Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
O
OpenXG-RAN
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Analytics
Analytics
CI / CD
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
常顺宇
OpenXG-RAN
Commits
9e8e9c8f
Commit
9e8e9c8f
authored
May 19, 2020
by
matzakos
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
noS1: Introduce NR DRB preconfiguration and PDCP RLC configuration triggering
parent
97d1f98f
Changes
3
Hide whitespace changes
Inline
Side-by-side
Showing
3 changed files
with
136 additions
and
99 deletions
+136
-99
openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.c
openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.c
+132
-96
openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c
openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c
+3
-2
openair2/RRC/NR/rrc_gNB_nsa.c
openair2/RRC/NR/rrc_gNB_nsa.c
+1
-1
No files found.
openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.c
View file @
9e8e9c8f
...
...
@@ -20,6 +20,10 @@
*/
#include "nr_pdcp_ue_manager.h"
#include "NR_RadioBearerConfig.h"
#include "NR_RLC-BearerConfig.h"
#include "NR_CellGroupConfig.h"
#include "openair2/RRC/NR/nr_rrc_proto.h"
/* from OAI */
#include "pdcp.h"
...
...
@@ -77,6 +81,13 @@ typedef struct {
static
rlc_data_req_queue
q
;
extern
rlc_op_status_t
nr_rrc_rlc_config_asn1_req
(
const
protocol_ctxt_t
*
const
ctxt_pP
,
const
NR_SRB_ToAddModList_t
*
const
srb2add_listP
,
const
NR_DRB_ToAddModList_t
*
const
drb2add_listP
,
const
NR_DRB_ToReleaseList_t
*
const
drb2release_listP
,
const
LTE_PMCH_InfoList_r9_t
*
const
pmch_InfoList_r9_pP
,
struct
NR_CellGroupConfig__rlc_BearerToAddModList
*
rlc_bearer2add_list
);
static
void
*
rlc_data_req_thread
(
void
*
_
)
{
int
i
;
...
...
@@ -170,102 +181,6 @@ static void enqueue_rlc_data_req(const protocol_ctxt_t *const ctxt_pP,
#include "LAYER2/MAC/mac_extern.h"
void
nr_ip_over_LTE_DRB_preconfiguration
(
void
)
{
// Addition for the use-case of 4G stack on top of 5G-NR.
// We need to configure pdcp and rlc instances without having an actual
// UE RRC Connection. In order to be able to test the NR PHY with some injected traffic
// on top of the LTE stack.
protocol_ctxt_t
ctxt
;
LTE_DRB_ToAddModList_t
*
DRB_configList
=
NULL
;
DRB_configList
=
CALLOC
(
1
,
sizeof
(
LTE_DRB_ToAddModList_t
));
struct
LTE_LogicalChannelConfig
*
DRB_lchan_config
=
NULL
;
struct
LTE_RLC_Config
*
DRB_rlc_config
=
NULL
;
struct
LTE_PDCP_Config
*
DRB_pdcp_config
=
NULL
;
struct
LTE_PDCP_Config__rlc_UM
*
PDCP_rlc_UM
=
NULL
;
struct
LTE_DRB_ToAddMod
*
DRB_config
=
NULL
;
struct
LTE_LogicalChannelConfig__ul_SpecificParameters
*
DRB_ul_SpecificParameters
=
NULL
;
long
*
logicalchannelgroup_drb
;
//Static preconfiguration of DRB
DRB_config
=
CALLOC
(
1
,
sizeof
(
*
DRB_config
));
DRB_config
->
eps_BearerIdentity
=
CALLOC
(
1
,
sizeof
(
long
));
// allowed value 5..15, value : x+4
*
(
DRB_config
->
eps_BearerIdentity
)
=
1
;
//ue_context_pP->ue_context.e_rab[i].param.e_rab_id;//+ 4; // especial case generation
// DRB_config->drb_Identity = 1 + drb_identity_index + e_rab_done;// + i ;// (DRB_Identity_t) ue_context_pP->ue_context.e_rab[i].param.e_rab_id;
// 1 + drb_identiy_index;
DRB_config
->
drb_Identity
=
1
;
DRB_config
->
logicalChannelIdentity
=
CALLOC
(
1
,
sizeof
(
long
));
*
(
DRB_config
->
logicalChannelIdentity
)
=
DRB_config
->
drb_Identity
+
2
;
//(long) (ue_context_pP->ue_context.e_rab[i].param.e_rab_id + 2); // value : x+2
DRB_rlc_config
=
CALLOC
(
1
,
sizeof
(
*
DRB_rlc_config
));
DRB_config
->
rlc_Config
=
DRB_rlc_config
;
DRB_pdcp_config
=
CALLOC
(
1
,
sizeof
(
*
DRB_pdcp_config
));
DRB_config
->
pdcp_Config
=
DRB_pdcp_config
;
DRB_pdcp_config
->
discardTimer
=
CALLOC
(
1
,
sizeof
(
long
));
*
DRB_pdcp_config
->
discardTimer
=
LTE_PDCP_Config__discardTimer_infinity
;
DRB_pdcp_config
->
rlc_AM
=
NULL
;
DRB_pdcp_config
->
rlc_UM
=
NULL
;
DRB_rlc_config
->
present
=
LTE_RLC_Config_PR_um_Bi_Directional
;
DRB_rlc_config
->
choice
.
