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Diffstat (limited to 'src/test/ao_fec_test.c')
-rw-r--r--src/test/ao_fec_test.c386
1 files changed, 386 insertions, 0 deletions
diff --git a/src/test/ao_fec_test.c b/src/test/ao_fec_test.c
new file mode 100644
index 00000000..216a4b79
--- /dev/null
+++ b/src/test/ao_fec_test.c
@@ -0,0 +1,386 @@
+/*
+ * Copyright © 2012 Keith Packard <keithp@keithp.com>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <ao_fec.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+
+#ifndef RANDOM_MAX
+#define RANDOM_MAX 0x7fffffff
+#endif
+
+static double
+rand_real(void) {
+ return (double) random() / (double) RANDOM_MAX;
+}
+
+static double
+gaussian_random(double mean, double dev)
+{
+ static int save_x_valid = 0;
+ static double save_x;
+ double x;
+
+ if (save_x_valid)
+ {
+ x = save_x;
+ save_x_valid = 0;
+ }
+ else
+ {
+ double w;
+ double normal_x1, normal_x2;
+
+ do {
+ normal_x1 = 2 * rand_real () - 1;
+ normal_x2 = 2 * rand_real () - 1;
+ w = normal_x1*normal_x1 + normal_x2*normal_x2;
+ } while (w >= 1 || w < 1E-30);
+
+ w = sqrt(log(w)*(-2./w));
+
+ /*
+ * normal_x1 and normal_x2 are independent normally
+ * distributed variates
+ */
+
+ x = normal_x1 * w;
+ /* save normal_x2 for next call */
+ save_x = normal_x2 * w;
+ save_x_valid = 1;
+ }
+ return x * dev + mean;
+}
+
+#define PREPARE_LEN(input_len) ((input_len) + AO_FEC_PREPARE_EXTRA)
+#define ENCODE_LEN(input_len) (PREPARE_LEN(input_len) * 2)
+#define DECODE_LEN(input_len) ((input_len) + AO_FEC_PREPARE_EXTRA)
+#define EXPAND_LEN(input_len) (ENCODE_LEN(input_len) * 8)
+
+static uint8_t ao_bit(uint8_t b) {
+ if (b)
+ return 0x00;
+ return 0xff;
+}
+
+static int
+ao_expand(uint8_t *bits, int bits_len, uint8_t *bytes)
+{
+ int i, bit;
+ uint8_t b;
+
+ for (i = 0; i < bits_len; i++) {
+ b = bits[i];
+ for (bit = 7; bit >= 0; bit--)
+ *bytes++ = ao_bit ((b >> bit) & 1);
+ }
+
+ return bits_len * 8;
+}
+
+static int
+ao_fuzz (uint8_t *in, int in_len, uint8_t *out, double dev)
+{
+ int i;
+ int errors = 0;
+ int s;
+
+ for (i = 0; i < in_len; i++) {
+ double error = gaussian_random(0, dev);
+ uint8_t byte = in[i];
+
+ if (error > 0) {
+ if (error > 0xff)
+ error = 0xff;
+ if (error >= 0x80)
+ errors++;
