mirror of https://github.com/aria2/aria2
286 lines
8.3 KiB
C++
286 lines
8.3 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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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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*
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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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*
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef _D_SOCKET_CORE_H_
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#define _D_SOCKET_CORE_H_
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#include "common.h"
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#include "a2io.h"
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#include "a2netcompat.h"
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#include "a2time.h"
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#include <cstdlib>
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#include <string>
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#include <utility>
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#ifdef HAVE_LIBSSL
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// for SSL
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# include <openssl/ssl.h>
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# include <openssl/err.h>
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#endif // HAVE_LIBSSL
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#ifdef HAVE_LIBGNUTLS
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# include <gnutls/gnutls.h>
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#endif // HAVE_LIBGNUTLS
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#ifdef HAVE_EPOLL
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# include <sys/epoll.h>
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#endif // HAVE_EPOLL
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namespace aria2 {
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class SocketCore {
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friend bool operator==(const SocketCore& s1, const SocketCore& s2);
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friend bool operator!=(const SocketCore& s1, const SocketCore& s2);
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friend bool operator<(const SocketCore& s1, const SocketCore& s2);
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private:
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// socket type defined in <sys/socket.h>
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int _sockType;
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// socket endpoint descriptor
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sock_t sockfd;
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#ifdef HAVE_EPOLL
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// file descriptor used for epoll
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int _epfd;
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struct epoll_event _epEvent;
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#endif // HAVE_EPOLL
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bool blocking;
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bool secure;
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#ifdef HAVE_LIBSSL
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// for SSL
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SSL_CTX* sslCtx;
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SSL* ssl;
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#endif // HAVE_LIBSSL
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#ifdef HAVE_LIBGNUTLS
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gnutls_session_t sslSession;
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gnutls_certificate_credentials_t sslXcred;
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char* peekBuf;
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size_t peekBufLength;
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size_t peekBufMax;
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size_t shiftPeekData(char* data, size_t len);
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void addPeekData(char* data, size_t len);
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ssize_t gnutlsRecv(char* data, size_t len);
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ssize_t gnutlsPeek(char* data, size_t len);
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#endif // HAVE_LIBGNUTLS
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void init();
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#ifdef HAVE_EPOLL
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void initEPOLL();
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#endif // HAVE_EPOLL
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SocketCore(sock_t sockfd, int sockType);
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static int error();
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static const char *errorMsg();
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static const char *errorMsg(const int err);
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public:
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SocketCore(int sockType = SOCK_STREAM);
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~SocketCore();
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sock_t getSockfd() const { return sockfd; }
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bool isOpen() const { return sockfd != -1; }
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/**
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* Creates a socket and bind it with locahost's address and port.
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* @param port port to listen. If 0 is specified, os automaticaly
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* choose avaiable port.
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*/
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void bind(uint16_t port);
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/**
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* Listens form connection on it.
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* Call bind(uint16_t) before calling this function.
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*/
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void beginListen();
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/**
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* Stores host address and port of this socket to addrinfo.
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* @param addrinfo placeholder to store host address and port.
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*/
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void getAddrInfo(std::pair<std::string, uint16_t>& addrinfo) const;
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/**
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* Stores peer's address and port to peerinfo.
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* @param peerinfo placeholder to store peer's address and port.
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*/
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void getPeerInfo(std::pair<std::string, uint16_t>& peerinfo) const;
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/**
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* Accepts incoming connection on this socket.
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* You must call beginListen() before calling this method.
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* @return accepted socket. The caller must delete it after using it.
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*/
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SocketCore* acceptConnection() const;
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/**
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* Connects to the server named host and the destination port is port.
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* This method makes socket non-blocking mode.
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* To make the socket blocking mode again, call setBlockingMode() after
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* the connection is established.
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* @param host hostname or ip address to connect to
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* @param port service port number to connect to
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*/
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void establishConnection(const std::string& host, uint16_t port);
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void setNonBlockingMode();
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/**
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* Makes this socket blocking mode.
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*/
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void setBlockingMode();
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/**
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* Closes the connection of this socket.
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*/
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void closeConnection();
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/**
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* Checks whether this socket is available for writing.
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* @param timeout the amount of time elapsed before the checking are timed
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* out.
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* @return true if the socket is available for writing,
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* otherwise returns false.
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*/
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bool isWritable(time_t timeout);
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/**
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* Checks whether this socket is available for reading.
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* @param timeout the amount of time elapsed before the checking are timed
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* out.
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* @return true if the socket is available for reading,
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* otherwise returns false.
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*/
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bool isReadable(time_t timeout);
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/**
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* Writes characters into this socket. data is a pointer pointing the first
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* byte of the data and len is the length of data.
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* This method internally calls isWritable(). The parmeter timeout is used
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* for this method call.
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* @param data data to write
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* @param len length of data
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*/
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ssize_t writeData(const char* data, size_t len);
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ssize_t writeData(const std::string& msg)
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{
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return writeData(msg.c_str(), msg.size());
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}
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ssize_t writeData(const unsigned char* data, size_t len)
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{
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return writeData(reinterpret_cast<const char*>(data), len);
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}
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void writeData(const char* data, size_t len, const std::string& host, uint16_t port);
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void writeData(const unsigned char* data, size_t len, const std::string& host,
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uint16_t port)
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{
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writeData(reinterpret_cast<const char*>(data), len, host, port);
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}
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/**
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* Reads up to len bytes from this socket.
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* data is a pointer pointing the first
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* byte of the data, which must be allocated before this method is called.
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* len is the size of the allocated memory. When this method returns
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* successfully, len is replaced by the size of the read data.
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* This method internally calls isReadable(). The parameter timeout is used
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* for this method call.
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* @param data holder to store data.
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* @param len the maximum size data can store. This method assigns
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* the number of bytes read to len.
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*/
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void readData(char* data, size_t& len);
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void readData(unsigned char* data, size_t& len)
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{
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readData(reinterpret_cast<char*>(data), len);
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}
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ssize_t readDataFrom(char* data, size_t len,
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std::pair<std::string /* numerichost */,
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uint16_t /* port */>& sender);
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ssize_t readDataFrom(unsigned char* data, size_t len,
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std::pair<std::string /* numerichost */,
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uint16_t /* port */>& sender)
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{
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return readDataFrom(reinterpret_cast<char*>(data), len, sender);
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}
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/**
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* Reads up to len bytes from this socket, but bytes are not removed from
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* this socket.
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* This method internally calls isReadable(). The parameter timeout is used
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* for this method call.
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* @param data holder to store data.
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* @param len the maximum size data can store. This method assigns
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* the number of bytes read to len.
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*/
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void peekData(char* data, size_t& len);
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void peekData(unsigned char* data, size_t& len)
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{
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peekData(reinterpret_cast<char*>(data), len);
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}
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/**
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* Makes this socket secure.
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* If the system has not OpenSSL, then this method do nothing.
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* connection must be established before calling this method.
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*/
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void initiateSecureConnection();
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bool operator==(const SocketCore& s) {
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return sockfd == s.sockfd;
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}
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bool operator!=(const SocketCore& s) {
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return !(*this == s);
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}
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bool operator<(const SocketCore& s) {
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return sockfd < s.sockfd;
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}
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};
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} // namespace aria2
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#endif // _D_SOCKET_CORE_H_
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