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Jacob Erlbeck jerlbeck at sysmocom.deThis changes the implementations for the reception of RESET and
RESET_ACK to be compatible with 3GPP TS 08.16, 7.3.1:
- Just send a RESET_ACK with correct values back to the SGSN when a
RESET with an invalid NSVCI or NSEI has been received.
- Check RESET_ACK for matching NSEI and NSVCI.
- Ignore unexpected RESET_ACKs.
In addition, use RESET_ACK from a BSS to update the BSS source
address based on the NSVCI to be tolerant with changing UDP source
addresses/ports.
Sponsored-by: On-Waves ehf
---
include/osmocom/gprs/gprs_ns.h | 5 +
src/gb/gprs_ns.c | 259 +++++++++++++++++++++++++++++++++-------
tests/gb/gprs_ns_test.c | 6 +
tests/gb/gprs_ns_test.ok | 104 +++++++---------
4 files changed, 269 insertions(+), 105 deletions(-)
diff --git a/include/osmocom/gprs/gprs_ns.h b/include/osmocom/gprs/gprs_ns.h
index b28c58d..296800e 100644
--- a/include/osmocom/gprs/gprs_ns.h
+++ b/include/osmocom/gprs/gprs_ns.h
@@ -36,6 +36,7 @@ enum ns_timeout {
#define NSE_S_BLOCKED 0x0001
#define NSE_S_ALIVE 0x0002
+#define NSE_S_RESET 0x0004
/*! \brief Osmocom NS link layer types */
enum gprs_ns_ll {
@@ -199,12 +200,16 @@ enum signal_ns {
S_NS_UNBLOCK,
S_NS_ALIVE_EXP, /* Tns-alive expired more than N times */
S_NS_REPLACED, /* nsvc object is replaced (sets old_nsvc) */
+ S_NS_MISMATCH, /* got an unexpected IE (sets msg, pdu_type, ie_type) */
};
struct ns_signal_data {
struct gprs_nsvc *nsvc;
struct gprs_nsvc *old_nsvc;
uint8_t cause;
+ uint8_t pdu_type;
+ uint8_t ie_type;
+ struct msgb *msg;
};
void gprs_ns_set_log_ss(int ss);
diff --git a/src/gb/gprs_ns.c b/src/gb/gprs_ns.c
index 6a35ad3..b50a700 100644
--- a/src/gb/gprs_ns.c
+++ b/src/gb/gprs_ns.c
@@ -102,6 +102,8 @@ enum ns_ctr {
NS_CTR_DEAD,
NS_CTR_REPLACED,
NS_CTR_NSEI_CHG,
+ NS_CTR_INV_VCI,
+ NS_CTR_INV_NSEI,
};
static const struct rate_ctr_desc nsvc_ctr_description[] = {
@@ -113,6 +115,8 @@ static const struct rate_ctr_desc nsvc_ctr_description[] = {
{ "dead", "NS-VC gone dead count " },
{ "replaced", "NS-VC replaced other count" },
{ "nsei-chg", "NS-VC changed NSEI " },
+ { "inv-nsvci", "NS-VCI was invalid count " },
+ { "inv-nsei", "NSEI was invalid count " },
};
static const struct rate_ctr_group_desc nsvc_ctrg_desc = {
@@ -190,6 +194,7 @@ struct gprs_nsvc *gprs_nsvc_create(struct gprs_ns_inst *nsi, uint16_t nsvci)
nsvc = talloc_zero(nsi, struct gprs_nsvc);
nsvc->nsvci = nsvci;
+ nsvc->nsvci_is_valid = 1;
/* before RESET procedure: BLOCKED and DEAD */
nsvc->state = NSE_S_BLOCKED;
nsvc->nsi = nsi;
@@ -224,6 +229,20 @@ static void ns_osmo_signal_dispatch(struct gprs_nsvc *nsvc, unsigned int signal,
osmo_signal_dispatch(SS_L_NS, signal, &nssd);
}
+static void ns_osmo_signal_dispatch_mismatch(struct gprs_nsvc *nsvc,
+ struct msgb *msg,
+ uint8_t pdu_type, uint8_t ie_type)
+{
+ struct ns_signal_data nssd = {0};
+
+ nssd.nsvc = nsvc;
+ nssd.pdu_type = pdu_type;
+ nssd.ie_type = ie_type;
+ nssd.msg = msg;
+
+ osmo_signal_dispatch(SS_L_NS, S_NS_MISMATCH, &nssd);
+}
+
static void ns_osmo_signal_dispatch_replaced(struct gprs_nsvc *nsvc, struct gprs_nsvc *old_nsvc)
{
struct ns_signal_data nssd = {0};
@@ -322,6 +341,8 @@ int gprs_ns_tx_reset(struct gprs_nsvc *nsvc, uint8_t cause)
LOGP(DNS, LOGL_INFO, "NSEI=%u Tx NS RESET (NSVCI=%u, cause=%s)\n",
nsvc->nsei, nsvc->nsvci, gprs_ns_cause_str(cause));
+ nsvc->state |= NSE_S_RESET;
+
msg->l2h = msgb_put(msg, sizeof(*nsh));
nsh = (struct gprs_ns_hdr *) msg->l2h;
nsh->pdu_type = NS_PDUT_RESET;
@@ -671,6 +692,49 @@ static int gprs_ns_rx_status(struct gprs_nsvc *nsvc, struct msgb *msg)
return 0;
}
+/* Replace a nsvc object with another based on NSVCI.
