596 lines
12 KiB
C++
596 lines
12 KiB
C++
//
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// ZoneMinder Communications Class Implementation, $Date$, $Revision$
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// Copyright (C) 2003, 2004, 2005 Philip Coombes
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <memory.h>
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#include <alloca.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include "zm.h"
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#include "zm_db.h"
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#include "zm_comms.h"
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bool CommsBase::Terminate()
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{
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if ( IsOpen() )
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{
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Close();
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}
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return( true );
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}
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bool CommsBase::Reopen()
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{
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if ( !Close() )
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return( false );
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if ( !Open() )
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return( false );
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return( true );
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}
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int CommsBase::ReadV( int iovcnt, /* const void *, int, */ ... )
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{
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va_list arg_ptr;
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//struct iovec iov[iovcnt];
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struct iovec *iov = (struct iovec *)alloca( sizeof(struct iovec)*iovcnt );
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va_start( arg_ptr, iovcnt );
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for ( int i = 0; i < iovcnt; i++ )
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{
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iov[i].iov_base = va_arg( arg_ptr, void * );
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iov[i].iov_len = va_arg( arg_ptr, int );
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}
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va_end( arg_ptr );
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return( ::readv( rd, iov, iovcnt ) );
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}
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int CommsBase::WriteV( int iovcnt, /* const void *, int, */ ... )
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{
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va_list arg_ptr;
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//struct iovec iov[iovcnt];
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struct iovec *iov = (struct iovec *)alloca( sizeof(struct iovec)*iovcnt );
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va_start( arg_ptr, iovcnt );
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for ( int i = 0; i < iovcnt; i++ )
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{
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iov[i].iov_base = va_arg( arg_ptr, void * );
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iov[i].iov_len = va_arg( arg_ptr, int );
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}
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va_end( arg_ptr );
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return( ::writev( wd, iov, iovcnt ) );
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}
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bool Pipe::Open()
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{
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if ( pipe( fd ) < 0 )
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{
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Error(( "pipe(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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return( true );
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}
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bool Pipe::Close()
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{
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if ( fd[0] > -1 ) close( fd[0] );
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fd[0] = -1;
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if ( fd[1] > -1 ) close( fd[1] );
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fd[1] = -1;
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return( true );
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}
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bool Pipe::SetBlocking( bool blocking )
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{
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int flags;
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/* Now set it for non-blocking I/O */
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if ( (flags = fcntl( fd[1], F_GETFL )) < 0 )
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{
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Error(( "fcntl(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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if ( blocking )
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{
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flags &= ~O_NONBLOCK;
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}
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else
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{
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flags |= O_NONBLOCK;
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}
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if ( fcntl( fd[1], F_SETFL, flags ) < 0 )
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{
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Error(( "fcntl(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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return( true );
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}
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bool SocketBase::Socket()
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{
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if ( (sd = ::socket( AF_INET, SOCK_STREAM, 0 ) ) < 0 )
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{
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Error(( "socket(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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int val = 1;
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(void)::setsockopt( sd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val) );
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(void)::setsockopt( sd, SOL_SOCKET, SO_KEEPALIVE, &val, sizeof(val) );
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return( true );
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}
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bool SocketBase::Close()
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{
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if ( sd > -1 ) close( sd );
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sd = -1;
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return( true );
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}
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int SocketBase::BytesToRead() const
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{
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int bytes_to_read = 0;
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if ( ioctl( sd, FIONREAD, &bytes_to_read ) < 0 )
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{
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Error(( "ioctl(), errno = %d, error = %s", errno, strerror(errno) ));
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return( -1 );
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}
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return( bytes_to_read );
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}
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bool SocketBase::GetBlocking( bool &blocking )
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{
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int flags;
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if ( (flags = fcntl( sd, F_GETFL )) < 0 )
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{
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Error(( "fcntl(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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blocking = (flags & O_NONBLOCK);
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return( true );
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}
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bool SocketBase::SetBlocking( bool blocking )
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{
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#if 0
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// ioctl is apparently not recommended
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int ioctl_arg = !blocking;
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if ( ioctl( sd, FIONBIO, &ioctl_arg ) < 0 )
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{
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Error(( "ioctl(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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return( true );
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#endif
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int flags;
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/* Now set it for non-blocking I/O */
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if ( (flags = fcntl( sd, F_GETFL )) < 0 )
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{
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Error(( "fcntl(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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if ( blocking )
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{
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flags &= ~O_NONBLOCK;
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}
