dnsresolv.h File Reference

#include "stralloc.h"
#include "iopause.h"
#include "taia.h"

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Data Structures
struct	dns_transmit

Macros
#define	DNS_NXD   0 /* NXDOMAIN, NODATA */
#define	DNS_MEM   -1 /* out of memory; fatal */
#define	DNS_ERR   -2 /* parsing errors and others */
#define	DNS_COM   -3 /* (socket) communication errors: SERVFAIL */
#define	DNS_INT   -4 /* internal errors */
#define	DNS_SOFT   -5 /* DNS_ERR or DNS_COM */
#define	DNS_HARD   -6 /* DNS loop problem */
#define	MSGSIZE   MTUSIZE /* todays default */
#define	MAXMSGSIZE   4096 /* 4069 seen with EDNS0 */
#define	MAXSEGMENT   65535 /* Max TCP buffer size */
#define	QUERY_MAXNS   32 /* 16 IPv4 + 16 IPv6 NS */
#define	QUERY_MAXIPLEN   512 /* QUERY_MAXNS * 16 */
#define	DNS_C_IN   "\0\1"
#define	DNS_C_ANY   "\0\377"
#define	DNS_T_A   "\0\1"
#define	DNS_T_NS   "\0\2"
#define	DNS_T_CNAME   "\0\5"
#define	DNS_T_SOA   "\0\6"
#define	DNS_T_PTR   "\0\14"
#define	DNS_T_HINFO   "\0\15"
#define	DNS_T_MX   "\0\17"
#define	DNS_T_TXT   "\0\20"
#define	DNS_T_RP   "\0\21"
#define	DNS_T_SIG   "\0\30"
#define	DNS_T_KEY   "\0\31"
#define	DNS_T_AAAA   "\0\34"
#define	DNS_T_SRV   "\0\41"
#define	DNS_T_NAPTR   "\0\43"
#define	DNS_T_CERT   "\0\45"
#define	DNS_T_OPT   "\0\51"
#define	DNS_T_DS   "\0\53"
#define	DNS_T_SSHFP   "\0\54"
#define	DNS_T_IPSECKEY   "\0\55"
#define	DNS_T_RRSIG   "\0\56"
#define	DNS_T_NSEC   "\0\57"
#define	DNS_T_DNSKEY   "\0\60"
#define	DNS_T_NSEC3   "\0\62"
#define	DNS_T_NSEC3PARAM   "\0\63"
#define	DNS_T_TLSA   "\0\64"
#define	DNS_T_HIP   "\0\67"
#define	DNS_T_OPENPGPKEY   "\0\75"
#define	DNS_T_SPF   "\0\143"
#define	DNS_T_AXFR   "\0\374"
#define	DNS_T_ANY   "\0\377"
#define	DNS_T_CAA   "\1\1"
#define	LOCALHOST   "localhost" /* no clear distinction IPv4/IPv6 */
#define	IP4_LOOPBACK   "ip4-loopback"
#define	IP6_LOOPBACK   "ip6-loopback"
#define	DNS_NAME4_DOMAIN   31
#define	DNS_NAME6_DOMAIN   (4*16+11)

