add edns
Signed-off-by: Sam Therapy <sam@samtherapy.net>
This commit is contained in:
parent
252e95ee2d
commit
8aad12c7ef
GPG key ID:
4D8B07C18F31ACBD
3 changed files with 145 additions and 136 deletions
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@ -253,28 +253,30 @@ func MakePrintable(res util.Response, opts *util.Options) (*Message, error) {
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)
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// The things I do for compatibility
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ret := &Message{
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RTT: res.RTT.String(),
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Server: opts.Request.Server + serverExtra(opts),
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DateString: time.Now().Format(time.RFC3339),
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DateSeconds: time.Now().Unix(),
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MsgSize: res.DNS.Len(),
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ID: msg.Id,
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Opcode: dns.OpcodeToString[msg.Opcode],
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Status: dns.RcodeToString[msg.Rcode],
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Opcode: msg.Opcode,
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Response: msg.Response,
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Authoritative: msg.Authoritative,
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Truncated: msg.Truncated,
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RecursionDesired: msg.RecursionDesired,
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RecursionAvailable: msg.RecursionAvailable,
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Zero: msg.Zero,
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AuthenticatedData: msg.AuthenticatedData,
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CheckingDisabled: msg.CheckingDisabled,
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Zero: msg.Zero,
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QdCount: len(msg.Question),
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AnCount: len(msg.Answer),
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NsCount: len(msg.Ns),
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ArCount: len(msg.Extra),
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}
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opt := msg.IsEdns0()
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if opt != nil && opts.Display.Opt {
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ret.Opt, err = ret.ParseOpt(*opt)
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ret.EDNS0, err = ret.ParseOpt(msg.Rcode, *opt)
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if err != nil {
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return nil, fmt.Errorf("edns print: %w", err)
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}
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@ -13,30 +13,30 @@ type Message struct {
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DateString string `json:"dateString,omitempty" xml:"dateString,omitempty" yaml:"dateString,omitempty"`
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DateSeconds int64 `json:"dateSeconds,omitempty" xml:"dateSeconds,omitempty" yaml:"dateSeconds,omitempty"`
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MsgSize int `json:"msgLength,omitempty" xml:"msgSize,omitempty" yaml:"msgSize,omitempty"`
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ID uint16 `json:"id," xml:"id," yaml:"id" example:"12"`
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ID uint16 `json:"ID" xml:"ID" yaml:"ID" example:"12"`
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Opcode string `json:"opcode," xml:"opcode," yaml:"opcode" example:"QUERY"`
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Status string `json:"status," xml:"status," yaml:"status" example:"NOERR"`
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Response bool `json:"response," xml:"response," yaml:"response" example:"true"`
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Authoritative bool `json:"authoritative," xml:"authoritative," yaml:"authoritative" example:"false"`
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Truncated bool `json:"truncated," xml:"truncated," yaml:"truncated" example:"false"`
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RecursionDesired bool `json:"RD," xml:"recursionDesired," yaml:"recursionDesired" example:"true"`
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RecursionAvailable bool `json:"RA," xml:"recursionAvailable," yaml:"recursionAvailable" example:"true"`
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Zero bool `json:"zero," xml:"zero," yaml:"zero" example:"false"`
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AuthenticatedData bool `json:"authenticatedData," xml:"authenticatedData," yaml:"authenticatedData" example:"false"`
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CheckingDisabled bool `json:"checkingDisabled," xml:"checkingDisabled," yaml:"checkingDisabled" example:"false"`
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Name string `json:"QNAME,omitempty" xml:"QNAME,omitempty" yaml:"QNAME,omitempty" example:"localhost"`
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Type uint16 `json:"QTYPE,omitempty" xml:"QTYPE,omitempty" yaml:"QTYPE,omitempty" example:"IN"`
