LaPDm: Refuse SUSPEND/RESUME/RECONNECT in BTS mode
The primitives for SUSPEND, RESUME and RECONNECT are only permitted on
the MS side of the LAPDm link, not on the BTS side. So we should check
for this and reject, accordingly.
diff --git a/src/gsm/lapdm.c b/src/gsm/lapdm.c
index 54d3a0b..d44335f 100644
--- a/src/gsm/lapdm.c
+++ b/src/gsm/lapdm.c
@@ -1092,6 +1092,23 @@
else
le = &lc->lapdm_dcch;
+ /* 4.1.1.5 / 4.1.1.6 / 4.1.1.7 all only exist on MS side, not
+ * BTS side */
+ if (le->mode == LAPDM_MODE_BTS) {
+ switch (msg_type) {
+ case RSL_MT_SUSP_REQ:
+ case RSL_MT_RES_REQ:
+ case RSL_MT_RECON_REQ:
+ LOGP(DLLAPD, LOGL_NOTICE, "(%p) RLL Message '%s' unsupported in BTS side LAPDm\n",
+ lc->name, rsl_msg_name(msg_type));
+ msgb_free(msg);
+ return -EINVAL;
+ break;
+ default:
+ break;
+ }
+ }
+
/* G.2.1 No action shall be taken on frames containing an unallocated
* SAPI.
*/