2017-04-06 11:10:00 +00:00
|
|
|
#define TRACE_MODULE _mme_context
|
2017-03-04 15:54:15 +00:00
|
|
|
|
2017-02-06 06:30:12 +00:00
|
|
|
#include "core_debug.h"
|
|
|
|
#include "core_pool.h"
|
|
|
|
|
2017-03-23 14:15:55 +00:00
|
|
|
#include "gtp_path.h"
|
2017-03-26 06:34:34 +00:00
|
|
|
#include "s1ap_message.h"
|
|
|
|
|
2017-04-06 10:20:33 +00:00
|
|
|
#include "mme_context.h"
|
2017-02-06 06:30:12 +00:00
|
|
|
|
2017-04-04 05:00:02 +00:00
|
|
|
#define MAX_CELL_PER_ENB 8
|
2017-03-05 04:03:11 +00:00
|
|
|
|
2017-04-04 05:00:02 +00:00
|
|
|
#define MAX_NUM_OF_SGW 8
|
2017-04-12 04:45:57 +00:00
|
|
|
|
2017-03-23 14:05:40 +00:00
|
|
|
#define S1AP_SCTP_PORT 36412
|
2017-03-04 14:48:04 +00:00
|
|
|
|
2017-04-11 14:55:21 +00:00
|
|
|
#define MIN_EPS_BEARER_ID 5
|
|
|
|
#define MAX_EPS_BEARER_ID 15
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
static mme_context_t self;
|
2017-02-06 06:30:12 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
pool_declare(mme_sgw_pool, mme_sgw_t, MAX_NUM_OF_SGW);
|
2017-04-10 14:59:59 +00:00
|
|
|
|
2017-04-11 00:19:33 +00:00
|
|
|
index_declare(mme_enb_pool, mme_enb_t, MAX_NUM_OF_ENB);
|
2017-04-10 14:59:59 +00:00
|
|
|
index_declare(mme_ue_pool, mme_ue_t, MAX_NUM_OF_UE);
|
2017-04-27 14:06:10 +00:00
|
|
|
index_declare(mme_sess_pool, mme_sess_t, MAX_NUM_OF_UE);
|
2017-04-13 10:15:53 +00:00
|
|
|
index_declare(mme_bearer_pool, mme_bearer_t, MAX_NUM_OF_UE_BEARER);
|
2017-04-12 04:45:57 +00:00
|
|
|
pool_declare(mme_pdn_pool, pdn_t, MAX_NUM_OF_UE_PDN);
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
static int context_initialized = 0;
|
2017-02-06 06:30:12 +00:00
|
|
|
|
2017-04-18 09:24:37 +00:00
|
|
|
/* FIXME : Global IP information and port.
|
|
|
|
* This should be read from configuration file or arguments
|
|
|
|
*/
|
|
|
|
static char g_mme_ip_addr[20] = "10.1.35.215";
|
|
|
|
static unsigned int g_mme_gtp_c_port = GTPV2_C_UDP_PORT;
|
|
|
|
|
|
|
|
static char g_sgw_s11_ip_addr[20] = "10.1.35.216";
|
|
|
|
static unsigned int g_sgw_s11_port = GTPV2_C_UDP_PORT;
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
status_t mme_context_init()
|
2017-02-06 06:30:12 +00:00
|
|
|
{
|
2017-04-18 09:24:37 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
d_assert(context_initialized == 0, return CORE_ERROR,
|
|
|
|
"MME context already has been context_initialized");
|
2017-02-06 06:30:12 +00:00
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
/* Initialize MME context */
|
|
|
|
memset(&self, 0, sizeof(mme_context_t));
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
pool_init(&mme_sgw_pool, MAX_NUM_OF_SGW);
|
2017-04-12 01:05:23 +00:00
|
|
|
list_init(&self.sgw_list);
|
|
|
|
|
2017-04-11 00:19:33 +00:00
|
|
|
index_init(&mme_enb_pool, MAX_NUM_OF_ENB);
|
2017-04-12 01:05:23 +00:00
|
|
|
list_init(&self.enb_list);
|
|
|
|
|
2017-04-10 14:59:59 +00:00
|
|
|
index_init(&mme_ue_pool, MAX_NUM_OF_UE);
|
2017-04-27 14:06:10 +00:00
|
|
|
index_init(&mme_sess_pool, MAX_NUM_OF_UE);
|
2017-04-13 10:15:53 +00:00
|
|
|
index_init(&mme_bearer_pool, MAX_NUM_OF_UE_BEARER);
|
2017-04-12 04:45:57 +00:00
|
|
|
pool_init(&mme_pdn_pool, MAX_NUM_OF_UE_PDN);
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-18 09:24:37 +00:00
|
|
|
self.mme_addr = inet_addr(g_mme_ip_addr);
|
2017-04-12 12:20:00 +00:00
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
self.mme_ue_s1ap_id_hash = hash_make();
|
2017-02-06 06:30:12 +00:00
|
|
|
|
2017-04-12 12:20:00 +00:00
|
|
|
self.s1ap_addr = self.mme_addr;
|
2017-03-24 09:47:05 +00:00
|
|
|
self.s1ap_port = S1AP_SCTP_PORT;
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_t *sgw = mme_sgw_add();
|