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TypeName string `json:"QTYPEname,omitempty" xml:"QTYPEname,omitempty" yaml:"QTYPEname,omitempty" example:"IN"`
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Class uint16 `json:"QCLASS,omitempty" xml:"QCLASS,omitempty" yaml:"QCLASS,omitempty" example:"A"`
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ClassName string `json:"QCLASSname,omitempty" xml:"QCLASSname,omitempty" yaml:"QCLASSname,omitempty" example:"1"`
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RTT string `json:"queryTime,omitempty" xml:"queryTime,omitempty" yaml:"queryTime,omitempty"`
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Server string `json:"server,omitempty" xml:"server,omitempty" yaml:"server,omitempty"`
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When string `json:"when,omitempty" xml:"when,omitempty" yaml:"when,omitempty"`
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Opcode int `json:"opcode" xml:"opcode" yaml:"opcode" example:"QUERY"`
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Response bool `json:"QR" xml:"QR" yaml:"QR" example:"true"`
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Authoritative bool `json:"AA" xml:"AA" yaml:"AA" example:"false"`
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Truncated bool `json:"TC" xml:"TC" yaml:"TC" example:"false"`
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RecursionDesired bool `json:"RD" xml:"RD" yaml:"RD" example:"true"`
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RecursionAvailable bool `json:"RA" xml:"RA" yaml:"RA" example:"true"`
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AuthenticatedData bool `json:"AD" xml:"AD" yaml:"AD" example:"false"`
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CheckingDisabled bool `json:"CD" xml:"CD" yaml:"CD" example:"false"`
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Zero bool `json:"Z" xml:"Z" yaml:"Z" example:"false"`
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Opt []Opts `json:"opt,omitempty" xml:"opt,omitempty" yaml:"opt,omitempty"`
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// Question Section
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Question []Question `json:"question,omitempty" xml:"question,omitempty" yaml:"question,omitempty"`
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QdCount int `json:"QDCOUNT" xml:"QDCOUNT" yaml:"QDCOUNT" example:"0"`
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AnCount int `json:"ANCOUNT" xml:"ANCOUNT" yaml:"ANCOUNT" example:"0"`
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NsCount int `json:"NSCOUNT" xml:"NSCOUNT" yaml:"NSCOUNT" example:"0"`
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ArCount int `json:"ARCOUNT" xml:"ARCOUNT" yaml:"ARCOUNT" example:"0"`
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Name string `json:"QNAME,omitempty" xml:"QNAME,omitempty" yaml:"QNAME,omitempty" example:"localhost"`
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Type uint16 `json:"QTYPE,omitempty" xml:"QTYPE,omitempty" yaml:"QTYPE,omitempty" example:"IN"`
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TypeName string `json:"QTYPEname,omitempty" xml:"QTYPEname,omitempty" yaml:"QTYPEname,omitempty" example:"IN"`
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Class uint16 `json:"QCLASS,omitempty" xml:"QCLASS,omitempty" yaml:"QCLASS,omitempty" example:"A"`
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ClassName string `json:"QCLASSname,omitempty" xml:"QCLASSname,omitempty" yaml:"QCLASSname,omitempty" example:"1"`
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EDNS0 EDNS0 `json:",omitempty" xml:",omitempty" yaml:",omitempty"`
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// Answer Section
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AnswerRRs []Answer `json:"answersRRs,omitempty" xml:"answersRRs,omitempty" yaml:"answersRRs,omitempty" example:"false"`
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@ -44,36 +44,73 @@ type Message struct {
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AdditionalRRs []Answer `json:"additionalRRs,omitempty" xml:"additionalRRs,omitempty" yaml:"additionalRRs,omitempty" example:"false"`
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}
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// Question is a DNS Query.
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//
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//nolint:govet,tagliatelle
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type Question struct {
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Name string `json:"name,omitempty" xml:"name,omitempty" yaml:"name,omitempty" example:"localhost"`
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Type uint16 `json:"TYPE,omitempty" xml:"type,omitempty" yaml:"type,omitempty" example:"IN"`
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TypeName string `json:"TYPEname,omitempty" xml:"TYPEname,omitempty" yaml:"TYPEname,omitempty" example:"IN"`
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Class uint16 `json:"CLASS,omitempty" xml:"class,omitempty" yaml:"class,omitempty" example:"A"`
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ClassName string `json:"CLASSname,omitempty" xml:"CLASSname,omitempty" yaml:"CLASSname,omitempty" example:"1"`
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}
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// Answer is for DNS Resource Headers.
