pespin has uploaded this change for review. (
https://gerrit.osmocom.org/c/erlang/osmo-epdg/+/35956?usp=email )
Change subject: Delete PDP Context when moving out of active state
......................................................................
Delete PDP Context when moving out of active state
Change-Id: I95602da4d5441ee97daad9213e84f3d9671efa09
---
M include/conv.hrl
M src/epdg_ue_fsm.erl
M src/gtp_u_tun.erl
3 files changed, 53 insertions(+), 16 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/erlang/osmo-epdg
refs/changes/56/35956/1
diff --git a/include/conv.hrl b/include/conv.hrl
index 1284d3b..a3e147d 100644
--- a/include/conv.hrl
+++ b/include/conv.hrl
@@ -37,3 +37,9 @@
ipv6 :: binary()
}).
+-record(epdg_tun_pdp_ctx, {
+ local_teid :: non_neg_integer(),
+ remote_teid :: non_neg_integer(),
+ eua :: epdg_eua,
+ peer_addr :: binary()
+}).
\ No newline at end of file
diff --git a/src/epdg_ue_fsm.erl b/src/epdg_ue_fsm.erl
index 5594dff..188d461 100644
--- a/src/epdg_ue_fsm.erl
+++ b/src/epdg_ue_fsm.erl
@@ -36,6 +36,7 @@
-include_lib("osmo_gsup/include/gsup_protocol.hrl").
-include_lib("gtplib/include/gtp_packet.hrl").
+-include("conv.hrl").
-export([start_link/1, stop/1]).
-export([init/1,callback_mode/0,terminate/3]).
@@ -50,6 +51,7 @@
-record(ue_fsm_data, {
imsi,
apn = "internet" :: string(),
+ tun_pdp_ctx :: epdg_tun_pdp_ctx,
tear_down_gsup_needed = false :: boolean(), %% need to send GSUP
PurgeMSResp after STR+STA?
tear_down_gsup_cause = 0 :: integer()
}).
@@ -179,6 +181,10 @@
terminate(Reason, State, Data) ->
lager:info("terminating ~p with reason ~p state=~p, ~p~n", [?MODULE,
Reason, State, Data]),
+ case Data#ue_fsm_data.tun_pdp_ctx of
+ undefined -> ok;
+ _ -> gtp_u_tun:delete_pdp_context(Data#ue_fsm_data.tun_pdp_ctx)
+ end,
ok.
state_new(enter, _OldState, Data) ->
@@ -278,12 +284,15 @@
remote_teid := RemoteTEID,
remote_ipv4 := RemoteIPv4 % TODO: remote_ipv6
} = ResInfo,
- Ret = gtp_u_tun:create_pdp_context(RemoteIPv4, EUA, LocalTEID,
RemoteTEID),
- lager:debug("gtp_u_tun:create_pdp_context(~p) returned ~p~n",
[ResInfo, Ret]);
- _ -> ok
+ TunPdpCtx = #epdg_tun_pdp_ctx{local_teid = LocalTEID,
remote_teid = RemoteTEID,
+ eua = EUA, peer_addr =
RemoteIPv4},
+ Ret = gtp_u_tun:create_pdp_context(TunPdpCtx),
+ lager:debug("gtp_u_tun:create_pdp_context(~p) returned ~p~n",
[ResInfo, Ret]),
+ Data1 = Data#ue_fsm_data{tun_pdp_ctx = TunPdpCtx};
+ _ -> Data1 = Data
end,
- gsup_server:tunnel_response(Data#ue_fsm_data.imsi, Result),
- {next_state, state_active, Data, [{reply,From,ok}]};
+ gsup_server:tunnel_response(Data1#ue_fsm_data.imsi, Result),
+ {next_state, state_active, Data1, [{reply,From,ok}]};
state_wait_create_session_resp({call, From}, Event, Data) ->
lager:error("ue_fsm state_wait_delete_session_resp: Unexpected call
event ~p, ~p~n", [Event, Data]),
@@ -299,19 +308,24 @@
state_active({call, _From}, {auth_request, PdpTypeNr, Apn}, Data) ->
lager:info("ue_fsm state_active event=auth_request {~p, ~p}, ~p~n",
[PdpTypeNr, Apn, Data]),
- {next_state, state_new, Data, [postpone]};
+ gtp_u_tun:delete_pdp_context(Data#ue_fsm_data.tun_pdp_ctx),
+ Data1 = Data#ue_fsm_data{tun_pdp_ctx = undefined},
