diff options
Diffstat (limited to 'openbsc/src/gprs/gprs_llc.c')
| -rw-r--r-- | openbsc/src/gprs/gprs_llc.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/openbsc/src/gprs/gprs_llc.c b/openbsc/src/gprs/gprs_llc.c index c88d16269..0b4613e0f 100644 --- a/openbsc/src/gprs/gprs_llc.c +++ b/openbsc/src/gprs/gprs_llc.c @@ -608,8 +608,19 @@ int gprs_llc_rcvmsg(struct msgb *msg, struct tlv_parsed *tv) /* find the LLC Entity for this TLLI+SAPI tuple */ lle = lle_for_rx_by_tlli_sapi(msgb_tlli(msg), llhp.sapi, llhp.cmd); - if (!lle) + if (!lle) { + switch (llhp.sapi) { + case GPRS_SAPI_SNDCP3: + case GPRS_SAPI_SNDCP5: + case GPRS_SAPI_SNDCP9: + case GPRS_SAPI_SNDCP11: + /* Ask an upper layer for help. */ + return sgsn_force_reattach_oldmsg(msg); + default: + break; + } return 0; + } /* decrypt information field + FCS, if needed! */ if (llhp.is_encrypted) { @@ -773,6 +784,25 @@ int gprs_llgmm_reset(struct gprs_llc_llme *llme) return gprs_llc_tx_xid(lle, msg, 1); } +int gprs_llgmm_reset_oldmsg(struct msgb* oldmsg, uint8_t sapi) +{ + struct msgb *msg = msgb_alloc_headroom(4096, 1024, "LLC_XID"); + int random = rand(); + + /* First XID component must be RESET */ + msgb_put_xid_par(msg, GPRS_LLC_XID_T_RESET, 0, NULL); + /* randomly select new IOV-UI */ + msgb_put_xid_par(msg, GPRS_LLC_XID_T_IOV_UI, 4, (uint8_t *) &random); + + /* FIXME: Start T200, wait for XID response */ + + msgb_tlli(msg) = msgb_tlli(oldmsg); + msgb_bvci(msg) = msgb_bvci(oldmsg); + msgb_nsei(msg) = msgb_nsei(oldmsg); + + return gprs_llc_tx_u(msg, sapi, 1, GPRS_LLC_U_XID, 1); +} + int gprs_llc_init(const char *cipher_plugin_path) { return gprs_cipher_load(cipher_plugin_path); |