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//
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//nolint:govet,tagliatelle
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type Answer struct {
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Name string `json:"NAME,omitempty" xml:"name,omitempty" yaml:"name,omitempty" example:"127.0.0.1"`
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Type uint16 `json:"TYPE,omitempty" xml:"type,omitempty" yaml:"type,omitempty" example:"IN"`
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TypeName string `json:"TYPEname,omitempty" xml:"TYPEname,omitempty" yaml:"TYPEname,omitempty" example:"IN"`
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Class uint16 `json:"CLASS,omitempty" xml:"class,omitempty" yaml:"class,omitempty" example:"A"`
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ClassName string `json:"CLASSname,omitempty" xml:"CLASSname,omitempty" yaml:"CLASSname,omitempty" example:"A"`
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TTL any `json:"TTL,omitempty" xml:"ttl,omitempty" yaml:"ttl,omitempty" example:"0ms"`
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Name string `json:"NAME,omitempty" xml:"NAME,omitempty" yaml:"NAME,omitempty" example:"127.0.0.1"`
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Type uint16 `json:"TYPE,omitempty" xml:"TYPE,omitempty" yaml:"TYPE,omitempty" example:"1"`
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TypeName string `json:"TYPEname,omitempty" xml:"TYPEname,omitempty" yaml:"TYPEname,omitempty" example:"A"`
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Class uint16 `json:"CLASS,omitempty" xml:"CLASS,omitempty" yaml:"CLASS,omitempty" example:"1"`
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ClassName string `json:"CLASSname,omitempty" xml:"CLASSname,omitempty" yaml:"CLASSname,omitempty" example:"IN"`
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TTL any `json:"TTL,omitempty" xml:"TTL,omitempty" yaml:"TTL,omitempty" example:"0ms"`
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Value string `json:"rdata,omitempty" xml:"rdata,omitempty" yaml:"rdata,omitempty"`
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Rdlength uint16 `json:"RDLENGTH,omitempty" xml:"RDLENGTH,omitempty" yaml:"RDLENGTH,omitempty"`
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Rdhex string `json:"RDATAHEX,omitempty" xml:"RDATAHEX,omitempty" yaml:"RDATAHEX,omitempty"`
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}
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// Opts is for the OPT pseudosection, nearly exclusively for EDNS.
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type Opts struct {
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Name string `json:"name,omitempty" xml:"name,omitempty" yaml:"name,omitempty"`
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Value string `json:"value" xml:"value" yaml:"value"`
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// EDNS0 is for all EDNS options.
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//
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// RFC: https://datatracker.ietf.org/doc/draft-peltan-edns-presentation-format/
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//
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//nolint:govet,tagliatelle
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type EDNS0 struct {
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Flags []string `json:"FLAGS" xml:"FLAGS" yaml:"FLAGS"`
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Rcode string `json:"RCODE" xml:"RCODE" yaml:"RCODE"`
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PayloadSize uint16 `json:"UDPSIZE" xml:"UDPSIZE" yaml:"UDPSIZE"`
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LLQ *EdnsLLQ `json:"LLQ,omitempty" xml:"LLQ,omitempty" yaml:"LLQ,omitempty"`
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NsidHex string `json:"NSIDHEX,omitempty" xml:"NSIDHEX,omitempty" yaml:"NSIDHEX,omitempty"`
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Nsid string `json:"NSID,omitempty" xml:"NSID,omitempty" yaml:"NSID,omitempty"`
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Dau []uint8 `json:"DAU,omitempty" xml:"DAU,omitempty" yaml:"DAU,omitempty"`
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Dhu []uint8 `json:"DHU,omitempty" xml:"DHU,omitempty" yaml:"DHU,omitempty"`
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N3u []uint8 `json:"N3U,omitempty" xml:"N3U,omitempty" yaml:"N3U,omitempty"`
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Subnet *EDNSSubnet `json:"ECS,omitempty" xml:"ECS,omitempty" yaml:"ECS,omitempty"`
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Expire uint32 `json:"EXPIRE,omitempty" xml:"EXPIRE,omitempty" yaml:"EXPIRE,omitempty"`
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Cookie []string `json:"COOKIE,omitempty" xml:"COOKIE,omitempty" yaml:"COOKIE,omitempty"`
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KeepAlive uint16 `json:"KEEPALIVE,omitempty" xml:"KEEPALIVE,omitempty" yaml:"KEEPALIVE,omitempty"`
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Padding string `json:"PADDING,omitempty" xml:"PADDING,omitempty" yaml:"PADDING,omitempty"`
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Chain string `json:"CHAIN,omitempty" xml:"CHAIN,omitempty" yaml:"CHAIN,omitempty"`
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EDE *EDNSErr `json:"EDE,omitempty" xml:"EDE,omitempty" yaml:"EDE,omitempty"`
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}
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// EdnsLLQ is for Long-lived queries.
