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-rw-r--r--packet-gsm_sim.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/packet-gsm_sim.c b/packet-gsm_sim.c
index a2bc97c..e416ac7 100644
--- a/packet-gsm_sim.c
+++ b/packet-gsm_sim.c
@@ -796,7 +796,8 @@ dissect_bertlv(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
subtvb = tvb_new_subset(tvb, pos, len, len);
switch (tag) {
case 0xD0: /* proactive command */
- call_dissector(sub_handle_cap, subtvb, pinfo, tree);
+ if (sub_handle_cap)
+ call_dissector(sub_handle_cap, subtvb, pinfo, tree);
break;
}
@@ -930,7 +931,8 @@ dissect_gsm_apdu(guint8 ins, guint8 p1, guint8 p2, guint8 p3,
break;
case 0x14: /* TERMINAL RESPONSE */
subtvb = tvb_new_subset(tvb, offset+DATA_OFFS, p3, p3);
- call_dissector(sub_handle_cap, subtvb, pinfo, tree);
+ if (sub_handle_cap)
+ call_dissector(sub_handle_cap, subtvb, pinfo, tree);
break;
case 0x70: /* MANAGE CHANNEL */
proto_tree_add_item(tree, hf_chan_op, tvb, offset-3, 1, ENC_BIG_ENDIAN);