spf.c File Reference

#include "stralloc.h"
#include "alloc.h"
#include "ip.h"
#include "ipalloc.h"
#include "ipme.h"
#include "str.h"
#include "fmt.h"
#include "scan.h"
#include "byte.h"
#include "now.h"
#include "dns.h"
#include "case.h"
#include "spf.h"

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Data Structures
struct	spf_aliases
struct	mechanisms

Functions
int	spf_query (const char *remoteip, const char *helo, const char *mf, const char *local, const int flagip)
	spf_query prepares the SPF TXT record query
int	spf_lookup (stralloc *domain)
	spf_lookup calles the actual (recursive) SPF DNS query
int	spf_mechanism (char *mechanism, char *spfspec, char *prefix, char *domain)
	spf_mechanism evaluates the provided mechanisms in the SPF record [RFC7208 Sec 5.]
int	spf_include (char *spfspec, char *prefix)
	spf_include deals with recursive evaluation of SPF record [RFC7208 Sec. 5.2]
int	spf_parse (stralloc *sa, char *spfspec, char *domain)
	spf_parse parses the substructure of the SPF record and calls spf_macros
int	spf_macros (stralloc *expand, char *macro, char *domain)
	spf_macros deals with macros in the SPF specificaton [RFC7208 Sec. 7ff]
int	spf_info (char *s, const char *t)

Variables
stralloc	spfinfo = {0}
stralloc	spfrecord = {0}
stralloc	spflocalrules
stralloc	spfexplain
stralloc	spfmf = {0}
stralloc	spfhelo = {0}
stralloc	dnsname = {0}
stralloc	spflocal = {0}
stralloc	spfexpmsg = {0}
stralloc	expdomain = {0}
int	flagip6
stralloc	domain = {0}
stralloc	identity = {0}
char	ip4remote [4] = {0, 0, 0, 0}
char	ip6remote [16] = {16 * 0}

Function Documentation

spf_include()

int spf_include	(	char *	spfspec,
		char *	prefix
	)

spf_include deals with recursive evaluation of SPF record [RFC7208 Sec. 5.2]

Parameters

input

pointer to included SPF specification; CIDR prefix length

Returns

int r = 1 ok; 0 failure

Definition at line 431 of file spf.c.

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spf_info()

int spf_info	(	char *	s,
		const char *	t
	)

Definition at line 640 of file spf.c.

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spf_lookup()

int spf_lookup

(

stralloc *

domain

)

spf_lookup calles the actual (recursive) SPF DNS query

Parameters

input

pointer to stralloc domain (fqdn) @input stralloc spflocalrules (if provided – for artificial results) @output stralloc spfdata with RDATA (+ artificial information)

Returns

int r = SPF return code

Definition at line 158 of file spf.c.

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spf_macros()

int spf_macros	(	stralloc *	expand,
		char *	macro,
		char *	domain
	)

spf_macros deals with macros in the SPF specificaton [RFC7208 Sec. 7ff]

Parameters

input

pointer to SPF macro, pointer to domain output: pointer to stralloc expand(ed information)

Returns

int r = 1 ok; 0 failure

Definition at line 502 of file spf.c.

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spf_mechanism()

int spf_mechanism	(	char *	mechanism,
		char *	spfspec,
		char *	prefix,
		char *	domain
	)

spf_mechanism evaluates the provided mechanisms in the SPF record [RFC7208 Sec 5.]

Parameters

input

pointer to mechanism, SPF specification from record, CIDR prefix length, domain @input stralloc spflocalrules (if provided) @output pointer to spfspec: data evaluated

Returns

int r

Definition at line 391 of file spf.c.

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spf_parse()

int spf_parse	(	stralloc *	sa,
		char *	spfspec,
		char *	domain
	)

spf_parse parses the substructure of the SPF record and calls spf_macros

Parameters

input

pointer to SPF specification, pointer to domain output: stralloc sa – @output pointer to spfspec: with found data

Returns

int r = 1 ok; 0 failure

Definition at line 461 of file spf.c.

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spf_query()

int spf_query	(	const char *	remoteip,
		const char *	helo,
		const char *	mf,
		const char *	local,
		const int	flagip
	)

spf_query prepares the SPF TXT record query

Parameters

input

pointer to remoteip, helo, mf, localhost, and flagIP6

Returns

int r = SPF return code

Definition at line 58 of file spf.c.

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Variable Documentation

dnsname

stralloc dnsname = {0}

Definition at line 27 of file spf.c.

domain

stralloc domain = {0}

Definition at line 34 of file spf.c.

expdomain

stralloc expdomain = {0}

Definition at line 31 of file spf.c.

flagip6

int flagip6

Definition at line 32 of file spf.c.

identity

stralloc identity = {0}

Definition at line 35 of file spf.c.

ip4remote

char ip4remote[4] = {0, 0, 0, 0}

Definition at line 38 of file spf.c.

ip6remote

char ip6remote[16] = {16 * 0}

Definition at line 39 of file spf.c.

spfexplain

stralloc spfexplain

Definition at line 23 of file spf.c.

spfexpmsg

stralloc spfexpmsg = {0}

Definition at line 30 of file spf.c.

spfhelo

stralloc spfhelo = {0}

Definition at line 26 of file spf.c.

spfinfo

stralloc spfinfo = {0}

Definition at line 17 of file spf.c.

spflocal

stralloc spflocal = {0}

Definition at line 28 of file spf.c.

spflocalrules

stralloc spflocalrules

Definition at line 22 of file spf.c.

spfmf

stralloc spfmf = {0}

Definition at line 25 of file spf.c.

spfrecord

stralloc spfrecord = {0}

Definition at line 18 of file spf.c.