[5191] Remove experimental lightweight 4over6 option

doc/guide/dhcp6-srv.xml

@@ -1214,14 +1214,6 @@ temporarily override a list of interface names and listen on all interfaces.
 <row><entry>client-linklayer-addr</entry><entry>79</entry><entry>binary</entry><entry>false</entry></row>
 <!-- <row><entry>dhcpv4-message</entry><entry>87</entry><entry>binary</entry><entry>false</entry></row> -->
 <row><entry>dhcp4o6-server-addr</entry><entry>88</entry><entry>ipv6-address</entry><entry>true</entry></row>
-<row><entry>s46-rule</entry><entry>89</entry><entry>record (uint8, uint8, uint8, ipv4-address, ipv6-prefix)</entry><entry>false</entry></row>
-<row><entry>s46-br</entry><entry>90</entry><entry>ipv6-address</entry><entry>false</entry></row>
-<row><entry>s46-dmr</entry><entry>91</entry><entry>ipv6-prefix</entry><entry>false</entry></row>
-<row><entry>s46-v4v6bind</entry><entry>92</entry><entry>record (ipv4-address, ipv6-prefix)</entry><entry>false</entry></row>
-<row><entry>s46-portparams</entry><entry>93</entry><entry>record(uint8, psid)</entry><entry>false</entry></row>
-<row><entry>s46-cont-mape</entry><entry>94</entry><entry>empty</entry><entry>false</entry></row>
-<row><entry>s46-cont-mapt</entry><entry>95</entry><entry>empty</entry><entry>false</entry></row>
-<row><entry>s46-cont-lw</entry><entry>96</entry><entry>empty</entry><entry>false</entry></row>
         </tbody>
         </tgroup>
       </table>
@@ -1249,187 +1241,6 @@ temporarily override a list of interface names and listen on all interfaces.
     </para>
     </section>
 
