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net/dns: add new Config that captures tailscale+OS DNS config.

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Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson 2021-04-02 00:34:03 -07:00 committed by Dave Anderson
parent 8af9d770cf
commit 2edb57dbf1
1 changed files with 28 additions and 0 deletions
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28
net/dns/config.go
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@ -8,6 +8,34 @@ import (
"inet.af/netaddr"
)
// Config is a DNS configuration.
type Config struct {
// DefaultResolvers are the DNS resolvers to use for DNS names
// which aren't covered by more specific per-domain routes below.
// If empty, the OS's default resolvers (the ones that predate
// Tailscale altering the configuration) are used.
DefaultResolvers []netaddr.IPPort
// Routes maps a DNS suffix to the resolvers that should be used
// for queries that fall within that suffix.
// If a query doesn't match any entry in Routes, the
// DefaultResolvers are used.
Routes map[string][]netaddr.IPPort
// SearchDomains are DNS suffixes to try when expanding
// single-label queries.
SearchDomains []string
// Hosts maps DNS FQDNs to their IPs, which can be a mix of IPv4
// and IPv6.
// Queries matching entries in Hosts are resolved locally without
// recursing off-machine.
Hosts map[string][]netaddr.IP
// AuthoritativeSuffixes is a list of fully-qualified DNS suffixes
// for which the in-process Tailscale resolver is authoritative.
// Queries for names within AuthoritativeSuffixes can only be
// fulfilled by entries in Hosts. Queries with no match in Hosts
// return NXDOMAIN.
AuthoritativeSuffixes []string
}
// OSConfig is an OS DNS configuration.
type OSConfig struct {
// Nameservers are the IP addresses of the nameservers to use.