+ * This function replaces looks for a NSVC with the given NSVCI and replaces it
+ * if possible and necessary. If replaced, the former value of *nsvc is
+ * returned in *old_nsvc.
+ * \return != 0 if *nsvc points to a matching NSVC.
+ */
+static int gprs_nsvc_replace_if_found(uint16_t nsvci,
+ struct gprs_nsvc **nsvc,
+ struct gprs_nsvc **old_nsvc)
+{
+ struct gprs_nsvc *matching_nsvc;
+
+ if ((*nsvc)->nsvci == nsvci) {
+ *old_nsvc = NULL;
+ return 1;
+ }
+
+ matching_nsvc = gprs_nsvc_by_nsvci((*nsvc)->nsi, nsvci);
+
+ if (!matching_nsvc)
+ return 0;
+
+ /* The NS-VCI is already used by this NS-VC */
+
+ char *old_peer;
+
+ /* Exchange the NS-VC objects */
+ *old_nsvc = *nsvc;
+ *nsvc = matching_nsvc;
+
+ /* Do logging */
+ old_peer = talloc_strdup(*old_nsvc, gprs_ns_ll_str(*old_nsvc));
+ LOGP(DNS, LOGL_INFO, "NS-VC changed link (NSVCI=%u) from %s to %s\n",
+ nsvci, old_peer, gprs_ns_ll_str(*nsvc));
+
+ talloc_free(old_peer);
+
+ /* Do statistics */
+ rate_ctr_inc(&(*nsvc)->ctrg->ctr[NS_CTR_REPLACED]);
+
+ return 1;
+}
+
/* Section 7.3 */
static int gprs_ns_rx_reset(struct gprs_nsvc **nsvc, struct msgb *msg)
{
@@ -678,7 +742,7 @@ static int gprs_ns_rx_reset(struct gprs_nsvc **nsvc, struct msgb *msg)
struct tlv_parsed tp;
uint8_t cause;
uint16_t nsvci, nsei;
- struct gprs_nsvc *other_nsvc = NULL;
+ struct gprs_nsvc *orig_nsvc = NULL;
int rc;
rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data,
@@ -705,39 +769,42 @@ static int gprs_ns_rx_reset(struct gprs_nsvc **nsvc, struct msgb *msg)
(*nsvc)->nsvci, (*nsvc)->nsvci_is_valid ? "" : "(invalid)",
nsei, nsvci, gprs_ns_cause_str(cause));
- if ((*nsvc)->nsvci_is_valid && (*nsvc)->nsvci != nsvci) {
- /* NS-VCI has changed */
- other_nsvc = gprs_nsvc_by_nsvci((*nsvc)->nsi, nsvci);
-
- if (other_nsvc) {
- /* The NS-VCI is already used by this NS-VC */
-
- struct gprs_nsvc *tmp_nsvc;
- char *old_peer;
-
- /* Exchange the NS-VC objects */
- tmp_nsvc = *nsvc;
- *nsvc = other_nsvc;
- other_nsvc = tmp_nsvc;
-
- /* Do logging */
- old_peer = talloc_strdup(other_nsvc,
- gprs_ns_ll_str(other_nsvc));
- LOGP(DNS, LOGL_INFO,
- "NS-VC changed link (NSVCI=%u) from %s to %s\n",
- nsvci, old_peer, gprs_ns_ll_str(*nsvc));
-
- talloc_free(old_peer);
-
- /* Do statistics */
- rate_ctr_inc(&(*nsvc)->ctrg->ctr[NS_CTR_REPLACED]);
+ if (!(*nsvc)->nsvci_is_valid) {
+ /* It's a new uninitialised NS-VC, nothing to check here */
+ } else if ((*nsvc)->nsvci != nsvci) {
+ if ((*nsvc)->remote_end_is_sgsn) {
+ /* The incoming RESET doesn't match the NSVCI. Send an
+ * appropriate RESET_ACK and ignore the RESET.
