1package connect
2
3import (
4	"fmt"
5
6	"github.com/hashicorp/consul/agent/structs"
7)
8
9func UpstreamSNI(u *structs.Upstream, subset string, dc string, trustDomain string) string {
10	if u.Datacenter != "" {
11		dc = u.Datacenter
12	}
13
14	if u.DestinationType == structs.UpstreamDestTypePreparedQuery {
15		return QuerySNI(u.DestinationName, dc, trustDomain)
16	}
17	return ServiceSNI(u.DestinationName, subset, u.DestinationNamespace, dc, trustDomain)
18}
19
20func DatacenterSNI(dc string, trustDomain string) string {
21	return fmt.Sprintf("%s.internal.%s", dc, trustDomain)
22}
23
24func ServiceSNI(service string, subset string, namespace string, datacenter string, trustDomain string) string {
25	if namespace == "" {
26		namespace = "default"
27	}
28
29	if subset == "" {
30		return fmt.Sprintf("%s.%s.%s.internal.%s", service, namespace, datacenter, trustDomain)
31	} else {
32		return fmt.Sprintf("%s.%s.%s.%s.internal.%s", subset, service, namespace, datacenter, trustDomain)
33	}
34}
35
36func QuerySNI(service string, datacenter string, trustDomain string) string {
37	return fmt.Sprintf("%s.default.%s.query.%s", service, datacenter, trustDomain)
38}
39
40func TargetSNI(target *structs.DiscoveryTarget, trustDomain string) string {
41	return ServiceSNI(target.Service, target.ServiceSubset, target.Namespace, target.Datacenter, trustDomain)
42}
43