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Copy from dig flags to q 

q is a sample query app for Go dns
This commit is contained in:
Miek Gieben 2010-12-30 18:48:29 +01:00
parent acdab89120
commit 1b362f5bd2
2 changed files with 32 additions and 22 deletions
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2
TODO
View File

@ -8,6 +8,8 @@ Todo:
* query-time, server in string ouput of dns.Msg
Issues:
* Better sized buffers
* TC bit handling
* shortened ipv6 addresses are not parsed correctly
* quoted quotes in txt records
* Convience functions?

52
_examples/q/q.go
View File

@ -10,18 +10,22 @@ import (
"os"
"flag"
"fmt"
"strings"
"strings"
)
func main() {
var dnssec *bool = flag.Bool("dnssec", false, "Set the DO (DNSSEC OK) bit and set the bufsize to 4096")
var port *string = flag.String("port", "53", "Set the query port")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s [@server] [qtype] [qclass] [name ...]\n", os.Args[0])
flag.PrintDefaults()
}
var port *string = flag.String("port", "53", "Set the query port")
var aa *bool = flag.Bool("aa", false, "Set AA flag in query")
var ad *bool = flag.Bool("ad", false, "Set AD flag in query")
var cd *bool = flag.Bool("cd", false, "Set CD flag in query")
var rd *bool = flag.Bool("rd", true, "Unset RD flag in query")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s [@server] [qtype] [qclass] [name ...]\n", os.Args[0])
flag.PrintDefaults()
}
nameserver := "@127.0.0.1" // Default nameserver
nameserver := "@127.0.0.1" // Default nameserver
qtype := uint16(dns.TypeA) // Default qtype
qclass := uint16(dns.ClassINET) // Default qclass
var qname []string
@ -53,31 +57,35 @@ FLAGS:
qname = append(qname, flag.Arg(i))
}
r := new(resolver.Resolver)
r.Timeout = 2
r.Port = *port
r.Attempts = 1
r.Timeout = 2
r.Port = *port
r.Attempts = 1
qr := resolver.NewQuerier(r)
// @server may be a name, resolv that
var err os.Error
nameserver = string([]byte(nameserver)[1:]) // chop off @
nameserver = string([]byte(nameserver)[1:]) // chop off @
_, addr, err := net.LookupHost(nameserver)
if err == nil {
r.Servers = addr
} else {
r.Servers = []string{nameserver}
}
if err == nil {
r.Servers = addr
} else {
r.Servers = []string{nameserver}
}
m := new(dns.Msg)
m.MsgHdr.Authoritative = *aa
m.MsgHdr.AuthenticatedData = *ad
m.MsgHdr.CheckingDisabled = *cd
m.MsgHdr.RecursionDesired = *rd
m.Question = make([]dns.Question, 1)
if *dnssec {
opt := new(dns.RR_OPT)
opt.Hdr = dns.RR_Header{Name: "", Rrtype: dns.TypeOPT}
opt.Version(0, true)
opt.DoBit(true, true)
opt.UDPSize(4096, true)
opt := new(dns.RR_OPT)
opt.Hdr = dns.RR_Header{Name: "", Rrtype: dns.TypeOPT}
opt.Version(0, true)
opt.DoBit(true, true)
opt.UDPSize(4096, true)
m.Extra = make([]dns.RR, 1)
m.Extra[0] = opt
m.Extra[0] = opt
}
for _, v := range qname {
m.Question[0] = dns.Question{v, qtype, qclass}