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 gethostbyad-
dress(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 net-
work 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, "
"));
cout << "Addresses:
";
for (size_t idx = 0; idx < he.nAddresses(); idx++)
cout << he.dottedDecimalAddress(idx) << endl;
return 0;
}
FILES
bobcat/hostent - defines the class interface
SEE ALSO
bobcat(7)
BUGS
None Reported.
DISTRIBUTION FILES
o bobcat_3.01.00-x.dsc: detached signature;
o bobcat_3.01.00-x.tar.gz: source archive;
o bobcat_3.01.00-x_i386.changes: change log;
o libbobcat1_3.01.00-x_*.deb: debian package holding the libraries;
o libbobcat1-dev_3.01.00-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).
libbobcat1-dev_3.01.00-x.tar.gz 2005-2012 FBB::Hostent(3bobcat)