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76 lines
2.8 KiB
C
76 lines
2.8 KiB
C
/* This file is part of Netsukuku
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* (c) Copyright 2004 Andrea Lo Pumo aka AlpT <alpt@freaknet.org>
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*
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* This source code is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License,
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* or (at your option) any later version.
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*
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* This source code 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.
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* Please refer to the GNU Public License for more details.
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*
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* You should have received a copy of the GNU Public License along with
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* this source code; if not, write to:
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* Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef ACCEPT_H
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#define ACCEPT_H
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#define MAX_CONNECTIONS 512
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#define MAX_ACCEPTS 16
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#define FREE_ACCEPT_TIME 4 /*in seconds*/
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/*
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* This struct keep tracks of single connection to the server.
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* The thread_daemon who handle the connection knows the connection
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* position in the accept_tbl.
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*/
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struct accept_table
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{
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inet_prefix ip; /*Ip of the node connected*/
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unsigned char accepts; /*Number of connection from this node*/
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pid_t *pid; /*The pid of each child that have accepted the conn*/
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unsigned char *closed; /*Each element of this array is 1 or 0. It indicates if the connection has
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been closed*/
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time_t *acp_t; /*The time when the connection was accepted. The "accepts" counter
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will decrement when one of the acp_t+FREE_ACCEPT_TIME will
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be <= current_time AND (the relative pid will be non existent OR
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the relative closed element will be == 1)
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*/
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struct request_tbl rqtbl; /*The request table*/
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};
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/* This struct keeps all the info regarding each node connected */
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struct accept_table *accept_tbl;
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/*
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* accept_idx is the position of the accept_tbl of a thread.
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* accept_sidx is the second index, it is used for example in pid[accept_sidx]
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* note: this var are used only in the child and the child doesn't need to modify them!
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*/
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int accept_idx, accept_sidx;
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pthread_mutex_t mtx_acpt_idx, mtx_acpt_sidx;
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int update_accept_tbl_mutex;
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int max_connections, max_accepts_per_host, free_accept_time;
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void init_accept_tbl(int startups, int accepts, int time);
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void destroy_accept_tbl(void);
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void update_accept_tbl(void);
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int find_ip_acpt(inet_prefix ip);
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int find_first_free(void);
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int is_ip_acpt_free(inet_prefix ip, int *index);
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int find_free_acp_t(int idx);
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int new_accept(int idx, inet_prefix ip);
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int add_accept(inet_prefix ip, int replace);
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void del_accept(int idx, int *sidx);
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int close_accept(int idx, int sidx);
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void add_accept_pid(pid_t pid, int idx, int sidx);
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#endif /*ACCEPT_H*/
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