diff options
| -rw-r--r-- | epan/dissectors/packet-icmp.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/epan/dissectors/packet-icmp.c b/epan/dissectors/packet-icmp.c index e6350b8c18..7f59b9917b 100644 --- a/epan/dissectors/packet-icmp.c +++ b/epan/dissectors/packet-icmp.c @@ -777,7 +777,7 @@ dissect_extensions(tvbuff_t * tvb, packet_info *pinfo, gint offset, proto_tree * guint8 version; guint8 class_num; guint8 c_type; - guint16 obj_length, obj_trunc_length; + guint16 obj_length, obj_trunc_length, checksum; proto_item *ti, *tf_object; proto_tree *ext_tree, *ext_object_tree; gint obj_end_offset; @@ -810,8 +810,15 @@ dissect_extensions(tvbuff_t * tvb, packet_info *pinfo, gint offset, proto_tree * tvb, offset, 2, ENC_BIG_ENDIAN); /* Checksum */ + checksum = tvb_get_ntohs(tvb, offset + 2); + if (checksum == 0) { + proto_tree_add_checksum(ext_tree, tvb, offset + 2, hf_icmp_ext_checksum, hf_icmp_ext_checksum_status, &ei_icmp_ext_checksum, + pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NOT_PRESENT); + + } else { proto_tree_add_checksum(ext_tree, tvb, offset + 2, hf_icmp_ext_checksum, hf_icmp_ext_checksum_status, &ei_icmp_ext_checksum, - pinfo, ip_checksum_tvb(tvb, 0, reported_length), ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY|PROTO_CHECKSUM_IN_CKSUM); + pinfo, ip_checksum_tvb(tvb, offset, reported_length), ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY|PROTO_CHECKSUM_IN_CKSUM); + } if (version != 1 && version != 2) { /* Unsupported version */ |