2017-03-27 04:22:42 +00:00
|
|
|
d_assert(sgw, return CORE_ERROR, "Can't add SGW context");
|
|
|
|
|
2017-04-12 12:20:00 +00:00
|
|
|
self.s11_addr = self.mme_addr;
|
2017-04-18 09:24:37 +00:00
|
|
|
self.s11_port = g_mme_gtp_c_port;
|
2017-03-28 07:35:57 +00:00
|
|
|
|
2017-04-18 09:24:37 +00:00
|
|
|
/* FIXME : It should be removed : Peer SGW ?*/
|
|
|
|
sgw->gnode.addr = inet_addr(g_sgw_s11_ip_addr);
|
|
|
|
sgw->gnode.port = g_sgw_s11_port;
|
2017-03-27 04:22:42 +00:00
|
|
|
|
2017-03-24 13:52:55 +00:00
|
|
|
/* MCC : 001, MNC : 01 */
|
|
|
|
plmn_id_build(&self.plmn_id, 1, 1, 2);
|
2017-02-14 00:09:01 +00:00
|
|
|
self.tracking_area_code = 12345;
|
|
|
|
self.default_paging_drx = S1ap_PagingDRX_v64;
|
2017-02-06 10:12:10 +00:00
|
|
|
self.relative_capacity = 0xff;
|
2017-02-06 06:30:12 +00:00
|
|
|
|
2017-02-06 10:12:10 +00:00
|
|
|
self.srvd_gummei.num_of_plmn_id = 1;
|
2017-03-24 13:52:55 +00:00
|
|
|
/* MCC : 001, MNC : 01 */
|
|
|
|
plmn_id_build(&self.srvd_gummei.plmn_id[0], 1, 1, 2);
|
2017-02-06 06:30:12 +00:00
|
|
|
|
2017-02-13 05:41:20 +00:00
|
|
|
self.srvd_gummei.num_of_mme_gid = 1;
|
|
|
|
self.srvd_gummei.mme_gid[0] = 2;
|
|
|
|
self.srvd_gummei.num_of_mme_code = 1;
|
|
|
|
self.srvd_gummei.mme_code[0] = 1;
|
2017-02-06 06:30:12 +00:00
|
|
|
|
2017-03-07 05:47:17 +00:00
|
|
|
self.selected_enc_algorithm = NAS_SECURITY_ALGORITHMS_EEA0;
|
2017-03-07 00:30:12 +00:00
|
|
|
self.selected_int_algorithm = NAS_SECURITY_ALGORITHMS_128_EIA1;
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
context_initialized = 1;
|
2017-02-06 06:30:12 +00:00
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
status_t mme_context_final()
|
2017-02-06 06:30:12 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
d_assert(context_initialized == 1, return CORE_ERROR,
|
2017-02-06 06:30:12 +00:00
|
|
|
"HyperCell context already has been finalized");
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_remove_all();
|
|
|
|
mme_enb_remove_all();
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
d_assert(self.mme_ue_s1ap_id_hash, , "Null param");
|
|
|
|
hash_destroy(self.mme_ue_s1ap_id_hash);
|
|
|
|
|
2017-04-12 04:45:57 +00:00
|
|
|
pool_final(&mme_pdn_pool);
|
2017-04-13 10:15:53 +00:00
|
|
|
index_final(&mme_bearer_pool);
|
2017-04-27 14:06:10 +00:00
|
|
|
index_final(&mme_sess_pool);
|
2017-04-11 00:19:33 +00:00
|
|
|
index_final(&mme_ue_pool);
|
2017-04-10 14:59:59 +00:00
|
|
|
|
2017-04-12 04:45:57 +00:00
|
|
|
index_final(&mme_enb_pool);
|
2017-04-10 14:59:59 +00:00
|
|
|
pool_final(&mme_sgw_pool);
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
context_initialized = 0;
|
2017-02-06 06:30:12 +00:00
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_context_t* mme_self()
|
2017-02-06 06:30:12 +00:00
|
|
|
{
|
|
|
|
return &self;
|
|
|
|
}
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_t* mme_sgw_add()
|
2017-03-26 15:48:33 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_t *sgw = NULL;
|
2017-03-26 15:48:33 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
pool_alloc_node(&mme_sgw_pool, &sgw);
|
2017-03-26 15:48:33 +00:00
|
|
|
d_assert(sgw, return NULL, "Null param");
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
memset(sgw, 0, sizeof(mme_sgw_t));
|
2017-03-26 15:48:33 +00:00
|
|
|
|
2017-04-03 06:31:57 +00:00
|
|
|
list_init(&sgw->gnode.local_list);
|
|
|
|
list_init(&sgw->gnode.remote_list);
|
2017-03-30 12:17:05 +00:00
|
|
|
|
2017-04-06 11:58:13 +00:00
|
|
|
list_append(&self.sgw_list, sgw);
|
2017-03-26 15:48:33 +00:00
|
|
|
|
|
|
|
return sgw;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
status_t mme_sgw_remove(mme_sgw_t *sgw)
|