+ if (byte < 0x80)
+ byte += error;
+ else
+ byte -= error;
+ }
+
+ /* abcd efgh 8
+ * abcd efga 7
+ * abcd efab 6
+ * abcd eabc 5
+ * abcd abcd 4
+ * abca bcab 3
+ * abab abab 2
+ * aaaa aaaa 1
+ */
+
+#define SAVE 8
+#define SAVE_MASK (((1 << SAVE) - 1) << (8 - SAVE))
+
+ byte &= SAVE_MASK;
+ for (s = SAVE; s < 8; s += SAVE)
+ byte |= byte >> s;
+
+ out[i] = byte;
+ }
+ return errors;
+}
+
+static uint8_t
+ao_random_data(uint8_t *out, uint8_t out_len)
+{
+ uint8_t len = random() % (out_len + 1);
+ uint8_t i;
+
+ for (i = 0; i < len; i++)
+ out[i] = random();
+ return len;
+}
+
+
+static uint8_t real_packet[] = {
+ 0x40, 0x38, 0xcd, 0x38, 0x3d, 0x34, 0xca, 0x31, 0xc3, 0xc1, 0xc6, 0x35, 0xcc, 0x3a, 0x3c,
+ 0x3c, 0x3d, 0x3c, 0x37, 0xc5, 0xc1, 0xc0, 0xc1, 0xc1, 0xc3, 0xc0, 0xc1, 0xc6, 0x38, 0x3b, 0xc6,
+ 0xc0, 0xc6, 0x32, 0xc9, 0xc9, 0x34, 0xcf, 0x35, 0xcf, 0x3a, 0x3b, 0xc6, 0xc7, 0x35, 0xcf, 0x36,
+ 0xce, 0x37, 0xc8, 0xc8, 0x3a, 0x3c, 0xc9, 0xc8, 0x3a, 0x3c, 0xcc, 0x32, 0xcd, 0x32, 0xce, 0x32,
+ 0xc9, 0xc6, 0x37, 0x3e, 0x3d, 0xc8, 0xc3, 0xc6, 0x38, 0x3d, 0xcf, 0x34, 0x3d, 0x3b, 0xcb, 0x31,
+ 0xca, 0x35, 0x38, 0xcb, 0x31, 0xcc, 0x31, 0x3b, 0xc7, 0xbf, 0xbe, 0xbe, 0xc3, 0x35, 0x38, 0xcb,
+ 0x2f, 0xc9, 0xc2, 0x34, 0x3c, 0xcc, 0x31, 0xca, 0xc1, 0xc0, 0xc3, 0x33, 0x3f, 0x3f, 0x3e, 0x3c,
+ 0xcc, 0x31, 0xcc, 0xc3, 0xc4, 0x32, 0xd1, 0x34, 0x3f, 0x3c, 0xcc, 0x31, 0xcc, 0xc3, 0x33, 0xd0,
+ 0x31, 0xd1, 0x35, 0x3f, 0x3e, 0x3c, 0xca, 0xc5, 0x34, 0xcc, 0xc2, 0xc3, 0xc3, 0xc5, 0x36, 0x40,
+ 0x3e, 0x41, 0x3e, 0x41, 0x3e, 0x3f, 0x41, 0x40, 0xce, 0xc5, 0x33, 0xcf, 0xc7, 0x36, 0xd2, 0x32,
+ 0xd1, 0xc5, 0xc6, 0x35, 0xd4, 0x32, 0xd1, 0xc6, 0x34, 0x41, 0xd2, 0x30, 0xd0, 0xc2, 0xc2, 0xc5,
+ 0x31, 0xd3, 0x31, 0xd1, 0xc7, 0x33, 0xd4, 0xc6, 0x34, 0x42, 0x40, 0x40, 0x40, 0x41, 0x41, 0xd2,
+ 0xc4, 0xc4, 0x39, 0x3e, 0xce, 0x35, 0x3c, 0xcd, 0x31, 0x3d, 0xc8, 0xc3, 0x32, 0x3d, 0xcc, 0x2f,
+ 0xce, 0x30, 0xd0, 0x2e, 0xcf, 0x30, 0x3d, 0x3c, 0x3c, 0x3a, 0xcb, 0xbf, 0xbf, 0xc1, 0x31, 0x3d,
+ 0x3d, 0x3c, 0x3c, 0x3c, 0x3d, 0x3b, 0xcf, 0x2e, 0xd2, 0x2e, 0xd0, 0x2c, 0x3b, 0xd1, 0x2a, 0xcf,
+ 0xbe, 0xc0, 0xc0, 0xbf, 0xc1, 0xc1, 0x2c, 0x3f, 0xd0, 0xc0, 0x2e, 0xd0, 0x31, 0xd2, 0xc2, 0x2f,
