diff --git a/config/sys-dev.config b/config/sys-dev.config
index 2e75e21..cb34008 100644
--- a/config/sys-dev.config
+++ b/config/sys-dev.config
@@ -38,9 +38,10 @@
       {port, 1366}
     ]},
 
-    {ipv6_assistor, [
+    {ipv6_assist, [
       {port, 1367},
-      {acceptor_nums, 5}
+      {acceptor_nums, 5},
+      {global_addr6, "2408:4005:318:4900:164a:b5c6:9023:ca8d"}
     ]},
 
     {pools, [
diff --git a/config/sys-prod.config b/config/sys-prod.config
index 294fa97..4681e83 100644
--- a/config/sys-prod.config
+++ b/config/sys-prod.config
@@ -38,9 +38,10 @@
       {port, 1366}
     ]},
 
-    {ipv6_assistor, [
+    {ipv6_assist, [
       {port, 1367},
-      {acceptor_nums, 5}
+      {acceptor_nums, 5},
+      {global_addr6, "2408:4005:318:4900:164a:b5c6:9023:ca8d"}
     ]},
 
     {pools, [
diff --git a/include/sdlan_pb.hrl b/include/sdlan_pb.hrl
index 12b1a8e..1effd8a 100644
--- a/include/sdlan_pb.hrl
+++ b/include/sdlan_pb.hrl
@@ -31,7 +31,8 @@
         {version = 0            :: non_neg_integer() | undefined, % = 1, optional, 32 bits
          max_bidi_streams = 0   :: non_neg_integer() | undefined, % = 2, optional, 32 bits
          max_packet_size = 0    :: non_neg_integer() | undefined, % = 3, optional, 32 bits
-         heartbeat_sec = 0      :: non_neg_integer() | undefined % = 4, optional, 32 bits
+         heartbeat_sec = 0      :: non_neg_integer() | undefined, % = 4, optional, 32 bits
+         ipv6_assist = undefined :: sdlan_pb:'SDLV6Info'() | undefined % = 5, optional
         }).
 -endif.
 
diff --git a/proto/sdlan.proto b/proto/sdlan.proto
index 40c30e0..ca60ec7 100644
--- a/proto/sdlan.proto
+++ b/proto/sdlan.proto
@@ -26,6 +26,8 @@ message SDLWelcome {
     uint32 max_packet_size = 3;
     // 心跳包的间隔
     uint32 heartbeat_sec = 4;
+    // ipv6辅助器地址
+    SDLV6Info ipv6_assist = 5;
 }
 
 // 这里修改成了扁平的结构, 否则有些字段不好找放的位置
diff --git a/src/quic/sdlan_quic_channel.erl b/src/quic/sdlan_quic_channel.erl
index f16ed4c..858b69a 100644
--- a/src/quic/sdlan_quic_channel.erl
+++ b/src/quic/sdlan_quic_channel.erl
@@ -56,6 +56,7 @@
     pending_commands = #{},
 
     ping_counter = 0,
+    ipv6_assist = undefined,
 
     %% 离线回调函数
     offline_cb :: undefined | fun()
@@ -100,7 +101,8 @@ start_link(Conn, Limits) when is_list(Limits) ->
 init([Conn, Limits]) ->
     MaxPacketSize = proplists:get_value(max_packet_size, Limits, 16384),
     HeartbeatSec = proplists:get_value(heartbeat_sec, Limits, 10),
-    {ok, initializing, #state{conn = Conn, max_packet_size = MaxPacketSize, heartbeat_sec = HeartbeatSec}, [{next_event, internal, do_init}]}.
+    Ipv6Assist = ipv6_assist_info(),
+    {ok, initializing, #state{conn = Conn, max_packet_size = MaxPacketSize, heartbeat_sec = HeartbeatSec, ipv6_assist = Ipv6Assist}, [{next_event, internal, do_init}]}.
 
