diff options
Diffstat (limited to 'epan/dissectors/packet-q931.c')
| -rw-r--r-- | epan/dissectors/packet-q931.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/epan/dissectors/packet-q931.c b/epan/dissectors/packet-q931.c index 5f075913f2..2156e501ef 100644 --- a/epan/dissectors/packet-q931.c +++ b/epan/dissectors/packet-q931.c @@ -1411,12 +1411,14 @@ dissect_q931_change_status_ie(tvbuff_t *tvb, int offset, int len, proto_tree *tr { guint8 octet; + if (len == 0) + return; octet = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_q931_extension_ind, tvb, offset, 1, FALSE); - proto_tree_add_text(tree, tvb, offset, 1, + proto_tree_add_text(tree, tvb, offset, 1, "%s", decode_enumerated_bitfield_shifted(octet, 0x40, 8, VALS(q931_status_preference_vals), "Preference: %s")); - proto_tree_add_text(tree, tvb, offset, 1, + proto_tree_add_text(tree, tvb, offset, 1, "%s", decode_enumerated_bitfield(octet, 0x07, 8, VALS(q931_new_status_vals), "New status: %s")); } @@ -2880,7 +2882,9 @@ dissect_q931_IEs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *root_tree, case CS0 | Q931_IE_CHANGE_STATUS: if (q931_tree != NULL) { - dissect_q931_change_status_ie(tvb, offset + 2, info_element_len, ie_tree); + dissect_q931_change_status_ie(tvb, + offset + 2, info_element_len, + ie_tree); } break; |