DOKK / manpages / debian 10 / libbobcat-dev / clientsocket.3bobcat.en
FBB::ClientSocket(3bobcat) Client Socket FBB::ClientSocket(3bobcat)

FBB::ClientSocket - Client Socket connecting to a Server in the Internet

#include <bobcat/clientsocket>
Linking option: -lbobcat

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.

FBB
All constructors, members, operators and manipulators, mentioned in this man-page, are defined in the namespace FBB.

FBB::SocketBase

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. The copy constructor is not available.

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.

See also the serversocket(3bobcat) example.


#include <iostream>
#include <bobcat/clientsocket>
#include <bobcat/ifdstream>
#include <bobcat/ofdstream>
#include <bobcat/a2x>

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 = A2x(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;
}

bobcat/clientsocket - defines the class interface

bobcat(7), ifdstream(3bobcat), ifdstreambuf(3bobcat), inetaddress(3bobcat), localclientsocket(3bobcat), ofdstream(3bobcat), ofdstream(3bobcat), serversocket(3bobcat), socketbase(3bobcat)

None Reported.

bobcat_4.08.06-x.dsc: detached signature;
bobcat_4.08.06-x.tar.gz: source archive;
bobcat_4.08.06-x_i386.changes: change log;
libbobcat1_4.08.06-x_*.deb: debian package holding the libraries;
libbobcat1-dev_4.08.06-x_*.deb: debian package holding the libraries, headers and manual pages;
http://sourceforge.net/projects/bobcat: public archive location;

Bobcat is an acronym of `Brokken’s Own Base Classes And Templates’.

This is free software, distributed under the terms of the GNU General Public License (GPL).

Frank B. Brokken (f.b.brokken@rug.nl).

2005-2018 libbobcat-dev_4.08.06-x.tar.gz