void DNS::skip_to_section_end(InputMemoryStream& stream,
const uint32_t num_records) const {
for (uint32_t i = 0; i < num_records; ++i) {
skip_to_dname_end(stream);
stream.skip(sizeof(uint16_t) * 2 + sizeof(uint32_t));
uint16_t data_size = stream.read_be<uint16_t>();
if (!stream.can_read(data_size)) {
throw malformed_packet();
}
stream.skip(data_size);
}
}
void DNS::skip_to_dname_end(InputMemoryStream& stream) const {
while (stream) {
uint8_t value = stream.read<uint8_t>();
if (value == 0) {
// Found the ending null byte, we're done
break;
}
else {
if ((value & 0xc0)) {
// This is an offset label, skip the second byte and we're done
stream.skip(1);
break;
}
else {
// This is an actual label, skip its contents
stream.skip(value);
}
}
}
}
void Dot11::parse_tagged_parameters(InputMemoryStream& stream) {
if (stream) {
while (stream.size() >= 2) {
OptionTypes opcode = static_cast<OptionTypes>(stream.read<uint8_t>());
uint8_t length = stream.read<uint8_t>();
if (!stream.can_read(length)) {
throw malformed_packet();
}
add_tagged_option(opcode, length, stream.pointer());
stream.skip(length);
}
}
}
