forked from toolshed/abra
61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
package dns
|
|
|
|
import (
|
|
"errors"
|
|
"net"
|
|
|
|
"coopcloud.tech/abra/pkg/i18n"
|
|
)
|
|
|
|
// EnsureIPv4 ensures that an ipv4 address is set for a domain name
|
|
func EnsureIPv4(domainName string) (string, error) {
|
|
ipv4, err := net.ResolveIPAddr("ip4", domainName)
|
|
if err != nil {
|
|
return "", errors.New(i18n.G("%s: unable to resolve IPv4 address: %s", domainName, err))
|
|
}
|
|
|
|
if ipv4 == nil {
|
|
return "", errors.New(i18n.G("%s: no IPv4 available", domainName))
|
|
}
|
|
|
|
return ipv4.String(), nil
|
|
}
|
|
|
|
// EnsureDomainsResolveSameIPv4 ensures that domains resolve to the same ipv4 address
|
|
func EnsureDomainsResolveSameIPv4(domainName, server string) (string, error) {
|
|
if server == "default" || server == "local" {
|
|
return "", nil
|
|
}
|
|
|
|
var ipv4 string
|
|
|
|
domainIPv4, err := EnsureIPv4(domainName)
|
|
if err != nil {
|
|
return ipv4, err
|
|
}
|
|
|
|
if domainIPv4 == "" {
|
|
return ipv4, errors.New(i18n.G("cannot resolve ipv4 for %s?", domainName))
|
|
}
|
|
|
|
serverIPv4, err := EnsureIPv4(server)
|
|
if err != nil {
|
|
return ipv4, err
|
|
}
|
|
|
|
if serverIPv4 == "" {
|
|
return ipv4, errors.New(i18n.G("cannot resolve ipv4 for %s?", server))
|
|
}
|
|
|
|
if domainIPv4 != serverIPv4 {
|
|
return ipv4, errors.New(
|
|
i18n.G(
|
|
"app domain %s (%s) does not appear to resolve to app server %s (%s)?",
|
|
domainName, domainIPv4, server, serverIPv4,
|
|
),
|
|
)
|
|
}
|
|
|
|
return ipv4, nil
|
|
}
|