um_Bi_Directional
.
ul_UM_RLC
.
sn_FieldLength
=
LTE_SN_FieldLength_size10
;
DRB_rlc_config
->
choice
.
um_Bi_Directional
.
dl_UM_RLC
.
sn_FieldLength
=
LTE_SN_FieldLength_size10
;
DRB_rlc_config
->
choice
.
um_Bi_Directional
.
dl_UM_RLC
.
t_Reordering
=
LTE_T_Reordering_ms35
;
// PDCP
PDCP_rlc_UM
=
CALLOC
(
1
,
sizeof
(
*
PDCP_rlc_UM
));
DRB_pdcp_config
->
rlc_UM
=
PDCP_rlc_UM
;
PDCP_rlc_UM
->
pdcp_SN_Size
=
LTE_PDCP_Config__rlc_UM__pdcp_SN_Size_len12bits
;
DRB_pdcp_config
->
headerCompression
.
present
=
LTE_PDCP_Config__headerCompression_PR_notUsed
;
DRB_lchan_config
=
CALLOC
(
1
,
sizeof
(
*
DRB_lchan_config
));
DRB_config
->
logicalChannelConfig
=
DRB_lchan_config
;
DRB_ul_SpecificParameters
=
CALLOC
(
1
,
sizeof
(
*
DRB_ul_SpecificParameters
));
DRB_lchan_config
->
ul_SpecificParameters
=
DRB_ul_SpecificParameters
;
DRB_ul_SpecificParameters
->
priority
=
4
;
DRB_ul_SpecificParameters
->
prioritisedBitRate
=
LTE_LogicalChannelConfig__ul_SpecificParameters__prioritisedBitRate_kBps8
;
//LogicalChannelConfig__ul_SpecificParameters__prioritisedBitRate_infinity;
DRB_ul_SpecificParameters
->
bucketSizeDuration
=
LTE_LogicalChannelConfig__ul_SpecificParameters__bucketSizeDuration_ms50
;
logicalchannelgroup_drb
=
CALLOC
(
1
,
sizeof
(
long
));
*
logicalchannelgroup_drb
=
1
;
//(i+1) % 3;
DRB_ul_SpecificParameters
->
logicalChannelGroup
=
logicalchannelgroup_drb
;
ASN_SEQUENCE_ADD
(
&
DRB_configList
->
list
,
DRB_config
);
if
(
ENB_NAS_USE_TUN
){
PROTOCOL_CTXT_SET_BY_MODULE_ID
(
&
ctxt
,
0
,
ENB_FLAG_YES
,
0x1234
,
0
,
0
,
0
);
}
else
{
PROTOCOL_CTXT_SET_BY_MODULE_ID
(
&
ctxt
,
0
,
ENB_FLAG_NO
,
0x1234
,
0
,
0
,
0
);
}
rrc_pdcp_config_asn1_req
(
&
ctxt
,
(
LTE_SRB_ToAddModList_t
*
)
NULL
,
DRB_configList
,
(
LTE_DRB_ToReleaseList_t
*
)
NULL
,
0xff
,
NULL
,
NULL
,
NULL
,
(
LTE_PMCH_InfoList_r9_t
*
)
NULL
,
&
DRB_config
->
drb_Identity
);
rrc_rlc_config_asn1_req
(
&
ctxt
,
(
LTE_SRB_ToAddModList_t
*
)
NULL
,
DRB_configList
,
(
LTE_DRB_ToReleaseList_t
*
)
NULL
//#if (RRC_VERSION >= MAKE_VERSION(10, 0, 0))
,(
LTE_PMCH_InfoList_r9_t
*
)
NULL
,
0
,
0
//#endif
);
}
static
void
reblock_tun_socket
(
void
)
{
extern
int
nas_sock_fd
[];
...
