FBB::GetHostent objects produce hostent structs which may
be used by other types of objects. The FBB::GetHostent class is therefore
primarily used as a base-class for other classes and is seldomly used
`stand-alone'. The hostent structs are static structs, but a
non-static copy may be obtained using an FBB::Hostent object.
A hostent struct 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. These binary
values may be converted to character-representations by the
addressToString() member, which uses inet_ntop(), internally.
NAMESPACE
FBB
All constructors, members, operators and manipulators, mentioned in this
man-page, are defined in the namespace FBB.
INHERITS FROM
-
CONSTRUCTORS
All members of the class FBB::GetHostent are static. Consequently,
there is no need to construct a FBB::GetHostent object. However, the
default- and copy-constructors are available.
STATIC MEMBERS
hostent const *gethostent(char const *errorprefix,
std::string const &nameOrAddress):
The gethostent() member returns a pointer to a static struct
hostent. It contains the information about the host whose name or dotted
decimal address was provided as its second argument. Its first argument is an
error string prefix, prefixing the error message in an FBB::Exception
object. Such an object is thrown as an exception when the host's information
could not be retrieved.
std::string addressToString(char const *errorprefix,
void const *ads):
This member returns the dotted decimal address of the host whose
binary address is provided at ads. Its first argument is an error string
prefix, prefixing the error message in an FBB::Exception object. Such an
object is thrown as an exception when the dotted decimal address could not be
determined.
The class' members can only be used when the host whose name or address is
searched can be resolved by a name resolution process, e.g., bind(1).