Subversion Repositories openrisc

// Copyright 2011 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.

package net

import (
        "encoding/hex"
        "testing"
)

func TestDNSParseSRVReply(t *testing.T) {
        data, err := hex.DecodeString(dnsSRVReply)
        if err != nil {
                t.Fatal(err)
        }
        msg := new(dnsMsg)
        ok := msg.Unpack(data)
        if !ok {
                t.Fatalf("unpacking packet failed")
        }
        if g, e := len(msg.answer), 5; g != e {
                t.Errorf("len(msg.answer) = %d; want %d", g, e)
        }
        for idx, rr := range msg.answer {
                if g, e := rr.Header().Rrtype, uint16(dnsTypeSRV); g != e {
                        t.Errorf("rr[%d].Header().Rrtype = %d; want %d", idx, g, e)
                }
                if _, ok := rr.(*dnsRR_SRV); !ok {
                        t.Errorf("answer[%d] = %T; want *dnsRR_SRV", idx, rr)
                }
        }
        _, addrs, err := answer("_xmpp-server._tcp.google.com.", "foo:53", msg, uint16(dnsTypeSRV))
        if err != nil {
                t.Fatalf("answer: %v", err)
        }
        if g, e := len(addrs), 5; g != e {
                t.Errorf("len(addrs) = %d; want %d", g, e)
                t.Logf("addrs = %#v", addrs)
        }
}

func TestDNSParseCorruptSRVReply(t *testing.T) {
        data, err := hex.DecodeString(dnsSRVCorruptReply)
        if err != nil {
                t.Fatal(err)
        }
        msg := new(dnsMsg)
        ok := msg.Unpack(data)
        if !ok {
                t.Fatalf("unpacking packet failed")
        }
        if g, e := len(msg.answer), 5; g != e {
                t.Errorf("len(msg.answer) = %d; want %d", g, e)
        }
        for idx, rr := range msg.answer {
                if g, e := rr.Header().Rrtype, uint16(dnsTypeSRV); g != e {
                        t.Errorf("rr[%d].Header().Rrtype = %d; want %d", idx, g, e)
                }
                if idx == 4 {
                        if _, ok := rr.(*dnsRR_Header); !ok {
                                t.Errorf("answer[%d] = %T; want *dnsRR_Header", idx, rr)
                        }
                } else {
                        if _, ok := rr.(*dnsRR_SRV); !ok {
                                t.Errorf("answer[%d] = %T; want *dnsRR_SRV", idx, rr)
                        }
                }
        }
        _, addrs, err := answer("_xmpp-server._tcp.google.com.", "foo:53", msg, uint16(dnsTypeSRV))
        if err != nil {
                t.Fatalf("answer: %v", err)
        }
        if g, e := len(addrs), 4; g != e {
                t.Errorf("len(addrs) = %d; want %d", g, e)
                t.Logf("addrs = %#v", addrs)
        }
}

// Valid DNS SRV reply
const dnsSRVReply = "0901818000010005000000000c5f786d70702d736572766572045f74637006676f6f67" +
        "6c6503636f6d0000210001c00c002100010000012c00210014000014950c786d70702d" +
        "73657276657234016c06676f6f676c6503636f6d00c00c002100010000012c00210014" +
        "000014950c786d70702d73657276657232016c06676f6f676c6503636f6d00c00c0021" +
        "00010000012c00210014000014950c786d70702d73657276657233016c06676f6f676c" +
        "6503636f6d00c00c002100010000012c00200005000014950b786d70702d7365727665" +
        "72016c06676f6f676c6503636f6d00c00c002100010000012c00210014000014950c78" +
        "6d70702d73657276657231016c06676f6f676c6503636f6d00"

// Corrupt DNS SRV reply, with its final RR having a bogus length
// (perhaps it was truncated, or it's malicious) The mutation is the
// capital "FF" below, instead of the proper "21".
const dnsSRVCorruptReply = "0901818000010005000000000c5f786d70702d736572766572045f74637006676f6f67" +
        "6c6503636f6d0000210001c00c002100010000012c00210014000014950c786d70702d" +
        "73657276657234016c06676f6f676c6503636f6d00c00c002100010000012c00210014" +
        "000014950c786d70702d73657276657232016c06676f6f676c6503636f6d00c00c0021" +
        "00010000012c00210014000014950c786d70702d73657276657233016c06676f6f676c" +
        "6503636f6d00c00c002100010000012c00200005000014950b786d70702d7365727665" +
        "72016c06676f6f676c6503636f6d00c00c002100010000012c00FF0014000014950c78" +
        "6d70702d73657276657231016c06676f6f676c6503636f6d00"