int dolen = 0;
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int allow_read;
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if(IsAnyDead(client_p))
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return;
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if(IsUnknown(client_p))
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{
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allow_read = ConfigFileEntry.client_flood_burst_max;
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for (;;)
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{
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if(client_p->localClient->sent_parsed >= allow_read)
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break;
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dolen = rb_linebuf_get(&client_p->localClient->
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buf_recvq, readBuf, READBUF_SIZE,
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LINEBUF_COMPLETE, LINEBUF_PARSED);
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if(dolen <= 0 || IsDead(client_p))
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break;
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client_dopacket(client_p, readBuf, dolen);
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client_p->localClient->sent_parsed++;
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/* He's dead cap'n */
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if(IsAnyDead(client_p))
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return;
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/* if theyve dropped out of the unknown state, break and move
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* to the parsing for their appropriate status. --fl
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*/
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if(!IsUnknown(client_p))
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{
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/* reset their flood limits, they're now
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* graced to flood
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*/
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client_p->localClient->sent_parsed = 0;
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break;
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}
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}
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/* If sent_parsed is impossibly high, drop it down.
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* This is useful if the configuration is changed.
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*/
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if(client_p->localClient->sent_parsed > allow_read)
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client_p->localClient->sent_parsed = allow_read;
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}
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if(IsAnyServer(client_p) || IsExemptFlood(client_p))
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{
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while (!IsAnyDead(client_p) && (dolen = rb_linebuf_get(&client_p->localClient->buf_recvq,
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readBuf, READBUF_SIZE, LINEBUF_COMPLETE,
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LINEBUF_PARSED)) > 0)
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{
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client_dopacket(client_p, readBuf, dolen);
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}
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}
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else if(IsClient(client_p))
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{
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if(IsFloodDone(client_p))
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allow_read = ConfigFileEntry.client_flood_burst_max;
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else
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allow_read = ConfigFileEntry.client_flood_burst_rate;
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allow_read *= ConfigFileEntry.client_flood_message_time;
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/* allow opers 4 times the amount of messages as users. why 4?
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* why not. :) --fl_
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*/
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if(IsOper(client_p) && ConfigFileEntry.no_oper_flood)
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allow_read *= 4;
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/*
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* Handle flood protection here - if we exceed our flood limit on
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* messages in this loop, we simply drop out of the loop prematurely.
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* -- adrian
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*/
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for (;;)
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{
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/* This flood protection works as follows:
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*
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* A client is given allow_read lines to send to the server. Every
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* time a line is parsed, sent_parsed is increased. sent_parsed
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* is decreased by 1 every time flood_recalc is called.
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*
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* Thus a client can 'burst' allow_read lines to the server, any
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* excess lines will be parsed one per flood_recalc() call.
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*
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* Therefore a client will be penalised more if they keep flooding,
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* as sent_parsed will always hover around the allow_read limit
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* and no 'bursts' will be permitted.
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*/
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if(client_p->localClient->sent_parsed >= allow_read)
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break;
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dolen = rb_linebuf_get(&client_p->localClient->
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buf_recvq, readBuf, READBUF_SIZE,
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LINEBUF_COMPLETE, LINEBUF_PARSED);
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if(!dolen)
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break;
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client_dopacket(client_p, readBuf, dolen);
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if(IsAnyDead(client_p))
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return;
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client_p->localClient->sent_parsed += ConfigFileEntry.client_flood_message_time;
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}
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/* If sent_parsed is impossibly high, drop it down.
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* This is useful if the configuration is changed.
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*/
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if(client_p->localClient->sent_parsed > allow_read +
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ConfigFileEntry.client_flood_message_time - 1)
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client_p->localClient->sent_parsed = allow_read +
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ConfigFileEntry.client_flood_message_time - 1;
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}
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}
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/* flood_endgrace()
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*
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* marks the end of the clients grace period
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*/
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void
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flood_endgrace(struct Client *client_p)
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{
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SetFloodDone(client_p);
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/* sent_parsed could be way over client_flood_burst_max but under
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* client_flood_burst_rate so reset it.
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*/
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client_p->localClient->sent_parsed = 0;
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}
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/*
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* flood_recalc
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*
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* recalculate the number of allowed flood lines. this should be called
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* once a second on any given client. We then attempt to flush some data.
