lib/tests/testRFC1035.cc

   1 /*
   2  * Copyright (C) 1996-2015 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 #include "unitTestMain.h"
  12
  13 #include <cassert>
  14
  15 /* Being a C library code it is best bodily included and tested with C++ type-safe techniques. */
  16 #include "lib/rfc1035.c"
  17 #include "lib/rfc2671.c"
  18
  19 CPPUNIT_TEST_SUITE_REGISTRATION( testRFC1035 );
  20
  21 // TODO Test each function in the Library independently
  22 //  Just because we can for global functions.
  23 //  It's good for the code too.
  24
  25 void testRFC1035::testHeaderUnpack()
  26 {
  27     /* Setup a buffer with the known-content packet */
  28     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";
  29     size_t len = 126;
  30     rfc1035_message *msg = NULL;
  31     int res = 0;
  32     unsigned int off = 0;
  33
  34     /* Test the HeaderUnpack function */
  35     msg = new rfc1035_message;
  36     res = rfc1035HeaderUnpack(buf, len, &off, msg);
  37     CPPUNIT_ASSERT(res == 0);
  38     CPPUNIT_ASSERT_EQUAL((short unsigned int)0x76b1, msg->id);
  39     CPPUNIT_ASSERT(msg->qr == 1);
  40     /* flags */
  41     CPPUNIT_ASSERT_EQUAL((unsigned int)0, msg->opcode);
  42     CPPUNIT_ASSERT_EQUAL((unsigned int)0, msg->aa);
  43     CPPUNIT_ASSERT_EQUAL((unsigned int)0, msg->tc);
  44     CPPUNIT_ASSERT_EQUAL((unsigned int)1, msg->rd);
  45     CPPUNIT_ASSERT_EQUAL((unsigned int)1, msg->ra);
  46     CPPUNIT_ASSERT_EQUAL((unsigned int)0, msg->rcode);
  47     /* RR counts */
  48     CPPUNIT_ASSERT_EQUAL((unsigned short)1, msg->qdcount);
  49     CPPUNIT_ASSERT_EQUAL((unsigned short)1, msg->ancount);
  50     CPPUNIT_ASSERT_EQUAL((unsigned short)2, msg->nscount);
  51     CPPUNIT_ASSERT_EQUAL((unsigned short)2, msg->arcount);
  52
  53     /* cleanup */
  54     delete msg;
  55     msg = NULL;
  56 }
  57
  58 void testRFC1035::testParseAPacket()
  59 {
  60     /* Setup a buffer with the known-content packet */
  61     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";
  62     size_t len = 126;
  63     rfc1035_message *msg = NULL;
  64     int res = 0;
  65
  66     /* Test the MessageUnpack function itself */
  67     res = rfc1035MessageUnpack(buf, len, &msg);
  68
  69     CPPUNIT_ASSERT_EQUAL(1, res);
  70     CPPUNIT_ASSERT(msg != NULL);
  71     /* cleanup */
  72     rfc1035MessageDestroy(&msg);
  73     CPPUNIT_ASSERT(msg == NULL);
  74 }
  75
  76 void testRFC1035::testBugPacketEndingOnCompressionPtr()
  77 {
  78     /* Setup a buffer with the known-to-fail packet */
  79     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";
  80     size_t len = 59;
  81     rfc1035_message *msg = NULL;
  82     int res = 0;
  83     unsigned int off = 0;
  84
  85     /* Test the HeaderUnpack function results */
  86     msg = new rfc1035_message;
  87     res = rfc1035HeaderUnpack(buf, len, &off, msg);
  88     CPPUNIT_ASSERT(0 == res);
  89     CPPUNIT_ASSERT(0xec7b == msg->id);
  90     CPPUNIT_ASSERT(1 == msg->qr);
  91     /* flags */
  92     CPPUNIT_ASSERT(0 == msg->opcode);
  93     CPPUNIT_ASSERT(0 == msg->aa);
  94     CPPUNIT_ASSERT(0 == msg->tc);
  95     CPPUNIT_ASSERT(1 == msg->rd);
  96     CPPUNIT_ASSERT(1 == msg->ra);
  97     CPPUNIT_ASSERT(0 == msg->rcode);
  98     /* RR counts */
  99     CPPUNIT_ASSERT(1 == msg->qdcount);
 100     CPPUNIT_ASSERT(1 == msg->ancount);
 101     CPPUNIT_ASSERT(0 == msg->nscount);
 102     CPPUNIT_ASSERT(0 == msg->arcount);
 103     CPPUNIT_ASSERT(12 == off);
 104     printf("\n  Header : OK");
 105     /* cleanup */
 106     delete msg;
 107     msg = NULL;
 108
 109 // TODO explicitly test RR and Name unpack functions for this packet.
 110
 111     /* Test the MessageUnpack function itself */
 112     res = rfc1035MessageUnpack(buf, len, &msg);
 113
 114     CPPUNIT_ASSERT_EQUAL(1, res);
 115     CPPUNIT_ASSERT(msg != NULL);
 116     rfc1035MessageDestroy(&msg);
 117 }
 118
 119 void testRFC1035::testBugPacketHeadersOnly()
 120 {
 121     /* Setup a buffer with the known-to-fail headers-only packet */
 122     const char *buf = "\xab\xcd\x81\x80\x00\x01\x00\x05\x00\x04\x00\x04";
 123     size_t len = 12;
 124     rfc1035_message *msg = NULL;
 125     int res = 0;
 126     unsigned int off = 0;
 127
 128     /* Test the HeaderUnpack function results */
 129     msg = new rfc1035_message;
 130     res = rfc1035HeaderUnpack(buf, len, &off, msg);
 131     CPPUNIT_ASSERT(0 == res);
 132     /* cleanup */
 133     delete msg;
 134     msg = NULL;
 135
 136     /* Test the MessageUnpack function itself */
 137     res = rfc1035MessageUnpack(buf, len, &msg);
 138
 139     CPPUNIT_ASSERT(0 == memcmp("The DNS reply message is corrupt or could not be safely parsed.", rfc1035ErrorMessage(res), 63));
 140     CPPUNIT_ASSERT(res < 0);
 141     CPPUNIT_ASSERT(msg == NULL);
 142 }
 143