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Diffstat (limited to 'openbsc/src/libabis/input/dahdi.c')
-rw-r--r--openbsc/src/libabis/input/dahdi.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/openbsc/src/libabis/input/dahdi.c b/openbsc/src/libabis/input/dahdi.c
index a7b45a1af..eb66fa018 100644
--- a/openbsc/src/libabis/input/dahdi.c
+++ b/openbsc/src/libabis/input/dahdi.c
@@ -100,7 +100,7 @@ static int handle_ts1_read(struct osmo_fd *bfd)
struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "DAHDI TS1");
lapd_mph_type prim;
unsigned int sapi, tei;
- int ilen, ret;
+ int ilen, ret, error = 0;
uint8_t *idata;
if (!msg)
@@ -122,9 +122,21 @@ static int handle_ts1_read(struct osmo_fd *bfd)
DEBUGP(DMI, "<= len = %d, sapi(%d) tei(%d)", ret, sapi, tei);
- idata = lapd_receive(e1i_ts->driver.dahdi.lapd, msg->data, msg->len, &ilen, &prim);
- if (!idata && prim == 0)
- return -EIO;
+ idata = lapd_receive(e1i_ts->driver.dahdi.lapd, msg->data, msg->len, &ilen, &prim, &error);
+ if (!idata) {
+ switch(error) {
+ case LAPD_ERR_UNKNOWN_TEI:
+ /* We don't know about this TEI, probably the BSC
+ * lost local states (it crashed or it was stopped),
+ * notify the driver to see if it can do anything to
+ * recover the existing signalling links with the BTS.
+ */
+ e1inp_event(e1i_ts, S_INP_TEI_UNKNOWN, tei, sapi);
+ return -EIO;
+ }
+ if (prim == 0)
+ return -EIO;
+ }
msgb_pull(msg, 2);