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)   resolve_ipv4name_n((N),(A),1)
#define	resolve_error()   (__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 *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

(

)

(__resolve_error)

Look up the last resolve error code.

resolve_ipv4name

#define resolve_ipv4name	(		N,
			A
	)		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 *	out,
		const void *	param
	)

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

)

Look up the domain name corresponding to an IPv4 address.

References dns_name4(), ipv4_format(), obuf_putf(), outbuf, resolve_calldns(), and dns_result::rr.

resolve_ipv4name_n()

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

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

References dns_result::count, DNS_C_IN, dns_ip4_r(), DNS_T_A, DNS_T_NS, ipv4_format(), obuf_putf(), outbuf, resolve_qualdns(), and dns_result::rr.

resolve_qualdns()

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

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

Saved error code from last dns call.

Referenced by resolve_calldns(), and resolve_qualdns().