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daniel gerrit-no-reply at lists.osmocom.orgdaniel has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-gbproxy/+/24859 ) Change subject: gbproxy: Forward MS_REGISTR_ENQ/_RESP correctly ...................................................................... gbproxy: Forward MS_REGISTR_ENQ/_RESP correctly We need to save the BSS NSE <-> IMSI mapping to correctly route the answer. Related: OS#4472 Change-Id: I1908bbe8db11271dbd3f45b0d9f1bc0bfe48f239 --- M src/gb_proxy.c 1 file changed, 39 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-gbproxy refs/changes/59/24859/1 diff --git a/src/gb_proxy.c b/src/gb_proxy.c index 8c8faf7..a80e5a9 100644 --- a/src/gb_proxy.c +++ b/src/gb_proxy.c @@ -1114,6 +1114,26 @@ rc = gbprox_relay2nse(msg, nse, 0); break; } + case BSSGP_PDUT_MS_REGISTR_ENQ: + { + struct gbproxy_sgsn *sgsn; + struct osmo_mobile_identity mi; + const uint8_t *mi_data = TLVP_VAL(&tp[0], BSSGP_IE_IMSI); + uint8_t mi_len = TLVP_LEN(&tp[0], BSSGP_IE_IMSI); + osmo_mobile_identity_decode(&mi, mi_data, mi_len, false); + + sgsn = gbproxy_select_sgsn(nse->cfg, NULL); + if (!sgsn) { + LOGP(DGPRS, LOGL_ERROR, "Could not find any SGSN, dropping message!\n"); + rc = -EINVAL; + break; + } + + gbproxy_imsi_cache_update(nse, mi.imsi); + + rc = gbprox_relay2nse(msg, sgsn->nse, 0); + break; + } default: LOGPNSE(nse, LOGL_ERROR, "Rx %s: Implementation missing\n", pdut_name); break; @@ -1444,6 +1464,25 @@ case BSSGP_PDUT_RAN_INFO_APP_ERROR: rc = gbprox_rx_rim_from_sgsn(tp, nse, msg, log_pfx, pdut_name); break; + case BSSGP_PDUT_MS_REGISTR_ENQ_RESP: + { + struct gbproxy_nse *nse_peer; + struct osmo_mobile_identity mi; + const uint8_t *mi_data = TLVP_VAL(&tp[0], BSSGP_IE_IMSI); + uint8_t mi_len = TLVP_LEN(&tp[0], BSSGP_IE_IMSI); + osmo_mobile_identity_decode(&mi, mi_data, mi_len, false); + nse_peer = gbproxy_nse_by_imsi(cfg, mi.imsi); + if (!nse_peer) { + LOGPNSE(nse, LOGL_ERROR, "Rx %s: Cannot find NSE\n", pdut_name); + return tx_status(nse, ns_bvci, BSSGP_CAUSE_INV_MAND_INF, NULL, msg); + } else if (nse_peer->sgsn_facing) { + LOGPNSE(nse, LOGL_ERROR, "Forwarding %s failed: IMSI cache contains SGSN NSE", pdut_name); + return tx_status(nse, ns_bvci, BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL, msg); + } + gbproxy_imsi_cache_remove(cfg, mi.imsi); + gbprox_relay2nse(msg, nse_peer, ns_bvci); + break; + } default: LOGPNSE(nse, LOGL_NOTICE, "Rx %s: Not supported\n", pdut_name); rate_ctr_inc(rate_ctr_group_get_ctr(cfg->ctrg, GBPROX_GLOB_CTR_PROTO_ERR_SGSN)); -- To view, visit https://gerrit.osmocom.org/c/osmo-gbproxy/+/24859 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-gbproxy Gerrit-Branch: master Gerrit-Change-Id: I1908bbe8db11271dbd3f45b0d9f1bc0bfe48f239 Gerrit-Change-Number: 24859 Gerrit-PatchSet: 1 Gerrit-Owner: daniel <dwillmann at sysmocom.de> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20210706/c572aa97/attachment.htm>