diff options
Diffstat (limited to 'src/osmo-bsc/osmo_bsc_bssap.c')
| -rw-r--r-- | src/osmo-bsc/osmo_bsc_bssap.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/src/osmo-bsc/osmo_bsc_bssap.c b/src/osmo-bsc/osmo_bsc_bssap.c index ddebb6a7d..0d6127258 100644 --- a/src/osmo-bsc/osmo_bsc_bssap.c +++ b/src/osmo-bsc/osmo_bsc_bssap.c @@ -1006,6 +1006,66 @@ reject: return -EINVAL; } +/* Handle Confusion message, MSC indicating an error to us: + * + * See 3GPP TS 48.008 ยง3.2.1.45 + */ +static int bssmap_handle_confusion(struct gsm_subscriber_connection *conn, + struct msgb *msg, unsigned int length) +{ + struct tlv_parsed tp; + int diag_len; + enum gsm0808_cause cause; + enum gsm0808_cause_class cause_class; + struct gsm0808_diagnostics *diag; + + osmo_bssap_tlv_parse(&tp, msg->l4h + 1, length - 1); + + /* Check for the Cause and Diagnostic mandatory elements */ + if (!TLVP_PRESENT(&tp, GSM0808_IE_CAUSE) || !TLVP_PRESENT(&tp, GSM0808_IE_DIAGNOSTIC)) { + LOGPFSML(conn->fi, LOGL_ERROR, + "Received Confusion message," + " but either Cause or Diagnostic mandatory IE is not present: %s\n", + osmo_hexdump(msg->l4h, length)); + return -EINVAL; + } + + diag_len = TLVP_LEN(&tp, GSM0808_IE_DIAGNOSTIC); + if (diag_len < 5) { + LOGPFSML(conn->fi, LOGL_ERROR, + "Received Confusion message with short Diagnostic length: %d (expected > 5)\n", + diag_len); + return -EINVAL; + } + + cause = gsm0808_get_cause(&tp); + cause_class = gsm0808_cause_class(cause); + LOGPFSML(conn->fi, LOGL_ERROR, + "Received Confusion message: Cause %d/0x%x (%s)", + cause, cause, gsm0808_cause_name(cause)); + LOGPFSML(conn->fi, LOGL_ERROR, + "Received Confusion message: Cause class %d/0x%x (%s)", + cause_class, cause_class, gsm0808_cause_class_name(cause_class)); + + diag = (struct gsm0808_diagnostics *)TLVP_VAL(&tp, GSM0808_IE_DIAGNOSTIC); + /* octet location */ + LOGPFSML(conn->fi, LOGL_ERROR, + " Confusion Diagnostics error octet location %d (%s)\n", + diag->error_pointer_octet, + gsm0808_diagnostics_octet_location_str(diag->error_pointer_octet)); + /* bit location */ + LOGPFSML(conn->fi, LOGL_ERROR, + " Confusion Diagnostics error bit location: %d (%s)\n", + diag->error_pointer_bit, + gsm0808_diagnostics_bit_location_str(diag->error_pointer_bit)); + /* received message dump */ + LOGPFSML(conn->fi, LOGL_ERROR, + " Confusion Diagnostics message that provoked the error: %s\n", + osmo_hexdump(diag->msg, diag_len-2)); + + return 0; +} + static int bssmap_rcvmsg_udt(struct bsc_msc_data *msc, struct msgb *msg, unsigned int length) { @@ -1082,6 +1142,10 @@ static int bssmap_rcvmsg_dt1(struct gsm_subscriber_connection *conn, rate_ctr_inc(&ctrs[MSC_CTR_BSSMAP_RX_DT1_CLASSMARK_RQST]); ret = gsm48_send_rr_classmark_enquiry(conn->lchan); break; + case BSS_MAP_MSG_CONFUSION: + rate_ctr_inc(&ctrs[MSC_CTR_BSSMAP_RX_DT1_CONFUSION]); + ret = bssmap_handle_confusion(conn, msg, length); + break; default: rate_ctr_inc(&ctrs[MSC_CTR_BSSMAP_RX_DT1_UNKNOWN]); LOGP(DMSC, LOGL_NOTICE, "Unimplemented msg type: %s\n", |