Functions
void	dns_random_init (const char *)
unsigned int	dns_random (unsigned int)
void	dns_domain_free (char **)
int	dns_domain_copy (char **, const char *)
unsigned int	dns_domain_length (const char *)
int	dns_domain_equal (const char *, const char *)
int	dns_domain_suffix (const char *, const char *)
unsigned int	dns_domain_suffixpos (const char *, const char *)
int	dns_domain_fromdot (char **, const char *, unsigned int)
int	dns_domain_todot_cat (stralloc *, const char *)
int	dns_ip_qualify (stralloc *, stralloc *, const stralloc *)
int	dns_ip_qualify_rules (stralloc *, stralloc *, const stralloc *, const stralloc *)
int	dns_ip_qualify_localhost (stralloc *, stralloc *, const stralloc *)
unsigned int	dns_packet_copy (const char *, unsigned int, unsigned int, char *, unsigned int)
unsigned int	dns_packet_getname (const char *, unsigned int, unsigned int, char **)
unsigned int	dns_packet_skipname (const char *, unsigned int, unsigned int)
int	dns_transmit_start (struct dns_transmit *, const char *, int, const char *, const char *, const char *)
void	dns_transmit_free (struct dns_transmit *)
void	dns_transmit_io (struct dns_transmit *, iopause_fd *, struct taia *)
int	dns_transmit_get (struct dns_transmit *, const iopause_fd *, const struct taia *)
int	dns_resolvconfip (char *, uint32 *)
int	dns_resolvconfrewrite (stralloc *)
int	dns_resolve (const char *, const char *)
int	dns_name (stralloc *, const char *)
int	dns_name_packet (stralloc *, const char *, unsigned int)
int	dns_txt_packet (stralloc *, const char *, unsigned int)
int	dns_txt (stralloc *, const stralloc *)
int	dns_mx_packet (stralloc *, const char *, unsigned int)
int	dns_mx (stralloc *, const stralloc *)
int	dns_ip4_packet (stralloc *, const char *, unsigned int)
int	dns_ip4 (stralloc *, stralloc *)
void	dns_sortip4 (char *, unsigned int)
int	dns_ip4_qualify_rules (stralloc *, stralloc *, const stralloc *, const stralloc *)
int	dns_ip4_qualify (stralloc *, stralloc *, const stralloc *)
int	dns_name4_domain (char *, const char *)
int	dns_name4 (stralloc *, const char *)
int	randombind4 (struct dns_transmit *)
int	dns_ip6_packet (stralloc *, const char *, unsigned int)
int	dns_ip6 (stralloc *, stralloc *)
void	dns_sortip6 (char *, unsigned int)
int	dns_ip6_qualify_rules (stralloc *, stralloc *, const stralloc *, const stralloc *)
int	dns_ip6_qualify (stralloc *, stralloc *, const stralloc *)
int	dns_name6_domain (char *, const char *)
int	dns_name6 (stralloc *, const char *)
int	dns_cname_packet (stralloc *, const char *, unsigned int)
int	dns_cname (stralloc *, stralloc *)
int	dns_transmit_start6 (struct dns_transmit *, const char *, int, const char *, const char *, const char *, const uint32 *)
int	randombind6 (struct dns_transmit *)
void	socketfree (struct dns_transmit *)
void	queryfree (struct dns_transmit *)
void	packetfree (struct dns_transmit *)
int	serverwantstcp (const char *, unsigned int)
int	serverfailed (const char *, unsigned int)
int	getscopeid (const struct dns_transmit *, const char *)
int	firstudp (struct dns_transmit *)
int	nextudp (struct dns_transmit *)
int	firsttcp (struct dns_transmit *)
int	nexttcp (struct dns_transmit *)

Variables
struct dns_transmit	dns_resolve_tx

Macro Definition Documentation

DNS_C_ANY

#define DNS_C_ANY   "\0\377"

Definition at line 61 of file dnsresolv.h.

DNS_C_IN

#define DNS_C_IN   "\0\1"

Definition at line 60 of file dnsresolv.h.

DNS_COM

#define DNS_COM   -3 /* (socket) communication errors: SERVFAIL */

Definition at line 45 of file dnsresolv.h.

DNS_ERR

#define DNS_ERR   -2 /* parsing errors and others */

Definition at line 44 of file dnsresolv.h.

DNS_HARD

#define DNS_HARD   -6 /* DNS loop problem */

Definition at line 48 of file dnsresolv.h.

DNS_INT

#define DNS_INT   -4 /* internal errors */

Definition at line 46 of file dnsresolv.h.

DNS_MEM

#define DNS_MEM   -1 /* out of memory; fatal */

Definition at line 43 of file dnsresolv.h.

DNS_NAME4_DOMAIN

#define DNS_NAME4_DOMAIN   31

Definition at line 165 of file dnsresolv.h.

DNS_NAME6_DOMAIN

#define DNS_NAME6_DOMAIN   (4*16+11)

Definition at line 179 of file dnsresolv.h.

DNS_NXD

#define DNS_NXD   0 /* NXDOMAIN, NODATA */

Definition at line 42 of file dnsresolv.h.

DNS_SOFT

#define DNS_SOFT   -5 /* DNS_ERR or DNS_COM */

Definition at line 47 of file dnsresolv.h.

DNS_T_A

#define DNS_T_A   "\0\1"

Definition at line 63 of file dnsresolv.h.

DNS_T_AAAA

#define DNS_T_AAAA   "\0\34"

Definition at line 74 of file dnsresolv.h.

DNS_T_ANY

#define DNS_T_ANY   "\0\377"

Definition at line 92 of file dnsresolv.h.

DNS_T_AXFR

#define DNS_T_AXFR   "\0\374"

Definition at line 91 of file dnsresolv.h.

DNS_T_CAA

#define DNS_T_CAA   "\1\1"

Definition at line 93 of file dnsresolv.h.

DNS_T_CERT

#define DNS_T_CERT   "\0\45"

Definition at line 77 of file dnsresolv.h.

