include/netdb.h File Reference

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Data Structures
struct	hostent
	Resolver host structure. More...
Defines
#define	_ABLE_CLIB_NETDB_H   1
#define	NETDB_INTERNAL   -1
	Value for h_errno meaning internal error, see errno.
#define	NETDB_SUCCESS   0
	Value for h_errno meaning success.
#define	HOST_NOT_FOUND   1
	Value for h_errno meaning 'host not found'.
#define	TRY_AGAIN   2
	Value for h_errno meaning 'non-authoritative failure'.
#define	NO_RECOVERY   3
	Value for h_errno meaning 'unrecoverable error'.
#define	NO_DATA   4
	Value for h_errno meaning 'no data of requested type found'.
#define	NO_ADDRESS   NO_DATA
#define	h_addr   h_addr_list[0]
#define	sethostent(stayopen)
#define	endhostent()
Functions
struct hostent *	gethostbyname (const char *name)
	Look up a host by name and return a hostent structure.
struct hostent *	gethostbyaddr (const void *addr, socklen_t len, int type)
	Look up a host by address and return a hostent structure.
void	herror (const char *s)
	Print the error in h_errno to stderr.
const char *	hstrerror (int err)
	Return a pointer to a static string representing err.
Variables
int	h_errno
	Equivalent of errno for gethostbyname etc.

---

Define Documentation

#define _ABLE_CLIB_NETDB_H   1

 

#define endhostent

(

)

#define h_addr   h_addr_list[0]

#define HOST_NOT_FOUND   1

Value for h_errno meaning 'host not found'.

#define NETDB_INTERNAL   -1

Value for h_errno meaning internal error, see errno.

#define NETDB_SUCCESS   0

Value for h_errno meaning success.

#define NO_ADDRESS   NO_DATA

See also:

NO_DATA

#define NO_DATA   4

Value for h_errno meaning 'no data of requested type found'.

#define NO_RECOVERY   3

Value for h_errno meaning 'unrecoverable error'.

#define sethostent

(

stayopen

)

#define TRY_AGAIN   2

Value for h_errno meaning 'non-authoritative failure'.

---

Function Documentation

struct hostent* gethostbyaddr	(	const void *	addr,
		socklen_t	len,
		int	type
	)			[read]

Look up a host by address and return a hostent structure.

Parameters:

	addr	The address to look up.
	len	The length of the address to look up.
	type	The type (E.g. AF_INET) of the address to look up.

Returns:

A pointer to a static host structure which will remain valid only until the next call to this or gethostbyname.

struct hostent* gethostbyname

(

const char *

name

)

[read]

Look up a host by name and return a hostent structure.

Parameters:

name

The DNS name to lookup.

Returns:

A pointer to a static host structure which will remain valid only until the next call to this or gethostbyaddr.

void herror

(

const char *

s

)

Print the error in h_errno to stderr.

const char* hstrerror

(

int

err

)

Return a pointer to a static string representing err.

---

Variable Documentation

int h_errno

Equivalent of errno for gethostbyname etc.