118 lines
5.4 KiB
C
118 lines
5.4 KiB
C
#ifndef TINC_CONNECTION_H
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#define TINC_CONNECTION_H
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/*
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connection.h -- header for connection.c
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Copyright (C) 2000-2016 Guus Sliepen <guus@tinc-vpn.org>,
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2000-2005 Ivo Timmermans
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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 along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <openssl/rsa.h>
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#include <openssl/evp.h>
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#include "avl_tree.h"
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#define OPTION_INDIRECT 0x0001
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#define OPTION_TCPONLY 0x0002
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#define OPTION_PMTU_DISCOVERY 0x0004
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#define OPTION_CLAMP_MSS 0x0008
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typedef struct connection_status_t {
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unsigned int pinged: 1; /* sent ping */
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unsigned int active: 1; /* 1 if active.. */
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unsigned int connecting: 1; /* 1 if we are waiting for a non-blocking connect() to finish */
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unsigned int unused_termreq: 1; /* the termination of this connection was requested */
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unsigned int remove: 1; /* Set to 1 if you want this connection removed */
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unsigned int timeout: 1; /* 1 if gotten timeout */
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unsigned int encryptout: 1; /* 1 if we can encrypt outgoing traffic */
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unsigned int decryptin: 1; /* 1 if we have to decrypt incoming traffic */
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unsigned int mst: 1; /* 1 if this connection is part of a minimum spanning tree */
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unsigned int proxy_passed: 1; /* 1 if we are connecting via a proxy and we have finished talking with it */
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unsigned int unused: 22;
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} connection_status_t;
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#include "edge.h"
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#include "net.h"
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#include "node.h"
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typedef struct connection_t {
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char *name; /* name he claims to have */
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union sockaddr_t address; /* his real (internet) ip */
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char *hostname; /* the hostname of its real ip */
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int protocol_version; /* used protocol */
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int socket; /* socket used for this connection */
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uint32_t options; /* options for this connection */
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connection_status_t status; /* status info */
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int estimated_weight; /* estimation for the weight of the edge for this connection */
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struct timeval start; /* time this connection was started, used for above estimation */
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struct outgoing_t *outgoing; /* used to keep track of outgoing connections */
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struct node_t *node; /* node associated with the other end */
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struct edge_t *edge; /* edge associated with this connection */
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RSA *rsa_key; /* his public/private key */
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const EVP_CIPHER *incipher; /* Cipher he will use to send data to us */
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const EVP_CIPHER *outcipher; /* Cipher we will use to send data to him */
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EVP_CIPHER_CTX *inctx; /* Context of encrypted meta data that will come from him to us */
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EVP_CIPHER_CTX *outctx; /* Context of encrypted meta data that will be sent from us to him */
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uint64_t inbudget; /* Encrypted bytes send budget */
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uint64_t outbudget; /* Encrypted bytes receive budget */
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char *inkey; /* His symmetric meta key + iv */
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char *outkey; /* Our symmetric meta key + iv */
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int inkeylength; /* Length of his key + iv */
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int outkeylength; /* Length of our key + iv */
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const EVP_MD *indigest;
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const EVP_MD *outdigest;
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int inmaclength;
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int outmaclength;
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int incompression;
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int outcompression;
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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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char buffer[MAXBUFSIZE]; /* metadata input buffer */
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int buflen; /* bytes read into buffer */
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int reqlen; /* length of incoming request */
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length_t tcplen; /* length of incoming TCPpacket */
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int allow_request; /* defined if there's only one request possible */
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char *outbuf; /* metadata output buffer */
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int outbufstart; /* index of first meaningful byte in output buffer */
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int outbuflen; /* number of meaningful bytes in output buffer */
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int outbufsize; /* number of bytes allocated to output buffer */
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time_t last_ping_time; /* last time we saw some activity from the other end or pinged them */
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time_t last_flushed_time; /* last time buffer was empty. Only meaningful if outbuflen > 0 */
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avl_tree_t *config_tree; /* Pointer to configuration tree belonging to him */
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} connection_t;
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extern avl_tree_t *connection_tree;
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extern connection_t *everyone;
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extern void init_connections(void);
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extern void exit_connections(void);
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extern connection_t *new_connection(void) __attribute__((__malloc__));
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extern void free_connection(connection_t *c);
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extern void free_connection_partially(connection_t *c);
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extern void connection_add(connection_t *c);
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extern void connection_del(connection_t *c);
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extern void dump_connections(void);
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#endif
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