DNS_T_CNAME

#define DNS_T_CNAME   "\0\5"

Definition at line 65 of file dnsresolv.h.

DNS_T_DNSKEY

#define DNS_T_DNSKEY   "\0\60"

Definition at line 84 of file dnsresolv.h.

DNS_T_DS

#define DNS_T_DS   "\0\53"

Definition at line 79 of file dnsresolv.h.

DNS_T_HINFO

#define DNS_T_HINFO   "\0\15"

Definition at line 68 of file dnsresolv.h.

DNS_T_HIP

#define DNS_T_HIP   "\0\67"

Definition at line 88 of file dnsresolv.h.

DNS_T_IPSECKEY

#define DNS_T_IPSECKEY   "\0\55"

Definition at line 81 of file dnsresolv.h.

DNS_T_KEY

#define DNS_T_KEY   "\0\31"

Definition at line 73 of file dnsresolv.h.

DNS_T_MX

#define DNS_T_MX   "\0\17"

Definition at line 69 of file dnsresolv.h.

DNS_T_NAPTR

#define DNS_T_NAPTR   "\0\43"

Definition at line 76 of file dnsresolv.h.

DNS_T_NS

#define DNS_T_NS   "\0\2"

Definition at line 64 of file dnsresolv.h.

DNS_T_NSEC

#define DNS_T_NSEC   "\0\57"

Definition at line 83 of file dnsresolv.h.

DNS_T_NSEC3

#define DNS_T_NSEC3   "\0\62"

Definition at line 85 of file dnsresolv.h.

DNS_T_NSEC3PARAM

#define DNS_T_NSEC3PARAM   "\0\63"

Definition at line 86 of file dnsresolv.h.

DNS_T_OPENPGPKEY

#define DNS_T_OPENPGPKEY   "\0\75"

Definition at line 89 of file dnsresolv.h.

DNS_T_OPT

#define DNS_T_OPT   "\0\51"

Definition at line 78 of file dnsresolv.h.

DNS_T_PTR

#define DNS_T_PTR   "\0\14"

Definition at line 67 of file dnsresolv.h.

DNS_T_RP

#define DNS_T_RP   "\0\21"

Definition at line 71 of file dnsresolv.h.

DNS_T_RRSIG

#define DNS_T_RRSIG   "\0\56"

Definition at line 82 of file dnsresolv.h.

DNS_T_SIG

#define DNS_T_SIG   "\0\30"

Definition at line 72 of file dnsresolv.h.

DNS_T_SOA

#define DNS_T_SOA   "\0\6"

Definition at line 66 of file dnsresolv.h.

DNS_T_SPF

#define DNS_T_SPF   "\0\143"

Definition at line 90 of file dnsresolv.h.

DNS_T_SRV

#define DNS_T_SRV   "\0\41"

Definition at line 75 of file dnsresolv.h.

DNS_T_SSHFP

#define DNS_T_SSHFP   "\0\54"

Definition at line 80 of file dnsresolv.h.

DNS_T_TLSA

#define DNS_T_TLSA   "\0\64"

Definition at line 87 of file dnsresolv.h.

DNS_T_TXT

#define DNS_T_TXT   "\0\20"

Definition at line 70 of file dnsresolv.h.

IP4_LOOPBACK

#define IP4_LOOPBACK   "ip4-loopback"

Definition at line 96 of file dnsresolv.h.

IP6_LOOPBACK

#define IP6_LOOPBACK   "ip6-loopback"

Definition at line 97 of file dnsresolv.h.

LOCALHOST

#define LOCALHOST   "localhost" /* no clear distinction IPv4/IPv6 */

Definition at line 95 of file dnsresolv.h.

MAXMSGSIZE

#define MAXMSGSIZE   4096 /* 4069 seen with EDNS0 */

Definition at line 52 of file dnsresolv.h.

MAXSEGMENT

#define MAXSEGMENT   65535 /* Max TCP buffer size */

Definition at line 53 of file dnsresolv.h.

MSGSIZE

#define MSGSIZE   MTUSIZE /* todays default */

Definition at line 50 of file dnsresolv.h.

QUERY_MAXIPLEN

#define QUERY_MAXIPLEN   512 /* QUERY_MAXNS * 16 */

Definition at line 56 of file dnsresolv.h.

QUERY_MAXNS

#define QUERY_MAXNS   32 /* 16 IPv4 + 16 IPv6 NS */

Definition at line 55 of file dnsresolv.h.

Function Documentation

dns_cname()

int dns_cname	(	stralloc *	out,
		stralloc *	fqdn
	)

Definition at line 47 of file dns_cname.c.