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else
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{
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flags |= O_NONBLOCK;
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}
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if ( fcntl( sd, F_SETFL, flags ) < 0 )
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{
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Error(( "fcntl(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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return( true );
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}
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bool SocketBase::GetSendBufferSize( int &buffersize ) const
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{
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socklen_t optlen = sizeof(buffersize);
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if ( getsockopt( sd, SOL_SOCKET, SO_SNDBUF, &buffersize, &optlen ) < 0 )
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{
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Error(( "getsockopt(), errno = %d, error = %s", errno, strerror(errno) ));
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return( -1 );
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}
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return( buffersize );
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}
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bool SocketBase::GetRecvBufferSize( int &buffersize ) const
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{
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socklen_t optlen = sizeof(buffersize);
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if ( getsockopt( sd, SOL_SOCKET, SO_RCVBUF, &buffersize, &optlen ) < 0 )
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{
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Error(( "getsockopt(), errno = %d, error = %s", errno, strerror(errno) ));
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return( -1 );
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}
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return( buffersize );
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}
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bool SocketBase::SetSendBufferSize( int buffersize )
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{
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if ( setsockopt( sd, SOL_SOCKET, SO_SNDBUF, (char *)&buffersize, sizeof(buffersize)) < 0 )
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{
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Error(( "setsockopt(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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return( true );
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}
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bool SocketBase::SetRecvBufferSize( int buffersize )
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{
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if ( setsockopt( sd, SOL_SOCKET, SO_RCVBUF, (char *)&buffersize, sizeof(buffersize)) < 0 )
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{
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Error(( "setsockopt(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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return( true );
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}
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bool SocketBase::GetRouting( bool &route ) const
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{
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int dontroute;
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socklen_t optlen = sizeof(dontroute);
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if ( getsockopt( sd, SOL_SOCKET, SO_DONTROUTE, &dontroute, &optlen ) < 0 )
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{
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Error(( "getsockopt(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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route = !dontroute;
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return( true );
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}
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bool SocketBase::SetRouting( bool route )
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{
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int dontroute = !route;
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if ( setsockopt( sd, SOL_SOCKET, SO_DONTROUTE, (char *)&dontroute, sizeof(dontroute)) < 0 )
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{
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Error(( "setsockopt(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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return( true );
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}
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bool SocketBase::GetNoDelay( bool &nodelay ) const
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{
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int int_nodelay;
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socklen_t optlen = sizeof(int_nodelay);
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if ( getsockopt( sd, IPPROTO_TCP, TCP_NODELAY, &int_nodelay, &optlen ) < 0 )
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{
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Error(( "getsockopt(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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nodelay = int_nodelay;
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return( true );
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}
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bool SocketBase::SetNoDelay( bool nodelay )
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{
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int int_nodelay = nodelay;
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if ( setsockopt( sd, IPPROTO_TCP, TCP_NODELAY, (char *)&int_nodelay, sizeof(int_nodelay)) < 0 )
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{
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Error(( "setsockopt(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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return( true );
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}
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bool SocketClient::SetupRemoteHost( const char *host )
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{
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struct hostent *p_rem_host=0;
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if ( !(p_rem_host = ::gethostbyname( host ) ) )
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{
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Error(( "gethostbyname( %s ), h_errno = %d", host, h_errno ));
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return( false );
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}
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memcpy( &rem_host, p_rem_host, sizeof(rem_host) );
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return( true );
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}
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bool SocketClient::SetupRemoteServ( const char *serv, const char *protocol )
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{
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struct servent *p_rem_serv=0;
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if ( !(p_rem_serv = ::getservbyname( serv, protocol ) ) )
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{
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Error(( "getservbyname( %s ), errno = %d, error = %s", serv, errno, strerror(errno) ));
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return( false );
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}
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memcpy( &rem_serv, p_rem_serv, sizeof(rem_serv) );
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return( true );
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}
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SocketClient::SocketClient()
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{
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memset( &rem_host, 0, sizeof(rem_host) );
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memset( &rem_serv, 0, sizeof(rem_serv) );
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}
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bool SocketClient::Open()
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{
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if ( !Socket() )
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return( false );
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struct sockaddr_in rem_addr;
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memset( &rem_addr, 0, sizeof(rem_addr) );
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rem_addr.sin_port = rem_serv.s_port;
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rem_addr.sin_family = AF_INET;
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rem_addr.sin_addr.s_addr = ((struct in_addr *)(rem_host.h_addr))->s_addr;
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if ( ::connect( sd, (struct sockaddr *)&rem_addr, sizeof(rem_addr) ) == -1 )
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{
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Error(( "connect(), errno = %d, error = %s", errno, strerror(errno) ));
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Close();
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return( false );
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}
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return( true );
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}
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bool UDPSocket::Socket()
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{
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if ( (sd = ::socket( AF_INET, SOCK_DGRAM, 0 ) ) < 0 )
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{
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Error(( "socket(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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return( true );
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}
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bool UDPSocket::Initialise( const char *host, const char *service )