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*/
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void
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flood_recalc(void *unused)
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{
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rb_dlink_node *ptr, *next;
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struct Client *client_p;
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RB_DLINK_FOREACH_SAFE(ptr, next, lclient_list.head)
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{
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client_p = ptr->data;
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if(rb_unlikely(IsMe(client_p)))
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continue;
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if(rb_unlikely(client_p->localClient == NULL))
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continue;
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if(IsFloodDone(client_p))
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client_p->localClient->sent_parsed -= ConfigFileEntry.client_flood_message_num;
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else
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client_p->localClient->sent_parsed = 0;
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if(client_p->localClient->sent_parsed < 0)
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client_p->localClient->sent_parsed = 0;
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parse_client_queued(client_p);
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if(rb_unlikely(IsAnyDead(client_p)))
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continue;
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}
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RB_DLINK_FOREACH_SAFE(ptr, next, unknown_list.head)
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{
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client_p = ptr->data;
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if(client_p->localClient == NULL)
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continue;
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client_p->localClient->sent_parsed--;
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if(client_p->localClient->sent_parsed < 0)
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client_p->localClient->sent_parsed = 0;
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parse_client_queued(client_p);
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}
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}
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/*
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* read_packet - Read a 'packet' of data from a connection and process it.
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*/
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void
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read_packet(rb_fde_t * F, void *data)
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{
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struct Client *client_p = data;
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int length = 0;
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int binary = 0;
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#ifdef USE_IODEBUG_HOOKS
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hook_data_int hdata;
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#endif
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while(1)
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{
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if(IsAnyDead(client_p))
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return;
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/*
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* Read some data. We *used to* do anti-flood protection here, but
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* I personally think it makes the code too hairy to make sane.
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* -- adrian
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*/
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length = rb_read(client_p->localClient->F, readBuf, READBUF_SIZE);
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if(length < 0)
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{
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if(rb_ignore_errno(errno))
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rb_setselect(client_p->localClient->F,
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RB_SELECT_READ, read_packet, client_p);
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else
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error_exit_client(client_p, length);
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return;
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}
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else if(length == 0)
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{
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error_exit_client(client_p, length);
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return;
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}
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#ifdef USE_IODEBUG_HOOKS
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hdata.client = client_p;
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hdata.arg1 = readBuf;
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hdata.arg2 = length;
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call_hook(h_iorecv_id, &hdata);
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#endif
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if(client_p->localClient->lasttime < rb_current_time())
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client_p->localClient->lasttime = rb_current_time();
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client_p->flags &= ~FLAGS_PINGSENT;
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/*
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* Before we even think of parsing what we just read, stick
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* it on the end of the receive queue and do it when its
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* turn comes around.
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*/
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if(IsHandshake(client_p) || IsUnknown(client_p))
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binary = 1;
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(void) rb_linebuf_parse(&client_p->localClient->buf_recvq, readBuf, length, binary);
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if(IsAnyDead(client_p))
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return;
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/* Attempt to parse what we have */
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parse_client_queued(client_p);
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if(IsAnyDead(client_p))
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return;
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/* Check to make sure we're not flooding */
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if(!IsAnyServer(client_p) &&
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(rb_linebuf_alloclen(&client_p->localClient->buf_recvq) > ConfigFileEntry.client_flood_max_lines))
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{
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if(!(ConfigFileEntry.no_oper_flood && IsOper(client_p)))
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{
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exit_client(client_p, client_p, client_p, "Excess Flood");
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return;
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}
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}
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/* bail if short read */
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if(length < READBUF_SIZE)
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{
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rb_setselect(client_p->localClient->F, RB_SELECT_READ, read_packet, client_p);
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return;
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}
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}
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}
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/*
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* client_dopacket - copy packet to client buf and parse it
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* client_p - pointer to client structure for which the buffer data
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* applies.
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* buffer - pointr to the buffer containing the newly read data
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* length - number of valid bytes of data in the buffer
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*
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* Note:
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* It is implicitly assumed that dopacket is called only
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* with client_p of "local" variation, which contains all the
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* necessary fields (buffer etc..)
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*/
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void
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client_dopacket(struct Client *client_p, char *buffer, size_t length)
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{
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s_assert(client_p != NULL);
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s_assert(buffer != NULL);
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if(client_p == NULL || buffer == NULL)
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return;
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if(IsAnyDead(client_p))
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return;
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/*
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* Update messages received
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*/
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++me.localClient->receiveM;
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++client_p->localClient->receiveM;
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/*
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* Update bytes received
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*/
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client_p->localClient->receiveB += length;
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if(client_p->localClient->receiveB > 1023)
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{
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client_p->localClient->receiveK += (client_p->localClient->receiveB >> 10);
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client_p->localClient->receiveB &= 0x03ff; /* 2^10 = 1024, 3ff = 1023 */
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}
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me.localClient->receiveB += length;
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if(me.localClient->receiveB > 1023)
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{
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me.localClient->receiveK += (me.localClient->receiveB >> 10);
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me.localClient->receiveB &= 0x03ff;
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}
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parse(client_p, buffer, buffer + length);
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}
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