static void
dissect_fcp_cmnd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, proto_tree *tree, conversation_t *conversation, fc_hdr *fchdr, fcp_conv_data_t *fcp_conv_data)
{
int offset = 0;
int add_len = 0;
guint8 flags, rwflags, lun0;
guint16 lun = 0xffff;
tvbuff_t *cdb_tvb;
int tvb_len, tvb_rlen;
fcp_request_data_t *request_data = NULL;
proto_item *hidden_item;
fcp_proto_data_t *proto_data;
/* Determine the length of the FCP part of the packet */
flags = tvb_get_guint8(tvb, offset+10);
if (flags) {
add_len = tvb_get_guint8(tvb, offset+11) & 0x7C;
add_len = add_len >> 2;
}
hidden_item = proto_tree_add_uint(tree, hf_fcp_type, tvb, offset, 0, 0);
PROTO_ITEM_SET_HIDDEN(hidden_item);
lun0 = tvb_get_guint8(tvb, offset);
/* Display single-level LUNs in decimal for clarity */
/* I'm taking a shortcut here by assuming that if the first byte of the
* LUN field is 0, it is a single-level LUN. This is not true. For a
* real single-level LUN, all 8 bytes except byte 1 must be 0.
*/
if (lun0) {
proto_tree_add_item(tree, hf_fcp_multilun, tvb, offset, 8, ENC_NA);
lun = tvb_get_guint8(tvb, offset) & 0x3f;
lun <<= 8;
lun |= tvb_get_guint8(tvb, offset+1);
} else {
proto_tree_add_item(tree, hf_fcp_singlelun, tvb, offset+1,
1, ENC_BIG_ENDIAN);
lun = tvb_get_guint8(tvb, offset+1);
}
if (fchdr->itlq)
fchdr->itlq->lun = lun;
if (!pinfo->fd->flags.visited) {
proto_data = wmem_new(wmem_file_scope(), fcp_proto_data_t);
proto_data->lun = lun;
p_add_proto_data(wmem_file_scope(), pinfo, proto_fcp, 0, proto_data);
}
request_data = (fcp_request_data_t*)wmem_tree_lookup32(fcp_conv_data->luns, lun);
if (!request_data) {
request_data = wmem_new(wmem_file_scope(), fcp_request_data_t);
request_data->request_frame = pinfo->fd->num;
request_data->response_frame = 0;
request_data->request_time = pinfo->fd->abs_ts;
request_data->itl = wmem_new(wmem_file_scope(), itl_nexus_t);
request_data->itl->cmdset = 0xff;
request_data->itl->conversation = conversation;
wmem_tree_insert32(fcp_conv_data->luns, lun, request_data);
}
proto_tree_add_item(tree, hf_fcp_crn, tvb, offset+8, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_fcp_taskattr, tvb, offset+9, 1, ENC_BIG_ENDIAN);
dissect_task_mgmt_flags(pinfo, tree, tvb, offset+10);
proto_tree_add_item(tree, hf_fcp_addlcdblen, tvb, offset+11, 1, ENC_BIG_ENDIAN);
rwflags = tvb_get_guint8(tvb, offset+11);
if (fchdr->itlq) {
if (rwflags & 0x02) {
fchdr->itlq->task_flags |= SCSI_DATA_READ;
}
if (rwflags & 0x01) {
fchdr->itlq->task_flags |= SCSI_DATA_WRITE;
}
}
proto_tree_add_item(tree, hf_fcp_rddata, tvb, offset+11, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_fcp_wrdata, tvb, offset+11, 1, ENC_BIG_ENDIAN);
tvb_len = tvb_length_remaining(tvb, offset+12);
if (tvb_len > (16 + add_len))
tvb_len = 16 + add_len;
tvb_rlen = tvb_reported_length_remaining(tvb, offset+12);
if (tvb_rlen > (16 + add_len))
tvb_rlen = 16 + add_len;
cdb_tvb = tvb_new_subset(tvb, offset+12, tvb_len, tvb_rlen);
dissect_scsi_cdb(cdb_tvb, pinfo, parent_tree, SCSI_DEV_UNKNOWN, fchdr->itlq, request_data->itl);
proto_tree_add_item(tree, hf_fcp_dl, tvb, offset+12+16+add_len,
4, ENC_BIG_ENDIAN);
if (fchdr->itlq) {
fchdr->itlq->data_length = tvb_get_ntohl(tvb, offset+12+16+add_len);
}
if ( ((rwflags & 0x03) == 0x03)
&& tvb_length_remaining(tvb, offset+12+16+add_len+4) >= 4) {
proto_tree_add_item(tree, hf_fcp_bidir_dl, tvb, offset+12+16+add_len+4,
4, ENC_BIG_ENDIAN);
if (fchdr->itlq) {
fchdr->itlq->bidir_data_length = tvb_get_ntohl(tvb, offset+12+16+add_len+4);
}
}
}
static void
dissect_fcp_cmnd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, proto_tree *tree, conversation_t *conversation, fc_hdr *fchdr, fcp_conv_data_t *fcp_conv_data)
{
int offset = 0;
int add_len = 0;
guint8 flags, rwflags, lun0;
guint16 lun = 0xffff;
tvbuff_t *cdb_tvb;
int tvb_len;
fcp_request_data_t *request_data = NULL;
itl_nexus_t itl;
fcp_proto_data_t *proto_data;
/* Determine the length of the FCP part of the packet */
flags = tvb_get_guint8(tvb, offset+10);
if (flags) {
add_len = tvb_get_guint8(tvb, offset+11) & 0x7C;
add_len = add_len >> 2;
}
lun0 = tvb_get_guint8(tvb, offset);
/* Display single-level LUNs in decimal for clarity */
/* I'm taking a shortcut here by assuming that if the first byte of the
* LUN field is 0, it is a single-level LUN. This is not true. For a
* real single-level LUN, all 8 bytes except byte 1 must be 0.
