diff options
| author | Daniel Willmann <dwillmann@sysmocom.de> | 2021-01-17 13:40:38 +0100 |
|---|---|---|
| committer | Daniel Willmann <dwillmann@sysmocom.de> | 2021-01-17 13:51:57 +0100 |
| commit | 5b1122f717df5f5ee39b127d332c63e07f5fb473 (patch) | |
| tree | 5487ce2af868d963b5a6ffe8a1576e94ce3e78ff /src | |
| parent | 914484d561c66e9ecdaf292f6af4d8879cac7b66 (diff) | |
gbproxy: Use IMSI cache to handle PAGING_PS_REJECT
Diffstat (limited to 'src')
| -rw-r--r-- | src/gbproxy/gb_proxy.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/gbproxy/gb_proxy.c b/src/gbproxy/gb_proxy.c index d8bca582f..44a9008ca 100644 --- a/src/gbproxy/gb_proxy.c +++ b/src/gbproxy/gb_proxy.c @@ -934,6 +934,20 @@ static int gbprox_rx_sig_from_bss(struct gbproxy_nse *nse, struct msgb *msg, uin goto err_no_bvc; gbprox_bss2sgsn_tlli(from_bvc->cell, msg, &tlli, true); break; + case BSSGP_PDUT_PAGING_PS_REJECT: + { + /* Route according to IMSI<->NSE cache entry */ + struct osmo_mobile_identity mi; + const uint8_t *mi_data = TLVP_VAL(&tp, BSSGP_IE_IMSI); + uint8_t mi_len = TLVP_LEN(&tp, BSSGP_IE_IMSI); + osmo_mobile_identity_decode(&mi, mi_data, mi_len, false); + nse = gbproxy_nse_by_imsi(nse->cfg, mi.imsi); + if (!nse) { + return bssgp_tx_status(BSSGP_CAUSE_INV_MAND_INF, NULL, msg); + } + rc = gbprox_relay2nse(msg, nse, 0); + break; + } default: LOGPNSE(nse, LOGL_ERROR, "Rx %s: Implementation missing\n", pdut_name); break; @@ -1135,6 +1149,15 @@ static int gbprox_rx_sig_from_sgsn(struct gbproxy_nse *nse, struct msgb *msg, ui rc = gbprox_relay2peer(msg, sgsn_bvc->cell->bss_bvc, ns_bvci); break; case BSSGP_PDUT_PAGING_PS: + { + /* Cache the IMSI<->NSE to route PAGING REJECT */ + struct osmo_mobile_identity mi; + const uint8_t *mi_data = TLVP_VAL(&tp, BSSGP_IE_IMSI); + uint8_t mi_len = TLVP_LEN(&tp, BSSGP_IE_IMSI); + osmo_mobile_identity_decode(&mi, mi_data, mi_len, false); + gbproxy_imsi_cache_update(nse, mi.imsi); + /* fall through */ + } case BSSGP_PDUT_PAGING_CS: /* process the paging request (LAI/RAI lookup) */ rc = gbprox_rx_paging(nse, msg, pdut_name, &tp, ns_bvci); |