-    <section id="s46-options">
-      <title>Common Softwire46 Options</title>
-      <para>
-        Softwire46 options are involved in IPv4 over IPv6 provisioning by
-        means of tunneling or translation as specified in the
-        <ulink url="http://tools.ietf.org/html/rfc7598">RFC 7598</ulink>.
-        The following sections provide configuration examples of these
-        options.
-      </para>
-
-      <section id="s46-containers">
-      <title>Softwire46 Container Options</title>
-      <para>
-        S46 container options group rules and optional port parameters
-        for a specified domain. There are three container options specified
-        in the "dhcp6" (top level) option space: MAP-E Container option,
-        MAP-T Container option and S46 Lightweight 4over6 Container option.
-        These options only contain encapsulated options specified below.
-        They do not include any data fields.
-      </para>
-
-      <para>
-        In order to configure the server to send specific container option
-        along with all encapsulated options, the container option must be
-        included in the server configuration as shown below:
-<screen>
-"Dhcp6": {
-    ...
-    "option-data": [
-        {
-            "name": "s46-cont-mape"
-        } ],
-    ...
-}
-</screen>
-
-        This configuration will cause the server to include MAP-E Container
-        option to the client. Use "s46-cont-mapt" or "s46-cont-lw" for the
-        MAP-T Container and S46 Lightweight 4over6 Container options
-        respectively.
-      </para>
-
-      <para>
-        All remaining softwire options described below are included in one
-        of the container options. Thus, they have to be included in appropriate
-        option spaces by selecting a "space" name, which specifies in which
-        option they are supposed to be included.
-      </para>
-    </section>
-
-      <section>
-        <title>S46 Rule Option</title>
-        <para>
-          The S46 Rule option is used for conveying the Basic Mapping Rule (BMR)
-          and Forwarding Mapping Rule (FMR).
-<screen>
-{
-    "space": "s46-cont-mape-options",
-    "name": "s46-rule",
-    "data": "128, 0, 24, 192.0.2.0, 2001:db8:1::/64"
-}
-</screen>
-         Other possible "space" value is "s46-cont-mapt-options".
-        </para>
-
-        <para>
-          The S46 Rule option conveys a number of parameters:
-
-      <itemizedlist>
-        <listitem>
-          <simpara><command>flags</command>, an unsigned 8 bits integer, with
-          currently only the most significant bit specified. It denotes whether
-          the rule can be used for forwarding (128) or not (0).
-          </simpara>
-        </listitem>
-
-        <listitem>
-          <simpara><command>ea-len</command>, an 8 bits long Embedded Address length. Allowed values
-          range from 0 to 48.</simpara>
-        </listitem>
-
-        <listitem>
-          <simpara><command>IPv4 prefix length</command>, 8 bits long; expresses the prefix length of the
-          Rule IPv4 prefix specified in the ipv4-prefix field.  Allowed
-          values range from 0 to 32.</simpara>
-        </listitem>
-
-        <listitem>
-          <simpara><command>IPv4 prefix</command>, a fixed-length 32-bit field that specifies the IPv4
-          prefix for the S46 rule.  The bits in the prefix after prefix4-len
-          number of bits are reserved and MUST be initialized to zero by the
-          sender and ignored by the receiver.</simpara>
-        </listitem>
-
-        <listitem>
-          <simpara><command>IPv6 prefix</command> in prefix/length notation that specifies the IPv6 domain
-          prefix for the S46 rule.  The field is padded on the right with zero
-          bits up to the nearest octet boundary when prefix6-len is not evenly
-          divisible by 8.</simpara>
-        </listitem>
-
-      </itemizedlist>
-        </para>
-      </section>
-        <section>
-            <title>S46 BR Option</title>
-            <para>
-              The S46 BR option is used to convey the IPv6 address of the
-              Border Relay. This option is mandatory in the MAP-E
-              Container option and not permitted in the MAP-T and
-              S46 Lightweight 4over6 Container options.
-<screen>
-{
-    "space": "s46-cont-mape-options",
-    "name": "s46-br",
-    "data": "2001:db8:cafe::1",
-}
-</screen>
-           Other possible "space" value is "s46-cont-lw-options".
-          </para>
-        </section>
-
-        <section>
-            <title>S46 DMR Option</title>
-            <para>
-              The S46 DMR option is used to convey values for the Default
-              Mapping Rule (DMR). This option is mandatory in the MAP-T
-              container option and not permitted in the MAP-E and S46
-              Lightweight 4over6 Container options.
-<screen>
-{
-    "space": "s46-cont-mapt-options",
-    "name": "s46-dmr",
-    "data": "2001:db8:cafe::/64",
-}
-</screen>
-              This option must not be included in other containers.
-            </para>
-        </section>
-
-        <section>
-            <title>S46 IPv4/IPv6 Address Binding option.</title>
-            <para>
-              The S46 IPv4/IPv6 Address Binding option may be used to specify
-              the full or shared IPv4 address of the Customer Edge (CE).
-              The IPv6 prefix field is used by the CE to identify the
-              correct prefix to use for the tunnel source.
-<screen>
-{
-    "space": "s46-cont-lw",
-    "name": "s46-v4v6bind",
-    "data": "192.0.2.3, 2001:db8:1:cafe::/64"
-}
-</screen>
-            This option must not be included in other containers.
-          </para>
-        </section>
-        <section>
-            <title>S46 Port Parameters</title>
-            <para>
-              The S46 Port Parameters option specifies optional port set
-              information that MAY be provided to CEs
-<screen>
-{
-    "space": "s46-rule-options",
-    "name": "s46-portparams",
-    "data": "2, 3/4",
-}
-</screen>
-              Other possible "space" value is "s46-v4v6bind" to include
-              this option in the S46 IPv4/IPv6 Address Binding option.
-            </para>
-            <para>
-              Note that the second value in the example above specifies the
-              PSID and PSID length fields in the format of PSID/PSID length.
-              This is equivalent to the values of PSID-len=4 and
-              PSID=12288 conveyed in the S46 Port Parameters option.
-            </para>
-        </section>
-    </section>
-
     <section id="dhcp6-custom-options">
       <title>Custom DHCPv6 Options</title>
       <para>It is possible to define options in addition to the standard ones.
@@ -4166,20 +3977,18 @@ If not specified, the default value is:
           different for each pool.
         </para>
         <para>
-          Let's consider a lightweight 4over6 deployment as an example. It is an
-          IPv6 transition technology that allows mapping IPv6 prefix into full
-          or parts of IPv4 addresses. In DHCP context, these are certain
-          parameters that are supposed to be delivered to clients in form of
-          additional options. Values of those options are correlated to
-          delegated prefixes, so it is reasonable to keep those parameters
-          together with the PD pool. On the other hand, lightweight 4over6 is
-          not a commonly used feature, so it is not a part of the base Kea
-          code. The solution to this problem is to use user context. For each PD
-          pool that is expected to be used for lightweight 4over6, user context
-          with extra parameters is defined. Those extra parameters will be used
-          by hook library that would be loaded only when dynamic calculation of
-          the lightweight 4over6 option is actually needed. An example
-          configuration looks as follows:
+          Let's consider an example where certain parameters are supposed
+          to be delivered to clients in form of additional options,
+          and the values of those options are correlated to delegated
+          prefixes. It seems reasonable to keep those parameters with
+          the the definition of the PD pool. On the other hand, this
+          functionality is is not part of the base Kea code so Kea will
+          not understand any hook-specific keywords in that definition.
+          The solution to this problem is to use user context. For
+          each PD pool that is expected to be used with this feature,
+          a "user context" is defined.  This is a structure that holds the
+          parameters used by the hook library when it is loaded.
+          An example configuration could look as follows:
           <screen>
 "Dhcp4": {
     "subnet6": [ {
@@ -4189,10 +3998,10 @@ If not specified, the default value is:
             "prefix-len": 56,
             "delegated-len": 64,
             <userinput>"user-context": {
-                "lw4over6-sharing-ratio": 64,
-                "lw4over6-v4-pool": "192.0.2.0/24",
-                "lw4over6-sysports-exclude": true,
-                "lw4over6-bind-prefix-len": 56
+                "sharing-ratio": 64,
+                "v4-pool": "192.0.2.0/24",
+                "sysports-exclude": true,
+                "bind-prefix-len": 56
             }</userinput>
         } ],
         "subnet": "2001:db8::/32"
@@ -4202,8 +4011,8 @@ If not specified, the default value is:
         </para>
 
