Merge branch 'ticket14710_squashed'

1 files changed, 173 insertions, 2 deletions

diff --git a/src/test/test_address.c b/src/test/test_address.c
index 424a6352b0..317b370912 100644
--- a/src/test/test_address.c
+++ b/src/test/test_address.c
@@ -130,8 +130,8 @@ test_address_ifaddrs_to_smartlist(void *arg)
    ipv6_sockaddr = tor_malloc(sizeof(struct sockaddr_in6));
    ipv6_sockaddr->sin6_family = AF_INET6;
    ipv6_sockaddr->sin6_port = 0;
-   inet_pton(AF_INET6, "2001:db8:8714:3a90::12",
-             &(ipv6_sockaddr->sin6_addr));
+   tor_inet_pton(AF_INET6, "2001:db8:8714:3a90::12",
+                 &(ipv6_sockaddr->sin6_addr));
 
    ifa = tor_malloc(sizeof(struct ifaddrs));
    ifa_ipv4 = tor_malloc(sizeof(struct ifaddrs));
@@ -452,10 +452,181 @@ test_address_get_if_addrs_ioctl(void *arg)
 
 #endif
 
+#define FAKE_SOCKET_FD (42)
+
+tor_socket_t
+fake_open_socket(int domain, int type, int protocol)
+{
+  (void)domain;
+  (void)type;
+  (void)protocol;
+
+  return FAKE_SOCKET_FD;
+}
+
+static int last_connected_socket_fd = 0;
+
+static int connect_retval = 0;
+
+tor_socket_t
+pretend_to_connect(tor_socket_t socket, const struct sockaddr *address,
+                   socklen_t address_len)
+{
+  (void)address;
+  (void)address_len;
+
+  last_connected_socket_fd = socket;
+
+  return connect_retval;
+}
+
+static struct sockaddr *mock_addr = NULL;
+
+int
+fake_getsockname(tor_socket_t socket, struct sockaddr *address,
+                 socklen_t *address_len)
+{
+  socklen_t bytes_to_copy = 0;
+
+  if (!mock_addr)
+    return -1;
+
+  if (mock_addr->sa_family == AF_INET) {
+    bytes_to_copy = sizeof(struct sockaddr_in);
+  } else if (mock_addr->sa_family == AF_INET6) {
+    bytes_to_copy = sizeof(struct sockaddr_in6);
+  } else {
+    return -1;
+  }
+
+  if (*address_len < bytes_to_copy) {
+    return -1;
+  }
+
+  memcpy(address,mock_addr,bytes_to_copy);
+  *address_len = bytes_to_copy;
+
+  return 0;
+}
+
+static void
+test_address_udp_socket_trick_whitebox(void *arg)
+{
+  int hack_retval;
+  tor_addr_t *addr_from_hack = tor_malloc_zero(sizeof(tor_addr_t));
+  struct sockaddr_in6 *mock_addr6;
+  struct sockaddr_in6 *ipv6_to_check =
+  tor_malloc_zero(sizeof(struct sockaddr_in6));
+
+  (void)arg;
+
+  MOCK(tor_open_socket,fake_open_socket);
+  MOCK(tor_connect_socket,pretend_to_connect);
+  MOCK(tor_getsockname,fake_getsockname);
+
+  mock_addr = tor_malloc_zero(sizeof(struct sockaddr_storage));
+  sockaddr_in_from_string("23.32.246.118",(struct sockaddr_in *)mock_addr);
+
+  hack_retval =
+  get_interface_address6_via_udp_socket_hack(LOG_DEBUG,
+                                             AF_INET, addr_from_hack);
+
+  tt_int_op(hack_retval,==,0);
+  tt_assert(tor_addr_eq_ipv4h(addr_from_hack, 0x1720f676));
+
+  /* Now, lets do an IPv6 case. */
+  memset(mock_addr,0,sizeof(struct sockaddr_storage));
+
+  mock_addr6 = (struct sockaddr_in6 *)mock_addr;
+  mock_addr6->sin6_family = AF_INET6;
+  mock_addr6->sin6_port = 0;
+  tor_inet_pton(AF_INET6,"2001:cdba::3257:9652",&(mock_addr6->sin6_addr));
+
+  hack_retval =
+  get_interface_address6_via_udp_socket_hack(LOG_DEBUG,
+                                             AF_INET6, addr_from_hack);
+
+  tt_int_op(hack_retval,==,0);
+
+  tor_addr_to_sockaddr(addr_from_hack,0,(struct sockaddr *)ipv6_to_check,
+                       sizeof(struct sockaddr_in6));
+
+  tt_assert(sockaddr_in6_are_equal(mock_addr6,ipv6_to_check));
+
+  UNMOCK(tor_open_socket);
+  UNMOCK(tor_connect_socket);
+  UNMOCK(tor_getsockname);
+
+  done:
+  tor_free(ipv6_to_check);
+  tor_free(mock_addr);
+  tor_free(addr_from_hack);
+  return;
+}
+
+static void
+test_address_udp_socket_trick_blackbox(void *arg)
+{
+  /* We want get_interface_address6_via_udp_socket_hack() to yield
+   * the same valid address that get_interface_address6() returns.
+   * If the latter is unable to find a valid address, we want
+   * _hack() to fail and return-1.
+   *
+   * Furthermore, we want _hack() never to crash, even if
+   * get_interface_addresses_raw() is returning NULL.
+   */
+
+  tor_addr_t addr4;
+  tor_addr_t addr4_to_check;
+  tor_addr_t addr6;
+  tor_addr_t addr6_to_check;
+  int retval, retval_reference;
+
+  (void)arg;
+
+  retval_reference = get_interface_address6(LOG_DEBUG,AF_INET,&addr4);
+  retval = get_interface_address6_via_udp_socket_hack(LOG_DEBUG,
+                                                      AF_INET,
+                                                      &addr4_to_check);
+
+  tt_int_op(retval,==,retval_reference);
+  tt_assert( (retval == -1 && retval_reference == -1) ||
+             (tor_addr_compare(&addr4,&addr4_to_check,CMP_EXACT) == 0) );
+
+  //[XXX: Skipping the AF_INET6 case because bug #12377 makes it fail.]
+  (void)addr6_to_check;
+  (void)addr6;
+#if 0
+  retval_reference = get_interface_address6(LOG_DEBUG,AF_INET6,&addr6);
+  retval = get_interface_address6_via_udp_socket_hack(LOG_DEBUG,
+                                                      AF_INET6,
+                                                      &addr6_to_check);
+
+  tt_int_op(retval,==,retval_reference);
+  tt_assert( (retval == -1 && retval_reference == -1) ||
+             (tor_addr_compare(&addr6,&addr6_to_check,CMP_EXACT) == 0) );
+
+#endif
+
+  /* When family is neither AF_INET nor AF_INET6, we want _hack to
+   * fail and return -1.
+   */
+
+  retval = get_interface_address6_via_udp_socket_hack(LOG_DEBUG,
+                                                      AF_CCITT,&addr4);
+
+  tt_assert(retval == -1);
+
+  done:
+  return;
+}
+
 #define ADDRESS_TEST(name, flags) \
   { #name, test_address_ ## name, flags, NULL, NULL }
 
 struct testcase_t address_tests[] = {
+  ADDRESS_TEST(udp_socket_trick_whitebox, TT_FORK),
+  ADDRESS_TEST(udp_socket_trick_blackbox, TT_FORK),
 #ifdef HAVE_IFADDRS_TO_SMARTLIST
   ADDRESS_TEST(get_if_addrs_ifaddrs, TT_FORK),
   ADDRESS_TEST(ifaddrs_to_smartlist, 0),