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RIOT/tests/unittests/tests-rpl_srh/tests-rpl_srh.c 3.85 KB
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  /*
   * Copyright (C) 2016 Cenk Gündoğan <mail@cgundogan.de>
   *
   * This file is subject to the terms and conditions of the GNU Lesser
   * General Public License v2.1. See the file LICENSE in the top level
   * directory for more details.
   */
  
  /**
   * @{
   *
   * @file
   */
  #include <stdlib.h>
  #include <string.h>
  #include "embUnit.h"
  
  #include "net/ipv6/addr.h"
  #include "net/ipv6/ext.h"
  #include "net/ipv6/hdr.h"
  #include "net/gnrc/rpl/srh.h"
  
  #include "unittests-constants.h"
  #include "tests-rpl_srh.h"
  
  #define IPV6_DST            {{ 0x20, 0x01, 0xab, 0xcd, \
                                 0x00, 0x00, 0x00, 0x00, \
                                 0x00, 0x00, 0x00, 0x00, \
                                 0x00, 0x00, 0x00, 0x01 }}
  #define IPV6_ADDR1          {{ 0x20, 0x01, 0xab, 0xcd, \
                                 0x00, 0x00, 0x00, 0x00, \
                                 0x00, 0x00, 0x00, 0x00, \
                                 0x00, 0x00, 0x00, 0x02 }}
  #define IPV6_ADDR2          {{ 0x20, 0x01, 0xab, 0xcd, \
                                 0x00, 0x00, 0x00, 0x00, \
                                 0x00, 0x00, 0x00, 0x00, \
                                 0x00, 0x00, 0x00, 0x03 }}
  
  #define IPV6_ADDR1_ELIDED   { 0x00, 0x00, 0x02 }
  #define IPV6_ADDR2_ELIDED   { 0x00, 0x00, 0x03 }
  #define IPV6_ELIDED_PREFIX  (13)
  
  #define SRH_SEG_LEFT        (2)
  
  static void test_rpl_srh_nexthop_no_prefix_elided(void)
  {
      ipv6_hdr_t hdr;
      uint8_t buf[sizeof(gnrc_rpl_srh_t) + 2 * sizeof(ipv6_addr_t)] = { 0 };
      int res;
      gnrc_rpl_srh_t *srh = (gnrc_rpl_srh_t *) buf;
      uint8_t *vec = (uint8_t *) (srh + 1);
      ipv6_addr_t a1 = IPV6_ADDR1, a2 = IPV6_ADDR2, dst = IPV6_DST,
                       expected1 = IPV6_ADDR1, expected2 = IPV6_ADDR2;
  
      hdr.dst = dst;
  
      srh->len = (2 * sizeof(ipv6_addr_t)) / 8;
      srh->seg_left = SRH_SEG_LEFT;
      memcpy(vec, &a1, sizeof(a1));
      memcpy(vec + sizeof(a1), &a2, sizeof(a2));
  
      /* first hop */
      res = gnrc_rpl_srh_process(&hdr, srh);
      TEST_ASSERT_EQUAL_INT(res, EXT_RH_CODE_FORWARD);
      TEST_ASSERT_EQUAL_INT(SRH_SEG_LEFT - 1, srh->seg_left);
      TEST_ASSERT(ipv6_addr_equal(&hdr.dst, &expected1));
  
      /* second hop */
      res = gnrc_rpl_srh_process(&hdr, srh);
      TEST_ASSERT_EQUAL_INT(res, EXT_RH_CODE_FORWARD);
      TEST_ASSERT_EQUAL_INT(SRH_SEG_LEFT - 2, srh->seg_left);
      TEST_ASSERT(ipv6_addr_equal(&hdr.dst, &expected2));
  }
  
  static void test_rpl_srh_nexthop_prefix_elided(void)
  {
      ipv6_hdr_t hdr;
      uint8_t a1[3] = IPV6_ADDR1_ELIDED;
      uint8_t a2[3] = IPV6_ADDR2_ELIDED;
      uint8_t buf[sizeof(gnrc_rpl_srh_t) + sizeof(a1) + sizeof(a2)] = { 0 };
      int res;
      gnrc_rpl_srh_t *srh = (gnrc_rpl_srh_t *) buf;
      uint8_t *vec = (uint8_t *) (srh + 1);
      ipv6_addr_t dst = IPV6_DST, expected1 = IPV6_ADDR1, expected2 = IPV6_ADDR2;
  
      hdr.dst = dst;
  
      srh->len = (sizeof(a1) + sizeof(a2) + 2) / 8;
      srh->seg_left = SRH_SEG_LEFT;
      srh->compr = (IPV6_ELIDED_PREFIX << 4) | IPV6_ELIDED_PREFIX;
      srh->pad_resv = 2 << 4;
      memcpy(vec, &a1, sizeof(a1));
      memcpy(vec + sizeof(a1), &a2, sizeof(a2));
  
      /* first hop */
      res = gnrc_rpl_srh_process(&hdr, srh);
      TEST_ASSERT_EQUAL_INT(res, EXT_RH_CODE_FORWARD);
      TEST_ASSERT_EQUAL_INT(SRH_SEG_LEFT - 1, srh->seg_left);
      TEST_ASSERT(ipv6_addr_equal(&hdr.dst, &expected1));
  
      /* second hop */
      res = gnrc_rpl_srh_process(&hdr, srh);
      TEST_ASSERT_EQUAL_INT(res, EXT_RH_CODE_FORWARD);
      TEST_ASSERT_EQUAL_INT(SRH_SEG_LEFT - 2, srh->seg_left);
      TEST_ASSERT(ipv6_addr_equal(&hdr.dst, &expected2));
  }
  
  Test *tests_rpl_srh_tests(void)
  {
      EMB_UNIT_TESTFIXTURES(fixtures) {
          new_TestFixture(test_rpl_srh_nexthop_no_prefix_elided),
          new_TestFixture(test_rpl_srh_nexthop_prefix_elided),
      };
  
      EMB_UNIT_TESTCALLER(rpl_srh_tests, NULL, NULL, fixtures);
  
      return (Test *)&rpl_srh_tests;
  }
  
  void tests_rpl_srh(void)
  {
      TESTS_RUN(tests_rpl_srh_tests());
  }
  /** @} */