test/core/iomgr/sockaddr_utils_test.c

/*
 *
 * Copyright 2015, Google 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.
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 * 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
 * OWNER 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include "src/core/iomgr/sockaddr_utils.h"

#include <errno.h>
#include <string.h>

#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/port_platform.h>
#include "test/core/util/test_config.h"

static struct sockaddr_in
make_addr4 (const gpr_uint8 * data, size_t data_len)
{
  struct sockaddr_in addr4;
  memset (&addr4, 0, sizeof (addr4));
  addr4.sin_family = AF_INET;
  GPR_ASSERT (data_len == sizeof (addr4.sin_addr.s_addr));
  memcpy (&addr4.sin_addr.s_addr, data, data_len);
  addr4.sin_port = htons (12345);
  return addr4;
}

static struct sockaddr_in6
make_addr6 (const gpr_uint8 * data, size_t data_len)
{
  struct sockaddr_in6 addr6;
  memset (&addr6, 0, sizeof (addr6));
  addr6.sin6_family = AF_INET6;
  GPR_ASSERT (data_len == sizeof (addr6.sin6_addr.s6_addr));
  memcpy (&addr6.sin6_addr.s6_addr, data, data_len);
  addr6.sin6_port = htons (12345);
  return addr6;
}

static const gpr_uint8 kMapped[] = { 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0xff, 0xff, 192, 0, 2, 1
};

static const gpr_uint8 kNotQuiteMapped[] = { 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0xff, 0xfe, 192, 0, 2, 99
};
static const gpr_uint8 kIPv4[] = { 192, 0, 2, 1 };

static const gpr_uint8 kIPv6[] = { 0x20, 0x01, 0x0d, 0xb8, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 1
};

static void
test_sockaddr_is_v4mapped (void)
{
  struct sockaddr_in input4;
  struct sockaddr_in6 input6;
  struct sockaddr_in output4;
  struct sockaddr_in expect4;

  gpr_log (GPR_INFO, "%s", "test_sockaddr_is_v4mapped");

  /* v4mapped input should succeed. */
  input6 = make_addr6 (kMapped, sizeof (kMapped));
  GPR_ASSERT (grpc_sockaddr_is_v4mapped ((const struct sockaddr *) &input6, NULL));
  GPR_ASSERT (grpc_sockaddr_is_v4mapped ((const struct sockaddr *) &input6, &output4));
  expect4 = make_addr4 (kIPv4, sizeof (kIPv4));
  GPR_ASSERT (memcmp (&expect4, &output4, sizeof (expect4)) == 0);

  /* Non-v4mapped input should fail. */
  input6 = make_addr6 (kNotQuiteMapped, sizeof (kNotQuiteMapped));
  GPR_ASSERT (!grpc_sockaddr_is_v4mapped ((const struct sockaddr *) &input6, NULL));
  GPR_ASSERT (!grpc_sockaddr_is_v4mapped ((const struct sockaddr *) &input6, &output4));
  /* Output is unchanged. */
  GPR_ASSERT (memcmp (&expect4, &output4, sizeof (expect4)) == 0);

  /* Plain IPv4 input should also fail. */
  input4 = make_addr4 (kIPv4, sizeof (kIPv4));
  GPR_ASSERT (!grpc_sockaddr_is_v4mapped ((const struct sockaddr *) &input4, NULL));
}

static void
test_sockaddr_to_v4mapped (void)
{
  struct sockaddr_in input4;
  struct sockaddr_in6 input6;
  struct sockaddr_in6 output6;
  struct sockaddr_in6 expect6;

  gpr_log (GPR_INFO, "%s", "test_sockaddr_to_v4mapped");

  /* IPv4 input should succeed. */
  input4 = make_addr4 (kIPv4, sizeof (kIPv4));
  GPR_ASSERT (grpc_sockaddr_to_v4mapped ((const struct sockaddr *) &input4, &output6));
  expect6 = make_addr6 (kMapped, sizeof (kMapped));
  GPR_ASSERT (memcmp (&expect6, &output6, sizeof (output6)) == 0);

  /* IPv6 input should fail. */
  input6 = make_addr6 (kIPv6, sizeof (kIPv6));
  GPR_ASSERT (!grpc_sockaddr_to_v4mapped ((const struct sockaddr *) &input6, &output6));
  /* Output is unchanged. */
  GPR_ASSERT (memcmp (&expect6, &output6, sizeof (output6)) == 0);

  /* Already-v4mapped input should also fail. */
  input6 = make_addr6 (kMapped, sizeof (kMapped));
  GPR_ASSERT (!grpc_sockaddr_to_v4mapped ((const struct sockaddr *) &input6, &output6));
}

static void
test_sockaddr_is_wildcard (void)
{
  struct sockaddr_in wild4;
  struct sockaddr_in6 wild6;
  struct sockaddr_in6 wild_mapped;
  struct sockaddr dummy;
  int port;

  gpr_log (GPR_INFO, "%s", "test_sockaddr_is_wildcard");