 %% @private
 %% @doc This function is called by a gen_statem when it needs to find out
@@ -123,14 +125,15 @@ handle_event(info, {quic, dgram_state_changed, Conn, Opts = #{dgram_send_enabled
     logger:debug("[sdlan_quic_channel] dgram_state_changed, opts: ~p", [Opts]),
     {keep_state, State};
 
-handle_event(info, {quic, new_stream, Stream, Opts}, waiting_stream, State=#state{max_packet_size = MaxPacketSize, heartbeat_sec = HeartbeatSec}) ->
+handle_event(info, {quic, new_stream, Stream, Opts}, waiting_stream, State=#state{max_packet_size = MaxPacketSize, heartbeat_sec = HeartbeatSec, ipv6_assist = Ipv6Assist}) ->
     logger:debug("[sdlan_quic_channel] call new_stream: ~p, opts: ~p", [Stream, Opts]),
     %% 发送欢迎消息
     WelcomePkt = sdlan_pb:encode_msg(#'SDLWelcome'{
         version = 1,
         max_bidi_streams = 1,
         max_packet_size = MaxPacketSize,
-        heartbeat_sec = HeartbeatSec
+        heartbeat_sec = HeartbeatSec,
+        ipv6_assist = Ipv6Assist
     }),
     quic_send(Stream, <<?PACKET_WELCOME, WelcomePkt/binary>>),
     logger:debug("[sdlan_quic_channel] get stream: ~p, send welcome", [Stream]),
@@ -428,4 +431,20 @@ quic_send(Stream, Packet) when is_binary(Packet) ->
 get_rules(SrcIdentityId, DstIdentityId) when is_integer(SrcIdentityId), is_integer(DstIdentityId) ->
     SrcPolicyIds = identity_policy_ets:get_policies(SrcIdentityId),
     DstPolicyIds = identity_policy_ets:get_policies(DstIdentityId),
-    rule_ets:get_rules(SrcPolicyIds, DstPolicyIds).
\ No newline at end of file
+    rule_ets:get_rules(SrcPolicyIds, DstPolicyIds).
+
+-spec ipv6_assist_info() -> undefined | #'SDLV6Info'{}.
+ipv6_assist_info() ->
+    case application:get_env(sdlan, ipv6_assist) of
+        {ok, Props} ->
+            Port = proplists:get_value(port, Props, 0),
+            GlobalAddr6 = proplists:get_value(global_addr6, Props, <<"">>),
+            case {Port, sdlan_util:ipv6_to_bytes(GlobalAddr6)} of
+                {Port0, V6Bytes = <<_:128>>} when is_integer(Port0), Port0 > 0 ->
+                    #'SDLV6Info'{port = Port0, v6 = V6Bytes};
+                _ ->
+                    undefined
+            end;
+        _ ->
+            undefined
+    end.
diff --git a/src/sdlan_pb.erl b/src/sdlan_pb.erl
index 1c645c2..814f49f 100644
--- a/src/sdlan_pb.erl
+++ b/src/sdlan_pb.erl
@@ -47,7 +47,7 @@
 -export([gpb_version_source/0]).
 
 -include("sdlan_pb.hrl").
--include_lib("gpb/include/gpb.hrl").
+-include("gpb.hrl").
 
 %% enumerated types
 
@@ -224,7 +224,7 @@ encode_msg_SDLV6Info(#'SDLV6Info'{port = F1, v6 = F2}, Bin, TrUserData) ->
 encode_msg_SDLWelcome(Msg, TrUserData) -> encode_msg_SDLWelcome(Msg, <<>>, TrUserData).
 
