diff options
Diffstat (limited to 'openbsc/src/gprs/gb_proxy_tlli.c')
| -rw-r--r-- | openbsc/src/gprs/gb_proxy_tlli.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/openbsc/src/gprs/gb_proxy_tlli.c b/openbsc/src/gprs/gb_proxy_tlli.c index 467006e87..54e41e9e0 100644 --- a/openbsc/src/gprs/gb_proxy_tlli.c +++ b/openbsc/src/gprs/gb_proxy_tlli.c @@ -542,6 +542,30 @@ struct gbproxy_link_info *gbproxy_update_link_state_ul( return link_info; } +static struct gbproxy_link_info *gbproxy_get_link_info_dl( + struct gbproxy_peer *peer, + struct gprs_gb_parse_context *parse_ctx) +{ + struct gbproxy_link_info *link_info = NULL; + + /* Which key to use depends on its availability only, if that fails, do + * not retry it with another key (e.g. IMSI). */ + if (parse_ctx->tlli_enc) + link_info = gbproxy_link_info_by_sgsn_tlli(peer, parse_ctx->tlli, + parse_ctx->peer_nsei); + + /* TODO: Get link_info by (SGSN) P-TMSI if that is available (see + * GSM 08.18, 7.2) instead of using the IMSI as key. */ + else if (parse_ctx->imsi) + link_info = gbproxy_link_info_by_imsi( + peer, parse_ctx->imsi, parse_ctx->imsi_len); + + if (link_info) + link_info->is_deregistered = 0; + + return link_info; +} + struct gbproxy_link_info *gbproxy_update_link_state_dl( struct gbproxy_peer *peer, time_t now, @@ -549,9 +573,7 @@ struct gbproxy_link_info *gbproxy_update_link_state_dl( { struct gbproxy_link_info *link_info = NULL; - if (parse_ctx->tlli_enc) - link_info = gbproxy_link_info_by_sgsn_tlli( - peer, parse_ctx->tlli, parse_ctx->peer_nsei); + link_info = gbproxy_get_link_info_dl(peer, parse_ctx); if (parse_ctx->tlli_enc && parse_ctx->new_ptmsi_enc && link_info) { /* A new P-TMSI has been signalled in the message, |