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FBB::Hostent(3bobcat) struct hostent wrapper FBB::Hostent(3bobcat)

NAME

FBB::Hostent - Wrapper around a struct hostent

SYNOPSIS

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

DESCRIPTION

@CLASS objects are wrappers around hostent structs which may be used by other objects. A struct hostent is defined as follows:
    struct hostent 
    {
        char    *h_name;        // official name of host 
        char    **h_aliases;    // alias list 
        int     h_addrtype;     // host address type (always AF_INET)
        int     h_length;       // length of address 
        char    **h_addr_list;  // list of addresses 
    }
        

The address fields are binary values of the addresses, each address requiring h_length bytes, the last address being equal to 0. The @CLASS objects offer a C++-like interface to this struct.

NAMESPACE

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

INHERITS FROM

-

CONSTRUCTORS

o
Hostent(hostent const *hostentPtr):
This constructor initializes an @CLASS object from an existing hostent struct. Functions like gethostbyname(3) and gethostbyaddress(3) return pointers to hostent structs.

The default, copy and move constructors are available.

MEMBER FUNCTIONS

o
size_t addressLength() const:
This member returns the length of the binary addresses in bytes.
o
size_t addressType() const:
This member returns the type of the address. Currently this is always AF_INET.
o
char const *alias(size_t index) const:
This member returns alias `index’ of the host. The first alias has index 0. If alias `index’ does not exist, 0 is returned.
o
char const * const *beginAlias() const:
This member returns an iterator to the first alias. The hostname itself is not included in the list of aliases.
o
char const *binaryAddress(size_t index) const:
This member returns the binary address `index’ of the host. The first address has index 0. If address `index’ does not exist, 0 is returned. The pointer to the binary address points to a series of addressLength() bytes. Note that the returned address is in network byte order. It can be converted to host byte order by the functions described in byteorder(3).
o
std::string dottedDecimalAddress(size_t index) const:
This member returns address `index’ as a dotted decimal address in a string. The first address has index 0. If address `index’ does not exist, an empty string is returned.
o
char const * const *endAlias() const:
This member returns an iterator pointing beyond the last alias.
o
char const *hostname() const:
This member returns the standard (first) name of the host.
o
size_t nAddresses() const:
This member returns the number of addresses that are available. When requesting a particular address, the requested index should be less than the value returned by this member.
o
size_t nAliases() const:
This member returns the number of aliases that are available. When requesting a particular alias, the requested index should be less than the value returned by this member.
o
void swap(Hostent &other):
The current Hostent object’s contents are swapped with the other object’s contents.

The overloaded assignment operator and the move-aware overloaded assignment operators are available.

EXAMPLE

    #include <iostream>
    #include <algorithm>
    #include <iterator>
    #include <bobcat/hostent>
    
    using namespace std;
    using namespace FBB;
    
    int main(int argc, char **argv)
    {
        Hostent he(gethostbyname("localhost"));
        cout << "The local hostname = " << he.hostname() << endl;
        cout << "All aliases: " << endl;
        copy(he.beginAlias(), he.endAlias(), 
                    ostream_iterator<char const *>(cout, "\n"));
        cout << "Addresses:\n";
        for (size_t idx = 0; idx < he.nAddresses(); idx++)
            cout << he.dottedDecimalAddress(idx) << endl;
    }
        

FILES

bobcat/hostent - defines the class interface

SEE ALSO

bobcat(7)

BUGS

None Reported.

DISTRIBUTION FILES

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

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