 
-encode_msg_SDLWelcome(#'SDLWelcome'{version = F1, max_bidi_streams = F2, max_packet_size = F3, heartbeat_sec = F4}, Bin, TrUserData) ->
+encode_msg_SDLWelcome(#'SDLWelcome'{version = F1, max_bidi_streams = F2, max_packet_size = F3, heartbeat_sec = F4, ipv6_assist = F5}, Bin, TrUserData) ->
     B1 = if F1 == undefined -> Bin;
             true ->
                 begin
@@ -252,12 +252,21 @@ encode_msg_SDLWelcome(#'SDLWelcome'{version = F1, max_bidi_streams = F2, max_pac
                     end
                 end
          end,
-    if F4 == undefined -> B3;
+    B4 = if F4 == undefined -> B3;
+            true ->
+                begin
+                    TrF4 = id(F4, TrUserData),
+                    if TrF4 =:= 0 -> B3;
+                       true -> e_varint(TrF4, <<B3/binary, 32>>, TrUserData)
+                    end
+                end
+         end,
+    if F5 == undefined -> B4;
        true ->
            begin
-               TrF4 = id(F4, TrUserData),
-               if TrF4 =:= 0 -> B3;
-                  true -> e_varint(TrF4, <<B3/binary, 32>>, TrUserData)
+               TrF5 = id(F5, TrUserData),
+               if TrF5 =:= undefined -> B4;
+                  true -> e_mfield_SDLWelcome_ipv6_assist(TrF5, <<B4/binary, 42>>, TrUserData)
                end
            end
     end.
@@ -1068,6 +1077,11 @@ encode_msg_SDLRegisterAck(#'SDLRegisterAck'{network_id = F1, src_mac = F2, dst_m
            end
     end.
 
+e_mfield_SDLWelcome_ipv6_assist(Msg, Bin, TrUserData) ->
+    SubBin = encode_msg_SDLV6Info(Msg, <<>>, TrUserData),
+    Bin2 = e_varint(byte_size(SubBin), Bin),
+    <<Bin2/binary, SubBin/binary>>.
+
 e_mfield_SDLPeerInfo_v4_info(Msg, Bin, TrUserData) ->
     SubBin = encode_msg_SDLV4Info(Msg, <<>>, TrUserData),
     Bin2 = e_varint(byte_size(SubBin), Bin),
@@ -1384,70 +1398,88 @@ skip_32_SDLV6Info(<<_:32, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, TrUserData) -> d
 
 skip_64_SDLV6Info(<<_:64, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, TrUserData) -> dfp_read_field_def_SDLV6Info(Rest, Z1, Z2, F, F@_1, F@_2, TrUserData).
 
-decode_msg_SDLWelcome(Bin, TrUserData) -> dfp_read_field_def_SDLWelcome(Bin, 0, 0, 0, id(0, TrUserData), id(0, TrUserData), id(0, TrUserData), id(0, TrUserData), TrUserData).
+decode_msg_SDLWelcome(Bin, TrUserData) -> dfp_read_field_def_SDLWelcome(Bin, 0, 0, 0, id(0, TrUserData), id(0, TrUserData), id(0, TrUserData), id(0, TrUserData), id(undefined, TrUserData), TrUserData).
 
-dfp_read_field_def_SDLWelcome(<<8, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData) -> d_field_SDLWelcome_version(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-dfp_read_field_def_SDLWelcome(<<16, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData) -> d_field_SDLWelcome_max_bidi_streams(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-dfp_read_field_def_SDLWelcome(<<24, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData) -> d_field_SDLWelcome_max_packet_size(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-dfp_read_field_def_SDLWelcome(<<32, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData) -> d_field_SDLWelcome_heartbeat_sec(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-dfp_read_field_def_SDLWelcome(<<>>, 0, 0, _, F@_1, F@_2, F@_3, F@_4, _) -> #'SDLWelcome'{version = F@_1, max_bidi_streams = F@_2, max_packet_size = F@_3, heartbeat_sec = F@_4};
-dfp_read_field_def_SDLWelcome(Other, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData) -> dg_read_field_def_SDLWelcome(Other, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData).
+dfp_read_field_def_SDLWelcome(<<8, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> d_field_SDLWelcome_version(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+dfp_read_field_def_SDLWelcome(<<16, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> d_field_SDLWelcome_max_bidi_streams(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+dfp_read_field_def_SDLWelcome(<<24, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> d_field_SDLWelcome_max_packet_size(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+dfp_read_field_def_SDLWelcome(<<32, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> d_field_SDLWelcome_heartbeat_sec(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+dfp_read_field_def_SDLWelcome(<<42, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> d_field_SDLWelcome_ipv6_assist(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+dfp_read_field_def_SDLWelcome(<<>>, 0, 0, _, F@_1, F@_2, F@_3, F@_4, F@_5, _) -> #'SDLWelcome'{version = F@_1, max_bidi_streams = F@_2, max_packet_size = F@_3, heartbeat_sec = F@_4, ipv6_assist = F@_5};
+dfp_read_field_def_SDLWelcome(Other, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> dg_read_field_def_SDLWelcome(Other, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData).
 