...
@@ -798,6 +713,127 @@ boolean_t rrc_pdcp_config_asn1_req(
return
0
;
}
void
nr_ip_over_LTE_DRB_preconfiguration
(
void
)
{
NR_RadioBearerConfig_t
*
rbconfig
=
NULL
;
struct
NR_CellGroupConfig__rlc_BearerToAddModList
*
Rlc_Bearer_ToAdd_list
=
NULL
;
protocol_ctxt_t
ctxt
;
//fill_default_rbconfig(rb_config, 5, 1);
rbconfig
=
calloc
(
1
,
sizeof
(
*
rbconfig
));
rbconfig
->
srb_ToAddModList
=
NULL
;
rbconfig
->
srb3_ToRelease
=
NULL
;
rbconfig
->
drb_ToAddModList
=
calloc
(
1
,
sizeof
(
*
rbconfig
->
drb_ToAddModList
));
NR_DRB_ToAddMod_t
*
drb_ToAddMod
=
calloc
(
1
,
sizeof
(
*
drb_ToAddMod
));
drb_ToAddMod
->
cnAssociation
=
calloc
(
1
,
sizeof
(
*
drb_ToAddMod
->
cnAssociation
));
drb_ToAddMod
->
cnAssociation
->
present
=
NR_DRB_ToAddMod__cnAssociation_PR_eps_BearerIdentity
;
drb_ToAddMod
->
cnAssociation
->
choice
.
eps_BearerIdentity
=
5
;
drb_ToAddMod
->
drb_Identity
=
1
;
drb_ToAddMod
->
reestablishPDCP
=
NULL
;
drb_ToAddMod
->
recoverPDCP
=
NULL
;
drb_ToAddMod
->
pdcp_Config
=
calloc
(
1
,
sizeof
(
*
drb_ToAddMod
->
pdcp_Config
));
drb_ToAddMod
->
pdcp_Config
->
drb
=
calloc
(
1
,
sizeof
(
*
drb_ToAddMod
->
pdcp_Config
->
drb
));
drb_ToAddMod
->
pdcp_Config
->
drb
->
discardTimer
=
calloc
(
1
,
sizeof
(
*
drb_ToAddMod
->
pdcp_Config
->
drb
->
discardTimer
));
*
drb_ToAddMod
->
pdcp_Config
->
drb
->
discardTimer
=
NR_PDCP_Config__drb__discardTimer_ms30
;
drb_ToAddMod
->
pdcp_Config
->
drb
->
pdcp_SN_SizeUL
=
calloc
(
1
,
sizeof
(
*
drb_ToAddMod
->
pdcp_Config
->
drb
->
pdcp_SN_SizeUL
));
*
drb_ToAddMod
->
pdcp_Config
->
drb
->
pdcp_SN_SizeUL
=
NR_PDCP_Config__drb__pdcp_SN_SizeUL_len18bits
;
drb_ToAddMod
->
pdcp_Config
->
drb
->
pdcp_SN_SizeDL
=
calloc
(
1
,
sizeof
(
*
drb_ToAddMod
->
pdcp_Config
->
drb
->
pdcp_SN_SizeDL
));
*
drb_ToAddMod
->
pdcp_Config
->
drb
->
pdcp_SN_SizeDL
=
NR_PDCP_Config__drb__pdcp_SN_SizeDL_len18bits
;
drb_ToAddMod
->
pdcp_Config
->
drb
->
headerCompression
.
present
=
NR_PDCP_Config__drb__headerCompression_PR_notUsed
;
drb_ToAddMod
->
pdcp_Config
->
drb
->
headerCompression
.
choice
.