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//
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//nolint:tagliatelle
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type EdnsLLQ struct {
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Version uint16 `json:"LLQ-VERSION" xml:"LLQ-VERSION" yaml:"LLQ-VERSION"`
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Opcode uint16 `json:"LLQ-OPCODE" xml:"LLQ-OPCODE" yaml:"LLQ-OPCODE"`
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Error uint16 `json:"LLQ-ERROR" xml:"LLQ-ERROR" yaml:"LLQ-ERROR"`
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ID uint64 `json:"LLQ-ID" xml:"LLQ-ID" yaml:"LLQ-ID"`
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Lease uint32 `json:"LLQ-LEASE" xml:"LLQ-LEASE" yaml:"LLQ-LEASE"`
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}
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// EDNSSubnet is for EDNS subnet options,
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//
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//nolint:govet,tagliatelle
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type EDNSSubnet struct {
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Family uint16 `json:"FAMILY" xml:"FAMILY" yaml:"FAMILY"`
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IP string
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Source uint8 `json:"SOURCE" xml:"SOURCE" yaml:"SOURCE"`
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Scope uint8 `json:"SCOPE,omitempty" xml:"SCOPE,omitempty" yaml:"SCOPE,omitempty"`
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}
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// EDNSErr is for EDE codes
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//
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//nolint:govet,tagliatelle
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type EDNSErr struct {
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Code uint16 `json:"INFO-CODE" xml:"INFO-CODE" yaml:"INFO-CODE"`
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Purpose string
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Text string `json:"EXTRA-TEXT,omitempty" xml:"EXTRA-TEXT,omitempty" yaml:"EXTRA-TEXT,omitempty"`
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}
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var errNoMessage = errors.New("no message")
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@ -170,118 +170,88 @@ func (message *Message) displayAdditional(msg *dns.Msg, opts *util.Options, opt
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}
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// ParseOpt parses opts.
