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-rw-r--r--openbsc/src/gprs/gb_proxy.c42
-rw-r--r--openbsc/src/gprs/gprs_gb_parse.c20
2 files changed, 44 insertions, 18 deletions
diff --git a/openbsc/src/gprs/gb_proxy.c b/openbsc/src/gprs/gb_proxy.c
index dfceabea0..280c55707 100644
--- a/openbsc/src/gprs/gb_proxy.c
+++ b/openbsc/src/gprs/gb_proxy.c
@@ -448,6 +448,8 @@ static int gbprox_rx_ptp_from_sgsn(struct gbproxy_config *cfg,
peer = gbproxy_peer_by_bvci(cfg, ns_bvci);
+ /* Send status messages before patching */
+
if (!peer) {
LOGP(DGPRS, LOGL_INFO, "Didn't find peer for "
"BVCI=%u for message from NSVC=%u/NSEI=%u (SGSN)\n",
@@ -466,6 +468,9 @@ static int gbprox_rx_ptp_from_sgsn(struct gbproxy_config *cfg,
return bssgp_tx_status(BSSGP_CAUSE_BVCI_BLOCKED, NULL, msg);
}
+ /* Optionally patch the message */
+ gbprox_process_bssgp_dl(cfg, msg, peer);
+
return gbprox_relay2peer(msg, peer, ns_bvci);
}
@@ -621,6 +626,7 @@ static int gbprox_rx_paging(struct gbproxy_config *cfg, struct msgb *msg, struct
/* Receive an incoming BVC-RESET message from the SGSN */
static int rx_reset_from_sgsn(struct gbproxy_config *cfg,
+ struct msgb *orig_msg,
struct msgb *msg, struct tlv_parsed *tp,
uint32_t nsei, uint16_t ns_bvci)
{
@@ -631,7 +637,7 @@ static int rx_reset_from_sgsn(struct gbproxy_config *cfg,
rate_ctr_inc(&cfg->ctrg->
ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]);
return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE,
- NULL, msg);
+ NULL, orig_msg);
}
ptp_bvci = ntohs(tlvp_val16_unal(tp, BSSGP_IE_BVCI));
@@ -645,7 +651,7 @@ static int rx_reset_from_sgsn(struct gbproxy_config *cfg,
rate_ctr_inc(&cfg->ctrg->
ctr[GBPROX_GLOB_CTR_INV_BVCI]);
return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI,
- NULL, msg);
+ NULL, orig_msg);
}
return gbprox_relay2peer(msg, peer, ns_bvci);
}
@@ -662,15 +668,17 @@ static int rx_reset_from_sgsn(struct gbproxy_config *cfg,
/* Receive an incoming signalling message from the SGSN-side NS-VC */
static int gbprox_rx_sig_from_sgsn(struct gbproxy_config *cfg,
- struct msgb *msg, uint32_t nsei,
+ struct msgb *orig_msg, uint32_t nsei,
uint16_t ns_bvci)
{
- struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
+ struct bssgp_normal_hdr *bgph =
+ (struct bssgp_normal_hdr *) msgb_bssgph(orig_msg);
struct tlv_parsed tp;
uint8_t pdu_type = bgph->pdu_type;
- int data_len = msgb_bssgp_len(msg) - sizeof(*bgph);
+ int data_len;
struct gbproxy_peer *peer;
uint16_t bvci;
+ struct msgb *msg;
int rc = 0;
if (ns_bvci != 0 && ns_bvci != 1) {
@@ -686,14 +694,19 @@ static int gbprox_rx_sig_from_sgsn(struct gbproxy_config *cfg,
pdu_type == BSSGP_PDUT_DL_UNITDATA) {
LOGP(DGPRS, LOGL_NOTICE, "NSEI=%u(SGSN) UNITDATA not allowed in "
"signalling\n", nsei);
- return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
+ return bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg);
}
+ msg = gprs_msgb_copy(orig_msg, "rx_sig_from_sgsn");
+ gbprox_process_bssgp_dl(cfg, msg, NULL);
+ /* Update message info */
+ bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
+ data_len = msgb_bssgp_len(orig_msg) - sizeof(*bgph);
rc = bssgp_tlv_parse(&tp, bgph->data, data_len);
switch (pdu_type) {
case BSSGP_PDUT_BVC_RESET:
- rc = rx_reset_from_sgsn(cfg, msg, &tp, nsei, ns_bvci);
