FBB::ClientSocket(3bobcat)
Client Socket
(libbobcat-dev_6.06.02)
2005-2024
NAME
FBB::ClientSocket - Client Socket connecting to a Server in the Internet
SYNOPSIS
    #include <bobcat/clientsocket>
    Linking option: -lbobcat
DESCRIPTION
    An FBB::ClientSocket may be constructed to connect to some server
process in the internet. The socket made available by the FBB:ClientSocket
may be used to initialize a std::istream and/or std::ostream. The
std::istream is used to read information from the server process to which
the FBB::ClientSocket connects, The std::ostream is used to send
information to the server process to which the FBB::ClientSocket connects.
Since a socket may be considered a file descriptor the available
FBB::IFdStream, FBB::IFdStreamBuf, FBB::OFdStream, and
FBB::OFdStreamBuf classes may be used profitably here. Note that having
available a socket does not mean that this defines the communication
protocol. It is (still) the responsibility of the programmer to comply with an
existing protocol or to implement a tailor-made protocol. The latter situation
implies that the sequence of input- and output operations is defined by the
programmer.
A Unix Domain client socket can be defined using
FBB::LocalClientSocket.
NAMESPACE
    FBB
    All constructors, members, operators and manipulators, mentioned in this
man-page, are defined in the namespace FBB.
INHERITS FROM
    FBB::SocketBase
CONSTRUCTOR
    
    -  ClientSocket(std::string const &host, uint16_t port):
 This constructor initializes an FBB::ClientSocket object,
preparing it for a connection to the specified port at the given host.  An
FBB::Exception is thrown if the socket could not be constructed. The
construction of the socket does not mean that a connection has actually been
established. In order to connect to the server, the member connect() (see
below) should be used.
Copy and move constructors (and assignment operators) are not available.
MEMBER FUNCTIONS
     All members of FBB::SocketBase (and thus of FBB::InetAddress) are
available, as FBB::ClientSocket inherits from these classes.
    
    -  int connect():
 This member returns a socket that can be used to communicate with the
server process. An FBB::Exception exception is thrown if the connection
could not be established or if the SocketBase base class could not
properly be constructed.
EXAMPLE
    See also the serversocket(3bobcat) example.
        
    #include <iostream>
    #include <string>
    #include <bobcat/clientsocket>
    #include <bobcat/ifdstream>
    #include <bobcat/ofdstream>
    using namespace std;
    using namespace FBB;
    int main(int argc, char **argv)
    try
    {
        if (argc == 1)
        {
            cerr << "Provide servername and port number\n";
            return 1;
        }
        size_t     port = stoul(argv[2]);
        ClientSocket client(argv[1], port);
        int fd = client.connect();
        string line;
        cout << "Connecting to socket " << fd << endl <<
                "address = " << client.dottedDecimalAddress() << ", " <<
                                                                 endl <<
                "communication through port " << client.port() << endl;
        IFdStream in(fd);                 // stream to read from
        OFdStream out(fd);                // stream to write to
        while (true)
        {
                                    // Ask for a textline, stop if
            cout << "? ";           // empty / none
            if (!getline(cin, line) || line.length() == 0)
                return 0;
            cout << "Line read: " << line << endl;
                                    // Return the line to the server
            out << line.c_str() << endl;
            cout << "wrote line\n";
            getline(in, line);      // Wait for a reply from the server
            cout << "Answer: " << line << endl;
        }
    }
    catch (Exception const &err)
    {
        cerr << err.what() << "\n" <<
                "Can't connect to " << argv[1] << ", port " <<
                argv[2] << endl;
        return 1;
    }
        
FILES
    bobcat/clientsocket - defines the class interface
SEE ALSO
    bobcat(7), ifdstream(3bobcat), ifdbuf(3bobcat),
inetaddress(3bobcat), localclientsocket(3bobcat),
ofdstream(3bobcat), ofdstream(3bobcat), serversocket(3bobcat),
socketbase(3bobcat)
BUGS
    None Reported.
BOBCAT PROJECT FILES
    -  https://fbb-git.gitlab.io/bobcat/: gitlab project page;
    
-  bobcat_6.06.02-x.dsc: detached signature;
    
-  bobcat_6.06.02-x.tar.gz: source archive;
    
-  bobcat_6.06.02-x_i386.changes: change log;
    
-  libbobcat1_6.06.02-x_*.deb: debian package containing the
            libraries;
    
-  libbobcat1-dev_6.06.02-x_*.deb: debian package containing the
            libraries, headers and manual pages;
    
BOBCAT
    Bobcat is an acronym of `Brokken's Own Base Classes And Templates'.
COPYRIGHT
    This is free software, distributed under the terms of the
    GNU General Public License (GPL).
AUTHOR
    Frank B. Brokken (f.b.brokken@rug.nl).