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Created V0.3.x branch and moved the head into the trunk directory.

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git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@246 b45a01b8-16f6-495d-af2f-9b41ad6348cc
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drbob 2007-11-15 03:18:48 +00:00
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libretroshare/src/pqi/pqissludp.h Normal file
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/*
* "$Id: pqissludp.h,v 1.8 2007-02-18 21:46:49 rmf24 Exp $"
*
* 3P/PQI network interface for RetroShare.
*
* Copyright 2004-2006 by Robert Fernie.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License Version 2 as published by the Free Software Foundation.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Please report all bugs and problems to "retroshare@lunamutt.com".
*
*/
#ifndef MRK_PQI_SSL_UDP_HEADER
#define MRK_PQI_SSL_UDP_HEADER
#include <openssl/ssl.h>
// operating system specific network header.
#include "pqi/pqinetwork.h"
#include <string>
#include <map>
#include "pqi/pqissl.h"
// function for discovering certificates.
//int connectForExchange(struct sockaddr_in addr);
//
//
//
//
/* So pqissludp is the special firewall breaking protocol.
* This class will implement the basics of streaming
* ssl over udp using a tcponudp library....
* and a small extension to ssl.
*/
class pqissludp;
class pqiudpproxy;
class p3udpproxy;
class cert;
/* no such thing as a listener .... actually each one
* can receive connections..... its the stateless you see!.
*
* so pqiudplistener
*
* will be the support udp listener for proxy connections.
* this will be used by the p3proxy for external addresses.
*/
class pqiudplistener
{
public:
pqiudplistener(p3udpproxy *p, struct sockaddr_in addr);
int resetlisten();
int setListenAddr(struct sockaddr_in addr);
int setuplisten();
int tick(); /* does below */
int status();
int recvfrom(void *data, int *size, struct sockaddr_in &addr);
int reply(void *data, int size, struct sockaddr_in &addr);
private:
int serverStun();
bool response(void *data, int size, struct sockaddr_in &addr);
int checkExtAddr(struct sockaddr_in &src_addr,
void *data, int size, struct sockaddr_in &ext_addr);
bool generate_stun_pkt(void *stun_pkt, int *len);
void *generate_stun_reply(struct sockaddr_in *stun_addr, int *len);
p3udpproxy *p3u;
int sockfd;
struct sockaddr_in laddr;
bool active;
int laststun, firstattempt, lastattempt;
/* last stun packet sent out */
struct sockaddr_in stun_addr;
void *stunpkt;
int stunpktlen;
};
/* This provides a NetBinInterface, which is
* primarily inherited from pqissl.
* fns declared here are different -> all others are identical.
*/
class pqissludp: public pqissl
{
public:
pqissludp(cert *c, PQInterface *parent, pqiudpproxy *prxy);
virtual ~pqissludp();
// NetInterface.
// listen fns call the udpproxy.
virtual int listen();
virtual int stoplistening();
virtual int tick();
virtual int reset();
// BinInterface.
// These are reimplemented.
virtual bool moretoread();
virtual bool cansend();
/* UDP always through firewalls -> always bandwidth Limited */
virtual bool bandwidthLimited() { return true; }
// pqissludp specific.
// These three functions must
// be called to initiate a connection;
int attach(sockaddr_in&);
// stun packet handling.
void *generate_stun_pkt(struct sockaddr_in *stun_addr, int *len);
int getStunReturnedAddr(void *pkt, int len, struct sockaddr_in *stun_addr);
protected:
virtual int Request_Proxy_Connection();// Overloaded -> all 7.
virtual int Check_Proxy_Connection();
virtual int Request_Local_Address();
virtual int Determine_Local_Address();
virtual int Determine_Remote_Address();
virtual int Initiate_Connection();
virtual int Basic_Connection_Complete();
virtual int Reattempt_Connection();
//protected internal fns that are overloaded for udp case.
virtual int net_internal_close(int fd);
virtual int net_internal_SSL_set_fd(SSL *ssl, int fd);
virtual int net_internal_fcntl_nonblock(int fd);
private:
BIO *tou_bio; // specific to ssludp.
pqiudpproxy *udpproxy;
// are these needed at all??
struct sockaddr_in local_addr; // ssludp
struct sockaddr_in firewall_addr; // ssludp
struct sockaddr_in stun_addr; //pqissl.
int stun_timeout;
int stun_attempts;
int remote_timeout;
int proxy_timeout;
int udp_connect_timeout;
long listen_checktime;
};
#endif // MRK_PQI_SSL_UDP_HEADER