+ {next_state, state_new, Data1, [postpone]};
state_active({call, From}, purge_ms_request, Data) ->
lager:info("ue_fsm state_active event=purge_ms_request, ~p~n", [Data]),
- case epdg_gtpc_s2b:delete_session_req(Data#ue_fsm_data.imsi) of
- ok -> {next_state, state_wait_delete_session_resp, Data,
[{reply,From,ok}]};
- {error, Err} -> {keep_state, Data, [{reply,From,{error, Err}}]}
+ gtp_u_tun:delete_pdp_context(Data#ue_fsm_data.tun_pdp_ctx),
+ Data1 = Data#ue_fsm_data{tun_pdp_ctx = undefined},
+ case epdg_gtpc_s2b:delete_session_req(Data1#ue_fsm_data.imsi) of
+ ok -> {next_state, state_wait_delete_session_resp, Data1,
[{reply,From,ok}]};
+ {error, Err} -> {keep_state, Data1, [{reply,From,{error, Err}}]}
end;
state_active({call, From}, received_gtpc_delete_bearer_request, Data) ->
lager:info("ue_fsm state_active
event=received_gtpc_delete_bearer_request, ~p~n", [Data]),
+ gtp_u_tun:delete_pdp_context(Data#ue_fsm_data.tun_pdp_ctx),
gsup_server:cancel_location_request(Data#ue_fsm_data.imsi),
- Data1 = Data#ue_fsm_data{tear_down_gsup_needed = false},
+ Data1 = Data#ue_fsm_data{tun_pdp_ctx = undefined,
tear_down_gsup_needed = false},
{next_state, state_wait_swm_session_termination_answer, Data1,
[{reply,From,ok}]};
state_active({call, From}, _Whatever, Data) ->
diff --git a/src/gtp_u_tun.erl b/src/gtp_u_tun.erl
index d73eaad..19049f6 100644
--- a/src/gtp_u_tun.erl
+++ b/src/gtp_u_tun.erl
@@ -36,7 +36,7 @@
-author('Pau Espin Pedrol <[email protected]>').
-include("conv.hrl").
--export([create_pdp_context/4]).
+-export([create_pdp_context/1, delete_pdp_context/1]).
%%%%%%%%%%%%%%%%%%%%%%
%%% Internal API
@@ -57,12 +57,20 @@
%%%%%%%%%%%%%%%%%%%%%%
% Create a PDP Context on the GTP tundev
-create_pdp_context(PeerAddr, EUA, LocalTEID, RemoteTEID) ->
- %SGSNaddr = {127,0,0,1}, % TODO: This should be set to the GTP-U IP
address provided by the PGW
- %EUA = {127,0,0,1}, % TODO: This should be set to the EUA IP address
provided by the PGW
- %LocalTEID = 1234, % TODO: this should be set to our locally generated
TEID.
- %RemoteTEID = 56768, % TODO: this should be set to TEID obtained from
CreateSessionResponse
+create_pdp_context(#epdg_tun_pdp_ctx{local_teid = LocalTEID,
+ remote_teid = RemoteTEID,
+ eua = EUA,
+ peer_addr = PeerAddr}) ->
PeerIP = conv:bin_to_ip(PeerAddr), % TODO: IPv6
UEIP = conv:bin_to_ip(EUA#epdg_eua.ipv4), % TODO: IPv6.
ServRef = get_env_gtp_u_kmod_server_ref(),
gen_server:call(ServRef, {create_pdp_context, PeerIP, LocalTEID,
RemoteTEID, UEIP}).
+
+delete_pdp_context(#epdg_tun_pdp_ctx{local_teid = LocalTEID,
+ remote_teid = RemoteTEID,
+ eua = EUA,
+ peer_addr = PeerAddr}) ->
+ PeerIP = conv:bin_to_ip(PeerAddr), % TODO: IPv6
+ UEIP = conv:bin_to_ip(EUA#epdg_eua.ipv4), % TODO: IPv6.
+ ServRef = get_env_gtp_u_kmod_server_ref(),
+ gen_server:call(ServRef, {delete_pdp_context, PeerIP, LocalTEID,
RemoteTEID, UEIP}).
--
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Gerrit-Project: erlang/osmo-epdg
Gerrit-Branch: master
Gerrit-Change-Id: I95602da4d5441ee97daad9213e84f3d9671efa09
Gerrit-Change-Number: 35956
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <[email protected]>
Gerrit-MessageType: newchange