         <para>
-          It should be noted that Kea will not use any information in the user
-          context, but will simply store and make it available to the hook
+          Kea does not interpret or use the information in the user context:
+          it just stores it makes it available to the hook
           libraries. It is up to the hook library to extract that information
           and make use of it.
         </para>
@@ -4285,13 +4094,6 @@ If not specified, the default value is:
             7550</ulink>: All recommendations related to the DHCPv6 server
             operation are supported.</simpara>
           </listitem>
-          <listitem>
-            <simpara><emphasis>DHCPv6 Options for Configuration of Softwire
-            Address and Port-Mapped Clients</emphasis>,
-            <ulink url="http://tools.ietf.org/html/rfc7598">RFC
-            7598</ulink>: All options specified in this specification are
-            supported by the DHCPv6 server.</simpara>
-          </listitem>
       </itemizedlist>
     </section>
 

src/lib/dhcp/dhcp6.h

@@ -104,14 +104,6 @@
 //#define D6O_V6_PCP_SERVER                       86 /* RFC7291 */
 #define D6O_DHCPV4_MSG                          87 /* RFC7341 */
 #define D6O_DHCPV4_O_DHCPV6_SERVER              88 /* RFC7341 */
-#define D6O_S46_RULE                            89 /* RFC7598 */
-#define D6O_S46_BR                              90 /* RFC7598 */
-#define D6O_S46_DMR                             91 /* RFC7598 */
-#define D6O_S46_V4V6BIND                        92 /* RFC7598 */
-#define D6O_S46_PORTPARAMS                      93 /* RFC7598 */
-#define D6O_S46_CONT_MAPE                       94 /* RFC7598 */
-#define D6O_S46_CONT_MAPT                       95 /* RFC7598 */
-#define D6O_S46_CONT_LW                         96 /* RFC7598 */
 //#define D6O_4RD                                 97 /* RFC7600 */
 //#define D6O_4RD_MAP_RULE                        98 /* RFC7600 */
 //#define D6O_4RD_NON_MAP_RULE                    99 /* RFC7600 */

src/lib/dhcp/std_option_defs.h

@@ -376,12 +376,6 @@ const OptionDefParams STANDARD_V6_OPTION_DEFINITIONS[] = {
     { "timestamp", D6O_TIMESTAMP, OPT_BINARY_TYPE, false,
       NO_RECORD_DEF, "" },
     { "aftr-name", D6O_AFTR_NAME, OPT_FQDN_TYPE, false, NO_RECORD_DEF, "" },
-    { "s46-cont-mape", D6O_S46_CONT_MAPE, OPT_EMPTY_TYPE, false, NO_RECORD_DEF,
-        MAPE_V6_OPTION_SPACE },
-    { "s46-cont-mapt", D6O_S46_CONT_MAPT, OPT_EMPTY_TYPE, false, NO_RECORD_DEF,
-        MAPT_V6_OPTION_SPACE },
-    { "s46-cont-lw", D6O_S46_CONT_LW, OPT_EMPTY_TYPE, false, NO_RECORD_DEF,
-        LW_V6_OPTION_SPACE }
 
     // @todo There is still a bunch of options for which we have to provide
     // definitions but we don't do it because they are not really
@@ -393,14 +387,6 @@ const int STANDARD_V6_OPTION_DEFINITIONS_SIZE =
     sizeof(STANDARD_V6_OPTION_DEFINITIONS) /
     sizeof(STANDARD_V6_OPTION_DEFINITIONS[0]);
 
