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net/dns/publicdns: add support for Wikimedia DNS

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RELNOTE=Adds support for Wikimedia DNS

Updates #9255

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I4213c29e0f91ea5aa0304a5a026c32b6690fead9
This commit is contained in:
Andrew Dunham 2023-09-06 10:18:27 -04:00
parent d61494db68
commit d413dd7ee5
1 changed files with 15 additions and 1 deletions
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16
net/dns/publicdns/publicdns.go
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@ -129,6 +129,11 @@ func addDoH(ipStr, base string) {
dohIPsOfBase[base] = append(dohIPsOfBase[base], ip)
}
const (
wikimediaDNSv4 = "185.71.138.138"
wikimediaDNSv6 = "2001:67c:930::1"
)
// populate is called once to initialize the knownDoH and dohIPsOfBase maps.
func populate() {
// Cloudflare
@ -185,6 +190,10 @@ func populate() {
addDoH("194.242.2.3", "https://adblock.doh.mullvad.net/dns-query")
addDoH("193.19.108.3", "https://adblock.doh.mullvad.net/dns-query")
addDoH("2a07:e340::3", "https://adblock.doh.mullvad.net/dns-query")
// Wikimedia
addDoH(wikimediaDNSv4, "https://wikimedia-dns.org/dns-query")
addDoH(wikimediaDNSv6, "https://wikimedia-dns.org/dns-query")
}
var (
@ -207,6 +216,10 @@ func populate() {
nextDNSv4RangeB = netip.MustParsePrefix("45.90.30.0/24")
nextDNSv4One = nextDNSv4RangeA.Addr()
nextDNSv4Two = nextDNSv4RangeB.Addr()
// Wikimedia DNS server IPs (anycast)
wikimediaDNSv4Addr = netip.MustParseAddr(wikimediaDNSv4)
wikimediaDNSv6Addr = netip.MustParseAddr(wikimediaDNSv6)
)
// nextDNSv6Gen generates a NextDNS IPv6 address from the upper 8 bytes in the
@ -224,5 +237,6 @@ func nextDNSv6Gen(ip netip.Addr, id []byte) netip.Addr {
// DNS-over-HTTPS (not regular port 53 DNS).
func IPIsDoHOnlyServer(ip netip.Addr) bool {
return nextDNSv6RangeA.Contains(ip) || nextDNSv6RangeB.Contains(ip) ||
nextDNSv4RangeA.Contains(ip) || nextDNSv4RangeB.Contains(ip)
nextDNSv4RangeA.Contains(ip) || nextDNSv4RangeB.Contains(ip) ||
ip == wikimediaDNSv4Addr || ip == wikimediaDNSv6Addr
}