124 lines
5 KiB
C
124 lines
5 KiB
C
/*
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connection.h -- header for connection.c
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Copyright (C) 2000 Guus Sliepen <guus@sliepen.warande.net>,
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2000 Ivo Timmermans <itimmermans@bigfoot.com>
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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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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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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: connection.h,v 1.1.2.3 2000/11/22 22:18:03 guus Exp $
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*/
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#ifndef __TINC_CONNECTION_H__
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#define __TINC_CONNECTION_H__
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#include <rbl.h>
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#include "config.h"
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#ifdef HAVE_OPENSSL_EVP_H
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# include <openssl/evp.h>
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#else
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# include <evp.h>
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#endif
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#ifdef HAVE_OPENSSL_RSA_H
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# include <openssl/rsa.h>
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#else
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# include <rsa.h>
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#endif
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#include "net.h"
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#include "conf.h"
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typedef struct status_bits_t {
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int pinged:1; /* sent ping */
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int meta:1; /* meta connection exists */
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int active:1; /* 1 if active.. */
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int outgoing:1; /* I myself asked for this conn */
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int termreq:1; /* the termination of this connection was requested */
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int remove:1; /* Set to 1 if you want this connection removed */
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int timeout:1; /* 1 if gotten timeout */
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int validkey:1; /* 1 if we currently have a valid key for him */
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int waitingforkey:1; /* 1 if we already sent out a request */
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int dataopen:1; /* 1 if we have a valid UDP connection open */
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int encryptout:1; /* 1 if we can encrypt outgoing traffic */
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int decryptin:1; /* 1 if we have to decrypt incoming traffic */
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int unused:18;
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} status_bits_t;
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typedef struct option_bits_t {
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int unused:32;
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} option_bits_t;
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typedef struct connection_t {
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char *name; /* name of this connection */
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ipv4_t address; /* his real (internet) ip */
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char *hostname; /* the hostname of its real ip */
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short unsigned int port; /* his portnumber */
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int protocol_version; /* used protocol */
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long unsigned int options; /* options turned on for this connection */
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int flags; /* his flags */
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int socket; /* our udp vpn socket */
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int meta_socket; /* our tcp meta socket */
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status_bits_t status; /* status info */
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packet_queue_t *sq; /* pending outgoing packets */
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packet_queue_t *rq; /* pending incoming packets (they have no
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valid key to be decrypted with) */
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RSA *rsa_key; /* the public/private key */
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EVP_CIPHER_CTX *cipher_inctx; /* Context of encrypted meta data that will come from him to us */
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EVP_CIPHER_CTX *cipher_outctx; /* Context of encrypted meta data that will be sent from us to him */
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char *cipher_inkey; /* His symmetric meta key */
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char *cipher_outkey; /* Our symmetric meta key */
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EVP_CIPHER *cipher_pkttype; /* Cipher type for encrypted vpn packets */
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char *cipher_pktkey; /* Cipher key and iv */
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int cipher_pktkeylength; /* Cipher key and iv length*/
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char *buffer; /* metadata input buffer */
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int buflen; /* bytes read into buffer */
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int reqlen; /* length of first request in buffer */
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int allow_request; /* defined if there's only one request possible */
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time_t last_ping_time; /* last time we saw some activity from the other end */
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char *mychallenge; /* challenge we received from him */
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char *hischallenge; /* challenge we sent to him */
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struct connection_t *nexthop; /* nearest meta-hop in this direction */
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rbltree_t *subnet_tree; /* Pointer to a tree of subnets belonging to this connection */
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struct config_t *config; /* Pointer to configuration tree belonging to this host */
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} connection_t;
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extern rbltree_t *connection_tree;
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extern connection_t *myself;
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extern void init_connections(void);
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extern connection_t *new_connection(void);
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extern void free_connection(connection_t *);
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extern void id_add(connection_t *);
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extern void connection_add(connection_t *);
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extern void connection_del(connection_t *);
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extern connection_t *lookup_id(char *);
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extern connection_t *lookup_connection(ipv4_t, short unsigned int);
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extern void dump_connection_list(void);
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extern int read_host_config(connection_t *);
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extern void destroy_connection_tree(void);
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extern void prune_connection_tree(void);
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#endif /* __TINC_CONNECTION_H__ */
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