guint
packet_mpeg_sect_header(tvbuff_t *tvb, guint offset,
proto_tree *tree, guint *sect_len, gboolean *ssi)
{
return packet_mpeg_sect_header_extra(tvb, offset, tree, sect_len,
NULL, ssi, NULL);
}
static void
dissect_etv_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int proto,
int hf_filter_info, int hf_reserved )
{
tvbuff_t *sub_tvb;
guint offset = 0;
proto_item *ti;
proto_item *pi;
proto_tree *etv_tree;
proto_item *items[PACKET_MPEG_SECT_PI__SIZE];
gboolean ssi;
guint reserved;
guint8 reserved2;
guint16 filter_info;
guint sect_len;
ti = proto_tree_add_item(tree, proto, tvb, offset, -1, ENC_NA);
etv_tree = proto_item_add_subtree(ti, ett_etv);
offset += packet_mpeg_sect_header_extra(tvb, offset, etv_tree, §_len,
&reserved, &ssi, items);
if (FALSE != ssi) {
proto_item *msg_error;
msg_error = items[PACKET_MPEG_SECT_PI__SSI];
PROTO_ITEM_SET_GENERATED(msg_error);
expert_add_info_format(pinfo, msg_error, PI_MALFORMED, PI_ERROR,
"Invalid section_syntax_indicator (should be 0)");
}
if (4 != reserved) {
proto_item *msg_error;
msg_error = items[PACKET_MPEG_SECT_PI__RESERVED];
PROTO_ITEM_SET_GENERATED(msg_error);
expert_add_info_format(pinfo, msg_error, PI_MALFORMED, PI_ERROR,
"Invalid reserved1 bits (should all be 100)");
}
col_append_fstr(pinfo->cinfo, COL_INFO, ", Length: %u", sect_len);
proto_item_append_text(ti, " Length=%u", sect_len);
if (1021 < sect_len) {
proto_item *msg_error;
msg_error = items[PACKET_MPEG_SECT_PI__LENGTH];
PROTO_ITEM_SET_GENERATED(msg_error);
expert_add_info_format(pinfo, msg_error, PI_MALFORMED, PI_ERROR,
"Invalid section_length (must not exceed 1021)");
}
filter_info = tvb_get_ntohs(tvb, offset);
col_append_fstr(pinfo->cinfo, COL_INFO, ", Filter: 0x%x", filter_info);
proto_item_append_text(ti, " Filter=0x%x", filter_info);
pi = proto_tree_add_item(etv_tree, hf_filter_info, tvb, offset, 2, ENC_BIG_ENDIAN);
if ((proto_etv_dii == proto) && (0xFBFB != filter_info)) {
PROTO_ITEM_SET_GENERATED(pi);
expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR,
"Invalid filter_info value (must be 0xFBFB)");
} else if ((proto_etv_ddb == proto) &&
((filter_info < 1) || (0xfbef < filter_info)))
{
PROTO_ITEM_SET_GENERATED(pi);
expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR,
"Invalid filter_info value (must be [0x0001-0xFBEF] inclusive)");
}
offset += 2;
reserved2 = tvb_get_guint8(tvb, offset);
pi = proto_tree_add_item(etv_tree, hf_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
if (0 != reserved2) {
PROTO_ITEM_SET_GENERATED(pi);
expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR,
"Invalid reserved2 bits (should all be 0)");
}
offset += 1;
sub_tvb = tvb_new_subset(tvb, offset, sect_len-7, sect_len-7);
call_dissector(dsmcc_handle, sub_tvb, pinfo, tree);
sect_len += 3 - 4; /* add header, remove crc */
packet_mpeg_sect_crc(tvb, pinfo, etv_tree, 0, sect_len);
}
static void
dissect_eiss(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint offset = 0, packet_length, sect_len;
proto_item *ti;
proto_item *pi;
proto_tree *eiss_tree;
proto_item *items[PACKET_MPEG_SECT_PI__SIZE];
gboolean ssi;
guint reserved;
guint8 reserved2;
guint8 sect_num, last_sect_num;
guint16 eiss_application_type;
