Add current version of libSRTP from CVS.

libsrtp/test/roc_driver.c

+/*
+ * roc_driver.c
+ *
+ * test driver for rollover counter replay implementation
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ */
+
+/*
+ *      
+ * Copyright (c) 2001-2006, Cisco Systems, Inc.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ *   Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials provided
+ *   with the distribution.
+ * 
+ *   Neither the name of the Cisco Systems, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+#include <stdio.h>
+
+/*
+ * defining ROC_TEST causes small datatypes to be used in
+ * xtd_seq_num_t - this allows the functions to be exhaustively tested.
+ */
+#if ROC_NEEDS_TO_BE_TESTED
+#define ROC_TEST     
+#endif
+
+#include "rdbx.h"
+#include "ut_sim.h"
+
+err_status_t
+roc_test(int num_trials);
+
+int
+main (void) {
+  err_status_t status;
+
+  printf("rollover counter test driver\n"
+         "David A. McGrew\n"
+         "Cisco Systems, Inc.\n");
+  
+  printf("testing index functions...");
+  status = roc_test(1 << 18);
+  if (status) {
+    printf("failed\n");
+    exit(status);
+  }
+  printf("passed\n");
+  return 0;
+}
+
+
+#define ROC_VERBOSE 0
+
+err_status_t
+roc_test(int num_trials) {
+  xtd_seq_num_t local, est, ref;
+  ut_connection utc;
+  int i, num_bad_est = 0;
+  int delta;
+  uint32_t ircvd;
+  double failure_rate;
+
+  index_init(&local);
+  index_init(&ref);
+  index_init(&est);
+
+  printf("\n\ttesting sequential insertion...");
+  for (i=0; i < 2048; i++) {
+    delta = index_guess(&local, &est, (uint16_t) ref);
+#if ROC_VERBOSE
+    printf("%lld, %lld, %d\n", ref, est,  i);
+#endif
+    if (ref != est) {
+#if ROC_VERBOSE
+      printf(" *bad estimate*\n");
+#endif
+      ++num_bad_est;
+    }
+    index_advance(&ref, 1);
+  }
+  failure_rate = (double) num_bad_est / num_trials;
+  if (failure_rate > 0.01) {
+    printf("error: failure rate too high (%d bad estimates in %d trials)\n", 
+           num_bad_est, num_trials);
+    return err_status_algo_fail;
+  }
+  printf("done\n");
+
+
+  printf("\ttesting non-sequential insertion...");
+  index_init(&local);
+  index_init(&ref);
+  index_init(&est);
+  ut_init(&utc);
+  
+  for (i=0; i < num_trials; i++) {
+    
+    /* get next seq num from unreliable transport simulator */
+    ircvd = ut_next_index(&utc);
+    
+    /* set ref to value of ircvd */
+    ref = ircvd; 
+
+    /* estimate index based on low bits of ircvd */
+    delta = index_guess(&local, &est, (uint16_t) ref);
+#if ROC_VERBOSE
+    printf("ref: %lld, local: %lld, est: %lld, ircvd: %d, delta: %d\n", 
+           ref, local, est, ircvd, delta);
+#endif
+    
+    /* now update local xtd_seq_num_t as necessary */
+    if (delta > 0) 
+      index_advance(&local, delta);
+
+    if (ref != est) {
+#if ROC_VERBOSE
+      printf(" *bad estimate*\n");
+#endif
+      /* record failure event */
+      ++num_bad_est;
+      
+      /* reset local value to correct value */
+      local = ref;
+    }
+  }
+  failure_rate = (double) num_bad_est / num_trials;
+  if (failure_rate > 0.01) {
+    printf("error: failure rate too high (%d bad estimates in %d trials)\n", 
+           num_bad_est, num_trials);
+    return err_status_algo_fail;
+  }
+  printf("done\n");
+
+  return err_status_ok;
+}