static void
slice_func(gpointer data, gpointer user_data)
{
drange_node *drnode = data;
slice_data_t *slice_data = user_data;
gint start_offset;
gint length = 0;
gint end_offset = 0;
guint field_length;
fvalue_t *fv;
drange_node_end_t ending;
if (slice_data->slice_failure) {
return;
}
start_offset = drange_node_get_start_offset(drnode);
ending = drange_node_get_ending(drnode);
fv = slice_data->fv;
field_length = fvalue_length(fv);
/* Check for negative start */
if (start_offset < 0) {
start_offset = field_length + start_offset;
if (start_offset < 0) {
slice_data->slice_failure = TRUE;
return;
}
}
/* Check the end type and set the length */
if (ending == DRANGE_NODE_END_T_TO_THE_END) {
length = field_length - start_offset;
if (length <= 0) {
slice_data->slice_failure = TRUE;
return;
}
}
else if (ending == DRANGE_NODE_END_T_LENGTH) {
length = drange_node_get_length(drnode);
if (start_offset + length > (int) field_length) {
slice_data->slice_failure = TRUE;
return;
}
}
else if (ending == DRANGE_NODE_END_T_OFFSET) {
end_offset = drange_node_get_end_offset(drnode);
if (end_offset < 0) {
end_offset = field_length + end_offset;
if (end_offset < start_offset) {
slice_data->slice_failure = TRUE;
return;
}
} else if (end_offset >= (int) field_length) {
slice_data->slice_failure = TRUE;
return;
}
length = end_offset - start_offset + 1;
}
else {
g_assert_not_reached();
}
g_assert(start_offset >=0 && length > 0);
fv->ftype->slice(fv, slice_data->bytes, start_offset, length);
}
/* WSLUA_ATTRIBUTE FieldInfo_value RO The value of this field. */
WSLUA_METAMETHOD FieldInfo__call(lua_State* L) {
/*
Obtain the Value of the field.
Previous to 1.11.4, this function retrieved the value for most field types,
but for `ftypes.UINT_BYTES` it retrieved the `ByteArray` of the field's entire `TvbRange`.
In other words, it returned a `ByteArray` that included the leading length byte(s),
instead of just the *value* bytes. That was a bug, and has been changed in 1.11.4.
Furthermore, it retrieved an `ftypes.GUID` as a `ByteArray`, which is also incorrect.
If you wish to still get a `ByteArray` of the `TvbRange`, use `FieldInfo:get_range()`
to get the `TvbRange`, and then use `Tvb:bytes()` to convert it to a `ByteArray`.
*/
FieldInfo fi = checkFieldInfo(L,1);
switch(fi->ws_fi->hfinfo->type) {
case FT_BOOLEAN:
lua_pushboolean(L,(int)fvalue_get_uinteger(&(fi->ws_fi->value)));
return 1;
case FT_UINT8:
case FT_UINT16:
case FT_UINT24:
case FT_UINT32:
case FT_FRAMENUM:
lua_pushnumber(L,(lua_Number)(fvalue_get_uinteger(&(fi->ws_fi->value))));
return 1;
case FT_INT8:
case FT_INT16:
case FT_INT24:
case FT_INT32:
lua_pushnumber(L,(lua_Number)(fvalue_get_sinteger(&(fi->ws_fi->value))));
return 1;
case FT_FLOAT:
case FT_DOUBLE:
lua_pushnumber(L,(lua_Number)(fvalue_get_floating(&(fi->ws_fi->value))));
return 1;
case FT_INT64: {
pushInt64(L,(Int64)(fvalue_get_sinteger64(&(fi->ws_fi->value))));
return 1;
}
case FT_UINT64: {
pushUInt64(L,fvalue_get_uinteger64(&(fi->ws_fi->value)));
return 1;
}
case FT_ETHER: {
Address eth = (Address)g_malloc(sizeof(address));
eth->type = AT_ETHER;
eth->len = fi->ws_fi->length;
eth->data = tvb_memdup(NULL,fi->ws_fi->ds_tvb,fi->ws_fi->start,fi->ws_fi->length);
pushAddress(L,eth);
return 1;
}
case FT_IPv4:{
Address ipv4 = (Address)g_malloc(sizeof(address));
ipv4->type = AT_IPv4;
ipv4->len = fi->ws_fi->length;
ipv4->data = tvb_memdup(NULL,fi->ws_fi->ds_tvb,fi->ws_fi->start,fi->ws_fi->length);
pushAddress(L,ipv4);
return 1;
}
case FT_IPv6: {
Address ipv6 = (Address)g_malloc(sizeof(address));
ipv6->type = AT_IPv6;
ipv6->len = fi->ws_fi->length;
ipv6->data = tvb_memdup(NULL,fi->ws_fi->ds_tvb,fi->ws_fi->start,fi->ws_fi->length);
pushAddress(L,ipv6);
return 1;
}
case FT_FCWWN: {
Address fcwwn = (Address)g_malloc(sizeof(address));
fcwwn->type = AT_FCWWN;
fcwwn->len = fi->ws_fi->length;
fcwwn->data = tvb_memdup(NULL,fi->ws_fi->ds_tvb,fi->ws_fi->start,fi->ws_fi->length);
pushAddress(L,fcwwn);
return 1;
}
case FT_IPXNET:{
Address ipx = (Address)g_malloc(sizeof(address));
ipx->type = AT_IPX;
ipx->len = fi->ws_fi->length;
ipx->data = tvb_memdup(NULL,fi->ws_fi->ds_tvb,fi->ws_fi->start,fi->ws_fi->length);
pushAddress(L,ipx);
return 1;
}
case FT_ABSOLUTE_TIME:
case FT_RELATIVE_TIME: {
NSTime nstime = (NSTime)g_malloc(sizeof(nstime_t));
*nstime = *(NSTime)fvalue_get(&(fi->ws_fi->value));
pushNSTime(L,nstime);
return 1;
}
case FT_STRING:
case FT_STRINGZ: {
gchar* repr = fvalue_to_string_repr(&fi->ws_fi->value,FTREPR_DISPLAY,BASE_NONE,NULL);
if (repr)
lua_pushstring(L,repr);
else
luaL_error(L,"field cannot be represented as string because it may contain invalid characters");
return 1;
}
case FT_NONE:
if (fi->ws_fi->length > 0 && fi->ws_fi->rep) {
/* it has a length, but calling fvalue_get() on an FT_NONE asserts,
so get the label instead (it's a FT_NONE, so a label is what it basically is) */
lua_pushstring(L, fi->ws_fi->rep->representation);
return 1;
}
return 0;
case FT_BYTES:
case FT_UINT_BYTES:
case FT_REL_OID:
case FT_SYSTEM_ID:
case FT_OID:
{
ByteArray ba = g_byte_array_new();
g_byte_array_append(ba, (const guint8 *) fvalue_get(&fi->ws_fi->value),
fvalue_length(&fi->ws_fi->value));
pushByteArray(L,ba);
return 1;
}
case FT_PROTOCOL:
{
ByteArray ba = g_byte_array_new();
tvbuff_t* tvb = (tvbuff_t *) fvalue_get(&fi->ws_fi->value);
g_byte_array_append(ba, (const guint8 *)tvb_memdup(wmem_packet_scope(), tvb, 0,
tvb_captured_length(tvb)), tvb_captured_length(tvb));
pushByteArray(L,ba);
return 1;
}
case FT_GUID:
default:
luaL_error(L,"FT_ not yet supported");
return 1;
}
}