+ 0x3e, 0x3e, 0x3d, 0xcf, 0x31, 0xcb, 0xc3, 0x32, 0xd1, 0xc4, 0x37, 0x3f, 0xce, 0xc4, 0x35, 0xd0,
+ 0x33, 0x3f, 0xce, 0x31, 0x3c, 0x3b, 0xcc, 0x31, 0xcd, 0x2f, 0xd1, 0x32, 0x3a, 0x3b, 0xcb, 0xc1,
+ 0xc0, 0x32, 0x3e, 0x3e, 0x3c, 0x3d, 0x3d, 0xce, 0x2d, 0xcd, 0xc3, 0xc2, 0x30, 0x3d, 0xcf, 0xc1,
+ 0xc2, 0x30, 0xd0, 0xc4, 0x31, 0xd4, 0x30, 0x40, 0x3e, 0xd0, 0x2f, 0xd0, 0x2f, 0xd1, 0xc2, 0x2e,
+ 0xd4, 0x2e, 0x3f, 0xce, 0xc2, 0x34, 0x3e, 0x3f, 0xd0, 0x30, 0xcf, 0x31, 0x3d, 0x3d, 0xcc, 0x2d,
+ 0xcf, 0x2f, 0xcf, 0x2e, 0x3b, 0xcf, 0x2c, 0x3b, 0x3b, 0x3a, 0x3d, 0x38, 0xcc, 0x2d, 0x3b, 0xcc,
+ 0xbe, 0x2d, 0xd1, 0x2c, 0x3c, 0x3d, 0xce, 0xc0, 0x2d, 0xd1, 0x2f, 0x3f, 0x3f, 0x3c, 0x3f, 0x3e,
+ 0x3e, 0x3c, 0xd3, 0x2a, 0xd1, 0xc2, 0x2e, 0x3c, 0xd1, 0x2f, 0x3d, 0xd1, 0xbe, 0xc1, 0x2d, 0xd2,
+ 0x2d, 0x3d, 0x3d, 0x3b, 0xcd, 0x31, 0xcc, 0x31, 0xce, 0x2e, 0x3d, 0x3e, 0x3a, 0xcd, 0x2d, 0xcc,
+ 0xc1, 0xc1, 0xc3, 0x2e, 0x3f, 0x3f, 0x3c, 0xcf, 0xc0, 0x31, 0xd1, 0xc2, 0xc3, 0x33, 0xd2, 0xc7,
+ 0x32, 0x40, 0xd3, 0xc4, 0xc4, 0x33, 0x40, 0x40, 0xd2, 0x2f, 0xd0, 0x2f, 0x3c, 0xd1, 0x2c, 0x3a,
+ 0x3d, 0xd0, 0x2a, 0xd0, 0x28, 0xcf, 0xc3, 0x2c, 0xd2, 0x2d, 0xd3, 0xc3, 0xc3, 0x2e, 0x3e, 0x41,
+ 0xd2, 0xc3, 0xc2, 0xc2, 0xc2, 0xc2, 0xc4, 0x32, 0xd2, 0x34, 0x3e, 0x3e, 0x3c, 0xd1, 0x30, 0x3d,
+ 0x3c, 0xce, 0x2e, 0x3b, 0x38, 0xcb, 0xbe, 0xc1, 0x2e, 0x3e, 0x3c, 0x3d, 0xd1, 0x2c, 0x3b, 0x3b,
+ 0xcd, 0xbf, 0x2d, 0xd0, 0x2f, 0xd0, 0x2d, 0xd1, 0x2d, 0x3d, 0xd0, 0x2b, 0x3b, 0xcf, 0x2b, 0x3a,
+ 0xcc, 0xbc, 0xc1, 0x2a, 0x3c, 0xce, 0x28, 0xd1, 0x2a, 0x3c, 0x3a, 0xcf, 0xbf, 0x2b, 0x3e, 0x3c,
+ 0xd2, 0x2b, 0x3d, 0x3a, 0x3a, 0xcf, 0x2c, 0xcc, 0xbe, 0xc1, 0xc0, 0xbf, 0xc1, 0x31, 0x3c, 0xce,
+ 0xc0, 0xc1, 0xc0, 0xc1, 0x31, 0x3c, 0xd1, 0xc2, 0x2e, 0xd1, 0xc3, 0xc4, 0x30, 0x3f, 0xd3, 0x2c,
+ 0xd3, 0xc2, 0x30, 0xd5, 0xc3, 0xc5, 0x30, 0xd5, 0xc4, 0xc5, 0xc5, 0x31, 0x41, 0xd4, 0xc4, 0x31,
+ 0x40, 0xd4, 0x2d, 0xd5, 0xc0, 0xc3, 0x2c, 0x3f, 0x3e, 0x3f, 0x3f, 0x3f, 0xd6, 0x2c, 0x3e, 0xd2,
+ 0x27, 0x37, 0xde, 0xc9, 0xe9, 0x2e, 0xc7, 0x3c, 0xd9, 0x07, 0xf3, 0x28, 0x8d, 0xa5, 0xc9, 0xca,
+ 0xe7, 0xcb, 0xfc, 0xb3, 0x3c, 0xd4, 0xd3, 0x9a, 0xe7, 0x2c, 0xc8, 0xf8, 0x44, 0xb3, 0xb0, 0xfa,
+ 0x1c, 0xbf, 0xc9, 0xff, 0xbb, 0x1d, 0x02, 0xdb, 0x45, 0xc1, 0x40, 0x1c, 0xec, 0x48, 0xda, 0x21,