+ rc = rx_reset_from_sgsn(cfg, msg, orig_msg, &tp, nsei, ns_bvci);
break;
case BSSGP_PDUT_FLUSH_LL:
case BSSGP_PDUT_BVC_RESET_ACK:
@@ -762,29 +775,33 @@ static int gbprox_rx_sig_from_sgsn(struct gbproxy_config *cfg,
"NSEI=%u(SGSN) BSSGP INVOKE TRACE not supported\n",nsei);
rate_ctr_inc(&cfg->ctrg->
ctr[GBPROX_GLOB_CTR_NOT_SUPPORTED_SGSN]);
- rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, msg);
+ rc = bssgp_tx_status(BSSGP_CAUSE_PDU_INCOMP_FEAT, NULL, orig_msg);
break;
default:
LOGP(DGPRS, LOGL_NOTICE, "BSSGP PDU type 0x%02x unknown\n",
pdu_type);
rate_ctr_inc(&cfg->ctrg->
ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]);
- rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg);
+ rc = bssgp_tx_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, orig_msg);
break;
}
+ msgb_free(msg);
+
return rc;
err_mand_ie:
LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) missing mandatory IE\n",
nsei);
rate_ctr_inc(&cfg->ctrg->
ctr[GBPROX_GLOB_CTR_PROTO_ERR_SGSN]);
- return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, msg);
+ msgb_free(msg);
+ return bssgp_tx_status(BSSGP_CAUSE_MISSING_MAND_IE, NULL, orig_msg);
err_no_peer:
LOGP(DGPRS, LOGL_ERROR, "NSEI=%u(SGSN) cannot find peer based on RAI\n",
nsei);
rate_ctr_inc(&cfg->ctrg-> ctr[GBPROX_GLOB_CTR_INV_RAI]);
- return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, msg);
+ msgb_free(msg);
+ return bssgp_tx_status(BSSGP_CAUSE_UNKNOWN_BVCI, NULL, orig_msg);
}
/* Main input function for Gb proxy */
@@ -794,9 +811,6 @@ int gbprox_rcvmsg(struct gbproxy_config *cfg, struct msgb *msg, uint16_t nsei,
int rc;
int remote_end_is_sgsn = nsei == cfg->nsip_sgsn_nsei;
- if (remote_end_is_sgsn)
- gbprox_process_bssgp_dl(cfg, msg, NULL);
-
/* Only BVCI=0 messages need special treatment */
if (ns_bvci == 0 || ns_bvci == 1) {
if (remote_end_is_sgsn)
diff --git a/openbsc/src/gprs/gprs_gb_parse.c b/openbsc/src/gprs/gprs_gb_parse.c
index f2ab20075..ef4a4d108 100644
--- a/openbsc/src/gprs/gprs_gb_parse.c
+++ b/openbsc/src/gprs/gprs_gb_parse.c
@@ -530,10 +530,13 @@ int gprs_gb_parse_bssgp(uint8_t *bssgp, size_t bssgp_len,
parse_ctx->imsi_len = TLVP_LEN(tp, BSSGP_IE_IMSI);
}
- /* TODO: This is TLLI old, don't confuse with TLLI current, add
- * and use tlli_old_enc instead */
- if (0 && TLVP_PRESENT(tp, BSSGP_IE_TLLI))
- parse_ctx->tlli_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TLLI);
+ if (TLVP_PRESENT(tp, BSSGP_IE_TLLI)) {
+ if (parse_ctx->tlli_enc)
+ /* This is TLLI old, don't confuse it with TLLI current */
+ parse_ctx->old_tlli_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TLLI);
+ else
+ parse_ctx->tlli_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TLLI);
+ }
if (TLVP_PRESENT(tp, BSSGP_IE_TMSI) && pdu_type == BSSGP_PDUT_PAGING_PS)
parse_ctx->ptmsi_enc = (uint8_t *)TLVP_VAL(tp, BSSGP_IE_TMSI);
@@ -581,6 +584,15 @@ void gprs_gb_log_parse_context(struct gprs_gb_parse_context *parse_ctx,
sep = ",";
}
+ if (parse_ctx->old_tlli_enc) {
+ LOGP(DGPRS, LOGL_DEBUG, "%s old TLLI %02x%02x%02x%02x", sep,
+ parse_ctx->old_tlli_enc[0],
+ parse_ctx->old_tlli_enc[1],
+ parse_ctx->old_tlli_enc[2],
+ parse_ctx->old_tlli_enc[3]);
+ sep = ",";
+ }
+
if (parse_ctx->bssgp_raid_enc) {
struct gprs_ra_id raid;
gsm48_parse_ra(&raid, parse_ctx->bssgp_raid_enc);