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openairinterface5g/openair3/UICC/pdu_session.c

101 lines
4.1 KiB
C

/*
* SPDX-License-Identifier: LicenseRef-CSSL-1.0
*/
#include <assert.h>
#include "pdu_session.h"
// we can't include the file for PDU session type defines, as it pulls in too
// much. However, we only use it for mapping types to integers, which are
// standard defined, so it should be ok.
//#include "openair3/NAS/NR_UE/5GS/5GSM/MSG/PduSessionEstablishmentAccept.h"
#include "common/utils/utils.h"
#include "common/config/config_paramdesc.h"
#include "common/config/config_userapi.h"
// clang-format off
// Note: Default PDU session ID 0 does not exist and will be replaced with PDU
// session index if not set to a parameter > 0!
#define PDU_SESS_PARAMS_DESC { \
{"id", "PDU session ID\n", 0, .iptr=NULL, .defintval=0, TYPE_INT, 0}, \
{"type", "PDU session type\n", 0, .strptr=NULL, .defstrval="IPv4", TYPE_STRING, 0}, \
{"nssai_sst", "NSSAI slice type\n", 0, .u8ptr=NULL, .defintval=1, TYPE_UINT8, 0}, \
{"nssai_sd", "NSSAI slice differentiator\n", 0, .uptr=NULL, .defintval=0xffffff, TYPE_UINT32, 0}, \
{"dnn", "PDU session DNN (APN)\n", 0, .strptr=NULL, .defstrval="oai", TYPE_STRING, 0}, \
}
#define PDU_SESS_PARAMS_CHECK { \
{.s2 = {config_check_intrange, {0, 255}}}, \
{.s3a = {config_checkstr_assign_integer, \
{"IPv4", "IPv6", "IPv4v6", "Ethernet"}, \
{1 /*PDU_SESSION_TYPE_IPV4*/, \
2 /*PDU_SESSION_TYPE_IPV6*/, \
3 /*PDU_SESSION_TYPE_IPV4V6*/, \
5 /*PDU_SESSION_TYPE_ETHER*/}, \
4}}, \
{.s2 = {config_check_intrange, {1, 4}}}, \
{.s2 = {config_check_intrange, {1, 0xffffff}}}, \
{.s4 = {config_check_dnn}}, \
}
// clang-format on
static int config_check_dnn(configmodule_interface_t *cfg, paramdef_t *param)
{
UNUSED(cfg);
const char *dnn = *param->strptr;
int dnn_len = strlen(dnn);
if (dnn_len > 102) {
printf("DNN '%s' exceeds max len of 102 (is %d) (TS 24.501 §9.11.2.1A)\n", dnn, dnn_len);
return -1;
}
// check for valid characters in the APN (TS 23.003 §9.1)
// we don't enforce all conditions
const char *allowed = "abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"0123456789.-";
while (*dnn) {
if (!strchr(allowed, *dnn)) {
printf("character '%c' in DNN '%s' is not allowed (TS 23.003 §9.1)\n", *dnn, *param->strptr);
return -1;
}
dnn++;
}
return 0;
}
int get_pdu_session_configs(const char *uiccName, pdu_session_config_t *configs, int max_len)
{
paramdef_t pdu_sess_params[] = PDU_SESS_PARAMS_DESC;
const int npsp = sizeofArray(pdu_sess_params);
paramlist_def_t pdu_sess_list = {"pdu_sessions"};
checkedparam_t pdu_sess_params_check[] = PDU_SESS_PARAMS_CHECK;
static_assert(sizeofArray(pdu_sess_params) == sizeofArray(pdu_sess_params_check),
"param_def_t array and corresponding checkedparam_t array should have the same size");
for (int i = 0; i < sizeofArray(pdu_sess_params); ++i)
pdu_sess_params[i].chkPptr = &pdu_sess_params_check[i];
int ret = config_getlist(config_get_if(), &pdu_sess_list, pdu_sess_params, sizeofArray(pdu_sess_params), uiccName);
if (ret < 0) {
// couldn't load configuration from pdu_sessions, caller has to handle
return -1;
}
int num = pdu_sess_list.numelt;
AssertFatal(num <= max_len, "cannot handle more than %d PDU sessions\n", max_len);
for (int i = 0; i < num; ++i) {
pdu_session_config_t *pdu = configs + i;
paramdef_t *p = pdu_sess_list.paramarray[i];
int id = *gpd(p, npsp, "id")->iptr;
pdu->id = id > 0 ? id : i + 1; // if not user-specified ID, use PDU session index
pdu->type = config_get_processedint(config_get_if(), (paramdef_t *)gpd(p, npsp, "type"));
pdu->nssai.sst = *gpd(p, npsp, "nssai_sst")->iptr;
pdu->nssai.sd = *gpd(p, npsp, "nssai_sd")->iptr;
pdu->dnn = strdup(*gpd(p, npsp, "dnn")->strptr);
}
return num;
}