diff options
Diffstat (limited to 'epan/dissectors/packet-ses.c')
| -rw-r--r-- | epan/dissectors/packet-ses.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/epan/dissectors/packet-ses.c b/epan/dissectors/packet-ses.c index c10cc0beac..d492aaa176 100644 --- a/epan/dissectors/packet-ses.c +++ b/epan/dissectors/packet-ses.c @@ -1805,7 +1805,7 @@ dissect_ses_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree) guint16 len; /* first, check do we have at least 4 bytes (type+length) */ - if (!tvb_bytes_exist(tvb, 0, 2)) + if (tvb_length(tvb) < 2) return FALSE; /* no */ /* can we recognize session PDU ? Return FALSE if not */ @@ -1833,7 +1833,7 @@ dissect_ses_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree) * misinterpreted as SES. * the starter in this case is fixed to 0x32 (SES_MINOR_SYNC_ACK for SES), * so if the parameter type is unknown, it's probably SIMATIC */ - if(type == 0x32 && tvb_bytes_exist(tvb, 0, 3)) { + if(type == 0x32 && tvb_length(tvb) >= 3) { type = tvb_get_guint8(tvb, offset+2); if (match_strval(type, param_vals) == NULL) { return FALSE; /* it's probably a SIMATIC protocol */ @@ -1847,7 +1847,7 @@ dissect_ses_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree) /* add header length */ len+=len_len; /* do we have enough bytes ? */ - if (!tvb_bytes_exist(tvb, 0, len)) + if (tvb_length(tvb) < len) return FALSE; /* no */ dissect_ses(tvb, pinfo, parent_tree); |