DNS client API. More...

#include <tinyara/config.h>
#include <tinyara/compiler.h>
#include <inttypes.h>
#include <netinet/in.h>
#include <sys/socket.h>

Include dependency graph for netdb.h:

Macros
#define	IPPORT_RESERVED 0xffff /* No reserved port numbers */

#define	AI_PASSIVE (1 << 0)

#define	AI_CANONNAME (1 << 1)

#define	AI_NUMERICHOST (1 << 2)

#define	AI_NUMERICSERV (1 << 3)

#define	AI_V4MAPPED (1 << 4)

#define	AI_ALL (1 << 5)

#define	AI_ADDRCONFIG (1 << 6)

#define	NI_NOFQDN (1 << 0)

#define	NI_NUMERICHOST (1 << 1)

#define	NI_NAMEREQD (1 << 2)

#define	NI_NUMERICSERV (1 << 3)

#define	NI_NUMERICSCOPE (1 << 4)

#define	NI_DGRAM (1 << 5)

#define	HOST_NOT_FOUND 1

#define	NO_DATA 2

#define	NO_RECOVERY 3

#define	TRY_AGAIN 4

#define	EAI_AGAIN 1

#define	EAI_BADFLAGS 2

#define	EAI_FAMILY 3

#define	EAI_MEMORY 4

#define	EAI_NONAME 5

#define	EAI_SERVICE 6

#define	EAI_SOCKTYPE 7

#define	EAI_SYSTEM 8

#define	EAI_OVERFLOW 9

#define	EAI_FAIL -1

#define	HOST_NOT_FOUND 1

#define	NO_DATA 2

#define	NO_RECOVERY 3

#define	TRY_AGAIN 4

#define	_PATH_SERVICES "/etc/services"

#define	h_addr h_addr_list[0] /* For backward compatibility */

#define	EXTERN extern

Functions
int	getaddrinfo (const char host, const char service, const struct addrinfo hints, struct addrinfo *res)
	getaddrinfo() is a function that returns information on a particular host name (such as its IP address) and loads up a struct sockaddr. More...

void	freeaddrinfo (FAR struct addrinfo *ai)
	freeaddrinfo() frees the memory allocated by the getaddrinfo() function. More...

FAR struct hostent *	gethostbyaddr (FAR const void *addr, socklen_t len, int type)
	gethostbyaddr() is the function returns a corresponding hostname with given IP addresses More...

FAR struct hostent *	gethostbyname (FAR const char *name)
	gethostbyname() is the function sending DNS query to DNS server with hostname More...

Detailed Description

DNS client API.

Definition in file netdb.h.

Data Structures