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/*
* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
/** @file
*
* TCP/IP self-tests
*
*/
/* Forcibly enable assertions */
#undef NDEBUG
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ipxe/test.h>
#include <ipxe/profile.h>
#include <ipxe/tcpip.h>
/** A TCP/IP fixed-data test */
struct tcpip_test {
/** Data */
const void *data;
/** Length of data */
size_t len;
};
/** A TCP/IP pseudorandom-data test */
struct tcpip_random_test {
/** Seed */
unsigned int seed;
/** Length of data */
size_t len;
/** Alignment offset */
size_t offset;
};
/** Define inline data */
#define DATA(...) { __VA_ARGS__ }
/** Define a TCP/IP fixed-data test */
#define TCPIP_TEST( name, DATA ) \
static const uint8_t __attribute__ (( aligned ( 16 ) )) \
name ## _data[] = DATA; \
static struct tcpip_test name = { \
.data = name ## _data, \
.len = sizeof ( name ## _data ), \
}
/** Define a TCP/IP pseudorandom-data test */
#define TCPIP_RANDOM_TEST( name, SEED, LEN, OFFSET ) \
static struct tcpip_random_test name = { \
.seed = SEED, \
.len = LEN, \
.offset = OFFSET, \
}
/** Buffer for pseudorandom-data tests */
static uint8_t __attribute__ (( aligned ( 16 ) ))
tcpip_data[ 4096 + 7 /* offset */ ];
/** Empty data */
TCPIP_TEST ( empty, DATA() );
/** Single byte */
TCPIP_TEST ( one_byte, DATA ( 0xeb ) );
/** Double byte */
TCPIP_TEST ( two_bytes, DATA ( 0xba, 0xbe ) );
/** Final wrap-around carry (big-endian) */
TCPIP_TEST ( final_carry_big,
DATA ( 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 ) );
/** Final wrap-around carry (little-endian) */
TCPIP_TEST ( final_carry_little,
DATA ( 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00 ) );
/** Random data (aligned) */
TCPIP_RANDOM_TEST ( random_aligned, 0x12345678UL, 4096, 0 );
/** Random data (unaligned, +1) */
TCPIP_RANDOM_TEST ( random_unaligned_1, 0x12345678UL, 4096, 1 );
/** Random data (unaligned, +2) */
TCPIP_RANDOM_TEST ( random_unaligned_2, 0x12345678UL, 4096, 2 );
/** Random data (aligned, truncated) */
TCPIP_RANDOM_TEST ( random_aligned_truncated, 0x12345678UL, 4095, 0 );
/** Random data (unaligned start and finish) */
TCPIP_RANDOM_TEST ( partial, 0xcafebabe, 121, 5 );
/**
* Calculate TCP/IP checksum
*
* @v data Data to sum
* @v len Length of data
* @ret cksum Checksum
*
* This is a reference implementation taken from RFC1071 (and modified
* to fix compilation without warnings under gcc).
*/
static uint16_t rfc_tcpip_chksum ( const void *data, size_t len ) {
unsigned long sum = 0;
while ( len > 1 ) {
sum += *( ( uint16_t * ) data );
data += 2;
len -= 2;
}
if ( len > 0 )
sum += *( ( uint8_t * ) data );
while ( sum >> 16 )
sum = ( ( sum & 0xffff ) + ( sum >> 16 ) );
return ~sum;
}
/**
* Report TCP/IP fixed-data test result
*
* @v test TCP/IP test
*/
#define tcpip_ok( test ) do { \
uint16_t expected; \
uint16_t generic_sum; \
uint16_t sum; \
expected = rfc_tcpip_chksum ( (test)->data, (test)->len ); \
generic_sum = generic_tcpip_continue_chksum ( TCPIP_EMPTY_CSUM, \
(test)->data, \
(test)->len ); \
ok ( generic_sum == expected ); \
sum = tcpip_continue_chksum ( TCPIP_EMPTY_CSUM, (test)->data, \
(test)->len ); \
ok ( sum == expected ); \
} while ( 0 )
/**
* Report TCP/IP pseudorandom-data test result
*
* @v test TCP/IP test
*/
#define tcpip_random_ok( test ) do { \
uint8_t *data = ( tcpip_data + (test)->offset ); \
uint16_t expected; \
uint16_t generic_sum; \
uint16_t sum; \
unsigned long elapsed; \
unsigned int i; \
assert ( ( (test)->len + (test)->offset ) <= \
sizeof ( tcpip_data ) ); \
srandom ( (test)->seed ); \
for ( i = 0 ; i < (test)->len ; i++ ) \
data[i] = random(); \
expected = rfc_tcpip_chksum ( data, (test)->len ); \
generic_sum = generic_tcpip_continue_chksum ( TCPIP_EMPTY_CSUM, \
data, \
(test)->len ); \
ok ( generic_sum == expected ); \
simple_profile(); \
sum = tcpip_continue_chksum ( TCPIP_EMPTY_CSUM, data, \
(test)->len ); \
elapsed = simple_profile(); \
ok ( sum == expected ); \
DBG ( "TCPIP checksummed %zd bytes (+%zd) in %ld ticks\n", \
(test)->len, (test)->offset, elapsed ); \
} while ( 0 )
/**
* Perform TCP/IP self-tests
*
*/
static void tcpip_test_exec ( void ) {
tcpip_ok ( &empty );
tcpip_ok ( &one_byte );
tcpip_ok ( &two_bytes );
tcpip_ok ( &final_carry_big );
tcpip_ok ( &final_carry_little );
tcpip_random_ok ( &random_aligned );
tcpip_random_ok ( &random_unaligned_1 );
tcpip_random_ok ( &random_unaligned_2 );
tcpip_random_ok ( &random_aligned_truncated );
tcpip_random_ok ( &partial );
}
/** TCP/IP self-test */
struct self_test tcpip_test __self_test = {
.name = "tcpip",
.exec = tcpip_test_exec,
};
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