+ * See 3GPP TS 08.16, 7.3.1, 2nd paragraph.
+ */
+ ns_osmo_signal_dispatch_mismatch(*nsvc, msg,
+ NS_PDUT_RESET,
+ NS_IE_VCI);
+ rate_ctr_inc(&(*nsvc)->ctrg->ctr[NS_CTR_INV_VCI]);
+ gprs_ns_tx_reset_ack(*nsvc);
+ return 0;
}
+
+ /* NS-VCI has changed */
+ gprs_nsvc_replace_if_found(nsvci, nsvc, &orig_nsvc);
+
+ } else if ((*nsvc)->nsei != nsei) {
+ /* The incoming RESET doesn't match the NSEI. Send an
+ * appropriate RESET_ACK and ignore the RESET.
+ * See 3GPP TS 08.16, 7.3.1, 3rd paragraph.
+ */
+ ns_osmo_signal_dispatch_mismatch(*nsvc, msg,
+ NS_PDUT_RESET,
+ NS_IE_NSEI);
+ rate_ctr_inc(&(*nsvc)->ctrg->ctr[NS_CTR_INV_NSEI]);
+ gprs_ns_tx_reset_ack(*nsvc);
+ return 0;
}
/* Mark NS-VC as blocked and alive */
(*nsvc)->state = NSE_S_BLOCKED | NSE_S_ALIVE;
- if (other_nsvc) {
+ if (orig_nsvc) {
/* Check NSEI */
if ((*nsvc)->nsei != nsei) {
LOGP(DNS, LOGL_NOTICE,
@@ -751,11 +818,11 @@ static int gprs_ns_rx_reset(struct gprs_nsvc **nsvc, struct msgb *msg)
rate_ctr_inc(&(*nsvc)->ctrg->ctr[NS_CTR_NSEI_CHG]);
}
- ns_osmo_signal_dispatch_replaced(*nsvc, other_nsvc);
+ ns_osmo_signal_dispatch_replaced(*nsvc, orig_nsvc);
/* Update the ll info fields */
- gprs_ns_ll_copy(*nsvc, other_nsvc);
- gprs_ns_ll_clear(other_nsvc);
+ gprs_ns_ll_copy(*nsvc, orig_nsvc);
+ gprs_ns_ll_clear(orig_nsvc);
} else {
(*nsvc)->nsei = nsei;
(*nsvc)->nsvci = nsvci;
@@ -775,6 +842,121 @@ static int gprs_ns_rx_reset(struct gprs_nsvc **nsvc, struct msgb *msg)
return rc;
}
+static int gprs_ns_rx_reset_ack(struct gprs_nsvc **nsvc, struct msgb *msg)
+{
+ struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h;
+ struct tlv_parsed tp;
+ uint16_t nsvci, nsei;
+ struct gprs_nsvc *orig_nsvc = NULL;
+ int rc;
+
+ rc = tlv_parse(&tp, &ns_att_tlvdef, nsh->data,
+ msgb_l2len(msg) - sizeof(*nsh), 0, 0);
+ if (rc < 0) {
+ LOGP(DNS, LOGL_ERROR, "NSEI=%u Rx NS RESET ACK "
+ "Error during TLV Parse\n", (*nsvc)->nsei);
+ return rc;
+ }
+
+ if (!TLVP_PRESENT(&tp, NS_IE_VCI) ||
+ !TLVP_PRESENT(&tp, NS_IE_NSEI)) {
+ LOGP(DNS, LOGL_ERROR, "NS RESET ACK Missing mandatory IE\n");
+ gprs_ns_tx_status(*nsvc, NS_CAUSE_MISSING_ESSENT_IE, 0, msg);
+ return -EINVAL;
+ }
+
+ nsvci = ntohs(*(uint16_t *) TLVP_VAL(&tp, NS_IE_VCI));
+ nsei = ntohs(*(uint16_t *) TLVP_VAL(&tp, NS_IE_NSEI));
+
+ LOGP(DNS, LOGL_INFO, "NSVCI=%u%s Rx NS RESET ACK (NSEI=%u, NSVCI=%u)\n",
+ (*nsvc)->nsvci, (*nsvc)->nsvci_is_valid ? "" : "(invalid)",
+ nsei, nsvci);
+
+ if (!((*nsvc)->state & NSE_S_RESET)) {
+ /* Not waiting for a RESET_ACK on this NS-VC, ignore it.
