610 lines
17 KiB
C
610 lines
17 KiB
C
/*
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* Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** @file
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*
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* DNS self-tests
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*
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*/
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/* Forcibly enable assertions */
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#undef NDEBUG
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#include <string.h>
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#include <assert.h>
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#include <ipxe/dns.h>
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#include <ipxe/test.h>
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/** Define inline data */
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#define DATA(...) { __VA_ARGS__ }
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/** A DNS encoding test */
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struct dns_encode_test {
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/** String */
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const char *string;
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/** Encoded string */
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const void *data;
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/** Length of encoded string */
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int len;
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};
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/**
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* Define a DNS encoding test
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*
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* @v _name Test name
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* @v _string Test string
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* @v _data Expected encoded data
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* @ret test DNS encoding test
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*/
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#define DNS_ENCODE( _name, _string, _data ) \
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static const uint8_t _name ## __data[] = _data; \
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static struct dns_encode_test _name = { \
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.string = _string, \
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.data = _name ## __data, \
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.len = sizeof ( _name ## __data ), \
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}
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/**
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* Report DNS encoding test result
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*
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* @v test DNS encoding test
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* @v file Test code file
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* @v line Test code line
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*/
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static void dns_encode_okx ( struct dns_encode_test *test, const char *file,
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unsigned int line ) {
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uint8_t data[ test->len ];
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struct dns_name name;
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int len;
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/* Check ability to determine length with no buffer */
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memset ( &name, 0, sizeof ( name ) );
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len = dns_encode ( test->string, &name );
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okx ( len >= 0, file, line );
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okx ( len == test->len, file, line );
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/* Check encoded name */
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name.data = data;
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name.len = sizeof ( data );
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len = dns_encode ( test->string, &name );
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okx ( len >= 0, file, line );
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if ( len >= 0 ) {
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okx ( len == test->len, file, line );
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okx ( memcmp ( data, test->data, test->len ) == 0, file, line );
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DBGC ( test, "DNS encoded \"%s\" to:\n", test->string );
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DBGC_HDA ( test, 0, data, len );
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}
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}
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#define dns_encode_ok( test ) dns_encode_okx ( test, __FILE__, __LINE__ )
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/**
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* Report DNS encoding failure test result
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*
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* @v test DNS encoding test
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* @v file Test code file
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* @v line Test code line
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*/
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static void dns_encode_fail_okx ( struct dns_encode_test *test,
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const char *file, unsigned int line ) {
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struct dns_name name = { .data = NULL, .len = 0 };
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int len;
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len = dns_encode ( test->string, &name );
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okx ( len < 0, file, line );
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}
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#define dns_encode_fail_ok( test ) \
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dns_encode_fail_okx ( test, __FILE__, __LINE__ )
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/** A DNS decoding test */
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struct dns_decode_test {
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/** Name */
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struct dns_name name;
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/** Expected string */
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const char *string;
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};
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/**
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* Define a DNS decoding test
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*
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* @v _name Test name
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* @v _data RFC1035-encoded data
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* @v _offset Starting offset within encoded data
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* @v _string Expected decoded string
