WSLUA_METHOD TvbRange_nstime(lua_State* L) {
/* Obtain a time_t structure from a `TvbRange`, as an `NSTime` object. */
#define WSLUA_OPTARG_TvbRange_nstime_ENCODING 2 /* An optional ENC_* encoding value to use */
TvbRange tvbr = checkTvbRange(L,1);
NSTime nstime;
const guint encoding = (guint) luaL_optinteger(L, WSLUA_OPTARG_TvbRange_nstime_ENCODING, 0);
if ( !(tvbr && tvbr->tvb)) return 0;
if (tvbr->tvb->expired) {
luaL_error(L,"expired tvb");
return 0;
}
nstime = g_new(nstime_t,1);
if (encoding == 0) {
if (tvbr->len == 4) {
nstime->secs = tvb_get_ntohl(tvbr->tvb->ws_tvb, tvbr->offset);
nstime->nsecs = 0;
} else if (tvbr->len == 8) {
nstime->secs = tvb_get_ntohl(tvbr->tvb->ws_tvb, tvbr->offset);
nstime->nsecs = tvb_get_ntohl(tvbr->tvb->ws_tvb, tvbr->offset + 4);
} else {
g_free(nstime);
WSLUA_ERROR(TvbRange_nstime,"The range must be 4 or 8 bytes long");
return 0;
}
pushNSTime(L, nstime);
lua_pushinteger(L, tvbr->len);
}
else if (encoding & ~ENC_STR_TIME_MASK) {
WSLUA_OPTARG_ERROR(TvbRange_nstime, ENCODING, "invalid encoding value");
}
else {
gint endoff = 0;
nstime_t *retval = tvb_get_string_time(tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len,
encoding, nstime, &endoff);
if (!retval || endoff == 0) {
g_free(nstime);
/* push nil nstime and offset */
lua_pushnil(L);
lua_pushnil(L);
}
else {
pushNSTime(L, nstime);
lua_pushinteger(L, endoff);
}
}
WSLUA_RETURN(2); /* The `NSTime` object and number of bytes used, or nil on failure. */
}
WSLUA_METHOD TvbRange_le_nstime(lua_State* L) {
/* Obtain a nstime from a TvbRange */
TvbRange tvbr = checkTvbRange(L,1);
NSTime nstime;
if ( !(tvbr && tvbr->tvb)) return 0;
if (tvbr->tvb->expired) {
luaL_error(L,"expired tvb");
return 0;
}
nstime = g_new(nstime_t,1);
if (tvbr->len == 4) {
nstime->secs = tvb_get_letohl(tvbr->tvb->ws_tvb, tvbr->offset);
nstime->nsecs = 0;
} else if (tvbr->len == 8) {
nstime->secs = tvb_get_letohl(tvbr->tvb->ws_tvb, tvbr->offset);
nstime->nsecs = tvb_get_letohl(tvbr->tvb->ws_tvb, tvbr->offset + 4);
} else {
g_free(nstime);
WSLUA_ERROR(TvbRange_nstime,"The range must be 4 or 8 bytes long");
return 0;
}
pushNSTime(L, nstime);
WSLUA_RETURN(1); /* The NSTime */
}
/* the following is used by TreeItem_add_packet_field() - this can THROW errors */
static proto_item *
try_add_packet_field(lua_State *L, TreeItem tree_item, TvbRange tvbr, const int hfid,
const ftenum_t type, const guint encoding, gint *ret_err)
{
gint err = 0;
proto_item* item = NULL;
gint endoff = 0;
switch(type) {
/* these all generate ByteArrays */
case FT_BYTES:
case FT_UINT_BYTES:
case FT_OID:
case FT_REL_OID:
case FT_SYSTEM_ID:
{
/* GByteArray and its data will be g_free'd by Lua */
GByteArray *gba = g_byte_array_new();
item = proto_tree_add_bytes_item(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
tvbr->offset, tvbr->len, encoding,
gba, &endoff, &err);
if (err == 0) {
pushByteArray(L, gba);
lua_pushinteger(L, endoff);
}
}
break;
case FT_ABSOLUTE_TIME:
case FT_RELATIVE_TIME:
{
/* nstime_t will be g_free'd by Lua */
nstime_t *nstime = (nstime_t *) g_malloc0(sizeof(nstime_t));
item = proto_tree_add_time_item(tree_item->tree, hfid, tvbr->tvb->ws_tvb,
tvbr->offset, tvbr->len, encoding,
nstime, &endoff, &err);
if (err == 0) {
pushNSTime(L,nstime);
lua_pushinteger(L, endoff);
}
}
break;
/* XXX: what about these? */
case FT_NONE:
case FT_PROTOCOL:
/* anything else just needs to be done the old fashioned way */
default:
item = proto_tree_add_item(tree_item->tree, hfid, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len, encoding);
lua_pushnil(L);
lua_pushnil(L);
break;
}
if (ret_err) *ret_err = err;
