From e8d0474a8e0f55ee6c93c0ad003e801c3fcc4d15 Mon Sep 17 00:00:00 2001 From: Wim Date: Mon, 21 May 2018 22:25:16 +0200 Subject: [PATCH] Add github.com/coredns/coredns/plugin/pkg/dnsutil files --- vendor/github.com/coredns/coredns/LICENSE | 201 ++++++++++++++++++ .../coredns/plugin/pkg/dnsutil/cname.go | 15 ++ .../coredns/plugin/pkg/dnsutil/dedup.go | 12 ++ .../coredns/coredns/plugin/pkg/dnsutil/doc.go | 2 + .../coredns/plugin/pkg/dnsutil/host.go | 82 +++++++ .../coredns/plugin/pkg/dnsutil/join.go | 19 ++ .../coredns/plugin/pkg/dnsutil/reverse.go | 81 +++++++ .../coredns/plugin/pkg/dnsutil/zone.go | 20 ++ 8 files changed, 432 insertions(+) create mode 100644 vendor/github.com/coredns/coredns/LICENSE create mode 100644 vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/cname.go create mode 100644 vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/dedup.go create mode 100644 vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/doc.go create mode 100644 vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/host.go create mode 100644 vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/join.go create mode 100644 vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/reverse.go create mode 100644 vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/zone.go diff --git a/vendor/github.com/coredns/coredns/LICENSE b/vendor/github.com/coredns/coredns/LICENSE new file mode 100644 index 000000000..8dada3eda --- /dev/null +++ b/vendor/github.com/coredns/coredns/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright {yyyy} {name of copyright owner} + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/cname.go b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/cname.go new file mode 100644 index 000000000..281e03218 --- /dev/null +++ b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/cname.go @@ -0,0 +1,15 @@ +package dnsutil + +import "github.com/miekg/dns" + +// DuplicateCNAME returns true if r already exists in records. +func DuplicateCNAME(r *dns.CNAME, records []dns.RR) bool { + for _, rec := range records { + if v, ok := rec.(*dns.CNAME); ok { + if v.Target == r.Target { + return true + } + } + } + return false +} diff --git a/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/dedup.go b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/dedup.go new file mode 100644 index 000000000..dae656a01 --- /dev/null +++ b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/dedup.go @@ -0,0 +1,12 @@ +package dnsutil + +import "github.com/miekg/dns" + +// Dedup de-duplicates a message. +func Dedup(m *dns.Msg) *dns.Msg { + // TODO(miek): expensive! + m.Answer = dns.Dedup(m.Answer, nil) + m.Ns = dns.Dedup(m.Ns, nil) + m.Extra = dns.Dedup(m.Extra, nil) + return m +} diff --git a/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/doc.go b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/doc.go new file mode 100644 index 000000000..75d1e8c7a --- /dev/null +++ b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/doc.go @@ -0,0 +1,2 @@ +// Package dnsutil contains DNS related helper functions. +package dnsutil diff --git a/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/host.go b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/host.go new file mode 100644 index 000000000..aaab586e8 --- /dev/null +++ b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/host.go @@ -0,0 +1,82 @@ +package dnsutil + +import ( + "fmt" + "net" + "os" + + "github.com/miekg/dns" +) + +// ParseHostPortOrFile parses the strings in s, each string can either be a address, +// address:port or a filename. The address part is checked and the filename case a +// resolv.conf like file is parsed and the nameserver found are returned. +func ParseHostPortOrFile(s ...string) ([]string, error) { + var servers []string + for _, host := range s { + addr, _, err := net.SplitHostPort(host) + if err != nil { + // Parse didn't work, it is not a addr:port combo + if net.ParseIP(host) == nil { + // Not an IP address. + ss, err := tryFile(host) + if err == nil { + servers = append(servers, ss...) + continue + } + return servers, fmt.Errorf("not an IP address or file: %q", host) + } + ss := net.JoinHostPort(host, "53") + servers = append(servers, ss) + continue + } + + if net.ParseIP(addr) == nil { + // No an IP address. + ss, err := tryFile(host) + if err == nil { + servers = append(servers, ss...) + continue + } + return servers, fmt.Errorf("not an IP address or file: %q", host) + } + servers = append(servers, host) + } + return servers, nil +} + +// Try to open this is a file first. +func tryFile(s string) ([]string, error) { + c, err := dns.ClientConfigFromFile(s) + if err == os.ErrNotExist { + return nil, fmt.Errorf("failed to open file %q: %q", s, err) + } else