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ranap: Parse InitialUE message and hex-print NAS PDU

This commit is contained in:
Harald Welte 2015-09-11 19:48:06 +02:00
parent 0f0ea8112f
commit 80401adcb0
1 changed files with 51 additions and 0 deletions
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51
src/hnbgw_ranap.c
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@ -1,5 +1,6 @@
#include <osmocom/core/msgb.h>
#include <osmocom/core/utils.h>
#include <osmocom/gsm/gsm48.h>
#include <unistd.h>
#include <errno.h>
@ -349,11 +350,58 @@ static int ranap_rx_init_reset(struct hnb_context *hnb, ANY_t *in)
DEBUGP(DMAIN, "RESET.req\n");
/* FIXME: Actually we have to wait for some guard time? */
/* FIXME: Reset all resources related to this HNB/RNC */
ranap_tx_reset_ack(hnb, ies.cN_DomainIndicator);
return 0;
}
int ranap_parse_lai(struct gprs_ra_id *ra_id, const RANAP_LAI_t *lai)
{
uint8_t *ptr = lai->pLMNidentity.buf;
/* TS 25.413 9.2.3.55 */
if (lai->pLMNidentity.size != 3)
return -1;
ra_id->mcc = (ptr[0] & 0xF) * 100 +
(ptr[0] >> 4) * 10 +
(ptr[1] & 0xF);
ra_id->mnc = (ptr[2] & 0xF) +
(ptr[2] >> 4) * 10;
if ((ptr[1] >> 4) != 0xF)
ra_id->mnc += (ptr[1] >> 4) * 100;
ra_id->lac = asn1str_to_u16(&lai->lAC);
/* TS 25.413 9.2.3.6 */
if (ra_id->lac == 0 || ra_id->lac == 0xfffe)
return -1;
return 0;
}
static int ranap_rx_init_ue_msg(struct hnb_context *hnb, ANY_t *in)
{
RANAP_InitialUE_MessageIEs_t ies;
struct gprs_ra_id ra_id;
int rc;
rc = ranap_decode_initialue_messageies(&ies, in);
if (rc < 0)
return rc;
/* location area ID of the serving cell */
ranap_parse_lai(&ra_id, &ies.lai);
DEBUGP(DMAIN, "%u-%u-%u: InitialUE: %s\n", ra_id.mcc, ra_id.mnc,
ra_id.lac, osmo_hexdump(ies.nas_pdu.buf, ies.nas_pdu.size));
/* FIXME: hand NAS PDU into MSC */
return 0;
}
static int ranap_rx_initiating_msg(struct hnb_context *hnb, RANAP_InitiatingMessage_t *imsg)
{
int rc;
@ -362,6 +410,9 @@ static int ranap_rx_initiating_msg(struct hnb_context *hnb, RANAP_InitiatingMess
case RANAP_ProcedureCode_id_Reset:
rc = ranap_rx_init_reset(hnb, &imsg->value);
break;
case RANAP_ProcedureCode_id_InitialUE_Message:
rc = ranap_rx_init_ue_msg(hnb, &imsg->value);
break;
}
}