FBB::Hostent - Wrapper around a struct hostent
#include <bobcat/hostent>
Linking option: -lbobcat
@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.
FBB
All constructors, members, operators and manipulators, mentioned in this
man-page, are defined in the namespace FBB.
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- 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.
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- size_t addressLength() const:
This member returns the length of the binary addresses in bytes.
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- size_t addressType() const:
This member returns the type of the address. Currently this is always
AF_INET.
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- 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.
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- 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.
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- 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).
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- 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.
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- char const * const *endAlias() const:
This member returns an iterator pointing beyond the last alias.
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- char const *hostname() const:
This member returns the standard (first) name of the host.
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- 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.
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- 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.
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- 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.
#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;
}
bobcat/hostent - defines the class interface
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- bobcat_4.08.06-x.dsc: detached signature;
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- bobcat_4.08.06-x.tar.gz: source archive;
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- bobcat_4.08.06-x_i386.changes: change log;
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- libbobcat1_4.08.06-x_*.deb: debian package holding the
libraries;
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- libbobcat1-dev_4.08.06-x_*.deb: debian package holding the
libraries, headers and manual pages;
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- 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).