netdb.h File Reference

POSIX network database operations (<netdb.h>) More...

#include <zephyr/net/socket.h>

Include dependency graph for netdb.h:

Go to the source code of this file.

Data Structures
struct	hostent
	Host entry returned by gethostbyname() (legacy). More...
struct	netent
	Network entry returned by getnetbyname() (legacy). More...
struct	protoent
	Protocol entry returned by getprotobyname() (legacy). More...
struct	servent
	Service entry returned by getservbyname() (legacy). More...

Macros
#define	NI_MAXSERV   32
	Reasonable buffer size for getnameinfo() service names.
#define	EAI_BADFLAGS   DNS_EAI_BADFLAGS
	Flags argument to getaddrinfo() contained an invalid value.
#define	EAI_NONAME   DNS_EAI_NONAME
	The name does not resolve for the supplied parameters.
#define	EAI_AGAIN   DNS_EAI_AGAIN
	Temporary failure in name resolution.
#define	EAI_FAIL   DNS_EAI_FAIL
	Non-recoverable failure in name resolution.
#define	EAI_NODATA   DNS_EAI_NODATA
	The requested name is valid but has no address data.
#define	EAI_MEMORY   DNS_EAI_MEMORY
	Memory allocation failure.
#define	EAI_SYSTEM   DNS_EAI_SYSTEM
	A system error occurred; errno is set.
#define	EAI_SERVICE   DNS_EAI_SERVICE
	Requested service not available for the given socket type.
#define	EAI_SOCKTYPE   DNS_EAI_SOCKTYPE
	Socket type not supported.
#define	EAI_FAMILY   DNS_EAI_FAMILY
	Address family not supported.
#define	EAI_OVERFLOW   DNS_EAI_OVERFLOW
	Output buffer overflow.
#define	addrinfo   zsock_addrinfo
	Address info structure (alias for zsock_addrinfo).

Functions
void	endhostent (void)
	Close the hosts database (legacy, no-op on most systems).
void	endnetent (void)
	Close the networks database (legacy, no-op on most systems).
void	endprotoent (void)
	Close the protocols database (legacy).
void	endservent (void)
	Close the services database (legacy).
void	freeaddrinfo (struct zsock_addrinfo *ai)
	Free addrinfo list returned by getaddrinfo().
const char *	gai_strerror (int errcode)
	Return a string describing a getaddrinfo() error code.
int	getaddrinfo (const char *host, const char *service, const struct zsock_addrinfo *hints, struct zsock_addrinfo **res)
	Translate a hostname and service to a list of socket addresses.
struct hostent *	gethostent (void)
	Get the next entry from the hosts database (legacy, sequential).
int	getnameinfo (const struct sockaddr *addr, socklen_t addrlen, char *host, socklen_t hostlen, char *serv, socklen_t servlen, int flags)
	Translate a socket address to a hostname and service name.
struct netent *	getnetbyaddr (uint32_t net, int type)
	Look up a network by address (legacy).
struct netent *	getnetbyname (const char *name)
	Look up a network by name (legacy).
struct netent *	getnetent (void)
	Get the next entry from the networks database (legacy, sequential).
struct protoent *	getprotobyname (const char *name)
	Look up a protocol by name (legacy).
struct protoent *	getprotobynumber (int proto)
	Look up a protocol by number (legacy).
struct protoent *	getprotoent (void)
	Get the next entry from the protocols database (legacy, sequential).
struct servent *	getservbyname (const char *name, const char *proto)
	Look up a service by name and protocol (legacy).
struct servent *	getservbyport (int port, const char *proto)
	Look up a service by port number and protocol (legacy).
struct servent *	getservent (void)
	Get the next entry from the services database (legacy, sequential).
void	sethostent (int stayopen)
	Open the hosts database (legacy).
void	setnetent (int stayopen)
	Open the networks database (legacy).
void	setprotoent (int stayopen)
	Open the protocols database (legacy).
void	setservent (int stayopen)
	Open the services database (legacy).

Detailed Description

POSIX network database operations (<netdb.h>)

Provides hostname and service resolution (getaddrinfo/getnameinfo) and the legacy host/network/protocol/service database functions.

See also

POSIX.1-2017 <netdb.h>

Definition in file netdb.h.