lwres_getnameinfo — lightweight resolver socket address structure to hostname and service name
||const struct sockaddr *sa,|
This function is equivalent to the
function defined in RFC2133.
lwres_getnameinfo() returns the
hostname for the
salen bytes long. The hostname is of
hostlen and is returned via
*host. The maximum length of the
The name of the service associated with the port number in
sa is returned in
servlen bytes long. The
of the service name is
NI_MAXSERV - 32
flags argument sets the
A fully qualified domain name is not required for local hosts. The local part of the fully qualified domain name is returned instead.
Return the address in numeric form, as if calling inet_ntop(), instead of a host name.
A name is required. If the hostname cannot be found in the DNS and this flag is set, a non-zero error code is returned. If the hostname is not found and the flag is not set, the address is returned in numeric form.
The service name is returned as a digit string representing the port number.
Specifies that the service being looked up is a datagram service, and causes getservbyport() to be called with a second argument of "udp" instead of its default of "tcp". This is required for the few ports (512-514) that have different services for UDP and TCP.
RFC2133 , getservbyport(3) , lwres(3) , lwres_getnameinfo(3) , lwres_getnamebyaddr(3) . lwres_net_ntop(3) .