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{
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if ( !SetupRemoteHost( host ) )
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return( false );
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if ( !SetupRemoteServ( service, "udp" ) )
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return( false );
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if ( !Terminate() )
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return( false );
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return( true );
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}
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TCPClient::TCPClient()
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{
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state = DISCONNECTED;
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}
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bool TCPClient::Initialise( const char *host, const char *service )
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{
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state = DISCONNECTED;
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if ( !SetupRemoteHost( host ) )
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return( false );
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if ( !SetupRemoteServ( service, "tcp" ) )
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return( false );
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if ( !Terminate() )
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return( false );
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return( true );
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}
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bool TCPClient::Open()
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{
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if ( !SocketClient::Open() )
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return( false );
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state = CONNECTED;
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return( true );
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}
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bool TCPClient::Close()
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{
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if ( !SocketClient::Close() )
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return( false );
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state = DISCONNECTED;
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return( true );
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}
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bool TCPServer::SetupLocalHost()
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{
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char host[MAXHOSTNAMELEN];
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if ( ::gethostname( host, sizeof(host) ) == -1 )
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{
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Error(( "gethostname(), errno = %d, error = %s", errno, strerror(errno) ));
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return( false );
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}
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struct hostent *p_loc_host=0;
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if ( !(p_loc_host = ::gethostbyname( host ) ) )
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{
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Error(( "gethostbyname( %s ), h_errno = %d", host, h_errno ));
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return( false );
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}
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memcpy( &loc_host, p_loc_host, sizeof(loc_host) );
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return( true );
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}
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bool TCPServer::SetupLocalServ( const char *serv )
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{
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struct servent *p_loc_serv=0;
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if ( !(p_loc_serv = ::getservbyname( serv, "tcp" ) ) )
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{
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Error(( "getservbyname( %s ), errno = %d, error = %s", serv, errno, strerror(errno) ));
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return( false );
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}
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memcpy( &loc_serv, p_loc_serv, sizeof(loc_serv) );
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return( true );
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}
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TCPServer::TCPServer()
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{
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state = DISCONNECTED;
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memset( &loc_host, 0, sizeof(loc_host) );
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memset( &loc_serv, 0, sizeof(loc_serv) );
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}
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TCPServer::TCPServer( const TCPServer &server, int new_sd )
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{
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state = server.state;
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memcpy( &loc_host, &server.loc_host, sizeof(loc_host) );
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memcpy( &loc_serv, &server.loc_serv, sizeof(loc_serv) );
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sd = new_sd;
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}
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bool TCPServer::Initialise( const char *service )
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{
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state = DISCONNECTED;
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if ( !SetupLocalHost() )
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return( false );
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if ( !SetupLocalServ( service ) )
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return( false );
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if ( !Terminate() )
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return( false );
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return( true );
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}
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bool TCPServer::Open()
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{
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if ( !Socket() )
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return( false );
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struct sockaddr_in loc_addr;
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memset( &loc_addr, 0, sizeof(loc_addr) );
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loc_addr.sin_port = loc_serv.s_port;
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loc_addr.sin_family = AF_INET;
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loc_addr.sin_addr.s_addr = INADDR_ANY;
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if ( ::bind( sd, (struct sockaddr *)&loc_addr, sizeof(loc_addr) ) == -1 )
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{
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Error(( "bind(), errno = %d, error = %s", errno, strerror(errno) ));
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Close();
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return( false );
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}
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if ( ::listen( sd, SOMAXCONN ) == -1 )
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{
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Error(( "listen(), errno = %d, error = %s", errno, strerror(errno) ));
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Close();
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return( false );
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}
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state = LISTENING;
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return( true );
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}
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bool TCPServer::Accept()
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{
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struct sockaddr_in rem_addr;
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socklen_t rem_addr_size = sizeof(rem_addr);
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memset( &rem_addr, 0, sizeof(rem_addr) );
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int new_sd=-1;
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if ( (new_sd = accept( sd, (struct sockaddr *)&rem_addr, &rem_addr_size )) == -1 )
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{
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Error(( "accept(), errno = %d, error = %s", errno, strerror(errno) ));
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Close();
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return( false );
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}
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close( sd );
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sd = new_sd;
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state = CONNECTED;
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return( true );
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}
|
|
|
|
bool TCPServer::Accept( TCPServer *&server )
|
|
{
|
|
struct sockaddr_in rem_addr;
|
|
socklen_t rem_addr_size = sizeof(rem_addr);
|
|
|
|
memset( &rem_addr, 0, sizeof(rem_addr) );
|
|
|
|
int new_sd=-1;
|
|
|
|
if ( (new_sd = accept( sd, (struct sockaddr *)&rem_addr, &rem_addr_size )) == -1 )
|
|
{
|
|
Error(( "connect(), errno = %d, error = %s", errno, strerror(errno) ));
|
|
Close();
|
|
return( false );
|
|
}
|
|
|
|
server = new TCPServer( *this, new_sd );
|
|
|
|
return( true );
|
|
}
|
|
|
|
bool TCPServer::Close()
|
|
{
|
|
if ( !SocketBase::Close() )
|
|
return( false );
|
|
|
|
state = DISCONNECTED;
|
|
|
|
return( true );
|
|
}
|
|
|