+ 0x4c, 0xe3, 0x38, 0xdf, 0x34, 0xd8, 0x35, 0xd8, 0x31, 0xd7, 0x30, 0xd4, 0x2f, 0xd6, 0x2d, 0xd5,
+ 0x2b, 0xd5, 0x33, 0xce, 0x33, 0xce, 0x33, 0xd0, 0x34, 0xcf, 0x31, 0xcf, 0x30, 0xce, 0x30, 0xcf,
+ 0x30, 0x3d, 0xce, 0x2f, 0xcf, 0xc2, 0x30, 0x3f, 0x3d, 0xcf, 0xc1, 0x31, 0xd0, 0xc5, 0xc4, 0x33,
+ 0x41, 0x3e, 0xd1, 0x30, 0x3c, 0x3d, 0xce, 0x2f, 0xce, 0xc1, 0xc3, 0x2e, 0xd3, 0x30, 0x3e, 0x3e,
+ 0x3c, 0x3f, 0x3c, 0xd1, 0xc0, 0xc0, 0xc0, 0xc1, 0xc2, 0xc0, 0xc1, 0xc3, 0x2c, 0x3f, 0xd2, 0xbe,
+ 0xc1, 0x2e, 0xcf, 0xc4, 0x33, 0xd3, 0x34, 0xd0, 0x33, 0x3d, 0xcf, 0xc3, 0x32, 0xce, 0x33, 0xd2,
+ 0x32, 0xce, 0xc5, 0x34, 0x40, 0xce, 0xc5, 0x32, 0x3e, 0xd0, 0x31, 0xd0, 0x2f, 0xd2, 0x30, 0xce,
+ 0xc2, 0x33, 0x40, 0x3e, 0xd0, 0xc3, 0xc2, 0x2e, 0xd3, 0x31, 0xd0, 0xc7, 0x32, 0x40, 0x3e, 0xd3,
+ 0x2f, 0xd3, 0x2e, 0xd0, 0x2d, 0xd3, 0x2d, 0xd3, 0x2f, 0x3c, 0x3d, 0xd1, 0x2a, 0x3b, 0xd1, 0x28,
+ 0x3b, 0x3b, 0xc8, 0x31, 0x39, 0x3b, 0x38, 0xc6, 0xbf, 0x31, 0x3d, 0x3a, 0xca, 0xc0, 0x33, 0x3c,
+ 0xca, 0xc0, 0xc1, 0xc1, 0xc2, 0x35, 0x3e, 0x3c, 0x3d, 0x3f, 0xcc, 0xc0, 0xc3, 0x31, 0xce, 0xc5,
+ 0x33, 0xd0, 0xc4, 0x35, 0xd3, 0x33, 0xd3, 0x32, 0xd1, 0xc4, 0xc3, 0x35, 0xd3, 0xc6, 0xc4, 0x35,
+ 0xd2, 0xc6, 0x35, 0x41, 0x41, 0xd4, 0x33, 0xd1, 0xc4, 0x30, 0x41, 0xd2, 0x30, 0x3e, 0xce, 0xc1,
+ 0xc3, 0xc0, 0x31, 0xce, 0xc5, 0x34, 0x40, 0x3d, 0xd1, 0xc4, 0x32, 0x3e, 0xcf, 0xc2, 0xc3, 0x30,
+ 0xd4, 0x32, 0x3e, 0x3f, 0x3e, 0x3f, 0x3e, 0xd0, 0xc2, 0x31, 0x3e, 0x3f, 0x3f, 0xd1, 0xc2, 0x2f,
+ 0xd5, 0x2e, 0xd3, 0xc3, 0x2f, 0xd7, 0x30, 0x3e, 0xd2, 0x2c, 0x3e, 0x3c, 0xd0, 0xc1, 0xc1, 0xc3,
+ 0xc0, 0xc3, 0x2c, 0xd4, 0xc2, 0x2e, 0x40, 0xd2, 0xc3, 0x2d, 0xd5, 0xc3, 0x2f, 0x42, 0x40, 0xd6,
+ 0x2d, 0xd4, 0xc2, 0xc2, 0xc2, 0x32, 0xd4, 0xc3, 0xc5, 0xc4, 0x32, 0x40, 0xd3, 0x30, 0xd0, 0xc3,
+ 0xc4, 0x30, 0xd3, 0xc5, 0xc5, 0xc4, 0xc4, 0x33, 0x40, 0x40, 0xd4, 0x2f, 0xd2, 0x2d, 0x3d, 0xd1,
+ 0xc1, 0xc2, 0x2c, 0xd4, 0x2e, 0xd4, 0x2d, 0x3d, 0xd3, 0xc1, 0xc1, 0xc1, 0x2d, 0xd5, 0xc2, 0xc2,
+ 0xc2, 0x2d, 0xd9, 0xc4, 0xc5, 0x2f, 0x43, 0x40, 0xd6, 0xd7, 0xd7, 0x2b, 0x3e, 0xd5, 0x29, 0x3d,
+ 0xd4, 0x24, 0x3b, 0x3a, 0x3b, 0xce, 0x2a, 0x3a, 0xcc, 0xbe, 0x2d, 0x3b, 0x3b, 0x3d, 0x3b, 0x3b,
+ 0xce, 0x2b, 0x3a, 0xcc, 0x2b, 0xd0, 0x2b, 0x3b, 0x3b, 0x39, 0xcf, 0xbf, 0x2a, 0xd1, 0xc0, 0x2f,
