Create request channel reason to see channel requests originating from PAG
diff --git a/include/openbsc/gsm_04_08.h b/include/openbsc/gsm_04_08.h
index b9a2cc8..081e869 100644
--- a/include/openbsc/gsm_04_08.h
+++ b/include/openbsc/gsm_04_08.h
@@ -344,6 +344,7 @@
void gsm0408_generate_lai(struct gsm48_loc_area_id *lai48, u_int16_t mcc,
u_int16_t mnc, u_int16_t lac);
enum gsm_chan_t get_ctype_by_chreq(struct gsm_bts *bts, u_int8_t ra);
+enum gsm_chreq_reason_t get_reason_by_chreq(struct gsm_bts *bts, u_int8_t ra);
#endif
diff --git a/include/openbsc/gsm_data.h b/include/openbsc/gsm_data.h
index c0c431e..9c0ac55 100644
--- a/include/openbsc/gsm_data.h
+++ b/include/openbsc/gsm_data.h
@@ -60,6 +60,16 @@
GSM_LCHAN_UNKNOWN,
};
+
+/* Channel Request reason */
+enum gsm_chreq_reason_t {
+ GSM_CHREQ_REASON_EMERG,
+ GSM_CHREQ_REASON_PAG,
+ GSM_CHREQ_REASON_CALL,
+ GSM_CHREQ_REASON_LOCATION_UPD,
+ GSM_CHREQ_REASON_OTHER,
+};
+
struct gsm_lchan {
/* The TS that we're part of */
struct gsm_bts_trx_ts *ts;
diff --git a/src/gsm_04_08.c b/src/gsm_04_08.c
index a37d583..a1a8f37 100644
--- a/src/gsm_04_08.c
+++ b/src/gsm_04_08.c
@@ -688,6 +688,21 @@
[CHREQ_T_PAG_R_TCH_FH] = GSM_LCHAN_TCH_F,
};
+static const enum gsm_chreq_reason_t reason_by_chreq[] = {
+ [CHREQ_T_EMERG_CALL] = GSM_CHREQ_REASON_EMERG,
+ [CHREQ_T_CALL_REEST_TCH_F] = GSM_CHREQ_REASON_CALL,
+ [CHREQ_T_CALL_REEST_TCH_H] = GSM_CHREQ_REASON_CALL,
+ [CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_CHREQ_REASON_CALL,
+ [CHREQ_T_SDCCH] = GSM_CHREQ_REASON_OTHER,
+ [CHREQ_T_TCH_F] = GSM_CHREQ_REASON_OTHER,
+ [CHREQ_T_VOICE_CALL_TCH_H] = GSM_CHREQ_REASON_OTHER,
+ [CHREQ_T_DATA_CALL_TCH_H] = GSM_CHREQ_REASON_OTHER,
+ [CHREQ_T_LOCATION_UPD] = GSM_CHREQ_REASON_LOCATION_UPD,
+ [CHREQ_T_PAG_R_ANY] = GSM_CHREQ_REASON_PAG,
+ [CHREQ_T_PAG_R_TCH_F] = GSM_CHREQ_REASON_PAG,
+ [CHREQ_T_PAG_R_TCH_FH] = GSM_CHREQ_REASON_PAG,
+};
+
enum gsm_chan_t get_ctype_by_chreq(struct gsm_bts *bts, u_int8_t ra)
{
int i;
@@ -701,3 +716,17 @@
fprintf(stderr, "Unknown CHANNEL REQUEST RQD 0x%02x\n", ra);
return GSM_LCHAN_SDCCH;
}
+
+enum gsm_chreq_reason_t get_reason_by_chreq(struct gsm_bts *bts, u_int8_t ra)
+{
+ int i;
+ /* FIXME: determine if we set NECI = 0 in the BTS SI4 */
+
+ for (i = 0; i < ARRAY_SIZE(chreq_type_neci0); i++) {
+ const struct chreq *chr = &chreq_type_neci0[i];
+ if ((ra & chr->mask) == chr->val)
+ return reason_by_chreq[chr->type];
+ }
+ fprintf(stderr, "Unknown CHANNEL REQUEST REASON 0x%02x\n", ra);
+ return GSM_CHREQ_REASON_OTHER;
+}