-dg_read_field_def_SDLWelcome(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData) when N < 32 - 7 -> dg_read_field_def_SDLWelcome(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-dg_read_field_def_SDLWelcome(<<0:1, X:7, Rest/binary>>, N, Acc, _, F@_1, F@_2, F@_3, F@_4, TrUserData) ->
+dg_read_field_def_SDLWelcome(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) when N < 32 - 7 -> dg_read_field_def_SDLWelcome(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+dg_read_field_def_SDLWelcome(<<0:1, X:7, Rest/binary>>, N, Acc, _, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) ->
     Key = X bsl N + Acc,
     case Key of
-        8 -> d_field_SDLWelcome_version(Rest, 0, 0, 0, F@_1, F@_2, F@_3, F@_4, TrUserData);
-        16 -> d_field_SDLWelcome_max_bidi_streams(Rest, 0, 0, 0, F@_1, F@_2, F@_3, F@_4, TrUserData);
-        24 -> d_field_SDLWelcome_max_packet_size(Rest, 0, 0, 0, F@_1, F@_2, F@_3, F@_4, TrUserData);
-        32 -> d_field_SDLWelcome_heartbeat_sec(Rest, 0, 0, 0, F@_1, F@_2, F@_3, F@_4, TrUserData);
+        8 -> d_field_SDLWelcome_version(Rest, 0, 0, 0, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+        16 -> d_field_SDLWelcome_max_bidi_streams(Rest, 0, 0, 0, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+        24 -> d_field_SDLWelcome_max_packet_size(Rest, 0, 0, 0, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+        32 -> d_field_SDLWelcome_heartbeat_sec(Rest, 0, 0, 0, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+        42 -> d_field_SDLWelcome_ipv6_assist(Rest, 0, 0, 0, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
         _ ->
             case Key band 7 of
-                0 -> skip_varint_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, TrUserData);
-                1 -> skip_64_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, TrUserData);
-                2 -> skip_length_delimited_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, TrUserData);
-                3 -> skip_group_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, TrUserData);
-                5 -> skip_32_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, TrUserData)
+                0 -> skip_varint_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+                1 -> skip_64_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+                2 -> skip_length_delimited_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+                3 -> skip_group_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+                5 -> skip_32_SDLWelcome(Rest, 0, 0, Key bsr 3, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData)
             end
     end;
-dg_read_field_def_SDLWelcome(<<>>, 0, 0, _, F@_1, F@_2, F@_3, F@_4, _) -> #'SDLWelcome'{version = F@_1, max_bidi_streams = F@_2, max_packet_size = F@_3, heartbeat_sec = F@_4}.
+dg_read_field_def_SDLWelcome(<<>>, 0, 0, _, F@_1, F@_2, F@_3, F@_4, F@_5, _) -> #'SDLWelcome'{version = F@_1, max_bidi_streams = F@_2, max_packet_size = F@_3, heartbeat_sec = F@_4, ipv6_assist = F@_5}.
 
