DHT default server ID generated using hostname and server address

diff --git a/dht/dht.go b/dht/dht.go
index d7e8e92ac1134adcbdbd82c548ace24d470b0c4c..c251cbcb0bc7eaa7ad3e15aa2f0a9afbbc128ddd 100644 (file)
--- a/dht/dht.go
+++ b/dht/dht.go
@@ -1,7 +1,8 @@
 package dht
 
 import (
-       "crypto/rand"
+       "crypto"
+       _ "crypto/sha1"
        "encoding/binary"
        "errors"
        "fmt"
@@ -9,6 +10,7 @@ import (
        "io"
        "log"
        "net"
+       "os"
        "sync"
        "time"
 )
@@ -57,9 +59,18 @@ type transaction struct {
 func (s *Server) setDefaults() {
        if s.ID == "" {
                var id [20]byte
-               _, err := rand.Read(id[:])
+               h := crypto.SHA1.New()
+               ss, err := os.Hostname()
                if err != nil {
-                       panic(err)
+                       log.Print(err)
+               }
+               ss += s.Socket.LocalAddr().String()
+               h.Write([]byte(ss))
+               if b := h.Sum(id[:0:20]); len(b) != 20 {
+                       panic(len(b))
+               }
+               if len(id) != 20 {
+                       panic(len(id))
                }
                s.ID = string(id[:])
        }