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dns_cname_packet()

int dns_cname_packet	(	stralloc *	out,
		const char *	buf,
		unsigned int	len
	)

Definition at line 16 of file dns_cname.c.

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dns_domain_copy()

int dns_domain_copy	(	char **	out,
		const char *	in
	)

Definition at line 32 of file dns_domain.c.

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dns_domain_equal()

int dns_domain_equal	(	const char *	dn1,
		const char *	dn2
	)

Definition at line 46 of file dns_domain.c.

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dns_domain_free()

void dns_domain_free

(

char **

out

)

Definition at line 24 of file dns_domain.c.

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dns_domain_fromdot()

int dns_domain_fromdot	(	char **	out,
		const char *	buf,
		unsigned int	n
	)

Definition at line 13 of file dns_dfd.c.

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dns_domain_length()

unsigned int dns_domain_length

(

const char *

dn

)

Definition at line 13 of file dns_domain.c.

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dns_domain_suffix()

int dns_domain_suffix	(	const char *	big,
		const char *	little
	)

Definition at line 57 of file dns_domain.c.

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dns_domain_suffixpos()

unsigned int dns_domain_suffixpos	(	const char *	big,
		const char *	little
	)

Definition at line 69 of file dns_domain.c.

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dns_domain_todot_cat()

int dns_domain_todot_cat	(	stralloc *	out,
		const char *	d
	)

Definition at line 11 of file dns_dtda.c.

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dns_ip4()

int dns_ip4	(	stralloc *	out,
		stralloc *	fqdn
	)

Definition at line 49 of file dns_ip.c.

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dns_ip4_packet()

int dns_ip4_packet	(	stralloc *	out,
		const char *	buf,
		unsigned int	len
	)

Definition at line 16 of file dns_ip.c.

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dns_ip4_qualify()

int dns_ip4_qualify	(	stralloc *	ipout,
		stralloc *	fqdn,
		const stralloc *	in
	)

Definition at line 82 of file dns_ipq.c.

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dns_ip4_qualify_rules()

int dns_ip4_qualify_rules	(	stralloc *	ipout,
		stralloc *	fqdn,
		const stralloc *	in,
		const stralloc *	rules
	)

Definition at line 46 of file dns_ipq.c.

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dns_ip6()

int dns_ip6	(	stralloc *	out,
		stralloc *	fqdn
	)

Definition at line 148 of file dns_ip.c.

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dns_ip6_packet()

int dns_ip6_packet	(	stralloc *	out,
		const char *	buf,
		unsigned int	len
	)

Definition at line 108 of file dns_ip.c.

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dns_ip6_qualify()

int dns_ip6_qualify	(	stralloc *	ipout,
		stralloc *	fqdn,
		const stralloc *	in
	)

Definition at line 130 of file dns_ipq.c.

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dns_ip6_qualify_rules()

int dns_ip6_qualify_rules	(	stralloc *	ipout,
		stralloc *	fqdn,
		const stralloc *	in,
		const stralloc *	rules
	)

Definition at line 94 of file dns_ipq.c.

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dns_ip_qualify()

int dns_ip_qualify	(	stralloc *	ipout,
		stralloc *	fqdn,
		const stralloc *	in
	)

Definition at line 227 of file dns_ipq.c.

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dns_ip_qualify_localhost()

int dns_ip_qualify_localhost	(	stralloc *	ipout,
		stralloc *	fqdn,
		const stralloc *	in
	)

Definition at line 201 of file dns_ipq.c.

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dns_ip_qualify_rules()

int dns_ip_qualify_rules	(	stralloc *	ipout,
		stralloc *	fqdn,
		const stralloc *	in,
		const stralloc *	rules
	)

Definition at line 142 of file dns_ipq.c.

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dns_mx()

int dns_mx	(	stralloc *	out,
		const stralloc *	fqdn
	)

Definition at line 51 of file dns_mx.c.

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dns_mx_packet()

int dns_mx_packet	(	stralloc *	out,
		const char *	buf,
		unsigned int	len
	)

Definition at line 16 of file dns_mx.c.

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dns_name()

int dns_name	(	stralloc *	,
		const char *
	)

dns_name4()

int dns_name4	(	stralloc *	,
		const char *
	)

dns_name4_domain()

int dns_name4_domain	(	char *	,
		const char *
	)

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dns_name6()

int dns_name6	(	stralloc *	,
		const char *
	)

dns_name6_domain()

int dns_name6_domain	(	char *	,
		const char *
	)

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dns_name_packet()

int dns_name_packet	(	stralloc *	out,
		const char *	buf,
		unsigned int	len
	)

Definition at line 16 of file dns_name.c.