+ 0x3e, 0xd0, 0x2d, 0x3a, 0xd1, 0xbe, 0x2b, 0xd2, 0xc3, 0xc2, 0xc0, 0x2d, 0xd7, 0x2c, 0xd7, 0xc2,
+ 0xc3, 0x2f, 0x43, 0x41, 0x40, 0xd4, 0xc3, 0xc3, 0xc3, 0xc2, 0x2c, 0x40, 0xd7, 0x2a, 0x3d, 0xd3,
+ 0x26, 0xd5, 0x2f, 0x3a, 0x3c, 0xca, 0xc3, 0x2c, 0xd3, 0x2e, 0x3c, 0x3d, 0x3d, 0x3d, 0xd0, 0xc2,
+ 0x2e, 0xd3, 0x2e, 0xd1, 0xc5, 0x2e, 0x3f, 0xd3, 0x2e, 0x3c, 0xd1, 0xc0, 0xc2, 0x2a, 0xd2, 0xc2,
+ 0xc4, 0x2e, 0xd7, 0x2e, 0x3e, 0xd3, 0xc1, 0xc3, 0xc1, 0x2d, 0x3f, 0xd3, 0xc2, 0x2c, 0x3f, 0xd3,
+ 0x2b, 0x3b, 0xd1, 0xbf, 0xc1, 0xbe, 0x29, 0x3f, 0xd4, 0x29, 0xd5, 0xbf, 0x29, 0xd7, 0xc0, 0x2d,
+ 0xd8, 0xc2, 0x33, 0x41, 0xd3, 0x30, 0x3d, 0xd0, 0x2c, 0xcf, 0xc1, 0xc1, 0xc2, 0x2e, 0x3f, 0xd3,
+ 0x2b, 0xcf, 0xc3, 0x2f, 0x40, 0x3f, 0x3e, 0xd3, 0x2a, 0x3d, 0x3d, 0xce, 0xc1, 0x2b, 0x3d, 0xd0,
+ 0x2b, 0xd3, 0x2b, 0x3b, 0x3d, 0xce, 0x29, 0x3b, 0x3b, 0x3b, 0xd1, 0xbe, 0x2b, 0xd2, 0x29, 0x3d,
+ 0x3a, 0xd3, 0x29, 0x3a, 0x3b, 0x3b, 0xd2, 0x26, 0x3b, 0xd0, 0xbf, 0xbe, 0xbc, 0xbf, 0xbe, 0xbc,
+ 0x27, 0x3d, 0x3a, 0x3c, 0xce, 0xc1, 0x2c, 0xd2, 0xc2, 0xc2, 0x2f, 0x40, 0xd2, 0xc2, 0xc2, 0x2e,
+ 0x40, 0xd4, 0x2a, 0x3b, 0xcf, 0x2b, 0xd2, 0x2a, 0x3c, 0xd0, 0xc1, 0x2a, 0x3d, 0xd0, 0xc1, 0xc0,
+ 0xbe, 0x2b, 0x3f, 0x3e, 0xd2, 0xc1, 0xc0, 0xc1, 0xc0, 0xc2, 0x2a, 0xd6, 0xc2, 0xc3, 0xc3, 0xc3,
+ 0x2c, 0x3e, 0x41, 0xd6, 0xc0, 0xc3, 0xc2, 0xc2, 0x2a, 0xd9, 0x28, 0x3f, 0xd5, 0xc1, 0xc2, 0xc0,
+ 0xc3, 0x28, 0xd5, 0xc2, 0xc5, 0x30, 0xd6, 0xc4, 0xc5, 0xc5, 0x31, 0x43, 0xd4, 0xc3, 0xc5, 0xc2,
+ 0xc2, 0x2f, 0xd6, 0xc5, 0xc2, 0x2d, 0x41, 0x41, 0x43, 0x40, 0x41, 0xd8, 0x2a, 0x3f, 0x3f, 0x3e,
+ 0x2c, 0x0a, 0x0d, 0x2a, 0xbb, 0x91, 0x5e, 0x2a, 0xca, 0x23, 0xf0, 0x0f, 0xbe, 0xd6, 0xfb, 0xc0,
+ 0x2c, 0x34, 0x7f, 0xd1, 0xc9, 0xc1, 0x1c, 0x06, 0x97, 0x1f, 0x21, 0xa8, 0x04, 0x5d, 0x07, 0xb0,
+ 0x49, 0xaf, 0x10, 0x60, 0xd1, 0xf1, 0xf3, 0xcb, 0x72, 0x16, 0x24, 0xe9, 0xd4, 0x28, 0xb2, 0x8c,
+ 0xf3, 0x3b, 0xe8, 0x06, 0xeb, 0x09, 0xec, 0x0a, 0xec, 0x0b, 0xee, 0x0b, 0xee, 0x0b, 0xf0, 0x0b,
+ 0xf0, 0x0a, 0xf3, 0x0b, 0xf2, 0x0a, 0xf5, 0x08, 0xf5, 0x0a, 0xf4, 0x08, 0xf5, 0x08, 0xf5, 0x09,
+ 0xf4, 0x07, 0x3f, 0xf5, 0x05, 0xf6, 0xbf, 0x06, 0x3f, 0x3f, 0xf8, 0xbe, 0x07, 0xf8, 0xc3, 0xc3,
+ 0x06, 0x41, 0x40, 0xf0, 0x0f, 0x3c, 0x3d, 0xef, 0x0e, 0xee, 0xbe, 0xbf, 0x11, 0xf2, 0x0e, 0x3e,