+ * See 3GPP TS 08.16, 7.3.1, 5th paragraph.
+ */
+ LOGP(DNS, LOGL_ERROR,
+ "NS RESET ACK Discarding unexpected message for "
+ "NS-VCI %d from SGSN NSEI=%d\n",
+ nsvci, nsei);
+ return 0;
+ }
+
+ if (!(*nsvc)->nsvci_is_valid) {
+ LOGP(DNS, LOGL_NOTICE,
+ "NS RESET ACK Uninitialised NS-VC (%u) for "
+ "NS-VCI %d, NSEI=%d from %s\n",
+ (*nsvc)->nsvci, nsvci, nsei, gprs_ns_ll_str(*nsvc));
+ return -EINVAL;
+ }
+
+ if ((*nsvc)->nsvci != nsvci) {
+ /* NS-VCI has changed */
+
+ /* if !0, use another NSVC object that matches the NSVCI */
+ int use_other_nsvc;
+
+ /* Only do this with BSS peers */
+ use_other_nsvc = !(*nsvc)->remote_end_is_sgsn;
+
+ if (use_other_nsvc)
+ /* Update *nsvc to point to the right NSVC object */
+ use_other_nsvc = gprs_nsvc_replace_if_found(nsvci, nsvc,
+ &orig_nsvc);
+
+ if (!use_other_nsvc) {
+ /* The incoming RESET_ACK doesn't match the NSVCI.
+ * See 3GPP TS 08.16, 7.3.1, 4th paragraph.
+ */
+ ns_osmo_signal_dispatch_mismatch(*nsvc, msg,
+ NS_PDUT_RESET_ACK,
+ NS_IE_VCI);
+ rate_ctr_inc(&(*nsvc)->ctrg->ctr[NS_CTR_INV_VCI]);
+ LOGP(DNS, LOGL_ERROR,
+ "NS RESET ACK Unknown NS-VCI %d (%s NSEI=%d) "
+ "from %s\n",
+ nsvci,
+ (*nsvc)->remote_end_is_sgsn ? "SGSN" : "BSS",
+ nsei, gprs_ns_ll_str(*nsvc));
+ return -EINVAL;
+ }
+
+ /* Notify others */
+ ns_osmo_signal_dispatch_replaced(*nsvc, orig_nsvc);
+
+ /* Update the ll info fields */
+ gprs_ns_ll_copy(*nsvc, orig_nsvc);
+ gprs_ns_ll_clear(orig_nsvc);
+ } else if ((*nsvc)->nsei != nsei) {
+ /* The incoming RESET_ACK doesn't match the NSEI.
+ * See 3GPP TS 08.16, 7.3.1, 4th paragraph.