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* @ret test DNS decoding test
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*/
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#define DNS_DECODE( _name, _data, _offset, _string ) \
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static uint8_t _name ## __data[] = _data; \
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static struct dns_decode_test _name = { \
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.name = { \
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.data = _name ## __data, \
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.offset = _offset, \
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.len = sizeof ( _name ## __data ), \
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}, \
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.string = _string, \
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}
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/**
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* Report DNS decoding test result
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*
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* @v test DNS decoding test
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* @v file Test code file
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* @v line Test code line
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*/
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static void dns_decode_okx ( struct dns_decode_test *test, const char *file,
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unsigned int line ) {
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char string[ strlen ( test->string ) + 1 /* NUL */ ];
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int len;
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/* Check ability to determine length with no buffer */
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len = dns_decode ( &test->name, NULL, 0 );
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okx ( len >= 0, file, line );
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okx ( len == ( ( int ) strlen ( test->string ) ), file, line );
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/* Check decoded string */
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len = dns_decode ( &test->name, string, sizeof ( string ) );
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okx ( len >= 0, file, line );
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if ( len >= 0 ) {
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okx ( strcmp ( string, test->string ) == 0, file, line );
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DBGC ( test, "DNS decoded \"%s\" from offset %#zx in:\n",
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string, test->name.offset );
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DBGC_HDA ( test, 0, test->name.data, test->name.len );
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}
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}
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#define dns_decode_ok( test ) dns_decode_okx ( test, __FILE__, __LINE__ )
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/**
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* Report DNS decoding failure test result
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*
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* @v test DNS decoding test
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* @v file Test code file
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* @v line Test code line
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*/
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static void dns_decode_fail_okx ( struct dns_decode_test *test,
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const char *file, unsigned int line ) {
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int len;
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len = dns_decode ( &test->name, NULL, 0 );
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okx ( len < 0, file, line );
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}
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#define dns_decode_fail_ok( test ) \
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dns_decode_fail_okx ( test, __FILE__, __LINE__ )
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/** A DNS comparison test */
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struct dns_compare_test {
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/** First name */
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struct dns_name first;
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/** Second name */
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struct dns_name second;
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};
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/**
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* Define a DNS comparison test
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*
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* @v _name Test name
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* @v _first_data First RFC1035-encoded data
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* @v _first_offset Starting offset within first encoded data
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* @v _second_data Second RFC1035-encoded data
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* @v _second_offset Starting offset within second encoded data
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* @ret test DNS comparison test
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*/
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#define DNS_COMPARE( _name, _first_data, _first_offset, _second_data, \
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_second_offset ) \
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static uint8_t _name ## __first_data[] = _first_data; \
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static uint8_t _name ## __second_data[] = _second_data; \
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static struct dns_compare_test _name = { \
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.first = { \
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.data = _name ## __first_data, \
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.offset = _first_offset, \
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.len = sizeof ( _name ## __first_data ), \
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}, \
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.second = { \
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.data = _name ## __second_data, \
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.offset = _second_offset, \
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.len = sizeof ( _name ## __second_data ), \
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}, \
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}
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/**
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* Report DNS comparison test result
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*
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* @v test DNS comparison test
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* @v file Test code file
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* @v line Test code line
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*/
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static void dns_compare_okx ( struct dns_compare_test *test, const char *file,