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dns_packet_copy()

unsigned int dns_packet_copy	(	const char *	buf,
		unsigned int	len,
		unsigned int	pos,
		char *	out,
		unsigned int	outlen
	)

Definition at line 12 of file dns_packet.c.

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dns_packet_getname()

unsigned int dns_packet_getname	(	const char *	buf,
		unsigned int	len,
		unsigned int	pos,
		char **	d
	)

Definition at line 39 of file dns_packet.c.

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dns_packet_skipname()

unsigned int dns_packet_skipname	(	const char *	buf,
		unsigned int	len,
		unsigned int	pos
	)

Definition at line 22 of file dns_packet.c.

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dns_random()

unsigned int dns_random

(

unsigned int

n

)

Definition at line 59 of file dns_random.c.

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dns_random_init()

void dns_random_init

(

const char *

)

dns_resolvconfip()

int dns_resolvconfip	(	char *	,
		uint32 *
	)

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dns_resolvconfrewrite()

int dns_resolvconfrewrite

(

stralloc *

out

)

Definition at line 122 of file dns_rcrw.c.

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dns_resolve()

int dns_resolve	(	const char *	,
		const char *
	)

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dns_sortip4()

void dns_sortip4	(	char *	s,
		unsigned int	n
	)

Definition at line 17 of file dns_sortip.c.

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dns_sortip6()

void dns_sortip6	(	char *	s,
		unsigned int	n
	)

Definition at line 32 of file dns_sortip.c.

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dns_transmit_free()

void dns_transmit_free

(

struct dns_transmit *

d

)

Definition at line 105 of file dns_transmit.c.

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dns_transmit_get()

int dns_transmit_get	(	struct dns_transmit *	d,
		const iopause_fd *	x,
		const struct taia *	when
	)

Definition at line 311 of file dns_transmit.c.

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dns_transmit_io()

void dns_transmit_io	(	struct dns_transmit *	d,
		iopause_fd *	x,
		struct taia *	deadline
	)

Definition at line 294 of file dns_transmit.c.

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dns_transmit_start()

int dns_transmit_start	(	struct dns_transmit *	,
		const char *	,
		int	,
		const char *	,
		const char *	,
		const char *
	)

dns_transmit_start6()

int dns_transmit_start6	(	struct dns_transmit *	,
		const char *	,
		int	,
		const char *	,
		const char *	,
		const char *	,
		const uint32 *
	)

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dns_txt()

int dns_txt	(	stralloc *	out,
		const stralloc *	fqdn
	)

Definition at line 60 of file dns_txt.c.

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dns_txt_packet()

int dns_txt_packet	(	stralloc *	out,
		const char *	buf,
		unsigned int	len
	)

Definition at line 13 of file dns_txt.c.

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firsttcp()

int firsttcp

(

struct dns_transmit *

d

)

Definition at line 243 of file dns_transmit.c.

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firstudp()

int firstudp

(

struct dns_transmit *

d

)

Definition at line 184 of file dns_transmit.c.

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getscopeid()

int getscopeid	(	const struct dns_transmit *	d,
		const char *	ip
	)

Definition at line 26 of file dns_transmit.c.

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nexttcp()

int nexttcp

(

struct dns_transmit *

d

)

Definition at line 249 of file dns_transmit.c.

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nextudp()

int nextudp

(

struct dns_transmit *

d

)

Definition at line 190 of file dns_transmit.c.

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packetfree()

void packetfree

(

struct dns_transmit *

d

)

Definition at line 84 of file dns_transmit.c.

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queryfree()

void queryfree

(

struct dns_transmit *

d

)

Definition at line 91 of file dns_transmit.c.

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randombind4()

int randombind4

(

struct dns_transmit *

d

)

Definition at line 126 of file dns_transmit.c.

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randombind6()

int randombind6

(

struct dns_transmit *

d

)

Definition at line 112 of file dns_transmit.c.

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serverfailed()

int serverfailed	(	const char *	buf,
		unsigned int	len
	)

Definition at line 48 of file dns_transmit.c.

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serverwantstcp()

int serverwantstcp	(	const char *	buf,
		unsigned int	len
	)

Definition at line 38 of file dns_transmit.c.

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socketfree()

void socketfree

(

struct dns_transmit *

d

)

Definition at line 98 of file dns_transmit.c.

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Variable Documentation

dns_resolve_tx

struct dns_transmit dns_resolve_tx

extern

Definition at line 14 of file dns_resolve.c.