2017-03-26 15:48:33 +00:00
|
|
|
{
|
|
|
|
d_assert(sgw, return CORE_ERROR, "Null param");
|
|
|
|
|
2017-04-11 13:44:57 +00:00
|
|
|
gtp_xact_delete_all(&sgw->gnode);
|
|
|
|
|
2017-04-06 11:58:13 +00:00
|
|
|
list_remove(&self.sgw_list, sgw);
|
2017-04-06 11:10:00 +00:00
|
|
|
pool_free_node(&mme_sgw_pool, sgw);
|
2017-03-26 15:48:33 +00:00
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
status_t mme_sgw_remove_all()
|
2017-03-26 15:48:33 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_t *sgw = NULL, *next_sgw = NULL;
|
2017-03-26 15:48:33 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
sgw = mme_sgw_first();
|
2017-03-26 15:48:33 +00:00
|
|
|
while (sgw)
|
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
next_sgw = mme_sgw_next(sgw);
|
2017-03-26 15:48:33 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_remove(sgw);
|
2017-03-26 15:48:33 +00:00
|
|
|
|
|
|
|
sgw = next_sgw;
|
|
|
|
}
|
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_t* mme_sgw_find_by_node(gtp_node_t *gnode)
|
2017-03-26 15:48:33 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_t *sgw = NULL;
|
2017-03-26 15:48:33 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
sgw = mme_sgw_first();
|
2017-03-26 15:48:33 +00:00
|
|
|
while (sgw)
|
|
|
|
{
|
2017-03-27 04:22:42 +00:00
|
|
|
if (GTP_COMPARE_NODE(&sgw->gnode, gnode))
|
2017-03-26 15:48:33 +00:00
|
|
|
break;
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
sgw = mme_sgw_next(sgw);
|
2017-03-26 15:48:33 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return sgw;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_t* mme_sgw_first()
|
2017-03-26 15:48:33 +00:00
|
|
|
{
|
2017-04-06 11:58:13 +00:00
|
|
|
return list_first(&self.sgw_list);
|
2017-03-26 15:48:33 +00:00
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_sgw_t* mme_sgw_next(mme_sgw_t *sgw)
|
2017-03-26 15:48:33 +00:00
|
|
|
{
|
|
|
|
return list_next(sgw);
|
|
|
|
}
|
|
|
|
|
2017-04-08 01:45:48 +00:00
|
|
|
mme_enb_t* mme_enb_add(net_sock_t *s1ap_sock)
|
2017-02-13 04:19:53 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_enb_t *enb = NULL;
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-11 00:19:33 +00:00
|
|
|
index_alloc(&mme_enb_pool, &enb);
|
2017-03-05 04:03:11 +00:00
|
|
|
d_assert(enb, return NULL, "Null param");
|
2017-04-11 00:19:33 +00:00
|
|
|
|
|
|
|
/* IMPORTANT!
|
|
|
|
* eNB Index is saved in net_sock_t structure */
|
|
|
|
s1ap_sock->app_index = enb->index;
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-08 01:45:48 +00:00
|
|
|
enb->s1ap_sock = s1ap_sock;
|
2017-04-08 02:38:09 +00:00
|
|
|
list_init(&enb->ue_list);
|
|
|
|
list_append(&self.enb_list, enb);
|
2017-04-08 01:45:48 +00:00
|
|
|
|
2017-04-11 00:32:34 +00:00
|
|
|
fsm_create(&enb->sm, s1ap_state_initial, s1ap_state_final);
|
|
|
|
fsm_init(&enb->sm, 0);
|
2017-02-13 04:19:53 +00:00
|
|
|
|
|
|
|
return enb;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
status_t mme_enb_remove(mme_enb_t *enb)
|
2017-02-13 04:19:53 +00:00
|
|
|
{
|
|
|
|
d_assert(enb, return CORE_ERROR, "Null param");
|
|
|
|
|
2017-04-11 00:32:34 +00:00
|
|
|
fsm_final(&enb->sm, 0);
|
|
|
|
fsm_clear(&enb->sm);
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-08 02:38:09 +00:00
|
|
|
mme_ue_remove_in_enb(enb);
|
|
|
|
|
2017-04-08 01:18:48 +00:00
|
|
|
net_unregister_sock(enb->s1ap_sock);
|
|
|
|
net_close(enb->s1ap_sock);
|
|
|
|
|
2017-04-06 11:58:13 +00:00
|
|
|
list_remove(&self.enb_list, enb);
|
2017-04-11 00:19:33 +00:00
|
|
|
index_free(&mme_enb_pool, enb);
|
2017-02-13 04:19:53 +00:00
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
status_t mme_enb_remove_all()
|