-d_field_SDLWelcome_version(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData) when N < 57 -> d_field_SDLWelcome_version(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-d_field_SDLWelcome_version(<<0:1, X:7, Rest/binary>>, N, Acc, F, _, F@_2, F@_3, F@_4, TrUserData) ->
+d_field_SDLWelcome_version(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) when N < 57 -> d_field_SDLWelcome_version(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+d_field_SDLWelcome_version(<<0:1, X:7, Rest/binary>>, N, Acc, F, _, F@_2, F@_3, F@_4, F@_5, TrUserData) ->
     {NewFValue, RestF} = {id((X bsl N + Acc) band 4294967295, TrUserData), Rest},
-    dfp_read_field_def_SDLWelcome(RestF, 0, 0, F, NewFValue, F@_2, F@_3, F@_4, TrUserData).
+    dfp_read_field_def_SDLWelcome(RestF, 0, 0, F, NewFValue, F@_2, F@_3, F@_4, F@_5, TrUserData).
 
-d_field_SDLWelcome_max_bidi_streams(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData) when N < 57 -> d_field_SDLWelcome_max_bidi_streams(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-d_field_SDLWelcome_max_bidi_streams(<<0:1, X:7, Rest/binary>>, N, Acc, F, F@_1, _, F@_3, F@_4, TrUserData) ->
+d_field_SDLWelcome_max_bidi_streams(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) when N < 57 -> d_field_SDLWelcome_max_bidi_streams(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+d_field_SDLWelcome_max_bidi_streams(<<0:1, X:7, Rest/binary>>, N, Acc, F, F@_1, _, F@_3, F@_4, F@_5, TrUserData) ->
     {NewFValue, RestF} = {id((X bsl N + Acc) band 4294967295, TrUserData), Rest},
-    dfp_read_field_def_SDLWelcome(RestF, 0, 0, F, F@_1, NewFValue, F@_3, F@_4, TrUserData).
+    dfp_read_field_def_SDLWelcome(RestF, 0, 0, F, F@_1, NewFValue, F@_3, F@_4, F@_5, TrUserData).
 
-d_field_SDLWelcome_max_packet_size(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData) when N < 57 -> d_field_SDLWelcome_max_packet_size(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-d_field_SDLWelcome_max_packet_size(<<0:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, _, F@_4, TrUserData) ->
+d_field_SDLWelcome_max_packet_size(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) when N < 57 -> d_field_SDLWelcome_max_packet_size(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+d_field_SDLWelcome_max_packet_size(<<0:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, _, F@_4, F@_5, TrUserData) ->
     {NewFValue, RestF} = {id((X bsl N + Acc) band 4294967295, TrUserData), Rest},
-    dfp_read_field_def_SDLWelcome(RestF, 0, 0, F, F@_1, F@_2, NewFValue, F@_4, TrUserData).
+    dfp_read_field_def_SDLWelcome(RestF, 0, 0, F, F@_1, F@_2, NewFValue, F@_4, F@_5, TrUserData).
 
-d_field_SDLWelcome_heartbeat_sec(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData) when N < 57 -> d_field_SDLWelcome_heartbeat_sec(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-d_field_SDLWelcome_heartbeat_sec(<<0:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, _, TrUserData) ->
+d_field_SDLWelcome_heartbeat_sec(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) when N < 57 -> d_field_SDLWelcome_heartbeat_sec(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+d_field_SDLWelcome_heartbeat_sec(<<0:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, _, F@_5, TrUserData) ->
     {NewFValue, RestF} = {id((X bsl N + Acc) band 4294967295, TrUserData), Rest},
-    dfp_read_field_def_SDLWelcome(RestF, 0, 0, F, F@_1, F@_2, F@_3, NewFValue, TrUserData).
+    dfp_read_field_def_SDLWelcome(RestF, 0, 0, F, F@_1, F@_2, F@_3, NewFValue, F@_5, TrUserData).
 
