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Diffstat (limited to 'openbsc/src/gprs/gprs_llc.c')
-rw-r--r--openbsc/src/gprs/gprs_llc.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/openbsc/src/gprs/gprs_llc.c b/openbsc/src/gprs/gprs_llc.c
index 69c80417f..e873420ad 100644
--- a/openbsc/src/gprs/gprs_llc.c
+++ b/openbsc/src/gprs/gprs_llc.c
@@ -107,11 +107,28 @@ static const struct gprs_llc_params llc_default_params[] = {
LLIST_HEAD(gprs_llc_llmes);
void *llc_tall_ctx;
+/* If the TLLI is foreign, return its local version */
+static inline uint32_t tlli_foreign2local(uint32_t tlli)
+{
+ uint32_t new_tlli;
+
+ if (gprs_tlli_type(tlli) == TLLI_FOREIGN) {
+ new_tlli = tlli | 0x40000000;
+ DEBUGP(DLLC, "TLLI 0x%08x is foreign, converting to "
+ "local TLLI 0x%08x\n", tlli, new_tlli);
+ } else
+ new_tlli = tlli;
+
+ return new_tlli;
+}
+
/* lookup LLC Entity based on DLCI (TLLI+SAPI tuple) */
static struct gprs_llc_lle *lle_by_tlli_sapi(uint32_t tlli, uint8_t sapi)
{
struct gprs_llc_llme *llme;
+ tlli = tlli_foreign2local(tlli);
+
llist_for_each_entry(llme, &gprs_llc_llmes, list) {
if (llme->tlli == tlli || llme->old_tlli == tlli)
return &llme->lle[sapi];
@@ -322,6 +339,8 @@ int gprs_llc_tx_ui(struct msgb *msg, uint8_t sapi, int command,
lle = lle_by_tlli_sapi(msgb_tlli(msg), sapi);
if (!lle) {
struct gprs_llc_llme *llme;
+ LOGP(DLLC, LOGL_ERROR, "LLC TX: unknown TLLI 0x%08x, "
+ "creating LLME on the fly\n", msgb_tlli(msg));
llme = llme_alloc(msgb_tlli(msg));
lle = &llme->lle[sapi];
}
@@ -678,6 +697,8 @@ int gprs_llc_rcvmsg(struct msgb *msg, struct tlv_parsed *tv)
struct gprs_llc_llme *llme;
/* FIXME: don't use the TLLI but the 0xFFFF unassigned? */
llme = llme_alloc(msgb_tlli(msg));
+ LOGP(DLLC, LOGL_DEBUG, "LLC RX: unknown TLLI 0x08x, "
+ "creating LLME on the fly\n", msgb_tlli(msg));
lle = &llme->lle[llhp.sapi];
} else {
LOGP(DLLC, LOGL_NOTICE,