2017-02-13 04:19:53 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_enb_t *enb = NULL, *next_enb = NULL;
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
enb = mme_enb_first();
|
2017-02-13 04:19:53 +00:00
|
|
|
while (enb)
|
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
next_enb = mme_enb_next(enb);
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_enb_remove(enb);
|
2017-02-13 04:19:53 +00:00
|
|
|
|
|
|
|
enb = next_enb;
|
|
|
|
}
|
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-11 00:19:33 +00:00
|
|
|
mme_enb_t* mme_enb_find(index_t index)
|
|
|
|
{
|
|
|
|
d_assert(index, return NULL, "Invalid Index");
|
|
|
|
return index_find(&mme_enb_pool, index);
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_enb_t* mme_enb_find_by_sock(net_sock_t *sock)
|
2017-02-13 04:19:53 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_enb_t *enb = NULL;
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
enb = mme_enb_first();
|
2017-02-13 04:19:53 +00:00
|
|
|
while (enb)
|
|
|
|
{
|
2017-03-05 04:03:11 +00:00
|
|
|
if (sock == enb->s1ap_sock)
|
2017-02-13 04:19:53 +00:00
|
|
|
break;
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
enb = mme_enb_next(enb);
|
2017-02-13 04:19:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return enb;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_enb_t* mme_enb_find_by_enb_id(c_uint32_t enb_id)
|
2017-02-13 04:19:53 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_enb_t *enb = NULL;
|
2017-02-13 04:19:53 +00:00
|
|
|
|
2017-04-06 11:58:13 +00:00
|
|
|
enb = list_first(&self.enb_list);
|
2017-02-13 04:19:53 +00:00
|
|
|
while (enb)
|
|
|
|
{
|
2017-03-05 04:03:11 +00:00
|
|
|
if (enb_id == enb->enb_id)
|
2017-02-13 04:19:53 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
enb = list_next(enb);
|
|
|
|
}
|
|
|
|
|
|
|
|
return enb;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_enb_t* mme_enb_first()
|
2017-02-13 04:19:53 +00:00
|
|
|
{
|
2017-04-06 11:58:13 +00:00
|
|
|
return list_first(&self.enb_list);
|
2017-02-13 04:19:53 +00:00
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_enb_t* mme_enb_next(mme_enb_t *enb)
|
2017-02-13 04:19:53 +00:00
|
|
|
{
|
|
|
|
return list_next(enb);
|
|
|
|
}
|
2017-03-05 04:03:11 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_ue_t* mme_ue_add(mme_enb_t *enb)
|
2017-03-05 04:03:11 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_ue_t *ue = NULL;
|
2017-03-05 04:03:11 +00:00
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
d_assert(self.mme_ue_s1ap_id_hash, return NULL, "Null param");
|
2017-03-05 04:03:11 +00:00
|
|
|
d_assert(enb, return NULL, "Null param");
|
|
|
|
|
2017-04-10 14:59:59 +00:00
|
|
|
index_alloc(&mme_ue_pool, &ue);
|
2017-03-05 04:03:11 +00:00
|
|
|
d_assert(ue, return NULL, "Null param");
|
|
|
|
|
2017-04-11 14:55:21 +00:00
|
|
|
ue->mme_ue_s1ap_id = NEXT_ID(self.mme_ue_s1ap_id, 1, 0xffffffff);
|
2017-04-06 12:44:30 +00:00
|
|
|
hash_set(self.mme_ue_s1ap_id_hash, &ue->mme_ue_s1ap_id,
|
|
|
|
sizeof(ue->mme_ue_s1ap_id), ue);
|
2017-03-08 10:10:01 +00:00
|
|
|
|
2017-04-12 12:20:00 +00:00
|
|
|
ue->ebi = MIN_EPS_BEARER_ID - 1; /* Setup EBI Generator */
|
2017-04-11 14:55:21 +00:00
|
|
|
|
2017-04-12 12:20:00 +00:00
|
|
|
list_init(&ue->pdn_list);
|
2017-04-27 14:06:10 +00:00
|
|
|
list_init(&ue->sess_list);
|
2017-03-05 04:03:11 +00:00
|
|
|
list_append(&enb->ue_list, ue);
|
2017-04-08 02:38:09 +00:00
|
|
|
|
2017-04-12 04:45:57 +00:00
|
|
|
ue->enb = enb;
|
|
|
|
|
2017-04-11 00:32:34 +00:00
|
|
|
fsm_create(&ue->sm, emm_state_initial, emm_state_final);
|
|
|
|
fsm_init(&ue->sm, 0);
|
2017-03-05 04:03:11 +00:00
|
|
|
|
|
|
|
