int decode_block(const char* code_in, const int length_in, char* plaintext_out,
decodestate* state_in)
{
const char* codechar = code_in;
char* plainchar = plaintext_out;
char fragment;
*plainchar = state_in->plainchar;
switch (state_in->step) {
while (1) {
case step_a:
do {
if (codechar == code_in + length_in) {
state_in->step = step_a;
state_in->plainchar = *plainchar;
return plainchar - plaintext_out;
}
fragment = (char)decode_value(*codechar++);
} while (fragment < 0);
*plainchar = (fragment & 0x03f) << 2;
case step_b:
do {
if (codechar == code_in + length_in) {
state_in->step = step_b;
state_in->plainchar = *plainchar;
return plainchar - plaintext_out;
}
fragment = (char)decode_value(*codechar++);
} while (fragment < 0);
*plainchar++ |= (fragment & 0x030) >> 4;
*plainchar = (fragment & 0x00f) << 4;
case step_c:
do {
if (codechar == code_in + length_in) {
state_in->step = step_c;
state_in->plainchar = *plainchar;
return plainchar - plaintext_out;
}
fragment = (char)decode_value(*codechar++);
} while (fragment < 0);
*plainchar++ |= (fragment & 0x03c) >> 2;
*plainchar = (fragment & 0x003) << 6;
case step_d:
do {
if (codechar == code_in + length_in) {
state_in->step = step_d;
state_in->plainchar = *plainchar;
return plainchar - plaintext_out;
}
fragment = (char)decode_value(*codechar++);
} while (fragment < 0);
*plainchar++ |= (fragment & 0x03f);
}
}
/* control should not reach here */
return plainchar - plaintext_out;
}
void Ardb::PrintDB(const DBID& db)
{
Slice empty;
KeyObject start(empty, KV, db);
Iterator* iter = FindValue(start);
while (NULL != iter && iter->Valid())
{
Slice tmpkey = iter->Key();
KeyObject* kk = decode_key(tmpkey, NULL);
if (kk->db != db)
{
DELETE(kk);
break;
}
ValueObject v;
Buffer readbuf(const_cast<char*>(iter->Value().data()), 0, iter->Value().size());
decode_value(readbuf, v, false);
if (NULL != kk)
{
std::string str;
DEBUG_LOG("[%d]Key=%s, Value=%s", kk->type, kk->key.data(), v.ToString(str).c_str());
}
DELETE(kk);
iter->Next();
}
DELETE(iter);
}
NetGameEvent NetGameNetworkData::decode_event(const DataBuffer &data)
{
const unsigned char *d = data.get_data<unsigned char>();
unsigned int length = data.get_size();
if (length < 3)
throw Exception("Invalid network data");
unsigned int name_length = *reinterpret_cast<const unsigned short*>(d);
if (length < 2 + name_length + 1)
throw Exception("Invalid network data");
std::string name = std::string(reinterpret_cast<const char*>(d + 2), name_length);
NetGameEvent e(name);
unsigned int pos = 2 + name_length;
while (true)
{
if (pos >= length)
throw Exception("Invalid network data");
unsigned char type = d[pos++];
if (type == 0)
break;
e.add_argument(decode_value(type, d, length, pos));
}
return e;
}
void Ardb::Walk(WalkHandler* handler)
{
KeyObject start(Slice(), KV, 0);
Iterator* iter = FindValue(start);
uint32 cursor = 0;
while (NULL != iter && iter->Valid())
{
Slice tmpkey = iter->Key();
KeyObject* kk = decode_key(tmpkey, NULL);
if (NULL == kk)
{
break;
}
ValueObject v;
Buffer readbuf(const_cast<char*>(iter->Value().data()), 0, iter->Value().size());
decode_value(readbuf, v, false);
int ret = handler->OnKeyValue(kk, &v, cursor++);
DELETE(kk);
if (ret < 0)
{
break;
}
iter->Next();
}
DELETE(iter);
}
bool TupleIterator::next() {
if (next_ == end_) {
return false;
}
current_ = next_++;
position_ = decode_value(position_);
return true;
}
bool CollectionIterator::next() {
if (index_ + 1 >= count_) {
return false;
}
++index_;
position_ = decode_value(position_);
return true;
}
void Ardb::Walk(KeyObject& key, bool reverse, WalkHandler* handler)
{
bool isFirstElement = true;
Iterator* iter = FindValue(key);
if (NULL != iter && !iter->Valid() && reverse)
{
iter->SeekToLast();
isFirstElement = false;
}
uint32 cursor = 0;
while (NULL != iter && iter->Valid())
{
Slice tmpkey = iter->Key();
KeyObject* kk = decode_key(tmpkey, &key);
if (NULL == kk || kk->type != key.type
|| kk->key.compare(key.key) != 0)
{
DELETE(kk);
if (reverse && isFirstElement)
{
iter->Prev();