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unsigned int line ) {
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okx ( dns_compare ( &test->first, &test->second ) == 0, file, line );
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}
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#define dns_compare_ok( test ) dns_compare_okx ( test, __FILE__, __LINE__ )
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/**
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* Report DNS comparison test failure result
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*
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* @v test DNS comparison test
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* @v file Test code file
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* @v line Test code line
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*/
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static void dns_compare_fail_okx ( struct dns_compare_test *test,
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const char *file, unsigned int line ) {
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okx ( dns_compare ( &test->first, &test->second ) != 0, file, line );
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}
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#define dns_compare_fail_ok( test ) \
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dns_compare_fail_okx ( test, __FILE__, __LINE__ )
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/** A DNS copying test */
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struct dns_copy_test {
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/** Source name */
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struct dns_name src;
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/** Expected copied name */
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struct dns_name dst;
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};
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/**
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* Define a DNS copying test
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*
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* @v _name Test name
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* @v _src_data Source RFC1035-encoded data
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* @v _src_offset Starting offset within source encoded data
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* @v _dst_data Expected copied RFC1035-encoded data
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* @v _dst_offset Starting offset withint copied encoded data
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* @ret test DNS copying test
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*/
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#define DNS_COPY( _name, _src_data, _src_offset, _dst_data, \
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_dst_offset ) \
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static uint8_t _name ## __src_data[] = _src_data; \
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static uint8_t _name ## __dst_data[] = _dst_data; \
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static struct dns_copy_test _name = { \
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.src = { \
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.data = _name ## __src_data, \
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.offset = _src_offset, \
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.len = sizeof ( _name ## __src_data ), \
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}, \
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.dst = { \
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.data = _name ## __dst_data, \
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.offset = _dst_offset, \
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.len = sizeof ( _name ## __dst_data ), \
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}, \
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}
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/**
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* Report a DNS copying test result
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*
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* @v test DNS copying test
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* @v file Test code file
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* @v line Test code line
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*/
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static void dns_copy_okx ( struct dns_copy_test *test,
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const char *file, unsigned int line ) {
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uint8_t data[ test->dst.len ];
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struct dns_name dst;
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int len;
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/* Check ability to determine length with no buffer */
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memset ( &dst, 0, sizeof ( dst ) );
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len = dns_copy ( &test->src, &dst );
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okx ( len >= 0, file, line );
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okx ( len == ( ( int ) ( test->dst.len - test->dst.offset ) ),
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file, line );
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/* Check copied name */
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dst.data = data;
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dst.offset = test->dst.offset;
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dst.len = sizeof ( data );
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memcpy ( dst.data, test->dst.data, test->dst.offset );
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len = dns_copy ( &test->src, &dst );
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okx ( len >= 0, file, line );
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okx ( len == ( ( int ) ( test->dst.len - test->dst.offset ) ),
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file, line );
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okx ( memcmp ( data, test->dst.data, sizeof ( data ) ) == 0,
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file, line );
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DBGC ( test, "DNS copied:\n" );
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DBGC_HDA ( test, 0, test->src.data, test->src.len );
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DBGC_HDA ( test, 0, data, ( test->dst.offset + len ) );
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}
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#define dns_copy_ok( test ) dns_copy_okx ( test, __FILE__, __LINE__ )
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/**
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* Report a DNS copying failure test result
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*
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* @v test DNS copying test
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* @v file Test code file
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* @v line Test code line
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*/
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static void dns_copy_fail_okx ( struct dns_copy_test *test,
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const char *file, unsigned int line ) {