return ue;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
status_t mme_ue_remove(mme_ue_t *ue)
|
2017-03-05 04:03:11 +00:00
|
|
|
{
|
2017-04-06 12:44:30 +00:00
|
|
|
d_assert(self.mme_ue_s1ap_id_hash, return CORE_ERROR, "Null param");
|
2017-03-05 04:03:11 +00:00
|
|
|
d_assert(ue, return CORE_ERROR, "Null param");
|
|
|
|
d_assert(ue->enb, return CORE_ERROR, "Null param");
|
|
|
|
|
2017-04-11 00:32:34 +00:00
|
|
|
fsm_final(&ue->sm, 0);
|
|
|
|
fsm_clear(&ue->sm);
|
2017-03-27 10:32:24 +00:00
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
mme_sess_remove_all(ue);
|
2017-04-12 04:45:57 +00:00
|
|
|
mme_pdn_remove_all(ue);
|
2017-04-08 02:38:09 +00:00
|
|
|
|
2017-03-05 04:03:11 +00:00
|
|
|
list_remove(&ue->enb->ue_list, ue);
|
2017-04-06 12:44:30 +00:00
|
|
|
hash_set(self.mme_ue_s1ap_id_hash, &ue->mme_ue_s1ap_id,
|
|
|
|
sizeof(ue->mme_ue_s1ap_id), NULL);
|
|
|
|
|
2017-04-10 14:59:59 +00:00
|
|
|
index_free(&mme_ue_pool, ue);
|
2017-03-05 04:03:11 +00:00
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
status_t mme_ue_remove_all()
|
|
|
|
{
|
|
|
|
hash_index_t *hi = NULL;
|
|
|
|
mme_ue_t *ue = NULL;
|
|
|
|
|
|
|
|
for (hi = mme_ue_first(); hi; hi = mme_ue_next(hi))
|
|
|
|
{
|
|
|
|
ue = mme_ue_this(hi);
|
|
|
|
mme_ue_remove(ue);
|
|
|
|
}
|
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-10 14:59:59 +00:00
|
|
|
mme_ue_t* mme_ue_find(index_t index)
|
|
|
|
{
|
|
|
|
d_assert(index, return NULL, "Invalid Index");
|
|
|
|
return index_find(&mme_ue_pool, index);
|
|
|
|
}
|
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
mme_ue_t* mme_ue_find_by_mme_ue_s1ap_id(c_uint32_t mme_ue_s1ap_id)
|
|
|
|
{
|
|
|
|
d_assert(self.mme_ue_s1ap_id_hash, return NULL, "Null param");
|
|
|
|
return hash_get(self.mme_ue_s1ap_id_hash,
|
|
|
|
&mme_ue_s1ap_id, sizeof(mme_ue_s1ap_id));
|
|
|
|
}
|
|
|
|
|
|
|
|
hash_index_t *mme_ue_first()
|
|
|
|
{
|
|
|
|
d_assert(self.mme_ue_s1ap_id_hash, return NULL, "Null param");
|
|
|
|
return hash_first(self.mme_ue_s1ap_id_hash);
|
|
|
|
}
|
|
|
|
|
|
|
|
hash_index_t *mme_ue_next(hash_index_t *hi)
|
|
|
|
{
|
|
|
|
return hash_next(hi);
|
|
|
|
}
|
|
|
|
|
|
|
|
mme_ue_t *mme_ue_this(hash_index_t *hi)
|
|
|
|
{
|
|
|
|
d_assert(hi, return NULL, "Null param");
|
|
|
|
return hash_this_val(hi);
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned int mme_ue_count()
|
|
|
|
{
|
|
|
|
d_assert(self.mme_ue_s1ap_id_hash, return 0, "Null param");
|
|
|
|
return hash_count(self.mme_ue_s1ap_id_hash);
|
|
|
|
}
|
|
|
|
|
|
|
|
status_t mme_ue_remove_in_enb(mme_enb_t *enb)
|
2017-03-05 04:03:11 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_ue_t *ue = NULL, *next_ue = NULL;
|
2017-03-05 04:03:11 +00:00
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
ue = mme_ue_first_in_enb(enb);
|
2017-03-05 04:03:11 +00:00
|
|
|
while (ue)
|
|
|
|
{
|
2017-04-06 12:44:30 +00:00
|
|
|
next_ue = mme_ue_next_in_enb(ue);
|
2017-03-05 04:03:11 +00:00
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_ue_remove(ue);
|
2017-03-05 04:03:11 +00:00
|
|
|
|
|
|
|
ue = next_ue;
|
|
|
|
}
|
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_ue_t* mme_ue_find_by_enb_ue_s1ap_id(
|
|
|
|
mme_enb_t *enb, c_uint32_t enb_ue_s1ap_id)
|
2017-03-05 04:03:11 +00:00
|
|
|
{
|
2017-04-06 11:10:00 +00:00
|
|
|
mme_ue_t *ue = NULL;
|
2017-03-05 04:03:11 +00:00
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
ue = mme_ue_first_in_enb(enb);
|
2017-03-05 04:03:11 +00:00
|
|
|
while (ue)
|
|
|
|
{
|
|
|
|
if (enb_ue_s1ap_id == ue->enb_ue_s1ap_id)
|
|
|
|
break;
|
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
ue = mme_ue_next_in_enb(ue);
|