-// Option definitions that belong to two or more option spaces are defined here.
-const OptionDefParams OPTION_DEF_PARAMS_S46_BR = { "s46-br", D6O_S46_BR,
-    OPT_IPV6_ADDRESS_TYPE, false, NO_RECORD_DEF, "" };
-const OptionDefParams OPTION_DEF_PARAMS_S46_RULE = { "s46-rule", D6O_S46_RULE,
-    OPT_RECORD_TYPE, false, RECORD_DEF(S46_RULE), V4V6_RULE_OPTION_SPACE };
-const OptionDefParams OPTION_DEF_PARAMS_S46_PORTPARAMS = { "s46-portparams",
-    D6O_S46_PORTPARAMS, OPT_RECORD_TYPE, false, RECORD_DEF(S46_PORTPARAMS), "" };
-
 /// @brief Definitions of vendor-specific DHCPv6 options, defined by ISC.
 /// 4o6-* options are used for inter-process communication. For details, see
 /// http://kea.isc.org/wiki/Dhcp4o6Design
@@ -420,52 +406,43 @@ const int ISC_V6_OPTION_DEFINITIONS_SIZE =
 
 /// @brief MAPE option definitions
 const OptionDefParams MAPE_V6_OPTION_DEFINITIONS[] = {
-    OPTION_DEF_PARAMS_S46_BR,
-    OPTION_DEF_PARAMS_S46_RULE
 };
 
 const int MAPE_V6_OPTION_DEFINITIONS_SIZE =
     sizeof(MAPE_V6_OPTION_DEFINITIONS) /
-    sizeof(MAPE_V6_OPTION_DEFINITIONS[0]);
+    sizeof(const OptionDefParams);
 
 /// @brief MAPT option definitions
 const OptionDefParams MAPT_V6_OPTION_DEFINITIONS[] = {
-    OPTION_DEF_PARAMS_S46_RULE,
-    { "s46-dmr", D6O_S46_DMR, OPT_IPV6_PREFIX_TYPE, false, NO_RECORD_DEF, "" }
 };
 
 const int MAPT_V6_OPTION_DEFINITIONS_SIZE =
     sizeof(MAPT_V6_OPTION_DEFINITIONS) /
-    sizeof(MAPT_V6_OPTION_DEFINITIONS[0]);
+    sizeof(const OptionDefParams);
 
 /// @brief LW option definitions
 const OptionDefParams LW_V6_OPTION_DEFINITIONS[] = {
-    OPTION_DEF_PARAMS_S46_BR,
-    { "s46-v4v6bind", D6O_S46_V4V6BIND, OPT_RECORD_TYPE, false,
-        RECORD_DEF(S46_V4V6BIND), V4V6_BIND_OPTION_SPACE }
 };
 
 const int LW_V6_OPTION_DEFINITIONS_SIZE =
     sizeof(LW_V6_OPTION_DEFINITIONS) /
-    sizeof(LW_V6_OPTION_DEFINITIONS[0]);
+    sizeof(const OptionDefParams);
 
 /// @brief Rule option definitions
 const OptionDefParams V4V6_RULE_OPTION_DEFINITIONS[] = {
-    OPTION_DEF_PARAMS_S46_PORTPARAMS
 };
 
 const int V4V6_RULE_OPTION_DEFINITIONS_SIZE =
     sizeof(V4V6_RULE_OPTION_DEFINITIONS) /
-    sizeof(V4V6_RULE_OPTION_DEFINITIONS[0]);
+    sizeof(const OptionDefParams);
 
 /// @brief Bind option definitions
 const OptionDefParams V4V6_BIND_OPTION_DEFINITIONS[] = {
-    OPTION_DEF_PARAMS_S46_PORTPARAMS
 };
 
 const int V4V6_BIND_OPTION_DEFINITIONS_SIZE =
     sizeof(V4V6_BIND_OPTION_DEFINITIONS) /
-    sizeof(V4V6_BIND_OPTION_DEFINITIONS[0]);
+    sizeof(const OptionDefParams);
 
 } // unnamed namespace
 

src/lib/dhcp/tests/libdhcp++_unittest.cc

@@ -1588,31 +1588,6 @@ TEST_F(LibDhcpTest, stdOptionDefs6) {
     LibDhcpTest::testStdOptionDefs6(D6O_TIMESTAMP, begin, begin + 8,
                                     typeid(Option));
 
-    // RFC7598 options
-    LibDhcpTest::testOptionDefs6(MAPE_V6_OPTION_SPACE, D6O_S46_RULE, begin, end,
-                                 typeid(OptionCustom), "s46-rule-options");
-    LibDhcpTest::testOptionDefs6(MAPT_V6_OPTION_SPACE, D6O_S46_RULE, begin, end,
-                                 typeid(OptionCustom), "s46-rule-options");
-    LibDhcpTest::testOptionDefs6(MAPE_V6_OPTION_SPACE, D6O_S46_BR, begin, end,
-                                 typeid(OptionCustom));
-    LibDhcpTest::testOptionDefs6(LW_V6_OPTION_SPACE, D6O_S46_BR, begin, end,
-                                 typeid(OptionCustom));
-    LibDhcpTest::testOptionDefs6(MAPT_V6_OPTION_SPACE, D6O_S46_DMR, begin, end,
-                                 typeid(OptionCustom));
-    LibDhcpTest::testOptionDefs6(LW_V6_OPTION_SPACE, D6O_S46_V4V6BIND, begin,
-                                 end, typeid(OptionCustom),
-                                 "s46-v4v6bind-options");
-    LibDhcpTest::testOptionDefs6(V4V6_RULE_OPTION_SPACE, D6O_S46_PORTPARAMS,
-                                 begin, end, typeid(OptionCustom), "");
-    LibDhcpTest::testStdOptionDefs6(D6O_S46_CONT_MAPE, begin, end,
-                                    typeid(OptionCustom),
-                                    "s46-cont-mape-options");
-    LibDhcpTest::testStdOptionDefs6(D6O_S46_CONT_MAPT, begin, end,
-                                    typeid(OptionCustom),
-                                    "s46-cont-mapt-options");
-    LibDhcpTest::testStdOptionDefs6(D6O_S46_CONT_LW, begin, end,
-                                    typeid(OptionCustom),
-                                    "s46-cont-lw-options");
 
 }
 

src/lib/dhcpsrv/tests/dhcp_parsers_unittest.cc

@@ -1047,56 +1047,6 @@ TEST_F(ParseConfigTest, optionDataCSVFormatWithOptionDef) {
     cfg2.runCfgOptionsTest(family_, config);
 }
 
-// This test verifies that definitions of standard encapsulated
-// options can be used.
-TEST_F(ParseConfigTest, encapsulatedOptionData) {
-    std::string config =
-        "{ \"option-data\": [ {"
-        "    \"space\": \"s46-cont-mape-options\","
-        "    \"name\": \"s46-rule\","
-        "    \"data\": \"1, 0, 24, 192.0.2.0, 2001:db8:1::/64\""
-        " } ]"
-        "}";
-
-    // Make sure that we're using correct universe.
-    family_ = AF_INET6;
-    int rcode = 0;
-    ASSERT_NO_THROW(rcode = parseConfiguration(config));
-    ASSERT_EQ(0, rcode);
-
-    // Verify that the option data is correct.
-    OptionCustomPtr s46_rule = boost::dynamic_pointer_cast<OptionCustom>
-        (getOptionPtr(MAPE_V6_OPTION_SPACE, D6O_S46_RULE));
-    ASSERT_TRUE(s46_rule);
-
-    uint8_t flags;
-    uint8_t ea_len;
-    uint8_t prefix4_len;
-    IOAddress ipv4_prefix(IOAddress::IPV4_ZERO_ADDRESS());
-    PrefixTuple ipv6_prefix(PrefixLen(0), IOAddress::IPV6_ZERO_ADDRESS());;
-
-    ASSERT_NO_THROW({
-        flags = s46_rule->readInteger<uint8_t>(0);
-        ea_len = s46_rule->readInteger<uint8_t>(1);
-        prefix4_len = s46_rule->readInteger<uint8_t>(2);
-        ipv4_prefix = s46_rule->readAddress(3);
-        ipv6_prefix = s46_rule->readPrefix(4);
-    });
-
-    EXPECT_EQ(1, flags);
-    EXPECT_EQ(0, ea_len);
-    EXPECT_EQ(24, prefix4_len);
-    EXPECT_EQ("192.0.2.0", ipv4_prefix.toText());
-    EXPECT_EQ(64, ipv6_prefix.first.asUnsigned());
-    EXPECT_EQ("2001:db8:1::", ipv6_prefix.second.toText());
-
-    ElementPtr expected = Element::fromJSON(config);
-    ElementPtr opt_data = expected->get("option-data")->getNonConst(0);
-    opt_data->set("code", Element::create(D6O_S46_RULE));
-    CfgOptionsTest cfg(CfgMgr::instance().getStagingCfg());
-    cfg.runCfgOptionsTest(family_, expected);
-}
-
 // This test checks behavior of the configuration parser for option data
 // for different values of csv-format parameter and when there is no
 // option definition.