diff options
Diffstat (limited to 'epan/dissectors/packet-clnp.c')
| -rw-r--r-- | epan/dissectors/packet-clnp.c | 48 |
1 files changed, 14 insertions, 34 deletions
diff --git a/epan/dissectors/packet-clnp.c b/epan/dissectors/packet-clnp.c index 99997180ad..94b95cb54c 100644 --- a/epan/dissectors/packet-clnp.c +++ b/epan/dissectors/packet-clnp.c @@ -221,7 +221,7 @@ dissect_clnp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_ guint16 segment_offset = 0; guint16 total_length; guint16 cnf_cksum; - cksum_status_t cksum_status; + gboolean cksum_valid = TRUE; int offset; guchar src_len, dst_len, nsel, opt_len = 0; guint next_length; @@ -320,39 +320,19 @@ dissect_clnp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_ return 7; } cnf_cksum = tvb_get_ntohs(tvb, P_CLNP_CKSUM); - cksum_status = calc_checksum(tvb, 0, cnf_hdr_len, cnf_cksum); - switch (cksum_status) { - default: - /* - * No checksum present, or not enough of the header present to - * checksum it. - */ - proto_tree_add_uint(clnp_tree, hf_clnp_checksum, tvb, - P_CLNP_CKSUM, 2, - cnf_cksum); - break; + if (cnf_cksum == 0) { + /* No checksum present */ + proto_tree_add_checksum(clnp_tree, tvb, P_CLNP_CKSUM, hf_clnp_checksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NOT_PRESENT); + } else { + guint32 c0 = 0, c1 = 0; - case CKSUM_OK: - /* - * Checksum is correct. - */ - proto_tree_add_uint_format_value(clnp_tree, hf_clnp_checksum, tvb, - P_CLNP_CKSUM, 2, - cnf_cksum, - "0x%04x (correct)", - cnf_cksum); - break; - - case CKSUM_NOT_OK: - /* - * Checksum is not correct. - */ - proto_tree_add_uint_format_value(clnp_tree, hf_clnp_checksum, tvb, - P_CLNP_CKSUM, 2, - cnf_cksum, - "0x%04x (incorrect)", - cnf_cksum); - break; + if (osi_calc_checksum(tvb, 0, cnf_hdr_len, &c0, &c1)) { + /* Successfully processed checksum, verify it */ + proto_tree_add_checksum(clnp_tree, tvb, P_CLNP_CKSUM, hf_clnp_checksum, -1, NULL, pinfo, c0 | c1, ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY|PROTO_CHECKSUM_ZERO); + cksum_valid = (c0 | c1) ? FALSE : TRUE; + } else { + proto_tree_add_checksum(clnp_tree, tvb, P_CLNP_CKSUM, hf_clnp_checksum, -1, NULL, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS); + } } opt_len = cnf_hdr_len; @@ -475,7 +455,7 @@ dissect_clnp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_ ((cnf_type & CNF_MORE_SEGS) || segment_offset != 0) && tvb_bytes_exist(tvb, offset, segment_length - cnf_hdr_len) && segment_length > cnf_hdr_len && - cksum_status != CKSUM_NOT_OK) { + cksum_valid != FALSE) { fd_head = fragment_add_check(&clnp_reassembly_table, tvb, offset, pinfo, du_id, NULL, segment_offset, segment_length - cnf_hdr_len, |