  /* Generate wildcards. */
  grpc_sockaddr_make_wildcards (555, &wild4, &wild6);
  GPR_ASSERT (grpc_sockaddr_to_v4mapped ((const struct sockaddr *) &wild4, &wild_mapped));

  /* Test 0.0.0.0:555 */
  port = -1;
  GPR_ASSERT (grpc_sockaddr_is_wildcard ((const struct sockaddr *) &wild4, &port));
  GPR_ASSERT (port == 555);
  memset (&wild4.sin_addr.s_addr, 0xbd, 1);
  GPR_ASSERT (!grpc_sockaddr_is_wildcard ((const struct sockaddr *) &wild4, &port));

  /* Test [::]:555 */
  port = -1;
  GPR_ASSERT (grpc_sockaddr_is_wildcard ((const struct sockaddr *) &wild6, &port));
  GPR_ASSERT (port == 555);
  memset (&wild6.sin6_addr.s6_addr, 0xbd, 1);
  GPR_ASSERT (!grpc_sockaddr_is_wildcard ((const struct sockaddr *) &wild6, &port));

  /* Test [::ffff:0.0.0.0]:555 */
  port = -1;
  GPR_ASSERT (grpc_sockaddr_is_wildcard ((const struct sockaddr *) &wild_mapped, &port));
  GPR_ASSERT (port == 555);
  memset (&wild_mapped.sin6_addr.s6_addr, 0xbd, 1);
  GPR_ASSERT (!grpc_sockaddr_is_wildcard ((const struct sockaddr *) &wild_mapped, &port));

  /* Test AF_UNSPEC. */
  port = -1;
  memset (&dummy, 0, sizeof (dummy));
  GPR_ASSERT (!grpc_sockaddr_is_wildcard (&dummy, &port));
  GPR_ASSERT (port == -1);
}

static void
expect_sockaddr_str (const char *expected, void *addr, int normalize)
{
  int result;
  char *str;
  gpr_log (GPR_INFO, "  expect_sockaddr_str(%s)", expected);
  result = grpc_sockaddr_to_string (&str, (struct sockaddr *) addr, normalize);
  GPR_ASSERT (str != NULL);
  GPR_ASSERT (result >= 0);
  GPR_ASSERT ((size_t) result == strlen (str));
  GPR_ASSERT (strcmp (expected, str) == 0);
  gpr_free (str);
}

static void
expect_sockaddr_uri (const char *expected, void *addr)
{
  char *str;
  gpr_log (GPR_INFO, "  expect_sockaddr_uri(%s)", expected);
  str = grpc_sockaddr_to_uri ((struct sockaddr *) addr);
  GPR_ASSERT (str != NULL);
  GPR_ASSERT (strcmp (expected, str) == 0);
  gpr_free (str);
}

static void
test_sockaddr_to_string (void)
{
  struct sockaddr_in input4;
  struct sockaddr_in6 input6;
  struct sockaddr dummy;

  gpr_log (GPR_INFO, "%s", "test_sockaddr_to_string");

  errno = 0x7EADBEEF;

  input4 = make_addr4 (kIPv4, sizeof (kIPv4));
  expect_sockaddr_str ("192.0.2.1:12345", &input4, 0);
  expect_sockaddr_str ("192.0.2.1:12345", &input4, 1);
  expect_sockaddr_uri ("ipv4:192.0.2.1:12345", &input4);

  input6 = make_addr6 (kIPv6, sizeof (kIPv6));
  expect_sockaddr_str ("[2001:db8::1]:12345", &input6, 0);
  expect_sockaddr_str ("[2001:db8::1]:12345", &input6, 1);
  expect_sockaddr_uri ("ipv6:[2001:db8::1]:12345", &input6);

  input6 = make_addr6 (kMapped, sizeof (kMapped));
  expect_sockaddr_str ("[::ffff:192.0.2.1]:12345", &input6, 0);
  expect_sockaddr_str ("192.0.2.1:12345", &input6, 1);
  expect_sockaddr_uri ("ipv4:192.0.2.1:12345", &input6);

  input6 = make_addr6 (kNotQuiteMapped, sizeof (kNotQuiteMapped));
  expect_sockaddr_str ("[::fffe:c000:263]:12345", &input6, 0);
  expect_sockaddr_str ("[::fffe:c000:263]:12345", &input6, 1);
  expect_sockaddr_uri ("ipv6:[::fffe:c000:263]:12345", &input6);

  memset (&dummy, 0, sizeof (dummy));
  dummy.sa_family = 123;
  expect_sockaddr_str ("(sockaddr family=123)", &dummy, 0);
  expect_sockaddr_str ("(sockaddr family=123)", &dummy, 1);
  GPR_ASSERT (grpc_sockaddr_to_uri (&dummy) == NULL);

  GPR_ASSERT (errno == 0x7EADBEEF);
}

int
main (int argc, char **argv)
{
  grpc_test_init (argc, argv);

  test_sockaddr_is_v4mapped ();
  test_sockaddr_to_v4mapped ();
  test_sockaddr_is_wildcard ();
  test_sockaddr_to_string ();

  return 0;
}