static void
swap_mac_addr(guint8 *swapped_addr, const guint8 *orig_addr)
{
int i;
for (i = 0; i < 6; i++) {
swapped_addr[i] = BIT_SWAP(orig_addr[i]);
}
}
static void
swap_mac_addr(guint8 *swapped_addr, tvbuff_t *tvb, gint offset)
{
int i;
for (i = 0; i < 6; i++) {
swapped_addr[i] = BIT_SWAP(tvb_get_guint8(tvb, offset+i));
}
}
static int
dissect_bmc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint8 message_type;
guint8 *p_rev, *reversing_buffer;
gint offset = 0;
gint i, len;
proto_item *ti;
proto_tree *bmc_tree;
tvbuff_t *bit_reversed_tvb;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BMC");
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, proto_bmc, tvb, 0, -1, ENC_NA);
bmc_tree = proto_item_add_subtree(ti, ett_bmc);
/* Needs bit-reversing. Create a new buffer, copy the message to it and bit-reverse */
len = tvb_length(tvb);
reversing_buffer = se_alloc(len);
memcpy(reversing_buffer, tvb_get_ptr(tvb, offset, -1), len);
p_rev = reversing_buffer;
/* Entire message is bit reversed */
for (i=0; i<len; i++, p_rev++)
*p_rev = BIT_SWAP(*p_rev);
/* Make this new buffer part of the display and provide a way to dispose of it */
bit_reversed_tvb = tvb_new_real_data(reversing_buffer, len, len);
tvb_set_child_real_data_tvbuff(tvb, bit_reversed_tvb);
add_new_data_source(pinfo, bit_reversed_tvb, "Bit-reversed Data");
message_type = tvb_get_guint8(bit_reversed_tvb, offset);
proto_tree_add_item(bmc_tree, hf_bmc_message_type, bit_reversed_tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(message_type, message_type_vals,"Reserved 0x%02x"));
switch (message_type) {
case MESSAGE_TYPE_CBS_MESSAGE:
offset = dissect_bmc_cbs_message(bit_reversed_tvb, pinfo, bmc_tree);
break;
case MESSAGE_TYPE_SCHEDULE_MESSAGE:
offset = dissect_bmc_schedule_message(bit_reversed_tvb, pinfo, bmc_tree);
break;
case MESSAGE_TYPE_CBS41_MESSAGE:
offset = dissect_bmc_cbs41_message(bit_reversed_tvb, pinfo, bmc_tree);
break;
default:
break;
}
return offset;
}