*/
if (lun0) {
proto_tree_add_item(tree, hf_fcp_multilun, tvb, offset, 8, ENC_NA);
lun = tvb_get_guint8(tvb, offset) & 0x3f;
lun <<= 8;
lun |= tvb_get_guint8(tvb, offset+1);
} else {
proto_tree_add_item(tree, hf_fcp_singlelun, tvb, offset+1,
1, ENC_BIG_ENDIAN);
lun = tvb_get_guint8(tvb, offset+1);
}
if (!pinfo->fd->flags.visited) {
proto_data = wmem_new(wmem_file_scope(), fcp_proto_data_t);
proto_data->lun = lun;
p_add_proto_data(wmem_file_scope(), pinfo, proto_fcp, 0, proto_data);
}
request_data = (fcp_request_data_t*)wmem_map_lookup(fcp_conv_data->luns, GUINT_TO_POINTER((guint)lun));
if (!request_data) {
request_data = wmem_new(wmem_file_scope(), fcp_request_data_t);
request_data->request_frame = pinfo->fd->num;
request_data->response_frame = 0;
request_data->request_time = pinfo->fd->abs_ts;
request_data->itlq = wmem_new(wmem_file_scope(), itlq_nexus_t);
request_data->itlq->first_exchange_frame=0;
request_data->itlq->last_exchange_frame=0;
request_data->itlq->lun=lun;
request_data->itlq->scsi_opcode=0xffff;
request_data->itlq->task_flags=0;
request_data->itlq->data_length=0;
request_data->itlq->bidir_data_length=0;
request_data->itlq->fc_time=pinfo->fd->abs_ts;
request_data->itlq->flags=0;
request_data->itlq->alloc_len=0;
request_data->itlq->extra_data=NULL;
wmem_map_insert(fcp_conv_data->luns, GUINT_TO_POINTER((guint)lun), request_data);
}
/* populate the exchange struct */
if(!pinfo->fd->flags.visited){
if(fchdr->fctl&FC_FCTL_EXCHANGE_FIRST){
request_data->itlq->first_exchange_frame=pinfo->fd->num;
request_data->itlq->fc_time = pinfo->fd->abs_ts;
}
if(fchdr->fctl&FC_FCTL_EXCHANGE_LAST){
request_data->itlq->last_exchange_frame=pinfo->fd->num;
}
}
if (request_data->itlq)
request_data->itlq->lun = lun;
fchdr->lun = lun;
proto_tree_add_item(tree, hf_fcp_crn, tvb, offset+8, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_fcp_taskattr, tvb, offset+9, 1, ENC_BIG_ENDIAN);
dissect_task_mgmt_flags(pinfo, tree, tvb, offset+10);
proto_tree_add_item(tree, hf_fcp_addlcdblen, tvb, offset+11, 1, ENC_BIG_ENDIAN);
rwflags = tvb_get_guint8(tvb, offset+11);
if (request_data->itlq) {
if (rwflags & 0x02) {
request_data->itlq->task_flags |= SCSI_DATA_READ;
}
if (rwflags & 0x01) {
request_data->itlq->task_flags |= SCSI_DATA_WRITE;
}
}
proto_tree_add_item(tree, hf_fcp_rddata, tvb, offset+11, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_fcp_wrdata, tvb, offset+11, 1, ENC_BIG_ENDIAN);
tvb_len = tvb_length_remaining(tvb, offset+12);
if (tvb_len > (16 + add_len))
tvb_len = 16 + add_len;
itl.cmdset = 0xff;
itl.conversation = conversation;
cdb_tvb = tvb_new_subset_length(tvb, offset+12, tvb_len);
dissect_scsi_cdb(cdb_tvb, pinfo, parent_tree, SCSI_DEV_UNKNOWN, request_data->itlq, &itl);
proto_tree_add_item(tree, hf_fcp_dl, tvb, offset+12+16+add_len,
4, ENC_BIG_ENDIAN);
if (request_data->itlq) {
request_data->itlq->data_length = tvb_get_ntohl(tvb, offset+12+16+add_len);
}
if ( ((rwflags & 0x03) == 0x03)
&& tvb_length_remaining(tvb, offset+12+16+add_len+4) >= 4) {
proto_tree_add_item(tree, hf_fcp_bidir_dl, tvb, offset+12+16+add_len+4,
4, ENC_BIG_ENDIAN);
if (request_data->itlq) {
request_data->itlq->bidir_data_length = tvb_get_ntohl(tvb, offset+12+16+add_len+4);
}
}
}