isFirstElement = false;
continue;
}
break;
}
ValueObject v;
Buffer readbuf(const_cast<char*>(iter->Value().data()), 0,
iter->Value().size());
decode_value(readbuf, v, false);
int ret = handler->OnKeyValue(kk, &v, cursor++);
DELETE(kk);
if (ret < 0)
{
break;
}
if (reverse)
{
iter->Prev();
}
else
{
iter->Next();
}
}
DELETE(iter);
}
int main(int argc, char *argv[], char *env[])
{
int text = 0;
int background = 0;
int height = 50;
int width = 0;
int x = 0, y = 0;
int size = 30;
int string_rectangle[8];
double angle = 0.0;
char value[255] = "";
char font[256] = "/usr/share/fonts/TTF/DejaVuSansMono.ttf";
char *err = NULL;
gdImagePtr im_out = NULL;
decode_value("TEXT=", value, 255);
// call gdImageStringFT with NULL image to obtain size
err = gdImageStringFT(NULL, &string_rectangle[0],
0, font, size, angle, 0, 0, value);
x = string_rectangle[2] - string_rectangle[6] + 6;
y = string_rectangle[3] - string_rectangle[7] + 6;
/* width = strlen(value) * 10 + 5; */
/* im_out = gdImageCreate(width, height); */
im_out = gdImageCreate(x, y);
background = gdImageColorAllocate(im_out, 255, 0, 255);
text = gdImageColorAllocate(im_out, 0, 0, 255);
/* get starting position */
x = 3 - string_rectangle[6];
y = 3 - string_rectangle[7];
gdImageFilledRectangle(im_out, 0, 0, x - 1, y - 1, background);
/* gdImageString(im_out, gdFontGetSmall(), 10, 10, value, text); */
err = gdImageStringFT(im_out, &string_rectangle[0],
text, font, size, angle, x, y, value);
printf("Content-type:image/gif\n\n");
gdImageGif(im_out, stdout);
gdImageDestroy(im_out);
return 0;
}
void dcf2time(void) {
if (signal_iter == 60) {
time.seconds = 0;
// Assume time signal is good only if all parities are correct
if (check_parity(21, 27, 28) && check_parity(29, 34, 35) && check_parity(36, 57, 58)) {
time.minutes = decode_value(21, 27);
time.hours = decode_value(29, 34);
time.date = decode_value(36, 41);
time.dow = decode_value(42, 44);
time.month = decode_value(45, 49);
time.year = decode_value(50, 57);
time_valid = true;
}
}
}
/** Decode DHCP option
*
* @param[in] ctx context to alloc new attributes in.
* @param[in,out] cursor Where to write the decoded options.
* @param[in] dict to lookup attributes in.
* @param[in] data to parse.
* @param[in] data_len of data to parse.
* @param[in] decoder_ctx Unused.
*/
ssize_t fr_dhcpv4_decode_option(TALLOC_CTX *ctx, fr_cursor_t *cursor,
fr_dict_t const *dict, uint8_t const *data, size_t data_len, UNUSED void *decoder_ctx)
{
ssize_t ret;
uint8_t const *p = data;
fr_dict_attr_t const *child;
fr_dict_attr_t const *parent;
FR_PROTO_TRACE("%s called to parse %zu byte(s)", __FUNCTION__, data_len);
if (data_len == 0) return 0;
FR_PROTO_HEX_DUMP(data, data_len, NULL);
parent = fr_dict_root(dict);
/*
* Padding / End of options
*/
if (p[0] == 0) return 1; /* 0x00 - Padding option */
if (p[0] == 255) { /* 0xff - End of options signifier */
size_t i;
for (i = 1; i < data_len; i++) {
if (p[i] != 0) {
FR_PROTO_HEX_DUMP(p + i, data_len - i, "ignoring trailing junk at end of packet");
break;
}
}
return data_len;
}
/*
* Everything else should be real options
*/
if ((data_len < 2) || (data[1] > data_len)) {
fr_strerror_printf("%s: Insufficient data", __FUNCTION__);
return -1;
}
child = fr_dict_attr_child_by_num(parent, p[0]);
if (!child) {
/*
* Unknown attribute, create an octets type
* attribute with the contents of the sub-option.
*/
child = fr_dict_unknown_afrom_fields(ctx, parent, fr_dict_vendor_num_by_da(parent), p[0]);
if (!child) return -1;
}
FR_PROTO_TRACE("decode context changed %s:%s -> %s:%s",
fr_int2str(fr_value_box_type_table, parent->type, "<invalid>"), parent->name,
fr_int2str(fr_value_box_type_table, child->type, "<invalid>"), child->name);
ret = decode_value(ctx, cursor, child, data + 2, data[1]);
if (ret < 0) {
fr_dict_unknown_free(&child);
return ret;
}
ret += 2; /* For header */
FR_PROTO_TRACE("decoding option complete, returning %zu byte(s)", ret);
return ret;
}
/** Decode DHCP suboptions
*
* @param[in] ctx context to alloc new attributes in.