+ */
+ ns_osmo_signal_dispatch_mismatch(*nsvc, msg,
+ NS_PDUT_RESET_ACK,
+ NS_IE_NSEI);
+ rate_ctr_inc(&(*nsvc)->ctrg->ctr[NS_CTR_INV_NSEI]);
+ LOGP(DNS, LOGL_ERROR,
+ "NS RESET ACK Unknown NSEI %d (NS-VCI=%u) from %s\n",
+ nsei, nsvci, gprs_ns_ll_str(*nsvc));
+ return -EINVAL;
+ }
+
+ /* Mark NS-VC as blocked and alive */
+ (*nsvc)->state = NSE_S_BLOCKED | NSE_S_ALIVE;
+ (*nsvc)->remote_state = NSE_S_BLOCKED | NSE_S_ALIVE;
+ rate_ctr_inc(&(*nsvc)->ctrg->ctr[NS_CTR_BLOCKED]);
+ if ((*nsvc)->persistent || (*nsvc)->remote_end_is_sgsn) {
+ /* stop RESET timer */
+ osmo_timer_del(&(*nsvc)->timer);
+ }
+ /* Initiate TEST proc.: Send ALIVE and start timer */
+ rc = gprs_ns_tx_simple(*nsvc, NS_PDUT_ALIVE);
+ nsvc_start_timer(*nsvc, NSVC_TIMER_TNS_TEST);
+
+ return rc;
+}
+
static int gprs_ns_rx_block(struct gprs_nsvc *nsvc, struct msgb *msg)
{
struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h;
@@ -943,6 +1125,7 @@ int gprs_ns_vc_create(struct gprs_ns_inst *nsi, struct msgb *msg,
"from %s for non-existing NS-VC\n",
nsh->pdu_type, gprs_ns_ll_str(fallback_nsvc));
fallback_nsvc->nsvci = fallback_nsvc->nsei = 0xfffe;
+ fallback_nsvc->nsvci_is_valid = 0;
fallback_nsvc->state = NSE_S_ALIVE;
rc = gprs_ns_tx_status(fallback_nsvc,
@@ -1056,18 +1239,7 @@ int gprs_ns_process_msg(struct gprs_ns_inst *nsi, struct msgb *msg,
rc = gprs_ns_rx_reset(nsvc, msg);
break;
case NS_PDUT_RESET_ACK:
- LOGP(DNS, LOGL_INFO, "NSEI=%u Rx NS RESET ACK\n", (*nsvc)->nsei);
- /* mark NS-VC as blocked + active */
- (*nsvc)->state = NSE_S_BLOCKED | NSE_S_ALIVE;
- (*nsvc)->remote_state = NSE_S_BLOCKED | NSE_S_ALIVE;
- rate_ctr_inc(&(*nsvc)->ctrg->ctr[NS_CTR_BLOCKED]);
- if ((*nsvc)->persistent || (*nsvc)->remote_end_is_sgsn) {
- /* stop RESET timer */
- osmo_timer_del(&(*nsvc)->timer);
- }
- /* Initiate TEST proc.: Send ALIVE and start timer */
- rc = gprs_ns_tx_simple(*nsvc, NS_PDUT_ALIVE);
- nsvc_start_timer(*nsvc, NSVC_TIMER_TNS_TEST);
+ rc = gprs_ns_rx_reset_ack(nsvc, msg);
break;
case NS_PDUT_UNBLOCK:
/* Section 7.2: unblocking procedure */
@@ -1322,6 +1494,7 @@ struct gprs_nsvc *gprs_ns_nsip_connect(struct gprs_ns_inst *nsi,
nsvc->ip.bts_addr = *dest;
nsvc->nsei = nsei;
nsvc->nsvci = nsvci;
+ nsvc->nsvci_is_valid = 1;
nsvc->remote_end_is_sgsn = 1;
gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
diff --git a/tests/gb/gprs_ns_test.c b/tests/gb/gprs_ns_test.c
index df7f18b..d2d2825 100644
--- a/tests/gb/gprs_ns_test.c
+++ b/tests/gb/gprs_ns_test.c
@@ -356,6 +356,12 @@ static int test_signal(unsigned int subsys, unsigned int signal,
gprs_ns_ll_str(nssd->old_nsvc));
break;
+ case S_NS_MISMATCH:
+ printf("==> got signal NS_MISMATCH: 0x%04x/%s pdu=%d, ie=%d\n",
+ nssd->nsvc->nsvci, gprs_ns_ll_str(nssd->nsvc),
+ nssd->pdu_type, nssd->ie_type);
+ break;
+
default:
printf("==> got signal %d, NS-VC 0x%04x/%s\n", signal,
nssd->nsvc->nsvci,
diff --git a/tests/gb/gprs_ns_test.ok b/tests/gb/gprs_ns_test.ok
index ddd0b00..b3c3236 100644
--- a/tests/gb/gprs_ns_test.ok
+++ b/tests/gb/gprs_ns_test.ok
@@ -254,35 +254,21 @@ MESSAGE to BSS, msg length 12
PROCESSING RESET_ACK from 0x01020304:2222
03 01 82 10 01 04 82 10 00
+==> got signal NS_REPLACED: 0x1001/1.2.3.4:1111 -> 0x2001/1.2.3.4:2222
MESSAGE to BSS, msg length 1
0a
result (RESET_ACK) = 1
Current NS-VCIs:
- VCI 0x2001, NSEI 0x2000, peer 0x01020304:2222, blocked
- NS-VC Block count : 1
- VCI 0x1001, NSEI 0x1000, peer 0x01020304:1111, blocked
- NS-VC Block count : 1
+ VCI 0x2001, NSEI 0x2000, peer 0x00000000:0
+ VCI 0x1001, NSEI 0x1000, peer 0x01020304:2222, blocked
+ NS-VC Block count : 2
+ NS-VC replaced other count: 1
--- Setup VC 2 SGSN -> BSS (hits NSEI 2) ---
-MESSAGE to BSS, msg length 12
-02 00 81 01 01 82 20 01 04 82 20 00
-
-PROCESSING RESET_ACK from 0x01020304:1111
-03 01 82 20 01 04 82 20 00
-
-MESSAGE to BSS, msg length 1
-0a
-
-result (RESET_ACK) = 1
-
-Current NS-VCIs:
- VCI 0x2001, NSEI 0x2000, peer 0x01020304:2222, blocked
- NS-VC Block count : 1
- VCI 0x1001, NSEI 0x1000, peer 0x01020304:1111, blocked
- NS-VC Block count : 2
+Failed to send RESET to 0.0.0.0:0
--- Setup VC 1 SGSN -> BSS (hits NSEI 1) ---
@@ -298,10 +284,10 @@ MESSAGE to BSS, msg length 1
result (RESET_ACK) = 1
Current NS-VCIs:
- VCI 0x2001, NSEI 0x2000, peer 0x01020304:2222, blocked
- NS-VC Block count : 2
- VCI 0x1001, NSEI 0x1000, peer 0x01020304:1111, blocked
- NS-VC Block count : 2
+ VCI 0x2001, NSEI 0x2000, peer 0x00000000:0
+ VCI 0x1001, NSEI 0x1000, peer 0x01020304:2222, blocked
+ NS-VC Block count : 3
+ NS-VC replaced other count: 1
--- Setup VC 2 BSS -> SGSN ---
@@ -310,7 +296,6 @@ Setup NS-VC: remote 0x01020304:1111, NSVCI 0x2001(8193), NSEI 0x2000(8192)
PROCESSING RESET from 0x01020304:1111
02 00 81 01 01 82 20 01 04 82 20 00
-==> got signal NS_REPLACED: 0x2001/1.2.3.4:2222 -> 0x1001/1.2.3.4:1111
==> got signal NS_RESET, NS-VC 0x2001/1.2.3.4:1111
MESSAGE to BSS, msg length 9
03 01 82 20 01 04 82 20 00
@@ -344,61 +329,59 @@ result (ALIVE_ACK) = 0
Current NS-VCIs:
VCI 0x2001, NSEI 0x2000, peer 0x01020304:1111
- NS-VC Block count : 2
+ VCI 0x1001, NSEI 0x1000, peer 0x01020304:2222, blocked
+ NS-VC Block count : 3
NS-VC replaced other count: 1
- VCI 0x1001, NSEI 0x1000, peer 0x00000000:0, blocked
- NS-VC Block count : 2
--- Unexpected RESET_ACK VC 1, BSS -> SGSN ---
PROCESSING RESET_ACK from 0x01020304:2222
03 01 82 10 01 04 82 10 00
-MESSAGE to BSS, msg length 15
-08 00 81 0a 02 89 03 01 82 10 01 04 82 10 00
-
result (RESET_ACK) = 0
Current NS-VCIs:
VCI 0x2001, NSEI 0x2000, peer 0x01020304:1111
- NS-VC Block count : 2
+ VCI 0x1001, NSEI 0x1000, peer 0x01020304:2222, blocked
