--- /dev/null
+/*
+ * 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>
+
+/** Number of sample iterations for profiling */
+#define PROFILE_COUNT 16
+
+/** 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
+ * @v file Test code file
+ * @v line Test code line
+ */
+static void tcpip_okx ( struct tcpip_test *test, const char *file,
+ unsigned int line ) {
+ uint16_t expected;
+ uint16_t generic_sum;
+ uint16_t sum;
+
+ /* Verify generic_tcpip_continue_chksum() result */
+ expected = rfc_tcpip_chksum ( test->data, test->len );
+ generic_sum = generic_tcpip_continue_chksum ( TCPIP_EMPTY_CSUM,
+ test->data, test->len );
+ okx ( generic_sum == expected, file, line );
+
+ /* Verify optimised tcpip_continue_chksum() result */
+ sum = tcpip_continue_chksum ( TCPIP_EMPTY_CSUM, test->data, test->len );
+ okx ( sum == expected, file, line );
+}
+#define tcpip_ok( test ) tcpip_okx ( test, __FILE__, __LINE__ )
+
+/**
+ * Report TCP/IP pseudorandom-data test result
+ *
+ * @v test TCP/IP test
+ * @v file Test code file
+ * @v line Test code line
+ */
+static void tcpip_random_okx ( struct tcpip_random_test *test,
+ const char *file, unsigned int line ) {
+ uint8_t *data = ( tcpip_data + test->offset );
+ struct profiler profiler;
+ uint16_t expected;
+ uint16_t generic_sum;
+ uint16_t sum;
+ unsigned int i;
+
+ /* Sanity check */
+ assert ( ( test->len + test->offset ) <= sizeof ( tcpip_data ) );
+
+ /* Generate random data */
+ srandom ( test->seed );
+ for ( i = 0 ; i < test->len ; i++ )
+ data[i] = random();
+
+ /* Verify generic_tcpip_continue_chksum() result */
+ expected = rfc_tcpip_chksum ( data, test->len );
+ generic_sum = generic_tcpip_continue_chksum ( TCPIP_EMPTY_CSUM,
+ data, test->len );
+ okx ( generic_sum == expected, file, line );
+
+ /* Verify optimised tcpip_continue_chksum() result */
+ sum = tcpip_continue_chksum ( TCPIP_EMPTY_CSUM, data, test->len );
+ okx ( sum == expected, file, line );
+
+ /* Profile optimised calculation */
+ memset ( &profiler, 0, sizeof ( profiler ) );
+ for ( i = 0 ; i < PROFILE_COUNT ; i++ ) {
+ profile_start ( &profiler );
+ sum = tcpip_continue_chksum ( TCPIP_EMPTY_CSUM, data,
+ test->len );
+ profile_stop ( &profiler );
+ }
+ DBG ( "TCPIP checksummed %zd bytes (+%zd) in %ld +/- %ld ticks\n",
+ test->len, test->offset, profile_mean ( &profiler ),
+ profile_stddev ( &profiler ) );
+}
+#define tcpip_random_ok( test ) tcpip_random_okx ( test, __FILE__, __LINE__ )
+
+/**
+ * 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,
+};
Code Review / kvmfornfv.git / blobdiff