diff options
| -rw-r--r-- | cmd/resolver/resolver.go | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/cmd/resolver/resolver.go b/cmd/resolver/resolver.go index 72204e4..9561089 100644 --- a/cmd/resolver/resolver.go +++ b/cmd/resolver/resolver.go @@ -4,11 +4,13 @@ package main import ( + "crypto/rand" "encoding/json" "fmt" "io" "log" - "math/rand" + "math" + "math/big" "os" "strconv" "strings" @@ -773,15 +775,21 @@ func (rsol *resolver) newRescachedClient() (resc *rescached.Client) { func (rsol *resolver) query(timeout time.Duration, qname string) (res *dns.Message, err error) { var ( - logp = "query" - req = dns.NewMessage() - ) + logp = "query" + req = dns.NewMessage() + randMax = big.NewInt(math.MaxUint16) - rand.Seed(time.Now().Unix()) + randv *big.Int + ) rsol.dnsc.SetTimeout(timeout) - req.Header.ID = uint16(rand.Intn(65535)) + randv, err = rand.Int(rand.Reader, randMax) + if err != nil { + log.Panicf(`%s: %s`, logp, err) + } + + req.Header.ID = uint16(randv.Int64()) req.Question.Name = qname req.Question.Type = rsol.qtype req.Question.Class = rsol.qclass |