* @param[in,out] cursor Where to write the decoded options.
* @param[in] parent of sub TLVs.
* @param[in] data to parse.
* @param[in] data_len of data parsed.
*/
static ssize_t decode_tlv(TALLOC_CTX *ctx, fr_cursor_t *cursor, fr_dict_attr_t const *parent,
uint8_t const *data, size_t data_len)
{
uint8_t const *p = data;
uint8_t const *end = data + data_len;
fr_dict_attr_t const *child;
if (data_len < 3) return -1; /* type, length, value */
FR_PROTO_TRACE("%s called to parse %zu byte(s)", __FUNCTION__, data_len);
FR_PROTO_HEX_DUMP(data, data_len, NULL);
/*
* Each TLV may contain multiple children
*/
while (p < end) {
ssize_t tlv_len;
if (p[0] == 0) {
p++;
continue;
}
/*
* RFC 3046 is very specific about not allowing termination
* with a 255 sub-option. But it's required for decoding
* option 43, and vendors will probably screw it up
* anyway.
*/
if (p[0] == 255) {
p++;
return p - data;
}
/*
* Everything else should be real options
*/
if ((end - p) < 2) {
fr_strerror_printf("%s: Insufficient data: Needed at least 2 bytes, got %zu",
__FUNCTION__, (end - p));
return -1;
}
if (p[1] > (end - p)) {
fr_strerror_printf("%s: Suboption would overflow option. Remaining option data %zu byte(s) "
"(from %zu), Suboption length %u", __FUNCTION__, (end - p), data_len, p[1]);
return -1;
}
child = fr_dict_attr_child_by_num(parent, p[0]);
if (!child) {
fr_dict_attr_t const *unknown_child;
FR_PROTO_TRACE("failed to find child %u of TLV %s", p[0], parent->name);
/*
* Build an unknown attr
*/
unknown_child = fr_dict_unknown_afrom_fields(ctx, parent,
fr_dict_vendor_num_by_da(parent), p[0]);
if (!unknown_child) return -1;
child = unknown_child;
}
FR_PROTO_TRACE("decode context changed %s:%s -> %s:%s",
fr_int2str(fr_value_box_type_table, parent->type, "<invalid>"), parent->name,
fr_int2str(fr_value_box_type_table, child->type, "<invalid>"), child->name);
tlv_len = decode_value(ctx, cursor, child, p + 2, p[1]);
if (tlv_len < 0) {
fr_dict_unknown_free(&child);
return tlv_len;
}
p += tlv_len + 2;
FR_PROTO_TRACE("decode_value returned %zu, adding 2 (for header)", tlv_len);
FR_PROTO_TRACE("remaining TLV data %zu byte(s)" , end - p);
}
FR_PROTO_TRACE("tlv parsing complete, returning %zu byte(s)", p - data);
return p - data;
}
NetGameEventValue NetGameNetworkData::decode_value(unsigned char type, const unsigned char *d, unsigned int length, unsigned int &pos)
{
switch (type)
{
case 1: // null
return NetGameEventValue(NetGameEventValue::null);
case 2: // uint
{
if (pos + 4 > length)
throw Exception("Invalid network data");
unsigned int v = *reinterpret_cast<const unsigned int*>(d + pos);
pos += 4;
return NetGameEventValue(v);
}
case 3: // int
{
if (pos + 4 > length)
throw Exception("Invalid network data");
int v = *reinterpret_cast<const int*>(d + pos);
pos += 4;
return NetGameEventValue(v);
}
case 4: // number
{
if (pos + 4 > length)
throw Exception("Invalid network data");
float v = *reinterpret_cast<const float*>(d + pos);
pos += 4;
return NetGameEventValue(v);
}
case 5: // false boolean
return NetGameEventValue(false);
case 6: // true boolean
return NetGameEventValue(true);
case 7: // string
{
if (pos + 2 > length)
throw Exception("Invalid network data");
unsigned short name_length = *reinterpret_cast<const unsigned short*>(d + pos);
pos += 2;
if (pos + name_length > length)
throw Exception("Invalid network data");
std::string value(reinterpret_cast<const char*>(d + pos), name_length);
pos += name_length;
return NetGameEventValue(value);
}
case 8: // complex
{
NetGameEventValue value(NetGameEventValue::complex);
while (true)
{
if (pos >= length)
throw Exception("Invalid network data");
unsigned char type = d[pos++];
if (type == 0)