2017-03-05 04:03:11 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return ue;
|
|
|
|
}
|
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
mme_ue_t* mme_ue_first_in_enb(mme_enb_t *enb)
|
2017-03-05 04:03:11 +00:00
|
|
|
{
|
|
|
|
return list_first(&enb->ue_list);
|
|
|
|
}
|
|
|
|
|
2017-04-06 12:44:30 +00:00
|
|
|
mme_ue_t* mme_ue_next_in_enb(mme_ue_t *ue)
|
2017-03-05 04:03:11 +00:00
|
|
|
{
|
|
|
|
return list_next(ue);
|
|
|
|
}
|
|
|
|
|
2017-04-27 23:20:50 +00:00
|
|
|
mme_bearer_t *mme_sess_add(mme_ue_t *ue, c_uint8_t pti)
|
2017-04-27 14:06:10 +00:00
|
|
|
{
|
|
|
|
mme_sess_t *sess = NULL;
|
2017-04-27 23:20:50 +00:00
|
|
|
mme_bearer_t *bearer = NULL;
|
2017-04-27 14:06:10 +00:00
|
|
|
|
|
|
|
index_alloc(&mme_sess_pool, &sess);
|
|
|
|
d_assert(sess, return NULL, "Null param");
|
|
|
|
|
|
|
|
sess->mme_s11_teid = sess->index;
|
|
|
|
sess->mme_s11_addr = mme_self()->s11_addr;
|
|
|
|
|
|
|
|
list_init(&sess->bearer_list);
|
|
|
|
list_append(&ue->sess_list, sess);
|
|
|
|
|
|
|
|
sess->ue = ue;
|
|
|
|
|
2017-04-27 23:20:50 +00:00
|
|
|
bearer = mme_bearer_add(sess, pti);
|
|
|
|
d_assert(bearer, mme_sess_remove(sess); return NULL,
|
|
|
|
"Can't add default bearer context");
|
|
|
|
|
|
|
|
return bearer;
|
2017-04-27 14:06:10 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
status_t mme_sess_remove(mme_sess_t *sess)
|
|
|
|
{
|
|
|
|
d_assert(sess, return CORE_ERROR, "Null param");
|
|
|
|
d_assert(sess->ue, return CORE_ERROR, "Null param");
|
|
|
|
|
|
|
|
mme_bearer_remove_all(sess);
|
|
|
|
|
|
|
|
list_remove(&sess->ue->sess_list, sess);
|
|
|
|
index_free(&mme_sess_pool, sess);
|
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
status_t mme_sess_remove_all(mme_ue_t *ue)
|
|
|
|
{
|
|
|
|
mme_sess_t *sess = NULL, *next_sess = NULL;
|
|
|
|
|
|
|
|
sess = mme_sess_first(ue);
|
|
|
|
while (sess)
|
|
|
|
{
|
|
|
|
next_sess = mme_sess_next(sess);
|
|
|
|
|
|
|
|
mme_sess_remove(sess);
|
|
|
|
|
|
|
|
sess = next_sess;
|
|
|
|
}
|
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
mme_sess_t* mme_sess_find(index_t index)
|
|
|
|
{
|
|
|
|
d_assert(index, return NULL, "Invalid Index");
|
|
|
|
return index_find(&mme_sess_pool, index);
|
|
|
|
}
|
|
|
|
|
|
|
|
mme_sess_t* mme_sess_find_by_teid(c_uint32_t teid)
|
|
|
|
{
|
|
|
|
return mme_sess_find(teid);
|
|
|
|
}
|
|
|
|
|
|
|
|
mme_sess_t* mme_sess_first(mme_ue_t *ue)
|
|
|
|
{
|
|
|
|
return list_first(&ue->sess_list);
|
|
|
|
}
|
|
|
|
|
|
|
|
mme_sess_t* mme_sess_next(mme_sess_t *sess)
|
|
|
|
{
|
|
|
|
return list_next(sess);
|
|
|
|
}
|
|
|
|
|
|
|
|
mme_sess_t* mme_sess_find_by_ebi(mme_ue_t *ue, c_uint8_t ebi)
|
|
|
|
{
|
|
|
|
mme_sess_t *sess = NULL;
|
|
|
|
mme_bearer_t *bearer = NULL;
|
|
|
|
|
|
|
|
sess = mme_sess_first(ue);
|
|
|
|
while (sess)
|
|
|
|
{
|
|
|
|
bearer = mme_bearer_first(sess);
|
|
|
|
while (bearer)
|
|
|
|
{
|
|
|
|
if (ebi == bearer->ebi)
|
|
|
|
return sess;
|
|
|
|
|
|
|
|
bearer = mme_bearer_next(bearer);
|
|
|
|
}
|
|
|
|
|
|
|
|
sess = mme_sess_next(sess);
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
mme_bearer_t* mme_bearer_add(mme_sess_t *sess, c_uint8_t pti)
|
2017-04-08 01:18:48 +00:00
|
|
|
{
|
2017-04-13 10:15:53 +00:00
|
|
|
mme_bearer_t *bearer = NULL;
|
2017-04-27 14:06:10 +00:00
|
|
|
mme_ue_t *ue = NULL;
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
d_assert(sess, return NULL, "Null param");
|
|
|
|
ue = sess->ue;
|
2017-04-08 01:18:48 +00:00
|
|
|
d_assert(ue, return NULL, "Null param");
|
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
index_alloc(&mme_bearer_pool, &bearer);
|
|
|
|
d_assert(bearer, return NULL, "Null param");
