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[gb_proxy] Convert a NS-BLOCK from BSS into BVC-RESET to SGSN 

As we only have one NS-VC between gb_proxy and SGSN, we cannot
forward a NS-BLOCK from the BSS to the SGSN, as it would affect
all other BSS's, too.

Thus, we check if we have an unblocked PTP-BVC in the NSVC to the BSS,
and then issue a BVC-BLOCK towards the SGSN.

This should prevent any further PDU's from the SGSN to be sent to
this BSS.
This commit is contained in:
Harald Welte 2011-02-06 16:33:29 +01:00
parent 36f98d9c53
commit 5e106d7765
1 changed files with 31 additions and 12 deletions
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43
openbsc/src/gprs/gb_proxy.c
View File

@ -612,23 +612,42 @@ int gbprox_signal(unsigned int subsys, unsigned int signal,
nsvc->nsvci);
}
/* We currently only care about signals from the SGSN */
if (!nsvc->remote_end_is_sgsn)
return 0;
/* iterate over all BTS peers and send the respective PDU */
llist_for_each_entry(peer, &gbprox_bts_peers, list) {
if (!nsvc->remote_end_is_sgsn) {
/* from BSS to SGSN */
peer = peer_by_nsvc(nsvc);
if (!peer) {
LOGP(DGPRS, LOGL_NOTICE, "signal %u for unknown peer "
"NSEI=%u/NSVCI=%u\n", signal, nsvc->nsei,
nsvc->nsvci);
return 0;
}
switch (signal) {
case S_NS_RESET:
gprs_ns_tx_reset(peer->nsvc, nssd->cause);
break;
case S_NS_BLOCK:
gprs_ns_tx_block(peer->nsvc, nssd->cause);
break;
case S_NS_UNBLOCK:
gprs_ns_tx_unblock(peer->nsvc);
if (!peer->blocked)
break;
LOGP(DGPRS, LOGL_NOTICE, "Converting NS_RESET from "
"NSEI=%u/NSVCI=%u into BSSGP_BVC_BLOCK to SGSN\n",
nsvc->nsei, nsvc->nsvci);
bssgp_tx_simple_bvci(BSSGP_PDUT_BVC_BLOCK, nsvc->nsei,
peer->bvci, 0);
break;
}
} else {
/* iterate over all BTS peers and send the respective PDU */
llist_for_each_entry(peer, &gbprox_bts_peers, list) {
switch (signal) {
case S_NS_RESET:
gprs_ns_tx_reset(peer->nsvc, nssd->cause);
break;
case S_NS_BLOCK:
gprs_ns_tx_block(peer->nsvc, nssd->cause);
break;
case S_NS_UNBLOCK:
gprs_ns_tx_unblock(peer->nsvc);
break;
}
}
}
return 0;
}