87898d5eb3
- Replace hardcoded 127.0.0.1:53 in systemResolver() with actual system DNS from /etc/resolv.conf (falls back to 127.0.0.1:53 if unavailable) - Add Resolver field to RootDiscoveryConfig so callers can override the upstream resolver used during root server discovery - Add --dns-upstream flag (e.g. --dns-upstream 8.8.8.8:53) to exploredns CLI and DNSUpstream field to Config - Add internal/dns/hints.go with all 13 IANA root server IPv4/IPv6 addresses as embedded constants (RootHints []RootServer) - Update tests: fix real_exchange_test.go call site; add hints_test.go covering RootHints correctness and resolver helper functions Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Co-authored-by: multica-agent <github@multica.ai>
75 lines
2.0 KiB
Go
75 lines
2.0 KiB
Go
package dns
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import "net"
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// RootHints contains the 13 IANA root name servers with their well-known
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// IPv4 and IPv6 addresses as published at https://www.iana.org/domains/root/servers.
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// These addresses change very rarely and are safe to embed as application constants.
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var RootHints = []RootServer{
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{
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Name: "a.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("198.41.0.4")},
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IPv6: []net.IP{net.ParseIP("2001:503:ba3e::2:30")},
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},
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{
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Name: "b.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("170.247.170.2")},
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IPv6: []net.IP{net.ParseIP("2801:1b8:10::b")},
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},
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{
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Name: "c.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("192.33.4.12")},
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IPv6: []net.IP{net.ParseIP("2001:500:2::c")},
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},
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{
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Name: "d.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("199.7.91.13")},
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IPv6: []net.IP{net.ParseIP("2001:500:2d::d")},
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},
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{
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Name: "e.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("192.203.230.10")},
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IPv6: []net.IP{net.ParseIP("2001:500:a8::e")},
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},
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{
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Name: "f.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("192.5.5.241")},
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IPv6: []net.IP{net.ParseIP("2001:500:2f::f")},
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},
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{
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Name: "g.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("192.112.36.4")},
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IPv6: []net.IP{net.ParseIP("2001:500:12::d0d")},
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},
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{
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Name: "h.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("198.97.190.53")},
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IPv6: []net.IP{net.ParseIP("2001:500:1::53")},
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},
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{
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Name: "i.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("192.36.148.17")},
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IPv6: []net.IP{net.ParseIP("2001:7fe::53")},
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},
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{
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Name: "j.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("192.58.128.30")},
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IPv6: []net.IP{net.ParseIP("2001:503:c27::2:30")},
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},
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{
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Name: "k.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("193.0.14.129")},
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IPv6: []net.IP{net.ParseIP("2001:7fd::1")},
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},
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{
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Name: "l.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("199.7.83.42")},
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IPv6: []net.IP{net.ParseIP("2001:500:9f::42")},
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},
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{
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Name: "m.root-servers.net.",
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IPv4: []net.IP{net.ParseIP("202.12.27.33")},
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IPv6: []net.IP{net.ParseIP("2001:dc3::35")},
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},
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}
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