+ NS-VC Block count : 3
NS-VC replaced other count: 1
- VCI 0x1001, NSEI 0x1000, peer 0x00000000:0, blocked
- NS-VC Block count : 2
--- RESET_ACK with invalid NSEI, BSS -> SGSN ---
+MESSAGE to BSS, msg length 12
+02 00 81 01 01 82 10 01 04 82 10 00
+
PROCESSING RESET_ACK from 0x01020304:2222
03 01 82 10 01 04 82 f0 00
-MESSAGE to BSS, msg length 15
-08 00 81 0a 02 89 03 01 82 10 01 04 82 f0 00
-
-result (RESET_ACK) = 0
+==> got signal NS_MISMATCH: 0x1001/1.2.3.4:2222 pdu=3, ie=4
+result (RESET_ACK) = -22
Current NS-VCIs:
VCI 0x2001, NSEI 0x2000, peer 0x01020304:1111
- NS-VC Block count : 2
+ VCI 0x1001, NSEI 0x1000, peer 0x01020304:2222, blocked
+ NS-VC Block count : 3
NS-VC replaced other count: 1
- VCI 0x1001, NSEI 0x1000, peer 0x00000000:0, blocked
- NS-VC Block count : 2
+ NSEI was invalid count : 1
--- RESET_ACK with invalid NSVCI, BSS -> SGSN ---
+MESSAGE to BSS, msg length 12
+02 00 81 01 01 82 10 01 04 82 10 00
+
PROCESSING RESET_ACK from 0x01020304:2222
03 01 82 f0 01 04 82 10 00
-MESSAGE to BSS, msg length 15
-08 00 81 0a 02 89 03 01 82 f0 01 04 82 10 00
-
-result (RESET_ACK) = 0
+==> got signal NS_MISMATCH: 0x1001/1.2.3.4:2222 pdu=3, ie=1
+result (RESET_ACK) = -22
Current NS-VCIs:
VCI 0x2001, NSEI 0x2000, peer 0x01020304:1111
- NS-VC Block count : 2
+ VCI 0x1001, NSEI 0x1000, peer 0x01020304:2222, blocked
+ NS-VC Block count : 3
NS-VC replaced other count: 1
- VCI 0x1001, NSEI 0x1000, peer 0x00000000:0, blocked
- NS-VC Block count : 2
+ NS-VCI was invalid count : 1
+ NSEI was invalid count : 1
Current NS-VCIs:
@@ -456,36 +439,33 @@ Current NS-VCIs:
PROCESSING RESET from 0x05060708:32000
02 00 81 01 01 82 01 01 04 82 f0 00
-==> got signal NS_RESET, NS-VC 0x0101/5.6.7.8:32000
+==> got signal NS_MISMATCH: 0x0101/5.6.7.8:32000 pdu=2, ie=4
MESSAGE to SGSN, msg length 9
-03 01 82 01 01 04 82 f0 00
-
-MESSAGE to SGSN, msg length 1
-0a
+03 01 82 01 01 04 82 01 00
-result (RESET) = 9
+result (RESET) = 0
Current NS-VCIs:
- VCI 0x0101, NSEI 0xf000, peer 0x05060708:32000, blocked
+ VCI 0x0101, NSEI 0x0100, peer 0x05060708:32000, blocked
NS-VC Block count : 1
+ NSEI was invalid count : 1
--- RESET with invalid NSVCI, SGSN -> BSS ---
PROCESSING RESET from 0x05060708:32000
02 00 81 01 01 82 f0 01 04 82 01 00
-==> got signal NS_RESET, NS-VC 0xf001/5.6.7.8:32000
+==> got signal NS_MISMATCH: 0x0101/5.6.7.8:32000 pdu=2, ie=1
MESSAGE to SGSN, msg length 9
-03 01 82 f0 01 04 82 01 00
-
-MESSAGE to SGSN, msg length 1
-0a
+03 01 82 01 01 04 82 01 00
-result (RESET) = 9
+result (RESET) = 0
Current NS-VCIs:
- VCI 0xf001, NSEI 0x0100, peer 0x05060708:32000, blocked
+ VCI 0x0101, NSEI 0x0100, peer 0x05060708:32000, blocked
NS-VC Block count : 1
+ NS-VCI was invalid count : 1
+ NSEI was invalid count : 1
Current NS-VCIs:
--
1.7.9.5