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struct dns_name dst;
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int len;
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memset ( &dst, 0, sizeof ( dst ) );
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len = dns_copy ( &test->src, &dst );
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okx ( len < 0, file, line );
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}
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#define dns_copy_fail_ok( test ) dns_copy_fail_okx ( test, __FILE__, __LINE__ )
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/** A DNS search list test */
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struct dns_list_test {
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/** Search list */
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struct dns_name list;
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/** Expected decoded search list */
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const char **strings;
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/** Number of expected decoded string */
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unsigned int count;
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};
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/**
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* Define a DNS search list test
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*
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* @v _name Test name
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* @v _list RFC1035-encoded data
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* @v _strings Expected decoded strings
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* @ret test DNS search list test
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*/
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#define DNS_LIST( _name, _list, _strings ) \
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static uint8_t _name ## __list[] = _list; \
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static const char * _name ## __strings[] = _strings; \
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static struct dns_list_test _name = { \
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.list = { \
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.data = _name ## __list, \
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.offset = 0, \
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.len = sizeof ( _name ## __list ), \
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}, \
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.strings = _name ## __strings, \
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.count = ( sizeof ( _name ## __strings ) / \
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sizeof ( _name ## __strings[0] ) ), \
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}
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/**
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* Report DNS search list test result
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*
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* @v test DNS search list test
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* @v file Test code file
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* @v line Test code line
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*/
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static void dns_list_okx ( struct dns_list_test *test, const char *file,
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unsigned int line ) {
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struct dns_name name;
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unsigned int i;
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DBGC ( test, "DNS search list:\n" );
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DBGC_HDA ( test, 0, test->list.data, test->list.len );
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memcpy ( &name, &test->list, sizeof ( name ) );
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for ( i = 0 ; i < test->count ; i++ ) {
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char buf[ strlen ( test->strings[i] ) + 1 /* NUL */ ];
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int len;
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int offset;
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/* Decode this name */
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len = dns_decode ( &name, buf, sizeof ( buf ) );
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okx ( len >= 0, file, line );
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if ( len >= 0 ) {
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okx ( len == ( ( int ) strlen ( test->strings[i] ) ),
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file, line );
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okx ( strcmp ( buf, test->strings[i] ) == 0,
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file, line );
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DBGC ( test, "DNS search list found \"%s\" at offset "
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"%#zx\n", buf, name.offset );
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}
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/* Skip to next name */
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offset = dns_skip ( &name );
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okx ( offset >= 0, file, line );
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name.offset = offset;
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}
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/* Check that we have consumed the whole search list */
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okx ( name.offset == name.len, file, line );
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}
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#define dns_list_ok( test ) dns_list_okx ( test, __FILE__, __LINE__ )
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/* Simple encoding test */
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DNS_ENCODE ( encode_simple, "ipxe.org",
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DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ) );
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/* Single-word encoding test */
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DNS_ENCODE ( encode_single, "foo", DATA ( 3, 'f', 'o', 'o', 0 ) );
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/* Absolute encoding test */
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DNS_ENCODE ( encode_absolute, "git.ipxe.org.",
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DATA ( 3, 'g', 'i', 't', 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g',
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0 ) );
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/* Empty string encoding test */
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DNS_ENCODE ( encode_empty, "", DATA ( 0 ) );
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/* Root domain encoding test */
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DNS_ENCODE ( encode_root, ".", DATA ( 0 ) );
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/* Invalid initial dot encoding test */
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DNS_ENCODE ( encode_initial_dot, ".foo", DATA() );
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/* Invalid double dot encoding test */