-skip_varint_SDLWelcome(<<1:1, _:7, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData) -> skip_varint_SDLWelcome(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-skip_varint_SDLWelcome(<<0:1, _:7, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData) -> dfp_read_field_def_SDLWelcome(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData).
+d_field_SDLWelcome_ipv6_assist(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) when N < 57 -> d_field_SDLWelcome_ipv6_assist(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+d_field_SDLWelcome_ipv6_assist(<<0:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, Prev, TrUserData) ->
+    {NewFValue, RestF} = begin Len = X bsl N + Acc, <<Bs:Len/binary, Rest2/binary>> = Rest, {id(decode_msg_SDLV6Info(Bs, TrUserData), TrUserData), Rest2} end,
+    dfp_read_field_def_SDLWelcome(RestF,
+                                  0,
+                                  0,
+                                  F,
+                                  F@_1,
+                                  F@_2,
+                                  F@_3,
+                                  F@_4,
+                                  if Prev == undefined -> NewFValue;
+                                     true -> merge_msg_SDLV6Info(Prev, NewFValue, TrUserData)
+                                  end,
+                                  TrUserData).
 
-skip_length_delimited_SDLWelcome(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData) when N < 57 -> skip_length_delimited_SDLWelcome(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData);
-skip_length_delimited_SDLWelcome(<<0:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, TrUserData) ->
+skip_varint_SDLWelcome(<<1:1, _:7, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> skip_varint_SDLWelcome(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+skip_varint_SDLWelcome(<<0:1, _:7, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> dfp_read_field_def_SDLWelcome(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData).
+
+skip_length_delimited_SDLWelcome(<<1:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) when N < 57 -> skip_length_delimited_SDLWelcome(Rest, N + 7, X bsl N + Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData);
+skip_length_delimited_SDLWelcome(<<0:1, X:7, Rest/binary>>, N, Acc, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) ->
     Length = X bsl N + Acc,
     <<_:Length/binary, Rest2/binary>> = Rest,
-    dfp_read_field_def_SDLWelcome(Rest2, 0, 0, F, F@_1, F@_2, F@_3, F@_4, TrUserData).
+    dfp_read_field_def_SDLWelcome(Rest2, 0, 0, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData).
 
-skip_group_SDLWelcome(Bin, _, Z2, FNum, F@_1, F@_2, F@_3, F@_4, TrUserData) ->
+skip_group_SDLWelcome(Bin, _, Z2, FNum, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) ->
     {_, Rest} = read_group(Bin, FNum),
-    dfp_read_field_def_SDLWelcome(Rest, 0, Z2, FNum, F@_1, F@_2, F@_3, F@_4, TrUserData).
+    dfp_read_field_def_SDLWelcome(Rest, 0, Z2, FNum, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData).
 
-skip_32_SDLWelcome(<<_:32, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData) -> dfp_read_field_def_SDLWelcome(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData).
+skip_32_SDLWelcome(<<_:32, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> dfp_read_field_def_SDLWelcome(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData).
 
-skip_64_SDLWelcome(<<_:64, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData) -> dfp_read_field_def_SDLWelcome(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, TrUserData).
+skip_64_SDLWelcome(<<_:64, Rest/binary>>, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData) -> dfp_read_field_def_SDLWelcome(Rest, Z1, Z2, F, F@_1, F@_2, F@_3, F@_4, F@_5, TrUserData).
 
 decode_msg_SDLRegisterSuper(Bin, TrUserData) ->
     dfp_read_field_def_SDLRegisterSuper(Bin, 0, 0, 0, id(<<>>, TrUserData), id(0, TrUserData), id(<<>>, TrUserData), id(0, TrUserData), id(0, TrUserData), id(<<>>, TrUserData), id(<<>>, TrUserData), id(<<>>, TrUserData), TrUserData).
@@ -3081,8 +3113,8 @@ merge_msg_SDLV6Info(#'SDLV6Info'{port = PFport, v6 = PFv6}, #'SDLV6Info'{port =
                      end}.
 