break;
value.add_member(decode_value(type, d, length, pos));
}
return value;
}
case 9: // uchar
{
if (pos + 1 > length)
throw Exception("Invalid network data");
unsigned char v = *reinterpret_cast<const unsigned char*>(d + pos);
pos += 1;
return NetGameEventValue(v);
}
case 10: // char
{
if (pos + 1 > length)
throw Exception("Invalid network data");
char v = *reinterpret_cast<const char*>(d + pos);
pos += 1;
return NetGameEventValue(v);
}
case 11: // binary
{
if (pos + 2 > length)
throw Exception("Invalid network data");
unsigned short binary_length = *reinterpret_cast<const unsigned short*>(d + pos);
pos += 2;
if (pos + binary_length > length)
throw Exception("Invalid network data");
DataBuffer value(reinterpret_cast<const char*>(d + pos), binary_length);
pos += binary_length;
return NetGameEventValue(value);
}
default:
throw Exception("Invalid network data");
}
}
KeyObject* decode_key(const Slice& key, KeyObject* expected)
{
Buffer buf(const_cast<char*>(key.data()), 0, key.size());
uint32 header;
if (!BufferHelper::ReadFixUInt32(buf, header))
{
return NULL;
}
uint8 type = header & 0xFF;
uint32 db = header >> 8;
if (NULL != expected)
{
if (type != expected->type || db != expected->db)
{
return NULL;
}
}
Slice keystr;
if (!BufferHelper::ReadVarSlice(buf, keystr))
{
return NULL;
}
if (NULL != expected)
{
if (keystr != expected->key)
{
return NULL;
}
}
switch (type)
{
case HASH_FIELD:
{
Slice field;
if (!BufferHelper::ReadVarSlice(buf, field))
{
return NULL;
}
return new HashKeyObject(keystr, field, db);
}
case LIST_ELEMENT:
{
float score;
if (!BufferHelper::ReadFixFloat(buf, score))
{
return NULL;
}
return new ListKeyObject(keystr, score, db);
}
case SET_ELEMENT:
{
SetKeyObject* sk = new SetKeyObject(keystr, Slice(), db);
if (!decode_value(buf, sk->value, false))
{
DELETE(sk);
return sk;
}
return sk;
}
case ZSET_ELEMENT:
{
ZSetKeyObject* zsk = new ZSetKeyObject(keystr, Slice(), 0, db);
double score;
if (!BufferHelper::ReadFixDouble(buf, score)
|| !decode_value(buf, zsk->value))
{
DELETE(zsk);
return NULL;
}
zsk->score = score;
return zsk;
}
case ZSET_ELEMENT_SCORE:
{
ZSetScoreKeyObject* zsk = new ZSetScoreKeyObject(keystr,
Slice(), db);
if (!decode_value(buf, zsk->value))
{
DELETE(zsk);
return NULL;
}
return zsk;
}
case TABLE_INDEX:
{
Slice kname;
if (!BufferHelper::ReadVarSlice(buf, kname))
{
return NULL;
}
TableIndexKeyObject* ik = new TableIndexKeyObject(keystr, kname,
ValueObject(), db);
if (!decode_value(buf, ik->colvalue))
{
DELETE(ik);
return NULL;
}
uint32 len;
if (!BufferHelper::ReadVarUInt32(buf, len))
{
DELETE(ik);
return NULL;
}
for (uint32 i = 0; i < len; i++)
{
ValueObject v;
if (!decode_value(buf, v))
{
DELETE(ik);
return NULL;
}
ik->index.push_back(v);
}
return ik;
}
case TABLE_COL:
{
TableColKeyObject* tk = new TableColKeyObject(keystr, Slice(),
db);
Slice col;
if (!BufferHelper::ReadVarSlice(buf, col))
{
DELETE(tk);
return NULL;
}
tk->colname = col;
uint32 len;
if (!BufferHelper::ReadVarUInt32(buf, len))
{
DELETE(tk);
return NULL;
}
for (uint32 i = 0; i < len; i++)
{
ValueObject v;
if (!decode_value(buf, v))
{
DELETE(tk);
return NULL;
}
tk->index.push_back(v);
}
return tk;
}
case BITSET_ELEMENT:
{
uint64 index;
if (!BufferHelper::ReadVarUInt64(buf, index))
{
return NULL;
}
return new BitSetKeyObject(keystr, index, db);
}
case KEY_EXPIRATION_ELEMENT:
{
uint64 ts;
if (!BufferHelper::ReadVarUInt64(buf, ts))
{
return NULL;
}
return new ExpireKeyObject(keystr, ts, db);
}
case SET_META:
case ZSET_META:
case LIST_META:
case TABLE_META:
case TABLE_SCHEMA:
case BITSET_META:
case KEY_EXPIRATION_MAPPING:
case KV:
case SCRIPT:
default:
{
return new KeyObject(keystr, (KeyType) type, db);
}
}
}