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lynxis lazus gerrit-no-reply at lists.osmocom.orglynxis lazus has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/25558 ) Change subject: ns2: correct parse a BLOCK PDU which was received over a different NSVC ...................................................................... ns2: correct parse a BLOCK PDU which was received over a different NSVC BLOCK PDU can be send over a different NSVC than the NSVC. E.g. informing a NSVC got blocked in case of a lower-layer failure. Change-Id: I483e3a1d3b8c43bbb0cc6185b7f7f772bcb264bf --- M src/gb/gprs_ns2_vc_fsm.c 1 file changed, 33 insertions(+), 7 deletions(-) git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/58/25558/1 diff --git a/src/gb/gprs_ns2_vc_fsm.c b/src/gb/gprs_ns2_vc_fsm.c index 3395254..b528a06 100644 --- a/src/gb/gprs_ns2_vc_fsm.c +++ b/src/gb/gprs_ns2_vc_fsm.c @@ -118,6 +118,7 @@ GPRS_NS2_EV_REQ_OM_RESET, /* vty cmd: reset */ GPRS_NS2_EV_REQ_OM_BLOCK, /* vty cmd: block */ GPRS_NS2_EV_REQ_OM_UNBLOCK, /* vty cmd: unblock*/ + GPRS_NS2_EV_RX_BLOCK_FOREIGN, /* received a BLOCK over another NSVC */ }; static const struct value_string ns2_vc_event_names[] = { @@ -127,6 +128,7 @@ { GPRS_NS2_EV_RX_UNBLOCK, "RX-UNBLOCK" }, { GPRS_NS2_EV_RX_UNBLOCK_ACK, "RX-UNBLOCK_ACK" }, { GPRS_NS2_EV_RX_BLOCK, "RX-BLOCK" }, + { GPRS_NS2_EV_RX_BLOCK_FOREIGN, "RX-BLOCK_FOREIGN" }, { GPRS_NS2_EV_RX_BLOCK_ACK, "RX-BLOCK_ACK" }, { GPRS_NS2_EV_RX_ALIVE, "RX-ALIVE" }, { GPRS_NS2_EV_RX_ALIVE_ACK, "RX-ALIVE_ACK" }, @@ -368,8 +370,12 @@ osmo_timer_del(&fi->timer); break; case GPRS_NS2_EV_RX_BLOCK: + case GPRS_NS2_EV_RX_BLOCK_FOREIGN: priv->accept_unitdata = false; - ns2_tx_block_ack(priv->nsvc, NULL); + /* the BLOCK ACK for foreign BLOCK PDUs (rx over another nsvc) will be send + * from the receiving nsvc */ + if (event == GPRS_NS2_EV_RX_BLOCK) + ns2_tx_block_ack(priv->nsvc, NULL); osmo_timer_del(&fi->timer); break; case GPRS_NS2_EV_RX_UNBLOCK: @@ -380,6 +386,9 @@ } } else if (priv->initiate_block) { switch (event) { + case GPRS_NS2_EV_RX_BLOCK_FOREIGN: + /* the block ack will be send by the rx NSVC */ + break; case GPRS_NS2_EV_RX_BLOCK: /* TODO: BLOCK is a UNBLOCK_NACK */ ns2_tx_block_ack(priv->nsvc, NULL); @@ -396,6 +405,9 @@ } else { /* we are on the receiving end. The initiator who sent RESET is responsible to UNBLOCK! */ switch (event) { + case GPRS_NS2_EV_RX_BLOCK_FOREIGN: + /* the block ack will be send by the rx NSVC */ + break; case GPRS_NS2_EV_RX_BLOCK: ns2_tx_block_ack(priv->nsvc, NULL); break; @@ -438,10 +450,14 @@ case GPRS_NS2_EV_RX_UNBLOCK: ns2_tx_unblock_ack(priv->nsvc); break; + case GPRS_NS2_EV_RX_BLOCK_FOREIGN: case GPRS_NS2_EV_RX_BLOCK: priv->initiate_block = false; priv->accept_unitdata = false; - ns2_tx_block_ack(priv->nsvc, NULL); + /* the BLOCK ACK for foreign BLOCK PDUs (rx over another nsvc) will be send + * from the receiving nsvc */ + if (event == GPRS_NS2_EV_RX_BLOCK) + ns2_tx_block_ack(priv->nsvc, NULL); osmo_fsm_inst_state_chg(fi, GPRS_NS2_ST_BLOCKED, 0, 2); break; @@ -887,21 +903,26 @@ /* 48.016 § 7.3.1 send RESET_ACK to wrong NSVCI + ignore */ if (nsh->pdu_type == NS_PDUT_RESET) { ns2_tx_reset_ack(nsvc); - } else if (nsh->pdu_type == NS_PDUT_STATUS) { - /* this is a PDU received over a NSVC and reports a status for another NSVC */ + } else if (nsh->pdu_type == NS_PDUT_BLOCK || nsh->pdu_type == NS_PDUT_STATUS) { + /* this is a PDU received over a NSVC and reports a status/block for another NSVC */ target_nsvc = gprs_ns2_nsvc_by_nsvci(nsvc->nse->nsi, nsvci); if (!target_nsvc) { LOGPFSML(fi, LOGL_ERROR, "Received a STATUS PDU for unknown NSVC (NSVCI %d)\n", nsvci); + if (nsh->pdu_type == NS_PDUT_BLOCK) { + /* send out status */ + } goto out; } if (target_nsvc->nse != nsvc->nse) { LOGPFSML(fi, LOGL_ERROR, "Received a STATUS PDU for a NSVC (NSVCI %d) but it belongs to a different NSE!\n", nsvci); - /* send out status */ + if (nsh->pdu_type == NS_PDUT_BLOCK) { + /* send out status */ + } goto out; } - /* the status will be passed to the nsvc/target nsvc in the switch */ + /* the status/block will be passed to the nsvc/target nsvc in the switch */ } else { LOG_NS_SIGNAL(nsvc, "Rx", nsh->pdu_type, LOGL_ERROR, " with wrong NSVCI=%05u. Ignoring PDU.\n", nsvci); goto out; @@ -917,7 +938,12 @@ osmo_fsm_inst_dispatch(fi, GPRS_NS2_EV_RX_RESET_ACK, tp); break; case NS_PDUT_BLOCK: - osmo_fsm_inst_dispatch(fi, GPRS_NS2_EV_RX_BLOCK, tp); + if (target_nsvc) { + osmo_fsm_inst_dispatch(target_nsvc->fi, GPRS_NS2_EV_RX_BLOCK_FOREIGN, tp); + ns2_tx_block_ack(nsvc, &nsvci); + } else { + osmo_fsm_inst_dispatch(fi, GPRS_NS2_EV_RX_BLOCK, tp); + } break; case NS_PDUT_BLOCK_ACK: osmo_fsm_inst_dispatch(fi, GPRS_NS2_EV_RX_BLOCK_ACK, tp); -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/25558 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I483e3a1d3b8c43bbb0cc6185b7f7f772bcb264bf Gerrit-Change-Number: 25558 Gerrit-PatchSet: 1 Gerrit-Owner: lynxis lazus <lynxis at fe80.eu> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... 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