 -compile({nowarn_unused_function,merge_msg_SDLWelcome/3}).
-merge_msg_SDLWelcome(#'SDLWelcome'{version = PFversion, max_bidi_streams = PFmax_bidi_streams, max_packet_size = PFmax_packet_size, heartbeat_sec = PFheartbeat_sec},
-                     #'SDLWelcome'{version = NFversion, max_bidi_streams = NFmax_bidi_streams, max_packet_size = NFmax_packet_size, heartbeat_sec = NFheartbeat_sec}, _) ->
+merge_msg_SDLWelcome(#'SDLWelcome'{version = PFversion, max_bidi_streams = PFmax_bidi_streams, max_packet_size = PFmax_packet_size, heartbeat_sec = PFheartbeat_sec, ipv6_assist = PFipv6_assist},
+                     #'SDLWelcome'{version = NFversion, max_bidi_streams = NFmax_bidi_streams, max_packet_size = NFmax_packet_size, heartbeat_sec = NFheartbeat_sec, ipv6_assist = NFipv6_assist}, TrUserData) ->
     #'SDLWelcome'{version =
                       if NFversion =:= undefined -> PFversion;
                          true -> NFversion
@@ -3098,6 +3130,11 @@ merge_msg_SDLWelcome(#'SDLWelcome'{version = PFversion, max_bidi_streams = PFmax
                   heartbeat_sec =
                       if NFheartbeat_sec =:= undefined -> PFheartbeat_sec;
                          true -> NFheartbeat_sec
+                      end,
+                  ipv6_assist =
+                      if PFipv6_assist /= undefined, NFipv6_assist /= undefined -> merge_msg_SDLV6Info(PFipv6_assist, NFipv6_assist, TrUserData);
+                         PFipv6_assist == undefined -> NFipv6_assist;
+                         NFipv6_assist == undefined -> PFipv6_assist
                       end}.
 
 -compile({nowarn_unused_function,merge_msg_SDLRegisterSuper/3}).
@@ -3573,7 +3610,7 @@ v_msg_SDLV6Info(X, Path, _TrUserData) -> mk_type_error({expected_msg, 'SDLV6Info
 
 -compile({nowarn_unused_function,v_msg_SDLWelcome/3}).
 -dialyzer({nowarn_function,v_msg_SDLWelcome/3}).
-v_msg_SDLWelcome(#'SDLWelcome'{version = F1, max_bidi_streams = F2, max_packet_size = F3, heartbeat_sec = F4}, Path, TrUserData) ->
+v_msg_SDLWelcome(#'SDLWelcome'{version = F1, max_bidi_streams = F2, max_packet_size = F3, heartbeat_sec = F4, ipv6_assist = F5}, Path, TrUserData) ->
     if F1 == undefined -> ok;
        true -> v_type_uint32(F1, [version | Path], TrUserData)
     end,
@@ -3586,6 +3623,9 @@ v_msg_SDLWelcome(#'SDLWelcome'{version = F1, max_bidi_streams = F2, max_packet_s
     if F4 == undefined -> ok;
        true -> v_type_uint32(F4, [heartbeat_sec | Path], TrUserData)
     end,
+    if F5 == undefined -> ok;
+       true -> v_submsg_SDLV6Info(F5, [ipv6_assist | Path], TrUserData)
+    end,
     ok;
 v_msg_SDLWelcome(X, Path, _TrUserData) -> mk_type_error({expected_msg, 'SDLWelcome'}, X, Path).
 
