gprs_bssgp_rim: add decoder for RIM ROUTING ADDRESS
We have a decoder for RIM ROUTING INFORMATION (bssgp_parse_rim_ri),
let's also have a decoder for RIM ROUTING ADDRESS (bssgp_parse_rim_ra.
Related: OS#6095
Change-Id: Ibca1f08906c4ffeecdae80d4e91c6c7b05fe4f8a
diff --git a/src/gb/gprs_bssgp_rim.c b/src/gb/gprs_bssgp_rim.c
index d7b19e7..9c09e1e 100644
--- a/src/gb/gprs_bssgp_rim.c
+++ b/src/gb/gprs_bssgp_rim.c
@@ -49,12 +49,13 @@
{ 0, NULL }
};
-/*! Parse a RIM Routing information IE (3GPP TS 48.018, chapter 11.3.70).
+/*! Parse a RIM Routing address IE (3GPP TS 29.060, chapter 7.7.57 and 7.7.77).
* \param[out] ri user provided memory to store the parsed results.
- * \param[in] buf input buffer of the value part of the IE.
+ * \param[in] buf input buffer of the value part of the RIM Routing address IE.
+ * \discr[in] discr value part (one byte) of the RIM Routing Address Discriminator IE.
* \returns length of parsed octets, -EINVAL on error. */
-int bssgp_parse_rim_ri(struct bssgp_rim_routing_info *ri, const uint8_t *buf,
- unsigned int len)
+int bssgp_parse_rim_ra(struct bssgp_rim_routing_info *ri, const uint8_t *buf,
+ unsigned int len, uint8_t discr)
{
struct gprs_ra_id raid_temp;
@@ -62,23 +63,22 @@
if (len < 2)
return -EINVAL;
- ri->discr = buf[0] & 0x0f;
- buf++;
+ ri->discr = discr;
switch (ri->discr) {
case BSSGP_RIM_ROUTING_INFO_GERAN:
- if (len < 9)
+ if (len < 8)
return -EINVAL;
ri->geran.cid = bssgp_parse_cell_id(&ri->geran.raid, buf);
- return 9;
+ return 8;
case BSSGP_RIM_ROUTING_INFO_UTRAN:
- if (len < 9)
+ if (len < 8)
return -EINVAL;
gsm48_parse_ra(&ri->utran.raid, buf);
ri->utran.rncid = osmo_load16be(buf + 6);
- return 9;
+ return 8;
case BSSGP_RIM_ROUTING_INFO_EUTRAN:
- if (len < 7 || len > 14)
+ if (len < 6 || len > 13)
return -EINVAL;
/* Note: 3GPP TS 24.301 Figure 9.9.3.32.1 and 3GPP TS 24.008
* Figure 10.5.130 specify MCC/MNC encoding in the same way,
@@ -88,14 +88,35 @@
ri->eutran.tai.mnc = raid_temp.mnc;
ri->eutran.tai.mnc_3_digits = raid_temp.mnc_3_digits;
ri->eutran.tai.tac = osmo_load16be(buf + 3);
- memcpy(ri->eutran.global_enb_id, buf + 5, len - 6);
- ri->eutran.global_enb_id_len = len - 6;
+ memcpy(ri->eutran.global_enb_id, buf + 5, len - 5);
+ ri->eutran.global_enb_id_len = len - 5;
return len;
default:
return -EINVAL;
}
}
+/*! Parse a RIM Routing information IE (3GPP TS 48.018, chapter 11.3.70).
+ * \param[out] ri user provided memory to store the parsed results.
+ * \param[in] buf input buffer of the value part of the IE.
+ * \returns length of parsed octets, -EINVAL on error. */
+int bssgp_parse_rim_ri(struct bssgp_rim_routing_info *ri, const uint8_t *buf,
+ unsigned int len)
+{
+ uint8_t discr;
+ int rc;
+
+ if (len < 1)
+ return -EINVAL;
+
+ discr = buf[0] & 0x0f;
+
+ rc = bssgp_parse_rim_ra(ri, buf + 1, len - 1, discr);
+ if (rc < 0)
+ return rc;
+ return rc + 1;
+}
+
/*! Encode a RIM Routing information IE (3GPP TS 48.018, chapter 11.3.70).
* \param[out] buf user provided memory (at least 14 byte) for the generated value part of the IE.
* \param[in] ri user provided input data struct.