notUsed
=
0
;
drb_ToAddMod
->
pdcp_Config
->
drb
->
integrityProtection
=
NULL
;
drb_ToAddMod
->
pdcp_Config
->
drb
->
statusReportRequired
=
NULL
;
drb_ToAddMod
->
pdcp_Config
->
drb
->
outOfOrderDelivery
=
NULL
;
drb_ToAddMod
->
pdcp_Config
->
moreThanOneRLC
=
NULL
;
drb_ToAddMod
->
pdcp_Config
->
t_Reordering
=
calloc
(
1
,
sizeof
(
*
drb_ToAddMod
->
pdcp_Config
->
t_Reordering
));
*
drb_ToAddMod
->
pdcp_Config
->
t_Reordering
=
NR_PDCP_Config__t_Reordering_ms0
;
drb_ToAddMod
->
pdcp_Config
->
ext1
=
NULL
;
ASN_SEQUENCE_ADD
(
&
rbconfig
->
drb_ToAddModList
->
list
,
drb_ToAddMod
);
rbconfig
->
drb_ToReleaseList
=
NULL
;
rbconfig
->
securityConfig
=
calloc
(
1
,
sizeof
(
*
rbconfig
->
securityConfig
));
rbconfig
->
securityConfig
->
securityAlgorithmConfig
=
calloc
(
1
,
sizeof
(
*
rbconfig
->
securityConfig
->
securityAlgorithmConfig
));
rbconfig
->
securityConfig
->
securityAlgorithmConfig
->
cipheringAlgorithm
=
NR_CipheringAlgorithm_nea0
;
rbconfig
->
securityConfig
->
securityAlgorithmConfig
->
integrityProtAlgorithm
=
NULL
;
rbconfig
->
securityConfig
->
keyToUse
=
calloc
(
1
,
sizeof
(
*
rbconfig
->
securityConfig
->
keyToUse
));
*
rbconfig
->
securityConfig
->
keyToUse
=
NR_SecurityConfig__keyToUse_master
;
xer_fprint
(
stdout
,
&
asn_DEF_NR_RadioBearerConfig
,
(
const
void
*
)
rbconfig
);
NR_RLC_BearerConfig_t
*
RLC_BearerConfig
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
));
RLC_BearerConfig
->
logicalChannelIdentity
=
3
;
RLC_BearerConfig
->
servedRadioBearer
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
->
servedRadioBearer
));
RLC_BearerConfig
->
servedRadioBearer
->
present
=
NR_RLC_BearerConfig__servedRadioBearer_PR_drb_Identity
;
RLC_BearerConfig
->
servedRadioBearer
->
choice
.
drb_Identity
=
1
;
RLC_BearerConfig
->
reestablishRLC
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
->
reestablishRLC
));
*
RLC_BearerConfig
->
reestablishRLC
=
NR_RLC_BearerConfig__reestablishRLC_true
;
RLC_BearerConfig
->
rlc_Config
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
->
rlc_Config
));
// RLC UM Bi-directional Bearer configuration
RLC_BearerConfig
->
rlc_Config
->
present
=
NR_RLC_Config_PR_um_Bi_Directional
;
RLC_BearerConfig
->
rlc_Config
->
choice
.
um_Bi_Directional
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
->
rlc_Config
->
choice
.
um_Bi_Directional
));
RLC_BearerConfig
->
rlc_Config
->
choice
.
um_Bi_Directional
->
ul_UM_RLC
.
sn_FieldLength
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
->
rlc_Config
->
choice
.
um_Bi_Directional
->
ul_UM_RLC
.
sn_FieldLength
));
*
RLC_BearerConfig
->
rlc_Config
->
choice
.
um_Bi_Directional
->
ul_UM_RLC
.
sn_FieldLength
=
NR_SN_FieldLengthUM_size12
;
RLC_BearerConfig
->
rlc_Config
->
choice
.
um_Bi_Directional
->
dl_UM_RLC
.
sn_FieldLength
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
->
rlc_Config
->
choice
.
um_Bi_Directional
->
dl_UM_RLC
.
sn_FieldLength
));
*
RLC_BearerConfig
->
rlc_Config
->
choice
.
um_Bi_Directional
->
dl_UM_RLC
.
sn_FieldLength
=
NR_SN_FieldLengthUM_size12
;
RLC_BearerConfig
->
rlc_Config
->
choice
.
um_Bi_Directional
->
dl_UM_RLC
.
