lib/tests/testRFC1035.cc

   1 /*
   2  * Copyright (C) 1996-2014 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #include "squid.h"
  10 #include "testRFC1035.h"
  11
  12 #include <cassert>
  13
  14 /* Being a C library code it is best bodily included and tested with C++ type-safe techniques. */
  15 #include "lib/rfc1035.c"
  16 #include "lib/rfc2671.c"
  17
  18 CPPUNIT_TEST_SUITE_REGISTRATION( testRFC1035 );
  19
  20 // TODO Test each function in the Library independently
  21 //      Just because we can for global functions.
  22 //      It's good for the code too.
  23
  24 void testRFC1035::testHeaderUnpack()
  25 {
  26     /* Setup a buffer with the known-content packet */
  27     const char *buf = "\x76\xb1\x81\x80\x00\x01\x00\x01\x00\x02\x00\x02\x03\x77\x77\x77\x07\x67\x61\x6d\x65\x64\x65\x76\x03\x6e\x65\x74\x00\x00\x01\x00\x01\xc0\x0c\x00\x01\x00\x01\x00\x00\x00\xef\x00\x04\xd8\xb9\x60\xea\xc0\x10\x00\x02\x00\x01\x00\x00\x00\xef\x00\x0f\x03\x6e\x73\x32\x05\x7a\x77\x61\x76\x65\x03\x63\x6f\x6d\x00\xc0\x10\x00\x02\x00\x01\x00\x00\x00\xef\x00\x06\x03\x6e\x73\x31\xc0\x41\xc0\x3d\x00\x01\x00\x01\x00\x00\x29\x6b\x00\x04\xd8\xea\xee\x4a\xc0\x58\x00\x01\x00\x01\x00\x00\x29\x6b\x00\x04\xd8\xea\xee\x4b";
  28     size_t len = 126;
  29     rfc1035_message *msg = NULL;
  30     int res = 0;
  31     unsigned int off = 0;
  32
  33     /* Test the HeaderUnpack function */
  34     msg = new rfc1035_message;
  35     res = rfc1035HeaderUnpack(buf, len, &off, msg);
  36     CPPUNIT_ASSERT(res == 0);
  37     CPPUNIT_ASSERT_EQUAL((short unsigned int)0x76b1, msg->id);
  38     CPPUNIT_ASSERT(msg->qr == 1);
  39     /* flags */
  40     CPPUNIT_ASSERT_EQUAL((unsigned int)0, msg->opcode);
  41     CPPUNIT_ASSERT_EQUAL((unsigned int)0, msg->aa);
  42     CPPUNIT_ASSERT_EQUAL((unsigned int)0, msg->tc);
  43     CPPUNIT_ASSERT_EQUAL((unsigned int)1, msg->rd);
  44     CPPUNIT_ASSERT_EQUAL((unsigned int)1, msg->ra);
  45     CPPUNIT_ASSERT_EQUAL((unsigned int)0, msg->rcode);
  46     /* RR counts */
  47     CPPUNIT_ASSERT_EQUAL((unsigned short)1, msg->qdcount);
  48     CPPUNIT_ASSERT_EQUAL((unsigned short)1, msg->ancount);
  49     CPPUNIT_ASSERT_EQUAL((unsigned short)2, msg->nscount);
  50     CPPUNIT_ASSERT_EQUAL((unsigned short)2, msg->arcount);
  51
  52     /* cleanup */
  53     delete msg;
  54     msg = NULL;
  55 }
  56
  57 void testRFC1035::testParseAPacket()
  58 {
  59     /* Setup a buffer with the known-content packet */
  60     const char *buf = "\x76\xb1\x81\x80\x00\x01\x00\x01\x00\x02\x00\x02\x03\x77\x77\x77\x07\x67\x61\x6d\x65\x64\x65\x76\x03\x6e\x65\x74\x00\x00\x01\x00\x01\xc0\x0c\x00\x01\x00\x01\x00\x00\x00\xef\x00\x04\xd8\xb9\x60\xea\xc0\x10\x00\x02\x00\x01\x00\x00\x00\xef\x00\x0f\x03\x6e\x73\x32\x05\x7a\x77\x61\x76\x65\x03\x63\x6f\x6d\x00\xc0\x10\x00\x02\x00\x01\x00\x00\x00\xef\x00\x06\x03\x6e\x73\x31\xc0\x41\xc0\x3d\x00\x01\x00\x01\x00\x00\x29\x6b\x00\x04\xd8\xea\xee\x4a\xc0\x58\x00\x01\x00\x01\x00\x00\x29\x6b\x00\x04\xd8\xea\xee\x4b";
  61     size_t len = 126;
  62     rfc1035_message *msg = NULL;
  63     int res = 0;
  64
  65     /* Test the MessageUnpack function itself */
  66     res = rfc1035MessageUnpack(buf, len, &msg);
  67
  68     CPPUNIT_ASSERT_EQUAL(1, res);
  69     CPPUNIT_ASSERT(msg != NULL);
  70     /* cleanup */
  71     rfc1035MessageDestroy(&msg);
  72     CPPUNIT_ASSERT(msg == NULL);
  73 }
  74
  75 void testRFC1035::testBugPacketEndingOnCompressionPtr()
  76 {
  77     /* Setup a buffer with the known-to-fail packet */
  78     const char *buf = "\xec\x7b\x81\x80\x00\x01\x00\x01\x00\x00\x00\x00\x05\x62\x75\x72\x73\x74\x02\x74\x65\x06\x74\x61\x63\x6f\x64\x61\x03\x6e\x65\x74\x00\x00\x1c\x00\x01\xc0\x0c\x00\x05\x00\x01\x00\x00\x19\xe5\x00\x0a\x02\x74\x65\x04\x67\x73\x6c\x62\xc0\x15";
  79     size_t len = 59;
  80     rfc1035_message *msg = NULL;
  81     int res = 0;
  82     unsigned int off = 0;
  83
  84     /* Test the HeaderUnpack function results */
  85     msg = new rfc1035_message;
  86     res = rfc1035HeaderUnpack(buf, len, &off, msg);
  87     CPPUNIT_ASSERT(0 == res);
  88     CPPUNIT_ASSERT(0xec7b == msg->id);
  89     CPPUNIT_ASSERT(1 == msg->qr);
  90     /* flags */
  91     CPPUNIT_ASSERT(0 == msg->opcode);
  92     CPPUNIT_ASSERT(0 == msg->aa);
  93     CPPUNIT_ASSERT(0 == msg->tc);
  94     CPPUNIT_ASSERT(1 == msg->rd);
  95     CPPUNIT_ASSERT(1 == msg->ra);
  96     CPPUNIT_ASSERT(0 == msg->rcode);
  97     /* RR counts */
  98     CPPUNIT_ASSERT(1 == msg->qdcount);
  99     CPPUNIT_ASSERT(1 == msg->ancount);
 100     CPPUNIT_ASSERT(0 == msg->nscount);
 101     CPPUNIT_ASSERT(0 == msg->arcount);
 102     CPPUNIT_ASSERT(12 == off);
 103     printf("\n  Header : OK");
 104     /* cleanup */
 105     delete msg;
 106     msg = NULL;
 107
 108 // TODO explicitly test RR and Name unpack functions for this packet.
 109
 110     /* Test the MessageUnpack function itself */
 111     res = rfc1035MessageUnpack(buf, len, &msg);
 112
 113     CPPUNIT_ASSERT_EQUAL(1, res);
 114     CPPUNIT_ASSERT(msg != NULL);
 115     rfc1035MessageDestroy(&msg);
 116 }
 117
 118 void testRFC1035::testBugPacketHeadersOnly()
 119 {
 120     /* Setup a buffer with the known-to-fail headers-only packet */
 121     const char *buf = "\xab\xcd\x81\x80\x00\x01\x00\x05\x00\x04\x00\x04";
 122     size_t len = 12;
 123     rfc1035_message *msg = NULL;
 124     int res = 0;
 125     unsigned int off = 0;
 126
 127     /* Test the HeaderUnpack function results */
 128     msg = new rfc1035_message;
 129     res = rfc1035HeaderUnpack(buf, len, &off, msg);
 130     CPPUNIT_ASSERT(0 == res);
 131     /* cleanup */
 132     delete msg;
 133     msg = NULL;
 134
 135     /* Test the MessageUnpack function itself */
 136     res = rfc1035MessageUnpack(buf, len, &msg);
 137
 138     CPPUNIT_ASSERT(0 == memcmp("The DNS reply message is corrupt or could not be safely parsed.", rfc1035ErrorMessage(res), 63));
 139     CPPUNIT_ASSERT(res < 0);
 140     CPPUNIT_ASSERT(msg == NULL);
 141 }