mirror of https://github.com/BOINC/boinc.git
117 lines
3.8 KiB
C++
117 lines
3.8 KiB
C++
// Berkeley Open Infrastructure for Network Computing
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// http://boinc.berkeley.edu
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// Copyright (C) 2005 University of California
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//
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// This is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation;
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// either version 2.1 of the License, or (at your option) any later version.
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//
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// This software 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.
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// See the GNU Lesser General Public License for more details.
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//
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// To view the GNU Lesser General Public License visit
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// http://www.gnu.org/copyleft/lesser.html
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// or write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#ifndef _NET_XFER_
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#define _NET_XFER_
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#ifndef _WIN32
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#include <stdio.h>
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#include <time.h>
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#include <vector>
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#endif
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// The following classes implement polling (non-blocking) I/O
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// between a disk file (or memory block) and a socket
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#define MAX_BLOCKSIZE 16384
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// represents a network connection, either being accessed directly
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// or being transferred to/from a file
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//
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class NET_XFER {
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public:
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FILE* file;
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int socket;
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char hostname[256]; // The host we're connecting to (possibly a proxy)
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bool is_connected;
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bool want_download; // at most one should be true
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bool want_upload;
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bool do_file_io;
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// If true: poll() should transfer data to/from file
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// (in which case "file" and blocksize are relevant)
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// If false: set io_ready (higher layers will do I/O)
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bool io_done;
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// set to true when the current transfer is over:
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// - the transfer timed out (not activity for a long time)
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// - network connect failed
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// - got EOF on socket read (0 bytes, select indicated I/O ready)
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// - error on disk write (e.g. volume full)
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// - reached end of disk file on upload
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// - got file read error on upload
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// - write to socket failed on upload
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bool io_ready;
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// Signals higher layers that they can read or write socket now
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// (used if !do_file_io)
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int error;
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int port;
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int blocksize;
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double start_time;
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double xfer_speed;
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double bytes_xferred; // bytes transferred in this session
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char file_read_buf[MAX_BLOCKSIZE];
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int file_read_buf_offset, file_read_buf_len;
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int seconds_until_timeout;
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NET_XFER();
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~NET_XFER();
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void reset();
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void init(char* host, int port, int blocksize);
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int get_ip_addr(int &ip_addr);
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int open_server();
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void close_socket();
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void close_file();
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int do_xfer(int&);
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void update_speed();
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void got_error();
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char* get_hostname();
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bool check_timeout(bool);
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void reset_timeout();
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};
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// bandwidth limitation is implemented at this level, as follows:
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// There are limits max_bytes_sec_up and max_bytes_sec_down.
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// We keep track of the last time and bytes_left_up and bytes_left_down;
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// Each second we reset these to zero.
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class NET_XFER_SET {
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std::vector<NET_XFER*> net_xfers;
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public:
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NET_XFER_SET();
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double max_bytes_sec_up, max_bytes_sec_down;
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// user-specified limits on throughput
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double bytes_left_up, bytes_left_down;
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// bytes left to transfer in the current second
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double bytes_up, bytes_down;
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// total bytes transferred
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bool up_active, down_active;
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// has there been transfer activity since last call to check_active()?
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int last_time;
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int insert(NET_XFER*);
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int remove(NET_XFER*);
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bool poll();
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int net_sleep(double);
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int do_select(double& bytes_transferred, double timeout);
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NET_XFER* lookup_fd(int); // lookup by fd
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void check_active(bool&, bool&);
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};
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#endif
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