+ 0x3c, 0x3f, 0x3e, 0x3e, 0xf0, 0xc1, 0xc1, 0xc1, 0xc1, 0xc3, 0xc0, 0xc1, 0xc1, 0x0b, 0x3f, 0xf5,
+ 0xc0, 0xc0, 0x08, 0xf7, 0xc2, 0x0c, 0xf6, 0x0d, 0xf9, 0x0a, 0x3f, 0xf9, 0xc0, 0x0b, 0xf6, 0x06,
+ 0xf8, 0x06, 0xf9, 0xc3, 0x08, 0x40, 0xfa, 0xc2, 0x09, 0x3e, 0xf7, 0x05, 0xf6, 0x04, 0xf7, 0x05,
+ 0xf8, 0xc1, 0xc3, 0xc1, 0x0a, 0x3e, 0x41, 0xf6, 0x07, 0xf7, 0x08, 0xf6, 0x07, 0x3e, 0x3c, 0x3f,
+ 0xf4, 0xbf, 0xbe, 0x06, 0xf8, 0x07, 0xf8, 0x05, 0xfb, 0xc0, 0xc1, 0x02, 0x40, 0x40, 0x3e, 0xfb,
+ 0x02, 0x3e, 0x3e, 0xf6, 0x01, 0xf9, 0x00, 0x3f, 0xf8, 0xbd, 0x02, 0xfc, 0xc1, 0xc0, 0x03, 0xfe,
+ 0xc5, 0xc4, 0xc2, 0xc5, 0xc2, 0x02, 0x41, 0x40, 0x40, 0x41, 0x40, 0xff, 0xff, 0x40, 0xfd, 0xfd,
+ 0xfc, 0xfd, 0x3e, 0xfc, 0xbe, 0xbf, 0xfe, 0xfc, 0xc1, 0xc0, 0xc1, 0xc1, 0x00, 0x01, 0x01, 0x02,
+ 0xc0, 0x00, 0x02, 0xc3, 0xc5, 0x02, 0x07, 0xc4, 0xc6, 0xc4, 0x02, 0x06, 0xc3, 0x01, 0x43, 0x43,
+ 0x42, 0x05, 0xfc, 0x04, 0xfd, 0x41, 0x3e, 0x05, 0xbf, 0xfb, 0x41, 0x3e, 0x3e, 0x3f, 0x3f, 0x40,
+ 0x02, 0xf9, 0x3e, 0x03, 0xbf, 0xbe, 0xf6, 0x3f, 0x05, 0xf6, 0x3c, 0x05, 0xbd, 0xbf, 0xbe, 0xf2,
+ 0x3f, 0x3c, 0x3d, 0x3e, 0x08, 0xee, 0x3d, 0x3b, 0x07, 0xbd, 0xf3, 0x0e, 0xc0, 0xc0, 0xf2, 0x0f,
+ 0xf2, 0x40, 0x0d, 0xef, 0x3f, 0x3e, 0x0a, 0xbf, 0xf0, 0x0e, 0xf1, 0x40, 0x0a, 0xef, 0x0e, 0xc1,
+ 0xc0, 0xc1, 0xc2, 0xc0, 0xee, 0x13, 0xc1, 0xee, 0x43, 0x10, 0xea, 0x15, 0xc0, 0xc0, 0xc0, 0xc3,
+ 0xc0, 0xec, 0x15, 0xc2, 0xf0, 0x16, 0xc2, 0xef, 0x1b, 0xc2, 0xf1, 0x44, 0x42, 0x19, 0xc2, 0xc3,
+ 0xed, 0x17, 0xe7, 0x21, 0xe4, 0x40, 0x3f, 0x20, 0xc0, 0xe2, 0x40, 0x3e, 0x1d, 0xc1, 0xc2, 0xc0,
+ 0xe2, 0x20, 0xe2, 0x3f, 0x3f, 0x3e, 0x1c, 0xdf, 0x3c, 0x3f, 0x1e, 0xbf, 0xc1, 0xbe, 0xdf, 0x3e,
+ 0x3d, 0x1f, 0xdc, 0x3c, 0x3b, 0x3d, 0x3a, 0x3d, 0x1f, 0xdb, 0x1e, 0xda, 0x20, 0xda, 0x21, 0xc1,
+ 0xc0, 0xc1, 0xdc, 0x3e, 0x23, 0xda, 0x3e, 0x20, 0xbf, 0xbd, 0xdb, 0x23, 0xbf, 0xdf, 0x26, 0xdc,
+ 0x26, 0xdc, 0x2e, 0xc2, 0xc3, 0xc3, 0xd4, 0x40, 0x2f, 0xc2, 0xd2, 0x3f, 0x3f, 0x3f, 0x2e, 0xd1,
+ 0x2d, 0xd3, 0x2c, 0xc3, 0xc3, 0xc3, 0xc2, 0xc3, 0xc2, 0xd3, 0x3e, 0x31, 0xd0, 0x2d, 0xc3, 0xc0,
+ 0xc1, 0xd1, 0x2f, 0xd3, 0x3f, 0x3f, 0x31, 0xc1, 0xcf, 0x31, 0xd2, 0x3e, 0x3f, 0x3c, 0x41, 0x3e,
