diff options
Diffstat (limited to 'vendor/golang.org/x/net/internal/iana/gen.go')
-rw-r--r-- | vendor/golang.org/x/net/internal/iana/gen.go | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/vendor/golang.org/x/net/internal/iana/gen.go b/vendor/golang.org/x/net/internal/iana/gen.go new file mode 100644 index 000000000..2d8c07ca1 --- /dev/null +++ b/vendor/golang.org/x/net/internal/iana/gen.go @@ -0,0 +1,293 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build ignore + +//go:generate go run gen.go + +// This program generates internet protocol constants and tables by +// reading IANA protocol registries. +package main + +import ( + "bytes" + "encoding/xml" + "fmt" + "go/format" + "io" + "io/ioutil" + "net/http" + "os" + "strconv" + "strings" +) + +var registries = []struct { + url string + parse func(io.Writer, io.Reader) error +}{ + { + "http://www.iana.org/assignments/dscp-registry/dscp-registry.xml", + parseDSCPRegistry, + }, + { + "http://www.iana.org/assignments/ipv4-tos-byte/ipv4-tos-byte.xml", + parseTOSTCByte, + }, + { + "http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml", + parseProtocolNumbers, + }, +} + +func main() { + var bb bytes.Buffer + fmt.Fprintf(&bb, "// go generate gen.go\n") + fmt.Fprintf(&bb, "// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT\n\n") + fmt.Fprintf(&bb, "// Package iana provides protocol number resources managed by the Internet Assigned Numbers Authority (IANA).\n") + fmt.Fprintf(&bb, `package iana // import "golang.org/x/net/internal/iana"`+"\n\n") + for _, r := range registries { + resp, err := http.Get(r.url) + if err != nil { + fmt.Fprintln(os.Stderr, err) + os.Exit(1) + } + defer resp.Body.Close() + if resp.StatusCode != http.StatusOK { + fmt.Fprintf(os.Stderr, "got HTTP status code %v for %v\n", resp.StatusCode, r.url) + os.Exit(1) + } + if err := r.parse(&bb, resp.Body); err != nil { + fmt.Fprintln(os.Stderr, err) + os.Exit(1) + } + fmt.Fprintf(&bb, "\n") + } + b, err := format.Source(bb.Bytes()) + if err != nil { + fmt.Fprintln(os.Stderr, err) + os.Exit(1) + } + if err := ioutil.WriteFile("const.go", b, 0644); err != nil { + fmt.Fprintln(os.Stderr, err) + os.Exit(1) + } +} + +func parseDSCPRegistry(w io.Writer, r io.Reader) error { + dec := xml.NewDecoder(r) + var dr dscpRegistry + if err := dec.Decode(&dr); err != nil { + return err + } + drs := dr.escape() + fmt.Fprintf(w, "// %s, Updated: %s\n", dr.Title, dr.Updated) + fmt.Fprintf(w, "const (\n") + for _, dr := range drs { + fmt.Fprintf(w, "DiffServ%s = %#x", dr.Name, dr.Value) + fmt.Fprintf(w, "// %s\n", dr.OrigName) + } + fmt.Fprintf(w, ")\n") + return nil +} + +type dscpRegistry struct { + XMLName xml.Name `xml:"registry"` + Title string `xml:"title"` + Updated string `xml:"updated"` + Note string `xml:"note"` + RegTitle string `xml:"registry>title"` + PoolRecords []struct { + Name string `xml:"name"` + Space string `xml:"space"` + } `xml:"registry>record"` + Records []struct { + Name string `xml:"name"` + Space string `xml:"space"` + } `xml:"registry>registry>record"` +} + +type canonDSCPRecord struct { + OrigName string + Name string + Value int +} + +func (drr *dscpRegistry) escape() []canonDSCPRecord { + drs := make([]canonDSCPRecord, len(drr.Records)) + sr := strings.NewReplacer( + "+", "", + "-", "", + "/", "", + ".", "", + " ", "", + ) + for i, dr := range drr.Records { + s := strings.TrimSpace(dr.Name) + drs[i].OrigName = s + drs[i].Name = sr.Replace(s) + n, err := strconv.ParseUint(dr.Space, 2, 8) + if err != nil { + continue + } + drs[i].Value = int(n) << 2 + } + return drs +} + +func parseTOSTCByte(w io.Writer, r io.Reader) error { + dec := xml.NewDecoder(r) + var ttb tosTCByte + if err := dec.Decode(&ttb); err != nil { + return err + } + trs := ttb.escape() + fmt.Fprintf(w, "// %s, Updated: %s\n", ttb.Title, ttb.Updated) + fmt.Fprintf(w, "const (\n") + for _, tr := range trs { + fmt.Fprintf(w, "%s = %#x", tr.Keyword, tr.Value) + fmt.Fprintf(w, "// %s\n", tr.OrigKeyword) + } + fmt.Fprintf(w, ")\n") + return nil +} + +type tosTCByte struct { + XMLName xml.Name `xml:"registry"` + Title string `xml:"title"` + Updated string `xml:"updated"` + Note string `xml:"note"` + RegTitle string `xml:"registry>title"` + Records []struct { + Binary string `xml:"binary"` + Keyword string `xml:"keyword"` + } `xml:"registry>record"` +} + +type canonTOSTCByteRecord struct { + OrigKeyword string + Keyword string + Value int +} + +func (ttb *tosTCByte) escape() []canonTOSTCByteRecord { + trs := make([]canonTOSTCByteRecord, len(ttb.Records)) + sr := strings.NewReplacer( + "Capable", "", + "(", "", + ")", "", + "+", "", + "-", "", + "/", "", + ".", "", + " ", "", + ) + for i, tr := range ttb.Records { + s := strings.TrimSpace(tr.Keyword) + trs[i].OrigKeyword = s + ss := strings.Split(s, " ") + if len(ss) > 1 { + trs[i].Keyword = strings.Join(ss[1:], " ") + } else { + trs[i].Keyword = ss[0] + } + trs[i].Keyword = sr.Replace(trs[i].Keyword) + n, err := strconv.ParseUint(tr.Binary, 2, 8) + if err != nil { + continue + } + trs[i].Value = int(n) + } + return trs +} + +func parseProtocolNumbers(w io.Writer, r io.Reader) error { + dec := xml.NewDecoder(r) + var pn protocolNumbers + if err := dec.Decode(&pn); err != nil { + return err + } + prs := pn.escape() + prs = append([]canonProtocolRecord{{ + Name: "IP", + Descr: "IPv4 encapsulation, pseudo protocol number", + Value: 0, + }}, prs...) + fmt.Fprintf(w, "// %s, Updated: %s\n", pn.Title, pn.Updated) + fmt.Fprintf(w, "const (\n") + for _, pr := range prs { + if pr.Name == "" { + continue + } + fmt.Fprintf(w, "Protocol%s = %d", pr.Name, pr.Value) + s := pr.Descr + if s == "" { + s = pr.OrigName + } + fmt.Fprintf(w, "// %s\n", s) + } + fmt.Fprintf(w, ")\n") + return nil +} + +type protocolNumbers struct { + XMLName xml.Name `xml:"registry"` + Title string `xml:"title"` + Updated string `xml:"updated"` + RegTitle string `xml:"registry>title"` + Note string `xml:"registry>note"` + Records []struct { + Value string `xml:"value"` + Name string `xml:"name"` + Descr string `xml:"description"` + } `xml:"registry>record"` +} + +type canonProtocolRecord struct { + OrigName string + Name string + Descr string + Value int +} + +func (pn *protocolNumbers) escape() []canonProtocolRecord { + prs := make([]canonProtocolRecord, len(pn.Records)) + sr := strings.NewReplacer( + "-in-", "in", + "-within-", "within", + "-over-", "over", + "+", "P", + "-", "", + "/", "", + ".", "", + " ", "", + ) + for i, pr := range pn.Records { + if strings.Contains(pr.Name, "Deprecated") || + strings.Contains(pr.Name, "deprecated") { + continue + } + prs[i].OrigName = pr.Name + s := strings.TrimSpace(pr.Name) + switch pr.Name { + case "ISIS over IPv4": + prs[i].Name = "ISIS" + case "manet": + prs[i].Name = "MANET" + default: + prs[i].Name = sr.Replace(s) + } + ss := strings.Split(pr.Descr, "\n") + for i := range ss { + ss[i] = strings.TrimSpace(ss[i]) + } + if len(ss) > 1 { + prs[i].Descr = strings.Join(ss, " ") + } else { + prs[i].Descr = ss[0] + } + prs[i].Value, _ = strconv.Atoi(pr.Value) + } + return prs +} |