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DNS_ENCODE ( encode_double_dot, "ipxe..org", DATA() );
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/* Invalid solo double dot encoding test */
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DNS_ENCODE ( encode_solo_double_dot, "..", DATA() );
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/* Invalid trailing double dot encoding test */
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DNS_ENCODE ( encode_trailing_double_dot, "ipxe.org..", DATA() );
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/* Invalid overlength label encoding test */
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DNS_ENCODE ( encode_overlength,
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"this-label-is-maliciously-long-in-an-attempt-to-overflow-the-"
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"length-field-and-generate-a-length-which-looks-like-a-"
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"compression-pointer", DATA() );
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/* Simple decoding test */
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DNS_DECODE ( decode_simple,
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DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0,
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"ipxe.org" );
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/* Compression pointer decoding test */
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DNS_DECODE ( decode_ptr,
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DATA ( 3, 'o', 'r', 'g', 0, 3, 'g', 'i', 't', 4, 'i', 'p', 'x',
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'e', 0xc0, 0x00 ), 5,
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"git.ipxe.org" );
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/* Root decoding test */
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DNS_DECODE ( decode_root,
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DATA ( 0 ), 0, "" );
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/* Incomplete name decoding test */
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DNS_DECODE ( decode_incomplete_name,
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DATA ( 4, 'i', 'p', 'x', 'e' ), 0, NULL );
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/* Incomplete label decoding test */
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DNS_DECODE ( decode_incomplete_label,
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DATA ( 4, 'i', 'p', 'x' ), 0, NULL );
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/* Incomplete compression pointer decoding test */
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DNS_DECODE ( decode_incomplete_ptr,
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DATA ( 3, 'o', 'r', 'g', 0, 4, 'i', 'p', 'x', 'e', 0xc0 ), 5,
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NULL );
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/* Forward reference decoding test */
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DNS_DECODE ( decode_forward,
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DATA ( 0xc0, 0x02, 3, 'f', 'o', 'o', 0 ), 0, NULL );
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/* Infinite loop decoding test */
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DNS_DECODE ( decode_infinite,
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DATA ( 4, 'i', 'p', 'x', 'e', 0xc0, 0x00 ), 0, NULL );
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/* Empty decoding test */
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DNS_DECODE ( decode_empty,
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DATA (), 0, NULL );
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/* Simple comparison test */
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DNS_COMPARE ( compare_simple,
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DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0,
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DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0 );
|
|
|
|
/* Compression pointer comparison test */
|
|
DNS_COMPARE ( compare_ptr,
|
|
DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0,
|
|
DATA ( 3, 'o', 'r', 'g', 0, 4, 'i', 'p', 'x', 'e',
|
|
0xc0, 0x00 ), 5 );
|
|
|
|
/* Case insensitive comparison test */
|
|
DNS_COMPARE ( compare_case,
|
|
DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0,
|
|
DATA ( 4, 'i', 'p', 'x', 'e', 3, 'O', 'R', 'G', 0 ), 0 );
|
|
|
|
/* Mismatch comparison test */
|
|
DNS_COMPARE ( compare_mismatch,
|
|
DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0,
|
|
DATA ( 4, 'g', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0 );
|
|
|
|
/* Infinite loop comparison test */
|
|
DNS_COMPARE ( compare_infinite,
|
|
DATA ( 3, 'f', 'o', 'o', 0xc0, 0x00 ), 0,
|
|
DATA ( 3, 'f', 'o', 'o', 0xc0, 0x00 ), 0 );
|
|
|
|
/* Simple copying test */
|
|
DNS_COPY ( copy_simple,
|
|
DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0,
|
|
DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0 );
|
|
|
|
/* Simple copying test with offset */
|
|
DNS_COPY ( copy_offset,
|
|
DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0 ), 0,
|
|
DATA ( 'f', 'o', 'o', 0, 4, 'i', 'p', 'x', 'e',
|
|
3, 'o', 'r', 'g', 0 ), 4 );
|
|
|
|
/* Compression pointer copying test */
|
|
DNS_COPY ( copy_ptr,
|
|
DATA ( 3, 'o', 'r', 'g', 0, 3, 'g', 'i', 't', 4, 'i', 'p', 'x', 'e',
|
|
0xc0, 0x00 ), 5,
|
|
DATA ( 3, 'g', 'i', 't', 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g',
|
|
0 ), 0 );
|
|
|
|
/* Infinite loop copying test */
|
|
DNS_COPY ( copy_infinite,
|
|
DATA ( 4, 'l', 'o', 'o', 'p', 7, 'f', 'o', 'r', 'e', 'v', 'e', 'r',
|
|
0xc0, 0x05 ), 0,
|
|
DATA (), 0 );
|
|
|
|
/* DNS search list test */
|
|
DNS_LIST ( search,
|
|
DATA ( 4, 'i', 'p', 'x', 'e', 3, 'o', 'r', 'g', 0,
|
|
4, 'b', 'o', 'o', 't', 0xc0, 0x00,
|
|
3, 'd', 'e', 'v', 0xc0, 0x0a,
|
|
11, 'n', 'e', 't', 'w', 'o', 'r', 'k', 'b', 'o', 'o', 't',
|
|
0xc0, 0x05 ),
|
|
DATA ( "ipxe.org", "boot.ipxe.org", "dev.boot.ipxe.org",
|
|
"networkboot.org" ) );
|
|
|
|
/**
|
|
* Perform DNS self-test
|
|
*
|
|
*/
|
|
static void dns_test_exec ( void ) {
|
|
|
|
/* Encoding tests */
|
|
dns_encode_ok ( &encode_simple );
|
|
dns_encode_ok ( &encode_single );
|
|
dns_encode_ok ( &encode_absolute );
|
|
dns_encode_ok ( &encode_empty );
|
|
dns_encode_ok ( &encode_root );
|
|
dns_encode_fail_ok ( &encode_initial_dot );
|
|
dns_encode_fail_ok ( &encode_double_dot );
|
|
dns_encode_fail_ok ( &encode_solo_double_dot );
|
|
dns_encode_fail_ok ( &encode_trailing_double_dot );
|
|
dns_encode_fail_ok ( &encode_overlength );
|
|
|
|
/* Decoding tests */
|
|
dns_decode_ok ( &decode_simple );
|
|
dns_decode_ok ( &decode_ptr );
|
|
dns_decode_ok ( &decode_root );
|
|
dns_decode_fail_ok ( &decode_incomplete_name );
|
|
dns_decode_fail_ok ( &decode_incomplete_label );
|
|
dns_decode_fail_ok ( &decode_incomplete_ptr );
|
|
dns_decode_fail_ok ( &decode_forward );
|
|
dns_decode_fail_ok ( &decode_infinite );
|
|
dns_decode_fail_ok ( &decode_empty );
|
|
|
|
/* Comparison tests */
|
|
dns_compare_ok ( &compare_simple );
|
|
dns_compare_ok ( &compare_ptr );
|
|
dns_compare_ok ( &compare_case );
|
|
dns_compare_fail_ok ( &compare_mismatch );
|
|
dns_compare_fail_ok ( &compare_infinite );
|
|
|
|
/* Copying tests */
|
|
dns_copy_ok ( ©_simple );
|
|
dns_copy_ok ( ©_offset );
|
|
dns_copy_ok ( ©_ptr );
|
|
dns_copy_fail_ok ( ©_infinite );
|
|
|
|
/* Search list tets */
|
|
dns_list_ok ( &search );
|
|
}
|
|
|
|
/** DNS self-test */
|
|
struct self_test dns_test __self_test = {
|
|
.name = "dns",
|
|
.exec = dns_test_exec,
|
|
};
|