Import Upstream version 1.0pre7

src/connection.h

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+/*
+    connection.h -- header for connection.c
+    Copyright (C) 2000-2002 Guus Sliepen <guus@sliepen.warande.net>,
+                  2000-2002 Ivo Timmermans <itimmermans@bigfoot.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: connection.h,v 1.1.2.26 2002/02/20 19:25:09 guus Exp $
+*/
+
+#ifndef __TINC_CONNECTION_H__
+#define __TINC_CONNECTION_H__
+
+#include <sys/time.h>
+
+#include <avl_tree.h>
+#include <list.h>
+
+#ifdef HAVE_OPENSSL_EVP_H
+# include <openssl/evp.h>
+#else
+# include <evp.h>
+#endif
+
+#ifdef HAVE_OPENSSL_RSA_H
+# include <openssl/rsa.h>
+#else
+# include <rsa.h>
+#endif
+
+#include "net.h"
+#include "conf.h"
+
+#include "node.h"
+#include "edge.h"
+
+#define OPTION_INDIRECT		0x0001
+#define OPTION_TCPONLY		0x0002
+
+typedef struct connection_status_t {
+  int pinged:1;                    /* sent ping */
+  int active:1;                    /* 1 if active.. */
+  int connecting:1;                /* 1 if we are waiting for a non-blocking connect() to finish */
+  int termreq:1;                   /* the termination of this connection was requested */
+  int remove:1;                    /* Set to 1 if you want this connection removed */
+  int timeout:1;                   /* 1 if gotten timeout */
+  int encryptout:1;		   /* 1 if we can encrypt outgoing traffic */
+  int decryptin:1;                 /* 1 if we have to decrypt incoming traffic */
+  int mst:1;			   /* 1 if this connection is part of a minimum spanning tree */
+  int unused:18;
+} connection_status_t;
+
+typedef struct connection_t {
+  char *name;                      /* name he claims to have */
+
+  sockaddr_t address;              /* his real (internet) ip */
+  char *hostname;                  /* the hostname of its real ip */
+  int protocol_version;            /* used protocol */
+
+  int socket;                      /* socket used for this connection */
+  long int options;                /* options for this connection */
+  struct connection_status_t status; /* status info */
+  int estimated_weight;            /* estimation for the weight of the edge for this connection */
+  struct timeval start;            /* time this connection was started, used for above estimation */
+  struct outgoing_t *outgoing;     /* used to keep track of outgoing connections */
+
+  struct node_t *node;             /* node associated with the other end */
+  struct edge_t *edge;             /* edge associated with this connection */
+
+  RSA *rsa_key;                    /* his public/private key */
+  const EVP_CIPHER *incipher;      /* Cipher he will use to send data to us */
+  const EVP_CIPHER *outcipher;     /* Cipher we will use to send data to him */
+  EVP_CIPHER_CTX *inctx;           /* Context of encrypted meta data that will come from him to us */
+  EVP_CIPHER_CTX *outctx;          /* Context of encrypted meta data that will be sent from us to him */
+  char *inkey;                     /* His symmetric meta key + iv */
+  char *outkey;                    /* Our symmetric meta key + iv */
+  int inkeylength;                 /* Length of his key + iv */
+  int outkeylength;                /* Length of our key + iv */
+  const EVP_MD *indigest;
+  const EVP_MD *outdigest;
+  int inmaclength;
+  int outmaclength;
+  int incompression;
+  int outcompression;
+  char *mychallenge;               /* challenge we received from him */
+  char *hischallenge;              /* challenge we sent to him */
+
+  char buffer[MAXBUFSIZE];         /* metadata input buffer */
+  int buflen;                      /* bytes read into buffer */
+  int tcplen;                      /* length of incoming TCPpacket */
+  int allow_request;               /* defined if there's only one request possible */
+
+  time_t last_ping_time;           /* last time we saw some activity from the other end */
+
+  avl_tree_t *config_tree;         /* Pointer to configuration tree belonging to him */
+} connection_t;
+
+extern avl_tree_t *connection_tree;
+
+extern void init_connections(void);
+extern void exit_connections(void);
+extern connection_t *new_connection(void);
+extern void free_connection(connection_t *);
+extern void connection_add(connection_t *);
+extern void connection_del(connection_t *);
+extern void dump_connections(void);
+extern int read_connection_config(connection_t *);
+
+#endif /* __TINC_CONNECTION_H__ */