@@ -4063,7 +4103,8 @@ get_msg_defs() ->
       [#field{name = version, fnum = 1, rnum = 2, type = uint32, occurrence = defaulty, opts = []},
        #field{name = max_bidi_streams, fnum = 2, rnum = 3, type = uint32, occurrence = defaulty, opts = []},
        #field{name = max_packet_size, fnum = 3, rnum = 4, type = uint32, occurrence = defaulty, opts = []},
-       #field{name = heartbeat_sec, fnum = 4, rnum = 5, type = uint32, occurrence = defaulty, opts = []}]},
+       #field{name = heartbeat_sec, fnum = 4, rnum = 5, type = uint32, occurrence = defaulty, opts = []},
+       #field{name = ipv6_assist, fnum = 5, rnum = 6, type = {msg, 'SDLV6Info'}, occurrence = defaulty, opts = []}]},
      {{msg, 'SDLRegisterSuper'},
       [#field{name = client_id, fnum = 1, rnum = 2, type = string, occurrence = defaulty, opts = []},
        #field{name = network_id, fnum = 2, rnum = 3, type = uint32, occurrence = defaulty, opts = []},
@@ -4247,7 +4288,8 @@ find_msg_def('SDLWelcome') ->
     [#field{name = version, fnum = 1, rnum = 2, type = uint32, occurrence = defaulty, opts = []},
      #field{name = max_bidi_streams, fnum = 2, rnum = 3, type = uint32, occurrence = defaulty, opts = []},
      #field{name = max_packet_size, fnum = 3, rnum = 4, type = uint32, occurrence = defaulty, opts = []},
-     #field{name = heartbeat_sec, fnum = 4, rnum = 5, type = uint32, occurrence = defaulty, opts = []}];
+     #field{name = heartbeat_sec, fnum = 4, rnum = 5, type = uint32, occurrence = defaulty, opts = []},
+     #field{name = ipv6_assist, fnum = 5, rnum = 6, type = {msg, 'SDLV6Info'}, occurrence = defaulty, opts = []}];
 find_msg_def('SDLRegisterSuper') ->
     [#field{name = client_id, fnum = 1, rnum = 2, type = string, occurrence = defaulty, opts = []},
      #field{name = network_id, fnum = 2, rnum = 3, type = uint32, occurrence = defaulty, opts = []},
diff --git a/src/sdlan_util.erl b/src/sdlan_util.erl
index dd75aa3..0d03cc8 100644
--- a/src/sdlan_util.erl
+++ b/src/sdlan_util.erl
@@ -14,7 +14,7 @@
 -export([json_data/1, json_error/2]).
 -export([is_broadcast_mac/1, is_multicast_mac/1]).
 -export([ipv4_to_int/1, int_to_ipv4/1, ips/2, format_ip/1]).
--export([ipv6_bytes_to_binary/1]).
+-export([ipv6_to_bytes/1, ipv6_bytes_to_binary/1]).
 -export([hmac/2]).
 
 -spec format_mac(Mac :: binary()) -> binary().
@@ -116,6 +116,21 @@ ips(NetAddr, MaskLen) when is_binary(NetAddr), is_integer(MaskLen) ->
     Net = (Net0 bsr L) bsl L,
     lists:map(fun(V) -> Net + V end, lists:seq(1, Mask - 1)).
 
+-spec ipv6_to_bytes(Address :: binary() | string() | inet:ip6_address()) -> binary().
+ipv6_to_bytes(Address) when is_binary(Address) ->
+    ipv6_to_bytes(binary_to_list(Address));
+ipv6_to_bytes({A, B, C, D, E, F, G, H}) ->
+    <<A:16, B:16, C:16, D:16, E:16, F:16, G:16, H:16>>;
+ipv6_to_bytes(Address) when is_list(Address) ->
+    case inet:parse_ipv6strict_address(string:trim(Address)) of
+        {ok, Ip6Address} ->
+            ipv6_to_bytes(Ip6Address);
+        {error, _} ->
+            <<"">>
+    end;
+ipv6_to_bytes(_) ->
+    <<"">>.
+
 -spec ipv6_bytes_to_binary(Bytes :: binary()) -> Bin :: binary().
 ipv6_bytes_to_binary(<<A:16, B:16, C:16, D:16, E:16, F:16, G:16, H:16>>) ->
     Segments = [integer_to_list(X, 16) || X <- [A, B, C, D, E, F, G, H]],
@@ -130,4 +145,4 @@ ipv6_bytes_to_binary(_) ->
 hmac(Key, Data) when is_binary(Key), is_binary(Data) ->
     Digest = crypto:mac(hmac, md5, Key, Data),
     %% 转成十六进制小写字符串，和 PHP hash_hmac 一致
-    lists:flatten([io_lib:format("~2.16.0b", [B]) || B <- binary:bin_to_list(Digest)]).
\ No newline at end of file
+    lists:flatten([io_lib:format("~2.16.0b", [B]) || B <- binary:bin_to_list(Digest)]).