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
bearer->pti = pti;
|
|
|
|
bearer->ebi = NEXT_ID(ue->ebi, MIN_EPS_BEARER_ID, MAX_EPS_BEARER_ID);
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
list_append(&sess->bearer_list, bearer);
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
bearer->ue = ue;
|
|
|
|
bearer->sess = sess;
|
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
fsm_create(&bearer->sm, esm_state_initial, esm_state_final);
|
|
|
|
fsm_init(&bearer->sm, 0);
|
2017-04-08 02:38:09 +00:00
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
return bearer;
|
2017-04-08 01:18:48 +00:00
|
|
|
}
|
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
status_t mme_bearer_remove(mme_bearer_t *bearer)
|
2017-04-08 01:18:48 +00:00
|
|
|
{
|
2017-04-13 10:15:53 +00:00
|
|
|
d_assert(bearer, return CORE_ERROR, "Null param");
|
2017-04-27 14:06:10 +00:00
|
|
|
d_assert(bearer->sess, return CORE_ERROR, "Null param");
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
fsm_final(&bearer->sm, 0);
|
|
|
|
fsm_clear(&bearer->sm);
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
list_remove(&bearer->sess->bearer_list, bearer);
|
2017-04-13 10:15:53 +00:00
|
|
|
index_free(&mme_bearer_pool, bearer);
|
2017-04-08 01:18:48 +00:00
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
status_t mme_bearer_remove_all(mme_sess_t *sess)
|
2017-04-08 01:18:48 +00:00
|
|
|
{
|
2017-04-13 10:15:53 +00:00
|
|
|
mme_bearer_t *bearer = NULL, *next_bearer = NULL;
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
d_assert(sess, return CORE_ERROR, "Null param");
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
bearer = mme_bearer_first(sess);
|
2017-04-13 10:15:53 +00:00
|
|
|
while (bearer)
|
2017-04-08 01:18:48 +00:00
|
|
|
{
|
2017-04-13 10:15:53 +00:00
|
|
|
next_bearer = mme_bearer_next(bearer);
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
mme_bearer_remove(bearer);
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
bearer = next_bearer;
|
2017-04-08 01:18:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
mme_bearer_t* mme_bearer_find(index_t index)
|
2017-04-10 14:59:59 +00:00
|
|
|
{
|
|
|
|
d_assert(index, return NULL, "Invalid Index");
|
2017-04-13 10:15:53 +00:00
|
|
|
return index_find(&mme_bearer_pool, index);
|
2017-04-10 14:59:59 +00:00
|
|
|
}
|
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
mme_bearer_t* mme_bearer_find_by_ue_pti(mme_ue_t *ue, c_uint8_t pti)
|
2017-04-08 01:18:48 +00:00
|
|
|
{
|
2017-04-27 14:06:10 +00:00
|
|
|
mme_sess_t *sess = NULL;
|
2017-04-13 10:15:53 +00:00
|
|
|
mme_bearer_t *bearer = NULL;
|
2017-04-08 01:18:48 +00:00
|
|
|
|
|
|
|
d_assert(ue, return NULL, "Null param");
|
2017-04-27 14:06:10 +00:00
|
|
|
|
|
|
|
sess = mme_sess_first(ue);
|
|
|
|
while (sess)
|
2017-04-08 01:18:48 +00:00
|
|
|
{
|
2017-04-27 14:06:10 +00:00
|
|
|
bearer = mme_bearer_first(sess);
|
|
|
|
while (bearer)
|
|
|
|
{
|
|
|
|
if (pti == bearer->pti)
|
|
|
|
return bearer;
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
bearer = mme_bearer_next(bearer);
|
|
|
|
}
|
|
|
|
|
|
|
|
sess = mme_sess_next(sess);
|
2017-04-08 01:18:48 +00:00
|
|
|
}
|
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
return NULL;
|
2017-04-08 01:18:48 +00:00
|
|
|
}
|
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
mme_bearer_t* mme_bearer_find_by_ue_ebi(mme_ue_t *ue, c_uint8_t ebi)
|
2017-04-12 12:44:18 +00:00
|
|
|
{
|
2017-04-27 14:06:10 +00:00
|
|
|
mme_sess_t *sess = NULL;
|
2017-04-13 10:15:53 +00:00
|
|
|
mme_bearer_t *bearer = NULL;
|
2017-04-12 12:44:18 +00:00
|
|
|
|
|
|
|
d_assert(ue, return NULL, "Null param");
|
2017-04-27 14:06:10 +00:00
|
|
|
|
|
|
|
