Query: lwres_getnameinfo
OS: redhat
Section: 3
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
LWRES_GETNAMEINFO(3) LWRES_GETNAMEINFO(3)NAMElwres_getnameinfo - lightweight resolver socket address structure to hostname and service nameSYNOPSIS#include <lwres/netdb.h> int lwres_getnameinfo(const struct sockaddr *sa, size_t salen, char *host, size_t hostlen, char *serv, size_t servlen, int flags); .SH "DESCRIPTION" This function is equivalent to the getnameinfo(3) function defined in RFC2133. lwres_getnameinfo() returns the hostname for the struct sockaddr sa which is salen bytes long. The hostname is of length hostlen and is returned via *host. The maximum length of the hostname is 1025 bytes: NI_MAXHOST. The name of the service associated with the port number in sa is returned in *serv. It is servlen bytes long. The maximum length of the service name is NI_MAXSERV - 32 bytes. The flags argument sets the following bits: NI_NOFQDN A fully qualified domain name is not required for local hosts. The local part of the fully qualified domain name is returned instead. NI_NUMERICHOST Return the address in numeric form, as if calling inet_ntop(), instead of a host name. NI_NAMEREQD 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. NI_NUMERICSERV The service name is returned as a digit string representing the port number. NI_DGRAM 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.RETURN VALUESlwres_getnameinfo() returns 0 on success or a non-zero error code if an error occurs.SEE ALSORFC2133, getservbyport(3), lwres(3), lwres_getnameinfo(3), lwres_getnamebyaddr(3). lwres_net_ntop(3).BUGSRFC2133 fails to define what the nonzero return values of getnameinfo(3) are. BIND9 Jun 30, 2000 LWRES_GETNAMEINFO(3)
Related Man Pages |
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lwres_getnameinfo(3) - debian |
lwres_getnameinfo(3) - centos |
getnameinfo(3) - osx |
getnameinfo(3) - minix |
getnameinfo(3) - opendarwin |
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