return item;
}
WSLUA_METAMETHOD NSTime__unm(lua_State* L) { /* Calculates the negative NSTime */
NSTime time1 = checkNSTime(L,1);
NSTime time2 = g_malloc (sizeof (nstime_t));
nstime_set_zero (time2);
nstime_subtract (time2, time1);
pushNSTime (L, time2);
return 1;
}
WSLUA_METAMETHOD NSTime__sub(lua_State* L) { /* Calculates the diff of two NSTimes */
NSTime time1 = checkNSTime(L,1);
NSTime time2 = checkNSTime(L,2);
NSTime time3 = g_malloc (sizeof (nstime_t));
nstime_delta (time3, time1, time2);
pushNSTime (L, time3);
return 1;
}
WSLUA_METAMETHOD NSTime__add(lua_State* L) { /* Calculates the sum of two NSTimes. */
NSTime time1 = checkNSTime(L,1);
NSTime time2 = checkNSTime(L,2);
NSTime time3 = (NSTime)g_malloc (sizeof (nstime_t));
nstime_sum (time3, time1, time2);
pushNSTime (L, time3);
return 1;
}
WSLUA_CONSTRUCTOR NSTime_new(lua_State *L) {
/* Creates a new NSTime object */
#define WSLUA_OPTARG_NSTime_new_SECONDS 1 /* Seconds */
#define WSLUA_OPTARG_NSTime_new_NSECONDS 2 /* Nano seconds */
NSTime time = g_malloc(sizeof(nstime_t));
if (!time) return 0;
time->secs = (time_t) luaL_optint(L,WSLUA_OPTARG_NSTime_new_SECONDS,0);
time->nsecs = luaL_optint(L,WSLUA_OPTARG_NSTime_new_NSECONDS,0);
pushNSTime(L,time);
WSLUA_RETURN(1); /* The new NSTime object. */
}
WSLUA_METAMETHOD FieldInfo__call(lua_State* L) {
/*
Obtain the Value of the field
*/
FieldInfo fi = checkFieldInfo(L,1);
switch(fi->hfinfo->type) {
case FT_BOOLEAN:
lua_pushboolean(L,(int)fvalue_get_uinteger(&(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->value)));
return 1;
case FT_INT8:
case FT_INT16:
case FT_INT24:
case FT_INT32:
lua_pushnumber(L,(lua_Number)fvalue_get_sinteger(&(fi->value)));
return 1;
case FT_FLOAT:
case FT_DOUBLE:
lua_pushnumber(L,(lua_Number)fvalue_get_floating(&(fi->value)));
return 1;
case FT_INT64: {
Int64 num = (Int64)g_malloc(sizeof(gint64));
*num = fvalue_get_integer64(&(fi->value));
pushInt64(L,num);
return 1;
}
case FT_UINT64: {
UInt64 num = (UInt64)g_malloc(sizeof(guint64));
*num = fvalue_get_integer64(&(fi->value));
pushUInt64(L,num);
return 1;
}
case FT_ETHER: {
Address eth = (Address)g_malloc(sizeof(address));
eth->type = AT_ETHER;
eth->len = fi->length;
eth->data = tvb_memdup(NULL,fi->ds_tvb,fi->start,fi->length);
pushAddress(L,eth);
return 1;
}
case FT_IPv4:{
Address ipv4 = (Address)g_malloc(sizeof(address));
ipv4->type = AT_IPv4;
ipv4->len = fi->length;
ipv4->data = tvb_memdup(NULL,fi->ds_tvb,fi->start,fi->length);
pushAddress(L,ipv4);
return 1;
}
case FT_IPv6: {
Address ipv6 = (Address)g_malloc(sizeof(address));
ipv6->type = AT_IPv6;
ipv6->len = fi->length;
ipv6->data = tvb_memdup(NULL,fi->ds_tvb,fi->start,fi->length);
pushAddress(L,ipv6);
return 1;
}
case FT_IPXNET:{
Address ipx = (Address)g_malloc(sizeof(address));
ipx->type = AT_IPX;
ipx->len = fi->length;
ipx->data = tvb_memdup(NULL,fi->ds_tvb,fi->start,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->value));
pushNSTime(L,nstime);
return 1;
}
case FT_STRING:
case FT_STRINGZ: {
gchar* repr = fvalue_to_string_repr(&fi->value,FTREPR_DISPLAY,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->length == 0) {
lua_pushnil(L);
return 1;
}
/* FALLTHROUGH */
case FT_BYTES:
case FT_UINT_BYTES:
case FT_GUID:
case FT_PROTOCOL:
case FT_REL_OID:
case FT_SYSTEM_ID:
case FT_OID: {
ByteArray ba = g_byte_array_new();
g_byte_array_append(ba, (const guint8 *)tvb_memdup(wmem_packet_scope(),fi->ds_tvb,fi->start,fi->length),fi->length);
pushByteArray(L,ba);
return 1;
}
default:
luaL_error(L,"FT_ not yet supported");
return 1;
}
}
/* 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;
}
}