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func (message *Message) ParseOpt(rr dns.OPT) ([]Opts, error) {
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ret := []Opts{}
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func (message *Message) ParseOpt(rcode int, rr dns.OPT) (ret EDNS0, err error) {
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ret.Rcode = dns.RcodeToString[rcode]
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// Most of this is taken from https://github.com/miekg/dns/blob/master/edns.go#L76
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ret = append(ret, Opts{
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Name: "Version",
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Value: strconv.Itoa(int(rr.Version())),
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})
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if rr.Do() {
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ret = append(ret, Opts{
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Name: "Flags",
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Value: "do",
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})
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} else {
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ret = append(ret, Opts{
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Name: "Flags",
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Value: "",
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})
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ret.Flags = append(ret.Flags, "DO")
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}
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if rr.Hdr.Ttl&0x7FFF != 0 {
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ret = append(ret, Opts{
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Name: "MBZ",
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Value: fmt.Sprintf("0x%04x", rr.Hdr.Ttl&0x7FFF),
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})
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for i := uint32(1); i <= 0x7FFF; i <<= 1 {
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if rr.Hdr.Ttl&i != 0 {
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ret.Flags = append(ret.Flags, fmt.Sprintf("FLAG%d", i))
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}
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}
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ret = append(ret, Opts{
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Name: "UDP Buffer Size",
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Value: strconv.Itoa(int(rr.UDPSize())),
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})
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ret.PayloadSize = rr.UDPSize()
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for _, opt := range rr.Option {
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switch opt.(type) {
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switch opt := opt.(type) {
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case *dns.EDNS0_NSID:
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str := opt.String()
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hex, err := hex.DecodeString(str)
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if err != nil {
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return nil, fmt.Errorf("%w", err)
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return ret, fmt.Errorf("%w", err)
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}
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ret = append(ret, Opts{
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Name: "NSID",
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Value: fmt.Sprintf("%s (%s)", str, string(hex)),
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})
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ret.NsidHex = string(hex)
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ret.Nsid = str
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case *dns.EDNS0_SUBNET:
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ret = append(ret, Opts{
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Name: "Subnet",
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Value: opt.String(),
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})
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ret.Subnet = &EDNSSubnet{
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Source: opt.SourceNetmask,
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Family: opt.Family,
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}
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// 1: IPv4 2: IPv6
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if ret.Subnet.Family <= 2 {
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ret.Subnet.IP = opt.Address.String()
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} else {
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ret.Subnet.IP = hex.EncodeToString([]byte(opt.Address))
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}
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if opt.SourceScope != 0 {
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ret.Subnet.Scope = opt.SourceScope
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}
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case *dns.EDNS0_COOKIE:
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ret = append(ret, Opts{
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Name: "Cookie",
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Value: opt.String(),
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})
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ret.Cookie = append(ret.Cookie, opt.String())
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case *dns.EDNS0_EXPIRE:
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ret = append(ret, Opts{
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Name: "Expire",
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Value: opt.String(),
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})
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ret.Expire = opt.Expire
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case *dns.EDNS0_TCP_KEEPALIVE:
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ret = append(ret, Opts{
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Name: "TCP Keepalive",
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Value: opt.String(),
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})
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case *dns.EDNS0_UL:
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ret = append(ret, Opts{
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Name: "Update Lease",
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Value: opt.String(),
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})
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ret.KeepAlive = opt.Timeout
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case *dns.EDNS0_LLQ:
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ret = append(ret, Opts{
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Name: "Long Lived Queries",
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Value: opt.String(),
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})
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ret.LLQ = &EdnsLLQ{
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Version: opt.Version,
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Opcode: opt.Opcode,
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Error: opt.Error,
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ID: opt.Id,
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Lease: opt.LeaseLife,
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}
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case *dns.EDNS0_DAU:
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ret = append(ret, Opts{
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Name: "DNSSEC Algorithm Understood",
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Value: opt.String(),
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})
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ret.Dau = opt.AlgCode
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case *dns.EDNS0_DHU:
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ret = append(ret, Opts{
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Name: "DS Hash Understood",
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Value: opt.String(),
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})
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ret.Dhu = opt.AlgCode
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case *dns.EDNS0_N3U:
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ret = append(ret, Opts{
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Name: "NSEC3 Hash Understood",
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Value: opt.String(),
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})
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case *dns.EDNS0_LOCAL:
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ret = append(ret, Opts{
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Name: "Local OPT",
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Value: opt.String(),
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})
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ret.N3u = opt.AlgCode
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case *dns.EDNS0_PADDING:
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ret = append(ret, Opts{
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Name: "Padding",
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Value: opt.String(),
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})
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ret.Padding = string(opt.Padding)
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case *dns.EDNS0_EDE:
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ret = append(ret, Opts{
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Name: "EDE",
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Value: opt.String(),
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})
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case *dns.EDNS0_ESU:
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ret = append(ret, Opts{
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Name: "ESU",
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Value: opt.String(),
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})
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ret.EDE = &EDNSErr{
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Code: opt.InfoCode,
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Purpose: dns.ExtendedErrorCodeToString[opt.InfoCode],
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Text: opt.ExtraText,
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}
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}
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}
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