if err != nil { + return nil, err + } + + servers := []string{} + for _, s := range c.Servers { + servers = append(servers, net.JoinHostPort(s, c.Port)) + } + return servers, nil +} + +// ParseHostPort will check if the host part is a valid IP address, if the +// IP address is valid, but no port is found, defaultPort is added. +func ParseHostPort(s, defaultPort string) (string, error) { + addr, port, err := net.SplitHostPort(s) + if port == "" { + port = defaultPort + } + if err != nil { + if net.ParseIP(s) == nil { + return "", fmt.Errorf("must specify an IP address: `%s'", s) + } + return net.JoinHostPort(s, port), nil + } + + if net.ParseIP(addr) == nil { + return "", fmt.Errorf("must specify an IP address: `%s'", addr) + } + return net.JoinHostPort(addr, port), nil +} diff --git a/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/join.go b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/join.go new file mode 100644 index 000000000..515bf3dad --- /dev/null +++ b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/join.go @@ -0,0 +1,19 @@ +package dnsutil + +import ( + "strings" + + "github.com/miekg/dns" +) + +// Join joins labels to form a fully qualified domain name. If the last label is +// the root label it is ignored. Not other syntax checks are performed. +func Join(labels []string) string { + ll := len(labels) + if labels[ll-1] == "." { + s := strings.Join(labels[:ll-1], ".") + return dns.Fqdn(s) + } + s := strings.Join(labels, ".") + return dns.Fqdn(s) +} diff --git a/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/reverse.go b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/reverse.go new file mode 100644 index 000000000..7bfd23539 --- /dev/null +++ b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/reverse.go @@ -0,0 +1,81 @@ +package dnsutil + +import ( + "net" + "strings" +) + +// ExtractAddressFromReverse turns a standard PTR reverse record name +// into an IP address. This works for ipv4 or ipv6. +// +// 54.119.58.176.in-addr.arpa. becomes 176.58.119.54. If the conversion +// fails the empty string is returned. +func ExtractAddressFromReverse(reverseName string) string { + search := "" + + f := reverse + + switch { + case strings.HasSuffix(reverseName, IP4arpa): + search = strings.TrimSuffix(reverseName, IP4arpa) + case strings.HasSuffix(reverseName, IP6arpa): + search = strings.TrimSuffix(reverseName, IP6arpa) + f = reverse6 + default: + return "" + } + + // Reverse the segments and then combine them. + return f(strings.Split(search, ".")) +} + +// IsReverse returns 0 is name is not in a reverse zone. Anything > 0 indicates +// name is in a reverse zone. The returned integer will be 1 for in-addr.arpa. (IPv4) +// and 2 for ip6.arpa. (IPv6). +func IsReverse(name string) int { + if strings.HasSuffix(name, IP4arpa) { + return 1 + } + if strings.HasSuffix(name, IP6arpa) { + return 2 + } + return 0 +} + +func reverse(slice []string) string { + for i := 0; i < len(slice)/2; i++ { + j := len(slice) - i - 1 + slice[i], slice[j] = slice[j], slice[i] + } + ip := net.ParseIP(strings.Join(slice, ".")).To4() + if ip == nil { + return "" + } + return ip.String() +} + +// reverse6 reverse the segments and combine them according to RFC3596: +// b.a.9.8.7.6.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2 +// is reversed to 2001:db8::567:89ab +func reverse6(slice []string) string { + for i := 0; i < len(slice)/2; i++ { + j := len(slice) - i - 1 + slice[i], slice[j] = slice[j], slice[i] + } + slice6 := []string{} + for i := 0; i < len(slice)/4; i++ { + slice6 = append(slice6, strings.Join(slice[i*4:i*4+4], "")) + } + ip := net.ParseIP(strings.Join(slice6, ":")).To16() + if ip == nil { + return "" + } + return ip.String() +} + +const ( + // IP4arpa is the reverse tree suffix for v4 IP addresses. + IP4arpa = ".in-addr.arpa." + // IP6arpa is the reverse tree suffix for v6 IP addresses. + IP6arpa = ".ip6.arpa." +) diff --git a/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/zone.go b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/zone.go new file mode 100644 index 000000000..579fef1ba --- /dev/null +++ b/vendor/github.com/coredns/coredns/plugin/pkg/dnsutil/zone.go @@ -0,0 +1,20 @@ +package dnsutil + +import ( + "errors" + + "github.com/miekg/dns" +) + +// TrimZone removes the zone component from q. It returns the trimmed +// name or an error is zone is longer then qname. The trimmed name will be returned +// without a trailing dot. +func TrimZone(q string, z string) (string, error) { + zl := dns.CountLabel(z) + i, ok := dns.PrevLabel(q, zl) + if ok || i-1 < 0 { + return "", errors.New("trimzone: overshot qname: " + q + "for zone " + z) + } + // This includes the '.', remove on return + return q[:i-1], nil +}