guint8 platform_id_length;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "EISS");
ti = proto_tree_add_item(tree, proto_eiss, tvb, offset, -1, ENC_NA);
eiss_tree = proto_item_add_subtree(ti, ett_eiss);
offset += packet_mpeg_sect_header_extra(tvb, offset, eiss_tree, §_len,
&reserved, &ssi, items);
packet_length = sect_len + 3 - 4; /* + for the header, - for the crc */
if (FALSE != ssi) {
proto_item *msg_error;
msg_error = items[PACKET_MPEG_SECT_PI__SSI];
PROTO_ITEM_SET_GENERATED(msg_error);
expert_add_info(pinfo, msg_error, &ei_eiss_invalid_section_syntax_indicator);
}
if (0 != reserved) {
proto_item *msg_error;
msg_error = items[PACKET_MPEG_SECT_PI__RESERVED];
PROTO_ITEM_SET_GENERATED(msg_error);
expert_add_info_format(pinfo, msg_error, &ei_eiss_invalid_reserved_bits, "Invalid reserved1 bits (should all be 0)");
}
if (1021 < sect_len) {
proto_item *msg_error;
msg_error = items[PACKET_MPEG_SECT_PI__LENGTH];
PROTO_ITEM_SET_GENERATED(msg_error);
expert_add_info(pinfo, msg_error, &ei_eiss_invalid_section_length);
}
reserved2 = tvb_get_guint8(tvb, offset);
pi = proto_tree_add_item(eiss_tree, hf_eiss_reserved2, tvb, offset, 1, ENC_BIG_ENDIAN);
if (0 != reserved2) {
expert_add_info_format(pinfo, pi, &ei_eiss_invalid_reserved_bits, "Invalid reserved2 bits (should all be 0)");
}
offset++;
sect_num = tvb_get_guint8(tvb, offset);
last_sect_num = tvb_get_guint8(tvb, offset + 1);
pi = proto_tree_add_item(eiss_tree, hf_eiss_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
if (last_sect_num < sect_num) {
expert_add_info(pinfo, pi, &ei_eiss_section_number);
}
offset++;
proto_tree_add_item(eiss_tree, hf_eiss_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(eiss_tree, hf_eiss_protocol_version_major, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
proto_tree_add_item(eiss_tree, hf_eiss_protocol_version_minor, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
eiss_application_type = tvb_get_ntohs(tvb, offset);
pi = proto_tree_add_item(eiss_tree, hf_eiss_application_type, tvb, offset, 2, ENC_BIG_ENDIAN);
if (8 != eiss_application_type) {
expert_add_info(pinfo, pi, &ei_eiss_application_type);
}
offset += 2;
proto_tree_add_item(eiss_tree, hf_eiss_organisation_id, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(eiss_tree, hf_eiss_application_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
platform_id_length = tvb_get_guint8(tvb, offset);
pi = proto_tree_add_item(eiss_tree, hf_eiss_platform_id_length, tvb, offset, 1, ENC_BIG_ENDIAN);
if (0 != platform_id_length % 15) {
expert_add_info(pinfo, pi, &ei_eiss_platform_id_length);
}
offset++;
while (0 < platform_id_length) {
guint tmp;
tmp = dissect_etv_bif_platform_ids(tvb, eiss_tree, offset);
offset += tmp;
if (platform_id_length < tmp) {
platform_id_length = 0;
/* error */
} else {
platform_id_length -= tmp;
}
}
if (0 < packet_length) {
proto_tree *eiss_desc_tree;
pi = proto_tree_add_text(eiss_tree, tvb, offset,
packet_length-offset,
"%s", "EISS Descriptor(s)");
eiss_desc_tree = proto_item_add_subtree(pi, ett_eiss_desc);
while (offset < packet_length) {
offset += dissect_eiss_descriptors(tvb, pinfo,
eiss_desc_tree, offset);
}
}
packet_mpeg_sect_crc(tvb, pinfo, eiss_tree, 0, sect_len - 1);
}
