resolve: Domain name resolution functions

Macros
#define	RESOLVE_OK   0
#define	RESOLVE_NOTFOUND   1
#define	RESOLVE_NOADDR   2
#define	RESOLVE_NSERROR   3
#define	RESOLVE_TEMPFAIL   4
#define	resolve_ipv4name(N, A)
#define	resolve_error()

Functions
const char *	resolve_ipv4addr (const ipv4addr *addr)
int	resolve_ipv4name_n (const char *name, ipv4addr *addr, int maxaddrs)
int	resolve_calldns (int(*dnsfn)(struct dns_result *, const void *), struct dns_result *out, const void *param)
int	resolve_qualdns (int(*dnsfn)(struct dns_transmit *, struct dns_result *out, const char *), struct dns_result *out, const char *name)

Variables
int	__resolve_error

Detailed Description

Macro Definition Documentation

resolve_error

#define resolve_error

(

)

Value:

(__resolve_error)

Look up the last resolve error code.

resolve_ipv4name

#define resolve_ipv4name	(		N,
			A )

Value:

resolve_ipv4name_n((N),(A),1)

Compatibility macro for resolve_ipv4name_n

RESOLVE_NOADDR

#define RESOLVE_NOADDR   2

Domain name exists, but has no address.

RESOLVE_NOTFOUND

#define RESOLVE_NOTFOUND   1

Domain name not found.

Referenced by resolve_calldns(), and resolve_qualdns().

RESOLVE_NSERROR

#define RESOLVE_NSERROR   3

Non-recoverable name server error.

RESOLVE_OK

#define RESOLVE_OK   0

No error.

RESOLVE_TEMPFAIL

#define RESOLVE_TEMPFAIL   4

Temporary failure.

Referenced by resolve_calldns(), and resolve_qualdns().

Function Documentation

resolve_calldns()

int resolve_calldns ( int(* dnsfn )(struct dns_result *, const void *), struct dns_result * out, const void * param )

extern

Call a dns_* function and save an error code if necessary.

References __resolve_error, dns_result::count, RESOLVE_NOTFOUND, and RESOLVE_TEMPFAIL.

Referenced by resolve_ipv4addr().

resolve_ipv4addr()

const char * resolve_ipv4addr ( const ipv4addr * addr )

extern

Look up the domain name corresponding to an IPv4 address.

References resolve_calldns(), and dns_result::rr.

resolve_ipv4name_n()

int resolve_ipv4name_n ( const char * name, ipv4addr * addr, int maxaddrs )

extern

Look up the IPv4 address(es) corresponding to a domain name.

References dns_result::count, dns_ip4_r(), resolve_qualdns(), and dns_result::rr.

resolve_qualdns()

int resolve_qualdns ( int(* dnsfn )(struct dns_transmit *, struct dns_result *out, const char *), struct dns_result * out, const char * name )

extern

Call a dns_* function using dns_qualify and save an error code if necessary.

References __resolve_error, dns_result::count, dns_qualify(), RESOLVE_NOTFOUND, RESOLVE_TEMPFAIL, and str_free().

Referenced by resolve_ipv4name_n().

Variable Documentation

__resolve_error

int __resolve_error

extern

Saved error code from last dns call.

Referenced by resolve_calldns(), and resolve_qualdns().