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add more documentation, examples with tests to illustrate reusable components

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This commit is contained in:
Mechiel Lukkien
2023-12-12 15:47:26 +01:00
parent 810cbdc61d
commit d1b66035a9
40 changed files with 973 additions and 119 deletions
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6
spf/spf.go
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@ -117,7 +117,7 @@ var timeNow = time.Now
// Lookup looks up and parses an SPF TXT record for domain.
//
// authentic indicates if the DNS results were DNSSEC-verified.
// Authentic indicates if the DNS results were DNSSEC-verified.
func Lookup(ctx context.Context, elog *slog.Logger, resolver dns.Resolver, domain dns.Domain) (rstatus Status, rtxt string, rrecord *Record, authentic bool, rerr error) {
log := mlog.New("spf", elog)
start := time.Now()
@ -186,7 +186,7 @@ func Lookup(ctx context.Context, elog *slog.Logger, resolver dns.Resolver, domai
// Verify takes the maximum number of 10 DNS requests into account, and the maximum
// of 2 lookups resulting in no records ("void lookups").
//
// authentic indicates if the DNS results were DNSSEC-verified.
// Authentic indicates if the DNS results were DNSSEC-verified.
func Verify(ctx context.Context, elog *slog.Logger, resolver dns.Resolver, args Args) (received Received, domain dns.Domain, explanation string, authentic bool, rerr error) {
log := mlog.New("spf", elog)
start := time.Now()
@ -869,7 +869,7 @@ func expandIP(ip net.IP) string {
}
// validateDNS checks if a DNS name is valid. Must not end in dot. This does not
// check valid host names, e.g. _ is allows in DNS but not in a host name.
// check valid host names, e.g. _ is allowed in DNS but not in a host name.
func validateDNS(s string) error {
// ../rfc/7208:800
// note: we are not checking for max 253 bytes length, because one of the callers may be chopping off labels to "correct" the name.