sess = mme_sess_first(ue);
|
|
|
|
while (sess)
|
|
|
|
{
|
|
|
|
bearer = mme_bearer_first(sess);
|
|
|
|
while (bearer)
|
|
|
|
{
|
|
|
|
if (ebi == bearer->ebi)
|
|
|
|
return bearer;
|
|
|
|
|
|
|
|
bearer = mme_bearer_next(bearer);
|
|
|
|
}
|
|
|
|
|
|
|
|
sess = mme_sess_next(sess);
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
mme_bearer_t* mme_bearer_find_by_sess_ebi(mme_sess_t *sess, c_uint8_t ebi)
|
|
|
|
{
|
|
|
|
mme_bearer_t *bearer = NULL;
|
|
|
|
|
|
|
|
d_assert(sess, return NULL, "Null param");
|
|
|
|
|
|
|
|
bearer = mme_bearer_first(sess);
|
2017-04-13 10:15:53 +00:00
|
|
|
while (bearer)
|
2017-04-12 12:44:18 +00:00
|
|
|
{
|
2017-04-13 10:15:53 +00:00
|
|
|
if (ebi == bearer->ebi)
|
2017-04-27 14:06:10 +00:00
|
|
|
return bearer;
|
2017-04-12 12:44:18 +00:00
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
bearer = mme_bearer_next(bearer);
|
2017-04-12 12:44:18 +00:00
|
|
|
}
|
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
return NULL;
|
2017-04-12 12:44:18 +00:00
|
|
|
}
|
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
mme_bearer_t* mme_bearer_first(mme_sess_t *sess)
|
2017-04-08 01:18:48 +00:00
|
|
|
{
|
2017-04-27 14:06:10 +00:00
|
|
|
d_assert(sess, return NULL, "Null param");
|
2017-04-08 01:18:48 +00:00
|
|
|
|
2017-04-27 14:06:10 +00:00
|
|
|
return list_first(&sess->bearer_list);
|
2017-04-08 01:18:48 +00:00
|
|
|
}
|
|
|
|
|
2017-04-13 10:15:53 +00:00
|
|
|
mme_bearer_t* mme_bearer_next(mme_bearer_t *bearer)
|
2017-04-08 01:18:48 +00:00
|
|
|
{
|
2017-04-13 10:15:53 +00:00
|
|
|
return list_next(bearer);
|
2017-04-08 01:18:48 +00:00
|
|
|
}
|
2017-04-12 04:45:57 +00:00
|
|
|
|
|
|
|
pdn_t* mme_pdn_add(mme_ue_t *ue, c_int8_t *apn)
|
|
|
|
{
|
|
|
|
pdn_t *pdn = NULL;
|
|
|
|
|
|
|
|
d_assert(ue, return NULL, "Null param");
|
|
|
|
d_assert(apn, return NULL, "Null param");
|
|
|
|
|
|
|
|
pool_alloc_node(&mme_pdn_pool, &pdn);
|
|
|
|
d_assert(pdn, return NULL, "PDN context allocation failed");
|
|
|
|
|
|
|
|
memset(pdn, 0, sizeof(pdn_t));
|
|
|
|
strcpy(pdn->apn, apn);
|
|
|
|
|
|
|
|
pdn->context = ue;
|
|
|
|
list_append(&ue->pdn_list, pdn);
|
|
|
|
|
|
|
|
return pdn;
|
|
|
|
}
|
|
|
|
|
|
|
|
status_t mme_pdn_remove(pdn_t *pdn)
|
|
|
|
{
|
|
|
|
mme_ue_t *ue = NULL;
|
|
|
|
|
|
|
|
d_assert(pdn, return CORE_ERROR, "Null param");
|
|
|
|
ue = pdn->context;
|
|
|
|
d_assert(ue, return CORE_ERROR, "Null param");
|
|
|
|
|
|
|
|
list_remove(&ue->pdn_list, pdn);
|
|
|
|
pool_free_node(&mme_pdn_pool, pdn);
|
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
status_t mme_pdn_remove_all(mme_ue_t *ue)
|
|
|
|
{
|
|
|
|
pdn_t *pdn = NULL, *next_pdn = NULL;
|
|
|
|
|
|
|
|
d_assert(ue, return CORE_ERROR, "Null param");
|
|
|
|
|
|
|
|
pdn = list_first(&ue->pdn_list);
|
|
|
|
while (pdn)
|
|
|
|
{
|
|
|
|
next_pdn = list_next(pdn);
|
|
|
|
|
|
|
|
mme_pdn_remove(pdn);
|
|
|
|
|
|
|
|
pdn = next_pdn;
|
|
|
|
}
|
|
|
|
|
|
|
|
return CORE_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
pdn_t* mme_pdn_find_by_apn(mme_ue_t *ue, c_int8_t *apn)
|
|
|
|
{
|
|
|
|
pdn_t *pdn = NULL;
|
|
|
|
|
|
|
|
d_assert(ue, return NULL, "Null param");
|
|
|
|
|
|
|
|
pdn = list_first(&ue->pdn_list);
|
|
|
|
while (pdn)
|
|
|
|
{
|
|
|
|
if (strcmp(pdn->apn, apn) == 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
pdn = list_next(pdn);
|
|
|
|
}
|
|
|
|
|
|
|
|
return pdn;
|
|
|
|
}
|
|
|
|
|
|
|
|
pdn_t* mme_pdn_first(mme_ue_t *ue)
|
|
|
|
{
|
|
|
|
d_assert(ue, return NULL, "Null param");
|
|
|
|
return list_first(&ue->pdn_list);
|
|
|
|
}
|
|
|
|
|
|
|
|
pdn_t* mme_pdn_next(pdn_t *pdn)
|
|
|
|
{
|
|
|
|
return list_next(pdn);
|
|
|
|
}
|
|
|
|
|