+ 0x3e, 0x3f, 0x31, 0xd1, 0x30, 0xc0, 0xcf, 0x33, 0xd1, 0x3d, 0x41, 0x32, 0xc0, 0xc3, 0xce, 0x3e,
+ 0x32, 0xc3, 0xc3, 0xc2, 0xc0, 0xc3, 0xca, 0x3c, 0x37, 0xc5, 0xc3, 0xca, 0x34, 0xcf, 0x35, 0xc6,
+ 0xca, 0x3c, 0x39, 0xce, 0x3c, 0x37, 0xc2, 0xc8, 0x3c, 0x36, 0xcc, 0x30, 0xcb, 0x33, 0xc6, 0xc3,
+ 0xc8, 0x34, 0xcc, 0x3d, 0x37, 0xc5, 0xc9, 0x38, 0xc6, 0xca, 0x3b, 0x40, 0x40, 0x40, 0x3a, 0xc5,
+ 0xc8, 0x3f, 0x3e, 0x3b, 0xce, 0x3a, 0x3e, 0x38, 0xca, 0x39, 0x3c, 0x3c, 0x36, 0xcb, 0x36, 0x3b,
+ 0x37, 0xc8, 0x35, 0x3a, 0x36, 0xc8, 0x2f, 0xc4, 0xc5, 0x36, 0x38, 0xc7, 0xc0, 0xc7, 0x33, 0xc8,
+ 0xc3, 0xc5, 0x39, 0x3b, 0xc9, 0xc7, 0x34, 0xd1, 0x34, 0xcf, 0x35, 0xca, 0xc9, 0x36, 0xd0, 0x36,
+ 0xcc, 0xc7, 0x39, 0x41, 0x42, 0x42, 0x3e, 0xca, 0xc1, 0xc3, 0xc3, 0xc2, 0xc3, 0xc2, 0xc4, 0xc6,
+ 0x34, 0xd1, 0x35, 0xcf, 0x37, 0x3c, 0xce, 0x35, 0x3b, 0xcc, 0x30, 0xca, 0x33, 0x39, 0xc9, 0xbf,
+ 0xbf, 0xbf, 0xc3, 0x34, 0x3c, 0x3f, 0x3a, 0xcc, 0x2f, 0xcd, 0x32, 0x3c, 0x3a, 0xc8, 0xc2, 0x34,
+ 0x3a, 0xcb, 0xc0, 0xc0, 0x35, 0x3c, 0xce, 0x32, 0x3c, 0x3c, 0x3d, 0x3a, 0xcd, 0x2e, 0x3b, 0x39,
+ 0xc9, 0xbc, 0xbf, 0x30, 0xcc, 0xc0, 0xc3, 0x33, 0xce, 0xc5, 0xc2, 0xc4, 0x36, 0x3e, 0xd1, 0xc3,
+ 0xc2, 0xc3, 0xc5, 0x33, 0xd0, 0xc5, 0xc4, 0x35, 0x40, 0x40, 0x3e, 0x41, 0x3e, 0xd2, 0x30, 0x3f,
+ 0x3e, 0x3d, 0x21, 0xc8, 0x0d, 0x23, 0xec, 0xb1, 0x1a, 0xf0, 0xf3, 0x10, 0xc6, 0xbd, 0x5b, 0x0d,
+ 0xff, 0xe2, 0xe6, 0xd4, 0x72, 0xe2, 0xda, 0x0c, 0xf8, 0x1b, 0x04, 0x0b, 0xf7, 0xb4, 0xf0, 0x44,
+ 0xcd, 0xaf, 0x12, 0x1f, 0x11, 0xa1, 0x29, 0xb8, 0x1a, 0xdb, 0x09, 0x69, 0xf7, 0x20, 0xc4, 0x1c,
+ 0xc0, 0xc8, 0x1d, 0x45, 0xd9, 0x30, 0xd8, 0x2e, 0xd8, 0x2e, 0xd6, 0x2c, 0xd5, 0x2d, 0xd4, 0x2b,
+ 0xd5, 0x2b, 0xd1, 0x31, 0xd0, 0x32, 0xd2, 0x30, 0xd0, 0x31, 0xd0, 0x31, 0xce, 0x2f, 0xd3, 0x2e,
+ 0xce, 0x2f, 0xd1, 0x31, 0x3c, 0xd1, 0x2d, 0xd0, 0xc0, 0x2e, 0x3c, 0x3d, 0xd1, 0xc3, 0x2c, 0xd2,
+ 0xc3, 0xc5, 0x31, 0x40, 0x40, 0xd5, 0x2c, 0x3a, 0x3d, 0xd0, 0x2b, 0xd3, 0xc0, 0xc0, 0x2d, 0xd4,
+ 0x2c, 0x3f, 0x3e, 0x3c, 0x3f, 0x3c, 0xd2, 0xc1, 0xc2, 0xc0, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0x2a,
+};
+
+
+int
+ao_real_packet(void)
+{
+ uint8_t decode[64];
+ int ok;
+
+ ok = ao_fec_decode(real_packet, 576, decode, 34, NULL);
+
+ if (ok && decode[33] == AO_FEC_DECODE_CRC_OK) {
+ printf ("match\n");