t_Reassembly
=
NR_T_Reassembly_ms15
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
->
mac_LogicalChannelConfig
));
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
));
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
priority
=
1
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
prioritisedBitRate
=
NR_LogicalChannelConfig__ul_SpecificParameters__prioritisedBitRate_infinity
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
bucketSizeDuration
=
NR_LogicalChannelConfig__ul_SpecificParameters__bucketSizeDuration_ms50
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
allowedServingCells
=
NULL
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
allowedSCS_List
=
NULL
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
maxPUSCH_Duration
=
NULL
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
configuredGrantType1Allowed
=
NULL
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
logicalChannelGroup
=
calloc
(
1
,
sizeof
(
*
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
logicalChannelGroup
));
*
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
logicalChannelGroup
=
1
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
schedulingRequestID
=
NULL
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
logicalChannelSR_Mask
=
false
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
logicalChannelSR_DelayTimerApplied
=
false
;
RLC_BearerConfig
->
mac_LogicalChannelConfig
->
ul_SpecificParameters
->
bitRateQueryProhibitTimer
=
NULL
;
Rlc_Bearer_ToAdd_list
=
calloc
(
1
,
sizeof
(
*
Rlc_Bearer_ToAdd_list
));
ASN_SEQUENCE_ADD
(
&
Rlc_Bearer_ToAdd_list
->
list
,
RLC_BearerConfig
);
if
(
ENB_NAS_USE_TUN
){
PROTOCOL_CTXT_SET_BY_MODULE_ID
(
&
ctxt
,
0
,
ENB_FLAG_YES
,
0x1234
,
0
,
0
,
0
);
}
else
{
PROTOCOL_CTXT_SET_BY_MODULE_ID
(
&
ctxt
,
0
,
ENB_FLAG_NO
,
0x1234
,
0
,
0
,
0
);
}
nr_rrc_pdcp_config_asn1_req
(
&
ctxt
,
(
NR_SRB_ToAddModList_t
*
)
NULL
,
rbconfig
->
drb_ToAddModList
,
rbconfig
->
drb_ToReleaseList
,
0xff
,
NULL
,
NULL
,
NULL
,
NULL
,
NULL
,
Rlc_Bearer_ToAdd_list
);
nr_rrc_rlc_config_asn1_req
(
&
ctxt
,
(
NR_SRB_ToAddModList_t
*
)
NULL
,
rbconfig
->
drb_ToAddModList
,
rbconfig
->
drb_ToReleaseList
,
(
LTE_PMCH_InfoList_r9_t
*
)
NULL
,
Rlc_Bearer_ToAdd_list
);
}
uint64_t
get_pdcp_optmask
(
void
)
{
return
pdcp_optmask
;
...
...
openair2/LAYER2/nr_rlc/nr_rlc_oai_api.c
View file @
9e8e9c8f
...
...
@@ -873,7 +873,8 @@ rlc_op_status_t nr_rrc_rlc_config_asn1_req (const protocol_ctxt_t * const ctxt
const
NR_DRB_ToAddModList_t
*
const
drb2add_listP
,
const
NR_DRB_ToReleaseList_t
*
const
drb2release_listP
,
const
LTE_PMCH_InfoList_r9_t
*
const
pmch_InfoList_r9_pP
,
NR_CellGroupConfig_t
*
SCell_GroupConfig
)
struct
NR_CellGroupConfig__rlc_BearerToAddModList
*
rlc_bearer2add_list
)
//NR_CellGroupConfig_t *SCell_GroupConfig)
{
int
rnti
=
ctxt_pP
->
rnti
;
int
i
;
...
...
@@ -905,7 +906,7 @@ rlc_op_status_t nr_rrc_rlc_config_asn1_req (const protocol_ctxt_t * const ctxt
if
(
drb2add_listP
!=
NULL
)
{
for
(
i
=
0
;
i
<
drb2add_listP
->
list
.
count
;
i
++
)
{
add_drb
(
rnti
,
drb2add_listP
->
list
.
array
[
i
],
SCell_GroupConfig
->
rlc_BearerToAddModL
ist
->
list
.
array
[
i
]);
add_drb
(
rnti
,
drb2add_listP
->
list
.
array
[
i
],
rlc_bearer2add_l
ist
->
list
.
array
[
i
]);
}
}
...
...
openair2/RRC/NR/rrc_gNB_nsa.c
View file @
9e8e9c8f
...
...
@@ -279,7 +279,7 @@ void rrc_add_nsa_user(gNB_RRC_INST *rrc,struct rrc_gNB_ue_context_s *ue_context_
ue_context_p
->
ue_context
.
rb_config
->
drb_ToAddModList
,
ue_context_p
->
ue_context
.
rb_config
->
drb_ToReleaseList
,
(
LTE_PMCH_InfoList_r9_t
*
)
NULL
,
ue_context_p
->
ue_context
.
secondaryCellGroup
);
ue_context_p
->
ue_context
.
secondaryCellGroup
->
rlc_BearerToAddModList
);
}
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment