[2028] use different ports for socket session forwarding tests.

the deviant solaris implementatio seems to prevent the reuse of the same port
if the socket is forwarded.

src/lib/python/isc/util/cio/tests/socketsession_test.py

@@ -22,6 +22,8 @@ TESTDATA_OBJDIR = os.getenv("TESTDATAOBJDIR")
 TEST_UNIX_FILE = TESTDATA_OBJDIR + '/ssessiontest.unix'
 TEST_DATA = b'BIND10 test'
 TEST_PORT = 53535
+TEST_PORT2 = 53536
+TEST_PORT3 = 53537
 
 class TestForwarder(unittest.TestCase):
     '''In general, this is a straightforward port of the C++ counterpart.
@@ -179,8 +181,11 @@ class TestForwarder(unittest.TestCase):
             self.assertEqual(TEST_DATA, client_sock.recv(len(TEST_DATA)))
 
     def test_push_and_pop(self):
-        # This is a straightforward port of C++ pushAndPop test.
+        # This is a straightforward port of C++ pushAndPop test.  See the
+        # C++ version why we use multiple ports for "local".
         local6 = ('::1', TEST_PORT, 0, 0)
+        local6_alt = ('::1', TEST_PORT2, 0, 0)
+        local6_alt2 = ('::1', TEST_PORT3, 0, 0)
         remote6 = ('2001:db8::1', 5300, 0, 0)
         self.check_push_and_pop(AF_INET6, SOCK_DGRAM, IPPROTO_UDP,
                                 local6, remote6, TEST_DATA, True)
@@ -188,6 +193,7 @@ class TestForwarder(unittest.TestCase):
                                 local6, remote6, TEST_DATA, False)
 
         local4 = ('127.0.0.1', TEST_PORT)
+        local4_alt = ('127.0.0.1', TEST_PORT2)
         remote4 = ('192.0.2.2', 5300)
         self.check_push_and_pop(AF_INET, SOCK_DGRAM, IPPROTO_UDP,
                                 local4, remote4, TEST_DATA, False)
@@ -195,11 +201,11 @@ class TestForwarder(unittest.TestCase):
                                 local4, remote4, TEST_DATA, False)
 
         self.check_push_and_pop(AF_INET6, SOCK_DGRAM, IPPROTO_UDP,
-                                local6, remote6, self.large_text, False)
+                                local6_alt, remote6, self.large_text, False)
         self.check_push_and_pop(AF_INET6, SOCK_STREAM, IPPROTO_TCP,
                                 local6, remote6, self.large_text, False)
         self.check_push_and_pop(AF_INET, SOCK_DGRAM, IPPROTO_UDP,
-                                local4, remote4, self.large_text, False)
+                                local4_alt, remote4, self.large_text, False)
         self.check_push_and_pop(AF_INET, SOCK_STREAM, IPPROTO_TCP,
                                 local4, remote4, self.large_text, False)
 
@@ -207,7 +213,7 @@ class TestForwarder(unittest.TestCase):
         # scope (zone) ID
         scope6 = ('fe80::1', TEST_PORT, 0, 1)
         self.check_push_and_pop(AF_INET6, SOCK_DGRAM, IPPROTO_UDP,
-                                local6, scope6, TEST_DATA, False)
+                                local6_alt2, scope6, TEST_DATA, False)
 
     def test_push_too_fast(self):
         # A straightforward port of C++ pushTooFast test.

src/lib/util/tests/socketsession_unittest.cc

@@ -53,6 +53,7 @@ namespace {
 
 const char* const TEST_UNIX_FILE = TEST_DATA_TOPBUILDDIR "/test.unix";
 const char* const TEST_PORT = "53535";
+const char* const TEST_PORT2 = "53536"; // use this in case we need 2 ports
 const char TEST_DATA[] = "BIND10 test";
 
 // A simple helper structure to automatically close test sockets on return
@@ -540,8 +541,12 @@ ForwardTest::checkPushAndPop(int family, int type, int protocol,
 }
 
 TEST_F(ForwardTest, pushAndPop) {
-    // Pass a UDP/IPv6 session.
+    // Pass a UDP/IPv6 session.  We use different ports for different UDP
+    // tests because Solaris 11 seems to prohibit reusing the same port for
+    // some short period once the socket FD is forwarded, even if the sockets
+    // are closed.  See Trac #2028.
     const SockAddrInfo sai_local6(getSockAddr("::1", TEST_PORT));
+    const SockAddrInfo sai_local6_alt(getSockAddr("::1", TEST_PORT2));
     const SockAddrInfo sai_remote6(getSockAddr("2001:db8::1", "5300"));
     {
         SCOPED_TRACE("Passing UDP/IPv6 session");
@@ -559,6 +564,7 @@ TEST_F(ForwardTest, pushAndPop) {
     // receiver, which should be usable for multiple attempts of passing,
     // regardless of family of the passed session
     const SockAddrInfo sai_local4(getSockAddr("127.0.0.1", TEST_PORT));
+    const SockAddrInfo sai_local4_alt(getSockAddr("127.0.0.1", TEST_PORT2));
     const SockAddrInfo sai_remote4(getSockAddr("192.0.2.2", "5300"));
     {
         SCOPED_TRACE("Passing UDP/IPv4 session");
@@ -575,7 +581,7 @@ TEST_F(ForwardTest, pushAndPop) {
     // Also try large data
     {
         SCOPED_TRACE("Passing UDP/IPv6 session with large data");
-        checkPushAndPop(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, sai_local6,
+        checkPushAndPop(AF_INET6, SOCK_DGRAM, IPPROTO_UDP, sai_local6_alt,
                         sai_remote6, large_text_.c_str(), large_text_.length(),
                         false);
     }
@@ -587,7 +593,7 @@ TEST_F(ForwardTest, pushAndPop) {
     }
     {
         SCOPED_TRACE("Passing UDP/IPv4 session with large data");
-        checkPushAndPop(AF_INET, SOCK_DGRAM, IPPROTO_UDP, sai_local4,
+        checkPushAndPop(AF_INET, SOCK_DGRAM, IPPROTO_UDP, sai_local4_alt,
                         sai_remote4, large_text_.c_str(), large_text_.length(),
                         false);
     }