+
+ ao_fec_dump_bytes(decode, 34, "Decode");
+ } else {
+ printf ("actual packet crc error\n");
+ ok = 0;
+ }
+ return ok;
+}
+
+#define EXPECT_DECODE_FAIL 0
+#define EXPECT_CRC_MISMATCH 6386
+#define EXPECT_DATA_MISMATCH 0
+#define NOISE_AMOUNT 0x50
+
+int
+main(int argc, char **argv)
+{
+ int trial;
+
+ uint8_t original[120];
+ uint8_t original_len;
+
+ uint8_t encode[ENCODE_LEN(sizeof(original))];
+ int encode_len;
+
+ uint8_t transmit[EXPAND_LEN(sizeof(original))];
+ int transmit_len;
+
+ uint8_t receive[EXPAND_LEN(sizeof(original))];
+ int receive_len;
+
+ uint8_t decode[DECODE_LEN(sizeof(original))];
+ int decode_ok;
+
+ int errors = 0;
+ int decode_fail = 0;
+ int crc_mismatch = 0;
+ int data_mismatch = 0;
+
+ if (!ao_real_packet())
+ errors++;
+
+ srandom(0);
+ for (trial = 0; trial < 100000; trial++) {
+
+ /* Compute some random data */
+ original_len = ao_random_data(original, sizeof(original));
+
+ /* Encode it */
+ encode_len = ao_fec_encode(original, original_len, encode);
+
+ /* Expand from 1-bit-per-symbol to 1-byte-per-symbol */
+ transmit_len = ao_expand(encode, encode_len, transmit);
+
+ /* Add gaussian noise to the signal */
+ (void) ao_fuzz(transmit, transmit_len, receive, NOISE_AMOUNT);
+ receive_len = transmit_len;
+
+ /* Decode it */
+ decode_ok = ao_fec_decode(receive, receive_len, decode, original_len + 2, NULL);
+
+ /* Check to see if we received the right data */
+
+ if (!decode_ok)
+ decode_fail++;
+ else if (decode[original_len +1] != AO_FEC_DECODE_CRC_OK)
+ crc_mismatch++;
+ else if (memcmp(original, decode, original_len) != 0)
+ data_mismatch++;
+ }
+
+
+ printf ("%d packets coded\n", trial);
+ printf ("decode_fail %d crc_mismatch %d data_mismatch %d\n",
+ decode_fail, crc_mismatch, data_mismatch);
+ if (decode_fail != EXPECT_DECODE_FAIL) {
+ printf ("expected %d decode failures\n", EXPECT_DECODE_FAIL);
+ errors++;
+ }
+ if (crc_mismatch != EXPECT_CRC_MISMATCH) {
+ printf ("expected %d crc mismatch\n", EXPECT_CRC_MISMATCH);
+ errors++;
+ }
+ if (data_mismatch != EXPECT_DATA_MISMATCH) {
+ printf ("expected %d data mismatch\n", EXPECT_DATA_MISMATCH);
+ errors++;
+ }
+ return errors;
+}
+
+
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-21 06:54:08 +0000