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SGW selection mode is added (#100)

This commit is contained in:
Sukchan Lee 2018-09-23 14:29:19 +09:00
parent aea1d83026
commit f5599896ff
3 changed files with 114 additions and 5 deletions
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84
src/mme/mme_context.c
View File

@ -1296,6 +1296,8 @@ status_t mme_context_parse_config()
int i, num = 0;
const char *hostname[MAX_NUM_OF_HOSTNAME];
c_uint16_t port = self.gtpc_port;
c_uint16_t tac[MAX_NUM_OF_TAI] = {0,};
c_uint8_t num_of_tac = 0;
if (yaml_iter_type(&gtpc_array) == YAML_MAPPING_NODE)
{
@ -1366,6 +1368,36 @@ status_t mme_context_parse_config()
const char *v = yaml_iter_value(&gtpc_iter);
if (v) port = atoi(v);
}
else if (!strcmp(gtpc_key, "tac"))
{
yaml_iter_t tac_iter;
yaml_iter_recurse(&gtpc_iter, &tac_iter);
d_assert(yaml_iter_type(&tac_iter) !=
YAML_MAPPING_NODE, return CORE_ERROR,);
do
{
const char *v = NULL;
d_assert(num_of_tac <=
MAX_NUM_OF_TAI, return CORE_ERROR,);
if (yaml_iter_type(&tac_iter) ==
YAML_SEQUENCE_NODE)
{
if (!yaml_iter_next(&tac_iter))
break;
}
v = yaml_iter_value(&tac_iter);
if (v)
{
tac[num_of_tac] = atoi(v);
num_of_tac++;
}
} while(
yaml_iter_type(&tac_iter) ==
YAML_SEQUENCE_NODE);
}
else
d_warn("unknown key `%s`", gtpc_key);
}
@ -1384,10 +1416,27 @@ status_t mme_context_parse_config()
context_self()->parameter.prefer_ipv4);
d_assert(sgw, return CORE_ERROR,);
sgw->num_of_tac = num_of_tac;
if (num_of_tac != 0)
memcpy(sgw->tac, tac, sizeof(sgw->tac));
core_freeaddrinfo(list);
} while(yaml_iter_type(&gtpc_array) == YAML_SEQUENCE_NODE);
}
else if(!strcmp(mme_key, "selection_mode"))
{
const char *selection_mode =
yaml_iter_value(&mme_iter);
if (!strcmp(selection_mode, "rr"))
self.sgw_selection = SGW_SELECT_RR;
else if (!strcmp(selection_mode, "tac"))
self.sgw_selection = SGW_SELECT_TAC;
else
d_warn("unknown sgw_selection mode `%s`",
selection_mode);
}
}
}
else if (!strcmp(root_key, "pgw"))
@ -1615,6 +1664,7 @@ mme_sgw_t *mme_sgw_add(
pool_alloc_node(&mme_sgw_pool, &sgw);
d_assert(sgw, return NULL, "Null param");
memset(sgw, 0, sizeof *sgw);
rv = gtp_create_node(&sgw->gnode, all_list, no_ipv4, no_ipv6, prefer_ipv4);
d_assert(rv == CORE_OK, return NULL,);
@ -2072,13 +2122,39 @@ mme_ue_t* mme_ue_add(enb_ue_t *enb_ue)
/* Create New GUTI */
mme_ue_new_guti(mme_ue);
/* Setup SGW with round-robin manner */
if (mme_self()->sgw == NULL)
if (mme_self()->sgw_selection == SGW_SELECT_RR)
{
/* Setup SGW with round-robin manner */
if (mme_self()->sgw == NULL)
mme_self()->sgw = list_first(&mme_self()->sgw_list);
d_assert(mme_self()->sgw, return NULL,);
SETUP_GTP_NODE(mme_ue, mme_self()->sgw->gnode);
mme_self()->sgw = list_next(mme_self()->sgw);
}
else if (mme_self()->sgw_selection == SGW_SELECT_TAC)
{
/* Select SGW by eNB TAC */
int i, found = 0;
mme_self()->sgw = list_first(&mme_self()->sgw_list);
while(mme_self()->sgw && !found)
{
for (i = 0; i < mme_self()->sgw->num_of_tac && !found; i++)
found = mme_self()->sgw->tac[i] == enb_ue->nas.tai.tac ? 1: 0;
SETUP_GTP_NODE(mme_ue, mme_self()->sgw->gnode);
if (!found)
mme_self()->sgw = list_next(mme_self()->sgw);
}
mme_self()->sgw = list_next(mme_self()->sgw);
d_assert(mme_self()->sgw, return NULL,);
SETUP_GTP_NODE(mme_ue, mme_self()->sgw->gnode);
}
else
d_assert(0, return NULL, "Invalid Selection Mode: %d",
mme_self()->sgw_selection);
/* Create paging retry timer */
mme_ue->t3413 = timer_create(&self.tm_service, MME_EVT_EMM_T3413,

11
src/mme/mme_context.h
View File

@ -47,6 +47,11 @@ typedef struct _fd_config_t fd_config_t;
typedef c_uint32_t mme_m_tmsi_t;
typedef enum {
SGW_SELECT_RR = 0, /* Default SGW Selection Method */
SGW_SELECT_TAC,
} sgw_select_e;
typedef struct _served_gummei {
c_uint32_t num_of_plmn_id;
plmn_id_t plmn_id[MAX_PLMN_ID];
@ -140,12 +145,18 @@ typedef struct _mme_context_t {
/* Network Name */
nas_network_name_t short_name; /* Network short name */
nas_network_name_t full_name; /* Network Full Name */
/* SGW Selection */
sgw_select_e sgw_selection;
} mme_context_t;
typedef struct _mme_sgw_t {
lnode_t node;
c_uint16_t tac[MAX_NUM_OF_TAI];
c_uint8_t num_of_tac;
gtp_node_t *gnode;
} mme_sgw_t;

24
support/config/nextepc.conf.in
View File

@ -203,7 +203,29 @@ sgw:
addr: 127.0.0.2
#
# <GTP-U Server>>
# <SGW Selection Mode>
#
# o Round-Robin
# (If you does not set the `selection_mode`, default mode is Round-Robin)
#
# selection_mode: rr
# gtpc:
# addr: 127.0.0.2
# addr: 127.0.2.2
# addr: 127.0.4.2
#
# o SGW selection by eNodeB TAC
#
# selection_mode: tac
# gtpc:
# - addr: 127.0.0.2
# tac: 26000
# - addr: 127.0.2.2
# tac: [25000, 27000, 28000]
#
#
# <GTP-U Server>
#
# o GTP-U Server(all address avaiable)
# gtpu: